CN217207655U - Gear shifting mechanism - Google Patents

Abstract

The utility model discloses a gearshift, input shaft and sun gear fixed connection, output shaft and planet carrier and combination ring gear fixed connection, ring gear and synchronous ware tooth hub pass through synchronous ware support fixed connection, connecting plate and gearbox housing fixed connection. When the synchronizer sliding sleeve is combined with the second combined gear ring, the output shaft outputs coaxially at a speed reduction ratio; when the synchronizer sliding sleeve is combined with the first combined gear ring, the output shaft outputs coaxially at the same speed ratio. Two both ends meshing that combine ring gear and synchronous ware sliding sleeve can realize two grades, coaxial rotation in limited space, and the gearshift compact structure after the improvement, small, bearing capacity is big, and transmission power and velocity ratio scope are big, simple reliable, simultaneously the utility model discloses a gearshift also provides more possibilities because of small, for the institutional advancement and the design of the assembly of derailleur. The problem of current gearshift make the derailleur bulky, restrict the gear setting is solved.

Description

Gear shifting mechanism

Technical Field

The utility model belongs to the technical field of the derailleur is shifted, a gearshift is related to.

Background

The synchronizer is used as a vital gear shifting element in an automobile transmission, is a critical assembly with a decisive influence in the transmission, and is widely applied to various transmissions (MT, AMT, DCT and the like). At present, a parallel shaft type gear shifting mechanism is widely applied to various transmission products, the mechanism consists of a plurality of parallel shafts, gears, synchronizers and other parts, the structure is simple, the cost is low, but the structure has the following problems: firstly, the transmission is oversized; second, the design of the transmission gears is limited.

Fig. 1 shows a conventional parallel shaft synchronizer shifting structure in the prior art, wherein a transmission input shaft 43 is fixedly connected with a gear hub of a synchronizer 36, a second-gear input gear 35 and a first-gear input gear 37 are freely sleeved on the transmission input shaft 43, the second-gear output gear 35, the first-gear output gear 40 and a driving wheel 39 are fixedly connected with an intermediate shaft 41, and a transmission wheel 38 is fixedly connected with a transmission output shaft 44. When the sliding sleeve of the synchronizer 36 is combined with the second-gear input gear 35, the transmission output shaft 44 outputs coaxially with a speed increasing ratio; when the sliding sleeve of the synchronizer 36 is combined with the first-gear input gear 37, the transmission output shaft 44 outputs coaxially at a reduction ratio. The traditional parallel shaft type gear shifting mechanism consists of a plurality of parallel shafts, gears, synchronizers and other parts, is simple in structure and low in cost, but can cause the volume of a transmission to be overlarge, so that the gear design of the transmission is limited, and the purpose can be achieved by the fact that the traditional parallel shaft gear shifting mechanism needs a larger space for realizing coaxial output.

Disclosure of Invention

An object of the utility model is to solve the problem among the prior art, provide a gearshift.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

a gear shifting mechanism comprises an input shaft, a transmission shell, an output shaft, a planetary gear train assembly, a synchronizer assembly, a baffle plate and a connecting plate;

the planetary gear train assembly is sleeved outside the input shaft, and the output shaft is connected with the planetary gear train assembly;

the synchronizer assembly comprises a synchronizer component, a first combined gear ring and a second combined gear ring;

the synchronizer component and the first combined gear ring are sequentially sleeved on the outer side of the output shaft 4, the first combined gear ring is arranged at one end, away from the planetary gear train assembly, of the synchronizer component, and a baffle is sleeved on the outer side of the first combined gear ring;

the second combined gear ring and the connecting plate are sequentially sleeved on the outer side of the synchronizer assembly, and the connecting plate is respectively connected with the second combined gear ring and the transmission shell;

the synchronizer assemblies are engageable with the first and second conjoined gear rings, respectively.

The utility model discloses a further improvement lies in:

the synchronizer assembly comprises a synchronizer gear hub, a synchronizer sliding sleeve and a friction ring;

a synchronizer support is sleeved on the outer side of the first combined gear ring;

the synchronizer gear hub and the second combined gear ring are sequentially sleeved on the outer side of the synchronizer support, one end of the synchronizer gear hub is abutted against the first combined gear ring, the other end of the synchronizer gear hub is abutted against the second combined gear ring, and the friction ring is sleeved on the outer side of the synchronizer gear hub;

the synchronizer sliding sleeve is sleeved on the outer side of the synchronizer gear hub, and two ends of the synchronizer sliding sleeve can be respectively meshed with the first combined gear ring and the second combined gear ring.

The planetary gear train assembly comprises a sun gear, a planet pin, a planet gear, a gear ring and a planet carrier;

the sun wheel is sleeved outside the input shaft, and two ends of the sun wheel are provided with limiting mechanisms;

the planet carrier is sleeved on the outer side of the sun gear and is fixedly connected with the output shaft;

the planet pin is arranged in a planet pin hole of the planet carrier and connected with the output shaft; a planet wheel is sleeved outside the planet pin in an empty way;

the gear ring is sleeved on the outer sides of the planet wheel and the synchronizer support and is respectively connected with the planet wheel and the synchronizer support.

The limiting mechanism comprises a first bearing, a first spacer bush and a first clamping ring;

the first bearing and the first spacer bush are sequentially sleeved on the outer side of the input shaft in the axial direction, one end of the first spacer bush is connected with one end, away from the output shaft, of the sun gear, the other end of the first spacer bush is connected with the first bearing, and a first clamping ring is arranged at one end, close to the output shaft, of the sun gear.

The planet pin is connected with the output shaft through the elastic cylindrical pin;

and a needle bearing is sleeved on the outer side of the planet pin, and a planet wheel is sleeved on the outer side of the needle bearing.

And oil passages are arranged in the input shaft, the output shaft and the planet pin.

And a bowl-shaped dish plug is arranged in the oil passage of the planet pin.

A second bearing, a second snap ring and a second spacer bush are further axially and sequentially sleeved between the synchronizer support and the output shaft;

one end of the second spacer bush abuts against one end of the second bearing, the other end of the second spacer bush abuts against the first combined gear ring, and the other end of the second bearing is connected with the end face of the second clamping ring.

And a third bearing is further sleeved on the outer side of the output shaft, and the end face of the third bearing is abutted against the end face of the first combined gear ring.

The transmission housing includes a first transmission housing and a second transmission housing rigidly connected.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a gearshift, planet carrier and output shaft, the synchronizer subassembly has been established to the outside cover of output shaft, the synchronizer subassembly can combine the ring gear with first combination ring gear and second and mesh respectively, first combination ring gear and output shaft, the second combines the ring gear to be connected with the gearbox casing, can realize two fender in limited space, coaxial rotation, one side that first combination ring gear and second combine the ring gear has set up connecting plate and baffle respectively, can restrict gearshift's stroke, guarantee the stability of shifting, gearshift compact structure after the improvement, small, bearing capacity is big, transmission power and gear ratio scope are big, simple and reliable, simultaneously the utility model discloses a gearshift is because of small, also more possibilities are provided for the institutional advancement and the design of the assembly of derailleur.

Further, the utility model discloses all set up the oil duct in output shaft, input shaft and the planet round pin, can lubricate bearing parts such as gear, bearing, synchronous ware and the spline in the whole mechanism, prevent that these parts from becoming invalid.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a prior art shift mechanism configuration view;

fig. 2 is a schematic structural diagram of the present invention.

Wherein: 1-input shaft, 2-first transmission housing, 3-second transmission housing, 4-output shaft, 5-first bearing, 6-first spacer, 7-sun gear, 8-first snap ring, 9-oil guide pipe, 10-planet pin, 11-needle bearing, 12-thrust washer, 13-planet wheel, 14-gear ring, 15-elastic cylindrical pin, 16-bowl-shaped disc plug, 17-planet carrier, 18-synchronizer support, 19-third snap ring, 20-second bearing, 21-second snap ring, 22-second spacer, 23-synchronizer gear hub, 24-synchronizer slide sleeve, 25-first combination gear ring, 26-baffle plate, 27-second combination gear ring, 28-friction ring, 29-connecting plate, 30-cylindrical pin, 31-fourth snap ring, 32-bearing, 33-bolt, 34-lubricating oil channel, 35-second gear input gear, 36-synchronizer, 37-first gear input gear, 38-transmission wheel, 39-driving wheel, 40-first gear output gear, 41-intermediate shaft, 42-second gear output gear, 43-transmission input shaft and 44-transmission output shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships usually placed when the products of the present invention are used, the description is merely for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific direction, be constructed and operated in a specific direction, and therefore, cannot be understood as a limitation to the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The embodiment of the utility model provides a planetary gear train gearshift, this mechanism comprises planetary gear train, synchronous ware and other accessories, can realize two fender, coaxial drive, and compact structure, small, bearing capacity are big, transmission power and speed ratio scope are big, simple reliable, and this mechanism can provide more selections for the design of derailleur assembly. The traditional parallel shaft type gear shifting mechanism consists of a plurality of parallel shafts, gears, synchronizers and other parts, is simple in structure and low in cost, but can cause the size of the transmission to be overlarge, so that the gear design of the transmission is limited.

Compared with the prior art, the embodiment of the utility model provides a new scheme, input shaft 1 and sun gear 7 fixed connection, output shaft 4 and planet carrier 17 and combination ring gear fixed connection, ring gear 14 and synchronizer gear hub 23 pass through synchronizer support 18 fixed connection, connecting plate 29 and gearbox housing fixed connection. When the synchronizer sleeve 24 is combined with the second combination gear ring 27, the output shaft 4 outputs coaxially at a reduction ratio; when the synchronizer sleeve 24 is combined with the first combined ring gear 25, the output shaft 4 outputs coaxially at the same speed ratio.

The input shaft 1 is fixedly connected with the sun gear 7, and axial limiting is realized through the bearing 5, the spacer bush 6 and the snap ring 8; the planet carrier 17 is fixedly connected with the output shaft 4 to form a planet carrier assembly; the planet pin 10 is fixedly connected with the planet carrier assembly through an elastic cylindrical pin 15; the planet wheel 13 is sleeved on the planet pin 10 through the needle bearing 11 and is axially limited by the thrust washer 12; the synchronizer support 18 is fixedly connected with the gear ring 14, is axially limited by a snap ring 19 and is supported on the output shaft 4 by a bearing 20, a spacer 22, a first combined gear ring 25 and a bearing 32 are sequentially arranged on the output shaft 4, and a baffle 26 is fixedly connected with the first combined gear ring 25; the synchronizer hub 23 is fixedly connected with the synchronizer carrier 18; the connecting plate 29 is fixedly connected with the second combined gear ring 27, and the connecting plate 29 is fixed on the first transmission housing 2 and the second transmission housing 3 by the cylindrical pin 30; the first transmission housing 2 and the second transmission housing 3 are fixedly connected through a bolt 33, an oil guide pipe 9 is installed between the input shaft 1 and the output shaft 4, and the bowl-shaped disc plug 16 is installed at an oil passage opening of the planet pin 10.

The present invention will be described in further detail with reference to the accompanying drawings:

referring to fig. 2, the embodiment of the present invention discloses a gear shift mechanism, which includes an input shaft 1, a transmission housing, an output shaft 4, a sun gear 7, a sun gear limiting mechanism, a gear ring 14, a planet carrier 17, a synchronizer support 18, a synchronizer gear hub 23, a synchronizer sliding sleeve 24, a first combination gear ring 25, a baffle 26, a second combination gear ring 27, and a connecting plate 29.

The sun gear 7 is sleeved on the outer side of the input shaft 1 and fixedly connected with the input shaft 1, two ends of the sun gear 7 are provided with limiting mechanisms, the planet carrier 17 is sleeved on the outer side of the sun gear 7, and one end of the planet carrier 17 is connected with one end of the output shaft 4 close to the input shaft 1; the planet pin 10 is arranged in a connecting shaft hole of the planet carrier 17 and is connected with the output shaft 4; the outer side of the planet pin 10 is free from planet wheels 13.

First combination ring gear 25 is established to the outside cover of output shaft 4, output shaft 4 and first combination ring gear 25 fixed connection, synchronizer support 18 is established to the outside cover of first combination ring gear 25, the one end of synchronizer support 18 aligns with the terminal surface that output shaft 4 and planet carrier 17 are connected, synchronizer support 18's the outside along output shaft power take off's direction, ring gear 14, third snap ring 19, second combination ring gear 27, synchronizer gear hub 23 and fourth snap ring 31 are established to the axial in proper order cover.

The gear ring 14 is axially arranged on one side of the synchronizer support 18 close to the planet carrier 17, the gear ring 14 is also sleeved on the outer side of the connecting part of the output shaft 4 and the planet carrier 17 and the outer side of the third clamping ring 19, and one end of the gear ring 14 is close to the end face of the planet carrier 17 far away from the output shaft 4; the synchronizer sliding sleeve 24 is sleeved outside the synchronizer hub 23, and two ends of the synchronizer sliding sleeve 24 can be respectively meshed with the first combined gear ring 25 and the second combined gear ring 27.

A baffle 26 is sleeved outside the first combined gear ring 25; the outer side of the second combined gear ring 27 is sleeved with a connecting plate 29, the connecting plate 29 is connected with the transmission shell, one end of the connecting plate 29 is connected with the end face, away from the synchronizer sliding sleeve 24, of the second combined gear ring 27, and the other end of the connecting plate 29 is close to the end faces of the synchronizer support 18 and the gear ring 14 respectively. The stop plate 26 and the connecting plate 29 can limit the shift formation of the synchronizer.

Further, the limiting mechanism comprises a first bearing 5, a first spacer 6 and a first snap ring 8; the first bearing 5 and the first spacer 6 are sequentially sleeved on the outer side of the input shaft 1 in the axial direction, one end of the first spacer 6 is connected with one end, away from the output shaft 4, of the sun gear 7, the other end of the first spacer is connected with the first bearing 5, the outer side wall of the first bearing 5 is connected with the speed changer shell, and a first clamping ring 8 is arranged at one end, close to the output shaft 4, of the sun gear 7.

Further, the planet pin 10 is connected with the output shaft 4 through an elastic cylindrical pin 15; the cylindric lock 15 carries on spacingly and rotation-proof to planet round pin 10, and bearing 11 is established to the outside cover of planet round pin 10, and planet wheel 13 still overlaps in planet round pin 10's the outside through bearing 11 sky, and thrust washer 12 is established to planet round pin 10's the outside cover, and thrust washer 12 symmetry sets up the both ends at planet wheel 13.

Further, a friction ring 28 is sleeved between the synchronizer hub 23 and the synchronizer sleeve 24, and the friction ring 28 is located inside the synchronizer sleeve 24.

Further, a second bearing 20, a second snap ring 21 and a second spacer 22 are axially and sequentially sleeved between the synchronizer support 18 and the output shaft 4; one end of the second spacer 22 is connected to one end of the second bearing 20, the other end of the second spacer is close to the first combined gear ring 25, and the other end of the second bearing 20 is connected to an end face of the second snap ring 21.

Further, the outer side of the output shaft 4 is further sleeved with a third bearing 32, the end surface of the third bearing 32 abuts against the end surface of the first combined gear ring 25, and the outer side wall of the third bearing 32 is connected with the transmission housing.

Furthermore, oil ducts are arranged in the input shaft 1, the input shaft 4, the first spacer 6 and the planet pin 10 and are the same, an oil guide pipe 9 is arranged between the oil ducts of the input shaft 1 and the input shaft 4, a bowl-shaped disc plug 16 is arranged in the oil duct of the planet pin 10, and transmission lubricating oil flows into the lubricating oil ducts of the first spacer 6, the planet pin 10 and the output shaft 4 through a lubricating oil duct 34 in the input shaft 1, so that bearing parts such as gears, bearings, synchronizers and splines in the whole mechanism can be lubricated, and the parts are prevented from failing.

Further, the carrier 17 is welded to the output shaft 4, and the transmission case includes a first transmission case 1 and a second transmission case 2, and the first transmission case 1 and the second transmission case 2 are connected by a bolt 33.

The utility model discloses a theory of operation:

the power is transmitted to the sun gear 7 from the input shaft 1, when the synchronizer sliding sleeve 24 is meshed with the second combined gear ring 27, the gear ring 14 is fixedly connected with the transmission shell, namely the gear ring 14 is fixed, and the planet carrier assembly (the planet carrier 17 and the output shaft 4) outputs in the same direction at the speed reduction ratio; when the synchronizer sleeve 24 is engaged with the first combined gear ring 25, the planet carrier assembly (the planet carrier 17 and the output shaft 4) is fixedly connected with the gear ring 14, at the moment, the rotation speeds of the planet carrier assembly (the planet carrier 17 and the output shaft 4) and the sun gear 7 are the same, and the whole planetary gear train rotates together. The flapper 26 and the connecting plate 29 serve to limit the shifting stroke of the synchronizer. The transmission lubricating oil flows into the lubricating oil passages of the first spacer 6, the planet pins 10 and the output shaft 4 through the lubricating oil passage 34 in the input shaft 1, and can lubricate the bearing parts such as gears, bearings, synchronizers and splines in the whole mechanism, and prevent the parts from failing.

Therefore, compare with current traditional gearshift of shifting, the utility model provides a gearshift compact structure, small, bearing capacity is big, transmission power and velocity ratio scope are big, simple reliable, can use in various derailleur assemblies.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A gear shifting mechanism is characterized by comprising an input shaft (1), a transmission shell, an output shaft (4), a planetary gear train assembly, a synchronizer assembly, a baffle plate (26) and a connecting plate (29);

the planetary gear train assembly is sleeved on the outer side of the input shaft (1), and the output shaft (4) is connected with the planetary gear train assembly;

the synchronizer assembly comprises a synchronizer assembly, a first combining gear ring (25) and a second combining gear ring (27);

the synchronizer component and the first combined gear ring (25) are sequentially sleeved on the outer side of the output shaft (4), the first combined gear ring (25) is arranged at one end, away from the planetary gear train assembly, of the synchronizer component, and a baffle plate (26) is sleeved on the outer side of the first combined gear ring (25);

the second combined gear ring (27) and the connecting plate (29) are sequentially sleeved on the outer side of the synchronizer assembly, and the connecting plate (29) is respectively connected with the second combined gear ring (27) and the transmission shell;

the synchronizer assemblies are engageable with a first and a second conjugated ring gear (25, 27), respectively.

2. A gear shift mechanism according to claim 1, characterized in that the synchronizer assembly comprises a synchronizer hub (23), a synchronizer sleeve (24) and a friction ring (28);

a synchronizer support (18) is sleeved on the outer side of the first combined gear ring (25);

the synchronizer gear hub (23) and the second combined gear ring (27) are sequentially sleeved on the outer side of the synchronizer support (18), one end of the synchronizer gear hub (23) abuts against the first combined gear ring (25), the other end of the synchronizer gear hub abuts against the second combined gear ring (27), and the friction ring (28) is sleeved on the outer side of the synchronizer gear hub (23);

the synchronizer sliding sleeve (24) is sleeved on the outer side of the synchronizer gear hub (23), and two ends of the synchronizer sliding sleeve (24) can be respectively meshed with the first combined gear ring (25) and the second combined gear ring (27).

3. A gear shift mechanism according to claim 2, characterised in that the planetary gear train assembly comprises a sun gear (7), planet pins (10), planet wheels (13), a ring gear (14) and a planet carrier (17);

the sun gear (7) is sleeved on the outer side of the input shaft (1), and two ends of the sun gear (7) are provided with limiting mechanisms;

the planet carrier (17) is sleeved on the outer side of the sun gear (7), and the planet carrier (17) is fixedly connected with the output shaft (4);

the planet pin (10) is arranged in a planet pin hole of the planet carrier (17) and is connected with the output shaft (4); the outer side of the planet pin (10) is sleeved with a planet wheel (13) in an empty way;

the gear ring (14) is sleeved on the outer sides of the planet wheel (13) and the synchronizer support (18) and is respectively connected with the planet wheel (13) and the synchronizer support (18).

4. A gear change mechanism according to claim 3, wherein the limiting mechanism comprises a first bearing (5), a first spacer (6) and a first snap ring (8);

first bearing (5) and first spacer (6) axial are overlapped in proper order and are established in the outside of input shaft (1), and the one end of first spacer (6) is connected with sun gear (7) keep away from the one end of output shaft (4), and the other end is connected with first bearing (5), and sun gear (7) are close to the one end of output shaft (4) and set up first snap ring (8).

5. A gear change mechanism according to claim 3, characterised in that the planet pin (10) is connected to the output shaft (4) by means of a resilient cylindrical pin (15);

a needle bearing (11) is sleeved on the outer side of the planet pin (10), and a planet wheel (13) is sleeved on the outer side of the needle bearing (11).

6. A gear change mechanism according to claim 5, characterised in that oil channels are provided inside the input shaft (1), the output shaft (4) and the planet pins (10).

7. A gear change mechanism according to claim 6, characterized in that a bowl shaped disc plug (16) is arranged in the oil channel of the planet pin (10).

8. A gear shift mechanism according to claim 2, wherein a second bearing (20), a second snap ring (21) and a second spacer (22) are further axially sleeved between the synchronizer support (18) and the output shaft (4) in sequence;

one end of the second spacer bush (22) abuts against one end of the second bearing (20), the other end of the second spacer bush abuts against the first combined gear ring (25), and the other end of the second bearing (20) is connected with the end face of the second clamping ring (21).

9. A gear change mechanism according to any one of claims 1-8, characterised in that a third bearing (32) is also provided on the outer side of the output shaft (4), the end surface of the third bearing (32) abutting against the end surface of the first coupling ring gear (25).

10. A gear change mechanism according to any one of claims 1-8, characterised in that the transmission housing comprises a first transmission housing (2) and a second transmission housing (3), the first transmission housing (2) and the second transmission housing (3) being rigidly connected.

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