CN210738690U - Crankcase assembly, engine and motor tricycle - Google Patents

Abstract

The utility model relates to a crankcase assembly, an engine and a motor tricycle, which comprises a crankshaft, a crankcase body and a dry clutch used for outputting the power of the crankshaft, wherein the dry clutch is provided with a clutch flywheel; the clutch flywheel is arranged on the crankshaft in a transmission fit mode and is provided with a flywheel shaft neck, the inner circle of the flywheel shaft neck and the crankshaft form sealing in the axial direction, and the outer circle of the flywheel shaft neck and the shaft seat hole form rotary sealing in the axial direction; the crankcase assembly is beneficial to realizing the isolation of lubricating oil in the crankcase body through the sealing formed between the clutch flywheel and the crankshaft and between the clutch flywheel and the crankcase body in the axial direction, so as to avoid the leakage of the lubricating oil in the crankcase body in the axial direction; the arrangement mode is favorable for shortening the axial length of the crankshaft, shortening the axial size of the engine and enabling the structure of the engine to be more compact so as to avoid space waste; the motor tricycle is beneficial to compact layout and improvement of driving stability, energy consumption saving and use safety improvement.

Description

Crankcase assembly, engine and motor tricycle

Technical Field

The utility model relates to a crankcase seals the field, concretely relates to crankcase assembly, engine and motor tricycle.

Background

In the prior art, in order to meet the oil sealing requirement of a dry clutch, a joint between a clutch flywheel and a crankshaft of the dry clutch is usually arranged outside a crankcase body, and then the crankshaft and the crankcase body are sealed through oil sealing so as to avoid leakage of lubricating oil; in this case, the clutch flywheel of the dry clutch is disposed outside the crankcase body and does not participate in sealing. The main problems of this arrangement are: the axial size of the crankshaft is lengthened, the installation position of the dry clutch moves backwards in the axial direction, the structure is not compact enough, and the problem of space waste exists.

Based on above problem, the utility model provides a crankcase assembly, engine and motor tricycle. The dry clutch of the crankcase assembly is respectively sealed in the axial direction between the clutch flywheel and the crankshaft and between the clutch flywheel and the crankcase body, so that the isolation of lubricating oil in the crankcase body is realized, the leakage of the lubricating oil in the crankcase body in the axial direction is favorably avoided, the arrangement mode is favorable for shortening the axial length of the crankshaft, the axial size of an engine is favorably shortened, and the structure of the engine is more compact so as to avoid space waste; meanwhile, the compact layout of the motor tricycle is facilitated, the driving stability is improved, the energy consumption is saved, and the use safety is improved.

SUMMERY OF THE UTILITY MODEL

In view of this, the crankcase assembly, the engine and the motor tricycle of the present invention form a seal in the axial direction respectively between the clutch flywheel and the crankshaft and between the clutch flywheel and the crankcase, so as to isolate the lubricating oil in the crankcase, thereby preventing the lubricating oil in the crankcase from leaking out in the axial direction; meanwhile, the compact layout of the motor tricycle is facilitated, the driving stability is improved, the energy consumption is saved, and the use safety is improved.

The utility model provides a crankcase assembly, which comprises a crankshaft, a crankcase body and a dry clutch used for outputting the power of the crankshaft, wherein the dry clutch is provided with a clutch flywheel; the clutch flywheel is sleeved on the crankshaft, power is transmitted to the dry clutch through the clutch flywheel, and then the power is output through the dry clutch;

the clutch flywheel is arranged on the crankshaft in a transmission fit mode and is provided with a flywheel shaft neck, the inner circle of the flywheel shaft neck and the crankshaft form sealing in the axial direction, and the outer circle of the flywheel shaft neck and the shaft seat hole form rotary sealing in the axial direction; the crankcase body is provided with a shaft seat hole for the crankshaft to pass through, and a clutch flywheel sleeved on the crankshaft passes through the shaft seat hole of the crankcase body and is directly abutted against a corresponding part (the axial end part of a crankshaft bearing) in the crankcase body; the assembly mode is beneficial to shortening the axial length of the crankshaft, is beneficial to the axial forward movement (towards the side of the crankcase body) of the installation position of the dry clutch, shortens the axial size of the engine and enables the structure of the engine to be more compact so as to avoid space waste; the clutch flywheel shaft neck is arranged close to the side of the crankcase body; the outer circle of the crankshaft and the inner circle of the clutch flywheel shaft neck form sealing in the axial direction, and the outer circle of the clutch flywheel shaft neck and the crankcase body form rotating sealing in the axial direction, so that the lubricating oil in the crankcase body is prevented from leaking in the axial direction; the arrangement of the formed axial rotary seal belongs to the prior art, such as oil seal, and is not described in detail herein.

Furthermore, an annular groove is formed in the position, corresponding to the flywheel journal, of the outer circle of the crankshaft and is used for accommodating a sealing element and forming axial sealing between the crankshaft and the clutch flywheel journal; of course, an annular groove can be arranged on the inner circle of the shaft hole of the clutch flywheel journal, but for convenience of processing and assembling, the annular groove is preferably arranged on the outer circle of the crankshaft; an annular sealing element is arranged in the annular groove to form axial sealing between the crankshaft and the clutch flywheel after the crankshaft and the clutch flywheel are correspondingly assembled;

further, the sealing element is an O-shaped sealing ring; the O-shaped sealing ring is an elastic sealing ring, such as a rubber sealing ring with good elasticity, low cost and good wear resistance, and is not described herein again; the annular groove is arranged on the excircle of the crankshaft, the shaft shoulder of the crankshaft is arranged at the outer end of the sealing part (namely the arrangement part of the annular groove) between the crankshaft and the clutch flywheel in the axial direction, and the outer end is close to one end of the dry clutch;

furthermore, the end of the flywheel journal is abutted against the axial end part of the crankshaft bearing, and the end far away from the flywheel journal is axially positioned on the clutch flywheel through a locking nut; one end of the clutch flywheel props against the axial end part of the crankshaft bearing, and the other end of the clutch flywheel is locked through a locking nut and used for forming axial fixation on the clutch flywheel, so that the structural stability of the engine during operation is improved;

the crankshaft shoulder is correspondingly arranged at the flywheel journal and the shaft diameter is larger than that of the crankshaft close to the dry clutch side, and an axial sinking platform is arranged at the end of the flywheel journal; the axial sinking platform of the clutch flywheel is matched with the excircle of the crankshaft at the corresponding position, namely the inner circle aperture of the axial sinking platform of the clutch flywheel is larger than the inner circle aperture of the clutch flywheel close to the dry-type clutch side, and the shaft shoulder of the crankshaft can be abutted or not abutted with the bottom of the axial sinking platform of the clutch flywheel, so that the assembly of the clutch flywheel on the crankshaft is facilitated, and the structural stability of the engine during operation is further improved;

furthermore, a plurality of axial splines are arranged on the outer circle of the crankshaft along the circumferential direction, and a plurality of key grooves matched with the splines are correspondingly arranged on the inner circle of the shaft hole of the clutch flywheel and are used for radial positioning and transmission matching between the clutch flywheel and the crankshaft; the multiple axial splines on the excircle of the crankshaft are correspondingly arranged on the smaller shaft diameter side of the crankshaft (the crankshaft shaft shoulder is taken as a demarcation point, and the crankshaft shaft diameter close to the side of the dry clutch is smaller), the inner circle of the shaft hole of the clutch flywheel (the inner circle of the shaft hole of the clutch flywheel corresponding to the smaller shaft diameter side of the crankshaft, and the inner circle of the non-axial sinking platform position) is correspondingly provided with multiple key grooves, the multiple key grooves are arranged in parallel along the circumferential direction of the inner circle of the shaft hole of the clutch flywheel and form meshing transmission with the multiple splines arranged on the excircle of the crankshaft, the matching of the multiple splines and the multiple key grooves is favorable for forming the power transmission of the crankshaft to the clutch flywheel, and the power is transmitted to the dry clutch through the clutch flywheel, so that the power is favorably transmitted; meanwhile, the radial positioning and the axial positioning between the crankshaft and the clutch flywheel are facilitated; the plurality of key grooves extend towards the side of the dry type clutch, so that the plurality of key grooves arranged in the inner circle of the clutch flywheel and the plurality of splines are matched and installed conveniently;

furthermore, an annular boss is arranged on the outer circle of the clutch flywheel; the power input end of the dry clutch is sleeved outside the clutch flywheel and forms axial support against the annular boss; the power input end of the dry clutch is axially positioned by a gasket which is arranged between a clutch flywheel and a locking nut in a matching way; the axial positioning and locking of the dry clutch and the clutch flywheel are facilitated, and the stable power transmission of the clutch flywheel to the dry clutch is facilitated; the arrangement of the gasket belongs to the prior art, such as a ring gasket and the like, and is not described herein again; the transmission connection between the dry clutch and the clutch flywheel belongs to the prior art, and is realized by arranging a limit key and a limit key slot, which is not described herein again;

furthermore, a notch is arranged at the end part of the crankshaft, and a check ring which can be embedded into the notch is correspondingly arranged on the locking nut and used for stopping the locking nut after locking; the anti-backing ring is of a thin-wall structure, is integrally formed with the locking nut and is positioned on the side of the locking nut, which is far away from the clutch flywheel; after the locking nut is assembled and screwed, the backstop ring is knocked to be embedded into the reserved notch, so that the backstop effect is achieved;

the crankcase body protrudes towards the side of the dry clutch and forms a similar annular groove, and the groove depth of the similar annular groove is designed to enable the similar annular groove to accommodate a clutch flywheel and a part of the dry clutch; the dry clutch is connected with the crankshaft in a manner that the dry clutch is arranged in the annular groove of the crankcase body, so that the protection of high-speed transmission parts is facilitated.

The utility model also provides an engine, engine has as above crankcase assembly.

The utility model also provides a motor tricycle, above-mentioned engine install in motor tricycle is used for driving motor tricycle.

Further, the frame of the motor tricycle comprises two side sills and two mounting cross beams which are fixed between the two side sills and used for mounting the engine assembly, the two mounting cross beams are longitudinally arranged in parallel, the distance between the two mounting cross beams is the mounting distance of the engine assembly, and the mounting distance accounts for 10-14% of the total length of the motor tricycle; wherein the distance between the front end mounting cross beam and the foremost end of the motor tricycle accounts for 25-30% of the total length of the motor tricycle.

The utility model has the advantages that: the utility model discloses a crankcase assembly, engine and motor tricycle, through forming sealedly in the axial respectively between clutch flywheel and crankshaft and clutch flywheel and crankcase body, realize the isolation to the internal lubricating oil of crankcase, do benefit to and avoid the internal lubricating oil of crankcase to leak in the axial, pass the crankcase body and carry out axial spacing through the clutch flywheel of overcoat on the bent axle and realize the axial displacement assembly of dry clutch towards the axle seat side, do benefit to and shorten the axial length of bent axle, do benefit to and shorten the axial size of engine, make the structure of engine compacter in order to avoid the space waste; the compact layout of the motor tricycle is facilitated, the driving stability is improved, the energy consumption is saved, and the use safety is improved.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic view of a partial cross-sectional structure of the present invention;

fig. 2 is a schematic view of a partial structure of the crankshaft of the present invention.

Fig. 3 is a schematic structural view of the engine of the present invention mounted on a motor tricycle.

Detailed Description

Fig. 1 is the utility model discloses a local section structure schematic diagram, fig. 2 is the utility model discloses the local structure schematic diagram of bent axle, fig. 3 is the utility model discloses an engine mounting is in motor tricycle structure schematic diagram, as shown in the figure: the crankcase assembly of the embodiment comprises a crankshaft 1, a crankcase body 2 and a dry clutch 4 for outputting the power of the crankshaft, wherein the dry clutch 4 is provided with a clutch flywheel 3; the clutch flywheel 3 is sleeved on the crankshaft 1, power is transmitted to the dry clutch 4 through the clutch flywheel 3, and then the power is output through the dry clutch 4;

the crankshaft box body 2 is provided with a shaft base hole, the clutch flywheel 4 is arranged on the crankshaft 1 in a transmission fit mode and is provided with a flywheel shaft neck, the inner circle of the flywheel shaft neck and the crankshaft 1 form sealing in the axial direction, and the outer circle and the shaft base hole form rotary sealing in the axial direction; the crankcase body 2 is provided with a shaft seat hole for the crankshaft 1 to pass through, and a clutch flywheel 3 externally sleeved on the crankshaft 1 passes through the shaft seat hole of the crankcase body 2 and is directly abutted against a corresponding part (the axial end part of a crankshaft bearing 9) in the crankcase body 2; this assembly mode is advantageous for shortening the axial length of the crankshaft 1, for axial forward movement (movement toward the crankcase body 2 side) of the mounting position of the dry clutch 4, and for shortening the axial dimension of the engine and making the structure of the engine more compact to avoid space waste; the shaft neck of the clutch flywheel is arranged at the side close to the crankcase body 2; the outer circle of the crankshaft 1 and the inner circle of the clutch flywheel shaft neck form sealing in the axial direction, and the outer circle of the clutch flywheel shaft neck and the crankcase body 2 form rotary sealing in the axial direction, so that the lubricating oil in the crankcase body 2 is prevented from leaking in the axial direction; the arrangement of the rotary seal formed in the axial direction belongs to the prior art, such as the oil seal 8, and the like, and is not described in detail herein.

In this embodiment, an annular groove 11 is formed in the outer circle of the crankshaft 1 corresponding to the flywheel journal, and is used for accommodating the sealing element 7 and forming axial sealing between the crankshaft 1 and the clutch flywheel journal; of course, an annular groove may be arranged on the inner circle of the shaft hole of the clutch flywheel journal, but for convenience of processing and assembly, the annular groove 11 is preferably arranged on the outer circle of the crankshaft 1; an annular sealing element 7 is arranged in the annular groove 11 to form sealing between the crankshaft 1 and the clutch flywheel 3 in the axial direction after the crankshaft and the clutch flywheel are correspondingly assembled.

In this embodiment, the sealing member 7 is an O-ring; the O-shaped sealing ring is an elastic sealing ring, such as a rubber sealing ring with good elasticity, low cost and good wear resistance, and is not described herein again; the annular groove 11 is disposed on an outer circumference of the crankshaft, and a shoulder of the crankshaft 1 is disposed at an outer end of a seal (i.e., a location where the annular groove 11 is disposed) formed between the crankshaft 1 and the clutch flywheel 3 in the axial direction, where the outer end is an end close to the dry clutch 4 side.

In the embodiment, the flywheel journal end is abutted against the axial end part of the crankshaft bearing 9, and the clutch flywheel 3 is axially positioned at the end far away from the flywheel journal end through the locking nut 5; one end of the clutch flywheel 3 props against the axial end part of the crankshaft bearing 8, and the other end of the clutch flywheel 3 is locked through the locking nut 5 and used for forming axial fixation of the clutch flywheel 3, so that the structural stability of the engine during operation is improved.

The shaft shoulder of the crankshaft 1 corresponds to the flywheel shaft neck and the shaft diameter is larger than the shaft diameter of the crankshaft close to the dry clutch 4 side; an axial sinking platform 31 is arranged at the end of the flywheel journal; the axial sinking platform 31 of the clutch flywheel 3 is matched with the excircle of the crankshaft 1 at the corresponding position, namely the inner circle aperture of the axial sinking platform 31 of the clutch flywheel 3 is larger than the inner circle aperture of the side of the clutch flywheel 3 close to the dry clutch 4; the shaft shoulder of the crankshaft 1 and the bottom of the axial sinking platform 31 of the clutch flywheel 3 can not be abutted or can be abutted, so that the assembly of the clutch flywheel 3 on the crankshaft 1 and the structural stability during the operation of the engine are improved.

In this embodiment, the outer circle of the crankshaft 1 is provided with a plurality of axial splines 12 along the circumferential direction, and the inner circle of the shaft hole of the clutch flywheel 3 is correspondingly provided with a plurality of key slots matched with the splines 12 for radial positioning and transmission matching between the clutch flywheel 3 and the crankshaft 1; the multiple axial splines 12 on the outer circle of the crankshaft 1 are correspondingly arranged on the side with the smaller shaft diameter of the crankshaft 1 (the shaft shoulder of the crankshaft 1 is taken as a boundary point, and the shaft diameter of the crankshaft 1 close to the side of the dry clutch 4 is smaller), the inner circle of the shaft hole of the clutch flywheel 3 (the inner circle of the shaft hole of the clutch flywheel 3 corresponding to the side with the smaller shaft diameter of the crankshaft 1 and the inner circle of the non-axial sinking platform 31) is correspondingly provided with multiple key grooves, the multiple key grooves are arranged in parallel along the circumferential direction of the inner circle of the shaft hole of the clutch flywheel 3 and form meshing transmission with the multiple splines 12 on the outer circle of the crankshaft 1, and the matching of the multiple splines 2 and the multiple key grooves is favorable for forming the power transmission of the crankshaft 1 to the clutch flywheel 3 and transmitting the power to the dry clutch 4 through the clutch flywheel 3, so that the power is favorably transmitted; meanwhile, the radial positioning and the axial positioning between the crankshaft 1 and the clutch flywheel 3 are facilitated; the plurality of key slots extend towards the side of the dry clutch 4, so that the matching installation of the plurality of key slots arranged on the inner circle of the clutch flywheel 3 and the plurality of splines 12 is facilitated; the plurality of keyways are not labeled in the figures.

In this embodiment, an annular boss 32 is arranged on the outer circle of the clutch flywheel 3; the power input end of the dry clutch 4 is sleeved on the clutch flywheel 3 and forms axial support against the annular boss 32; the power input end of the dry clutch 4 is axially positioned by a gasket 6 which is arranged between the clutch flywheel 3 and the locking nut 4 in a matching way; the axial positioning and locking of the dry clutch 4 and the clutch flywheel 3 are facilitated, and the stable power transmission of the clutch flywheel 3 to the dry clutch 4 is facilitated; the arrangement of the gasket 6 belongs to the prior art, such as a ring gasket, and is not described herein again; the transmission connection between the dry clutch 4 and the clutch flywheel 3 belongs to the prior art, and is realized by arranging a limit key and a limit key slot, which is not described herein again.

In this embodiment, a notch 13 is formed in an end portion of the crankshaft 1, and the lock nut 5 is correspondingly provided with a retaining ring which can be embedded into the notch 13 and used for retaining after the lock nut 5 is locked; the anti-backing ring is of a thin-wall structure, is integrally formed with the locking nut 5 and is arranged on the side, far away from the clutch flywheel 4, of the locking nut 5; after the locking nut 5 is assembled and screwed, the anti-backing ring is knocked to be embedded into the reserved notch 13, so that the anti-backing effect is achieved; the retaining ring of the locking nut is not marked in the figure;

the crankcase body 2 protrudes towards the dry clutch 4 side and forms a similar annular groove 21, and the groove depth of the similar annular groove 21 is designed to enable the similar annular groove 21 to accommodate the clutch flywheel 3 and part of the dry clutch 4; the dry clutch 4 and the crankshaft 1 are connected and arranged in the annular groove 21 of the crankcase body 2, so that the high-speed transmission part is protected.

The present embodiment also provides an engine having a crankcase assembly as described above.

Fig. 3 is the utility model discloses an engine assembly installs in motor tricycle structure schematic diagram, as shown in the figure, engine assembly e install in motor tricycle is used for driving motor tricycle, and this engine is installed behind motor tricycle, can make motor tricycle structure more compact light, and whole car weight is lighter, makes driving stability improve greatly, practices thrift the energy consumption and improves the safety in utilization.

In the embodiment, the frame of the motor tricycle comprises two side sills a and b and two mounting cross beams c and d which are fixed between the two side sills a and b and used for mounting an engine assembly, the two mounting cross beams c and d are arranged in parallel along the longitudinal direction, the distance between the two mounting cross beams c and d is the mounting distance of the engine assembly, the mounting distance accounts for 10-14% of the total length of the motor tricycle, the preferred mounting distance is 12.5%, the mounting length is greatly reduced, and the use safety is improved; the distance between the front end mounting cross beam c and the foremost end of the motor tricycle (generally, the foremost end of the front wheel) accounts for 25-30% of the total length of the motor tricycle, the distance is preferably 28%, the mounting position is optimized, the mounting gravity center in the prior art is changed, and safety and stability are improved.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (10)

1. A crankcase assembly, characterized in that: the dry clutch comprises a crankshaft, a crankshaft box body and a dry clutch used for outputting the power of the crankshaft, wherein the dry clutch is provided with a clutch flywheel;

the clutch flywheel is arranged on the crankshaft in a transmission fit mode, a flywheel shaft neck is arranged on the crankshaft, the inner circle of the flywheel shaft neck and the crankshaft form sealing in the axial direction, and the outer circle of the flywheel shaft neck and the shaft seat hole form rotary sealing in the axial direction.

2. The crankcase assembly of claim 1, wherein: and an annular groove I is formed in the position, corresponding to the flywheel journal, of the excircle of the crankshaft and is used for accommodating a sealing element and forming axial sealing between the crankshaft and the clutch flywheel journal.

3. The crankcase assembly of claim 2, wherein: the sealing element is an O-shaped sealing ring.

4. The crankcase assembly of claim 1, wherein: the end of the flywheel journal forms the support against the axial end part of the crankshaft bearing, and the end far away from the flywheel journal forms the axial positioning of the clutch flywheel through a locking nut.

5. The crankcase assembly of claim 1, wherein: the excircle of the crankshaft is provided with a plurality of axial splines along the circumferential direction, the inner circle of the shaft hole of the clutch flywheel is correspondingly provided with a plurality of key grooves matched with the splines, and the key grooves are used for radial positioning and transmission matching between the clutch flywheel and the crankshaft.

6. The crankcase assembly of claim 4, wherein: an annular boss is arranged on the outer circle of the clutch flywheel; the power input end of the dry clutch is sleeved outside the clutch flywheel and forms axial support against the annular boss; the power input end of the dry clutch is axially positioned by a gasket which is arranged between a clutch flywheel and a locking nut in a matching way; the end part of the crankshaft is provided with a notch, and the locking nut is correspondingly provided with a backstop ring which can be embedded into the notch and is used for backstopping after the locking nut is locked.

7. The crankcase assembly of claim 1, wherein: the crankcase body protrudes towards the side of the dry clutch and forms a similar annular groove, and the groove depth of the similar annular groove is designed to enable the similar annular groove to accommodate the clutch flywheel and part of the dry clutch.

8. An engine, characterized in that: the engine has a crankcase assembly as claimed in any one of claims 1 to 7.

9. A motor tricycle, characterized in that: the engine of any one of claims 1 to 8 mounted to the motor tricycle and used to drive the motor tricycle.

10. Motor tricycle according to claim 9, characterized in that: the frame of the motor tricycle comprises two lower edge beams on two sides and two mounting cross beams which are fixed between the two lower edge beams on two sides and used for mounting an engine assembly, the two mounting cross beams are longitudinally arranged in parallel, the distance between the two mounting cross beams is the mounting distance of the engine assembly, and the mounting distance accounts for 10-14% of the total length of the motor tricycle; wherein the distance between the front end mounting cross beam and the foremost end of the motor tricycle accounts for 25-30% of the total length of the motor tricycle.

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