CN211038830U - Engine assembly and motor tricycle - Google Patents

Abstract

The utility model relates to an engine assembly and a motor tricycle, which comprises an engine body, a crankcase assembly and an auxiliary box body assembly; the crankcase assembly comprises a crankcase body and a crankshaft, and a shaft seat hole I is coaxially formed in the shaft end of the crankshaft, which extends out of the crankcase body; the auxiliary box body assembly comprises an auxiliary box body and an output shaft, one end of the output shaft is coaxially supported in the shaft seat hole I in a rotating fit mode, and the other end of the output shaft is supported in the auxiliary box body in a rotating fit mode and used for outputting power; the dual functions of rotation and support are facilitated, load sharing is facilitated, and the service lives of the output shaft and other support bearings are prolonged; the isolation of lubricating oil in the crankshaft box body is facilitated, and the lubricating oil in the crankshaft box body is prevented from leaking into the auxiliary box body in the axial direction; meanwhile, the axial length of the crankshaft is favorably shortened, the length of the box body is shortened, the structure of the engine is compact, the size of the engine is favorably reduced, and the light weight of the engine is favorably realized; the motor tricycle is beneficial to greatly improving the running stability of the motor tricycle, saving energy consumption and improving the use safety.

Description

Engine assembly and motor tricycle

Technical Field

The utility model relates to an engine field and application, concretely relates to engine assembly and motor tricycle.

Background

The engine crankshaft is the most important component in an engine. It takes the force from the connecting rod and converts it into torque that is output by the crankshaft and drives other accessories of the engine. The crankshaft is subjected to bending and torsional loads due to the combined action of centrifugal force of the rotating mass, gas inertia force that varies periodically, and reciprocating inertia force.

The existing engine crankshaft has the function of driving some functional parts to rotate through self-rotation, but does not have the function of supporting other functional parts to rotate, so that some functional parts can complete the rotating function only by designing supporting points by self, and on one hand, the problems of complex structure and heavy weight of the engine are caused; on the other hand, due to the large size of the functional parts assembled on the crankshaft, the provision of separate support points is difficult to implement in terms of spatial structural arrangement.

Based on above problem, the utility model provides an engine assembly and motor tricycle. The engine assembly is beneficial to the exertion of dual functions of rotation and support, is beneficial to the sharing of load, and improves the service life of an output shaft and other support bearings; the isolation of lubricating oil in the crankshaft box body is facilitated, and the lubricating oil in the crankshaft box body is prevented from leaking into the auxiliary box body in the axial direction; meanwhile, the axial length of the crankshaft is favorably shortened, the length of the box body is shortened, the structure of the engine is compact, the size of the engine is favorably reduced, and the light weight of the engine is favorably realized; the motor tricycle is favorable for greatly improving the running stability of the motor tricycle, saving energy consumption and improving the use safety.

SUMMERY OF THE UTILITY MODEL

In view of this, the engine assembly and the motor tricycle of the present invention are beneficial to the exertion of dual functions of rotation and support, the sharing of load, and the improvement of the service life of the output shaft and other support bearings; the isolation of lubricating oil in the crankshaft box body is facilitated, and the lubricating oil in the crankshaft box body is prevented from leaking into the auxiliary box body in the axial direction; meanwhile, the axial length of the crankshaft is favorably shortened, the length of the box body is shortened, the structure of the engine is compact, the size of the engine is favorably reduced, and the light weight of the engine is favorably realized; the motor tricycle is favorable for greatly improving the running stability of the motor tricycle, saving energy consumption and improving the use safety.

The utility model discloses an engine assembly, which comprises an engine body, a crankcase assembly and an auxiliary box body assembly; the crankcase assembly comprises a crankcase body and a crankshaft, and a shaft seat hole I is coaxially formed in the shaft end of the crankshaft, which extends out of the crankcase body; the crankcase body is provided with a shaft seat hole II for the crankshaft to pass through, so that a clutch flywheel (sleeved outside the crankshaft) can directly abut against a crankshaft bearing, the mounting position of the dry clutch is axially moved forwards (moved towards the side of the crankcase body), the axial size of the engine is shortened, and the structure of the engine is more compact to avoid space waste;

the auxiliary box body assembly comprises an auxiliary box body and an output shaft, one end of the output shaft is coaxially supported in the shaft seat hole I in a rotating fit mode, and the other end of the output shaft is supported in the auxiliary box body in a rotating fit mode and used for outputting power; the mutual support between the output shaft and the crankshaft is facilitated, the stress of the output shaft is changed from cantilever stress to support stress, the stress borne by the shaft section of the output shaft is reduced, the service life of the output shaft is prolonged, meanwhile, partial load is shared, the stress of a bearing at the other end of the output shaft is reduced, and the service life of the bearing at the other end of the output shaft is prolonged; and do benefit to and shorten the connecting length of bent axle and output shaft, shorten the overall length of engine box, reduce the engine volume and do benefit to the lightweight of engine, and compact structure.

Furthermore, the crankcase assembly also comprises a dry clutch used for inputting the power of the crankshaft, the auxiliary box body is fixedly connected with the crankcase body, the dry clutch is positioned in the auxiliary box body, and the dry clutch is used for outputting the input power of the crankshaft to an output shaft or disconnecting the input power of the crankshaft; the protection of the dry clutch is facilitated and the safety during high-speed operation is improved;

further, the output shaft is coaxially supported in the shaft seat hole I through the rotational fit of the needle bearing; the needle bearing is assembled in the shaft seat hole I in an interference mode and is coaxially supported with the crankshaft through the needle bearing; the roller pins of the roller pin bearing have high hardness and high wear resistance and can rotate, so that the support of the output shaft and the crankshaft is facilitated; the coaxial rotation of the crankshaft and the output shaft and the exertion of dual functions of support are facilitated;

further, the dry clutch has 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 flywheel shaft neck is one end of the clutch flywheel close to the side of the crankcase body; the inner circle of the flywheel journal and the crankshaft form a seal in the axial direction, and a rotary seal is formed between the outer circle and a shaft seat hole II arranged in the crankshaft box body in the axial direction; the lubricating oil in the crankshaft box body is prevented from leaking to the auxiliary box body area 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 herein again;

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; 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; one end of the output shaft, which is far away from the crankshaft, is supported on the auxiliary box body through a bearing in a rotating fit manner and is used for outputting power; the support of the output shaft is facilitated, the service life of the output shaft is prolonged, and the power output is facilitated;

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;

further, the flywheel journal end forms a stop against the crankshaft bearing axial end; the axial length of the crankshaft is favorably shortened, the axial forward movement (movement towards the side of the crankcase body) of the installation position of the dry clutch is favorably realized, and the axial size of the engine is shortened, so that the structure of the engine is more compact, and the space waste is avoided; an annular boss is arranged on the outer circle of the flywheel far away from the axle neck end, and the power input end of the dry clutch is sleeved outside the clutch flywheel and forms axial support against the annular boss; the structural stability of the engine during operation is improved;

the annular boss of the clutch flywheel is fixedly connected with the power input end of the dry clutch through a connecting piece, and the output shaft is driven to rotate through the combination of the friction disc so as to output power; the annular boss and the power input end of the dry clutch are axially provided with mounting holes for the connection piece to pass through and fix; the selection of the connecting piece belongs to the prior art, such as a bolt and the like, and is not described herein again;

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 engine assembly of the utility model is supported by the output shaft supported in the shaft seat hole I of the crankshaft and the rotation support of the crankshaft, thereby being beneficial to the exertion of dual functions of rotation and support, being beneficial to the sharing of load and improving the service life of the output shaft and other support bearings; the clutch flywheel and the crankshaft and the clutch flywheel and the crankcase are respectively sealed in the axial direction, so that the isolation of lubricating oil in the crankcase is realized, and the lubricating oil in the crankcase is favorably prevented from leaking into the auxiliary crankcase in the axial direction; meanwhile, the dry clutch is axially moved and assembled towards the shaft base side, so that the axial length of the crankshaft and the length of the box body are favorably shortened, the structure of the engine is compact, and the volume and the light weight of the engine are favorably reduced; the motor tricycle is favorable for greatly improving the running stability of the motor tricycle, saving energy consumption and improving the use safety.

Drawings

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

fig. 1 is a schematic sectional structure of the present invention;

FIG. 2 is a diagram of the engine assembly of the present invention;

fig. 3 is a schematic structural view of the engine assembly of the present invention installed on a motor tricycle.

Detailed Description

Fig. 1 is the schematic view of the cross-sectional structure of the present invention, fig. 2 is the overall view of the engine assembly of the present invention, as shown in the figure: the engine assembly of the embodiment comprises an engine body, a crankcase assembly and an auxiliary box body assembly; the crankcase assembly comprises a crankcase body 2 and a crankshaft 1, and a shaft seat hole I11 is coaxially formed in the shaft end of the crankshaft 1, which extends out of the crankcase body 2; the crankshaft box body 2 is provided with a shaft seat hole II for the crankshaft 1 to pass through, and the shaft seat hole II is not marked in the figure; the direct support of a crankshaft bearing 12 is formed by a clutch flywheel 8 (sleeved outside the crankshaft 1) of the dry clutch 6 arranged in the auxiliary box body 5, so that the axial forward movement (towards the side of the crankshaft box body 2) of the installation position of the dry clutch 6 is facilitated, the axial size of the engine is shortened, and the structure of the engine is more compact to avoid space waste;

the auxiliary box assembly comprises an auxiliary box body 5 and an output shaft 4, one end of the output shaft 4 is rotatably matched and coaxially supported in a shaft seat hole I11 by 1, and the other end of the output shaft 4 is rotatably matched and supported in the auxiliary box body 5 for outputting power; the mutual support between the output shaft 4 and the crankshaft 1 is facilitated, the cantilever stress of the output shaft 4 is changed into the support stress, the stress borne by the shaft section of the output shaft 4 is reduced, the service life of the output shaft 4 is prolonged, meanwhile, the stress of the bearing 7 at the other end of the output shaft 4 is reduced by sharing part of load, and the service life of the bearing 7 at the other end of the output shaft 4 is prolonged; and the connecting length of the crankshaft 1 and the output shaft 4 is favorably shortened, the total length of an engine box is shortened, the volume of the engine is reduced, the lightweight of the engine is favorably realized, and the structure is compact.

In this embodiment, the crankcase assembly further includes a dry clutch 6 for inputting the power of the crankshaft 1, the auxiliary case 5 is fixedly connected to the crankcase 2, the dry clutch 6 is located in the auxiliary case 5, and the dry clutch 6 is used for outputting or disconnecting the input power of the crankshaft 1 to the output shaft 4; the dry clutch 6 is protected and the safety during high-speed operation is improved.

In this embodiment, the output shaft 4 is coaxially supported in the shaft seat hole I11 by the rotational fit of the needle bearing 3; the needle bearing 3 is assembled in the shaft seat hole I11 in an interference manner and is coaxially supported with the crankshaft 1 through the needle bearing 3; the needle roller of the needle roller bearing 3 has high hardness and high wear resistance and can rotate, so that the support of the output shaft 4 and the crankshaft 1 is facilitated; the dual functions of coaxial rotation and support of the crankshaft 1 and the output shaft 4 are facilitated.

In the present embodiment, the dry clutch 6 has a clutch flywheel 8; the clutch flywheel 8 is arranged on the crankshaft 1 in a transmission fit manner and is provided with a flywheel shaft neck; the flywheel shaft neck is one end of the clutch flywheel close to the side of the crankcase, and the flywheel shaft neck is not marked in the figure; the inner circle of the flywheel journal and the crankshaft 1 form sealing in the axial direction, and the outer circle and a shaft seat hole II arranged in the crankshaft box body 2 form rotary sealing in the axial direction; the lubricating oil in the crankcase body 2 is prevented from leaking to the area of the auxiliary case body 5 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.

In this embodiment, an annular groove is formed in the outer circle of the crankshaft 1 corresponding to the flywheel journal, and is used for accommodating a sealing element 9 and forming axial sealing between the crankshaft 1 and the clutch flywheel 8 journal; an annular groove can be arranged on the inner circle of the shaft hole of the shaft neck of the clutch flywheel 8, but for convenience of processing and assembly, the annular groove is preferably arranged on the outer circle of the crankshaft 1; an annular sealing element 9 is arranged in the annular groove to form axial sealing between the crankshaft 1 and the clutch flywheel 8 after the crankshaft and the clutch flywheel are correspondingly assembled; the annular groove is not marked in the figures.

In this embodiment, the sealing member 9 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 is arranged on the excircle of the crankshaft 1, the shaft shoulder of the crankshaft 1 is arranged at the outer end of the sealing part (namely the arrangement part of the annular groove) between the crankshaft 1 and the clutch flywheel 8 in the axial direction, and the outer end is the end close to the dry clutch 6 side; one end of the output shaft 4, which is far away from the crankshaft 1, is supported on the auxiliary box body 5 through a bearing 7 in a rotating fit manner for outputting power; do benefit to right output shaft 4's support improves output shaft 4's life-span, and does benefit to power take off.

In this embodiment, the outer circle of the crankshaft 1 is provided with a plurality of axial splines along the circumferential direction, and the inner circle of the shaft hole of the clutch flywheel 8 is correspondingly provided with a plurality of key slots matched with the splines for radial positioning and transmission matching between the clutch flywheel 8 and the crankshaft 1; the multiple axial splines 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 is taken as a demarcation point, and the shaft diameter of the crankshaft 1 close to the side of the dry clutch 6 is smaller), the inner circle of the shaft hole of the clutch flywheel 8 (the inner circle of the shaft hole of the clutch flywheel 8 corresponding to the side with the smaller shaft diameter of the crankshaft 1 and the inner circle of the non-axial sunk 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 8 and form meshing transmission with the multiple splines arranged on the outer circle of the crankshaft, and the matching of the multiple splines and the multiple key grooves is favorable for forming the power transmission of the crankshaft 1 to the clutch flywheel 8 and transmitting the power to the dry clutch 6 through the clutch flywheel 8, so that the power is; meanwhile, the radial positioning and the axial positioning between the crankshaft 1 and the clutch flywheel 8 are facilitated; the plurality of key grooves extend towards the side of the dry clutch 6, so that the matching installation of the plurality of key grooves arranged in the inner circle of the clutch flywheel 8 and the plurality of splines is facilitated; the plurality of splines and keyways are not labeled in the figures.

In the embodiment, the axle journal end of the flywheel 8 is abutted against the axial end part of the crankshaft bearing 12; the axial length of the crankshaft 1 is favorably shortened, the axial forward movement (towards the side of the crankcase body 2) of the installation position of the dry clutch 6 is favorably realized, and the axial size of the engine is shortened, so that the structure of the engine is more compact, and the space waste is avoided; an annular boss is arranged on the outer circle of the flywheel 8 far away from the axle neck end, and the power input end of the dry clutch 6 is sleeved outside the clutch flywheel 8 and forms axial support against the annular boss; the structural stability of the engine during operation is improved; the radial annular boss is not marked in the figure;

the annular boss of the clutch flywheel 8 is fixedly connected with the power input end of the dry clutch 6 through a connecting piece, and the output shaft 4 is driven to rotate through the combination of the friction disc 13 to output power; the annular boss and the power input end of the dry clutch 6 are axially provided with mounting holes for the penetration and fixation of the connecting piece; the selection of the connecting piece belongs to the prior art, such as a bolt and the like, and is not described herein again; the mounting holes and the connecting pieces are not marked in the figures.

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. An engine assembly, characterized in that: comprises an engine body, a crankcase assembly and an auxiliary box body assembly; the crankcase assembly comprises a crankcase body and a crankshaft, and a shaft seat hole I is coaxially formed in the shaft end of the crankshaft, which extends out of the crankcase body;

the auxiliary box body assembly comprises an auxiliary box body and an output shaft, one end of the output shaft is supported in the shaft seat hole I in a rotating fit and coaxial mode, and the other end of the output shaft is supported in the auxiliary box body in a rotating fit mode and used for outputting power.

2. The engine assembly of claim 1, wherein: the crankcase assembly further comprises a dry clutch used for inputting the power of the crankshaft, the auxiliary box body is fixedly connected with the crankcase body, the dry clutch is located in the auxiliary box body, and the dry clutch is used for outputting the input power of the crankshaft to an output shaft or disconnecting the input power of the crankshaft.

3. The engine assembly of claim 2, wherein: the output shaft is coaxially supported in the shaft seat hole I through the rotational fit of the needle bearing.

4. The engine assembly of claim 2, wherein: the dry clutch has 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 journal and the crankshaft form sealing in the axial direction, and the outer circle and the shaft seat hole II arranged in the crankshaft box body form rotary sealing in the axial direction.

5. The engine assembly of claim 4, 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.

6. The engine assembly of claim 5, wherein: the sealing element is an O-shaped sealing ring; and one end of the output shaft, which is far away from the crankshaft, is supported on the auxiliary box body through a bearing in a rotating fit manner and is used for outputting power.

7. The engine assembly of claim 4, 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.

8. The engine assembly of claim 4, wherein: the flywheel journal end is butted against the axial end part of the crankshaft bearing; an annular boss is arranged on the outer circle of the flywheel far away from the axle neck end, and the power input end of the dry clutch is sleeved outside the clutch flywheel and forms axial support against the annular boss;

the annular boss of the clutch flywheel is fixedly connected with the power input end of the dry clutch through a connecting piece, and the output shaft is driven to output power through the combination of the friction disc.

9. A motor tricycle, characterized in that: the engine assembly 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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