CN213419227U

CN213419227U - Crankshaft assembly mounting structure of extended-range gasoline engine

Info

Publication number: CN213419227U
Application number: CN202022103032.8U
Authority: CN
Inventors: 李汉勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-06-11
Anticipated expiration: 2030-09-23

Abstract

The utility model discloses a crankshaft assembly mounting structure of an extended-range gasoline engine, which comprises a crankshaft assembly, a box body assembly, an outer support frame, a first bearing, a first oil seal and an oil seal pressing plate; the crankshaft assembly is arranged inside the box body assembly, the front end of the crankshaft assembly extends forwards out of the box body assembly, the outer support frame is connected with the front end of the box body assembly, a space for accommodating a magneto is arranged between the outer support frame and the box body assembly, a bearing installation cavity is arranged in the middle of the outer support frame, the opening direction of the bearing installation cavity faces backwards, the outer ring of the first bearing is fixed in the bearing installation cavity, and the outer ring of the first bearing is sleeved at the front end of the crankshaft assembly; the oil seal pressing plate seals an opening of the bearing installation cavity. The utility model provides a pair of increase form gasoline engine's crankshaft assembly mounting structure can provide the support for crankshaft assembly's front end.

Description

Crankshaft assembly mounting structure of extended-range gasoline engine

Technical Field

The utility model relates to an increase form engine technology field, concretely relates to increase form gasoline engine's crankshaft assembly mounting structure.

Background

With the great promotion and development of new energy power in China, and the technical bottleneck that the new energy power cannot be rapidly promoted due to the problem of battery endurance at the present stage, the extended-range engine is used as an intermediate product of the new energy power and the power of the traditional fuel engine, and the purpose is to solve the problem that after the battery of a new energy vehicle is exhausted, the power can be generated by the extended-range engine to be used by the vehicle, so that various embarrassing situations caused by insufficient endurance of the vehicle are avoided. The new energy vehicles on the market are various in varieties, the power requirement on the range-extending engine is extremely high, particularly large new energy vehicles can meet the use requirement of the large-power range-extending engine only by being matched with the large-power range-extending engine, and the front end of the existing crankshaft assembly is not provided with a reasonable support structure, so that the crankshaft assembly is easily broken by the centrifugal force generated by a magneto rotor rotating at a high speed.

Disclosure of Invention

In view of this, the utility model aims at overcoming the defect among the prior art, provide a crank assembly mounting structure of extended range gasoline engine, can provide the support for the front end of crank assembly, simple structure, material saving, light in weight can guarantee the lubricating property of support part simultaneously, prevents to produce the influence to the rotation of crank assembly.

The utility model discloses a crankshaft assembly mounting structure of extended range gasoline engine, which comprises a crankshaft assembly, a box body assembly, an outer support frame, a first bearing, a first oil seal and an oil seal pressing plate; the crankshaft assembly is arranged inside the box body assembly, the front end of the crankshaft assembly extends forwards out of the box body assembly, the outer support frame is connected with the front end of the box body assembly, a space for accommodating a magneto is arranged between the outer support frame and the box body assembly, a bearing installation cavity is arranged in the middle of the outer support frame, the opening direction of the bearing installation cavity faces backwards, the outer ring of the first bearing is fixed in the bearing installation cavity, and the outer ring of the first bearing is sleeved at the front end of the crankshaft assembly; the oil seal pressing plate seals an opening of the bearing installation cavity, a through hole for the front end of the crankshaft assembly to penetrate is formed in the middle of the oil seal pressing plate, and the first oil seal is arranged between the first bearing and the oil seal pressing plate.

Further, the outer lane of first bearing with the cooperation in bearing installation cavity is interference fit, first oil blanket with the cooperation in bearing installation cavity is clearance fit.

Further, the crankshaft assembly comprises a box body connecting shaft and a rotor connecting shaft arranged at the front end of the box body connecting shaft, and the box body connecting shaft is connected with the box body assembly in a rotatable mode; the box body assembly is characterized by further comprising a second oil seal and a plurality of second bearings, wherein outer rings of the second bearings are fixed inside the box body assembly, inner rings of the second bearings are sleeved on the box body connecting shaft, and the second oil seal is arranged on the front side of the second bearings; the inside of box assembly is provided with oil blanket mounting hole and bearing mounting hole, the second oil blanket with the cooperation in oil blanket mounting hole is interference fit, and is a plurality of the outer lane of second bearing with the cooperation in bearing mounting hole is interference fit.

Furthermore, the outer support frame comprises a support frame main body and N connecting columns which protrude backwards from the support frame main body, and the N connecting columns are arranged at intervals along the circumferential direction; n the spliced pole all includes connecting portion and the bolt installation department that sets gradually from the front to the back, the length direction of connecting portion is along the axial, the bolt installation department pass through the bolt with the box assembly is connected.

Further, the device also comprises a hollow positioning pin; bolt through holes are formed in the N bolt mounting parts, and bolt mounting holes are formed in the positions, corresponding to the bolt through holes, of the box body assembly; the bolt mounting hole comprises a front unthreaded hole section and a rear thread section of which the inner diameter is smaller than the front unthreaded hole section, the rear section of the bolt through hole and the front unthreaded hole section form a positioning cavity, the outer diameter of the hollow positioning pin is the same as the inner diameter of the positioning cavity, and the rear thread section is in threaded fit with the bolt.

Furthermore, the connecting part is provided with a first reinforcing rib which protrudes outwards from the connecting part along the radial direction, and the protruding height of the first reinforcing rib increases progressively from front to back.

Further, the support frame main part is including setting up the central part at the middle part of support frame main part, the bearing installation cavity sets up on the central part, the support frame main part still includes N connection umbrella bone portion, and is N connect umbrella bone portion and set up along circumference interval, and is N the head end of connecting umbrella bone portion all with the central part is connected, and is N the tail end of connecting umbrella bone portion is respectively with N the spliced pole is connected.

Further, the support frame main body further comprises an outer reinforcing ring, and the outer reinforcing ring is connected with the N connecting columns simultaneously.

Furthermore, the support frame main body further comprises N reinforcing rib parts, the N reinforcing rib parts are arranged at intervals along the circumferential direction, the connecting rib parts and the reinforcing rib parts are alternately arranged along the circumferential direction, the head ends of the N reinforcing rib parts are all connected with the central part, and the tail ends of the N reinforcing rib parts are all connected with the outer reinforcing ring.

Further, the support frame main part still includes interior beaded finish, interior beaded finish simultaneously with N the middle part of connecting rib portion is with N the middle part of strengthening rib portion is connected.

The utility model has the advantages that: the utility model discloses an increase form gasoline engine's crankshaft assembly mounting structure can provide the support for crankshaft assembly's front end, simple structure, and material saving, light in weight can guarantee the lubricating property of support part simultaneously, prevents to produce the influence to crankshaft assembly's rotation.

Drawings

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

fig. 1 is a first schematic structural diagram of the present invention;

fig. 2 is a schematic view of a partial structure of a junction between the crankshaft assembly and the first bearing according to the present invention;

FIG. 3 is an enlarged schematic view of FIG. 1 at A;

fig. 4 is a schematic structural diagram of the present invention.

Description of reference numerals: 1-crankshaft assembly, 101-box connecting shaft, 102-rotor connecting shaft, 2-box assembly, 3-outer support frame, 31-support frame main body, 311-central part, 312-connecting rib part, 313-outer reinforcing ring, 314-reinforcing rib part, 315-inner reinforcing ring, 32-connecting column, 321-connecting part, 322-first reinforcing rib, 323-bolt mounting part, 4-bolt, 51-hollow positioning pin, 52-positioning cavity, 6-first bearing, 7-first oil seal, 8-oil seal pressing plate, 9-magneto, 10-second oil seal and 11-second bearing.

Detailed Description

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

As shown in fig. 1 to 4, the crankshaft assembly mounting structure of the extended range gasoline engine in the present embodiment includes a crankshaft assembly 1, a case assembly 2, an outer support frame 3, a first bearing 6, a first oil seal 7 and an oil seal pressing plate 8; the crankshaft assembly 1 is arranged inside the box assembly 2, the front end of the crankshaft assembly 1 extends forwards out of the box assembly 2, the outer support frame 3 is connected with the front end of the box assembly 2, a space for accommodating a magneto 9 is arranged between the outer support frame 3 and the box assembly 2, a bearing installation cavity is arranged in the middle of the outer support frame 3, the opening direction of the bearing installation cavity faces backwards, the outer ring of the first bearing 6 is fixed in the bearing installation cavity, and the outer ring of the first bearing 6 is sleeved at the front end of the rotor connecting shaft 102; the oil seal pressing plate 8 is used for sealing an opening of the bearing installation cavity, a through hole for the rotor installation shaft to pass through is formed in the middle of the oil seal pressing plate 8, and the first oil seal 7 is arranged between the first bearing 6 and the oil seal pressing plate 8. The bearing installation cavity and the first bearing 6 can provide support for the front end of the crankshaft assembly 1, the structure is simple, meanwhile, the oil seal pressing plate 8 and the oil seal can guarantee the lubricating performance of the first bearing 6 and the front end of the crankshaft assembly 1, the influence on the rotation of the crankshaft assembly 1 is prevented, after the oil seal pressing plate 8 and the oil seal provide protection for the parts needing lubrication, the outer support frame 3 does not need to be in sealing connection with the box assembly 2, the outer support frame 3 can adopt a simple hollow structure, the weight of the outer support frame 3 is reduced, the machining precision requirement of the outer support frame 3 is reduced, the assembly difficulty is also reduced, and therefore the purposes of cost reduction and efficiency improvement are achieved.

In this embodiment, the outer ring of the first bearing 6 is in interference fit with the bearing installation cavity, and the first oil seal 7 is in clearance fit with the bearing installation cavity. Because the first bearing 6 and the first oil seal 7 are both arranged in the bearing installation cavity, and the first bearing 6 is firstly arranged and then the first oil seal 7 is arranged during installation, the first oil seal 7 is in clearance fit with the bearing installation cavity, so that the first oil seal 7 is prevented from influencing the stability of the first bearing 6 when being arranged in the bearing installation cavity, and the outer ring of the first bearing 6 is ensured to be stably connected with the bearing installation cavity; simultaneously, in order to prevent that first oil blanket 7 is not hard up to break away from, the utility model discloses still fix a position first oil blanket 7 through oil seal clamp plate 8, oil seal clamp plate 8 can be fixed on outer support frame 3 through standard fastener (like the screw).

In this embodiment, the crankshaft assembly 1 includes a case connecting shaft 101 and a rotor connecting shaft 102 disposed at a front end of the case connecting shaft 101, and the case connecting shaft 101 is rotatably connected to the case assembly 2; the oil seal structure further comprises a second oil seal 10 and a plurality of second bearings 11, wherein outer rings of the second bearings 11 are fixed inside the box body assembly 2, inner rings of the second bearings 11 are sleeved on the box body connecting shaft 101, and the second oil seal 10 is arranged on the front side of the second bearings 11; the inside of box assembly 2 is provided with oil blanket mounting hole and bearing mounting hole, second oil blanket 10 with the cooperation in oil blanket mounting hole is interference fit, and is a plurality of the outer lane of second bearing 11 with the cooperation in bearing mounting hole is interference fit. The second oil seal 10 is provided between the case connecting shaft 101 and the oil seal mounting hole, and enables the front end of the case assembly 2 not to communicate with the outside. Because the second oil blanket 10 and the second bearing 11 are installed on different holes to the second oil blanket 10 and the second bearing 11 do not influence each other during the installation, consequently all can adopt interference fit to be connected with corresponding mounting hole, simple installation, and is with low costs.

In this embodiment, the outer support frame 3 includes a support frame main body 31 and N connecting columns 32 protruding backward from the support frame main body 31, and the N connecting columns 32 are circumferentially arranged at intervals; n spliced pole 32 all includes connecting portion 321 and the bolt installation department 323 that sets gradually from the front to the back, the length direction of connecting portion 321 is along the axial, bolt installation department 323 through bolt 4 with box assembly 2 is connected. The case connection shaft 101, the rotor connection shaft 102, and the first bearing 6 are coaxial, and unless otherwise specified, the axial direction in the present application refers to the same direction as the axis, and the radial direction refers to a direction perpendicular to the axis. N.gtoreq.3, N is preferably 3. The length of the connecting portion 321 is such that a space for accommodating the magneto 9 is formed between the support main body 31 and the case assembly 2.

In this embodiment, a hollow positioning pin 51 is further included; bolt through holes are formed in the N bolt mounting portions 323, and bolt mounting holes are formed in the positions, corresponding to the bolt through holes, of the box body assembly 2; the bolt mounting hole comprises a front unthreaded hole section and a rear thread section of which the inner diameter is smaller than the front unthreaded hole section, the rear section of the bolt through hole and the front unthreaded hole section form a positioning cavity 52, the outer diameter of the hollow positioning pin 51 is the same as the inner diameter of the positioning cavity 52, and the rear thread section is in threaded fit with the bolt 4. When the crankshaft assembly 1 is installed, the number of the hollow positioning pins 51 is at least two, and the hollow positioning pins 51 are installed in the positioning cavities 52, so that the concentricity of the first bearing 6 on the outer support frame 3 and the crankshaft in matched installation is ensured, and the influence on the rotation of the crankshaft assembly 1 due to eccentricity is prevented.

In this embodiment, the connecting portion 321 is provided with a first reinforcing rib 322 protruding from the connecting portion 321 radially outward, and the protruding height of the first reinforcing rib 322 increases from front to back. The first reinforcing rib 322 serves to increase the strength of the connection portion 321 and prevent the connection portion 321 from being broken.

In this embodiment, the support frame main body 31 includes the central part 311 that sets up in the middle part of the support frame main body 31, the bearing installation cavity sets up on the central part 311, the support frame main body 31 still includes N and connects rib portion 312, N connect rib portion 312 and set up along circumference interval, N the head end of connecting rib portion 312 all with the central part 311 is connected, N the tail end of connecting rib portion 312 respectively with N spliced pole 32 is connected. In the present embodiment, three connection ribs 312 are provided at equal intervals in the circumferential direction, the angle between two adjacent connection ribs 312 is 120 °, and the connection ribs 312 connect the central portion 311 and the three connection posts 32 into a whole.

In this embodiment, the support frame main body 31 further includes an external reinforcing ring 313, and the external reinforcing ring 313 is connected to the N connecting posts 32 at the same time. The reinforcement ring prevents the relative positions of the three connecting posts 32 from changing.

In this embodiment, the support frame main body 31 further includes N reinforcing rib portions 314, the N reinforcing rib portions 314 are arranged at intervals in the circumferential direction, the connecting rib portions 312 and the reinforcing rib portions 314 are alternately arranged in the circumferential direction, the head ends of the N reinforcing rib portions 314 are all connected to the central portion 311, and the tail ends of the N reinforcing rib portions 314 are all connected to the outer reinforcing ring 313. The three reinforcing rib parts 314 are also arranged at equal intervals along the circumferential direction, the included angle between two adjacent reinforcing rib parts 314 is 120 degrees, the connecting rib parts 312 and the reinforcing rib parts 314 are alternately arranged along the circumferential direction, and the included angle between any one reinforcing rib part 314 and the connecting rib part 312 adjacent to the reinforcing rib part 314 is 60 degrees. The reinforcing rib portion 314 can connect the central portion 311 and the reinforcing ring as a single body, thereby increasing the overall strength of the support frame body 31.

In this embodiment, the support frame main body 31 further includes an inner reinforcing ring 315, and the inner reinforcing ring 315 is connected to the middle portions of the N connecting rib portions 312 and the middle portions of the N reinforcing rib portions 314 at the same time. The inner reinforcement ring 315 can further increase the overall strength of the support frame body 31. The inner reinforcement ring 315, the N connecting ribs 312 and the N reinforcing ribs 314 are provided with second reinforcing ribs protruding forward.

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

1. The utility model provides an increase form gasoline engine's crankshaft assembly mounting structure which characterized in that: the device comprises a crankshaft assembly (1), a box body assembly (2), an outer support frame (3), a first bearing (6), a first oil seal (7) and an oil seal pressing plate (8); the crankshaft assembly (1) is arranged inside the box body assembly (2), the front end of the crankshaft assembly (1) extends forwards out of the box body assembly (2), the outer support frame (3) is connected with the front end of the box body assembly (2), a space for accommodating a magneto (9) is arranged between the outer support frame (3) and the box body assembly (2), a bearing installation cavity is arranged in the middle of the outer support frame (3), the opening direction of the bearing installation cavity faces backwards, the outer ring of the first bearing (6) is fixed in the bearing installation cavity, and the outer ring of the first bearing (6) is sleeved at the front end of the crankshaft assembly (1); the oil seal pressing plate (8) is used for sealing an opening of the bearing installation cavity, a through hole used for allowing the front end of the crankshaft assembly (1) to penetrate is formed in the middle of the oil seal pressing plate (8), and the first oil seal (7) is arranged between the first bearing (6) and the oil seal pressing plate (8).

2. The crankshaft assembly mounting structure of an extended range gasoline engine according to claim 1, characterized in that: the outer ring of the first bearing (6) is in interference fit with the bearing installation cavity, and the first oil seal (7) is in clearance fit with the bearing installation cavity.

3. The crankshaft assembly mounting structure of an extended range gasoline engine according to claim 2, characterized in that: the crankshaft assembly (1) comprises a box body connecting shaft (101) and a rotor connecting shaft (102) arranged at the front end of the box body connecting shaft (101), and the box body connecting shaft (101) is connected with the box body assembly (2) in a rotatable mode; the oil seal structure is characterized by further comprising a second oil seal (10) and a plurality of second bearings (11), wherein outer rings of the second bearings (11) are fixed inside the box body assembly (2), inner rings of the second bearings (11) are sleeved on the box body connecting shaft (101), and the second oil seal (10) is arranged on the front side of the second bearings (11); the inside of box assembly (2) is provided with oil blanket mounting hole and bearing mounting hole, second oil blanket (10) with the cooperation in oil blanket mounting hole is interference fit, and is a plurality of the outer lane of second bearing (11) with the cooperation in bearing mounting hole is interference fit.

4. The crankshaft assembly mounting structure of an extended range gasoline engine according to claim 1, characterized in that: the outer support frame (3) comprises a support frame main body (31) and N connecting columns (32) protruding backwards out of the support frame main body (31), and the N connecting columns (32) are arranged at intervals along the circumferential direction; n spliced pole (32) all include connecting portion (321) and bolt installation department (323) that set gradually from the front to the back, the length direction of connecting portion (321) is along the axial, bolt installation department (323) through bolt (4) with box assembly (2) are connected.

5. The crankshaft assembly mounting structure of an extended range gasoline engine according to claim 4, characterized in that: also comprises a hollow positioning pin (51); bolt through holes are formed in the N bolt mounting portions (323), and bolt mounting holes are formed in the positions, corresponding to the bolt through holes, of the box body assembly (2); the bolt mounting hole comprises a front unthreaded hole section and a rear threaded section of which the inner diameter is smaller than the front unthreaded hole section, the rear section of the bolt through hole and the front unthreaded hole section form a positioning cavity (52), the outer diameter of the hollow positioning pin (51) is the same as the inner diameter of the positioning cavity (52), and the rear threaded section is in threaded fit with the bolt (4).

6. The crankshaft assembly mounting structure of an extended range gasoline engine according to claim 4, characterized in that: the connecting part (321) is provided with a first reinforcing rib (322) which protrudes outwards from the connecting part (321) along the radial direction, and the protruding height of the first reinforcing rib (322) increases progressively from front to back.

7. The crankshaft assembly mounting structure of an extended range gasoline engine according to claim 4, characterized in that: support frame main part (31) is including setting up central part (311) at the middle part of support frame main part (31), the bearing installation cavity sets up on central part (311), support frame main part (31) still includes N and connects rib portion (312), and N connect rib portion (312) along circumference interval setting, N the head end of connecting rib portion (312) all with central part (311) is connected, N the tail end of connecting rib portion (312) is respectively with N the spliced pole (32) is connected.

8. The crankshaft assembly mounting structure of an extended range gasoline engine according to claim 7, characterized in that: the support frame main body (31) further comprises an outer reinforcing ring (313), and the outer reinforcing ring (313) is simultaneously connected with the N connecting columns (32).

9. The crankshaft assembly mounting structure of an extended range gasoline engine according to claim 8, characterized in that: the support frame main body (31) further comprises N reinforcing rib parts (314), the N reinforcing rib parts (314) are arranged at intervals along the circumferential direction, the connecting rib parts (312) and the reinforcing rib parts (314) are alternately arranged along the circumferential direction, the head ends of the N reinforcing rib parts (314) are connected with the central part (311), and the tail ends of the N reinforcing rib parts (314) are connected with the outer reinforcing ring (313).

10. The crankshaft assembly mounting structure of an extended range gasoline engine according to claim 9, characterized in that: the support frame main body (31) further comprises an inner reinforcing ring (315), wherein the inner reinforcing ring (315) is connected with N middle parts of the connecting rib parts (312) and N middle parts of the reinforcing rib parts (314) at the same time.