CN212838928U - Split assembled motorcycle crankshaft - Google Patents
Split assembled motorcycle crankshaft Download PDFInfo
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- CN212838928U CN212838928U CN202021492514.0U CN202021492514U CN212838928U CN 212838928 U CN212838928 U CN 212838928U CN 202021492514 U CN202021492514 U CN 202021492514U CN 212838928 U CN212838928 U CN 212838928U
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Abstract
The utility model discloses a split-type assembled motorcycle crankshaft, which comprises a left crank and a right crank, wherein the left crank comprises a left crank handle part and a left crank rod part which are arranged in a split manner, and the right crank comprises a right crank handle part and a right crank rod part which are arranged in a split manner; one end of the left crank rod part facing the left crank handle part is sleeved with a timing gear which rotates synchronously with the left crank rod part; a left jack is arranged on one side of the left crank handle part facing the left crank rod part, and a left plug matched with the left jack is arranged on the left crank rod part; a transmission gear integrally formed with the right crank rod part is arranged on the right crank rod part, a right insertion hole is formed in one side, facing the right crank rod part, of the right crank rod part, and a right plug matched with the right insertion hole is arranged on the right crank rod part; an assembly pin column is arranged on the handle part of the left crank; the handle part of the right crank is provided with an assembling pin hole matched with the assembling pin column; and a circumferential positioning structure and an axial limiting structure for preventing the assembling pin from being drawn out from the assembling pin hole are arranged between the assembling pin and the assembling pin hole.
Description
Technical Field
The utility model relates to a bent axle, specific be a components of a whole that can function independently assembled motorcycle bent axle.
Background
Fig. 1 is a schematic diagram of a conventional crankshaft. This bent axle includes left crank 1 and right crank 2, and left crank 1 includes left crank stalk portion 3 and left crank pole portion 4, and right crank 2 includes right crank stalk portion 5 and right crank stalk portion 6, corresponds between left crank stalk portion 3 and the right crank stalk portion 5 and is equipped with pinhole 7,8, and 9 interference fit of crank pin install two pinhole 7,8 in and connect as an organic wholely with left crank 1 and right crank 2. Although the existing crankshaft can meet the use requirement, after long-time use, the crank connecting rod 10 and the needle bearing 11 may be excessively worn due to wear and the like, but because the crank pin 9 and the two pin holes 7 and 8 are in interference fit, if the crank pin 9 needs to be disassembled, the left crank 1 or the right crank 2 needs to be disassembled from the crank pin 9 in a destructive mode, so that the pin holes 7 and 8 are easily deformed, and the requirement of interference fit between the newly replaced crank pin 9 and the pin holes 7 and 8 cannot be met any more.
In addition, in the existing crank, the left crank 1 and the right crank 2 both adopt an integrated structure, that is, the left crank handle part 3 and the left crank rod part 4 are integrated, and the right crank handle part 5 and the right crank rod part 6 are integrated. Although the existing crank can meet the use requirements, the following defects still exist: 1) the timing gear 12 is arranged on the left crank rod part 4 in an interference fit manner, special press-fitting equipment is needed, and the assembly is difficult; 2) a transmission gear 13 integrally formed with the right crank rod part 6 is arranged on the right crank rod part, and the transmission gear 13 is processed by a special broaching machine due to the fact that the right crank is of a special-shaped structure; 3) drilling holes are needed in the crank rod part 4 and the right crank rod part 6, and due to the interference of the left crank handle part 3 and the right crank handle part 5, a universal shaft part drilling device cannot be adopted, and a special clamp needs to be designed.
Disclosure of Invention
In view of this, the utility model aims at providing a components of a whole that can function independently assembled motorcycle bent axle adopts split type structure, and the manufacturing of being convenient for, and have the assembly more simple and convenient and can dismantle the advantage of maintaining.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a split-assembly type motorcycle crankshaft comprises a left crank and a right crank, wherein the left crank comprises a left crank handle part and a left crank rod part, and the right crank comprises a right crank handle part and a right crank rod part;
the left crank handle part and the left crank rod part are arranged in a split manner, and one end, facing the left crank handle part, of the left crank rod part is sleeved with a timing gear which rotates synchronously with the left crank handle part; a left jack is arranged on one side, facing the left crank rod part, of the left crank handle part, and a left plug matched with the left jack is arranged on the left crank rod part;
the right crank handle part and the right crank rod part are arranged in a split mode, a transmission gear integrally formed with the right crank rod part is arranged on the right crank rod part, a right insertion hole is formed in one side, facing the right crank rod part, of the right crank handle part, and a right plug matched with the right insertion hole is arranged on the right crank rod part;
an assembly pin column is arranged on the left crank handle part, and the assembly pin column and the left crank handle part are integrally arranged and are parallel to the left crank rod part; the handle part of the right crank is provided with an assembling pin hole matched with the assembling pin column; the assembling pin column is detachably assembled in the assembling pin hole, and a crank connecting rod positioned between the left crank handle part and the right crank handle part is sleeved on the assembling pin column; and a circumferential positioning structure and an axial limiting structure for preventing the assembling pin from being drawn out of the assembling pin hole are arranged between the assembling pin and the assembling pin hole.
Further, the assembling pin column comprises a large-diameter section and a small-diameter section which are coaxially arranged, the outer diameter of the large-diameter section is larger than that of the small-diameter section, the assembling pin hole is matched with the small-diameter section, and the crank connecting rod is sleeved on the large-diameter section; and a needle bearing is arranged between the crank connecting rod and the large-diameter section, and two ends of the needle bearing are respectively in limit fit with the left crank handle part and the right crank handle part.
Further, circumference location structure is including setting up on the assembly pin hole inner wall and along the constant head tank that its generating line direction extends with set up and be in on the minor diameter section periphery wall with constant head tank complex locating piece.
Furthermore, the axial limiting structure comprises a radial hole which is arranged in the handle part of the right crank and is vertical to the axis of the assembling pin hole, a radial limiting hole is correspondingly arranged on the assembling pin column and corresponds to the radial hole, and a limiting element which is in limiting fit with the radial limiting hole is arranged in the radial hole.
Further, the radial hole comprises a radial large-diameter section and a radial small-diameter section which are coaxially arranged, the radial large-diameter section is located on one side of the radial small-diameter section, the inner diameter of the radial large-diameter section is larger than that of the radial small-diameter section, and the inner diameter of the radial limiting hole is equal to that of the radial small-diameter section.
Furthermore, an internal thread is arranged in the radial large-diameter section, the limiting element comprises a thread section in threaded fit with the radial large-diameter section and a smooth section in threaded fit with the radial small-diameter section, and the smooth section extends into the radial limiting hole to be in limiting fit with the assembling pin column.
Furthermore, a counter bore is formed in the radially outward end of the radial large-diameter section, and a limiting head located in the counter bore is arranged at the end, back to the smooth section, of the thread section.
Furthermore, the left jack and the right jack are internally provided with an internal spline respectively, and the left plug and the right plug are provided with an external spline engaged with the internal spline respectively.
Further, left crank pole portion includes pole portion major diameter section and is located pole portion major diameter section faces the pole portion minor diameter section of the one end of left crank stalk portion, the external diameter of pole portion minor diameter section is less than the external diameter of pole portion major diameter section and form the shaft shoulder between pole portion major diameter section and the pole portion minor diameter section, the timing gear suit is in on the pole portion minor diameter section and fixed the shaft shoulder with between the left crank stalk portion.
Further, the right crank with be equipped with lubricated oil duct system between the assembly round pin post, lubricated oil duct system is including setting up central through-hole in the right crank pole portion, setting are in the blind hole at right side jack hole bottom, setting are in first inclined hole in the right crank stalk portion, setting are in intercommunicating pore, setting in the assembly round pin post the intercommunicating pore lateral wall with the second inclined hole and the setting of first inclined hole intercommunication are in the radial oilhole of intercommunicating pore lateral wall, the one end of first inclined hole with the blind hole communicates with each other, other end port is located on the inner wall of assembly round pin hole, the right side plug with be equipped with one at least sealing washer between the jack of the right side.
The beneficial effects of the utility model reside in that:
the split assembly type motorcycle crankshaft of the utility model has the advantages that the left crank handle part and the left crank rod part are arranged in a split way, so that the timing gear can be directly installed on the left crank rod part without adopting special press-fitting equipment for assembly; the right crank handle part and the right crank rod part are arranged in a split manner, so that a transmission gear can be directly machined on the right crank rod part without adopting special machining equipment; in conclusion, the split assembled motorcycle crankshaft of the utility model is more convenient to assemble, and can be processed by adopting general equipment during processing, thereby effectively reducing the equipment investment;
through set up the assembly round pin post rather than an organic whole on left crank stalk portion, and will assemble the round pin post and directly cooperate with the assembly pinhole, utilize circumferential location structure to realize the circumferential location between assembly round pin post and the assembly pinhole, and then realize left crank and right crank's circumferential location, and utilize axial limit structure to prevent that the assembly round pin post from being taken out by axial force in the assembly pinhole, so, can satisfy the assembly and the operation requirement of bent axle, and after long-time the use, if crank connecting rod and bearing need be changed when maintaining, can take apart left crank and right crank harmlessly and realize changing the maintenance.
Drawings
In order to make the purpose, technical scheme and beneficial effect of the utility model clearer, the utility model provides a following figure explains:
FIG. 1 is a schematic structural view of a conventional crankshaft;
FIG. 2 is a schematic structural view of the split-type assembled motorcycle crankshaft of the present invention;
FIG. 3 is a schematic structural view of the left crank;
FIG. 4 is a right side view of FIG. 3;
FIG. 5 is a schematic structural view of the right crank;
FIG. 6 is a left side view of FIG. 5;
fig. 7 is a schematic structural view of the limiting element.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
As shown in fig. 2, it is a schematic structural diagram of the split assembled motorcycle crankshaft of the present invention. The split assembled motorcycle crankshaft of the embodiment comprises a left crank 1 and a right crank 2, wherein the left crank 1 comprises a left crank handle part 3 and a left crank rod part 4, and the right crank 2 comprises a right crank handle part 5 and a right crank rod part 6. The left crank handle part 3 and the left crank rod part 4 are arranged separately, and one end of the left crank rod part 4 facing the left crank handle part 3 is sleeved with a timing gear 12 which rotates synchronously with the left crank rod part; the left crank handle part 3 is provided with a left jack 14 on one side facing the left crank rod part, and the left crank rod part 4 is provided with a left plug 15 matched with the left jack 14. Left crank pole portion 4 includes pole portion major diameter section 25 and is located pole portion major diameter section 25 towards the pole portion minor diameter section 26 of the one end of left crank stalk portion 3, and the external diameter of pole portion minor diameter section 26 is less than the external diameter of pole portion major diameter section 25 and forms the shaft shoulder between pole portion major diameter section 25 and pole portion minor diameter section 26, and timing gear 12 suit is on pole portion minor diameter section 26 and is fixed between shaft shoulder and left crank stalk portion 3, and the key-type connection between timing gear 12 and pole portion minor diameter section 26. The right crank stalk portion 5 and the right crank rod portion 6 components of a whole that can function independently setting of this embodiment, and be equipped with on the right crank rod portion 6 rather than integrated into one piece's drive gear 13, right crank stalk portion 5 is equipped with right jack 16 towards one side of right crank rod portion 6, is equipped with on the right crank rod portion 6 with right jack 16 complex right plug 17. Specifically, the left jack 14 and the right jack 16 are respectively provided with an internal spline, and the left plug 15 and the right plug 17 are respectively provided with an external spline engaged with the internal spline, so that the left crank handle part 3 and the left crank rod part 4 can synchronously rotate, and the right crank handle part 5 and the right crank rod part 6 can synchronously rotate.
The left crank handle part 3 of the embodiment is provided with an assembling pin 18, and the assembling pin 18 is integrally arranged with the left crank handle part 3 and is parallel to the left crank rod part 4; the right crank handle part 5 is provided with an assembling pin hole 19 matched with the assembling pin column 18; the assembling pin 18 is detachably assembled in the assembling pin hole 19, and the crank connecting rod 10 positioned between the left crank handle part 3 and the right crank handle part 5 is sleeved on the assembling pin 18; and a circumferential positioning structure and an axial limiting structure for preventing the assembling pin 18 from being drawn out of the assembling pin hole 19 are arranged between the assembling pin 18 and the assembling pin hole 19.
Further, the assembly pin 18 of the present embodiment includes a large diameter section 18a and a small diameter section 18b which are coaxially disposed, an outer diameter of the large diameter section 18a is larger than an outer diameter of the small diameter section 18b, an assembly pin hole 19 is matched with the small diameter section 18b, and the crank connecting rod 10 is sleeved on the large diameter section 18 a; a needle bearing 11 is arranged between the crank connecting rod 10 and the large-diameter section 18a, and two ends of the needle bearing 11 are respectively in limit fit with the left crank handle part 3 and the right crank handle part 5. The circumferential positioning structure of the embodiment comprises a positioning groove 20 which is arranged on the inner wall of the assembly pin hole 19 and extends along the generatrix direction of the assembly pin hole and a positioning block 21 which is arranged on the outer peripheral wall of the small diameter section 18b and is matched with the positioning groove 20, and the assembly position precision between the left crank and the right crank can be ensured through the positioning of the positioning groove 20 and the positioning block 21.
Further, the axial limiting structure of the embodiment comprises a radial hole 22 which is arranged in the right crank handle part 5 and is perpendicular to the axis of the assembling pin hole 19, a radial limiting hole 23 is arranged on the assembling pin column 18 corresponding to the radial hole 22, and a limiting element 24 which is in limiting fit with the radial limiting hole 23 is arranged in the radial hole 22. The radial hole 22 of this embodiment includes a radial large diameter section 22a and a radial small diameter section 22b that are coaxially disposed, the radial large diameter section 22a is located on one side of the radial small diameter section 22b that is radially outward, the inner diameter of the radial large diameter section 22a is greater than the inner diameter of the radial small diameter section 22b, and the inner diameter of the radial limiting hole 23 is equal to the inner diameter of the radial small diameter section 22 b. The radial large-diameter section 22a of the present embodiment is internally provided with internal threads, the limiting element 24 comprises a threaded section 24a in threaded fit with the radial large-diameter section 22a and a smooth section 24b in threaded fit with the radial small-diameter section 22b, and the smooth section 24b extends into the radial limiting hole 23 to be in limiting fit with the assembling pin 18. In the embodiment, a counterbore 22c is formed at the end of the radial large-diameter section 22a facing radially outwards, and a limiting head 24c positioned in the counterbore 22c is formed at the end of the threaded section 24a facing away from the smooth section 24 b. The technical purpose of axially limiting the assembling pin column 18 and the assembling pin hole 19 can be realized by arranging the limiting element 24, and the limiting element 24 is in threaded fit with the radial large-diameter section 22a, so that the limiting element 24 can be conveniently detached, and the technical purpose of detaching the left crank 1 and the right crank 2 is realized.
Further, a lubricating oil channel system is arranged between the right crank 2 and the assembling pin 18, the lubricating oil channel system comprises a central through hole 27 arranged in the right crank rod part 6, a blind hole 28 arranged at the bottom of the right inserting hole 16, a first inclined hole 29 arranged in the right crank handle part 5, a communicating hole 30 arranged in the assembling pin 18, a second inclined hole 31 arranged on the side wall of the communicating hole 30 and communicated with the first inclined hole 29, and a radial oil hole 32 arranged on the side wall of the communicating hole 30, one end of the first inclined hole 29 is communicated with the blind hole 28, the other end port is positioned on the inner wall of the assembling pin hole 19, and at least one sealing ring 33 is arranged between the right plug 17 and the right inserting hole 16. Both ends of the communication hole 30 penetrate the left crank shank 3 and supply lubricating oil to bearings 34,35 fitted around the left crank 1 and the right crank 2, respectively.
According to the split assembly type motorcycle crankshaft, the left crank handle part and the left crank rod part are arranged in a split mode, so that the timing gear can be directly installed on the left crank rod part, and special press-fitting equipment is not needed for assembly; the right crank handle part and the right crank rod part are arranged in a split manner, so that a transmission gear can be directly machined on the right crank rod part without adopting special machining equipment; in conclusion, the split assembly type motorcycle crankshaft is more convenient to assemble, universal equipment can be adopted for processing during processing, and equipment investment can be effectively reduced; through set up the assembly round pin post rather than an organic whole on left crank stalk portion, and will assemble the round pin post and directly cooperate with the assembly pinhole, utilize circumferential location structure to realize the circumferential location between assembly round pin post and the assembly pinhole, and then realize left crank and right crank's circumferential location, and utilize axial limit structure to prevent that the assembly round pin post from being taken out by axial force in the assembly pinhole, so, can satisfy the assembly and the operation requirement of bent axle, and after long-time the use, if crank connecting rod and bearing need be changed when maintaining, can take apart left crank and right crank harmlessly and realize changing the maintenance.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (10)
1. The utility model provides a components of a whole that can function independently assembled motorcycle crankshaft, includes left crank (1) and right crank (2), left crank (1) includes left crank stalk portion (3) and left crank pole portion (4), right crank (2) include right crank stalk portion (5) and right crank pole portion (6), its characterized in that:
the left crank handle part (3) and the left crank rod part (4) are arranged in a split mode, and a timing gear (12) rotating synchronously with the left crank handle part is sleeved on one end, facing the left crank handle part (3), of the left crank rod part (4); a left jack (14) is arranged on one side, facing the left crank rod part, of the left crank handle part (3), and a left plug (15) matched with the left jack (14) is arranged on the left crank rod part (4);
the right crank handle part (5) and the right crank rod part (6) are arranged in a split mode, a transmission gear (13) which is integrally formed with the right crank rod part is arranged on the right crank rod part (6), a right insertion hole (16) is formed in one side, facing the right crank rod part (6), of the right crank handle part (5), and a right plug (17) matched with the right insertion hole (16) is arranged on the right crank rod part (6);
an assembling pin column (18) is arranged on the left crank handle part (3), and the assembling pin column (18) and the left crank handle part (3) are integrally arranged and are parallel to the left crank rod part (4); the right crank handle part (5) is provided with an assembling pin hole (19) matched with the assembling pin column (18); the assembling pin column (18) is detachably assembled in the assembling pin hole (19), and a crank connecting rod (10) positioned between the left crank handle part (3) and the right crank handle part (5) is sleeved on the assembling pin column (18); and a circumferential positioning structure and an axial limiting structure for preventing the assembling pin (18) from being drawn out of the assembling pin hole (19) are arranged between the assembling pin (18) and the assembling pin hole (19).
2. The split-mount motorcycle crankshaft of claim 1, wherein: the assembling pin column (18) comprises a large-diameter section (18 a) and a small-diameter section (18 b) which are coaxially arranged, the outer diameter of the large-diameter section (18 a) is larger than that of the small-diameter section (18 b), the assembling pin hole (19) is matched with the small-diameter section (18 b), and the crank connecting rod (10) is sleeved on the large-diameter section (18 a); a needle bearing (11) is arranged between the crank connecting rod (10) and the large-diameter section (18 a), and two ends of the needle bearing (11) are respectively in limit fit with the left crank handle part (3) and the right crank handle part (5).
3. The split-mount motorcycle crankshaft of claim 2, wherein: the circumferential positioning structure comprises a positioning groove (20) which is arranged on the inner wall of the assembling pin hole (19) and extends along the generatrix direction of the assembling pin hole, and a positioning block (21) which is arranged on the outer peripheral wall of the small-diameter section (18 b) and matched with the positioning groove (20).
4. The split-mount motorcycle crankshaft of claim 1, wherein: the axial limiting structure comprises a radial hole (22) which is arranged in the right crank handle part (5) and is vertical to the axis of the assembling pin hole (19), a radial limiting hole (23) is correspondingly arranged on the assembling pin column (18) and the radial hole (22), and a limiting element (24) which is in limiting fit with the radial limiting hole (23) is arranged in the radial hole (22).
5. The split-mount motorcycle crankshaft of claim 4, wherein: the radial hole (22) comprises a radial large-diameter section (22 a) and a radial small-diameter section (22 b) which are coaxially arranged, the radial large-diameter section (22 a) is located on one side, radially outwards, of the radial small-diameter section (22 b), the inner diameter of the radial large-diameter section (22 a) is larger than that of the radial small-diameter section (22 b), and the inner diameter of the radial limiting hole (23) is equal to that of the radial small-diameter section (22 b).
6. The split-mount motorcycle crankshaft of claim 5, wherein: the radial large-diameter section (22 a) is internally provided with internal threads, the limiting element (24) comprises a thread section (24 a) in threaded fit with the radial large-diameter section (22 a) and a smooth section (24 b) in threaded fit with the radial small-diameter section (22 b), and the smooth section (24 b) extends into the radial limiting hole (23) to be in limiting fit with the assembling pin column (18).
7. The split-mount motorcycle crankshaft of claim 6, wherein: a counter bore (22 c) is formed in the radially outward end of the radial large-diameter section (22 a), and a limiting head (24 c) located in the counter bore (22 c) is arranged at the end, facing away from the smooth section (24 b), of the threaded section (24 a).
8. The split-mount motorcycle crankshaft of claim 1, wherein: the left jack (14) and the right jack (16) are internally provided with internal splines respectively, and the left plug (15) and the right plug (17) are provided with external splines engaged with the internal splines respectively.
9. The split-mount motorcycle crankshaft of claim 8, wherein: left crank pole portion (4) include pole portion major diameter section (25) and be located pole portion major diameter section (25) face the pole portion minor diameter section (26) of the one end of left crank stalk portion (3), the external diameter of pole portion minor diameter section (26) is less than the external diameter of pole portion major diameter section (25) and is in form the shaft shoulder between pole portion major diameter section (25) and pole portion minor diameter section (26), timing gear (12) suit is in on pole portion minor diameter section (26) and fixed the shaft shoulder with between left crank stalk portion (3).
10. The split-mount motorcycle crankshaft of claim 1, wherein: a lubricating oil channel system is arranged between the right crank (2) and the assembling pin column (18), the lubricating oil channel system comprises a central through hole (27) arranged in the right crank rod part (6), a blind hole (28) arranged at the bottom of the right insertion hole (16), a first inclined hole (29) arranged in the right crank handle part (5), a communication hole (30) arranged in the assembling pin column (18), a second inclined hole (31) arranged on the side wall of the communication hole (30) and communicated with the first inclined hole (29), and a radial oil hole (32) arranged on the side wall of the communication hole (30), one end of the first inclined hole (29) is communicated with the blind hole (28), the port of the other end is positioned on the inner wall of the assembly pin hole (19), at least one sealing ring (33) is arranged between the right plug (17) and the right jack (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021492514.0U CN212838928U (en) | 2020-07-24 | 2020-07-24 | Split assembled motorcycle crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021492514.0U CN212838928U (en) | 2020-07-24 | 2020-07-24 | Split assembled motorcycle crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212838928U true CN212838928U (en) | 2021-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021492514.0U Active CN212838928U (en) | 2020-07-24 | 2020-07-24 | Split assembled motorcycle crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212838928U (en) |
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2020
- 2020-07-24 CN CN202021492514.0U patent/CN212838928U/en active Active
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