CN202579882U - External gear mechanism of motorcycle engine balance shaft - Google Patents
External gear mechanism of motorcycle engine balance shaft Download PDFInfo
- Publication number
- CN202579882U CN202579882U CN 201220151227 CN201220151227U CN202579882U CN 202579882 U CN202579882 U CN 202579882U CN 201220151227 CN201220151227 CN 201220151227 CN 201220151227 U CN201220151227 U CN 201220151227U CN 202579882 U CN202579882 U CN 202579882U
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- CN
- China
- Prior art keywords
- driven gear
- trunnion shaft
- balance
- gear
- combined mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an external gear mechanism of a motorcycle engine balance shaft, which comprises a balance shaft, a crank connecting rod assembly, a left crankshaft case, a right crankshaft case, a right crankshaft case cover, a driving gear and a balance driven gear combined mechanism. The key point is that the balance shaft and a right crankshaft of the crank connecting rod assembly extend out of the right crankshaft case; and a balance gear pair consisting of the balance driven gear combined mechanism and the driving gear is arranged between the right crankshaft case and the right crankshaft case cover. After the balance shaft engine assembly is assembled, if the engine balance gear pair still has louder noise, the balance gear pair can be exchanged by disassembling the right crankshaft case cover, so that the problems of the noise of the engine balance gear pair and large assembling repair amount of the balance shaft engine assembly are solved.
Description
Technical field
The utility model relates to technical field of engines, specifically, is the external gear mechanism of a kind of motorcycle engine trunnion shaft.
Background technique
In order to make the compact structure of trunnion shaft motor, reduce the vibration of motor, usually trunnion shaft and balance gear mechanism can be set between left and right crankcase.Be illustrated in figure 1 as the built-in gear structure of balance shaft of engine; Comprise trunnion shaft 1, crank-connecting rod assembly 2, left crankcase 3, right crankcase 4; Be provided with trunnion shaft left side block bearing 5, left crank block bearing 6 in the left crankcase 3, be provided with the right block bearing 7 of trunnion shaft, right crank block bearing 8, driving gear 14 and balance driven gear combined mechanism 10 etc. in the right crankcase 4.Driving gear 14 through latch 16 fixedly encapsulation on the right crank 2a of crank-connecting rod assembly 2, and be positioned at the left side of right crank block bearing 8; Balance driven gear combined mechanism 10 is contained on the trunnion shaft 1 and is positioned at the left side of the right block bearing 7 of trunnion shaft, with driving gear 14 corresponding engagements.Trunnion shaft 1 and balance driven gear combined mechanism 10 have certain left and right sides shifting amount between left crankcase 3 and right crankcase 4, can run well with assurance mechanism.
Because driving gear 14 is contained in the crankcase with the balance gear pair that balance driven gear combined mechanism 10 constitutes; If find again that after the engine assembly assembling is accomplished the secondary engagement noise of balance gear is big; When causing that this balance gear is secondary must be changed, ressemble after must dissecting engine assembly fully.Therefore this gear embedding structure is to the centre distance of trunnion shaft left side block bearing 5, right block bearing 7 mounting holes of trunnion shaft; And the centre distance dimension precision requirement of left crank block bearing 6, right crank block bearing 8 mounting holes is higher, simultaneously the secondary accuracy of mesh of balance gear is had relatively high expectations.And existing crankcase and balance Gear Production technology are bad to the accuracy of manufacturing control of the centre distance size of the crank block bearing mounting hole of left and right sides crankcase and balance shaft support bearing mounting hole and balance gear pair; Cause engine balance gear pair noise bigger, the trunnion shaft engine assembly assembling amount of reprocessing is big.
The model utility content
The purpose of the utility model is not exclusively to dissect under the prerequisite of engine assembly, and is secondary through changing balance gear, thereby solves the noise problem of engine balance gear pair, promptly solves the big problem of the trunnion shaft engine assembly assembling amount of reprocessing.
For this reason; The technological scheme that the utility model adopted is: the external gear mechanism of a kind of motorcycle engine trunnion shaft; Comprise trunnion shaft, crank-connecting rod assembly, left crankcase, right crankcase and right crankcase cover; Be provided with trunnion shaft left side block bearing and left crank block bearing in the said left crankcase; Be provided with right block bearing of trunnion shaft and right crank block bearing in the right crankcase; Key is: stretch out at said trunnion shaft and be set with balance driven gear combined mechanism on the shaft part outside the right crankcase, on the trunnion shaft between right block bearing of said trunnion shaft and the balance driven gear combined mechanism, be set with the axle sleeve packing ring, be equipped with packing ring and nut successively on the right side of said balance driven gear combined mechanism; Balance driven gear combined mechanism is fastened on the trunnion shaft; The inner ring of the right block bearing of trunnion shaft driven gear combined mechanism, trunnion shaft and trunnion shaft is become one, stretch out on the right crank outside the right crankcase at said crank-connecting rod assembly and be set with driving gear, said driving gear and balance driven gear combined mechanism mesh together.
Further preferred as this programme; Said balance driven gear combined mechanism is fixed on the trunnion shaft through woodruff key; Balance driven gear combined mechanism is made up of cover, driven gear in the driven gear and the spring that is circumference uniform distribution; Said driven gear is sleeved in the driven gear and puts; Driven gear cooperates with the interior cover of driven gear gap, and the groove that puts in groove on the said driven gear and the driven gear forms the spring housing that holds spring, and the right side of cover is outward extended with limited step in the said driven gear.Usually, under the locations of structures condition of limited, balance driven gear combined mechanism is fixed on the trunnion shaft through latch, and adopts the fixing structural type of woodruff key, and structure is more reliable, processes convenient; Cover has increased limited step in the driven gear, simplified installation, reduced number of spare parts, and the driven gear structure of introducing in the background technique when mounted, and it is spacing to the right side of spring packing ring to be set in addition.
In addition, said axle sleeve packing ring comprises axle sleeve section and gasket segments, and the limited step that puts in said gasket segments and the driven gear is fixed in the spring housing about with spring, and the axle sleeve section is used to adjust the distance of driven gear and right crankcase.
Further, said driving gear comprises axle sleeve section and fluted disc section, the balance driven gear combined mechanism engagement on fluted disc section and the trunnion shaft, and the axle sleeve section is used to adjust the distance of driving gear and right crankcase.
The right crank of the trunnion shaft of the utility model, crank-connecting rod assembly reaches outside the right crankcase; And will be arranged on by the balance gear pair that balance driven gear combined mechanism and driving gear constitute between right crankcase and the right crankcase cover; When finding again that after the assembling of trunnion shaft engine assembly is accomplished engine balance gear pair noise is big; Can only pull down right crankcase cover; Secondary with regard to replaceable balance gear, thus the noise problem of solution engine balance gear pair, and the big problem of the trunnion shaft engine assembly assembling amount of reprocessing; In addition, the inner ring of the right block bearing of trunnion shaft driven gear combined mechanism, trunnion shaft and trunnion shaft is fixed together, and has eliminated the left and right sides shifting amount of trunnion shaft between left crankcase and right crankcase, has also reduced the noise of trunnion shaft motor.
Description of drawings
Fig. 1 is the built-in gear structure of introducing in the background technique of balance shaft of engine.
Fig. 2 is the structural representation of the utility model.
Fig. 3 is the structural representation of balance driven gear combined mechanism in the utility model.
Fig. 4 is the right elevation of Fig. 3.
Fig. 5 is the structural representation that overlaps in the driven gear in the utility model.
Fig. 6 is the structural representation of driven gear in the utility model.
Fig. 7 is the structural representation of the utility model Intermediate shaft sleeve packing ring.
Fig. 8 is the structural representation of driving gear in the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further:
The external gear mechanism of motorcycle engine trunnion shaft shown in Figure 2, balance gear pair that constitutes by trunnion shaft 1, crank-connecting rod assembly 2, left crankcase 3, right crankcase 4, right crankcase cover 15, by driving gear 14 and balance driven gear combined mechanism 10 etc. is formed.Be provided with trunnion shaft left side block bearing 5 and left crank block bearing 6 in the left crankcase 3, be provided with right block bearing 7 of trunnion shaft and right crank block bearing 8 in the right crankcase 4.Trunnion shaft left side block bearing 5 is used to support the left end of trunnion shaft 1, and the right block bearing 7 of trunnion shaft is used to support the right-hand member of trunnion shaft 1.Crank-connecting rod assembly 2 is made up of left crank, right crank 2a and connecting rod etc., and left crank block bearing 6 is used to support left crank, and right crank block bearing 8 is used for support right crank 2a.The arranged outside left crankcase lid (not shown) of left crankcase 3, the arranged outside of right crankcase 4 has right crankcase cover 15.Driving gear 14 is contained on the right crank 2a of crank-connecting rod assembly 2, and balance driven gear combined mechanism 10 is contained in the right side axle journal of trunnion shaft 1, with driving gear 14 corresponding engagements.The above, identical with conventional construction.
Difference is: the right-hand member of trunnion shaft 1 reaches outside the right crankcase 4, and the right crank 2a of crank-connecting rod assembly 2 also reaches outside the right crankcase 4.Be set with balance driven gear combined mechanism 10 on the shaft part outside trunnion shaft 1 stretches out right crankcase 4; On the trunnion shaft 1 between right block bearing 7 of trunnion shaft and the balance driven gear combined mechanism 10, be set with axle sleeve packing ring 9; Be equipped with packing ring 11 and nut 12 successively on the right side of balance driven gear combined mechanism 10; Be provided with the outside thread that cooperates with nut 12 in the right part of trunnion shaft 1; Packing ring 11 is fastened on balance driven gear combined mechanism 10 on the trunnion shaft 1 with nut 12, makes fastening the becoming one of inner ring 7a of trunnion shaft driven gear combined mechanism 10, trunnion shaft 1 and the right spring bearing 7 of trunnion shaft.The right block bearing 7 of trunnion shaft, axle sleeve packing ring 9, balance driven gear combined mechanism 10, packing ring 11 and nut 12 are arranged on trunnion shaft 1 successively.Be set with driving gear 14 on the right crank 2a outside crank-connecting rod assembly 2 stretches out right crankcase 4, driving gear 14 meshes together with balance driven gear combined mechanism 10.The balance gear pair that is made up of balance driven gear combined mechanism 10 and driving gear 14 is arranged between right crankcase 4 and the right crankcase cover 15.
Balance driven gear combined mechanism 10 is fixed on the trunnion shaft 1 through woodruff key 13, can adopt latch to be fixed on the trunnion shaft 1, can also adopt involute splines to be fixed on the trunnion shaft 1.
Shown in Fig. 3-6, balance driven gear combined mechanism 10 is made up of the some spring 10c that overlap 10a, driven gear 10b in the driven gear and be circumference uniform distribution.Driven gear 10b is sleeved on and overlaps in the driven gear on the 10a, cover 10a Spielpassung in driven gear 10b and the driven gear.Driven gear 10b is provided with and number of springs, position corresponding groove; Cover 10a is provided with and spring 10c quantity, position corresponding groove in the driven gear, and the groove 10f in groove 10g on the driven gear 10b and the driven gear on the cover 10a forms the 10d of spring housing that holds spring 10c.The right side of cover 10a is outward extended with limited step 10e in the driven gear.Groove 10f in the driven gear on the cover 10a and the spacing 10e of step add cost preferably by the moulding of mould finish forge to have significantly reduced machine.
As shown in Figure 7, axle sleeve packing ring 9 comprises axle sleeve section 9a and gasket segments 9b, and the length of axle sleeve section 9a is provided with as required, is used to adjust the distance of driven gear 10b and right crankcase 4.Can know that in conjunction with Fig. 2 the limited step 10e in gasket segments 9b and the driven gear on the cover 10a is fixed in the 10d of spring housing about with spring 10c.
As shown in Figure 8, driving gear 14 comprises axle sleeve section 14a and fluted disc section 14b, and the length of axle sleeve section 14a is provided with as required, is used to adjust the distance of driving gear 14 and right crankcase 4, balance driven gear combined mechanism 10 engagements on fluted disc section 14b and the trunnion shaft 1.
Claims (4)
1. external gear mechanism of motorcycle engine trunnion shaft; Comprise trunnion shaft (1), crank-connecting rod assembly (2), left crankcase (3), right crankcase (4) and right crankcase cover (15); Be provided with trunnion shaft left side block bearing (5) and left crank block bearing (6) in the said left crankcase (3); Be provided with right block bearing (7) of trunnion shaft and right crank block bearing (8) in the right crankcase (4); It is characterized in that: be set with balance driven gear combined mechanism (10) on the shaft part outside said trunnion shaft (1) stretches out right crankcase (4); On the trunnion shaft (1) between right block bearing (7) of said trunnion shaft and the balance driven gear combined mechanism (10), be set with axle sleeve packing ring (9); Be equipped with packing ring (11) and nut (12) on the right side of said balance driven gear combined mechanism (10) successively, balance driven gear combined mechanism (10) is fastened on the trunnion shaft (1), make fastening the becoming one of inner ring (7a) of the right spring bearing of trunnion shaft driven gear combined mechanism (10), trunnion shaft (1) and trunnion shaft (7); Be set with driving gear (14) on the right crank (2a) outside said crank-connecting rod assembly (2) stretches out right crankcase (4), said driving gear (14) meshes together with balance driven gear combined mechanism (10).
2. according to the external gear mechanism of the described motorcycle engine trunnion shaft of claim 1; It is characterized in that: said balance driven gear combined mechanism (10) is fixed on the trunnion shaft (1) through woodruff key (13); Balance driven gear combined mechanism (10) is by cover (10a), driven gear (10b) in the driven gear and spring (10c) formation that is circumference uniform distribution; Said driven gear (10b) is sleeved on and overlaps on (10a) in the driven gear; Driven gear (10b) and the interior cover of driven gear (10a) Spielpassung; Groove in groove on the said driven gear (10b) and the driven gear on the cover (10a) forms the spring housing (10d) that holds spring (10c), and the right side of cover (10a) is outward extended with limited step (10e) in the said driven gear.
3. according to the external gear mechanism of the described motorcycle engine trunnion shaft of claim 2; It is characterized in that: said axle sleeve packing ring (9) comprises axle sleeve section (9a) and gasket segments (9b), and the limited step (10e) in said gasket segments (9b) and the driven gear on the cover (10a) is fixed in the spring housing (10d) about with spring (10c).
4. according to the external gear mechanism of each described motorcycle engine trunnion shaft among the claim 1-3; It is characterized in that: said driving gear (14) comprises axle sleeve section (14a) and fluted disc section (14b), balance driven gear combined mechanism (10) engagement on fluted disc section (14b) and the trunnion shaft (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220151227 CN202579882U (en) | 2012-04-11 | 2012-04-11 | External gear mechanism of motorcycle engine balance shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220151227 CN202579882U (en) | 2012-04-11 | 2012-04-11 | External gear mechanism of motorcycle engine balance shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202579882U true CN202579882U (en) | 2012-12-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220151227 Expired - Fee Related CN202579882U (en) | 2012-04-11 | 2012-04-11 | External gear mechanism of motorcycle engine balance shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202579882U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628503A (en) * | 2012-04-11 | 2012-08-08 | 力帆实业(集团)股份有限公司 | External gear structure for engine balance shaft |
| CN103883424A (en) * | 2014-03-26 | 2014-06-25 | 江门天钇金属工业有限公司 | Motorcycle engine |
-
2012
- 2012-04-11 CN CN 201220151227 patent/CN202579882U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628503A (en) * | 2012-04-11 | 2012-08-08 | 力帆实业(集团)股份有限公司 | External gear structure for engine balance shaft |
| CN102628503B (en) * | 2012-04-11 | 2015-05-20 | 力帆实业(集团)股份有限公司 | External gear structure for engine balance shaft |
| CN103883424A (en) * | 2014-03-26 | 2014-06-25 | 江门天钇金属工业有限公司 | Motorcycle engine |
| CN103883424B (en) * | 2014-03-26 | 2017-01-18 | 江门天钇金属工业有限公司 | Motorcycle engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20200411 |