CN201093060Y - Engine reverse gear mechanism - Google Patents
Engine reverse gear mechanism Download PDFInfo
- Publication number
- CN201093060Y CN201093060Y CNU2007201248226U CN200720124822U CN201093060Y CN 201093060 Y CN201093060 Y CN 201093060Y CN U2007201248226 U CNU2007201248226 U CN U2007201248226U CN 200720124822 U CN200720124822 U CN 200720124822U CN 201093060 Y CN201093060 Y CN 201093060Y
- Authority
- CN
- China
- Prior art keywords
- sprocket
- live axle
- reverse gear
- pawl
- gear 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 a reverse gear mechanism of a motor, which comprises a main shaft and a drive shaft. The utility model is characterized in that a main drive sprocket is arranged on a main shaft, a driven sprocket is sleeved on a drive shaft, the main drive sprocket and the driven sprocket are driven through a chain, one or one than one sprocket hole is arranged on the driven sprocket, a shifting fork claw is arranged on the drive shaft, and the shifting fork claw can be axially moved on the drive shaft, one or more than one projecting claw is arranged on the shifting fork claw, when the shifting fork claw is moving, each projecting claw can be extended into a corresponded sprocket hole. The reverse gear mechanism of the motor of the utility model does not change the structure of an original crankcase, which need not an angle gear, a pair of sprockets is only added on a main shaft and a drive shaft, the two sprockets are connected by a chain, when reverse gear is needed, the reverse gear mechanism is only needed to be operated, and the power is led to be transmitted through a chain, the operation is convenient, production cost is cheap, a special-purpose actuating mechanism is eliminated, an angle gear is not needed, the processing of sprockets is easy, and the production cost is relatively lowered.
Description
Technical field
The utility model relates to the appurtenances of engine art, particularly a kind of reverse gear mechanism that is used for dune buggy engine.
Background technique
For general two-wheeled motor vehicle, mostly do not adopt reverse gear apparatus, generally all artificial promotion in the time of need shrinking back.And for beach buggy because its quality is heavy, volume is bigger, with and the needs of field of employment and environment, require its motor that reverse gear mechanism must be arranged.The power of motor transmits by gear engagement, transfer route is a bent axle---main shaft---live axle, and live axle travels forward when just changeing, and moves backward during the live axle counter-rotating.Existing beach buggy reverse gear mechanism generally is that machine reverses gear outward, it is exactly to drive bevel gear of the tip of the axis installation that machine reverses gear outward, and in the direction vertical with live axle, a transmission shaft is installed, two bevel gears are arranged on the transmission shaft, the bevel gear sky is enclosed within on the transmission shaft, two bevel gears respectively with live axle on bevel gear keep normal engagement.There is one to connect pawl between two bevel gears, connects pawl and be connected with transmission shaft, and can on transmission shaft, move axially by rectangular spline.Stir by operating mechanism and to connect pawl and combine with two bevel gears on the transmission shaft respectively, make transmission shaft realize positive and negative both direction rotation, thereby realize front-and-back stop.This reverse gear mechanism must have the special operating mechanism of a cover, stirs to connect pawl with two bevel gear combinations, and structure is too complicated, and the processing of bevel gear is very difficult, and cost is also high.
Summary of the invention
The utility model provides a kind of motor reverse gear mechanism simple in structure, easy to operate, with low cost at the above-mentioned deficiency of prior art.
The technical solution of the utility model: the motor reverse gear mechanism, comprise main shaft and live axle, it is characterized in that: on described main shaft drive sprocket is set, the driven chain bye is enclosed within on the live axle, drives with chain between drive sprocket and the driven sprocket; Driven sprocket is provided with one or more sprocket hole, and the shift fork pawl is arranged on the live axle, and the shift fork pawl can move axially on live axle; The shift fork pawl is provided with one or more prominent pawl, and each prominent pawl can stretch in the corresponding sprocket hole when shift fork pawl moved;
Further be characterised in that: described sprocket hole is 3-5; The shape of prominent pawl and size match with sprocket hole, and quantity is corresponding one by one.
Motor reverse gear mechanism of the present utility model with respect to prior art, has following characteristics:
1, do not change former crankcase structure, do not need bevel gear, highly versatile;
2, simple in structure; Just increase pair of sprocket on main shaft, live axle, two sprocket wheels connect with chain, in the time of need reversing gear, only need to handle gearshift, make power by the chain transmission just;
3, easy to operate; Do not need special operating mechanism just can realize rotating and reverse of live axle, realize gear reversing function;
4, with low cost; Cancelled special operating mechanism, do not needed bevel gear, the processing of sprocket wheel is easy to, the corresponding reduction of cost.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described:
Accompanying drawing is the structural representation of the utility model reverse gear mechanism;
Embodiment
As shown in the figure, 1-main shaft, 2-drive sprocket, 3-chain, 4-driven sprocket, 6-shift fork pawl, 7-live axle, 8-sprocket hole, the 9-pawl of dashing forward, 10-fork slot, 11-back-up ring, 12-packing ring, 13-oil duct, 14-oilhole, 15-plug;
The utility model reverse gear mechanism comprises main shaft 1 and live axle 7, and main shaft 1 and live axle 7 all are the parts in the transmission device of the prior art; Improvement of the present utility model is that drive sprocket 2 is set on main shaft 1, and drive sprocket 2 cooperates by interference fit or key and is connected with main shaft 1, rotates synchronously with main shaft 1; Driven sprocket 4 skies are enclosed within on the live axle 7, and driven sprocket 4 is Spielpassung with live axle 7, and sprocket wheel 4 can drive with chain 3 between drive sprocket 2 and the driven sprocket 4 around live axle 7 rotations; Driven sprocket 4 is provided with one or more sprocket hole 8, and 3-5 sprocket hole 8 can be set in the reality.Shift fork pawl 6 is arranged on the live axle 7, specifically can link to each other with live axle 7 by rectangular spline, and shift fork pawl 6 can move axially on live axle 7; Shift fork pawl 6 is provided with prominent pawl 9 and fork slot 10, and prominent pawl 9 is one or more, and the shape of prominent pawl 9 and size match with sprocket hole 8, and quantity is corresponding one by one, and each prominent pawl 9 can stretch in the corresponding sprocket hole 8 when shift fork pawl 6 moved; Fork slot 10 is circular grooves, is used to install the shift fork (not shown); When needing gear shift, handle gearshift, shift fork drives shift fork pawl 6 and moves axially, prominent pawl 9 is stretched in the corresponding sprocket hole 8, driven sprocket 4 is connected with shift fork pawl 6 and rotates synchronously, driven sprocket 4 drives shift fork pawl 6 and rotates, and shift fork pawl 6 drives live axle 7 again and rotates, and live axle 7 and main shaft 1 are rotated in the same way.
Back-up ring 11 is installed on live axle 7, and in order to the position of restriction shift fork pawl 6 and driven sprocket 4, it is excessive to prevent that it from moving axially distance.Packing ring 12 is in order to adjust the axial clearance of driven sprocket 4.
Matching surface for lubricated driven sprocket 4 and live axle 7, avoid that sprocket wheel is stuck, unfavorable phenomenon such as ineffective causes shifting gears, the utility model also designs on live axle 7 oil duct 13 and oilhole 14, and the left end design of oil duct 13 has plug 15, prevents lubricating oil leakage.When engine running, pressure machine oil is arranged in the oil duct 13 always, machine oil is by oilhole 14 ejections, and the matching surface of lubricated driven sprocket 4 and live axle 7 avoids sprocket wheel stuck.
Chain in this mechanism can be roller chain, silent chain or Toothed belt.
This mechanism is also applicable to two-wheeled motorcycle or motor tricycle.
Working procedure of the present utility model:
Engine power is passed to main shaft 1 via bent axle, passes to live axle 7 through the engagement driving of shifting gear then, and live axle 7 drives driving wheel rotation again, this moment live axle 7 with main shaft 1 backward rotation, thereby beach buggy is advanced.When beach buggy advanced, shift fork pawl 6 separated with driven sprocket 4, and driven sprocket 4 skies are enclosed within on the live axle 7 and dally; When beach buggy need retreat, the driver can make shift fork drive shift fork pawl 6 and be moved to the left by handling gearshift, and prominent pawl 9 is inserted in the sprocket hole 8 of driven sprocket 4, and main shaft 1 disengages with the shifting gear of live axle 7 simultaneously; At this moment, the power of main shaft 1 is just passed to live axle 7 again via drive sprocket 2, chain 3, driven sprocket 4, shift fork pawl 6, because chain transmission does not change moving direction, the rotation direction of live axle 7 is rotated (opposite with original direction) in the same way with main shaft 1, therefore can realize reversing gear.
Claims (3)
1. motor reverse gear mechanism, comprise main shaft (1) and live axle (7), it is characterized in that: drive sprocket (2) is set on described main shaft (1), and driven sprocket (4) sky is enclosed within on the live axle (7), drives with chain (3) between drive sprocket (2) and the driven sprocket (4); Driven sprocket (4) is provided with one or more sprocket hole (8), and shift fork pawl (6) is arranged on the live axle (7), and shift fork pawl (6) can move axially on live axle (7); Shift fork pawl (6) is provided with one or more prominent pawl (9), and each prominent pawl (9) can stretch in the corresponding sprocket hole (8) when shift fork pawl (6) was mobile.
2. motor reverse gear mechanism according to claim 1 is characterized in that: described sprocket hole (8) is 3-5; The shape of prominent pawl (9) and size match with sprocket hole (8), and quantity is corresponding one by one.
3. motor reverse gear mechanism according to claim 1 and 2 is characterized in that: live axle (7) is provided with oil duct (13) and oilhole (14), and machine oil is by the matching surface of lubricated driven sprocket (4) of oilhole (14) and live axle (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201248226U CN201093060Y (en) | 2007-07-26 | 2007-07-26 | Engine reverse gear mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201248226U CN201093060Y (en) | 2007-07-26 | 2007-07-26 | Engine reverse gear mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201093060Y true CN201093060Y (en) | 2008-07-30 |
Family
ID=39901027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201248226U Expired - Fee Related CN201093060Y (en) | 2007-07-26 | 2007-07-26 | Engine reverse gear mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201093060Y (en) |
-
2007
- 2007-07-26 CN CNU2007201248226U patent/CN201093060Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080730 Termination date: 20120726 |