CN203906675U - Speed variator - Google Patents
Speed variator Download PDFInfo
- Publication number
- CN203906675U CN203906675U CN201420210479.7U CN201420210479U CN203906675U CN 203906675 U CN203906675 U CN 203906675U CN 201420210479 U CN201420210479 U CN 201420210479U CN 203906675 U CN203906675 U CN 203906675U
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- CN
- China
- Prior art keywords
- gear
- countershaft
- speed change
- teeth
- trapezoidal
- 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 speed variator. The speed variator comprises a main shaft and an auxiliary shaft which are driven through a motor, wherein a trapezoidal gear is fixedly arranged on the main shaft; a plurality of teeth are arranged on the trapezoidal gear in the circumferential direction; the length difference of each two adjacent teeth is consistent; a full gear meshed with the trapezoidal gear and corresponding to the trapezoidal gear in position is arranged on the auxiliary shaft; the full gear can move relative to the auxiliary shaft in the length direction of the auxiliary shaft. According to the utility model, by arranging the trapezoidal gear with multiple teeth which are different in length on the main shaft and adjusting the position of the full gear, relative to the trapezoidal gear, on the auxiliary shaft, the rotation distance of the auxiliary shaft is changed. Therefore, the rotational speed of transmission equipment connected with the auxiliary shaft is changed and the effect of speed change is realized.
Description
Technical field
The utility model has related to a kind of speed change gear, belongs to field of mechanical technique.
Background technique
Speed changer is can fix or stepping changes the gear drive of output shaft and input shaft velocity ratio, claims again gearbox.Speed changer is comprised of driving mechanism and gear, is conventionally contained between the driving shaft and driven shaft of motor.
The common structure of existing speed change gear is comparatively complicated, and cost of production is relatively high, is unfavorable for penetration and promotion.
Model utility content
technical problem to be solved in the utility model is to provide a kind of speed change gear, can realize easily speed Control, and simple in structure, with low cost.
In order to solve the problems of the technologies described above, the technological scheme that the utility model adopts is:
A kind of speed change gear, comprise by motor-driven main shaft and countershaft, on described main shaft, be fixedly installed trapezoidal gear, on described trapezoidal gear, along it, be circumferentially provided with a plurality of teeth, length difference between described adjacent two teeth is consistent, on described countershaft, arrange and described trapezoidal gear all gear that be meshed, that position is corresponding, and described all gear can move along its length relative to described countershaft.
Aforesaid a kind of speed change gear, it is characterized in that: on described countershaft, be also provided with the groove that quantity is identical with the number of teeth of described all gear, on described main shaft, be provided with corresponding with described groove location, the stepped concave surface that length is consistent, and the step number of described stepped concave surface is consistent with the teeth quantity of described trapezoidal gear, between described stepped concave surface and described groove, be provided with thimble seat, in described thimble seat, be provided with thimble and spring, on described countershaft, be also provided with described all gear and be fixedly connected with fork, between described fork and described thimble seat, be provided with first connecting rod and second connecting rod, and be provided with universal joint between described first connecting rod and second connecting rod.
Aforesaid a kind of speed change gear, is characterized in that: on described first connecting rod, be also fixedly connected with pole, the free end of described pole is connected with the first keyway of speed change gear casing inner wall.
Aforesaid a kind of speed change gear, is characterized in that: on described countershaft, be provided with many second keyways consistent with described trapezoidal gear length, described all gear can move along described the second keyway.
Aforesaid a kind of speed change gear, is characterized in that: the lower end of described thimble is also provided with bearing.
Aforesaid a kind of speed change gear, is characterized in that: the teeth quantity of described trapezoidal gear is 6.
The beneficial effects of the utility model are:
1, by the trapezoidal gear of teeth that differ with a plurality of length is set on main shaft, by adjusting the position of the relatively trapezoidal gear of all gear on countershaft, change the rotation distance of countershaft, thereby changed the rotational velocity of the transmission device being connected with countershaft, realized the effect of speed change;
2, by stair-stepping concave surface is set on main shaft, the groove identical with all gear number of teeth is set on countershaft, and between main shaft and countershaft, thimble is set, and the connecting rod that on the thimble seat outside thimble, setting is connected with fork, when fork drives all gear to select different speed, thimble is brought to corresponding concave surface place, when all gear by the process of trapezoidal gear driven in, thimble drops in concave surface, countershaft is not had to position-limiting action, countershaft rotates under the drive of all gear, when all gear leaves the teeth of trapezoidal gear, thimble just in time turns to the edge of concave surface, in the process being rotated further at main shaft, the lower end of thimble contacts with the convex surface of main shaft, thimble is by jack-up, insert in groove upper end, thereby countershaft is played to spacing function, prevent that it is because inertia is rotated further.
Accompanying drawing explanation
fig. 1 is the fractionation schematic diagram of a kind of speed change gear of the utility model.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
As shown in Figure 1, a kind of speed change gear, comprise by motor-driven main shaft 1 and countershaft 2, on described main shaft 1, be fixedly installed trapezoidal gear 3, on described trapezoidal gear 3, along it, be circumferentially provided with a plurality of teeth 31, length difference between described adjacent two teeth 31 is consistent, all gear 4 that be meshed with described trapezoidal gear 3, position is corresponding is set on described countershaft 2, and described all gear 4 can move along its length relative to described countershaft 2.By the trapezoidal gear 3 of teeth that differ with a plurality of length 31 is set on main shaft 1, by adjusting the position of the relatively trapezoidal gear 3 of all gear 4 on countershaft 2, change the rotation distance of countershaft 2, thereby changed the rotational velocity of the transmission device being connected with countershaft 2, realized the effect of speed change, simple in structure, easy to operate, and with low cost, be convenient to promote the use of.
On described countershaft 2, be also provided with the groove 7 that quantity is identical with the number of teeth of described all gear 4, on described main shaft 1, be provided with corresponding with described groove 7 positions, the stepped concave surface 5 that length is consistent, and the step number of described stepped concave surface 5 is consistent with teeth 31 quantity of described trapezoidal gear 3, between described stepped concave surface 5 and described groove 7, be provided with thimble seat 9, in described thimble seat 9, be provided with thimble 8 and spring 10, on described countershaft 2, be also provided with described all gear 3 and be fixedly connected with fork 6, between described fork 6 and described thimble seat 9, be provided with first connecting rod 11 and second connecting rod 13, and be provided with universal joint 12 between described first connecting rod 11 and second connecting rod 13.
By stair-stepping concave surface 5 is set on main shaft 1, the groove 7 identical with all gear 4 numbers of teeth is set on countershaft 2, and between concave surface 5 and groove 7, thimble 8 is set, and the connecting rod that on the thimble seat outside thimble 89, setting is connected with fork 6, when fork 6 drives all gear 4 to select different rotational velocity, thimble 8 is brought to corresponding concave surface 5 places, when all gear 4 by the process of trapezoidal gear driven in, thimble 8 drops in concave surface 5, countershaft 2 is not had to position-limiting action, countershaft 2 rotates under the drive of all gear 4, when all gear 4 leaves the teeth 31 of trapezoidal gear, thimble 8 just in time turns to the edge of concave surface 5, in the process being rotated further at main shaft 1, the lower end of thimble 8 contacts with the convex surface of main shaft 1, thimble 8 is by jack-up, insert in groove 7 upper end, thereby countershaft 2 is played to spacing function, prevent that it is because inertia is rotated further, when main shaft 1 turns to the second circle, the teeth 31 of trapezoidal gear 3 drive all gear 4 again, and now, thimble 8 is under the effect of the first spring 10, under it, correct and turn to the edge that enters concave surface 5, thereby the spacing cancellation to countershaft 2.
In the present embodiment, connecting rod comprises first connecting rod 11 and second connecting rod 13, between two connecting rods, by universal joint 12, connect, the free end of second connecting rod 13 is connected with fork 6, when fork 6 lifts, in the process that drive all gear 4 moves, second connecting rod 13 is lifted, on first connecting rod 11, be also fixedly connected with pole 15, the free end of described pole 15 is connected with the first keyway of speed change gear casing (not shown) inwall, therefore in the process being lifted at second connecting rod 13, the position of first connecting rod 11 does not change, and in the process that fork 6 drive second connecting rods 13 move left and right, first connecting rod 11 drives thimble seat 9 to move horizontally along the first keyway, therefore thimble seat 9 and 8, thimble can be moved in the horizontal direction.
On described countershaft 2, be provided with many second keyways 21 consistent with described trapezoidal gear 3 length, described all gear 4 can be along described the second keyway 2) mobile, guaranteed that all gear 4 can move along the second keyway 21, not only be convenient to the movement of all gear 4, can also avoid the relative countershaft 2 of all gear 4 that circumferential slip occurs simultaneously.
The lower end of described thimble 8 is also provided with bearing 14, when the relative main shaft 1 of thimble 8 is slided, is rolling friction, has reduced the working life that frictional force has improved thimble 8 and main shaft 1
In the present embodiment, teeth 31 quantity of trapezoidal gear 3 are 6, and the speed change gear that the utility model provides can be realized 6 grades of speed changes.
In sum, a kind of speed change gear that the utility model provides, can realize speed Control easily, and simple in structure, with low cost.
In sum, the utility model provides a kind of speed change gear, and the crawler belt rotation realization feeding simultaneously up and down by synchronized rotation, guarantees that upper and lower cloth feed rate is consistent, improves sewing quality.
More than show and described basic principle of the present utility model, major character and advantage.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is by appending claims and equivalent circle thereof.
Claims (6)
1. a speed change gear, comprise by motor-driven main shaft (1) and countershaft (2), it is characterized in that: on described main shaft (1), be fixedly installed trapezoidal gear (3), described trapezoidal gear (3) is upper is circumferentially provided with a plurality of teeth (31) along it, length difference between described adjacent two teeth (31) is consistent, described countershaft (2) is upper to be arranged and described trapezoidal gear (3) all gear that be meshed, that position is corresponding (4), and described all gear (4) can move along its length relative to described countershaft (2).
2. a kind of speed change gear according to claim 1, it is characterized in that: on described countershaft (2), be also provided with the groove (7) that quantity is identical with the number of teeth of described all gear (4), on described main shaft (1), be provided with corresponding with described groove (7) position, the stepped concave surface (5) that length is consistent, and the step number of described stepped concave surface (5) is consistent with teeth (31) quantity of described trapezoidal gear (3), between described stepped concave surface (5) and described groove (7), be provided with thimble seat (9), in described thimble seat (9), be provided with thimble (8) and spring (10), on described countershaft (2), be also provided with described all gear (3) and be fixedly connected with fork (6), between described fork (6) and described thimble seat (9), be provided with first connecting rod (11) and second connecting rod (13), and be provided with universal joint (12) between described first connecting rod (11) and second connecting rod (13).
3. a kind of speed change gear according to claim 2, is characterized in that: on described first connecting rod (11), be also fixedly connected with pole (15), the free end of described pole (15) is connected with the first keyway of speed change gear casing inner wall.
4. a kind of speed change gear according to claim 3, is characterized in that: on described countershaft (2), be provided with many second keyways (21) consistent with described trapezoidal gear (3) length, described all gear (4) can be mobile along described the second keyway (21).
5. a kind of speed change gear according to claim 4, is characterized in that: the lower end of described thimble (8) is also provided with bearing (14).
6. a kind of speed change gear according to claim 5, is characterized in that: teeth (31) quantity of described trapezoidal gear (3) is 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420210479.7U CN203906675U (en) | 2014-04-28 | 2014-04-28 | Speed variator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420210479.7U CN203906675U (en) | 2014-04-28 | 2014-04-28 | Speed variator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906675U true CN203906675U (en) | 2014-10-29 |
Family
ID=51780956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420210479.7U Expired - Fee Related CN203906675U (en) | 2014-04-28 | 2014-04-28 | Speed variator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203906675U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559456A (en) * | 2017-08-11 | 2018-01-09 | 武汉科技大学 | Reaction type numeral reversal valve is driven in a kind of |
-
2014
- 2014-04-28 CN CN201420210479.7U patent/CN203906675U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559456A (en) * | 2017-08-11 | 2018-01-09 | 武汉科技大学 | Reaction type numeral reversal valve is driven in a kind of |
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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 |
Granted publication date: 20141029 Termination date: 20150428 |
|
| EXPY | Termination of patent right or utility model |