CN202719091U - Gear ratio device - Google Patents
Gear ratio device Download PDFInfo
- Publication number
- CN202719091U CN202719091U CN 201120480929 CN201120480929U CN202719091U CN 202719091 U CN202719091 U CN 202719091U CN 201120480929 CN201120480929 CN 201120480929 CN 201120480929 U CN201120480929 U CN 201120480929U CN 202719091 U CN202719091 U CN 202719091U
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- floating ring
- roller bearing
- sheave
- groove
- ring
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Abstract
The utility model discloses a gear ratio device, and relates to a new method for changing speed through a mechanical system, aiming at solving the problems of large radial component force, small overlap ratio, interference of a primary change gear with a high gear ratio and large size of a gear shifting mechanism existing in the conventional method for changing the gear ratio by using a gear. According to the gear ratio device, a system consists of a grooved wheel, an inner grooved wheel, an output disc, a torque transfer pin, a floating ring, an outer floating ring, an unloading ring, a rolling shaft, a groove ring and a shell, wherein the problem of interference in movement is solved by a curve on a groove of the groove ring and an overlap ratio which is tens of times higher than that of a well-known gear shift method is obtained. The problem of full unloading of acting force of the rolling shaft is solved through an inner floating ring and the outer floating ring. The force acting on an input shaft by the grooved wheel and an inner groove supported against a supporting sleeve is extremely small and even zero by keeping small pressure and even zero pressure of the grooved wheel and the wheel groove of the inner groove.
Description
Technical field
The gear ratio device: by sheave, the groove circle of input shaft, axially stack, roller bearing, change speed ratio, moment of torsion.The radial component that causes because of pressure angle that this new method can be avoided occurring in the traditional gear transmission process and the bulky shortcoming of mechanism that causes because contact ratio is little.
Background technique
Gear ratio device: be to be 201010571185.3 at number of patent application; Patent name is the new method that opens on the basis of pure rolling zero-pressure angle driving system.
Summary of the invention
The pure rolling zero-pressure angle driving system fails really to solve in the movement process, and roller bearing is to the interference of groove circle; To enter and withdraw from the groove ring recess be to finish by the distortion of elastic ring to roller bearing in the movement process.Instantaneous arbitrarily, to the circumference of roller bearing and radially inaccurate location.The gear ratio device is under the prerequisite that roller bearing is accurately located, and the roller bearing number that participates in simultaneously engagement can reach 1/2 of sheave groove number.This is that any method for changing speed can not be compared in the past.The pure rolling zero-pressure angle driving system reduces radial component and is to realize by the method that reduces groove circle pressure angle, can cause interference in the roller bearing motion and reduce groove circle pressure angle.The gear ratio device is with the method for unloading, and the power of effect on the sheave is cancelled each other to be unloaded to the power on the floating ring on the housing on the floating ring and by outer floating ring, unloading circle.Roller bearing is very little to the pressure angle on the sheave groove, even can be zero.Input shaft is stressed very little even not stressed.
Technical barrier:
1. the radial location of the circumferential registration of any instantaneous roller bearing, roller bearing.
2. the roller bearing motion is to the envelope curver of groove circle.
3. the power that roller bearing is acted on floating ring, the outer floating ring is unloaded on the housing
The scheme of a technical solution difficult problem:
Below all use the instantaneous position of polar coordinate representation roller bearing.
1. determine the roller bearing circumferential position with following methods: sheave, interior sheave end face be by the speed ratio requirement, equal angles some grooves that roller bearing changes radial position that hold that distribute, and roller bearing can move along radial direction in sheave, inside groove race.Any instantaneous roller bearing maintenance and sheave, inside groove wheel cell wall is tangent.Sheave, inside groove wheel cell wall are determined the polar angle of roller bearing.
2. determine the roller bearing radial position with following methods: the outer floating ring of floating ring is mounted respectively in the roller bearing medial and lateral, and any instantaneous roller bearing keeps tangent with the endoporus of outer floating ring with the tangent while of outer cylinder of floating ring.Floating ring, outer floating ring are determined the utmost point footpath of roller bearing jointly.
Determine the envelope curver (being groove circle curve) to satisfying 1.2. two condition roller bearings.
3. make roller bearing groove circle envelope curver in order to the below legal system: the groove on the groove circle can free in and out for roller bearing.On the groove ring recess wall curve any point all not with determine polar angle by sheave, inside groove wheel cell wall and float, the outer floating ring of circle determines that the roller bearing in the utmost point motion directly interferes.
4. with the unloading of following methods solution to the roller bearing active force: floating ring, outer floating ring, unloading circle, outer floating ring outer cylinder is rolled in unloading circle hole, the roller bearing of motion acts on the power on the floating ring, pass to outer floating ring by roller bearing, roller bearing acts on the power on the floating ring under the acting in conjunction that outside floating ring, unloading enclosed, and all is unloaded on the housing.
The gear ratio device is divided into two system's one input systems and output system.Each system has a function.
Input system mainly is comprised of loam cake, input shaft, supporting sleeve, sheave, interior sheave, output disc, moment of torsion transmission pin, floating ring, outer floating ring, unloading circle, roller bearing, groove circle, housing.The function of input system is that the circular motion with input shaft converts sheave to, interior sheave, output disc, revolution and rotation around the groove circle center of circle.Namely finish from the input shaft to the sheave, the speed change of interior sheave with become moment of torsion
The function of input system, realize by the following method, the circular motion of input shaft, bearing by the input shaft eccentric part promotes supporting sleeve, be installed on the supporting sleeve outer cylinder, all connected by moment of torsion transmission pin, sheave, interior sheave, supported cover promote, finish revolution and rotation around the groove circle center of circle under the effect of roller bearing and groove circle.The rotation of sheave, interior sheave passes to output disc by moment of torsion transmission pin.
Its output system mainly is comprised of output disc, porose disc, retainer, driving block, output shaft, lower cover, and the function of output system is: with sheave, interior sheave is around revolution and the rotation in the groove circle center of circle.Convert the circular motion of output shaft to.Realize that this function has two kinds of methods
The first: the motion of output disc, by porose disc, retainer, driving block, with revolution and the rotation around the groove circle center of circle of sheave, interior sheave.Convert the circular motion of output shaft to.
It two is: use traditional method namely to use bearing pin, guide, porose disc with sheave, interior sheave is around revolution and the rotation in the groove circle center of circle.Convert the circular motion of output shaft to.
Above measure can realize, without radial component, high contact ratio, simple and compact for structure, little, the high efficiency speed variator system of volume.
Description of drawings
Fig. 1 is the structural drawing of gear ratio device.
Fig. 2 is the A-A sectional view (this view is rotated by 90 degrees) of Fig. 1
Fig. 3, Fig. 4, Fig. 5 be Fig. 2 partial enlarged drawing (for representing sheave, groove circle, floating ring, outer floating ring, unloading circle, relation, (wherein sheave, outer floating ring are regarded as transparency with double dot dash line).Roller bearing in the view all is in engagement.Can find out that its contact ratio is big.
Fig. 6 is the B-B sectional view (this view is rotated by 90 degrees) of Fig. 1
Fig. 7 is the C-C partial sectional view of Fig. 6
Below in conjunction with accompanying drawing gear ratio device embodiment is elaborated:
Among the figure: input shaft [1], bearing spacer [2], loam cake [3], roller bearing gear [4], supporting sleeve [5], sheave [6] floating ring [7], roller bearing [8], groove circle [9], housing [10], housing pin [11], unloading circle [12], outer floating ring [13], interior sheave [14], groove circle gear [15], output disc [16], porose disc [17], output shaft [18], lower cover [19], moment of torsion transmission pin [20], retainer [21], driving block [22], rolling element [23].
Embodiment
Gear ratio device embodiment such as Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, circle 6, shown in Figure 7:
Input shaft [1]: by, top-down six sections axial workpieces that cylindrical body is superimposed as.
The top-down six sections cylinders of input shaft [1] (following first cylinder that is referred to as respectively ... the 6th cylinder) wherein are processed with keyway on the first cylinder.The second cylinder cooperates with bearing inner ring in being installed in loam cake [3] hole.Three cylindrical is the step of the downward degrees of freedom of restriction bearing.The 4th cylinder outside diameter is the cylinder of diameter maximum in each cylinder of input shaft [1].The 5th cylinder does not overlap (being referred to as eccentric part) with upper other each section cylinder center of circle line of input shaft [1] and cooperates with ring in the middle (center) bearing of supporting sleeve [5] hole.The 6th cylinder cooperates with bearing inner ring in the output shaft hole.Except eccentric part, other all cylindrical body central lines.
Bearing spacer [2] is the cover parts that outer cylinder and hole are superimposed as.
Bearing spacer [2] is used for the degrees of freedom under the hoop in the middle (center) bearing of restriction supporting sleeve [5] hole.
Loam cake [3]: the part that is superimposed as by truncate normal cone body, two cylindrical bodys and supercentral step hole.[3] two cylindrical bodys of loam cake are upper end cylindrical body, lower end cylindrical body.Loam cake [3] upper end cylindrical body end face evenly distributes, and several can penetrate the step hole of hexagon socket head cap screw.Loam cake [3] lower end cylindrical body is the rim of the mouth that cooperates with housing [10] upper end hole.Loam cake [3] center top-down processing has three concentric step holes.Three step holes on the loam cake [3] are respectively; Oil sealing is installed, bearing is installed, hold roller bearing gear [4] and hold the hole that the top sheave [6] moves therein.
Roller bearing gear [4]: the part that is superimposed as by large and small cylinder and supercentral hole.
The cylindrical place of its small column can hold roller bearing [8] in the centripetal groove of sheave [6] axial grow part, the axial freedom that the big column restriction roller bearing [8] of roller bearing gear [4] makes progress.Roller bearing gear [4] supercentral hole, bore dia is less than the interior circular diameter of supporting sleeve [5].Be used for the axial freedom that the outer race in restriction supporting sleeve [5] hole makes progress.Roller bearing gear [4] upper-end surface is processed with the step hole that interior six square bolts can be installed.
Supporting sleeve [5]: the part that is superimposed as by exterior circular column and supercentral step hole.
Its outer cylinder cooperates with sheave [6] and the supercentral hole of interior sheave [14].The supercentral hole of supporting sleeve [5] cooperates with outer race.There is the step that can limit the downward degrees of freedom of outer race the Kongzui lower end.The upper and lower end face of supporting sleeve [5] is processed with and roller bearing gear [4] and output disc [16] tapped hole corresponding to hole of topping bar.
Sheave [6], interior sheave [14]: centered by the porose disk-shaped part of processing.
The hole at sheave [6], interior sheave [14] center cooperates with the outer cylinder of supporting sleeve [5].For making all energy transmitting torques of each sheave [6], interior sheave [14], be processed with the hole of several mounting torque transmission pins [20] at sheave [6], interior sheave [14] end face.Sheave [6], interior sheave [14] difference are that interior sheave [14] outer cylinder diameter is less than outer floating ring [13] internal diameter.All roller bearings [8] in guaranteeing in the sheave [14] all can be tangent with the hole of outer floating ring [13].Sheave [6], interior sheave [14] end face be by the speed ratio requirement, equal angles some grooves that roller bearing changes radial position that hold that distribute, and roller bearing can move along radial direction in sheave, inside groove race.Any instantaneous roller bearing maintenance and sheave, inside groove wheel cell wall is tangent.Sheave, inside groove wheel cell wall are determined the polar angle of roller bearing.
Floating ring [7], outer floating ring [13]: the ring-shape accessory that is formed by endoporus and outer cylinder.
The outer cylinder of the total maintenance of roller bearing [8] and floating ring [7] and the endoporus of outer floating ring [13] are tangent.
Roller bearing [8] is elongated cylinder.
Groove circle [9]: by solid round and that interior several curvilinear grooves of circle are drawn into.
1. the curvilinear groove on the groove circle [9], quantity depends on speed ratio.On groove circle [9] the cell wall curve any point all not with
Determine that by sheave [6], interior sheave [14] cell wall polar angle reaches unsteady [7], the outer floating ring of circle [13] determines that the roller bearing in the utmost point motion directly interferes.Groove circle [9] external cylindrical surface is processed with several radiuses semicircle orifice identical with housing pin [11] radius.Groove circle [9] cylindrical cooperates with housing [10] upper end hole.The rotary freedom of housing pin [11] restriction sheave [9].
Housing [10]: by two parts that pin is superimposed as of two holes, outer cylinder and the stationary housings [10] at center.
Wherein two holes in the heart are respectively upper end hole and lower stomidium.Housing [10] upper end hole, respectively with loam cake [3] rim of the mouth, lower end, the cylindrical of groove circle [9], unloading circle [12] cooperates.Be processed with even distribution on the hole wall of housing [10] upper end hole and enclose semicircle orifice corresponding to first circular hole of [12] outer cylinder with groove circle [9], unloading.When housing pin [11] was installed in these corresponding semicircle orifices, housing [10] had limited groove circle [9], has unloaded the rotary freedom of circle [12].The lower stomidium of housing [10] cooperates with groove circle gear [15] cylindrical, rim of the mouth, lower cover [19] upper end respectively.The upper and lower end face of housing [10] is processed with several equally distributed tapped holes.Housing [10] upper-end surface tapped hole can be fastened to housing [10] upper-end surface with loam cake [3] by hexagon socket head cap screw.Housing [10] lower end surface tapped hole can be fastened to housing [10] lower end surface with lower cover [19] by hexagon socket head cap screw.Be stationary housing [10], be manufactured with two pin with mounting hole at housing [10].Can pass through bolt, nut housing [10] is fixing.
Housing pin [11]: be a cylindrical body.
Housing pin [11] radius equals on housing [10] upper end hole, the hole wall, the semicircle orifice radius on groove circle [9] and unloading circle [12] external cylindrical surface.Be used for limiting groove circle [9] to the rotary freedom of housing [10].
Unloading circle [12]: the part that is superimposed as by hole and outer cylinder.
The outer cylinder of unloading circle [12] cooperates with the upper end hole of housing [10].Unloading circle [12] external cylindrical surface is processed with several radiuses semicircle orifice identical with housing pin [11] radius.Be installed in the rotary freedom of housing pin [11] the restriction unloading circle [12] in the housing [10].
Groove circle gear [15]: the ring-shaped work pieces that is formed by endoporus and outer cylinder.
Groove circle gear [15] is used for the downward degrees of freedom of limiting groove circle [9].
Output disc [16]: the disk-shaped part that is superimposed as by outer cylinder and hole.
Output disc [16] center is processed with and can makes therein free-moving hole of bearing spacer [2].Output disc [16] end face is processed with several and the hole that cooperates of moment of torsion transmission pin [20].Output disc [16] lower end surface is processed with the step hole corresponding with supporting sleeve [5] tapped hole, output disc [16] can be fastened to supporting sleeve [5] end face by interior six square bolts.Also process the hole that several can install retainer [21] on output disc [16] end face.Each can install the retainer [21] that a band rolling element [23] is installed in the hole of retainer [21].The driving block [22] of porose disc [17] upper-end surface projection is clamped between the rolling element [23] that is installed in retainer [21] groove.
Porose disc [17]: the part that is formed by stacking by hole and outer cylinder.
Porose disc [17] center is processed with and holds bearing spacer [2], therein free-moving hole.Porose disc [17] end face is processed with respectively several square holes with two mutually perpendicular center line symmetries.Porose disc [17] upper-end surface and lower end surface all have upwards with to lower convexity and mutually perpendicular driving block [22], be installed in the square hole of porose disc [17].
Output shaft [18]: by upper and lower end cylindrical body, and the upper end axial workpiece that forms of supercentral step hole.
The upper-end surface of output shaft [18] upper end cylinder is processed with the hole that several can install retainer [21].Each can be installed in the hole of retainer [21], but the retainer [21] of mounting strap rolling element [23].The driving block [22] of porose disc [17] lower end projection is clamped between the rolling element [23] that is installed in retainer [21] groove.Center, output shaft [18] upper end is processed with and the hole that is installed in input shaft [1] the 6th cylinder upper bearing (metal) outer shroud and cooperates.Output shaft [18] lower end cylinder is equipped with bearing, and this outer race cooperates with lower cover [19] upper end hole, also is processed with keyway on the cylinder of output shaft [18] lower end.
Lower cover [19]: by three cylindrical bodys and supercentral two parts that step hole is superimposed as.
Cylindrical rim of the mouth, lower cover [19] upper end cooperates with the lower stomidium of housing [10].Lower cover [19] mediate cylindrical lower end surface is processed with several step holes corresponding with housing [10] lower end surface tapped hole, and can by the hexagon socket head cap screw in these several step holes, lower cover [19] be fastened to housing [10] lower end surface.In supercentral two step holes of lower cover [19], the hole of upper end cooperates with outer race on being installed in output shaft [19].It is Kong Zhongke installation oil sealing bottom.
Moment of torsion transmission pin [20]: be a cylindrical body.
Moment of torsion transmission pin [20] passes all sheaves [6], interior sheave [14], and the moment of torsion transmission pin [20] by being connected with output disc [16], and the moment of torsion of all sheaves [6], interior sheave [14] is passed to output disc [16].Retainer [21]:
Two solids that the Shen that closed figure draws that forms for the upper symmetrical string of the circle on the plane and this circle becomes, these two solids are in aggregates by a bit of cylinder connection again.Be processed with the groove that can hold rolling element [23] on two planes by the string stretching.
Driving block [22]: be a hexahedron.
Driving block [a 22] part is installed on the porose disc [17], and another part is clamped between the rolling element [23] that is installed in retainer [21] groove.
Rolling element [23]: be a cylindrical body.Its effect is as the needle roller in the needle bearing.
Assembling
Divided for 5 steps finished:
1. bearing is installed in supporting sleeve [5] hole:
Two outer races are installed in supporting sleeve [5] hole, outer race is touched at supporting sleeve [5] lower end, hole step.
2. on output disc [16], install successively and sheave [6], part that interior sheave [14] is relevant:
Output disc [16] is fastened on the lower end surface of supporting sleeve [5] by interior six square bolts.With output disc [16] horizontal positioned, in the face of output disc [16] upper end behind the mounting torque transmission pin [20], layering is installed successively in the following order, sheave [6], floating ring [7], groove circle [9], interior sheave [14], outer floating ring [13], unloading circle [12]------sheave [6].Supporting sleeve [5] outer cylinder is installed in sheave [6], the supercentral hole of interior sheave [14].Can hold in the groove that roller bearing [8] changes radial position at groove circle [6], inside groove circle [14] roller bearing [8] is installed.By the hexagon socket head cap screw in the step hole of roller bearing gear [4] upper-end surface roller bearing gear [4] is fastened to supporting sleeve [5] upper-end surface.
3. input shaft [1] is installed:
At input shaft [1] second cylinder bearing inner ring is installed.At input shaft [1] eccentric part bearing inner ring is installed.Input shaft [1] inserted in the bearing inner ring on the eccentric part that guarantees to make input shaft [1] in supporting sleeve [5] hole, with the correct assembling of outer race in supporting sleeve [5] hole.Eccentric part lower end at input shaft [1] is installed bearing spacer [2], at input shaft [1] the 6th cylinder bearing inner ring is installed.
With above mounted all fitting turnover 180 degree.Can hold in the groove of rolling element [23] at retainer [21], coating butter is also installed rolling element [23].At the upper and lower biend of porose disc [17] driving block [22] is installed.The retainer [21] of mounting strap rolling element [23] is to driving block [22].Retainer [21] is installed to output disc [16] in the lump together with driving block [22] can be installed in the hole of retainer [21].(in supercentral hole, output shaft [18] upper end, outer race is installed, at output shaft [18] lower end cylindrical body bearing inner ring is installed).Use the same method the retainer [21] of porose disc [17] lower end surface driving block [22], band rolling element [23], be installed to output shaft [18] upper-end surface and can install in the hole of retainer [21].Guarantee simultaneously the correct assembly relation of ring in outer race in the center hole of output shaft [18] upper-end surface and input shaft [1] the 6th cylinder upper bearing (metal).After the complete above assembling, all mounted parts are referred to as (parts 1).
4. parts 1 are installed on the housing [18]:
Mounting groove circle gear [15] in the stomidium under housing,
Output shaft on the parts 1 [18] is inserted lower cover [19], the assembly relation that the bearing inner ring on the cylindrical body of assurance output shaft [18] lower end and the outer race in lower cover [19] hole are correct.Semicircle orifice on the hole wall of housing [10] upper end and semicircle orifice on groove circle [9], unloading circle [12] outer cylinder are aligned, with shell [11] cover install to groove circle [9], unloading is enclosed on the outer cylinder of [12].Enclose holder housing pin [11] between [12] outer cylinder semicircle orifice at the semicircle orifice on housing [10] hole wall and groove circle [9], unloading.The tapped hole of housing [10] lower end surface and the step hole of lower cover [19] mediate cylindrical lower end surface are aligned, and penetrate hexagon socket head cap screw, by hexagon socket head cap screw lower cover [19] is fastened on housing [10] lower end surface.Oil sealing is installed to lower cover [19] bottom in the hole.
5. loam cake [3] is installed:
Oil sealing and outer race are installed in the step hole of loam cake [3] center.Loam cake [3] is installed to the housing upper end, loam cake [3] rim of the mouth, lower end is cooperated with housing [10] upper end hole.Guarantee the correct assembly relation that holds the outer race in interior ring and loam cake [3] hole on input shaft [1] second cylinder.Step hole on the cylindrical body of loam cake [3] upper end and the tapped hole on housing [10] upper-end surface are aligned.By the hexagon socket head cap screw in the cylindrical body step hole of loam cake [3] upper end loam cake [3] is fastened in the tapped hole of housing [10] upper end.
Go on foot the assembling of having finished the gear ratio device by above 5.
During input shaft [1] rotation, the bearing of input shaft [1] eccentric part promotes supporting sleeve [5], and supporting sleeve [5] outer cylinder promotes sheave [6], interior sheave [14] revolves round the sun around groove circle [9] center line; Roller bearing [8] enters the curvilinear groove of groove circle [9] under floating ring [7] effect.The roller bearing that enters in groove circle [9] groove enters engagement.Under the acting in conjunction of roller bearing [8] and groove circle [9], promote sheave [6], interior sheave [14] rotation.In the time of the motion of sheave [6], interior sheave [14], outside under the effect of floating ring [13], make to be about to out-of-gear roller bearing [8] and to pull out the groove ring recess.
The rotation of the interior sheaves of several sheaves [6] [14] passes to output disc [16] by moment of torsion transmission pin [20].Output disc [16] passes motion to output shaft [18] again by the driving block on the porose disc [22].Finish by the moment of torsion transmission that is input to output.
Claims (4)
1. the gear ratio device is divided into two systems, input system and output system, each system has a function, input system mainly by, loam cake, input shaft, supporting sleeve, sheave, interior sheave, output disc, moment of torsion transmission pin, floating ring, outer floating ring, the unloading circle, roller bearing, the groove circle, housing forms, its output system is main, by output disc, porose disc, retainer, rolling element, driving block, output shaft, lower cover forms, it is characterized in that, on the described groove ring recess wall curve any point all not with by sheave, inside groove wheel cell wall is determined polar angle and floating ring, outer floating ring determines that the roller bearing in the utmost point motion directly interferes.
2. gear ratio device according to claim 1, it is characterized in that: described sheave, interior sheave end face are by the speed ratio requirement, the some grooves that hold roller bearing change radial position of equal angles distribution, roller bearing can move along radial direction in sheave, inside groove race, any instantaneous roller bearing maintenance and sheave, inside groove wheel cell wall is tangent, and sheave, inside groove wheel cell wall are determined the polar angle of roller bearing.
3. gear ratio device according to claim 1, it is characterized in that: described floating ring, outer floating ring are mounted respectively in the roller bearing medial and lateral, any instantaneous roller bearing keeps tangent with the endoporus of outer floating ring with the tangent while of outer cylinder of floating ring, and floating ring, outer floating ring are determined the utmost point footpath of roller bearing jointly.
4. gear ratio device according to claim 1, it is characterized in that: described outer floating ring outer cylinder is rolled in unloading circle hole, the roller bearing of motion acts on the power on the floating ring, pass to outer floating ring by roller bearing, roller bearing acts on the power on the floating ring under the acting in conjunction that outside floating ring, unloading enclosed, and all is unloaded on the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120480929 CN202719091U (en) | 2011-11-28 | 2011-11-28 | Gear ratio device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120480929 CN202719091U (en) | 2011-11-28 | 2011-11-28 | Gear ratio device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202719091U true CN202719091U (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120480929 Expired - Fee Related CN202719091U (en) | 2011-11-28 | 2011-11-28 | Gear ratio device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202719091U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133617A (en) * | 2011-11-28 | 2013-06-05 | 于杰 | Novel method of changing speed ratio |
-
2011
- 2011-11-28 CN CN 201120480929 patent/CN202719091U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133617A (en) * | 2011-11-28 | 2013-06-05 | 于杰 | Novel method of changing speed ratio |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130206 Termination date: 20151128 |