TWI644043B - Pulley set for shifting mechanism - Google Patents

Abstract

A pulley set for a shifting mechanism, suitable for a belt, and comprising a first half wheel and a second half wheel. The first half wheel includes a first shaft sleeve that is sleeved by the belt, and at least one bolt disposed on the first shaft barrel. The second half wheel includes a second shaft barrel slidably sleeved on the first shaft barrel of the first half wheel, and the second shaft barrel is provided with at least one groove corresponding to the bolt, the bolt It is slidable along the corresponding groove, wherein one of the grooves of the groove includes a cubic curve segment.

Description

Pulley set for shifting mechanism

The present invention relates to a pulley set, and more particularly to a pulley set for a shifting mechanism.

Referring to Figures 1 and 2, the prior art axleless mechanism for a vehicle includes a torsion cam 11, a clutch pack 12, and a planar rotating assembly 13. The plane rotating group 13 is provided with a plurality of pins 131, and the torsion cams 11 are provided with a plurality of grooves 111 respectively corresponding to the pins 131. When a belt (not shown) changes the diameter of the rear axle belt due to the action of the front axle (not shown), the function of the stepless shifting can be achieved.

As shown in FIG. 2, the groove 111 of the above-mentioned torsion cam 11 is a torsion sensing mechanism, and the shifting section pattern 112 is generally formed by a straight line-arc or a straight line-arc-straight type, which enables stepless shifting. The system automatically adjusts the torque output according to changes in external load.

Referring to FIGS. 3, 4, and 5, a shift section graphic 112 of a shift section formed by a linear-arc-linear type is taken as an example, and includes a front straight section 113, a rear straight section 114, and a pair of ends respectively The front end straight section 113 and the rear end straight section 114 are tangentially connected to the arc segment 115. However, the two ends of the circular arc segment 115 are tangent to the straight line segment 113 and the rear end straight line segment 114, respectively, but the function of the shift interval pattern 112 is differentiated once to obtain a slope function pattern 116 as shown in FIG. The two connection points 117, 118 show that the slope transformation process is not smooth. Furthermore, after further differentiating the slope function pattern 116 of FIG. 4, as shown in FIG. 5, it is apparent that there is a discontinuity at the joint, that is, such a line-arc-linear type The shift interval pattern 112 of the shift section has the disadvantage that the slope of the shifting process is not smooth. Therefore, it is necessary to seek a solution.

[Problems to be solved by the invention]

Accordingly, it is an object of the present invention to provide a pulley set for a shifting mechanism.

[Technical means to solve the problem]

Thus, the pulley set for a shifting mechanism in the technique of claim 1 of the present invention is applicable to a belt and includes a first half wheel and a second half wheel. The first half wheel includes a first shaft sleeve that is sleeved by the belt, and at least one bolt disposed on the first shaft barrel. The second half wheel includes a second shaft barrel slidably sleeved on the first shaft barrel of the first half wheel, and the second shaft barrel is provided with at least one groove corresponding to the bolt, the bolt It is slidable along the corresponding groove, wherein one of the grooves of the groove includes a cubic curve segment.

A pulley set for a shifting mechanism in the technique of claim 2, wherein the cubic curved section includes two distinct and connected cubic curves, and the two differentials of the cubic curved section generate two A continuous line of strips connected.

A pulley set for a shifting mechanism in the technique of claim 3, wherein the shifting section pattern further includes a front end straight section tangentially coupled to the front end of the cubic curved section, and the shifting interval pattern is once After the differentiation, a slope function is generated, the slope function including a front end straight portion, and a quadratic curve segment still connected tangentially to the front end straight portion.

The pulley set for a shifting mechanism in the technique of claim 4 of the present invention, which differentiates the slope function, produces two consecutive straight lines connected.

A pulley set for a shifting mechanism in the technique of claim 5, wherein the cubic curve segment comprises two distinct and connected cubic curves, and after the differential function is differentiated, three connected phases are generated. Continuous straight line.

A pulley set for a shifting mechanism in the technique of claim 6 of the present invention, wherein the shifting interval pattern further includes a rear end straight section tangentially coupled to the rear end of the cubic curved section, and the shifting interval pattern A differential function is generated after a differential, the slope function including a rear end straight line portion, and a quadratic curve segment still tangentially connected to the rear end straight line portion.

The pulley set for a shifting mechanism in the technique of claim 7 of the present invention, which differentiates the slope function, produces two consecutive straight lines connected.

In the pulley group for a shifting mechanism in the technique of the eighth aspect of the patent, the cubic curve segment includes two distinct and connected cubic curves, and after the differential function is differentiated, three consecutive continuous lines are generated. .

A pulley set for a shifting mechanism in the technique of claim 9 of the present invention, the shifting section pattern further comprising a front end straight section tangentially connected to the front end of the cubic curved section, and a tangently connected a rear end straight line segment at the rear end of the cubic curve segment, the cubic curve segment includes two distinct and connected cubic curves, and a slope function is generated when the shift interval pattern is first differentiated, the slope function including a front end a straight portion, a rear end straight portion, and a quadratic curved segment whose ends are still tangentially connected to the front straight portion and the rear straight portion, respectively.

The pulley set for a shifting mechanism in the technique of claim 10 of the present invention, which differentiates the slope function, produces four consecutive straight lines connected.

[Effects of the Invention]

The effect of the invention in claim 1 is that the shifting performance can be improved.

The effect of the invention in claim 2 is to prevent the occurrence of abnormal sounds.

The effect of the invention in claim 3 is that the shifting smoothness can be improved and the occurrence of abnormal sounds can be prevented.

The effect of the invention by claim 4 is that the formation of the step can be avoided, so that the driver does not feel the faint feeling during the shifting process.

The effect of the invention by claim 5 is that the formation of the step can be avoided, so that the driver does not feel the faint feeling during the shifting process.

The effect of the invention in claim 6 is that the shifting smoothness can be improved and the occurrence of abnormal sounds can be prevented.

The effect of the invention by claim 7 is that the formation of the step can be avoided, so that the driver does not feel the faint feeling during the shifting process.

The effect of the invention by claim 8 is that the formation of the step can be avoided, so that the driver does not feel the faint feeling during the shifting process.

The effect of the invention in claim 9 is that the shifting smoothness can be improved and the occurrence of abnormal sounds can be prevented.

The effect of the invention in claim 10 is that the formation of the step can be avoided, so that the driver does not feel the faint feeling during the shifting process.

Referring to Fig. 6, the pulley set for a shifting mechanism of the present invention is applied to a belt (not shown) and is a rear axle mechanism of the shifting mechanism. When the belt changes the diameter of the rear axle belt due to the action of the front axle (not shown), the function of the stepless shifting can be achieved.

The pulley set includes a first half wheel 2 and a second half wheel 3. The first half wheel 2 includes a first shaft barrel 21 that can be sleeved by the belt, and at least one bolt 22 disposed on the first shaft barrel. In the embodiments of the present invention described below, the number of the latches 22 may be three as shown in FIG. 6, but the present invention is not limited thereto, but may be one, two, or more than three.

Referring to Figures 6 and 7, the second half wheel 3 includes a second barrel 31 that is slidably sleeved on the first barrel 21 of the first half wheel 2. The second barrel 31 is provided with at least one groove 310 corresponding to the pin 22 and defined by a shifting section pattern 311, and the pin 22 is slidable along the corresponding groove 310. In the embodiments of the present invention described below, the number of the grooves 310 may be three as shown in FIGS. 6 and 7 corresponding to the plug 22, but the present invention is not limited thereto, and may be one. , two, or more than three.

Referring to FIG. 8, in the first embodiment of the present invention, the shifting interval pattern 311 includes a front end straight line segment 312, a rear end straight line segment 313, and a pair of ends tangentially connected to the front end straight line segment 312 and thereafter. The cubic curve segment 314 of the end straight line segment 313.

In the first embodiment, the front end straight line segment 312 has an angle of 45 degrees, the rear end straight line segment 313 has an angle of 15 degrees, and the x coordinate of the intersection of the front end straight line segment 312 and the cubic curved portion 314 is 2.56 mm. And the x coordinate of the intersection of the back end straight line segment 313 and the cubic curve segment 314 is 13.77 mm.

In the first embodiment, the cubic curve segment 314 includes two distinct and connected cubic curves, that is, a cubic curve that is tangentially connected to the front straight segment 312: y=-0.0039x ^3+0.0298x^2+0.9236^x+0.0652, and a cubic curve after tangentially connecting to the back end straight line segment 313: y=0.0039x^3-0.1604x^2+2.4771^x-4.1629 Where x represents the axial displacement of the cam (in mm) and y represents the rotational displacement of the cam surface. Since the curve between the front straight line segment 312 and the rear end straight line segment 313 in the first embodiment adopts a cubic curve, the shifting performance can be improved.

Referring to Fig. 9, when the shift interval pattern 311 in Fig. 8 is differentiated once, a slope function 315, i.e., the cam surface rotational displacement gradient y', can be generated. The slope function 315 includes a front end straight portion 316, a rear end straight portion 317, and a quadratic curve segment 318 that is still tangentially connected to the front end straight portion 316 and the rear end straight portion 317, respectively. Improves shifting smoothness and prevents abnormal sounds from appearing.

Referring to FIG. 10, when the slope function 315 in FIG. 9 is further differentiated, four consecutive continuous lines 3191, 3192, 3193, and 3194, that is, the cam surface rotational displacement gradient y" can be generated, thereby avoiding the formation of the step difference. So that the driver does not feel tingling during the shifting process.

In addition, in a variation (not shown) of the first embodiment, the angle of the front straight line segment is 50 degrees, and the angle of the rear end straight line segment is 20 degrees, the front end straight line segment and the cubic curved segment The x coordinate of the intersection is 5.00mm, and the x coordinate of the intersection of the rear straight line segment and the cubic curve segment is 10.00mm, and the cubic curve of the front segment is y=-0.0221x^3+0.3311x^2-0.4638 ^x+2.7593, and the cubic curve of the latter stage is y=0.0221x^3-0.6622x^2+6.9862^x-15.8658.

Furthermore, in another variation (not shown) of the first embodiment, the angle of the front straight line segment is 50 degrees, and the angle of the rear straight line segment is 30 degrees, the front straight line segment and the cubic equation The x coordinate of the intersection of the curved segments is 5.23 mm, and the x coordinate of the intersection of the rear straight segment and the cubic curved segment is 14.54 mm, and the cubic curve of the preceding segment is y=-0.0047x^3+0.0741x^2 +0.8040^x+0.6760, and the cubic curve of the latter stage is y=0.0047x^3-0.2061x^2+3.5745^x-8.4530.

Referring to FIG. 11, in the second embodiment of the present invention, the global line segments of the shift interval pattern 311 are all cubic curve segments 314. The cubic curve segment 314 includes two distinct and connected cubic curves, namely a front cubic curve and a back cubic curve. Since the two different and connected cubic curves are used in the second embodiment, the shifting performance can be improved.

Referring to FIG. 12, when the shift interval pattern 311 in FIG. 11 is differentiated once, a slope function 315 can be generated. Since the global line segment of the slope function 315 is continuous and smooth, and has an inflection point 3151, the shift smoothness can be improved and the occurrence of abnormal sound can be prevented.

Referring to Figure 13, when the slope function 315 in Figure 12 is further differentiated, two consecutive continuous lines 3192, 3193 can be created. Therefore, the formation of the step difference can be avoided, so that the driver does not feel the faint feeling during the shifting process.

Referring to FIG. 14, in the third embodiment of the present invention, the shift interval pattern 311 includes a cubic curve segment 314 and a rear end straight segment 313. In the third embodiment, the cubic curve segment 314 includes two distinct and connected cubic curves, that is, a front cubic curve and a rear cubic curve. Since the cubic curve segment 314 is employed in the third embodiment, and the end straight segment 313 is tangentially connected to the cubic curve segment 314, the shifting performance can be improved.

Referring to Fig. 15, when the shift interval pattern 311 in Fig. 14 is differentiated once, a slope function 315 can be generated. Since the global line segment of the slope function 315 is continuous and smooth, and has an inflection point 3151, the shift smoothness can be improved and the occurrence of abnormal sound can be prevented.

Referring to Figure 16, after further differentiating the slope function 315 of Figure 15, three consecutive continuous lines 3192, 3193, 3194 can be created. Therefore, the formation of the step difference can be avoided, so that the driver does not feel the faint feeling during the shifting process.

However, in the variation of the third embodiment, the cubic curve segment 314 may also include only one cubic curve, and thus the inversion point graph 3111 does not generate the inflection point 3151 after the differential segment pattern 311 is differentiated once, and the slope is After the function 315 is further differentiated, only two consecutive straight lines are connected, which can improve the shifting performance, improve the shifting smoothness, prevent the occurrence of abnormal sounds, avoid the formation of the step difference, and prevent the driver from changing during the shifting process. I will feel blunt.

Referring to Fig. 17, in the fourth embodiment of the present invention, the shift interval pattern 311 includes a front end straight line segment 312 and a cubic curved portion. In the fourth embodiment, the cubic curve segment 314 includes two distinct and connected cubic curves, that is, a front cubic curve and a rear cubic curve. Since the cubic curve segment 314 is employed in the fourth embodiment, and the front straight segment 312 is tangentially coupled to the cubic curve segment 314, the shifting performance can be improved.

Referring to Fig. 18, when the shift interval pattern 311 in Fig. 17 is differentiated once, a slope function 315 can be generated. Since the global line segment of the slope function 315 is continuous and smooth, and has an inflection point 3151, the shift smoothness can be improved and the occurrence of abnormal sound can be prevented.

Referring to Figure 19, after further differentiating the slope function 315 of Figure 18, three consecutive continuous lines 3191, 3192, 3193 can be created. Therefore, the formation of the step difference can be avoided, so that the driver does not feel the faint feeling during the shifting process.

However, in the variation of the fourth embodiment, the cubic curve segment 314 may also include only one cubic curve, and thus the inversion point graph 3111 does not generate the inflection point 3151 after the differential segment pattern 311 is differentiated once, and the slope is After the function 315 is further differentiated, only two consecutive straight lines are connected, which can improve the shifting performance, improve the shifting smoothness, prevent the occurrence of abnormal sounds, avoid the formation of the step difference, and prevent the driver from changing during the shifting process. I will feel blunt.

In summary, the present invention has at least the following effects, so that the object of the present invention can be achieved:

The effect of the invention in claim 1 is that the shifting performance can be improved;

The effect of the invention in claim 2 is to prevent abnormal sounds from appearing;

The effect of the invention in claim 3 is that the shifting smoothness can be improved and the occurrence of abnormal sounds can be prevented;

The effect of the invention by claim 4 is that the formation of the step can be avoided, so that the driver does not feel the faint feeling during the shifting process;

The effect of the invention by claim 5 is that the formation of the step can be avoided, so that the driver does not feel the faint feeling during the shifting process;

The effect of the invention in claim 6 is that the shifting smoothness can be improved and the occurrence of abnormal sounds can be prevented;

The effect of the invention by claim 7 is that the formation of the step can be avoided, so that the driver does not feel the faint feeling during the shifting process;

The effect of the invention by claim 8 is that the formation of the step can be avoided, so that the driver does not feel the faint feeling during the shifting process;

The effect of the invention in claim 9 is that the shifting smoothness can be improved and the occurrence of abnormal sounds can be prevented;

The effect of the invention in claim 10 is that the formation of the step can be avoided, so that the driver does not feel the faint feeling during the shifting process.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the simple equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still Within the scope of the invention patent.

112·· Conventional shifting interval pattern 2····· The first half wheel 21··· The first shaft barrel 22··· The bolt 3····· The second half wheel 31··· The second shaft barrel 310 ·· 槽 311········································································································ · Rear end straight section 318·· Quadratic curve section 3191· Straight line 3192· Straight line 3193· Straight line 3194· Straight line

Other features and advantages of the present invention will be apparent from the embodiments of the drawings, wherein: FIG. 1 is an exploded perspective view showing a conventional rear axle mechanism for a vehicle. FIG. 3 is a perspective view showing a torsion cam in the rear axle mechanism of the conventional vehicle; FIG. 3 is a functional graph illustrating a conventional shift interval pattern; FIG. 4 is a functional graph illustrating the conventional shifting of FIG. The slope function obtained by differentiating the function of the interval graph; FIG. 5 is a function graph illustrating the result obtained by differentiating the slope function of FIG. 4; FIG. 6 is an exploded perspective view showing the shifting mechanism of the present invention. The pulley set includes a first half wheel and a second half wheel; FIG. 7 is a perspective view illustrating the second half wheel of FIG. 6; FIG. 8 is a function diagram illustrating the second half of the second half wheel of the present invention. The first embodiment of the shift interval pattern of the groove of the barrel, and the above-described conventional shift interval pattern; FIG. 9 is a function graph illustrating the slope function obtained by differentiating the function of the shift interval pattern of FIG. FIG. 10 is a function graph illustrating the result obtained by differentiating the slope function of FIG. 9. FIG. 11 is a function graph illustrating the shift interval pattern of the groove of the second shaft barrel of the second half wheel of the present invention; Second Embodiment; FIG. 12 is a function graph illustrating a slope function obtained by differentiating the function of the shift interval pattern of FIG. 11; FIG. 13 is a function graph illustrating the differentiation obtained by the slope function of FIG. Figure 14 is a functional diagram illustrating a third embodiment of the shift interval pattern of the groove of the second barrel of the second half wheel of the present invention; Figure 15 is a functional graph illustrating the shifting of Figure 14 The slope function obtained after the function of the interval graph is differentiated once; FIG. 16 is a function graph illustrating the result obtained by differentiating the slope function of FIG. 15; FIG. 17 is a function graph illustrating the second half wheel in the present invention. A fourth embodiment of the shift interval pattern of the groove of the second barrel; FIG. 18 is a function graph illustrating the slope function obtained by differentiating the function of the shift interval pattern of FIG. 17; and FIG. 19 is a function Shaped, the results described in FIG. 18 as a function of the slope of the resulting differential.

Claims (10)

A pulley set for a shifting mechanism, suitable for a belt, and comprising: a first half wheel, including a first shaft sleeve for the belt sleeve, and at least one bolt disposed on the first shaft barrel And a second half wheel comprising a second shaft sleeve slidably sleeved on the first shaft barrel of the first half wheel, the second shaft barrel being provided with at least one groove corresponding to the bolt The pin is slidable along the corresponding groove, wherein one of the grooves of the groove includes a cubic curve segment. The pulley set for a shifting mechanism according to claim 1, wherein the cubic curved section comprises two distinct and connected cubic curves, and the two differentials of the cubic curved section generate two phases. Continuous line. The pulley set for a shifting mechanism according to claim 1, wherein the shifting interval pattern further includes a front end straight line section tangentially connected to the front end of the cubic curved section, and is generated when the shifting interval pattern is first differentiated A slope function comprising a front end straight line portion and a quadratic curve segment still tangentially connected to the front end straight line portion. A pulley set for a shifting mechanism according to claim 3, wherein after the differential function is differentiated, two consecutive straight lines are connected. A pulley set for a shifting mechanism according to claim 3, wherein the cubic curved section comprises two distinct and connected cubic curves, and after the differential function is differentiated, three consecutive straight lines are connected. The pulley set for a shifting mechanism according to claim 1, wherein the shifting interval pattern further includes a rear end straight line section tangentially connected to the rear end of the cubic curved section, and when the shifting interval pattern is once differentiated A slope function is generated, the slope function including a rear end straight line portion and a quadratic curve segment still tangentially connected to the rear end straight line portion. A pulley set for a shifting mechanism according to claim 6, wherein after the differential function is differentiated, two consecutive straight lines are connected. A pulley set for a shifting mechanism according to claim 6, wherein the cubic curved section comprises two distinct and connected cubic curves, and after the differential function is differentiated, three consecutive straight lines are connected. The pulley set for a shifting mechanism according to claim 1, wherein the shifting interval pattern further comprises a front end straight line section tangentially connected to the front end of the cubic curved section, and a tangently connected to the cubic type a rear end straight line segment at the rear end of the curved segment, the cubic curved segment includes two distinct and connected cubic curves, and a slope function is generated when the shift interval pattern is first differentiated, the slope function including a front end straight portion, a rear end straight portion, and a quadratic curved segment that is still tangentially connected to the front end straight portion and the rear end straight portion, respectively. A pulley set for a shifting mechanism according to claim 9, wherein after the differential function is differentiated, four consecutive straight lines are connected.