CN106499783B - A Transmission Based on Variable Diameter Pulley - Google Patents

Abstract

The invention belongs to the technical field of transmissions, and particularly relates to a transmission based on variable-diameter belt pulleys. The belt is also provided with a belt pre-tightening mechanism in transmission, because the length of the effective belt required in transmission is changed after the diameter of the diameter-variable wheel is changed, the change is overcome through the belt pre-tightening mechanism, and the belt is always in a tightening state in speed change. If the variable-diameter wheel and the fixed-diameter wheel are used together as the automobile transmission, the automobile can automatically obtain larger torque and acceleration when ascending or accelerating and overtaking. Has high use effect.

Description

A Transmission Based on Variable Diameter Pulley

Technical field

The invention belongs to the technical field of transmissions, in particular to a transmission based on variable-diameter pulleys.

Background technique

At present, transmissions are used in many power industries. As a high-tech automation technology in transmissions, automatic transmissions are gradually becoming popular. Automobiles are the most widely used machinery and equipment, and their automatic transmission technology has been very advanced with the development of the electronics industry. Compared with the transmission manual transmission, the transmission has more speed identification and variable speed control. Electronic technology is often used for speed identification and control, so that the automatic transmission has many electronic parts. Electronic equipment is used as a detection part of the automatic changer. The reliability is definitely not as reliable as the mechanical identification shift. The present invention realizes the purpose of changing the transmission ratio through the induction of the mechanical structure by using the belt pulley, without the need for manual gear shifting. Among them, the variable diameter pulley has important research significance.

The present invention designs a transmission based on variable-diameter pulleys to solve the above problems.

Contents of the invention

In order to solve the above-mentioned defects in the prior art, the present invention discloses a transmission based on variable-diameter pulleys, which is realized by adopting the following technical solutions.

A speed changer based on variable diameter pulleys, characterized in that it includes a fixed pulley, a belt, and a variable diameter pulley, wherein the variable diameter pulley is a pulley installed on an input shaft, and the fixed pulley is a pulley installed on an output shaft, The variable diameter wheel is connected with the fixed wheel by a belt.

The above-mentioned fixed wheel includes an output shaft, a first fixed end, a driving round rod, and a second fixed end, wherein the first fixed end is installed on the output shaft, and 10-14 driving round rods are installed on the first fixed end equidistantly in the circumferential direction On the edge of the end face, the second fixed end is installed on the other side of the driving round rod, and the first fixed end and the second fixed end are symmetrical with respect to the symmetrical plane of the driving round rod.

The above-mentioned belt includes a belt unit, wherein the belt is composed of several belt units, and the belt units are connected by hinges; the belt unit includes a unit case, a first hinge, a clip, a second hinge, an adjustment spring, a limit bar, a clip cavity, Limiting cavity, clip limiting bottom plate, and concave surface of the clip, in which there is a clip cavity in the middle of the unit shell and a limiting cavity on both sides, a limiting strip is installed in the middle of the unit shell, and the limiting strip is located at the upper end of the clip cavity; One hinge is a single lug, and the three first hinges are equidistantly installed on one side of the unit case; the second hinge is a double lug, and the three second hinges are equidistantly installed on the other side of the unit case; Both ends of the card bar limit bottom plate protrude from the card bar, and the two sides of the upper end of the card bar have inner concave surfaces of the card bar; two card bar limit bottom plates are installed in the card bar cavity, and the card bar limit bottom plate The parts protruding from both ends of the clips are matched with the limit cavity, and the two clips on the two clip limit bottom plates installed in the clip cavity are located on both sides of the limit bar; between the two clip limit bottom plates Five adjustment springs are installed equidistantly; two adjacent belt units are hinged together through the cooperation of the first hinge of the front belt unit and the second hinge of the rear belt unit.

The above-mentioned variable-diameter wheel includes an input shaft, a drive ring support, a drive ring, a drive circular plate, a cylinder shaft, a round rod slide rail plate, a first spiral rail, a first rail support plate, a cylinder wall, a runner, a guide block, an inner Shaft, first slider, second slider, positioning plate, runner shaft, scroll spring, tube wall end plate, second slideway, guideway, first slideway, second rail support plate, second spiral rail, wherein one side of the round bar slide rail plate is evenly opened with 13 second slideways along the radial direction in the circumferential direction, and the other side of the round bar slide rail plate corresponding to the second slideway is opened with a first slideway, The first slideway and the second slideway are connected through guides; two round rod slide rail plates are installed on both sides of the cylinder shaft, one of which is mounted on the top end of one end of the cylinder shaft, and the other round rod slide rail plate is installed The installation position of the rail plate has a certain distance from the other top of the cylinder shaft; the installation structure at both ends of the driving round rod is exactly the same, and for any one end, the second slider, the guide block, and the first slider are connected in sequence, and through the first slider Installed on one end of the driving round rod, the rotating shaft of the runner is installed on the second slider through the positioning plate, and the running wheel is installed on the rotating shaft of the running wheel; 13 driving round rods are installed between two round rod slide rail plates, and for each A driving round rod, which is installed through the cooperation of the first slide block, guide block, and second slide block at each end with the first slideway, guideway, and second slideway on the slide rail plate of the corresponding end of the round rod. Between the round rod slide rail plates on both sides; on the side of the round rod slide rail plate with a certain distance from one end of the cylinder shaft: the first rail support plate is installed on the cylinder shaft, and the first spiral rail is installed on the first rail support On the plate, the runner matches the spiral track of the first spiral rail, the inner end of the scroll spring is installed on the outer edge surface of the cylinder shaft, the outer end is installed on the first rail support plate, and the end plate of the cylinder wall is installed on the second through the cylinder wall. On the outer edge of the first rail support plate, one end of the inner shaft is installed in the middle of the end plate of the cylinder wall, and the inner shaft is nested in the cylinder shaft; it is installed on the side of the round rod slide rail plate at the top of the cylinder shaft: the second rail support plate is installed inside At one end of the shaft, the second spiral rail is installed on the second rail support plate, and the runner is matched with the spiral track of the second spiral rail. The ring support is installed on the driving ring; the lengths of the positioning plates installed between the 13 driving round rods are different, and the difference in length needs to ensure that the 13 driving round rods are in the same circle.

The space before the adjacent clamping strips in the above-mentioned belt is matched with the driving round bar.

As a further improvement of the technology, the outer end of the scroll spring is installed on the first rail support plate through the spring fixing block.

As a further improvement of the present technology, the above-mentioned first rail support plate is installed on the cylinder shaft through a shaft sleeve.

As a further improvement of the present technology, the number of the above-mentioned driving round rods can also be 10-12, 14-20.

As a further improvement of the present technology, the above-mentioned second slider, guide block, and first slider are sequentially connected by welding.

Compared with the traditional transmission technology, the variable diameter wheel in the present invention drives the fixed wheel to rotate through the belt, the diameter of the fixed wheel remains unchanged during the transmission process, and the diameter of the variable diameter wheel changes according to the torque transmitted by the input shaft. There has been a change, the transmission ratio of the two pulleys has changed, and the purpose of speed change has been achieved. The belt is also equipped with a belt pre-tensioning mechanism in the transmission, because after the diameter of the variable-diameter wheel changes, the effective belt length required in the transmission changes, and the belt pre-tensioning mechanism is used to overcome this change to ensure that the belt is always in the variable speed. Tensioned state. The belt unit in the belt has two clamping strips, and the clamping strips are connected by adjusting the spring. Adjusting the spring tension can ensure that the two clamping strips clamp the driving round rod. When the driving round rod is snapped into the adjacent two belt units When between the clamping strips, the two clamping strips are pressed by the respective clamping strips of the same belt unit through the adjustment spring, and the driving round rod can still be clamped. The variable diameter wheel is installed on the input shaft, and the input shaft, the drive ring support, the drive ring, the drive circular plate, the round rod slide rail plate on one side, the cylinder shaft, and the round rod slide rail plate on the other side form a rotating whole, which can Rotate together driven by the input shaft. On the other hand, the cylinder shaft generates enough torque to drive the first rail support plate through a certain rotation through the scroll spring, and the first rail support plate can rotate stably on the cylinder shaft through the action of the bushing, and the first rail support plate drives The first helical rail rotates, and the phase difference between the rotation of the helical rail and the rotation of the round rod slide rail plate is caused by the action of the scroll spring, which causes the position of the runner in the first helical rail to change. The greater the phase difference, the greater the phase difference between the runner The greater the change in position in the track, the radial distance of the first slider from the cylinder axis is affected. The first rail support plate drives the second rail support plate at the other end to rotate through the cylinder wall, the cylinder wall end plate, and the inner shaft at the same time, and then drives the second spiral rail to rotate, causing the corresponding runner to change in position; the design of the inner shaft Due to the effect of the rotation speed angle of the first helical rail and the second helical rail on both sides of the synchronous driving round rod, the two sides of the driving round rod are subjected to the same force at the same time, so that the radial distance between it and the cylinder axis changes to achieve a stable The purpose of changing the diameter. The lengths of the positioning plates used to drive the round rods are different, because for the position of the runners in the spiral rail, the radial distances of all the runners from the center of the spiral rail are different. In order to ensure that the driving round rods are concentric, it is necessary to Position the plate to eliminate the effect of the spiral rail track.

Description of drawings

Figure 1 is a schematic diagram of the structure of a variable-diameter pulley.

Fig. 2 is a sectional view of the variable diameter pulley structure.

Figure 3 is a schematic diagram of the drive ring installation.

Figure 4 is a schematic diagram of the installation of the drive round rod.

Fig. 5 is a schematic diagram of the structure of the round rod slide rail plate.

Figure 6 is a schematic diagram of the length of the positioning plate.

Fig. 7 is a schematic diagram of the structure at both ends of the driving round rod.

Figure 8 is a schematic diagram of the installation of the swivel.

Fig. 9 is a schematic diagram of installation of the first rail support plate and the second rail support plate.

Figure 10 is a schematic diagram of cylinder wall installation.

Fig. 11 is a schematic structural diagram of the transmission.

Fig. 12 is a structural schematic diagram of the fixed wheel.

Figure 13 is a schematic diagram of the belt structure.

Fig. 14 is a structural schematic diagram of the belt unit.

Fig. 15 is a schematic diagram of the unit shell structure.

Fig. 16 is a side view of the unit case.

Fig. 17 is a schematic diagram of the structure of the limiting cavity.

Fig. 18 is a schematic diagram of the card strip structure.

Label names in the figure: 1, fixed wheel, 2, belt, 3, variable diameter wheel, 4, output shaft, 5, first fixed end, 6, driving round rod, 7, second fixed end, 8, input shaft , 9, drive ring support, 10, drive ring, 11, drive circular plate, 12, cylinder shaft, 13, round rod slide rail plate, 15, first spiral rail, 16, first rail support plate, 17, cylinder wall , 19, runner, 21, guide block, 22, inner shaft, 23, first slider, 24, second slider, 25, positioning plate, 26, runner shaft, 27, spring fixed block, 28, vortex Roll spring, 29, tube wall end plate, 30, axle sleeve, 31, second slideway, 32, guideway, 33, first slideway, 34, second rail support plate, 35, second spiral rail, 37 , belt unit, 38, unit shell, 39, the first hinge, 40, clip, 41, the second hinge, 42, adjustment spring, 43, limit bar, 44, clip cavity, 45, limit cavity, 46 , the clip limit base plate, 47, the inner concave surface of the clip.

Detailed ways

As shown in Figure 11, it includes a fixed pulley, a belt, and a variable-diameter pulley, wherein the variable-diameter pulley is the pulley installed on the input shaft, the fixed pulley is the pulley installed on the output shaft, and the variable-diameter pulley is connected to the pulley through the belt. Fixed wheel connection.

As shown in Figure 12, the above-mentioned fixed wheel includes an output shaft, a first fixed end, a driving round rod, and a second fixed end, wherein the first fixed end is installed on the output shaft, and 10-14 driving round rods are equidistant in the circumferential direction. It is installed on the edge of the end face of the first fixed end, and the second fixed end is installed on the other side of the driving round rod, and the first fixed end and the second fixed end are symmetrical with respect to the symmetry plane of the driving round rod.

As shown in Figures 13 and 14, the above-mentioned belt includes a belt unit, wherein as shown in Figure 13, the belt is composed of several belt units, and the belt units are connected by hinges; as shown in Figures 14 and 15, the belt unit includes a unit shell, The first hinge, the clip, the second hinge, the adjustment spring, the limit bar, the clip cavity, the limit cavity, the clip limit bottom plate, the concave surface of the clip, wherein as shown in Figures 15, 16, and 17, the unit case There is a bar cavity in the middle and a limit cavity on both sides. A limit bar is installed in the middle of the unit case. As shown in Figure 14, the limit bar is located at the upper end of the bar cavity; the first hinge is a single lug, and the three first hinges Equidistantly installed on one side of the unit case; the second hinge is a double lug, and the three second hinges are equidistantly installed on the other side of the unit case; as shown in Figure 18, the clip is installed on the clip limit bottom plate and Both ends of the clip limit bottom plate protrude from both ends of the clip, and both sides of the upper end of the clip have a concave surface of the clip; two clip limit bottom plates are installed in the clip chamber, and the two ends of the clip limit bottom plate protrude from the clip The part is matched with the limit chamber, as shown in Figure 14, the two clips on the two clip limit bottom plates installed in the clip cavity are located on both sides of the limit bar; between the two clip limit bottom plates Five adjustment springs are installed equidistantly; two adjacent belt units are hinged together through the cooperation of the first hinge of the front belt unit and the second hinge of the rear belt unit.

As shown in Figures 1 and 2, the above-mentioned variable diameter wheel includes an input shaft, a drive ring support, a drive ring, a drive disc, a cylinder shaft, a round rod slide rail plate, a first spiral rail, a first rail support plate, and a cylinder wall. , runner, guide block, inner shaft, first slider, second slider, positioning plate, runner shaft, scroll spring, cylinder wall end plate, second slideway, guideway, first slideway, second slideway Two-track support plate and second spiral rail, as shown in Figure 4, 5, and 6, there are 13 second slideways along the radial direction uniformly opened on one side of the round bar slideway plate, corresponding to the second slideway There is a first slideway on the other side of the round bar slideway plate of the road, and the first slideway and the second slideway are connected through guides; two round bar slideway plates are installed on both sides of the cylinder shaft, among which As shown in Figure 2, one round rod slide rail plate is installed on the top end of one end of the cylinder shaft, and the other round rod slide rail plate is installed at a certain distance from the other top end of the cylinder shaft; as shown in Figure 7, the two ends of the driving round rod are installed The structure is exactly the same, for any one of them, the second slider, the guide block, and the first slider are connected in sequence, and the first slider is installed on one end of the driving round rod, and the rotating shaft of the runner is installed on the second slider through the positioning plate , the runner is installed on the runner shaft; as shown in Figure 4, 13 driving round rods are installed between two round rod slide rail plates, and for each driving round rod, as shown in Figure 2 and 4 , which is installed on both sides of the circle through the cooperation of the first slide block, guide block, and second slide block at each end and the first slideway, guideway, and second slideway on the corresponding end of the round rod slide rail plate. Between the rod slide rail plates; one side of the round rod slide rail plate with a certain distance from the end of the cylinder shaft: as shown in Figure 2 and 9, the first rail support plate is installed on the cylinder shaft, and the first spiral rail is installed on the On the one-track support plate, as shown in Figures 6 and 8, the runner is matched with the spiral track of the first spiral rail, as shown in Figure 9, the inner end of the scroll spring is installed on the outer edge of the cylinder shaft, and the outer end is installed on the On the first rail support plate, as shown in Figure 2 and 10, the cylinder wall end plate is installed on the outer edge of the first rail support plate through the cylinder wall, and the middle of the cylinder wall end plate is installed at one end of the inner shaft, and the inner shaft is nested in the cylinder Inside the shaft; installed on one side of the round rod slide rail plate at the top of the cylinder shaft: as shown in Figure 9, the second rail support plate is installed at one end of the inner shaft, the second spiral rail is installed on the second rail support plate, and the runner and The spiral track of the second spiral track cooperates, as shown in Figure 2 and 3, the drive ring is installed on the outer edge surface of the round rod slide rail plate through the drive circular plate, and the input shaft is supported and installed on the drive ring through the drive ring; 13 drive The lengths of the positioning plates installed between the round rods are different, and the difference in length needs to ensure that the 13 driving round rods are in the same circle.

The space before the adjacent clamping strips in the above-mentioned belt is matched with the driving round bar.

As shown in FIG. 9 , the outer end of the above-mentioned scroll spring is installed on the first rail support plate through the spring fixing block.

As shown in Figure 2, the above-mentioned first rail support plate is installed on the cylinder shaft through a bushing.

The root number of the above-mentioned driving round rods can also be 10-12, 14-20.

The above-mentioned second slider, the guide block and the first slider are sequentially connected by welding.

In summary, in the present invention, the variable-diameter wheel drives the fixed wheel to rotate through the belt, and the diameter of the fixed wheel remains unchanged during the transmission process. The diameter of the variable-diameter wheel changes according to the torque transmitted by the input shaft, and the diameter changes. Change, the transmission ratio of the two pulleys has changed, and the purpose of speed change has been achieved. The belt is also equipped with a belt pre-tensioning mechanism in the transmission, because after the diameter of the variable-diameter wheel changes, the effective belt length required in the transmission changes, and the belt pre-tensioning mechanism is used to overcome this change to ensure that the belt is always in the variable speed. Tensioned state.

The belt unit in the belt has two clamping strips, and the clamping strips are connected by adjusting the spring. Adjusting the spring tension can ensure that the two clamping strips clamp the driving round rod. When the driving round rod is snapped into the adjacent two belt units When between the clamping strips, the two clamping strips are pressed by the respective clamping strips of the same belt unit through the adjustment spring, and the driving round rod can still be clamped.

The variable diameter wheel is installed on the input shaft, and the input shaft, the drive ring support, the drive ring, the drive circular plate, the round rod slide rail plate on one side, the cylinder shaft, and the round rod slide rail plate on the other side form a rotating whole, which can Rotate together driven by the input shaft. On the other hand, the cylinder shaft generates enough torque to drive the first rail support plate through a certain rotation through the scroll spring, and the first rail support plate can rotate stably on the cylinder shaft through the action of the bushing, and the first rail support plate drives The first helical rail rotates, and the phase difference between the rotation of the helical rail and the rotation of the round rod slide rail plate is caused by the action of the scroll spring, which causes the position of the runner in the first helical rail to change. The greater the phase difference, the greater the phase difference between the runner The greater the change in position in the track, the radial distance of the first slider from the cylinder axis is affected. The first rail support plate drives the second rail support plate at the other end to rotate through the cylinder wall, the cylinder wall end plate, and the inner shaft at the same time, and then drives the second spiral rail to rotate, causing the corresponding runner to change in position; the design of the inner shaft Due to the effect of the rotation speed angle of the first helical rail and the second helical rail on both sides of the synchronous driving round rod, the two sides of the driving round rod are subjected to the same force at the same time, so that the radial distance between it and the cylinder axis changes to achieve a stable The purpose of changing the diameter. The lengths of the positioning plates used to drive the round rods are different, because for the position of the runners in the spiral rail, the radial distances of all the runners from the center of the spiral rail are different. In order to ensure that the driving round rods are concentric, it is necessary to Position the plate to eliminate the effect of the spiral rail track.

The specific implementation method is as follows: when the input shaft does not rotate, the wheel formed by the driving round rod is at the maximum diameter; the input shaft starts to rotate, and when the input shaft rotates at a lower acceleration or the input shaft is subjected to a smaller torque, the vortex spring occurs A small deformation can drive the first rail support plate and the second rail support plate through the cylinder shaft. The phase difference between the first rail support plate, the second rail support plate and the round bar slide rail plate is small, and the runner is on the spiral rail. The position of the center changes very little, the radial distance changes very little, and the diameter of the variable-diameter wheel changes very little; when the torque of the input shaft is large, the scroll spring needs a large deformation to ensure the support plate of the first rail Keeping up with the rotation speed of the round rod slide rail plate, the phase difference will be very large at this time, the radial distance of the swivel ring will move greatly, the radial distance between the driving round rod and the cylinder shaft will decrease greatly, and the diameter of the variable diameter wheel will become smaller That is to say, when the driving torque or acceleration of the input shaft is large, the diameter of the variable-diameter pulley decreases. As a driving pulley, the speed of the input shaft and the output shaft is relatively small, which makes the output shaft easier to drive, and the output shaft obtains The greater the torque; if the variable diameter wheel is used together with the fixed diameter wheel as a car transmission, the car will automatically obtain greater torque and acceleration when going uphill or accelerating to overtake. Has a high use effect.

Claims (4)

1. A speed changer based on a variable-diameter pulley, characterized in that: it comprises a fixed pulley, a belt, and a variable-diameter pulley, wherein the variable-diameter pulley is the pulley installed on the input shaft, and the fixed pulley is the installed pulley on the output shaft. The pulley, the variable diameter pulley is connected with the fixed pulley through the belt; The above-mentioned fixed wheel includes an output shaft, a first fixed end, a driving round rod, and a second fixed end, wherein the first fixed end is installed on the output shaft, and 10-14 driving round rods are installed on the first fixed end equidistantly in the circumferential direction On the edge of the end face, the second fixed end is installed on the other side of the driving round rod, and the first fixed end and the second fixed end are symmetrical with respect to the symmetrical plane of the driving round rod; The above-mentioned belt includes a belt unit, wherein the belt is composed of several belt units, and the belt units are connected by hinges; the belt unit includes a unit case, a first hinge, a clip, a second hinge, an adjustment spring, a limit bar, a clip cavity, Limiting cavity, clip limiting bottom plate, and concave surface of the clip, in which there is a clip cavity in the middle of the unit shell and a limiting cavity on both sides, a limiting strip is installed in the middle of the unit shell, and the limiting strip is located at the upper end of the clip cavity; One hinge is a single lug, and the three first hinges are equidistantly installed on one side of the unit case; the second hinge is a double lug, and the three second hinges are equidistantly installed on the other side of the unit case; Both ends of the card bar limit bottom plate protrude from the card bar, and the two sides of the upper end of the card bar have inner concave surfaces of the card bar; two card bar limit bottom plates are installed in the card bar cavity, and the card bar limit bottom plate The parts protruding from both ends of the clips are matched with the limit cavity, and the two clips on the two clip limit bottom plates installed in the clip cavity are located on both sides of the limit bar; between the two clip limit bottom plates Five adjustment springs are equidistantly installed; two adjacent belt units are hinged together through the cooperation of the first hinge of the front belt unit and the second hinge of the rear belt unit; The above-mentioned variable-diameter wheel includes an input shaft, a drive ring support, a drive ring, a drive circular plate, a cylinder shaft, a round rod slide rail plate, a first spiral rail, a first rail support plate, a cylinder wall, a runner, a guide block, an inner Shaft, first slider, second slider, positioning plate, runner shaft, scroll spring, tube wall end plate, second slideway, guideway, first slideway, second rail support plate, second spiral rail, wherein one side of the round bar slide rail plate is evenly opened with 13 second slideways along the radial direction in the circumferential direction, and the other side of the round bar slide rail plate corresponding to the second slideway is opened with a first slideway, The first slideway and the second slideway are connected through guides; two round rod slide rail plates are installed on both sides of the cylinder shaft, one of which is mounted on the top end of one end of the cylinder shaft, and the other round rod slide rail plate is installed The installation position of the rail plate has a certain distance from the other top of the cylinder shaft; the installation structure at both ends of the driving round rod is exactly the same, and for any one end, the second slider, the guide block, and the first slider are connected in sequence, and through the first slider Installed on one end of the driving round rod, the rotating shaft of the runner is installed on the second slider through the positioning plate, and the running wheel is installed on the rotating shaft of the running wheel; 13 driving round rods are installed between two round rod slide rail plates, and for each A driving round rod, which is installed through the cooperation of the first slide block, guide block, and second slide block at each end with the first slideway, guideway, and second slideway on the slide rail plate of the corresponding end of the round rod. Between the round rod slide rail plates on both sides; on the side of the round rod slide rail plate with a certain distance from one end of the cylinder shaft: the first rail support plate is installed on the cylinder shaft, and the first spiral rail is installed on the first rail support On the plate, the runner matches the spiral track of the first spiral rail, the inner end of the scroll spring is installed on the outer edge surface of the cylinder shaft, the outer end is installed on the first rail support plate, and the end plate of the cylinder wall is installed on the second through the cylinder wall. On the outer edge of the first rail support plate, one end of the inner shaft is installed in the middle of the end plate of the cylinder wall, and the inner shaft is nested in the cylinder shaft; it is installed on the side of the round rod slide rail plate at the top of the cylinder shaft: the second rail support plate is installed inside At one end of the shaft, the second spiral rail is installed on the second rail support plate, and the runner is matched with the spiral track of the second spiral rail. The ring support is installed on the driving ring; the lengths of the positioning plates installed between the 13 driving round rods are different, and the difference in length must ensure that the 13 driving round rods are in the same circle; The space before the adjacent clamping strips in the above-mentioned belt is matched with the driving round bar. 2. A transmission based on a variable-diameter pulley according to claim 1, wherein the outer end of the scroll spring is mounted on the first rail support plate through a spring fixing block. 3. A transmission based on variable-diameter pulleys according to claim 1, wherein the first rail support plate is mounted on the cylinder shaft through a bushing. 4. A transmission based on variable-diameter pulleys according to claim 1, characterized in that: the second slider, the guide block, and the first slider are sequentially connected by welding.