A telescopic pin chain sliding gear type continuously variable transmission

Abstract

The invention discloses a telescopic pin chain sliding gear type continuously variable transmission, comprising a connecting frame, a driving spline shaft and a driven spline shaft; the driving spline shaft and the driven spline shaft are arranged in parallel, and the driving spline shaft and the driven spline shaft are rotatably arranged on the connecting frame; speed regulating mechanisms are also arranged at both ends of the driving spline shaft and the driven spline shaft; the driving spline shaft is sleeved with two driving bevel wheels with cone surfaces facing each other. The beneficial effects of the invention are: the telescopic pin chain sliding gear type continuously variable transmission transmits power through the interaction between the telescopic pin and the contact part on the sliding gear, and the contact part between the telescopic pin and the sliding gear can select high pair or low pair transmission, while the traditional mechanical continuously variable transmission transmits power through friction, and the transmission mode is different. Therefore, the present scheme can theoretically transmit sufficiently large power under the condition of enhanced design, overcome the problem of limited power transmission of the traditional continuously variable transmission, and expand the use of the continuously variable transmission.

Description

Technical Field

[0001] The present invention relates to the field of transmissions, and in particular to a telescopic pin chain sliding gear type continuously variable transmission. Background Art

[0002] Traditional mechanical continuously variable transmission (generally referred to as CVT) is a transmission technology that is widely used in modern small cars, accounting for about 35% of the small car ownership. The power is mainly transmitted by the master and slave bevel wheel groups, belt drive belts or swing pin drive chains. The engine uses part of the power to drive the hydraulic device to provide pressure to the movable bevel wheel and change the distance between the master and slave bevel wheel groups to achieve stepless speed regulation. However, the traditional CVT mainly relies on the cone surface of the bevel wheel group to press the belt drive belt push block or the swing pin of the swing pin chain to transmit power by friction. The transmission power is limited and high power transmission cannot be achieved. It is only suitable for small cars and cannot be used in large or heavy vehicles. It is not widely used. Summary of the invention

[0003] The object of the present invention is to provide a telescopic pin chain sliding gear type continuously variable transmission to solve the deficiencies of the prior art mentioned in the above background technology.

[0004] The present invention discloses a telescopic pin chain sliding gear type continuously variable transmission, comprising a connecting frame 1, a driving spline shaft 2 and a driven spline shaft 3;

[0005] The driving spline shaft 2 and the driven spline shaft 3 are arranged in parallel, and the driving spline shaft 2 and the driven spline shaft 3 are rotatably arranged on the connecting frame 1;

[0006] The driving spline shaft 2 and the driven spline shaft 3 are also provided with speed regulating mechanisms at both ends;

[0007] The active spline shaft 2 is sleeved with an active cone wheel 4 with two cone surfaces facing each other;

[0008] The driven spline shaft 3 is sleeved with a driven cone wheel 5 with two cone surfaces facing each other;

[0009] The driving bevel wheel 4 and the driven bevel wheel 5 are evenly distributed on the conical surface along the generatrix with chute 6, the cross section of the chute 6 is a trapezoidal structure, the chute 6 is radially arranged, and the groove edges on both sides of the chute 6 are partially cut;

[0010] Sliding teeth 7 are provided between the two active bevel wheels 4 and the two driven bevel wheels 5, and both ends of the sliding teeth 7 extend into the slide groove 6. Both ends of the sliding teeth 7 match the slide groove 6, and both ends of the sliding teeth 7 slide in the slide groove 6. The portion of the sliding teeth 7 extending into the slide groove 6 is in the same height as the conical surface of the bevel wheel;

[0011] The driving bevel wheel 4 and the driven bevel wheel 5 are sleeved with telescopic pin chains on their conical surfaces;

[0012] The telescopic pin chain is provided with a telescopic connecting portion, and the outer end of the telescopic connecting portion can contact the sliding tooth 7.

[0013] Preferably, the telescopic pin chain comprises a side chain block 8, an intermediate chain block 9 and a telescopic connection portion;

[0014] The telescopic pin chain is composed of a side chain block 8 and an intermediate chain block 9, and the side chain block 8 and the intermediate chain block 9 are hingedly connected by two sets of telescopic connecting parts;

[0015] The telescopic pin chain is composed of two groups of side chain blocks 8 and one group of middle chain blocks 9, and the telescopic pin chain is a ring structure;

[0016] The telescopic connection part includes a pipe pin 10, a telescopic column pin 11, a pipe pin positioning clamp 12 and a telescopic spring 13, and the pipe pin 10 is composed of two sections;

[0017] The pipe pin 10 is provided with a pipe pin positioning spring 12, and the pipe pin positioning spring 12 is arranged on the inner side of the side chain block 8;

[0018] A telescopic pin 11 is slidably disposed inside the tube pin 10, one end of the telescopic pin 11 extends out of the tube pin 10, the telescopic pin is provided with a telescopic pin boss, and a concave surface matching the telescopic pin boss is provided inside the tube pin 10 to limit the extension amount of the telescopic pin 11;

[0019] The two sections of the tube pin 10 are arranged opposite to each other, and a telescopic spring 13 is arranged inside the two sections of the tube pin 10 . The telescopic spring 13 is in contact with the two telescopic column pins 11 .

[0020] Preferably, contact portions 14 are provided at both ends of the sliding tooth 7. The contact portions 14 are arranged in the sliding groove 6. The contact portions 14 can contact the telescopic column pin 11. The end of the contact portion 14 is wedge-shaped. The contact portion 14 is at the same height as the conical surface of the cone wheel.

[0021] Preferably, the side chain block 8 is I-shaped, the middle chain block 9 is I-shaped, and the sum of the chain block widths on both sides of the side chain block 8 is equal to the width of one side of the middle chain block 9 .

[0022] Preferably, the speed regulating mechanism comprises a wedge-shaped speed regulating fork 15, a speed regulating fork connecting rod 16, a stopper sleeve 17, a push sleeve 18 and a push sleeve bearing 19;

[0023] Both ends of the active spline shaft and the driven spline shaft are respectively sleeved with push sleeve bearings 19, and the push sleeve bearings 19 are respectively arranged on both sides of the active bevel wheel 4 and the driven bevel wheel 5, and one side of the push sleeve bearing 19 is provided with a push sleeve 18, and one side of the push sleeve 18 is provided with a wedge-shaped speed regulating fork 15, and one side of the wedge-shaped speed regulating fork 15 is provided with a stopper sleeve 17, and the stopper sleeve 17 is arranged on the inner side of the connecting frame 1;

[0024] The wedge-shaped speed regulating forks 15 on both sides of the driving bevel wheel 4 and the driven bevel wheel 5 are arranged opposite to each other, and the wedge-shaped speed regulating forks 15 on both sides of the driving bevel wheel 4 and the driven bevel wheel 5 are connected through a speed regulating fork connecting rod 16 .

[0025] Preferably, a speed regulating screw 20 is provided on one side of the wedge-shaped speed regulating fork 15, and a stabilizing support frame 21 is provided on one side of the connecting frame 1;

[0026] A worm gear 22 is rotatably disposed between the stable support frames 21, and the speed regulating screw 20 passes through the stable support frames 21;

[0027] The speed regulating screw 20 passes through the worm gear 22, and the worm gear 22 is threadedly connected to the speed regulating screw 20;

[0028] A worm 23 is disposed at the lower side of the stable support frame 21 , and the worm 23 is fitted and connected with the worm wheel 22 . A speed regulating motor 24 is disposed at one side of the stable support frame 21 , and the speed regulating motor 24 is connected with the worm 23 .

[0029] The beneficial effects of the present invention are:

[0030] 1. The telescopic pin chain sliding gear type continuously variable transmission transmits power through the interaction between the telescopic pin and the contact part on the sliding gear. The contact part between the telescopic pin and the sliding gear can choose high pair or low pair transmission, while the traditional mechanical continuously variable transmission transmits power through friction, and the transmission method is different. Therefore, this scheme can theoretically transmit sufficient power under the condition of enhanced design, overcome the problem of limited power transmission of traditional continuously variable transmission, and expand the use of continuously variable transmission.

[0031] 2. This scheme transmits power through the interaction between the telescopic pin and the sliding gear by re-conceptualizing the speed change mechanism components and transmission parts. Although the overall appearance is similar to the traditional continuously variable transmission, there are huge differences in transmission principle, speed regulation principle, component structure and other contents.

[0032] 3. The key to the transmission of telescopic pins and sliding gears is to install telescopic pins inside the tube pins. If the pins are extended too long, motion interference will occur. Therefore, the extension of the pins cannot exceed the maximum cutting position on the slide slot side. The telescopic spring keeps the pins extended normally. The cone wheel slide slot side is partially processed to expose part of the sliding gear contact part to produce the action point. The inner side of the contact part end is set as a wedge cutting to correctly guide the pins to compress without motion interference. These are huge differences from traditional mechanical continuously variable transmissions. It is precisely because of these special structural points that this scheme has high comprehensive transmission efficiency and will not slip. It can continuously change speed and transmit power smoothly, with a driving experience similar to that of a gear transmission.

[0033] 4. The use of a speed regulating motor to drive a wedge-shaped speed regulating fork to achieve stepless speed regulation is also a huge difference from the traditional continuously variable transmission. The complex hydraulic speed regulating mechanism is abandoned because this solution does not need to provide a large pressure on the cone wheel. It only needs to change the distance between the cone wheels of the cone wheel group and maintain a moderate tension of the telescopic pin chain to meet the use requirements. Therefore, this solution does not waste engine power. The structure is simple, the cost is low, the production cost is low, and the reliability is good. The retaining sleeves are fixed on the spline shaft on both sides of the cone wheel group, so that the spline shaft is subjected to the axial force generated by the movement of the wedge-shaped speed regulating fork, which can appropriately reduce the design strength of the shell and reduce the weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0035] Figure 2 It is a schematic diagram of the top view structure of the present invention.

[0036] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention in a top view.

[0037] Figure 4 It is a schematic diagram of the structure of the telescopic pin chain of the present invention.

[0038] Figure 5 It is a schematic diagram of the pipe pin structure of the present invention.

[0039] Figure 6 It is a schematic diagram of the structure of the active bevel gear set of the present invention.

[0040] Figure 7 This is a schematic diagram of the active cone gear structure of the present invention.

[0041] Figure 8 It is a schematic diagram of the sliding gear structure of the present invention.

[0042] Fig. 9 It is a schematic diagram of the structure of the speed regulating mechanism of the present invention.

[0043] In the figure: 1, connecting frame, 2, driving spline shaft, 3, driven spline shaft, 4, driving bevel wheel, 5, driven bevel wheel, 6, slide groove, 7, sliding tooth, 8, side chain block, 9, intermediate chain block, 10, pipe pin, 11, telescopic column pin, 12, pipe pin positioning spring, 13, telescopic spring, 14, contact part, 15, wedge-shaped speed regulating fork, 16, speed regulating fork connecting rod, 17, stopper sleeve, 18, push sleeve, 19, push sleeve bearing, 20, speed regulating screw, 21, stable support frame, 22, worm wheel, 23, worm, 24, speed regulating motor. DETAILED DESCRIPTION

[0044] The following content describes in detail the specific implementation of the present invention in conjunction with the accompanying drawings.

[0045] A telescopic pin chain sliding gear type continuously variable transmission, comprising a connecting frame 1, a driving spline shaft 2 and a driven spline shaft 3;

[0046] The driving spline shaft 2 and the driven spline shaft 3 are arranged in parallel, and the driving spline shaft 2 and the driven spline shaft 3 are rotatably arranged on the connecting frame 1;

[0047] The driving spline shaft 2 and the driven spline shaft 3 are also provided with speed regulating mechanisms at both ends;

[0048] The active spline shaft 2 is sleeved with an active cone wheel 4 with two cone surfaces facing each other;

[0049] The driven spline shaft 3 is sleeved with a driven cone wheel 5 with two cone surfaces facing each other;

[0050] The driving bevel wheel 4 and the driven bevel wheel 5 are evenly distributed on the conical surface along the generatrix with chute 6, the cross section of the chute 6 is a trapezoidal structure, the chute 6 is radially arranged, and the groove edges on both sides of the chute 6 are partially cut;

[0051] Sliding teeth 7 are provided between the two active bevel wheels 4 and the two driven bevel wheels 5, and both ends of the sliding teeth 7 extend into the slide groove 6. Both ends of the sliding teeth 7 match the slide groove 6, and both ends of the sliding teeth 7 slide in the slide groove 6. The portion of the sliding teeth 7 extending into the slide groove 6 is in the same height as the conical surface of the bevel wheel;

[0052] The driving bevel wheel 4 and the driven bevel wheel 5 are sleeved with telescopic pin chains on their conical surfaces;

[0053] The telescopic pin chain is provided with a telescopic connecting part, the outer end of which can contact the sliding tooth 7, and the connecting frame can support the active spline shaft and the driven spline shaft. The active spline shaft is the power input shaft, and the driven spline shaft is the power output shaft. The speed regulating structure can change the delivery speed. The telescopic pin chain forms a transmission structure with the active and driven bevel wheels. The sliding groove is a trapezoidal structure that can fit with the two ends of the sliding tooth, which can prevent the sliding tooth from leaving the bevel wheel when it is pulled out of the telescopic pin chain. The sliding tooth and the cone surface have the same height, which can facilitate the extension and retraction of the telescopic pin. The local cutting of the groove edge can facilitate the extension of the telescopic pin to be stuck on the sliding tooth, so as to facilitate the transmission of the telescopic pin chain and the cone wheel.

[0054] Preferably, the telescopic pin chain comprises a side chain block 8, an intermediate chain block 9 and a telescopic connection portion;

[0055] The telescopic pin chain is composed of a side chain block 8 and an intermediate chain block 9, and the side chain block 8 and the intermediate chain block 9 are hingedly connected by two sets of telescopic connecting parts;

[0056] The telescopic pin chain is composed of two groups of side chain blocks 8 and one group of middle chain blocks 9, and the telescopic pin chain is a ring structure;

[0057] The telescopic connection part includes a pipe pin 10, a telescopic column pin 11, a pipe pin positioning clamp 12 and a telescopic spring 13, and the pipe pin 10 is composed of two sections;

[0058] The pipe pin 10 is provided with a pipe pin positioning spring 12, and the pipe pin positioning spring 12 is arranged on the inner side of the side chain block 8;

[0059] A telescopic column pin 11 is slidably arranged inside the tube pin 10, one end of the telescopic column pin 11 extends out of the tube pin 10, the telescopic column pin is provided with a telescopic column pin boss, and a concave surface matching with the telescopic column pin boss is provided inside the tube pin 10 to limit the extension amount of the telescopic column pin 11. The concave surface of the tube pin and the boss of the telescopic column pin can control the extension length of the telescopic column pin to prevent the telescopic column pin from extending too long;

[0060] The two sections of the tube pin 10 are arranged opposite to each other, and a telescopic spring 13 is arranged inside the two sections of the tube pin 10. The telescopic spring 13 is in contact with two telescopic column pins 11. The telescopic spring can push the telescopic column pin to facilitate the engagement of the telescopic column pin with the sliding gear. The telescopic column pin can be engaged on the sliding gear when it is telescoped. The tube pin positioning spring can fix the tube pin on the telescopic column pin chain to prevent the tube pin from moving. The tube pin is divided into two sections to facilitate the installation and replacement of the tube pin, and also to facilitate the installation of the telescopic spring.

[0061] Preferably, contact portions 14 are provided at both ends of the sliding tooth 7, and the contact portions 14 are arranged in the sliding groove 6. The contact portions 14 can contact the telescopic column pin 11, and the end of the contact portion 14 is wedge-shaped. The contact portion 14 is in the same height as the conical surface of the cone wheel, so that the contact portion can easily contact the telescopic column pin. The wedge-shaped end of the contact portion can compress the telescopic column pin when the telescopic column pin is against the contact portion, thereby preventing the telescopic column pin from being stuck in the contact portion.

[0062] Preferably, the side chain block 8 is I-shaped, the middle chain block 9 is I-shaped, the sum of the chain block widths on both sides of the side chain block 8 is equal to the width of one side of the middle chain block 9, and the width of the side chain block is the same as the thickness of one side of the middle chain block to ensure that the forces on the tube pins are the same, thereby preventing the deformation of the tube pins caused by the tension of the side chain blocks and the middle chain blocks.

[0063] Preferably, the speed regulating mechanism comprises a wedge-shaped speed regulating fork 15, a speed regulating fork connecting rod 16, a stopper sleeve 17, a push sleeve 18 and a push sleeve bearing 19;

[0064] Both ends of the active spline shaft and the driven spline shaft are respectively sleeved with push sleeve bearings 19, and the push sleeve bearings 19 are respectively arranged on both sides of the active bevel wheel 4 and the driven bevel wheel 5, and one side of the push sleeve bearing 19 is provided with a push sleeve 18, and one side of the push sleeve 18 is provided with a wedge-shaped speed regulating fork 15, and one side of the wedge-shaped speed regulating fork 15 is provided with a stopper sleeve 17, and the stopper sleeve 17 is arranged on the inner side of the connecting frame 1;

[0065] The wedge-shaped speed regulating forks 15 on both sides of the active cone wheel 4 and the driven cone wheel 5 are arranged opposite to each other, and the wedge-shaped speed regulating forks 15 on both sides of the active cone wheel 4 and the driven cone wheel 5 are connected by a speed regulating fork connecting rod 16. The wedge-shaped speed regulating fork can slide between the block sleeve and the push sleeve, and the distance between the block sleeve and the push sleeve can be changed by sliding, so as to change the distance between the cone wheels, and play a role in speed change. The push sleeve bearing can connect the push sleeve and the cone wheel to prevent the cone wheel from rotating and driving the push sleeve. The speed regulating fork connecting rod can connect the wedge-shaped speed regulating fork, so that the wedge-shaped speed regulating forks on the active cone wheel group and the driven cone wheel group can move synchronously.

[0066] Preferably, a speed regulating screw 20 is provided on one side of the wedge-shaped speed regulating fork 15, and a stabilizing support frame 21 is provided on one side of the connecting frame 1;

[0067] A worm gear 22 is rotatably disposed between the stable support frames 21, and the speed regulating screw 20 passes through the stable support frames 21;

[0068] The speed regulating screw 20 passes through the worm gear 22, and the worm gear 22 is threadedly connected to the speed regulating screw 20;

[0069] A worm 23 is provided on the lower side of the stable support frame 21, and the worm 23 is fitted and connected with the worm wheel 22. A speed regulating motor 24 is provided on one side of the stable support frame 21, and the speed regulating motor 24 is connected with the worm 23. The rotation of the speed regulating motor can drive the worm, and the rotation of the worm drives the worm wheel to rotate. The worm wheel is threadedly connected to the speed regulating screw, and the rotation of the worm wheel drives the speed regulating screw to extend and retract. The extension and retraction of the speed regulating screw can drive the wedge-shaped speed regulating fork to adjust the speed. The stable support frame can play a role in stabilizing the worm wheel.

[0070] Working principle:

[0071] The telescopic pin chain is installed in the V-shaped groove formed by the driving and driven cone wheel groups. The relative pressure between the cone wheel groups and the tension on the telescopic pin chain work together to force the telescopic pin of the telescopic pin chain to extend or be compressed according to the cone surface structure within the wrap angle formed by the contact between the chain and the cone wheel. The telescopic pin is in an extended state on the contact part side. The contact part of the sliding tooth is partially cut on the side of the cone wheel groove, and a part of the contact part profile is always exposed in the groove. The extended telescopic pin and the exposed sliding tooth contact part can interact with each other during movement, resulting in the following situations:

[0072] The telescopic pin is in an extended state on the telescopic part side of the sliding gear and just contacts with the exposed sliding groove part of the sliding gear contact part. Therefore, no matter which one of the telescopic pin and the sliding gear contact part is the active part, they will interact with each other to transmit power.

[0073] The telescopic pin extends out in the cutting area on the side of the slide groove and does not contact the sliding teeth. Since the pressure of the cone wheel on the telescopic pin chain is not large and the pin spring pushes the telescopic pin to support the cone surface of the cone wheel, the friction between the telescopic pin chain and the cone surface of the cone wheel is very small, and a slight relative sliding will occur between the two. As long as they slide, the contact part of the sliding tooth with the smallest distance from the telescopic pin will meet first and interact to transmit power.

[0074] The telescopic pin just meets the front of the sliding tooth contact part, and will be pressed into the tube pin under the guidance of the local cutting bevel on the wedge-shaped inner surface of the sliding tooth contact part. If all the telescopic pins in the angle area are in contact with the front of the sliding tooth, a slight sliding will occur, causing the telescopic pins with the smallest adjacent distance to quickly contact and interact with the sliding tooth contact part to transmit power.

[0075] The telescopic pin protrudes the longest on the side of the sliding tooth contact portion and is partially or completely compressed into the tube pin at other positions.

[0076] Once the telescopic pin is out of the compressed state, it will be quickly released to the extended state under the action of the spring until the next working state appears.

[0077] The interaction force between the telescopic pin and the sliding tooth contact part is always along the tangent direction of the cone wheel rotation, perpendicular to the telescopic direction of the telescopic pin, and does not produce compression on the telescopic pin. Multiple sliding tooth contact parts and multiple retractable pins on the telescopic pin chain are in motion. The above situation will occur simultaneously or repeatedly. The telescopic pin and the sliding tooth contact part always have a chance to act under any circumstances, power is continuously transmitted without slipping, and the overall transmission ratio is constant.

[0078] The transmission relationship between the cone wheel, the sliding tooth contact part and the telescopic pin is that the cone wheel of the active cone wheel group acts on the telescopic pin through the sliding tooth contact part, and the telescopic pin acts on the cone wheel group through the sliding tooth contact part of the driven cone wheel group, and the power transmission is achieved through the pulling action of the telescopic pin chain. The cone wheel slide groove side is partially cut to expose part of the sliding tooth contact part, while preventing the movement interference between the telescopic pin and the cone wheel. The contact position of the telescopic pin and the sliding tooth contact part is specific, and the end of the telescopic pin is close to the wedge-shaped section of the sliding tooth contact part. The wedge-shaped part of the sliding tooth contact part is cut to achieve the compression of the guide pin, while preventing the movement interference between the telescopic pin and the sliding tooth contact part.

[0079] Speed ​​regulation principle:

[0080] When the transmission is working, the speed regulating motor will drive the wedge-shaped speed regulating fork to move under the control of the sensor signal. The two sides of a pair of cone wheel groups are clamped at the same time, and move in the direction of the spline axial distance becoming smaller. The telescopic column pin chain and the sliding gear move toward the outer edge of the cone wheel under the extrusion of the cone wheel group. At the same time, the two sides of the other pair of cone wheel groups are released at the same time, and move in the direction of the spline axial distance becoming larger. The telescopic column pin chain moves toward the inner edge of the cone wheel under the action of tension, and the sliding gear moves under the constraint of the slide groove and the telescopic column pin chain. The radius of action of the sliding gear on the cone wheel is changed to achieve speed change. The continuous action of the speed regulating motor causes the radius of action of the sliding gear on the cone wheel to change continuously to achieve stepless speed change. The action of the sliding gear and the telescopic column pin is unilateral, and the sliding gear width and chain link size are different. The telescopic column pin chain and the sliding gear move in the same direction along the cone surface of the cone wheel at the same time. There is no constraint and interference in the movement, and the stepless speed change is smoothly achieved.

[0081] The beneficial effects of the present invention are:

[0082] 1. The telescopic pin chain sliding gear type continuously variable transmission transmits power through the interaction between the telescopic pin and the contact part on the sliding gear. The contact part between the telescopic pin and the sliding gear can choose high pair or low pair transmission, while the traditional mechanical continuously variable transmission transmits power through friction, and the transmission method is different. Therefore, this scheme can theoretically transmit sufficient power under the condition of enhanced design, overcome the problem of limited power transmission of traditional continuously variable transmission, and expand the use of continuously variable transmission.

[0083] 2. This scheme transmits power through the interaction between the telescopic pin and the sliding gear by re-conceptualizing the speed change mechanism components and transmission parts. Although the overall appearance is similar to the traditional continuously variable transmission, there are huge differences in transmission principle, speed regulation principle, component structure and other contents.

[0084] 3. The key to the transmission of telescopic pins and sliding gears is to install telescopic pins inside the tube pins. If the pins are extended too long, motion interference will occur. Therefore, the extension of the pins cannot exceed the maximum cutting position on the slide slot side. The telescopic spring keeps the pins extended normally. The cone wheel slide slot side is partially processed to expose part of the sliding gear contact part to produce the action point. The inner side of the contact part end is set as a wedge cutting to correctly guide the pins to compress without motion interference. These are huge differences from traditional mechanical continuously variable transmissions. It is precisely because of these special structural points that this scheme has high comprehensive transmission efficiency and will not slip. It can continuously change speed and transmit power smoothly, with a driving experience similar to that of a gear transmission.

[0085] 4. The use of a speed regulating motor to drive a wedge-shaped speed regulating fork to achieve stepless speed regulation is also a huge difference from the traditional continuously variable transmission. The complex hydraulic speed regulating mechanism is abandoned because this solution does not need to provide a large pressure on the cone wheel. It only needs to change the distance between the cone wheels of the cone wheel group and maintain a moderate tension of the telescopic pin chain to meet the use requirements. Therefore, this solution does not waste engine power. The structure is simple, the cost is low, the production cost is low, and the reliability is good. The retaining sleeves are fixed on the spline shaft on both sides of the cone wheel group, so that the spline shaft is subjected to the axial force generated by the movement of the wedge-shaped speed regulating fork, which can appropriately reduce the design strength of the shell and reduce the weight.

[0086] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions are deemed to be within the scope of protection of the present invention.

Claims

1. A telescopic pin chain sliding gear type continuously variable transmission, characterized in that: It comprises a connecting frame (1), a driving spline shaft (2) and a driven spline shaft (3); The active spline shaft (2) and the driven spline shaft (3) are arranged in parallel, and the active spline shaft (2) and the driven spline shaft (3) are rotatably arranged on the connecting frame (1); Speed ​​regulating mechanisms are also provided at both ends of the driving spline shaft (2) and the driven spline shaft (3); The active spline shaft (2) is sleeved with two active cone wheels (4) with cone surfaces facing each other; The driven spline shaft (3) is sleeved with two driven cone wheels (5) with cone surfaces facing each other; The driving bevel wheel (4) and the driven bevel wheel (5) are provided with sliding grooves (6) evenly distributed along the generatrix on the circumference of the conical surface, the sliding grooves (6) have a trapezoidal structure in cross section, the sliding grooves (6) are radially arranged, and the groove edges on both sides of the sliding grooves (6) are partially cut; A sliding tooth (7) is provided between the two active bevel wheels (4) and the two driven bevel wheels (5), and both ends of the sliding tooth (7) extend into the slide groove (6). Both ends of the sliding tooth (7) match the slide groove (6), and both ends of the sliding tooth (7) slide in the slide groove (6). The portion of the sliding tooth (7) extending into the slide groove (6) is in accordance with the height of the conical surface of the bevel wheel; The driving cone wheel (4) and the driven cone wheel (5) are sleeved with telescopic pin chains on their conical surfaces; The telescopic pin chain is provided with a telescopic connecting portion, and the outer end of the telescopic connecting portion can contact the sliding tooth (7); The telescopic pin chain comprises a side chain block (8), an intermediate chain block (9) and a telescopic connecting part; The telescopic pin chain is composed of a side chain block (8) and an intermediate chain block (9), and the side chain block (8) and the intermediate chain block (9) are hingedly connected through two sets of telescopic connecting parts; The telescopic pin chain is composed of two groups of side chain blocks (8) and one group of middle chain blocks (9), and the telescopic pin chain is a ring structure; The telescopic connection part comprises a tube pin (10), a telescopic column pin (11), a tube pin positioning clamp spring (12) and a telescopic spring (13); the tube pin (10) is composed of two sections; The pipe pin (10) is provided with a pipe pin positioning spring (12), and the pipe pin positioning spring (12) is arranged on the inner side of the side chain block (8); A telescopic column pin (11) is slidably arranged inside the tube pin (10), one end of the telescopic column pin (11) extends out of the tube pin (10), the telescopic column pin is provided with a telescopic column pin boss, and a concave surface matching the telescopic column pin boss is provided inside the tube pin (10) to limit the extension amount of the telescopic column pin (11); The two sections of the tube pin (10) are arranged opposite to each other, and a telescopic spring (13) is arranged inside the two sections of the tube pin (10), and the telescopic spring (13) is in contact with the two telescopic column pins (11); The speed regulating mechanism comprises a wedge-shaped speed regulating fork (15), a speed regulating fork connecting rod (16), a stopper sleeve (17), a push sleeve (18) and a push sleeve bearing (19); Both ends of the active spline shaft and the driven spline shaft are respectively sleeved with push sleeve bearings (19), the push sleeve bearings (19) are respectively arranged on both sides of the active bevel wheel (4) and the driven bevel wheel (5), one side of the push sleeve bearing (19) is provided with a push sleeve (18), one side of the push sleeve (18) is provided with a wedge-shaped speed regulating fork (15), one side of the wedge-shaped speed regulating fork (15) is provided with a stopper sleeve (17), and the stopper sleeve (17) is arranged on the inner side of the connecting frame (1); The wedge-shaped speed regulating forks (15) on both sides of the active cone wheel (4) and the driven cone wheel (5) are arranged opposite to each other, and the wedge-shaped speed regulating forks (15) on both sides of the active cone wheel (4) and the driven cone wheel (5) are connected via a speed regulating fork connecting rod (16).

2. The telescopic pin chain sliding gear type continuously variable transmission according to claim 1, characterized in that: Contact portions (14) are provided at both ends of the sliding tooth (7). The contact portions (14) are arranged in the sliding groove (6). The contact portions (14) can contact the telescopic column pin (11). The end of the contact portion (14) is wedge-shaped. The contact portion (14) is at the same height as the conical surface of the cone wheel.

3. The telescopic pin chain sliding gear type continuously variable transmission according to claim 1, characterized in that: The side chain block (8) is in an I-shape, the middle chain block (9) is in an I-shape, and the sum of the widths of the chain blocks on both sides of the side chain block (8) is equal to the width of one side of the middle chain block (9).

4. The telescopic pin chain sliding gear type continuously variable transmission according to claim 1, characterized in that: A speed regulating screw (20) is provided on one side of the wedge-shaped speed regulating fork (15), and a stabilizing support frame (21) is provided on one side of the connecting frame (1); A worm gear (22) is rotatably arranged between the stable support frames (21), and the speed regulating screw (20) passes through the stable support frames (21); The speed regulating screw (20) passes through the worm gear (22), and the worm gear (22) is threadedly connected to the speed regulating screw (20); A worm (23) is provided on the lower side of the stable support frame (21), and the worm (23) is fitted and connected to the worm wheel (22). A speed regulating motor (24) is provided on one side of the stable support frame (21), and the speed regulating motor (24) is connected to the worm (23).

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