CN212387232U

CN212387232U - Novel friction drive structure

Info

Publication number: CN212387232U
Application number: CN202020477466.1U
Authority: CN
Inventors: 翁端文; 褚如昶
Original assignee: INA Intelligent Technology Zhejiang Co Ltd
Current assignee: INA Intelligent Technology Zhejiang Co Ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2021-01-22
Anticipated expiration: 2030-04-03

Abstract

The utility model belongs to the technical field of friction driving structures, in particular to a novel friction driving structure, which comprises a main body arranged on a transmission track, wherein the lower end of the main body is provided with a first friction wheel and a second friction wheel, and the first friction wheel and the second friction wheel are respectively arranged at two sides of the transmission track; one side of the friction wheel and one side of the friction wheel are both provided with elastic components, the main body comprises a synchronous structure, and then when the friction wheel is worn and abraded, the diameter of the friction wheel is reduced, the elastic components enable the friction wheel to be abutted against one side of the transmission track, and the synchronous structure drives the friction wheel to be abutted against the other side of the transmission track, so that the transmission track is located between the friction wheel and the friction wheel, and therefore the problem that the cross rod is damaged due to position deviation can be avoided.

Description

Novel friction drive structure

Technical Field

The utility model belongs to the technical field of friction drive structure, refer in particular to a novel friction drive structure.

Background

The friction driving mechanism is generally used for transporting objects, is commonly used for driving the rod-type conveying line, and comprises a driving device, a driving wheel and a driven wheel, wherein the driving wheel and the driven wheel are respectively arranged on two sides of a cross rod of the rod-type conveying line and abut against the cross rod. In the actual use process, the driving wheel is driven to rotate by the driving device, and the cross rod is driven to move by the friction force between the driving wheel and the cross rod, so that power transmission is realized. Meanwhile, an elastic member such as a spring is arranged on one side of the driven wheel, so that the driving wheel and the driven wheel are in close contact with the cross bar.

However, in general, the driving wheel is fixed, so when the driving wheel is worn and the diameter of the driving wheel is reduced, the driven wheel moves towards the driving wheel due to the action of the spring, and after long-term use, the position of the cross bar is free from deviation, so that the cross bar is damaged. For example, patent No. 2017205974377, entitled friction drive mechanism, describes a friction drive mechanism that is common in the present stage, so that it is seen that the driving wheel is stationary, and one side of the driven wheel is provided with an elastic member such as a spring, so that the driving wheel and the driven wheel are in closer contact with the cross bar, so that it is inevitable that the driving wheel is worn, and when the diameter is smaller, the driven wheel can cause the position of the cross bar to deviate due to the action of the spring, thereby causing damage to the cross bar.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel friction drive structure, receive wearing and tearing and the diameter diminishes when the friction pulley, thereby accessible elastic component makes the friction pulley one leaning on and leans on in transmission track one side to drive friction pulley two and then guarantee through the synchronization structure that the transmission track is located the centre of friction pulley one and friction pulley two, thereby ensured that the transmission track is in the position at center, and then solved the horizontal pole because offset and impaired problem.

The purpose of the utility model is realized like this:

a novel friction driving structure comprises a main body which is used for being placed on a transmission rail, wherein a first friction wheel and a second friction wheel are arranged at the lower end of the main body, and the first friction wheel and the second friction wheel are respectively placed on two sides of the transmission rail;

the main body comprises a synchronous structure, so that when the first friction wheel is worn and the diameter of the first friction wheel is reduced, the first friction wheel is abutted against one side of the transmission track through the elastic component, and the second friction wheel is driven through the synchronous structure so as to ensure that the transmission track is positioned between the first friction wheel and the second friction wheel.

On the basis of the above scheme, a further improved or preferred scheme further comprises:

preferably, the synchronizing structure includes distance piece one, distance piece two and floating plate, and the floating plate removes and sets up on the track, one end of distance piece one and two one ends of distance piece all link to each other with the floating plate, and the other end of distance piece one other end and two other ends of distance piece are connected with friction wheel one and friction wheel two respectively, thereby drive friction wheel one and friction wheel two through removing the floating plate in step.

Preferably, the first distance block and the second distance block are respectively connected with the first friction wheel and the second friction wheel through a first connecting shaft and a second connecting shaft, and the first distance block and the second distance block are respectively connected with the floating plate through a first connecting seat and a second connecting seat.

Preferably, a first moving block is arranged at the bottom of the floating plate, a first groove track is arranged at the bottom of the first moving block, a mounting plate is arranged between the transmission track and the floating plate, a first moving track is arranged on the mounting plate, the first moving block moves on the first moving track, and the first groove track covers the first moving track;

or a second moving track is arranged at the bottom of the floating plate, a third moving block is arranged on the mounting plate, a third groove track is formed in the bottom of the third moving block, the third moving block moves on the second moving track, and the third groove track covers the second moving track.

Preferably, the main body is provided with a driving source which drives the first friction wheel and the second friction wheel to rotate through the transmission assembly;

the conveying assembly comprises a driving gear, a first main gear and a first auxiliary gear, two ends of the first main gear are meshed with the driving gear and the first auxiliary gear respectively, the driving source is provided with a driving shaft, the driving gear is sleeved on the driving shaft, the first main gear is arranged on the first connecting seat, and the first auxiliary gear is connected with the first friction wheel through a first connecting shaft.

Preferably, the transmission assembly further comprises a second main gear and a second pinion, two ends of the second main gear are meshed with the first main gear and the second pinion respectively, the second main gear is arranged on the second connecting seat, and the second pinion is connected with the second friction wheel through a second connecting shaft.

Preferably, the main part lower extreme wears to be equipped with the gag lever post, and main part bottom both ends are provided with swing arm one and swing arm two respectively, swing arm one end and two one ends of swing arm are connected with respectively friction wheel one and friction wheel two, and swing arm one side end and two both sides of swing arm end are provided with limiting plate one and limiting plate two respectively, the limiting plate one other end and the two other ends of limiting plate are connected with the gag lever post both ends respectively, and pass through the spacing limiting plate one of elastic component and limiting plate two.

Preferably, the elastic assembly comprises a spring and a limiting piece, and the other end of the spring abuts against the first limiting plate and the second limiting plate through the limiting piece;

the first limiting plate and the second limiting plate are respectively provided with a first clamping groove and a second clamping groove, and the first clamping groove and the second clamping groove respectively cover two ends of the limiting rod.

Preferably, the first swing arm and the second swing arm are respectively connected with the first friction wheel and the second friction wheel through a first connecting shaft and a second connecting shaft, the first connecting shaft and the second connecting shaft are respectively arranged at one end of the first swing arm and one end of the second swing arm in a penetrating mode, and the other end of the first swing arm and the other end of the second swing arm are arranged on the mounting plate through mounting frames.

Preferably, the bottom of the main body is provided with a second moving block, the transmission track is provided with a second groove track, and the second moving block moves in the second groove track;

or the bottom of the moving block II is provided with a groove track IV, the transmission track is provided with a moving track III, the moving block II moves on the moving track III, and the groove track IV covers the moving track III.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

the utility model discloses all set up elastic component in one side of friction pulley one side and friction pulley two to thereby make friction pulley one and two synchronous motion of friction pulley through the synchronization structure. Therefore, when the first friction wheel is abraded and the diameter of the first friction wheel is reduced, the first friction wheel can abut against one side of the transmission track through the elastic assembly, the second friction wheel is driven through the synchronous structure, the transmission track is located between the first friction wheel and the second friction wheel, the transmission track is located at the center, and the problem that the cross rod is damaged due to position deviation is solved.

Drawings

FIG. 1 is one of the schematic structural diagrams of the first embodiment of the present invention;

fig. 2 is a schematic view of the first embodiment of the present invention;

fig. 3 is a schematic top view of the first embodiment of the present invention;

FIG. 4 is a second schematic diagram of the first structure of the present invention;

fig. 5 is a schematic view of the first embodiment of the present invention;

FIG. 6 is a schematic top view of a second embodiment of the present invention;

FIG. 7 is a schematic view of the second embodiment of the present invention;

fig. 8 is a second schematic diagram of the second structure according to the present invention.

In the figure: 1-a transfer track; 2-a body; 3-a friction wheel I; 4-friction wheel II;

5-spacing block I; 6-distance block two; 7-floating plate; 8-connecting the shaft I; 9-connecting the shaft II;

10-connecting seat one; 11-connecting seat II; 12-moving the block one; 13-mounting a plate;

14-moving the first track; 15-a drive source; 16-a drive gear; 17-a first main gear;

18-pinion one; 19-a first clamping groove; 20-a second main gear; 21-pinion two;

22-a limiting rod; 23-swing arm one; 24-a second swing arm; 25-a first limiting plate;

26-a second limiting plate; 27-a spring; 28-a mounting frame; 29-a second clamping groove; 30-groove track two.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

as can be seen from fig. 1, 2 and 4, a novel friction driving structure includes a main body 2 disposed on a conveying track 1, a first friction wheel 3 and a second friction wheel 4 are disposed at a lower end of the main body 2, and the first friction wheel 3 and the second friction wheel 4 are disposed on two sides of the conveying track 1 respectively. Therefore, in the actual use process, the transmission rail 1 is driven to move by the rotation of the first friction wheel 3, and the second friction wheel 4 is rotated. The first friction wheel 3 is a driving wheel, the second friction wheel 4 is a driven wheel, and when the second friction wheel 4 rotates, friction between the first friction wheel 3, the second friction wheel 4 and the transmission rail 1 mainly drives the transmission rail 1 to move.

And the bottom of the main body 2 is provided with a second moving block, the transmission track 1 is provided with a second groove track 30, and the second moving block moves in the second groove track 30. When the friction wheel I3 rotates to drive the transmission track 1 to move, the transmission track 1 can move smoothly through the matching of the moving block II and the groove track II 30, and the main body 2 is not moved. The moving structure is simple, so that the moving between the two is realized, and the stability of the structure is ensured even if the processing and the installation are facilitated.

And the structure between the main body 2 and the transmission track 1 can also be that the bottom of the moving block two is provided with a groove track four, and the transmission track 1 is provided with a moving track three, so that in the actual use process, the moving block two moves on the moving track three, and the groove track four covers on the moving track three. Namely, the second moving block is matched with the third moving track, so that the transmission track 1 can move smoothly, and the main body 2 is not moved. The moving structure is simple, so that the moving between the two is realized, and the stability of the structure is ensured even if the processing and the installation are facilitated.

Simultaneously combine fig. 5, fig. 7 and fig. 8, can know that friction wheel 3 one side and friction wheel two 4 one side all set up elastic component, therefore when the installation, and then make friction wheel 3 one side and friction wheel two 4 support and lean on transmission track 1 both sides through elastic component to can carry out the flexible regulation to the load of friction wheel 3 and friction wheel two 4 through elastic component, when the load is too big, because elastic component has flexible pretightning force, thereby can protect friction wheel 3 and friction wheel two 4, avoid overload.

And the main body 2 includes a synchronizing structure, so that when the first friction wheel 3 is worn to reduce the diameter, the first friction wheel 3 can abut against one side of the conveying track 1 through the elastic component, and the second friction wheel 4 is driven through the synchronizing structure, so that the conveying track 1 is located between the first friction wheel 3 and the second friction wheel 4.

The friction wheel 3 is worn to reduce the diameter, namely the wear is reduced in a small range, and the friction wheel 3 does not completely abut against one side of the conveying track 1 due to the reduced diameter, so that the elastic component enables the friction wheel 3 to abut against one side of the conveying track 1 through the elasticity of the elastic component. Then, the second friction wheel 4 is driven to move through the synchronous structure, at the moment, the abrasion between the second friction wheel 4 and the transmission track 1 is mainly increased, and the diameter of the second friction wheel 4 is further abraded to be consistent with that of the first friction wheel 3.

And thereby wear and tear when friction pulley 3 and make the diameter diminish, thereby the elastic component makes friction pulley 3 inwards support and lean on transmission track 1 one side this moment to drive friction pulley two 4 inwards through the synchronization structure and support, therefore both moving distance and direction are the same, so can guarantee that transmission track 1 is located the centre of friction pulley 3 and friction pulley two 4, and then avoided the horizontal pole because offset and impaired problem.

Referring to fig. 5, 7 and 8, it can be seen that the synchronizing structure includes a first distance block 5, a second distance block 6 and a floating plate 7, and the floating plate 7 is movably disposed on the track, while the first distance block 5 and the second distance block 6 are both disposed on the floating plate 7, and the first distance block 5 and the second distance block 6 are respectively connected to the first friction wheel 3 and the second friction wheel 4.

Therefore, in the actual use process, the first friction wheel 3 and the second friction wheel 4 are synchronously driven through the floating plate 7, namely, the first friction wheel 3 drives the first distance block 5 to move so as to drive the floating plate 7 to move, so that the second distance block 6 synchronously moves and drives the second friction wheel 4 to move.

And the first distance block 5 and the second distance block 6 are respectively connected with the first friction wheel 3 and the second friction wheel 4 through a first connecting shaft 8 and a second connecting shaft 9, and the first distance block 5 and the second distance block 6 are respectively connected with the floating plate 7 through a first connecting seat 10 and a second connecting seat 11.

Therefore, in actual use, one end of the distance block I5 is connected with the friction wheel I3 through the connecting shaft I8, and the other end of the distance block I is connected with the floating plate 7 through the connecting seat I10. Thus, when the friction wheel-3 is directly reduced due to wear, and when the friction wheel-3 is moved inward by the elastic member, the end of the distance piece-5 connected to the friction wheel-3 is moved inward and rearward, and the end of the distance piece-5 connected to the floating plate 7 is moved outward and forward, thereby moving the floating plate 7.

And the floating plate 7 moves to drive the end of the second distance block 6 connected with the floating plate 7 to move outwards and forwards, and the end of the second distance block 6 connected with the second friction wheel 4 moves inwards and backwards, so that the second friction wheel 4 moves inwards, and the first friction wheel 3 and the second friction wheel 4 move synchronously.

Referring to fig. 5, 7 and 8, in the structure between the floating plate 7 and the transfer track 1, first, a first moving block 12 is disposed at the bottom of the floating plate 7, a first groove track is disposed at the bottom of the first moving block 12, a mounting plate 13 is disposed between the transfer track 1 and the floating plate 7, a first moving track 14 is disposed on the mounting plate 13, and the first groove track covers the first moving track 14.

Therefore, in the actual use process, when the friction wheel one 3 is worn and moves, the floating plate 7 can move smoothly through the matching of the moving track one 14 and the groove track one of the moving block one 12, and the mounting plate 13 cannot be driven. The moving structure is simple, so that the moving between the two is realized, and the stability of the structure is ensured even if the processing and the installation are facilitated.

The structure of the floating plate 7 and the mounting plate 13 can also be: firstly, the bottom of the floating plate 7 is provided with a second moving track, the mounting plate 13 is provided with a third moving block, the bottom of the third moving block is provided with a third groove track, and the third groove track covers the second moving track.

Referring to fig. 3 and 5, it can be seen that the main body 2 is provided with a driving source 15, and the driving source 15 drives the first friction wheel 3 and the second friction wheel 4 to rotate through the transmission assembly.

Meanwhile, the transmission assembly comprises a driving gear 16, a first main gear 17 and a first auxiliary gear 18, two ends of the first main gear 17 are meshed with the driving gear 16 and the first auxiliary gear 18 respectively, the driving source 15 is provided with a driving shaft, the driving gear 16 is sleeved on the driving shaft, the first main gear 17 is arranged on the first connecting seat 10, and the first auxiliary gear 18 is connected with the first friction wheel 3 through a first connecting shaft 8.

Therefore, in practical use, the driving source 15 may preferably be a motor, and first the driving source 15 is started to operate, so as to drive the driving shaft to rotate, so that the driving gear 16 rotates, and the driving gear 16 rotates to drive the primary gear 17 to rotate, so as to rotate the secondary gear 18, so as to rotate the connecting shaft 8, and to rotate the friction wheel 3.

With reference to fig. 5, 7 and 8, it can be seen that the limiting rod 22 is penetrated by the lower end of the main body 2, the two ends of the bottom of the main body 2 are respectively provided with the first swing arm 23 and the second swing arm 24, one end of the first swing arm 23 and one end of the second swing arm 24 are respectively connected with the first friction wheel 3 and the second friction wheel 4, the side end of the first swing arm 23 and the side end of the second swing arm 24 are respectively provided with the first limiting plate 25 and the second limiting plate 26, and the other end of the first limiting plate 25 and the other end of the second limiting plate 26 are respectively connected with the two ends of the limiting rod 22, and the first.

Wherein the elastic component comprises a spring 27 and a limiting member, and the limiting rod is preferably a screw rod. The other end of the spring 27 abuts against the first limit plate 25 and the second limit plate 26 through the limit pieces. The first limit plate 25 and the second limit plate 26 are respectively provided with a first clamping groove 19 and a second clamping groove 29, and the first clamping groove 19 and the second clamping groove 29 respectively cover two ends of the limit rod 22. The limiting member may preferably be a standard member such as a nut or a snap spring, and the nut and the screw are engaged with each other to limit the falling of the spring 27 from the limiting rod 22 and to limit the position of the spring 27.

Simultaneously swing arm 23 and swing arm two 24 are connected with friction pulley 3 and friction pulley two 4 through connecting axle 8 and connecting axle two 9 respectively, and connecting axle 8 and connecting axle two 9 wear to locate 23 one ends of swing arm and two 24 one ends of swing arm respectively, the 23 other ends of swing arm and two 24 other ends of swing arm all set up on mounting panel 13 through mounting bracket 28.

Therefore, in the actual installation process, the first limiting plate 25 and the second limiting plate 26 respectively extrude the first connecting shaft 8 and the second connecting shaft 9 inwards through the spring 27, the first friction wheel 3 and the second friction wheel 4 abut against two sides of the conveying track 1, then the position of the spring 27 is limited through the limiting piece, the spring 27 is compressed, the first friction wheel 3 is abraded, the diameter is reduced, namely the first friction wheel 3 does not abut against one side of the conveying track 1, the spring 27 extrudes the first limiting plate 25 inwards through the elasticity of the spring 27, and the first friction wheel 3 abuts against two sides of the conveying track 1.

And due to the synchronous structure, the second friction wheel 4 also moves inwards, and the space after the movement is filled up through the spring 27. It can be seen that the load of the first friction wheel 3 and the second friction wheel 4 can be flexibly adjusted by the spring 27.

Example two: the present embodiment is basically the same as the first embodiment, and the difference is: the embodiment is single drive, and the embodiment is double drive, because in the single drive, when the diameter of the first friction wheel 3 is reduced, the second friction wheel 4 moves inwards to increase friction, but the wear of the second friction wheel 4 is uncertain, so that after long-time use, the wear of the first friction wheel 3 and the second friction wheel 4 is the same, and thus double drive is achieved.

The dual-drive transmission assembly further comprises a second main gear 20 and a second pinion 21, two ends of the second main gear 20 are meshed with the first main gear 17 and the second pinion 21 respectively, the second main gear 20 is arranged on the second connecting seat 11, and the second pinion 21 is connected with the second friction wheel 4 through a second connecting shaft 9.

Referring to fig. 3 and 5, in actual use, when the first main gear 17 starts to rotate, the second main gear 20 is driven to rotate, so that the second pinion 21 rotates, the second connecting shaft 9 rotates, and the second friction wheel 4 rotates.

Therefore, the first friction wheel 3 and the second friction wheel 4 are both driven, namely, the structures of the first friction wheel 3 and the second friction wheel 4 are completely consistent, so that the received force and the moving distance are consistent. And to ensure that the two sides are completely symmetrical, the diameters of the first friction wheel 3 and the second friction wheel 4 are the same, and the first pinion 18 and the second pinion 21 are equal in size, while the first main gear 17 and the second main gear 20 are equal in size.

Therefore, in the actual use process, the torques of the first friction wheel 3 and the second friction wheel 4 are the same, meanwhile, the diameters of the first friction wheel 3 and the second friction wheel 4 are the same, namely the radiuses of the first friction wheel 3 and the second friction wheel 4 are the same, the driving forces of the first friction wheel 3 and the second friction wheel 4 are the same through a torque formula, and the abrasion loss of the first friction wheel 3 and the second friction wheel 4 is the same because the friction force of the friction wheels is equal to the driving force, so that the transmission main rail 1 is further ensured to be always in the middle of the main rail. Therefore, under the general condition, the abrasion of two sides can be ensured to be consistent, and the diameter change of two friction wheels is avoided to be different.

And the first friction wheel 3 and the second friction wheel 4 are both driven, so that the first friction wheel 3 and the second friction wheel 4 can apply force, but not only the first friction wheel 3 can apply force like single driving, so that the force applied by the first friction wheel 3 in single driving is twice that applied by the first friction wheel 3 in double driving, thereby having larger load on the elastic component, and reducing the load on the elastic component after double driving is adopted.

The torque of the first friction wheel 3 and the torque of the second friction wheel 4 are the same, and meanwhile, as the diameters of the first friction wheel 3 and the second friction wheel 4 are equal, namely the radii of the first friction wheel 3 and the second friction wheel 4 are equal, and the driving force of the first friction wheel 3 and the driving force of the second friction wheel 4 are the same through a torque formula, the load of the transmission main rail 1 divided equally by the first friction wheel 3 and the second friction wheel 4 is reduced, the wear of a single friction wheel and the load of an elastic component are reduced, and the service life of the friction wheel is prolonged.

However, the single drive also has the advantage of being less costly and thus the user can choose which one to use depending on the situation.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A novel friction drive structure is characterized in that: the device comprises a main body (2) which is placed on a transmission track (1), wherein a first friction wheel (3) and a second friction wheel (4) are arranged at the lower end of the main body (2), and the first friction wheel (3) and the second friction wheel (4) are respectively placed on two sides of the transmission track (1);

the friction wheel I (3) one side and the friction wheel II (4) one side all set up elastic component, just main part (2) include synchronous structure, thereby when friction wheel I (3) wearing and tearing make the diameter diminish, thereby accessible elastic component makes friction wheel I (3) support and leans on in transmission track (1) one side to drive friction wheel II (4) and then guarantee through synchronous structure that transmission track (1) is located the centre of friction wheel I (3) and friction wheel II (4).

2. A novel friction drive arrangement as claimed in claim 1, wherein: synchronous structure includes distance piece (5), distance piece two (6) and floating plate (7), and floats movable plate (7) and remove and set up on the track, distance piece one (5) one end and distance piece two (6) one end all link to each other with floating plate (7), and the distance piece one (5) other end and distance piece two (6) other end are connected with friction pulley one (3) and friction pulley two (4) respectively, thereby float movable plate (7) through removing and drive friction pulley one (3) and friction pulley two (4) in step.

3. A novel friction drive arrangement as claimed in claim 2, wherein: the first distance block (5) and the second distance block (6) are respectively connected with the first friction wheel (3) and the second friction wheel (4) through a first connecting shaft (8) and a second connecting shaft (9), and the first distance block (5) and the second distance block (6) are respectively connected with the floating plate (7) through a first connecting seat (10) and a second connecting seat (11).

4. A novel friction drive arrangement as claimed in claim 2, wherein: a first moving block (12) is arranged at the bottom of the floating plate (7), a first grooved rail is arranged at the bottom of the first moving block (12), a mounting plate (13) is arranged between the transmission track (1) and the floating plate (7), a first moving track (14) is arranged on the mounting plate (13), the first moving block (12) moves on the first moving track (14), and the first grooved rail covers the first moving track (14);

or a second moving track is arranged at the bottom of the floating plate (7), a third moving block is arranged on the mounting plate (13), a third groove track is formed in the bottom of the third moving block, the third moving block moves on the second moving track, and the third groove track covers the second moving track.

5. A novel friction drive structure as claimed in claim 1 or 2, wherein: the main body (2) is provided with a driving source (15), and the driving source (15) drives the first friction wheel (3) and the second friction wheel (4) to rotate through the transmission assembly;

the transmission assembly comprises a driving gear (16), a first main gear (17) and a first auxiliary gear (18), the two ends of the first main gear (17) are meshed with the driving gear (16) and the first auxiliary gear (18) respectively, the driving source (15) is provided with a driving shaft, the driving gear (16) is sleeved on the driving shaft, the first main gear (17) is arranged on a first connecting seat (10), and the first auxiliary gear (18) is connected with a first friction wheel (3) through a first connecting shaft (8).

6. A novel friction drive arrangement as set forth in claim 5 wherein: the transmission assembly further comprises a second main gear (20) and a second auxiliary gear (21), two ends of the second main gear (20) are meshed with the first main gear (17) and the second auxiliary gear (21) respectively, the second main gear (20) is arranged on the second connecting seat (11), and the second auxiliary gear (21) is connected with the second friction wheel (4) through a second connecting shaft (9).

7. A novel friction drive structure as claimed in claim 1 or 2, wherein: stop lever (22) are worn to be equipped with by main part (2) lower extreme, and main part (2) bottom both ends are provided with swing arm (23) and swing arm two (24) respectively, swing arm (23) one end and swing arm two (24) one end are connected with respectively friction pulley (3) and friction pulley two (4), and swing arm (23) side and swing arm two (24) side are provided with limiting plate (25) and limiting plate two (26) respectively, limiting plate (25) the other end and the two (26) other ends of limiting plate are connected with stop lever (22) both ends respectively, and pass through the spacing limiting plate of elastic component (25) and limiting plate two (26).

8. A novel friction drive arrangement as claimed in claim 7, wherein: the elastic assembly comprises a spring (27) and a limiting piece, and the other end of the spring (27) is abutted against the first limiting plate (25) and the second limiting plate (26) through the limiting piece;

the first limiting plate (25) and the second limiting plate (26) are respectively provided with a first clamping groove (19) and a second clamping groove (29), and the first clamping groove (19) and the second clamping groove (29) respectively cover two ends of the limiting rod (22).

9. A novel friction drive arrangement as claimed in claim 7, wherein: swing arm one (23) and swing arm two (24) are connected with friction pulley one (3) and friction pulley two (4) through connecting axle one (8) and connecting axle two (9) respectively, and connecting axle one (8) and connecting axle two (9) wear to locate swing arm one (23) one end and swing arm two (24) one end respectively, the swing arm one (23) other end and swing arm two (24) other end all set up on mounting panel (13) through mounting bracket (28).

10. A novel friction drive structure as claimed in claim 1 or 2, wherein: a second moving block is arranged at the bottom of the main body (2), a second groove rail (30) is arranged on the transmission track (1), and the second moving block moves in the second groove rail (30);

or the bottom of the moving block II is provided with a groove track IV, the transmission track (1) is provided with a moving track III, the moving block II moves on the moving track III, and the groove track IV covers the moving track III.