CN210251194U - Pure mechanical low-friction obstacle-crossing double-splayed carbon-free trolley - Google Patents

Abstract

The utility model relates to a carbon-free dolly technical field discloses a two splayed carbon-free dollies of obstacle more of pure mechanical low friction. The carbon-free trolley comprises a running mechanism, a power mechanism and a steering mechanism. The steering mechanism comprises a transmission shaft, a cylindrical cam, a steering original piece, a steering sliding block and a connecting rod shaft. The outer peripheral side of the cylindrical cam is provided with a wavy track groove. The motion track of the cam thimble on the track groove is half double-splayed. The utility model discloses cylindrical cam structure among the steering mechanism, cylindrical cam friction loss when the transmission is little, transmission efficiency is high, action reaction is sensitive, the low-speed time does not have the phenomenon of crawling to can effectually reduce the whole car volume of dolly among the global design scheme, make the automobile body compacter, and use among the carbon-free dolly, realized two eight characters type orbits of pure mechanical trolley and march.

Description

Pure mechanical low-friction obstacle-crossing double-splayed carbon-free trolley

Technical Field

The utility model relates to a carbon-free dolly technical field especially relates to a two splayed carbon-free dollies of obstacle are crossed to pure mechanical low friction.

Background

With the development of science and technology, the energy consumption is increasing day by day, and coal as nature gives a precious wealth to human beings, and plays a very important role in the development of the human society for a long time. However, due to the huge demand of people for coal, the coal resources are gradually reduced and nearly exhausted. With the improvement of energy conservation and environmental protection consciousness of people, the carbon-free idea is also promoted to the research subject by people. The idea of cleaner, more environmental protection, more energy saving and more efficient is also deep.

Under the background, carbon-free trolleys are gradually becoming mechanical innovation design-type competition in various regions and even nations. And the energy required by the trolley to complete all actions in the walking process is only converted from given gravitational potential energy, and no energy from any other source is used. The energy for driving the walking and steering of the bicycle is obtained by converting given gravitational potential energy according to the energy conversion principle.

The given gravitational potential energy is made of carbon steel with the mass of 1Kg and the standard weight diameter of 50mm and the height of 65mm, and the height of the weight which can be descended is 400 +/-2 mm. The standard weight is always carried by the trolley and is not allowed to fall off the trolley. The barrier that the dolly set up on can automatic detouring the runway when moving ahead, on half standard table tennis table (length 1525mm, wide 1370mm), there are 3 obstacle piles to place along the central line, the obstacle pile is diameter 20mm, 3 round rods of length 200mm, the distance of the stake to the central pile at both ends is 350 +/-50 mm, the dolly is with 3 obstacle piles on "two 8" word tracks are walked around the central line in turn, guarantee that every obstacle pile is in a closed circle of "8" font.

Most of the existing racing cars adopt a rocker mechanism as a steering mechanism for driving, and the rocker mechanism has the problems of low steering precision, large energy loss and poor turning period adjustability of the car, so that double-splayed track advancing of a purely mechanical car cannot be realized.

SUMMERY OF THE UTILITY MODEL

To current technical problem, the utility model provides a two splayed carbon-free dollies of obstacle more of pure machinery low friction, steering mechanism middle column cam structure to among the application to the carbon-free dolly, realized that two splayed orbit of pure machinery dolly is marchd.

The utility model discloses a following technical scheme realizes:

a pure mechanical low-friction obstacle-crossing double splayed carbon-free trolley comprises:

the running mechanism comprises a bottom plate and two supports, and the two supports are symmetrically arranged on two sides of the top of the bottom plate;

the power mechanisms are arranged on the two brackets and can provide kinetic energy for the operation of the operation mechanism; and

a steering mechanism, the steering mechanism comprising:

the transmission shaft transversely penetrates through the two brackets and is rotatably connected with the brackets through bearings;

the cylindrical cam is fixedly inserted on the transmission shaft between the two brackets and can synchronously rotate with the transmission shaft; the outer peripheral side of the cylindrical cam is provided with a wavy track groove;

the second gear is fixed on the transmission shaft and is arranged on the outer side of the bracket;

the steering original support is arranged on the bottom plate;

the steering original is supported at the top of the original support, and the steering original is rotatably connected with the original support through a bearing; one end of the steering element, which is close to the track groove, is vertically inserted and fixed with a cam thimble matched with the track groove;

the adjusting block is fixedly arranged on one side, away from the top of the cam thimble, of the steering original piece;

the bottom end of the steering sliding block is vertically and alternately fixed on the adjusting block;

the end part of the connecting rod shaft close to the steering sliding block is in sliding insertion connection with the top end of the steering sliding block; and

the top end of the front fork and the end part of the connecting rod shaft far away from the steering sliding block are vertically inserted and fixed; the front fork is movably arranged on the bottom plate, and a guide wheel is arranged on the front fork;

and the motion track of the cam thimble on the track groove is in a half double-splayed shape.

Further, the running mechanism further comprises:

the driven shaft transversely penetrates through the two brackets and is rotatably connected with the brackets through a bearing;

the driving wheel is fixedly arranged at one end of the driven shaft; and

and the driven wheel is movably arranged at the other end of the driven shaft.

Furthermore, the driving wheel is connected with the driven shaft through a key; the driven wheel is connected with the driven shaft through a bearing.

Furthermore, the operating mechanism further comprises a fixing frame, the fixing frame is fixed on the bottom plate, and the middle of the fixing frame is connected with the outer side, close to the top end, of the front fork through a bearing.

Furthermore, the running mechanism also comprises a first gear meshed with the second gear, and the first gear is fixedly sleeved on the driven shaft between the support and the driving wheel.

Furthermore, the number of teeth of the first gear is smaller than that of the second gear.

Further, the power mechanism comprises:

the baffle plates are horizontally arranged at the tops of the two brackets;

the fixed pulley upper frame is arranged right opposite to the top of the baffle;

one end of the polish rod is fixed on the baffle, and the other end of the polish rod penetrates through the fixed pulley upper frame;

the fixed pulley bracket is fixed at the bottom of the fixed pulley upper frame; and

the fixed pulley is arranged on the fixed pulley bracket.

Furthermore, the top of the adjusting block is provided with an adjusting groove in sliding fit with the bottom end of the steering sliding block, and the bottom end of the steering sliding block is accommodated in the adjusting groove.

Furthermore, a fine adjustment bolt is inserted into the end part of the adjusting block far away from the connecting rod shaft in a threaded manner, and the rod part of the fine adjustment bolt penetrates into the adjusting groove and then is rotatably connected with the steering sliding block.

Furthermore, a connecting rod groove in sliding fit with the top end of the steering sliding block is formed in the connecting rod shaft.

The utility model has the advantages that:

1. the utility model discloses cylindrical cam structure among the steering mechanism, cylindrical cam friction loss when the transmission is little, transmission efficiency is high, action reaction is sensitive, the low-speed time does not have the phenomenon of crawling to can effectually reduce the whole car volume of dolly among the global design scheme, make the automobile body compacter, and use among the carbon-free dolly, realized two eight characters type orbits of pure mechanical trolley and march.

2. The utility model discloses a trimming bolt adjusts amplitude and leading wheel level adjustable, compensaties the poor fine setting mode in route that the differential brought. On the basis, the differential rods are used for ranging, so that data are more accurate, and debugging is faster.

Drawings

Fig. 1 is a partial front view of a carbon-free cart according to an embodiment of the present invention;

FIG. 2 is a top view of the carbonless cart of FIG. 1;

FIG. 3 is a partial side view of the carbonless cart of FIG. 1;

fig. 4 is a perspective view of the cylindrical cam of fig. 1.

Description of the main symbols:

10-a running mechanism; 11-a base plate; 12-a scaffold; 13-a driven shaft; 14-a driving wheel; 15-driven wheel; 16-a fixing frame; 17-gear one; 20-a power mechanism; 21-a baffle plate; 22-fixed pulley upper frame; 23-a polish rod; 24-a fixed pulley support; 25-a fixed pulley; 30-a steering mechanism; 31-a drive shaft; 32-cylindrical cam; 321-a track groove; 33-gear two; 34-a steering element mount; 35-a steering element; 351-cam nose; 36-a conditioning block; 361-a regulating groove; 362-fine tuning bolts; 37-a steering slider; 38-connecting rod shaft; 381-link slot; 39-front fork; 391-guide wheels.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1, fig. 1 is a partial front view of a carbon-free cart according to an embodiment of the present invention. The carbon-free trolley comprises a running mechanism 10, a power mechanism 20 and a steering mechanism 30.

The running mechanism 10 comprises a bottom plate 11, a bracket 12, a driven shaft 13, a driving wheel 14, a driven wheel 15, a fixed frame 16 and a first gear 17.

The bottom plate 11 is arranged at the bottom of the carbon-free trolley and is used for carrying parts of the carbon-free trolley.

The number of the brackets 12 is two in this embodiment, and the two brackets 12 are symmetrically arranged on two sides of the top of the bottom plate 11. In the present embodiment, the bracket 12 is fixedly connected to the base plate 1 by bolts. Of course, in other embodiments, the bracket 12 and the bottom plate 1 may be fixed by other fixing means, such as nailing.

The driven shaft 13 is a shaft body having a long cylindrical shape as a whole. The driven shaft 13 transversely penetrates through the two brackets 12, and the driven shaft 13 is rotatably connected with the brackets 12 through bearings. In this embodiment, a bearing hole is formed in the support 12, a bearing is embedded in the bearing hole, and the outer side of the driven shaft 13 is connected with the inner ring key of the bearing. So that the driven shaft 13 can rotate relative to the carrier 12.

The driven shaft 13 is parallel to the transmission shaft 31, and the driven shaft 13 is flush with the transmission shaft 31.

The driving wheel 14 is fixedly arranged at one end of the driven shaft 13. There are many fixed mounting manners between the driving wheel 14 and the driven shaft 13, and in this embodiment, the driven shaft 13 is connected with the driving wheel 14 in a key manner, so that the driving wheel 14 rotates synchronously with the driven shaft 13. Of course, in other embodiments, the fixation between the driving wheel 14 and the driven shaft 13 can be realized by other fixing means, such as a bolt and a nut.

The driven wheel 15 is movably arranged at the other end of the driven shaft 13. And the driven pulley 15 is of the same kind of specification as the driving pulley 14. The driven wheel 15 and the driven shaft 13 rotate in a plurality of ways, in this embodiment, the rotation is realized by an embedded bearing, the axis of the driving wheel 14 and the axis of the driven wheel 15 are both coincided with the axis of the driven shaft 13, the embedded bearing is fixedly sleeved on the driven shaft 13, and then the driven wheel 15 is fixedly sleeved on the driven shaft 13.

The carbon-free trolley of the utility model adopts two equal large wheels, one is the driving wheel 14, and the other is the driven wheel 15. From an energy perspective, energy is provided by gravitational potential energy conversion, and a theoretical farthest travel distance can be calculated if the field friction is known. The number of turns of the winding shaft is certain, the number of turns of the driving wheel 14 rolling is also certain, and theoretically, the smaller the diameter of the winding driven shaft 13 is, the larger the diameter of the driving wheel 14 is, and the farther the trolley runs.

The fixing frame 16 is a frame body in a convex shape as a whole. The fixing frame 16 is fixed on the bottom plate 11. In the present embodiment, the fixing frame 16 is fixedly connected to the base plate 1 by bolts. Of course, in other embodiments, the fixing frame 16 and the bottom plate 1 may be fixed by other fixing means, such as nailing.

The bottom plate 11 at the bottom of the fixing frame 16 is provided with a through groove for accommodating the front fork 39. The middle part of the fixed frame 16 is connected with the outer side of the front fork 39 near the top end through a bearing. The middle part of the fixing frame 16 is provided with a bearing groove, and a bearing is embedded in the bearing groove. The top end of the front fork 39 passes through the inner ring of the bearing, and the side wall of the front fork 39 near the top end is in key connection with the inner ring of the bearing. So that the front fork 39 can rotate relative to the fixed frame 16.

The first gear 17 is fixedly sleeved on the driven shaft 13 between the support 12 and the driving wheel 14. In the embodiment, the first gear 17 is connected with the driven shaft 13 through a key, so that the first gear 17 rotates along with the driven shaft 13 synchronously. Of course, in other embodiments, the first gear 17 and the driven shaft 13 may be fixed by other fixing means, such as a bolt and a nut.

Referring to fig. 2, fig. 2 is a top view of the carbon-free cart in fig. 1. The power mechanism 20 is disposed on the two brackets 12, and the power mechanism 20 can provide kinetic energy for the operation of the operation mechanism 10.

The power mechanism 20 is used for converting the gravitational potential energy of the weight into the kinetic energy of a certain part on the trolley. The present embodiment employs a sheave mechanism. The descending speed of the weight can be reduced, the weight stops, the vehicle stops, the slower the weight descends, and the less energy is wasted in the final stage.

The power mechanism 20 comprises a baffle 21, a fixed pulley upper frame 22, a polish rod 23, a fixed pulley bracket 24 and a fixed pulley 25.

The baffle 21 is used for supporting various parts on the upper part of the carbon-free trolley. The baffle 21 is horizontally arranged on the top of the two brackets 12, and the baffle 21 is relatively parallel to the bottom plate 11. In the present embodiment, the baffle 21 and the bracket 12 are fixedly connected by bolts. Of course, in other embodiments, the baffle 21 and the bracket 12 may be fixed by other fixing methods, such as a snap connection.

The fixed sheave upper frame 22 is a plate body like a semicircle. In other embodiments, the fixed pulley upper frame 22 may be a triangular plate, or may be a plate with other shapes as long as the overall stability of the fixed pulley upper frame 22 is not affected. The fixed pulley upper frame 22 is arranged right opposite to the top of the baffle plate 21.

The polish rod 23 is a rod body having a long bar shape as a whole. The number of the polish rods 23 is three in this embodiment, and the three polish rods 23 are distributed in a triangular shape. In other embodiments, the number of the polish rods 23 may be four, and the four polish rods 23 are distributed in a rectangular shape, and other numbers and arrangements may be adopted as long as the supporting stability of the polish rods 23 is not affected.

One end of the polish rod 23 is fixed on the baffle 21, and the other end of the polish rod 23 penetrates through the fixed pulley upper frame 22. In this embodiment, the polish rod 23 is fixedly connected to the retainer 21 and the fixed sheave upper frame 22 by bolts. Of course, in other embodiments, the polish rod 23, the baffle 21 and the fixed pulley upper frame 22 may be mounted by other fixing means, such as pin joint.

The fixed sheave bracket 24 is a frame body for mounting the fixed sheave. The fixed pulley bracket 24 is fixed to the bottom of the fixed pulley upper frame 22. In the present embodiment, the fixed pulley bracket 24 is fixedly connected to the fixed pulley upper frame 22 by bolts. Of course, in other embodiments, the fixed pulley bracket 24 and the fixed pulley upper frame 22 may be fixed by other fixing means, such as nailing.

The fixed pulley 25 is mounted on the fixed pulley bracket 24. The fixed pulley 25 of the present embodiment is divided into a large wheel and a small wheel, which are coaxially mounted on the fixed pulley shaft of the fixed pulley bracket 24.

Thus, the power output process of the power mechanism 20 is: the thin rope is tied on the driven shaft 13, the thin rope is wound into the driven shaft 13 in a circle after being wound initially through a winding hole, the thin rope is led out and wound on a big fixed pulley wheel at the top, the other line is tied on a heavy object after being wound on a small fixed pulley wheel, the heavy object freely falls down along the three vertical polish rods 23, and the driven shaft 13 is pulled to rotate through the thin rope, so that the trolley can move forwards.

Referring to fig. 3, fig. 3 is a partial side view of the carbonless cart of fig. 1. The steering mechanism 30 includes a transmission shaft 31, a cylindrical cam 32, a second gear 33, a steering element support 34, a steering element 35, an adjustment block 36, a steering slider 37, a link shaft 38, and a front fork 39.

The transmission shaft 31 is a shaft body having a long cylindrical shape as a whole. The driven shaft 13 transversely penetrates through the two brackets 12, and the driven shaft 13 is rotatably connected with the brackets 12 through bearings. In this embodiment, a bearing hole is formed in the bracket 12, a bearing is embedded in the bearing hole, and the outer side of the transmission shaft 31 is connected with the inner ring key of the bearing. So that the transmission shaft 31 can rotate relative to the bracket 12.

Referring to fig. 4, fig. 4 is a perspective view of the cylindrical cam in fig. 1. The cylindrical cam 32 is a special modification of a general cylindrical cam having a trace groove 321 in a wave shape on the outer peripheral side thereof. The wavy track groove 321 in this embodiment may be a splayed groove body. The cylindrical cam 32 is fixedly inserted on the transmission shaft 31 between the two brackets 12, and the cylindrical cam 32 can rotate synchronously with the transmission shaft 31.

The cylindrical cam pair containing the cylindrical cam 32 has the advantages of small friction loss, high transmission efficiency, sensitive action response and no creeping phenomenon at low speed, and can effectively reduce the whole volume of the carbon-free trolley and make the trolley body more compact.

The second gear 33 is fixed on the transmission shaft 31, and the second gear 33 is arranged outside the two brackets 12. In the embodiment, the second gear 33 is connected with the transmission shaft 31 through a key, so that the second gear 33 rotates synchronously with the transmission shaft 31. Of course, in other embodiments, the second gear 33 and the transmission shaft 31 may be fixed by other fixing means, such as a bolt and a nut.

In the present embodiment, the number of teeth of the first gear 17 is smaller than that of the second gear 33, and since the number of teeth of the first gear is inversely proportional to the rotation speed, a differential speed is formed between the first gear 17 and the second gear 33. The ratio of the number of teeth of the first gear 17 to the second gear 33 can be set as required.

The first gear 17 and the second gear 33 in the embodiment both adopt primary gears, so that the gear transmission is reliable, the instantaneous transmission ratio is constant, the use efficiency is high, the service life is long, the structure is compact, and the occupied size is small.

The turning original support 34 is a cylindrical barrel as a whole, and a top end of the turning original support 34 has a rod-shaped portion extending upward. The steering original support 34 is provided on the base plate 11. The steering original support 34 and the bottom plate 11 in this embodiment are connected by a bolt and a nut.

Steering element 35 is a block having a generally square shape, and steering element 35 extends outwardly to form a lug-like projection. A turning original 35 is supported on top of the original support 34. Turn to the middle part of original paper 35 and seted up the bearing groove, the bearing is installed to the embedded bearing of establishing in bearing groove, and the inner circle of bearing and the above-mentioned outside key-type connection that turns to the shaft-like portion of original paper support 34 to the feasible original paper 35 that turns to can turn to original paper support 34 relatively rotates.

A cam thimble 351 matched with the track groove 321 is vertically inserted and fixed at one end of the steering original 35 close to the track groove 321. The cam thimble has a rod portion and a ball portion. Turn to and offer the screw hole on the lug of original paper 35, the pole portion screw thread of cam thimble 351 is pegged graft in the screw hole, makes things convenient for the installation and the dismantlement of cam thimble 351.

The ball part of the cam thimble 351 is arranged in the track groove 321, and the motion circle track of the cam thimble 351 on the track groove 321 is half double-splayed. The cylindrical cam 32 is driven to rotate by the rotation of the transmission shaft 31, the side surface of the track groove 321 pushes the ball part of the cam thimble 351 arranged in the track groove 321 to reciprocate along the axial direction, and the rod part of the cam thimble 351 rotates on the bearing in only one direction, so that the reciprocating linear motion of the cam thimble 351 in the axial direction is realized.

The adjustment block 36 is a block body having a rectangular shape as a whole. The adjusting block 36 is fixedly disposed on a top side of the turning element 35 away from the cam thimble 351. In the present embodiment, the adjusting block 36 and the steering element 35 are fixedly connected by a bolt. Of course, in other embodiments, the adjusting block 36 and the steering element 35 may be fixed by other fixing methods, such as nailing.

The top of the adjusting block 36 is provided with an adjusting groove 361 which is in sliding fit with the bottom end of the steering slide block 37. The adjustment groove 361 is an open groove having a long strip shape as a whole. The end of the adjustment block 36 remote from the link shaft 38 is threaded with a fine adjustment bolt 362. The end of the adjusting block 36 away from the connecting rod shaft 38 is provided with a threaded hole, and the rod part of the fine adjustment bolt 362 penetrates through the threaded hole and extends into the adjusting groove 361. The fine adjustment screw 362 in this embodiment can not only effectively limit the turning slider 37 and prevent it from rotating, but also adjust the position of the turning slider 37 in the adjustment groove 361 by screwing the fine adjustment screw 362, thereby adjusting the amplitude.

The utility model discloses it is adjustable to change fine setting bolt and come adjustment amplitude and leading wheel 391 level, compensaties the poor fine setting mode in route that the differential brought. On the basis, the differential rods are used for ranging, so that data are more accurate, and debugging is faster.

The steering slider 37 is a rod body having a rod shape as a whole. The bottom end of the turning sliding block 37 is vertically inserted and fixed on the adjusting block 36, the bottom end of the turning sliding block 37 is contained in the adjusting groove 361, and the rod part of the fine adjusting bolt 362 penetrates into the adjusting groove 361 and then is rotatably connected with the turning sliding block 37. A bearing is provided at the joint of the steering slider 37 and the fine adjustment bolt 362, and the inner ring of the bearing is engaged with the rod portion of the fine adjustment bolt 362. So that the turning screw 362 drives the turning slider 37 to move in the adjusting groove 361 along the length direction of the adjusting groove 361.

The link shaft 38 is a rectangular block as a whole. The top end of the link shaft 38 is provided with a link groove 381 which is slidably fitted to the top end of the steering slider 37. The link groove 381 is a through groove having a long shape as a whole. The end of the link shaft 38 near the steering slider 37 is slidably inserted into the tip of the steering slider 37.

The top end of the front fork 39 is vertically inserted and fixed with the end of the connecting rod shaft 38 far away from the steering slide block 37. The end of the link shaft 38 remote from the steering slider 37 has a threaded hole for threaded connection with the top end of the front fork 39, and the link shaft 38 and the front fork 39 are locked and fixed by a nut.

The front fork 39 is movably arranged on the bottom plate 11. A through groove is formed in the bottom plate 11, and the front fork 39 is accommodated in the through groove of the bottom plate 11. A guide wheel 391 is mounted on the front fork 39.

Therefore, the cylindrical cam pair of the present invention includes the cylindrical cam 32, the steering element 35, the steering slider 37, the cam pin 351 and the connecting rod 38.

The working mode of the steering mechanism is as follows: when the trolley runs, the first gear 17 drives the second gear 33 to rotate and form a differential speed, and the second gear 33 drives the front cylindrical cam 32 to rotate in a single direction while rotating. Because the cylindrical cam 32 is provided with the track groove 321 to form a space closed curve groove, and the track groove 321 makes a half double-splayed track around, when the cylindrical cam 32 makes a unidirectional circular motion, the cam thimble 351 moves along the space closed track groove 321, so as to drive the cam thimble 351 to make a reciprocating linear motion. The cam thimble 351 drives the steering original 35 and the adjusting block 36 to move synchronously, the adjusting block 36 toggles the connecting rod shaft 38 to swing left and right through the steering slide block 37 fixedly connected with the adjusting block, and the connecting rod shaft 38 drives the front fork 39 and the guide wheel 391 on the front fork 39 to swing left and right, so that the guide wheel 391 swings periodically, and the steering of the trolley is realized.

The running mechanism 10, the power mechanism 20 and the steering mechanism 30 of the trolley are combined, so that the aim of the double-splayed movement track of the trolley is fulfilled, and a barrier with a fixed distance is bypassed.

The utility model discloses cylindrical cam structure among the steering mechanism, cylindrical cam friction loss when the transmission is little, transmission efficiency is high, action reaction is sensitive, the low-speed time does not have the phenomenon of crawling to can effectually reduce the whole car volume of dolly among the global design scheme, make the automobile body compacter, and use among the carbon-free dolly, realized two eight characters type orbits of pure mechanical trolley and march. The utility model discloses a trimming bolt adjusts amplitude and leading wheel level adjustable, compensaties the poor fine setting mode in route that the differential brought. On the basis, the differential rods are used for ranging, so that data are more accurate, and debugging is faster.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A pure mechanical low-friction obstacle-crossing double splayed carbon-free trolley comprises:

the running mechanism (10) comprises a bottom plate (11) and two supports (12), and the two supports (12) are symmetrically arranged on two sides of the top of the bottom plate (11); and

the power mechanism (20), the power mechanism (20) is arranged on the two brackets (12), and the power mechanism (20) can provide kinetic energy for the operation of the operation mechanism (10);

the carbon-free trolley is characterized by further comprising a steering mechanism (30), wherein the steering mechanism (30) comprises:

the transmission shaft (31) transversely penetrates through the two brackets (12), and the transmission shaft (31) is rotatably connected with the brackets (12) through bearings;

the cylindrical cam (32) is fixedly inserted on the transmission shaft (31) between the two brackets (12), and the cylindrical cam (32) can synchronously rotate with the transmission shaft (31); the peripheral side of the outer wall of the cylindrical cam (32) is provided with a wavy track groove (321);

the second gear (33) is fixed on the transmission shaft (31), and the second gear (33) is arranged on the outer side of the bracket (12);

a steering original support (34), wherein the steering original support (34) is arranged on the bottom plate (11);

the steering original piece (35), the steering original piece (35) is supported on the top of the original piece support (34), and the steering original piece (35) is rotatably connected with the original piece support (34) through a bearing; one end of the steering original piece (35) close to the track groove (321) is vertically inserted and fixed with a cam thimble (351) matched with the track groove (321);

the adjusting block (36) is fixedly arranged on one side, away from the top of the cam thimble (351), of the steering original piece (35);

the bottom end of the steering sliding block (37) is vertically inserted and fixed on the adjusting block (36);

the end part of the connecting rod shaft (38), which is close to the steering sliding block (37), is in sliding insertion connection with the top end of the steering sliding block (37); and

the top end of the front fork (39) is vertically inserted and fixed with the end part, far away from the steering sliding block (37), of the connecting rod shaft (38); the front fork (39) is movably arranged on the bottom plate (11), and a guide wheel (391) is arranged on the front fork (39);

wherein, the motion track of the cam thimble (351) on the track groove (321) is half double-splayed.

2. The pure mechanical low-friction obstacle-crossing double V-shaped carbon-free trolley according to claim 1, wherein the running mechanism (10) further comprises:

the driven shaft (13) transversely penetrates through the two brackets (12), and the driven shaft (13) is rotatably connected with the brackets (12) through bearings;

the driving wheel (14), the said driving wheel (14) is fixed to one end of the driven shaft (13); and

and the driven wheel (15), wherein the driven wheel (15) is movably arranged at the other end of the driven shaft (13).

3. The pure mechanical low-friction obstacle-crossing double splayed carbon-free trolley as claimed in claim 2, characterized in that the driving wheel (14) is connected with the driven shaft (13) through a key; the driven wheel (15) is connected with the driven shaft (13) through a bearing.

4. The pure mechanical low-friction obstacle-crossing double splayed carbon-free trolley according to claim 1, wherein the running mechanism further comprises a fixed frame (16), the fixed frame (16) is fixed on the bottom plate (11), and the middle part of the fixed frame (16) is connected with the outer side, close to the top end, of the front fork (39) through a bearing.

5. The pure mechanical low-friction obstacle-crossing double splayed carbon-free trolley as claimed in claim 1, wherein the running mechanism further comprises a first gear (17) meshed with a second gear (33), and the first gear (17) is fixedly sleeved on the driven shaft (13) between the support (12) and the driving wheel (14).

6. The pure mechanical low-friction carbon-free double V-shaped trolley with the obstacle crossing function as claimed in claim 5, wherein the number of teeth of the gear I (17) is smaller than that of the gear II (33).

7. The pure mechanical low-friction carbon-free double V-shaped trolley with the obstacle crossing function as claimed in claim 1, wherein the power mechanism (20) comprises:

the baffle plates (21) are horizontally arranged at the tops of the two brackets (12);

the fixed pulley upper frame (22), the fixed pulley upper frame (22) is arranged on the top of the baffle plate (21) in a right-facing manner;

one end of the polish rod (23) is fixed on the baffle (21), and the other end of the polish rod (23) penetrates through the fixed pulley upper frame (22);

the fixed pulley support (24), the said fixed pulley support (24) is fixed to the bottom of the fixed pulley upper rack (22); and

the fixed pulley (25) is arranged on the fixed pulley bracket (24).

8. The pure mechanical low-friction obstacle-crossing double splayed carbon-free trolley according to claim 1, wherein an adjusting groove (361) in sliding fit with the bottom end of the steering sliding block (37) is formed in the top of the adjusting block (36), and the bottom end of the steering sliding block (37) is accommodated in the adjusting groove (361).

9. The pure mechanical low-friction obstacle-crossing double splayed carbon-free trolley as claimed in claim 8, wherein a fine adjustment bolt (362) is inserted in a threaded manner at the end of the adjusting block (36) far away from the connecting rod shaft (38), and the rod part of the fine adjustment bolt (362) penetrates into the adjusting groove (361) and then is rotatably connected with the steering sliding block (37).

10. The pure mechanical low-friction obstacle-crossing double splayed carbon-free trolley according to claim 1, wherein the connecting rod shaft (38) is provided with a connecting rod groove (381) which is in sliding fit with the top end of the steering sliding block (37).

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