CN110104046B

CN110104046B - Anti-tilting trolley

Info

Publication number: CN110104046B
Application number: CN201910302704.7A
Authority: CN
Inventors: 刘名霞; 刘丽萍; 王光
Original assignee: Rizhao Qingchuang Intellectual Property Service Center
Current assignee: Rizhao Qingchuang Intellectual Property Service Center
Priority date: 2017-05-09
Filing date: 2017-05-09
Publication date: 2020-04-24
Anticipated expiration: 2037-05-09
Also published as: CN107128146A; CN109969274A; CN110104046A; CN107128146B; CN109910537A

Abstract

The invention discloses an anti-tilting handcart, which belongs to the field of agricultural machinery and is characterized in that: comprises a vehicle body, wheels and wheel carriers; the vertical frame of the wheel frame is positioned on the side of the vehicle body; the upper end of the wheel carrier is provided with a first spring; the inner side surface of the vertical frame is provided with a groove structure; a control block is arranged between the two groups of ratchet structures; a water tank is arranged below the control block, and a floater is arranged in the water tank; the vertical frame is provided with a horizontal hole, the horizontal hole penetrates through the horizontal shaft, a sleeve sleeved on the horizontal shaft is arranged in the middle of the horizontal shaft, and a gear is arranged on the outer side surface of the sleeve structure; a rack fixed on the frame is arranged on the front side of the gear; a first chain wheel is arranged on the outer side of the gear; a vertical mandril is arranged at a position close to the outer side surface of the vertical frame; the lower end of the vertical ejector rod is provided with a fourth spring, and a stop block fixed on the frame is arranged above the vertical ejector rod. Compared with the prior art have the characteristics that walking is steady to prevent empting.

Description

Anti-tilting trolley

Technical Field

The invention discloses a divisional application of an agricultural and forestry machine transportation trailer (application number: 2017103216463), and relates to agricultural machinery, in particular to an anti-tilting trolley.

Background

When the farmland fruit forest hydraulic equipment is used in the field, the field is uneven, the automobile cannot enter the farmland, the scientific research or other operation belt has more article equipment, the manpower back-carrying is too heavy, but the damage of the equipment caused by bumping and road surface inclination of the ordinary small-sized trailer can even cause the automobile body to topple. The chassis is reduced and widened, so that the balance of the vehicle body can be kept to a certain degree to prevent toppling, and the lower chassis and the wider vehicle body can not move in a forest or between ridges.

Disclosure of Invention

The technical task of the invention is to provide a handcart which can walk stably and prevent toppling over aiming at the defects of the prior art.

The technical scheme for solving the technical problem is as follows: an anti-tilting handcart comprises a handcart body, wheels, a wheel carrier, a hand-pulling towing rod and supporting legs; the two wheels and the two wheel carriers are respectively positioned at the front positions of the two sides of the vehicle body, the wheel axle where each wheel is positioned is respectively arranged at the lower end of one wheel carrier, and the wheel axle is rotatably connected with the wheel carriers; the method is characterized in that: the device also comprises a water tank, a floater, a vertical shaft and a bevel gear; a traction hook is arranged in front of the vehicle body and is used for being connected with a power device; the wheel carrier is vertically arranged on the machine body, the machine body is provided with a limiting mechanism for limiting the movement of the wheel carrier, and the limiting mechanism is used for limiting the wheel carrier to move only along the up-down direction; the inner side of each wheel carrier is provided with a vertical shaft, the wheel carriers are provided with fixed blocks connected with the vertical shafts, the fixed blocks are fixedly connected with the wheel carriers, the fixed blocks are provided with vertical holes, the vertical shafts penetrate through the vertical holes, and flanges are respectively arranged at the positions, located at the two ends of the fixed blocks, of the vertical shafts, so that the positions, located on the vertical shafts, of the fixed blocks are fixed; the upper end of the vertical shaft is provided with threads, the section forms a screw rod structure, a threaded hole matched with the upper end of the vertical shaft is formed in the position, located at the upper end of the vertical shaft, of the machine body, and the upper end of the vertical shaft is located in the threaded hole; a gear drum is arranged on the vertical shaft below the fixed block, a vertical hole is formed in the middle of the gear drum, the gear drum is sleeved on the vertical shaft through the vertical hole, a vertical bar is arranged on the vertical shaft at the position of the gear drum, and a vertical groove matched with the vertical bar is formed in the inner wall of the vertical hole of the gear drum; the gear cylinder is provided with an upper vertical bevel gear and a lower vertical bevel gear, the specifications of the two vertical bevel gears are the same, the axes of the two vertical bevel gears are coincident with the axis of the vertical shaft, the upper bevel gear in the two vertical bevel gears faces downwards, and the lower bevel gear faces upwards; the inner end of the wheel shaft is provided with a horizontal bevel gear, the axis of the horizontal bevel gear is coincident with the axis of the wheel shaft, and the horizontal bevel gear is positioned between two vertical bevel gears and can be meshed with one vertical bevel gear; the gear cylinder is provided with a cylinder, the cylinder is sleeved outside a certain section of the gear cylinder, and flanges are respectively arranged at the positions, located at the two ends of the cylinder, of the gear cylinder; a water tank is arranged in the inner side direction of each vertical shaft and is fixed on the machine body, a floater is arranged in the water tank, the upper end of the floater extends out of the water tank, water or other liquid is contained in the water tank, the floater floats by the buoyancy of the water, and the water tanks are communicated with each other through water pipes; a gear rod group is arranged between the water tank and the vertical shaft, the gear rod group comprises a vertical gear rod and two gears, a sliding rail and a sliding groove structure which are matched with each other are arranged between the machine body and the gear rod, and the gear rod is limited to move only in the vertical direction through the sliding rail and sliding groove structure; the fixed block and the cylinder are respectively and fixedly provided with a first rack and a second rack, and a sliding rail and a sliding chute which are matched with each other are arranged between the first rack and the second rack; the machine body and the floater are respectively provided with a third rack and a fourth rack, wherein the first rack and the second rack are positioned on the outer side of the gear rod, the third rack and the fourth rack are positioned on the inner side of the gear rod, the first rack and the third rack are respectively meshed with the first gear, and the second rack and the fourth rack are respectively meshed with the second gear; a flange is arranged on the vertical shaft and below the gear drum, a seventh spring is arranged between the flange and the gear drum, and the seventh spring is sleeved on the vertical shaft; a vertical hole is formed in the position, located at the lower end of the vertical shaft, of the machine body, and the lower end of the vertical shaft is located in the vertical hole; the two hand-pulling towing rods and the two support legs are respectively positioned at two sides of the rear end of the vehicle body; the two hand-pulling towing rods and the two supporting legs are fixedly connected through a cross rod respectively, so that the two hand-pulling towing rods and the two supporting legs can move synchronously; the front end of the hand-pulling towing rod is hinged with the vehicle body, and a position above the hand-pulling towing rod on the vehicle body is provided with a limiting structure which can limit the hand-pulling towing rod to be lifted to a horizontal state only; the middle or the upper position of the middle of the supporting leg is hinged with the vehicle body, and the upper end of the supporting leg is propped against the hand-pulling towing rod; a protruding structure is arranged on the hand-pulling towing rod and positioned on the front side of the upper end of the supporting leg; the upper ends of the supporting legs are connected with the positions of the vehicle body below the supporting legs through five springs, and the positions of the hand-pulling towing rod and the position of the vehicle body below the hand-pulling towing rod are connected through six springs.

Compared with the prior art, the invention has the advantages of stable walking and falling prevention:

drawings

FIG. 1 is a schematic side view of

embodiments

1 and 3.

Fig. 2 is a schematic side view of the wheel attachment structure according to embodiment 1.

FIG. 3 is a sectional view taken along line A-A in FIG. 1 in example 1.

Fig. 4 is a schematic structural view of the vertical frame and the control block in embodiment 1.

Fig. 5 is a schematic structural view of the vertical jack in embodiment 1.

FIG. 6 is a schematic side view of

embodiments

2 and 4.

FIG. 7 is a sectional view taken along the line of FIG. 1A-A in example 3.

Detailed Description

The invention is further described with reference to the drawings and the detailed description. For convenience of description, hereinafter, "inside" and "outside" refer to the middle direction and the outer direction of the entire apparatus, and "front" and "rear" in

embodiments

1 and 3 refer to the forward direction and the backward direction of the entire apparatus.

In embodiment 1, as shown in fig. 1 to 5, the invention includes a vehicle body 1, a wheel 13, and a wheel carrier 10. The front of the vehicle body 1 is provided with a traction hook for connecting with a power device, and the power device can be a narrow-distance motor vehicle such as a two-wheeled motorcycle and the like, but is not limited to the narrow-distance motor vehicle.

The number of the wheels 13 and the wheel carriers 10 is four, each wheel 13 is respectively installed at the lower end of one wheel carrier 10, and the wheel shaft 19 where the wheel 13 is located penetrates through the horizontal hole at the lower end of the wheel carrier 10 to form a rotary connection with the wheel carrier 10. The wheel carrier 10 is located at the side of the vehicle body 1, the two sides of the wheel carrier are symmetrically arranged, the vehicle body 1 is provided with a limiting mechanism for limiting the movement of the wheel carrier 10, and the limiting mechanism is used for limiting the wheel carrier 10 to move only in the up-and-down direction. The limiting mechanism can be a structure surrounding the wheel frame 10 to prevent the wheel frame 10 from moving and rotating in the horizontal direction; the mechanism may be a guide rail in the vertical direction to limit the wheel frame 10 to move only in the vertical direction; the limiting mechanism can also be other structures capable of realizing the function in the prior art.

The upper end of the wheel carrier 10 is provided with a first spring 2, the upper end of the first spring 2 is propped against the vehicle body 1, and the vehicle body 1 is supported by the two first springs 2 on the two groups of wheel carriers 10.

The inner side surface of the wheel frame 10 is provided with a groove structure 29, the inner side surface of the wheel frame 10 is provided with a group of ratchet structures 30 at the front side and the rear side of the groove structure 29, the upper tooth surface of each ratchet structure 30 is an inclined surface inclined inwards and downwards, and the lower tooth surface of each ratchet structure 30 is a horizontal surface, so that when the ratchet 30 is matched with the pawl 32, the wheel frame 10 can move upwards freely and cannot move downwards. A control block 15 is arranged between the two groups of ratchet structures 30, the middle position of the control block 15 is hinged with the vehicle body 1, and the structure hinged with the control block 15 on the vehicle body 1 is an extension part (not shown in the figure) extending towards the middle of the control block 15 on the vehicle body 1. The hinge joint is provided with a torsion spring (not shown in the figure) which gives the lower end of the control block 15 an elastic force in the outward direction. In a natural state, the inner side surface of the control block 15 forms an inclined surface extending from the lower part to the upper part. The lower end of the control block 15 extends to the front and the back to form a pawl 32 matched with the ratchet structure 30, and the pawl 32 is positioned in the tooth slot of the ratchet structure 30. The upper end of the control block 15 is provided with a thimble structure 31 protruding outwards.

A water tank 17 is arranged below the control block 15, water or other liquid media are contained in the water tank 17, the water tanks 17 on the vehicle body 1 are communicated through water pipes, a floater 18 is arranged in the water tank 17, the upper end of the floater 18 extends out of an upper opening of the water tank 17, the upper end of the floater 18 is positioned below the inner side face of the control block 15 in a balanced state of the trailer, when the trailer inclines, the water level in the water tank 17 on the lower side rises, the floater 18 rises along with the water level, and the upper end of the floater 18 can be propped against the inner side face of the control block 15 and push the.

The groove 29 of the wheel carrier 10 is internally provided with a vertical plate 14, and the lower end of the vertical plate 14 is hinged with the wheel carrier 10. The wheel carrier 10 is provided with a horizontal hole, a horizontal shaft 27 penetrates through the horizontal hole, the inner end of the horizontal shaft 27 is abutted against the outer side face of the vertical plate 14, a sleeve 22 sleeved on the horizontal shaft 27 is arranged in the middle of the horizontal shaft 27, a gear 21 is arranged on the outer side face of the sleeve 22 structure, the sleeve 22 and the horizontal shaft 27 are in clearance fit, the sleeve 22 can freely move on the horizontal shaft 27, and the gear 21 can freely rotate around the sleeve 22. The rack 3 fixed to the vehicle body 1 is provided on the front side of the gear 21, and the rack 3 is engaged with the gear 21. The outer side of the gear 21 is provided with a first chain wheel 4, the first chain wheel 4 is sleeved on a horizontal shaft 27 through a bearing 25, and the inner ring and the outer ring of the bearing 25 are in interference fit with the horizontal shaft 27 and the first chain wheel 4 respectively so as to be fixedly connected. A second spring 24 is arranged between the bearing 25 and the sleeve 22, and the second spring 24 is sleeved on a horizontal shaft 27. Teeth 23 capable of being engaged with each other are provided on the outer side surface of the gear 21 and the inner side surface of the first sprocket 4, respectively, to form a pair of dog clutches. The periphery of the gear 21 and the first chain wheel 4 is provided with a U-shaped frame 5, two ends of the U-shaped frame 5 are fixedly connected with the wheel frame 10, the inner side surface of the U-shaped frame 5 is provided with a horizontal blind hole, the bottom end of the horizontal blind hole is provided with a third spring 26, and the outer end of the horizontal shaft 27 is positioned in the blind hole and abuts against the third spring 26. Be close to the position on the wheel carrier 10 lateral surface and be equipped with vertical ejector pin 6, be equipped with vertical bar hole 28 on the vertical ejector pin 6, horizontal axis 27 pass vertical ejector pin 6 from bar hole 28 and be located between wheel carrier 10 and the sleeve 22, vertical ejector pin 6 is big end down along the thickness of inside and outside direction, consequently when vertical ejector pin 6 rose, can be ejecting with the outside direction of sleeve 22, vertical ejector pin 6 lags behind down, under No. two spring 24's effect, can promote sleeve 22 and remove to the inside direction. The lower end of the vertical mandril 6 is provided with a fourth spring 7.

The wheel shaft 19 is fixedly connected with a second chain wheel 11, and the second chain wheel 11 is connected with the first chain wheel 4 through a chain 12.

When the trailer runs on a horizontal road, the wheel carrier is positioned at a higher position on the vehicle body 1, the horizontal shaft 27 is positioned at a position above the strip-shaped hole 28 of the vertical mandril 6, and the first chain wheel 4 is separated from the gear 21 through the action of the second spring 24 as shown in figure 3. The pawl 32 formed by the extension of the lower end of the control block 15 is positioned on the ratchet 30 to hold the ratchet 30 and the wheel frame is in a fixed position. When the trailer runs on an inclined road surface, the trailer is high on one side and low on the other side, the water surface of the water tank 17 on the lower side of the trailer rises relatively, the floater 18 is jacked up through buoyancy, the floater 18 jacks the control block 15, the upper end of the control block 15 rotates outwards, the lower end of the control block 15 rotates inwards, the upper end of the control block 15 jacks the horizontal shaft 27 outwards through the vertical plate 14, the first chain wheel 4 moves outwards along with the horizontal shaft 27, so that the first chain wheel 4 is prevented from being meshed with the gear 21, a pawl 32 structure formed by an extension part on the lower end of the control block 15 is disengaged from the ratchet 30, the wheel carrier is popped downwards through the action of the first spring 2, so that the side vehicle body 1 is supported, the vehicle body 1 tends to be. When the trailer runs to a horizontal road surface, the water level in the water tank 17 descends, the floater 18 descends, the control block 15 resets, the wheel frame 10 is still located at a lower position at the moment, the upper end of the vertical ejector rod 6 is always abutted to the vehicle body under the action of the fourth spring 7, the sleeve 22 is abutted to a thicker position below the vertical ejector rod 6 at the moment, the sleeve 22 is ejected outwards by the vertical ejector rod 6 for a certain distance, because the upper end of the control block 15 is not abutted to the vertical plate 14 at the moment, the horizontal shaft 27 and the first chain wheel 4 are simultaneously pushed inwards for a certain distance under the action of the third spring 26, so that the first chain wheel 4 and the gear 21 can be meshed, because the trailer runs forwards at the moment, the wheels 13 rotate, the wheel shaft 19 drives the first chain wheel 4 to rotate through the second chain wheel 11 and the chain 12, the first chain wheel 4 drives the gear 21 to rotate, and because the gear 21 is meshed with the rack 3, therefore, the trolley moves upwards along the rack 3, meanwhile, the horizontal shaft 27 drives the wheel carrier to move upwards, after the wheel carrier is reset, the trailer completely returns to be horizontal, the vertical mandril is pushed downwards by the trolley body 1 in the ascending process of the wheel carrier, the thickness of the position where the sleeve 22 is contacted with the vertical mandril 6 is gradually reduced in the downward motion process of the vertical mandril 6, the sleeve 22 and the gear 21 are pushed inwards under the action of the second spring 24, the horizontal shaft 27 cannot move inwards continuously due to the blocking of the control block 15 and the vertical plate 14, and therefore the first chain wheel 4 is separated from the gear 21, and the gear 21 stops moving.

When the trailer disclosed by the invention runs to an inclined road surface, the balance of the body can be automatically adjusted, so that the trailer is prevented from toppling.

As shown in figure 1, the embodiment 1 is suitable for the agricultural and forestry transfer of a large number of articles, the distance between the front and the back of the vehicle body 1 is long, 4 wheels 13 are required to advance, and the 4 wheels 13 respectively have the capability of automatically adjusting balance.

As shown in fig. 6, the embodiment 2 is used for manual traction of a single person and has strong maneuverability. The traditional handcart has the advantages that the wheels are arranged in the front, the handlebars are arranged in the rear, the front of the handcart body is high and the rear of the handcart body is low when the handcart is placed on the ground, the front of the handcart body is low and the rear of the handcart body is high when the handlebars are lifted, cylindrical objects such as sacks or the like or irregular objects or placed objects are too high on the handcart body, the objects on the handcart body are easy to roll or topple forwards or backwards, and for a double-wheel push-pull handcart, when the road surface is uneven, the objects on the handcart body are easy to roll or topple leftwards or.

The hand-operated cart in this embodiment and embodiment 4 is capable of being pulled and pushed, and for convenience of description, the direction of the wheels 13 is set to be front and the direction of the pull rod 51 is set to be rear in this embodiment and embodiment 4.

On the basis of the technical scheme of the embodiment 1, the two wheels 13 and the two wheel carriers 10 are respectively located at the front positions of the two sides of the vehicle body 1, and the hand-pulling device further comprises two hand-pulling rods 51 and two supporting legs 53, wherein the two hand-pulling rods 51 and the two supporting legs 53 are respectively located at the two sides of the rear end of the vehicle body 1. The two hand pulling rods 51 and the two supporting legs 53 are fixedly connected through a cross rod respectively, so that the two hand pulling rods 51 and the two supporting legs 53 can move synchronously respectively. The front end of the hand pulling towing rod 51 is hinged with the vehicle body 1, a position above the hand pulling towing rod 51 on the vehicle body 1 is provided with a limiting structure, and the limiting structure can limit the hand pulling towing rod 51 to be lifted to a horizontal state only. The middle or the upward position of the middle of the supporting leg 53 is hinged with the vehicle body 1, the upper end of the supporting leg 53 is propped against the hand-pulling towing rod 51, and the upper end of the supporting leg 53 plays a limiting role in limiting the hand-pulling towing rod 51 and can limit the downward rotation angle of the hand-pulling towing rod 51. The pull rod 51 is provided with a protrusion 50 at a position in front of the upper end of the leg 53, and the protrusion 50 can block the upper end of the leg 53 to limit the forward rotation of the upper end of the leg 53. The upper ends of the supporting legs 53 are connected with the positions of the vehicle body 1 below the supporting legs through a fifth spring 54, and the pull rod 51 is connected with the position of the vehicle body 1 below the pull rod through a sixth spring 52.

Realize artifical pulling or promote automobile body 1 through hand power tow bar 51's effect, during the use, at first lift up hand power tow bar 51, hand power tow bar 51 lifts up the back, and landing leg 53 upper end has broken away from protruding structure 50's restriction, and the effect through No. five springs 54 pulls landing leg 53 to the horizontality to pack up landing leg 53, so that push-and-pull the trailer, and can keep at push-and-pull in-process automobile body 1 level all the time. When the vehicle is driven to a destination and parked, the supporting legs 53 are put down in a pedal mode, and the positions of the supporting legs 53 are locked through the protruding structures 50 after the pull-handle pull rod 51 is put down.

The other structure of the manual cart is the same as that of embodiment 1.

The manual trailer in the embodiment can keep the front and the rear of the vehicle body horizontal all the time when the vehicle travels and parks, and the left side and the right side can also be kept horizontal when the vehicle travels on a road surface with uneven left and right sides, so that the stability of articles on the vehicle body 1 can be improved.

In embodiment 3, as shown in fig. 1 and 7, the present embodiment includes a body 1, wheels 13, a wheel carrier 10, a water tank 17, a float 18, a vertical shaft 20, and bevel gears. The front of the vehicle body 1 is provided with a traction hook for connecting with a power device, and the power device can be a narrow-distance motor vehicle such as a two-wheeled motorcycle and the like, but is not limited to the narrow-distance motor vehicle.

The number of the wheels 13 and the wheel frames 10 is four, the wheel axle 19 of each wheel 13 is respectively arranged at the lower end of one wheel frame 10, and the wheel axle 19 is rotatably connected with the wheel frames 10. The wheel carrier 10 is vertically installed on the machine body 1, a limiting mechanism for limiting the movement of the wheel carrier 10 is arranged on the machine body 1, and the limiting mechanism is used for limiting the wheel carrier 10 to move only in the up-down direction. The limiting mechanism can be a structure surrounding the wheel frame 10 to prevent the wheel frame 10 from moving and rotating horizontally; the limiting mechanism can also be a guide rail along the vertical direction so as to limit the wheel frame 10 to move only along the vertical direction; the limiting mechanism can also be other structures capable of realizing the function in the prior art.

The inboard of every wheel carrier 10 respectively is equipped with a vertical axle 20, is equipped with the fixed block 8 of being connected with vertical axle 20 on the wheel carrier 10, fixed block 8 and wheel carrier 10 fixed connection, be equipped with vertical hole on the fixed block 8, vertical axle 20 pass this vertical hole, the position that lies in fixed block 8 both ends on the vertical axle 20 is equipped with the flange respectively to fix the position that the fixed block 8 lies in vertical axle 20.

The upper end of the vertical shaft 20 is provided with a thread 9, the section forms a screw structure, a threaded hole 37 matched with the upper end of the vertical shaft 20 is arranged at the position of the upper end of the vertical shaft 20 on the machine body 1, and the upper end of the vertical shaft 20 is arranged in the threaded hole 37. When the vertical shaft 20 is rotated, the vertical shaft 20 can be moved up and down by the screw thread 9.

Vertical axle 20 on the position that lies in fixed block 8 below be equipped with gear barrel 34, the centre of gear barrel 34 is equipped with vertical hole, through this vertical hole gear barrel 34 cover on vertical axle 20, the position that lies in gear barrel 34 on vertical axle 20 is equipped with vertical strip 16, be equipped with on the inner wall in the vertical hole of gear barrel 34 with vertical strip 16 vertical groove that suits, can make gear barrel 34 and vertical axle 20 between along the free relative motion of upper and lower direction through the effect of vertical strip 16 and vertical groove, and can not rotate relatively.

The gear cylinder 34 is provided with an upper vertical bevel gear 35 and a lower vertical bevel gear 35, the specifications of the two vertical bevel gears 35 are the same, the axes of the two vertical bevel gears 35 coincide with the axis of the vertical shaft 20, the tooth surface of the upper bevel gear 35 of the two vertical bevel gears 35 faces downwards, and the tooth surface of the lower bevel gear faces upwards. The inner end of the wheel shaft 19 is provided with a horizontal bevel gear 33, the axis of the horizontal bevel gear 33 is coincident with the axis of the wheel shaft 19, and the horizontal bevel gear 33 is positioned between two vertical bevel gears 35 and can be meshed with one vertical bevel gear 35.

The gear cylinder 34 is provided with a cylinder 36, the cylinder 36 is sleeved outside a certain section of the gear cylinder 34, flanges are respectively arranged at the positions of two ends of the cylinder 36 on the gear cylinder 34, and the cylinder 36 is limited by the flanges to only rotate but not move up and down relative to the gear cylinder 34. A water tank 17 is respectively arranged in the inner side direction of each vertical shaft 20, the water tank 17 is fixed on the machine body 1, a floater 18 is arranged in the water tank 17, the upper end of the floater 18 extends out of the water tank 17, the water tank 17 is filled with water or other liquid, the floater 18 is floated by the buoyancy of the water, and the water tanks 17 are respectively communicated with each other through water pipes.

The water tank 17 and the vertical shaft 20 are provided with a gear rod group, the gear rod group comprises a vertical gear rod 41 and two gears, a sliding rail and a sliding groove structure 40 which are matched with each other are arranged between the machine body 1 and the gear rod 41, and the gear rod 41 is limited to move only in the vertical direction through the sliding rail and sliding groove structure 40. The gear rod 41 is respectively provided with a first gear 43 and a second gear 44, the fixed block 8 and the cylinder 36 are respectively and fixedly provided with a first rack 39 and a second rack 46, a sliding rail and a sliding groove 38 which are matched with each other are arranged between the first rack 39 and the second rack 46, and the second rack 46 and the cylinder 36 can not rotate but only can move vertically under the action of the sliding rail sliding groove 38. A third rack 42 and a fourth rack 45 are respectively arranged on the machine body 1 and the floater 18, wherein the first rack 39 and the second rack 46 are positioned on the outer side of the gear rod 41, the third rack 42 and the fourth rack 45 are positioned on the inner side of the gear rod 41, the first rack 39 and the third rack 42 are respectively meshed with the first gear 43, and the second rack 46 and the fourth rack 45 are respectively meshed with the second gear 44.

The spacing between the fixed block 8 and the cylinder 36 is always variable by the action of the gear-lever set as a function of the position of the float 18. The gear bar set moves along with the movement of the wheel frame 10 through the action of the first rack 39, the third rack 42 and the first gear 43, and the moving speed and distance of the gear bar set are half of those of the wheel frame 10, when the position of the floater 18 is not moved, the position of the cylinder 36 relative to the wheel frame 10 does not change, no matter whether the position of the wheel frame 10 moves or not; the gear drum 34 is driven to move up and down in opposite directions relative to the vertical shaft 20 when the position of the float 18 changes, and is not disturbed by the up and down movement of the vertical shaft 20 throughout the process. When the gear cylinder 34 moves upwards, the horizontal bevel gear 33 is meshed with the vertical bevel gear 35 below; when the gear cylinder 34 moves downwards, the horizontal bevel gear 33 is meshed with the vertical bevel gear 35 above; when the gear cylinder 34 is located at the neutral position, the horizontal bevel gear 33 does not mesh with any vertical bevel gear 35.

A flange 49 is arranged on the vertical shaft 20 below the gear drum 34, a seven-gauge spring 47 is arranged between the flange 49 and the gear drum 34, and the seven-gauge spring 47 is sleeved on the vertical shaft 20. The gear drum 34 is jacked up through the action of the seven-gauge spring 47, the weight of the gear drum 34 is offset, and the floater 18 can more easily drive the gear drum 34 to move up and down.

A vertical hole 48 is formed in the body 1 at a lower end of the vertical shaft 20, and the lower end of the vertical shaft 20 is positioned in the vertical hole 48.

When the trailer walks on an inclined plane, water in the water tank 17 in the direction of one end above the slope flows into the water tank 17 in the direction of the lower side through the water pipe, the water level in the water tank 17 in the direction of the lower side rises, the floater 18 is jacked up upwards through buoyancy, the floater 18 drives the gear cylinder 34 to move downwards relative to the vertical shaft 20 through the linkage, the horizontal bevel gear 33 is meshed with the vertical bevel gear 35 above, the wheels 13 drive the horizontal bevel gear 33 to rotate through the wheel shafts 19, the horizontal bevel gear 33 and the vertical bevel gear 35 above drive the vertical shaft 20 to rotate in the forward direction, the vertical shaft 20 is driven to move downwards through the action of the upper end of the vertical shaft 20 and the threaded hole 37, the vertical shaft 20 drives the wheel carrier 10 to move downwards through the fixing block 8, so that the wheels 13 are pushed to move downwards; meanwhile, the water level in the water tank 17 in the upper side direction of the slope descends, the floater 18 descends, the driving gear moves upwards relative to the vertical bevel gear 35 through the connecting rod group, the horizontal bevel gear 33 is meshed with the vertical bevel gear 35 below, the horizontal bevel gear 33 and the vertical bevel gear 35 below drive the vertical shaft 20 to rotate in the opposite direction, the vertical shaft 20 moves upwards, the vertical shaft 20 pushes the wheels 13 to move upwards through the wheel carrier 10, and therefore the side body 1 correspondingly descends, the inclined body 1 is balanced, and the risk that the trailer topples over is avoided.

In embodiment 4, as shown in fig. 6, based on the technical solution of embodiment 3, the two wheels 13 and the two wheel carriers 10 are respectively located at positions near the front of two sides of the vehicle body 1, and the vehicle further includes two pull rods 51 and two support legs 53, where the two pull rods 51 and two support legs 53 are respectively located at two sides of the rear end of the vehicle body 1. The two hand pulling rods 51 and the two supporting legs 53 are fixedly connected through a cross rod respectively, so that the two hand pulling rods 51 and the two supporting legs 53 can move synchronously respectively. The front end of the hand pulling towing rod 51 is hinged with the vehicle body 1, a position above the hand pulling towing rod 51 on the vehicle body 1 is provided with a limiting structure, and the limiting structure can limit the hand pulling towing rod 51 to be lifted to a horizontal state only. The middle or the upward position of the middle of the supporting leg 53 is hinged with the vehicle body 1, the upper end of the supporting leg 53 is propped against the hand-pulling towing rod 51, and the upper end of the supporting leg 53 plays a limiting role in limiting the hand-pulling towing rod 51 and can limit the downward rotation angle of the hand-pulling towing rod 51. The pull rod 51 is provided with a protrusion 50 at a position in front of the upper end of the leg 53, and the protrusion 50 can block the upper end of the leg 53 to limit the forward rotation of the upper end of the leg 53. The upper ends of the supporting legs 53 are connected with the positions of the vehicle body 1 below the supporting legs through a fifth spring 54, and the pull rod 51 is connected with the position of the vehicle body 1 below the pull rod through a sixth spring 52.

The other structure of the manual cart is the same as that of embodiment 3.

It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.

Claims

1. An anti-tilting handcart comprises a handcart body, wheels, a wheel carrier, a hand-pulling towing rod and supporting legs; the two wheels and the two wheel carriers are respectively positioned at the front positions of the two sides of the vehicle body, the wheel axle where each wheel is positioned is respectively arranged at the lower end of one wheel carrier, and the wheel axle is rotatably connected with the wheel carriers; the method is characterized in that: the device also comprises a water tank, a floater, a vertical shaft and a bevel gear; a traction hook is arranged in front of the vehicle body and is used for being connected with a power device; the wheel carrier is vertically arranged on the machine body, the machine body is provided with a limiting mechanism for limiting the movement of the wheel carrier, and the limiting mechanism is used for limiting the wheel carrier to move only along the up-down direction; the inner side of each wheel carrier is provided with a vertical shaft, the wheel carriers are provided with fixed blocks connected with the vertical shafts, the fixed blocks are fixedly connected with the wheel carriers, the fixed blocks are provided with vertical holes, the vertical shafts penetrate through the vertical holes, and flanges are respectively arranged at the positions, located at the two ends of the fixed blocks, of the vertical shafts, so that the positions, located on the vertical shafts, of the fixed blocks are fixed; the upper end of the vertical shaft is provided with threads, the section forms a screw rod structure, a threaded hole matched with the upper end of the vertical shaft is formed in the position, located at the upper end of the vertical shaft, of the machine body, and the upper end of the vertical shaft is located in the threaded hole; a gear drum is arranged on the vertical shaft below the fixed block, a vertical hole is formed in the middle of the gear drum, the gear drum is sleeved on the vertical shaft through the vertical hole, a vertical bar is arranged on the vertical shaft at the position of the gear drum, and a vertical groove matched with the vertical bar is formed in the inner wall of the vertical hole of the gear drum; the gear cylinder is provided with an upper vertical bevel gear and a lower vertical bevel gear, the specifications of the two vertical bevel gears are the same, the axes of the two vertical bevel gears are coincident with the axis of the vertical shaft, the upper bevel gear in the two vertical bevel gears faces downwards, and the lower bevel gear faces upwards; the inner end of the wheel shaft is provided with a horizontal bevel gear, the axis of the horizontal bevel gear is coincident with the axis of the wheel shaft, and the horizontal bevel gear is positioned between two vertical bevel gears and can be meshed with one vertical bevel gear; the gear cylinder is provided with a cylinder, the cylinder is sleeved outside a certain section of the gear cylinder, and flanges are respectively arranged at the positions, located at the two ends of the cylinder, of the gear cylinder; a water tank is arranged in the inner side direction of each vertical shaft and is fixed on the machine body, a floater is arranged in the water tank, the upper end of the floater extends out of the water tank, water or other liquid is contained in the water tank, the floater floats by the buoyancy of the water, and the water tanks are communicated with each other through water pipes; a gear rod group is arranged between the water tank and the vertical shaft, the gear rod group comprises a vertical gear rod and two gears, a sliding rail and a sliding groove structure which are matched with each other are arranged between the machine body and the gear rod, and the gear rod is limited to move only in the vertical direction through the sliding rail and sliding groove structure; the fixed block and the cylinder are respectively and fixedly provided with a first rack and a second rack, and a sliding rail and a sliding chute which are matched with each other are arranged between the first rack and the second rack; the machine body and the floater are respectively provided with a third rack and a fourth rack, wherein the first rack and the second rack are positioned on the outer side of the gear rod, the third rack and the fourth rack are positioned on the inner side of the gear rod, the first rack and the third rack are respectively meshed with the first gear, and the second rack and the fourth rack are respectively meshed with the second gear; a flange is arranged on the vertical shaft and below the gear drum, a seventh spring is arranged between the flange and the gear drum, and the seventh spring is sleeved on the vertical shaft; a vertical hole is formed in the position, located at the lower end of the vertical shaft, of the machine body, and the lower end of the vertical shaft is located in the vertical hole; the two hand-pulling towing rods and the two support legs are respectively positioned at two sides of the rear end of the vehicle body; the two hand-pulling towing rods and the two supporting legs are fixedly connected through a cross rod respectively, so that the two hand-pulling towing rods and the two supporting legs can move synchronously; the front end of the hand-pulling towing rod is hinged with the vehicle body, and a position above the hand-pulling towing rod on the vehicle body is provided with a limiting structure which can limit the hand-pulling towing rod to be lifted to a horizontal state only; the middle or the upper position of the middle of the supporting leg is hinged with the vehicle body, and the upper end of the supporting leg is propped against the hand-pulling towing rod; a protruding structure is arranged on the hand-pulling towing rod and positioned on the front side of the upper end of the supporting leg; the upper ends of the supporting legs are connected with the positions of the vehicle body below the supporting legs through five springs, and the positions of the hand-pulling towing rod and the position of the vehicle body below the hand-pulling towing rod are connected through six springs.