CN219526159U - Electric carrier - Google Patents

Abstract

The utility model relates to an electric carrier, which is characterized in that a driving wheel works under high wheel pressure for a long time in the process of carrying heavy objects, the driving wheel is easy to wear, the loads separated by universal balance wheels on the left side and the right side of the driving wheel under no-load conditions are less, the whole carrier is easy to shake in the no-load running process, the driving comfort is poor, or the driving assembly slips due to insufficient wheel pressure under heavy load conditions. Because the main variable of the weight of the carrier is the weight of the goods carried by the carrier, the load of the carrier can be clearly obtained by increasing or decreasing the wheel pressure of the driving wheel, and a stressed piece capable of detecting the load of the fork is arranged on the lifting frame; meanwhile, the driving wheel is subjected to wheel pressure increasing or reducing, and the driving wheel rotates continuously and cannot be directly subjected to load pressure, so that the force application part is arranged on the driving seat, and the driving wheel is ballasted through the ballasting driving seat.

Description

Electric carrier

Technical Field

The utility model relates to the technical field of a carrier, in particular to an electric carrier.

Background

In the prior art, the batteries used for the pedal type carrier are maintenance-free storage batteries or lead-acid storage batteries, the service life is short, the size is large, the weight is heavy, the energy density is low, the charging time is long, the lead-acid storage batteries also need to be manually maintained in the use process, the storage battery liquid is added regularly, and the materials used for the storage batteries pollute the environment.

The existing pedal type carrier driving assembly mounting mode is of a fixed structure, driving is unstable, slipping is easy, some pedal type carrier driving assembly mounting structures are of four-bar structures, pin shafts of the structural mode are easy to wear, the failure rate is high, no booster cylinder exists, in the use process, driving wheels work under high wheel pressure for a long time, the driving wheels are easy to wear, the loads of balance wheels on the left side and the right side are less under the no-load condition, the whole vehicle is easy to sway during no-load driving, driving comfort is poor, or slipping is caused by insufficient wheel pressure of the driving assembly under the heavy load condition.

Disclosure of Invention

In order to solve the problems, the utility model aims to solve the problems that the whole vehicle is easy to shake, the driving comfort is poor or the driving assembly slips due to insufficient wheel pressure under heavy load in the idle running process of the existing pedal type carrier.

In order to solve the problems, the utility model adopts the following technical scheme: an electric carrier comprises a lifting frame and a frame main body, wherein a fork and a lithium battery box for placing a lithium battery are arranged on the lifting frame, and a load wheel assembly for bearing the frame main body is arranged at the bottom of the frame main body; the load wheel assembly comprises a driving wheel and universal balance wheels positioned at two sides of the driving wheel, the universal balance wheels are fixed on a bottom plate of the frame main body, the driving wheel is mounted on a driving seat, and the driving wheel is movably mounted on the frame main body through the driving seat; the frame main body is provided with a stress piece and a force application piece, the stress piece can bear the ballast of the goods loaded on the lifting frame, and the force application piece can provide corresponding load pressure for the driving wheel according to the condition that the stress piece bears the ballast. The existing carrier is in the in-process of carrying the heavy object, the drive wheel works under the high wheel pressure for a long time, the drive wheel is easy to wear, and the load that the balance wheel on the left side and the right side is divided into under the no-load condition is less, and in the no-load driving process, the whole carrier is easy to shake, and the driving comfort is poor, or under the heavy load condition, the wheel pressure of the drive assembly is insufficient and the drive assembly slips. It is necessary to add some pressure to the drive wheel depending on the weight of the load being handled. The frame body is provided with the stress piece and the force application piece, and the force application piece can provide corresponding load pressure for the driving wheel according to the condition that the stress piece bears ballast.

Further, the stress part is a lifting oil cylinder arranged on the frame main body and used for jacking the lifting frame, the force application part is a pressurizing oil cylinder arranged on the frame main body, the pressurizing oil cylinder and the lifting oil cylinder are mutually communicated through a pipeline, and a ballast spring capable of downwards propping against the driving seat is sleeved at the extending end of the pressurizing oil cylinder. In order to avoid that the wheel pressure of the driving wheel is always large and the driving wheel is worn out in an accelerating way, so that running is not stable, and also in order to avoid that the load is small, the wheel pressure is small and skidding. The ballast spring capable of downwards propping against the driving seat is arranged at the extending end below the booster cylinder, and the reason that the driving seat can be propped against by the spring is that: the pressure of the spring to the driving seat is the deformation distance of the spring, and when the extension shaft of the booster cylinder is completely ejected, the load pressure of the spring to the driving seat is maximum, so that the damage of the driving plate caused by the overlarge pressure of the booster cylinder can be prevented.

Further, a four-way electromagnetic valve is arranged between the lifting oil cylinder and the pressurizing oil cylinder, and the four-way electromagnetic valve is connected with a vehicle control system; the four-way solenoid valve is provided with an interface which is respectively provided with a connecting oil way up, down, left and right; the upper interface is communicated with the hydraulic station through a hydraulic hose, the left interface is communicated with the left lifting oil cylinder through a hard pipe, the right interface is communicated with the right lifting oil cylinder through a hard pipe, and the lower interface is communicated with the pressurizing oil cylinder. In the scheme, when the lifting frame is lifted, the electromagnetic valve is opened, hydraulic oil in the hydraulic station respectively enters the two lifting cylinders and the pressurizing cylinder, so that the lifting cylinders lift the lifting frame, and the pressure shaft at the lower end of the pressurizing cylinder is lifted downwards; when the lifting frame descends, the electromagnetic valve is opened, and hydraulic oil in the two lifting oil cylinders and the pressurizing oil cylinder respectively enter the hydraulic station. When the cargo is lifted, hydraulic oil in the two lifting oil cylinders and the pressurizing oil cylinder are mutually communicated, the pressure intensity of the hydraulic oil at each position is constant, when the cargo is heavy, the pressure in the oil way is high, and when the cargo is light, the pressure in the oil way is low. And the load pressure of the booster cylinder on the drive is equal to the cross-sectional area of the booster cylinder multiplied by the pressure in the oil path.

Further, a lifting cylinder top plate is arranged on the lifting frame, a fixing hole is arranged on the lifting cylinder top plate, and a column head arranged at the top end of the lifting cylinder can be inserted into the fixing hole; the frame main body is provided with an oil cylinder seat for installing a lifting oil cylinder, the bottom end of the lifting oil cylinder is provided with a hemispherical convex base, and a hemispherical concave cushion block which can be matched with the hemispherical convex base is arranged in the oil cylinder seat; the hemispherical convex base is provided with a limit groove, and the limit screw can pass through a threaded hole on the side wall of the oil cylinder base and is inserted into the limit groove on the hemispherical convex base. In the scheme, in order to ensure the matching of the lifting oil cylinder and the lifting oil cylinder seat, a hemispherical convex base is arranged at the bottom end of the lifting oil cylinder, and a hemispherical concave cushion block is arranged on the lifting oil cylinder seat, so that the installation error between the lifting oil cylinder and the lifting oil cylinder seat can be compensated; and the side wall of the lifting oil cylinder seat is provided with a limit groove, and after the hemispherical convex base of the lifting oil cylinder is inserted, the hemispherical convex base is provided with a limit groove, and a limit screw can pass through a threaded hole on the side wall of the lifting oil cylinder seat and is inserted into the limit groove on the hemispherical convex base.

Further, a mounting bracket for mounting the booster cylinder is arranged on the frame main body, a mounting part for mounting the booster cylinder is arranged on the mounting bracket, the mounting part is positioned right above the driving seat, and the booster cylinder is vertically arranged. In order to ensure that the ejection direction of the ejection shaft for supercharging acts on the driving seat vertically downwards, the mounting bracket of the supercharging oil cylinder is arranged on the frame main body in the scheme, and the mounting position for mounting the supercharging oil cylinder is positioned right above the driving seat, so that the supercharging oil cylinder is kept vertically downwards under the action of gravity.

Further, the stress piece is a detection device arranged on the lifting frame, and the detection device can detect the weight of the goods loaded on the lifting frame and transmit information to the central control system; the force application part is a ballast device arranged on the frame main body and can load pressure on the driving wheel according to data transmitted by the central control system. In addition to the lifting cylinder to booster cylinder mode, the detection device and the ballast device can provide proper load pressure for the load wheel. Because the main variable of the weight of the carrier is the weight of the goods carried by the carrier, the load of the carrier can be clearly obtained by increasing or decreasing the wheel pressure of the driving wheel through the central control system, and the lifting frame is provided with a detection device capable of detecting the load of the fork; meanwhile, the driving wheel is subjected to wheel pressure increasing or reducing, and the driving wheel rotates continuously and cannot be directly subjected to load pressure, so that a ballast device which can act on the driving seat is arranged, and the driving wheel is ballasted through the ballast driving seat.

Further, a driving seat mounting block is fixedly arranged on the frame main body, a first mounting opening is correspondingly formed in the side face of the driving seat, the driving seat mounting block can be inserted into the first mounting opening, and the driving seat mounting block can move relative to the driving seat mounting block; the driving seat mounting block is provided with a limiting guide rod, and the side wall of the first mounting opening is provided with a guide hole for the limiting guide rod to move up and down, so that the driving seat can move up and down along the limiting guide rod; the free end of the limiting guide rod on the upper side of the limiting seat mounting block is provided with a locknut, the limiting guide rod is sleeved with a driving pressure spring, the upper end of the driving pressure spring is propped against the locknut positioned at the upper end of the limiting guide rod, and the lower end of the driving pressure spring is propped against the edge of the guide hole on the driving seat. When the ground of the driving wheel is higher than the ground of the left and right universal balance wheels on two sides, the driving seat slides upwards along the limiting guide rod, so that the rear end of the driving wheel is prevented from being lifted to shake; when the ground of the driving wheel is lower than the ground of the universal balance wheel, the driving seat slides downwards along the limiting guide rod, so that the phenomenon that the driving wheel is overhead by the universal balance wheels at the left side and the right side and the wheel frame is reduced to slip is avoided.

Further, the driving seat is provided with a middle mounting port for mounting the driving assembly and a second mounting port for mounting the steering motor; the driving assembly comprises a steering bearing, a first steering gear and a driving wheel; the steering motor comprises a steering motor main body and a second steering gear positioned at the output end of the steering motor; the second steering gear can be meshed with the first steering gear, so that the steering gear can drive the driving assembly to rotate around the steering bearing. The driving seat in the scheme controls the steering motor through the vehicle control system, so that the second steering gear at the lower end of the steering motor rotates, the second steering gear is meshed with the first steering gear, the first steering gear is driven to rotate, the driving wheel in the driving assembly and the first steering gear are relatively fixed, and the rotating bearing is arranged in the middle of the first steering gear, so that the steering motor controls the driving assembly to rotate by taking the steering bearing as the axle center.

Further, the frame main body is provided with an arm guard, and the arm guard comprises a mounting seat, a mounting cover plate and an arm guard bent pipe which are fixed on the frame main body; the mounting seat and the mounting cover plate are provided with semicircular structures, and the middle part of the arm protection bent pipe can penetrate through a fixing hole formed by the cooperation of the mounting seat and the mounting cover plate; a limiting rotor is arranged between the two groups of limiting seats, and a limiting ring is arranged on the arm protection bent pipe, so that the limiting rotor can limit the rotation of the limiting ring, and the arm protection bent pipe is locked when rotating to a horizontal position. The frame main part rear end in this scheme is equipped with footboard and control handle, when the operator drives the carrier and turns, because huge steering effort, the operator probably can produce the trend that the health was thrown to one side, in order to protect the safety of operator when using control handle on the footboard, is equipped with the armguard at frame main part rear end, can produce the health to throw to one side at the operator and provide support for the operator health, prevents the emergence accident.

Further, the mounting seat is provided with a mounting hole for mounting the limiting rotor, two ends of the limiting rotor are provided with limiting rotor mounting posts which can be inserted into the mounting hole, and the limiting rotor is provided with a first clamping groove and a second clamping groove in a surrounding manner; the limiting ring is provided with a first limiting bulge, a second limiting bulge and a poking head, and when the arm guard rotates, the poking head can poke the limiting rotor to rotate; when the first limiting protrusion is embedded into the second clamping groove, the protective arm is changed from a retracted state to an opened state; when the second limiting protrusion is embedded into the second clamping groove, the armrests are changed from an open state to a retracted state.

According to the technical scheme, the stress piece and the force application piece are arranged on the frame main body, the stress piece can bear the ballast of the goods loaded on the lifting frame, and the force application piece can provide corresponding load pressure for the driving wheel according to the condition that the stress piece bears the ballast, so that the driving wheel is prevented from being worn out due to the fact that the wheel pressure of the driving wheel is always large, running shaking is unstable, and the situation that the wheel pressure is small and skidding is avoided when the load is small.

Drawings

Fig. 1 is an overall construction diagram of the present utility model.

FIG. 2 is a schematic diagram of the overall structure of the present utility model.

Fig. 3 is a schematic diagram of the connection of the lifting frame to the frame body.

Fig. 4 is a schematic view of the cylinder arrangement on the frame body.

Fig. 5 is a schematic diagram of the cylinder arrangement on the drive assembly and the frame body.

FIG. 6 is a schematic illustration of a drive assembly mounted on a drive base.

FIG. 7 is a schematic illustration of the drive assembly coupled to a drive wheel.

Fig. 8 is a schematic diagram of the connection of a lifting cylinder to a booster cylinder.

Fig. 9 is a schematic structural view of a lifting cylinder.

Fig. 10 is an explanatory view of the arm rest of the present utility model when put down.

Fig. 11 is an explanatory view of the arm rest of the present utility model when put down.

Fig. 12 is a disassembled view of the arm guard of the present utility model.

Fig. 13 is an explanatory view of the retainer ring of the present utility model.

Fig. 14 is an explanatory view of a limit rotor of the present utility model.

Fig. 15 is an explanatory view of a sectional view of a spacing rotor of the present utility model.

Fig. 16 is a diagram showing the cooperation of the stop collar and the stop rotor when the arm guard of the present utility model is lowered.

Fig. 17 is a diagram showing the cooperation of the stop collar and the stop rotor when the arm guard is put down.

In the figure: the lifting frame 1, the frame main body 2, the lithium battery box 7, the driving wheel 31, the universal balance wheel 32, the driving seat 9, the lifting cylinder 21, the booster cylinder 22, the ballast spring 221, the four-way electromagnetic valve 23, the hydraulic hose, the hydraulic station, the hard tube, the cylinder seat 261, the hemispherical convex base 211, the hemispherical concave cushion 262 limit screw 214, the mounting bracket 27, the driving seat 9, the driving seat mounting block 271, the first mounting port 91, the limit guide rod 272, the guide hole 92, the locknut 273, the driving pressure spring 274, the middle mounting port 93, the mounting steering motor 33 and the second mounting port 94; the driving assembly 34, the steering bearing, the first steering gear 341, the driving wheel 31, the second steering gear 331, the first steering gear 341, the arm guard 6, the mounting seat 62, the mounting cover plate 64, the arm guard bent pipe 61, the mounting hole 621, the limit rotor 65, the limit rotor mounting column 654, the first clamping groove 651 and the second clamping groove 653; stop collar 66, first stop tab 662, second stop tab 663, and stop collar 661.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and can be, for example, fixedly connected, detachably connected, or integrally connected; can be a mechanical connection or an electrical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

1-14, an electric carrier comprises a lifting frame 1 and a frame main body 2, wherein a fork and a lithium battery box 7 for placing a lithium battery are arranged on the lifting frame 1, and a load wheel assembly for bearing the frame main body 2 is arranged at the bottom of the frame main body 2; the load wheel assembly comprises a driving wheel 31 and universal balance wheels 32 positioned at two sides of the driving wheel 31, the universal balance wheels 32 are fixed on the bottom plate of the frame main body 2, the driving wheel 31 is arranged on the driving seat 9, and the driving wheel 31 is movably arranged on the frame main body 2 through the driving seat 9; the frame body 2 is provided with a force-receiving member and a force-applying member, the force-receiving member can bear the ballast of the goods loaded on the lifting frame 1, and the force-applying member can provide corresponding load pressure for the driving wheel 31 according to the condition that the force-receiving member bears the ballast. The existing carrier is in the process of carrying heavy objects, the driving wheel 31 works under high wheel pressure for a long time, the driving wheel 31 is easy to wear, the loads separated by the balance wheels on the left side and the right side under the no-load condition are less, the whole carrier is easy to shake in the no-load running process, the driving comfort is poor, or the driving assembly 34 is not enough in wheel pressure and slides under the heavy load condition. It is necessary to add some pressure to the drive wheel 31 depending on the weight of the load being handled. The frame body 2 is provided with a force receiving member and a force applying member, and the force applying member can provide corresponding load pressure for the driving wheel 31 according to the situation that the force receiving member receives ballast.

As shown in fig. 1 to 10, the stress element is a lifting cylinder 21 arranged on the frame body 2 and used for lifting the lifting frame 1, the force application element is a booster cylinder 22 arranged on the frame body 2, the booster cylinder 22 and the lifting cylinder 21 are mutually communicated through a pipeline, and a ballast spring 221 capable of downwards propping against the driving seat 9 is sleeved at the extending end of the booster cylinder 22. In order to avoid that the wheel pressure of the driving wheel 31 is always large and the driving wheel 31 is worn out in an accelerating way, so that running is unstable, and also in order to avoid that the wheel pressure is small and skidding when the load is small, the scheme is that the booster cylinder 22 is arranged on the frame main body 2 and the lifting cylinder 21 is communicated with the oil way of the booster cylinder 22, when the goods are lifted, the internal pressure of the lifting cylinder 21 is increased along with the increase of the weight of the goods, so that the pressure of the booster cylinder 22 to the driving wheel 31 is also increased along with the increase of the weight of the goods, when the goods are heavy, the wheel pressure of the driving wheel 31 is large, and when the goods are light, the wheel pressure of the driving wheel 31 is small. The reason why the ballast spring 221 capable of pushing the driving seat 9 downward is arranged at the extending end below the booster cylinder 22 and the spring is used for pushing the driving seat 9 is as follows: the pressure of the spring to the driving seat 9 is the deformation distance of the spring, and when the extension shaft of the booster cylinder 22 is completely ejected, the load pressure of the spring to the driving seat 9 is maximum, so that the damage of the driving plate caused by the overlarge pressure of the booster cylinder 22 can be prevented. A four-way electromagnetic valve 23 is arranged between the lifting oil cylinder 21 and the booster oil cylinder 22, and the four-way electromagnetic valve 23 is connected with a vehicle control system; the four-way solenoid valve 23 is provided with interfaces which are respectively provided with a connecting oil way up, down, left and right; the upper interface is communicated with a hydraulic station through a hydraulic hose, the left interface is communicated with a left lifting oil cylinder 21 through a hard pipe, the right interface is communicated with a right lifting oil cylinder 21 through a hard pipe, and the lower interface is communicated with a pressurizing oil cylinder 22. In the scheme, when the lifting frame 1 is lifted, the electromagnetic valve is opened, hydraulic oil in the hydraulic station respectively enters the two lifting oil cylinders 21 and the pressurizing oil cylinder 22, so that the lifting oil cylinder 21 lifts the lifting frame 1, and the pressure shaft at the lower end of the pressurizing oil cylinder 22 is lifted downwards; when the lifting frame 1 descends, the electromagnetic valve is opened, and hydraulic oil in the two lifting oil cylinders 21 and the pressurizing oil cylinder 22 respectively enter the hydraulic station. When the cargo is lifted, the hydraulic oil in the two lifting oil cylinders 21 and the pressurizing oil cylinder 22 are mutually communicated, the pressure intensity of the hydraulic oil at each position is constant, when the cargo is heavy, the pressure in the oil way is strong, and when the cargo is light, the pressure in the oil way is small. And the load pressure of the booster cylinder 22 on the drive is equal to the cross-sectional area of the booster cylinder 22 multiplied by the pressure in the oil passage. The lifting frame 1 is provided with a lifting oil cylinder 21 top plate, the lifting oil cylinder 21 top plate is provided with a fixed hole, and a column head arranged at the top end of the lifting oil cylinder 21 can be inserted into the fixed hole; the frame main body 2 is provided with an oil cylinder seat 261 for installing a lifting oil cylinder 21, the bottom end of the lifting oil cylinder 21 is provided with a hemispherical convex base 211, and a hemispherical concave cushion block 262 which can be matched with the hemispherical convex base 211 is arranged in the oil cylinder seat 261; the hemispherical convex base 211 is provided with a limit groove, and the limit screw 214 can pass through a threaded hole on the side wall of the cylinder seat 261 and is inserted into the limit groove on the hemispherical convex base 211. In the scheme, in order to ensure the matching of the lifting oil cylinder 21 and the lifting oil cylinder 21 seat, a hemispherical convex base 211 is arranged at the bottom end of the lifting oil cylinder 21, and a hemispherical concave cushion block is arranged on the lifting oil cylinder 21 seat, so that the installation error between the lifting oil cylinder 21 and the lifting oil cylinder 21 seat is compensated; and a limit groove is formed in the side wall of the lifting cylinder 21 seat, after the hemispherical convex base 211 of the lifting cylinder 21 is inserted, the hemispherical convex base 211 is provided with the limit groove, and the limit screw 214 can pass through a threaded hole in the side wall of the lifting cylinder 21 seat and be inserted into the limit groove in the hemispherical convex base 211. The frame main body 2 is provided with a mounting bracket 27 for mounting the booster cylinder 22, the mounting bracket 27 is provided with a mounting part for mounting the booster cylinder 22, the mounting part is positioned right above the driving seat 9, and the booster cylinder 22 is vertically arranged. In order to ensure that the ejection direction of the ejection shaft of the supercharging is vertically downward acting on the driving seat 9, in this embodiment, a mounting bracket 27 of the supercharging cylinder 22 is provided on the frame body 2, and the mounting position for mounting the supercharging cylinder 22 is located directly above the driving seat 9, so that the supercharging cylinder 22 is kept vertically downward by the action of gravity.

In addition to lifting the cylinders 21 to 22, the appropriate load pressure can be provided to the load wheel by the detection device and the ballast device in this solution. The stress piece is a detection device arranged on the lifting frame 1, and the detection device can detect the weight of the goods loaded on the lifting frame 1 and transmit information to the central control system; the urging member is a ballast device provided on the frame body 2, and is capable of applying pressure to the drive wheel 31 based on data transmitted from the central control system. Since the main variable of the weight of the truck is the weight of the goods carried by the truck, the load of the truck is clear by increasing or decreasing the wheel pressure to the driving wheel 31 through the central control system, and therefore the lifting frame 1 is provided with a detection device capable of detecting the load of the fork; at the same time, the driving wheel 31 is subjected to wheel pressure increasing or reducing, and since the driving wheel 31 is continuously rotated and cannot be directly subjected to load pressure, a ballast device capable of acting on the driving seat 9 is provided, and the driving wheel 31 is ballasted by the ballast driving seat 9.

As shown in fig. 10, a driving seat mounting block 271 is fixedly arranged on the frame main body 2, a first mounting opening 91 is correspondingly arranged on the side surface of the driving seat 9, the driving seat mounting block 271 can be inserted into the first mounting opening 91, and the driving seat mounting block 271 can move relative to the driving seat mounting block 271; the driving seat mounting block 271 is provided with a limit guide rod 272, and the side wall of the first mounting opening 91 is provided with a guide hole 92 for the limit guide rod 272 to move up and down, so that the driving seat 9 can move up and down along the limit guide rod 272; the free end of the limit guide rod 272 on the upper side of the limit seat mounting block is provided with a locknut 273, the limit guide rod 272 is sleeved with a driving pressure spring 274, the upper end of the driving pressure spring 274 is propped against the locknut 273 positioned on the upper end of the limit guide rod 272, and the lower end of the driving pressure spring 274 is propped against the edge of the guide hole 92 on the driving seat 9. When the ground on which the driving wheel 31 is positioned is higher than the ground on which the left and right universal balance wheels 32 on both sides are positioned, the driving seat 9 slides upwards along the limit guide rod 272, so that the rear end of the driving wheel 31 is prevented from being lifted to shake; when the ground on which the driving wheel 31 is positioned is lower than the ground on which the universal balance wheel 32 is positioned, the driving seat 9 slides downwards along the limit guide rod 272, so that the phenomenon that the driving wheel 31 is overhead by the universal balance wheels 32 on the left side and the right side and the wheel frame reduces slipping is avoided.

As shown in fig. 10, the driving seat 9 is provided with a middle mounting opening 93 for mounting the driving assembly 34 and a second mounting opening for mounting the steering motor 33; the drive assembly 34 includes a steering bearing, a first steering gear 341 and a drive wheel 31; the steering motor 33 includes a steering motor 33 main body and a second steering gear 331 at an output end of the steering motor 33; the second steering gear 331 is capable of meshing with the first steering gear 341, so that the steering motor 33 can rotate around the steering bearing with the driving assembly 34. The driving seat 9 in this solution controls the steering motor 33 through the vehicle control system, so that the second steering gear 331 at the lower end of the steering motor rotates, the second steering gear 331 is meshed with the first steering gear 341, so as to drive the first steering gear 341 to rotate, the driving wheel 31 in the driving assembly 34 and the first steering gear 341 are relatively fixed, and the rotating bearing is disposed in the middle of the first steering gear 341, so that the steering motor 33 controls the driving assembly 34 to rotate with the steering bearing as an axis.

As shown in fig. 10 to 12, the frame body 2 is provided with a guard arm 66, and the guard arm 66 includes a mount 62 fixed to the frame body 2, a mount cover 64, and a guard arm bent pipe 61; the mounting seat 62 and the mounting cover plate 64 are provided with semicircular structures, and the middle part of the arm protection bent pipe 61 can pass through a fixing hole formed by the cooperation of the mounting seat 62 and the mounting cover plate 64; a limiting rotor 65 is arranged between the two groups of limiting seats, and a limiting ring is arranged on the arm protecting bent pipe 61, and the limiting rotor 65 can limit the rotation of the limiting ring, so that the arm protecting bent pipe 61 is locked when rotating to a horizontal position. The rear end of the frame main body 2 in the scheme is provided with a pedal and an operating handle, when an operator drives the carrier to turn, the operator possibly generates a trend of body throwing to one side due to huge steering force, and in order to protect the safety of the operator when the operating handle is used on the pedal, the rear end of the frame main body 2 is provided with a protective arm 66, and the operator possibly generates a trend of body throwing to one side to provide support for the body of the operator, so that accidents are prevented.

As shown in fig. 12 to 17, the mounting base 62 is provided with a mounting hole 621 for mounting the limit rotor 65, both ends of the limit rotor 65 are provided with limit rotor mounting posts 654 which can be inserted into the mounting hole 621, and the limit rotor 65 is provided with a first clamping groove 651 and a second clamping groove 653 in a surrounding manner; the limiting ring is provided with a first limiting protrusion 662, a second limiting protrusion 663 and a poking head 661, and when the arm protection 6 rotates, the poking head 661 can poke the limiting rotor 65 to rotate; when the first limit projection 662 is fitted into the second click groove 653, the arm guard 6 is changed from the retracted state to the open state; when the second limiting projection 663 is inserted into the second clamping groove 653, the arm guard 6 changes from the open state to the retracted state.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.

Claims (8)

1. An electric carrier, its characterized in that: the trolley comprises a lifting frame (1) and a trolley frame main body (2), wherein a fork and a lithium battery box (7) for placing a lithium battery are arranged on the lifting frame (1); the bottom of the frame main body (2) is provided with a load wheel assembly for bearing the frame main body (2), the load wheel assembly comprises a driving wheel (31) and universal balance wheels (32) positioned at two sides, the universal balance wheels are arranged on a bottom plate of the frame main body (2), and the driving wheel (31) is arranged on a driving seat (9); the frame main body (2) is provided with a stress piece and a force application piece, the stress piece can bear the ballast of the goods loaded on the lifting frame (1), and the force application piece can provide corresponding load pressure for the driving wheel (31) according to the condition that the stress piece bears the ballast.

2. The electric carrier of claim 1, wherein the force-bearing member is a lifting cylinder (21) arranged on the frame body (2) and used for lifting the lifting frame (1), the force-applying member is a pressurizing cylinder (22) arranged on the frame body (2), the pressurizing cylinder (22) and the lifting cylinder (21) are communicated with each other through a pipeline, and a ballast spring (221) capable of downwards propping against the driving seat (9) is sleeved at the extending end of the pressurizing cylinder (22).

3. An electric truck according to claim 2, characterized in that a four-way electromagnetic valve (23) is arranged between the lifting oil cylinder (21) and the pressurizing oil cylinder (22), and the four-way electromagnetic valve is connected with a vehicle control system; the four-way solenoid valve is respectively provided with an interface for connecting oil paths; the upper interface is communicated with the hydraulic station through a hydraulic hose, the left interface is communicated with a lifting oil cylinder (21) on the left side through a hard pipe, the right interface is communicated with a lifting oil cylinder (21) on the right side through the right side of the hard pipe, and the lower interface is communicated with a pressurizing oil cylinder (22).

4. An electric truck according to claim 3, characterized in that: the frame main body (2) is provided with an oil cylinder seat (261) for installing a lifting oil cylinder (21), the bottom end of the lifting oil cylinder (21) is provided with a hemispherical convex surface base (211), and a hemispherical concave surface cushion block (262) which can be matched with the hemispherical convex surface base (211) is arranged in the oil cylinder seat (261); the hemispherical convex base (211) is provided with a limit groove, and the limit screw (214) can pass through a threaded hole on the side wall of the oil cylinder base (261) and is inserted into the limit groove on the hemispherical convex base (211).

5. An electric truck according to claim 3, characterized in that: the frame main body (2) is provided with a mounting bracket (27) for mounting the booster cylinder (22), the mounting bracket is provided with a mounting part for mounting the booster cylinder (22), the mounting part is positioned right above the driving seat (9), and the booster cylinder (22) is vertically arranged.

6. The electric carrier of claim 1, wherein a driving seat mounting block (271) for mounting the driving seat (9) is fixedly arranged on the frame main body (2), a first mounting opening (91) is correspondingly arranged on the side surface of the driving seat (9), and the driving seat mounting block (271) can be inserted into the first mounting opening (91) so that the driving seat (9) can move relative to the driving seat mounting block (271); a limiting guide rod (272) is arranged on the mounting block of the driving seat (9), and a guide hole (92) for the limiting guide rod (272) to move up and down is arranged on the side wall of the first mounting hole, so that the driving seat (9) can move up and down along the limiting guide rod; the free end of the limit guide rod on the upper side of the limit seat mounting block is provided with a locknut (273), the limit guide rod is sleeved with a driving pressure spring (274), the upper end of the driving pressure spring (274) is propped against the locknut (273) positioned at the upper end of the limit guide rod, and the lower end of the driving pressure spring (274) is propped against the edge of the guide hole (92) on the driving seat (9).

7. An electric truck as claimed in claim 1, characterized in that: the frame main body (2) is provided with an arm guard (6), and the arm guard comprises a mounting seat (62), a mounting cover plate (64) and an arm guard bent pipe (61) which are fixed on the frame main body (2); the mounting seat and the mounting cover plate are provided with semicircular structures, and the middle part of the arm protection bent pipe (61) can penetrate through a fixing hole formed by the cooperation of the mounting seat and the mounting cover plate; a limiting rotor (65) is arranged between the two groups of limiting seats, a limiting ring (66) is arranged on the arm protection bent pipe (61), and the limiting rotor (65) can limit the rotation of the limiting ring (66) so that the arm protection bent pipe (61) is locked when rotating to a horizontal position.

8. The electric carrier of claim 7, wherein the mounting base is provided with a mounting hole (621) for mounting the limiting rotor, two ends of the limiting rotor are provided with limiting rotor mounting posts (654) which can be inserted into the mounting hole, and the limiting rotor is provided with a first clamping groove (651) and a second clamping groove (653) in a surrounding manner; the limiting ring (66) is provided with a first limiting bulge (662), a second limiting bulge (663) and a poking head (661), and when the arm guard rotates, the poking head can poke the limiting rotor to rotate; when the first limiting protrusion is embedded into the second clamping groove, the protective arm is changed from a retracted state to an opened state; when the second limiting protrusion is embedded into the second clamping groove, the armrests are changed from an open state to a retracted state.