electrically powered vehicle

Abstract

The application discloses an electric ground cart, wherein a middle connecting seat is fixed with one end of a fork, a first hinged mechanism is connected with the middle connecting seat, one end of a first connecting rod is hinged with the first hinged mechanism, the other end of the first connecting rod is hinged with a second hinged mechanism, the other end of the fork is fixed with the second hinged mechanism, a passive walking wheel is installed on the second hinged mechanism, the first hinged mechanism is further hinged with a supporting seat, a lifting driving mechanism is installed on the supporting seat, the lifting driving mechanism is further connected with the middle connecting seat, an operating handle is connected with the supporting seat, a wheel hub motor is connected with the supporting seat, the wheel hub motor is a wheel hub motor with power-off braking, a battery is installed on the middle connecting seat, and the battery is connected with the wheel hub motor. The application has the advantages of quick response and short braking distance during braking.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of goods carrying, in particular to an electric ground vehicle. BACKGROUND

[0002] The ground vehicle, also known as a manual hydraulic carrying vehicle, is a convenient, flexible, heavy-duty and durable goods carrying vehicle. In many process links in the fields of production and manufacturing and warehouse logistics, it can assist human to transfer the position of goods, greatly saving manpower and reducing the time-consuming of goods position transfer.

[0003] The traditional ground vehicle relies on manpower to pull and walk, so the traditional ground vehicle has the defect of laboriousness. With the development of technology, an electric ground vehicle has appeared, which has the structure that the driving shaft at the bottom of the ground vehicle is fixedly connected with driving wheels at both ends, the surface of one driving wheel is fixedly connected with a brake ring, the surface of the brake ring is fixedly connected with a plurality of brake blocks distributed in a circle, the side of the ground vehicle is fixedly connected with an adjusting plate, the top of the adjusting plate is provided with a brake lever through an adjusting mechanism, the bottom of the brake lever is fixedly connected with an arc-shaped lifting plate, and the inner side of the lifting plate is provided with a clamping block through a buffer mechanism. The electric ground vehicle is driven to walk by a motor.

[0004] The ground vehicle with the above structure adopts electric drive, saves manpower traction, and is provided with a brake ring and brake blocks. However, when the moving ground vehicle needs to be stopped, the adjusting mechanism on the adjusting plate is used to make the brake lever rise, the rising of the brake lever makes the lifting plate rise, thereby driving the clamping block to rise into the space between the two adjacent brake blocks, the two brake blocks drive the clamping block to move inside the lifting plate, the force borne by the brake blocks is increased through the buffer mechanism, the rotating speed of the brake ring is reduced, until the clamping block is blocked by one end of the lifting plate and cannot move, thereby making the brake ring stop rotating, the brake ring stops rotating to make the driving wheels stop synchronously, and the ground vehicle stops without power.

[0005] For the ground vehicle with the above structure, during braking, multiple mechanical actions are involved to stop the ground vehicle, so the ground vehicle with this structure has the defect of slow response during braking. If the ground vehicle carries heavy goods, the ground vehicle has great inertia during walking, resulting in long braking distance. SUMMARY

[0006] The purpose of the present application is to provide an electric ground vehicle with rapid response and short braking distance during braking.

[0007] The technical solution for realizing the above purpose is as follows:

[0008] The electric ground bull comprises a fork, a middle connecting seat, a first hinged mechanism, a first connecting rod, a second hinged mechanism, a passive walking wheel, a supporting seat, a lifting driving mechanism, an operating handle, a wheel hub motor, a battery, the middle connecting seat is fixed with one end of the fork, the first hinged mechanism is connected with the middle connecting seat, the first hinged mechanism is hinged with one end of the first connecting rod, the other end of the first connecting rod is hinged with the second hinged mechanism, the other end of the fork is fixed with the second hinged mechanism, the passive walking wheel is installed on the second hinged mechanism, the first hinged mechanism is further hinged with the supporting seat, the lifting driving mechanism is installed on the supporting seat, the lifting driving mechanism is further connected with the middle connecting seat, the operating handle is connected with the supporting seat, the wheel hub motor is connected with the supporting seat, the wheel hub motor is a wheel hub motor of power-off braking, the battery is installed on the middle connecting seat, and the battery is connected with the wheel hub motor.

[0009] In the application, since the wheel hub motor is a wheel hub motor of power-off braking, when the wheel hub motor is started in use, the wheel hub motor is in the state of obtaining power, at this time, the wheel hub motor will not brake, when braking is needed, the power supply to the wheel hub motor is cut off, and the wheel hub motor will brake immediately after losing power, so that the state of braking is formed. Therefore, the electric ground bull vehicle of the application has the advantages of quick response and short braking distance in the braking process. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a perspective view of the electric ground bull of the application.

[0011] Figure 2 It is a perspective view of the electric ground bull of the application in another direction.

[0012] Figure 3 It is a schematic view of hiding a part of parts on the basis of Figure 2

[0013] Figure 4 It is a perspective view of the operating handle.

[0014] Figure 5 It is an enlarged view of P part in Figure 4

[0015] Figure 6 It is an external structure schematic view of the wheel hub motor in the application.

[0016] Figure 7 It is a sectional structure view of the wheel hub motor in the application.

[0017] Figure 8 It is a part structure view of the outer rotor motor.

[0018] Figure 9 It is a perspective view of the electromagnetic brake.

[0019] Figure 10 ​​A sectional view of the electromagnetic brake.

[0020] Figure 11 A combination view of the transmission disc and handle.

[0021] Figure 12 A Figure 11 A schematic view in another direction.

[0022] Fork A, middle connecting seat B, first hinged mechanism C, first connecting rod D, second hinged mechanism E, passive walking wheel F, support seat G, lifting driving mechanism H, operating handle K, wheel hub motor L, battery M, controller N, shaft 1, first shoulder 1a, outer rotor motor 2, polygonal transmission component 2a, shoulder 2b, planetary transmission mechanism 3, second bearing seat 3a, ring gear 3b, outer wheel hub 4, first end cover 4a, second end cover 4b, middle wheel hub 4c, first bearing 4d, second bearing 4e, electromagnetic brake 5, electromagnetic main body 50, first threaded hole 50a, first assembly hole 50b, first through hole 50c, combination groove 50d, moving disc 51, through hole 51a, third through hole 51b, brake disc 52, mounting hole 52a, static disc 53, spring 54, spacer sleeve 55, first fastener 56, first bearing seat 57, guide part 57a, connecting rod 58, second fastener 59, transmission disc 60, annular boss 60a, waist-shaped hole 60b, notch 60c, second through hole 60d, groove 60e, spherical component 61, connecting disc 62, handle 63, handle body 63a, connecting ring 63b, radial protrusion 63c, signal sending component 64, third fastener 65, first shaft 70, L-shaped hinged arm 71, first support 72, second support 73, cavity 74, support rod 75, operating sleeve 76, lifting button 77, lowering button 78, main support 80, auxiliary support 81, wheel hub motor support 83, connecting seat 84, hinged shaft 85, torsional spring 86, connecting shaft 87. DETAILED DESCRIPTION

[0023] As Figures 1 to 5The electric ground vehicle of the present application comprises a fork A, an intermediate connecting seat B, a first hinged mechanism C, a first connecting rod D, a second hinged mechanism E, a passive walking wheel F, a supporting seat G, a lifting driving mechanism H, an operating handle K, a wheel hub motor L, a battery M, the intermediate connecting seat B is fixed with one end of the fork A, the first hinged mechanism C is connected with the intermediate connecting seat B, the first hinged mechanism C is hinged with one end of the first connecting rod D, the other end of the first connecting rod D is hinged with the second hinged mechanism E, the other end of the fork A is fixed with the second hinged mechanism E, the passive walking wheel F is installed on the second hinged mechanism E, the first hinged mechanism C is further hinged with the supporting seat G, the lifting driving mechanism H is installed on the supporting seat G, the lifting driving mechanism H is further connected with the intermediate connecting seat B, the operating handle K is connected with the supporting seat G, the wheel hub motor L is connected with the supporting seat G, the wheel hub motor L is a wheel hub motor with power-off braking, the battery M is installed on the intermediate connecting seat B, and the battery M is connected with the wheel hub motor L.

[0024] The intermediate connecting seat B comprises a first support 72 and a second support 73, one end of the first support 72 is fixed with one end of the fork A, the other end of the first support 72 is fixed with the second support 73, the second support 73 is connected with the lifting driving mechanism H, a cavity 74 is arranged on the first support 72, the battery M is located in the cavity 74, and a part of the first hinged mechanism C is located in the cavity 74.

[0025] The first hinged mechanism C comprises a first shaft 70 and an L-shaped hinged arm 71, the first shaft 70 is fixed with the intermediate connecting seat B, a middle part of the first shaft 70 is located in the cavity 74, and two ends of the first shaft 70 are fixed with the first support 72, a part of the L-shaped hinged arm 71 is located in the cavity 74, the L-shaped hinged arm 71 is hinged with the first shaft 70, one end of the L-shaped hinged arm 71 is hinged with the first connecting rod D, and the other end of the L-shaped hinged arm 71 is hinged with the supporting seat G.

[0026] The present application further comprises a controller N, which is preferentially arranged in the cavity 74 of the intermediate connecting seat B. The operating handle K comprises a supporting rod 75, an operating sleeve 76, a lifting button 77, a lowering button 78 and a power switch 79, the operating sleeve 76, the lifting button 77, the lowering button 78 and the power switch 79 are respectively installed on the supporting rod 75 and are respectively electrically connected with the controller N, the controller N is electrically connected with the battery M, and the controller N is further electrically connected with the wheel hub motor L and the lifting driving mechanism H.

[0027] The power switch 79 is used to control the power on or off of the wheel motor L. The operation sleeve 76 is rotatably arranged on the support rod 75, and is used to control the forward rotation or reverse rotation of the wheel motor L. For example, when the operation sleeve 76 is rotated forward, the wheel motor L rotates forward to drive the tractor forward. When the operation sleeve 76 is rotated reversely, the wheel motor L rotates reversely to drive the tractor backward. The lifting button 77 is used to control the piston rod of the lifting drive mechanism H to extend, thereby driving the end of the fork A connected with the intermediate connecting seat B to rise. The lowering button 78 is used to control the piston rod of the lifting drive mechanism H to retract, thereby driving the end of the fork A connected with the intermediate connecting seat B to descend. The lifting drive mechanism H preferably adopts an electric hydraulic lifter. It should be noted that the structures of the operation handle K, the lifting drive mechanism H and the controller N all belong to the prior art.

[0028] The support seat G includes a main support 80, a secondary support 81, a wheel motor support 83, a handle support, the main support 80 is hinged with the first hinge mechanism C, the lifting drive mechanism H is fixed on the support 80, the secondary support 81 is sleeved on the lifting drive mechanism H and is fixed with the lifting drive mechanism H, the wheel motor support 83 is fixed with the support seat G, the handle support includes a connecting seat 84, a hinge shaft 85, a torsional spring 86 and a connecting shaft 87, the connecting seat 84 is fixed with the secondary support 81, the hinge shaft 85 is installed on the connecting seat 84, the operation handle K is hinged with the connecting seat 84 through the hinge shaft 85, the torsional spring 86 is sleeved on the hinge shaft 85, one end of the torsional spring 86 cooperates with the operation handle K, the other end of the torsional spring 86 is connected with the connecting shaft 87, and the connecting shaft 87 is connected with the connecting seat 84.

[0029] As Figures 6 to 12 The wheel motor L includes a shaft 1, an outer rotor motor 2, a planetary transmission mechanism 3, an outer wheel hub 4 and an electromagnetic brake 5. The following will be described in detail the relationship between each part and each part:

[0030] The outer rotor motor 2 is used to generate torque, and is arranged on the shaft 1. The planetary transmission mechanism 3 cooperates with the shaft 1, and the outer rotor motor 2 is connected with the planetary transmission mechanism 3. The outer wheel hub 4 is used to receive the torque of the planetary transmission mechanism 3, and can rotate around the shaft 1 under the drive of the planetary transmission mechanism 3. The outer wheel hub 4 surrounds the outer rotor motor 2, and the planetary transmission mechanism 3 cooperates with the outer wheel hub 4.

[0031] The planetary transmission mechanism 3 comprises a sun gear, planet gears, a planet carrier, a ring gear, the sun gear is sleeved on the shaft 1, the sun gear is fixed with the power output end (the outer rotor) of the outer rotor motor 2, the planet gears are multiple (for example, 3), and the planet gears are respectively engaged with the sun gear, the planet gears are also engaged with the ring gear, and the ring gear is fixed with the inner circumferential surface of the outer hub 4. The planet carrier is sleeved on the shaft 1 and is fixed with the shaft 1, the planet carrier is connected with the planet gears through the mandrel, when the outer rotor motor 2 works, the outer rotor motor 2 drives the sun gear in the planetary transmission mechanism 3 to rotate, the sun gear drives the planet gears to rotate, the planet gears are connected with the planet carrier through the mandrel, and the planet carrier does not rotate, when the sun gear drives the planet gears to rotate, the planet gears drive the ring gear to rotate, and the ring gear 3b drives the outer hub 4 to rotate.

[0032] The electromagnetic brake 5 is arranged on the shaft 1 and located in the outer hub 4, the shaft 1 passes through the electromagnetic brake 5, the electromagnetic brake 5 comprises a brake driving mechanism, a static disc 53, a brake disc 52 which is axially movable along the outer rotor motor 2 and rotates with the outer rotor motor 2, the brake disc 52 is fixed with the outer rotor motor 2 in the circumferential direction, and the brake disc 52 is not fixed with the outer rotor motor 2 in the axial direction, so that the brake disc 52 is axially movable along the outer rotor motor 2 and rotates with the outer rotor motor 2, and the parts in the electromagnetic brake 5 and the relationship are described in detail below.

[0033] The brake driving mechanism comprises a movable unit and a fixed unit which generates an electromagnetic force, the fixed unit is fixed with the shaft 1, the movable unit is gap-fitted with the fixed unit and forms reciprocating linear motion when the fixed unit switches between power-off and power-on, the brake disc 52 is located between the movable unit and the static disc 53 and is circumferentially fixed with the outer rotor motor 2, and the static disc 53 is connected with the fixed unit as a whole. One end of the outer rotor motor 2 is provided with a polygonal transmission part 2a, the brake disc 52 is provided with a mounting hole 52a with a polygonal hole wall, and the mounting hole 52a is matched with the polygonal transmission part 2a. In order to bear large force and torque in the braking process, the polygonal transmission part 2a and the polygonal mounting hole 52a are preferably hexagonal. The polygonal transmission part 2a can also adopt a spline or a gear.

[0034] The electromagnetic brake 5 of the application is power-off braking, that is, when the fixed unit is powered, the fixed unit generates a magnetic force to move the movable unit to the fixed unit, and then the brake disc 52 is in a separated state with the static disc and the movable unit, when the fixed unit is power-off, the fixed unit loses the magnetic force, the movable unit moves to the brake disc 52, and the brake disc 52 is pressed between the static disc 52 and the movable unit, since the brake disc 52 is circumferentially fixed with the outer rotor motor 2, when the brake disc 52 is pressed between the static disc and the movable unit, a braking force is generated on the outer rotor motor 2.

[0035] In the application, the fixed unit comprises an electromagnetic body 50, a spacer sleeve 55 and a first fastener 56, the electromagnetic body 50 comprises an electromagnet which generates electromagnetic attraction force to move the movable unit to the electromagnetic body 50 after being powered. The movable unit comprises a moving disc 51 and a spring 54, the moving disc 51 is provided with a through hole 51a, the spacer sleeve 55 passes through the through hole 51a of the moving disc 51 and is in clearance fit with the through hole 51a, and the spacer sleeve 55 guides the moving disc 51 when the moving disc 51 moves between the electromagnetic body 50 and the brake disc 52.

[0036] The two ends of the spacer sleeve 55 are in fit with the electromagnetic body 50 and the static disc 53, preferably, one end of the spacer sleeve 55 abuts against the axial end face of the electromagnetic body 50, and the other end of the spacer sleeve 55 abuts against the static disc 53, the electromagnetic body 50 and the static disc 53 are separated by the spacer sleeve 55, and a containing space for containing the moving disc 51 and the brake disc 52 is formed between the electromagnetic body 50 and the static disc 53.

[0037] The two ends of the spring 54 are in fit with the electromagnetic body 50 and the moving disc 51, the electromagnetic body 50 is provided with a first assembly hole, a part of the spring 54 is located in the first assembly hole 50b, one end of the spring 54 abuts against the hole bottom of the first assembly hole, and the other end of the spring 54 abuts against the moving disc 51, the moving disc 51 compresses the spring 54 when the electromagnetic body 50 generates magnetic attraction force to move the moving disc 51 to the electromagnetic body 50, and the spring 54 accumulates elastic potential energy, the spring 54 stretches and releases the accumulated elastic potential energy when the electromagnetic body 50 loses power and loses magnetic attraction force, the spring 54 pushes the moving disc 51 to move to the brake disc 52, and finally the brake disc 52 is pressed between the moving disc 51 and the static disc 53, and the friction torque is increased due to the friction materials on both sides of the brake disc 52 which increases the friction area.

[0038] The first fastener 56 passes through the static disc 53 and the spacer sleeve 55 and is fastened with the electromagnetic body 50, so that the static disc 53 is connected with the fixed unit as a whole, in the embodiment, the first fastener 56 is a first screw, the electromagnetic body 50 is provided with a first threaded hole 50a, the spacer sleeve 55 corresponds to the first threaded hole 50a after being fit with the electromagnetic body 50, the threaded end of the first screw is in threaded connection with the first threaded hole 50a, the static disc 53 is fit with the head of the first screw, the static disc 53 is provided with a stepped hole, and the head of the first screw is fit with the stepped hole.

[0039] The static disc 53 is connected with the fixing unit as a whole through the first fastener 56, and the first fastener 56 forms a supporting force on the static disc 53, so that the static disc 53 does not need to be supported by the outer rotor motor 2, and the electromagnetic brake 5 can be moved along the axial direction relative to the outer rotor motor 2 without the axial connection between the electromagnetic brake 5 and the outer rotor motor 2, so that the electromagnetic brake 5 is an independent part relative to the outer rotor motor 2, and when any one of the moving disc 51, the brake disc 52 and the static disc 53 cannot continue to be used, the electromagnetic brake 5 can be integrally disassembled alone during the disassembly process, and the electromagnetic brake 5 will not be restricted by the outer rotor motor 2 during the disassembly process, that is, the end cover of the outer rotor motor 2 does not need to be disassembled when the electromagnetic brake 5 is disassembled. Therefore, the structure of the present application has the advantages of saving time and labor, and reducing labor intensity.

[0040] The shoulder part 2b is arranged on the axial end surface of the outer rotor motor 2, and the static disc 53 is in clearance fit with the shoulder part 2b. The shoulder part 2b is located between the polygonal transmission part 2a and the axial end surface of the outer rotor motor 2, and preferably, the shoulder part 2b is integrally formed with the polygonal transmission part 2a and the end cover of the outer rotor motor 2 by casting (the polygonal transmission part 2a and the shoulder part 2b can also be connected by screws or other ways). The outer diameter of the shoulder part 2b is larger than that of the polygonal transmission part 2a, and since the polygonal transmission part 2a and the shoulder part 2b are integrally formed, the shoulder part 2b is beneficial to increase the strength of the polygonal transmission part 2a.

[0041] The shaft 1 is provided with the first shoulder part 1a, which axially positions one end of the fixing unit. The fixing unit further comprises the first bearing seat 57 fixed with the electromagnetic body 50, one end of the electromagnetic body 50 abuts against the first shoulder part 1a, so that the one end of the electromagnetic body 50 is axially positioned by the first shoulder part 1a, and one end of the first bearing seat 57 is fixed with the other end of the electromagnetic body 50, and the outer diameter of the first bearing seat 57 is smaller than that of the electromagnetic body 50.

[0042] The outer hub 4 comprises a first end cover 4a, a second end cover 4b, an intermediate hub 4c, a first bearing 4d and a second bearing 4e, the intermediate hub 4c is located between the first end cover 4a and the second end cover 4b and is fixed with the first end cover 4a and the second end cover 4b, for example, the intermediate hub 4c is fixed with the first end cover 4a and the second end cover 4b by screws, the inner surfaces of the first end cover 4a and the second end cover 4b are both provided with bearing chambers, the first bearing seat 57 and the first bearing 4d are both located in the bearing chamber of the first end cover 4a, the first bearing 4d is sleeved on the first bearing seat 57, and the end of the first bearing 4d or the bearing chamber on the first end cover 4a is axially positioned to the first bearing seat 57, so that the two ends of the fixing unit are axially positioned and the fixing unit is prevented from moving axially, and the second bearing 4e is located in the bearing chamber of the second end cover 4b and cooperates with the planetary transmission mechanism 3.

[0043] When any one of the moving disc 51, the brake disc 52 and the static disc 53 cannot continue to be used and needs to be replaced, the screws for fixedly connecting the first end cover 4a and the intermediate hub 4c are disassembled, the first end cover 4a is removed, the electromagnetic brake 5 is a separate body, one end of the electromagnetic body 50 is axially positioned by the first shoulder 1a, one end of the first bearing seat 57 is fixed with the other end of the electromagnetic body 50, and the electromagnetic body 50 is not axially fixed with the shaft 1, so the electromagnetic brake 5 can be directly disassembled from the shaft 1 as a whole, and it can be seen that the above structure further optimizes the convenience of installation and disassembly of the electromagnetic brake 5.

[0044] One end of the planetary transmission mechanism 3 is provided with a second bearing seat 3a, the second bearing seat 3a is sleeved on the shaft 1, the second bearing seat 3a passes through the bearing chamber of the second end cover 4b and is exposed outside the outer hub 4, and the second bearing 4e cooperates with the second bearing seat 3a.

[0045] The application also comprises a manual rotation control mechanism for combining or separating the moving unit and the brake disc 52, the manual rotation control mechanism comprises a connecting rod 58, a second fastener 59 and a manual rotation assembly, the fixing unit is provided with a first through hole 50c penetrating the electromagnetic body 50 and the first bearing seat 57, the connecting rod 58 is in clearance fit with the first through hole 50c, the second fastener 59 is fixed with one end of the connecting rod 58 after passing through the moving disc 51, the connecting rod 58 can move axially in the first through hole 50c when the connecting rod 58 is subjected to an axial force, the connecting rod 58 drives the moving disc 51 to move axially through the second fastener 59, so that the moving disc 51 is combined or separated with the brake disc 52.

[0046] The second fastener 59 is a screw, one end of the connecting rod 58 is provided with a screw hole, the second fastener 59 is screwed with the screw hole on the connecting rod 58, a third through hole 51b is arranged on the driving disc 51, the third through hole 51b preferably adopts a stepped hole, because the diameters of the two ends of the third through hole 51b are greater than the diameter of the middle part, the second fastener 59 passes through the third through hole 51b on the driving disc 51 and is screwed with the screw hole on the connecting rod 58, so that the driving disc 51 cooperates with the connecting rod 58.

[0047] The connecting rod 58 cooperates with a manual rotating assembly, the manual rotating assembly cooperates with a fixed unit, when the manual rotating assembly rotates, it moves along the fixed unit in the axial direction and drives the driving disc 51 to combine or separate from the brake disc 52 through the connecting rod 58 and the second fastener 59.

[0048] The manual rotating assembly comprises a transmission disc 60, a spherical part 61, a connecting disc 62 and a handle 63, one end of the transmission disc 60 is provided with a recess, the other end of the transmission disc 60 is provided with an annular boss 60a, in the present application, a guide part 57a is further arranged on the first bearing seat 57, the annular boss 60a is in sliding cooperation with the guide part 57a, the outer diameter of the guide part 57a is smaller than the outer diameter of the first bearing seat 57, when the transmission disc 60 and the annular boss 60a move in the axial direction, the guide part 57a can guide the transmission disc 60 and the annular boss 60a.

[0049] The transmission disc 60 is further provided with a waist-shaped hole 60b, a part of the spherical part 61 cooperates with the recess 60e on the transmission disc 60, a combining groove 50d is arranged on the fixed unit, another part of the spherical part 61 combines or separates from the combining groove 50d, the connecting disc 62 is sleeved on the annular boss 60a, the connecting rod 58 is fixed with the connecting disc 62 after passing through the waist-shaped hole 60b, the connecting rod 58 is fixed with the connecting disc 62 through a third fastener 65, the third fastener 65 preferably adopts a screw.

[0050] In the present application, the handle 63 is fixed with the annular boss 60a, a plurality of notches 60c are arranged on the end face of the annular boss 60a, the handle 63 comprises a handle body 63a, a connecting ring 63b and a radial protrusion 63c, the handle body 63a is fixed with the connecting ring 63b, a second through hole 60d is arranged on the annular boss 60a, the connecting ring 63b is located in the second through hole 60d, and the radial protrusion 63c and the handle body 63a are respectively matched with the notches 60c.

[0051] The manual rotating assembly further comprises a signal sending part 64 which sends a signal to the equipment when the radial protrusion 63c on the handle 63 is combined, and the signal sending part 64 is fixed on the connecting disc 62. The signal sending part 64 is a switch, for example, a travel switch. The signal sending part 64 can also be a wireless communication module, for example, a Bluetooth module. The signal sending part 64 can also adopt a Hall switch and the like.

[0052] The present application has the following states:

[0053] First, the brake is removed by power supply: after installing the wheel hub motor on the electric bull, the controller N (which belongs to the prior art) is installed on the electric bull, and when the controller N (the controller controls the wheel hub motor according to the instruction signal sent by the operator, and the controller is not shown in the figure) is powered on, the controller N will output a power-on control signal to the electromagnetic main body 50, so that the electromagnetic main body 50 is powered on, and the electromagnetic main body 50 generates an electromagnetic attraction force to move the moving disc 51 towards the electromagnetic main body 50, thereby separating the moving disc 51 from the brake disc 52. During the movement of the moving disc 51 towards the electromagnetic main body 50, the moving disc 51 compresses the spring 54, so that the spring 54 accumulates elastic potential energy.

[0054] Second, the brake is removed by power supply: if the operator thinks that the brake is needed, the brake signal will be sent to the controller, for example, the control signal for making the electromagnetic main body 50 lose power is sent to the controller N, so that the electromagnetic main body 50 loses power, the electromagnetic main body 50 no longer generates an electromagnetic attraction force, the elastic potential energy accumulated by the spring 54 is released, the spring 54 pushes the moving disc 51 to move towards the brake disc 52, so that the moving disc 51 and the brake disc 52 are combined to form a brake state.

[0055] As can be seen from the above, the present application is a power-off brake, that is, the electromagnetic brake 5 will not brake when it is powered on, and when the electromagnetic brake 5 is in a power-off state, it constitutes a brake state. The first and second states are collectively referred to as an electric control state.

[0056] However, when the electromagnetic main body 50 is in a failure state or the entire electric bull is in a power-off state, as can be known from the above, when the electromagnetic main body 50 is in a power-off state, if the position of the electric bull needs to be moved at this time, since the moving disc 51 and the brake disc 52 are combined to form a brake state, it is difficult to move in this case, at this time, the manual rotation control mechanism needs to be used to remove the brake state.

[0057] Third, the manual rotation control mechanism to release the brake state, namely the manual control state: rotating the handle body 63a, the handle body 63a will torque to the ring-shaped boss 60a, so that the transmission disc 60 rotates, assuming the initial position of the spherical component 61 and the combination slot 50d combined, because the spherical component 61 is installed in the groove 60e, the transmission disc 60 rotates and moves the spherical component 61, so that the spherical component 61 is separated from the combination slot 50d, at this time, because the transmission disc 60 and the first bearing seat 57 is less than the height of the spherical component 61 exposed outside the groove 60e, therefore, the spherical component 61 to the first bearing seat 57 and the transmission disc 60 extrusion force, because the first bearing seat 57 is fixed, so the extrusion force generated by the spherical component 61 can only drive the transmission disc 60 to the outside of the manual rotation assembly axial movement, so that the transmission disc 60 drives the connecting disc 62 and the connecting rod 58 axial movement, the connecting rod 58 drives the dynamic disc 52 to the electromagnetic body 50, the dynamic disc 52 and the brake disc 52 is in a separated state, in the process, the dynamic disc 52 compresses the spring 54 to make the spring 54 accumulate elastic potential energy.

[0058] When the handle body 63a rotates, the handle 63 rotates as a whole, so the radial protrusion 63c moves circumferentially, one of the radial protrusions 63c cooperates with the signal sending component 64, that is, the radial protrusion 63c abuts against the trigger part of the signal sending component 64, and the signal sending component 64 is in an on state. Since the signal sending component 64 is electrically connected to the controller, the controller determines that the operator releases the brake state by the manual rotation control mechanism when the signal sending component 64 is in the on state. For safety, the controller controls the wheel hub motor to be in a power-off state to avoid an accident caused by accidentally starting the wheel hub motor during manual movement of the electric vehicle.

[0059] In addition, since the connecting rod 58 passes through the waist-shaped hole 60b and is connected to the connecting disc 62, the connecting rod 58 and the connecting disc 62 do not rotate with the transmission disc 60 during the rotation of the transmission disc 60. The transmission disc 60 rotates through the waist-shaped hole 60b to avoid interference between the transmission disc 60 and the connecting rod 58.

[0060] Fourth, the manual rotation control mechanism is reset to return to the electric control state: reversing the handle body 63a to reverse the rotation of the transmission disc 60, which drives the spherical component 61 to move in the opposite direction. After the spherical component 61 is combined with the combination slot 50d, the distance between the transmission disc 60 and the first bearing seat 57 becomes smaller, the elastic potential energy accumulated in the spring 54 is released, the spring 54 drives the dynamic disc 52 to move axially, and at the same time, the dynamic disc 51 moves towards the brake disc 52. Whether the dynamic disc 52 is combined with the brake disc 52 is determined by the first or second state described above.

[0061] Since the handle body 63a is rotated reversely, the radial protrusion 63c is separated from the signal sending part 64, the signal sending part 64 is in the off state, the controller judges that the operator makes the electromagnetic brake from the manual control state to the electric control state after obtaining the signal sending part 64 in the off state, the controller cancels the control that the whole hub motor is in the power-off state, at this time whether to power on the hub motor is determined by the operator.

Claims

1. An electric ground bull, comprising a fork (A), an intermediate connecting base (B), a first articulated mechanism (C), a first connecting rod (D), a second articulated mechanism (E), a passive travel wheel (F), a support base (G), a lifting drive mechanism (H), an operating handle (K), a hub motor (L), and a battery (M). The intermediate connecting base (B) is fixed to one end of the fork (A), and the first articulated mechanism (C) is connected to the intermediate connecting base (B). It is characterized by: The first articulated mechanism (C) is articulated with one end of the first connecting rod (D), the other end of the first connecting rod (D) is articulated with the second articulated mechanism (E), the other end of the fork (A) is fixed to the second articulated mechanism (E), the passive walking wheel (F) is installed on the second articulated mechanism (E), the first articulated mechanism (C) is also articulated with the support seat (G), the lifting drive mechanism (H) is installed on the support seat (G), the lifting drive mechanism (H) is also connected to the intermediate connecting seat (B), the operating handle (K) is connected to the support seat (G), the hub motor (L) is connected to the support seat (G), the hub motor (L) is a hub motor with power-off braking, the battery (M) is installed on the intermediate connecting seat (B), and the battery (M) is connected to the hub motor (L); The hub motor (L) comprises: a shaft (1); An outer rotor motor (2) for generating torque, the outer rotor motor (2) being arranged on the shaft (1); A planetary transmission mechanism (3) matched with the shaft (1), and an outer rotor motor (2) connected to the planetary transmission mechanism (3); an outer hub (4) for receiving torque from the planetary transmission mechanism (3) and being rotatable about the shaft (1), the outer hub (4) surrounding the outer rotor motor (2), and the planetary transmission mechanism (3) cooperating with the outer hub (4); An electromagnetic brake (5) is arranged on the shaft (1) and located in the outer hub (4), the shaft (1) passes through the electromagnetic brake (5), the electromagnetic brake (5) includes a brake drive mechanism, a static disk (53), and a brake disk (52) that can move along the axial direction of the outer rotor motor (2) and rotate with the outer rotor motor (2), the brake drive mechanism includes a movable unit and a fixed unit that generates electromagnetic force, the fixed unit is fixed to the shaft (1), the movable unit and the fixed unit are clearance-matched and form a reciprocating linear motion when the fixed unit switches between power failure and power supply, the brake disk (52) is located between the movable unit and the static disk (53) and is circumferentially fixed to the outer rotor motor (2), and the static disk (53) is connected to the fixed unit as a whole; The fixed unit includes an electromagnetic body (50), a spacer (55), and a first fastener (56); the movable unit includes a movable disc (51) and a spring (54); a through hole (51a) is provided on the movable disc (51); the spacer (55) passes through the through hole (51a) on the movable disc (51) and is gap-matched with the through hole (51a); two ends of the spacer (55) respectively match the electromagnetic body (50) and the static disc (53); two ends of the spring (54) respectively match the electromagnetic body (50) and the movable disc (51); the first fastener (56) passes through the static disc (53), the spacer (55), and is fastened to the electromagnetic body (50), so that the static disc (53) and the fixed unit are connected as one body; The fixing unit also includes a first bearing seat (57) fixed to the electromagnetic body (50), the outer hub (4) includes a first end cover (4a), a second end cover (4b), an intermediate hub (4c), a first bearing (4d), and a second bearing (4e), the intermediate hub (4c) is located between the first end cover (4a) and the second end cover (4b) and is fixed to the first end cover (4a) and the second end cover (4b), the first end cover (4a) and the second end cover (4b) are both provided with bearing chambers on their inner surfaces, the first bearing seat (57) and the first bearing (4d) are both located in the bearing chamber of the first end cover (4a), the first bearing (4d) is sleeved on the first bearing seat (57), and the end of the bearing chamber on the first bearing (4d) or the first end cover (4a) forms an axial positioning for the first bearing seat (57).

2. The electric ground bull according to claim 1, characterized in that: Also included is a manual rotation control mechanism for combining or separating the movable unit and the brake disc (52), the manual rotation control mechanism comprising: A connecting rod (58), a first through hole (50c) is provided on the fixing unit, and the connecting rod (58) is clearance-fitted with the first through hole (50c); A second fastener (59), the second fastener (59) passes through the movable plate (51) and is fixed to one end of the connecting rod (58); A manual rotating assembly, wherein the connecting rod (58) cooperates with the manual rotating assembly, and the manual rotating assembly cooperates with the fixed unit. When the manual rotating assembly rotates, it moves axially along the fixed unit and drives the moving disc (51) to be connected or separated from the brake disc (52) through the connecting rod and the second fastener (59).

3. The electric ground bull according to claim 2, characterized in that: The manual rotation kit includes: A transmission disc (60), wherein one end of the transmission disc (60) is provided with a groove, the other end of the transmission disc (60) is provided with an annular boss (60a), and the transmission disc (60) is further provided with a waist-shaped hole (60b); A spherical component (61), a portion of the spherical component (61) cooperates with a groove on the transmission plate (60), a coupling groove (50d) is provided on the fixing unit, and another portion of the spherical component (61) is coupled to or separated from the coupling groove (50d); A connecting disk (62), the connecting disk (62) is sleeved on the annular boss (60a), and the connecting rod (58) is fixed to the connecting disk (62) after passing through the waist-shaped hole (60b); A handle (63) is fixed to the annular boss (60a).

4. The electric ground bull according to claim 3, characterized in that: A plurality of notches (60c) are provided on the end surface of the annular boss (60a). The handle (63) comprises a handle body (63a), a connecting ring (63b), and a radial protrusion (63c). The handle body (63a) and the connecting ring (63b) are fixed. A second through hole (60d) is provided on the annular boss (60a). The connecting ring (63b) is located in the second through hole (60d). The radial protrusion (63c) and the handle body (63a) respectively cooperate with the notches (60c).

5. The electric ground bull according to claim 4, characterized in that: The manual rotation assembly further comprises a signal sending component (64) that sends a signal to the device when combined with a radial protrusion (63c) on the handle (63), and the signal sending component (64) is fixed to the connecting disk (62).

6. The electric ground bull according to claim 1, characterized in that: The first articulated mechanism (C) comprises a first shaft (70) and an L-shaped articulated arm (71), wherein the first shaft (70) is fixed to the intermediate connecting seat (B), the L-shaped articulated arm (71) is articulated to the first shaft (70), one end of the L-shaped articulated arm (71) is articulated to the first connecting rod (D), and the other end of the L-shaped articulated arm (71) is articulated to the support seat (G).

7. The electric ground bull according to claim 1, characterized in that: The intermediate connecting seat (B) includes a first support (72) and a second support (73), one end of the first support (72) is fixed to one end of the fork (A), the other end of the first support (72) is fixed to the second support (73), the second support (73) is connected to the lifting drive mechanism (H), a cavity (74) is provided on the first support (72), the battery (M) is located in the cavity (74), and a part of the first hinge mechanism (C) is located in the cavity (74).

8. The electric ground bull according to claim 1, characterized in that: The support seat (G) includes a main support seat (80), a secondary support seat (81), a hub motor support seat (83), and a handle support seat. The main support seat (80) is hinged to the first hinge mechanism (C). The lifting drive mechanism (H) is fixed on the support seat (80). The secondary support seat (81) is sleeved on the lifting drive mechanism (H) and fixed to the lifting drive mechanism (H). The hub motor support seat (83) is fixed to the support seat (G). The handle support seat includes a connecting seat (84), an articulated shaft (85), a torsion spring (86), and a torsion spring (87). Spring (86), connecting shaft (87), connecting seat (84) and auxiliary support (81) are fixed, hinge shaft (85) is installed on connecting seat (84), operating handle (K) is hinged with connecting seat (84) through hinge shaft (85), torsion spring (86) is sleeved on hinge shaft (85), one end of torsion spring (86) is matched with operating handle (K), the other end of torsion spring (86) is connected with connecting shaft (87), and connecting shaft (87) is connected with connecting seat (84).

Images