CN107804128B

CN107804128B - Trolley

Info

Publication number: CN107804128B
Application number: CN201710829421.9A
Authority: CN
Inventors: 肖卫国; 贺喜
Original assignee: Individual
Current assignee: Wang Shuting
Priority date: 2017-09-14
Filing date: 2017-09-14
Publication date: 2021-10-01
Anticipated expiration: 2037-09-14
Also published as: CN107804128A

Abstract

The invention relates to a movable trolley, in particular to a trolley. The trolley comprises a frame, two axles and a plurality of wheels, wherein the two axles are respectively positioned on two opposite sides of the frame parallel to the moving direction of the trolley, each axle comprises two oppositely arranged ends, the position of the axle close to one end part is in rotatable connection with the frame, the position of the axle close to the other end part is in elastic connection with the frame, the wheels are respectively connected to two ends of the axle, when the trolley travels on an uneven road surface, the axle rotates around the position of the axle in rotatable connection with the frame, and the distance between each wheel, the axle and the frame changes under the action of elastic force. The trolley disclosed by the invention has the advantages of good road surface adaptability, good damping effect and the like, and is more comfortable for bearing objects.

Description

Trolley

[ technical field ] A method for producing a semiconductor device

The invention relates to a movable trolley, in particular to a trolley.

[ background of the invention ]

With the development of the times, the performance requirements of users on the mobile trolley are higher and higher. When the precision or value of the product transported on the trolley is high, the user puts higher demands on the shock resistance of the trolley. The shock-proof performance of the prior art trolley can not meet the requirements of users gradually.

Therefore, how to provide a trolley with good shock resistance becomes a demand in the technical field of mobile trolleys!

[ summary of the invention ]

The invention provides a trolley, aiming at solving the technical problem that the existing transportation trolley is poor in shock resistance.

The invention provides a trolley, which comprises a frame, two axles and a plurality of wheels, wherein the two axles are respectively positioned at two opposite sides of the frame parallel to the moving direction of the trolley, each axle comprises two opposite ends, the position of the axle close to one end part is rotatably connected with the frame, the position of the axle close to the other end part is elastically connected with the frame, the wheels are respectively connected with two ends of the axle, when the trolley runs on an uneven road surface, the axle rotates around the rotatably connected part of the axle and the frame, and the distance among the wheels, the axles and the frame changes back and forth under the action of elastic force.

Preferably, the trolley further comprises a shock absorber, and one end of the axle, which is elastically connected with the frame, is elastically connected with the frame through the shock absorber.

Preferably, the trolley further comprises a controller, the shock absorber comprises a damper, the controller is connected to the damper, and the controller controls damping change of the damper according to road surface conditions.

Preferably, the axle includes first plate body, second plate body, third plate body, fourth plate body and fifth plate body, first plate body, second plate body, third plate body, fourth plate body and fifth plate body end to end in proper order are "nearly" font of falling, first plate body place end do the axle with frame rotatable coupling's one end, fifth plate body place end do the axle with frame elastic connection's one end.

Preferably, the fourth plate body is provided with a yielding groove, the yielding groove is formed in the end face, away from one end of the third plate body, of the fourth plate body and is formed in the end face, close to the third plate body, of the fourth plate body, and the shock absorber is partially arranged in the yielding groove and is rotatably connected with the bottom of the yielding groove.

Preferably, the trolley further comprises a limiting mechanism, the limiting mechanism comprises a first limiting device and a second limiting device which are arranged in a split mode, one of the first limiting device and the second limiting device is fixedly connected with the trolley frame, the other of the first limiting device and the second limiting device is fixedly connected with the trolley axle, and at least part of the second limiting device is accommodated in the first limiting device to limit the trolley frame to move relative to the trolley axle along the horizontal plane direction.

Preferably, the trolley further comprises a fixing mechanism, the fixing mechanism comprises a first fixing device and a second fixing device which are arranged in a split mode, one of the first fixing device and the second fixing device is fixedly connected with the trolley frame, the other of the first fixing device and the second fixing device is fixedly connected with the trolley axle, and the first fixing device and the second fixing device can be fixed together to at least limit the trolley frame to move relative to the trolley axle in the direction of a vertical horizontal plane.

Preferably, the wheel comprises a wheel seat, a motor, a gear box and a wheel, wherein the motor and the gear box are fixed on the axle, a rotating shaft of the motor is connected with the gear box, the gear box is connected with the wheel seat, the wheel seat is rotatably connected with the wheel, and the motor drives the wheel seat to rotate through the gear box so as to realize 360-degree steering of the wheel.

Preferably, the wheel further comprises a wheel, a wheel seat, a brake disc and a brake, the wheel seat is connected with the axle, the wheel is rotatably connected with the wheel seat, the brake comprises a brake driving unit and two brake friction members, the brake driving unit is fixed on the wheel seat, the brake friction members are fixedly connected with the brake driving unit, the wheel is coaxially connected with the brake disc and rotatably connected with the wheel seat, the brake is fixed on the wheel seat, at least one brake friction member is arranged on each of two sides of the brake disc, and the brake driving unit can push the two brake friction members to approach each other to move and clamp the brake disc.

Preferably, the gear box is a hollow speed reducer, a first wiring channel is arranged at the axis of the central shaft of the gear box, the wheel further comprises a connecting piece, one end of the connecting piece is connected with the gear box, one end of the connecting piece is connected with the wheel seat, a second wiring channel penetrating through the connecting piece is arranged on the connecting piece, and the first wiring channel is communicated with the second wiring channel.

Compared with the prior art, the trolley comprises a frame, an axle and a plurality of wheels, wherein the axle comprises a first end part and a second end part which are arranged oppositely, the position of the axle close to the first end part is rotatably connected with the frame, the position of the axle close to the second end part is elastically connected with the frame, the wheels are respectively connected with the first end part and the second end part of the axle, when the trolley travels on an uneven road surface, the axle rotates around the position where the axle is rotatably connected with the frame, the distance between the wheels, the axle and the frame changes back and forth under the action of the elastic force, the energy of the vibration of the trolley is consumed in the work of the relative movement of one end of the axle and one end of the frame, the other end of the axle and the other end of the frame are rotatably connected, the change of the distance between the axle and the frame is small, so that the trolley can resist vibration, the whole has slight vibration and has excellent anti-vibration performance, compared with the prior art, the anti-vibration effect is greatly improved, and the road surface adaptability is further improved.

The trolley also comprises a shock absorber, the position of the axle close to the second end is elastically connected with the frame through the shock absorber, the shock absorber can better consume energy generated by the vibration of the trolley, the trolley runs more stably, and the vibration of the trolley is small when the trolley moves.

The trolley also comprises a controller, the shock absorber comprises a damper, the controller is connected with the damper, the controller controls damping change of the damper according to the road surface condition, the trolley can adapt to different road surfaces, good shock absorption effect can be achieved, and adaptability of the trolley is improved.

The vehicle axle is inverted 'n' -shaped, has a reasonable structure, reduces the center of the trolley, and ensures that the trolley runs more stably.

The fourth plate body is provided with the abdicating groove, the abdicating groove is arranged from the end face of one end of the fourth plate body, which is far away from the third plate body, to one end of the third plate body, which is close to the third plate body, the shock absorber is partially arranged in the abdicating groove and is rotatably connected with the bottom of the abdicating groove, the abdicating groove reduces the weight of the axle, the height of the trolley, the center of the trolley, the volume of the trolley and the cost of the trolley.

The trolley also comprises a limiting mechanism, wherein the limiting mechanism comprises a first limiting device and a second limiting device which are arranged in a split mode, one of the first limiting device and the second limiting device is fixedly connected with the trolley frame, the other of the first limiting device and the second limiting device is fixedly connected with the axle, and at least part of the second limiting device is accommodated in the first limiting device to limit the trolley frame to move along the horizontal plane direction relative to the axle, so that the trolley is more stable in advancing and cannot be easily deformed, and the performance of the trolley is further improved.

The trolley also comprises a fixing mechanism, wherein the fixing mechanism comprises a first fixing device and a second fixing device which are arranged in a split manner, one of the first fixing device and the second fixing device is fixedly connected with the trolley frame, the other one of the first fixing device and the second fixing device is fixedly connected with the vehicle axle, the first fixing device and the second fixing device can be fixed together to limit the movement of the trolley frame relative to the vehicle axle along the direction vertical to the horizontal plane, when goods are loaded and unloaded onto the trolley, the vehicle axle and the trolley frame are relatively fixed, the trolley cannot shake, and the goods are loaded and unloaded more safely

The motor drives the wheel seat to rotate through the gear box so as to realize 360-degree steering of the wheels, the trolley moves in any direction, the steering is not obstructed, the steering effect is good, the steering is quick, and the adaptability of the trolley is improved.

The brake driving unit can push the two clamping pieces to approach each other so as to move and clamp the brake disc, the trolley can brake in time, and the generated heat is low during braking, so that the braking effect is good.

The gear box is a hollow speed reducer, a first wiring channel is arranged at the axis of a central shaft of the gear box, the wheel further comprises a connecting piece, one end of the connecting piece is connected with the gear box, one end of the connecting piece is connected with the wheel seat, a penetrating second wiring channel is arranged on the connecting piece, the first wiring channel is communicated with the second wiring channel, the first wiring channel and the second wiring channel are used for a circuit on a trolley wheel to penetrate through, and when the trolley wheel rotates, the line cannot be broken due to the fact that the number of turns of the wheel in the same direction is too large.

[ description of the drawings ]

FIG. 1 is a schematic perspective view of the cart of the present invention.

FIG. 2 is a side view of the cart of the present invention.

FIG. 3 is a schematic front view of the cart of the present invention.

Fig. 4 is a partial perspective view of the cart of the present invention.

Fig. 5 is a perspective view of the damper of the present invention.

FIG. 6 is a schematic view of a connection structure of the anti-roll device, the shock absorber and the limiting plate.

Fig. 7 is a partial structural schematic view of the cart of the present invention.

Fig. 8 is a schematic view of the structure of fig. 7 from another perspective.

Fig. 9 is a schematic view of the structure of the wheels of the cart of the present invention.

Fig. 10 is a schematic perspective view of the cart attachment of the present invention.

[ detailed description ] embodiments

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

Referring to fig. 1, the present invention provides a trolley 1, wherein the trolley 1 comprises a trolley body 10 and wheels 30, and the wheels 30 are connected with the trolley body 10. The wheels 30 are capable of moving the body 10 during operation.

Referring also to fig. 2-4, the vehicle body 10 includes a frame 11 and two axles 12, a first axle 13 and a second axle 15. The first axle 13 and the second axle 15 are respectively located on opposite sides of the frame 11 parallel to the direction of movement of the trolley 1. The first axle 13 includes a first end 131 and a second end 132 disposed opposite to each other, the first axle 13 is pivotally connected to the frame 11 at a position close to the first end 131, the first axle 13 is elastically connected to the frame 11 at a position close to the second end 132, the wheels 30 are respectively connected to the first end 131 and the second end 132 of the first axle 13, when the vehicle 1 travels on an uneven road, the first axle 13 rotates around the position where the first axle 13 is pivotally connected to the frame 11, and the distance between the wheels 30, the first axle 13 and the frame 44 changes under the elastic force. It is to be understood that the number of wheels 30 connected to both end portions of the first axle 13 is not limited to one, and may be plural.

The body 10 also comprises an anti-roll device 17 and a shock absorber 19. A part of the anti-roll device 17 is fixedly connected to the frame 11, and the anti-roll device 17 is elastically connected to both axles 12 via both shock absorbers 19. The shock absorber 19 is retractable after an impact force and returns to its original shape after the impact force is removed. When the trolley 1 runs on an uneven road surface, the shock absorber 19 is compressed, the shock absorber 19 can be shortened and lengthened, the shock absorber 19 generates elastic force to the axle 12 and the anti-roll device 17, the axle 12 rotates relative to the frame 11, and the distance between the axle 12, the wheels 30 and the frame 11 changes back and forth under the elastic force. The frame 11 is more stable, and the shock-proof effect of the trolley 1 is better.

The first axle 13 also includes an intermediate portion (not numbered) connected between the first end portion 131 and the second end portion 132. The first axle 13 is pivotally connected to the frame 11 at a position near the first end 131, and the first axle 13 is elastically connected to the anti-roll device 17 at a position near the second end 132 via the shock absorber 19. Preferably, the height of the middle portion is at least partially lower than the height of the first end portion 131 and/or the second end portion 132. Preferably, the height of the middle part is lower than that of the two end parts at the same time, the gravity center of the trolley 1 is low, and the travelling is more stable. In the present embodiment, the first end 131 and the second end 132 are equal in height. Alternatively, the first axle 13 further includes a first plate 135, a second plate 136, a third plate 137, a fourth plate 138, and a fifth plate 139. The first plate body 135, the second plate body 136, the third plate body 137, the fourth plate body 138 and the fifth plate body 139 are sequentially connected end to form an inverted' shape. The first plate 135 is located at the first end 131, and the fifth plate 139 is located at the second end 132. Preferably, the first plate 135, the third plate 137 and the fifth plate 139 are substantially parallel to a horizontal plane. Preferably, the second plate 136 and the fourth plate 138 are substantially vertical and horizontal. Preferably, the second plate 136 and the third plate 137 are fixedly connected to the frame 11 at a position to lower the center of gravity of the vehicle 1. A yielding groove 1381 is formed in the fourth plate 138, the yielding groove 1381 is formed from the end surface of the end, far away from the third plate 137, of the fourth plate 138 to the end, close to the third plate 137, of the fourth plate 137, and the shock absorber 19 is partially arranged in the yielding groove 1381 and connected with a bottom rotating shaft of the yielding groove 1381. When the vehicle 1 travels on an uneven road surface, the shock absorber 19 extends and contracts back and forth, the wheel 30 and the first axle 13 rotate around the connection point of the first axle 13 and the frame 11, and the distance between the wheel 30, the first axle 13 and the frame 11 changes back and forth. It is understood that the term "plurality" as used herein means "two or more".

The second axle 15 includes a third end portion (not numbered), a fourth end portion (not numbered), and the like. The structure of the second axle 15 is identical to that of the first axle 13, and the second axle 15 is identical to the connection structure of the shock absorber 19, the anti-roll device 17, the frame 11, the wheel 30, etc., so that the present invention will not be described. It is worth noting that the ends of the first axle 13, the second axle 15 and the frame 11, which are pivotally connected, are located at the same end of the trolley 1, i.e. the third end portion and the first end portion 131 are located at the same end of the trolley 1. It will be appreciated that the vehicle 1 may also be provided with only one axle 12, the axle 12 being located in the vertical middle of the vehicle 1, as is the case with known two-wheel vehicles.

Referring to fig. 5 and 6 together, a plurality of shock absorbers 19 are provided, each shock absorber 19 includes a damper 191 and an elastic member 192, and the dampers 191 and the elastic members 192 correspond to each other one by one. The damper 191 and the elastic member 192 are both retractable after being stressed and return to their original shape after the force is removed, and when an impact force in a direction perpendicular to the road surface is applied, the damper 191 is shortened and the elastic member 192 is compressed to provide a buffering force, and when the impact force is removed, the damper 191 and the elastic member 192 return to their original shape. The elastic member 192 is preferably a spring. The damper 19 is preferably a magnetorheological damper or a spring damper or a hydraulic damper or a CDC damper. Each elastic member 192 is disposed over a damper 191. One end of the damper 191 is connected with the rotating shaft of the first axle 13, and the other end of the damper 191 is connected with the rotating shaft of the anti-roll device 17. The connection point of the damper 191 and the first axle 13 is lower than the second end 132 or the first end 131. It will be appreciated that the shock absorber 19 may be pivotally connected to the frame 11 without the anti-roll device 17, and the shock absorber 19 may be directly pivotally connected to the frame 11, such as by providing a raised integrally formed shaft, rod or plate on the frame 11, and the shock absorber 19 may be pivotally connected to an integrally formed shaft, rod or plate on the frame 11.

Preferably, the cart 1 further includes a controller and sensors (neither shown) that may be provided on the frame 11 or on the damper 191, etc., as desired. The controller is electrically connected to the sensor and the damper. The controller controls the damping change of the damper according to the road surface condition sensed by the sensor. The parameters sensed by the sensors include, but are not limited to, one or more of the flatness of the road surface, the vibration amplitude of the trolley 1, the load capacity of the trolley 1, the running speed, the impact force received, etc.

The bottom of the anti-roll device 17 is fixedly connected with the frame 11, and two opposite ends of the anti-roll device 17 are connected with the shock absorber 19 through a rotating shaft. When the trolley 1 travels on an uneven road surface, the shock absorber 19 compresses to generate elastic force on the anti-tilting device 17, the anti-tilting device 17 can generate reaction force on the shock absorber 19, the anti-tilting device 17 is not easy to deform, and the trolley 1 is prevented from toppling. It will be appreciated that the anti roll device 17 may be formed integrally with the frame 11.

Referring to fig. 6 to 8, the body 10 of the trolley 1 further includes a limiting mechanism (not numbered). The limiting mechanism comprises a first limiting device 25 and a second limiting device 27 which are arranged in a split mode. One of the first limiting device 25 and the second limiting device 27 is fixedly connected with the vehicle frame 11, the other one is fixedly connected with the first vehicle axle 13, and the second limiting device 27 is at least partially accommodated in the first limiting device 25 and limits the vehicle frame to move along the horizontal plane direction relative to the vehicle axle. In this embodiment. The first stop device 25 is fixedly connected to the first axle 13, and the second stop device 27 is fixedly connected to the frame 11.

The second limiting means 27 is preferably a limiting plate, which is substantially vertical to the horizontal plane. The limiting plate is accommodated in the first limiting device 25 along the width direction, and the width of the limiting plate is gradually reduced from one end close to the road surface to one end far away from the road surface. Preferably, the shape of the stopper plate 27 in the width direction is gradually changed in an arc shape. The axle 12 is connected around the rotating shaft of the frame 11, so the limit plate 27 is arc-shaped, and is a position-giving way for the rotation of the axle 12, and the interference between the limit plate 27 and the axle 12 is prevented.

The first stopper 25 includes a connection plate 251, the connection plate 251 is fixedly connected to the first axle 13, and a gap perpendicular to the horizontal plane is formed in the connection plate 251 such that the stopper plate is partially received in the gap, i.e., inserted into the gap. Specifically, the first position-limiting device 25 further includes two slide rails 254 and a plurality of rotating rollers 252. The slide rail 254 is fixed on the connection plate 251 in parallel, and a plurality of rotary rollers 252 are installed on the slide rail 254, and the rotary rollers 252 can rotate relative to the slide rail 254 and the connection plate 251. The rotating rollers 252 form two rows, the straight line of the sliding rail 254, the straight line of each row of the rotating rollers 252 and the horizontal plane are approximately vertical, the gap 253 is formed between the two rows of the rotating rollers 252, and the limiting plate is inserted into the gap 253 along the width direction. The width of the gap is 0-3mm, preferably 0-2mm, more preferably 0-1mm, and 0-0.8mm larger than the thickness of the limiting plate. It is understood that the rotating rollers 252 may not be provided and the stopper plate 27 is located between the slide rails 254. It is understood that the slide rails 254 may not be provided, the rotatable rollers 252 may be formed in two rows, each rotatable roller 252 may be rotatably coupled to the connection plate 251, and a gap may be formed between the two rows of rotatable rollers 252. It can be understood that the slide rail 254 may not be fixed on the connection plate 251, and a limit slide groove may be formed on the connection plate 251 to form a slide rail.

The body 10 of the trolley 1 further comprises a fixing mechanism (not numbered), the fixing mechanism comprises a first fixing device 21 and a second fixing device 23 which are arranged in a split mode, one of the first fixing device 21 and the second fixing device 23 is fixedly connected with the frame 11, the other of the first fixing device 21 and the second fixing device 23 is fixedly connected with the first axle 13, the first fixing device 21 and the second fixing device 23 can be fixed together, the frame 11 and the first axle 13 form a whole, movement of the frame 11 relative to the first axle 13 in the direction of a vertical horizontal plane is at least limited, when goods and the like are placed or unloaded on the trolley 1, the trolley 1 cannot shake up and down, and the placing or unloading of the goods cannot be influenced. In this embodiment. The first fixing device 21 is fixedly connected with the frame 11, and the second fixing device 23 is fixedly connected with the first axle 13.

The second fixing means 23 is preferably a fixing plate. The fixed plate is fixed to the first axle 13. Preferably, the fixing plate 23 is substantially vertical to the horizontal plane. As a variant, the second fastening device is fastened to the first axle 13 via the connecting plate 251 of the first stop device 25.

The first fixing device 21 is preferably a clamping device, and when the fixing device 21 is operated, the second fixing device 23 is clamped, and the first axle 13 and the frame 11 can be fixed into a whole. Specifically, the first fixing device 21 includes a driving unit 211 and at least two clamping members 212, the driving unit 211 is fixed on the frame, the clamping members 212 are fixedly connected to the driving unit 211, at least one clamping member 212 is disposed on each of two sides of the fixing plate, and the driving unit 211 can push the two clamping members 212 to move the fixing plate. In the present embodiment, the clamping device is preferably a disc brake that clamps the fixed plate 23 under hydraulic actuation. The disc brake is a brake in the prior art, and the specific structure of the disc brake is not further described in the invention. The invention changes the brake into the fixing device 21 of the trolley 1, has simple structure and realizes the clamping function.

It will be appreciated that the connection of the second axle 15 to the spacing mechanism is identical to the connection of the first axle 13 to the spacing mechanism; the connection structure of the second axle 15 to the fixing mechanism is identical to the connection structure of the first axle 13 to the limiting mechanism, and the invention is not described again.

Referring to fig. 9 and 10, the wheel 30 includes a wheel 38, a motor 31, a gear box 32, a wheel seat 33, a brake disc 37, and a brake 36. The motor 31 and the gear box 32 are fixed on the axle 12, the rotating shaft of the motor 31 is connected with the gear box 32, the gear box 32 is connected with the wheel seat 33, the wheel 38 and the brake disc 37 are coaxially connected and rotatably connected with the wheel seat 33, and the brake 36 is fixedly connected with the wheel seat 33. The rotating shaft of the motor 31 rotates to drive the gear box 32 to rotate, and further drives the wheel seat 33 and the wheel 38 to rotate so as to realize 360-degree rotation of the wheel 38, and the steering is flexible; when the brake 36 works, the brake disc 37 is clamped to prevent the wheel 38 from rotating, and the trolley 1 realizes braking. It will be appreciated that the wheels 38 effect a 360 rotation with the central axis of rotation perpendicular to the road surface, and that the wheels effect steering of the vehicle.

The motor 31 is preferably a stepper motor, the speed of which can be controlled and accurate, and the distance traveled by the trolley 1 is accurate. The motor 31 may be a general motor. The motor 31 can realize positive and negative rotation, so that the trolley 1 can turn left and right; the motor 31 can rotate continuously in the same direction, and the wheel 38 can rotate like a universal wheel.

The gear box 32 is preferably a worm gear reducer. The connection structure of the gear box 32 and the rotation shaft of the motor 31 is preferably a key connection. The gear box 32 is preferably a hollow gear box, that is, a hollow speed reducer, and a first routing channel (not numbered) is disposed at an axis of a central shaft of the gear box and is used for passing through a conductive wire.

The wheel 30 also includes a coupling (not numbered) for coupling the gear box 32 and the wheel housing 33. And a second wiring channel (not numbered) is arranged at the central shaft of the connecting piece, and the first wiring channel is communicated with the second wiring channel. Thus, the conductive wires on the wheel 30 pass through the first wire channel and the second wire channel to be electrically connected to the devices outside the wheel 30, and no wire winding occurs when the wheel 38 rotates 360 °. Specifically, the connecting member includes a connecting rod 34 and a flange 35, and the connecting rod 34 is inserted into the gear case 32 and connected to the gear case 32. The connection structure of the connecting rod 34 and the gear case 32 is preferably a keyed connection. The connecting rod 34 is fixedly connected with the wheel seat 33 through the flange 35, and the gear box 32 rotates to drive the connecting rod 34, the flange 35 and the wheel seat 33 to rotate. Preferably, the connecting rod 34 and the flange 35 are integrally formed. The second routing channel extends axially through both the tie bar 34 and the flange 35.

The wheel mount 33 is "L" shaped with one end fixedly connected to the flange 35 and the other end rotatably connected to the wheel 38. The wheel seat 33 is provided with a hole for fixedly connecting with the brake 36.

The brake 36 includes a brake driving unit (not shown) fixed to the wheel holder 33, and at least two brake friction members (not shown) fixedly connected to the brake driving unit, at least one brake friction member being provided on each of both sides of the brake disc 37, and the wheel hydraulic unit may push the brake friction members toward each other to move the brake disc 37 to clamp the brake disc 37 against rotation of the wheel 38. The brake 36 is preferably a disc brake. The disc brake has simple structure, good braking effect and lower generated heat. In this embodiment, only one embodiment of the disc brake is shown, and the disc brake is a brake in the prior art, and the specific structure of the disc brake will not be further described.

The brake disc 37 is provided with a plurality of heat dissipating holes (not shown). Preferably, the heat radiating holes are symmetrical about the center of the axis of the brake disk 37. Preferably, the heat dissipation holes are through holes.

A driving motor (not shown) is arranged in the wheel 38, and when the driving motor works, the trolley 1 is driven to move. The wheel 38 comprises a tire. Preferably, the tire is an inflation-free hollow tire made of rubber, and the tire has good ground holding force and better durability. Preferably, the surface of the tire is provided with patterns, and the tire has better ground holding force.

As a variation, the wheel comprises a wheel and a shaft, the wheel being fixedly attached to the shaft and rotatably attached to the wheel carrier via the shaft, the wheel further comprising a second brake assembly 39, the second brake assembly 39 being fixed to the wheel carrier and preferably being an electromagnetic brake, at least a portion of the electromagnetic brake locking the shaft against rotation when the electromagnetic brake is activated. In this manner, the wheel assembly may achieve parking on level roads or on slopes.

The structure of the car 1 of the present invention is suitable for an Automated Guided Vehicle (AGV), i.e., an AGV car. The AGV trolley has higher requirements on the moving distance and the shock absorption performance, and the structure of the trolley 1 is more perfect, the shock absorption performance is better, and the steering effect is better. It can be understood that the technical solution disclosed by the present invention can also be applied to other trolleys for moving or transporting, such as patrol cars, transfer cars, electric cars, logistics cars, etc.

It will be appreciated that the pivotal connection described in the present invention is a connection between two elements which can be pivoted relative to each other about their point of connection. If the specific structure of the pivot connection between the end of the damper 191 and the first axle 13 is a shaft passing through the end of the damper 191 and the first axle 13, the shaft is the connection point between the end of the damper 191 and the first axle 13, and the damper 191 can rotate relative to the first axle 13 around the shaft. The rotary shaft structure is not particularly limited, and may be a ball joint structure or other structures capable of realizing relative rotation.

When the trolley is used, the trolley 1 needs to move, the driving motor of the wheels 30 works, and the trolley 1 moves; when the trolley 1 runs on an uneven road surface, the whole axle 12 rotates relative to the frame 11, one end of the axle 12 moves back and forth relative to the frame 11, and kinetic energy is eliminated on the action of the shock absorber 19; and stop device 25 and limiting plate 27 limit axle 12 and horizontal hunting, guarantee the stationarity of dolly 1 operation, when dolly 1 loads and unloads goods, fixing device 21 is fixed plate 23, makes axle 12 and frame 11 be an organic whole, and axle 12 and frame 11 are fixed relatively, and dolly 1 can not rock, and loading and unloading goods are safer.

The gear box is a hollow speed reducer, a first wiring channel is arranged at the central shaft of the gear box, the wheel further comprises a connecting piece, one end of the connecting piece is connected with the gear box, one end of the connecting piece is connected with the wheel seat, a penetrating second wiring channel is arranged on the connecting piece, the first wiring channel is communicated with the second wiring channel, the first wiring channel and the second wiring channel are used for a circuit on a trolley wheel to penetrate through, and when the trolley wheel rotates, the line cannot be broken due to the fact that the wheels rotate for too many turns in the same direction.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.

Claims

1. A kind of dolly, its characterized in that: the trolley comprises a frame, two axles and a plurality of wheels, wherein the two axles are respectively positioned on two opposite sides of the frame parallel to the moving direction of the trolley, each axle comprises two oppositely arranged ends, the position of the axle close to one end part is rotatably connected with the frame, the position of the axle close to the other end part is elastically connected with the frame, the wheels are respectively connected with the two ends of the axle, when the trolley travels on an uneven road surface, the axle rotates around the rotatably connected position of the axle and the frame, and the distance between the wheel, the axle and the frame changes under the action of elastic force.

2. The cart of claim 1, wherein: the trolley further comprises a shock absorber, and one end of the axle, which is elastically connected with the frame, is elastically connected with the frame through the shock absorber.

3. The cart of claim 2, wherein: the trolley further comprises a controller, the shock absorber comprises a damper, the controller is connected to the damper, and the controller controls damping change of the damper according to the road surface condition.

4. The cart of claim 2, wherein: the axle comprises a first plate body, a second plate body, a third plate body, a fourth plate body and a fifth plate body, wherein the first plate body, the second plate body, the third plate body, the fourth plate body and the fifth plate body are sequentially connected end to form an inverted 'n' -shaped structure, the first plate body is positioned at one end of the axle and one end of the frame, the first plate body is rotatably connected with the axle, and the fifth plate body is positioned at one end of the frame, the axle and the other end of the frame are elastically connected with the frame.

5. The cart of claim 4, wherein: the fourth plate body is provided with a yielding groove, the yielding groove is formed in the end face, away from one end of the third plate body, of the fourth plate body and is formed in the end face, close to the third plate body, of the fourth plate body, and the shock absorber is arranged in the yielding groove and is rotatably connected with the bottom of the yielding groove.

6. The cart of claim 1, wherein: the trolley further comprises a limiting mechanism, the limiting mechanism comprises a first limiting device and a second limiting device which are arranged in a split mode, one of the first limiting device and the second limiting device is fixedly connected with the trolley frame, the other of the first limiting device and the second limiting device is fixedly connected with the trolley axle, at least part of the second limiting device is contained in the first limiting device, and the trolley frame is limited to move relative to the trolley axle along the horizontal plane direction.

7. The cart of claim 1, wherein: the trolley further comprises a fixing mechanism, the fixing mechanism comprises a first fixing device and a second fixing device which are arranged in a split mode, one of the first fixing device and the second fixing device is fixedly connected with the trolley frame, the other fixing device is fixedly connected with the trolley axle, the first fixing device and the second fixing device can be fixed together, and movement of the trolley frame relative to the trolley axle in the direction of a vertical horizontal plane is at least limited.

8. The cart of claim 1, wherein: the wheel comprises a wheel seat, a motor, a gear box and a wheel, wherein the motor and the gear box are fixed on an axle, a rotating shaft of the motor is connected with the gear box, the gear box is connected with the wheel seat, the wheel seat is rotatably connected with the wheel, and the motor drives the wheel seat to rotate through the gear box so as to realize 360-degree steering of the wheel.

9. The cart of claim 1, wherein: the wheel further comprises a wheel, a wheel seat, a brake disc and a brake, the wheel seat is connected with the axle, the wheel is rotatably connected with the wheel seat, the brake comprises a brake driving unit and two brake friction pieces, the brake driving unit is fixed on the wheel seat, the brake friction pieces are fixedly connected with the brake driving unit, the wheel is coaxially connected with the brake disc and rotatably connected with the wheel seat, the brake is fixed on the wheel seat, at least one brake friction piece is arranged on each of two sides of the brake disc, and the brake driving unit can push the two brake friction pieces to approach each other so as to move and clamp the brake disc to prevent the wheel from rotating.

10. The cart of claim 8, wherein: the wheel is characterized in that the gear box is a hollow speed reducer, a first wiring channel is arranged at the axis of the central shaft of the gear box, the wheel further comprises a connecting piece, one end of the connecting piece is connected with the gear box, one end of the connecting piece is connected with the wheel seat, a second wiring channel which penetrates through the connecting piece is arranged on the connecting piece, and the first wiring channel is communicated with the second wiring channel.