CN107284494A

CN107284494A - Dolly

Info

Publication number: CN107284494A
Application number: CN201710609903.3A
Authority: CN
Inventors: 金宣琮
Original assignee: Individual
Current assignee: Yongkang Donghui Technology Co ltd
Priority date: 2017-07-25
Filing date: 2017-07-25
Publication date: 2017-10-24
Anticipated expiration: 2037-07-25
Also published as: CN107284494B

Abstract

The invention provides a kind of dolly, including vehicle frame and respectively positioned at the cargo bed and handle of the vehicle frame front and rear sides, the cargo bed is pivotally connected with the vehicle frame, two link assemblies for driving the cargo bed to be rotated relative to the vehicle frame are additionally provided with the vehicle frame, two link assembly with the cargo bed and vehicle frame pivot joint and constitutes planar linkage mechanism with the cargo bed and the vehicle frame respectively, the handle is connected with two link assembly, and manipulating the handle can drive the planar linkage mechanism motion cargo bed is rotated relative to the vehicle frame, the cargo bed is set to be switched between storing position and discharge position.It is an advantage of the invention that：1. making operating personnel, naturally enough symmetrically force, light effortlessly realize are unloaded and revert action；2. unloading and return operation, operating personnel and dolly are stabilized on original position, reduce operational motion, shorten the time, and ensure that goods can steadily, safely pour out cargo bed.

Description

Dolly

Technical field

The present invention relates to shipping field of mechanical technique, more particularly to a kind of dolly.

Background technology

At present, the structure of the dolly product of in the market is single, when being unloaded using existing dolly, operation Personnel need the cargo bed for spending very big physical work to make stroller to tilt to topple over goods completion unloading operation.This discharging method Have the drawback that：1. because this discharging method is that by the way of being lifted up, and it is more laborious fortune to exert a force upwards It is dynamic, therefore the consumption to operating personnel's muscle power in Discharging Process is very big.2. during unloading, operating personnel can not protect Demonstrate,prove full symmetric to the force of stroller, easily occur the situation that stroller is tumbled, therefore unload in this way also with certain Security risk.3. being unloaded using this discharging method, during upward force, forward impelling is also there is Power, can cause to make rocking for car body very unstable during unloading, make Discharging Process more dangerous, therefore in unloading behaviour Such as the position of stroller must be being limited when making, it is ensured that stroller definitely can not be again moved along during unloading, cause operation Personnel need to waste more muscle power in Discharging Process.

The content of the invention

For technical problem present in above-mentioned prior art, the invention provides a kind of dolly, its unloading operation It is laborsaving and safe.

The technical scheme is that：A kind of dolly, including vehicle frame and respectively be located at the vehicle frame front and rear sides Cargo bed and handle, the cargo bed and the vehicle frame are pivotally connected, are additionally provided with the vehicle frame for driving the cargo bed with respect to institute State vehicle frame rotation two link assemblies, two link assembly respectively with the cargo bed and the vehicle frame pivot joint and with the goods Bucket and the vehicle frame constitute planar linkage mechanism, and the handle is connected with two link assembly, and manipulates the handle Planar linkage mechanism motion can be driven the cargo bed is rotated relative to the vehicle frame, make the cargo bed storing position with Switched between discharge position.

As preferred：The handle is connected by mobile jib with two link assembly.

As preferred：Two link assembly includes the first connecting rod and second connecting rod that are mutually pivotally connected at one end, and described the The other end of one connecting rod is pivotally connected with the cargo bed, and the other end of the second connecting rod is pivotally connected with the vehicle frame.

As preferred：One end of the mobile jib is relatively fixed with the handle, and the other end is another with the second connecting rod End drive connection.

As preferred：Two link assembly is symmetrically arranged two, and the mobile jib is and two two connection rod sets Part difference is corresponding two.

As preferred：Also include being used for all fortune when the cargo bed is located at storing position to the planar linkage mechanism Dynamic pair enters line-locked lockable mechanism.

As preferred：The lockable mechanism, which includes cooperating, realizes the first lock piece and the second lock piece of locking, institute State the first lock piece to be pivotally connected with the vehicle frame, second lock piece is relatively fixed with the handle；

The lock for being provided with and coordinating with the dead bolt on dead bolt, second lock piece is provided with first lock piece Groove, when the cargo bed is located at storing position, the dead bolt, which is fastened in the locked groove, realizes first lock piece and described the Locking between two lock pieces, manipulating first lock piece and being rotated around its drive-connecting shaft can make the dead bolt deviate from the lock Groove, makes to unlock between first lock piece and second lock piece.

As preferred：The spigot surface being oriented to the return to the dead bolt is additionally provided with second lock piece, The spigot surface at the opening of the locked groove with connecting.

As preferred：It is additionally provided with the vehicle frame and carries out spacing locating part for the rotation to first lock piece And for driving the elastic component of the first lock piece return.

As preferred：The free end to the cargo bed when the cargo bed is located at storing position is additionally provided with the vehicle frame The supporting part being supported.

The beneficial effects of the invention are as follows：Reasonable in design of the present invention, two link assemblies constitute flat with cargo bed and vehicle frame Face linkage, carries out rotation using lever principle control handle relative frame and drives planar linkage mechanism to be linked, make goods The relative frame that struggles against is rotated, and realizes switching of the cargo bed between storing position and discharge position, during cargo bed is unloaded, Vehicle frame will not enter line tilt with cargo bed, but stably be fixed with respect to ground, therefore when carrying out unloading operation, without applying in addition Power keeps the stabilization of vehicle frame, so can effectively prevent the situation hair for causing vehicle to be tumbled because vehicle frame is toppled over It is raw, it is ensured that the security of Discharging Process.Because when carrying out unloading operation, vehicle frame is stably fixed with respect to ground, in operation During handle, the stability of vehicle frame will not also be impacted, simultaneously because the operation to handle make use of lever principle, The operation fulcrum of handle is located on vehicle frame, rather than ground, and making operating personnel, naturally enough symmetrically force realizes the unloading to cargo bed Operation, it is also more easily laborsaving when being operated to handle, and unloading operation does not interfere with the stability of vehicle frame, also just not Whole vehicle stability is influenced whether, vehicle will not be caused to tumble, it is ensured that the stationarity and security of unloading operation, can also shorten and unload The goods operating time.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with Other accompanying drawings are obtained according to these accompanying drawings.

Fig. 1 is the structural representation of the embodiment of the present invention；

Fig. 2 is the connection diagram of hopper, two link assemblies and mobile jib in the embodiment of the present invention；

Fig. 3 is the right view of the embodiment of the present invention；

Fig. 4 is two link assemblies and the structural representation of mobile jib junction in the embodiment of the present invention；

Fig. 5 is the structural representation that the embodiment of the present invention is in discharging state；

Fig. 6 be the embodiment of the present invention be in discharging state when in hopper, two link assemblies and mobile jib connection diagram；

Fig. 7 is the top view that the embodiment of the present invention is in discharging state.

1, vehicle frame in figure；11st, circular shaft；12nd, fixed seat；13rd, lockplate；131st, locating part；132nd, supporting part；14th, support Bolster；15th, longeron；2nd, cargo bed；21st, bottom plate；211st, hanger；3rd, handle；31st, connecting rod；32nd, mobile jib；321st, swivel head； 33rd, ratchet shaft；331st, circle segments；332nd, ratchet section；3321st, the second ratchet face；333rd, polygonal pyramid section；4th, wheel assembly；5th, two Link assembly；51st, first connecting rod；52nd, second connecting rod；521st, adapter sleeve；5211st, the first ratchet face；61st, the first lock piece； 611st, dead bolt；62nd, the second lock piece；621st, work department；6211st, locked groove；622nd, anchor ear；63rd, extension spring；7th, front component.

Embodiment

The structure of existing dolly product is single, when being unloaded using existing dolly, there is following lack Point：

1. because this discharging method is that by the way of being lifted up, and it is more laborious motion to exert a force upwards, because This is very big to the physical consumption of operating personnel in Discharging Process.

2. during unloading, operating personnel easily occur stroller and inclined it cannot be guaranteed that the force to stroller is full symmetric Situation about turning over, therefore unload in this way also with certain security risk.

3. being unloaded using this discharging method, during upward force, the power of forward impelling is also there is, It can cause to make rocking for car body very unstable during unloading, make Discharging Process more dangerous, therefore in unloading operation When such as must limit the position of stroller, it is ensured that stroller definitely can not be again moved along during unloading, cause operator Member needs to waste more muscle power in Discharging Process.

For technical problem present in above-mentioned prior art, the embodiments of the invention provide a kind of dolly, including Vehicle frame and the cargo bed and handle for being located at the vehicle frame front and rear sides respectively, the cargo bed are pivotally connected with the vehicle frame, the vehicle frame On be additionally provided with two link assemblies for driving the cargo bed to be rotated relative to the vehicle frame, two link assembly respectively with institute State cargo bed and vehicle frame pivot joint and constitute planar linkage mechanism, the handle and described two with the cargo bed and the vehicle frame Link assembly is connected, and manipulating the handle can drive the planar linkage mechanism motion to make the cargo bed relatively described Vehicle frame is rotated, and the cargo bed is switched between storing position and discharge position.

Reasonable in design of the present invention, two link assemblies constitute planar linkage mechanism with cargo bed and vehicle frame, utilize lever Principle control handle relative frame, which rotate, drives planar linkage mechanism to be linked, and rotates cargo bed relative frame, realizes Switching of the cargo bed between storing position and discharge position, during cargo bed is unloaded, vehicle frame will not be carried out with cargo bed Tilt, but stably fixed with respect to ground, therefore when carrying out unloading operation, the steady of vehicle frame is kept without force in addition It is fixed, it so can effectively prevent the situation for causing vehicle to be tumbled because vehicle frame is toppled over from occurring, it is ensured that to unload The security of journey.Because when carrying out unloading operation, vehicle frame is stably fixed with respect to ground, during operating handle, The stability of vehicle frame will not be impacted, simultaneously because the operation to handle make use of lever principle, the operation fulcrum of handle On vehicle frame, rather than ground, making operating personnel, naturally enough symmetrically force realizes the unloading operation to cargo bed, and handle is carried out It is also more easily laborsaving during operation, and unloading operation does not interfere with the stability of vehicle frame, and it is steady also to have influence on vehicle It is qualitative, vehicle will not be caused to tumble, it is ensured that the stationarity and security of unloading operation, can also shorten the unloading operation time.

Above and hereinafter mentioned cargo bed, vehicle frame, storing position and discharge position are defined as follows：

Cargo bed refers to the internal container having for the cavity of warehousing and the top opening of cavity.

Vehicle frame refers to play a supportive role to cargo bed, and for the supporting construction of the parts such as installing wheel.

Storing position refers to the opening of cargo bed upward, the location of cargo bed during loading and cargo transport.

Discharge position refers to that cargo bed is tilted forwardly and the entire cargo in it leaves cargo bed under self gravitation effect Position.

To make the object, technical solutions and advantages of the present invention clearer, technical scheme will be carried out below Detailed description.Obviously, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.

Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment in the present invention, this area is common The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to what the present invention was protected Scope.

It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.

In the description of the invention, it is to be understood that the orientation or position of the instruction such as term " on ", " under ", "left", "right" It is or the orientation or position that the invention product is usually put when using based on orientation shown in the drawings or position relationship to put relation Put relation, or the orientation that usually understands of those skilled in the art or position relationship, be for only for ease of the description present invention and Simplify description, rather than indicate or imply that the equipment or element of meaning there must be specific orientation, with specific azimuth configuration And operation, therefore be not considered as limiting the invention.

In the description of the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ", " installation " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected.For this For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.

Embodiment 1:

As shown in Figures 1 to 7, the embodiments of the invention provide a kind of dolly, including vehicle frame 1 and respectively be located at car The cargo bed 2 and handle 3 of the front and rear sides of frame 1.

In the present embodiment, as shown in fig. 7, vehicle frame 1 includes two longerons 15 that are symmetrical and be arrangeding in parallel, two 15 points of longerons Fixation is not attached in front-end and back-end and forms rectangular frame structure, the front end of two longerons 15 is connected with front component 7, two The rear end of root longeron 15 is connected with wheel assembly 4.Front component 7 and wheel assembly 4 are respectively comprising two wheels, i.e. the present embodiment Dolly be four-wheel dolly, its driving stability.

Cargo bed 2 is located at the top of front component 7.

Cargo bed 2 is pivotally connected with vehicle frame 1.Specifically, as depicted in figs. 1 and 2, cargo bed 2 is removably mounted on bottom plate 21, bottom Plate 21 is pivotally connected by the first articulated part with vehicle frame 1.

Bottom plate 21 has the shape that the bottom with cargo bed 2 fits, and is mutually accordingly opened in the bottom of bottom plate 21 and cargo bed 2 Provided with through hole, bottom plate 21 is realized by the bolt and nut component that is located in the two through hole (including bolt, nut, pad etc.) Being detachably connected between cargo bed 2.By such structure, it can facilitate and cargo bed 2 is changed and repaired, because cargo bed 2 be the part of direct contact goods, and easy generation abrasion weakens bearing strength and is even damaged after long-term use, only needs at that time Cargo bed 2 is unloaded into the new cargo bed 2 of installation can complete maintenance.And by the setting of bottom plate 21, to realize cargo bed 2 and vehicle frame 1 Between connection, so also there is protective effect to cargo bed 2, during cargo bed 2 is overturn, the torsional stress of articulated section passes through Bottom plate 21 is carried, and is not directly transferred in cargo bed 2, it is to avoid have influence on cargo bed 2 because torsional stress causes cargo bed 2 to deform Service life, so that the overall structure for enhancing the dolly of the embodiment of the present invention is stable.Set in the left and right sides of bottom plate 21 Flanging is put, the structural strength for strengthening bottom plate 21.

In the present embodiment, as shown in Figure 1 to Figure 3, the first articulated part includes hanger 211 and circular shaft 11, and hanger 211 passes through weldering Connect or the mode such as bolt connection is fixed on bottom plate 21.In the present embodiment, hanger 211 is weldingly fixed on bottom plate 21.Hanging The first axle sleeve is welded with ear 211.The quantity of hanger 211 is at least one, when the quantity of hanger 211 is set to multiple, The first rotary axle box for being better able to ensure on the Stability Analysis of Structures of the pivot joint between bottom plate 21 and vehicle frame 1, all hangers 211 is same Axle is set.In the present embodiment, the quantity of hanger 211 is two, and two hangers 211, which are symmetric, to be welded on bottom plate 21.Circular shaft 11 are located in two the first axle sleeves.

Second axle sleeve coaxial with the first axle sleeve is fixedly installed in the front end of vehicle frame 1, the second axle sleeve is symmetrically arranged Two, two the second axle sleeves respectively fix by solid two longerons 15 with vehicle frame 1.Two the first axle sleeves be located at even the second axle sleeve it Between, circular shaft 11 is located in two the first axle sleeves and two the second axle sleeves simultaneously.The two ends of circular shaft 11 stretch out two second respectively Outside axle sleeve, and external screw thread is machined with the part that the second axle sleeve is stretched out at the two ends of circular shaft 11, forms two external thread sections, and outside The pin-and-hole of radial direction is machined with thread segment, after circular shaft 11 is installed with respect to the first axle sleeve and the second axle sleeve, respectively in two external screw threads Duan Shangjun installs pad and hexagon slotted nut successively, and split pin is then inserted in pin-and-hole, prevents hexagon slotted nut from circle The thread segment of axle 11 is released.

Two link assemblies 5 for driving the relative frame 1 of cargo bed 2 to rotate, two 5 points of link assemblies are additionally provided with vehicle frame 1 It is not pivotally connected with cargo bed 2 and vehicle frame 1 and constitutes planar linkage mechanism with cargo bed 2 and vehicle frame 1.

In the present embodiment, as shown in Fig. 2 two link assemblies 5 are by first connecting rod 51 and second connecting rod 52 pivot joint group at one end Into.The other end of first connecting rod 51 is pivotally connected and (is pivotally connected with cargo bed 2) with bottom plate 21, the other end and the pivot of vehicle frame 1 of second connecting rod 52 Connect.First connecting rod 51 is located at bottom plate 21 and the rear of the articulated section of vehicle frame 1 with the articulated section of bottom plate 21.First connecting rod 51 and second connecting rod 52 articulated section is located at first connecting rod 51 and the lower section of the articulated section of bottom plate 21, when cargo bed 2 is located at storing position, first connecting rod It is mutually at an acute angle between 51 and second connecting rod 52.So when first connecting rod 51 deploys with respect to second connecting rod 52, by the rear end of cargo bed 2 Upward jack-up forward, makes cargo bed 2 rotate realization around circular shaft 11 and turns forward until reaching discharge position.

Handle 3 is connected with two link assemblies 5, and control handle 3 can drive planar linkage mechanism motion to make cargo bed 2 Relative frame 1 is rotated, and cargo bed 2 is switched between storing position and discharge position.

In the present embodiment, handle 3 is connected by mobile jib 32 with two link assemblies 5.Handle 3 is symmetrically arranged two, two Individual handle 3 is connected by connecting rod 31.

In the present embodiment, as shown in Fig. 2 two link assemblies 5 are two symmetrically and be arranged in parallel.Two two link assemblies The other end of 5 second connecting rod 52 closes on the part pivot joint of rear end with two longerons 15 of vehicle frame 1 respectively.

Correspondingly, mobile jib 32 is two corresponding with the quantity of two link assembly 5.One end of two mobile jibs 32 and connecting rod 31 It is fixedly connected, realizes its being relatively fixed between handle 3, the other end is passed with the second connecting rod 52 of corresponding two link assembly 5 Dynamic connection.

Two two link assemblies 5 are respectively positioned between two longerons 15, and two mobile jibs 32 are respectively positioned on the outside of two longerons 15, I.e. every mobile jib 32 and its corresponding two link assembly 5 are located at the both sides of correspondence longeron 15 respectively.It is each on every longeron 15 It is fixedly installed in a fixed seat 12, fixed seat 12 and offers mounting hole, the fixed seat 12 on two longerons 15 is symmetrical arranged, And the mounting hole of two fixed seats 12 is coaxially disposed.

As shown in figure 4, being wholely set in the one end of second connecting rod 52 away from first connecting rod 51 of each two link assembly 5 Adapter sleeve 521, adapter sleeve 521 and the mounting hole of fixed seat 12 are coaxial, adapter sleeve 521 towards fixed seat 12 end face be the first spine The flank of tooth 5211, is provided with the first ratchet of circumferentially array distribution on the first ratchet face 5211.

Ratchet shaft 33 is rotatably connected in mounting hole, ratchet shaft 33 includes the circle segments 331 being rotatably assorted with mounting hole And respectively positioned at the ratchet section 332 and polygonal pyramid section 333 at the two ends of circle segments 331, the diameter of wherein ratchet section 332 is more than circle The diameter of section 331, the maximum circumscribed circle diameter of polygonal pyramid section 333 is less than or equal to the diameter of circle segments 331.

Ratchet 332 end faces away from circle segments 331 of section are the second ratchet face 3321, are provided with the second ratchet face 3321 Circumferentially the second ratchet of array distribution, the second ratchet face 3321 is engaged with the first ratchet face 5211 of adapter sleeve 521.

The axis hole through its two ends, the diameter of axis hole and the diameter of bore of adapter sleeve 521 are also machined with inside ratchet shaft 33 It is identical.Hexagonal blind hole is also machined with end face of the adapter sleeve 521 away from the first ratchet face 5211.

It is fixedly installed on swivel head 321, swivel head 321 and offers and spine the every one end of mobile jib 32 away from handle 3 The polygonal pyramid hole that the polygonal pyramid section 333 of wheel shaft 33 coordinates, the two ends of polygonal pyramid hole insertion swivel head 321, and polygonal pyramid hole is big End and small end are respectively less than big end and the small end of polygonal pyramid section 333, can when being located in so as to polygonal pyramid section 333 in polygonal pyramid hole Realize the fastness connected between swivel head 321 and ratchet shaft 33.In the present embodiment, polygonal pyramid hole and polygonal pyramid section 333 Section is regular hexagon.

During installation, the adapter sleeve 521 on swivel head 321 and second connecting rod 52 on mobile jib 32 is respectively positioned at fixed seat 12 Both sides, the circle segments 331 of ratchet shaft 33 are located in the mounting hole of fixed seat 12, and the second of the ratchet section 332 of ratchet shaft 33 Ratchet face 3321 engages formation transmission with the first ratchet face 5211 of adapter sleeve 521 and coordinated, and polygonal pyramid section 333 stretches into swivel head In 321 polygonal pyramid hole, pass through attachment spacers and spiral shell after a screw bolt passes adapter sleeve 521, ratchet shaft 33 and adapter sleeve 521 Mother, adapter sleeve 521, ratchet shaft 33 and adapter sleeve 521 are locked, the drive connection formed between mobile jib 32 and second connecting rod 52, The pivot joint formed simultaneously between second connecting rod 52 and longeron 15, that is, the pivot joint formed between second connecting rod 52 and vehicle frame 1.

Drive connection between mobile jib 32 and second connecting rod 52 is realized by above structure, at the same realize second connecting rod 52 with Pivot joint between longeron 15, that is, second connecting rod 52 is linked with mobile jib 32 when ensure that control handle 3, can pass through ratchet shaft again 33 and the cooperation of adapter sleeve 521 alleviate the torsional stress that second connecting rod 52 is carried, extend the service life of two link assemblies 5.

In order that the rotation between second connecting rod 52 and vehicle frame 1 is more smooth, can also fixed seat 12 mounting hole with Bearing is installed between the circle segments 331 of ratchet shaft 33 and length according to ratchet shaft 33 and its length between fixed seat 12 Relation increases pad and/or cushion cover on ratchet shaft 33, to ensure the stabilization being connected between second connecting rod 52 and mobile jib 32 Property.

The dolly of the embodiment of the present invention also includes being used for when cargo bed 2 is located at storing position to planar linkage mechanism All kinematic pairs enter line-locked lockable mechanism.

As shown in Figure 1, Figure 2, shown in Fig. 5 and Fig. 6, lockable mechanism, which includes cooperating, realizes the first lock piece 61 and the of locking Two lock pieces 62.First lock piece 61 is string configuration, and its one end is positive stop end, and the other end is locking end, is set at locking end It is equipped with the dead bolt 611 protruded to side.Second lock piece 62 has to be provided with and dead bolt in a work department 621, the work department 621 611 locked grooves 6211 coordinated.

First lock piece 61 is pivotally connected with vehicle frame 1, and the second lock piece 62 is relatively fixed with handle 3.When cargo bed 2 is located at storing position Dead bolt 611 is fastened on the locking realized in locked groove 6211 between first lock piece 61 and the second lock piece 62 when putting, and manipulates first Lock piece 61 is rotated around its drive-connecting shaft can make dead bolt 611 deviate from locked groove 6211, make the first lock piece 61 and the second lock piece 62 Between unlock.

Lockable mechanism is at least provided with one, in the present embodiment, is two according to the quantity of mobile jib 32, therefore be correspondingly arranged two Individual lockable mechanism, to realize more stable locking effect, two lockable mechanisms are to be symmetrical arranged.

Specifically, as shown in Fig. 1, Fig. 3, Fig. 5 and Fig. 7, two lockplates 13, two lockings are symmetrical arranged on vehicle frame 1 Plate 13 is respectively and fixedly installed on two longerons 15.Each lockplate 13 is located at two link assemblies 5 being mutually connected and master Between bar 32.Each lockable mechanism is located at the side of dorsad two link assemblies 5 of lockplate 13.

First lock piece 61 is located at second connecting rod 52 and the top of the articulated section of longeron 15.First lock piece 61 and lockplate The articulated section of 13 pivot joints, the first lock piece 61 and lockplate 13 is located at the first lock piece 61 close to the part of limiting section, and it is pivotally connected Drive-connecting shaft of the axle parallel to second connecting rod 52.When lockable mechanism is in the lock state, the positive stop end of the first lock piece 61 is higher than Locking end, and positive stop end is located at the front at locking end, dead bolt 611 is diagonally downward towards the front of vehicle frame 1.

Second lock piece 62 also has the anchor ear 622 for being arranged on the side of work department 621, and the second lock piece 62 passes through anchor ear 622 are fixedly mounted on corresponding mobile jib 32.When lockable mechanism is located at lock-out state, the second lock piece 62 is located at the first locking The lower section of part 61, dead bolt 611 is arranged in locked groove 6211.The opening of locked groove 6211 is obliquely and towards the rear of vehicle frame 1, with lock Tongue 611 coordinates, and first lock piece 61 is rotated around its drive-connecting shaft can be with Dead bolt 611 is deviate from from locked groove 6211, realize the unblock operation between the first lock piece 61 and the second lock piece 62.First locking After the unblock of the lock piece 62 of part 61 and second, you can downward control handle 3 makes mobile jib 32 with the axis of the mounting hole of fixed seat 12 For pivoted downward, second connecting rod 52 is driven to be rotated up, so that first connecting rod 51 links after upward jack-up cargo bed 2 End, makes cargo bed 2 rotate forward and tilts to up to discharge position.

As shown in Figure 2 and Figure 6, it is additionally provided with phase at the opening with locked groove 6211 in the work department 621 of the second lock piece 62 The spigot surface connect.At the opening of the spigot surface that spigot surface is oriented to for the return to dead bolt 611, spigot surface and locked groove 6211 Connect.After discharging is completed, being lifted up handle 3 is rotated up mobile jib 32, the second lock piece 62 with mobile jib 32 back up Position, spigot surface is contacted with dead bolt 611 first, and dead bolt 611 is rotated up under the stirring of spigot surface, while dead bolt 611 is along guiding Face is slided until dead bolt 611 is reached at the opening of locked groove 6211, and as mobile jib 32 continues up rotation, dead bolt 611 is caught in locked groove In 6211.During being rotated up in mobile jib 32, dead bolt 611 can be caught in locked groove 6211 automatically, in locking The elastic component for driving the return of the first lock piece 61 is additionally provided with plate 13.Elastic component can use and be located in the first lock piece In torsion spring on 61 drive-connecting shaft, the present embodiment, elastic component uses extension spring 63, and one end of extension spring 63 is fixed on first The middle part of lock piece 61, the other end is fixed on before being tilted towards on lockplate 13, and extension spring 63 is fixed on lockplate 13 One end is located at the lower section of the first lock piece 61.

The locating part 131 that there is the flange that dorsad two link assemblies 5 are bent to form to constitute at the top of lockplate 13, is used for Rotation progress to the first lock piece 61 is spacing.

It is additionally provided with and the free end of cargo bed 2 is supported in the front end of lockplate 13 when cargo bed 2 is located at storing position Supporting part 132.The rear end of cargo bed 2 is the free end of cargo bed 2.Supporting buffer member 14 is additionally provided with supporting part 132, is delayed Impulsive force when rushing 2 return of cargo bed between supporting part 132.In the present embodiment, cargo bed 2 is fixedly mounted on bottom plate 21, works as goods When bucket 2 is located at storing position, bottom surface rear end and the supporting buffer member 14 of bottom plate 21 are affixed.Supporting buffer member 14 can also be in cargo bed 2 built with goods when, buffering cargo bed 2 is to the pressure of vehicle frame 1.Supporting buffer member 14 can be made of materials such as plastics, rubber.

The method for carrying out unloading operation using the dolly of the embodiment of the present invention is as follows：

1. dolly is pushed into discharge position, and ensure that dolly is parked steadily in discharge position；

2. pulling the first locking plate upwards, dead bolt 611 is deviate from out of the second locking plate locked groove 6211, release first and lock The only locking between plate and the second locking plate；

Drive mobile jib 32 to rotate down 3. persistently pushing handle 3, second connecting rod 52, first connecting rod 51 and cargo bed 2 is linked, Cargo bed 2 is set to turn forward arrival discharge position, as shown in Figures 5 to 7；

4. keeping cargo bed 2 in discharge position, until the goods in cargo bed 2 drops out cargo bed 2 completely, unloading is completed；

The method for carrying out return operation to cargo bed 2 after the completion of unloading is as follows：

Persistently lifting handle 3 drives mobile jib 32 to be rotated up, and second connecting rod 52, first connecting rod 51 and cargo bed 2 is linked, makes Cargo bed 2, which rotates backward, to be returned to up to storing position, as shown in Figure 1 to Figure 3.

During handle 3 is lifted, the second lock piece 62 is rotated up with mobile jib 32, when the second lock piece 62 is transported Move to the position contacted with dead bolt 611, continue to lift handle 3, dead bolt 611 is upward turn under the stirring of the second lock piece 62 Dynamic, dead bolt 611 presses close to the spigot surface of the second lock piece 62 and to the direction of locked groove 6211 under the elastic force effect of extension spring 63 Slide, when dead bolt 611 is reached at the opening of locked groove 6211, under the elastic force effect of extension spring 63, dead bolt 611 is moved downward certainly Locking that is dynamic to be caught in inside locked groove 6211, being formed between the first lock piece 61 and the second lock piece 62, that is, form handle 3 and vehicle frame Locking between 1.

During discharging and return, power is passed through between mobile jib 32 and second connecting rod 52 by control handle 3 The transmission of the first ratchet face 5211 and the second ratchet face 3321 formation power of drive connection is realized, dexterously power is transferred to The planar linkage mechanism that vehicle frame 1, the link assembly 5 of cargo bed 2 and two are constituted, realizes that cargo bed 2 exists by the linkage of planar linkage mechanism Switching between storing position and discharge position.

The advantage of dolly of the present invention is：1. operating personnel naturally enough symmetrically exerted a force, easily effortlessly realized Unloading and revert action；2. when unloading and return operation, operating personnel and dolly are stabilized on original position, reduced Operational motion, shorten the time, and ensure that goods can steadily, safely pour out cargo bed.

Embodiment 2：

The present embodiment and the difference of embodiment 1 are：Front component is only set on vehicle frame, and front component includes at least one Individual wheel, wheel assembly is then used can ensure that vehicle is placed smoothly support hook and replaced in loading and unloading.

Embodiment 3：

The present embodiment and the difference of embodiment 1 are：Front component on vehicle frame only includes a wheel, or vehicle frame On wheel assembly only include wheel.

More than, it is only the embodiment of the present invention, but protection scope of the present invention is not limited thereto, and it is any to be familiar with Those skilled in the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be covered Within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims

1. a kind of dolly, including vehicle frame (1) and the cargo bed (2) and handle that are located at the vehicle frame (1) front and rear sides respectively (3), it is characterised in that：The cargo bed (2) is pivotally connected with the vehicle frame (1), is additionally provided with the vehicle frame (1) described for driving Two link assemblies (5) that cargo bed (2) is rotated relative to the vehicle frame (1), two link assembly (5) respectively with the cargo bed (2) And the vehicle frame (1) pivot joint and constitute planar linkage mechanism with the cargo bed (2) and the vehicle frame (1), the handle (3) and Two link assembly (5) drive connection, and manipulate the handle (3) that the planar linkage mechanism motion can be driven to make is described Cargo bed (2) is rotated relative to the vehicle frame (1), the cargo bed (2) is switched between storing position and discharge position.

2. dolly according to claim 1, it is characterised in that：The handle (3) passes through mobile jib (32) and described two Link assembly (5) is connected.

3. dolly according to claim 2, it is characterised in that：Two link assembly (5) includes mutual at one end The first connecting rod (51) and second connecting rod (52) of pivot joint, the other end and the cargo bed (2) of the first connecting rod (51) are pivotally connected, institute The other end and the vehicle frame (1) for stating second connecting rod (52) are pivotally connected.

4. dolly according to claim 3, it is characterised in that：One end of the mobile jib (32) and the handle (3) It is relatively fixed, the other end of the other end and the second connecting rod (52) is connected.

5. dolly according to claim 4, it is characterised in that：Two link assembly (5) is symmetrically arranged two Individual, the mobile jib (32) is corresponding two with two two link assemblies (5) difference.

6. dolly as claimed in any of claims 1 to 5, it is characterised in that：Also include being used in the goods Line-locked lockable mechanism is entered to all kinematic pairs of the planar linkage mechanism when bucket (2) is located at storing position.

7. dolly according to claim 6, it is characterised in that：The lockable mechanism, which includes cooperating, realizes locking The first lock piece (61) and the second lock piece (62), first lock piece (61) and the vehicle frame (1) be pivotally connected, described second Lock piece (62) is relatively fixed with the handle (3)；

It is provided with dead bolt (611), second lock piece (62) and is provided with and the dead bolt on first lock piece (61) (611) locked groove (6211) coordinated, when the cargo bed (2) is located at storing position, the dead bolt (611) is fastened on the locked groove (6211) locking between first lock piece (61) and second lock piece (62) is realized in, first locking is manipulated Part (61) is rotated around its drive-connecting shaft can make the dead bolt (611) deviate from the locked groove (6211), make first lock piece (61) unlocked between second lock piece (62).

8. dolly according to claim 7, it is characterised in that：Be additionally provided with second lock piece (62) with it is right The spigot surface that the return of the dead bolt (611) is oriented to, the spigot surface at the opening of the locked groove (6211) with connecting.

9. dolly according to claim 6, it is characterised in that：It is additionally provided with the vehicle frame (1) for described The rotation of first lock piece (61) carries out spacing locating part (131) and for driving the first lock piece (61) return Elastic component.

10. dolly according to claim 6, it is characterised in that：It is additionally provided with the vehicle frame (1) when the cargo bed (2) supporting part (132) being supported when being located at storing position to the free end of the cargo bed (2).