CN219409163U - Lifting mechanism and transport vehicle - Google Patents

Abstract

The application relates to the technical field of transport vehicles and provides a lifting mechanism and a transport vehicle. The lifting mechanism comprises a fixed frame, a lifting frame and a driving device; the lifting frame can be lifted relative to the fixed frame through the guide structure; the guide structure comprises a guide rail part arranged on one of the lifting frame and the fixing frame and a roller part arranged on the other; the guide rail part extends along the vertical direction, and the rollers in the roller part are used for rolling along the guide rail part so as to enable the lifting frame to move along the vertical direction under the driving of the driving device. The lifting mechanism provided by the application has the advantages that compared with a screw guide rail structure, the requirements on machining precision and mounting precision are low, the production and the manufacture are easy, the problems of guide rail deformation, poor component matching and the like are not easy to occur, the adverse phenomena of blocking or blocking of lifting actions and the like are obviously reduced or even eliminated, the smoothness and the stability of the lifting actions are improved, and the problem that blocking is easy to occur due to lifting displacement through the screw guide rail structure on a transport vehicle in the prior art is solved.

Description

Lifting mechanism and transport vehicle

Technical Field

The application relates to the technical field of transport vehicles, in particular to a lifting mechanism and a transport vehicle.

Background

Heavy load lifting is involved in many conditions, and therefore, various types of equipment have lifting mechanisms, such as transport equipment (e.g., automated guided vehicles, AGVs for short). At present, a screw guide rail structure is generally used for vertical lifting, and the screw guide rail structure needs high matching precision, so that lifting action blocking is easily caused by factors such as machining precision and mounting precision of a frame, and the service life of equipment is also reduced.

Disclosure of Invention

In view of this, the embodiments of the present application are directed to providing a lifting mechanism, so as to solve the problem that in the prior art, the clamping is easily generated by lifting displacement through a screw guide rail structure on a transport vehicle.

The application provides a lifting mechanism, which comprises a fixed frame, a lifting frame and a driving device; the lifting frame is arranged in a liftable manner relative to the fixing frame through a guide structure; the guide structure comprises a guide rail part arranged on one of the lifting frame and the fixed frame and a roller part arranged on the other; the guide rail part extends along the vertical direction, and the rollers in the roller part are used for rolling along the guide rail part so that the lifting frame is driven by the driving device to move along the vertical direction.

In one possible implementation manner, the guide rail part comprises at least two guide rails distributed along the circumferential direction of the lifting frame, the roller part comprises at least two groups of roller groups distributed along the circumferential direction of the fixing frame, and the guide rail part and the roller part are spliced in the vertical direction so that each roller group is correspondingly abutted with each guide rail.

In one possible implementation manner, the guide rail part and the roller part are all annular integrally, the body of the driving device is fixed on the fixing frame and is positioned in the inner ring of the guide rail part or the roller part, and the driving end of the driving device is hinged with the lifting frame and is positioned in the inner ring of the roller part or the guide rail part.

In one possible embodiment, the rail portion comprises a guide rail and the roller portion comprises a roller set; one of the guide rail and the roller set is provided with a butt joint groove, and the other is provided with a butt joint part embedded in the butt joint groove, so that the roller set and the guide rail are butted in the horizontal direction.

In one possible implementation manner, the guide rail is a V-shaped slide rail, and the roller set includes two rollers distributed in a V shape, so that a V-shaped groove in butt joint with the V-shaped slide rail is formed between the two rollers.

In one possible embodiment, the rail portion comprises a guide rail and the roller portion comprises a roller set; the lifting mechanism is also provided with a distance adjusting structure for adjusting the gap between the roller group and the guide rail.

In one possible embodiment, the distance adjusting structure includes: the adjusting block is arranged in a moving way along the direction approaching to or separating from the guide track, and the rollers of the roller group are arranged on the adjusting block; the sliding groove accommodates the adjusting block and is used for sliding the adjusting block; the pushing piece pushes the adjusting block to slide.

In one possible embodiment, the adjusting block is connected to the chute by a connecting piece and is provided with a bar-shaped hole through which the connecting piece passes and is displaced relatively.

In one possible implementation manner, the adjusting block is provided with a pushing protrusion, a fixed block opposite to the pushing protrusion is arranged in the chute, and the pushing piece is telescopically arranged on the fixed block.

The application also provides a transport vehicle, which comprises a vehicle body and the lifting mechanism.

According to the lifting mechanism, the lifting frame is driven by the driving device to move, meanwhile, the lifting frame is restrained by the guide part which is vertically arranged, and the lifting frame moves along the vertical direction under the driving of the relative rolling displacement generated by the roller part and the guide part, so that the smoothness and the stability of the vertical displacement of the lifting frame are ensured. Compared with a screw guide rail structure, the structure provided by the application has lower requirements on machining precision and mounting precision, is easy to produce and manufacture, is not easy to generate problems of guide rail deformation, poor component matching and the like, obviously reduces or even eliminates adverse phenomena such as blocking or blocking of lifting actions, improves the smoothness and stability of the lifting actions, ensures the horizontal stability of the lifting actions, and avoids shaking of the lifting frame.

Drawings

Fig. 1 is an overall schematic diagram of a lifting mechanism in an embodiment of the present application;

FIG. 2 is a schematic view of a lifting frame according to an embodiment of the present application;

FIG. 3 is a schematic view of a fixing frame according to an embodiment of the present application;

FIG. 4 is a schematic view of a roller fixing platform according to an embodiment of the present application;

FIG. 5 is a schematic view of a distance adjusting structure according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a roller set according to an embodiment of the present disclosure;

FIG. 7 is a schematic view of the interfacing of the roller set and the guide rail in an embodiment of the present application;

fig. 8 is a schematic diagram of a transporter in an embodiment of the present application.

In fig. 1-8:

1. a lifting frame; 11. lifting the platform; 12. a guide rail; 13. a hinge base; 2. a fixing frame; 21. a body frame; 22. a fixed block; 23. a fixing seat; 24. a roller fixing platform; 25. a pushing member; 3. a driving device; 4. a roller set; 41. an adjusting block; 42. a roller; 43. pushing the bulge; 5. and a vehicle body.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Referring to fig. 1-8, an embodiment of the present application provides a lifting mechanism for lifting a load. The lifting mechanism comprises a fixed frame 2, a lifting frame 1 and a driving device 3, wherein the lifting frame 1 is movably arranged relative to the fixed frame 2 through a guide structure, and the driving device 3 provides driving power for the movement of the lifting frame 1. The guide structure comprises a guide part and a roller part. One of the guiding part and the roller part is arranged on the lifting frame 1, and the other is arranged on the fixed frame 2. The guiding part extends along the vertical direction, and the roller part comprises rollers and is used for rolling along the guiding track 12 under the action of driving power provided by the driving device 3. When the lifting frame 1 is driven by the driving device 3 to displace, the lifting frame is restrained by the guide part, and the lifting displacement is generated in the vertical direction under the driving of the driving device 3 through the relative rolling displacement of the roller part and the guide part. So set up, lifting frame 1 can receive the restraint of guide part, only can follow vertical direction and remove, and gyro wheel portion rolls and makes lifting frame 1 remove for guide part simultaneously under the driving action, and frictional force is little, and gyro wheel and orbital structure cooperation is good, and it is smooth and easy to remove, has ensured lifting frame 1's vertical displacement's smoothness and stationarity. Compared with a lead screw guide rail structure, the structure provided by the application has lower requirements on machining precision and mounting precision, is easy to produce and manufacture, is not easy to generate problems of guide rail deformation, poor component matching and the like, obviously reduces or even eliminates adverse phenomena such as blocking or blocking of lifting actions, improves the smoothness and stability of the lifting actions, ensures the horizontal stability of the lifting actions, and avoids shaking of the lifting frame 1.

In some embodiments, the guiding portion is disposed on the lifting frame 1, the roller portion is disposed on the fixing frame 2, and in other embodiments, the guiding portion is disposed on the fixing frame 2, and the roller portion is disposed on the lifting frame 1. In the drawings provided by the application, the implementation situation that the guiding part is arranged on the lifting frame 1 and the roller part is arranged on the fixing frame 2 is shown. This type of implementation is described below.

In some embodiments, as shown in fig. 2, the lifting frame 1 includes a main frame, where the main frame includes a lifting platform 11, a guiding portion is disposed below the lifting platform 11, and the guiding portion includes at least two guiding rails 12 circumferentially distributed along the lifting portion, each guiding rail 12 extends in a vertical direction, and a top end may be connected to the lifting platform 11, so that the guiding portion is entirely equivalent to being surrounded by each guiding rail 12 circumferentially distributed to form a ring, and supports the lifting platform 11. The main frame includes, in addition to the lifting platform 11, a column for supporting the lifting platform 11 and a cross bar for connecting adjacent columns, and the guide rail 12 may be laid on the column, so as to fix and stabilize, and also to stably and stably support the lifting platform 11.

The fixing frame 2 comprises a body frame 21, the roller part comprises roller groups 4 with at least two components, and the roller groups 4 with a plurality of components are distributed along the circumferential direction of the fixing frame 2, namely the body frame 21. As shown in fig. 3, a plurality of roller fixing platforms 24 are circumferentially arranged on the body frame 21, and the roller group 4 is arranged on the roller fixing platforms 24. The number of roller groups 4 may be the same as the number of guide rails 12, such as one guide rail 12 corresponding to a component roller group 4. The number of guide tracks 12 and roller sets 4 may be three, four, five or more. In the drawing, four guide rails 12 are provided, four components are provided for the roller group 4, and the four components are uniformly distributed in the circumferential direction.

The guide portion corresponds to a protrusion, and the roller portion corresponds to a recess, and the guide portion and the roller portion are inserted in the vertical direction, and each guide rail 12 and the corresponding roller group 4 are correspondingly abutted, as shown in fig. 1 and 8. The roller sets 4 are located either on the inside or outside of the rings of the guide, i.e. on the opposite or opposite side of each guide rail 12, corresponding to clips or outer struts of the guide. So set up, lift platform 11 obtains stable and steady support, and guaranteed the straightness of guiding part, guarantees the whole vertical movement precision and the removal stationarity of lifting frame 1, prevents that lifting frame 1 from producing the direction skew, effectively improves lift platform 11's horizontal stability.

As shown in fig. 1, 3 and 8, among the roller groups 4 of each component, at least two roller groups 4 are provided in a vertical direction portion, that is, two roller groups 4 are provided for each guide rail 12 in the vertical direction. It can also be said that there are two rings of roller sets 4 which hug or bear against the rail sections, i.e. the guide tracks 12 distributed in the circumferential direction. By the arrangement, the connection between the lifting frame 1 and the fixed frame 2 is firmer, the guiding precision is higher, and the precision of the vertical movement of the lifting frame 1 and the levelness of the lifting platform 11 are further improved.

In some embodiments, the driving device 3 is a hydraulic cylinder, the cylinder body is arranged on the fixed frame 2, and the hydraulic rod is hinged with the lifting frame 1 to drive the lifting frame 1 to lift and displace. For example, as shown in fig. 3, a fixing seat 23 for fixing a body (such as a hydraulic cylinder body) of the driving device 3 is provided on a frame 21 of the fixing frame 2, and as shown in fig. 2, a hinge seat 13 hinged with a driving end (such as a piston rod of the hydraulic cylinder) of the driving device 3 is provided on a main frame of the lifting frame 1, and the hinge seat 13 is located below the lifting platform 11, so that the driving device 3 directly pushes the lifting platform 11. Therefore, the driving device 3 is vertically lifted, the power transmission is direct, the loss rate is small, the lifting load is basically equal to the oil cylinder thrust, compared with a scissor fork and a multi-link mechanism, the oil cylinder thrust is not required to be amplified, the oil cylinder diameter can be reduced, the volume of a hydraulic system can be correspondingly reduced, and the overall structural arrangement is more convenient.

For example, since the guide rail 12 and the roller sets 4 are all circumferentially distributed, so that the guide rail portion and the roller portion are all annular, in some embodiments, the body of the driving device 3 is fixed on the fixing frame 2 and located in an inner ring of the roller portion (i.e. in a space surrounded by each of the roller sets 4 circumferentially distributed), and the driving end of the driving device is hinged with the lifting frame 1 and located in an inner ring of the guide rail portion (i.e. in a space surrounded by each of the guide rails 12 circumferentially distributed).

Of course, in other embodiments, the roller set 4 may be disposed on the lifting frame 1, and the driving device 3 directly drives the rollers in the roller set 4 to rotate to drive the lifting frame 1 to move along the guiding rail 12

To enhance the butting property of the guide rail 12 and the roller set 4, and prevent the skew, in some embodiments, one of the guide rail 12 and the roller set 4 is formed with a butting groove, and the other is formed with a butting portion embedded in the butting groove, so that the roller set 4 and the guide rail 12 are butted in the horizontal direction.

Specifically, as shown in fig. 2 and fig. 5-7, the guide rail 12 is a V-shaped slide rail, the V-shaped portion of the V-shaped slide rail forms the above-mentioned abutting portion, and the roller set 4 includes two rollers 42 distributed in a V-shape, so that a V-shaped groove is formed between the two rollers 42 to abut against the V-shaped portion of the V-shaped slide rail.

The roller group 4 comprises an adjusting block 41, two fixing plates distributed in a V shape are arranged on the adjusting block 41, and the two rollers are respectively fixed on the two fixing plates, as shown in fig. 6. And the adjusting block 41 is arranged on the roller fixing platform 24 to ensure the height consistency of the two rollers 42. Meanwhile, the roller group 4 forms a small module, can be manufactured in a modularized manner, is installed on the fixing frame 2 in a modularized manner, is easy to manufacture, and is easy to ensure the installation accuracy so as to be in butt joint with the guide rail 12 more accurately.

Further, to facilitate the docking of the guide rail 12 and the roller set 4, in some embodiments, the lifting mechanism is further provided with a distance adjusting structure for adjusting the gap between the roller set 4 and the guide rail 12. In this way, in the horizontal direction, the gap between the roller group 4 and the guide rail 12 can be adjusted, the butt joint of the guide rail part and the roller part can be realized more easily, and the butt joint precision can be improved; meanwhile, on the other hand, the lifting frame has a distance adjusting structure, so that the precision requirements on parts in the processing, manufacturing and assembling processes can be reduced, the roller wheel part and the guide rail part are easier to manufacture, and the high precision, the moving smoothness and the horizontal stability of the lifting platform 11 of the vertical movement of the lifting frame 1 can be ensured on the basis of easy manufacture.

The distance adjusting structure comprises an adjusting block 41, a sliding groove arranged on the fixed frame 2 and a pushing piece 25 pushing the adjusting block 41. As shown in fig. 3-7, the chute is provided on the roller fixing platform 24; the adjusting block 41 is movably arranged in the chute along the direction approaching or separating from the guide rail 12, and the rollers of the roller group 4 are arranged on the adjusting block 41, or the roller group 4 is movably arranged in the chute through the adjusting block 41; the pushing piece 25 is also arranged on the fixed frame 2 and used for pushing the adjusting block 41 to slide so as to adjust the gap between the roller group 4 and the guide rail 12.

The adjusting block 41 may be connected to the chute by a connecting member and provided with a bar-shaped hole through which the connecting member passes and is relatively displaced. The connecting member may be a fastener such as a bolt, and passes through a bar-shaped hole in the adjusting block 41 and into the fixing frame 2 to fix the adjusting block 41 in the chute. When the adjusting block 41 is pushed by the pushing piece 25, the adjusting block 41 can move in the chute due to the structure of the strip-shaped hole, so that the roller is carried to move, and the gap between the roller group 4 and the guide rail 12 is adjusted.

The pushing member 25 is telescopically arranged on the fixed frame 2. As shown in fig. 4-6, the adjusting block 41 is provided with a pushing protrusion 43, the chute is provided with a fixed block 22 opposite to the pushing protrusion 43, and the pushing member 25 is telescopically arranged on the fixed block 22. The pushing piece 25 can be in threaded connection with the fixed block 22, for example, the pushing piece 25 is a bolt, so that the manufacturing is very convenient, and the use is very convenient.

The pushing member 25 may be disposed separately from the adjusting block 41, and of course, in some embodiments, the pushing member 25 may be connected to the adjusting block 41 and move with the adjusting block 41 in the chute.

Embodiments of the present application also provide a transport vehicle comprising a vehicle body 5 and a lifting mechanism as described in any of the embodiments above. The transport vehicle provided by the application can ensure that the goods can be stably supported in the process of carrying the goods, and can stably lift the goods, so that dangerous phenomena caused by shaking of the goods due to clamping or tilting of the lifting mechanism can not be generated.

The transport vehicle may be an automatic guided transport vehicle, or AGV for short.

The basic principles of the present application have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not limiting, and these advantages, benefits, effects, etc. are not to be considered as necessarily possessed by the various embodiments of the present application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not intended to be limited to the details disclosed herein as such.

The components, arrangements, etc. referred to in this application are meant to be illustrative examples only and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the drawings. These components, devices, may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It should also be noted that in the apparatus, devices of the present application, the components may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent to the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model to the precise form disclosed, and any modifications, equivalents, and alternatives falling within the spirit and principles of the present utility model are intended to be included within the scope of the present utility model.

Claims (10)

1. The lifting mechanism is characterized by comprising a fixed frame, a lifting frame and a driving device; the lifting frame is arranged in a liftable manner relative to the fixing frame through a guide structure;

the guide structure comprises a guide rail part arranged on one of the lifting frame and the fixed frame and a roller part arranged on the other; the guide rail part extends along the vertical direction, and the rollers in the roller part are used for rolling along the guide rail part so that the lifting frame is driven by the driving device to move along the vertical direction.

2. The lifting mechanism as recited in claim 1, wherein the rail portion includes at least two guide rails circumferentially distributed along the lifting frame, the roller portion includes at least two sets of roller sets circumferentially distributed along the fixing frame, and the rail portion and the roller portion are inserted in a vertical direction so that each of the roller sets is correspondingly abutted against each of the guide rails.

3. The lifting mechanism as claimed in claim 2, wherein the guide rail portion and the roller portion are both integrally formed in a ring shape, and the body of the driving device is fixed to the fixing frame and is located in the inner ring of the guide rail portion or the roller portion, and the driving end of the driving device is hinged to the lifting frame and is located in the inner ring of the roller portion or the guide rail portion.

4. The lift mechanism of claim 1, wherein the rail portion comprises a guide rail and the roller portion comprises a roller set; one of the guide rail and the roller set is provided with a butt joint groove, and the other is provided with a butt joint part embedded in the butt joint groove, so that the roller set and the guide rail are butted in the horizontal direction.

5. The lift mechanism of claim 4, wherein the guide rail is a V-shaped rail, and the roller set comprises two rollers arranged in a V-shape, such that a V-shaped groove is formed between the two rollers, and the V-shaped groove is in butt joint with the V-shaped rail.

6. The lift mechanism of claim 1, wherein the rail portion comprises a guide rail and the roller portion comprises a roller set; the lifting mechanism is also provided with a distance adjusting structure for adjusting the gap between the roller group and the guide rail.

7. The lift mechanism of claim 6, wherein the distance adjustment structure comprises:

the adjusting block is arranged in a moving way along the direction approaching to or separating from the guide track, and the rollers of the roller group are arranged on the adjusting block;

the sliding groove accommodates the adjusting block and is used for sliding the adjusting block;

the pushing piece pushes the adjusting block to slide.

8. The lifting mechanism as claimed in claim 7, wherein the adjusting block is connected to the chute by a connector and is provided with a bar-shaped hole through which the connector passes and is relatively displaced.

9. The lifting mechanism according to claim 7, wherein the adjusting block is provided with a pushing protrusion, a fixed block opposite to the pushing protrusion is arranged in the chute, and the pushing member is telescopically arranged on the fixed block.

10. A transport vehicle comprising a vehicle body and a lifting mechanism according to any one of claims 1-9.