CN210705245U

CN210705245U - Turnover device

Info

Publication number: CN210705245U
Application number: CN201920941055.0U
Authority: CN
Inventors: 傅暖豪
Original assignee: Foshan Sanxie Intelligent Technology Co ltd
Current assignee: Foshan Sanxie Intelligent Technology Co ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-06-09
Anticipated expiration: 2029-06-20

Abstract

The utility model discloses a turnover device, wherein a mould with a green body is clamped on a mould clamp of a mould frame, two clamping blocks are respectively butted with two notches, a guide driving unit drives a guide sleeve to rotate until one end of a guide channel close to a guide stop block can be butted with the notches, meanwhile, the turnover driving mechanism drives the rotating sleeve to rotate until the outer end of one of the rotating clamping grooves is butted with the notch, the clamping block enters the notch from top to bottom and enters the lower end of the other rotating clamping groove after passing through the rotating clamping groove butted with the notch, meanwhile, the two turning rollers enter the turning track through the guide channel, the turning driving mechanism drives the rotating sleeve to rotate, the two turning rollers are driven to slide along the turning track by the clamping of the rotating clamping groove and the clamping block, thereby drive the upset of mould frame, and then realize the upset of mould frame, be automatic the upset of realizing the mould. The utility model is used for body among the pottery slip casting process of falling thick liquid.

Description

Turnover device

Technical Field

The utility model relates to a ceramic moulding equipment's field, in particular to turning device.

Background

The modern daily ceramic comprises the following general production processes: the method comprises the steps of grouting a mould, forming, drying, pouring slurry and forming a finished product, wherein the common ceramic slurry is filled in a cavity of a gypsum mould, the gypsum mould is formed through the mould, a layer of ceramic slurry is adsorbed on the inner wall of the gypsum mould after drying, the mould is turned over to pour out redundant slurry, the gypsum mould continuously adsorbs water in the ceramic slurry, a ceramic blank body with certain strength is gradually formed in the gypsum mould, in the slurry pouring process, the turned mould needs to be turned around after the slurry pouring is finished, so that the mould is restored to the original state, and the blank body is taken out of the mould. The manual grout pouring labor intensity is high, the efficiency is low, the grout pouring time and the grout pouring speed are not uniform, the thickness of the bottle blank after grout suction is easily inconsistent, the phenomenon that the mold drops is easily caused, the size of the mold is correspondingly increased when a large-size ceramic blank is produced, the manual grout pouring labor intensity is further increased, and the requirement for large-batch production cannot be met.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the turnover device is provided, and turnover of the die can be automatically achieved.

The utility model provides a solution of its technical problem is:

a turnover device comprises two turnover mechanisms which are oppositely arranged at the left and the right, a turnover driving mechanism and a die frame;

the turnover mechanism comprises a mounting base and a fixed cylinder fixedly mounted on the mounting base, wherein the axis of the fixed cylinder extends leftwards and rightwards, a notch is formed in the top of the inner end of the fixed cylinder, a rotating sleeve and a guide sleeve are mounted in the fixed cylinder, the rotating sleeve and the guide sleeve are coaxially arranged with the fixed cylinder, the guide sleeve is rotatably mounted in the fixed cylinder, two semicircular guide plate blocks are connected to the inner end of the guide sleeve, the two guide plate blocks are arranged in central symmetry relative to the axis of the guide sleeve, the two guide plate blocks form a circular structure coaxially arranged with the guide sleeve, a guide channel is arranged between the two guide plate blocks, the guide channel passes through the axis of the guide sleeve, the outer peripheral walls of the two guide plate blocks and the inner peripheral wall of the fixed cylinder form an annular turnover track, and guide stop blocks are arranged on two sides of one end of the guide channel, the guide stop block is fixedly connected with the outer peripheral wall of the guide plate block, the guide stop block extends to the inner peripheral wall of the fixed cylinder along the guide channel, the outer end of the guide sleeve is in transmission connection with a guide driving unit, the guide driving unit can drive the guide sleeve to rotate, one end, close to the guide stop block, of the guide channel can be in butt joint with the notch, the other end of the guide channel is communicated with the turnover track, the rotary sleeve is rotatably arranged in the fixed cylinder, the inner end of the rotary sleeve is connected with two rotary blocks, the two rotary blocks are arranged in central symmetry relative to the axis of the rotary sleeve, the two rotary blocks are arranged on one sides, far away from the inner end of the fixed cylinder, of the two guide plate blocks, one side, close to the inner end of the fixed cylinder, of the rotary blocks is provided with rotary clamping grooves, the rotary clamping grooves on the two, the rotary clamping groove extends outwards to the inner peripheral wall of the fixed cylinder along the radial direction of the rotary sleeve, a transmission assembly is connected to the rear end of the rotary sleeve in a transmission mode, the turnover driving mechanism is respectively connected with the transmission assemblies of the two turnover mechanisms in a transmission mode, the turnover driving mechanism drives the rotary sleeve to rotate through the transmission assembly, the rotary sleeve drives the two rotary blocks to rotate, and the outer end of the rotary clamping groove can be in butt joint with the notch;

the die frame is arranged between the two fixed cylinders in a left-right extending manner, a clamping block and two turning rollers are connected to the left end and the right end of the die frame respectively, the clamping block is matched with the turning clamping groove and can be clamped with the turning clamping groove, the clamping block is fixedly connected with the end face of the die frame, the two turning rollers are respectively arranged on the front side and the rear side of the clamping block, the turning rollers are rotationally connected with the end face of the die frame, the axis of the turning rollers is arranged in a left-right extending manner, the axes of the two turning rollers are arranged on the same circular arc line, a plurality of die clamps are arranged on the die frame, the plurality of die clamps are arranged on the die frame in a left-right spaced manner, when the notch is butted with the guide channel and one of the turning clamping grooves, the clamping block can enter the notch from top to bottom and enter the lower end of the other turning clamping groove after passing through the turning clamping groove butted with the notch, simultaneously two upset gyro wheels enter into the upset track through the direction passageway rotate telescopic rotation down, come to drive two upset gyro wheels through rotating draw-in groove and joint piece card and slide along the upset track to drive the mould frame upset, simultaneously the guide sleeve rotates toward same direction, makes two direction dogs rotate to the side of breach, makes upset track and breach intercommunication.

As a further improvement of the above scheme, the transmission assembly includes a transmission seat installed on the fixed cylinder, a worm fixedly installed on the worm wheel on the rear end of the rotating sleeve and a worm rotatably installed on the transmission seat, the worm is engaged with the worm wheel and connected, the turnover driving mechanism includes a turnover motor and two first transmission gear boxes, the two first transmission gear boxes are respectively installed on the two installation bases, a first transmission shaft is connected between the two first transmission gear boxes, the two first transmission gear boxes are respectively connected with the two worm drives, and the turnover motor is in transmission connection with one of the first transmission gear boxes.

As a further improvement of the above scheme, the guide driving unit comprises a guide driving cylinder, one end of the guide driving cylinder is hinged to the mounting base, the other end of the guide driving cylinder is hinged to the outer end face of the guide sleeve, and the guide driving cylinder can drive the guide sleeve to rotate.

As a further improvement of the above scheme, the bottom surface of the outer end of the rotary clamping groove is provided with an elastic limiting block, and the elastic limiting block can be abutted against the clamping block, so that the elastic limiting block plays a limiting role in limiting the clamping block.

As a further improvement of the above scheme, the lifting device further comprises a lifting mechanism, the lifting mechanism is arranged at the front side or the rear side of the turnover mechanism, the lifting mechanism comprises an installation base extending leftwards and rightwards and a lifting driving assembly arranged on the installation base, the left end and the right end of the installation base are both provided with lifting assemblies, the two lifting assemblies are symmetrically arranged leftwards and rightwards, the lifting assemblies comprise a guide rail seat, a driving seat, a lifting frame and a lifting transmission unit, the guide rail seat and the driving seat are both vertically arranged, a lifting guide rail vertically arranged is arranged on the guide rail seat, the lifting frame is arranged between two fixed cylinders in the front and back direction, the front end or the rear end of the lifting frame is connected with a sliding block matched with the lifting guide rail, the lifting frame is connected with the lifting guide rail in a sliding manner through the lifting guide rail, and the lifting transmission unit is, the lifting drive assembly can drive the two lifting frames to move up and down through the two lifting drive units.

As a further improvement of the above scheme, the lifting transmission unit comprises a transmission screw rod which is vertically arranged, the transmission screw rod is rotatably installed on the driving seat, a lifting nut which is in threaded connection with the transmission screw rod is fixedly installed at the front end or the rear end of the lifting frame, and the lifting driving assembly is in transmission connection with the two transmission screw rods respectively.

As a further improvement of the scheme, the lifting driving assembly comprises a lifting motor and two second transmission gear boxes, the two second transmission gear boxes are fixedly installed at the left end and the right end of the installation base respectively, the two second transmission gear boxes are in transmission connection with the lower ends of the two transmission screw rods respectively, a second transmission shaft is connected between the two second transmission gear boxes, and the lifting motor is in transmission connection with one of the second transmission gear boxes.

The utility model has the advantages that: when in use, a die with a green body is clamped on a die clamp of a die frame, the die frame is transported to the upper part of two fixed cylinders, two clamping blocks are respectively butted with two notches, a guide driving unit drives a guide sleeve to rotate until one end of a guide channel close to a guide stop block can be butted with the notches, simultaneously an overturning driving mechanism drives the rotating sleeve to rotate until the outer end of one rotating clamping groove is butted with the notch, the die frame moves downwards, the clamping blocks enter the notches from top to bottom and enter the lower end of the other rotating clamping groove after passing through the rotating clamping groove butted with the notches, simultaneously two overturning rollers enter an overturning track through the guide channel, an overturning driving mechanism drives the rotating sleeve to rotate, and the two overturning rollers are driven to slide along the overturning track by clamping the rotating clamping groove and the clamping blocks so as to drive the die frame to overturn, the drive of direction drive unit simultaneously the guide sleeve is toward same direction rotation, makes two direction dogs rotate to the side of breach, makes upset track and breach intercommunication, when the joint piece slides to the breach, 180 degrees of mould frame upset, upwards remove the mould frame again for the joint piece shifts out from the breach, and then realizes the upset of mould frame, and the upset of mould is realized to the automatic upset that realizes the mould, accomplishes the process that the body is whitewashed, and the direction dog plays the effect that blocks the location to the joint piece, and one comes when the mould frame descends, and the joint piece of being convenient for enters into the direction passageway from the breach, and two come when promoting the mould frame and shift out up, the joint piece of being convenient for shifts out from the upset track through the breach.

The utility model is used for body among the pottery slip casting process of falling thick liquid.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a schematic structural view of the inner side of the turnover mechanism according to the embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along section A-A of FIG. 1;

fig. 3 is a schematic structural diagram of the outer side of the turnover mechanism according to the embodiment of the present invention;

fig. 4 is a schematic front view of the assembly of two turnover mechanisms according to the embodiment of the present invention;

fig. 5 is a schematic front view of the lifting mechanism according to the embodiment of the present invention;

fig. 6 is a schematic top view of the lifting mechanism assembled with two turnover mechanisms according to the embodiment of the present invention;

fig. 7 is a schematic top view of a mold frame according to an embodiment of the present invention.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. The utility model provides an each technical feature can the interactive combination under the prerequisite of conflict each other.

With reference to fig. 1 to 7, this is an embodiment of the invention, in particular:

a turnover device comprises two turnover mechanisms 100 which are oppositely arranged left and right, a turnover driving mechanism and a die frame 200;

the turnover mechanism 100 comprises an installation base 110 and a fixed cylinder 120 fixedly installed on the installation base 110, wherein the axis of the fixed cylinder 120 extends left and right, a notch 121 is formed at the top of the inner end of the fixed cylinder 120, a rotating sleeve 130 and a guide sleeve 140 are installed in the fixed cylinder 120, the rotating sleeve 130 and the guide sleeve 140 are both coaxially arranged with the fixed cylinder 120, the guide sleeve 140 is rotatably installed in the fixed cylinder 120, two semicircular guide plates 141 are connected to the inner end of the guide sleeve 140, the two guide plates 141 are arranged in central symmetry with respect to the axis of the guide sleeve 140, the two guide plates 141 form a circular structure coaxially arranged with the guide sleeve 140, a guide channel 142 is arranged between the two guide plates 141, the guide channel 142 passes through the axis of the guide sleeve 140, the outer peripheral walls of the two guide plates 141 and the inner peripheral wall of the fixed cylinder 120 form an annular turnover track 143, two sides of one end of the guide channel 142 are respectively provided with a guide stopper 144, the guide stoppers 144 are fixedly connected with the outer peripheral wall of the guide plate blocks 141, the guide stoppers 144 extend to the inner peripheral wall of the fixed cylinder 120 along the guide channel 142, the outer end of the guide sleeve 140 is in transmission connection with a guide driving unit, the guide driving unit can drive the guide sleeve 140 to rotate, one end of the guide channel 142 close to the guide stopper 144 can be butted with the notch 121, the other end of the guide channel 142 is communicated with the turning track 143, the rotating sleeve 130 is rotatably installed in the fixed cylinder 120, the inner end of the rotating sleeve 130 is connected with two rotating blocks 131, the two rotating blocks 131 are arranged in central symmetry about the axis of the rotating sleeve 130, the two rotating blocks 131 are arranged on one side of the two guide plate blocks 141 far away from the inner end of the fixed cylinder 120, one side of the rotating blocks 131 close to the inner end of the fixed cylinder 120, the rotary clamping grooves 132 on the two rotary blocks 131 are arranged on the same radial line, the rotary clamping grooves 132 on the two rotary blocks 131 are mutually communicated, the rotary clamping grooves 132 radially extend outwards to the inner peripheral wall of the fixed cylinder 120 along the rotary sleeve 130, the rear end of the rotary sleeve 130 is in transmission connection with a transmission assembly, the turnover driving mechanism is in transmission connection with the transmission assemblies of the two turnover mechanisms 100 respectively, the turnover driving mechanism drives the rotary sleeve 130 to rotate through the transmission assembly, so that the rotary sleeve 130 drives the two rotary blocks 131 to rotate, and the outer ends of the rotary clamping grooves 132 can be in butt joint with the notches 121;

the die holder 200 extends left and right between the two fixed cylinders 120, the left end and the right end of the die holder 200 are both connected with a joint block 210 and two turning rollers 220, the joint block 210 is matched with the turning clamping groove 132 and can be clamped with the turning clamping groove 132, the joint block 210 is fixedly connected with the end surface of the die holder 200, the two turning rollers 220 are respectively arranged at the front side and the rear side of the joint block 210, the turning rollers 220 are rotationally connected with the end surface of the die holder 200, the axis of the turning rollers 220 extends left and right, the axes of the two turning rollers 220 are arranged on the same circular arc line, a plurality of die clamps 230 are arranged on the die holder 200 at intervals, when the gap 121 is butted with the guide channel 142 and one of the turning clamping grooves 132, the joint block 210 can enter the gap 121 from top to bottom, and enter into the lower extreme of another rotation draw-in groove 132 behind the rotation draw-in groove 132 with breach 121 butt joint, two upset gyro wheels 220 enter into upset track 143 through direction passageway 142 simultaneously under the rotation of rotating sleeve 130, drive two upset gyro wheels 220 and slide along upset track 143 through rotating draw-in groove 132 and joint piece 210 joint to drive the upset of mould frame 200, simultaneously guide sleeve 140 rotates toward same direction, makes two direction dogs 144 rotate to the side of breach 121, makes upset track 143 and breach 121 communicate.

When in use, a mold with a green body is clamped on the mold clamp 230 of the mold frame 200, the mold frame 200 is transported to the upper part of the two fixed cylinders 120, the two clamping blocks 210 are respectively butted with the two notches 121, the guide driving unit drives the guide sleeve 140 to rotate until one end of the guide channel 142 close to the guide stop block 144 can be butted with the notches 121, the turnover driving mechanism drives the rotating sleeve 130 to rotate until the outer end of one of the rotating clamping grooves 132 is butted with the notch 121, the mold frame 200 moves downwards, the clamping blocks 210 enter the notches 121 from top to bottom and enter the lower end of the other rotating clamping groove 132 after passing through the rotating clamping groove 132 butted with the notches 121, meanwhile, the two turnover rollers 220 enter the turnover rail 143 through the guide channel 142, the turnover driving mechanism drives the rotating sleeve 130 to rotate, and the clamping blocks 210 are clamped with the rotating clamping grooves 132 to drive the two turnover rollers 220 to slide along the turnover rail 143, the size of the turning roller 220 is matched with the turning rail 143, so that the die frame 200 is driven to turn, meanwhile, the guide driving unit drives the guide sleeve 140 to rotate in the same direction, the two guide stoppers 144 are enabled to rotate to the side of the notch 121, the turning rail 143 is communicated with the notch 121, when the clamping block 210 slides to the notch 121, the die frame 200 turns for 180 degrees, the die frame 200 is moved upwards, the clamping block 210 is moved out of the notch 121, the die frame 200 is further turned, the turning of the die is automatically achieved, the blank body slurry pouring process is completed, the guide stoppers 144 play a role in blocking and positioning the clamping block 210, and when the die frame 200 descends, the clamping block 210 is convenient to enter the guide channel 142 from the notch 121, and when the die frame 200 is pushed to move upwards, the clamping block 210 is convenient to move out of the turning rail 143 through the notch 121.

Further as a preferred embodiment, the transmission assembly includes a transmission seat 400 installed on the fixed cylinder 120, a worm wheel 410 fixedly installed on the rear end of the rotating sleeve 130, and a worm 420 rotatably installed on the transmission seat 400, the worm 420 is engaged with the worm wheel 410, the turnover driving mechanism includes a turnover motor 430 and two first transmission gear boxes 440, the two first transmission gear boxes 440 are respectively installed on the two installation bases 110, a first transmission shaft 450 is connected between the two first transmission gear boxes 440, the two first transmission gear boxes 440 are respectively in transmission connection with the two worm wheels 420, and the turnover motor 430 is in transmission connection with one of the first transmission gear boxes 440. Through worm 420 and turbine 410 meshing transmission, improve and rotate sleeve 130 pivoted stability, also improve tilting mechanism's bearing capacity, drive two tilting mechanism synchronization motion through a upset motor 430, thereby improve the stability of mould frame 200 upset, avoid appearing empting the phenomenon, upset motor 430 is through driving one of them first transmission gear case 440, first transmission gear case 440 drives another first transmission gear case 440 through first transmission shaft 450, two first transmission gear case 440 drive corresponding worm 420 respectively and rotate, corresponding worm 420 drives corresponding rotation sleeve 130 through turbine 410 and rotates.

Further as a preferred embodiment, the guiding driving unit includes a guiding driving cylinder 300, one end of the guiding driving cylinder 300 is hinged to the mounting base 110, the other end of the guiding driving cylinder 300 is hinged to the outer end surface of the guiding sleeve 140, and the guiding driving cylinder 300 can drive the guiding sleeve 140 to rotate. The action stroke of the guide driving cylinder 300 is matched with the size of the notch 121, and the guide driving cylinder 300 can drive the guide sleeve 140 to rotate in a reciprocating mode within the moving range, so that the two guide stoppers 144 can rotate to the side of the notch 121, and one end, close to the guide stoppers 144, of the guide channel 142 can be abutted to the notch 121.

Further as preferred embodiment, the bottom surface of the outer end of the rotary clamping groove 132 is provided with an elastic limiting block 133, and the elastic limiting block 133 can be abutted against the clamping block 210, so that the elastic limiting block 133 can limit the clamping block 210. Avoid joint piece 210 to rock at the in-process that removes, play stable effect, also avoid mould frame 200 to deviate from under inertial effect.

Further as a preferred embodiment, the lifting mechanism 500 is further included, the lifting mechanism 500 is disposed at the front side or the rear side of the turnover mechanism 100, the lifting mechanism 500 includes an installation base 510 extending left and right and a lifting driving assembly installed on the installation base 510, the lifting assemblies 520 are installed at the left end and the right end of the installation base 510, the two lifting assemblies 520 are symmetrically disposed left and right, the lifting assembly 520 includes a guide rail base 530, a driving base 540, a lifting frame 550 and a lifting transmission unit, the guide rail base 530 and the driving base 540 are both vertically disposed, the lifting rail base 530 is installed with a lifting rail 531 vertically disposed, the lifting frame 550 is disposed between the two fixed cylinders 120 in a front-back manner, a sliding block 551 matching with the lifting rail 531 is connected to the front end or the rear end of the lifting frame 550, the lifting frame 550 is slidably connected to the lifting rail 531 through a sliding block 551, the lifting transmission unit is arranged on the driving seat 540 and is in transmission connection with the lifting frame 550, the lifting driving assembly is in transmission connection with the two lifting transmission units respectively, and the lifting driving assembly can drive the two lifting frames 550 to move up and down through the two lifting transmission units. When the mold frame 200 enters from the notch 121, descends to the bottom of the turnover rail 143 and moves out from the notch 121 upwards, the mold frame 200 is driven to lift through the lifting mechanism 500, the two lifting frames 550 support the mold frame 200, and the lifting driving assembly drives the two lifting frames 550 to slide up and down along the two lifting guide rails 531 respectively through the two lifting transmission units.

Further as a preferred embodiment, the lifting transmission unit includes a transmission screw rod 560 vertically arranged, the transmission screw rod 560 is rotatably installed on the driving seat 540, a lifting nut 552 in threaded connection with the transmission screw rod 560 is fixedly installed at the front end or the rear end of the lifting frame 550, and the lifting driving assembly is in transmission connection with the two transmission screw rods 560 respectively. Through the screw transmission of the transmission screw rod 560 and the lifting nut 552, the lifting accuracy of the mold frame 200 is improved.

Further as a preferred embodiment, the lifting driving assembly includes a lifting motor 570 and two second transmission gear boxes 580, the two second transmission gear boxes 580 are respectively and fixedly installed at the left end and the right end of the installation base 510, the two second transmission gear boxes 580 are respectively in transmission connection with the lower ends of the two transmission screw rods 560, a second transmission shaft 590 is connected between the two second transmission gear boxes 580, and the lifting motor 570 is in transmission connection with one of the second transmission gear boxes 580. The two second transmission gear boxes 580 are driven by one lifting motor 570 to drive the corresponding transmission screw rod 560 to rotate, so that the two lifting frames 550 can synchronously act, the lifting stability of the die frame 200 is improved, and the phenomenon of dumping is avoided.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.

Claims

1. A turnover device is characterized in that: comprises two turnover mechanisms which are oppositely arranged at the left and the right, a turnover driving mechanism and a mould frame;

2. A turnover device as claimed in claim 1, characterized in that: the drive assembly is including installing transmission seat, the worm on the turbine of installing on the solid fixed cylinder, the rotatable installation transmission seat on rotating the sleeve rear end, the worm is connected with the turbine meshing, upset actuating mechanism includes an upset motor, two first transmission gear boxes, and two first transmission gear boxes are installed respectively on two mounting bases, are connected with first transmission shaft between two first transmission gear boxes, and two first transmission gear boxes are connected with two worm transmissions respectively, the upset motor is connected with the transmission of one of them first transmission gear box.

3. A turnover device as claimed in claim 1, characterized in that: the direction drive unit drives actuating cylinder including the direction, the direction drives one end that actuating cylinder is articulated with the mounting base, the direction drives the other end that actuating cylinder was articulated with guide sleeve's outer terminal surface, the direction drives actuating cylinder and can drive guide sleeve and rotate.

4. A turnover device as claimed in claim 1, characterized in that: the bottom surface of rotating the draw-in groove outer end is equipped with the elastic limiting block, the elastic limiting block can with joint piece butt for the elastic limiting block plays spacing effect to the joint piece.

5. A turnover device as claimed in claim 1, characterized in that: the lifting mechanism is arranged on the front side or the rear side of the turnover mechanism, the lifting mechanism comprises an installation base and a lifting driving assembly, the installation base is arranged in a left-right extending mode, the lifting driving assembly is arranged on the installation base, the lifting assemblies are arranged on the left end and the right end of the installation base in a left-right symmetrical mode, each lifting assembly comprises a guide rail seat, a driving seat, a lifting frame and a lifting transmission unit, the guide rail seats and the driving seats are vertically arranged, lifting guide rails are arranged on the guide rail seats in a vertical mode, the lifting frame is arranged between two fixed cylinders in a front-back mode, a sliding block matched with the lifting guide rails is connected to the front end or the rear end of the lifting frame, the lifting frame is connected with the lifting guide rails in a sliding mode through the sliding block, the lifting transmission unit is arranged on the driving seats, and the lifting transmission unit is connected with, the lifting driving assembly is in transmission connection with the two lifting transmission units respectively, and the lifting driving assembly can drive the two lifting frames to move up and down through the two lifting transmission units.

6. A turnover device as claimed in claim 5, characterized in that: the lifting drive unit comprises a vertically arranged drive screw rod, the drive screw rod is rotatably arranged on the drive seat, a lifting nut in threaded connection with the drive screw rod is fixedly arranged at the front end or the rear end of the lifting frame, and the lifting drive assembly is in transmission connection with the two drive screw rods respectively.

7. A turnover device as claimed in claim 6, characterized in that: the lifting driving assembly comprises a lifting motor and two second transmission gear boxes, the two second transmission gear boxes are fixedly mounted at the left end and the right end of the mounting base respectively, the two second transmission gear boxes are in transmission connection with the lower ends of the two transmission screw rods respectively, a second transmission shaft is connected between the two second transmission gear boxes, and the lifting motor is in transmission connection with one of the second transmission gear boxes.