CN113247559A

CN113247559A - Gravity power and free chain system

Info

Publication number: CN113247559A
Application number: CN202110615543.4A
Authority: CN
Inventors: 任玉峰; 张瑞; 吴传刚
Original assignee: Anhui Juyi Technology Co Ltd
Current assignee: Anhui Juyi Technology Co Ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2021-08-13

Abstract

The invention discloses a gravity accumulation and release chain system which comprises a plurality of trolley trays, a lifting mechanism and a double-layer track conveying mechanism, wherein the upper layer track and the lower layer track of the double-layer track conveying mechanism are in an inclined state so that the trolley trays are conveyed from a high side to a low side by virtue of self gravity, and the low side end of the lower layer track and the high side end of the upper layer track are arranged on the same side; the lifting mechanism comprises a vertical frame, a supporting platform capable of lifting and moving on the vertical frame and a supporting platform lifting mechanism, wherein the supporting platform comprises a tray clamp, a clamp cylinder and a thrust cylinder, the lower layer of track is used for caching the belt tray, a stopper is arranged at the lower side end of the lower layer of track, the stopper releases one trolley tray at a time, the released belt tray enters the tray clamp and is clamped by the clamp cylinder, and the workpiece on the belt tray is extracted when the belt tray is lifted to a second working position along with the supporting platform. The system can replace a motor-driven chain accumulating and releasing system, and realizes the belt piece caching and accurate releasing of the trolley tray.

Description

Gravity power and free chain system

Technical Field

The invention relates to a power and free chain system, in particular to a gravity power and free chain system.

Background

The accumulation and release chain system is generally used as workpiece conveying equipment in a white body main line or a side wall line welding line.

In the prior art, the accumulation and release chain system is driven by the power of a motor and is controlled by a program so as to ensure the normal operation of equipment, and because the system structure is complex and the process is complex, the investment cost is high, and the traditional accumulation and release conveyor can not meet the production requirement gradually.

Therefore, there is a need to provide a new power and free chain system to replace the existing motor-driven power and free chain system.

Disclosure of Invention

The invention aims to provide a gravity stacking and releasing chain system, which is used for stacking and releasing workpieces under the action of unpowered gravity.

The invention provides a gravity accumulation and release chain system, which comprises a plurality of trolley trays, a lifting mechanism and a double-layer track conveying mechanism, wherein the double-layer track conveying mechanism comprises a rack, a lower-layer track and an upper-layer track, the upper-layer track and the lower-layer track are both in an inclined state so that the trolley trays are conveyed from a high side to a low side by means of self gravity, and the low-side end of the lower-layer track and the high-side end of the upper-layer track are arranged on the same side; the lifting mechanism comprises a vertical frame, a supporting platform and a supporting platform lifting mechanism, wherein the supporting platform can be lifted and moved on the vertical frame, the supporting platform comprises a tray clamp, a clamp cylinder and a thrust cylinder, the supporting platform is provided with a first working position connected with the lower side end of the lower-layer track and a second working position connected with the high side end of the upper-layer track during working, the lower-layer track is used for caching a belt tray, a stopper is arranged at the lower side end of the lower-layer track, one trolley tray is released by the stopper each time, the released belt tray enters the tray clamp and is clamped by the clamp cylinder, the upper workpiece of the belt tray is extracted when the belt tray is lifted to the second working position along with the supporting platform, and then the clamp cylinder releases an empty tray and pushes the empty tray to the upper-layer track through the thrust cylinder.

The gravity power and free chain system can replace a motor-driven power and free chain system, is simple in structure, reliable in action, accurate in releasing, accurate in positioning and low in manufacturing cost, and realizes belt piece caching of a trolley tray. The motor is not needed, the program control is reduced, the instability of the program is reduced, and the production beat is saved.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of an unpowered gravity power and free chain system of the present invention;

FIG. 2 is a schematic view of the structure of the dolly tray of the invention;

FIG. 3 is a schematic structural diagram of the lifting mechanism of the present invention;

FIG. 4 is a schematic structural diagram of a pallet in the lifting mechanism of the present invention;

FIG. 5 is a schematic view of a double-deck rail transport mechanism of the present invention;

FIG. 6 is a schematic structural diagram of a stopper in the double-deck track conveying mechanism according to the present invention;

FIG. 7 is a schematic view showing a state where a pallet and a workpiece of the cart reach a lower stage of the elevating mechanism according to the present invention; and

FIG. 8 is a schematic view showing a state where the pallet and the workpiece of the cart reach the upper layer of the elevating mechanism according to the present invention.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1-8 illustrate some embodiments according to the invention.

With reference to fig. 1 to 8, the gravity accumulation and release chain system of the present invention includes a plurality of trolley trays 1, a lifting mechanism 2, and a double-layer track conveying mechanism 3.

The double-layer track conveying mechanism 3 comprises an upper-layer track 32, a lower-layer track 35 and a rack 42, wherein the upper-layer track and the lower-layer track are supported on the rack and are in inclined states so that the trolley tray 1 is conveyed from a high side to a low side by means of self gravity, and the low side end of the lower-layer track and the high side end of the upper-layer track are arranged on the same side.

The lower layer track 35 is used for caching the tape element tray, the lower side end of the lower layer track 35 is provided with a stopper 34 and a tray release detection switch 33, and the stopper 34 releases one trolley tray 1 at a time. The released trolley tray 1 slides into the lifting mechanism 2.

The high side end of the lower layer track 35 is a workpiece placing station, a tray guide 25 and a workpiece guide 26 are arranged on the station, wherein the tray guide 25 provides guidance for placing a trolley tray to an accurate position, and the tray guide 25 is a left baffle plate and a right baffle plate. The workpiece guide 26 provides guidance for the placement of the workpiece to a precise location, and the workpiece guide 26 is a tail gate disposed at the tail of the rail.

The high side section of the lower layer track 35 is further provided with a tray stop pin mechanism, which comprises a tray stop pin 28, a stop pin seat, a swing rod for driving the tray stop pin to move in a telescopic manner, and a handle 27, wherein the tray stop pin can be inserted into the trolley tray 1 when extending out, so as to stop the movement of the trolley tray 1 on the lower layer track 35.

The upper rail 32 is used for buffering empty trays, and the high-side end thereof is used for receiving empty trays released from the elevating mechanism 2. The bottom side end of which is provided with a tray stopper 29.

The lower rail 35 and the upper rail 32 are each constituted by a pair of rails (a first rail and a second rail), which are preferably aluminum profile rails. It has a guide groove 32a opened laterally, the bottom of which is provided with a guide bar 14 extending in the length direction thereof, the guide groove and the guide bar 14 constituting a slide groove for only the guide wheel to roll back and forth. And one ends of the first guide rail and the second guide rail, which are far away from the lifting mechanism, are provided with top openings 32b, so that guide wheels of the trolley tray enter the sliding grooves of the tracks through the top openings from the upper parts of the tracks.

The stopper 34 disposed on the lower rail 35 includes a swing frame 341, a first stopping shaft 342 and a second stopping shaft 343 disposed at a distance from each other in the front-rear direction of the rail extension, and a swing frame driving cylinder 344 for alternately stopping the cart tray when the swing frame swings, wherein the swing frame driving cylinder is a holding cylinder having a holding bar to which the swing frame 341 is fixed.

The rack is provided with a track rotating mechanism 31 and a track angle adjusting mechanism 30, wherein the upper layer track is supported on the track rotating mechanism 31 and the track angle adjusting mechanism 30, and the lower layer track is also supported on the lower layer track. The track angle adjusting mechanism 30 adjusts the height of the track supported by the track angle adjusting mechanism, and the track rotates by taking the track rotating mechanism 31 as a fulcrum, so that the track inclination angle is adjusted.

The track rotating mechanism 31 is composed of a support plate and a hinged support, and the support plate is used for spacing and supporting the two guide rails. The rail angle adjusting mechanism 30 includes two support seats, each of which is provided with a plurality of adjusting screws, the two support seats are used for limiting and supporting the two guide rails one-to-one, and the adjusting screws are used for jacking up the guide rails, so that the height of the guide rails can be adjusted.

The lifting mechanism 2 is disposed at an end of the double-deck rail, and includes a lifting stand 24, a pallet 40 that can be moved up and down along the linear guide 23 on the lifting stand, and a pallet lifting mechanism. The pallet is capable of being moved up and down and has a first working position engaged with the lower side end of the lower track 35 and a second working position engaged with the upper side end of the upper track 32.

The pallet 40 includes a pallet table 36, a pallet clamp 37, a clamp cylinder 13, and a thrust cylinder 17. The pallet clamp includes a clamp rail 38, a first side locating block 39 and a second side clamp locating block 41. The clamp track is a short section track, the track structure of the clamp track is the same as that of the upper and lower layers of tracks, and the track length is suitable for stably placing a trolley tray.

The trolley tray cannot continue to advance along the clamp track 38 when the first side locating block 39 contacts the trolley tray.

The clamp cylinder 13 is a holding cylinder which is provided with a holding pole capable of being turned over, the second side clamping positioning block 41 is fixedly connected to the holding pole, and the holding pole is provided with a holding state and a downward turning open state.

When the holding pole is in a holding state, the second side clamping positioning block is in contact with the trolley tray, and the trolley tray cannot retreat along the clamp track. When the holding pole is in a downward turning open state, the trolley tray can enter/exit the clamp track from the front end of the clamp track, and when the trolley tray needs to exit the clamp track, the thrust cylinder 17 pushes the trolley tray to enter the upper track from the end part of the upper track.

The saddle jacking mechanism comprises a jacking cylinder 12, a chain wheel 18 and a transmission chain 43, wherein the chain wheel 18 is arranged on a cylinder rod of the jacking cylinder 12 and driven to lift by the jacking cylinder 12, the transmission chain is wound on the chain wheel 18 in an inverted U shape, one end of the chain is connected with the saddle, and the other end of the chain is connected with the lifting vertical frame 24. When the cylinder rod of the jacking cylinder 12 extends out, the supporting platform moves up and down by twice of the stroke of the cylinder rod, and the lifting speed is high.

The pallet is also provided with a pallet in-place detection switch 15 and a laser detection switch 19 for workpiece detection.

The trolley tray 1 comprises a tray frame 1a, a first wheel frame 1b, a second wheel frame 1c and a V-shaped limiting block 5, wherein a pair of V-shaped guide wheels 7 are arranged on the first wheel frame, and a pair of flat guide wheels 10 are arranged on the second wheel frame.

The first wheel frame and the second wheel frame are arranged on the inner side surfaces of the first guide rail and the second guide rail, the pair of V-shaped guide wheels 7 are arranged on the first wheel frame in tandem along the extending direction of the rails, the pair of flat guide wheels 10 are arranged on the second wheel frame in tandem along the extending direction of the rails, and the tray frame crosses the first guide rail and the second guide rail above the first guide rail and the second guide rail and is fixedly connected with the first wheel frame and the second wheel frame.

The trolley tray 1 is also provided with a pair of nylon handles 8 or lifting hooks for lifting the trolley tray.

The trolley tray is also provided with a workpiece positioning structure, the workpiece positioning structure is different according to the shape of a workpiece, in the example shown in the figure, the workpiece 50 is corrugated, and the corresponding workpiece positioning structure comprises workpiece supporting blocks 6a-6d and

workpiece positioning pins

4a and 4 b.

The workflow of the present invention is explained below.

As shown in fig. 1, the unpowered gravity power and free chain system is composed of a trolley tray 1, a lifting mechanism 2 and a double-layer track conveying mechanism 3, after the lifting mechanism 2 is adjusted in a falling position, a track angle adjusting mechanism 30 can be adjusted to enable the double-layer track conveying mechanism 3 to form a certain angle (between 1 and 5 degrees) with the ground, and the trolley tray 1 can roll by gravity.

The lower layer track 35 caches the tape tray, and the upper layer track 32 caches the empty tray; the elevating mechanism 2 raises the tape pallet from a lower position to a higher position, and the stopper 34 releases one tape pallet at a time by the feedback of the presence or absence of a signal from the pallet release detection switch 33.

As shown in fig. 2, the workpiece positioning pin 4 and the workpiece supporting block 6 on the trolley pallet 1 can ensure that the workpiece can play a role in supporting and positioning in the rolling process of the V-shaped guide wheel 7 and the flat guide wheel 10, and the V-shaped limiting block 5 plays a role in positioning the pallet when reaching the lifting mechanism 2.

As shown in fig. 3 and 4, when the belt pallet reaches the first working position of the pallet from the lower-layer track 35, the pallet-in-place detection switch 15 has a signal, the clasping mechanism 13 clamps the belt pallet, the pallet lifts the belt pallet to a high position under the action of the lifting cylinder 12, the lifting mechanism limit 16 blocks the cylinder to advance at the moment, the lifting mechanism rises to the-place switch 20 has a signal, if the workpiece detection switch 19 has a signal, the gripper takes a workpiece, otherwise, the clamp cylinder 13 is opened, the thrust cylinder 17 pushes the empty pallet to roll on the guide rod 14, and the empty pallet enters the upper-layer track 32 and stops contacting with the pallet block 29 or stopping by the previous empty pallet.

As shown in fig. 5 and 6, the operator takes out the empty pallet from the upper rail 32 by the nylon handle 8 or the hook, puts it down to the lower rail 35 with the aid of the pallet guide 25, then takes the work from the material frame, puts the plate member onto the empty pallet by means of the work guide 26, moves the handle 27, lowers the pallet stopper pin 28, releases the tape pallet, and the tape pallet runs to the stopper 34 at the lower rail 35 or is stopped by the previous tape pallet stopper.

As shown in fig. 7 and 8, the pallet carriage and the workpiece reach the upper and lower structures of the lifting mechanism.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The gravity power and free chain system is characterized by comprising a plurality of trolley trays, a lifting mechanism and a double-layer track conveying mechanism, wherein the double-layer track conveying mechanism

The double-layer track conveying mechanism comprises a rack, a lower-layer track and an upper-layer track, wherein the upper-layer track and the lower-layer track are in an inclined state so that a trolley tray is conveyed from a high side to a low side by means of self-gravity, and the low side end of the lower-layer track and the high side end of the upper-layer track are arranged on the same side;

the lifting mechanism comprises a vertical frame, a supporting platform capable of lifting and moving on the vertical frame and a supporting platform lifting mechanism, the supporting platform comprises a tray clamp, a clamp cylinder and a thrust cylinder, wherein the supporting platform is provided with a first working position connected with the lower side end of the lower-layer track and a second working position connected with the high side end of the upper-layer track when working,

the lower-layer track is used for caching the strip tray, a stopper is arranged at the lower side end of the lower-layer track, the stopper releases one trolley tray at a time, the released strip tray enters a tray clamp and is clamped by a clamp cylinder, workpieces on the strip tray are extracted when the strip tray is lifted to a second working position along with the supporting platform, and then the clamp cylinder releases an empty tray and pushes the empty tray to the upper-layer track through a thrust cylinder.

2. The gravity power and free chain system of claim 1, wherein the trolley pallet comprises a pallet frame, a first wheel frame, and a second wheel frame, wherein the first wheel frame is provided with a pair of V-shaped guide wheels, and the second wheel frame is provided with a pair of flat guide wheels.

3. The gravity stacking and releasing chain system according to claim 2, wherein the upper/lower rail comprises a first rail and a second rail, each of the first rail and the second rail having a sliding groove with a lateral opening, wherein a top opening is provided at one end of the first rail and the second rail away from the lifting mechanism, and the trolley tray can be separated from the upper/lower rail through the top opening.

4. The gravity accumulation chain system according to claim 2, wherein a rail rotation mechanism and a rail angle adjustment mechanism are provided on the frame, wherein the upper rail is supported on the rail rotation mechanism and the rail angle adjustment mechanism, and the inclination angle thereof is adjusted by the rail angle adjustment mechanism.

5. The gravity stacking and releasing chain system according to claim 3, wherein the tray clamp comprises a clamp rail, a first side positioning block and a second side clamping positioning block, wherein the clamp cylinder is a holding cylinder, the second side clamping positioning block is driven by the holding cylinder, the holding cylinder has a holding state for holding the trolley tray and a downward-turning open state, and the trolley tray can freely enter and exit the clamp rail in the downward-turning open state.

6. The gravity power and free chain system according to claim 1, wherein the supporting platform lifting mechanism comprises a lifting cylinder, a chain wheel and a transmission chain, wherein the chain wheel is driven by the lifting cylinder to lift, the transmission chain is hung on the chain wheel, one end of the chain is connected with the supporting platform, and the other end of the chain is connected with the vertical frame.

7. The gravity accumulation chain system of claim 1, wherein the stopper comprises a swing frame, first and second stop shafts spaced back and forth along the track extension direction, and a swing frame drive cylinder, wherein both the first and second stop shafts alternately stop the cart tray.

8. The gravity power and free chain system according to claim 1, wherein the pallet is provided with a pallet in-position detection switch and a laser detection switch for workpiece detection.

9. The gravity accumulation chain system according to claim 1, wherein the first and second rails of the upper/lower tracks are aluminum profile rails comprising profile bodies and guide bars disposed in the profile body lateral guide grooves.

10. The gravity stacking and releasing chain system according to claim 1, wherein a tray pin blocking mechanism is arranged at the high side end of the lower layer track, and comprises a tray blocking pin, a pin blocking seat, a swing rod for driving the tray blocking pin to extend and retract, and a handle, wherein the tray blocking pin is used for blocking a trolley tray on the lower layer track when the tray blocking pin extends out.