CN110671395A

CN110671395A - Locking release mechanism, shallow and system of unloading

Info

Publication number: CN110671395A
Application number: CN201910650078.0A
Authority: CN
Inventors: 陈虎; 麦立宁; 赖小干; 金益; 陈碧云
Original assignee: Dongfeng Motor Co Ltd
Current assignee: Dongfeng Motor Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-18
Publication date: 2020-01-10
Anticipated expiration: 2039-07-18
Also published as: CN110671395B

Abstract

The invention discloses a locking and unlocking mechanism which comprises a trigger piece, a mounting bracket, an anti-retreating hook and a switching wheel, wherein the trigger piece is arranged on the mounting bracket; the trigger piece comprises a trigger part and a locking part, the trigger part is used for triggering the switching wheel to rotate, and the locking part is used for stopping the anti-withdrawing hook; the anti-back hook comprises a connecting end and a locking end, the connecting end is rotatably connected to the mounting bracket, and the locking end is used for acting with the locking part; the center of the switching wheel is rotationally connected to the mounting bracket; in the anti-backing process, the trigger piece triggers the switching wheel to rotate, and the switching wheel enables the locking end of the anti-backing hook to enter the locking part and keep locked; in the disengaging process, the trigger piece triggers the switching wheel to rotate again, and the switching wheel enables the locking end of the anti-backing hook to withdraw from the locking part and keeps unlocked. The invention also discloses a cart and a discharging system. The anti-retreat function in the unloading process can be realized.

Description

Locking release mechanism, shallow and system of unloading

Technical Field

The invention relates to the technical field of discharging devices, in particular to a locking and unlocking mechanism, a cart and a discharging system.

Background

The discharging system comprises a cart and a material rack. The material box is transferred by butting the cart and the material rack, and the material box slides into the slope raceway of the material rack from the slope raceway of the cart. However, in the process of docking the existing cart with the rack, a locking and unlocking mechanism is lacked. The cart is easily separated from the material rack, so that the material box cannot smoothly slide into the material rack.

Therefore, there is a need for a locking and unlocking mechanism, cart and discharge system that prevents the cart from backing up during transfer of a material cassette.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a locking and unlocking mechanism, a cart and a discharging system for preventing the cart from backing up in the process of transferring a material box.

The invention provides a locking and unlocking mechanism which comprises a trigger piece, a mounting bracket, an anti-retreating hook and a switching wheel, wherein the trigger piece is arranged on the mounting bracket;

the trigger piece comprises a trigger part and a locking part, the trigger part is used for triggering the switching wheel to rotate, and the locking part is used for stopping the anti-withdrawing hook;

the anti-back hook comprises a connecting end and a locking end, the connecting end is rotatably connected to the mounting bracket, and the locking end is used for acting with the locking part;

the center of the switching wheel is rotationally connected to the mounting bracket;

in the anti-backing process, the trigger piece triggers the switching wheel to rotate, and the switching wheel enables the locking end of the anti-backing hook to enter the locking part and keep locked;

in the disengaging process, the trigger piece triggers the switching wheel to rotate again, and the switching wheel enables the locking end of the anti-backing hook to withdraw from the locking part and keeps unlocked.

Further, the trigger piece also comprises a body, the trigger part is protruded from the body towards the switching wheel, and the locking part is a groove formed on the body.

Further, the anti-back hook further comprises a hook rod, the hook rod is connected with the locking end and the connecting end, and the switching wheel acts on the hook rod to drive the anti-back hook to enter or exit the locking portion.

Further, the switching wheel comprises a cam and a ratchet wheel, the cam and the ratchet wheel are coaxially and fixedly connected, the cam acts on the hook rod, and the ratchet wheel acts on the trigger piece.

Further, the cam includes a lifting surface and a lowering surface;

when the lifting surface is in contact with the hook rod, the locking end is separated from the locking part;

when the descending surface comes into contact with the hook lever, the locking end enters into the locking portion.

Further, the cam further comprises an entry point and an exit point, the entry point being located between one of the lifting surfaces and one of the lowering surfaces, the exit point being located between one of the lifting surfaces and the other of the lowering surfaces;

when the entry point is in contact with the hook rod, the locking end starts to enter the locking part, and after the cam rotates towards the trigger, the descending surface is in contact with the hook rod;

when the withdrawing point is in contact with the hook rod, the locking end begins to withdraw from the locking part, and after the cam rotates towards the trigger, the lifting surface is in contact with the hook rod.

Further, the hook rod is a straight rod, the lifting surface is a plane, and the descending surface is an arc-shaped surface protruding towards the hook rod.

Further, the ratchet wheel comprises a plurality of pawls, and the trigger part drives the ratchet wheel to rotate by pushing the pawls.

Further, the cam is a double cam, and the ratchet has four pawls.

Further, the cam is a triple cam, and the ratchet has six pawls.

The invention also provides a cart which comprises a frame, a first roller path arranged in the frame, a plurality of pulleys arranged at the bottom of the frame and the locking and unlocking mechanism, wherein the mounting bracket is arranged below the first roller path on the frame.

Furthermore, a lifting material stop mechanism is installed on the front side surface of the frame, and the trigger piece further comprises a guide surface;

when the roller way is in a disengaged state, the lifting stop mechanism blocks the front end of the first roller way;

in the retreating prevention process, the guide surface guides the lifting stop mechanism to descend below the front end of the first raceway.

Further, still install visualization mechanism on the frame, visualization mechanism is including visualization member, visualization cam and transmission shaft, visualization cam passes through the transmission shaft with switching wheel fixed connection, drive during the switching wheel rotation visualization cam rotates, visualization cam drives visualization member oscilaltion is used for the suggestion current to be in the off-state or prevent moving back the state.

The invention also provides a cart, which comprises a frame, a first roller path arranged in the frame and a plurality of pulleys arranged at the bottom of the frame, and is characterized by also comprising an installation support, an anti-back hook and a switching wheel;

the mounting bracket is mounted below the first roller path on the frame;

the anti-withdrawal hook comprises a connecting end and a locking end, and the connecting end is rotatably connected to the mounting bracket;

the center of the switching wheel is rotatably connected to the mounting bracket and is positioned below the anti-back hook, and the switching wheel is used for lifting or descending the locking end of the anti-back hook when rotating.

The invention also provides a discharging system, which comprises a material rack and the cart, wherein the material rack comprises a second raceway, the cart comprises any one of the above parts, the first raceway is used for being in butt joint with the second raceway, and the trigger part is arranged on the material rack.

After adopting above-mentioned technical scheme, have following beneficial effect:

the anti-backing device realizes the anti-backing through the combined action of the trigger piece, the switching wheel and the anti-backing hook. In the anti-backing process, the trigger piece triggers the switching wheel to rotate, and the switching wheel enables the locking end of the anti-backing hook to enter the locking part and keep locking; in the separation process, the trigger piece triggers the switching wheel again to rotate, and the switching wheel enables the locking end of the anti-backing hook to withdraw from the locking part and keep unlocking.

Drawings

The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:

FIG. 1 is a perspective view of a lock release mechanism in accordance with one embodiment of the present invention;

FIG. 2 is a perspective view of a cart in accordance with a second embodiment of the present invention;

FIG. 3 is a perspective view of a discharge system in a third embodiment of the present invention;

fig. 4 is a perspective view of a lifting striker of the cart in the second embodiment of the invention;

FIG. 5 is a perspective view of the visualization mechanism of the cart in accordance with the second embodiment of the present invention;

FIG. 6 is a schematic view of a lock release mechanism in a disengaged state according to one embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a discharge system in a disengaged state according to a third embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a lock release mechanism in a first entering state according to a first embodiment of the present invention;

fig. 9 is a schematic structural diagram of a discharging system in a first entering state in the third embodiment of the invention;

FIG. 10 is a schematic view of the lock release mechanism in a bottom-out position according to one embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a discharging system in a bottom-entering state in the third embodiment of the present invention;

FIG. 12 is a schematic structural view of another side of the discharging system in the bottom-entering state in the third embodiment of the invention;

FIG. 13 is a schematic structural view of a lock release mechanism in a retreat prevention state according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a discharge system in a retreat-preventing state in the third embodiment of the present invention;

FIG. 15 is a schematic structural view of another side face of the discharging system in the retreat preventing state in the third embodiment of the invention;

FIG. 16 is a schematic view of the lock release mechanism in a first retracted state in accordance with one embodiment of the present invention;

FIG. 17 is a schematic structural diagram of a discharging system in a first retraction state in the third embodiment of the present invention;

FIG. 18 is a schematic view of the lock release mechanism in a second retracted state in accordance with one embodiment of the present invention;

FIG. 19 is a schematic structural diagram of the discharge system in the second retracted state according to the third embodiment of the present invention;

FIG. 20 is a schematic structural view of the other side of the discharging system in the second retracted state in the third embodiment of the present invention;

FIG. 21 is a schematic structural view illustrating the lock release mechanism in a third retracted state according to a first embodiment of the present invention;

FIG. 22 is a schematic structural diagram of the discharging system in a third retreating state in the third embodiment of the present invention;

FIG. 23 is a schematic structural view illustrating the lock release mechanism in a fourth retracted state according to the first embodiment of the present invention;

FIG. 24 is a schematic structural diagram of a discharging system in a fourth retraction state in the third embodiment of the present invention;

FIG. 25 is a schematic structural view of a lock release mechanism in a disengaged state in the fourth embodiment of the present invention;

fig. 26 is a schematic structural view of the lock release mechanism in the first entry state in the fourth embodiment of the present invention;

fig. 27 is a schematic structural view of the lock release mechanism in the bottomed state in the fourth embodiment of the invention;

FIG. 28 is a schematic structural view of a lock release mechanism in a retreat prevention state in the fourth embodiment of the present invention;

FIG. 29 is a schematic structural view of a lock release mechanism in a first retracted state in the fourth embodiment of the present invention;

FIG. 30 is a schematic view of the lock release mechanism in the second retracted state in the fourth embodiment of the present invention;

FIG. 31 is a schematic structural view illustrating the lock release mechanism in a third retracted state according to the fourth embodiment of the present invention;

FIG. 32 is a schematic structural view illustrating the lock release mechanism in a fourth retracted state according to the fourth embodiment of the present invention;

FIG. 33 is a schematic view of a cam and ratchet arrangement according to a first embodiment of the present invention.

Reference symbol comparison table:

the locking and unlocking mechanism 10:

the trigger piece 1: trigger part 11, locking part 12, body 13 and guide surface 14

Mounting bracket 2

Anti-back hook 3: connecting end 31, locking end 32, hook rod 33

The switching wheel 4: cam 41, ratchet 42, lifting surface 411, lowering surface 412, entry point 413, exit point 414, pawl 421

The cart 100: frame 101, first raceway 102, pulley 103

The lifting stop mechanism 104: stop rod 1041, pressure rod 1042, connecting rod 1043 and return spring 1044

Visualization means 105: visualization lever 1051, visualization cam 1052, and drive shaft 1053

The material rack 200: second raceway 201

Material box 300

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings.

It is easily understood that according to the technical solution of the present invention, those skilled in the art can substitute various structures and implementation manners without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

The first embodiment is as follows:

referring to fig. 1, 6, 8, 10, 13, 16, 18 and 33, a locking and unlocking mechanism according to an embodiment is schematically illustrated.

As shown in fig. 1, the locking and unlocking mechanism 10 comprises a trigger 1, a mounting bracket 2, an anti-back hook 3 and a switching wheel 4;

the trigger piece 1 comprises a trigger part 11 and a locking part 12, wherein the trigger part 11 is used for triggering the switching wheel 4 to rotate, and the locking part 12 is used for stopping the anti-retreat hook 3;

the anti-back hook 3 comprises a connecting end 31 and a locking end 32, the connecting end 31 is rotatably connected to the mounting bracket 2, and the locking end 32 is used for acting with the locking part 12;

the center of the switching wheel 4 is rotationally connected to the mounting bracket 2;

in the anti-backing process, the trigger piece 1 triggers the switching wheel 4 to rotate, and the switching wheel 4 enables the locking end 32 of the anti-backing hook 3 to enter the locking part 12 and keep locking;

during the disengagement process, the trigger piece 1 triggers the switching wheel 4 to rotate again, and the switching wheel 4 enables the locking end 32 of the anti-backing hook 3 to withdraw from the locking part 12 and keeps unlocking.

The triggering part 1 is of an inverted trapezoid structure, the triggering part 11 is located on the right side of the body 13 and protrudes towards the switching wheel 4, and the shape of the triggering part is like an acute angle of the inverted trapezoid. The locking portion 12 is groove-shaped for interaction with the locking end 32 of the anti-backup hook 3.

The mounting bracket 2 is used for mounting the anti-back hook 3 and the switching wheel 4.

The connecting end 31 of the anti-back hook 3 is rotatably connected to the mounting bracket 2 and can rotate around the connecting center, and the connecting end 31 is connected with the mounting bracket 2 through a bearing. The locking end 32 is hook-shaped, and the locking end 32 can be rotated and enter the locking portion 12.

The switching wheel 4 is also mounted on the mounting bracket 2 and can rotate around the connection center, and the switching wheel 4 is positioned below the anti-back hook 3. The switching wheel 4 can rotate under the action of the trigger 1 and push the anti-retreat hook 3, so that the locking end 32 of the anti-retreat hook 3 is separated from the locking part 12 or enters the locking part 12.

In this embodiment, the anti-retreat is realized by the combined action of the trigger 1, the switching wheel 4 and the anti-retreat hook 3. In the anti-backing process, the trigger piece 1 triggers the switching wheel 4 to rotate, and the switching wheel 4 enables the locking end 32 of the anti-backing hook 3 to enter the locking part 12 and keep locking; during the disengagement process, the trigger piece 1 triggers the switching wheel 4 to rotate again, and the switching wheel 4 enables the locking end 32 of the anti-withdrawal hook 3 to withdraw from the locking part 12 and keeps unlocking.

Further, as shown in fig. 1, the anti-retreat hook 3 further includes a hook rod 33, the hook rod 33 connects the locking end 31 and the connecting end 32, and the switching wheel 4 acts on the hook rod 33 to drive the anti-retreat hook 3 into or out of the locking portion 12.

Further, as shown in fig. 1, the switching wheel 4 includes a cam 41 and a ratchet wheel 42, the cam 41 and the ratchet wheel 42 are coaxially and fixedly connected, the cam 41 acts on the hook lever 33, and the ratchet wheel 42 acts on the trigger 1.

In one embodiment, as shown in fig. 33, the cam 41 is a double cam and the ratchet 42 has four pawls. Each cycle of the double cam rotates 180 degrees, the ratchet rotates 90 degrees in a single time, and each cycle rotates twice.

Further, as shown in fig. 6 and 13, the cam 41 includes a lifting surface 411 and a lowering surface 412;

as shown in fig. 6, the distance of the lifting surface 411 from the rotation center of the cam 41 is greater than the distance of the lowering surface 412. Therefore, when the lifting surface 411 contacts the hook lever 33, the locking end 32 is lifted upward, and the locking end 32 is separated upward from the locking portion 12;

as shown in fig. 13, when the falling surface 412 comes into contact with the hook lever 33, the locking end 32 enters downward into the locking portion 12.

In the first embodiment, since the cam 41 is a double cam, two lifting surfaces 411 and two lowering surfaces 412 are arranged on the cam 41 at intervals.

Further, as shown in fig. 10 and 18, the cam 41 further includes an entry point 413 and an exit point 414, the entry point 413 being located between a lifting surface 411 and a lowering surface 412, and the exit point 414 being located between a lifting surface 413 and another lowering surface 412;

when the entry point 413 comes into contact with the hook lever 33, the locking end 32 starts to enter into the locking portion 12, and after the cam 41 is rotated toward the trigger 1, the descending surface 412 comes into contact with the hook lever 33;

when the exit point 414 contacts the hook lever 33, the locking end 32 starts to exit the locking portion 12, and the lift surface 411 contacts the hook lever 33 after the cam 41 rotates toward the trigger 1.

As shown in fig. 10, since the distance of the entry point 413 from the rotation center of the cam 41 is smaller than the distance of the exit point 414. When the switching wheel 4 rotates to the entering point 413 to contact the hook lever 33, the locking end 32 starts to enter into the locking portion 12, and then the cam 41 continues to rotate counterclockwise so that the descending surface 412 contacts the hook lever 33 and the locking end 32 completely enters into the locking portion 12.

As shown in fig. 18, when the switching wheel 4 rotates to the exit point 414 to come into contact with the hook lever 33, the locking end 32 starts to exit from the locking portion 12, and then the cam 41 continues to rotate counterclockwise, so that the lift surface 411 comes into contact with the hook lever 33, and the locking end 32 is completely separated upward from the locking portion 12.

Further, as shown in fig. 6, the hook bar 33 is a straight bar, the lifting surface 411 is a plane, and the descending surface 412 is an arc-shaped surface protruding toward the hook bar 33.

The plane contact area of the lifting surface 411 and the hook rod 33 is large, which is beneficial to stably keeping the anti-back hook 3 in a separation state. The descending surface 412 is an arc surface, and the descending surface 412 is in line contact with the hook rod 33 in the anti-retreat state, so that the switching wheel 4 can rotate again.

Further, as shown in fig. 8, the ratchet wheel 42 includes a plurality of pawls 421, and the trigger 11 rotates the ratchet wheel 42 by pushing the pawls 421.

When the ratchet wheel 42 rotates, the cam 41 is driven to rotate together, and the cam 41 pushes the anti-drop hook 3 to lift up and down.

Example two:

referring to fig. 2 and 4-5, a schematic view of the cart is shown.

The cart 100 comprises a frame 101, a first raceway 102 installed in the frame 101, a plurality of pulleys 103 installed at the bottom of the frame 101, and a locking and unlocking mechanism 10, wherein a mounting bracket 2 is installed on the frame 101 below the first raceway 102.

In fig. 2, a is the mounting position of the mounting bracket 2, and the mounting bracket 2 is located on the downhill side of the first raceway 102. And B is the mounting position of the lifting stock stop 104.

Further, as shown in fig. 4, the front side surface of the frame 101 is provided with a lifting striker 104, and the trigger 1 further includes a guide surface 14 (see fig. 1);

referring to fig. 7, in the disengaged state, the lifting striker 104 blocks the front end of the first raceway 102;

referring to fig. 9, during the retreat prevention process, the guide surface 14 guides the lift striker 104 to descend below the front end of the first raceway 102.

The lowering of the elevating striker 104 is guided by the trigger 1, and the press rod 1042 of the elevating striker 104 acts on the guide surface 14 when the cart 100 moves toward the stack 200 on which the trigger 1 is mounted. As the cart 100 approaches the stack 200, the plunger 1042 moves down the guide surface 14 and eventually remains on the bottom surface of the trigger 1. The press rod 1042 drives the whole lifting stop mechanism 104 to move downwards.

Specifically, as shown in fig. 4, the lifting striker 104 includes a striker rod 1041, a pressing rod 1042, a connecting rod 1043, and a return spring 1044.

As shown in fig. 7, the striker 1041 is located at the topmost end of the elevating striker 104 and is used for blocking the material box 300 placed on the first raceway 102.

As shown in fig. 9, when the striker 1041 is lowered to be below the first raceway 102, the material box 300 can slide from the first raceway 102 to the second raceway 201.

Further, as shown in fig. 5 and 12, a visualization mechanism 105 is further mounted on the frame 101, the visualization mechanism 105 includes a visualization lever 1051, a visualization cam 1052 and a transmission shaft 1053, the visualization cam 1052 is fixedly connected with the switching wheel 4 through the transmission shaft 1053, the visualization cam 1052 is driven to rotate when the switching wheel 4 rotates, and the visualization cam 1052 drives the visualization lever 1051 to move up and down for prompting that the current state is in the disengaged state or the anti-retreat state.

Specifically, as shown in fig. 5, visualization mechanism 105 further includes a sliding sleeve 1054, a display head 1055, and a sleeve 1056. Sleeve 1056 is mounted on frame 101, sliding sleeve 1054 is fixed on sleeve 1056, visualization rod 1051 penetrates sliding sleeve 1054, and display head 1055 is mounted on the top end of visualization rod 1051. The display head 1055 is a conspicuous color and can be extended and retracted up and down from the slide sleeve 1054.

As shown in fig. 15, when visualization cam 1052 is rotated to the shortest diameter to contact the bottom end of visualization lever 1051, visualization lever 1051 is in the lowest position and display head 1055 is retracted into sliding sleeve 1054. The operator cannot see the display head 1055, which indicates the anti-retreat state.

As shown in fig. 20, when visualization cam 1052 is rotated near the longest diameter into contact with the bottom end of visualization lever 1051, visualization lever 1051 is in a near uppermost position and display head 1055 is extended from sliding sleeve 1054. The operator can see the display head 1055, which indicates that the anti-retreat hook 3 retreats from the lock portion 12.

The visualization unit 105 alerts the operator of the state of the lock/unlock mechanism 10 by the conspicuous color of the display head 1055.

Example three:

referring to fig. 3, 7, 9, 11-12, 14-15, 17, 19-20, 22 and 24, a schematic diagram of the discharging system in the third embodiment is shown.

The discharging system comprises a material rack 200, the material rack 200 comprises a second raceway 201 and further comprises a cart 100, the first raceway 102 is used for being in butt joint with the second raceway 201, and the triggering part 1 is installed on the material rack 200.

In the third embodiment, the operation of the discharging system comprises a retreat prevention process and a separation process, wherein the retreat prevention process comprises four states, namely a separation state, an entry state, a bottoming state and an retreat prevention state; the disengagement process also includes four states, a first retract state, a second retract state, a third retract state, and a fourth retract state. The disengaging state is the same as the fourth withdrawing state, namely the withdrawing prevention process is changed from the disengaging state to the withdrawing prevention state, and the disengaging process finally returns to the disengaging state to complete a cycle.

The following explains each state of the discharge system one by one:

a disengaged state:

as shown in fig. 6 to 7, at this time, the lifting surface 411 of the cam 41 is in contact with the hook lever 33, the locking end 32 is separated from the locking portion 12, and the cart 100 and the stack 200 are not yet completely closed.

Entering a state:

as shown in fig. 8, when the cart 100 is moved toward the rack 200 in the hollow arrow direction, the trigger 11 first contacts one of the pawls 421 of the ratchet 42. At this time, the anti-retreat hook 3 is lifted, and the locking end 32 horizontally enters above the locking portion 12 to the left in fig. 8, but does not yet enter downward.

As shown in fig. 9, the plunger 1042 slides down the guide surface 14 so that the lift striker 104 begins to descend.

Entering a bottom state:

as shown in fig. 10, the trigger 11 pushes the ratchet wheel 42 to rotate counterclockwise, and the trigger 11 abuts against the root of the pawl 421 of the ratchet wheel 42. So that the entry point 413 comes into contact with the hook lever 33, the locking end 32 of the anti-backup hook 3 starts to enter into the locking portion 12.

As shown in fig. 11, at this time, the press rod 1042 slides to the bottom surface of the trigger 1, and the elevating striker 104 descends to the lowest position. The striker bar 1041 descends below the first ramp rail 102, and the discharge box 300 slides into the second ramp rail 201 from the first ramp rail 102.

As shown in fig. 12, the visualization cam 1052 rotates synchronously with the cam 41, and the portion of the cam 1052 near the shortest diameter contacts the bottom end of the visualization rod 1051, indicating that the head 1055 is not exposed.

A retreat prevention state:

as shown in fig. 13 to 15, the cart 100 is slightly retracted in the hollow arrow direction, and the switching wheel 4 continues to rotate counterclockwise by its own weight, so that the falling surface 412 comes into contact with the hook lever 33. The latching end 32 continues down completely into the latching portion 12.

As shown in FIG. 14, the discharge magazine 300 continues to slide from the first ramp rail 102 into the second ramp rail 201.

As shown in fig. 15, at this time, the visualizing cam 1052 rotates synchronously with the cam 41, the shortest diameter of the cam 1052 contacts the bottom end of the visualizing rod 1051, and the display head 1055 is not exposed.

The first retraction state:

as shown in fig. 16-17, when the discharge cassette 300 is fully loaded onto the stack 200, the discharge operation is complete. The skip 100 needs to be removed.

As shown in fig. 16, the slope hopper 100 is moved forward slightly again in the hollow arrow direction so that the trigger 11 touches the ratchet wheel 42 again.

A second retraction state:

as shown in fig. 18-20, the cart 100 continues to move forward, and the trigger 11 enters the heel of the pawl 421. The cam 41 is rotated counterclockwise again so that the escape point 414 comes into contact with the hook lever 33, lifting the anti-escape hook 33 upward again, and the lock end 32 is escaped from the lock portion 12.

As shown in fig. 20, visualization cam 1052 is now rotated to approximately the maximum diameter into contact with the bottom end of visualization rod 1051, visualization rod 1051 is in the approximately uppermost position, and display head 1055 is extended from sliding sleeve 1054. The operator can see the display head 1055, which indicates that the anti-retreat hook 3 retreats from the lock portion 12.

The third retraction state:

as shown in fig. 21, the cart 100 is slightly retreated again, the ratchet 42 is separated from the trigger 11, and the cam 42 rotates counterclockwise again by its own weight, but the retreating point 414 is still in contact with the hook lever 33.

As the cart 100 is retracted (i.e., translated to the right), the plunger 1042 begins to move also to the right, ready to enter the guide surface 14, as shown in fig. 22.

A fourth retracted state:

as shown in fig. 23, the cart 100 is further retracted, and the cam 41 is rotated counterclockwise again by its own weight, completely separating from the trigger 1. The cam 41 rotates until the lift surface 411 comes into contact with the hook lever 33 again.

As shown in fig. 24, the press rod 1042 slides upward along the guide surface 14, so that the elevating striker 104 is raised by the return spring 1044.

A new material box 300 can be placed on the slope skip 100 again, and the next unloading and transferring operation process is carried out.

Example four:

referring to fig. 25-32, there are shown schematic views of eight states of the lock release mechanism in the fourth embodiment.

In the fourth embodiment, the cam 41 is a triple cam, and the ratchet 42 has six pawls. The angle of rotation of each cycle in the three cams is 120 deg., the ratchet wheel 42 rotates 60 deg. a single time, and rotates twice per cycle.

The double cam and the three cams have larger rotating strokes and are not easy to generate misoperation.

The operation process of the locking and unlocking mechanism in the fourth embodiment is similar to that in the third embodiment, and is not described again.

The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.

Claims

1. A locking and unlocking mechanism is characterized by comprising a trigger piece, a mounting bracket, an anti-retreating hook and a switching wheel;

2. The lock release mechanism according to claim 1, wherein the trigger further includes a body, the trigger portion protrudes from the body toward the switching wheel, and the lock portion is a groove formed on the body.

3. The locking and unlocking mechanism as claimed in claim 1, wherein the anti-retreat hook further includes a hook lever that connects the locking end and the connecting end, and the switching wheel acts on the hook lever to drive the anti-retreat hook into or out of the locking portion.

4. The lock release mechanism as claimed in claim 3, wherein the switching wheel includes a cam and a ratchet wheel, the cam and the ratchet wheel are coaxially and fixedly connected, the cam is engaged with the hook lever, and the ratchet wheel is engaged with the trigger.

5. The lock release mechanism according to claim 4, wherein the cam includes a lifting surface and a lowering surface;

6. The lock release mechanism of claim 5, wherein the cam further includes an entry point and an exit point, the entry point being located between one of the lifting surfaces and one of the lowering surfaces, the exit point being located between one of the lifting surfaces and the other of the lowering surfaces;

7. The locking and unlocking mechanism according to claim 5, wherein the hook bar is a straight bar, the lifting surface is a flat surface, and the lowering surface is an arc-shaped surface protruding toward the hook bar.

8. The lock release mechanism according to claim 4, wherein the ratchet includes a plurality of pawls, and the trigger portion rotates the ratchet by pushing the pawls.

9. The lock release mechanism of claim 3, wherein the cam is a double cam and the ratchet has four pawls.

10. The lock release mechanism of claim 3, wherein the cam is a triple cam and the ratchet has six pawls.

11. A stroller comprising a frame, a first raceway mounted in the frame, and a plurality of pulleys mounted on a bottom of the frame, wherein the stroller further comprises the locking and unlocking mechanism of any one of claims 1 to 10, and the mounting bracket is mounted on the frame below the first raceway.

12. The cart of claim 11, wherein a lift stop is mounted to a front side of the frame, the trigger further comprising a guide surface;

13. The cart of claim 11, wherein the frame further comprises a visualization mechanism, the visualization mechanism comprises a visualization rod, a visualization cam and a transmission shaft, the visualization cam is fixedly connected with the switching wheel through the transmission shaft, the switching wheel drives the visualization cam to rotate when rotating, and the visualization cam drives the visualization rod to move up and down for indicating that the visualization rod is in a separation state or a retreat prevention state currently.

14. A cart comprises a frame, a first roller path arranged in the frame and a plurality of pulleys arranged at the bottom of the frame, and is characterized by further comprising an installation support, an anti-back hook and a switching wheel;

the mounting bracket is mounted below the first roller path on the frame;

15. A discharge system comprising a stack, said stack comprising a second raceway, and further comprising the cart of any of claims 11-13, said first raceway for interfacing with said second raceway, said trigger being mounted on said stack.