CN115101994A

CN115101994A - Charging butt joint device and charging connection method

Info

Publication number: CN115101994A
Application number: CN202211032987.6A
Authority: CN
Inventors: 陈良伟; 李涅; 陈志斌
Original assignee: Yundi New Energy Technology Suzhou Co ltd
Current assignee: Yundi New Energy Technology Suzhou Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-09-23
Anticipated expiration: 2042-08-26
Also published as: CN115101994B

Abstract

The invention provides a charging butt joint device and a charging connection method, and relates to the field of conductive connection. The charging butt joint device comprises a charging head module and a charging seat, and a first-stage compression mechanism and a second-stage compression mechanism are installed on a fixed box of the charging head module. The primary compression mechanism comprises an electric brush plate frame, an elastic element I and an electrode brush block, wherein the front end and the rear end of the elastic element I are respectively connected with the electric brush plate frame and the electrode brush block; the second-stage compression mechanism comprises a connecting rod and a second elastic element, and the front end and the rear end of the second elastic element are respectively abutted against the electric brush plate frame and the fixing box; the electrode brush block is provided with an open cavity, and a first magnet and a second magnet which is the same as the first magnet are movably arranged in the cavity; the convex elastic sheet is fixed on the front side of the second magnet, the protruding part of the convex elastic sheet is extruded and deformed by the thrust of the first magnet and abuts against the contact wall in the cavity, the compensation electrode block is fixed at the front end of the convex elastic sheet, and the compensation electrode block is tightly attached to the charging seat. The invention can avoid hard collision of electric equipment and virtual connection, and has high safety.

Description

Charging butt joint device and charging connection method

Technical Field

The invention belongs to the technical field of conductive connection, and particularly relates to a charging butt joint device and a charging connection method.

Background

An AGV, i.e., an automatic guided vehicle, is a vehicle equipped with an electromagnetic or optical automatic guiding device, which can travel along a predetermined guiding path, has safety protection and various transfer functions, and is widely used in high-end manufacturing environments; however, the AGVs consume energy continuously during their use, and usually use an automatic charging device to charge the AGVs, so as to ensure that the AGVs can operate automatically and continuously.

For example, chinese patent application with application publication No. CN111009781A discloses an AGV charging docking mechanism, which includes a charging head and a charging seat, wherein the charging head includes a charging arm, the charging arm can slide along X, Y and Z directions, and a reset mechanism for driving the charging arm to reset is respectively disposed in the sliding directions of the X, Y and Z directions, and a first electrode assembly is disposed at an end of the charging arm; the charging seat is provided with a butt joint port, a second electrode assembly is arranged in the butt joint port, and the charging arm is inserted into the butt joint port and enables the second electrode assembly to be in butt joint with the first electrode assembly to be conductive.

Although the existing charging and docking device realizes docking and charging of the AGV, in the actual use process, the AGV trolley extrudes the charging brush block by moving, so that a brush plate of a charging seat on the trolley is contacted with the fixed charging brush block, and the existing charging brush block is generally fixed on a charging support, so that the existing charging and docking device has higher requirements on the positioning precision, the repetition precision and the like of the AGV trolley; if the stop position of AGV dolly has surpassed the stroke of the brush piece that charges then can lead to AGV dolly and the brush piece that charges to take place the collision, causes the support that charges or AGV dolly to warp and damage even, also can cause simultaneously to charge brush piece and brush board contact failure, leads to contact resistance too big, the unusual scheduling problem that generates heat.

If current docking arrangement that charges is used in the vibration or easily produce under the operating mode that charges that instantaneous not hard up, connect between the charging seat on brush and the AGV dolly virtual very easily, lead to the contact resistance increase between them and produce the temperature rise problem of generating heat, if this process is gone on continuously, can lead to the conductor red heat or the trouble such as burning, circuit damage.

Disclosure of Invention

The invention aims to provide a charging docking device, which can be used for conveniently docking electric equipment such as an AGV and the like with the charging docking device, reducing the positioning precision requirement of the electric equipment, avoiding the problem of hard collision between the electric equipment and the charging device caused by displacement deviation of the electric equipment, ensuring stable electrode contact and avoiding the problems of resistance increase and temperature rise of a charging circuit caused by vibration or instantaneous virtual connection.

The invention is realized by the following technical scheme:

a charging butt joint device comprises a charging head module and a charging seat, wherein the charging head module comprises a fixed box, a first-stage compression mechanism and a second-stage compression mechanism, and the first-stage compression mechanism and the second-stage compression mechanism are arranged on the fixed box;

the primary compression mechanism comprises an electric brush plate frame, an elastic piece I and two electrode brush blocks, the electrode brush blocks are communicated with the charging pile to realize power supply, the front end and the rear end of the elastic piece I are respectively and flexibly connected with the electric brush plate frame and the electrode brush blocks, and the elastic piece I forwards presses the electrode brushes into the charging seat and is electrically connected with the charging seat;

the secondary compression mechanism comprises a connecting rod and a second elastic part, the front end of the connecting rod is fixedly connected with the electric brush plate frame, the rear end of the connecting rod is inserted into the fixed box, the elastic part is sleeved on the connecting rod, and the front end and the rear end of the second elastic part are respectively abutted against the electric brush plate frame and the fixed box;

the front end of the electrode brush block is provided with a cavity with a front opening, a first magnet is fixedly arranged in the cavity along the vertical direction, and a second magnet with the same magnetic grade as the first magnet is movably arranged in the cavity; the second magnet clings to the first magnet during charging;

the front side of the second magnet is fixedly connected with a convex elastic sheet, and the convex part of the convex elastic sheet can be deformed when being squeezed; the arc-shaped touch wall is arranged in the cavity, the convex elastic sheet is abutted against the touch wall under the thrust of the first magnet, the front end of the convex elastic sheet is fixedly connected with a compensation electrode block, and the compensation electrode block is electrically connected with the charging seat.

Preferably, the front side of the second magnet is at least symmetrically and fixedly connected with two convex elastic sheets, and the compensation electrode block is connected with each convex elastic sheet.

Preferably, a guide groove is further formed in the electrode brush block, a guide rail matched with the guide groove is arranged on the second magnet, and the guide rail moves back and forth along the guide groove.

Furthermore, a cavity is arranged in the fixed box, a rotating shaft is arranged in the cavity along the vertical direction, gears and cams are connected to the rotating shaft in a vertically staggered manner, and the far shaft side of the cam is abutted against the rear end of the connecting rod in an initial state;

a sliding rod is fixedly connected to the rear of the electric brush plate frame, the sliding rod is horizontally inserted into the fixed box, and a rack meshed with the gear is installed on the rear side of the sliding rod;

when the two-stage compression mechanism is compressed, the sliding rod is extruded to move backwards to drive the gear to rotate, and the gear drives the rotating shaft and the cam to synchronously rotate, so that the far shaft side of the cam is far away from the connecting rod.

Preferably, a spring seat and a third elastic element are arranged on the rotating shaft below the cam, and the third elastic element flexibly supports the cam;

the utility model discloses a slide bar, including the cam, the distal axis side top of cam is equipped with the domatic one that inclines backward, the rear end of connecting rod sets up the stopper, the bottom of stopper is equipped with the domatic two that inclines forward, domatic two press on domatic one, when the connecting rod receives backward thrust, the connecting rod extrudees downwards the cam, makes the slide bar with the connecting rod all can backward move.

Preferably, a brush shell is mounted on the brush plate frame, the first elastic element is mounted in the brush shell, and the electrode brush block can move back and forth in the brush shell.

Furthermore, the brush shell is loosely matched with the brush plate frame, so that the precision requirement of butt joint between electric equipment and the electrode brush block is reduced;

set up through-hole one on the brush shell, set up through-hole two on the brush grillage, the diameter of through-hole one is greater than the diameter of through-hole two, the brush shell with fasten by bolt and nut subassembly between the brush grillage, the head of bolt does not compress tightly the brush shell makes the brush shell can rock in vertical plane.

Furthermore, a shield made of an insulating material is arranged on the front panel of the fixed box, and the shield covers the rear side of the electric brush plate frame in a free state; when the electrode brush block is pressed backwards to be flush with the protective cover, the protective cover is in close contact with the shell of the charging seat, and the charging seat and the electrified part of the electrode brush block are isolated inside the protective cover.

Further, still install on the brush grillage and survey the contact, be used for detecting electric connection break-make state between electrode brush piece and the charging seat, survey the contact by battery powered, and with charging seat and display terminal establish ties.

Another objective of the present invention is to provide a charging connection method, which solves the problems of high positioning accuracy requirement of the electric device, hard collision easily occurring, and charging temperature rise due to vibration or instantaneous virtual connection.

The charging connection method comprises the following steps:

the charging seat of the electric equipment moves to the front of the electrode brush block and backwards extrudes the electrode brush block and the elastic piece I until the charging seat is reliably and electrically connected with the electrode brush block under the action of the reverse pressure of the elastic piece I;

when the electric equipment continues to move backwards, the electric brush plate frame extrudes the second elastic piece backwards, so that the connecting rod moves inwards the fixed box, and a sufficient buffer stroke is provided for the electric equipment;

when the connection between the electric equipment and the charging head module vibrates or is instantaneously loosened, the whole electrode brush block moves backwards, the magnet in the electrode brush block forwards pushes the magnet II to enable the magnet to forwardly extrude the convex elastic sheet, the convex part of the convex elastic sheet deforms and is continuously attached to the contact wall, and the compensation electrode block at the front end of the convex elastic sheet keeps attached to the charging seat, so that the compensation electrode block, the convex elastic sheet and the electrode brush block are electrically connected.

The beneficial effects of the invention are:

according to the invention, by arranging the primary compression mechanism and the secondary compression mechanism, when the charging seat of the electric equipment (such as an AGV trolley) extrudes the electrode brush block backwards, the electrode brush block is in close contact with the charging seat under the reverse pressure of the elastic piece I, and when the electric equipment continues to move backwards, the electrode brush block and the charging seat integrally move backwards under the buffer action of the secondary compression mechanism, so that the buffer stroke between the charging head module and the AGV trolley is increased, the positioning precision requirement on the AGV trolley is reduced, and the safety when the AGV trolley is in contact with the electrode brush block is increased.

According to the invention, the front end of the electrode brush block is provided with a cavity with a front opening, a first magnet is fixedly arranged in the cavity along the vertical direction, a second magnet with the same magnetic level as the first magnet is movably arranged in the cavity, the front side of the second magnet is fixedly connected with a convex elastic sheet, the protruding part of the convex elastic sheet can be deformed when being extruded, and a compensation electrode block is fixed at the front end of the convex elastic sheet. When vibration or instantaneous not hard up take place, the pressure of a pair of electrode brush piece of elastic component disappears temporarily, magnet one is followed electrode brush piece and is moved backward, and magnet two receives the thrust of magnet one and still extrudees convex shell fragment and compensation electrode piece forward, make the convex shell fragment warp and the butt touches the wall, make compensation electrode piece slightly move forward, thereby continuously with charging seat electric connection, do not receive the influence of elastic component vibration or instantaneous not hard up, avoid virtual joint and temperature rise phenomenon, security when having further guaranteed to contact between AGV dolly and the electrode brush piece.

The electric brush shell is arranged on the electric brush plate frame, the first elastic piece and the electrode brush block are arranged in the electric brush shell, and the electric brush shell is loosely matched with the electric brush plate frame instead of the conventional mode of fixedly arranging the electric brush shell on the electric brush plate frame by using screws, namely the electric brush shell can rock in a vertical plane, so that the electric brush shell can be smoothly butted with the electrode brush block even if an AGV (automatic guided vehicle) cannot be accurately aligned with the electrode brush block, and the precision requirement of butting between the AGV and the electrode brush block is further reduced.

According to the invention, the rotating shaft is arranged in the fixed box along the vertical direction, the gear and the cam are connected with the rotating shaft in a vertically staggered manner, the far shaft side of the cam is abutted against the rear end of the connecting rod in an initial state, and instantaneous front-back vibration of the electrode brush block caused by the fact that vibration of electric equipment or a working environment is transmitted to the secondary compression mechanism is avoided.

The rear part of the electrode brush block is fixedly connected with a slide bar, the slide bar is horizontally inserted into the fixed box, and the rear side of the slide bar is provided with a rack meshed with the gear. Install spring holder and elastic component three in the below of cam in the pivot, three flexible support cams of elastic component, the distal axis side top of cam is equipped with domatic one, the rear end installation stopper of connecting rod, the bottom of stopper is equipped with domatic two, domatic two presses on domatic one, under the normality, elastic component three is through cam and two domatic cooperations, apply forward thrust to the connecting rod, make second grade compressing mechanism be difficult to freely rock, the charging seat to the AGV dolly keeps the rigidity support state of relatively stable, reduce the possibility of virtual joint. When second grade compressing mechanism received the enough big extrusion force of AGV dolly, the connecting rod was through domatic one of domatic two to extrusion cam down, and the limiting displacement of cam to the connecting rod disappears this moment, and the slide bar receives the extrusion rearward movement and drive gear is rotatory, and the gear drives pivot and cam synchronous revolution, makes the far-axis side of cam keep away from the connecting rod, and the connecting rod continues to drive the electrode brush piece and removes backward together, avoids AGV dolly and electrode brush piece emergence rigid collision.

Drawings

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

FIG. 1 is a schematic front view of the present invention;

fig. 2 is a schematic longitudinal sectional view of a charging head module according to the present invention;

FIG. 3 is an enlarged partial schematic view of the interior of an electrode brush block embodying the present invention;

FIG. 4 is a schematic diagram of the convex spring and the compensation electrode block being pressed forward by the second magnet in the electrode brush block when a virtual connection trend occurs;

FIG. 5 is a schematic cross-sectional view of the loose fit between the brush housing and the brush plate holder of the present invention;

fig. 6 is a schematic structural view of a two-stage compression mechanism according to embodiment 2 of the present invention, viewed from above;

FIG. 7 is a schematic partial cross-sectional view of portion A-A of FIG. 6;

FIG. 8 is a schematic view of the limiting block of the present invention;

FIG. 9 is a schematic view of a process of the cam and the stopper of embodiment 2 of the present invention in cooperation with each other in a top view;

fig. 10 is a schematic view of a process of the cam and the stopper of embodiment 2 of the present invention in a side view.

Reference numerals: 1. a charging head module; 2. a charging seat; 3. a fixed box; 4. an electric brush plate frame; 5. a first elastic part; 6. an electrode brush block; 7. a charging arm; 8. a connecting rod; 9. a second elastic piece; 10. a cavity; 11. a magnet I; 12. a second magnet; 13. a convex spring plate; 14. a contact wall; 15. a compensation electrode block; 16. a guide groove; 17. a guide rail; 18. an electric brush shell; 19. a first through hole; 20. a second through hole; 21. a bolt and nut assembly; 22. a shield; 23. a probe contact; 24. a rotating shaft; 25. a gear; 26. a cam; 27. a rack; 28. a slide bar; 29. a spring seat; 30. an elastic part III; 31. a limiting block; 32. a first slope surface; 33. a slope surface II; 34. and a key one.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1

The present embodiment discloses a charging docking device, which includes a charging head module and a charging seat, wherein the charging head module is installed on a charging pile, the charging seat is installed on an electric device, and the electric device of the present embodiment is described by taking an AGV cart as an example, but not limited to the AGV cart.

Referring to fig. 1 and 2, the charging head module 1 includes a fixed case 3, and a primary compression mechanism and a secondary compression mechanism mounted on the fixed case 3.

One-level compressing mechanism includes brush grillage 4, elastic component 5 and two electrode brush piece 6, and electrode brush piece 6 can be installed on brush grillage 4 with sliding around, and the rear end of electrode brush piece 6 is equipped with charging arm 7, and this charging arm 7 stretches into in the fixed box 3, with fill the electric pile switch-on in order to realize the power supply. The electrode brush block 6 is connected with the brush holder 4 by a first elastic member 5, and the first elastic member 5 can be selected from, but not limited to, a compression spring. When the charging seat 2 of AGV dolly and electrode brush piece 6 butt joint, charging seat 2 extrusion electrode brush piece 6, and elastic component 5 exerts reverse effort to electrode brush piece 6, impresses the electrode brush forward in the charging seat 2 and realize stable electric connection.

The second-stage compression mechanism comprises a connecting rod 8 and a second elastic piece 9. The number of the connecting rods 8 can be selected from 4, and the connecting rods are respectively distributed at four top corners close to the electric brush plate frame. The front end of the connecting rod 8 is fixedly connected with the electric brush plate frame 4. The fixed box 3 is provided with a hole matched with the connecting rod 8, and the rear end of the connecting rod 8 penetrates through the hole and then is inserted into the fixed box 3. Two 9 elastic components are compression spring, and two 9 suit of elastic components are on two 8 connecting rods, and both ends are butt brush grillage 4 and fixed case 3 respectively around two 9 elastic components, and it provides a buffer stroke to brush grillage 4, avoids the AGV dolly to remove super displacement and with take place rigid collision between the electrode brush piece 6.

This device has set up the second grade compression, has increased the buffer stroke that the AGV dolly charges the butt joint, but because the flexible butt joint structure who introduces produces virtual phenomenon of connecing easily when vibration operating mode or instantaneous not hard up, consequently this device has further made following improvement:

referring to fig. 2 to 4, a cavity 10 with a front opening is disposed at the front end of the electrode brush block 6, a first magnet 11 is fixedly mounted at the bottom of the cavity 10 (i.e., at the right side of the cavity 10 in fig. 3) along the vertical direction, a second magnet 12 is movably mounted in the cavity 10, and the magnetic poles of the second magnet 12 and the first magnet 11 are the same. During normal charging, under the common extrusion of the elastic piece I5 and the charging seat 2, the magnet II 12 is tightly attached to the magnet I11.

Please refer to fig. 3, the convex elastic pieces 13 are welded on the front side of the second magnet 12, preferably, at least two convex elastic pieces 13 are symmetrically installed on the front side of the second magnet 12, the convex portion of the convex elastic pieces 13 can be deformed when being pressed, and the front end of each convex elastic piece 13 is fixedly connected with a vertically installed compensation electrode block 15, so as to improve the installation stability of the compensation electrode block 15. The arc-shaped contact wall 14 is arranged in the cavity 10, the convex elastic sheet 13 is abutted against the contact wall 14 when being pushed by the first magnet 11, and the compensation electrode block 15 is electrically connected with the charging seat 2, so that the charging seat 2 is electrically connected with the electrode brush block 6 through the compensation electrode block 15 and the contact wall 14.

Referring to fig. 4, when the AGV is in a vibration condition or is instantaneously loosened, the pressure of the first elastic member 5 on the electrode brush block 6 disappears in a short time, the first magnet 11 moves backward along with the electrode brush block 6, the second magnet 12 is pushed forward by the first magnet 11 and still pushes the convex elastic piece 13 forward to deform the convex elastic piece and abut against the contact wall 14, and the convex elastic piece 13 continuously pushes the compensation electrode block 15 forward after deforming, so that the compensation electrode block 15 is continuously and electrically connected with the charging seat 2 without being influenced by the vibration or instantaneous loosening of the first elastic member 5, thereby avoiding the phenomena of virtual connection and temperature rise and further ensuring the safety when the AGV is in contact with the electrode brush block 6.

The inside of the electrode brush block 6 is also provided with a guide groove 16, the second magnet 12 is provided with a guide rail 17 matched with the guide groove 16, and the guide rail 17 moves back and forth along the guide groove 16, so that the moving reliability of the second magnet 12 is improved.

As a further improvement, the device is provided with a brush shell 18 on the brush plate frame 4, an elastic element I5 is arranged in the brush shell 18, and the electrode brush block 6 can move back and forth in the brush shell 18.

Referring to fig. 5, the brush housing 18 and the brush plate rack 4 are loosely fitted, that is, the brush housing 18 can slightly shake up and down, left and right in a vertical plane, so that the accuracy requirement of the butt joint between the electric equipment and the electrode brush block 6 is reduced, and even if the parking position of the AGV cart is not accurate enough, the AGV cart can be smoothly butt-jointed with the electrode brush block 6.

Specifically, a first through hole 19 is formed in the brush shell 18, a second through hole 20 is formed in the brush plate frame 4, the diameter of the first through hole 19 is larger than that of the second through hole 20, the brush shell 18 and the brush plate frame 4 are fastened through a bolt and nut assembly 21, the portion, located in the first through hole 19 and the second through hole 20, of a bolt is a polished rod, the head portion of the bolt does not press the brush shell 18 tightly, and the brush shell 18 can swing in a vertical plane.

Referring to fig. 1 and 6, a shield 22 made of an insulating material is mounted on the front panel of the fixing box 3, and in a free state, the shield 22 covers the rear side of the brush holder 4, and the electrode brush block 6 extends out of the shield 22; when the electrode brush block 6 is pressed backward to be flush with the shield 22, the shield 22 is in close contact with the shell of the charging base 2, so that the charging base 2 and the charged part of the electrode brush block 6 are isolated inside the shield 22, and the charging safety is improved.

Referring to fig. 1, the electric brush holder 4 is further provided with a detection contact 23 for detecting an on-off state of the electrical connection between the electrode brush block 6 and the charging base 2, the detection contact 23 is powered by a battery, and when charging, the detection contact is connected in series with the charging base 2 and the display terminal to indicate whether the connection between the electrode brush block 6 and the charging base 2 is reliable.

The charging connection method of the embodiment includes the following steps:

the charging seat 2 of the AGV moves to the front of the electrode brush block 6 and backwards extrudes the electrode brush block 6 and the elastic piece I5 until the charging seat 2 is reliably electrically connected with the electrode brush block 6 under the action of the reverse pressure of the elastic piece I5;

when the electric equipment continues to move backwards, the electric brush plate frame 4 extrudes the second elastic piece 9 backwards, so that the connecting rod 8 moves inwards the fixed box 3, a sufficient buffer stroke is provided for the AGV, and the rigid collision between the AGV and the fixed box is avoided;

when the connection between the AGV trolley and the charging head module 1 is vibrated or instantaneously loosened, the pressure of the first elastic piece 5 disappears temporarily, the whole electrode brush block 6 moves backwards, the first magnet 11 in the electrode brush block 6 pushes the second magnet 12 forwards to enable the second magnet 12 to extrude the convex elastic piece 13 forwards, the convex part of the convex elastic piece 13 deforms and is continuously attached to the contact wall 14 in a clinging mode, the compensation electrode block 15 is pushed forwards to enable the compensation electrode block to be in a clinging mode with the charging seat 2, and therefore the compensation electrode block 15, the convex elastic piece 13 and the electrode brush block 6 are reliably and electrically connected to avoid virtual connection.

Example 2

In this embodiment, on the basis of embodiment 1, a second-stage compression mechanism is further improved, so that the two-stage compression mechanism performs stage work, when the AGV does not need a buffer stroke, the second-stage compression mechanism and the AGV are similar to a rigid connection state, and stable charging butt joint can be realized only by the first-stage compression mechanism, thereby avoiding virtual connection between the first-stage compression mechanism and a charging seat due to excessive flexible connection; when the AGV trolley has over displacement and needs buffering stroke, the secondary compression mechanism and the AGV trolley are automatically changed into a flexible connection state, and hard collision is avoided.

The embodiment is realized by the following scheme:

referring to fig. 6 to 10, a cavity is formed in the fixing box 3, a rotating shaft 24 is installed in the cavity, and upper and lower ends of the rotating shaft 24 are rotatably installed on the fixing box 3. The shaft 24 is keyed to a gear 25 and a cam 26, the gear 25 being located above the cam 26 with a spacing therebetween, i.e. they are located on different horizontal planes, in such a way as to avoid interference between the cam 26 and the slide 28 when it rotates. The rear end fixed mounting stopper 31 of connecting rod 8, stopper 31 play the effect of the removal stroke of restriction connecting rod 8, avoid connecting rod 8 to move forward overtravel and drop from the fixing base.

The far shaft side of the cam 26 abuts against the limiting block 31 in the initial state, and the connecting rod 8 is prevented from shaking forwards and backwards, so that the rigid connection state between the two-stage compression mechanism and the AGV trolley is similar to that of the AGV trolley. The far-axis side of the cam is the side far from the rotating shaft 24, and the near-axis side is the side close to the rotating shaft 24.

Referring to fig. 6 and 7, the rear portion of the brush plate rack 4 is fixedly connected with the sliding rods 28, and the number of the sliding rods 28 is preferably four, and the sliding rods are distributed at four top corners of the brush plate rack 4. A slide bar 28 is horizontally inserted into the stationary box 3, and a rack 27 engaged with the gear 25 is installed at the rear side of the slide bar 28. When the secondary compression mechanism is compressed by the AGV trolley, the sliding rod 28 is extruded to move backwards, so that the rack 27 drives the gear 25 to rotate, the gear 25 drives the rotating shaft 24 and the cam 26 to synchronously rotate, and the far shaft side of the cam 26 is far away from the connecting rod 8, so that the connecting rod 8 can freely slide, and the secondary compression mechanism and the AGV trolley automatically change into a flexible connection state.

More specifically, referring to fig. 7 with emphasis, a spring seat 29 and a third elastic member 30 are mounted on the rotating shaft 24 below the cam 26, and the third elastic member 30 is a compression spring, and the upper end and the lower end of the third elastic member abut against the cam 26 and the spring seat 29, respectively. The cam 26 is connected with the rotating shaft 24 in a positioning mode through a first key 34, and the length of the first key 34 is smaller than that of a key groove in the cam 26, so that the cam 26 can slide up and down.

Referring now more particularly to fig. 9 and 10, the distal end of the cam 26 is provided with a rearwardly inclined ramp 32. As shown in fig. 8, a forward sloping surface two 33 is arranged at the bottom of the limiting block 31, the sloping surface two 33 presses on the sloping surface one 32, when the two-stage compression mechanism and the AGV carriage are in a rigid connection state, the third elastic member 30 presses the cam 26 upwards, the cam 26 presses the connecting rod 8 forwards by means of the cooperation of the sloping surface one 32 and the sloping surface two 33, so that the sum a of the forward thrust of the third elastic member 30 and the second elastic member 9 on the connecting rod 8 is greater than the backward pressure b applied to the connecting rod 8 by the AGV carriage, and at this time, reliable charging butt joint can be achieved only by using the first-stage compression mechanism.

When the AGV trolley continues to move backwards and presses the electric brush plate frame 4, the backward pressure c applied to the connecting rod 8 is greater than the forward thrust sum a applied to the connecting rod 8, at the moment, the connecting rod 8 downwards presses the cam 26 through the limiting block 31 to realize unlocking, the sliding rod 28 and the connecting rod 8 both move backwards, the sliding rod 28 enables the far shaft side of the cam 26 to be far away from the limiting block 31 through transmission among the rack 27, the gear 25, the rotating shaft 24 and the cam 26, and further provides a space for the limiting block 31 to slide forwards freely, so that the second-stage compression mechanism provides a flexible buffer stroke for the AGV trolley, and automatic switching between a rigid connection state and a flexible connection state between the second-stage compression mechanism and the AGV trolley is realized.

The other structure of this embodiment is the same as embodiment 1.

The working process of the embodiment is as follows:

the AGV moves in front of the electrode brush block 6 and the charging stand 2 presses the electrode brush block 6 and the elastic member one 5 backward.

When the parking position of AGV dolly leaned on forward relatively, do not need second grade compression mechanism, the flexonics of avoiding multistage compression causes virtual phenomenon of connecing when vibrating. At this time, the connecting rod 8 applies forward rigid pressure to the AGV cart under the combined action of the third elastic element 30, the spring seat 29, the rotating shaft 24 and the cam 26, so that the shaking of the brush plate rack 4 is reduced.

When the parking stall of AGV dolly leans on the back, AGV dolly continues rearward movement and extrudees brush grillage 4 promptly, brush grillage 4 backward extrusion connecting rod 8, stopper 31 of connecting rod 8 extrudees cam 26 down domatic one 32, slide bar 28 passes through rack 27 simultaneously, gear 25, the transmission between pivot 24 and the cam 26, stopper 31 is kept away from to the distal axis side that makes cam 26, the space that freely slided forward is provided for connecting rod 8, switch over to the flexonics state between second grade compression mechanism and the AGV dolly, the buffering stroke has been provided to the AGV dolly.

After charging is completed, the AGV releases the electric brush plate frame 4, the second elastic piece 9 and the third elastic piece 30 jointly push the electric brush plate frame 4 forward, the electric brush plate frame 4 further pulls the sliding rod 28 to move forward, the sliding rod 28 enables the rotating shaft 24 to rotate reversely through the matching between the rack 27 and the gear 25 again, the cam 26 is reset to be in an initial state, and in the process, the first slope surface 32 of the cam 26 smoothly transits to the position below the second slope surface 33 of the limiting block 31 to wait for next charging.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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. A charging butt joint device comprises a charging head module (1) and a charging seat (2), and is characterized in that the charging head module (1) comprises a fixed box (3) and a primary compression mechanism and a secondary compression mechanism which are arranged on the fixed box (3);

the primary compression mechanism comprises an electric brush plate frame (4), an elastic piece I (5) and two electrode brush blocks (6), the front end and the rear end of the elastic piece I (5) are respectively and flexibly connected with the electric brush plate frame (4) and the electrode brush blocks (6), and the elastic piece I (5) extrudes the electrode brush blocks (6) forwards to enable the electrode brush blocks (6) to be electrically connected with the charging seat (2);

the secondary compression mechanism comprises a connecting rod (8) and a second elastic part (9), the front end of the connecting rod (8) is fixedly connected with the electric brush plate frame (4), the rear end of the connecting rod is inserted into the fixed box (3), the second elastic part (9) is sleeved on the connecting rod (8), and the front end and the rear end of the second elastic part (9) are respectively abutted against the electric brush plate frame (4) and the fixed box (3);

the front end of the electrode brush block (6) is provided with a cavity (10) with a front opening, a first magnet (11) is fixedly installed in the cavity (10) along the vertical direction, a second magnet (12) with the same magnetic level as the first magnet (11) is movably installed in the cavity (10), and the first magnet (11) applies forward thrust to the second magnet (12);

the front side of the second magnet (12) is fixedly connected with a convex elastic sheet (13), and the convex part of the convex elastic sheet (13) can be deformed when being squeezed; the arc-shaped touch wall (14) is arranged in the cavity (10), the convex elastic sheet (13) is abutted to the touch wall (14) under the thrust of the magnet I (11), the front end of the convex elastic sheet (13) is fixedly connected with a compensation electrode block (15), and the compensation electrode block (15) is electrically connected with the charging seat (2).

2. The charging docking device according to claim 1, wherein the front side of the second magnet (12) is at least symmetrically fixedly connected with two convex spring pieces (13), and the compensation electrode block (15) is connected with each convex spring piece (13).

3. The charging and docking device according to claim 1, wherein a guide groove (16) is further formed in the electrode brush block (6), a guide rail (17) matched with the guide groove (16) is arranged on the second magnet (12), and the guide rail (17) moves back and forth along the guide groove (16).

4. The charging docking device according to claim 1, wherein a cavity is arranged in the fixed box (3), a rotating shaft (24) is vertically arranged in the cavity, the rotating shaft (24) is in key connection with gears (25) and cams (26) in a vertically staggered manner, and the far shaft side of the cam (26) abuts against the rear end of the connecting rod (8) in an initial state;

a sliding rod (28) is fixedly connected to the rear of the electric brush plate frame (4), the sliding rod (28) is horizontally inserted into the fixed box (3), and a rack (27) meshed with the gear (25) is installed on the rear side of the sliding rod (28);

when the two-stage compression mechanism is compressed, the sliding rod (28) is extruded to move backwards to drive the gear (25) to rotate, and the gear (25) drives the rotating shaft (24) and the cam (26) to rotate synchronously, so that the far shaft side of the cam (26) is far away from the connecting rod (8).

5. The charging docking device according to claim 4, wherein a spring seat (29) and a third elastic member (30) are mounted on the rotating shaft (24) below the cam (26), and the third elastic member (30) flexibly supports the cam (26);

the utility model discloses a charging seat, including cam (26), the distance shaft side top of cam (26) is equipped with domatic one (32) that incline backward, the rear end of connecting rod (8) is equipped with stopper (31), the bottom of stopper (31) is equipped with sloping surface two (33) that incline forward, sloping surface two (33) press on sloping surface one (32), when connecting rod (8) receive charging seat (2) backward thrust, connecting rod (8) extrude cam (26) downwards, make slide bar (28) with connecting rod (8) all can move backward.

6. The charging docking device according to claim 1, wherein a brush case (18) is mounted on the brush holder (4), the first elastic member (5) is mounted in the brush case (18), and the electrode brush block (6) can move back and forth in the brush case (18).

7. The charging docking device according to claim 6, characterized in that the brush housing (18) and the brush plate holder (4) are loosely fitted to reduce the accuracy requirement for docking between the electric equipment and the electrode brush block (6);

set up through-hole one (19) on brush shell (18), set up through-hole two (20) on brush grillage (4), the diameter of through-hole one (19) is greater than the diameter of through-hole two (20), brush shell (18) with fasten by bolt and nut subassembly (21) between brush grillage (4), the head of bolt does not compress tightly brush shell (18), makes brush shell (18) can rock in vertical plane.

8. The charging dock according to claim 1, wherein a hood (22) of insulating material is mounted on a front panel of the stationary box (3), the hood (22) covering a rear side of the brush rack (4) in a free state; when the electrode brush block (6) is pressed backwards to be flush with the shield (22), the shield (22) is in close contact with the shell of the charging seat (2), and the charged parts of the charging seat (2) and the electrode brush block (6) are isolated inside the shield (22).

9. The charging docking device according to claim 3, wherein the brush holder (4) further comprises a detection contact (23) for detecting the on-off state of the electrical connection between the electrode brush block (6) and the charging base (2), and the detection contact (23) is powered by a battery and is connected in series with the charging base (2) and the display terminal when charging.

10. A charging connection method implemented by the charging docking device of any one of claims 1 to 9, the charging connection method comprising the steps of:

the charging seat (2) of the electric equipment moves to the front of the electrode brush block (6) and backwards extrudes the electrode brush block (6) and the elastic piece I (5) until the charging seat (2) is reliably and electrically connected with the electrode brush block (6) under the action of the reverse pressure of the elastic piece I (5);

when the electric equipment continues to move backwards, the electric brush plate frame (4) extrudes the second elastic piece (9) backwards, so that the connecting rod (8) moves towards the inside of the fixed box (3) and a sufficient buffer stroke is provided for the electric equipment;

when vibration or instantaneous not hard up appear in the connection between consumer and the head module of charging (1), whole backward movement of electrode brush piece (6), magnet (11) in electrode brush piece (6) promote two (12) of magnet forward, make two (12) of magnet extrude convex shell fragment (13) forward, the protruding position of convex shell fragment (13) takes place to be deformed and hugs closely continuously touch wall (14), compensation electrode piece (15) of convex shell fragment (13) front end keep hugging closely charging seat (2), thereby make compensation electrode piece (15) shell fragment (13) with keep electric connection between the convex electrode brush piece (6).