A charging device for a forklift truck

Abstract

The present application relates to the technical field of charging device, especially to a charging device of a forklift. The charging device comprises a charging box, a charging wire is arranged on the charging box, a charging gun is installed at the end of the charging wire away from the charging box, a fixing plate is fixedly connected with the charging gun, symmetrically distributed guide plates are slidingly connected with the charging gun, the symmetrically distributed guide plates are fixedly connected through connecting rods, elastic members are fixedly connected between the symmetrically distributed guide plates and the fixing plate, mounting shells are fixedly connected at the opposite sides of the symmetrically distributed guide plates, and intercepting blocks are slidingly connected in the mounting shells. The symmetrically distributed elastic members jointly drive the fixing plate to move, and then drive the charging gun to move synchronously, so that the charging gun is separated from the charging port of the forklift when the charging is completed, and the staff does not start the forklift without separating the charging gun from the charging port of the forklift, so that the charging gun and the charging port of the forklift are not damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging devices, in particular to a charging device for a forklift. BACKGROUND

[0002] The electric forklift is usually a material handling equipment powered by lead-acid batteries or lithium-ion batteries, and is widely used in various occasions. Compared with the traditional internal combustion engine forklift, the electric forklift has the advantages of environmental protection, low noise and easy maintenance. In the process of using the electric forklift, in order to maintain the normal operation of the forklift, the battery needs to be charged when the battery power is insufficient.

[0003] At present, when the forklift needs to be charged, the worker pulls out the charging gun from the charging device and connects the charging gun with the forklift charging port (hereinafter referred to as port), and then starts the charging device to charge the forklift. However, since the charging time is relatively long, the worker usually does not wait at the charging device until the charging is completed. Therefore, after the charging is completed, although the charging gun can stop supplying power to the forklift in time, the charging gun will still be connected with the port. When the worker starts the forklift without disconnecting the charging gun from the port, the forklift will drag the charging cable to a straight state during movement, causing the straightened charging cable to break due to the inability to withstand the tension, thereby causing damage to the charging cable. At the same time, the charging gun and the port may be damaged due to the dragging of the charging cable, resulting in deformation of the charging gun and the port due to the tension, affecting the normal use of the two, and even causing damage to the charging device under the action of the dragging of the charging cable. SUMMARY

[0004] In order to overcome the shortcomings proposed in the above background art, the present application provides a charging device for a forklift.

[0005] The technical implementation scheme of the present application is: a charging device for a forklift, comprising a charging box, a charging cable is arranged on the charging box, a charging gun is installed at one end of the charging cable away from the charging box, a fixing plate is fixedly connected to the charging gun, symmetrically distributed guide plates are slidingly connected to the charging gun, the symmetrically distributed guide plates are fixedly connected through connecting rods, elastic members are fixedly connected between the symmetrically distributed guide plates and the fixing plate, mounting shells are fixedly connected to the opposite sides of the symmetrically distributed guide plates, intercepting blocks are slidingly connected in the mounting shells, the intercepting blocks penetrate through and are slidingly connected to the adjacent guide plates, springs are arranged between the intercepting blocks and the adjacent guide plates, the symmetrically distributed intercepting blocks are limitingly matched with the fixing plate, extrusion rods are penetratingly and slidingly connected to the mounting shells, the extrusion rods are extrusionally matched with the adjacent intercepting blocks, and a limiting mechanism is arranged on the mounting shell to maintain the position of the adjacent intercepting blocks.

[0006] More preferably, the limiting mechanism comprises a fixed rod, the guide plate is fixedly connected with a connecting rod, the fixed rod is rotationally connected with the connecting rod of the adjacent guide plate, the fixed rod and the connecting rod of the adjacent guide plate are fixedly connected with a torsion spring, one end of the fixed rod away from the adjacent guide plate is fixedly connected with a connecting shell, the inside of the connecting shell is slidingly connected with a moving column, the moving column and the adjacent connecting shell are fixedly connected with a spring, one side of the intercepting block close to the adjacent fixed rod is fixedly connected with a positioning plate, the positioning plate is provided with a limiting groove, the moving column slides in the adjacent limiting groove, one side of the intercepting block close to the adjacent extrusion rod is fixedly connected with a resistance wire, the sides of the symmetrically distributed guide plates away from the fixed plate are commonly provided with a fixed assembly, and the fixed assembly is used to connect the symmetrically distributed guide plates with the charging port of the forklift.

[0007] More preferably, the installation shell, the adjacent intercepting block and the adjacent extrusion rod cooperatively form a sealed cavity, the sealed cavity is filled with a heat-sensitive gas, and the resistance wire is located in the adjacent sealed cavity.

[0008] More preferably, the limiting groove is composed of symmetrically distributed half-heart-shaped grooves, the adjacent and symmetrically distributed half-heart-shaped grooves are in communication with each other, and the symmetrically distributed half-heart-shaped grooves are all provided with inclined surfaces, and the distance between the inclined surfaces of the half-heart-shaped grooves and the adjacent intercepting block decreases with the decrease of the distance between the half-heart-shaped grooves and the adjacent guide plate.

[0009] More preferably, the fixed assembly comprises a driving ring, the driving ring is threadedly connected to the sides of the symmetrically distributed guide plates away from the fixed plate, the sides of the symmetrically distributed guide plates away from the fixed plate are all limitingly and slidingly connected with extrusion blocks, the extrusion blocks are extrusion-fitted with the charging port of the forklift, the symmetrically distributed guide plates are all provided with through grooves, the through grooves of the guide plates are slidingly connected with driving rods, the driving rods are limitingly and slidingly connected with the driving ring, the extrusion blocks are provided with inclined grooves, the driving rods slide in the inclined grooves of the adjacent extrusion blocks, one side of the driving ring close to the fixed plate is rotationally connected with a connecting rod, one side of the connecting rod close to the fixed plate is slidingly connected with a pawl, a spring is arranged between the pawl and the connecting rod, the middle portions of the symmetrically distributed guide plates are commonly slidingly connected with a ratchet wheel, the ratchet wheel is limitingly fitted with the pawl, and a torsion spring is fixedly connected between the ratchet wheel and the driving ring.

[0010] More preferably, the distance between the inclined grooves on the symmetrically distributed extrusion blocks increases with the decrease of the distance between the extrusion blocks and the charging gun.

[0011] More preferably, the ratchet wheel is slidably connected with a moving ring, and the moving ring is in extrusion fit with the pawl, symmetrically distributed hydraulic push rods are fixedly connected to the side of the ratchet wheel close to the fixed plate, the extension ends of the symmetrically distributed hydraulic push rods are fixedly connected with the moving ring, symmetrically distributed guide plates are fixedly connected to the side of the guide plates away from the adjacent extrusion blocks, the symmetrically distributed guide plates are in communication with the fixed parts of the adjacent hydraulic push rods through connecting pipes, a piston rod is slidably connected in the liquid storage shell, a spring is arranged between the piston rod and the adjacent liquid storage shell, the piston rod penetrates through the fixed plate and is slidably connected with the fixed plate, a limiting block is slidably connected to the end of the piston rod close to the adjacent extrusion block, the limiting block is in limiting fit with the fixed plate, a spring is fixedly connected between the limiting block and the adjacent piston rod, symmetrically distributed moving rods are slidably connected to the side of the fixed plate, the moving rods are in extrusion fit with the adjacent limiting blocks, and springs are fixedly connected between the moving rods and the fixed plate, and the fixed plate is provided with a sliding groove at the position close to the symmetrically distributed piston rods, and the sliding groove on the fixed plate is in extrusion fit with the adjacent limiting block.

[0012] More preferably, the elastic coefficient of the spring between the piston rod and the adjacent liquid storage shell is smaller than the elastic coefficient of the adjacent elastic member, so as to drive the fixed plate to move synchronously with the symmetrically distributed piston rods.

[0013] More preferably, the threaded rod is rotatably connected to one of the connecting plates of the charging gun, and the connecting plates of the charging gun are commonly slidably connected with a protective shell, and the protective shell is in threaded connection with the threaded rod.

[0014] More preferably, the mobile seat is slidably connected to one side of the charging box, the tensile tester is fixedly connected to the side of the charging box close to the mobile seat, the spring is fixedly connected between the tensile tester and the mobile seat, the take-up device is rotatably connected to the side of the mobile seat away from the charging box through the connecting seat, the charging wire is wound on the take-up device, the drive module is arranged on the side of the mobile seat away from the charging box, the drive module is used for driving the take-up device to rotate, and the indicator lamp is installed on the mobile seat.

[0015] The present application has at least the following kinds of beneficial effects relative to the prior art: the symmetrically distributed elastic members commonly drive the fixed plate to move, and then drive the charging gun to move synchronously, the charging gun is separated from the charging port of the forklift when the charging is completed, and the staff does not separate the charging gun from the charging port of the forklift before starting the forklift, so as to avoid the damage of the charging gun and the charging port of the forklift.

[0016] The fixed plate and other parts connected thereto are covered by the protective shell, thereby protecting each part connected to the charging gun, avoiding the parts of the device from falling to the ground when the charging gun is separated from the port, causing damage to each part of the device due to impact, and even causing the charging gun to be deformed due to impact, affecting the normal use of the charging gun.

[0017] The tension tester detects the tension on the moving seat, that is, the resistance of the charging wire during the retraction process, sequentially determines whether the charging wire is affected by external force and cannot be retracted normally, and releases the charging wire wound on the take-up device when the charging wire cannot be retracted normally, avoiding damage to the charging wire due to tension. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of the three-dimensional structure of the present application;

[0019] Figure 2 is a sectional view of the three-dimensional structure of the protective shell of the present application;

[0020] Figure 3 is a sectional view of the three-dimensional structure of the driving ring of the present application;

[0021] Figure 4 is a sectional view of the three-dimensional structure of the mounting shell of the present application;

[0022] Figure 5 is a schematic view of the three-dimensional structure of the positioning plate and the limiting groove of the present application;

[0023] Figure 6 is a sectional view of the three-dimensional structure of the liquid storage shell and the piston rod of the present application;

[0024] Figure 7 is a schematic view of the three-dimensional structure of the connecting rod and the pawl of the present application;

[0025] Figure 8 is a schematic view of the three-dimensional structure of the tension tester and the take-up device of the present application.

[0026] Names and serial numbers of parts in the figure:

[0027] 1, charging box, 2, charging line, 3, charging gun, 301, fixed plate, 4, guide plate, 5, elastic piece, 6, installation shell, 7, intercept block, 8, extrusion rod; 9, fixed rod, 10, connecting shell, 11, moving column, 12, positioning plate, 13, limiting groove, 14, resistance wire; 15, drive ring, 17, extrusion block, 18, drive rod, 19, connecting rod, 20, pawl, 21, ratchet wheel; 22, moving ring, 23, hydraulic push rod, 24, liquid storage shell, 25, piston rod, 26, limiting block, 27, moving rod; 28, threaded rod, 29, protection shell; 30, moving seat, 31, tension tester, 32, take-up device. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] Embodiment 1

[0030] Considering that the existing forklift charging device cannot disconnect the charging gun from the forklift charging port after charging is completed, when the worker starts the forklift without disconnecting the charging gun from the port, the forklift will drag the charging line to a straight state during movement, causing the straightened charging line to break due to inability to withstand the tension, causing damage to the charging line, and the charging gun and the port may also be damaged due to the dragging of the charging line, resulting in the charging gun and the port being deformed due to tension. The present application proposes the following forklift charging device.

[0031] As Figures 1-4As shown, the charging device of the forklift comprises a charging box 1, the front side of the charging box 1 is provided with a control terminal, the charging box 1 is provided with a charging wire 2, the end of the charging wire 2 away from the charging box 1 is provided with a charging gun 3, the control terminal supplies current to the charging gun 3 through the charging box 1 and the charging wire 2, the charging gun 3 is fixedly connected with a fixed plate 301, the charging gun 3 is slidingly connected with two guide plates 4 which are symmetrically distributed, the upper sides of the two guide plates 4 are fixedly connected through a connecting rod, the elastic members 5 are fixedly connected between the two guide plates 4 and the fixed plate 301, the elastic members 5 are tension springs, the elastic members 5 are used for maintaining the relative position of the guide plates 4 and the fixed plate 301 at the initial time, and driving the fixed plate 301 after moving to reset to the initial position, at the same time, driving the charging gun 3 to disconnect with the charging port of the forklift, the middle parts of the two guide plates 4 away from each other are fixedly connected with mounting shells 6, the mounting shells 6 are slidingly connected with intercepting blocks 7 inside, the intercepting blocks 7 penetrate through the adjacent guide plates 4 and are slidingly connected with the same, springs are arranged between the intercepting blocks 7 and the adjacent guide plates 4, and are used for maintaining the initial position of the adjacent intercepting blocks 7 and driving the intercepting blocks 7 after moving to reset to the initial position, the two intercepting blocks 7 are limitingly matched with the fixed plate 301, the two intercepting blocks 7 cooperatively limit the fixed plate 301 and other parts connected with the same, to ensure the smooth progress of the charging process, the mounting shells 6 are penetratingly and slidingly connected with extrusion rods 8, the extrusion rods 8 are extrusionally matched with the adjacent intercepting blocks 7, the symmetrically distributed extrusion rods 8 respectively drive the adjacent intercepting blocks 7 to synchronously move in the process of approaching each other, the mounting shells 6 are provided with limiting mechanisms, and the limiting mechanisms are used for maintaining the positions of the adjacent intercepting blocks 7.

[0032] As Figure 4 and Figure 5As shown, the limiting mechanism includes a fixed rod 9, the guide plate 4 is fixedly connected with a connecting rod, the fixed rod 9 is rotatably connected with the connecting rod of the adjacent guide plate 4, the fixed rod 9 and the connecting rod on the adjacent guide plate 4 are fixedly connected with a torsion spring, which is used to drive the fixed rod 9 to reset to the initial position after rotation, one end of the fixed rod 9 away from the adjacent guide plate 4 is fixedly connected with a connecting shell 10, the inside of the connecting shell 10 is slidably connected with a moving column 11, the moving column 11 and the adjacent connecting shell 10 are fixedly connected with a spring, which is used to maintain the initial position of the adjacent moving column 11 and drive the moving column 11 to reset to the initial position after moving, the side of the intercepting block 7 close to the adjacent fixed rod 9 is fixedly connected with a positioning plate 12, the positioning plate 12 is provided with a limiting groove 13, the moving column 11 slides in the adjacent limiting groove 13, the limiting groove 13 is composed of two half-heart-shaped grooves distributed symmetrically from front to back, the two adjacent half-heart-shaped grooves are communicated with each other, and the top of the two adjacent half-heart-shaped grooves is provided with an inclined surface, the distance between the half-heart-shaped groove inclined surface and the adjacent intercepting block 7 decreases with the decrease of the distance between them and the adjacent guide plate 4, wherein the distance between the two adjacent half-heart-shaped grooves away from the adjacent guide plate 4 and the adjacent intercepting block 7 is greater than the distance between the two adjacent half-heart-shaped grooves close to the adjacent guide plate 4 and the adjacent intercepting block 7, at the beginning, the moving column 11 contacts the position of the adjacent limiting groove 13 close to the adjacent guide plate 4, that is, at the beginning, the moving column 11 contacts the intersection of the two adjacent half-heart-shaped grooves close to the adjacent guide plate 4, in the process of moving the adjacent limiting groove 13 by the positioning plate 12, the limiting groove 13 extrudes the adjacent moving column 11, so that the moving column 11 moves along the adjacent limiting groove 13, and at the same time, the adjacent fixed rod 9 and the adjacent connecting shell 10 are synchronously rotated, the side of the intercepting block 7 close to the adjacent extrusion rod 8 is fixedly connected with a resistance wire 14, the mounting shell 6, the adjacent intercepting block 7 and the adjacent extrusion rod 8 cooperatively form a sealed cavity, the sealed cavity is filled with a heat-sensitive gas, the resistance wire 14 is located in the adjacent sealed cavity, the resistance wire 14 is electrically connected with a control terminal, the resistance wire 14 generates heat under the control of the control terminal, thereby increasing the volume of the heat-sensitive gas, the lower sides of the two guide plates 4 are commonly provided with a fixed assembly, the fixed assembly is used to connect the symmetrically distributed guide plates 4 with the charging port of the forklift.

[0033] As Figure 2 , Figure 3 and Figure 7As shown, the fixing assembly comprises a driving ring 15 threadedly connected to the lower sides of the two guide plates 4, the lower sides of the two guide plates 4 are each limited slidingly connected with an extrusion block 17 made of elastic deformable material, the extrusion block 17 is in extrusion fit with the charging port of the forklift, the two extrusion blocks 17 are cooperatively fitted to fix the device to the charging port of the forklift, the lower sides of the two guide plates 4 are each provided with a through slot, the through slot of the guide plate 4 is slidingly connected with a driving rod 18, the driving rod 18 is limited slidingly connected with the driving ring 15, the extrusion block 17 is provided with an inclined slot, the distance between the inclined slots on the two extrusion blocks 17 gradually increases from bottom to top, the driving rod 18 slides in the inclined slots of the adjacent extrusion blocks 17, in the process of upward movement of the driving ring 15, the two driving rods 18 are synchronously moved upward, and then the two driving rods 18 extrude the adjacent extrusion blocks 17 to make the two extrusion blocks 17 close to each other, the upper side of the driving ring 15 is rotationally connected with a connecting rod 19, the upper side of the connecting rod 19 is slidingly connected with a pawl 20, a spring is arranged between the pawl 20 and the connecting rod 19 for maintaining the initial position of the pawl 20 and resetting the moved pawl 20 to the initial position, the middle portions of the two guide plates 4 are cooperatively slidingly connected with a ratchet wheel 21, the ratchet wheel 21 is limitedly fitted with the pawl 20 for synchronously limiting the pawl 20 and other parts connected thereto, thereby limiting the driving ring 15, a torsion spring is fixed between the ratchet wheel 21 and the driving ring 15 for resetting the driving ring 15 to the initial position after rotation.

[0034] As Figure 3 , Figure 4 and Figure 6As shown, the ratchet wheel 21 is slidingly connected with a moving ring 22, the height of the moving ring 22 is less than the height of the ratchet wheel 21, and the moving ring 22 is in extrusion fit with the pawl 20, the moving ring 22 extrudes the pawl 20 in the process of moving downward, so that the pawl 20 moves downward, and then the ratchet wheel 21 loses contact with the pawl 20, that is, the driving ring 15 can reset to the initial position under the action of the torsional spring, the upper side of the ratchet wheel 21 is fixedly connected with two hydraulic push rods 23 which are symmetrically distributed left and right, the extension ends of the two hydraulic push rods 23 are fixedly connected with the moving ring 22, and the moving ring 22 is driven to move downward by the extension ends of the two hydraulic push rods 23, the upper side of each of the two guide plates 4 is fixedly connected with a liquid storage shell 24, the inside of the liquid storage shell 24 is filled with hydraulic oil, the liquid storage shell 24 is in communication with the fixed part of the adjacent hydraulic push rod 23 through a connecting pipe, the hydraulic oil in the liquid storage shell 24 is transported into the fixed part of the adjacent hydraulic push rod 23 through the adjacent connecting pipe, the inside of the liquid storage shell 24 is slidingly connected with a piston rod 25, the piston rod 25 is used for extruding the hydraulic oil in the liquid storage shell 24, so that the hydraulic oil in the liquid storage shell 24 flows outward, a spring is arranged between the piston rod 25 and the adjacent liquid storage shell 24, which is used for maintaining the initial position of the piston rod 25 and driving the moved piston rod 25 to reset to the initial position, the piston rod 25 penetrates through the fixed plate 301 and is slidingly connected therewith, the lower end of the piston rod 25 is slidingly connected with a limiting block 26, the limiting block 26 is provided with an inclined surface, the distance between the inclined surface on the limiting block 26 and the fixed plate 301 gradually increases from back to front, the limiting block 26 is in limiting fit with the fixed plate 301, and the inclined surface on the limiting block 26 is in extrusion fit with the fixed plate 301, in the process of moving the fixed plate 301 downward, the fixed plate 301 extrudes the inclined surfaces on the two limiting blocks 26, so that the two limiting blocks 26 respectively slide into the adjacent piston rod 25, a spring is fixedly connected between the limiting block 26 and the adjacent piston rod 25, which is used for maintaining the initial position of the adjacent limiting block 26 and driving the moved limiting block 26 to reset to the initial position, the front side of the fixed plate 301 is slidingly connected with two moving rods 27 which are symmetrically distributed left and right, the moving rod 27 extrudes the adjacent limiting block 26, so that the limiting block 26 moves into the adjacent piston rod 25, and a spring is fixedly connected between the moving rod 27 and the fixed plate 301, which is used for maintaining the initial position of the moving rod 27 and driving the moved moving rod 27 to reset to the initial position, the positions close to the two piston rods 25 of the fixed plate 301 are provided with sliding grooves, the sliding groove on the fixed plate 301 is in extrusion fit with the adjacent limiting block 26, in the process of moving the fixed plate 301 upward, when the fixed plate 301 moves upward to the position where the sliding groove thereon is in contact with the limiting block 26, the two limiting blocks 26 are synchronously moved by the fixed plate 301, and then the two piston rods 25 are synchronously moved upward, so that the hydraulic oil in the two liquid storage shells 24 is extruded outward, the spring between the piston rod 25 and the adjacent liquid storage shell 24 has an elastic coefficient smaller than that of the adjacent elastic member 5,Avoid the fixed plate 301 unable to pass through two limit block 26 drive belt two piston rod 25 synchronous movement.

[0035] When the electric forklift needs to be charged using the device, the worker moves the forklift to the designated position, then opens the forklift charging port (the following is described by taking the port as an example), then the worker takes off the charging gun 3 from the charging box 1, and drags the charging wire 2 to the appropriate length, then the worker sets the two extrusion blocks 17 on both sides of the port, and adjusts the two extrusion blocks 17 to the appropriate position by the worker, then the worker rotates the drive ring 15, and the drive ring 15 moves upward during rotation by cooperating with the two guide plates 4.

[0036] The drive ring 15 drives the two drive rods 18 to move upward synchronously during upward movement, and the two drive rods 18 respectively extrude the inclined grooves on the adjacent extrusion blocks 17, so that the two extrusion blocks 17 are close to each other, and after the opposite sides of the two extrusion blocks 17 are tightly fitted with the port, the worker no longer rotates the drive ring 15, and the two extrusion blocks 17 are cooperated with each other to fix the device on the port.

[0037] During the upward movement of the drive ring 15 described above, the drive ring 15 drives the ratchet 21 and other parts connected thereto to move upward synchronously through the torsional spring, and the drive ring 15 drives the connecting rod 19 and other parts connected thereto to move upward synchronously, during the rotation of the drive ring 15, the drive ring 15 drives the pawl 20 to rotate synchronously through the connecting rod 19, and rotates the torsional spring between the drive ring 15 and the ratchet 21, and the ratchet 21 limits the pawl 20 (both the ratchet 21 and the pawl 20 are existing devices, and their relative working procedures are not described), that is, the drive ring 15 is limited, avoiding the drive ring 15 driving other parts connected thereto to reset to the initial position under the action of the torsional spring, that is, avoiding the two extrusion blocks 17 and the port are separated, which causes the device to be unable to be fixed on the port, and affects the subsequent work.

[0038] After the two pressing blocks 17 are fixed on the port, the worker presses the charging gun 3 downward, and the two elastic members 5 are synchronously stretched to store energy. The charging gun 3 drives other parts connected thereto to move downward synchronously. When the fixed plate 301 moves downward to the position where it is in contact with the two limiting blocks 26, the fixed plate 301 continues to move downward to press the inclined surfaces of the two limiting blocks 26, so that the two limiting blocks 26 move into the adjacent piston rods 25 respectively, and the adjacent springs are compressed to store energy. When the two limiting blocks 26 are in cooperation with the adjacent sliding grooves on the fixed plate 301, the fixed plate 301 no longer presses the two limiting blocks 26. The two limiting blocks 26 are reset to the initial positions under the action of the adjacent springs respectively. When the charging gun 3 moves downward to the position where it is in cooperation with the port, the upper side of the fixed plate 301 moves downward to the position where it is flush with the lower side of the intercepting block 7. Then the worker no longer moves the charging gun 3.

[0039] After the worker no longer moves the charging gun 3, the worker presses the two pressing rods 8 simultaneously. The two pressing rods 8 drive the adjacent intercepting blocks 7 to move close to each other respectively, and compress the springs between the intercepting blocks 7 and the adjacent guide plates 4 to store energy. At the same time, the intercepting blocks 7 drive the adjacent positioning plates 12 to move synchronously. The movement process of the right positioning plate 12 is described as follows:

[0040] During the movement of the right positioning plate 12 to the left, the positioning plate 12 drives the limiting grooves 13 thereon to move synchronously, so that the right moving column 11 moves along any one of the half-heart-shaped grooves in the adjacent limiting grooves 13 (the right rear half-heart-shaped groove is described as an example below). The right moving column 11 drives the adjacent fixed rod 9 to rotate through the transmission of the adjacent connecting shell 10, so as to rotate the torsional spring between the fixed rod 9 and the connecting rod on the adjacent guide plate 4 to store energy. At the same time, the moving column 11 moves downward under the pressure of the inclined surface of the right rear half-heart-shaped groove in the right limiting groove 13, and compresses the spring between the moving column 11 and the adjacent connecting shell 10 to store energy. When the right pressing rod 8 moves to the limit position to the left, the moving column 11 is located at the rightmost position of the right rear half-heart-shaped groove in the right limiting groove 13, and the right moving column 11 moves to the limit position downward synchronously. That is, the spring between the right moving column 11 and the adjacent connecting shell 10 is compressed to the limit state. Then the worker releases the right pressing rod 8. The right intercepting block 7 drives other parts connected thereto to move to the right under the action of the adjacent spring. At the same time, the torsional spring between the connecting rod on the right guide plate 4 and the adjacent fixed rod 9 resets to the initial state, so as to make the right fixed rod 9 drive other parts connected thereto to swing to the initial position. At the same time, the right moving column 11 and other parts connected thereto limit the adjacent positioning plate 12, so that the right positioning plate 12 drives the intercepting block 7 connected thereto to be unable to reset to the initial position completely under the action of the adjacent spring.

[0041] Until the fixed rod 9 and other parts connected thereto swing to the initial position, the right moving column 11 moves to the position of contacting the right side of the intersection of the two half heart-shaped grooves on the right limiting groove 13, at this time, the right moving column 11 is limited by the right side of the intersection of the two half heart-shaped grooves on the adjacent limiting groove 13, so that the height of the right moving column 11 is lower than the height when it is in the initial position, at the same time, the right positioning plate 12 and the right intercepting block 7 no longer move to the right, and the movement process of the left intercepting block 7 and other parts connected thereto is as described above. Through the cooperation of the two intercepting blocks 7, the fixed plate 301 is limited, that is, the charging gun 3 is limited, and the charging gun 3 is fixed at the position matched with the port.

[0042] After the above-mentioned two extrusion rods 8 are loosened by the staff, the staff starts the control terminal on the charging box 1, and the control terminal performs timed charging on the forklift according to the residual power of the forklift battery, and at the same time, the control terminal supplies current to the two resistance wires 14 to make the two resistance wires 14 generate heat, and then the gas in the two sealed cavities expands, that is, the two extrusion rods 8 move away from each other under the action of the expanding gas, until the two extrusion rods 8 are reset to the initial position.

[0043] After the above-mentioned two extrusion rods 8 are reset to the initial position, the gas in the two sealed cavities expands again, so that the two intercepting blocks 7 move close to each other under the extrusion force, and then the two intercepting blocks 7 drive the other parts connected thereto to move synchronously to the limit position, and the two moving columns 11 move to the position close to the adjacent extrusion rod 8 in any one half heart-shaped groove on the adjacent limiting groove 13, and the two moving columns 11 move downward to the limit position (the specific process will not be described in detail, please refer to the above description).

[0044] After the charging is completed, the charging gun 3 stops supplying power to the port, and at the same time, the control terminal no longer supplies current to the two resistance wires 14, so that the two resistance wires 14 cool down, that is, the temperature in the two sealed cavities gradually decreases, and then the gas in the two sealed cavities gradually returns to the initial volume. During this process, the two intercepting blocks 7 begin to gradually drive the other parts connected thereto to reset synchronously to the initial position under the action of the adjacent springs (the specific process can be referred to the process of the two intercepting blocks 7 moving close to each other, which will not be described in detail), until the two intercepting blocks 7 reset synchronously to the initial position, and the two intercepting blocks 7 lose contact with the fixed plate 301, that is, the two intercepting blocks 7 no longer limit the fixed plate 301.

[0045] After the two intercepting blocks 7 lose contact with the fixed plate 301, the fixed plate 301 is driven by the two elastic members 5 to move upward synchronously, so that the charging gun 3 is separated from the port. When the fixed plate 301 moves to a position where the two limiting blocks 26 are in contact, the fixed plate 301 drives the two piston rods 25 to move upward synchronously through the transmission of the two limiting blocks 26. Then, the two piston rods 25 respectively transport the hydraulic oil in the adjacent liquid storage shell 24 to the fixed part of the adjacent hydraulic push rod 23 through the adjacent connecting pipe, so that the extension end of the two hydraulic push rods 23 moves downward synchronously, and the extension end of the two hydraulic push rods 23 drives the moving ring 22 to move downward. The moving ring 22 extrudes the pawl 20, so that the pawl 20 moves downward along the connecting rod 19. When the fixed plate 301 moves to the limit position, the two piston rods 25 move to the limit position synchronously, and the moving ring 22 and other connected parts move to the limit position synchronously downward. That is, the lower side of the moving ring 22 is flush with the lower side of the ratchet wheel 21, and the pawl 20 loses contact with the ratchet wheel 21.

[0046] After the pawl 20 loses contact with the ratchet wheel 21, the ratchet wheel 21 cannot limit the pawl 20, that is, the driving ring 15 and other connected parts can reset to the initial position under the action of the adjacent torsional spring. That is, the two extrusion blocks 17 are separated from the port, and the charging gun 3 is separated from the port, so as to avoid the damage of the charging gun 3 and the forklift charging port caused by the start of the forklift without separating the charging gun 3 from the forklift charging port.

[0047] After the charging gun 3 is separated from the port, the staff presses the two moving rods 27 in sequence, so that the moving rod 27 moves forward and compresses the adjacent spring to store power. When the moving rod 27 moves to the position where the adjacent limiting block 26 is in contact, the moving rod 27 extrudes the adjacent limiting block 26 in the process of continuous movement, so that the limiting block 26 moves into the adjacent piston rod 25, and the spring between the limiting block 26 and the adjacent piston rod 25 is compressed to store power. When the moving rod 27 moves to the limit position, the limiting block 26 moves completely into the piston rod 25, that is, the piston rod 25 is no longer limited by the fixed plate 301 (at this time, the limiting block 26 is in sliding fit with the fixed plate 301), so that the piston rod 25 can reset to the initial position under the action of the adjacent spring. Then, the hydraulic oil in the fixed part of the two hydraulic push rods 23 is pumped back into the adjacent liquid storage shell 24, so that the moving ring 22 and other connected parts reset to the initial position synchronously for subsequent use. In the process of resetting of the two piston rods 25 downward, the two piston rods 25 drive the adjacent limiting block 26 to move synchronously. When the two limiting blocks 26 move to the position where the fixed plate 301 loses contact, the two limiting blocks 26 reset to the initial position under the action of the adjacent spring.

[0048] Example 2:

[0049] On the basis of embodiment 1, as shown in Figure 1 and Figure 2 The threaded rod 28 is further provided, the charging gun 3 is fixed with two connection plates which are symmetrically distributed in front and back, the threaded rod 28 is rotationally connected to the connection plate on the front side of the charging gun 3, the two connection plates on the charging gun 3 are jointly and slidably connected with the protective shell 29, the protective shell 29 is threadedly connected with the threaded rod 28, the threaded rod 28 drives the protective shell 29 to move up and down through the thread on the threaded rod 28 in the process of rotation, the inner diameter of the protective shell 29 is greater than the outer diameter of the moving ring 22, so that the protective shell 29 can move smoothly, and then the charging gun 3 and other parts connected thereto are covered and protected by the protective shell 29.

[0050] After the charging gun 3 is connected with the port, the worker rotates the threaded rod 28, drives the protective shell 29 to move downward to the limit position through the thread on the threaded rod 28, and then stops rotating the threaded rod 28, so that each part on the device is covered by the protective shell 29, thereby protecting each part on the device, avoiding that each part of the device falls to the ground when the device is separated from the port after the subsequent charging is completed, so that each part of the device is damaged due to impact, and even the charging gun 3 is deformed due to impact, thereby affecting the normal use of the charging gun 3.

[0051] Embodiment 3:

[0052] Considering that in the process of charging the forklift, since the length of the charging wire is usually greater than the distance between the charger and the forklift, the excess charging wire will accumulate between the forklift and the charger when the charger is used, and even will slide under the tire of the forklift, if the worker starts the forklift without moving the charging wire under the tire of the forklift, the forklift will cause the charging wire to be crushed during movement, thereby causing damage or rupture of the charging wire insulation, and affecting the use of the charging wire.

[0053] As shown in Figure 1 and Figure 8Also shown, the mobile seat 30 is slidingly connected to the upper side of the charging box 1, the upper side of the charging box 1 is fixedly connected with the tension tester 31 electrically connected with the control terminal, the spring is fixedly connected between the tension tester 31 and the mobile seat 30, used to maintain the initial position of the mobile seat 30, and drive the mobile seat 30 after movement to reset to the initial position, and the tension tester 31 is used to detect the tension of the mobile seat 30, the upper side of the mobile seat 30 is rotatably connected with the take-up device 32 through the connecting seat, the charging cord 2 is wound on the take-up device 32, and the take-up device 32 is used to control the winding and unwinding of the charging cord 2, the upper side of the mobile seat 30 is provided with a driving module electrically connected with the control terminal, the driving module is used to drive the take-up device 32 to rotate, the driving module is an existing device, and in the figure, a self-locking motor, two belt pulleys and a belt are taken as an example to show, wherein the self-locking motor is fixedly connected to the upper side of the mobile seat 30, the two belt pulleys are respectively fixedly connected to the output shaft of the self-locking motor and the rotating shaft of the take-up device 32, and the belt is sleeved on the two belt pulleys, the upper side of the mobile seat 30 is provided with an indicating lamp electrically connected with the control terminal, used to remind the staff that the charging cord 2 cannot be successfully wound back.

[0054] In the process of pulling the charging cord 2, the control terminal starts the driving module, the take-up device 32 is driven to rotate by the driving module, the charging cord 2 wound on the take-up device 32 is unwound, and after a sufficient length of the charging cord 2 is unwound, the control terminal stops the driving module, and the take-up device 32 is fixed at this position.

[0055] Until the forklift is fully charged, and after the charging gun 3 is separated from the port, the control terminal starts the driving module, the take-up device 32 is reversely rotated by the driving module, and then the unwound cord is rewound thereon, and the tension of the mobile seat 30 is detected by the tension tester 31, that is, the resistance of the charging cord 2 during winding back is detected, when the value detected by the tension tester 31 increases to a certain value, it is proved that the charging cord 2 cannot be normally wound back due to the action of external force, and at this time, the charging cord 2 outside the take-up device 32 is in a straightened state under the tension of the take-up device 32, then the control terminal controls the driving module to drive the take-up device 32 to rotate, the charging cord 2 wound on the take-up device 32 is unwound, and the charging cord 2 outside the take-up device 32 is changed from the tight state to the relaxed state, avoiding damage of the charging cord 2 due to tension.

[0056] At the same time that the control terminal unwinds the charging cord 2 wound on the take-up device 32, the control terminal starts the indicating lamp, the indicating lamp flashes, used to remind the staff that the charging cord 2 cannot be normally wound back, and the staff recovers the charging cord 2, and judges the reason why the charging cord 2 cannot be wound back, after the charging cord 2 is wound back, the staff turns off the indicating lamp through the control terminal for subsequent use.

[0057] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and the improvement concept of the present application, makes equivalent replacement or change within the technical scope disclosed by the present application, should be covered within the protection scope of the present application.

Claims

1. A charging device for a forklift, comprising a charging box (1), wherein a charging cable (2) is disposed on the charging box (1), and a charging gun (3) is installed at one end of the charging cable (2) away from the charging box (1), characterized in that, It also includes a fixing plate (301), which is fixedly connected to the charging gun (3). The charging gun (3) is slidably connected to symmetrically distributed guide plates (4). The symmetrically distributed guide plates (4) are fixedly connected by connecting rods. Elastic elements (5) are fixedly connected between the symmetrically distributed guide plates (4) and the fixing plate (301). Mounting shells (6) are fixedly connected to opposite sides of the symmetrically distributed guide plates (4). An intercepting block (7) is slidably connected inside the mounting shell (6). Block (7) passes through the adjacent guide plate (4) and is slidably connected to it. A spring is provided between the intercepting block (7) and the adjacent guide plate (4). The symmetrically distributed intercepting blocks (7) are all limited to the fixed plate (301). The mounting shell (6) is slidably connected to the extrusion rod (8). The extrusion rod (8) is extruded to the adjacent intercepting block (7). A limiting mechanism is provided on the mounting shell (6). The limiting mechanism is used to maintain the position of the adjacent intercepting blocks (7). The limiting mechanism includes a fixed rod (9), a connecting rod fixedly connected to the guide plate (4), the fixed rod (9) being rotatably connected to the connecting rod of the adjacent guide plate (4), the fixed rod (9) and the connecting rod on the adjacent guide plate (4) being jointly fixedly connected to a torsion spring, a connecting shell (10) being fixedly connected to the end of the fixed rod (9) away from the adjacent guide plate (4), a moving column (11) being slidably connected inside the connecting shell (10), and a spring being fixedly connected between the moving column (11) and the adjacent connecting shell (10). A positioning plate (12) is fixed to the side of the block (7) near the adjacent fixed rod (9). A limiting groove (13) is provided on the positioning plate (12). The moving column (11) slides in the adjacent limiting groove (13). A resistance wire (14) is fixed to the side of the block (7) near the adjacent extrusion rod (8). A fixing component is provided on the side of the symmetrically distributed guide plates (4) away from the fixed plate (301). The fixing component is used to connect the symmetrically distributed guide plates (4) to the forklift charging port. The mounting shell (6), the adjacent intercepting block (7), and the adjacent extrusion rod (8) cooperate to form a sealed cavity, which is filled with a thermosensitive gas, and the resistance wire (14) is located in the adjacent sealed cavity; The limiting groove (13) is composed of symmetrically distributed semi-heart-shaped grooves. Adjacent and symmetrically distributed semi-heart-shaped grooves are interconnected, and each symmetrically distributed semi-heart-shaped groove is provided with an inclined surface. The distance between the inclined surface of the semi-heart-shaped groove and the adjacent intercepting block (7) decreases as the distance between it and the adjacent guide plate (4) decreases. The fixing assembly includes a drive ring (15), which is threadedly connected to the side of the symmetrically distributed guide plates (4) away from the fixing plate (301). Each of the symmetrically distributed guide plates (4) away from the fixing plate (301) has a limiting sliding connection to a pressing block (17). The pressing block (17) is pressed into the forklift charging port. Each of the symmetrically distributed guide plates (4) has a through groove, and a drive rod (18) is slidably connected within the through groove of each guide plate (4). The drive rod (18) is limited and slidably connected to the drive ring (15). The pressing block (17) is provided with an inclined... The inclined groove, the drive rod (18) slides in the inclined groove of the adjacent extrusion block (17), the drive ring (15) is rotatably connected to the connecting rod (19) on the side near the fixed plate (301), the connecting rod (19) is slidably connected to the pawl (20) on the side near the fixed plate (301), a spring is provided between the pawl (20) and the connecting rod (19), the guide plates (4) are symmetrically distributed in the middle and are slidably connected to the ratchet (21), the ratchet (21) is limited to the pawl (20), and a torsion spring is fixed between the ratchet (21) and the drive ring (15); It also includes a movable base (30), which is slidably connected to one side of the charging box (1). A tensile tester (31) is fixedly connected to the side of the charging box (1) near the movable base (30). A spring is fixedly connected between the tensile tester (31) and the movable base (30). A take-up coil (32) is rotatably connected to the side of the movable base (30) away from the charging box (1) through a connecting seat. The charging cable (2) is wound around the take-up coil (32). A drive module is provided on the side of the movable base (30) away from the charging box (1). The drive module is used to drive the take-up coil (32) to rotate. An indicator light is installed on the movable base (30).

2. A charging device for a forklift according to claim 1, characterized in that, The distance between the inclined grooves on the symmetrically distributed extrusion blocks (17) increases as the distance between them and the charging gun (3) decreases.

3. A charging device for a forklift according to claim 1, characterized in that, The ratchet (21) is slidably connected to a movable ring (22), and the movable ring (22) is pressed into the pawl (20). A symmetrically distributed hydraulic push rod (23) is fixedly connected to the side of the ratchet (21) near the fixed plate (301). The telescopic ends of the symmetrically distributed hydraulic push rods (23) are all fixedly connected to the movable ring (22). A liquid storage shell (24) is fixedly connected to the side of the symmetrically distributed guide plate (4) away from the adjacent extrusion block (17). The liquid storage shell (24) is connected to the fixed part of the adjacent hydraulic push rod (23) through a connecting pipe. A piston rod (25) is slidably connected inside the liquid storage shell (24). A spring is provided between the piston rod (25) and the adjacent liquid storage shell (24). The piston rod (25) passes through the fixed plate (301). A fixed plate (301) is slidably connected to it. A limit block (26) is slidably connected to one end of the piston rod (25) near the adjacent extrusion block (17). The limit block (26) is limited to the fixed plate (301). A spring is fixed between the limit block (26) and the adjacent piston rod (25). A symmetrically distributed moving rod (27) is slidably connected to one side of the fixed plate (301). The moving rod (27) is extruded to the adjacent limit block (26). A spring is fixed between the moving rod (27) and the fixed plate (301). A sliding groove is provided on the fixed plate (301) near the symmetrically distributed piston rod (25). The sliding groove on the fixed plate (301) is extruded to the adjacent limit block (26).

4. A charging device for a forklift according to claim 3, characterized in that, The spring coefficient between the piston rod (25) and the adjacent liquid storage shell (24) is less than that of the adjacent elastic element (5), so that the fixed plate (301) drives the symmetrically distributed piston rods (25) to move synchronously.

5. A charging device for a forklift according to claim 1, characterized in that, It also includes a threaded rod (28), the charging gun (3) is fixedly connected to symmetrically distributed connecting plates, the threaded rod (28) is rotatably connected to one of the connecting plates of the charging gun (3), the symmetrically distributed connecting plates on the charging gun (3) are slidably connected to a protective shell (29), and the protective shell (29) is threadedly connected to the threaded rod (28).

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