Electric forklift and pull-out type charging seat cabin thereof

Abstract

The invention relates to the technical field of forklift charging seat bins, and discloses an electric forklift and a pull-out type charging seat bin thereof, and the pull-out type charging seat bin comprises two sets of guide rails which are arranged on a forklift frame in parallel and extend in the width direction of the forklift frame; the at least two groups of electrodes are arranged at the top of one end, far away from the battery, of one group of guide rails, are distributed at intervals in an up-down insulation manner and are connected with the input end of the battery through cables; the drawing seat is connected with the two groups of guide rails in a sliding manner; and an anode copper bar and a cathode copper bar are arranged at the output end of the charging seat. The mode that the pull-out type charging seat bin is arranged in the width direction of the forklift frame is adopted, on one hand, structural parts of a forklift body do not need to be changed, and changing is convenient and fast; and on the other hand, the charging seat bin is compact in structure and convenient to operate, bending of the cable is avoided, and the charging safety and reliability are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of forklift charging seats, and in particular to an electric forklift and a pull-out charging seat. Background Art

[0002] Endurance is one of the factors that users consider when choosing an electric forklift. Therefore, the battery capacity is maximized based on the body layout during development. At present, 80V voltage level platform electric forklifts are the mainstream products in the low-end market. The existing forklift battery charger supplies 80V DC power to the battery pack, with a maximum current value of 200A. Therefore, electric forklifts that are usually equipped with batteries with a capacity of more than 500Ah need to consider equipping them with dual chargers to shorten the charging time to less than 2.5h, thereby improving endurance in disguise.

[0003] With the current policy orientation, the oil-to-electric conversion market is booming, and with the cost of the three-electric system decreasing, the demand for low-cost electric forklifts developed based on the internal combustion platform is increasing. The principle of oil-to-electric conversion of forklifts: try not to move the structural parts, especially the structural parts that are highly correlated with the body strength. The internal combustion platform and the electric platform are quite different. During development, you may encounter the problem of not being able to arrange the dual-gun charging station in the longitudinal dimension of the body. If you change the frame and overhead guard structure safety parts, you need to add a series of design calculations, test verification and other processes, as well as redevelopment of structural parts, which greatly increases the cost of the conversion. That is, there are problems in the existing technology that oil-to-electric conversion of forklifts is difficult and complex. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems of difficulty and high complexity in converting forklifts from oil to electricity in the prior art, and to provide an electric forklift and a pull-out charging seat, which have the function of simple and convenient conversion from oil to electricity.

[0005] In order to achieve the above-mentioned object, the present invention provides, on one hand, a pull-out charging seat for an electric forklift, comprising:

[0006] Two sets of guide rails are arranged in parallel on the forklift frame and extend along the width direction of the forklift frame;

[0007] At least two groups of electrodes are arranged on the top of one end of one group of the guide rails away from the battery and are distributed in an upper and lower insulating manner. The at least two groups of electrodes are connected to the input end of the battery through a cable;

[0008] A drawer seat, slidably connected to the two sets of guide rails;

[0009] At least one set of charging seats, the output end of the charging seat is provided with a positive copper bar and a negative copper bar, the positive copper bar and the negative copper bar are distributed in parallel up and down and are slidably connected with the corresponding electrodes, and the positive copper bar and the negative copper bar are provided with a conductive area at one end away from the charging seat, and the conductive area is used to contact and conduct with the corresponding electrodes when the pull-out seat slides out along the two sets of guide rails.

[0010] Optionally, the outer surfaces of the ends of the positive copper bar and the negative copper bar close to the charging seat and the middle section are plated with a wear-resistant insulating layer to form a conductive area at the ends of the positive copper bar and the negative copper bar away from the charging seat.

[0011] Optionally, the guide rail is in an inverted L-shape, and a plurality of groups of first bearings are rotatably arranged on a vertical section of the guide rail, and the plurality of groups of first bearings are arranged in a horizontal array.

[0012] Optionally, the pull-out seat comprises:

[0013] A pull-out plate, slidably disposed between the plurality of groups of the first bearings and the horizontal section of the guide rail;

[0014] A first mounting plate is arranged on the top of the pull-out plate, and the charging seat is arranged and fixedly penetrates the first mounting plate;

[0015] A panel is arranged at one end of the drawer plate away from the battery, and a panel lock is arranged on the panel.

[0016] Optionally, the number of the electrodes includes four groups, and the number of the charging bases includes two groups.

[0017] Optionally, the negative copper busbar and the positive copper busbar of one group of the charging base are slidably connected to the corresponding two groups of electrodes in the middle, and the negative copper busbar and the positive copper busbar of another group of the charging base are slidably connected to the corresponding two groups of electrodes.

[0018] Optionally, the spacing between the two groups of positive copper bars and the spacing between the two groups of negative copper bars are both smaller than the spacing between the positive copper bar and the negative copper bar.

[0019] Optionally, the pull-out seat further includes:

[0020] A first mounting seat is arranged on the top of one end of the pull-out plate away from the panel;

[0021] A plurality of groups of second bearings are arranged at intervals on the top of the first mounting seat, and the sides of the positive copper bar and the negative copper bar away from the corresponding electrodes are respectively in contact with the side walls of the corresponding second bearings;

[0022] A plurality of groups of support blocks are respectively arranged between two adjacent groups of the second bearings and connect and fix the plurality of groups of the second bearings. The side walls of the support blocks are provided with support portions, which extend between the positive copper bars and / or the negative copper bars.

[0023] Optionally, the pull-out seat further includes:

[0024] A first limiting column, arranged at the top of one end of another group of the guide rails away from the battery, the first limiting column is in an inverted L shape, and the horizontal section of the first limiting column extends to the top of the pull-out plate;

[0025] A second limiting column is arranged on the top of one end of the pull-out plate away from the panel, and the second limiting column is used to cooperate with the horizontal section of the first limiting column for limiting;

[0026] A spring plate, arranged on the top of another group of the guide rails and located on a side of the first limiting column close to the panel;

[0027] The spring is arranged on a side of the spring plate away from the first limiting column.

[0028] On the other hand, the present invention also provides an electric forklift, comprising:

[0029] A forklift body, the forklift body comprising a frame and a cover shell arranged on the frame, and the cover shell is provided with a pull-out hole;

[0030] A battery, arranged inside the housing and connected to a power system of the forklift body for power supply;

[0031] The pull-out charging seat as described above is arranged inside the cover shell and connected to the battery, and one end of the pull-out charging seat extends to the inside of the pull-out hole.

[0032] Through the above technical scheme, the electric forklift and its pull-out charging seat provided by the present invention pull the pull-out seat so that at least one group of charging seats thereon extend above the two groups of guide rails. At the same time, the positive copper bar and the negative copper bar are driven to slide with the corresponding electrodes respectively until the conductive areas of the positive copper bar and the negative copper bar are in contact and conductive with the corresponding electrodes. At this time, the battery can be charged by plugging in the charging gun; conversely, the connection between the charging seat and the battery can be disconnected by pushing the charging seat to reset. The method of setting a pull-out charging seat in the width direction of the forklift frame does not require the structural parts of the vehicle body to be modified, and the modification is convenient; on the other hand, the charging seat has a compact structure and is easy to operate, which avoids bending of the cable and further improves the safety and reliability of charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1is a schematic structural diagram of a pull-out charging dock for an electric forklift according to an embodiment of the present invention;

[0034] Figure 2 is based on Figure 1 A magnified schematic diagram of the middle A area;

[0035] Figure 3 Schematic diagram of the connection between electrodes and copper bars in a pull-out charging compartment of an electric forklift according to one embodiment of the present invention;

[0036] Figure 4 is a schematic diagram of a conductive area in a pull-out charging compartment of an electric forklift according to an embodiment of the present invention;

[0037] Figure 5 It is a structural schematic diagram of a support plate and a second bearing in a pull-out charging seat compartment of an electric forklift according to an embodiment of the present invention;

[0038] Figure 6 is a schematic structural diagram of an electric forklift according to an embodiment of the present invention;

[0039] Figure 7 is a schematic diagram of the connection between a pull-out charging seat and a battery in an electric forklift according to an embodiment of the present invention;

[0040] Figure 8 is a schematic diagram of charging a pull-out charging dock in an electric forklift according to an embodiment of the present invention;

[0041] Fig. 9 is a schematic diagram of a pull-out charging seat and a battery during charging in an electric forklift according to an embodiment of the present invention;

[0042] Fig.10 A schematic structural diagram of an electric telescopic rod and a limit switch in a pull-out charging compartment of an electric forklift according to an embodiment of the present invention.

[0043] Description of Reference Numerals

[0044] 1. Guide rail 2. Pull-out plate

[0045] 3. First mounting plate 4. Charging base

[0046] 5. Panel 6. Panel lock

[0047] 7. Protective cover 8. Cable

[0048] 9. First bearing 10. Second mounting plate

[0049] 11. Line card 12. Spring

[0050] 13. Spring plate 14. Second limiting column

[0051] 15. First limiting column 16. Electrode

[0052] 17. Second mounting seat 18. Insulation board

[0053] 19. Negative copper busbar 20. Positive copper busbar

[0054] 21. Grounding copper busbar 22. Conductive area

[0055] 23. Second bearing 24. Support block

[0056] 25. Supporting portion 26. First mounting seat

[0057] 27. Frame 28. Side panels

[0058] 29. Battery 30. Charging gun

[0059] 31. Button 32. Electric telescopic rod

[0060] 33. Limit switch DETAILED DESCRIPTION

[0061] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0062] Figure 1 is a schematic structural diagram of a pull-out charging dock for an electric forklift according to an embodiment of the present invention. Figure 3 Schematic diagram of the connection between the electrode and the copper busbar in the pull-out charging compartment of an electric forklift according to one embodiment of the present invention. Figure 1 and Figure 3 In the embodiment, the pull-out charging seat compartment may include two sets of rails 1, at least two sets of electrodes 16, a pull-out seat and at least one set of charging seat 4. Specifically, the charging seat 4 includes a positive copper busbar 20 and a negative copper busbar 19.

[0063] Two sets of guide rails 1 are arranged in parallel on the forklift frame 27 and extend along the width direction of the forklift frame 27. At least two sets of electrodes 16 are arranged at the top of one end of one set of guide rails 1 away from the battery 29, and are distributed in an upper and lower insulating interval. At least two sets of electrodes 16 are connected to the input end of the battery 29 through the cable 8. The pull-out seat is slidably connected to the two sets of guide rails 1. The output end of the charging seat 4 is provided with a positive copper bar 20 and a negative copper bar 19. The positive copper bar 20 and the negative copper bar 19 are distributed in parallel up and down and are slidably connected to the corresponding electrode 16. The positive copper bar 20 and the negative copper bar 19 are arranged at one end away from the charging seat 4. The conductive area 22 is used to contact and conduct with the corresponding electrode 16 when the pull-out seat slides out along the two sets of guide rails 1. The positive and negative electrodes of the charging seat 4 are respectively connected to the other ends of the positive copper bar 20 and the negative copper bar 19.

[0064] When the battery 29 in the electric forklift needs to be charged, pull the pull-out seat to drive at least one group of charging seats 4 to move outward along the two groups of guide rails 1. In the process of moving at least one group of charging seats 4, the positive copper bar 20 and the negative copper bar 19 thereon are synchronously driven to move, and the positive copper bar 20 and the negative copper bar 19 slide along the corresponding electrode 16 until the conductive area 22 is in contact with the corresponding electrode 16 and is connected. At this time, the charging seat 4 is connected to the input end of the battery 29 through the positive copper bar 20 and the negative copper bar 19, and the external charging gun 30 is plugged into the charging seat 4 to charge the battery 29. Specifically, only when the charging gun 30 is inserted into the charging seat 4, the battery BMS receives the charging signal through the communication harness, and the inside of the battery 29 is connected to the cable 8, that is, the battery 29 is connected to the electrode 16 and the charging seat 4. When charging is not needed, push the pull-out seat and at least one set of charging seats 4 to reset, the positive copper bus 20 and the negative copper bus 19 slide along the corresponding electrodes 16, the conductive area 22 is offset from the electrode 16 and disconnected, and at least one set of charging seats 4 is reset to the top of the two sets of guide rails 1 and stored.

[0065] There are great differences between traditional internal combustion platforms and electric platforms. A charging seat needs to be installed on the body of a forklift truck that is converted from oil to electricity. However, since there are many structural parts on the forklift body / frame that are closely related to the strength of the body, a series of calculations and verifications are required when optimizing the original structure of the forklift, which makes it difficult and complicated to convert the forklift from oil to electricity. In this embodiment of the present invention, a guide rail 1 and a pull-out seat that slides with the guide rail 1 are provided in the width direction of the forklift frame 27, and the positive copper bar 20 and the negative copper bar 19 are respectively slidably matched with the corresponding electrode 16, so that the charging seat 4 and the battery 29 can be pulled out and connected. On the one hand, the problem of compact longitudinal space of the internal combustion vehicle body structure is solved, and the charging seat 4 can be effectively and conveniently arranged without changing the structural parts; on the other hand, the pull-out structure of the charging seat 4 is simple to operate and compact in structure, and the connection between the charging seat 4 and the battery 29 can be selected according to the use requirements, which is safer. At the same time, the present invention does not need to modify the structural parts that affect the vehicle body, so there is no need to perform fatigue strength tests on the frame 27, etc. again, which reduces the test verification cost, thereby reducing the cost of vehicle modification. In addition, when the traditional electric forklift is fast charged, the connecting cable 8 between the charging seat 4 and the battery 29 needs to carry a DC current value of about 200A, and the cable 8 is rough and hard, and it is difficult to move at will. In the present invention, the positive copper bus 20, the negative copper bus 19 are in contact and conductive with the electrode 16, and the electrode 16 is connected to the battery 29 through the cable 8, which avoids the influence of at least one group of charging seats 4 on the cable 8 when charging, removing or storing, thereby effectively ensuring the reliability and safety of the cable 8. Furthermore, the charging communication harness is relatively soft and can be bent at will, and is not considered for connection here.

[0066] In this embodiment of the invention, Figure 3 as well as Figure 5 As shown, the electrode 16 may include a second mounting seat 17. Specifically, the second mounting seat 17 is arranged at the top of one end of one group of rails 1 away from the battery 29, and at least two groups of electrodes 16 are arranged on the second mounting seat 17. The second mounting seat 17 can effectively improve the stability of the installation of the electrode 16, thereby facilitating the reliability of the sliding connection between the positive copper busbar 20, the negative copper busbar 19 and the corresponding electrode 16.

[0067] In this embodiment of the invention, Figure 4 As shown, the positive copper bar 20 and the negative copper bar 19 include a wear-resistant insulating layer. Specifically, the outer surface of the end of the positive copper bar 20 and the negative copper bar 19 close to the charging seat 4 and the middle section is plated with a wear-resistant insulating layer to form a conductive area 22 at the end of the positive copper bar 20 and the negative copper bar 19 away from the charging seat 4.

[0068] In this embodiment of the invention, Figure 1 and Figure 3As shown, the shape of the guide rail 1 may include an inverted L shape, and the two groups of guide rails 1 are symmetrically arranged. The inverted L-shaped guide rail 1 may include a horizontal section and a vertical section, and the vertical section of the guide rail 1 may include multiple groups of first bearings 9. Specifically, multiple groups of first bearings 9 are rotatably arranged on the vertical section of the guide rail 1, and the multiple groups of first bearings 9 are arranged in a horizontal array.

[0069] In this embodiment of the invention, Figure 1 and Figure 3 As shown, the drawer seat may include a drawer plate 2, a first mounting plate 3 and a panel 5. Specifically, the panel 5 may include a panel lock 6.

[0070] The drawer plate 2 is slidably disposed between the plurality of first bearings 9 and the horizontal section of the guide rail 1, the first mounting plate 3 is disposed on the top of the drawer plate 2, and the charging seat 4 is disposed and fixedly penetrates the first mounting plate 3. The panel 5 is disposed at one end of the drawer plate 2 away from the battery 29, and a panel lock 6 is disposed on the panel 5.

[0071] The plurality of first bearings 9 cooperate with the horizontal section of the guide rail 1 to form a slideway, and the drawer plate 2 is located in the slideway to slide with the guide rail 1. The panel lock 6 may include a mechanical panel lock, an electronic panel lock, etc. known to those skilled in the art, and the panel lock 6 is used to cooperate with the side plate 28 in the cover on the forklift frame 27 for locking.

[0072] In this embodiment of the invention, Figure 3 and Figure 4 As shown, the at least one group of charging seats 4 may further include a grounding copper bus 21 , one end of which is connected to the ground wire of the charging seat 4 , and the other end of which is fixedly connected to the pull-out plate 2 .

[0073] In this embodiment of the present invention, the existing forklift battery charger supplies 80V DC power to the battery pack, and the maximum current value is 200A. Therefore, electric forklifts that are usually equipped with batteries with a capacity of 500Ah or more need to consider equipping with dual chargers to shorten the charging time to within 2.5h, thereby improving the endurance in disguise. Therefore, further considering the charging capacity and endurance of the forklift, the number of charging seats 4 can include two groups, and the number of electrodes 16 can include four groups. Specifically, Figure 1 , Figure 3 as well as Figure 4 Specifically, Figure 1 , Figure 3 as well as Figure 4 In the embodiment, two groups of charging seats 4 are arranged in parallel along the horizontal direction of the first mounting plate 3, and four groups of electrodes 16 are arranged in an insulating interval from top to bottom. The double-gun (two groups of charging seats 4) design can effectively improve the charging efficiency and the endurance of the vehicle.

[0074] In this embodiment of the invention, Figure 3 and Figure 5 As shown, adjacent electrodes 16 and the lowermost electrode 16 and the second mounting seat 17 are connected and defined by an insulating plate 18 , and the top of the uppermost electrode 16 is provided with an insulating plate 18 and mounting bolts.

[0075] In this embodiment of the invention, Figure 3 and Figure 4 As shown, the connection relationship between the two groups of charging seats 4 and the four groups of electrodes 16 may include: the negative copper bar 19 and the positive copper bar 20 of one group of charging seats 4 are slidably connected to the two middle groups of electrodes 16, and the negative copper bar 19 and the positive copper bar 20 of the other group of charging seats 4 are slidably connected to the other two groups of electrodes 16, that is, the other group of charging seats 4 is slidably connected to the top and bottom electrodes 16. Specifically, the positive copper bar 20 of the charging seat 4 close to the panel 5 is slidably connected to the bottom electrode 16, and the negative copper bar 19 is slidably connected to the top electrode 16; the positive copper bar 20 of the charging seat 4 far from the panel 5 is slidably connected to the middle lower electrode 16, and the negative copper bar 19 is slidably connected to the middle upper electrode 16.

[0076] In this embodiment of the invention, Figure 4 and Figure 5 As shown, the spacing between the two groups of positive copper bars 20 is equal to the spacing between the two groups of negative copper bars 19, and both are smaller than the spacing between the positive copper bars 20 and the negative copper bars 19. Specifically, the spacing between the positive copper bars 20 and the negative copper bars 19 may include the spacing between the positive copper bars 20 and the negative copper bars 19 corresponding to the charging seat 4 away from the panel 5. By adopting this spacing setting mode, combined with the wear-resistant insulating layer on the surface of the positive copper bars 20 and the negative copper bars 19, short circuits and / or arcs can be effectively avoided.

[0077] In this embodiment of the invention, Figure 5 As shown, the drawer seat may further include a first mounting seat 26, a plurality of sets of second bearings 23 and a plurality of sets of support blocks 24. Specifically, the support block 24 may include a support portion 25.

[0078] The first mounting seat 26 is arranged at the top of one end of the pull-out plate 2 away from the panel 5, and multiple groups of second bearings 23 are arranged at intervals on the top of the first mounting seat 26. The positive copper bar 20 and the negative copper bar 19 are respectively fitted with the side walls of the corresponding second bearings 23 on the side away from the corresponding electrode 16. Multiple groups of support blocks 24 are respectively arranged between two adjacent groups of second bearings 23 and connected to fix the multiple groups of second bearings 23. The side walls of the support blocks 24 are provided with support portions 25, and the support portions 25 extend between the positive copper bar 20 and / or the negative copper bar 19. The top of the second bearing 23 at the top is provided with a support block 24 and a mounting bolt.

[0079] When the two groups of positive copper bars 20 and the two groups of negative copper bars 19 move with the charging station 4, the positive copper bars 20 and the negative copper bars 19 roll along the corresponding second bearing 23 surface, that is, the second bearing 23 can limit the positive copper bars 20 or the negative copper bars 19 and drive them to stably contact with the surface of the electrode 16, further improving the reliability of the connection between the charging station 4 and the battery 29. Multiple groups of support parts 25 extend between the corresponding adjacent copper bars, that is, between the positive copper bars 20 and the positive copper bars 20, between the positive copper bars 20 and the negative copper bars 19, and between the negative copper bars 19 and the negative copper bars 19. The support parts 25 can effectively support and limit the two groups of positive copper bars 20 and the negative copper bars 19, so that the contact surface between the positive copper bars 20 and the negative copper bars 19 and the corresponding electrodes 16 is maximized, avoiding the copper bars from tilting due to long-term use, and then causing poor contact with the corresponding electrodes 16, further improving the reliability of the connection between the charging station 4 and the battery 29. In addition, the multiple groups of support blocks 24 can also form an insulation effect between the multiple groups of second bearings 23 .

[0080] In this embodiment of the present invention, the second bearings 23 are respectively in contact with the middle height of the corresponding copper bars, that is, the second bearings 23 can push the corresponding copper bars to be in close contact with the corresponding electrodes 16, avoiding the problem of false contact and heat generation.

[0081] In this embodiment of the present invention, the second bearing 23 may include a ceramic insulating bearing, and the material of the support block 24 may include high temperature resistant insulating materials such as mica or ceramic.

[0082] In this embodiment of the invention, Figure 2 As shown, the drawer seat may further include a first limiting column 15 , a second limiting column 14 , a spring plate 13 and a spring 12 .

[0083] The first limiting column 15 is arranged at the top of the other set of guide rails 1 away from the battery 29, and the first limiting column 15 is in an inverted L shape, and the horizontal section of the first limiting column 15 extends above the pull-out plate 2. The second limiting column 14 is arranged at the top of the end of the pull-out plate 2 away from the panel 5, and the second limiting column 14 is used to cooperate with the horizontal section of the first limiting column 15 for limiting. The spring plate 13 is arranged at the top of the other set of guide rails 1, and is located on the side of the first limiting column 15 close to the panel 5, and the spring 12 is arranged on the side of the spring plate 13 away from the first limiting column 15.

[0084] When the battery 29 in the electric forklift needs to be charged, the pull-out plate 2 is pulled to drive the charging seat 4 to move outward along the two sets of guide rails 1 until the positive copper bar 20 and the negative copper bar 19 are in contact with the corresponding electrode 16. During the sliding process of the charging seat 4, the second limit column 14 gradually contacts and is limited by the horizontal section of the first limit column 15. At this time, the positive copper bar 20 and the negative copper bar 19 can be stably connected and connected with the corresponding electrode 16. The first limit column 15 and the second limit column 14 are used to effectively prevent the pull-out plate 2 from sliding out of the guide rail 1 during the sliding process, thereby preventing the positive copper bar 20 and the negative copper bar 19 from missing the position of being connected to the corresponding electrode 16, and improving the stability and reliability of the positive copper bar 20 and the negative copper bar 19 being connected to the corresponding electrode 16. When the battery 29 in the electric forklift does not need to be charged, it is necessary to push the pull-out plate 2 to slide in the opposite direction for storage. When the pull-out plate 2 is gradually stored in place, the panel 5 contacts the spring 12 first, and the spring 12 cushions the movement of the panel 5 to prevent the panel 5 or the pull-out plate 2 from directly and quickly colliding with the frame 27 or the cover, thereby effectively protecting the panel 5 and the pull-out plate 2 and improving the service life of the panel 5 or the pull-out plate 2 and the reliability of the charging dock.

[0085] In this embodiment of the invention, Figure 1 As shown, considering the safety and reliability of the use of the charging stand 4, the pull-out stand may further include a protective cover 7. Specifically, the protective cover 7 may include a plurality of wire holes.

[0086] The protective cover 7 is arranged on the top of the first mounting plate 3 and cooperates with the first mounting plate 3 and the drawer plate 2 to form a semi-enclosed protective area. The cable 8 connecting the electrode 16 and the battery 29 is movably passed through the multiple wire holes on the protective cover 7 to achieve a stable connection.

[0087] The protective cover 7 can provide protection when the charging seat 4 is charging, waiting to be charged, and being pulled out, so as to ensure that the charging seat 4 is stably connected or disconnected with the battery 29, further improving the reliability of the charging seat compartment.

[0088] In this embodiment of the invention, Fig.10 As shown, the pull-out seat may further include an electric telescopic rod 32, a limit switch 33 and a button 31. Specifically, the limit switch 33 may include multiple groups.

[0089] The electric telescopic rod 32 is arranged between the two sets of guide rails 1 and below the pull-out plate 2, and the output end of the electric telescopic rod 32 is connected to the bottom of the pull-out plate 2. A set of extension limit switches 33 is arranged at one end of one guide rail 1 close to the panel 5, and a set of retraction limit switches 33 is arranged at one end of the other guide rail 1 away from the panel 5. A button 31 is arranged on the side of the panel 5 away from the pull-out plate 2 for controlling the start and stop of the electric telescopic rod 32.

[0090] When the charging seat 4 needs to be driven to slide along the guide rail 1, the electric telescopic rod 32 is started, and the two sets of limit switches 33 respectively identify and limit the extension / retraction position of the charging seat 4, thereby realizing automatic extension / retraction of the charging seat 4, and the control is simple and convenient.

[0091] In this embodiment of the invention, Figure 1 as well as Fig.10 As shown, the pull-out charging seat can also include a second mounting plate 10 and a wire clip 11. Specifically, the second mounting plate 10 is arranged between the two sets of guide rails 1, and the wire clip 11 is arranged on the second mounting plate 10. The wire clip 11 is used to limit the cable 8 connecting the fixed electrode 16 and the battery 29 to avoid interference between the cable 8 and the sliding of the charging seat 4, thereby ensuring the reliability of the extension and retraction of the charging seat 4. At the same time, it also avoids the bending of the cable 8 and protects the cable 8.

[0092] On the other hand, the present invention also provides an electric forklift, such as Figure 1 , Figure 3 , Figure 6 , Figure 7 , Figure 8 as well as Fig. 9 Specifically, Figure 1 , Figure 3 , Figures 6 to 9 In the embodiment, the electric forklift may include a forklift body, a battery 29 and a pull-out charging seat. The pull-out charging seat may include two sets of guide rails 1, at least two sets of electrodes 16, a pull-out seat and at least one set of charging seat 4. Specifically, the charging seat 4 includes a positive copper bus 20 and a negative copper bus 19.

[0093] The forklift body includes a frame 27 and a cover shell arranged on the frame 27, and a pull-out hole is opened on the cover shell. The battery 29 is arranged inside the cover shell and is connected to the power system of the forklift body for power supply. The pull-out charging seat is arranged inside the cover shell and is connected to the battery 29, and one end of the pull-out charging seat extends to the inside of the pull-out hole. Two sets of guide rails 1 are arranged in parallel on the forklift frame 27 and extend along the width direction of the forklift frame 27. At least two sets of electrodes 16 are arranged at the top of one end of one set of guide rails 1 away from the battery 29, and are distributed with upper and lower insulating intervals. At least two sets of electrodes 16 are connected to the input end of the battery 29 through a cable 8. The pull-out seat is slidably connected to the two sets of guide rails 1, and the output end of the charging seat 4 is provided with a positive copper bar 20 and a negative copper bar 19, which are arranged in parallel up and down and are slidably connected to the corresponding electrode 16, and a conductive area 22 is provided at one end of the positive copper bar 20 and the negative copper bar 19 away from the charging seat 4, and the conductive area 22 is used to contact and conduct with the corresponding electrode 16 when the pull-out seat slides out along the two sets of guide rails 1. The positive and negative electrodes of the charging seat 4 are connected to the other ends of the positive copper bar 20 and the negative copper bar 19 respectively.

[0094] When the battery 29 in the electric forklift needs to be charged, pull the pull-out seat to drive at least one group of charging seats 4 to move outward along the two groups of guide rails 1. In the process of moving at least one group of charging seats 4, the positive copper bar 20 and the negative copper bar 19 thereon are synchronously driven to move, and the positive copper bar 20 and the negative copper bar 19 slide along the corresponding electrode 16 until the conductive area 22 is in contact with the corresponding electrode 16 and is connected. At this time, the charging seat 4 is connected to the input end of the battery 29 through the positive copper bar 20 and the negative copper bar 19, and the external charging gun 30 is plugged into the charging seat 4 to charge the battery 29. Specifically, only when the charging gun 30 is inserted into the charging seat 4, the battery BMS receives the charging signal through the communication harness, and the inside of the battery 29 is connected to the cable 8, that is, the battery 29 is connected to the electrode 16 and the charging seat 4. When charging is not needed, push the pull-out seat and at least one set of charging seats 4 to reset, the positive copper bus 20 and the negative copper bus 19 slide along the corresponding electrodes 16, the conductive area 22 is offset from the electrode 16 and disconnected, and at least one set of charging seats 4 is reset to the top of the two sets of guide rails 1 and stored.

[0095] In this embodiment of the invention, Figure 8 and Fig. 9 As shown, the cover shell may include a side plate 28 , a pull-out hole is provided on the side plate 28 , and the panel 5 is locked with the side plate 28 .

[0096] The panel 5 is arranged inside the drawer hole, and can cooperate to form a hidden structure, which will not interfere with the driver and other personnel, and is safer. At the same time, the gap between the panel 5 and the side plate 28 is smaller than the hinged charging hole door structure, which can effectively improve the overall aesthetics of the electric forklift.

[0097] Through the above technical scheme, the electric forklift and its pull-out charging seat provided by the present invention pull the pull-out seat so that at least one group of charging seats 4 thereon extend above the two groups of guide rails 1. At the same time, the positive copper bar 20 and the negative copper bar 19 are driven to slide with the corresponding electrodes 16 respectively, until the conductive areas 22 of the positive copper bar 20 and the negative copper bar 19 are in contact and conductive with the corresponding electrodes 16. At this time, the battery 29 can be charged by plugging in the charging gun 30; conversely, the connection between the charging seat 4 and the battery 29 can be disconnected by pushing the charging seat 4 to reset. The method of setting a pull-out charging seat in the width direction of the forklift frame 27 does not require the structural parts of the vehicle body to be modified, and the modification is convenient; on the other hand, the charging seat has a compact structure and is easy to operate, which avoids bending of the cable and further improves the safety and reliability of charging.

[0098] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0099] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A pull-out charging compartment for an electric forklift, characterized in that: include: Two sets of guide rails are arranged in parallel on the forklift frame and extend along the width direction of the forklift frame; At least two groups of electrodes are arranged on the top of one end of one group of the guide rails away from the battery and are distributed in an upper and lower insulating manner. The at least two groups of electrodes are connected to the input end of the battery through a cable; A drawer seat, slidably connected to the two sets of guide rails; At least one set of charging seats, the output end of the charging seat is provided with a positive copper bar and a negative copper bar, the positive copper bar and the negative copper bar are distributed in parallel up and down and are slidably connected with the corresponding electrodes, and the positive copper bar and the negative copper bar are provided with a conductive area at one end away from the charging seat, and the conductive area is used to contact and conduct with the corresponding electrodes when the pull-out seat slides out along the two sets of guide rails.

2. The pull-out charging dock according to claim 1, characterized in that: The outer surfaces of the ends of the positive copper bar and the negative copper bar close to the charging seat and the middle section are plated with a wear-resistant insulating layer to form a conductive area at the ends of the positive copper bar and the negative copper bar away from the charging seat.

3. The pull-out charging dock according to claim 1, characterized in that: The guide rail is in an inverted L shape, and a plurality of first bearings are rotatably arranged on the vertical section of the guide rail, and the plurality of first bearings are arranged in a horizontal array.

4. The pull-out charging dock according to claim 3, characterized in that: The pull-out seat comprises: A pull-out plate, slidably disposed between the plurality of groups of the first bearings and the horizontal section of the guide rail; A first mounting plate is arranged on the top of the pull-out plate, and the charging seat is arranged and fixedly penetrates the first mounting plate; A panel is arranged at one end of the drawer plate away from the battery, and a panel lock is arranged on the panel.

5. The pull-out charging dock according to claim 1, characterized in that: The number of the electrodes includes four groups, and the number of the charging bases includes two groups.

6. The pull-out charging dock according to claim 5, characterized in that: The negative copper bar and the positive copper bar of one group of the charging seat are slidably connected to the corresponding two groups of electrodes in the middle, and the negative copper bar and the positive copper bar of another group of the charging seat are slidably connected to the corresponding two groups of electrodes.

7. The pull-out charging dock according to claim 5, characterized in that: The spacing between the two groups of positive copper bars and the spacing between the two groups of negative copper bars are both smaller than the spacing between the positive copper bar and the negative copper bar.

8. The pull-out charging dock according to claim 4, characterized in that: The pull-out seat also includes: A first mounting seat is arranged on the top of one end of the pull-out plate away from the panel; A plurality of groups of second bearings are arranged at intervals on the top of the first mounting seat, and the sides of the positive copper bar and the negative copper bar away from the corresponding electrodes are respectively in contact with the side walls of the corresponding second bearings; A plurality of groups of support blocks are respectively arranged between two adjacent groups of the second bearings and connect and fix the plurality of groups of the second bearings. The side walls of the support blocks are provided with support portions, which extend between the positive copper bars and / or the negative copper bars.

9. The pull-out charging dock according to claim 4, characterized in that: The pull-out seat also includes: A first limiting column, arranged at the top of one end of another group of the guide rails away from the battery, the first limiting column is in an inverted L shape, and the horizontal section of the first limiting column extends to the top of the pull-out plate; A second limiting column is arranged on the top of one end of the pull-out plate away from the panel, and the second limiting column is used to cooperate with the horizontal section of the first limiting column for limiting; A spring plate, arranged on the top of another group of the guide rails and located on a side of the first limiting column close to the panel; The spring is arranged on a side of the spring plate away from the first limiting column.

10. An electric forklift, characterized in that: include: A forklift body, the forklift body comprising a frame and a cover shell arranged on the frame, and the cover shell is provided with a pull-out hole; A battery, arranged inside the housing and connected to a power system of the forklift body for power supply; The pull-out charging seat as described in any one of claims 1 to 9 is arranged inside the cover shell and connected to the battery, and one end of the pull-out charging seat extends to the inside of the pull-out hole.

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