An electric forklift

Abstract

The present invention relates to the technical field of forklifts, specifically an electric forklift, comprising a load-bearing mechanism, a rail-type counterweight mechanism, and a protective mechanism, wherein the load-bearing mechanism comprises a horizontally placed chassis, a motor installed in a reserved cavity in the middle of the chassis, and a limit beam and a threaded rod movably installed inside the chassis. The chassis is cast from cast iron, and a cavity for placing power and control components such as an oil pump motor is reserved on the chassis during mold casting, and the storage assembly is suspended as a whole directly above the chassis. At the same time, slide grooves of the same specifications are respectively opened on both sides of the interior of the chassis, and limit beams and threaded rods that can limit and guide the support assembly as a whole and transmit the weight in a lateral progressive manner are movably installed inside the two slide grooves. When the threaded rod is rotated, the rotation of the threaded rod can drive the support assembly and the storage assembly as a whole to move laterally along the top of the chassis, thereby enabling the device to avoid the problem of repeated loading of counterweights on the transmission forklift.

Description

Technical Field

[0001] The present invention relates to the technical field of forklifts, in particular to an electric forklift. Background Art

[0002] Forklifts are industrial handling vehicles, which refer to various wheeled handling vehicles used for loading and unloading, stacking and short-distance transportation of palletized goods. They are often used for transporting large objects in warehouses and are usually powered by fuel engines or batteries.

[0003] For existing electric forklifts, the battery, which serves as part of the counterweight, is located on the chassis slightly behind the front and rear wheels. The chassis is welded from steel plates and rails, and the power and control components such as the oil pump and motor in the chassis are located under the battery. In addition to adding counterweight to the vehicle itself when in use, if the power and control components such as the oil pump and motor fail and need to be repaired, a crane must be used to lift the battery for repair, which is extremely time-consuming.

[0004] How to solve the problem that the existing electric forklift can automatically adjust the distribution of its internal counterweight according to the transferred goods during use, while improving the convenience of maintenance of power and control components such as the oil pump motor, is the technical difficulty that the present invention needs to solve. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] To this end, the technical solution adopted in the present invention is:

[0007] An electric forklift includes a load-bearing mechanism, a rail-type counterweight mechanism and a protective mechanism, wherein the load-bearing mechanism includes a horizontal chassis, a motor installed in a reserved cavity in the middle of the chassis, a limit beam and a threaded rod movably installed inside the chassis, the rail-type counterweight mechanism includes a support assembly movably installed in a slide groove inside the chassis, a storage assembly installed on the support assembly and a force arm assembly installed on the support assembly, the support assembly includes a force arm bracket located directly above the chassis, a slide mounted at the bottom of the force arm bracket, two bottom-placed sliders mounted at the bottom of the slide, a positioning cross plate movably installed inside the force arm bracket and two nuts threadedly connected inside the positioning cross plate, the The storage assembly includes an outer box that is movably installed on the inner sides of two adjacent lever arm brackets and distributed in the air, an extended wire installed on the outer box, a plurality of batteries installed in an array in the slots on the top of the outer box, a panel drawer movably installed inside the outer box, and a counterweight plate stacked on the panel drawer. The lever arm assembly includes a cross bar installed on the outside of the lever arm bracket and distributed laterally, and a latch installed inside the cross bar. The protective mechanism includes an outer shell installed on the top of the chassis, safety outer plates installed in rectangular slots on both sides of the outer shell, a plurality of positioning fixtures installed on the outside of the outer shell, a counterweight plug movably placed in the positioning fixture, a base installed inside the outer shell, and a telescopic device installed on the inside of the base.

[0008] In a preferred example, the present invention can be further configured as follows: the chassis is made of cast iron, and slide grooves of the same specifications are opened on both sides of the interior of the chassis.

[0009] By adopting the above technical solution, the chassis is cast using a mold, and a cavity is reserved inside it for placing power and control components such as the oil pump motor. At the same time, two sliding grooves are opened inside it to guide the lateral movement of the restraining support assembly. After the control support assembly moves laterally, the operator can quickly replace the battery and quickly repair power and control components such as the oil pump motor.

[0010] In a preferred example, the present invention can be further configured as follows: a cross-shaped end is provided at the outer end of the threaded rod, and threaded notches with dense distribution are provided on the outside of the threaded rod.

[0011] By adopting the above technical solution, a cross-shaped end is provided at the outer end of the threaded rod and is passed through to the outside of the chassis, so that an operator can conveniently control it using an external wrench.

[0012] In a preferred example, the present invention can be further configured as follows: the lever arm bracket is an L-shaped structure as a whole, and an inwardly recessed rectangular hole groove is provided inside the lever arm bracket.

[0013] By adopting the above technical solution, a horizontal plate protruding inward is opened at the bottom of the arm bracket, and rectangular holes are opened inside it to constrain the partitions on both sides of the outer box, so that the outer box can be installed quickly and the storage assembly as a whole can be kept in a suspended state.

[0014] In a preferred example, the present invention can be further configured as follows: the bottom slider is T-shaped as a whole, and a screw hole is provided in the middle of the bottom slider to engage with the external threaded groove of the threaded rod.

[0015] By adopting the above technical solution, the bottom slider itself is engaged with the external thread groove of the threaded rod. When the threaded rod is controlled to rotate clockwise, the bottom slider can move stably horizontally along the outside of the threaded rod.

[0016] In a preferred example, the present invention can be further configured as follows: the positioning horizontal plate is made of stainless steel, and two horizontal holes are opened inside the positioning horizontal plate and are symmetrically adapted to the threaded holes on the outside of the outer box.

[0017] By adopting the above technical solution, the positioning cross plate is movably installed in the rectangular hole groove inside the arm bracket using nuts, and the inner end of the positioning cross plate is combined with the limiting constraints of the partitions on both sides of the outer box, and the inner ends of the two nuts are engaged with the threaded holes on both sides of the outer box, so that the stability of the storage component after overall installation can be achieved.

[0018] In a preferred example, the present invention can be further configured as follows: a rectangular cavity is provided inside the outer box, and a slideway adapted to fit the bottom slider of the panel drawer is provided at the bottom of the rectangular cavity.

[0019] By adopting the above technical solution, when the device needs to be pre-weighted, the panel drawer can be pulled outward, and then a plurality of weight balancing plates can be stacked and placed inside the panel drawer.

[0020] In a preferred example, the present invention can be further configured as follows: the telescopic rod is composed of a telescopic main rod, a telescopic sub-rod, a spring, and a gasket installed at the inner end of the telescopic sub-rod.

[0021] By adopting the above technical solution, the gasket installed at the inner end of the telescopic sub-rod is used to pressurize the top end surface of the force arm bracket. Once the threaded rod drives the bottom slider to move excessively laterally, the gasket installed at the inner end of the telescopic sub-rod can prevent the force arm bracket from being blocked in the rectangular slot inside the shell.

[0022] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows:

[0023] 1. The present invention is made of cast iron by casting a chassis. During the mold casting, a cavity for placing power and control components such as an oil pump motor is reserved on the chassis, and the storage assembly is suspended as a whole above the chassis. At the same time, slide grooves of the same specifications are opened on both sides of the interior of the chassis, and a limiting beam rod and a threaded rod are movably installed inside the two slide grooves to limit and guide the support assembly as a whole and to perform lateral progressive transmission. When the threaded rod is rotated, the rotation of the threaded rod can drive the support assembly and the storage assembly as a whole to move laterally along the top of the chassis, so that the device can avoid the problem of repeated loading of counterweights by the transmission forklift.

[0024] 2. The present invention installs an extension wire on the outside of the outer box, and uses the length of the extension wire itself to connect with the motor, and cooperates with two slide grooves inside the chassis to respectively provide lateral constraints and transmission guidance for the two groups of support components. Once the battery is damaged due to a fault, the operator can quickly adjust the overall outward expansion of the storage component, thereby enabling the operator to replace the faulty battery in time, avoiding the problem of cumbersome traditional disassembly.

[0025] 3. The present invention provides slots adapted for the support assembly and the storage assembly on the outer side of the shell, installs a vertically distributed base on the inner side of the slot of the shell, and installs a telescopic device on the inner side of the base that can elastically boost the top end face of the lever arm bracket laterally. When the support assembly is laterally extended to its maximum state, the inner end of the telescopic device applies reverse pressure to the top end face of the lever arm bracket, thereby avoiding the problem of the bottom slider being locked due to excessive rotation force of the threaded rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of an embodiment of the present invention;

[0027] Figure 2 A bottom view schematically shows an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a dispersion of an embodiment of the present invention;

[0029] Figure 4 An embodiment of the present invention Figure 3 Schematic diagram of local dispersion;

[0030] Figure 5 An embodiment of the present invention Figure 3 A partial top view of

[0031] Figure 6 An embodiment of the present invention Figure 5 Cross-section and dispersion diagram of

[0032] Figure 7 An embodiment of the present invention Figure 6 The local dispersion and its upward view;

[0033] Figure 8 An embodiment of the present invention Figure 7 Schematic diagram of the internal dispersion of

[0034] Figure 9 An embodiment of the present invention Figure 8 A partial upward-looking schematic diagram of .

[0035] Reference numerals:

[0036] 100, load-bearing mechanism; 110, chassis; 120, motor; 130, limit beam; 140, threaded rod;

[0037] 200, rail-type counterweight mechanism; 210, support assembly; 211, lever arm bracket; 212, slide plate; 213, bottom slider; 214, positioning cross plate; 215, nut; 220, storage assembly; 221, outer box; 222, extension wire; 223, battery; 224, plate-type drawer; 225, counterweight plate; 230, lever arm assembly; 231, cross bar; 232, latch;

[0038] 300, protective mechanism; 310, outer shell; 320, safety outer panel; 330, positioning fixture; 340, counterweight plug; 350, base; 360, telescopic. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0040] An electric forklift provided by some embodiments of the present invention will be described below with reference to the accompanying drawings.

[0041] Example 1:

[0042] Combine Figures 1-9 As shown, the present invention provides an electric forklift, which includes a load-bearing mechanism 100 , a rail-type counterweight mechanism 200 and a protection mechanism 300 . The rail-type counterweight mechanism 200 is installed on the load-bearing mechanism 100 , and the protection mechanism 300 is installed on the load-bearing mechanism 100 .

[0043] The load-bearing mechanism 100 includes a chassis 110, a motor 120, a limiting beam 130 and a threaded rod 140. The rail-type counterweight mechanism 200 includes a support assembly 210, a storage assembly 220 and a lever assembly 230. The support assembly 210 also includes a lever bracket 211, a slide 212, a bottom slider 213, a positioning cross plate 214 and a nut 215. The storage assembly 220 also includes an outer box 221, an extension wire 222, a battery 223, a panel drawer 224 and a counterweight plate 225. The lever assembly 230 also includes a cross bar 231 and a latch 232. The protective mechanism 300 includes an outer shell 310, a safety outer plate 320, a positioning fixture 330, a counterweight plug 340, a base 350 and a telescopic 360.

[0044] Specifically, the motor 120 is installed in the cavity reserved in the middle of the chassis 110, the limiting beam 130 and the threaded rod 140 are movably installed in the interior of the chassis 110, the support assembly 210 is movably installed in the slide groove inside the chassis 110, the storage assembly 220 is installed on the support assembly 210, the arm assembly 230 is installed on the support assembly 210, the arm bracket 211 is located directly above the chassis 110, the slide 212 is installed at the bottom of the arm bracket 211, two bottom sliders 213 are installed at the bottom of the slide 212, the positioning cross plate 214 is movably installed in the interior of the arm bracket 211, two nuts 215 are threadedly connected to the interior of the positioning cross plate 214, and the outer box 221 is movably installed on two adjacent arm brackets 2 11, an extension wire 222 is installed on the outer box 221, a plurality of batteries 223 are installed in an array in the slots on the top of the outer box 221, a plate drawer 224 is movably installed inside the outer box 221, counterweight plates 225 are stacked on the plate drawer 224, a cross bar 231 is installed on the outside of the arm bracket 211, a latch 232 is installed on the inside of the cross bar 231, an outer shell 310 is installed on the top of the chassis 110, a safety outer plate 320 is installed in the rectangular notches on both sides of the outer shell 310, a plurality of positioning fixtures 330 are installed on the outside of the outer shell 310, a counterweight block 340 is movably placed in the positioning fixture 330, a base 350 is installed in the outer shell 310, and a telescopic 360 is installed on the inner side of the base 350.

[0045] By installing a vertically distributed base 350 on the inner side of the slot of the shell 310, and installing a telescopic 360 on the inner side of the base 350 that can elastically increase the pressure on the top end face of the arm bracket 211, and by using the length of the extended wire 222 itself to connect with the motor 120, and cooperating with the two slides inside the chassis 110 to respectively restrain the two groups of support components 210 in the horizontal direction and guide the transmission, once the battery 223 is damaged due to a fault, the operator can quickly adjust the overall direction of the storage component 220. The support assembly 210 is expanded outward, and the storage assembly 220 is suspended as a whole above the chassis 110. At the same time, slide grooves of the same specifications are opened on both sides of the inside of the chassis 110, and the limiting beam rod 130 and the threaded rod 140 are movably installed inside the two slide grooves to limit the guidance and horizontal progressive transmission of the support assembly 210 as a whole. When the threaded rod 140 is rotated, the rotation of the threaded rod 140 can drive the support assembly 210 and the storage assembly 220 as a whole to move horizontally along the top of the chassis 110.

[0046] Example 2:

[0047] Combine Figure 6 As shown, based on the first embodiment, the chassis 110 is made of cast iron, and the interior of the chassis 110 is provided with sliding grooves of the same specifications on both sides, the outer end of the threaded rod 140 is provided with a cross-shaped end, and the outside of the threaded rod 140 is provided with densely distributed threaded grooves.

[0048] The chassis 110 is cast using a mold, and a cavity is reserved inside it for placing power and control components such as the oil pump motor. At the same time, two sliding grooves are opened inside it to guide the horizontal movement of the restraining support assembly 210. After the control support assembly 210 moves horizontally, the operator can quickly replace the battery 223 and quickly repair power and control components such as the oil pump motor. The cross-shaped end is passed through the outside of the chassis 110, so that the operator can control it with an external wrench.

[0049] Example 3:

[0050] Combine Figure 6-Figure 9 As shown, on the basis of Example 1, the cross-shaped end arm bracket 211 is an L-shaped structure as a whole, and the interior of the arm bracket 211 is provided with an inwardly recessed rectangular hole groove, the bottom slider 213 is an overall T-shaped, and the middle of the bottom slider 213 is provided with a screw hole that engages with the external threaded groove of the threaded rod 140, the positioning cross plate 214 is made of stainless steel material, and the interior of the positioning cross plate 214 is provided with two horizontal holes that are symmetrical to the external threaded holes of the outer box 221, the interior of the outer box 221 is provided with a rectangular cavity, and the bottom of the rectangular cavity is provided with a slideway that is adapted to the bottom slider of the panel drawer 224.

[0051] By opening an inwardly protruding horizontal plate at the bottom of the arm bracket 211 and opening a rectangular hole groove inside it for constraining the partitions on both sides of the outer box 221, the outer box 221 can be installed quickly, and the storage assembly 220 as a whole can be kept in a suspended state. When the control threaded rod 140 is rotated clockwise, the bottom slider 213 can be stably moved horizontally along the outside of the threaded rod 140, and combined with the limiting constraints of the inner end of the positioning horizontal plate 214 and the partitions on both sides of the outer box 221, and the engagement of the inner ends of the two nuts 215 with the threaded holes on both sides of the outer box 221, the stability of the storage assembly 220 after installation can be ensured. In addition, when the device needs to be pre-balanced, the plate drawer 224 can be pulled outward, and then multiple counterweight plates 225 can be stacked and placed on the inner side of the plate drawer 224.

[0052] Example 4:

[0053] Combine Figure 3 and Figure 4 As shown, based on the first embodiment, the telescopic device 360 is composed of a telescopic main rod, a telescopic sub-rod, a spring and a gasket installed at the inner end of the telescopic sub-rod.

[0054] The gasket installed at the inner end of the telescopic sub-rod is used to pressurize the top end surface of the arm bracket 211. Once the threaded rod 140 drives the bottom slider 213 to move excessively laterally, the gasket installed at the inner end of the telescopic sub-rod can prevent the arm bracket 211 from being blocked in the rectangular slot inside the shell 310.

[0055] The working principle and use process of the present invention are as follows: the operator needs to pre-assemble the plate drawer 224 into the inner cavity of the outer box 221, then pull out the plate drawer 224, and then stack multiple counterweight plates 225 in sequence on the inner partition of the plate drawer 224. When the counterweight plates 225 are fully laid out, the plate drawer 224 is pushed back into the inner cavity of the outer box 221, and then multiple batteries 223 are assembled in the groove at the top of the outer box 221, and the extension wire 22 is used to extend the battery pack. 2. Connect the multiple batteries 223 distributed in the array to the motor 120, then install the pin 232 inside the crossbar 231, then weld the crossbar 231 to the arm bracket 211, then movably install the bottoms of the two sets of bottom sliders 213 and the slide plate 212 in the two chute inside the chassis 110, then install the limiting beam 130 in one side chute inside the chassis 110, and then movably install the threaded rod 140 in the other side chute inside the chassis 110. The limiting beam 130 and the threaded rod 140 are respectively passed through the screw holes inside the two sets of bottom sliders 213, and then the combined telescopic 360 is installed on the inner side of the base 350. At this time, the inner side of the base 350 and the telescopic 360 as a whole are horizontally symmetrical to the end face of the top of the force arm bracket 211. When the external wrench is used to control the cross-shaped end of the threaded rod 140 to rotate clockwise, the rotation of the threaded rod 140 will drive the two bottom sliders 213 outside it to move horizontally. When the forklift moves in the direction of the load, the two support assemblies 210 as a whole can drive the storage assembly 220 and the arm assembly 230 as a whole to move outward along the top surface of the chassis 110 until the end surface of the top of the arm bracket 211 contacts and fits on the gasket at the inner end of the telescopic 360. When the items carried by the forklift exceed the initial counterweight of the vehicle, the operator can use the pin seat in the positioning fixture 330 to assemble the additional counterweight plug 340 on the outside of the pin 232 to realize the free counterweight outside the vehicle.

[0056] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An electric forklift, characterized in that: The invention comprises a load-bearing mechanism (100), a rail-type counterweight mechanism (200), and a protective mechanism (300); the load-bearing mechanism (100) comprises a horizontal chassis (110), a motor (120) installed in a cavity reserved in the middle of the chassis (110), a limiting beam (130) and a threaded rod (140) movably installed inside the chassis (110); The rail-type counterweight mechanism (200) is movably mounted on the load-bearing mechanism (100), and includes a support assembly (210) movably mounted in a chute inside the chassis (110), a storage assembly (220) mounted on the support assembly (210), and a force arm assembly (230) mounted on the support assembly (210); the support assembly (210) includes a force arm bracket (211) located directly above the chassis (110), a slide plate (212) mounted at the bottom of the force arm bracket (211), two bottom-placed sliders (213) mounted at the bottom of the slide plate (212), a positioning transverse plate (214) movably mounted inside the force arm bracket (211), and two nuts (215) threadedly connected inside the positioning transverse plate (214); the storage assembly (220) includes an outer box (221) movably mounted inside two adjacent force arm brackets (211) and suspended in the air, an extension wire (222) mounted on the outer box (221), and a plurality of screws (214) screwed in the inner side of the positioning transverse plate (214). ), a plurality of storage batteries (223) arrayed in slots at the top of the outer box (221), a plate-type drawer (224) movably mounted inside the outer box (221), and a counterweight plate (225) stacked and placed on the plate-type drawer (224); the arm assembly (230) comprises a crossbar (231) mounted outside the arm bracket (211) and distributed laterally, and a latch (232) mounted inside the crossbar (231); the protection mechanism (300) is mounted on the load-bearing mechanism (100), comprising a housing (310) mounted on the top of the chassis (110), safety outer plates (320) mounted in rectangular notches on both sides of the housing (310), a plurality of positioning fixtures (330) mounted outside the housing (310), a counterweight plug (340) movably placed in the positioning fixture (330), a base (350) mounted inside the housing (310), and a telescopic (360) mounted inside the base (350).

2. The electric forklift according to claim 1, characterized in that: The chassis (110) is made of cast iron, and slide grooves of the same specifications are provided on both sides of the interior of the chassis (110).

3. The electric forklift according to claim 1, characterized in that: The outer end of the threaded rod (140) is provided with a cross-shaped end, and the outside of the threaded rod (140) is provided with densely distributed threaded notches.

4. The electric forklift according to claim 1, characterized in that: The arm support (211) is an L-shaped structure as a whole, and an inwardly recessed rectangular hole groove is provided inside the arm support (211).

5. The electric forklift according to claim 1, characterized in that: The bottom sliding block (213) is T-shaped as a whole, and a screw hole is provided in the middle of the bottom sliding block (213) for engaging with the external threaded notch of the threaded rod (140).

6. The electric forklift according to claim 1, characterized in that: The positioning transverse plate (214) is made of stainless steel, and two transverse holes are opened inside the positioning transverse plate (214) and are symmetrically adapted to the external threaded holes of the outer box (221).

7. The electric forklift according to claim 1, characterized in that: A rectangular cavity is provided inside the outer box (221), and a slideway adapted to fit the bottom slider of the plate-type drawer (224) is provided at the bottom of the rectangular cavity.

8. The electric forklift according to claim 1, characterized in that: The telescopic rod (360) is composed of a telescopic main rod, a telescopic sub-rod, a spring, and a gasket installed at the inner end of the telescopic sub-rod.

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