High-voltage electric counterbalance forklift truck

Abstract

The invention discloses a high-voltage electric counterbalance forklift truck, which belongs to the technical field of forklift trucks, and comprises an electric counterbalance forklift truck body and an L-shaped overhead guard, the head end of the electric counterbalance forklift truck body is provided with a cargo lifting mechanism; a power battery assembly for supplying power to the electric counterbalance forklift body is arranged at the top of the electric counterbalance forklift body, a first moving frame mechanism and a second moving frame mechanism are sequentially arranged at the tail end of the electric counterbalance forklift body, and the first moving frame mechanism and the second moving frame mechanism are connected through a connecting mechanism. The first moving frame mechanism is used in cooperation with the power battery assembly, the design of a fixed balance weight component is abandoned, an adjustable balance weight structure is adopted, the length of a force arm of a balance weight block is freely adjusted according to the weight of lifted cargoes, safety of the forklift under different working conditions can be guaranteed, and the operation flexibility can be improved; and potential safety hazards and resource waste caused by insufficient or excessive counterweight are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of forklifts, and in particular relates to a high-voltage electric counterbalanced forklift. Background Art

[0002] High-voltage electric counterbalanced forklifts are important equipment in the field of industrial handling. Based on high-voltage electric drive technology, they have the characteristics of high efficiency, environmental protection, and stability. Their design takes "counterweight" as the key feature and is widely used in warehousing and logistics, factory workshops, port terminals and other scenarios. They are mainly used for loading and unloading, stacking, horizontal handling and short-distance transportation of goods.

[0003] The battery pack of existing high-voltage electric counterbalanced forklifts is usually installed under the driver's seat, which affects the natural heat dissipation effect of the battery pack. The distance between the battery pack and the front wheel support point of the forklift is short, resulting in a short lever arm for the battery pack counterweight. It is often necessary to add a counterweight block at the rear of the forklift, which increases the load of the high-voltage electric counterbalanced forklift. In addition, the position of the counterweight component of the existing high-voltage electric counterbalanced forklift is relatively fixed. When the high-voltage electric counterbalanced forklift needs to lift heavier goods, it is usually necessary to increase the weight of the counterweight block at the rear of the forklift to ensure the stability of the high-voltage electric counterbalanced forklift during use. The existing high-voltage electric counterbalanced forklift only relies on the lifting cylinder and the lifting chain to lift the goods, which makes the lifting cylinder and the lifting chain load heavy. After long-term use, it is easy to cause the lifting cylinder hydraulic system to overload and seal failure, and may also cause the lifting chain strength attenuation and breakage risks. At the same time, since the battery pack of the existing high-voltage electric counterbalanced forklift is placed under the driver's seat, the operating space is very limited when the battery pack needs to be inspected and repaired, and the battery pack is even more difficult to remove from under the driver's seat when replaced. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a high-voltage electric counterbalanced forklift.

[0005] The technical solution adopted to solve the above technical problems is: a high-voltage electric counterbalanced forklift, comprising an electric counterbalanced forklift body and an L-shaped overhead guard, wherein the head end of the electric counterbalanced forklift body is provided with a cargo lifting mechanism, the top of the electric counterbalanced forklift body is provided with a power battery assembly for powering the electric counterbalanced forklift body, the tail end of the electric counterbalanced forklift body is provided with a first mobile frame mechanism and a second mobile frame mechanism in sequence, the first mobile frame mechanism and the second mobile frame mechanism are connected by a connecting mechanism, the top of the L-shaped overhead guard is provided with an auxiliary mechanism, and the side of the L-shaped overhead guard close to the power battery assembly is provided with an adjustment mechanism that cooperates with the auxiliary mechanism; The cargo lifting mechanism includes a gantry located at the head end of the electric counterbalanced forklift body, a bracket is provided at the front end of the gantry, two sets of cargo forks are installed on the outside of the bracket, and a lifting cylinder is provided at the front end of the electric counterbalanced forklift body, and the lifting cylinder pulls the bracket up through a lifting chain.

[0006] Furthermore, the power battery assembly includes a placement compartment located on the top of the electric counterbalanced forklift body, a battery pack for powering the electric counterbalanced forklift body is arranged inside the placement compartment, and a cover is installed on the top of the placement compartment.

[0007] Through the above technical solution, the placement chamber can provide protection for the battery pack, and the cover can also prevent external moisture or dust from entering the placement chamber and affecting the battery pack.

[0008] Furthermore, the first mobile frame mechanism includes a base assembly located at the top tail end of the electric counterbalanced forklift body, the placement bin is located on the top of the base assembly, hydraulic cylinders are symmetrically hinged at the middle positions on both sides of the electric counterbalanced forklift body, and the top ends of the two groups of hydraulic cylinders are respectively hinged to the two sides of the placement bin, and the tail end of the electric counterbalanced forklift body is provided with a first support frame fixedly connected to the base assembly, and second slide grooves are symmetrically opened at the tail of the two ends of the electric counterbalanced forklift body, and second sliders that cooperate with the second slide grooves are symmetrically installed on both sides of the inner side of the first support frame, and first support wheels are evenly installed on the bottom of the first support frame.

[0009] Through the above technical solution, the two groups of hydraulic cylinders are controlled to extend, pushing the base assembly and the placement bin to move toward the rear end of the electric counterbalanced forklift body, thereby adjusting the length of the lever arm between the placement bin and the front wheel support point of the electric counterbalanced forklift body, so that the entire forklift can lift heavier goods. During this process, the second slider slides in the second slide groove and the first support wheel rolls on the ground.

[0010] Furthermore, the base assembly includes a mobile base located on the top of the electric counterbalanced forklift body, and first slide grooves are symmetrically opened on both sides of the top of the electric counterbalanced forklift body. First sliders are arranged inside the first slide grooves, and the tops of the two groups of first sliders are fixedly connected to the bottom of the mobile base.

[0011] Through the above technical solution, when the hydraulic cylinder extends, the hydraulic cylinder pushes the placement bin and the mobile base to move toward the rear end of the electric counterbalanced forklift body. During the process, the first slider slides in the first slide groove to ensure the stability of the placement bin during movement.

[0012] Furthermore, the second mobile frame mechanism includes two groups of connecting slots opened on both sides of one end of the first support frame, and connecting rods are movably inserted inside the connecting slots, and the second support frame is jointly installed with one end of the two groups of connecting rods away from the first support frame. The two sides of the top of the second support frame are symmetrically hinged with connecting rods, and the top ends of the two groups of connecting rods are hinged to one end of the placement bin, and the bottom of the placement bin is hinged to the top of the mobile base near the end of the second support frame. A counterweight bin is provided on the outside of the second support frame, and second support wheels are evenly installed on the bottom of the second support frame.

[0013] Through the above technical solution, after the mobile base moves to the rearmost end of the electric counterbalanced forklift body, the hydraulic cylinder is continued to be controlled to extend, forcing the placement bin to gradually rotate to an inclined state with the hinge axis between it and the mobile base as the axis. During the process, the placement bin pushes the second support frame gradually away from the first support frame through the connecting rod, the second support wheel rolls on the ground, and the connecting rod gradually extends from the connecting slot. If necessary, counterweight blocks can be added to the counterweight bin to increase the weight of goods that the entire forklift can lift.

[0014] Furthermore, the connecting mechanism includes two groups of movable columns hinged on both sides of the second support frame, and limit blocks are installed on the top ends of the movable columns. Limit slots adapted to the movable columns are symmetrically provided on both sides of the first support frame.

[0015] Through the above technical solution, when the battery pack does not need to be repaired or replaced, the movable column can be rotated to be locked in the limit slot, and the limit block restricts the movable column from being horizontally withdrawn from the limit slot. In this way, the first support frame is always connected to the second support frame, which also restricts the placement bin from rotating to a tilted state with the hinge axis between it and the mobile base as the axis.

[0016] Furthermore, the auxiliary mechanism includes two groups of first guide wheels located at the top of both sides of the door frame, second guide wheels are symmetrically installed on both sides of the top of the L-shaped overhead guard frame, third guide wheels are symmetrically installed on both sides of the L-shaped overhead guard frame close to the placement bin, and connecting ropes are symmetrically installed on both sides of the top of the movable base, and the connecting ropes are successively passed around the third guide wheel, the second guide wheel and the first guide wheel and then fixedly connected to the top of the bracket.

[0017] Through the above technical solution, after the mobile base moves toward the rear end of the electric counterbalanced forklift body, the mobile base can give the bracket an upward force through the connecting rope, thereby reducing the load on the lifting cylinder and lifting chain during the process of the fork driving the goods to rise or fall. During the lifting process of the bracket, the connecting rope will also drive the first guide wheel, the second guide wheel and the third guide wheel to rotate.

[0018] Furthermore, the adjustment mechanism includes a sliding rod, which is provided with two groups of sliding rods, and the two groups of sliding rods are respectively fixed to the top ends of both sides of the L-shaped overhead guard close to the placement bin. A sliding seat is provided on the sliding rod, and the tail ends of the two groups of sliding rods are both installed with a block. The side where the two groups of sliding seats are close to each other is symmetrically provided with a fourth guide wheel that cooperates with the connecting rope. A reset spring is installed at the bottom of the sliding seat, and the other end of the reset spring is fixedly connected to the block. The outer thread of the sliding seat is provided with a butterfly screw, and one end of one side of the sliding rod is provided with a fixing hole that cooperates with the butterfly screw.

[0019] Through the above technical solution, when the forklift lifts cargo of normal weight, the fork rises to the highest point, the connecting rope can no longer give the bracket an upward force, and the connecting rope is also in a relaxed state. At this time, the reset spring pulls the sliding seat to slide on the slide rod, and the fourth guide wheel will automatically re-tighten the connecting rope after moving. When the forklift fork descends, the reset spring is stretched again, thereby preventing the connecting rope from accidentally detaching from the guide wheels. When the forklift lifts heavier cargo, the butterfly screw is manually tightened at the original length of the reset spring so that its top is stuck in the fixing hole. At this time, the connecting rope is always in a taut state, and as the mobile base moves toward the rear end of the electric counterbalanced forklift body, the connecting rope can give the bracket an upward force, thereby reducing the load on the lifting cylinder and lifting chain during the process of the bracket driving the cargo to descend.

[0020] Furthermore, guardrails are symmetrically installed on both sides of the electric counterbalanced forklift body, a shield is installed at one end of the L-shaped overhead guard, the top of the block is fixedly connected to the bottom of the shield, and the bottom of the block is fixedly connected to one end of the top of the guardrail.

[0021] Through the above technical solution, the guardrail can provide protection for both sides of the placement bin, while the shield can provide shade and reduce the amount of dust falling on the cover, thereby ensuring the natural heat dissipation effect of the entire placement bin.

[0022] Furthermore, a pad is provided at a middle position on the top of the second support frame, and a rubber pad layer is provided on the top of the pad.

[0023] Through the above technical solution, during the tilting process of the placement bin, one end of the placement bin will gradually rest on the rubber pad of the cushion block. The cushion block and the rubber pad can provide stable support for the placement bin, which can not only avoid extrusion damage to the surface of the placement bin, but also reduce the supporting load of the two sets of connecting rods.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention can greatly improve the natural heat dissipation effect and extend the battery life by arranging the power battery assembly on the top of the electric counterbalanced forklift body and arranging it in a well-ventilated place. At the same time, it can increase the distance between the battery pack and the front wheel support point, extend the counterweight arm, reduce or even eliminate the need for additional tail counterweight blocks, effectively reduce the weight of the forklift and reduce energy consumption; (2) The present invention uses the first mobile frame mechanism in conjunction with the power battery assembly, abandons the fixed counterweight component design, and adopts an adjustable counterweight structure. The length of the counterweight arm can be freely adjusted according to the weight of the lifted cargo, which can ensure the safety of the forklift under different working conditions and improve the operational flexibility, avoiding safety hazards and resource waste caused by insufficient or excessive counterweight; (3) The present invention uses the first mobile frame mechanism, the auxiliary mechanism and The coordinated use of the adjustment mechanism no longer relies solely on the lifting cylinder and chain, and introduces an auxiliary lifting structure to disperse the cargo lifting load, significantly reducing the risk of overload and seal failure of the lifting cylinder hydraulic system, reducing the hidden dangers of strength attenuation and breakage of the lifting chain, extending the service life of components, and reducing maintenance costs; (4) The present invention uses the first mobile frame mechanism and the second mobile frame mechanism in coordination. When the power battery assembly is set on the top of the electric counterbalanced forklift body, it avoids placing the power battery assembly in the narrow space under the driver's seat, reserving sufficient operating space for battery pack maintenance, and when the battery pack is replaced, it can also automatically tilt the placement bin to a suitable angle, making it easier for the operator to take out and replace the battery pack, greatly shortening the maintenance time, improving maintenance convenience and efficiency, and reducing maintenance difficulty and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a first perspective structural diagram of the present invention; Figure 2 This is a structural diagram from a second perspective of the present invention; Figure 3 This is a schematic structural diagram of the power battery assembly of the present invention moving toward the rear of a forklift; Figure 4 This is a schematic diagram of the structure of the power battery assembly of the present invention after tilting; Figure 5 This is a first-perspective structural diagram of the present invention; Figure 6 This is a second perspective structural diagram of the present invention; Figure 7 This is a structural diagram of the power battery assembly of the present invention from a first perspective; Figure 8 This is a structural diagram of the power battery assembly of the present invention from a second perspective; Figure 9 This is a structural diagram of the first movable frame mechanism of the present invention from a first perspective; Figure 10is a structural diagram of the first movable frame mechanism from a second perspective of the present invention; Figure 11 is a structural diagram of the second movable frame mechanism of the present invention from a first perspective; Figure 12 is a structural diagram of the second movable frame mechanism of the present invention from a second perspective; Figure 13 It is a three-dimensional schematic diagram of the electric counterbalanced forklift body of the present invention; Figure 14 This is a structural diagram of the adjustment mechanism of the present invention from a first perspective; Figure 15 This is a structural diagram of the adjustment mechanism of the present invention from a second viewing angle; Figure 16 This invention Figure 3 Enlarged view of point A.

[0026] Figure 1: Electric counterbalanced forklift body; 2: L-shaped overhead guard; 3: Cargo lifting mechanism; 301: Door frame; 302: Bracket; 303: Fork; 304: Lifting cylinder; 305: Lifting chain; 4: Power battery assembly; 401: Placement compartment; 402: Battery pack; 403: Cover; 5: First mobile frame mechanism; 501: Base assembly; 5011: Mobile base; 5012: First chute; 5013: First slider; 502: Hydraulic cylinder; 503: First support frame; 504: Second chute; 505: Second slider; 506: First support wheel; 6: Second mobile frame Movable frame mechanism; 601, connecting slot; 602, connecting rod; 603, second support frame; 604, connecting rod; 605, counterweight bin; 606, second support wheel; 7, connecting mechanism; 701, movable column; 702, limit block; 703, limit slot; 8, auxiliary mechanism; 801, first guide wheel; 802, second guide wheel; 803, third guide wheel; 804, connecting rope; 9, adjusting mechanism; 901, slide rod; 902, stop block; 903, sliding seat; 904, fourth guide wheel; 905, reset spring; 906, butterfly screw; 907, fixing hole; 10, guardrail. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] like Figures 1-4 and Figure 7-Figure 8As shown, a high-voltage electric counterbalanced forklift of this embodiment includes an electric counterbalanced forklift body 1 and an L-shaped overhead guard frame 2. The head end of the electric counterbalanced forklift body 1 is provided with a cargo lifting mechanism 3. The top of the electric counterbalanced forklift body 1 is provided with a power battery assembly 4 for powering the electric counterbalanced forklift body 1. The cargo lifting mechanism 3 includes a gantry 301 located at the head end of the electric counterbalanced forklift body 1, a bracket 302 is provided at the front end of the gantry 301, two sets of forks 303 are installed on the outside of the bracket 302, a lifting cylinder 304 is provided at the front end of the electric counterbalanced forklift body 1, and the lifting cylinder 304 pulls the bracket 302 up through a lifting chain 305, and the power battery assembly 4 includes an installation at the top of the electric counterbalanced forklift body 1. The storage bin 401 is provided with a battery pack 402 for supplying power to the electric counterbalanced forklift body 1, and a cover 403 is installed on the top of the storage bin 401. By placing the battery pack 402 on the top of the electric counterbalanced forklift body 1 and arranging it in a well-ventilated place, the natural heat dissipation effect can be greatly improved, the battery life can be extended, and at the same time, the distance between the battery pack and the front wheel support point is increased, and the counterweight arm is extended. When the fork 303 lifts the goods, the lifting cylinder 304 pulls the bracket 302 up through the lifting chain 305, and the battery pack 402 can be used as a counterweight to improve the stability of the entire forklift during the lifting process, reduce or even eliminate the need for additional counterweight blocks, effectively reduce the forklift's own weight, and reduce energy consumption.

[0029] like Figures 1-6 、 Figure 9-10 、 Figure 13 and Figure 16As shown, the tail end of the electric counterbalanced forklift body 1 of this embodiment is provided with a first mobile frame mechanism 5, the first mobile frame mechanism 5 includes a base assembly 501 located at the top tail end of the electric counterbalanced forklift body 1, the placement bin 401 is located at the top of the base assembly 501, and hydraulic cylinders 502 are symmetrically hinged at the middle positions on both sides of the electric counterbalanced forklift body 1, and the top ends of the two groups of hydraulic cylinders 502 are respectively hinged to the two sides of the placement bin 401, and the tail end of the electric counterbalanced forklift body 1 is provided with a first support frame 503 fixedly connected to the base assembly 501, and second slide grooves 504 are symmetrically opened at the tail of the two ends of the body of the electric counterbalanced forklift body 1, and second sliders 505 that cooperate with the second slide grooves 504 are symmetrically installed on both sides of the inner side of the first support frame 503, and first support wheels 506 are evenly installed on the bottom of the first support frame 503, and the base assembly 501 includes a mobile base 5011 located on the top of the body of the electric counterbalanced forklift body 1. The first support wheel 506 is provided with a first slide groove 5012, and the first support wheel 506 is provided with a first slide groove 5013. The tops of the two groups of first slide grooves 5013 are fixedly connected to the bottom of the mobile base 5011 to control the extension of the two groups of hydraulic cylinders 502. The hydraulic cylinders 502 push the placement bin 401 and the mobile base 5011 to move toward the rear end of the electric counterbalanced forklift body 1. During the process, the first slide groove 5013 slides in the first slide groove 5012, thereby adjusting the length of the lever arm between the placement bin 401 and the front wheel support point of the electric counterbalanced forklift body 1, so that the entire forklift can lift heavier goods. During the process, the second slide groove 505 slides in the second slide groove 504, and the first support wheel 506 rolls on the ground. By adopting a structure with adjustable counterweight lever arm length, the counterweight lever arm length can be freely adjusted according to the weight of the lifted goods, which can ensure the safety of the forklift under different working conditions and improve the operation flexibility, thereby avoiding safety hazards and waste of resources caused by insufficient or excessive counterweight.

[0030] like Figure 5-Figure 6 、 Figure 10-12 and Figure 16As shown, the tail end of the electric counterbalanced forklift body 1 of this embodiment is provided with a second mobile frame mechanism 6, and the second mobile frame mechanism 6 includes two groups of connecting slots 601 opened on both sides of one end of the first support frame 503, and a connecting rod 602 is movably inserted inside the connecting slot 601. The two groups of connecting rods 602 are jointly installed with the second support frame 603 at one end away from the first support frame 503, and the two sides of the top of the second support frame 603 are symmetrically hinged with connecting rods 604, and the tops of the two groups of connecting rods 604 are hinged to one end of the placement bin 401, and the end of the bottom of the placement bin 401 close to the second support frame 603 is hinged to the top of the mobile base 5011, and a counterweight bin 605 is provided on the outside of the second support frame 603, and second support wheels 606 are evenly installed on the bottom of the second support frame 603. A pad is provided at the middle position of the pad, and a rubber pad is provided on the top of the pad. When replacing the battery pack 402, the mobile base 5011 is first moved to the rearmost end of the electric counterbalanced forklift body 1, and then the hydraulic cylinder 502 is continued to be controlled to extend, forcing the placement bin 401 to gradually rotate to a tilted state with the hinge axis between it and the mobile base 5011 as the axis. During the process, the placement bin 401 pushes the second support frame 603 gradually away from the first support frame 503 through the connecting rod 604, the second support wheel 606 rolls on the ground, and the connecting rod 602 gradually extends out from the connecting slot 601. After tilting the placement bin 401 to a suitable angle, it is convenient for the operator to take out and replace the battery pack 402, which greatly shortens the maintenance time, improves the convenience and efficiency of maintenance, and reduces the difficulty of maintenance and labor costs.

[0031] like Figure 2 and Figure 16 As shown, the first movable frame mechanism 5 and the second movable frame mechanism 6 of this embodiment are connected by a connecting mechanism 7, and the connecting mechanism 7 includes two groups of movable columns 701 hinged on both sides of the second support frame 603, and a limiting block 702 is installed on the top of the movable column 701. The two sides of the first support frame 503 are symmetrically provided with limiting slots 703 adapted to the movable columns 701. When the battery pack 402 does not need to be repaired or replaced, the movable columns 701 can be rotated to be inserted into the limiting slots 703. The limiting blocks 702 limit the movable columns 701 from being horizontally withdrawn from the limiting slots 703. In this way, the first support frame 503 is always connected to the second support frame 603, which also limits the placement bin 401 from rotating to a tilted state with the hinge axis between it and the movable base 5011 as the axis.

[0032] Furthermore, in this embodiment, when the battery pack 402 needs to be inspected and replaced, the movable column 701 is manually rotated to stand upright so that it leaves the limit slot 703. Then, as the hydraulic cylinder 502 continues to extend, the second support frame 603 can gradually move away from the first support frame 503, thereby allowing the placement chamber 401 to rotate to a tilted state.

[0033] like Figure 4 、 Figure 13-15 As shown in the figure, the top of the L-shaped overhead guard 2 of this embodiment is provided with an auxiliary mechanism 8, and the side of the L-shaped overhead guard 2 close to the power battery assembly 4 is provided with an adjustment mechanism 9 that cooperates with the auxiliary mechanism 8. The auxiliary mechanism 8 includes two sets of first guide wheels 801 located at the top of both sides of the door frame 301, and second guide wheels 802 are symmetrically installed on both sides of the top of the L-shaped overhead guard 2. Third guide wheels 803 are symmetrically installed on both sides of the side of the L-shaped overhead guard 2 close to the placement bin 401. Connecting ropes 804 are symmetrically installed on both sides of the top of the mobile base 5011. , and the connecting rope 804 is fixedly connected to the top of the bracket 302 after passing through the third guide wheel 803, the second guide wheel 802 and the first guide wheel 801 in sequence. The adjusting mechanism 9 includes a slide bar 901. The slide bar 901 is provided with two groups, and the two groups of slide bars 901 are respectively fixed to the top of both sides of the L-shaped top guard 2 close to the placement bin 401. A sliding seat 903 is provided on the slide bar 901. The tail ends of the two groups of slide bars 901 are both equipped with a stopper 902. The two groups of slide bars 903 are symmetrically provided with a stopper 902 on the side close to each other that matches the connecting rope 804. The fourth guide wheel 904 is combined, and a reset spring 905 is installed at the bottom of the sliding seat 903, and the other end of the reset spring 905 is fixedly connected to the stopper 902. The outer thread of the sliding seat 903 is provided with a butterfly screw 906, and one end of one side of the slide rod 901 is provided with a fixing hole 907 that cooperates with the butterfly screw 906. Guardrails 10 are symmetrically installed on both sides of the electric counterbalanced forklift body 1, and a shield is installed at one end of the L-shaped overhead guard 2. The top of the stopper 902 is fixedly connected to the bottom of the shield, and the bottom of the stopper 902 is fixedly connected to the shield. One end of the top of the guardrail 10 is fixedly connected. When the forklift lifts heavier goods, the butterfly screw 906 is manually tightened after the tension spring 905 is reset to its original length so that its top is stuck in the fixing hole 907. At this time, the connecting rope 804 is always in a taut state. As the mobile base 5011 moves toward the rear end of the electric counterbalanced forklift body 1, the mobile base 5011 gives an upward force to the bracket 302 through the connecting rope 804, thereby reducing the load on the lifting cylinder 304 and the lifting chain 305 during the lifting process of the goods driven by the bracket 302.

[0034] Furthermore, in this embodiment, when the forklift lifts cargo of normal weight, the butterfly screw 906 is manually tightened so that its top is out of the fixing hole 907. After the fork 303 rises to the highest point, the connecting rope 804 can no longer provide the bracket with an upward force, and the connecting rope 804 is also in a relaxed state. At this time, the reset spring 905 pulls the sliding seat 903 to slide on the slide bar 901. After the fourth guide wheel 904 moves, it will automatically re-tighten the connecting rope 804. When the forklift fork 303 descends, the reset spring 905 is stretched again, and the connecting rope 804 is always in a taut state, thereby preventing the connecting rope 804 from accidentally detaching from the guide wheels.

[0035] The working principle of this embodiment is as follows: when it is necessary to lift lighter cargo, the butterfly screw 906 is manually tightened to remove its top end from the fixing hole 907, and the electric counterbalanced forklift body 1 is controlled to move until the fork 303 is deeply under the cargo. Then, the lifting cylinder 304 is controlled to cooperate with the lifting chain 305 to lift the bracket 302, the fork 303, and the cargo above the fork 303 together; When lifting heavier cargo, manually tighten the butterfly screw 906 so that its top end is stuck in the fixing hole 907, controlling the extension of the hydraulic cylinder 502 to push the mobile base 5011 to move on the top of the electric counterbalanced forklift body 1 toward its tail end, driving the placement bin 401 to move synchronously. During this process, the mobile base 5011 pulls the bracket 302 upward through the connecting rope 804, and then cooperates with the lifting cylinder 304 and the lifting chain 305 to apply force to lift the cargo on the fork 303; When the battery pack 402 needs to be inspected and replaced, the movable column 701 is first rotated to stand upright so that it leaves the limit slot 703. After the placement bin 401 has moved to the rear end of the electric counterbalanced forklift body 1, the hydraulic cylinder 502 is controlled to continue to extend. During the process, the hydraulic cylinder 502 pushes the placement bin 401 to rotate and gradually tilt around its hinge axis with the mobile base 5011, and the placement bin 401 pushes the connecting rod 602 through the connecting rod 604 to gradually extend out of the connecting slot 601 on the first support frame 503, and the second support frame 603 also gradually moves away from the first support frame 503 until one end of the placement bin 401 rests on the rubber pad layer of the pad. After that, the operator can open the cover 403 and inspect and replace the battery pack 402.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A high-voltage electric counterbalanced forklift, comprising an electric counterbalanced forklift body (1) and an L-shaped overhead guard (2), characterized in that: The head end of the electric counterbalanced forklift body (1) is provided with a cargo lifting mechanism (3), the top of the electric counterbalanced forklift body (1) is provided with a power battery assembly (4) for supplying power to the electric counterbalanced forklift body (1), the tail end of the electric counterbalanced forklift body (1) is provided with a first mobile frame mechanism (5) and a second mobile frame mechanism (6) in sequence, the first mobile frame mechanism (5) and the second mobile frame mechanism (6) are connected via a connecting mechanism (7), the top of the L-shaped overhead guard (2) is provided with an auxiliary mechanism (8), and a side of the L-shaped overhead guard (2) close to the power battery assembly (4) is provided with an adjustment mechanism (9) that cooperates with the auxiliary mechanism (8); The cargo lifting mechanism (3) comprises a gantry (301) located at the head end of an electric counterbalanced forklift body (1), a bracket (302) being provided at the front end of the gantry (301), two sets of cargo forks (303) being installed on the outer side of the bracket (302), and a lifting cylinder (304) being provided at the front end of the electric counterbalanced forklift body (1), and the lifting cylinder (304) pulls the bracket (302) upward via a lifting chain (305).

2. The high-voltage electric counterbalanced forklift according to claim 1, characterized in that: The power battery assembly (4) comprises a placement compartment (401) located on the top of the electric counterbalanced forklift body (1), a battery pack (402) for supplying power to the electric counterbalanced forklift body (1) is arranged inside the placement compartment (401), and a cover (403) is installed on the top of the placement compartment (401).

3. The high-voltage electric counterbalanced forklift according to claim 2, characterized in that: The first mobile frame mechanism (5) includes a base assembly (501) located at the top tail end of the electric counterbalanced forklift body (1), the placement bin (401) is located at the top of the base assembly (501), hydraulic cylinders (502) are symmetrically hinged at the middle positions on both sides of the electric counterbalanced forklift body (1), and the top ends of the two groups of hydraulic cylinders (502) are respectively hinged to the two sides of the placement bin (401), a first support frame (503) fixedly connected to the base assembly (501) is provided at the tail end of the electric counterbalanced forklift body (1), second slide grooves (504) are symmetrically opened at the tail ends of the two ends of the electric counterbalanced forklift body (1), second sliders (505) that cooperate with the second slide grooves (504) are symmetrically installed on the inner sides of the first support frame (503), and first support wheels (506) are evenly installed on the bottom of the first support frame (503).

4. The high-voltage electric counterbalanced forklift according to claim 3, characterized in that: The base assembly (501) comprises a movable base (5011) located on the top of the electric counterbalanced forklift body (1), first slide grooves (5012) are symmetrically provided on both sides of the top of the electric counterbalanced forklift body (1), first sliders (5013) are provided inside the first slide grooves (5012), and the tops of the two groups of first sliders (5013) are fixedly connected to the bottom of the movable base (5011).

5. The high-voltage electric counterbalanced forklift according to claim 4, characterized in that: The second mobile frame mechanism (6) includes two groups of connecting slots (601) opened on both sides of one end of the first support frame (503), and connecting rods (602) are movably inserted inside the connecting slots (601). The second support frame (603) is installed together at one end of the two groups of connecting rods (602) away from the first support frame (503). Connecting rods (604) are symmetrically hinged on both sides of the top of the second support frame (603), and the top ends of the two groups of connecting rods (604) are hinged to one end of the placement bin (401). The bottom end of the placement bin (401) close to the second support frame (603) is hinged to the top of the mobile base (5011). A counterweight bin (605) is provided on the outside of the second support frame (603), and second support wheels (606) are evenly installed on the bottom of the second support frame (603).

6. The high-voltage electric counterbalanced forklift according to claim 5, characterized in that: The connecting mechanism (7) comprises two groups of movable columns (701) hinged on both sides of the second support frame (603), and the top ends of the movable columns (701) are provided with limit blocks (702). The first support frame (503) is symmetrically provided with limit slots (703) adapted to the movable columns (701) on both sides.

7. The high-voltage electric counterbalanced forklift according to claim 4, characterized in that: The auxiliary mechanism (8) comprises two groups of first guide wheels (801) located at the top ends of both sides of the door frame (301); second guide wheels (802) are symmetrically installed on both sides of the top of the L-shaped overhead guard (2); third guide wheels (803) are symmetrically installed on both sides of the side of the L-shaped overhead guard (2) close to the placement bin (401); connecting ropes (804) are symmetrically installed on both sides of the top of the mobile base (5011); and the connecting ropes (804) are fixedly connected to the top of the bracket (302) after passing through the third guide wheel (803), the second guide wheel (802) and the first guide wheel (801) in sequence.

8. The high-voltage electric counterbalanced forklift according to claim 2, characterized in that: The adjusting mechanism (9) includes a slide bar (901), which is provided with two groups of slide bars (901), and the two groups of slide bars (901) are respectively fixed to the top ends of both sides of the L-shaped top guard (2) close to the placement bin (401), and a slide seat (903) is provided on the slide bar (901). The tail ends of the two groups of slide bars (901) are both installed with a stopper (902). The sides of the two groups of slide bars (903) close to each other are symmetrically provided with a fourth guide wheel (904) that cooperates with the connecting rope (804), and a reset spring (905) is installed at the bottom of the slide bar (903), and the other end of the reset spring (905) is fixedly connected to the stopper (902). The outer thread of the slide bar (903) is provided with a butterfly screw (906), and one end of one side of the slide bar (901) is provided with a fixing hole (907) that cooperates with the butterfly screw (906).

9. The high-voltage electric counterbalanced forklift according to claim 8, characterized in that: Guardrails (10) are symmetrically installed on both sides of the electric counterbalanced forklift body (1), a shield is installed at one end of the L-shaped overhead guard (2), the top of the block (902) is fixedly connected to the bottom of the shield, and the bottom of the block (902) is fixedly connected to one end of the top of the guardrail (10).

10. The high-voltage electric counterbalanced forklift according to claim 5, characterized in that: A cushion block is provided at the middle position of the top of the second support frame (603), and a rubber cushion layer is provided on the top of the cushion block.

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