Novel forklift overhead guard structure

Abstract

A novel forklift overhead guard structure belongs to the technical field related to forklifts and comprises an overhead guard, an open groove is formed in the overhead guard, the overhead guard comprises a left side beam and a right side beam relative to the open groove, the left side beam and the right side beam are oppositely arranged, a first sliding hole is formed in the end face, facing the right side beam, of the left side beam in an extending mode along the axis of the left side beam, and a second sliding hole is formed in the end face of the right side beam. A second sliding hole is formed from the right side beam to the end face of the left side beam and extends along the axis of the right side beam; a reinforcing beam is arranged in the first sliding hole in a sliding mode, one end of the reinforcing beam is located in the left side beam, a one-way sliding locking mechanism is arranged on the reinforcing beam, and the reinforcing beam can freely slide towards the right side beam through the one-way sliding locking mechanism and can slide in a reverse unlocking mode. According to the overhead guard, the strength of the opening groove of the overhead guard can be enhanced, a hydrogen fuel system or a storage battery can be conveniently taken and placed, extra tools are not needed, operation is easy and convenient, and replacement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to forklifts, and more specifically, particularly relates to a novel forklift overhead guard structure. Background Art

[0002] In the field of forklifts, battery forklifts need to frequently replace batteries, so their overhead guard structures are different from those of traditional forklifts. For example, the electric forklift provided in Chinese patent CN202847405U (published on February 3, 2013) has an opening slot on its overhead guard facing the cavity (the location for installing the battery). Since the opening slot is provided on the overhead guard facing the cavity, the battery can be hoisted into the cavity by a lifting device (the hoisting rope can hoist the battery to the cavity through the opening slot).

[0003] Although the above-mentioned overhead guard realizes the battery lifting operation, the overhead guard is provided with an open groove. When subjected to external force impact from the top (especially on battery counterbalanced forklifts of 4 tons and above because the national standard requires them to withstand high impact loads), the opening of the ceiling will form a large deformation due to insufficient impact resistance, and the deformation is irreversible. When the pressure reaches a certain amount, the overhead guard will be scrapped due to deformation, and even the driver may be injured.

[0004] In order to solve the problem of reduced structural strength of the overhead guard, Chinese patent CN206307964U optimizes the structure of the overhead guard: a fixed structure is set at the opening groove of the overhead guard, and the fixed structure is fixed with bolts. Every time lifting is required, the bolts need to be taken out, which is cumbersome and time-consuming, and is not conducive to rapid replacement of the battery. Utility Model Content

[0005] 1. Technical issues

[0006] In summary, how to solve the problem of reduced structural strength of the existing overhead guard and complicated structural reinforcement operation has become an urgent problem to be solved by those skilled in the art.

[0007] (II) Technical solution

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] The utility model provides a novel forklift overhead guard structure, which includes an overhead guard (installed on a forklift). In the utility model, an open slot is provided on the overhead guard. Relative to the open slot, the overhead guard includes a left beam and a right beam. The left beam is arranged opposite to the right beam. A first sliding hole is provided from the left beam toward the end surface of the right beam and extending along the axis of the left beam. A second sliding hole is provided from the right beam toward the end surface of the left beam and extending along the axis of the right beam.

[0010] A reinforcing beam is slidably arranged in the first sliding hole, one end of the reinforcing beam is located in the left beam and a one-way sliding locking mechanism is arranged on it, the reinforcing beam can slide freely toward the right beam through the one-way sliding locking mechanism and can slide in the reverse direction by unlocking, and the other end of the reinforcing beam can be slidably inserted into the second sliding hole to realize a rigid connection between the left beam and the right beam.

[0011] Preferably, in the new forklift overhead guard structure provided by the utility model, the one-way sliding locking mechanism includes a self-locking block, which is rotatably arranged in the reinforcing beam through an installation shaft, and the axis of the installation shaft is perpendicular to the axis of the reinforcing beam; an elastic device is also provided on the self-locking block, which is used to apply a self-locking elastic force to the self-locking block to rotate in the direction of the right beam; the self-locking block is provided with a self-locking end, and a self-locking window is provided on the reinforcing beam corresponding to the self-locking end, and when the reinforcing beam is in the extreme extension state, a first locking groove opposite to the self-locking window is provided in the first sliding hole; an unlocking rod for controlling the self-locking block to overcome the self-locking elastic force for unlocking and rotating is also provided on the self-locking block, and a left beam sliding groove for the unlocking rod to extend and slide is provided on the left beam.

[0012] Preferably, in the novel forklift overhead guard structure provided by the utility model, the side of the self-locking end facing the right beam is the front side surface, and the front side surface is an inclined surface inclined forward.

[0013] Preferably, in the novel forklift overhead guard structure provided by the utility model, the vertical projection of the installation axis is located in front of the vertical projection of the inclined surface.

[0014] Preferably, in the novel forklift overhead guard structure provided by the present invention, the self-locking end has an extension portion extending in the direction away from the right beam, and the extension portion can pass through the self-locking window and be stuck in the first locking groove.

[0015] Preferably, in the novel forklift overhead guard structure provided by the utility model, a mounting column is provided on the upper side of the extension portion, the elastic device is installed on the mounting column, and the elastic device is compressed and arranged between the upper side of the extension portion and the top surface of the reinforcing beam.

[0016] Preferably, in the novel forklift overhead guard structure provided by the utility model, the elastic device is a spring.

[0017] Preferably, in the novel forklift overhead guard structure provided by the utility model, when the reinforcing beam is in the limit state of retraction, a second locking groove opposite to the self-locking window is provided in the first sliding hole.

[0018] Preferably, in the novel forklift overhead guard structure provided by the utility model, a stopper capable of abutting against the head end of the reinforcing beam is arranged in the second sliding hole.

[0019] Preferably, in the novel forklift overhead guard structure provided by the utility model, a push rod for pushing the reinforcement beam to slide in the first sliding hole is further provided on the reinforcement beam, and the push rod can slide in the left beam sliding groove.

[0020] (III) Beneficial effects

[0021] As can be seen from the above, the utility model provides a new type of forklift overhead guard structure. In the utility model, an open slot is provided on the overhead guard. Relative to the open slot, the overhead guard includes a left beam and a right beam. The left beam and the right beam are arranged opposite to each other. A first sliding hole is provided from the left beam toward the end face of the right beam and extends along the axis of the left beam. A second sliding hole is provided from the right beam toward the end face of the left beam and extends along the axis of the right beam. A reinforcing beam is slidably provided in the first sliding hole. One end of the reinforcing beam is located in the left beam and a one-way sliding locking mechanism is provided thereon. The reinforcing beam can slide freely toward the right beam through the one-way sliding locking mechanism and can be unlocked and slid in the reverse direction. The other end of the reinforcing beam can be slidably inserted into the second sliding hole to realize a rigid connection between the left beam and the right beam. The utility model purpose of the utility model is: while strengthening the strength of the open slot structure, the position state of the reinforcing structure can be quickly changed, and the opening of the open slot reinforcing structure is simplified, thereby facilitating the replacement of batteries. Through the above structural design, when the fuel system needs to be replaced, the reinforcing beam can be retracted into one of the side beams by only pushing the unlocking push rod. After the battery is replaced, the reinforcing beam is pushed into the other side beam by the forward push rod and self-locked, so as to achieve the purpose of strengthening the strength of the opening groove. No tools are required, which is fast and convenient. The utility model can not only strengthen the strength of the opening groove of the overhead guard, but also facilitate the removal and placement of the hydrogen fuel system or the battery. No additional tools are required, the operation is simple and convenient, and the replacement efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0023] Figure 1 It is a structural schematic diagram of the side beam of the overhead guard frame when the reinforcing beam is in the forward limit state (the opening groove is locked) in the embodiment of the utility model;

[0024] Figure 2 It is a top view of the side beam of the overhead guard frame in the embodiment of the utility model, in which the reinforcement beam is in the forward limit state (the opening groove is locked);

[0025] Figure 3 It is a schematic diagram of the partial structure of the side beam of the overhead guard frame in which the reinforcing beam is in the forward limit state (the open groove is locked) in the embodiment of the utility model;

[0026] Figure 4 It is an enlarged isometric view of the local structure of the side beam of the overhead guard frame in the embodiment of the utility model, when the reinforcing beam is in the forward limit state (the open groove is locked);

[0027] Figure 5 It is a structural schematic diagram of the side beam of the overhead guard frame in the embodiment of the utility model, in which the reinforcing beam is in a reverse moving state (the opening groove has just been fully opened);

[0028] Figure 6 It is a top view of the side beam of the overhead guard frame in the embodiment of the utility model, in which the reinforcing beam is in a reverse moving state (the opening groove has just been fully opened);

[0029] Figure 7 It is an enlarged schematic diagram of the local structure of the side beam of the overhead guard frame in the embodiment of the utility model, when the reinforcing beam is in a reverse moving state (the opening groove has just been fully opened);

[0030] Figure 8 It is an enlarged isometric view of the local structure of the side beam of the overhead guard frame in the embodiment of the utility model, when the reinforcing beam is in the reverse moving state (the opening groove has just been fully opened);

[0031] Fig. 9 It is a structural schematic diagram of the side beam of the overhead guard frame when the reinforcing beam is in the return limit state (the opening groove is open) in the embodiment of the utility model;

[0032] Fig.10 It is a top view of the side beam of the overhead guard frame in the embodiment of the utility model, in which the reinforcing beam is in the return limit state (the opening groove is open);

[0033] Fig.11It is a schematic diagram of the partial structure of the side beam of the overhead guard frame in which the reinforcing beam is in the return limit state (the opening groove is open) in the embodiment of the utility model;

[0034] Fig.12 It is an enlarged axonometric view of the local structure of the side beam of the overhead guard frame when the reinforcement beam is in the return limit state (the opening groove is open) in the embodiment of the utility model.

[0035] exist Figures 1 to 3 In the figure, the corresponding relationship between the component names and the reference numerals is as follows:

[0036] Left beam 1, right beam 2, reinforcement beam 3, self-locking block 4, elastic device 5, unlocking rod 6,

[0037] Install column 7, stopper 8, push rod 9. DETAILED DESCRIPTION

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0039] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0040] Please refer to Figures 1 to 12The utility model provides a novel forklift overhead guard structure. In order to facilitate the hoisting of the battery, the utility model is provided with an open slot on the overhead guard. In order to facilitate the structural description, when the overhead guard is installed on the forklift, the direction of the overhead guard toward the forklift head is the front, and the direction of the overhead guard toward the forklift head is the rear. The open slot is provided on one side of the overhead guard (one of the left and right sides), and the other side is a complete frame structure. On the side of the overhead guard provided with the open slot, the side beam of the overhead guard is divided into two parts, namely the left beam 1 (the side close to the rear of the vehicle) and the right beam 2 (the side close to the front of the vehicle).

[0041] In one embodiment of the present invention, relative to the opening groove, the overhead guard (specifically, a side beam of the overhead guard) includes a left beam 1 and a right beam 2 (due to the provision of the opening groove, the side beam of the overhead guard on this side is disconnected to form two "beam" structures), the left beam 1 and the right beam 2 are arranged opposite to each other (in the direction from the rear end of the vehicle to the front end of the vehicle), a first sliding hole is provided from the left beam 1 toward the end face of the right beam 2 and extending along the axis of the left beam 1, and a second sliding hole is provided from the right beam 2 toward the end face of the left beam 1 and extending along the axis of the right beam 2. When the side beam (the present invention refers to the left beam 1 and the right beam 2) adopts a metal solid beam structure, the first sliding hole and the second sliding hole can be formed into a hole structure on the left beam 1 and the right beam 2 by milling technology. When the side beam (the present invention refers to the left beam 1 and the right beam 2) adopts a steel tube beam structure, the first sliding hole and the second sliding hole specifically refer to the hollow structure of the steel tube beam. In addition, the hole shapes of the first sliding hole and the second sliding hole are not limited, and square holes, rectangular holes, round holes and elliptical holes are the optimal hole shapes.

[0042] The utility model is provided with a reinforcing beam 3 slidably arranged in the first sliding hole. The reinforcing beam 3 can be a solid structural beam made of metal or a metal tube structural beam. The reinforcing beam 3 can slide in the first sliding hole and the second sliding hole. Therefore, the outer contour of the reinforcing beam 3 is slightly smaller than the inner contour of the first sliding hole and the second sliding hole. When the reinforcing beam 3 is arranged in the first sliding hole and the second sliding hole, there is a gap of 1mm-3mm between the outer side surface of the reinforcing beam 3 and the inner side surface of the first sliding hole and the second sliding hole (the smaller the gap, the better, on the premise of ensuring that the reinforcing beam 3 can slide), thereby ensuring that the reinforcing beam 3 can slide smoothly in the first sliding hole and the second sliding hole. At the same time, due to the small gap, the structural strength of the overlapping structure between the reinforcing beam 3 and the left beam 1 and the right beam 2 can be ensured.

[0043] One end of the reinforcing beam 3 is located inside the left beam 1 and is provided with a one-way sliding locking mechanism. The reinforcing beam 3 can slide freely toward the right beam 2 through the one-way sliding locking mechanism and can be unlocked and slid in the reverse direction. The other end of the reinforcing beam 3 can be slidably inserted into the second sliding hole to realize a rigid connection between the left beam 1 and the right beam 2.

[0044] The function of the one-way sliding locking mechanism provided in the utility model is as follows: when the reinforcing beam 3 slides toward the right beam 2, the sliding of the reinforcing beam 3 in the first sliding hole and the second sliding hole is not restricted, and the reinforcing beam 3 can slide freely and be inserted into the second sliding hole to close the opening slot; however, when the reinforcing beam 3 slides in the reverse direction, the reinforcing beam 3 will be locked by the one-way sliding locking mechanism and will stop and be unable to slide. However, the operator can manually unlock the one-way sliding locking mechanism to release the state of being unable to slide, so that the reinforcing beam 3 can return to a slidable state and withdraw from the second sliding hole to open the opening slot.

[0045] The specific structure of the one-way sliding locking mechanism is as follows: the one-way sliding locking mechanism includes a self-locking block 4, which is made of a hard material, preferably metal, and the self-locking block 4 is an integrated structure, which can ensure that it has a high structural strength and ensure the stability of the self-locking of the reinforcing beam 3 in the self-locking state. The self-locking block 4 is rotatably arranged in the reinforcing beam 3 through an installation shaft (the installation shaft is an axis structure arranged inside the reinforcing beam 3) (rotatable means that the self-locking block 4 can rotate around the installation shaft), and the axis of the installation shaft is perpendicular to the axis of the reinforcing beam 3. Based on the above structure, the utility model is also provided with an elastic device 5 on the self-locking block 4, and the elastic device 5 is used to apply a self-locking elastic force to the self-locking block 4 to rotate toward the right beam 2. In addition, the self-locking block 4 also has a self-locking end (the self-locking end is a part of the structure of the self-locking block 4), and a self-locking window is arranged on the reinforcing beam 3 corresponding to the self-locking end. When the reinforcing beam 3 is in the extended limit state, a first locking groove opposite to the self-locking window is arranged in the first sliding hole. When the reinforcing beam 3 slides, the self-locking end slides against the inner wall of the first sliding hole. When the reinforcing beam 3 slides to the extension limit state, the self-locking end can pop out and get stuck in the first locking groove under the elastic force of the elastic device 5. In this state, the reinforcing beam 3 will not be able to slide in the opposite direction.

[0046] In order to unlock the self-locking block 4, the utility model is also provided with an unlocking rod 6 on the self-locking block 4 for controlling the self-locking block 4 to overcome the self-locking elastic force for unlocking and rotation, and a left beam 1 sliding groove is provided on the left beam 1 for the unlocking rod 6 to extend and slide. By applying a force to the unlocking rod 6 to overcome the self-locking elastic force applied by the elastic device 5 to the self-locking block 4 and reverse it, the self-locking end can be disengaged from the first locking groove, and the reinforcing beam 3 can slide in the opposite direction.

[0047] As can be seen from the above, when the reinforcing beam 3 moves from the first sliding hole to the second sliding hole, the self-locking end can pass through the self-locking window and slide in contact with the inner wall of the first sliding hole. In order to ensure the smoothness of the sliding, the utility model optimizes the self-locking end as follows: the side of the self-locking end facing the right beam 2 is the front side, and the front side is an inclined surface inclined forward. Preferably, the angle between the front side and the inner wall of the first sliding hole (specifically the part where the self-locking end contacts the first sliding hole) is between 35° and 55°, and the optimal angle is 45°. In addition, the vertical projection of the mounting axis is located in front of the vertical projection of the inclined surface, which can further ensure the smoothness of the sliding of the self-locking block 4 in the first sliding hole.

[0048] The utility model provides an elastic device 5 on the self-locking block 4. The elastic device 5 can be a common spring or a coil spring. No matter which structure is adopted, it can apply an elastic force (self-locking elastic force) to the self-locking block 4 in a specific direction.

[0049] In a specific embodiment of the present invention, the elastic device 5 adopts a common spring structure. Specifically, the self-locking end has an extension portion extending in the direction away from the right beam 2. The extension portion can pass through the self-locking window and be stuck in the first locking groove. A mounting column 7 is provided on the upper side of the extension portion, and the elastic device 5 is installed on the mounting column 7. The elastic device is compressed and arranged between the upper side of the extension portion and the top surface of the reinforcing beam 3.

[0050] The reinforcing beam 3 can slide in the first sliding hole, and has a movement limit position forward (toward the right beam 2) and a movement limit position backward (reverse sliding). The utility model is provided with a first locking groove corresponding to the first movement limit position in the first sliding hole. When the reinforcing beam 3 is in the limit state of retraction, the utility model is provided with a second locking groove opposite to the self-locking window in the first sliding hole. Furthermore, a stopper 8 that can abut against the head end of the reinforcing beam 3 is provided in the second sliding hole. The utility model realizes locking of the forward sliding of the reinforcing beam 3 through the first locking groove and the stopper 8, and realizes locking of the backward sliding of the reinforcing beam 3 through the second locking groove.

[0051] In order to facilitate the sliding of the reinforcing beam 3 , the utility model further provides a push rod 9 on the reinforcing beam 3 for pushing the reinforcing beam 3 to slide in the first sliding hole. The push rod 9 can slide in the sliding groove of the left beam 1 .

[0052] As can be seen from the above, the utility model provides a novel forklift overhead guard structure. In the utility model, an open groove is provided on the overhead guard. Relative to the open groove, the overhead guard includes a left beam 1 and a right beam 2. The left beam 1 and the right beam 2 are arranged opposite to each other. A first sliding hole is provided from the left beam 1 toward the end surface of the right beam 2 and extending along the axis of the left beam 1, and a second sliding hole is provided from the right beam 2 toward the end surface of the left beam 1 and extending along the axis of the right beam 2; a reinforcing beam 3 is slidably provided in the first sliding hole, one end of the reinforcing beam 3 is located in the left beam 1, and a one-way sliding locking mechanism is provided thereon. The reinforcing beam 3 can slide freely toward the right beam 2 through the one-way sliding locking mechanism and can slide in the reverse direction by unlocking, and the other end of the reinforcing beam 3 can be slidably inserted into the second sliding hole to realize the rigid connection between the left beam 1 and the right beam 2.

[0053] The new forklift overhead guard structure provided by the utility model is suitable for hydrogen forklifts, and the fuel system of hydrogen forklifts, like batteries, also needs to be installed and disassembled, and also needs to be hoisted and replaced. However, the current forklift overhead guard structure also has defects (an opening slot is provided to avoid the hoisting rope, or bolts are used as a reinforcement structure, resulting in cumbersome and complicated operation when opening the opening slot), and the reinforcement structure provided at the opening slot cannot be quickly disassembled, which is not conducive to improving the replacement speed. The utility model aims to: while strengthening the strength of the opening slot structure, the position state of the reinforcement structure can be quickly changed, simplifying the opening of the opening slot reinforcement structure, thereby facilitating the replacement of batteries. Through the above-mentioned structural design, when the fuel system needs to be replaced, the utility model only needs to push the unlocking rod 6 to retreat the reinforcement beam 3 into one of the side beams. After the battery replacement is completed, the reinforcement beam 3 is pushed into the other side beam by the forward push rod 9 and self-locked, so as to achieve the purpose of strengthening the strength of the opening slot, without the need for tools, and is quick and convenient. The utility model can not only strengthen the strength of the opening groove of the roof guard, but also facilitate the taking and placing of the hydrogen fuel system or the battery, does not require additional tools, is simple and convenient to operate, and improves the replacement efficiency.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel forklift overhead guard structure, with an open slot provided on the overhead guard, characterized in that: Relative to the opening groove, the overhead guard frame comprises a left beam (1) and a right beam (2), the left beam and the right beam being arranged opposite to each other, a first sliding hole extending from the left beam toward the end surface of the right beam and along the axis of the left beam, and a second sliding hole extending from the right beam toward the end surface of the left beam and along the axis of the right beam; A reinforcing beam (3) is slidably arranged in the first sliding hole, one end of the reinforcing beam is located in the left beam and a one-way sliding locking mechanism is arranged on the reinforcing beam. The reinforcing beam can slide freely toward the right beam and can be unlocked and slid in the reverse direction through the one-way sliding locking mechanism. The other end of the reinforcing beam can be slidably inserted into the second sliding hole to realize a rigid connection between the left beam and the right beam.

2. The novel forklift overhead guard structure according to claim 1 is characterized in that: The one-way sliding locking mechanism comprises a self-locking block (4), which is rotatably arranged in the reinforcing beam via a mounting shaft, and the axis of the mounting shaft is perpendicular to the axis of the reinforcing beam; The self-locking block is also provided with an elastic device (5) for applying a self-locking elastic force to the self-locking block to rotate in the direction of the right beam; The self-locking block is provided with a self-locking end, a self-locking window is provided on the reinforcing beam corresponding to the self-locking end, and a first locking groove corresponding to the self-locking window is provided in the first sliding hole when the reinforcing beam is in the extended limit state; The self-locking block is also provided with an unlocking rod (6) for controlling the self-locking block to overcome the self-locking elastic force and perform unlocking rotation, and the left beam is provided with a left beam sliding groove for the unlocking rod to extend and slide.

3. The novel forklift overhead guard structure according to claim 2 is characterized in that: The side of the self-locking end facing the right beam is a front side surface, and the front side surface is an inclined surface inclined forward.

4. The novel forklift overhead guard structure according to claim 3 is characterized in that: The vertical projection of the installation axis is located in front of the vertical projection of the inclined surface.

5. The novel forklift overhead guard structure according to claim 3 is characterized in that: The self-locking end has an extension portion extending in a direction away from the right beam, and the extension portion can pass through the self-locking window and be stuck in the first locking groove.

6. The novel forklift overhead guard structure according to claim 5 is characterized in that: A mounting column (7) is arranged on the upper side surface of the extension portion, the elastic device is mounted on the mounting column, and the elastic device is compressed and arranged between the upper side surface of the extension portion and the top surface of the reinforcing beam.

7. The novel forklift overhead guard structure according to claim 6 is characterized in that: The elastic device is a spring.

8. The novel forklift overhead guard structure according to claim 2 is characterized in that: When the reinforcing beam is in a retracted limit state, a second locking groove opposite to the self-locking window is arranged in the first sliding hole.

9. The novel forklift overhead guard structure according to claim 1 is characterized in that: A stopper (8) is arranged in the second sliding hole and can abut against the head end of the reinforcing beam.

10. The novel forklift overhead guard structure according to claim 2 is characterized in that: A push rod (9) is also provided on the reinforcing beam for pushing the reinforcing beam to slide in the first sliding hole, and the push rod can slide in the left beam sliding groove.

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