Frame of counterbalance forklift truck

Abstract

The invention provides a counterbalance forklift frame which comprises a frame body, the frame body comprises a left side structure assembly and a right side structure assembly, and the front end and the rear end of the left side structure assembly and the front end and the rear end of the right side structure assembly form a stable frame body structure through a rear tail frame and a plurality of transverse connecting plates in a surrounding mode; a first supporting assembly used for fixing an engine is arranged on the upper rear portion of the inner side of the frame body, and a second supporting assembly used for fixing a power battery is arranged on the lower middle portion of the inner side of the frame body. The space capable of containing the engine and arranging the power battery is formed in the frame body, the space utilization rate of the forklift frame is increased, and the forklift can carry the internal combustion engine and the power battery at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of forklifts, and in particular to a counterbalanced forklift frame. Background Art

[0002] Forklifts are industrial handling vehicles that are widely used in places with intensive cargo transfer, such as ports, warehouses, factories, logistics, and airports. They are indispensable equipment in current industrial transportation activities.

[0003] At present, most forklifts on the market are fuel forklifts. With their strong power and long endurance, fuel forklifts still occupy an important position in outdoor working environments. However, their high noise and high emissions not only pollute the environment, but also limit their use indoors or in places with high environmental requirements. With the advancement of national environmental protection policies and the development of new energy technologies, electric forklifts, with their zero emissions and low noise characteristics, help improve the working environment, reduce potential threats to employee health, and comply with increasingly stringent environmental regulations. However, electric forklifts have disadvantages such as weak power performance, short endurance and long charging time.

[0004] Since the frame structure of a forklift is compact, the existing forklift frame can only accommodate an engine or a power battery separately. Therefore, how to improve the existing compact forklift frame to meet the requirements of arranging the engine and the power battery at the same time is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0005] In order to solve the technical problems existing in the prior art, the present application provides a counterbalanced forklift frame, comprising: a frame body, the frame body comprising a left structural component and a right structural component, the front and rear ends of the left structural component and the right structural component are respectively surrounded by a rear tail frame and a plurality of transverse connecting plates to form a stable frame structure; a first support component for fixing the engine is provided at the upper rear inner side of the frame body, and a second support component for fixing the power battery is provided at the lower middle inner side of the frame body.

[0006] Furthermore, the first supporting assembly includes two bending plates I for connecting the front end of the engine, and two bending plates II for connecting the rear end of the engine, which are symmetrically arranged on the left and right sides of the frame body.

[0007] Furthermore, the fitting surfaces of the two bending plates II connected to the engine are both inclined inwards, providing an oblique upward supporting force for the engine.

[0008] Furthermore, the second support assembly includes a door and two support plates extending along the entry and exit direction of the door, and the door is detachably arranged on at least one of the left structural assembly and the right structural assembly.

[0009] Furthermore, the support plate includes a connection portion connected to the frame body and a support portion for supporting the power battery, and the support portion is provided with a connection hole connected to the power battery.

[0010] Furthermore, a positioning guide plate is provided on the inner side of one end of the support plate away from the hatch, and the positioning guide plate includes a guide portion along the axial direction of the support plate and a limiting portion perpendicular to the axial direction of the support plate, and the guide portion is a wedge-shaped structure that is narrow in front and wide in the back.

[0011] Furthermore, a hatch stop plate capable of being embedded in the inner side of the frame body to limit the hatch from moving outward is provided at the top of the hatch, and a connecting hole connected to the frame body is provided at the bottom of the hatch.

[0012] Furthermore, the left structural component and the right structural component both include a main beam, the front end of the main beam is connected to a drive seat weldment, the rear end is connected to a fuel tank and a fuel tank enclosure, and the outer side of the main beam is provided with an arc-shaped front wheel protection plate surrounding the drive seat weldment.

[0013] Furthermore, the rear tail frame includes a left main board of the seat frame and a right main board of the seat frame. The front ends of the left main board of the seat frame and the right main board of the seat frame are respectively connected to the left structural component and the right structural component, and the rear ends are surrounded by a counterweight mounting plate to form a frame structure.

[0014] Furthermore, the bottom of the counterweight mounting plate is connected to a rear axle mounting seat, a rear axle limiting plate and an additional weight block; the tops of the left main board of the seat frame and the right main board of the seat frame are respectively provided with radiator brackets for fixing the engine radiator.

[0015] Compared with the prior art, the beneficial effects of this application are: 1. The counterbalanced forklift frame of the present application improves the overall rigidity and stability of the forklift frame. It not only helps to reduce vibration, but also maintains better controllability and safety during heavy-load operations. A space is set inside the frame body to accommodate both the engine and the power battery, which improves the space utilization of the forklift frame and enables the forklift to carry both the internal combustion engine and the power battery at the same time.

[0016] 2. The mating surfaces of the first support assembly of the counterbalanced forklift frame of the present application and the engine are both inclined inward, providing an oblique upward support force for the engine. This helps to more firmly fix the engine in the frame, reduces the lateral movement of the engine caused by vibration or bumps during vehicle driving, and thus enhances the stability of the engine installation.

[0017] 3. The second support assembly of the counterbalanced forklift frame of the present application improves the stability and safety of the power battery, and through the detachable hatch and support plate structure, the installation and removal of the power battery are more convenient and accurate, greatly improving the efficiency of power battery replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the assembly structure of the counterbalanced forklift frame of the present application; Figure 2 This is a schematic diagram of the power battery installation structure of the counterbalanced forklift frame of the present application; Figure 3 This is a schematic diagram of the structure of the counterbalanced forklift frame of the present application; Figure 4 This is a schematic diagram of the structure of the counterbalanced forklift frame of the present application; Figure 5 It is a structural schematic diagram of the left structural components of this application; Figure 6 It is a schematic diagram of the structure of the right structural components of this application; Figure 7 This is a schematic diagram of the structure of the rear tailstock of the present application; Figure 8 This is a schematic diagram of the structure of the power battery of this application; Description of reference numerals: 1. First support assembly; 11. Bending plate I; 12. Bending plate II; 13. Rib plate; 2. Second support assembly; 21. Support plate; 22. Positioning guide plate; 23. Door; 231. Door stop plate; 3. Frame body; 31. Left structural assembly; 311. Left fuel tank; 3111. Left fuel tank panel; 312. Left drive seat welded parts; 313. Left main beam; 314. Left front wheel guard plate; 315. Left reinforcing rib; 32. Right structural assembly; 321. Right fuel tank; 3211. Right Fuel tank enclosure; 322, right drive seat weldment; 323, right main beam; 324, right front wheel guard plate; 325, right reinforcement rib; 33, rear tail frame; 331, left main board of the frame; 332, right main board of the frame; 333, rear axle mounting seat; 334, rear axle limit plate; 335, radiator bracket; 336, counterweight mounting plate; 337, additional weight block; 34, transverse connecting plate; 4, tilt cylinder support; 5, overhead guard support; 6, charging port bracket; 7, engine; 8, power battery; 9, fork. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] The present application is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect defined in this way can be combined with any other aspect or aspects, unless it is clearly stated that it cannot be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0021] In the description of the present application, it should be understood that the terms "inside", "outside", "up", "down", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present application.

[0022] refer to Figure 1 , Figure 2 As shown, the present application discloses a counterbalanced forklift frame, including: a frame body 3, including a left structural component 31 and a right structural component 32, the front and rear ends of the left structural component 31 and the right structural component 32 are respectively surrounded by a plurality of transverse connecting plates 34 and a rear tail frame 33 to form a stable frame structure, and a storage space for placing an engine 7 and a power battery 8 is provided inside the frame body 3. A first support assembly 1 for fixing the engine 7 is provided at the upper rear of the inner side of the frame body 3, and a second support assembly 2 for fixing the power battery 8 is provided at the middle and lower part of the inner side of the frame body 3. The frame body 3 of the frame structure of this embodiment improves the overall rigidity and stability of the forklift frame. It not only helps to reduce vibration, but also maintains better controllability and safety during heavy load operation. A space that can accommodate both the engine 7 and the power battery 8 is provided inside the frame body 3, which improves the space utilization of the forklift frame, so that the forklift can carry the engine 7 and the power battery 8 at the same time.

[0023] In some embodiments, the left structural component 31 and the right structural component 32 both include a main beam, the front end of the main beam is connected to a drive seat weldment, the rear end is connected to a fuel tank and a fuel tank enclosure, and an arc-shaped front wheel protection plate surrounding the drive seat weldment is provided on the outside of the main beam.

[0024] Specifically, the left structural assembly 31 includes a left main beam 313, and a left driving seat weldment 312 for supporting the axle is welded to the front end of the left main beam 313. A left fuel tank 311 is welded to the rear end of the left main beam 313. The left fuel tank 311 is a closed box for storing fuel. A left fuel tank enclosure 3111 is connected below the left fuel tank 311. There are many options for the specific connection between the left fuel tank 311 and the left fuel tank enclosure 3111, such as welding, bolt connection or integral molding. An opening is provided on the left fuel tank enclosure 3111, and a hatch 23 detachably connected to the left fuel tank enclosure 3111 is provided at the opening of the left fuel tank enclosure 3111. An arc-shaped left front wheel guard plate 314 surrounding the left driving seat weldment 312 is provided on the outside of the left main beam 313, and the left front wheel guard plate 314 is welded and connected to the left main beam 313 through a plurality of left reinforcing ribs 315.

[0025] The right structural assembly 32 includes a right main beam 323, a right driving seat welded part 322 for supporting the axle is welded to the front end of the right main beam 323, and a right oil tank 321 is connected to the rear end of the right main beam 323. The right oil tank 321 is a closed box for storing hydraulic oil, and a right oil tank enclosure 3211 is connected below. There are many options for the specific connection between the right oil tank 321 and the right oil tank enclosure 3211, such as welding, bolt connection or integral molding. The outer side of the right main beam 323 is provided with an arc-shaped right front wheel guard plate 324 surrounding the right driving seat welded part 322, and the right front wheel guard plate 324 is welded to the right main beam 323 through a plurality of right reinforcing ribs 325.

[0026] In some embodiments, the first support assembly 1 includes two bending plates Ⅰ11 symmetrically arranged on the frame body 3 for connecting the front end of the engine 7, and two bending plates Ⅱ12 for connecting the rear end of the engine 7. Among them, the two bending plates Ⅰ11 are welded to the inner sides of the left structural assembly 31 and the right structural assembly 32 respectively, and the two bending plates Ⅱ12 are welded to the rear tail frame 33. The bending plates Ⅱ12 are provided with vertically arranged ribs 13 to increase the structural strength of the bending plates Ⅱ12. The bending plates Ⅰ11 and Ⅱ12 are both provided with connection holes connected to the engine 7. The engine 7 is connected to the bending plates Ⅰ11 and Ⅱ12 by bolts, which can provide stable support for the engine 7.

[0027] Furthermore, the contact surfaces of the two bent plates II 12 connected to the engine 7 are both inclined inward, providing an oblique upward support force for the engine 7. This support force is not only perpendicular to the ground (providing basic support), but also includes an inward component. This inward component helps to fix the engine 7 more firmly in the frame, reducing the lateral movement of the engine 7 caused by vibration or bumps during the driving of the vehicle, thereby enhancing the stability of the installation of the engine 7.

[0028] In some embodiments, the second support assembly 2 includes a door 23 and two support plates 21 extending longitudinally along the door 23, and the door 23 is detachably arranged on at least one of the left structural assembly 31 and the right structural assembly 32. Preferably, the door 23 is arranged on the left fuel tank coaming 3111 of the left structural assembly 31, and at this time, the door 23, the support plate 21 and the right fuel tank coaming 3211 enclose a power battery compartment. The top of the door 23 is provided with a door stop plate 231 that can be embedded in the inner side of the left fuel tank coaming 3111 to limit the outward movement of the door 23, and the bottom of the door 23 is provided with a connection hole connected to the left fuel tank coaming 3111. The specific position of the connection hole can be set according to actual needs. If necessary, the connection hole at the bottom of the door 23 can also be set at the position connected to the support plate 21.

[0029] In addition, the support plate 21 is a T-shaped structure, including a connecting portion connected to the frame body 3 and a supporting portion for supporting the power battery 8. The connecting portion and the supporting portion are perpendicular to each other, and a connecting hole connected to the power battery 8 is provided on the supporting portion.

[0030] Furthermore, a positioning guide plate 22 is provided on the inner side of one end of the support plate 21 away from the hatch 23. The positioning guide plate 22 is L-shaped, including a guide portion along the axial direction of the support plate 21 and a limiting portion perpendicular to the axial direction of the support plate 21. The guide portion is a wedge-shaped structure that is narrow in front and wide in the back.

[0031] When installing the power battery, you first need to remove the hatch 23, and then use the fork 9 of the forklift equipment to lift the power battery 8 and push the power battery 8 into the channel between the two support plates 21. When the left and right sides of the power battery 8 encounter the positioning guide plate 22, the power battery 8 is adjusted to the left and right center under the action of the wedge-shaped guide part of the positioning guide plate 22; and under the action of the limiting part of the positioning guide plate 22, the power battery 8 is placed in the predetermined position. After the power battery enters the predetermined position, the fork 9 of the forklift equipment is lowered, so that the bottom of the left and right sides of the power battery 8 are respectively mounted on the two support plates 21, and the threaded holes at the bottom of the power battery 8 are aligned with the connection holes on the support part of the support plate 21, and then the power battery 8 is fixedly connected to the support plate 21 with bolts. Provide a stable fixed support for the power battery 8, and provide stability for the power battery 8. Finally, the top of the hatch 23 is engaged with the left fuel tank panel 3111, the hatch stopper plate 231 on the top of the hatch 23 and the hatch 23 are respectively against the inner and outer sides of the left fuel tank panel 3111, and then the bottom of the hatch 23 is fixed to the left fuel tank panel 3111 by bolts. The hatch 23 protects the power battery 8, not only preventing the power battery 8 from accidentally jumping out, but also preventing external forces from damaging the power battery 8, further improving the stability and safety of the power battery 8.

[0032] When disassembling the power battery, first remove the hatch 23 and unscrew the bolts fixing the power battery 8 and the support plate 21. Then use the fork 9 of the forklift equipment to lift the bottom of the power battery 8 a small height, and then exit the forklift to shovel out the power battery 8.

[0033] The second support assembly 2 of this embodiment can not only provide stable fixed support for the power battery 8, but also provide stability and safety for the power battery 8. Moreover, through the detachable hatch 23 and support plate 21 structure, the installation and removal of the power battery 8 are more convenient and accurate, which greatly improves the replacement efficiency of the power battery 8.

[0034] In some embodiments, the rear tail frame 33 includes a left main board 331 and a right main board 332. The front ends of the left main board 331 and the right main board 332 are respectively connected to the left structural component 31 and the right structural component 32, and the rear ends are surrounded by a counterweight mounting plate 336 to form a frame structure. The bottom of the counterweight mounting plate 336 is connected to a rear axle mounting seat 333, a rear axle limiting plate 334 and an additional weight block 337; the tops of the left main board 331 and the right main board 332 are respectively provided with radiator brackets 335 for fixing the engine radiator.

[0035] In some embodiments, a tilt cylinder support 4 , a roof guard support 5 and a charging port bracket 6 are also provided on the top of the frame body 3 .

[0036] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. A counterbalanced forklift frame, characterized in that: include: A vehicle frame body (3), the vehicle frame body (3) comprising a left structural component (31) and a right structural component (32), the front and rear ends of the left structural component (31) and the right structural component (32) being respectively surrounded by a rear tail frame (33) and a plurality of transverse connecting plates (34) to form a stable frame structure; a first support component (1) for fixing an engine (7) is provided at the upper rear side of the inner side of the vehicle frame body (3), and a second support component (2) for fixing a power battery (8) is provided at the lower middle side of the inner side of the vehicle frame body (3).

2. The counterbalanced forklift frame according to claim 1, characterized in that: The first support assembly (1) comprises two bending plates I (11) symmetrically arranged on the left and right sides of the frame body (3) for connecting to the front end of the engine (7), and two bending plates II (12) for connecting to the rear end of the engine (7).

3. The counterbalanced forklift frame according to claim 2, characterized in that: The contact surfaces of the two bent plates II (12) connected to the engine (7) are both inclined inwards, providing an oblique upward supporting force for the engine (7).

4. The counterbalanced forklift frame according to claim 1, characterized in that: The second support assembly (2) comprises a door (23) and two support plates (21) extending along the entry and exit direction of the door (23); the door (23) is detachably arranged on at least one of the left structural assembly (31) and the right structural assembly (32).

5. The counterbalanced forklift frame according to claim 4, characterized in that: The support plate (21) comprises a connection portion connected to the vehicle frame body (3) and a support portion used to support a power battery (8); the support portion is provided with a connection hole connected to the power battery (8).

6. The counterbalanced forklift frame according to claim 4, characterized in that: A positioning guide plate (22) is provided on the inner side of one end of the support plate 21 away from the hatch 23, the positioning guide plate (22) comprising a guide portion along the axial direction of the support plate 21 and a limit portion perpendicular to the axial direction of the support plate 21, the guide portion being a wedge-shaped structure that is narrow in front and wide in the back.

7. The counterbalanced forklift frame according to claim 4, characterized in that: The top of the hatch door (23) is provided with a hatch door stop plate (231) which can be embedded in the inner side of the vehicle frame body (3) to limit the outward movement of the hatch door (23), and the bottom of the hatch door (23) is provided with a connection hole connected to the vehicle frame body (3).

8. The counterbalanced forklift frame according to claim 1, characterized in that: The left structural component (31) and the right structural component (32) both comprise a main beam, the front end of the main beam being connected to a drive seat weldment, the rear end being connected to a fuel tank and a fuel tank enclosure, and the outer side of the main beam being provided with an arc-shaped front wheel protection plate surrounding the drive seat weldment.

9. The counterbalanced forklift frame according to claim 1, characterized in that: The rear tail frame (33) comprises a seat frame left main board (331) and a seat frame right main board (332), the front ends of the seat frame left main board (331) and the seat frame right main board (332) are respectively connected to the left structural component (31) and the right structural component (32), and the rear ends are surrounded by a counterweight mounting plate (336) to form a frame structure.

10. The counterbalanced forklift frame according to claim 9, characterized in that: The bottom of the counterweight mounting plate (336) is connected to a rear axle mounting seat (333), a rear axle limiting plate (334) and an additional weight block (337); the tops of the seat frame left main plate (331) and the seat frame right main plate (332) are respectively provided with radiator brackets (335) for fixing the engine radiator.

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