Anti-tipping structure of a fork lift truck

Abstract

The present application relates to the technical field of fork truck, solve the problem that the fork truck in prior art is inclined or even overturned when the goods fork is lifted to pick up goods, and specifically disclose a kind of anti-overturning fork truck structure, comprising: chassis, portal assembly, drive assembly and auxiliary support assembly, in the lifting process of goods fork, first preset height is selected, when the height of goods fork reaches first preset height, support wheel folded in the side of front wheel is unfolded in front of front wheel by driving element, at this time, support wheel is in abutment with ground, cooperates with front wheel and simultaneously plays the role of front end support, and because support wheel is located in front of front wheel at this time, an additional support point is added in front end, eliminate the inclination of fork truck caused by the rising of gravity center due to the lifting of goods fork, increase the stability during the lifting of goods fork, and ensure the safety performance of operator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forklift structure, in particular to a kind of anti-tipping forklift structure. BACKGROUND

[0002] In order to realize the carrying of goods or other objects in a small range, generally, forklift is used instead of manual work, which can save labor cost and improve work efficiency to a great extent. However, the stacking height of goods is not necessarily kept at the same level, especially for the goods on the shelves, which are generally divided into many layers. In order to use the same forklift to take and place goods at different heights, the forks are usually set to be liftable, and the forks are lifted to take goods at different heights. However, since the forks generally bear heavy goods, the lifting of the forks greatly affects the center of gravity of the whole forklift. When the forks take goods and rise, the center of gravity moves upward, and since the forks are located at the front end of the forklift, the forklift may be tilted forward or even overturned. SUMMARY

[0003] The present application is made in consideration of the foregoing problems, and the purpose of the application is to provide an anti-tipping forklift structure, which can add a support point in front of the front wheels after the forks are lifted to a preset height, to prevent the forklift from tilting forward.

[0004] To achieve the above-mentioned purpose, the present application provides an anti-tipping forklift structure, which comprises:

[0005] a chassis;

[0006] a drive assembly, which comprises a front wheel arranged at the front end of the chassis and a rear wheel arranged at the rear end of the chassis;

[0007] a portal assembly, which comprises a portal and forks, the portal is arranged on the chassis, the forks are liftable arranged on the portal and located in front of the chassis, and the forks have a first preset height;

[0008] an auxiliary support assembly, which comprises a driving member and a support member, the support member has a first position where it is folded on one side of the front wheel and a second position where it is unfolded in front of the front wheel, when the support member is in the first position, the bottom surface of the support member is higher than the bottom surface of the front wheel, when the support member is in the second position, the bottom surface of the support member is equal to the bottom surface of the front wheel, and when the forks are lifted to the first preset height, the driving member drives the support member to move from the first position to the second position.

[0009] The anti-overturning forklift structure, the front end of the chassis is provided with support beams on both sides, the front end of the support beam is provided with a connecting plate, the front wheels are connected with the connecting plates on the support beams through rotating shafts, and the support members are arranged on the inner sides of the front wheels.

[0010] The anti-overturning forklift structure, the drive member comprises a first drive motor and a transmission mechanism, the transmission mechanism is movably fixed on the inner side of the connecting plate, and the first drive motor drives the two support members to be synchronously unfolded or folded through the transmission mechanism.

[0011] The anti-overturning forklift structure, the transmission mechanism comprises a connecting rod and two movable connecting members connected with both ends of the connecting rod, and the two support members are connected with the two movable connecting members.

[0012] The anti-overturning forklift structure, the movable connecting member comprises a support frame rotatably connected with the connecting plate at the upper end, a first rocker arm rotatably connected with the connecting plate at one end, and a second rocker arm connected with the middle part of the support frame and one end of the first rocker arm at both ends, the other end of the first rocker arm away from the connecting plate is provided with a positioning groove, the first positioning hole is arranged on the side wall of the positioning groove, the second rocker arm is provided with a second positioning hole, the end of the second rocker arm provided with the second positioning hole is arranged in the positioning groove, the first positioning hole is in communication with the second positioning hole, the connecting rod is inserted into the communication holes of the first positioning hole and the second positioning hole at both ends, the piston rod of the first drive motor is connected with the connecting rod at one end, and the support member is arranged at the lower end of the support frame.

[0013] The anti-overturning forklift structure, the support member is a support wheel.

[0014] The anti-overturning forklift structure, the drive assembly further comprises a second drive motor, and the second drive motor is connected with the rear wheel.

[0015] The anti-overturning forklift structure, the mast assembly further comprises an operating table, the operating table is arranged on the mast in a lifting manner, the front end of the operating table is provided with a transversely arranged guide rail, and the forks are movably arranged on the guide rail through a lifting mechanism.

[0016] The anti-overturning forklift structure, the lifting mechanism comprises a lifting oil cylinder, a connecting frame and a positioning frame, one end of the connecting frame is slidably connected with the guide rail, and the other end of the connecting frame is connected with the positioning frame; the lifting oil cylinder is arranged on the positioning frame and can drive the forks to move along the height direction of the positioning frame.

[0017] The anti-tipping forklift structure has the following beneficial effects:

[0018] The anti-tipping forklift structure has the following beneficial effects:

[0019] 1. When the forks are raised to the first preset height, the driving member drives the support wheel to move from the first position of being folded on one side of the front wheel to the second position of being unfolded in front of the front wheel, which is equivalent to adding a support point in front of the front wheel, so that the forklift can be prevented from tilting forward due to the upward movement of the center of gravity;

[0020] 2. When the forks are below the first preset height, the driving member can drive the support wheel to be folded on one side of the front wheel without affecting the normal operation of the front wheel;

[0021] 3. The operation platform is provided with a liftable guard plate, which can prevent falling objects from above and increase the safety of the operator. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is a schematic diagram of the overall structure of the present application;

[0023] Fig. 2 is a schematic diagram of the assembly structure of the auxiliary support assembly and the chassis of the present application;

[0024] Fig. 3 is a schematic diagram of the auxiliary support assembly structure of the present application;

[0025] In the figure: 100, chassis; 110, support beam; 120, connecting plate; 200, driving assembly; 210, front wheel; 220, rear wheel; 300, gantry assembly; 310, gantry; 320, fork; 330, operation platform; 331, guide rail; 341, lifting oil cylinder; 342, connecting frame; 343, positioning frame; 350, guard plate; 400, auxiliary support assembly; 410, driving member; 411, first driving motor; 412, connecting rod; 413, support frame; 414, first rocker arm; 415, second rocker arm; 420, support wheel. DETAILED DESCRIPTION

[0026] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in conjunction with the drawings, but the application is not limited to these embodiments.

[0027] As shown in Figs. 1-3 , an anti-tipping forklift structure comprises:

[0028] The chassis 100 provides a bottom support connection function.

[0029] The driving assembly 200 includes front wheels 210 arranged at the front end of the chassis 100 and rear wheels 220 arranged at the rear end of the chassis 100, in this embodiment, the rear wheels 220 are driving wheels, and the front wheels 210 are driven wheels, so that the forklift can be driven to move forward or backward as a whole.

[0030] The mast assembly 300 includes a mast 310 arranged on the chassis 100 and a fork 320 arranged on the mast 310 in a liftable manner and located in front of the chassis 100, and the fork 320 has a first preset height, and the lifting of the fork 320 can provide guarantee for the fork 320 to pick up goods of different heights, and the first preset height refers to the height at which the fork 320 is lifted to a certain height when picking up the maximum weight within its load range, which will cause the forklift to tilt forward or overturn, and this height is the first preset height.

[0031] The auxiliary support assembly 400 includes a driving member 410 and a support member, the support member has a first position in which the support member is folded on one side of the front wheel 210 and a second position in which the support member is unfolded in front of the front wheel 210, when the support member is in the first position, the bottom surface of the support member is higher than the bottom surface of the front wheel 210, and when the support member is in the second position, the bottom surface of the support member is equal to the bottom surface of the front wheel 210; when the fork 320 is lifted to the first preset height, the driving member 410 drives the support member to move from the first position to the second position, that is, when the support member is in the first position, the support member is folded on one side of the front wheel 210, and the support member does not contact the ground, at this time, the forklift runs normally through the front and rear wheels 220, and the support member does not provide resistance, and when the fork 320 moves beyond the first preset height, that is, there is a risk of tilting forward, the driving member 410 drives the support member to move forward to the second position, at this time, the bottom surface of the support member is equal to the bottom surface of the front wheel 210, and the support member and the front wheel 210 simultaneously play a supporting role, and since a support point is additionally arranged in front of the front wheel 210, the forklift as a whole is not prone to tilting forward, in this embodiment, the support member is arranged as a support wheel 420, which can also ensure the normal operation of the forklift when playing a supporting role, in this embodiment, a sensor can be arranged on the preset height of the mast 310, when the mast 310 reaches the preset lifting height, the sensor feeds back a signal to a controller, and the controller controls the driving member 410 to act.

[0032] The front end of the chassis 100 is symmetrically provided with two support beams 110, the front end of each support beam 110 is provided with a connecting plate 120, and the two front wheels 210 are respectively connected to the connecting plates 120 on the two support beams 110 through rotating shafts, and the two support members are respectively arranged on the inner sides of the two front wheels 210, and the use of the two front wheels 210 can ensure the stability of the front end of the forklift in the transverse direction.

[0033] The driving member 410 comprises a first driving motor 411 and a transmission mechanism movably fixed to the inner side of the connecting plate 120, the first driving motor 411 drives the two support members to be unfolded or folded synchronously through the transmission mechanism, the first driving motor 411 provides power for the support members, and the driving motor can also be replaced by a driving oil cylinder.

[0034] The transmission mechanism comprises a connecting rod 412 and two movable connecting members respectively connected to the two ends of the connecting rod 412, the two support members are respectively connected to the two movable connecting members, the connecting rod 412 drives the two movable connecting members to move, and the two movable connecting members respectively drive one support member to move in an unfolding or folding manner.

[0035] The movable connecting member comprises a support frame 413 rotatably connected to the connecting plate 120 at the upper end, a first rocker arm 414 rotatably connected to the connecting plate 120 at one end, and a second rocker arm 415 connected to the middle part of the support frame 413 and one end of the first rocker arm 414 at two ends, respectively, a positioning groove is arranged on the other end of the first rocker arm 414 away from the connecting plate 120, a first positioning hole is arranged on the side wall of the positioning groove, a second positioning hole is arranged on one end of the second rocker arm 415, the end of the second rocker arm 415 provided with the second positioning hole is arranged in the positioning groove, the first positioning hole and the second positioning hole are in communication, the two ends of the connecting rod 412 are respectively inserted into the communication holes of the two first positioning holes and the second positioning hole, one end of the piston rod of the first driving motor 411 is connected to the connecting rod 412, and the support member is arranged at the lower end of the support frame 413. In this embodiment, the first driving motor 411 drives the connecting rod 412 to move obliquely through the piston rod, since one end of the first rocker arm 414 is rotatably connected to the connecting plate 120, the other end of the first rocker arm 414 limits the upward or downward movement of the connecting rod 412, when the piston rod is elongated outward, when the connecting rod 412 moves upward, one end of the second rocker arm 415 connected to the connecting rod 412 moves upward, and the other end of the second rocker arm 415 drives the support frame 413 to move toward the side close to the connecting rod 412, so that the support member is folded on one side of the front wheel 210; when the piston rod is retracted, the connecting rod 412 moves downward, and the other end of the second rocker arm 415 drives the support frame 413 to move away from the connecting rod 412, and the support member is unfolded in front of the front wheel 210.

[0036] The driving assembly 200 further comprises a second driving motor connected to the rear wheel 220, so that the rear wheel 220 is a driving wheel and the front wheel 210 is a driven wheel.

[0037] The portal frame assembly 300 further comprises an operation platform 330, which is arranged on the portal frame 310 in a liftable manner, and the front end of the operation platform 330 is provided with a transversely arranged guide rail 331, and the forks 320 are movably arranged on the guide rail 331 through a lifting mechanism, that is, the forks 320 can move transversely on the guide rail 331 through the lifting mechanism, and the lifting of the operation platform 330 can drive the forks 320 to lift together, and the operation platform 330 can be used for standing operators and operating the forklift.

[0038] The lifting mechanism comprises a lifting oil cylinder 341, a connecting frame 342 and a positioning frame 343, one end of the connecting frame 342 is in sliding connection with the guide rail 331, the other end is in connection with the positioning frame 343, the lifting oil cylinder 341 is arranged on the positioning frame 343 and can drive the forks 320 to move in the height direction of the positioning frame 343, and the lifting oil cylinder 341 provides power for the separate lifting of the forks 320, and the lifting oil cylinder 341 can also be replaced by a lifting motor, which should not exceed the scope of the present application.

[0039] A liftable guard plate 350 is arranged above the operation platform 330, and the guard plate 350 can lift together with the operation platform 330, which is used to prevent falling objects from injuring the operators located on the operation platform 330, and the lifting of the operation platform 330 and the guard plate 350 can be driven in a motor or oil cylinder driven manner.

[0040] The present application provides a kind of anti-tipping forklift structure, in the lifting process of fork 320, select first preset height, when the height of fork 320 reaches first preset height, support wheel 420 that is retracted in the side of front wheel 210 is unfolded in the front of front wheel 210 by driving piece 410, at this time, support wheel 420 is in abutment with ground, and it is cooperated with front wheel 210 and simultaneously plays the role of front support, and because support wheel 420 is located in the front of front wheel 210 at this time, that is, an additional support point is located in the front end, eliminate the center of gravity rising caused by the lifting of fork 320 and lead to the front tilt of forklift, increase the stability during the lifting of fork 320, guarantee the safety performance of operator.

[0041] The technical solutions of the present application are described in detail above in combination with the drawings, and the described embodiments are used to help understand the idea of the present application. The specific embodiments described herein are only illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0042] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications will also change accordingly.

[0043] In addition, the descriptions such as "first", "second", "one", etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0044] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

Claims

1. A tipper structure for preventing overturning, characterized in that, The utility model relates to a forklift truck, which comprises a chassis, a driving assembly, a mast assembly and an auxiliary support assembly. The driving assembly comprises front wheels arranged at the front end of the chassis and rear wheels arranged at the rear end of the chassis. The mast assembly comprises a mast arranged on the chassis and a fork liftable arranged on the mast and located in front of the chassis, and the fork has a first preset height. The auxiliary support assembly comprises a driving member and a support member, the support member has a first position in which the support member is folded on one side of the front wheel and a second position in which the support member is unfolded in front of the front wheel, when the support member is in the first position, the bottom surface of the support member is higher than the bottom surface of the front wheel, and when the support member is in the second position, the bottom surface of the support member is equal to the bottom surface of the front wheel. When the fork is lifted to the first preset height, the driving member drives the support member to move from the first position to the second position. The first preset height refers to the height at which the fork is lifted to cause the forklift to incline or overturn when the fork forks the maximum weight in the load range. The front end of the chassis is symmetrically provided with support beams, the front end of each support beam is provided with a connecting plate, each front wheel is connected to the connecting plate of each support beam through a rotating shaft, and each support member is arranged on the inner side of each front wheel. The driving member comprises a first driving motor and a transmission mechanism, the transmission mechanism is movably fixed to the inner side of the connecting plate, and the first driving motor drives the two support members to be unfolded or folded synchronously through the transmission mechanism. The transmission mechanism comprises a connecting rod and two movable connecting members connected to the two ends of the connecting rod, and each support member is connected to each movable connecting member. The driving assembly further comprises a second driving motor connected to the rear wheel.

2. A tipper structure as claimed in claim 1, wherein, The movable connecting member comprises a support frame rotatably connected to the connecting plate at the upper end, a first rocker arm rotatably connected to the connecting plate at one end, and a second rocker arm connected to the middle part of the support frame and one end of the first rocker arm at the two ends, respectively.

3. A tipper structure as claimed in any one of claims 1-2, wherein, The other end of the first rocker arm away from the connecting plate is provided with a positioning groove, the side wall of the positioning groove is provided with a first positioning hole, one end of the second rocker arm is provided with a second positioning hole, the second rocker arm is arranged in the positioning groove at the end provided with the second positioning hole, the first positioning hole is in communication with the second positioning hole, the connecting rod is inserted into the communication holes of the first positioning hole and the second positioning hole at the two ends, respectively, one end of the piston rod of the first driving motor is connected to the connecting rod, and the support member is arranged at the lower end of the support frame.

4. A tipper structure as claimed in claim 1, wherein, The support member is a support wheel. The mast assembly further comprises an operating platform liftable arranged on the mast, and the front end of the operating platform is provided with a transversely arranged guide rail, and the fork is movably arranged on the guide rail through a lifting mechanism.

5. A tipper structure as claimed in claim 4 wherein, The lifting mechanism comprises a lifting oil cylinder, a connecting frame and a positioning frame, one end of the connecting frame is in sliding connection with the guide rail, and the other end is in connection with the positioning frame; the lifting oil cylinder is arranged on the positioning frame and can drive the forks to move in the height direction of the positioning frame.

6. A tipper structure as claimed in claim 4 wherein, A liftable guard plate is arranged directly above the operation table.

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