Anti-collision electric protection device for overturning of forklift cab

Abstract

The utility model discloses an anti-collision electric protection device for overturning of a forklift cab. The anti-collision electric protection device comprises an upper overturning module and an anti-collision module. The upward overturning module comprises a first intermediate relay and an upward overturning oil way electromagnetic valve arranged on a cab overturning oil cylinder, and a normally-closed contact of the first intermediate relay is connected with the upward overturning oil way electromagnetic valve. The anti-collision module comprises a second intermediate relay and a multi-way valve oil inlet electromagnetic valve, and a normally-closed contact of the second intermediate relay is connected with the multi-way valve oil inlet electromagnetic valve. When the cab needs to be upturned, after the second intermediate relay is electrified, the power supply of the oil inlet electromagnetic valve of the multi-way valve of the cross-country forklift is cut off, the oil inlet path of the multi-way valve of the forklift is cut off, and the gantry of the forklift is in a locked state, so that the operation can effectively prevent the cab of the cross-country forklift from colliding with the gantry of the cross-country forklift to damage the forklift when the cab of the cross-country forklift overturns; the device is convenient and simple to operate and control and low in cost, and the production cost is reduced while the operation safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting, transporting and handling vehicles, in particular to an electrical protection device for preventing a forklift cab from turning over and collision. Background Art

[0002] Before the cab of an off-road forklift is installed with an anti-collision travel switch, when the mast of the off-road forklift is in the rearward tilt position, pressing the cab up-tilt switch will cause the cab to start to tilt up. When the up-tilt is almost completed, the front windshield of the cab will be broken by the mast; or after the cab is flipped up, operating the mast to tilt backward will cause the mast to damage the front windshield of the cab. Utility Model Content

[0003] In view of the above-mentioned defects or shortcomings, the purpose of the present invention is to provide a forklift cab rollover anti-collision electrical protection device.

[0004] In order to achieve the above objectives, the technical solution of the utility model is:

[0005] A forklift cab flip anti-collision electrical protection device comprises: an upper flip module and an anti-collision module, wherein the upper flip module and the anti-collision module are connected to a power supply;

[0006] The upward flip module includes: a first intermediate relay and an upward flip oil circuit solenoid valve provided on the cab flip oil cylinder, wherein the normally closed contact of the first intermediate relay is connected to the upward flip oil circuit solenoid valve;

[0007] The anti-collision module includes: a second intermediate relay and a multi-way valve oil inlet solenoid valve, wherein the normally closed contact of the second intermediate relay is connected to the multi-way valve oil inlet solenoid valve.

[0008] It also includes: an anti-collision travel switch, the input end of the anti-collision travel switch is connected to the positive pole of the power supply; the output end of the anti-collision travel switch is connected to the first intermediate relay and the second intermediate relay, and the output ends of the upturned oil circuit solenoid valve and the multi-way valve oil inlet solenoid valve are connected to the negative pole of the power supply to form a closed circuit.

[0009] The anti-collision travel switch is installed at the front end of the cab.

[0010] The upward oil circuit electromagnetic valve is connected with an upward switch.

[0011] The first intermediate relay and the second intermediate relay are of JD1914 model.

[0012] The power source is a battery.

[0013] The beneficial effects of the utility model are:

[0014] The utility model discloses an electrical protection device for forklift cab flipping and anti-collision. Since an upward flipping module and an anti-collision module are arranged on the forklift, the upward flipping oil circuit solenoid valve of the off-road forklift cab flipping cylinder is controlled by the normally closed contact of the first intermediate relay, and the normally closed contact of the second intermediate relay controls the multi-way valve oil inlet solenoid valve. When the door frame is in a rearward tilting position, the first intermediate relay is energized and the power supply of the upward flipping oil circuit solenoid valve is cut off, the upward flipping oil circuit of the cab flipping cylinder is disconnected, and the cab cannot be flipped up; when the cab needs to be flipped up, the second intermediate relay is energized and the power supply of the off-road forklift multi-way valve oil inlet solenoid valve is cut off, the forklift multi-way valve oil inlet circuit is disconnected, and the forklift door frame is in a locked state. This operation can effectively prevent the off-road forklift cab from colliding with the off-road forklift door frame when flipping, thereby damaging the forklift. The operation and control of the device are convenient, simple and low-cost, and can ensure operational safety while reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the forklift cab rollover anti-collision electrical protection device;

[0016] Figure 2 This is the electrical schematic diagram of the forklift cab rollover anti-collision electrical protection device;

[0017] Figure 3 It is the working principle of the anti-collision travel switch of the forklift cab flip anti-collision electrical protection device Figure 1 ;

[0018] Figure 4 It is the working principle of the anti-collision travel switch of the forklift cab flip anti-collision electrical protection device Figure 2 . DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0020] like Figure 1 、 2 As shown, the utility model provides a forklift cab flip anti-collision electrical protection device, comprising: an upper flip module and an anti-collision module, wherein the upper flip module and the anti-collision module are connected to a power supply 1;

[0021] The upward flip module includes: a first intermediate relay 4 and an upward flip oil circuit solenoid valve 6 provided on the cab flip cylinder, wherein the normally closed contact of the first intermediate relay 4 is connected to the upward flip oil circuit solenoid valve 6;

[0022] The anti-collision module includes: a second intermediate relay 5 and a multi-way valve oil inlet solenoid valve 7 , wherein the normally closed contact of the second intermediate relay 5 is connected to the multi-way valve oil inlet solenoid valve 7 .

[0023] The first intermediate relay 4 and the second intermediate relay 5 are of model JD1914.

[0024] Preferably, the present invention further includes: an anti-collision travel switch 3, the input end of which is connected to the positive electrode of the power supply 1; the output end of the anti-collision travel switch 3 is connected to the first intermediate relay 4 and the second intermediate relay 5; the output ends of the oil-turning solenoid valve 6 and the multi-way valve oil-inlet solenoid valve 7 are connected to the negative electrode of the power supply 1, forming a closed circuit; and the oil-turning solenoid valve 6 is connected to the turning-up switch 2. Exemplarily, the power supply 1 is a battery.

[0025] Among them, the anti-collision travel switch 3 is used to connect the coil power supply of the first intermediate relay and the second intermediate relay; the normally closed point of the first intermediate relay is used to disconnect the upward oil circuit solenoid valve of the off-road forklift cab tilting cylinder; the normally closed point of the second intermediate relay is used to disconnect the oil inlet solenoid valve of the off-road forklift multi-way valve; the upward switch 2 is connected to the upward oil circuit solenoid valve 6 of the off-road forklift cab tilting cylinder, and the upward switch 2 is used to connect the upward oil circuit solenoid valve 6 of the off-road forklift cab tilting cylinder.

[0026] During the specific implementation process, the input end of the anti-collision travel switch 3 is connected to the positive pole of the battery, and the output end of the anti-collision travel switch 3 is connected to the first intermediate relay 4 and the second intermediate relay 5; the normally closed contact of the first intermediate relay 4 is connected to the upward oil circuit solenoid valve 6 of the off-road forklift cab tilting cylinder; the normally closed contact of the second intermediate relay 5 is connected to the off-road forklift multi-way valve oil inlet solenoid valve 7; the upward flip switch 2 is connected to the upward oil circuit solenoid valve 6 of the off-road forklift cab tilting cylinder.

[0027] The working process of this utility model is:

[0028] The position where the anti-collision switch does not collide with the collision block on the mast is as follows: Figure 3 As shown: The position where the anti-collision switch collides with the collision block on the door frame is as follows: Figure 4 As shown; Figure 3 、 4As shown, when the mast of the off-road forklift is in the rearward tilting position, the up-turn switch 2 of the cab is pressed, and the cab starts to flip up. When the front windshield of the cab is close to the mast, the mast presses against the anti-collision travel switch 3, and the normally open point of the anti-collision travel switch is closed. The anti-collision travel switch 3 is closed, the first intermediate relay 4 and the second intermediate relay 5 are energized and attracted, and the normally closed contact of the first intermediate relay 4 is disconnected after the first intermediate relay 4 is energized. The up-turn oil circuit solenoid valve 6 of the off-road forklift cab flip cylinder loses power, the up-turn oil circuit of the cab flip cylinder is disconnected, the cab stops flipping, and the up-turn switch 2 is pressed. The off-road forklift cab will not flip, which can effectively prevent the off-road forklift cab from colliding with the mast.

[0029] When the cab is tilted upward, the anti-collision travel switch 3 closes, the second intermediate relay 5 is energized, and the off-road forklift's multi-way valve oil inlet solenoid valve 7 loses power. The normally closed contact of the second intermediate relay 5 opens, the power supply to the off-road forklift's multi-way valve oil inlet solenoid valve is cut off, and the off-road forklift's multi-way valve oil inlet oil circuit is disconnected. Even if the multi-way valve rearward tilt handle is operated, the mast will not tilt backward. This device is easy to control, simple, and low-cost, and can effectively prevent the off-road forklift's cab from colliding with the mast when tilting, thereby damaging the forklift.

[0030] For those skilled in the art, it is obvious that the above-mentioned specific examples are only preferred embodiments of the present invention. Therefore, any improvements and changes that may be made by those skilled in the art to certain parts of the present invention still reflect the principles of the present invention and still achieve the purpose of the present invention, and all fall within the scope of protection of the present invention.

Claims

1. A forklift cab rollover anti-collision electrical protection device, characterized in that: include: An upper flip module and an anti-collision module, wherein the upper flip module and the anti-collision module are connected to a power supply (1); The upward turning module comprises: a first intermediate relay (4) and an upward turning oil circuit electromagnetic valve (6) provided on the cab turning oil cylinder, wherein the normally closed contact of the first intermediate relay (4) is connected to the upward turning oil circuit electromagnetic valve (6); The anti-collision module comprises: a second intermediate relay (5) and a multi-way valve oil inlet electromagnetic valve (7), wherein the normally closed contact of the second intermediate relay (5) is connected to the multi-way valve oil inlet electromagnetic valve (7).

2. The forklift cab rollover anti-collision electrical protection device according to claim 1 is characterized in that: Also includes: An anti-collision travel switch (3) is provided, wherein the input end of the anti-collision travel switch (3) is connected to the positive electrode of a power supply (1); the output end of the anti-collision travel switch (3) is connected to a first intermediate relay (4) and a second intermediate relay (5); and the output ends of the upward oil circuit solenoid valve (6) and the multi-way valve oil inlet solenoid valve (7) are connected to the negative electrode of the power supply (1), forming a closed circuit.

3. The forklift cab rollover anti-collision electrical protection device according to claim 2, characterized in that: The anti-collision travel switch (3) is installed at the front end of the cab.

4. The forklift cab rollover anti-collision electrical protection device according to claim 1 or 2, characterized in that: The upward oil circuit electromagnetic valve (6) is connected to an upward switch (2).

5. The forklift cab rollover anti-collision electrical protection device according to claim 1 or 2, characterized in that: The first intermediate relay (4) and the second intermediate relay (5) are of model JD1914.

6. The forklift cab rollover anti-collision electrical protection device according to claim 1, characterized in that: The power source (1) is a battery.

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