CN218620200U

CN218620200U - Weighing fork structure with unbalance loading protection function

Info

Publication number: CN218620200U
Application number: CN202221715163.4U
Authority: CN
Inventors: 徐强; 邵云杰; 王跃明; 曹健斌; 盛华东; 盛才
Original assignee: Zhejiang Jinhua Winner Mechanical Co ltd
Current assignee: Zhejiang Jinhua Winner Mechanical Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2023-03-14
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses but not calculating the shortcoming that the goods focus skew leads to the goods to have the risk of dropping at the transport goods in-process to the fork truck that can weigh among the prior art, having provided a take unbalance loading protect function's fork structure of weighing, belong to fork truck technical field, including the fork hoisting frame, the fixed fork foot that is equipped with two perpendicular to fork hoisting frames on the fork hoisting frame, be equipped with fork foot apron on the fork foot, weighing sensor is installed respectively at the both ends of fork foot, is equipped with the controller on the fork hoisting frame, this controller and weighing sensor electric connection. The utility model discloses whether the detectable goods is located fork truck's gravity center, if the focus of goods on fork truck is not fork truck's gravity center, when the focus of goods and fork truck's focus deviation exceeded certain range, can the focus be unstable when then fork truck carried the goods, probably make the goods drop or the risk that fork truck turned over appears, the controller can stop fork truck's operation according to the calculated result to avoid dangerous emergence.

Description

Weighing fork structure with unbalance loading protection function

Technical Field

The utility model belongs to the technical field of fork truck, concretely relates to take unbalance loading protect function's fork structure of weighing.

Background

The effect of fork truck in the industry transport is lifted to light weight, for preventing fork truck surpasss fork truck's rated handling capacity in handling, prior art has appeared like the utility model of patent number CN201821996915.2, discloses an automatic horizontal weighing fork truck, and this utility model has set up the metering mechanism that weighs on fork truck, can measure the calculation to the weight of goods when fork truck carries the goods, prevents that the overweight phenomenon of goods from appearing, has improved the degree of safety when operating.

During the process of carrying goods by the forklift, the goods can shift on the forklift due to uneven road surface or unstable gravity center of the goods, when the gravity center of the goods shifts too much on the forklift, the risk that the goods fall off the forklift can occur, in the prior art, the goods can be judged only by naked eyes of an operator, when the gravity center of the goods shifts too much on the forklift, the risk that the goods fall off is high, and for the safety of operators and the safety of the goods, the problem needs to be solved.

Disclosure of Invention

The utility model discloses to but the fork truck of weighing among the prior art does not calculate the goods focus skew and leads to the goods to have the shortcoming of the risk that drops at the transport goods in-process, provided a take partial shipment protect function's fork structure of weighing.

The invention aims to be realized by the following technical scheme: the utility model provides a take fork structure of weighing of unbalance loading protect function, includes the fork hoisting frame, the fixed fork foot that is equipped with two perpendicular to fork hoisting frame on the fork hoisting frame, be equipped with fork foot apron on the fork foot, weighing sensor is installed respectively at the both ends of fork foot, is equipped with the controller on the fork hoisting frame, this controller and weighing sensor electric connection.

In the above scheme, weighing sensor is all installed at the both ends of every fork foot, through the weight that four weighing sensor detected, can calculate whether the goods on the fork truck is located fork truck's gravity center, if the focus of goods on fork truck is not fork truck's gravity center, when the focus of goods and fork truck's focus deviation exceeded certain range, then fork truck can the focus unstable when carrying the goods, possibly make the goods drop or the risk that fork truck turned over appears, the controller can stop fork truck's operation according to the calculated result, thereby avoid dangerous emergence.

Preferably, the controller is a PLC touch screen all-in-one machine. The PLC touch screen all-in-one machine integrates a touch screen and a PLC controller, is small in size and can be directly mounted on a forklift.

Preferably, a pressure transmitter is further arranged between the controller and the weighing sensor, and data of the weighing sensor is converted into data signals which can be identified by the controller through the pressure transmitter and then transmitted to the controller.

Preferably, the fork lifting frame is further provided with a laser range finder electrically connected with the controller, the lower end of the laser range finder is provided with a through hole, laser of the laser range finder penetrates through the fork lifting frame through the through hole and irradiates the ground right below the fork lifting frame to measure and calculate the lifting height of the fork, and when the unbalance loading of goods on the fork truck exceeds a certain range, the fork truck can be locked to continue to operate to ensure safety.

Preferably, the upper end face of the weighing sensor is slightly higher than the upper end face of the fork leg, and when the fork leg cover plate is installed on the fork leg, the lower end face of the fork leg cover plate is in full contact with the weighing sensor. The weighing sensor is not in direct contact with the goods, and the weighing sensor is protected.

Preferably, the fork leg is provided with a mounting groove for mounting the weighing sensor.

Preferably, the fork lifting frame is provided with an instrument mounting cavity for mounting the pressure transmitter and the laser range finder, and an instrument cover plate for covering the instrument mounting cavity is arranged outside the instrument mounting cavity.

Compared with the prior art, the invention has the following beneficial effects:

through the weight that four weighing sensor detected, can calculate whether the goods on the fork truck is located fork truck's gravity center, if the focus of goods on fork truck is not fork truck's gravity center, when the focus of goods and fork truck's focus deviation exceeded certain limit, then can the focus unstable when fork truck carried the goods, probably make the goods drop or the risk that fork truck turned over appears, the controller can stop fork truck's operation according to the calculated result to avoid dangerous emergence.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a schematic structural view of another view angle of the present invention;

FIG. 3 is an exploded view of the present invention;

FIG. 4 is a schematic view of the load weight distribution of the present embodiment;

FIG. 5 is a diagram of the detection and vertical setting interface on the controller.

The mark in the figure is: 1. a fork lift; 2. a fork leg; 3. a fork foot cover plate; 4. an instrument mounting cavity; 5. an instrument cover plate; 6. a pressure transmitter; 7. a laser range finder; 8. a controller; 9. mounting grooves; 10. a through hole; 11. and a weighing sensor.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings to which:

as shown in fig. 1 to 4, a fork structure of weighing of area unbalance loading protect function, including fork hoisting frame 1, is equipped with the instrument installation cavity 4 of indent on the fork hoisting frame 1, is equipped with pressure transmitter 6 and laser range finder 7 in the instrument installation cavity 4, and instrument installation cavity 4 is equipped with the instrument apron 5 that covers instrument installation cavity 4 outward. A controller 8 is hung on one side of the reverse instrument installation cavity 4 of the fork lifting frame 1, and the controller 8 is a PLC touch screen integrated machine. Two fork legs 2 perpendicular to the fork lifting frame 1 are fixedly arranged on the fork lifting frame 1, mounting grooves 9 are respectively formed in two ends of each fork leg 2, weighing sensors 11 are mounted in the mounting grooves 9, and detection signals of the four weighing sensors 11 are converted into data signals which can be recognized by the controller 8 through the pressure transmitter 6 and then transmitted to the controller 8; the laser range finder 7 is electrically connected with the controller 8. Through the weight that four weighing sensor 11 detected, can calculate whether the goods on the fork truck is located fork truck's gravity center, if the focus of goods on fork truck is not fork truck's gravity center, when the focus of goods and fork truck's focus deviation exceeded certain limit, then can the focus unstable when fork truck carried the goods, it is possible to make the goods drop or the risk that fork truck overturned appears, controller 8 can stop fork truck's operation according to the calculated result to avoid dangerous emergence.

Still be equipped with fork foot apron 3 on the above-mentioned fork foot 2, the up end of weighing sensor 11 is a little higher than the up end of fork foot 2, and when fork foot apron 3 was installed on fork foot 2, fork foot apron 3's lower terminal surface and weighing sensor 11 fully contacted. The load cell 11 is not in direct contact with the goods, protecting the load cell 11.

The goods is placed the utility model discloses during last, on two fork feet 2 were fallen to the weight of goods, the focus of goods is partial to one of them fork foot 2 or partial front end/rear end of fork foot 2, and the weight that detects on four weighing sensor 11 all can appear differently. The goods is in the utility model discloses in the time, four weighing sensor 11 are as shown in fig. 5, are L1, L2, R1, R2 respectively, detect pressure data and be QL1, QL2, QR1, QR2 respectively, then this goods is in the utility model discloses an on load focus is to fork hoisting frame 1 apart from C accessible calculation formula C = [ (QL 2+ QR 2) × A1+ (QL 1+ QR 1) × A2 ]/(QL 1+ QL2+ QR1+ QR 2) calculate and draw. In the formula, A1 is the distance between the stress points of the weighing sensors L2 and R2 and the fork lifting frame 1, and A2 is the distance between the stress points of the two weighing sensors 11 of the same fork leg 2.

The offset S of the center of gravity of the load of the cargo from the center line between the two prongs 2 can be calculated by the formula S = B/2- [ (B-B1) × QL2/2+ (B-B2) × QL1/2+ (B + B1) × QR2/2+ (B + B2) × QR1/2 ]/(QL 1+ QL2+ QL3+ QL 4), where:

b is the outer width between the two fork legs 2;

b1 is the distance between the stress points of the weighing sensors L2 and R2,

b2 is the distance between the stress points of the weighing sensors L1 and R1;

c is the distance from the actual load gravity center to the fork lifting frame 1;

and S is the distance of the actual load center deviating from the center line of the two fork legs 2.

According to the two calculation formulas, the larger the value of C is, the farther the center of gravity of the goods on the forklift is from the fork lifting frame 1 is, the weaker the lifting capacity of the forklift is, and the lighter the weight of the goods which can be lifted is judged by the system. The larger the S value is, the farther the center of gravity of the goods deviates from the center line of the two fork legs 2, and the more the goods are in risk of falling. Therefore, the laser range finder 7 is combined, when the forklift detects that the S value exceeds the safety preset value in the lifting or descending process, the controller 8 can lock the lifting/descending control signal of the forklift, and if the forklift is in a walking state, the forklift is also locked and cannot walk continuously, so that the safety of goods and personnel is ensured.

The relationship between the value C and the maximum load allowed to lift by the forklift, and the safety preset value allowed by the value S to offset load are shown in figure 5.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a take unbalance loading protect function's fork structure of weighing, includes the fork hoisting frame, fixed fork foot (2) that are equipped with two perpendicular to fork hoisting frame on the fork hoisting frame, its characterized in that, be equipped with fork foot apron (3) on fork foot (2), weighing sensor (11) are installed respectively at the both ends of fork foot (2), are equipped with controller (8) on the fork hoisting frame, this controller (8) and weighing sensor (11) electric connection.

2. The weighing fork structure with the offset load protection function as claimed in claim 1, wherein the controller (8) is a PLC touch screen all-in-one machine.

3. The weighing fork structure with the unbalance loading protection function according to claim 1, wherein a pressure transmitter (6) is further arranged between the controller (8) and the weighing sensor (11).

4. The weighing fork structure with the unbalance loading protection function according to claim 1, wherein a laser range finder (7) electrically connected with the controller (8) is further arranged on the fork lifting frame, a through hole (10) is formed in the lower end of the laser range finder (7), and laser of the laser range finder (7) penetrates through the fork lifting frame through the through hole (10) and irradiates the ground right below the fork lifting frame.

5. The weighing fork structure with the offset load protection function according to claim 1, wherein the upper end surface of the weighing sensor (11) is slightly higher than the upper end surface of the fork foot (2), and when the fork foot cover plate (3) is installed on the fork foot (2), the lower end surface of the fork foot cover plate (3) is in full contact with the weighing sensor (11).

6. The weighing fork structure with the unbalance loading protection function according to claim 1, wherein a mounting groove (9) for mounting a weighing sensor (11) is arranged on the fork leg (2).

7. The weighing fork structure with the unbalance loading protection function according to claim 1, wherein the fork lifting frame (1) is provided with an instrument mounting cavity (4) for mounting the pressure transmitter (6) and the laser range finder (7) which are concave inwards, and an instrument cover plate (5) for covering the instrument mounting cavity (4) is arranged outside the instrument mounting cavity (4).