A crane counterweight combination identification system and working method thereof

Abstract

The present invention relates to a crane counterweight combination identification system and a working method thereof. The system includes a pallet counterweight and a top counterweight arranged above the pallet counterweight. The pallet counterweight includes a pallet counterweight block, a resistor circuit 1 pre-buried in the pallet counterweight block, and an upper contact point 1 arranged at the top of the pallet counterweight block. The resistor circuit 1 includes a resistor R1, a resistor R2, a resistor R3, a travel switch S1, and a travel switch S2. The resistor R1 is connected in series with the travel switch S1 to form a branch circuit 1. The resistor R2 is connected in series with the travel switch S2 to form a branch circuit 2. The branch circuit 1 and the branch circuit 2 are connected in parallel with the resistor R3. The top counterweight includes a top counterweight block, a resistor circuit 2 pre-buried in the top counterweight block, an upper contact point 2 arranged at the top of the top counterweight block, and a lower contact point 2 arranged at the bottom of the top counterweight block. The resistor circuit 2 includes a resistor R6. The present invention can solve the deficiencies in the prior art, does not require manual input operation, and improves the accuracy of counterweight identification and the safety of hoisting.

Description

Technical Field

[0001] The invention relates to the technical field of crane counterweights, and in particular to a crane counterweight combination identification system and a working method thereof. Background Art

[0002] In order to improve the stability of the vehicle body and enhance the lifting performance, the truck crane is equipped with a counterweight. There are two types of counterweight installation for truck cranes: fixed and movable. Fixed counterweights are mainly used for small-tonnage truck cranes. The counterweight module is a counterweight with an immutable weight and a fixed installation method. The other type is a movable counterweight, which is mainly used for large-tonnage truck cranes. It is a detachable counterweight that can be installed in different combinations as needed. Before lifting, the movable counterweight crane selects the corresponding combination of counterweights to be installed according to the needs. Before lifting, the installed counterweight combination parameters need to be manually input into the torque limiter. The torque limiter will call out the corresponding lifting performance table under the counterweight combination according to the current counterweight combination. However, the movable counterweight crane has the following shortcomings: 1. The manual input operation is cumbersome; 2. There is a possibility of misoperation in manual input, which poses a safety hazard; 3. When replacing a new counterweight combination, it is easy to forget to input the new counterweight combination parameters into the torque limiter. Summary of the invention

[0003] The object of the present invention is to provide a crane counterweight combination identification system, which can solve the deficiencies in the prior art, does not require manual input operations, and improves the accuracy of counterweight identification and hoisting safety.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A crane counterweight combination identification system comprises a pallet counterweight and a top counterweight arranged above the pallet counterweight.

[0006] The pallet counterweight includes a pallet counterweight block, a resistance circuit 1 embedded in the pallet counterweight block, and an upper contact point 1 arranged on the top of the pallet counterweight block; the resistance circuit 1 includes a resistor R1, a resistor R2, a resistor R3, a travel switch S1 and a travel switch S2; the resistor R1 is connected in series with the travel switch S1 to form a branch 1; the resistor R2 is connected in series with the travel switch S2 to form a branch 2; the branch 1 and the branch 2 are connected in parallel with the resistor R3.

[0007] The top counterweight includes a top counterweight block, a resistor circuit 2 embedded in the top counterweight block, an upper contact point 2 arranged at the top of the top counterweight block, and a lower contact point 2 arranged at the bottom of the top counterweight block; the resistor circuit 2 includes a resistor R6.

[0008] Furthermore, it also includes several movable counterweights; the movable counterweights include a movable counterweight block, three resistor circuits pre-buried in the movable counterweight block, three upper contact points arranged on the top of the movable counterweight block, and three lower contact points arranged on the bottom of the movable counterweight block.

[0009] Furthermore, a pair of supporting columns are provided on the top of the pallet counterweight block; a through hole 1 adapted to the supporting columns is provided on the top counterweight block; and a through hole 2 adapted to the supporting columns is provided on the movable counterweight block.

[0010] Furthermore, the upper contact point 1 includes an upper conductor 1 connected to the resistance circuit 1 and an upper spring sheet 1 arranged at the upper end of the upper conductor 1.

[0011] The upper contact point 2 includes an upper wire 2 connected to the resistor circuit 2 and an upper spring sheet 2 arranged at the upper end of the upper wire 2, and the lower contact point 2 includes a lower wire 2 connected to the resistor circuit 2 and a lower spring sheet 2 arranged at the lower end of the lower wire 2.

[0012] The upper contact point three includes an upper wire three connected to the resistor circuit three and an upper spring sheet three arranged at the upper end of the upper wire three, and the lower contact point three includes a lower wire three connected to the resistor circuit three and a lower spring sheet three arranged at the lower end of the lower wire three.

[0013] Furthermore, a boss one is provided on the top of the pallet counterweight block; a boss two is provided on the top of the top counterweight block, and a groove two is provided on the bottom; a boss three is provided on the top of the movable counterweight block, and a groove three is provided on the bottom; the upper contact point one extends upward in the pallet counterweight block to the top of the boss one; the upper contact point two extends upward in the top counterweight block to the top of the boss two, and the lower contact point two extends downward in the top counterweight block to the groove two; the upper contact point three extends upward in the movable counterweight block to the top of the boss three, and the lower contact point three extends downward in the movable counterweight block to the groove three.

[0014] Furthermore, a left hanging slot and a right hanging slot are respectively provided on the left and right sides of the pallet counterweight block; the left hanging slot is used to hang the left counterweight, and the right hanging slot is used to hang the right counterweight.

[0015] Furthermore, it also includes a resistance measuring unit, a data transmission unit, a torque limiter and a display; the output end of the resistance measuring unit is connected to the input end of the data transmission unit, the output end of the data transmission unit is connected to the input end of the torque limiter, and the output end of the torque limiter is connected to the input end of the display.

[0016] The present invention also relates to a working method of the above-mentioned crane counterweight combination identification system, which comprises the following steps:

[0017] (1) Counterweight assembly: Determine the number of movable counterweights and whether to hang left and right counterweights, and assemble the counterweights.

[0018] (2) Resistance value measurement: The resistance value of the assembled counterweight is measured using a resistance measuring unit, and the resistance value is sent to the torque limiter through a data transmission unit.

[0019] (3) Lifting performance matching and display: The torque limiter determines the current counterweight combination state based on the received resistance value information, calls out the lifting performance table corresponding to the counterweight combination state, and displays the lifting performance table on the display.

[0020] It can be seen from the above technical scheme that the present invention realizes automatic recognition of the counterweight combination of the crane, eliminating the tedious manual input. There is no need to re-enter the counterweight combination parameters every time the counterweight combination is changed, avoiding the situation of missing input, and there is no possibility of erroneous input, thereby improving the safety of lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure diagram of the counterweight combination identification system in the present invention is Figure 1 (including top counterweight, movable counterweight, tray counterweight, left counterweight and right counterweight);

[0022] Figure 2 The structure diagram of the counterweight combination identification system in the present invention is Figure 2 (including top counterweight, movable counterweight and pallet counterweight);

[0023] Figure 3 It is a top view of the pallet counterweight;

[0024] Figure 4 It is the main view of the pallet counterweight;

[0025] Figure 5 It is a top view of the top weight;

[0026] Figure 6 It is the front view of the top counterweight;

[0027] Figure 7 It is a top view of the movable counterweight;

[0028] Figure 8 It is the main view of the movable counterweight;

[0029] Fig. 9 It is a block diagram of the working principle of the present invention.

[0030] in:

[0031] 1. Pallet counterweight, 2. Top counterweight, 3. Movable counterweight, 4. Left counterweight, 5. Right counterweight, 6. Travel switch S1, 7. Travel switch S2, 8. Support column, 9. Upper contact point one, 10. Through hole one, 11. Upper contact point two, 12. Lower contact point two, 13. Upper contact point three, 14. Lower contact point four. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings:

[0033] like Figure 1 and Figure 2 A crane counterweight combination identification system shown includes a pallet counterweight 1 and a top counterweight 2 arranged above the pallet counterweight 1. The counterweight combination can be determined according to actual conditions. The pallet counterweight and the top counterweight are the most basic configurations. A number of movable counterweights can be arranged between the pallet counterweight and the top counterweight as required. The left counterweight and the right counterweight can also be hung on the left and right sides of the pallet counterweight as required. Except for the side counterweights, each of the remaining counterweights has a resistor, and the combination of the counterweights is determined by the combination of resistors. In addition to the resistor, the pallet counterweight also has a travel switch: when the side counterweight is installed, the travel switch is triggered, the travel switch is turned on, and the resistor embedded in the counterweight pallet is connected to determine whether the side counterweight is installed.

[0034] like Figure 3 and Figure 4 As shown, the pallet counterweight 1 includes a pallet counterweight, a resistor circuit 1 embedded in the pallet counterweight, and an upper contact point 1 arranged on the top of the pallet counterweight. The resistor circuit 1 includes a resistor R1, a resistor R2, a resistor R3, a travel switch S16, and a travel switch S27. The resistor R1 is connected in series with the travel switch S16 to form a branch 1. The resistor R2 is connected in series with the travel switch S27 to form a branch 2; the branch 1 and the branch 2 are connected in parallel with the resistor R3. A pair of support columns 8 are arranged on the top of the pallet counterweight. The upper contact point 19 includes an upper wire 1 connected to the resistor circuit 1 and an upper spring sheet 1 arranged at the upper end of the upper wire 1. A boss 1 is arranged on the top of the pallet counterweight; the upper contact point 19 extends upward in the pallet counterweight to the top of the boss 1. The left and right sides of the pallet counterweight are respectively provided with a left hanging groove and a right hanging groove; the left hanging groove is used to hang the left counterweight, and the right hanging groove is used to hang the right counterweight.

[0035] like Figure 5 and Figure 6As shown, the top counterweight 2 includes a top counterweight block, a resistor circuit 2 embedded in the top counterweight block, an upper contact point 2 11 arranged at the top of the top counterweight block, and a lower contact point 2 12 arranged at the bottom of the top counterweight block; the resistor circuit 2 includes a resistor R6. A via 10 adapted to the support column is provided on the top counterweight block. The upper contact point 2 11 includes an upper wire 2 connected to the resistor circuit 2 and an upper spring sheet 2 arranged at the upper end of the upper wire 2, and the lower contact point 2 12 includes a lower wire 2 connected to the resistor circuit 2 and a lower spring sheet 2 arranged at the lower end of the lower wire 2. A boss 2 is provided on the top of the top counterweight block, and a groove 2 is provided on the bottom; the upper contact point 2 extends upward to the top of the boss 2 in the top counterweight block, and the lower contact point 2 12 extends downward to the groove 2 in the top counterweight block;

[0036] like Figure 7 and Figure 8 As shown, the movable counterweight 3 includes a movable counterweight block, a resistor circuit 3 embedded in the movable counterweight block, an upper contact point 3 13 arranged at the top of the movable counterweight block, and a lower contact point 3 14 arranged at the bottom of the movable counterweight block. The movable counterweight block is provided with a through hole 2 adapted to the support column 8. The upper contact point 3 includes an upper wire 3 connected to the resistor circuit 3 and an upper spring sheet 3 arranged at the upper end of the upper wire 3, and the lower contact point 3 14 includes a lower wire 3 connected to the resistor circuit 3 and a lower spring sheet 3 arranged at the lower end of the lower wire 3. The movable counterweight block is provided with a boss 3 on the top and a groove 3 on the bottom; the upper contact point 3 extends upward to the top of the boss 3 in the movable counterweight block, and the lower contact point 3 14 extends downward to the groove 3 in the movable counterweight block.

[0037] like Fig. 9 As shown, the counterweight combination identification system also includes a resistance measuring unit, a data transmission unit, a torque limiter and a display; the output end of the resistance measuring unit is connected to the input end of the data transmission unit, the output end of the data transmission unit is connected to the input end of the torque limiter, and the output end of the torque limiter is connected to the input end of the display.

[0038] The present invention is based on the movable counterweight of the crane. The movable counterweight of the automobile crane generally includes a pallet counterweight and a movable counterweight block. The movable counterweight block has two types: a flat type placed directly on the pallet counterweight and a suspended type hung on both sides of the pallet. The suspended type can only be installed when the flat movable counterweight is fully loaded. The present invention adopts a method of pre-embedded resistors in the counterweight block. Counterweight blocks of different weights correspond to different resistance values, and counterweight blocks of the same weight are installed with resistors of the same resistance value. When the movable counterweight blocks are installed together, these resistors are connected in parallel or in series through the contact points between the two counterweights. When assembling different counterweight combinations, the measured resistance values ​​are different, and the current counterweight combination is automatically identified by the difference in resistance values. After the counterweights are assembled, the contact points between adjacent counterweights are in contact, so that the resistors in the adjacent counterweights are connected in parallel to form a loop. By setting a spring piece as a contact point between the two counterweights, the tolerance and sufficient contact of the surface can be guaranteed. The torque limiter can automatically identify the weight of the counterweight. The present invention realizes automatic recognition of the counterweight combination of the crane, eliminates the tedious manual input, does not need to re-enter the counterweight combination parameters every time the counterweight combination is changed, avoids the situation of missing input, and eliminates the possibility of erroneous input operation, thereby improving the safety of hoisting.

[0039] The resistance measurement unit is used to measure the total resistance value in the circuit under the current counterweight combination state, and then convert the resistance value into a digital signal and transmit it to the torque limiter through the data transmission unit. The torque limiter analyzes the current counterweight combination state based on the received information, and calls out the corresponding lifting performance table based on the analyzed counterweight combination state, and displays it on the display interface. At this point, the user can perform safe lifting according to the information displayed on the display.

[0040] The specific implementation process of the counterweight combination identification system of the present invention is as follows:

[0041] (1) Two travel switches S1 and S2, two resistors R1 and R2 corresponding to the weight of the suspended counterweight, and a resistor R3 corresponding to the weight of the pallet are embedded in the pallet counterweight of the pallet counterweight, and these three resistors and the two travel switches are connected in series. Two wires are led from both ends of the resistor R3 to the boss 1 on the upper surface of the pallet counterweight, and a spring is set at the upper end of each wire. The boss 1 is made of conductive material and is insulated from the pallet counterweight. Figure 1 and Figure 2 In the figure, W1 is the pallet weight.

[0042] (2) A resistor R6 corresponding to its weight is embedded in the top counterweight, and the two ends of the resistor R6 are connected to the convex platform 2 on the upper surface of the top counterweight through wires. Two wires are connected to the two ends of the resistor R6 to the groove 2 on the lower surface of the top counterweight. A spring is set at each end of the wire. The surface material of the groove 2 is made of conductive material and is insulated from the top counterweight. Figure 1 and Figure 2 In the figure, W2 is the top weight.

[0043] (3) A resistor corresponding to its weight is embedded in each of the movable counterweights between the top counterweight and the tray counterweight. The two ends of the resistor are first led to the boss three through two wires, and then to the groove three through another two wires. The surface material of the groove three is made of conductive material and is insulated from the movable counterweight. Figure 1 and Figure 2 In the figure, the movable counterweight blocks are WX1, WX2, ... from bottom to top, and the resistors embedded in the movable counterweight blocks WX1, WX2, ... are R4, R5, ..., RX, ... in sequence.

[0044] (4) During the counterweight assembly process, several movable counterweights are placed on the pallet counterweight in sequence, and the support columns on the pallet counterweight pass through the through holes 2 of each movable counterweight in sequence. The support columns and through holes 2 can be inserted into each other, so that the counterweights do not slide against each other. After the groove of the movable counterweight and the boss of the pallet counterweight contact each other, since both are made of conductive materials, the resistor of the movable counterweight and the resistor of the pallet counterweight will be connected to each other. The boss of the pallet counterweight is inserted into the groove of the lowest movable counterweight, and the lower contact point 3 of the lowest movable counterweight contacts the upper contact point 1 of the pallet counterweight, so that the resistor in the lowest movable counterweight is connected in parallel with the resistor in the pallet counterweight. Between adjacent movable counterweights, the boss of the lower movable counterweight is inserted into the groove of the upper movable counterweight, so that the upper contact point 3 of the lower movable counterweight is connected with the lower contact point 3 of the upper movable counterweight, thereby connecting the resistors of the two adjacent movable counterweights in parallel. After installing the movable counterweight, place the top counterweight above the topmost movable counterweight, and the support column passes through the through hole 1 of the top counterweight. The boss of the topmost movable counterweight is inserted into the groove of the top counterweight, and the upper contact point 3 of the topmost movable counterweight is connected to the lower contact point 2 of the top counterweight, so that the resistor R6 of the top counterweight is connected in parallel with the resistor in the topmost movable counterweight. If no movable counterweight is added, the top counterweight is directly placed on the tray counterweight, the boss of the tray counterweight is inserted into the groove of the top counterweight, and the upper contact point 1 is connected to the lower contact point 2, so that the resistor R6 of the top counterweight is connected in parallel with the resistor R3 of the tray counterweight.

[0045] (5) Installation of suspended counterweights. After the other counterweight modules are installed, a pair of suspension slots will be left on both sides of the counterweight combination. The rotating counterweight is placed along the suspension slots. When it is placed at the bottom, it will press on the travel switches S1 and S2, so that the travel switches S1 and S2 will be triggered. When S1 and S2 are connected, the resistors R1 and R2 will be connected to the entire resistance circuit. The intermediate counterweights and suspended counterweights can be increased or decreased as needed, thereby producing different counterweight combination states, corresponding to different resistance value states.

[0046] (6) After the required counterweight assembly is assembled, the counterweight is lifted, and the boss of the top counterweight is inserted into the groove of the turntable. The surface material in the turntable groove is made of conductive material and is insulated from the turntable body. The turntable groove is connected to the resistance measuring unit through a wire, so that the resistance loop in the counterweight assembly is connected to the resistance measuring unit.

[0047] (7) Resistance value measurement: The resistance value of the assembled counterweight is measured using a resistance measuring unit, and the resistance value is sent to the torque limiter through a data transmission unit.

[0048] (8) Lifting performance matching and display: the torque limiter determines the current counterweight combination state based on the received resistance value information, calls out the lifting performance table corresponding to the counterweight combination state, and displays the lifting performance table on the display.

[0049] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A crane counterweight combination identification system, characterized in that: It includes a pallet counterweight and a top counterweight disposed above the pallet counterweight; The pallet counterweight comprises a pallet counterweight block, a resistor circuit 1 embedded in the pallet counterweight block, and an upper contact point 1 arranged on the top of the pallet counterweight block; the resistor circuit 1 comprises a resistor R1, a resistor R2, a resistor R3, a travel switch S1, and a travel switch S2; the resistor R1 is connected in series with the travel switch S1 to form a branch 1; the resistor R2 is connected in series with the travel switch S2 to form a branch 2; the branch 1 and the branch 2 are connected in parallel with the resistor R3; The top counterweight includes a top counterweight block, a resistor circuit 2 embedded in the top counterweight block, an upper contact point 2 arranged at the top of the top counterweight block, and a lower contact point 2 arranged at the bottom of the top counterweight block; the resistor circuit 2 includes a resistor R6; It also includes a plurality of movable counterweights; the movable counterweights include a movable counterweight block, a resistor circuit three embedded in the movable counterweight block, an upper contact point three arranged on the top of the movable counterweight block, and a lower contact point three arranged on the bottom of the movable counterweight block; A left hanging slot and a right hanging slot are respectively provided on the left and right sides of the pallet counterweight block; the left hanging slot is used to hang the left counterweight, and the right hanging slot is used to hang the right counterweight.

2. A crane counterweight combination identification system according to claim 1, characterized in that: A pair of supporting columns are arranged on the top of the pallet counterweight block; a through hole 1 adapted to the supporting columns is opened on the top counterweight block; and a through hole 2 adapted to the supporting columns is opened on the movable counterweight block.

3. A crane counterweight combination identification system according to claim 1, characterized in that: The upper contact point 1 includes an upper wire 1 connected to a resistance circuit 1 and an upper spring sheet 1 arranged at the upper end of the upper wire 1; The upper contact point 2 includes an upper wire 2 connected to the resistor circuit 2 and an upper spring sheet 2 arranged at the upper end of the upper wire 2, and the lower contact point 2 includes a lower wire 2 connected to the resistor circuit 2 and a lower spring sheet 2 arranged at the lower end of the lower wire 2; The upper contact point three includes an upper wire three connected to the resistor circuit three and an upper spring sheet three arranged at the upper end of the upper wire three, and the lower contact point three includes a lower wire three connected to the resistor circuit three and a lower spring sheet three arranged at the lower end of the lower wire three.

4. A crane counterweight combination identification system according to claim 1, characterized in that: The top of the pallet counterweight block is provided with a boss one; the top of the top counterweight block is provided with a boss two, and the bottom is provided with a groove two; the top of the movable counterweight block is provided with a boss three, and the bottom is provided with a groove three; the upper contact point one extends upward to the top of the boss one in the pallet counterweight block; the upper contact point two extends upward to the top of the boss two in the top counterweight block, and the lower contact point two extends downward to the groove two in the top counterweight block; the upper contact point three extends upward to the top of the boss three in the movable counterweight block, and the lower contact point three extends downward to the groove three in the movable counterweight block.

5. A crane counterweight combination identification system according to claim 1, characterized in that: It also includes a resistance measuring unit, a data transmission unit, a torque limiter and a display; the output end of the resistance measuring unit is connected to the input end of the data transmission unit, the output end of the data transmission unit is connected to the input end of the torque limiter, and the output end of the torque limiter is connected to the input end of the display.

6. The working method of the crane counterweight combination identification system according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: (1) Counterweight assembly: Determine the number of movable counterweights and whether to hang left and right counterweights, and assemble the counterweights; (2) Resistance value measurement: The resistance value of the assembled counterweight is measured by a resistance measuring unit, and the resistance value is sent to the torque limiter through the data transmission unit; (3) Lifting performance matching and display: The torque limiter determines the current counterweight combination state based on the received resistance value information, calls out the lifting performance table corresponding to the counterweight combination state, and displays the lifting performance table on the display.

Images