An adjustable counterweight carriage and method of operation thereof

Abstract

The application discloses an adjustable counterweight bracket and a working method thereof, and comprises the following steps: the adjustable counterweight bracket comprises an adjusting assembly (2), the adjusting assembly (2) comprises a wedge block (4), a sliding block (5) and an adjusting bolt (6); an active counterweight block is fixed on the adjustable counterweight bracket; the adjusting bolt (6) in the adjustable counterweight bracket is screwed in or out, the wedge block (4) in the adjustable counterweight bracket moves transversely, the sliding block (5) in the adjustable counterweight bracket above the wedge block (4) moves up and down or moves in an oblique direction, the upper surface of the adjustable counterweight bracket moves in the up and down direction, and the adjustable counterweight bracket and the active counterweight block on the adjustable counterweight bracket are tightly attached.

Description

Technical Field

[0001] This invention relates to an adjustable counterweight bracket and its working method, belonging to the field of engineering machinery technology. Background Technology

[0002] With the increasing application of cranes, the overturning moment during operation also increases with the increase in crane operating height and lifting capacity, posing many potential dangers to lifting operations. Therefore, installing counterweights is an effective way to improve the lifting capacity of cranes.

[0003] Because a crane is a special type of vehicle, in order to minimize the weight borne by the rear axle during travel, the crane's counterweight is divided into two parts: a fixed counterweight and a movable counterweight. The movable counterweight is removed while the crane is in motion to reduce the weight borne by the rear axle, and then reinstalled before the crane is put into operation to improve its lifting performance.

[0004] In the past, installing movable counterweights required multiple trial installations by operators and assistance from ground workers. The positioning accuracy of the movable counterweight was poor throughout the assembly process, making it very time-consuming. Furthermore, the need for manual assistance posed significant safety hazards to ground workers. To address these shortcomings, a new counterweight bracket has been invented. During installation, the operator can use the positioning pin on the bracket as a reference to accurately locate the landing point of the movable counterweight, thus quickly completing the entire installation process.

[0005] However, because the lower surface of the movable counterweight is not flat and lacks any adjustment mechanism, and the upper surface of the counterweight bracket also lacks any adjustment structure, to ensure the flatness of the upper surface of the counterweight bracket, after the counterweight bracket is welded, the upper surface of the counterweight bracket that mates with the movable counterweight is machined for leveling. Therefore, the flatness of the mating area of ​​the upper surface of the counterweight bracket is relatively good, but slight manufacturing errors are still inevitable. Consequently, when the movable counterweight is placed on the counterweight bracket, there is a localized gap between the lower surface of the movable counterweight and the upper surface of the counterweight bracket. This causes the movable counterweight to be placed unstable, creating a safety hazard. At this point, it is necessary to weld pads of different thicknesses and sizes to the gap area on-site, based on the actual gap area and size, to ensure a tight fit between the movable counterweight and the counterweight bracket. This design and on-site operation affect manufacturing and debugging efficiency and cost.

[0006] When installing the movable counterweight before the crane starts working, first accurately place the counterweight bracket in the predetermined installation position. The installation position of the counterweight bracket is generally located on the upper plane of the frame in front of the vehicle's rotation center. Then, install the counterweight according to the positioning pin on the counterweight bracket.

[0007] Two counterweight positioning pins are welded to the upper surface of the counterweight bracket. Two corresponding circular blind holes are opened on the upper surface of the movable counterweight block at the corresponding positions to cooperate with the counterweight positioning pins, thereby achieving accurate and rapid positioning and placement of the counterweight.

[0008] In the existing design, the lower surface of the movable counterweight is not flat and lacks any adjustment mechanism. The upper surface of the counterweight bracket also lacks any adjustment structure. To ensure the flatness of the upper surface of the counterweight bracket, after welding, the upper surface of the bracket mating with the movable counterweight is machined for leveling. Therefore, the flatness of the mating area is relatively good, but slight manufacturing errors are unavoidable. Consequently, when the movable counterweight rests on the bracket, there is a localized gap between the lower surface of the movable counterweight and the upper surface of the bracket. This causes instability and creates safety hazards. In this case, it is necessary to weld shims of different thicknesses and sizes to the gap area on-site, based on the actual gap area and size, to ensure a tight fit between the movable counterweight and the bracket. This design and on-site handling affect manufacturing and debugging efficiency and cost. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an adjustable counterweight bracket and its working method.

[0010] To achieve the above objectives, the present invention provides a method for operating an adjustable counterweight bracket, comprising the following steps:

[0011] The adjustable counterweight bracket includes an adjustment assembly, which includes a wedge, a slider, and an adjustment bolt;

[0012] Secure the movable counterweight to the adjustable counterweight bracket;

[0013] Screwing in or out the adjusting bolt in the adjustable counterweight bracket causes the wedge block in the adjustable counterweight bracket to move laterally, which in turn causes the slider in the adjustable counterweight bracket located above the wedge block to move up and down or diagonally. This causes the upper surface of the adjustable counterweight bracket to move up and down, making the adjustable counterweight bracket and the movable counterweight block on the adjustable counterweight bracket fit tightly together.

[0014] Prior to this, when the adjusting bolt is screwed in or out to make the adjustable counterweight bracket and the movable counterweight block on the adjustable counterweight bracket fit tightly together, the anti-loosening screw in the adjustable counterweight bracket is screwed in or out. The anti-loosening screw is pressed against the wedge block, so that the adjusting bolt is locked and does not loosen.

[0015] An adjustable counterweight bracket includes a counterweight bracket body and an adjustment assembly, the adjustment assembly including a support, a wedge, a slider and an adjustment bolt;

[0016] The counterweight bracket body has a receiving groove for the adjusting component. The support is fixedly set in the receiving groove. The upper surface of the support has a sliding block tooth for the sliding block. The wedge is located in the support and below the sliding block. The adjusting bolt passes through the counterweight bracket body and the support and abuts against the wedge. The size of the wedge is smaller than the size of the sliding block tooth.

[0017] Preferably, the length of the slider teeth is greater than or equal to the length of the slider.

[0018] Preferably, the wedge length is less than the length of the slider tooth, or the wedge width is less than the width of the slider tooth.

[0019] Preferredly, it includes anti-loosening screws that pass through the counterweight bracket body and the support and abut against the wedge.

[0020] Preferredly, it includes an anti-loosening washer, and the anti-loosening screw passes through the anti-loosening washer, the counterweight bracket body, and the support abutting against the wedge.

[0021] Preferredly, including a positioning pin, the main body of the counterweight bracket is fixedly provided with a positioning pin for engaging the movable counterweight block.

[0022] The beneficial effects achieved by this invention are as follows:

[0023] This invention employs a counterweight bracket with an adjustment device. Based on the actual manufacturing conditions of the movable counterweight and the counterweight bracket of different vehicles, the gap problem caused by the gap is quickly solved by adjusting the component, so that the movable counterweight block and the adjustable counterweight bracket fit tightly. This avoids the need for on-site welding of pads and eliminates the machining process in the manufacturing process of the counterweight bracket, thereby improving manufacturing and debugging efficiency and reducing costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the adjustable counterweight bracket in this invention;

[0025] Figure 2 This is a cross-sectional view of the wedge and slider assembly in this invention.

[0026] The following are the meanings of the reference numerals in the attached diagram: 1. Counterweight bracket body; 2. Adjustment component; 3. Support; 4. Wedge block; 5. Slider; 6. Adjusting bolt; 7. Anti-loosening screw; 8. Anti-loosening washer; 9. Positioning pin. Detailed Implementation

[0027] The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and should not be used to limit the scope of protection of the present invention.

[0028] Because existing counterweights and counterweight brackets have localized gaps in their fit, on-site personnel need to weld pads of different thicknesses and sizes to the gap area based on the actual gap area and size, affecting manufacturing and debugging efficiency and cost. This invention designs an adjustable counterweight bracket. Based on the actual manufacturing conditions of different vehicles' movable counterweights and counterweight brackets, which cause gap problems in the fit, an adjustment mechanism quickly resolves the gap problem, ensuring a tight fit between the movable counterweight and the counterweight bracket. This avoids on-site welding of pads and eliminates machining processes during counterweight bracket manufacturing, improving manufacturing and debugging efficiency and reducing cost. These are the technical problems that this invention aims to solve.

[0029] This invention provides a method for operating an adjustable counterweight bracket, comprising the following steps:

[0030] The adjustable counterweight bracket includes an adjustment component 2, which includes a wedge 4, a slider 5, and an adjustment bolt 6.

[0031] Secure the movable counterweight to the adjustable counterweight bracket;

[0032] Screwing in or out the adjusting bolt 6 in the adjustable counterweight bracket causes the wedge block 4 in the adjustable counterweight bracket to move laterally, which in turn causes the slider 5 in the adjustable counterweight bracket located above the wedge block 4 to move up and down or diagonally. This causes the upper surface of the adjustable counterweight bracket to move up and down, making the adjustable counterweight bracket and the movable counterweight block on the adjustable counterweight bracket fit tightly together.

[0033] Furthermore, in this embodiment, when the adjusting bolt 6 is screwed in or out to make the adjustable counterweight bracket and the movable counterweight block on the adjustable counterweight bracket fit tightly together, the anti-loosening screw 7 in the adjustable counterweight bracket is screwed in or out. The anti-loosening screw 7 is pressed against the wedge block 4, so that the adjusting bolt 6 is locked and does not loosen.

[0034] An adjustable counterweight bracket includes a counterweight bracket body 1 and an adjustment component 2. The adjustment component 2 includes a support 3, a wedge 4, a slider 5, and an adjustment bolt 6.

[0035] The counterweight bracket body 1 has a receiving groove for the adjusting component 2. The support 3 is fixedly installed in the receiving groove. The upper surface of the support 3 has a sliding tooth for the sliding block 5. The wedge 4 is located in the support 3 and below the sliding block 5. The adjusting bolt 6 passes through the counterweight bracket body 1 and the support 3 and abuts against the wedge 4. The size of the wedge 4 is smaller than the size of the sliding tooth.

[0036] Furthermore, in this embodiment, the length of the slider teeth is greater than or equal to the length of slider 5.

[0037] Furthermore, in this embodiment, the length of the wedge 4 is less than the length of the slider tooth, or the width of the wedge 4 is less than the width of the slider tooth.

[0038] Furthermore, this embodiment includes an anti-loosening screw 7, which passes through the counterweight bracket body 1 and the support 3 and abuts against the wedge block 4.

[0039] Furthermore, this embodiment includes an anti-loosening washer 8, and an anti-loosening screw 7 passes through the anti-loosening washer 8, the counterweight bracket body 1, and the support 3 and abuts against the wedge block 4.

[0040] Furthermore, this embodiment includes a positioning pin 9, and the main body 1 of the counterweight bracket is fixedly provided with a positioning pin 9 for engaging the movable counterweight block.

[0041] The present invention relates to an adjustable counterweight bracket for a crane, specifically comprising a counterweight bracket body 1 and multiple adjusting components 2, the specific structure of which is as follows: Figure 1 As shown. When the movable counterweight is installed on this counterweight bracket, the multiple adjustment components 2 and the upper surface of the counterweight bracket body 1 serve as the mating support surfaces for the movable counterweight. When the movable counterweight is initially placed on the counterweight bracket, some support surfaces may not be in contact. At this time, by adjusting some adjustment components 2, the movable counterweight and the counterweight bracket can be made to fit tightly.

[0042] Adjustment component 2, as the adjustment device of the present invention, mainly includes a support 3, a wedge 4, a slider 5, an adjusting bolt 6, an anti-loosening screw 7, and an anti-loosening washer 8, the specific structure of which is as follows: Figure 2 As shown.

[0043] The working principle of the adjustment device is as follows: When the movable counterweight is initially installed on this counterweight bracket, the adjustment component acts as a support surface. There is a localized gap between the bottom surface of the movable counterweight and the adjustment component 2. By screwing in and out the adjustment bolt 6, the position of the wedge block 4 in the support 3 is adjusted. During the movement of the wedge block 4 in the support 3, it drives the slider 5 to move up and down within the support 3. The upper surface of the slider 5 is the contact surface with the bottom surface of the movable counterweight. When the adjustment bolt 6 is screwed in and out to ensure a tight fit between the upper surface of the slider 5 and the lower surface of the counterweight bracket, the anti-loosening screw 7 and anti-loosening washer 8 are screwed in. After tightening, the screwed-in area of ​​the support 3 undergoes slight elastic deformation, which locks the adjustment bolt 6 in place.

[0044] This invention employs a counterweight bracket with an adjustment device. Compared to the original non-adjustable counterweight bracket, it quickly resolves the gap problem caused by the actual manufacturing conditions of the movable counterweight and counterweight bracket in different vehicles through the adjustment mechanism. This ensures a tight fit between the movable counterweight and the counterweight bracket, avoids on-site welding of pads, and eliminates machining processes in the counterweight bracket manufacturing process, thereby improving manufacturing and debugging efficiency and reducing costs.

[0045] There are many models of adjusting bolts 6, anti-loosening screws and anti-loosening washers that can be used in the prior art. Those skilled in the art can select the appropriate model according to actual needs. This embodiment will not list them all.

[0046] The abbreviations and key terms in this invention are defined as follows:

[0047] Counterweight: A block-shaped structure that is attached to the rear of the crane during lifting operations to raise the crane's height.

[0048] The balance of the vehicle is to prevent the crane from tipping over during operation, and it is usually made of cast iron.

[0049] Fixed counterweight: A type of counterweight that is fixedly attached to the rear of the crane and is not removed when the crane is in operation or not.

[0050] Active counterweight: This is a type of counterweight that is installed at the rear of the crane when it is in operation to improve lifting performance, and is removed when the crane is not in operation to meet national regulations on axle load requirements when the vehicle is in motion.

[0051] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method of operating an adjustable counterweight carriage, comprising: The adjustable counterweight bracket includes: a counterweight bracket body (1) and several adjustment components (2) arranged at the edge of the counterweight bracket body (1) and intersecting on the axis. The adjustment components (2) include a support (3), a wedge (4), a slider (5) and an adjustment bolt (6). A receiving groove for the adjusting component (2) is opened on the main body (1) of the counterweight bracket. The support (3) is fixedly installed in the receiving groove. A slider tooth for the slider (5) is opened on the upper surface of the support (3). The wedge (4) is located in the support (3) and below the slider (5). The adjusting bolt (6) passes through the main body (1) of the counterweight bracket and the support (3) and abuts against the wedge (4). The size of the wedge (4) is smaller than the size of the slider tooth. The length of the slider tooth is greater than or equal to that of the slider. (5) Length; The length of the wedge (4) is less than the length of the slider tooth, or the width of the wedge (4) is less than the width of the slider tooth; The anti-loosening screw (7) passes through the anti-loosening washer (8), the counterweight bracket body (1) and the support (3) and abuts against the wedge (4); The counterweight bracket body (1) is fixedly provided with a positioning pin (9) for engaging the movable counterweight, and the upper surface of the adjusting component (2) and the counterweight bracket body (1) serves as a support surface that engages with the lower bottom surface of the movable counterweight; The working method includes the following steps: Secure the movable counterweight to the adjustable counterweight bracket; Screw in or out the adjusting bolt (6) in the adjustable counterweight bracket, and the wedge (4) in the adjustable counterweight bracket will move laterally, causing the slider (5) in the adjustable counterweight bracket located above the wedge (4) to move up and down or diagonally, and the upper surface of the adjustable counterweight bracket will move up and down, so that the adjustable counterweight bracket and the movable counterweight block on the adjustable counterweight bracket are tightly fitted together. Screw in or out the anti-loosening screw (7) in the adjustable counterweight bracket, with the anti-loosening screw (7) pressing against the wedge (4); After tightening, the screwed-in area of ​​the support (3) undergoes slight elastic deformation, which causes the adjusting bolt (6) to lock and not loosen.

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