Balancing weight limiting and fixing device for crane in running state and crane

Abstract

The invention discloses a counterweight block limiting and fixing device for a crane in a running state, which comprises a counterweight block fixing device, and the counterweight block fixing device comprises a supporting assembly, a left pressing assembly and a right pressing assembly; the supporting assembly is arranged on the cargo boom, the left pressing assembly and the right pressing assembly are connected into a whole through the supporting assembly, and the pressing load of the cargo boom is transmitted to the balance weight through the supporting assembly. According to the limiting and fixing device, the pressing assembly is additionally arranged in the vertical direction, the freedom degree of the balance weights in the vertical direction is limited, the function of fixing different numbers of balance weights can be achieved, and the requirement of a customer for safely and stably fixing the balance weights in the driving state and the requirement for rapid disassembly and assembly of the limiting and fixing device are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cranes, in particular to a balance weight limiting and fixing device for cranes in running state and a crane. BACKGROUND

[0002] In order to continuously meet the needs of users and save the auxiliary transportation cost of users during the lifting operation, under the requirement of the running load of the crane, the current small-tonnage crane product needs to carry the balance weight on the chassis frame according to the working condition requirement, and it is required that the balance weight can be stably and safely fixed on the chassis frame during running.

[0003] For this purpose, the prior art such as "a movable counterweight and support pad dual-purpose support and wheel crane", application number 202321604904.6. The adjustable height positioning pin is used to limit and install different numbers of movable counterweights on the counterweight base, and the safety of the movable counterweight positioning is ensured by the setting height of the positioning pin. The balance weight fixing device is mainly composed of a positioning block, a left support and a right support. The left support and the right support are respectively installed on the left and right sides of the chassis frame, and the upper surfaces of the supports are on the same plane. Two positioning blocks are respectively installed on the left support and the right support, and the distance and diameter of the two positioning blocks correspond to the positioning hole below the balance weight. In the running state, the balance weight is placed on the balance weight fixing device on the crane chassis frame, and the positioning blocks on both sides of the balance weight fixing device are embedded into the mounting hole at the bottom of the balance weight. The movement of the balance weight in the running state is limited by the positioning blocks on both sides of the balance weight fixing device. The gravity of the balance weight itself is used to restrict the vertical movement.

[0004] However, the prior art scheme can only ensure that the balance weight is stably fixed on the chassis frame when running on a flat road, and does not limit the vertical freedom. With the increase of vehicle speed and the bumpiness of the road, the balance weight will move in the height direction, causing the vehicle body to bear a large impact and possibly damaging the surface of the lifting arm. In severe cases, it may cause the balance weight to fall, which poses a safety hazard.

[0005] Therefore, it is necessary to develop a new type of balance weight limiting and fixing device to limit the vertical freedom of the balance weight. SUMMARY

[0006] The present application provides a balance weight limiting and fixing device for cranes in running state and a crane, which increases a pressing assembly in the vertical direction to limit the vertical freedom of the balance weight, and can realize the fixing function of different numbers of balance weights, meet the requirements of the customer for safely and stably fixing the balance weight in the running state, and meet the requirements of the limiting and fixing device itself for quick disassembly and assembly.

[0007] Technical solution: The application discloses a balance weight limiting and fixing device for a crane in a running state, which is characterized by comprising a balance weight fixing device, wherein the balance weight fixing device comprises a supporting assembly, a left pressing assembly and a right pressing assembly; the supporting assembly is arranged on a hoisting arm, and the supporting assembly connects the left pressing assembly and the right pressing assembly into an integral whole, so that the pressing load of the hoisting arm is transmitted to the balance weight through the supporting assembly.

[0008] The end of the supporting assembly is provided with a limiting structure, the limiting structure cooperates with the sliding shaft blocking assembly of the left pressing assembly and the right pressing assembly, and the axial limiting of the left pressing assembly and the right pressing assembly is realized.

[0009] The left pressing assembly and the right pressing assembly are the same in structure, the left pressing assembly comprises a supporting rod assembly, a limiting guide and a sliding shaft blocking assembly, and the sliding shaft blocking assembly is installed on the supporting rod assembly through the limiting guide.

[0010] The upper end of the supporting rod assembly is provided with an upper supporting hole, a lower supporting hole and a fixing hole, the left pressing assembly is installed on the supporting assembly through the upper supporting hole or the lower supporting hole, and the distance between the upper supporting hole and the lower supporting hole is used for matching the stacking height of the balance weights; and the fixing hole is used for installing the sliding shaft blocking assembly.

[0011] The sliding shaft blocking assembly is installed on the upper part of the supporting rod assembly, and the sliding shaft blocking assembly is provided with an upper limiting clamping groove, a lower limiting clamping groove and an installation groove; the upper limiting clamping groove and the lower limiting clamping groove are matched with the limiting structure of the supporting assembly respectively, so that the axial locking and limiting of the left pressing assembly and the right pressing assembly are realized, the installation groove is matched with the limiting guide, and the installation groove is used for the installation and fixing of the position of the sliding shaft blocking assembly.

[0012] The sliding shaft blocking assembly is provided with a locking device, the supporting rod assembly is provided with a locking clamping groove, and the locking device cooperates with the locking clamping groove to realize two states of unlocking and locking of the sliding shaft blocking assembly.

[0013] The hoisting arm is provided with a limiting piece, the left pressing assembly or the right pressing assembly is placed in the limiting piece to limit the rotation of the balance weight fixing device; the limiting piece is provided with an installation hole and a limiting groove, and the limiting piece is fixedly connected with the hoisting arm through the installation hole.

[0014] The left and right clamping components are assembled and placed in a tooling box. During installation: in the driving configuration, the counterweight is installed on the counterweight fixing device on the chassis frame; the boom is adjusted to a small angle, the support component is installed into the hole in the boom, and the limiting component is installed on the boom; then, the left and right clamping components are installed at both ends of the support component respectively. The upper or lower support hole of the strut assembly is selected according to the number of counterweights. If the upper support hole is selected, the sliding axle stop assembly is slid down to the lower position first, waiting... When installing onto the support assembly, push the upper limit slot of the sliding axle stop assembly into the limiting structure at the end of the support assembly, and adjust the locking device on the sliding axle stop assembly so that it is inserted into the locking slot on the strut assembly, thereby realizing the axial limiting function of the support assembly on the left and right clamping assemblies; wherein the left limiting assembly or the right clamping assembly is installed into the limiting groove of the limiting component to realize the rotation restriction of the entire counterweight fixing device; then the boom is adjusted to the lowest position to realize the vertical limiting and clamping effect of the counterweight fixing device on the counterweight.

[0015] During dismantling: the boom is adjusted to a small angle to release the counterweight fixing device from limiting the counterweight; the locking device on the sliding axle stop assembly is adjusted to release the locking limit of the strut assembly on the sliding axle stop assembly; the sliding axle stop assembly is pushed down or up out of the limiting structure at the end of the support assembly to release the axial limit of the support assembly on the left and right clamping assemblies; then the left and right clamping assemblies are removed from both ends of the support assembly and placed in the toolbox.

[0016] The present invention provides a crane characterized in that: a crane counterweight limiting and fixing device for crane travel is used in the traveling state.

[0017] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention restricts the vertical degree of freedom of the counterweight by adding a clamping component in the vertical direction, and can realize the function of fixing different numbers of counterweights. It solves the problem of fast and safe positioning and fixing of counterweights on the chassis frame in the driving state, while ensuring the quick assembly and disassembly of the device, meeting the customer's requirements for safe and stable fixing of counterweights in the driving state and the requirements for quick assembly and disassembly of the positioning and fixing device itself.

[0018] This invention can safely and stably fix the counterweight, eliminating safety risks and saving on accessory transportation costs; the number of counterweights can be adjusted, allowing users to choose according to their needs without adding extra tooling; it is lightweight and can be operated by one person with one hand, facilitating quick installation and disassembly in both driving and lifting operations. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of a counterweight fixing device in the prior art;

[0020] Figure 2 This is a schematic diagram of the vertical limiting device of the present invention. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the vertical limiting device of the present invention. Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the structure of the support component of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the left clamping assembly of the present invention;

[0024] Figure 6 This is a schematic diagram of the strut assembly of the present invention;

[0025] Figure 7 This is a schematic diagram of the sliding shaft stop assembly of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the limiting member of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure in the working state of the present invention;

[0028] In the diagram, 1 is the lifting boom; 2 is the counterweight; 3 is the counterweight fixing device; 4 is the chassis frame; 5 is the support assembly; 51 is the limiting structure; 6 is the left clamping assembly; 61 is the strut assembly; 611 is the upper support hole; 612 is the lower support hole; 613 is the fixing hole; 614 is the locking slot; 62 is the limiting guide; 63 is the sliding axle stop assembly; 631 is the upper limit slot; 632 is the lower limit slot; 633 is the mounting slot; 634 is the locking device; 7 is the right clamping assembly; 8 is the limiting component; 81 is the mounting hole; and 82 is the limiting slot. Detailed Implementation

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] The crane of this invention is a multi-action machine capable of vertically lifting and horizontally transporting heavy objects within a certain range. Main boom: The main structure on the crane used for lifting, also called a "lifting arm" or "telescopic boom". Counterweight: Installed at the rear of the turntable, mainly used to balance the overturning moment generated by the heavy object on the entire machine during lifting, keeping the overturning moment within a reasonable range.

[0031] like Figure 2The present invention provides a counterweight block limiting and fixing device for a crane in the traveling state, including a counterweight block fixing device 3. The counterweight block fixing device 3 includes a support component 5, a left clamping component 6 and a right clamping component 7. The support component 5 is disposed on the crane arm 1. The support component 5 connects the left clamping component 6 and the right clamping component 7 into a whole, and transmits the clamping load of the crane arm 1 to the counterweight block 2 through the support component 5.

[0032] like Figure 3 The existing solution can also weld the support component 5 onto the crane arm, which is also composed of the support component 5, the left clamping component 6, and the right clamping component 7.

[0033] like Figure 4 The end of the support component 5 is provided with a limiting structure 51. The limiting structure 51 cooperates with the sliding shaft stop component 63 of the left pressing component 6 and the right pressing component 7 to achieve axial limiting of the left pressing component 6 and the right pressing component 7.

[0034] like Figure 5 The left clamping assembly 6 and the right clamping assembly 7 have the same structure. The left clamping assembly 6 includes a support rod assembly 61, a limiting guide 62 and a sliding shaft stop assembly 63. The sliding shaft stop assembly 63 is installed on the support rod assembly 61 through the limiting guide 62.

[0035] like Figure 6 The upper end of the strut assembly 61 is provided with an upper support hole 611, a lower support hole 612 and a fixing hole 613. The left clamping assembly 6 is installed on the support assembly 5 through the upper support hole 611 or the lower support hole 612. The distance between the upper support hole 611 and the lower support hole 612 is used to match the stacking height of the number of counterweights 2. The fixing hole 613 is used to install the sliding shaft stop assembly 63.

[0036] like Figure 7 The sliding shaft stop assembly 63 is installed on the upper part of the support rod assembly 61. The sliding shaft stop assembly 63 is provided with an upper limit slot 631, a lower limit slot 632, and a mounting groove 633. The upper limit slot 631 and the lower limit slot 632 cooperate with the limiting structure 51 of the support assembly 5 to realize the axial locking and limiting of the left clamping assembly 6 and the right clamping assembly 7. The mounting groove 633 cooperates with the limiting guide 62 for the installation and fixing of the sliding shaft stop assembly 63. The structure of the mounting groove 633 is not limited and can be an oblong hole, a round hole, a segmented oblong hole, etc.

[0037] Furthermore, the support components 61 of the left clamping assembly 6 and the right clamping assembly 7 can also be designed with threaded connections or other types of distance fine-adjustment devices to achieve fine adjustments in the installation height and compensate for manufacturing errors. The sliding shaft stop assembly 63 is provided with a locking device 634, and the support rod assembly 61 is provided with a locking slot 614. The locking device 634, in conjunction with the locking slot 614, enables both unlocking and locking states of the sliding shaft stop assembly 63.

[0038] like Figure 8 For applications requiring a limiting function, the lifting arm 1 is equipped with a limiting component 8. The left clamping assembly 6 or the right clamping assembly 7 is placed within the limiting component 8 to restrict the rotation of the counterweight fixing device 3. The limiting component 8 has mounting holes 81 and limiting grooves 82, and is fixedly connected to the lifting arm 1 through the mounting holes 81. The mounting holes 81 are not limited to the two mounting holes shown in the figure; they can also be other fixed mounting structures. The limiting component 8 is equipped with a limiting groove structure 82.

[0039] The left clamping component 6 and the right clamping component 7 are assembled and placed in the tooling box.

[0040] During installation: In driving mode, install the counterweight 2 onto the counterweight fixing device 3 on the chassis frame 4; adjust the boom 1 to a small angle, install the support assembly 5 into the hole of the boom 1, and install the limiting member 8 onto the boom 1; then install the left clamping assembly 6 and the right clamping assembly 7 at both ends of the support assembly 5 respectively. Select the upper support hole 611 or the lower support hole 612 of the strut assembly 61 according to the number of counterweights 2. If the upper support hole 611 is selected, slide the sliding axle stop assembly 63 to the lower position first. When installing it onto the support assembly 5, slide the sliding axle stop assembly... The upper limit slot 631 of the 63 is pushed into the limiting structure 51 at the end of the support component 5, and the locking device 634 on the sliding shaft stop component 63 is adjusted so that it is inserted into the locking slot 614 on the strut component 61, thereby realizing the axial limiting function of the support component 5 on the left pressing component 6 and the right pressing component 7; wherein the left limiting component 6 or the right pressing component 7 is installed in the limiting groove 82 of the limiting component 8 to realize the rotation restriction of the counterweight fixing device 3 as a whole; then the boom 1 is adjusted to the lowest position to realize the vertical limiting and pressing effect of the counterweight fixing device 3 on the counterweight 2.

[0041] During dismantling: the boom 1 is adjusted to a small angle, and the counterweight fixing device 3 is released from the limiting constraint on the counterweight 2; the locking device 634 on the sliding axle stop assembly 63 is adjusted, the locking limit of the strut assembly 61 on the sliding axle stop assembly 63 is released, the sliding axle stop assembly 63 is pushed down or up out of the limiting structure 51 at the end of the support assembly 5, the axial limit of the support assembly 5 on the left clamping assembly 6 and the right clamping assembly 7 is released, and then the left clamping assembly 6 and the right clamping assembly 7 are removed from both ends of the support assembly 5 and placed in the toolbox.

[0042] The number of upper support holes 611, lower support holes 612, and fixing holes 613 on the strut assembly 61 of this invention is unlimited and can be adjusted according to the number of counterweights and installation space. The support assembly 5 can be integrated with the luffing hinge shaft 12, or the connection method can be changed, using welding or threaded connection to fix the corresponding support rod assembly 5 on both sides of the basic arm structure. The structure of the limiting member 8 is not limited, mainly providing the function of limiting the degree of rotational freedom. Its installation position can be arranged as needed on the side of the lifting arm or other positions, or the limiting member 8 can be omitted, and a square hole shaft can be used for limiting. Only one of the left clamping assembly 6 and the right clamping assembly 7 can be set in the limiting and fixing assembly, and other related installation structures can be retained on one side accordingly. The limiting structure 51 of the support assembly 5 is not limited to the form mentioned in the patent, and can also be fixed by baffles, threads, etc. Nuts, pins, retaining rings, etc. can be used to limit the axial movement of the left clamping assembly 6 and the right clamping assembly 7 in the support assembly 5 instead of the sliding shaft stop assembly 63.

[0043] This invention uses a clamping assembly to restrict the vertical movement of the counterweight under the weight of the crane boom; the counterweight limiting device utilizes the cooperation of structural features such as the shaft holes on the support assembly and the clamping assembly to achieve quick assembly and disassembly of the clamping assembly; the counterweight limiting device utilizes the number of support holes on the strut assembly to limit and fix different matching counterweight blocks, achieving rapid conversion; and the counterweight block limiting device is used to limit and fix the counterweight block.

[0044] This invention restricts the vertical degree of freedom of the counterweight by adding a clamping component in the vertical direction, and can achieve the function of fixing different numbers of counterweights. It solves the problem of fast and safe positioning and fixing of counterweights on the chassis frame while driving, and at the same time ensures the quick assembly and disassembly of the device, meeting the customer's requirements for safe and stable fixing of counterweights while driving and the requirements for quick assembly and disassembly of the positioning and fixing device itself.

Claims

1. A counterweight limiting and fixing device for a crane in motion, characterized in that: The system includes a counterweight fixing device (3), which includes a support assembly (5), a left clamping assembly (6), and a right clamping assembly (7). The support assembly (5) is mounted on the lifting arm (1) and connects the left clamping assembly (6) and the right clamping assembly (7) into a whole, so as to transfer the clamping load of the lifting arm (1) to the counterweight (2) through the support assembly (5).

2. The counterweight limiting and fixing device for a crane in motion as described in claim 1, characterized in that: The support component (5) is provided with a limiting structure (51) at its end. The limiting structure (51) cooperates with the sliding shaft stop assembly (63) of the left pressing component (6) and the right pressing component (7) to achieve axial limiting of the left pressing component (6) and the right pressing component (7).

3. The counterweight limiting and fixing device for a crane in motion as described in claim 1, characterized in that: The left clamping assembly (6) has the same structure as the right clamping assembly (7). The left clamping assembly (6) includes a strut assembly (61), a limiting guide (62), and a sliding shaft stop assembly (63). The sliding shaft stop assembly (63) is installed on the strut assembly (61) through the limiting guide (62).

4. The counterweight limiting and fixing device for a crane in motion as described in claim 3, characterized in that: The upper end of the strut assembly (61) is provided with an upper support hole (611), a lower support hole (612) and a fixing hole (613). The left clamping assembly (6) is installed on the support assembly (5) through the upper support hole (611) or the lower support hole (612). The distance between the upper support hole (611) and the lower support hole (612) is used to match the stacking height of the counterweights (2). The fixing hole (613) is used to install the sliding shaft stop assembly (63).

5. The counterweight limiting and fixing device for a crane in motion as described in claim 3, characterized in that: The sliding shaft stop assembly (63) is installed on the upper part of the support rod assembly (61). The sliding shaft stop assembly (63) is provided with an upper limit slot (631), a lower limit slot (632) and a mounting groove (633). The upper limit slot (631) and the lower limit slot (632) cooperate with the limiting structure (51) of the support assembly (5) to realize the axial locking limit of the left clamping assembly (6) and the right clamping assembly (7). The mounting groove (633) cooperates with the limiting guide (62) for the installation and fixing of the position of the sliding shaft stop assembly (63).

6. The counterweight limiting and fixing device for a crane in a traveling state according to claim 5, characterized in that: The sliding shaft stop assembly (63) is provided with a locking device (634), and the support rod assembly (61) is provided with a locking slot (614). The locking device (634) cooperates with the locking slot (614) to realize the two states of unlocking and locking of the sliding shaft stop assembly (63).

7. The counterweight limiting and fixing device for a crane in a traveling state according to claim 1, characterized in that: The lifting arm (1) is provided with a limiting member (8), and the left clamping component (6) or the right clamping component (7) is placed in the limiting member (8) to restrict the rotation of the counterweight fixing device (3); the limiting member (8) is provided with a mounting hole (81) and a limiting groove (82), and the limiting member (8) is fixedly connected to the lifting arm (1) through the mounting hole (81).

8. A crane, characterized in that: The counterweight limiting and fixing device for a crane in the traveling state as described in any one of claims 1-7.

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