Crane chassis capable of improving rear stability

Abstract

The utility model relates to a crane chassis capable of improving rear stability. The crane chassis comprises a frame and two fixed supporting leg boxes arranged at the front end of the frame, a counter weight is arranged on the front side of each fixed supporting leg box; the counter weight is mounted on the frame through a counter weight bracket; the counter weight comprises a counter weight main body and a lifting lug arranged on the side wall of the counter weight main body; the balance weight support comprises a supporting seat and two baffles arranged on the front side and the rear side of the supporting seat respectively. The utility model aims to provide the crane chassis capable of improving the rear stability, and aims to effectively improve the stability of the crane chassis when executing a rear hoisting task on the premise of not sacrificing other key performances.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a crane chassis capable of improving rear stability. Background Art

[0002] Existing small-tonnage cranes are more effective at lifting from the side than from the rear, with rear-facing performance determining the crane's overall lifting performance. While cranes perform well at lifting from the side, their maximum load capacity is limited by insufficient stability when performing rear-facing lifts. Traditionally, this problem has been addressed by lengthening the rear overhang, improving rear stability. However, this increases manufacturing costs, is expensive, and reduces the chassis departure angle, impacting maneuverability and sacrificing some off-road performance. Utility Model Content

[0003] In order to address the deficiencies in the prior art, the purpose of the present invention is to provide a crane chassis that can improve rear stability, aiming to effectively improve the stability of the crane chassis when performing rear lifting tasks without sacrificing other key performances.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A crane chassis capable of improving rear stability, the crane chassis comprising a vehicle frame and two fixed outrigger boxes mounted at the front end of the frame; a counterweight is provided on the front side of each fixed outrigger box; the counterweight is mounted on the vehicle frame via a counterweight bracket; the counterweight comprises a counterweight body and lifting ears provided on the side walls of the counterweight body; the counterweight bracket comprises a support seat and two baffles respectively provided on the front and rear sides of the support seat.

[0006] Furthermore, the support seat includes a first support part and a second support part arranged in parallel, a third support part arranged above the front end of the first support part and the front end of the second support part, and a fourth support part arranged above the rear end of the first support part and the rear end of the second support part.

[0007] Furthermore, a cab is installed on the crane chassis; a groove is provided on the top of the cab.

[0008] Furthermore, the frame adopts an integrated frame structure.

[0009] Furthermore, a first counterweight mounting hole is provided at the bottom of the counterweight body.

[0010] Furthermore, a second counterweight mounting hole is provided on the third support portion and the fourth support portion; the first counterweight mounting hole and the second counterweight mounting hole are correspondingly arranged for fixing the counterweight on the counterweight bracket; the counterweight is fixed to the counterweight bracket by bolts and washers.

[0011] Furthermore, the first supporting portion, the second supporting portion, the third supporting portion and the fourth supporting portion are all L-shaped plates; the L-shaped plates are angle steel or angle iron.

[0012] Furthermore, the counterweight bracket is welded between the vehicle frame and the fixed leg box, one side of the counterweight bracket is welded to the fixed leg box, and the other side is welded to the longitudinal beam of the vehicle frame.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) The crane chassis described in the present invention improves the rear lifting performance of the entire vehicle and reduces the rear axle load and rear axle cost. By adding a counterweight in front of the fixed leg box in front of the frame, the weight distribution of the entire vehicle can be effectively balanced, especially when the crane is performing rear lifting, which increases the stability of the rear of the crane. The design of the counterweight reduces the load borne by the rear axle of the crane, reduces the requirements for the strength of the rear axle, and reduces the design complexity and material cost of the rear axle. Due to the improvement in the load-bearing capacity of the rear axle, lighter rear axle components can be used without sacrificing safety, further reducing manufacturing costs.

[0015] (2) The crane chassis described in the present invention can reduce the cost of the frame, shorten the assembly cycle of the sub-frame, and improve assembly efficiency. By adopting an integrated main and sub-frame structure, the overall design of the frame is simplified, the additional connectors and fasteners required for the traditional separate frame are reduced, and the material cost is reduced. In addition, the integrated frame reduces the number of steps in the assembly process, shortens the assembly time, and improves the efficiency of the production line. Since the installation of the sub-frame is reduced, the rigidity of the overall frame is enhanced, deformation is reduced, the service life of the frame is extended, and maintenance costs are further reduced.

[0016] (3) The crane chassis described in the present invention can reduce the height of the entire machine and increase the passability of the entire machine. By adopting a cab design with a concave roof structure, the height of the entire machine is effectively reduced, reducing the restrictions on the vehicle when operating in low spaces. The lower overall height of the machine not only improves the passability of the vehicle in restricted areas (such as tunnels and under bridges), but also improves the safety and convenience of operation. The design of the concave roof cab also helps to optimize the driver's field of view and improve the comfort and safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the structure of the crane chassis that can improve rear stability in the utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the structure of the crane chassis that can improve rear stability in the utility model. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the assembly structure of the counterweight, counterweight bracket, fixed leg box and frame in the utility model;

[0020] Figure 4 It is a structural diagram of the counterweight in the utility model;

[0021] Figure 5 It is a structural diagram of the counterweight bracket in the utility model.

[0022] in:

[0023] 1. Frame, 2. Counterweight, 3. Cab, 4. Counterweight bracket, 5. Fixed outrigger box, 6. Longitudinal beam, 7. Counterweight body, 8. Lifting lug, 9. First counterweight mounting hole, 10. First support part, 11. Second support part, 12. Third support part, 13. Fourth support part, 14. Baffle, 15. Second counterweight mounting hole, 16. Bolt, 17. Washer. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figure 1 and Figure 2 A crane chassis designed to improve rear-end stability is shown. The chassis comprises a frame 1 and two fixed outrigger boxes 5 mounted at the front of the frame 1. Each fixed outrigger box 5 is equipped with a counterweight 2 in front of the frame 1. The counterweights 2, one on each side, are located in front of the fixed outrigger boxes 5 in front of the frame 1. These counterweights improve rear-end stability and balance rear axle loads. They effectively increase the weight of the front section, balancing the vehicle's center of gravity for greater stability during rear-end loads and reducing the risk of rollover. By optimizing weight distribution, the crane can handle greater loads when performing rear-end loads, improving overall lifting capacity and operating efficiency. The counterweights reduce the axle load on the rear axle, lowering the required strength. This allows for the use of lighter rear axle components, reducing material costs.

[0026] like Figure 3As shown, the counterweight 2 is mounted on the vehicle frame 1 via a counterweight bracket 4. The counterweight 2 includes a counterweight body 7 and lifting lugs 8 located on the side walls of the counterweight body 7. The counterweight bracket 4 includes a support base and two baffles 14 located on the front and rear sides of the support base. The support base includes a first support portion 10 and a second support portion 11 arranged in parallel, a third support portion 12 located at the front end of the first support portion 10 and above the front end of the second support portion 11, and a fourth support portion 13 located at the rear end of the first support portion 10 and above the rear end of the second support portion 11. The counterweight 2 is the core component of the entire system, providing additional mass to balance or increase the stability of the equipment. The counterweight body 7 constitutes the actual mass of the counterweight. Lifting lugs 8 are located on the side walls of the counterweight body 7 to facilitate the use of lifting equipment (such as a crane) to move the counterweight. The counterweight bracket 4 is a frame structure used to secure the counterweight to the vehicle frame 1. The support base serves as the base support, directly connected to the vehicle frame, and provides a platform for the counterweight. Two baffles 14, located at the front and rear of the support base, restrict the counterweight's position and prevent it from accidentally sliding. The first and second support sections 10, 11, are arranged in parallel, forming the basic framework of the support base. The third and fourth support sections 12, 13 enhance the stability of the overall structure. By properly configuring the counterweight's position and size, the operational performance and safety of this type of equipment can be effectively improved.

[0027] Furthermore, a cab 3 is mounted on the crane chassis; a groove is provided on the top of the cab 3. The cab adopts a concave top design to reduce the height of the boom, thereby reducing the height of the entire machine and increasing the passability of the entire machine.

[0028] Furthermore, the vehicle frame 1 adopts a main-sub-integrated vehicle frame structure, which reduces the center of gravity of the vehicle frame, reduces deformation, reduces the installation of the main and sub-frames, and shortens the assembly cycle.

[0029] Furthermore, a first counterweight mounting hole 9 is defined at the bottom of the counterweight body 7. Second counterweight mounting holes 15 are defined on both the third support portion 12 and the fourth support portion 13. The first counterweight mounting hole 9 and the second counterweight mounting hole 15 are correspondingly positioned to secure the counterweight 2 to the counterweight bracket 4. The counterweight 2 is secured to the counterweight bracket 4 via bolts 16 and washers 17.

[0030] Furthermore, the first support portion 10, the second support portion 11, the third support portion 12 and the fourth support portion 13 are all made of L-shaped plates; the L-shaped plates are made of angle steel or angle iron. The L-shaped plate is a bent plate, and the baffle is a flat plate. The counterweight bracket is welded together by a bent plate and a flat plate. The bent plates on all sides have a limiting effect on the counterweight, ensuring that the counterweight does not move and remains stable during the driving of the vehicle, and avoiding damage to the mounting bolts due to excessive force. Through the above design, the rear lifting performance of the entire vehicle can be effectively improved, the rear axle load and cost can be reduced, the assembly cycle can be shortened, and the passability of the entire machine can be increased.

[0031] Furthermore, the counterweight bracket 4 is welded between the vehicle frame 1 and the fixed leg box 5 , with one side welded to the fixed leg box 5 and the other side welded to the longitudinal beam 6 of the vehicle frame 1 .

[0032] In summary, this utility model significantly improves the crane's rear-loading performance, reduces manufacturing and maintenance costs, and enhances overall vehicle trafficability and operational safety through its innovative structural design. These improvements not only enhance the product's market competitiveness but also provide users with greater economic benefits and a better user experience.

[0033] The above-described embodiments are merely descriptions of preferred implementation methods 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 fall within the scope of protection determined by the claims of the present invention.

Claims

1. A crane chassis capable of improving rear stability, characterized in that: The crane chassis comprises a vehicle frame (1) and two fixed leg boxes (5) mounted at the front end of the vehicle frame (1); a counterweight (2) is provided at the front side of each fixed leg box (5); the counterweight (2) is mounted on the vehicle frame (1) via a counterweight bracket (4); the counterweight (2) comprises a counterweight body (7) and a lifting lug (8) provided on a side wall of the counterweight body (7); the counterweight bracket (4) comprises a support seat and two baffles (14) respectively provided at the front and rear sides of the support seat.

2. The crane chassis capable of improving rear stability according to claim 1, characterized in that: The support seat comprises a first support portion (10) and a second support portion (11) arranged in parallel, a third support portion (12) arranged above the front end of the first support portion (10) and the front end of the second support portion (11), and a fourth support portion (13) arranged above the rear end of the first support portion (10) and the rear end of the second support portion (11).

3. The crane chassis capable of improving rear stability according to claim 1, characterized in that: A cab (3) is installed on the crane chassis; a groove is provided on the top of the cab (3).

4. The crane chassis capable of improving rear stability according to claim 1, characterized in that: The vehicle frame (1) adopts an integrated vehicle frame structure.

5. The crane chassis capable of improving rear stability according to claim 2, characterized in that: A first counterweight mounting hole (9) is provided at the bottom of the counterweight body (7).

6. The crane chassis capable of improving rear stability according to claim 5, characterized in that: A second counterweight mounting hole (15) is provided on each of the third supporting portion (12) and the fourth supporting portion (13); The first counterweight mounting hole (9) and the second counterweight mounting hole (15) are correspondingly arranged and used to fix the counterweight (2) on the counterweight bracket (4); The counterweight (2) is fixed to the counterweight bracket (4) via bolts (16) and washers (17).

7. The crane chassis capable of improving rear stability according to claim 2 or 6, characterized in that: The first support portion (10), the second support portion (11), the third support portion (12) and the fourth support portion (13) are all made of L-shaped plates; the L-shaped plates are made of angle steel or angle iron.

8. The crane chassis capable of improving rear stability according to claim 1, characterized in that: The counterweight bracket (4) is welded between the vehicle frame (1) and the fixed leg box (5), one side of the counterweight bracket (4) is welded to the fixed leg box (5), and the other side is welded to the longitudinal beam (6) of the vehicle frame (1).

Images