Multipurpose auxiliary trolley for crane

Abstract

The multipurpose auxiliary trolley comprises an auxiliary trolley body, the auxiliary trolley body is provided with a balance weight and auxiliary supporting legs, the auxiliary trolley body can be used for hanging the balance weight, after the auxiliary trolley body is fixedly connected with a main frame through a connecting mechanism, the auxiliary supporting legs of the auxiliary trolley body stretch out, and the span of the supporting legs of the whole crane is increased. According to the auxiliary trolley, the function of the auxiliary trolley is expanded, transportation and hanging connection of the balance weight can be achieved, the auxiliary trolley can be connected with the main frame, the span of the supporting legs is increased by arranging the corresponding supporting legs, and the auxiliary trolley can be hung to a boarding balance weight support to serve as the balance weight; and the purposes of reducing the operation cost of the crane and improving the performance of the crane are achieved.

Description

Technical Field

[0001] This invention relates to the field of cranes, and more particularly to a multi-purpose auxiliary trolley for cranes. Background Technology

[0002] As a type of special machinery that can travel on roads, wheeled cranes must meet relevant regulatory requirements regarding their own weight and individual axle load. Due to the heavy weight of wheeled cranes and their counterweights, in order to meet the regulatory restrictions on axle loads, it is often necessary to remove counterweights and other components, and use auxiliary vehicles such as flatbed trucks to transport these parts, which results in higher operating costs for wheeled cranes.

[0003] Existing technology employs a rear-mounted auxiliary trolley for traction. This trolley can carry counterweights and also support the boom by positioning it at the rear, thus balancing the axle load. This technology solves the axle load limitation problem and allows the counterweight to be carried on the vehicle, thereby reducing the operating costs of the crane.

[0004] Existing technologies, such as "Crane and its auxiliary trolley" (DE 10 2020 121 344 A1), disclose a technical solution for attaching a counterweight on an auxiliary trolley to a counterweight support of a crane. When attaching the counterweight, the counterweight is pushed to the corresponding position below the counterweight support of the crane by a telescopic hydraulic cylinder, thereby realizing the automatic attachment of the counterweight.

[0005] However, existing auxiliary trolleys are only used to place the boom or counterweight, and their function is limited.

[0006] Therefore, it is necessary to develop new types of multi-purpose auxiliary trolleys for cranes to expand their functions. Summary of the Invention

[0007] Purpose of the invention: To address the shortcomings and defects of existing technologies, this invention provides a multi-purpose auxiliary trolley for cranes, which expands the functionality of the auxiliary trolley. It can not only transport and attach counterweights, but also connect to the main frame. By configuring appropriate outriggers, the span of the outriggers can be increased. The auxiliary trolley can also be attached to the counterweight bracket of the upper vehicle to act as a counterweight. This multi-purpose trolley aims to reduce crane operating costs and improve crane performance.

[0008] Technical solution: The multi-purpose auxiliary trolley for cranes of the present invention is characterized in that: it includes an auxiliary trolley, the auxiliary trolley is equipped with a counterweight, the auxiliary trolley is equipped with auxiliary outriggers, the auxiliary trolley can be used to attach the counterweight, and when the auxiliary trolley is fixedly connected to the main frame through a connecting mechanism, the auxiliary outriggers of the auxiliary trolley extend out, thereby increasing the span of the outriggers of the entire crane.

[0009] The connecting mechanism includes two sets of upper and lower pins and a hydraulic cylinder. The hydraulic cylinder is installed in the mounting seat of the auxiliary trolley, and the pin is installed at the end of the hydraulic cylinder. The extension and retraction of the hydraulic cylinder is used to allow the pin to pass through or retract from the hole, thereby locking and unlocking the pin.

[0010] The main frame is provided with a boss and a traction mechanism mounting seat, and the auxiliary trolley is provided with an inner boss, an outer boss and a groove. The inner sides of the upper and lower bosses, the upper and lower outer bosses and the upper and lower inner bosses are all provided with through holes in the vertical direction for the pin to pass through the holes.

[0011] The auxiliary trolley can be attached to the rear of the crane's turntable, either alone or together with the counterweight, for counterweight purposes.

[0012] The auxiliary trolley or counterweight is attached using a hook-up mechanism.

[0013] The main frame is equipped with a turntable, which is connected to the auxiliary trolley via a traction mechanism. The main frame is equipped with rear support legs and front support legs. The turntable is equipped with a counterweight attachment mechanism and a counterweight cylinder. The counterweight attachment mechanism can extend and retract forward and backward, and the counterweight cylinder can extend and retract vertically. The two work together to attach the counterweight. The auxiliary trolley is supported off the ground by auxiliary support legs.

[0014] The process of attaching the counterweight includes the following steps:

[0015] 1) Raise the rear outriggers, front outriggers, and auxiliary outriggers to ensure that the entire vehicle's tires are off the ground;

[0016] 2) The counterweight attachment mechanism extends backward to the installation position above the counterweight;

[0017] 3) Extend the counterweight cylinder downwards to attach and fix the counterweight to the counterweight cylinder;

[0018] 4) The counterweight cylinder retracts upwards, fixing the counterweight to the corresponding position on the counterweight attachment mechanism, thus completing the counterweight attachment.

[0019] When the span of the crane's outriggers is increased, the following steps are included:

[0020] 1) Dismantle the traction mechanism and separate the main frame and auxiliary trolley;

[0021] 2) The crane reverses backward so that the upper and lower bosses at the main frame connection are inserted into the upper and lower grooves at the auxiliary trolley connection, ensuring that the vertical holes of each boss are aligned.

[0022] 3) Operate the hydraulic system to extend the oil cylinder and push the pin shaft to be inserted into the vertical holes of the boss and the outer boss in sequence, so as to complete the connection between the main frame and the auxiliary trolley.

[0023] 4) When lifting heavy loads, select to raise the front outrigger and the rear outrigger according to the lifting performance requirements, with the corresponding outrigger span L1; or raise the front outrigger and the auxiliary outrigger, with the corresponding outrigger span L2; the outrigger span L2 > L1.

[0024] The auxiliary trolley is used for counterweight in the following steps:

[0025] 1) Dismantle the traction mechanism and separate the main frame and auxiliary trolley;

[0026] 2) Raise the rear and front outriggers to ensure that all vehicle tires are off the ground;

[0027] 3) The counterweight attachment mechanism extends backward to the attachment position;

[0028] 4) The counterweight cylinder extends downwards, and the auxiliary trolley is hooked and fixed to the counterweight cylinder through the hooking structure;

[0029] 5) The counterweight cylinder retracts upward, fixing the auxiliary trolley to the corresponding position on the counterweight attachment mechanism, thus completing the attachment of the auxiliary trolley.

[0030] The hooking mechanism includes pulleys and ropes, and the hooking steps are as follows:

[0031] 1) Dismantle the traction mechanism and separate the main frame and auxiliary trolley;

[0032] 2) Raise the rear and front outriggers to ensure that all vehicle tires are off the ground;

[0033] 3) Connect one end of the wire rope of the hooking mechanism to the auxiliary trolley, and pull the auxiliary trolley to the corresponding position on the turntable by operating the hooking mechanism;

[0034] 4) Securely connect the auxiliary trolley to the turntable.

[0035] Beneficial Effects: Compared with existing technologies, this invention has the following significant advantages: This invention increases the transport counterweight or outrigger span by switching the connection state between the trolley and the frame, enabling multiple uses for a single trolley, thereby reducing crane operating costs and improving crane performance. This invention expands the function of the auxiliary trolley, enabling both counterweight transport and attachment, connection to the main frame, and increased outrigger span through appropriate outrigger configuration. The auxiliary trolley can also be attached to the upper counterweight bracket to act as a counterweight. Without altering the main structure of the wheeled crane, the longitudinal span of the crane can be increased by connecting the auxiliary trolley, further enhancing the crane's lifting capacity. The attachment of the counterweight or auxiliary trolley is achieved through a counterweight attachment mechanism and a counterweight cylinder, simplifying the process. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the crane equipped with an auxiliary trolley according to the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of the crane equipped with an auxiliary trolley of the present invention before the counterweight is attached;

[0038] Figure 3 This is a schematic diagram of the structure of the crane equipped with an auxiliary trolley according to the present invention after the counterweight is attached;

[0039] Figure 4 This is a side view of the structure of the present invention, which increases the span of the crane outriggers.

[0040] Figure 5 This is a top view of the structure of the present invention, which increases the span of the crane outriggers.

[0041] Figure 6 This is a schematic diagram of the connection mechanism of the present invention in the pin locking state;

[0042] Figure 7 This is a schematic diagram of the pin unlocking state of the connecting mechanism of the present invention;

[0043] Figure 8 This is a schematic diagram of the main frame connection structure of the present invention;

[0044] Figure 9 This is a schematic diagram of the auxiliary trolley connection structure of the present invention;

[0045] Figure 10 A schematic diagram of the structure of the auxiliary trolley of the present invention before it is attached as a counterweight;

[0046] Figure 11 This is a schematic diagram of the structure of the auxiliary trolley of the present invention after it is attached as a counterweight.

[0047] Figure 12 This is a schematic diagram of the structure of the present invention before the hooking mechanism is used;

[0048] Figure 13 This is a schematic diagram of the structure of the present invention after being attached using the attachment mechanism;

[0049] In the diagram, 1 is the main frame; 11 is the rear outrigger; 12 is the front outrigger; 13 is the boss; 14 is the traction mechanism mounting seat; 2 is the turntable; 21 is the counterweight attachment mechanism; 22 is the counterweight cylinder; 3 is the auxiliary trolley; 31 is the auxiliary outrigger; 32 is the inner boss; 33 is the outer boss; 34 is the groove; 4 is the counterweight; 5 is the traction mechanism; 6 is the connecting mechanism; 61 is the pin; 62 is the cylinder; and 7 is the attachment mechanism. Detailed Implementation

[0050] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0051] The auxiliary trolley of the present invention is a rear traction trolley of a crane, used to place the boom or counterweight.

[0052] like Figure 1 The crane multi-purpose auxiliary trolley of the present invention has an auxiliary trolley 3 equipped with a counterweight 4 and an auxiliary support leg 31. The auxiliary trolley 3 can be used to attach the counterweight 4. When the auxiliary trolley 3 is fixedly connected to the main frame 1 through the connecting mechanism 6, the auxiliary support leg 31 of the auxiliary trolley 3 extends out, thereby increasing the span of the crane's overall support legs.

[0053] The main frame 1 is equipped with a turntable 2. The main frame 1 is connected to the auxiliary trolley 3 through a traction mechanism 5. The main frame 1 is equipped with a rear support leg 11 and a front support leg 12. The turntable 2 is equipped with a counterweight attachment mechanism 21 and a counterweight cylinder 22. The counterweight attachment mechanism 21 can extend and retract forward and backward, and the counterweight cylinder 22 can extend and retract vertically. The two work together to attach the counterweight 4. The auxiliary trolley 3 is supported off the ground by the auxiliary support leg 31.

[0054] like Figure 2 , Figure 3 When attaching counterweight 4, the following steps are included:

[0055] 1) Raise the rear outrigger 11, front outrigger 12, and auxiliary outrigger 31 to ensure that the entire vehicle's tires are off the ground;

[0056] 2) The counterweight mounting mechanism 21 extends backward to the installation position above the counterweight 4;

[0057] 3) The counterweight cylinder 22 extends downward, and the counterweight 4 is hooked and fixed onto the counterweight cylinder 22 using existing known technology;

[0058] 4) The counterweight cylinder 22 retracts upward, fixing the counterweight 4 to the corresponding position on the counterweight mounting mechanism 21, thus completing the mounting of the counterweight 4.

[0059] Increased outrigger stride function:

[0060] like Figure 4 , Figure 5 , Figure 6 , Figure 7 The connecting mechanism 6 includes two sets of upper and lower pins 61 and a hydraulic cylinder 62. The hydraulic cylinder 62 is installed in the mounting seat of the auxiliary trolley 3, and the pins 61 are installed at the end of the hydraulic cylinder 62. The extension and retraction of the hydraulic cylinder 62 is used to allow the pins 61 to pass through the hole or retract, thereby locking and unlocking the pins 61.

[0061] like Figure 8 , Figure 9The main frame 1 is provided with a boss 13 and a traction mechanism mounting seat 14. The auxiliary trolley 3 is provided with an inner boss 32, an outer boss 33 and a groove 34. The inner sides of the upper and lower bosses 13, the upper and lower outer bosses 33 and the upper and lower inner bosses 32 are all provided with through holes in the vertical direction for the pin 61 to pass through the holes.

[0062] When increasing the span of the crane's outriggers, the following steps are included:

[0063] 1) Remove the traction mechanism 5 and separate the main frame 1 and the auxiliary trolley 3;

[0064] 2) The crane reverses backward so that the upper and lower protrusions 13 at the main frame connection are inserted into the upper and lower grooves 34 at the auxiliary trolley connection, ensuring that the vertical holes of each protrusion are aligned.

[0065] 3) Operate the hydraulic system to extend the oil cylinder 62 and push the pin 61 to be inserted into the vertical holes of the boss 13 and the outer boss 33 in sequence, so as to complete the connection between the main frame 1 and the auxiliary trolley 3.

[0066] 4) During lifting operations, depending on the lifting performance requirements, the front outrigger 12 and rear outrigger 11 can be supported, corresponding to an outrigger span L1; or the front outrigger 12 and auxiliary outrigger 31 can be supported, corresponding to an outrigger span L2; the outrigger span L2 > L1. Therefore, by adopting this technical solution, without changing the main structure of the wheeled crane, the longitudinal outrigger span of the crane can be further increased, thereby improving the lifting performance of the product.

[0067] The auxiliary trolley acts as a counterweight:

[0068] like Figure 10 , Figure 11 The auxiliary trolley 3 has a mounting structure on its top that engages with the counterweight cylinder 22. The steps for using the auxiliary trolley 3 for counterweight are as follows:

[0069] 1) Remove the traction mechanism 5 and separate the main frame 1 and the auxiliary trolley 3;

[0070] 2) Raise the rear outriggers 11 and front outriggers 12 to ensure that the entire vehicle's tires are off the ground;

[0071] 3) The counterweight attachment mechanism 21 extends backward to the attachment position;

[0072] 4) The counterweight cylinder 22 extends downward, and the auxiliary trolley 3 is hooked and fixed on the counterweight cylinder 22 through the hooking structure;

[0073] 5) The counterweight cylinder 22 retracts upward, fixing the auxiliary trolley 3 to the corresponding position on the counterweight attachment mechanism 21, thus completing the attachment of the auxiliary trolley 3.

[0074] The counterweight or auxiliary trolley can also be attached using a pulley-rope mechanism. The following explanation uses the attachment of the auxiliary trolley as an example.

[0075] like Figure 12 , Figure 13 The hooking mechanism 7 includes pulleys and ropes, and the hooking steps are as follows:

[0076] 1) Remove the traction mechanism 5 and separate the main frame 1 and the auxiliary trolley 3;

[0077] 2) Raise the rear outriggers 11 and front outriggers 12 to ensure that the entire vehicle's tires are off the ground;

[0078] 3) Connect one end of the wire rope of the hooking mechanism 7 to the auxiliary trolley 3, and pull the auxiliary trolley 3 to the corresponding position of the turntable 2 by operating the hooking mechanism 7;

[0079] 4) Fix the auxiliary trolley 3 to the turntable 2.

[0080] The auxiliary trolley 3 of the present invention can be attached to the rear of the turntable 2 of the crane, either alone or together with the counterweight 4, for counterweight purposes. The auxiliary trolley 3 or the counterweight 4 is attached using a hooking mechanism 7.

[0081] This invention achieves increased transport counterweight or outrigger span by switching the connection state between the trolley and the frame, enabling multiple uses for a single trolley and reducing crane operating costs while improving crane performance. It expands the functionality of the auxiliary trolley, allowing it to transport and attach counterweights, connect to the main frame, increase outrigger span by configuring appropriate outriggers, and also attach to the upper counterweight bracket to act as a counterweight. Without altering the main structure of the wheeled crane, the longitudinal span of the crane can be increased by connecting the auxiliary trolley, further enhancing the crane's lifting capacity. The attachment of the counterweight or auxiliary trolley is achieved through a counterweight attachment mechanism and a counterweight cylinder, making the process simple.

Claims

1. A multi-purpose auxiliary trolley for cranes, characterized in that: It includes an auxiliary trolley (3), which is equipped with a counterweight (4) and auxiliary outriggers (31). The auxiliary trolley (3) can be used to attach the counterweight (4). When the auxiliary trolley (3) is fixedly connected to the main frame (1) through the connecting mechanism (6), the auxiliary outriggers (31) of the auxiliary trolley (3) extend out, thereby increasing the span of the crane's outriggers.

2. The multi-purpose auxiliary trolley for cranes according to claim 1, characterized in that: The connecting mechanism (6) includes two sets of upper and lower pins (61) and a hydraulic cylinder (62). The hydraulic cylinder (62) is installed in the mounting seat of the auxiliary trolley (3). The pins (61) are installed at the end of the hydraulic cylinder (62). The extension and retraction of the hydraulic cylinder (62) are used to allow the pins (61) to pass through or retract from the hole, thereby locking and unlocking the pins (61).

3. The multi-purpose auxiliary trolley for cranes according to claim 2, characterized in that: The main frame (1) is provided with a boss (13) and a traction mechanism mounting seat (14). The auxiliary trolley (3) is provided with an inner boss (32), an outer boss (33) and a groove (34). The inner sides of the upper and lower bosses (13), the upper and lower outer bosses (33) and the upper and lower inner bosses (32) are all provided with through holes in the vertical direction for the pin (61) to pass through the holes.

4. The multi-purpose auxiliary trolley for cranes according to claim 1, characterized in that: The auxiliary trolley (3) can be attached to the rear of the crane turntable (2) alone or together with the counterweight (4) for counterweight purposes.

5. The multi-purpose auxiliary trolley for cranes according to claim 1, characterized in that: The auxiliary trolley (3) or counterweight (4) is attached by a hooking mechanism (7).

6. The multi-purpose auxiliary trolley for cranes according to claim 1, characterized in that: The main frame (1) is equipped with a turntable (2). The main frame (1) is connected to the auxiliary trolley (3) through a traction mechanism (5). The main frame (1) is equipped with a rear support leg (11) and a front support leg (12). The turntable (2) is equipped with a counterweight attachment mechanism (21) and a counterweight cylinder (22). The counterweight attachment mechanism (21) can extend and retract forward and backward, and the counterweight cylinder (22) can extend and retract up and down. The two work together to attach the counterweight (4). The auxiliary trolley (3) is supported off the ground by the auxiliary support leg (31).

7. The multi-purpose auxiliary trolley for cranes according to claim 6, characterized in that: The following steps are included when attaching the counterweight (4): 1) Raise the rear outrigger (11), front outrigger (12), and auxiliary outrigger (31) to ensure that the tires of the entire vehicle are off the ground; 2) The counterweight mounting mechanism (21) extends backward to the installation position above the counterweight (4); 3) The counterweight cylinder (22) extends downwards, and the counterweight (4) is hooked and fixed on the counterweight cylinder (22); 4) The counterweight cylinder (22) retracts upward to fix the counterweight (4) to the corresponding position of the counterweight hooking mechanism (21) and complete the hooking of the counterweight (4).

8. The multi-purpose auxiliary trolley for cranes according to claim 1, characterized in that: When the span of the crane's outriggers is increased, the following steps are included: 1) Remove the traction mechanism (5) and separate the main frame (1) and auxiliary trolley (3); 2) The crane reverses backward so that the upper and lower protrusions (13) at the main frame connection are inserted into the upper and lower grooves (34) at the auxiliary trolley connection, ensuring that the vertical holes of each protrusion are aligned. 3) Operate the hydraulic system to extend the oil cylinder (62) and push the pin (61) to be inserted into the vertical holes of the boss (13) and the outer boss (33) in sequence, so as to complete the connection between the main frame (1) and the auxiliary trolley (3); 4) During lifting operations, depending on the lifting performance requirements, select to support the front outrigger (12) and the rear outrigger (11), corresponding to the outrigger span L1; or support the front outrigger (12) and the auxiliary outrigger (31), corresponding to the outrigger span L2; the outrigger span L2 > L1.

9. The multi-purpose auxiliary trolley for cranes according to claim 4, characterized in that: The steps for using the auxiliary trolley (3) for counterweight are as follows: 1) Remove the traction mechanism (5) and separate the main frame (1) and auxiliary trolley (3); 2) Raise the rear outriggers (11) and front outriggers (12) to ensure that the tires of the entire vehicle are off the ground; 3) The counterweight attachment mechanism (21) extends backward to the attachment position; 4) The counterweight cylinder (22) extends downwards, and the auxiliary trolley (3) is hooked and fixed on the counterweight cylinder (22) through the hooking structure; 5) The counterweight cylinder (22) retracts upward, fixing the auxiliary trolley (3) to the corresponding position of the counterweight hooking mechanism (21), thus completing the hooking of the auxiliary trolley (3).

10. The multi-purpose auxiliary trolley for cranes according to claim 5, characterized in that: The hooking mechanism (7) includes pulleys and ropes, and the hooking steps are as follows: 1) Remove the traction mechanism (5) and separate the main frame (1) and auxiliary trolley (3); 2) Raise the rear outriggers (11) and front outriggers (12) to ensure that the tires of the entire vehicle are off the ground; 3) Connect one end of the wire rope of the hooking mechanism (7) to the auxiliary trolley (3), and pull the auxiliary trolley (3) to the corresponding position of the turntable (2) by manipulating the hooking mechanism (7); 4) Fix the auxiliary trolley (3) to the turntable (2).

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