Crane counterweight mounting assembly

Abstract

The utility model discloses a mounting assembly for a balancing weight of a crane. The mounting assembly comprises a balancing weight, a connecting piece and a pulley assembly for guiding, the balancing weight is provided with a plurality of first pulleys for hooking the balancing weight, the tail part of the connecting piece is provided with branches in parallel, the number of the branches is consistent with that of the first pulleys, the pulley assembly comprises a second pulley, and the second pulley is provided with a guide groove for guiding the branches. According to the utility model, the counterweight is mounted behind the lifting jack turntable through the mounting assembly, an oil cylinder and a related control module are not required to be additionally arranged, the mounting and maintenance are convenient, the pulley arranged on the counterweight block serves as a movable pulley, and the self-driving structure load of the crane is reduced while the self-structure of the crane is fully utilized to mount the counterweight; and the performance of the crane can be maintained.

Description

Technical Field

[0001] The utility model relates to a crane accessory, in particular to a crane counterweight installation assembly. Background Art

[0002] An off-road tire crane is a wheeled crane that can use outriggers to support lifting operations and can also use tires to lift and travel with the load. The counterweight is an important component of an off-road tire crane. Its function is to generate an anti-overturning moment to prevent the entire machine from tipping over when the off-road tire crane is lifting. Conventional counterweight attachment is generally achieved through a counterweight attachment mechanism. The counterweight attachment mechanism includes an attachment cylinder, an attachment cylinder bracket, and a counterweight. The attachment cylinder is fixed on both sides of the rear section of the crane's slewing turntable structure. The rear section of the turntable is often equipped with a lifting hydraulic system and an electrical system. The space is compact, and it interacts with the counterweight attachment mechanism. The installation and maintenance convenience is poor, and the cylinder layout position is limited. In addition, the cylinder attachment system is relatively expensive, the attachment system is complex, there are many failure points, and the reliability is poor.

[0003] The invention patent with publication number CN 109335972 A discloses a self-loading and unloading device for a lifting mechanism, in which a counterweight is connected to a crane arm through a connecting piece bypassing a mounting portion, so that when the crane arm rotates relative to the mounting platform, the counterweight moves closer to or farther from the mounting portion under the action of the connecting piece. In this scheme, connecting pieces are installed on both sides of the crane arm to ensure the stability of the counterweight structure, which is complex in structure. The driving force of the counterweight comes from the crane arm, which will reduce the performance of the crane arm. Utility Model Content

[0004] Purpose of the utility model: The purpose of the utility model is to provide a crane counterweight installation assembly that is easy to assemble and maintains lifting performance.

[0005] Technical solution: The utility model describes a crane counterweight installation assembly, comprising a counterweight block, a connecting piece, and a pulley assembly for guiding; the counterweight block is provided with a plurality of first pulleys for hanging the counterweight block, the tail of the connecting piece is provided with branches in parallel with the number of the first pulleys, the pulley assembly comprises a second pulley, and the second pulley is provided with a guide groove for guiding the branches.

[0006] Preferably, a baffle is provided at the bottom of the first pulley, and the baffle and the roller of the first pulley are combined to form a channel for the tail branch of the connecting member to pass through, so as to prevent the tail branch of the connecting member from falling off the road.

[0007] Preferably, the head of the connecting member is detachably connected to the tail through the first joint, the pin shaft, the pull plate, and the tail, so as to facilitate the removal of the tail branch and the installation and removal of the counterweight.

[0008] Preferably, the tail branch of the connecting member is connected to the pull plate via an adjustable second joint.

[0009] Preferably, a support for connecting to a turntable is provided at the free end of the tail branch of the connecting member.

[0010] Preferably, the first pulleys are an even number and are symmetrically arranged on both sides and / or both ends of the top of the counterweight block.

[0011] Preferably, the first pulleys are an odd number and are symmetrically arranged on the center line of the top surface of the counterweight block and on both sides of the center line.

[0012] Preferably, a positioning hole is provided at the bottom of the counterweight, which can be roughly positioned in cooperation with the frame positioning pad and placed directly below the rear section of the turntable.

[0013] Preferably, a cable rack is provided on the top of the counterweight, which is used to wrap around the tail branch of the connector when the counterweight is not mounted.

[0014] Preferably, the counterweight block is hollow inside, and the first pulley is embedded in the counterweight block.

[0015] Preferably, the pulley assembly further comprises a third pulley for reversing the head body of the connector. The head of the connector can be reversing by using a pulley block on the top of the crane boom, or by adding a third pulley.

[0016] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. Easy to assemble and maintain the performance of the crane arm: it can be directly installed on the outside of the crane, without the need to add a counterweight lifting device (such as a double oil cylinder) and a hydraulic and electrical pipe line interface. The pulley on the counterweight block acts as a fixed pulley, reducing the load on the crane arm; 2. The structure of the crane itself can be fully utilized; 3. The weight of the entire machine is effectively reduced, reducing the cost of use; 4. It is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0018] Figure 2 This is a partial structural diagram of the first embodiment of the utility model;

[0019] Figure 3 A schematic diagram of the tail structure of the connector of the first embodiment of the utility model;

[0020] Figure 4 It is a partial structural schematic diagram of the second and third embodiments of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the utility model in a hooked state;

[0022] Figure 6 This is a schematic diagram of the structure of the utility model in a non-hook state. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0024] Example 1: Figures 1 to 3 , which is a schematic diagram of the structure of the crane counterweight installation assembly of the utility model, the installation assembly is mainly composed of a counterweight block 2, a connecting piece 4, and a pulley assembly 3 for guiding.

[0025] The counterweight 2 is hollow inside, and four pulleys 21 are installed in the middle of the top surface, so that the counterweight 2 can be hung behind the turntable 1 of the crane, and the pulley 21 is embedded in the counterweight 2. The pulley 21 is composed of a connecting base 211, a roller 212 and a baffle 213. The top of the connecting base 211 is fixed to the counterweight 2 by fasteners. Pin holes are provided on both sides of the connecting base 211. The roller 212 is rotatably connected to the connecting base 211 through the pin shaft, the pin hole, and the connecting base 211. The baffle 213 is fixed below the connecting base 211, and is wrapped around the outer ring of the roller 212 with equal clearance to form a channel for the connecting member 4 to pass through, so as to prevent the connecting member 4 from falling off the road when it is not hung.

[0026] The connecting member 4 is a two-section cable assembly, including a detachably connected head 41 (first section) and a tail 42 (second section), the tail 42 is provided with a plurality of parallel branches 421, each branch 421 is inserted into a channel surrounded by the roller 212 and the baffle 213 of the pulley 21. A joint 4211 is provided at the free end of each branch 421, and the joint 4211 is connected to the support 13.

[0027] The connection structure between the head 41 and the tail 42 of the connector is as follows: a joint 411 is provided at one end where the head 41 and the tail 42 are connected, and a pull plate 422 is provided at one end where the tail 42 and the head 41 are connected. The head 41 and the tail 412 are detachably connected through the joint 411, the pin, and the pull plate 422. The pull plate 422 is provided to ensure that each branch 421 is parallel.

[0028] The tail 42 and the pull plate 422 are connected by a joint 423, which is an adjustable joint, including a half-joint 4231 connected to the main body of the tail 42, and a half-joint 4232 connected to the pull plate 422. The half-joint 4231 is provided with an internal thread, one end of the half-joint 4232 is provided with an external thread, and the other end is fixed to the pull plate 422 by a pin shaft. The length of the half-joint 4231 and the half-joint 4232 is adjusted by a threaded pair to prevent the counterweight 2 from tilting due to uneven length of the branch 421.

[0029] The pulley assembly 3 is mainly composed of a pulley 31, which is composed of a coupling seat 311 and a roller 312. The roller 312 is provided with a guide groove for guiding the branch 421. The pulley assembly 3 can also be provided with a pulley 32 (not shown) to make the head 41 of the connector body reverse, and the roller of the reversing pulley of the pulley 32 is provided with a guide groove for guiding the connector 4.

[0030] The bottom of the counterweight is provided with a positioning hole 22 (not shown), which can be roughly positioned with the frame positioning pad 10 and placed directly below the rear section of the turntable 1. A cable rack 23 is provided on the top of the counterweight 2. When not in the hanging state, the tail 42 of the connector can be disassembled and wound around the cable rack 23.

[0031] During installation, if Figure 5 As shown, the first installation method is: the support 13 is fixedly mounted on the bottom plate of the turntable 1, the connection seat 311 of the pulley 31 is fixedly mounted on the turntable 1, the free end of the head 41 of the connecting member 4 is connected to the turntable 1 or the lifting drum of the driving device 6 behind the turntable 1, the main body of the head 41 is connected to the tail 42 after being reversed and guided by the pulley block 51, 52 at the top of the crane boom, the branch 421 of the tail bypasses the pulley 31, and then passes through the channel of the pulley 21, and is connected to the support 13, and the counterweight 2 is hung behind the turntable 2. The second installation method is similar to the first one, except that a pulley 32 is added, and the pulley 32 is installed on one side of the middle part of the boom body (the side close to the turntable when the boom is raised), and the main body of the head 41 is reversed by the pulley 32.

[0032] In the non-hook state, the joint 411 and the pull plate 422 are disassembled, the connecting member branch 421 is wound around the cable frame 23, and the counterweight block 2 is placed directly below the rear section of the turntable 1. Figure 6 As shown, the connecting member head 41 can also be retracted from the tail of the boom 8 to the bottom of the boom head via the pulley blocks 51 and 52 and connected to the hook 9 below.

[0033] Example 2: Figure 4 As shown on the left, in this embodiment, there can also be the following deformation: there are two pulleys 21, there are two branches 421, and the pulleys 21 are symmetrically arranged and embedded at both ends of the counterweight block 2.

[0034] Example 3: Figure 4 As shown on the right, in this embodiment, there can also be the following deformation: there are three pulleys 21, there are three branches 421, and the pulleys 21 are arranged on the center line of the counterweight block 2 and symmetrically arranged on both sides of the center line.

Claims

1. A crane counterweight mounting assembly, characterized in that: The invention comprises a counterweight (2), a connecting member (4), and a pulley assembly (3) for guiding; the counterweight (2) is provided with a plurality of first pulleys (21) for hanging the counterweight; the tail portion (42) of the connecting member is provided with branches (421) in parallel with the number of the first pulleys (21); the pulley assembly (3) comprises a second pulley (31); and the second pulley (31) is provided with a guide groove for guiding the tail branch of the connecting member.

2. The crane counterweight installation assembly according to claim 1, characterized in that: A baffle (213) is provided at the bottom of the first pulley (21), and the baffle and the roller of the first pulley (21) are combined to form a channel for the tail branch (421) of the connecting member to pass through.

3. The crane counterweight installation assembly according to claim 1, characterized in that: The head portion (41) of the connecting piece is detachably connected to the tail portion (42) of the connecting piece via a first joint (411), a pin shaft, a pull plate (422) and the connecting piece.

4. The crane counterweight installation assembly according to claim 3, characterized in that: The tail branch (421) of the connecting member is connected via an adjustable second joint (423) and a pull plate (422).

5. The crane counterweight installation assembly according to claim 1, characterized in that: The free end of the tail branch (421) of the connecting member is provided with a support (13) for connecting to the turntable (1).

6. The crane counterweight mounting assembly according to claim 1, characterized in that: The first pulleys (21) are an even number and are symmetrically arranged on both sides and / or both ends of the top of the counterweight block.

7. The crane counterweight mounting assembly according to claim 1, characterized in that: The first pulleys (21) are an odd number and are symmetrically arranged on the center line of the top surface of the counterweight block and on both sides of the center line.

8. The crane counterweight mounting assembly according to claim 1, characterized in that: The counterweight block (2) has a positioning hole at the bottom and a cable rack (23) at the top.

9. The crane counterweight mounting assembly according to claim 1, characterized in that: The counterweight block (2) is hollow inside, and the first pulley (21) is embedded in the counterweight block.

10. The crane counterweight installation assembly according to claim 1, characterized in that: The pulley assembly (3) also includes a third pulley for reversing the direction of the head (41) body of the connecting member (4).

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