Novel counterweight fixing device

Abstract

The utility model discloses a novel counterweight fixing device, which is characterized in that supports are respectively arranged on the left side and the right side of a counterweight bracket, and pin lock mechanisms are arranged on the supports; notches are formed in the two sides of the bottom of the balance weight base, round holes are formed in the faces, matched with the pin lock mechanisms, of the notches, and the balance weight base is embedded into the balance weight support. And a plug pin of the pin lock mechanism corresponds to the round hole. A bolt and gasket combination in the prior art is optimized, the pin locks are installed on the left side and the right side of the balance weight support, each pin lock comprises the plug pin capable of moving horizontally, the holes are formed in the left side and the right side of the balance weight base in a matched mode, the pin locks have the unlocking state and the locking state, and the plug pins are inserted into the holes of the balance weight base in the locking state, so that the balance weight is fixed.

Description

Technical Field

[0001] The utility model relates to the field of cranes, in particular to a novel counterweight fixing device. Background Art

[0002] A wheeled crane is a mobile crane equipped with pneumatic tires and operating on a specialized chassis. The frame, a structural framework that spans the axles, serves as the foundation of the wheeled crane. It provides mounting and connection points for various chassis systems, and is a welded, integral component that absorbs the forces and torques generated during operation and transmits them to the outriggers. The counterweight, a single or combined iron block, is attached to the rear of the crane's upper body to maintain balance during lifting.

[0003] When lifting heavy loads, wheeled cranes require a counterweight attached to the rear of the vehicle's turntable to balance the bending moment created by the load and prevent the vehicle from tipping. To ensure axle loads meet regulatory requirements and allow for direct attachment of the counterweight when moving to the next construction site, a single counterweight or a combination of counterweights is placed on the front counterweight bracket of the vehicle frame during transport. To ensure the stability of the counterweight during transport and prevent it from bouncing around and endangering driving safety, it must be secured.

[0004] The traditional way to fix a single counterweight is to use a combination of four long bolts and washers. A threaded hole is opened on the top of the column of the counterweight bracket. After the counterweight is embedded in the bracket column, the bolt is screwed through the washer into the threaded hole of the bracket column and tightened. The washer presses the counterweight to achieve fixation. The principle of the traditional fixing method of the counterweight combination is the same as that of the single counterweight, except that the length of the bolt needs to be lengthened. These two fixing methods are cumbersome. Every time the counterweight is mounted or carried to a new location, the bolts need to be repeatedly disassembled and assembled, which is time-consuming and labor-intensive. The bolts used in the two fixing states are of different lengths. When the counterweight does not need to be fixed, the number of bolts and washers is large and difficult to store. When the counterweight combination is fixed, the bolt length is long, and the impact force is large when the counterweight is bumped and jumped, and the bolts are easily deformed.

[0005] Therefore, it is necessary to develop a new type of counterweight fixing device in a targeted manner to solve the problems of complicated and inconvenient process of fixing bolts and washers, large number of bolts and washers, difficulty in storage, and easy deformation of bolts. Utility Model Content

[0006] Purpose of the utility model: In response to the shortcomings and defects of the existing technology, the utility model provides a new counterweight fixing device, which optimizes the bolt and gasket combination of the existing solution, and installs pin locks on the left and right sides of the counterweight bracket. The pin lock includes a horizontally movable pin, and the left and right sides of the counterweight base have matching openings. The pin lock has two states: unlocked and locked. In the locked state, the pin is inserted into the hole of the counterweight base to fix the counterweight.

[0007] Technical solution: The utility model is a new type of counterweight fixing device, which is characterized in that: supports are respectively provided on the left and right sides of the counterweight bracket, and a pin locking mechanism is provided on the supports; notches are opened on both sides of the bottom of the counterweight base, and circular holes are opened on the mating surfaces of the notches and the pin locking mechanism, and the counterweight base is embedded in the counterweight bracket; the pin of the pin locking mechanism corresponds to the circular hole.

[0008] Wherein, the counterweight base is provided with four groups of circular holes, and the counterweight base is connected to the counterweight bracket through the four groups of circular holes.

[0009] Wherein, the bottom of the counterweight base corresponds to the upper surface of the counterweight bracket.

[0010] The pin locking mechanism comprises a latch, a shaft sleeve and a circular plate connected in sequence; the shaft sleeve is provided with a slide groove, and a left groove and a right groove are provided at both ends of the slide groove.

[0011] Wherein, the handle of the latch corresponds to the sliding groove.

[0012] Wherein, the shaft sleeve and the circular plate are connected by a plurality of screws.

[0013] Wherein, the pin locking mechanism is fixedly connected to the support.

[0014] Beneficial Effects: Compared with existing technologies, this utility model has the following significant advantages: When securing or unlocking a single counterweight, the utility model only requires pushing the latch, eliminating the need to remove and install bolts one by one, simplifying the process and improving convenience. When securing or unlocking a counterweight assembly, the utility model uses a pin lock instead of some bolts and washers, significantly reducing the number of parts and solving the problem of difficult storage of bolts and washers. Furthermore, the pin lock shares the impact force caused by the counterweight's bouncing, preventing bolt deformation and making it safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the existing counterweight base fixing structure;

[0016] Figure 2 This is a schematic diagram of the existing balancing weight combination fixed structure;

[0017] Figure 3 It is a structural diagram of the utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 5 This is a structural diagram of the pin locking mechanism of the present utility model;

[0020] In the figure, 1 is a support; 2 is a pin locking mechanism; 21 is a latch; 22 is a sleeve; 23 is a slide groove; 24 is a circular plate; 25 is a left groove; 26 is a right groove; 27 is a screw; 3 is a notch; and 4 is a circular hole. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0022] This new counterweight fixing device features a support 1 on each side of the counterweight bracket, each equipped with a locking mechanism 2. Notches 3 are formed on either side of the bottom of the counterweight base, and circular holes 4 are formed on the surfaces that mate with the locking mechanism 2. The counterweight base is inserted into the counterweight bracket. The latch 21 of the locking mechanism 2 corresponds to the circular holes 4. The counterweight base is provided with four sets of circular holes, connecting the counterweight base to the counterweight bracket via these four sets of holes. The bottom of the counterweight base corresponds to the upper surface of the counterweight bracket.

[0023] The pin locking mechanism 2 of the present invention includes a latch 21, a sleeve 22, and a circular plate 24 connected in sequence; the sleeve 22 is provided with a slide 23, with a left groove 25 and a right groove 26 formed at each end of the slide 23. The handle of the latch 21 corresponds to the slide 23. The sleeve 22 and the circular plate 24 are connected by a plurality of screws 27. The pin locking mechanism 2 is fixedly connected to the support 1. The pin locking mechanism 2 can not only be assembled on the support 1, but can also be converted to a welded type, as long as the latch 21 can move horizontally and has both unlocked and locked states. The pin locking mechanism 2 can be arranged not only on the left and right sides of the counterweight bracket, but also on the front and back sides of the bracket, and the number is not limited.

[0024] like Figure 1 Schematic diagram of the existing counterweight base fixing structure. The counterweight base is arranged with four sets of circular holes on the body of the counterweight base. Through the circular holes, the counterweight base is embedded in the counterweight support column. The bottom of the counterweight and the upper surface of the support match to achieve restraint and fixation in five directions: front, back, left, right, and bottom. Because there is no upward restraint, when the crane carrying the counterweight base moves, if the road surface is bumpy, the counterweight will jump up, endangering driving safety. Therefore, the upward freedom needs to be restricted. This can be achieved by using a combination of four sets of bolts and washers. The top of the support column has a threaded hole. The bolts are screwed through the washers into the threaded holes of the support column and tightened. The washers press against the counterweight base to achieve upward restraint and fixation.

[0025] like Figure 2Schematic diagram of the existing counterweight combination fixing structure. Counterweights B and C are connected to the counterweight A (counterweight base) through the columns on the left and right sides. The combination is embedded in the bracket through the four groups of round holes of counterweight A. Counterweights B and C are also arranged with four groups of round holes. Bolts are screwed through the gaskets into the threaded holes of the counterweight bracket columns and tightened. The gaskets press the upper surface of counterweight C to achieve the upward constraint and fixation of the counterweight combination. Figure 1 Bolts for fixing the middle counterweight base, Figure 2 The length of the middle bolt is increased to press down the balance weight C.

[0026] However, in actual operation, Figure 1 and Figure 2 The fixing method is rather complicated. Every time the counterweight is mounted or carried to another location, the bolts need to be repeatedly disassembled and assembled, which is time-consuming and labor-intensive. The bolt lengths used in the two states are different. When the counterweight does not need to be fixed, the number of bolt washers is large and difficult to store. When the counterweight is fixed, the bolt length is longer. When the counterweight is bumped and jumped, the impact force is large and the bolts are easily deformed.

[0027] In response to the problems of the existing technology, the present invention optimizes the existing technical structure:

[0028] like Figure 5 The latch mechanism 2 is assembled from a latch 21, a sleeve 22, a circular plate 24, and a screw 27. A guide slot 23 is defined on the sleeve 22, with a left groove 25 and a right groove 26 at each end. Rotating the latch handle until it aligns with the guide slot 23 allows the latch 21 to move horizontally along the guide slot 23. When the latch 21 moves to the far left, the guide slot 23 engages the latch handle. Rotating the handle into the left groove 25 locks the latch. Similarly, when the latch 21 moves to the far right and the latch handle rotates into the right groove 25, the latch is unlocked.

[0029] like Figure 3-4 Four groups of circular holes are arranged on the body of the counterweight base. Through the circular holes, the counterweight base is embedded in the column of the counterweight bracket. The bottom of the counterweight and the upper surface of the bracket match to achieve constraint fixation in five directions: front, back, left, right and bottom. Supports 1 are welded on the left and right sides of the counterweight bracket respectively, and a pin lock mechanism 2 is installed on the support. Notches 3 are opened on both sides of the bottom of the counterweight base to prevent interference between the counterweight and the support and the pin lock. Circular holes 4 are opened on the matching surfaces of the notch 3 and the pin lock. Push the pin 21 in the pin lock mechanism 2 to the far left, insert the pin 21 into the circular hole 4 of the notch 3 of the counterweight base, and the pin lock will be in the locked state, realizing constraint fixation of the counterweight in the upward direction. To release the counterweight fixation, just push the pin 21 to the far right and the pin lock will be unlocked.

[0030] When a fixed balancing weight combination is required, such as Figure 3-4 As shown, insert the pin 21 into the round hole 4 of the counterweight base, and then Figure 2 As shown, extended bolts are used to press the counterweight C, thereby ultimately achieving upward constraint fixation of the counterweight assembly.

Claims

1. A new type of counterweight fixing device, characterized by: A support (1) is provided on the left and right sides of the counterweight bracket, and a pin lock mechanism (2) is provided on the support (1); notches (3) are provided on both sides of the bottom of the counterweight base, and circular holes (4) are provided on the matching surfaces of the notches (3) and the pin lock mechanism (2), and the counterweight base is embedded in the counterweight bracket; a latch (21) of the pin lock mechanism (2) corresponds to the circular hole (4).

2. The novel counterweight fixing device according to claim 1 is characterized in that: The counterweight base is provided with four groups of circular holes, and the counterweight base is connected to the counterweight bracket via the four groups of circular holes.

3. The novel counterweight fixing device according to claim 2 is characterized in that: The bottom of the counterweight base corresponds to the upper surface of the counterweight bracket.

4. The novel counterweight fixing device according to claim 1 is characterized in that: The pin lock mechanism (2) comprises a latch (21), a shaft sleeve (22) and a circular plate (24) connected in sequence; the shaft sleeve (22) is provided with a slide groove (23), and the two ends of the slide groove (23) are provided with a left groove (25) and a right groove (26).

5. The novel counterweight fixing device according to claim 1 is characterized in that: The handle of the latch (21) corresponds to the slide groove (23).

6. The novel counterweight fixing device according to claim 4 is characterized in that: The shaft sleeve (22) and the circular plate (24) are connected via a plurality of screws (27).

7. The novel counterweight fixing device according to claim 1 is characterized in that: The pin locking mechanism (2) is fixedly connected to the support (1).

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