Swing arm type counter weight self-loading and unloading mechanism

Abstract

The utility model is suitable for the technical field of engineering machinery, and provides a swing arm type counter weight self-loading and unloading mechanism. A crawler chassis; the counterweight lifting swing arm is arranged behind the crawler chassis and is hinged to the crawler chassis; the swing arm oil cylinder is arranged on the top of the rear portion of the crawler chassis and hinged to the balance weight lifting swing arm. And the movable counter weight is arranged behind the counter weight lifting swing arm and is movably connected with the counter weight lifting swing arm. Compared with the prior art, the balance weight self-loading and unloading mechanism has the beneficial effects that the balance weight lifting swing arm is arranged behind the crawler chassis and is hinged with the crawler chassis, so that the space of the balance weight mounting frame is not occupied, and the problem that the balance weight self-loading and unloading mechanism is arranged on the balance weight mounting frame in the prior art is solved; therefore, when the space of the counterweight mounting rack is limited, the arrangement of the counterweight self-loading and unloading mechanism cannot be implemented.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a swing-arm type counterweight self-loading and unloading mechanism. Background Art

[0002] The counterweight self-loading and unloading mechanism is a mechanism that can use its own device to install the counterweight on the turntable, and has a simple structure, easy operation and high reliability.

[0003] The existing counterweight self-loading and unloading mechanism mainly realizes the counterweight lifting by lifting the counterweight into place through the power mechanism on the counterweight mounting frame;

[0004] For example, the crane counterweight self-loading and unloading device with application number CN202320911977.3 uses a hydraulic cylinder and a pulley block to pull a steel wire rope, and uses the steel wire rope to lift the counterweight as a whole to the corresponding position of the turntable and fix it;

[0005] Application number: CN202123180319.1 is a new type of crawler crane counterweight self-loading and unloading mechanism. The counterweight box is arranged on the tail of the crane body, and the power mechanism composed of a cylinder and a wire rope is used to lift and translate the counterweight block into the counterweight box.

[0006] The counterweight self-loading and unloading device, counterweight system and lifting machinery with application number CN202223343359.8 are equipped with a winch and pulley block on a turntable to lift the counterweight to the installation position via a sling.

[0007] The self-loading and unloading device for a counterweight used in a truck crane, application number CN201921276136.X, is designed to achieve self-loading and unloading by providing a lifting cylinder on the mounting bracket assembly and lifting the counterweight by the lifting cylinder.

[0008] The counterweight self-loading and unloading mechanisms of the above-mentioned patents are all arranged on the counterweight mounting frame, which leads to the situation that when the space of the counterweight mounting frame is limited, the counterweight self-loading and unloading mechanism arrangement of the prior art cannot be implemented. In addition, since the multiple counterweight blocks for self-loading and unloading in the prior art are stacked and arranged in the height direction, for example, when the arrangement of the counterweight blocks in the height direction is limited by space, it is sometimes necessary to arrange and fix the multiple counterweight blocks in a circular direction (with the rotation center of the turntable as the center of the circle). However, since the counterweight self-loading and unloading mechanism in the prior art is set on the counterweight mounting frame, the position of the counterweight mounting frame is fixed relative to the turntable, which makes it impossible to achieve a circular array arrangement of multiple counterweight blocks.

[0009] Therefore, how to provide a swing-arm counterweight self-loading and unloading mechanism is a problem that those skilled in the art urgently need to solve. Utility Model Content

[0010] The purpose of the utility model is to provide a swing-arm type counterweight self-loading and unloading mechanism, aiming to solve the problems mentioned in the background technology.

[0011] The utility model is implemented as follows: a swing arm type counterweight self-loading and unloading mechanism, comprising;

[0012] Track chassis;

[0013] A counterweight lifting swing arm, the counterweight lifting swing arm being arranged at the rear of the crawler chassis and being hinged to the crawler chassis;

[0014] A swing arm oil cylinder is arranged on the top of the rear of the crawler chassis and is hinged to the counterweight lifting swing arm;

[0015] A movable counterweight, the movable counterweight being arranged behind the counterweight lifting swing arm and being movably connected to the counterweight lifting swing arm;

[0016] A slewing mechanism, the slewing mechanism being arranged on the top in front of the crawler chassis;

[0017] A turntable, which is arranged on the top of the rotary mechanism;

[0018] a counterweight mounting frame, the counterweight mounting frame being arranged at the rear of the turntable and hinged to the turntable;

[0019] A lifting cylinder is provided at the rear of the top of the turntable and is hinged to the counterweight mounting frame;

[0020] The counterweight lifting swing arm, the swing arm oil cylinder, the movable counterweight, the slewing mechanism, the turntable, the counterweight mounting frame and the lifting oil cylinder constitute a swing arm type counterweight self-loading and unloading mechanism.

[0021] Preferably, a roller is movably installed below the movable counterweight, a detachable armrest is assembled behind the movable counterweight, and an armrest mounting pin is provided between the detachable armrest and the movable counterweight for connection and fixation.

[0022] Preferably, the front array of the movable counterweight is provided with mounting pin holes, the counterweight mounting frame is provided with a cross bar, and is arranged in a circular array around the rotation center of the turntable, a counterweight mounting hole structure is provided below the cross bar, and the end face of the counterweight lifting swing arm is an L-shaped structure.

[0023] Preferably, the end face of the counterweight lifting swing arm contacts the front end face and the lower end face of the movable counterweight, and a swing arm positioning pin is provided at the connection between the counterweight lifting swing arm and the mounting pin hole below.

[0024] Preferably, a hook structure slot is provided above the movable counterweight, the hook structure slot is movably hooked with the cross bar, and a counterweight positioning pin is provided between the counterweight mounting hole structure and the upper mounting pin hole.

[0025] Preferably, the swing arm positioning pin passes through the counterweight lifting swing arm and the mounting pin hole below, so that the movable counterweight in contact with the counterweight lifting swing arm is connected and fixed.

[0026] Preferably, the counterweight positioning pin passes through the counterweight mounting hole structure and the mounting pin hole above, so that the counterweight mounting frame is connected and fixed to the movable counterweight moved upward.

[0027] Compared with the prior art, the beneficial effect of the present invention is that a swing arm type counterweight self-loading and unloading mechanism composed of a counterweight lifting swing arm, a movable counterweight, a counterweight mounting frame and other structures is provided, and the counterweight lifting swing arm is provided behind the crawler chassis and hinged to the crawler chassis, so that the space of the counterweight mounting frame does not need to be occupied, thereby avoiding the prior art in which the counterweight self-loading and unloading mechanism is provided on the counterweight mounting frame, resulting in the situation that the counterweight self-loading and unloading mechanism cannot be implemented when the space of the counterweight mounting frame is limited.

[0028] At the same time, by arranging multiple cross bars and counterweight locating pin mounting hole structures under the cross bars on the counterweight mounting frame, these cross bars and counterweight locating pin mounting hole structures are arranged in a circular array relative to the rotation center of the turntable, and a movable counterweight can be installed on each cross bar, thereby utilizing the function of the turntable's free rotation and arranging the structure on which the counterweight can be installed in a circular array around the rotation center of the turntable, thereby realizing self-loading and unloading of multiple movable counterweight blocks, thereby avoiding the problem in the prior art that the counterweight self-loading and unloading mechanism is arranged on the counterweight mounting frame, resulting in the counterweight mounting frame being fixed relative to the turntable, and the inability to realize a circular array arrangement of multiple counterweight blocks.

[0029] The end of the counterweight lifting swing arm is set into an L-shaped structure, which is in contact with the front end face and the lower end face of the movable counterweight, and the counterweight lifting swing arm and the movable counterweight are fixedly connected together through the swing arm locating pin, so that the counterweight lifting swing arm and the movable counterweight can be quickly and conveniently connected together. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 A schematic diagram of the overall appearance and structure of a swing-arm type counterweight self-loading and unloading mechanism provided by an embodiment of the utility model;

[0032] Figure 2 This is a schematic diagram of the main appearance structure of a swing-arm type counterweight self-loading and unloading mechanism provided by an embodiment of the utility model;

[0033] Figure 3A schematic structural diagram of the connection between the counterweight lifting swing arm and the movable counterweight of a swing-arm type counterweight self-loading and unloading mechanism provided by an embodiment of the utility model;

[0034] Figure 4 A schematic diagram of a swing-arm type counterweight self-loading and unloading mechanism according to an embodiment of the present invention showing a state in which a movable counterweight is lifted by a swing-arm;

[0035] Figure 5 A schematic structural diagram of the connection between the counterweight mounting frame and the movable counterweight of a swing-arm type counterweight self-loading and unloading mechanism provided by an embodiment of the utility model;

[0036] Figure 6 A schematic diagram of the installation of a side crossbar of a swing-arm type counterweight self-loading and unloading mechanism provided by an embodiment of the present utility model;

[0037] Figure 7 This is a schematic diagram of multiple movable counterweight structures of a swing-arm type counterweight self-loading and unloading mechanism provided by an embodiment of the utility model.

[0038] In the figure: 1- crawler chassis, 2- counterweight lifting swing arm, 3- swing arm cylinder, 4- movable counterweight, 5- slewing mechanism, 6- turntable, 7- counterweight mounting frame, 8- lifting cylinder, 9- roller, 10- detachable handrail, 11- handrail mounting pin, 12- mounting pin hole, 13- cross bar, 14- counterweight mounting hole structure, 15- swing arm locating pin, 16- hook structure slot, 17- counterweight locating pin. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0041] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 FIG. 1 is a schematic structural diagram of a swing-arm type counterweight self-loading and unloading mechanism provided by an embodiment of the present invention, comprising:

[0042] Track chassis 1;

[0043] The counterweight lifting swing arm 2 is arranged at the rear of the crawler chassis 1 and is hinged to the crawler chassis 1;

[0044] The swing arm oil cylinder 3 is arranged at the top of the rear of the crawler chassis 1 and is hinged to the counterweight lifting swing arm 2;

[0045] The movable counterweight 4 is arranged behind the counterweight lifting swing arm 2 and is movably connected to the counterweight lifting swing arm 2;

[0046] The slewing mechanism 5 is arranged at the top in front of the crawler chassis 1;

[0047] A turntable 6 is provided on top of the rotary mechanism 5;

[0048] The counterweight mounting frame 7 is arranged at the rear of the turntable 6 and is hinged to the turntable 6;

[0049] A lifting cylinder 8 is provided at the rear of the top of the turntable 6 and is hinged to the counterweight mounting frame 7;

[0050] The counterweight lifting swing arm 2, the swing arm cylinder 3, the movable counterweight 4, the rotary mechanism 5, the turntable 6, the counterweight mounting frame 7 and the lifting cylinder 8 constitute a swing arm type counterweight self-loading and unloading mechanism.

[0051] In the embodiment of the present invention, when in use, the movable counterweight 4 is movably connected to the counterweight lifting swing arm 2, and then the swing arm cylinder 3 is started to lift the movable counterweight 4, and then the lifting cylinder 8 is started to raise the height of the counterweight mounting frame 7, which is then engaged with the movable counterweight 4, and then movably connected and separated from the counterweight lifting swing arm 2, and then the swing arm cylinder 3 is started again to lower the counterweight lifting swing arm 2 and move away from the movable counterweight 4;

[0052] By arranging the counterweight lifting swing arm 2 behind the crawler chassis 1 and hingedly connected to the crawler chassis 1, and then arranging the counterweight mounting frame 7 behind the turntable 6 and hingedly connected to the turntable 6, the swinging motion can be achieved by the lifting cylinder 8. By operating the counterweight lifting swing arm 2, the movable counterweight 4 can be installed on the counterweight mounting frame 7 or removed from the counterweight mounting frame 7 to the ground.

[0053] like Figure 1 and Figure 2 As shown, as a preferred embodiment of the present invention, a roller 9 is movably installed below the movable counterweight 4, a detachable armrest 10 is assembled behind the movable counterweight 4, and an armrest mounting pin 11 is provided between the detachable armrest 10 and the movable counterweight 4 for connection and fixation.

[0054] In an embodiment of the utility model, when in use, a roller 9 is movably installed under the movable counterweight 4, and a detachable armrest 10 is assembled behind the movable counterweight 4, so as to facilitate pushing the movable counterweight 4 to move, and an armrest mounting pin 11 is provided between the detachable armrest 10 and the movable counterweight 4, so that the detachable armrest 10 and the movable counterweight 4 can be connected, fixed and disassembled, thereby facilitating the use of the movable counterweight 4.

[0055] like Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, as a preferred embodiment of the present utility model, the front array of the movable counterweight 4 is provided with a mounting pin hole 12, the counterweight mounting frame 7 is provided with a cross bar 13, and is arranged in an array around the rotation center of the turntable 6, a counterweight mounting hole structure 14 is provided below the cross bar 13, and the end face of the counterweight lifting swing arm 2 is an L-shaped structure.

[0056] In an embodiment of the utility model, when in use, mounting pin holes 12 are provided in an array in front of the movable counterweight 4, thereby facilitating connection with the counterweight lifting swing arm 2 and the counterweight mounting frame 7 respectively. By providing a cross bar 13 on the counterweight mounting frame 7 and arranging it in an array around the rotation center of the turntable 6, a plurality of movable counterweights 4 can be carried and connected and fixed using a counterweight mounting hole structure 14 provided below the cross bar 13.

[0057] like Figure 2 、 Figure 3 and Figure 4 As shown, as a preferred embodiment of the present invention, the end face of the counterweight lifting swing arm 2 contacts the front end face and the lower end face of the movable counterweight 4, and a swing arm positioning pin 15 is provided at the connection between the counterweight lifting swing arm 2 and the lower mounting pin hole 12.

[0058] In an embodiment of the utility model, when in use, the end face of the counterweight lifting swing arm 2 is brought into contact with the front end face and the lower end face of the movable counterweight 4, so that the counterweight lifting swing arm 2 is aligned with the mounting pin hole 12 on the surface of the movable counterweight 4, and then the swing arm positioning pin 15 can be used to connect the counterweight lifting swing arm 2 with the mounting pin hole 12 below.

[0059] like Figure 3 、 Figure 4 and Figure 5 As shown, as a preferred embodiment of the present invention, a hook structure groove 16 is provided above the movable counterweight 4, the hook structure groove 16 is movably hooked with the cross bar 13, and a counterweight positioning pin 17 is provided between the counterweight mounting hole structure 14 and the upper mounting pin hole 12.

[0060] In an embodiment of the utility model, when in use, a hook structure groove 16 is provided above the movable counterweight 4 so that it can be movably hooked with the cross bar 13, and then a counterweight positioning pin 17 is provided between the counterweight mounting hole structure 14 and the upper mounting pin hole 12, so that the movable counterweight 4 can be carried on the counterweight mounting frame 7.

[0061] like Figure 3 As shown, as a preferred embodiment of the present invention, the swing arm positioning pin 15 passes through the counterweight lifting swing arm 2 and the mounting pin hole 12 below, so that the movable counterweight 4 in contact with the counterweight lifting swing arm 2 is connected and fixed.

[0062] In an embodiment of the utility model, when in use, the swing arm positioning pin 15 is passed through the counterweight lifting swing arm 2 and the mounting pin hole 12 below, so that the movable counterweight 4 in contact with the counterweight lifting swing arm 2 is connected and fixed, so that when the counterweight lifting swing arm 2 moves, it will drive the movable counterweight 4 to move.

[0063] like Figure 4 As shown, as a preferred embodiment of the present invention, the counterweight positioning pin 17 passes through the counterweight mounting hole structure 14 and the upper mounting pin hole 12, so that the counterweight mounting frame 7 is connected and fixed to the movable counterweight 4 moved upward.

[0064] In an embodiment of the utility model, when in use, the counterweight positioning pin 17 is passed through the counterweight mounting hole structure 14 and the mounting pin hole 12 above, so that the counterweight mounting frame 7 is connected and fixed to the movable counterweight 4 moved upward, thereby achieving the purpose of carrying the movable counterweight 4.

[0065] The above embodiment of the utility model provides a swing arm type counterweight self-loading and unloading mechanism. When in use, the counterweight lifting swing arm 2 is set behind the crawler chassis 1 and is hinged to the crawler chassis 1, so that the counterweight lifting swing arm 2 can be driven by the swing arm cylinder 3 to achieve swinging motion;

[0066] The counterweight mounting frame 7 is arranged at the rear of the turntable 6 and is hinged to the turntable 6 so that the swing motion can be achieved by the lifting cylinder 8. By operating the counterweight lifting swing arm 2, the movable counterweight 4 can be installed on the counterweight mounting frame 7 or removed from the counterweight mounting frame 7 to the ground;

[0067] The implementation process of counterweight self-loading and unloading

[0068] By cooperating with the detachable handrail 10 and the roller 9, the movable counterweight 4 can be brought close to the counterweight lifting swing arm 2 at the rear of the crawler chassis 1, so that the front end face and the lower end face of the movable counterweight 4 are in contact with the end face of the counterweight lifting swing arm 2, thereby forming a snap connection, and the counterweight lifting swing arm 2 is aligned with the mounting pin hole 12 below the movable counterweight 4, and then the swing arm locating pin 15 can be used to plug and fix the connection between the counterweight lifting swing arm 2 and the movable counterweight 4;

[0069] Subsequently, the detachable handrail 10 is removed from the movable counterweight 4, and then the swing arm cylinder 3 is operated to retract, so that the counterweight lifting swing arm 2 is swung upward, and the movable counterweight 4 is rotated and moved to the vicinity of the counterweight mounting frame 7, and the opening direction of the hook structure slot 16 provided above the movable counterweight 4 is aligned with the crossbar 13 on the counterweight mounting frame 7;

[0070] Next, the lifting cylinder 8 is started to retract, causing the counterweight mounting frame 7 to swing upward slightly, thereby allowing the crossbar 13 on the counterweight mounting frame 7 to enter the notch of the hook structure slot 16 of the movable counterweight 4, and aligning the mounting pin hole 12 above the movable counterweight 4 with the counterweight mounting hole structure 14 at the bottom of the crossbar 13. Subsequently, the counterweight locating pin 17 is inserted into the counterweight mounting hole structure 14 and the mounting pin hole 12 above, and then the counterweight locating pin 17 is used to fix the counterweight mounting frame 7 and the movable counterweight 4 together;

[0071] Then, the swing arm positioning pin 15 is removed, thereby separating the counterweight lifting swing arm 2 from the movable counterweight 4, and then the operating swing arm cylinder 3 is started to extend, so that the counterweight lifting swing arm 2 swings downward and then separates from the movable counterweight 4. At this time, the installation work of one movable counterweight 4 is completed;

[0072] When the movable counterweight 4 needs to be removed, the above steps can be reversed to remove the movable counterweight 4 from the counterweight mounting frame 7 to the ground.

[0073] When the number of movable counterweights 4 needs to be increased, a plurality of cross bars 13 and counterweight mounting hole structures 14 below the cross bars 13 can be provided on the counterweight mounting frame 7, and these cross bars 13 and counterweight mounting hole structures 14 are arranged in an array relative to the circumference of the rotation center of the turntable 6. Since the turntable 6 is connected to the crawler chassis 1 through the slewing mechanism 5, when the slewing mechanism 5 is operated, the turntable 6 can be rotated relative to the crawler chassis 1, and the turntable 6 is rotated by a small angle so that a cross bar 13 on the side of the counterweight mounting frame 7 is aligned with the counterweight lifting swing arm 2;

[0074] Then repeat the above steps to install the movable counterweight 4, and the movable counterweight 4 can be installed on the crossbar 13 on the side of the counterweight mounting frame 7 and fixed;

[0075] Thus, a plurality of movable counterweights 4 can be installed on the counterweight mounting frame 7 .

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A swing arm type counterweight self-loading and unloading mechanism, characterized in that: include; Track chassis (1); A counterweight lifting swing arm (2), wherein the counterweight lifting swing arm (2) is arranged at the rear of the crawler chassis (1) and is hinged to the crawler chassis (1); A swing arm oil cylinder (3), the swing arm oil cylinder (3) is arranged on the top of the rear of the crawler chassis (1) and is hinged to the counterweight lifting swing arm (2); A movable counterweight (4), the movable counterweight (4) being arranged behind the counterweight lifting swing arm (2) and being movably connected to the counterweight lifting swing arm (2); A slewing mechanism (5), the slewing mechanism (5) being arranged on the top in front of the crawler chassis (1); A turntable (6), the turntable (6) being arranged on top of the rotary mechanism (5); a counterweight mounting frame (7), the counterweight mounting frame (7) being arranged at the rear of the turntable (6) and being hinged to the turntable (6); A lifting cylinder (8), the lifting cylinder (8) is arranged at the rear of the top of the turntable (6) and is hinged to the counterweight mounting frame (7); The counterweight lifting swing arm (2), the swing arm oil cylinder (3), the movable counterweight (4), the rotary mechanism (5), the turntable (6), the counterweight mounting frame (7) and the lifting oil cylinder (8) constitute a swing arm type counterweight self-loading and unloading mechanism.

2. The swing arm type counterweight self-loading and unloading mechanism according to claim 1, characterized in that: A roller (9) is movably mounted below the movable counterweight (4), a detachable handrail (10) is mounted behind the movable counterweight (4), and a handrail mounting pin (11) is provided between the detachable handrail (10) and the movable counterweight (4) for connection and fixation.

3. The swing arm type counterweight self-loading and unloading mechanism according to claim 1, characterized in that: The front array of the movable counterweight (4) is provided with a mounting pin hole (12), the counterweight mounting frame (7) is provided with a cross bar (13), and is arranged in an array around the rotation center of the turntable (6), a counterweight mounting hole structure (14) is provided below the cross bar (13), and the end face of the counterweight lifting swing arm (2) is an L-shaped structure.

4. The swing arm type counterweight self-loading and unloading mechanism according to claim 3, characterized in that: The end face of the counterweight lifting swing arm (2) contacts the front end face and the lower end face of the movable counterweight (4), and a swing arm positioning pin (15) is provided at the connection between the counterweight lifting swing arm (2) and the lower mounting pin hole (12).

5. The swing arm type counterweight self-loading and unloading mechanism according to claim 3, characterized in that: A hook structure slot (16) is provided above the movable counterweight (4), the hook structure slot (16) is movably hooked with the crossbar (13), and a counterweight positioning pin (17) is provided between the counterweight mounting hole structure (14) and the upper mounting pin hole (12).

6. The swing arm type counterweight self-loading and unloading mechanism according to claim 4, characterized in that: The swing arm positioning pin (15) passes through the counterweight lifting swing arm (2) and the mounting pin hole (12) below, so that the counterweight lifting swing arm (2) and the movable counterweight (4) in contact therewith are connected and fixed.

7. The swing arm type counterweight self-loading and unloading mechanism according to claim 5, characterized in that: The counterweight positioning pin (17) penetrates the counterweight mounting hole structure (14) and the upper mounting pin hole (12), so that the counterweight mounting frame (7) is connected and fixed to the movable counterweight (4) moved upward.

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