Lifting mechanism capable of automatically adjusting counter weight

Abstract

The utility model discloses a lifting mechanism capable of automatically adjusting a counter weight, and belongs to the field of construction equipment. According to the lifting mechanism, a suspension arm is hinged to a rotary supporting platform, and vertical swing of the suspension arm is achieved through an amplitude modulation oil cylinder; the balance arm is formed by hinging one end of a first arm section and one end of a second arm section, the other end of the first arm section is hinged to the rotary supporting platform, and a weight used as a balance weight is fixed to the other end of the second arm section. The two ends of the push-pull oil cylinder are hinged to the first arm section and the rotary supporting platform respectively, and the pitch angle of the first arm section is changed through stretching and retracting of the push-pull oil cylinder. The two ends of the balance arm jacking oil cylinder are hinged to the first arm section and the second arm section respectively, and the opening angle between the first arm section and the second arm section is changed through stretching and retracting of the balance arm jacking oil cylinder. According to the lifting mechanism, the balance moment can be dynamically adjusted through matching of different oil cylinders, so that the balance bending moment of the lifting mechanism is dynamically adjusted, and the lifting weight of the lifting mechanism is increased.

Description

Technical Field

[0001] The utility model belongs to the field of construction equipment, and in particular relates to a lifting mechanism capable of automatically adjusting a counterweight. Background Art

[0002] In the construction field, lifting mechanisms are often needed to lift heavy objects. In order to meet the requirements of different working conditions such as equipment movement and lifting heavy objects, lifting mechanisms often need to be equipped with a balanced counterweight system to balance the bending moment. Conventional lifting mechanisms use fixed torque + loading and unloading counterweight blocks to balance the counterweight system. The loading and unloading of the counterweight blocks often requires the use of another lifting equipment, which has high construction costs. Moreover, when using a conventional balanced counterweight system, the counterweight needs to be adjusted when the lifting mechanism is in a non-working state, and it is impossible to dynamically adjust the counterweight when the lifting mechanism is in a working state, and the construction steps are cumbersome.

[0003] In the prior art, there are also counterweight methods that can be dynamically adjusted and do not require lifting equipment. For example, in the invention patent with application number CN201710437848.4, a construction crane with a water-injected weight-added balance arm is provided, including a construction crane body, a fixed stand at one end of the construction crane body, a rotating platform installed at the upper end of the fixed stand, a crossbeam arm connected and fixed at one end of the rotating platform, a balance arm connected and fixed at the other end of the rotating platform, a water-injected bucket, a water pump body and a weight-added weighing seat fixedly installed at the rear end of the balance arm, the water-injected bucket is arranged at the upper end of the weight-added weighing seat, the water pump body is arranged on one side of the water-injected bucket, a water outlet pipe and a water inlet pipe are arranged at one end of the water-injected bucket, a water guide pipe is connected between the water inlet pipe and the water outlet of the water pump body, and a water pump pipe is connected to the water inlet of the water pump body. This technical solution uses a water bucket as a counterweight mechanism, and realizes counterweight adjustment without the assistance of lifting equipment by water pump water injection. However, the specific gravity of water is relatively low, so to form the same counterweight as common metal or concrete counterweights requires a much larger volume, which is often difficult to use in practice.

[0004] Therefore, how to simply and reliably adjust the counterweight of the lifting mechanism is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the utility model is to solve the problem that conventional lifting mechanisms cannot achieve dynamic balance of bending moments in a working state, and to propose a lifting mechanism that can automatically adjust the balancing torque to ensure that the lifting mechanism can achieve overall dynamic balance of bending moments in a working state, thereby achieving efficient, safe and reliable construction.

[0006] The specific technical solutions adopted by this utility model are as follows:

[0007] A lifting mechanism capable of automatically adjusting counterweight comprises a boom, an amplitude modulation cylinder, a slewing support platform, a push-pull cylinder, a balancing arm, a weight and a balancing arm lifting cylinder; one end of the boom is hinged on the slewing support platform, and the other cantilevered end is used for lifting materials, the two ends of the amplitude modulation cylinder are respectively hinged on the boom and the slewing support platform, and the boom realizes vertical swing of the boom through the amplitude modulation cylinder; the balancing arm is hinged by one end of a first arm segment and one end of a second arm segment, the other end of the first arm segment is hinged on the slewing support platform, and the other end of the second arm segment is fixed with a weight used as a counterweight; the two ends of the balancing arm lifting cylinder are respectively hinged on the first arm segment and the slewing support platform, and the pitch angle of the first arm segment is changed by the extension and retraction of the balancing arm lifting cylinder; the two ends of the push-pull cylinder are respectively hinged on the first arm segment and the second arm segment, and the opening angle between the first arm segment and the second arm segment is changed by the extension and retraction of the push-pull cylinder.

[0008] Preferably, the rotation planes of the boom and the balance arm are perpendicular to the plane where the slewing support platform is located.

[0009] Preferably, the bottom of the slewing support platform is installed on the slewing support mechanism.

[0010] Preferably, the slewing support platform has a horizontal rotation range of -180° to +180° on the slewing support mechanism.

[0011] Preferably, the boom has a vertical pitch swing range of 0 to 80° on the slewing support platform.

[0012] Preferably, the boom itself has the freedom of telescopic adjustment along the arm length direction.

[0013] Preferably, the balancing arm is detachably connected to the slewing support platform, and the balancing arm has multiple groups of replaceable models.

[0014] Preferably, the weight is detachably connected to the second arm section of the balancing arm, and the weight has multiple groups of replaceable models.

[0015] Preferably, a hook is provided at the cantilevered end of the boom, and the hook is controlled by a traction mechanism through a traction rope.

[0016] Preferably, the amplitude modulation cylinder, the push-pull cylinder, and the balance arm lifting cylinder are each one or more.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model discloses a lifting mechanism which can automatically adjust the counterweight. The size of the balancing torque is dynamically adjusted by an oil cylinder to realize dynamic adjustment of the balancing bending moment of the lifting mechanism, thereby increasing the lifting weight of the lifting mechanism. The overall structure of the lifting mechanism is simple, the degree of automation is high, the construction steps are few, the construction is safe and reliable, time and labor are saved, and the effect is remarkable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a lifting mechanism capable of automatically adjusting the counterweight;

[0020] Figure 2 It is a schematic diagram of a lifting mechanism mainly based on a boom;

[0021] Figure 3 It is a schematic diagram of an amplitude modulation mechanism based on a balance arm;

[0022] The markings in the figure are: material 1, boom 2, amplitude modulation cylinder 3, slewing support platform 4, push-pull cylinder 5, balance arm 6, weight 7, balance arm lifting cylinder 8. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below. The technical features in each embodiment of the utility model can be combined accordingly without conflicting with each other.

[0024] In the description of the present utility model, it is necessary to understand that when an element is considered to be "connected" to another element, it can be directly connected to another element or indirectly connected, that is, there are intermediate elements. On the contrary, when an element is said to be "directly" connected to another element, there are no intermediate elements.

[0025] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0026] like Figure 1As shown, in a preferred embodiment of the utility model, a lifting mechanism capable of automatically adjusting the counterweight is provided, and its components include a boom 2, an amplitude modulation cylinder 3, a slewing support platform 4, a push-pull cylinder 5, a balance arm 6, a weight 7 and a balance arm lifting cylinder 8. Among them, except for the slewing support platform 4, the remaining components can be divided into two major parts: a lifting mechanism mainly based on the boom 2 and an amplitude modulation mechanism mainly based on the balance arm 6. The specific implementation forms of the above two parts of the mechanism are described in detail below.

[0027] In the embodiment of the utility model, the lifting mechanism is mainly composed of the boom 2, and its function is to suspend and lift the material 1 for transportation. This part is similar to the traditional crane and is realized by the boom 2 and the amplitude modulation cylinder 3. One end of the boom 2 is hinged on the slewing support platform 4, and the other cantilevered end is used to hoist the material 1. In the embodiment of the utility model, the boom 2 can be installed with a corresponding hook and a traction mechanism, and the hook is suspended at the end of the boom 2 by traction, and is controlled by the traction mechanism through a traction rope. The traction mechanism can be installed on the boom 2, and can be implemented by a winch and other equipment, which is not limited. In addition, the two ends of the amplitude modulation cylinder 3 are respectively hinged on the boom 2 and the slewing support platform 4, and the rotation plane of the boom 2 is perpendicular to the plane where the slewing support platform 4 is located, so that the boom 2 realizes the vertical swing of the boom through the amplitude modulation cylinder 3. When the amplitude modulation cylinder 3 is shortened, the boom 2 rotates to be close to the slewing support platform 4, and the pitch angle becomes smaller. When the amplitude modulation cylinder 3 is extended, the boom 2 rotates away from the slewing support platform 4, and the pitch angle becomes larger. In this way, different lifting functions can be achieved by coordinating the control of the material 1 by the hook and the traction mechanism. The boom 2 can also have the freedom of telescopic adjustment along the arm length direction, further realizing the lifting operation of the material 1 in the horizontal direction.

[0028] In the embodiment of the utility model, the balance arm 6 of the amplitude modulation mechanism is mainly composed of the balance arm 6, which adopts a two-section design and is formed by hingedly connecting one end of the first arm section and one end of the second arm section. The other end of the first arm section is hinged on the slewing support platform 4, and the other end of the second arm section is fixed with a weight 7 used as a counterweight. Similarly, the rotation plane of the balance arm 6 is perpendicular to the plane where the slewing support platform 4 is located. The counterweight adjustment function of the balance arm 6 in the utility model is achieved by changing the expansion amplitude of the first arm section and the second arm section by using the push-pull cylinder 5 and the balance arm lifting cylinder 8. Specifically, the two ends of the balance arm lifting cylinder 8 are respectively hinged on the first arm section and the slewing support platform 4, and the pitch angle of the first arm section is changed by the extension and contraction of the balance arm lifting cylinder 8. The two ends of the push-pull cylinder 5 are respectively hinged on the first arm section and the second arm section, and the opening angle between the first arm section and the second arm section is changed by the extension and contraction of the push-pull cylinder 5. Therefore, when the balance arm lifting cylinder 8 is shortened and the push-pull cylinder 5 is extended, the expansion range of the first arm section and the second arm section becomes larger, and then the balancing torque that the weight 7 can generate becomes larger; conversely, when the balance arm lifting cylinder 8 is extended and the push-pull cylinder 5 is shortened, the expansion range of the first arm section and the second arm section becomes smaller, and then the balancing torque that the weight 7 can generate becomes smaller. Therefore, the balance arm 6 can adjust the expansion range through the push-pull cylinder 5 and the balance arm lifting cylinder 8, and then realize the dynamic adjustment of the balancing torque. This process does not require the cooperation of external mechanisms, and its adjustment method is flexible and controllable, and can be coordinated according to the conditions of the materials 1 to be hoisted.

[0029] In addition, in other embodiments of the present invention, the balancing arm 6 and the slewing support platform 4 are preferably connected in a detachable manner, and the balancing arm 6 has a plurality of replaceable models, so that the balancing arm 6 can be replaced to meet the balancing torque requirements of different equipment models.

[0030] In addition, in other embodiments of the present invention, the weight 7 is preferably connected to the second arm section of the balance arm 6 in a detachable manner, and the weight 7 has multiple groups of replaceable models, so that the weight 7 can be replaced according to the size of the equipment model to match the corresponding lifting capacity. Moreover, the number of weights 7 installed on the second arm section can also be adjusted according to actual needs, so as to flexibly increase or decrease the counterweight according to construction needs.

[0031] In addition, in other embodiments of the present invention, in order to ensure the horizontal rotation flexibility of the entire lifting mechanism, the bottom of the entire slewing support platform 4 can be installed on the slewing support mechanism. The slewing support platform 4 is preferably able to have a horizontal rotation range of -180° to +180° on the slewing support mechanism, so that the entire lifting mechanism can perform hoisting operations in any horizontal direction.

[0032] In addition, the pitch swing amplitude of the boom 2 on the slewing support platform 4 can be set according to actual needs. In a preferred embodiment, it can be set to have a vertical pitch swing amplitude of 0 to 80° to meet most lifting operation requirements.

[0033] In addition, the size and material of each component in the above-mentioned lifting mechanism can be flexibly adjusted according to actual needs. In a preferred embodiment, the boom 2 can be set to extend the arm length to a maximum of 16m, the counterweight 7 weighs 4.5 tons, and the maximum lifting capacity is 7.3 tons.

[0034] In addition, it should be noted that in the above-mentioned lifting mechanism, the amplitude modulation cylinder 3, the push-pull cylinder 5, and the balance arm lifting cylinder 8 can be one or more according to actual needs. There is no limitation on this, as long as the corresponding functions are realized.

[0035] In summary, the utility model arranges a lifting cylinder and a push-pull cylinder at the balance arm of the lifting mechanism, which can automatically adjust the size of the balancing torque under working conditions, realize the overall bending moment balance of the lifting mechanism, increase the lifting weight of the lifting mechanism, and ensure safe and reliable construction. At the same time, it reduces construction steps, improves construction efficiency, and saves construction costs.

[0036] The above-described embodiment is only a preferred solution of the present invention, but it is not intended to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A lifting mechanism capable of automatically adjusting counterweight, characterized in that: The invention comprises a boom (2), an amplitude modulation cylinder (3), a slewing support platform (4), a push-pull cylinder (5), a balance arm (6), a weight (7) and a balance arm lifting cylinder (8); one end of the boom (2) is hinged on the slewing support platform (4), and the other cantilevered end is used for lifting materials (1); the two ends of the amplitude modulation cylinder (3) are respectively hinged on the boom (2) and the slewing support platform (4); the boom (2) realizes vertical swing of the boom through the amplitude modulation cylinder (3); the balance arm (6) is composed of one end of the first arm section and the other end of the second arm section. One end of the two arm sections is hinged, the other end of the first arm section is hinged on the slewing support platform (4), and the other end of the second arm section is fixed with a weight (7) used as a counterweight; the two ends of the balance arm lifting cylinder (8) are respectively hinged on the first arm section and the slewing support platform (4), and the pitch angle of the first arm section is changed by the extension and retraction of the balance arm lifting cylinder (8); the two ends of the push-pull cylinder (5) are respectively hinged on the first arm section and the second arm section, and the opening angle between the first arm section and the second arm section is changed by the extension and retraction of the push-pull cylinder (5).

2. The lifting mechanism capable of automatically adjusting the counterweight as claimed in claim 1, characterized in that: The rotation planes of the suspension arm (2) and the balance arm (6) are both perpendicular to the plane where the slewing support platform (4) is located.

3. The lifting mechanism capable of automatically adjusting the counterweight as claimed in claim 1, characterized in that: The bottom of the slewing support platform (4) is installed on the slewing support mechanism.

4. The lifting mechanism capable of automatically adjusting the counterweight as claimed in claim 1, characterized in that: The slewing support platform (4) has a horizontal rotation range of -180° to +180° on the slewing support mechanism.

5. The lifting mechanism capable of automatically adjusting the counterweight as claimed in claim 1, characterized in that: The boom (2) has a vertical pitch swing range of 0 to 80 degrees on the slewing support platform (4).

6. The lifting mechanism capable of automatically adjusting the counterweight as claimed in claim 1, characterized in that: The boom (2) itself has the freedom of telescopic adjustment along the arm length direction.

7. The lifting mechanism capable of automatically adjusting the counterweight as claimed in claim 1, characterized in that: The balancing arm (6) is detachably connected to the slewing support platform (4), and the balancing arm (6) has multiple groups of replaceable models.

8. The lifting mechanism capable of automatically adjusting the counterweight as claimed in claim 1, characterized in that: The weight (7) is detachably connected to the second arm section of the balancing arm (6), and the weight (7) has multiple groups of replaceable models.

9. The lifting mechanism capable of automatically adjusting the counterweight as claimed in claim 1, characterized in that: The cantilevered end of the boom (2) is provided with a hook, and the hook is controlled by a traction mechanism through a traction rope.

10. The lifting mechanism capable of automatically adjusting the counterweight as claimed in claim 1, characterized in that: The amplitude modulation cylinder (3), the push-pull cylinder (5), and the balance arm lifting cylinder (8) are each one or more.

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