Limiting and buffering structure for lifting of grab bucket of crane

Abstract

The utility model discloses a lifting limiting and buffering structure for a grab bucket of a crane, which comprises a limiting switch mounted on a trolley platform, and a buffering structure is further arranged on the trolley platform. The buffer structure comprises a supporting rod, a collision rod, a buffer spring, a plurality of guide wheels, an inhaul cable and an elastic sheet; the support rod is fixed on the trolley platform; the collision rod and the buffer spring are arranged on two sides of the support rod; a guide convex cylinder is arranged on the sinker bar, and the guide convex cylinder is arranged on the supporting rod in a sleeving manner; the guide wheels are arranged at the two ends of the supporting rod, the two ends of the inhaul cable are connected to the buffer spring and the collision rod respectively, and the middle of the inhaul cable is slidably arranged on the guide wheels. And the elastic sheet is arranged on the trolley platform. The limiting switch is reasonable in structural arrangement, the buffering spring is arranged and matched with the collision rod and the inhaul cable, the collision rod can drive the buffering spring to act through the inhaul cable after collision and slowly collides with the limiting switch, buffering can be effectively carried out, the limiting switch is effectively protected, applicability is high, and practicability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of crane ascending limit, and particularly relates to a crane grab ascending limit buffer structure. Background Technique

[0002] The bridge crane is a common hoisting equipment, which is widely used in industries such as chemical industry, electric power, machining and logistics. As a special equipment, the bridge crane generally includes relevant safety interlock structures such as door machine interlock and ascending limit. Most existing cranes use a weight type limit switch as the ascending limit structure. Although it can meet the use requirements in general cases, it has certain deficiencies. For example, when the bridge crane trolley is lifted too fast, the limit switch does not have a corresponding buffer structure, which is easy to cause damage to the limit switch, affecting the smoothness and service life of the limit switch, and its applicability and practicability are limited. Content of the Utility Model

[0003] The purpose of the utility model is to provide a crane grab ascending limit buffer structure with reasonable structure setting and beneficial to improving the use smoothness.

[0004] The technical solution to achieve the purpose of the utility model is a crane grab ascending limit buffer structure, which includes a limit switch installed on the trolley platform, and a buffer structure is also arranged on the trolley platform;

[0005] The buffer structure includes a support rod, a collision rod, a buffer spring, several guide wheels, a cable and a spring piece;

[0006] The support rod is fixed on the trolley platform, and the collision rod and the buffer spring are arranged on both sides of the support rod;

[0007] A guide convex cylinder is arranged on the collision rod, and the guide convex cylinder is sleeved on the support rod;

[0008] The guide wheels are arranged at both ends of the support rod, both ends of the cable are respectively connected to the buffer spring and the collision rod, and the middle part of the cable is slidably arranged on the guide wheels;

[0009] The spring piece is arranged on the trolley platform, and the spring piece is on the side of the limit switch.

[0010] Further preferably: limit protrusions are arranged at both ends of the support rod, and the guide convex cylinder is between the two limit protrusions.

[0011] Further preferably: the collision rod is guided by the support rod and the end part can be abutted against the limit switch.

[0012] Further preferably: the impact end of the collision rod is coated with a buffer pad.

[0013] More preferably, the cable is a metal cable body.

[0014] The utility model has positive effects: The structure of the utility model is reasonably arranged. It is provided with a buffer spring, which cooperates with the impact rod and the cable. After the impact rod is impacted, it will drive the buffer spring to act through the cable and slowly impact on the limit switch, which can effectively buffer and effectively protect the limit switch, is beneficial to improving the use stability and reliability, and has strong applicability and good practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the content of the utility model easier to be clearly understood, the following further details the utility model according to specific embodiments and in conjunction with the drawings, wherein:

[0016] Figure 1 is a structural schematic diagram of the utility model;

[0017] Figure 2 is a specific structural schematic diagram of the impact rod in the utility model.

[0018] Reference numerals: trolley platform 1, limit switch 2, buffer structure 3, support rod 31, impact rod 32, buffer spring 33, guide wheel 34, cable 35, elastic sheet 36, guide convex cylinder 4, limit protrusion 5, buffer pad 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the utility model.

[0020] Embodiment

[0021] See Figure 1 and Figure 2 As shown, a crane grab ascending limit buffer structure includes a limit switch 2 installed on a trolley platform 1, and a buffer structure 3 is further provided on the trolley platform; in this embodiment, the limit switch and the trolley platform are both conventional structures of the prior art, so they are not described in detail.

[0022] Meanwhile, in the actual application process, the buffer structure 3 includes a support rod 31, an impact rod 32, a buffer spring 33, a plurality of guide wheels 34, a cable 35 and an elastic sheet 36; in this embodiment, the cable is a metal cable body. The support rod is arranged parallel to the impact rod, and the length of the support rod is less than the length of the impact rod, so it will not affect the normal collision requirements.

[0023] And during installation, the support rod is fixed on the trolley platform, and the impact rod and the buffer spring are arranged on both sides of the support rod; a guiding convex cylinder 4 is arranged on the impact rod, and the guiding convex cylinder is sleeved on the support rod; the guiding wheels are arranged at both ends of the support rod, and both ends of the cable are respectively connected to the buffer spring and the impact rod, and the middle part of the cable is slidably arranged on the guiding wheels; the elastic sheet is arranged on the trolley platform, and the elastic sheet is on the side of the limit switch. The size of the guiding convex cylinder matches the size of the support rod. In order to prevent it from moving, the support rod is square, and the inner shape of the guiding convex cylinder is the same as the cross-sectional shape of the support rod.

[0024] During actual application, limit protrusions 5 are arranged at both ends of the support rod, and the guiding convex cylinder is between the two limit protrusions. The limit protrusions are mainly to prevent the guiding convex cylinder from falling off the support rod, improving the use stability and reliability.

[0025] In this embodiment, the impact rod is guided by the support rod and its end can abut against the limit switch. The impact end of the impact rod is coated with a buffer pad 6. The buffer pad is provided to protect the impact surface of the impact rod and improve the service life.

[0026] The utility model has positive effects: The structure of the utility model is reasonably arranged. It is provided with a buffer spring, which cooperates with the impact rod and the cable. After the impact rod is impacted, it will drive the buffer spring to act through the cable and slowly impact on the limit switch, which can effectively buffer and effectively protect the limit switch, is beneficial to improving the use stability and reliability, and has strong applicability and good practicability.

[0027] The standard parts used in this embodiment can be directly purchased from the market. For the non-standard structural components described in the specification, they can also be directly processed according to the existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt the mature conventional means in the existing technology, and the machines, parts and equipment all adopt the conventional models in the existing technology, so no specific description will be made here.

[0028] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, rather than limitations on the implementation manners of the utility model. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And these obvious changes or variations derived from the essential spirit of the utility model still belong to the protection scope of the utility model.

Claims

1. A lifting limit buffering structure for a crane grab, comprising a limit switch installed on a trolley platform, characterized in that: A buffer structure is also provided on the trolley platform; The buffer structure includes a support rod, a collision rod, a buffer spring, a plurality of guide wheels, a cable and a shrapnel; The support rod is fixed on the trolley platform, and the collision rod and the buffer spring are arranged on both sides of the support rod; A guide convex cylinder is arranged on the collision rod, and the guide convex cylinder is sleeved on the support rod; The guide wheels are arranged at both ends of the support rod, both ends of the cable are respectively connected to the buffer spring and the collision rod, and the middle part of the cable is slidably arranged on the guide wheels; The shrapnel is arranged on the trolley platform, and the shrapnel is on the side of the limit switch.

2. The lifting limit buffering structure of a crane grab according to claim 1, characterized in that: Limit protrusions are arranged at both ends of the support rod, and the guide convex cylinder is between the two limit protrusions.

3. The lifting limit buffer structure of a crane grab according to claim 2, characterized in that: The collision rod is guided by the support rod and the end can abut against the limit switch.

4. A lifting limit buffering structure for a crane grab according to claim 3, characterized in that: The impact end of the collision rod is coated with a buffer pad.

5. The lifting limit buffer structure of a crane grab according to claim 1, characterized in that: The cable is a metal cable body.

Images