Three-petal grab bucket with limiting structure

Abstract

The utility model belongs to the technical field of grab buckets, and particularly relates to a three-petal grab bucket with a limiting structure, which comprises a grab bucket main body, the limiting mechanism is arranged at the top end in the grab bucket main body, the limiting mechanism comprises a sleeve arranged at the top end of the inner side of the grab bucket main body, and the inner side of the sleeve is connected with an adjusting rod. According to the three-section grab bucket with the limiting structure, after a grab bucket body grabs materials, a driving motor in a sleeve is started, an output shaft of the driving motor rotates to drive a threaded rod to rotate, an adjusting rod at the outer end is driven to move downwards along the inner side of the sleeve, and meanwhile a connecting plate at the lower end moves downwards to enable a limiting plate to move downwards together; after a spring is compressed to a proper telescopic amount, the driving motor is closed, and at the moment, the limiting plate firmly presses and limits the materials in the grab bucket body to the interior of the grab bucket body; therefore, surface damage caused by collision due to shaking when the grab bucket main body moves can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of grab bucket technology, specifically a three-lobed grab bucket with a limiting structure. Background Technology

[0002] A grab bucket is a specialized tool used by cranes to grab dry bulk cargo. Based on shape, they can be divided into clam-shaped grab buckets and segmented grab buckets. The former consists of two complete buckets, while the latter consists of three or more jaw plates. During loading, the jaw plates close within the material pile, grabbing the material into the holding space. During unloading, the jaw plates open while suspended above the material pile, scattering the material onto the pile. The opening and closing of the jaw plates is generally controlled by the crane's hoisting mechanism via wire ropes. Grab bucket operations require minimal physical labor, achieve high loading and unloading efficiency, and ensure safety, making them a primary tool for handling dry bulk cargo in ports. Based on the type of cargo handled, they can be categorized into ore grab buckets, coal grab buckets, grain grab buckets, timber grab buckets, etc.

[0003] However, after the existing three-part grab grabs the material, during the process of moving the three-part grab grab, the material will collide with each other due to the shaking of the three-part grab grab, which may cause damage to the material due to the collision.

[0004] Therefore, we urgently need to provide a three-lobed grab bucket with a limiting structure that can limit the material in the three-lobed grab bucket. Utility Model Content

[0005] The purpose of this utility model is to provide a three-lobed grab bucket with a limiting structure to solve the problem mentioned in the background art, where the materials in the three-lobed grab bucket will collide with each other due to the shaking of the three-lobed grab bucket, resulting in damage to the materials due to the collision.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a three-lobed grab bucket with a limiting structure, comprising a grab bucket body, wherein a limiting mechanism is provided at the top of the inner part of the grab bucket body.

[0007] The limiting mechanism includes a sleeve installed at the top inner side of the grab bucket body. An adjusting rod is connected to the inner side of the sleeve. Limiting blocks are fixedly connected to the left and right ends of the upper outer side of the adjusting rod. A drive motor is installed at the top inner side of the sleeve. A threaded rod is fixedly connected to the lower end of the output shaft of the drive motor. A fixing ring is fixedly connected to the lower side of the sleeve. A connecting plate is fixedly connected to the lower end of the adjusting rod. A spring is fixedly connected to the lower side of the connecting plate. A mounting plate is fixedly connected to the lower end of the spring. A limiting plate is connected to the lower end of the mounting plate. A disassembly unit is provided at the upper end of the sleeve.

[0008] A further improvement is that the disassembly and assembly unit includes a connecting screw fixedly connected to the upper side of the sleeve, and a nut is threaded onto the outer side of the connecting screw.

[0009] A further improvement is that vertical grooves are provided at both ends of the inner side of the sleeve. The inner side of the sleeve is slidably connected to the outer side of the adjusting rod, and the outer side of the limiting block is slidably connected to the inner side of the groove. Thus, when the adjusting rod slides along the inner side of the sleeve, the limiting block on its outer side will slide along the inner side of the groove.

[0010] A further improvement is that an upward-facing threaded groove is provided in the middle of the inner part of the adjusting rod, and the outer side of the threaded rod is threadedly connected to the inner side of the threaded groove. Thus, when the output shaft of the drive motor is started and rotates, causing the threaded rod to rotate, the adjusting rod can be moved to the outer side of the threaded rod.

[0011] A further improvement is that the upper left and right ends of the fixed ring abut against the lower side of the limiting block, so that when the limiting block moves down along the inner side of the slide groove, it will eventually contact the upper left and right ends of the fixed ring.

[0012] A further improvement is that the mounting plate has a vertical mounting hole inside, the outer side of the connecting screw is slidably connected to the inner side of the mounting hole, and the lower side of the nut abuts against the upper side of the mounting plate. Thus, when the limiting plate is placed on the lower side of the mounting plate, and the connecting screw on its upper side passes through the mounting hole, the nut is then threaded to the outer side of the connecting screw until the nut moves to contact the upper side of the mounting plate, allowing the limiting plate to be installed on the lower side of the mounting plate.

[0013] A further improvement is that there are four springs, which are fixed in an array at the four corners of the adjacent side of the connecting plate and the mounting plate, so that the pressure of the material pressed down by the limiting plate can be changed by adjusting the amount of spring compression.

[0014] In summary, this application discloses a three-lobed grab bucket with a limiting structure.

[0015] In this technical solution, after the grab bucket body grabs the material, the drive motor in the sleeve is started, and its output shaft rotates to drive the threaded rod to rotate, which drives the adjusting rod at the outer end to move down along the inner side of the sleeve. At the same time, the lower limit plate moves down together until the limit plate contacts the upper end of the material grabbed in the grab bucket body. This can press the material into the interior of the grab bucket body, ensuring that when the material in the grab bucket body is transferred, the material will not be damaged due to collision caused by shaking.

[0016] Furthermore, by placing the limiting plate under the mounting plate, with the connecting screw on its upper side passing through the mounting hole, and then threading the nut onto the outside of the connecting screw until the nut moves to contact the upper side of the mounting plate, the limiting plate can be installed on the lower side of the mounting plate. This allows the limiting plate under the mounting plate to be disassembled and replaced when different sizes of limiting plates are needed to limit the material in the grab bucket body. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the limiting mechanism of this utility model;

[0019] Figure 3 This is a cross-sectional view of the sleeve and adjusting rod of this utility model;

[0020] Figure 4 This is a schematic diagram of the connection between the mounting plate and the limiting plate of this utility model.

[0021] In the diagram: 1. Grab bucket body; 201. Sleeve; 202. Adjusting rod; 203. Limiting block; 204. Drive motor; 205. Threaded rod; 206. Fixing ring; 207. Connecting plate; 208. Spring; 209. Mounting plate; 210. Limiting plate; 301. Connecting screw; 302. Nut. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 This utility model provides a technical solution: a three-lobed grab bucket with a limiting structure, including a grab bucket body 1, and a limiting mechanism is provided at the top of the inside of the grab bucket body 1.

[0024] The limiting mechanism includes a sleeve 201 installed at the top inner side of the grab body 1. An adjusting rod 202 is connected to the inner side of the sleeve 201. Limiting blocks 203 are fixedly connected to the left and right ends of the upper outer side of the adjusting rod 202. Vertical sliding grooves are opened at the left and right ends of the inner side of the sleeve 201. The inner side of the sleeve 201 is slidably connected to the outer side of the adjusting rod 202, and the outer side of the limiting block 203 is slidably connected to the inner side of the sliding groove. Thus, when the adjusting rod 202 slides along the inner side of the sleeve 201, the limiting block 203 on its outer side will slide along the inner side of the sliding groove, thereby making the adjusting rod 202 slide along the inner side of the sleeve 201 until it cannot rotate.

[0025] A drive motor 204 is installed on the inner top of the sleeve 201. A threaded rod 205 is fixedly connected to the lower end of the output shaft of the drive motor 204. A threaded groove with the slot facing upward is opened in the middle of the inner part of the adjusting rod 202. The outer side of the threaded rod 205 is threadedly connected to the inner side of the threaded groove. Thus, when the drive motor 204 is started and its output shaft rotates, driving the threaded rod 205 to rotate, the adjusting rod 202 can be moved to the outside of the threaded rod 205.

[0026] A fixing ring 206 is fixedly connected to the lower side of the sleeve 201. A connecting plate 207 is fixedly connected to the lower end of the adjusting rod 202. A spring 208 is fixedly connected to the lower side of the connecting plate 207. A mounting plate 209 is fixedly connected to the lower end of the spring 208. A limit plate 210 is connected to the lower end of the mounting plate 209. The upper left and right ends of the fixing ring 206 abut against the lower side of the limit block 203. When the limit block 203 moves down along the inner side of the slide groove, it will eventually contact the upper left and right ends of the fixing ring 206, so that the limit block 203 will not move down out of the slide groove, thereby ensuring that the adjusting rod 202 will not move out from the inner side of the sleeve 201.

[0027] The upper end of the sleeve 201 is provided with a disassembly and assembly unit, which includes a connecting screw 301 fixedly connected to the upper side of the sleeve 201. A nut 302 is threadedly connected to the outer side of the connecting screw 301. A vertical mounting hole is opened inside the mounting plate 209. The outer side of the connecting screw 301 is slidably connected to the inner side of the mounting hole. The lower side of the nut 302 abuts against the upper side of the mounting plate 209, so that when the limiting plate 210 is placed on the lower side of the mounting plate 209, the connecting screw on its upper side... After 301 passes through the mounting hole, the nut 302 is threaded to the outside of the connecting screw 301 until the nut 302 moves to the upper side of the mounting plate 209, so that the limiting plate 210 can be installed on the lower side of the mounting plate 209. This allows the limiting plate 210 under the mounting plate 209 to be disassembled and replaced when different sizes of limiting plates 210 are needed to limit the material in the grab bucket body 1.

[0028] There are four springs 208, which are fixed in an array at the four corners of the adjacent side of the connecting plate 207 and the mounting plate 209. After the mounting plate 209 moves down to the upper end of the material in the grab bucket body 1, the connecting plate 207 continues to move down, which will compress the springs 208. By adjusting the amount of compression of the springs 208, the pressure of the limiting plate 210 pressing down on the material can be changed. In this way, the extension and retraction of the springs 208 can be adjusted according to the optimal pressure that the material can withstand, so as to avoid the material grabbed in the grab bucket body 1 being squeezed and damaged when the material is grabbed and transferred.

[0029] Working principle: After the grab bucket body 1 grabs the material, the drive motor 204 in the sleeve 201 is started. Its output shaft rotates, driving the threaded rod 205 to rotate, which in turn drives the adjusting rod 202 at the outer end to move down along the inner side of the sleeve 201. At the same time, the connecting plate 207 at the lower end moves down, causing the limiting plate 210 to move down as well, until the limiting plate 210 contacts the upper end of the material being grabbed in the grab bucket body 1. Then, the spring 208 is compressed to a suitable extension and retraction amount, and the drive motor 204 is turned off. At this time, the limiting plate 210 firmly presses and restricts the material in the grab bucket body 1 to the inside of the grab bucket body 1, so that the material will not collide due to shaking when the grab bucket body 1 moves, causing damage to the surface.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A three-lobed grab bucket with a limiting structure, comprising a grab bucket body (1), characterized in that: A limit mechanism is provided at the top of the inside of the grab bucket body (1); The limiting mechanism includes a sleeve (201) installed on the inner top of the grab body (1). An adjusting rod (202) is connected to the inner side of the sleeve (201). Limiting blocks (203) are fixedly connected to the left and right ends of the upper outer side of the adjusting rod (202). A drive motor (204) is installed on the inner top of the sleeve (201). A threaded rod (205) is fixedly connected to the lower end of the output shaft of the drive motor (204). A fixing ring (206) is fixedly connected to the lower side of the sleeve (201). A connecting plate (207) is fixedly connected to the lower end of the adjusting rod (202). A spring (208) is fixedly connected to the lower side of the connecting plate (207). An mounting plate (209) is fixedly connected to the lower end of the spring (208). A limiting plate (210) is connected to the lower end of the mounting plate (209). A disassembly unit is provided on the upper end of the sleeve (201).

2. A three-lobed grab bucket with a limiting structure according to claim 1, characterized in that: The disassembly and assembly unit includes a connecting screw (301) fixedly connected to the upper side of the sleeve (201), and a nut (302) is threaded onto the outer side of the connecting screw (301).

3. A three-lobed grab bucket with a limiting structure according to claim 1, characterized in that: Vertical grooves are provided at the left and right ends of the inner side of the sleeve (201). The inner side of the sleeve (201) is slidably connected to the outer side of the adjusting rod (202), and the outer side of the limiting block (203) is slidably connected to the inner side of the groove.

4. A three-lobed grab bucket with a limiting structure according to claim 1, characterized in that: The adjusting rod (202) has an upward-facing threaded groove in the middle of its interior, and the outer side of the threaded rod (205) is threadedly connected to the inner side of the threaded groove.

5. A three-lobed grab bucket with a limiting structure according to claim 1, characterized in that: The upper left and right ends of the fixed ring (206) abut against the lower side of the limiting block (203).

6. A three-lobed grab bucket with a limiting structure according to claim 2, characterized in that: The mounting plate (209) has a vertical mounting hole inside. The outer side of the connecting screw (301) is slidably connected to the inner side of the mounting hole, and the lower side of the nut (302) abuts against the upper side of the mounting plate (209).

7. A three-lobed grab bucket with a limiting structure according to claim 1, characterized in that: There are four springs (208), which are fixed in an array to the four corners of the adjacent side of the connecting plate (207) and the mounting plate (209).

Images