Deflectable internal expanding clamp

Abstract

The utility model discloses a deflectable internal expanding type clamp. The deflectable internal expanding type clamp comprises an expanding unit, a rotating unit and a buffering unit, the expansion unit is connected with the rotation unit, the buffering unit is arranged on the expansion unit and the rotation unit, the buffering unit can provide buffering for the expansion unit when the expansion unit is unfolded, and the expansion unit comprises an expansion unit support, a pulley, an expansion plate, a connecting rod, a connecting rod sliding block and a push rod oil cylinder. A plurality of limiting plates are uniformly arranged at the second end of the expansion unit stent; and the pulley is arranged on the limiting plate. The tail end of the device is connected with a bucket rod of a grabbing machine movable arm, the whole structure is compact, the variable diameter range is large, and the device is matched with a series mechanical arm of a grabbing machine to meet the requirements of vertical grabbing, vertical placing and rolling placing in the loading and unloading process of hollow metal rod rolls.

Description

Technical Field

[0001] This utility model belongs to the technical field of hollow metal rod coil clamps, specifically a deflectable internal tension clamp. Background Technology

[0002] Traditional metal rod coil clamps employ external or semi-external clamping methods, occupying external space and resulting in larger gaps between adjacent coils, thus limiting their application. Furthermore, when retrieving coils from the warehouse, they are prone to detaching from the clamps. Traditional clamps cannot perform vertical gripping, vertical placement, or rolling of hollow metal rod coils, further limiting their applicability and hindering their ability to achieve the desired outcome. Therefore, clamps with multiple degrees of freedom are required.

[0003] In patent document CN208483752U, a metal tube clamp includes a connecting part connected to a drive motor and a limiting part connecting to a metal tube. Multiple limiting blocks are used to tighten or loosen the metal tube as the connecting part rotates, facilitating rapid processing. At the same time, the use of conical limiting posts at the ends helps to clamp the metal tube and prevent it from moving. However, its structure occupies a large space and cannot meet the requirements for clamping adjacent metal rods.

[0004] In patent document CN217833405U, a metal pipe clamp with good shock absorption effect, under the action of the sealing ring, when vibration occurs at the top plate of the metal pipe clamp, the telescopic sleeve moves inward, the spring is compressed, the air pressure inside the telescopic sleeve increases, and the air pressure is slowly released through the air outlet, playing a certain buffering role and enabling the metal pipe clamp to achieve shock absorption. However, its structure can only achieve horizontal gripping of metal pipes, not vertical gripping, and can only grip from the bottom of the metal pipe, and cannot clamp adjacent metal rods.

[0005] In patent document CN219026653U, an internally tensioned clamp includes a support base, a clamping screw, a moving block, a tensioning plate, and a contraction groove. When clamping coal shells, a transmission mechanism drives the clamping mechanism to move, causing the clamping plate to move away from the tensioning plate. Then, the clamping screw rotates, causing the two moving blocks to move away from each other, simultaneously achieving pressure measurement, inner diameter measurement, and fixed clamping, forming a motor-controlled double internally tensioned detection clamp. However, its structure can only achieve horizontal gripping of objects.

[0006] In summary, most existing metal pipe clamps do not have multiple clamping methods for metal pipes, and most external and semi-external clamping methods cannot clamp adjacent metal pipes in most clamping operations. Therefore, it is necessary to design a deflectable internal clamp to solve the above problems. Utility Model Content

[0007] The purpose of this utility model is to provide a deflectable internal tension clamp to solve the problem of large space occupation of the clamp structure in the prior art. Moreover, this utility model can realize the vertical gripping, vertical placement and rolling of hollow metal rod coils through the expansion unit, rotation unit and buffer unit.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a deflectable inward-expanding clamp, comprising an expansion unit, a rotation unit, and a buffer unit; the expansion unit is connected to the rotation unit, and the buffer unit is disposed between the expansion unit and the rotation unit, providing buffering when the expansion unit unfolds; the expansion unit includes an expansion unit bracket, a pulley, an expansion plate, a connecting rod, a connecting rod slider, and a push rod cylinder; a hollow tube is provided at the first end of the expansion unit bracket, and multiple limiting plates are evenly distributed at the second end of the expansion unit bracket; the pulley is disposed on the limiting plate; one end of the expansion plate is connected to the pulley, and the sidewall of the expansion plate is connected to the first side of the connecting rod slider via the connecting rod; the connecting rod slider... The second side of the block is connected to the movable end of the push rod cylinder, and the connecting rod slider can slide on the side wall of the hollow tube; the push rod cylinder is located inside the hollow tube; the buffer unit includes a shock absorber and a buffer plate, the first end of the shock absorber is connected to the first end of the buffer plate, the second end of the shock absorber is connected to the rotary unit bracket, and the second end of the buffer plate is connected to the expansion unit bracket; the rotary unit includes a rotary unit bracket, a deflection cylinder, and a deflection bracket, the first end of the rotary unit bracket is connected to the expansion unit bracket, the second end of the rotary unit bracket is movably connected to the first end of the deflection bracket, the second end of the deflection bracket is connected to the material handling arm, and the deflection cylinder is located between the rotary unit bracket and the deflection bracket.

[0009] Preferably, a limiting plate groove is provided on the limiting plate, and the pulley is set in the limiting plate groove; multiple connecting rod slider rectangular grooves and pin supports are evenly provided on the side wall of the hollow tube, the connecting rod slider is set on the connecting rod slider rectangular groove, and the second end of the buffer plate is connected to the pin support through a pin.

[0010] Preferably, the ends and side walls of the expansion plate are provided with multiple pin holes for connecting pulleys and connecting rods.

[0011] Preferably, the outer wall of the connecting rod slider is provided with multiple protrusions, and the connecting rod slider is disposed in the rectangular groove of the connecting rod slider through the protrusions.

[0012] Preferably, the rotary unit support is provided with a rotary unit pin support, and the second end of the shock absorber is connected to the rotary unit pin support.

[0013] Preferably, the first end of the deflection bracket is provided with a through hole, and the second end of the deflection bracket is provided with multiple pin holes. The first end of the deflection bracket is connected to the rotary unit bracket through the through hole and the bearing, and the second end of the deflection bracket is connected to the stick of the grabbing boom through the pin holes.

[0014] Preferably, the shock absorbers and buffer plates are symmetrically arranged on both sides of the expansion unit support and the rotary unit support.

[0015] Preferably, the slewing unit further includes a bearing end cover and a bearing. Bearings are provided at the connection points between the two ends of the deflection cylinder and the slewing unit bracket and the deflection bracket. A bearing end cover is provided on the outward side of the bearing.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) This utility model provides a deflectable internal tension clamp. In the expansion unit, the push rod cylinder drives the connecting rod slider to move, thereby causing the connecting rod to move, so that one end of the expansion plate moves away from the expansion unit support, thus satisfying the clamping conditions for the pipe. When the push rod cylinder drives the expansion plate to move in the opposite direction, the expansion plate will fit tightly with the expansion unit support, so that the volume after shrinkage is as small as possible, thereby realizing the clamping of pipes of various diameters. At the same time, this utility model can save space to a greater extent by incorporating the push rod cylinder and adopting an internal tension mechanism.

[0018] (2) One end of the rotary unit of this utility model is connected to the boom stick of the grabbing machine. Together with the series mechanical arm of the grabbing machine, it can meet the requirements of vertical grabbing, vertical placement and rolling of the hollow metal rod coil loading and unloading process. The bearing connection of the rotary unit is provided with a gap to ensure that the force is transmitted from the rotary unit bracket to the bearing and then to the deflection bracket, so as to protect the deflection cylinder. In addition, the rotary unit can provide additional degrees of freedom to facilitate the loading of the rod coil in a narrow range.

[0019] (3) The buffer unit of this utility model consists of a shock absorber and a buffer plate. During the process of clamping the metal rod roll, the buffer plate will contact the rod roll before the limiting plate. The rigid contact between the rod roll and the limiting plate can be avoided during the collision process by the partial spring compression of the shock absorber. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the deflectable internal tension clamp of this utility model after expansion.

[0021] Figure 2 This is a schematic diagram of the overall structure of the deflectable internal tension clamp of this utility model after it is closed.

[0022] Figure 3 This is a schematic diagram of the expansion unit structure of the deflectable internal clamp of this utility model;

[0023] Figure 4 This is a schematic diagram of the expansion unit support structure of the deflectable inward-stretching clamp of this utility model.

[0024] Figure 5 This is a schematic diagram of the expansion plate structure of the deflectable internal tension clamp of this utility model.

[0025] Figure 6 This is a schematic diagram of the rotating unit structure of the deflectable internal tension clamp of this utility model;

[0026] Figure 7 This is a schematic diagram of the buffer unit structure of the deflectable internal tension clamp of this utility model.

[0027] The diagram shows the following markings: Expansion unit 1; Expansion unit bracket 11; Limiting plate 111; Hollow tube 112; Pulley 12; Expansion plate 13; Sharpening 131; Protrusion 132; Connecting rod 14; Connecting rod slider 15; Push rod cylinder 16; Limiting plate groove 17; Connecting rod slider rectangular groove 18; Expansion unit pin support 19; Buffer unit 2; Shock absorber 21; Buffer plate 22; Rotation unit 3; Rotation unit bracket 31; Bearing end cover 32; Bearing 33; Deflection cylinder 34; Deflection bracket 35; Deflection bracket pin hole 36; Rotation unit pin support 37. Detailed Implementation

[0028] 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 scope of protection of the present utility model.

[0029] This utility model provides a deflectable inward-stretching clamp, such as Figures 1 to 5 As shown, it includes an expansion unit 1, a buffer unit 2, and a slewing unit 3. The expansion unit 1 is welded to the slewing unit support 31 on the slewing unit 3 via an expansion unit support 11. The shock absorber 21 is connected to the slewing unit support 31 via a pin. The deflection support 35 is connected to the boom stick of the grabber via a deflection support pin hole.

[0030] The expansion unit bracket 1 is provided with four arrayed limiting plates 111, each with a limiting plate groove 17. The ends of the expansion plates 13 are mounted on the limiting plate grooves 17 via pulleys 12 and can slide up and down within the grooves. The inner side of the expansion plates 13 and both ends of the connecting rods are provided with pin holes. The connecting rods 14 are arranged in parallel to form a parallel four-bar linkage and are connected to the expansion plates 13 and the connecting rod sliders 15 via pins, and are arrayed around the hollow tube 112. The hollow tube 112 is provided with a rectangular groove 18 for the connecting rod sliders 15, in which the connecting rod sliders 15 can slide axially. A push rod cylinder 16 is provided inside the hollow tube to reduce the overall length of the clamp and facilitate the loading of the rod coil. When the clamp picks up the metal rod coil, the push rod cylinder 16 drives the connecting rod sliders 15 to slide axially. Due to the presence of the limiting plates 111, the connecting rods 14 can only move relative to the hollow tube during the movement of the expansion plates 13. The radial movement of tube 112 enables expansion and contraction during the clamping process. In the merged state, it can be inserted into and withdrawn from the center of the hollow metal rod roll. In the expanded state, it can smoothly grip the hollow metal rod roll. The overall curvature of the expansion plate 13 is consistent with the inner diameter of the rod roll, and one end of the expansion plate 13 is provided with a sharpened point 131 to facilitate the gripping and release of the metal rod roll. At the same time, the front end of the expansion plate 13 is provided with a 5mm protrusion 132 to prevent the metal rod roll from falling. The outside can be wrapped with a nylon plate to prevent damage to the rod roll during the gripping process. The boom of the material handling machine moves the device so that the expansion unit is inserted into the hollow metal rod roll. At this time, the expansion unit expands outward to clamp the inner wall of the hollow metal rod roll. Then, the rotation unit rotates to realize the vertical gripping, vertical placement, and rolling of the hollow metal rod roll and realize the transportation. After being transported to the target point, the clamp retracts to realize the clamp withdrawing from the hollow metal rod roll.

[0031] The expansion plate 13 is designed with an overall curvature that is consistent with the inner diameter of the rod coil to facilitate surface contact. The expansion plate 13 is wedge-shaped with a protrusion at the end to prevent the rod coil from falling off. The front end is sharpened to facilitate the insertion of the clamp. The expansion plate 13 is completely wrapped with a nylon plate to prevent damage to the rod coil during clamping.

[0032] like Figure 6 As shown, one end of the slewing unit support 31 is provided with a rib to improve the structural strength, and the other end is provided with symmetrical through holes. The bearing end cover 32 and the bearing 33 are symmetrically arranged on the slewing unit support 31. The deflection cylinder 34 is set inside the slewing unit support 31 and is connected to the deflection support 35 by bolts. One end of the deflection support 35 is provided with four deflection support pin holes 36, which are connected to the boom stick of the grabber through pin shafts, so that the clamp can be adjusted to work perpendicular to the ground or parallel to the ground at any position of the boom stick. There is a gap between the slewing unit support 31, the bearing end cover 32 and the deflection support 35. All the weight is borne by the bearing, thus protecting the deflection cylinder 34. When the clamp is working, the deflection cylinder 34 drives the slewing unit support 31 to deflect, thereby driving the clamp to deflect, realizing the vertical grabbing, vertical placement and rolling of the metal rod coil.

[0033] like Figure 7 As shown, the buffer unit 2 includes a shock absorber 21 and a buffer plate 22. The shock absorber 21 and the buffer plate 22 are provided with pin holes at both ends. They are connected to the rotary unit pin support 37 of the rotary unit bracket 31 and the expansion unit pin support 19 of the expansion unit bracket 11 through pin shafts, and are symmetrically arranged on both sides of the hollow tube 112. When the clamp picks up the metal rod coil, the metal rod coil contacts the buffer plate 22 first. The force on the buffer plate 22 is transmitted to the shock absorber 21. The spring compression of the shock absorber 21 can prevent the metal rod coil from rigidly contacting the limiting plate 111.

[0034] This utility model provides a deflectable inward-stretching clamp, such as Figures 1 to 5 As shown, it includes an expansion unit 1, a buffer unit 2, and a rotation unit 3. When clamping the metal rod coil, the metal rod coil is upright on the ground, and the expansion plate 13 is in a retracted state. It is clamped by inserting into the center of the metal rod coil. During the insertion process, the metal rod coil contacts the buffer plate 22 first. After the metal rod coil is inserted, the push rod cylinder 16 drives the connecting rod slider 15 to move axially relative to the hollow tube 112. The force and displacement are transmitted to the expansion plate 13 through the connecting rod 14. Since the limiting plate 111 is provided with a limiting plate... The slide 17 allows the expansion plate 13 to move radially relative to the hollow tube 112. The front end of the expansion plate 13 is provided with a protrusion 132 to prevent the metal rod coil from falling during the clamping process. After the clamp is clamped, the boom stick of the grabber drives the clamp to the designated position. The deflection cylinder 34 drives the slewing unit bracket 31 to deflect the clamp. After reaching the target point, the push rod cylinder 16 drives the clamp to retract, causing the clamp to exit the hollow metal rod coil, thereby realizing the clamp to place the metal rod coil upright or roll it, completing the clamping process.

[0035] Working principle: When using this internal tensioning fixture, firstly, according to... Figures 1-7 As shown, this internal tension clamp can achieve various behaviors such as upright and flat placement when clamping metal rod coils. The clamp provides power to the expansion unit through a push rod cylinder to realize the expansion and contraction of the expansion plate. The built-in push rod cylinder reduces the overall structure and can clamp adjacent metal rod coils. The clamp provides power to the rotation unit through a rotary cylinder to realize the rotation of the rotation unit. In addition, the clamp's buffer unit can prevent the metal rod coil from rigidly contacting the expansion unit support, thereby protecting the clamp. The contents not described in detail in this specification are prior art known to those skilled in the art.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A deflectable inward-expanding clamp, comprising an expansion unit, a rotation unit, and a buffer unit; the expansion unit is connected to the rotation unit, and the buffer unit is disposed between the expansion unit and the rotation unit, the buffer unit providing cushioning when the expansion unit expands, characterized in that: The expansion unit includes an expansion unit bracket, pulleys, an expansion plate, a connecting rod, a connecting rod slider, and a push rod cylinder. A hollow tube is provided at the first end of the expansion unit bracket, and multiple limiting plates are evenly distributed at the second end of the expansion unit bracket. The pulley is mounted on the limiting plate. One end of the expansion plate is connected to the pulley, and the sidewall of the expansion plate is connected to the first side of the connecting rod slider via the connecting rod. The second side of the connecting rod slider is connected to the movable end of the push rod cylinder, and the connecting rod slider can slide on the sidewall of the hollow tube. The push rod cylinder is located inside the hollow tube; The buffer unit includes a shock absorber and a buffer plate. The first end of the shock absorber is connected to the first end of the buffer plate, the second end of the shock absorber is connected to the rotary unit bracket, and the second end of the buffer plate is connected to the expansion unit bracket. The rotary unit includes a rotary unit support, a deflection cylinder, and a deflection bracket. The first end of the rotary unit support is connected to the expansion unit support, the second end of the rotary unit support is movably connected to the first end of the deflection bracket, the second end of the deflection bracket is connected to the material handling arm, and the deflection cylinder is located between the rotary unit support and the deflection bracket.

2. The deflectable, internally clamping gripper of claim 1, wherein: A limit plate groove is provided on the limit plate, and the pulley is set in the limit plate groove; multiple connecting rod slider rectangular grooves and pin supports are evenly provided on the side wall of the hollow tube, the connecting rod slider is set on the connecting rod slider rectangular groove, and the second end of the buffer plate is connected to the pin support through a pin.

3. The deflectable, internally threaded clamp of claim 1, wherein: The expansion plate has multiple pin holes on its ends and side walls for connecting to pulleys and connecting rods.

4. The deflectable, internally threaded clamp of claim 1, wherein: The outer wall of the connecting rod slider is provided with multiple protrusions, and the connecting rod slider is positioned in the rectangular groove of the connecting rod slider through the protrusions.

5. The deflectable, internally threaded clamp of claim 1, wherein: The slewing unit support is equipped with a slewing unit pin support, and the second end of the shock absorber is connected to the slewing unit pin support.

6. The deflectable, internally threaded clamp of claim 1, wherein: The first end of the deflection bracket is provided with a through hole, and the second end of the deflection bracket is provided with multiple pin holes. The first end of the deflection bracket is connected to the rotary unit bracket through the through hole and the bearing, and the second end of the deflection bracket is connected to the stick of the grabbing boom through the pin holes.

7. The deflectable, internally threaded clamp of claim 1, wherein: Shock absorbers and buffer plates are symmetrically arranged on both sides of the expansion unit support and the rotary unit support.

8. The deflectable, internally threaded clamp of claim 1, wherein: The slewing unit also includes bearing end caps and bearings. Bearings are provided at the connection points between the two ends of the deflection cylinder and the slewing unit bracket and the deflection bracket. Bearing end caps are provided on the outward side of the bearings.

Images