Overturning and falling preventing clamping jaw mechanism for lifting and moving cylindrical workpiece

Abstract

The utility model aims to provide an overturning and falling preventing clamping jaw mechanism for lifting and moving a cylindrical workpiece, and aims to solve the problems that a metal casting section or a large-size blank metal pipe fitting or other workpieces which are generally cylindrical and are large in self weight and size, but the center-of-gravity position is difficult to accurately measure and locate, and clamping and grabbing are difficult. Even if the workpiece slightly inclines towards one end, stable and reliable connection between the clamping jaw and the workpiece can be guaranteed, and the problem that the cylindrical workpiece slips and falls off is effectively solved. The overturning and falling preventing clamping jaw mechanism for lifting and moving the cylindrical workpiece structurally and mainly comprises a main body connecting rod and two clamping jaw units, the main body connecting rod is in a horizontally-arranged cylinder shape, and an annular hanging point used for being connected with a hook of hoisting equipment is arranged in the middle of the main body connecting rod; the two clamping jaw units are arranged on the two sides of the annular hanging point respectively.

Description

TECHNICAL FIELD

[0001] The utility model relates to workpiece moves with clamp equipment field, concretely is a cylindrical workpiece lifting and moving anti -overturning and falling claw mechanism. BACKGROUND

[0002] At present, no matter chemical industry, construction or mining industry, the large mechanical equipment or conveying pipe fittings that it must use need to utilize some solid metal casting sections of cylindrical shape or hollow cylindrical pipe fittings, and these whole cylindrical workpieces are moved between various processing areas and are processed in a targeted manner. However, due to the large overall size and weight of these workpieces, and the particularity of their cylindrical shape, it is difficult to connect and fix them using conventional hooks, straps and the like. Therefore, if such workpieces need to be lifted or moved, special claw mechanisms or devices are required to achieve this.

[0003] A round steel pipe lifting clamp disclosed in Chinese utility model patent file with application number CN201920720562.1, including a lifting ring, a connecting rod, a clamp and a stopper, the middle segments of two clamps are hinged to each other through a first hinge shaft to form a scissor mechanism, two opposite arm bodies of the two clamps form clamping arms, and the ends of the other two arm bodies are hingedly connected to one end of the connecting rod, the other end of the connecting rod is coaxially hingedly connected through a second hinge shaft, and the lifting ring is arranged on the second hinge shaft; one end of the stopper is rotatably arranged on the second hinge shaft, the other end of the stopper is a stop end, and the stop end is arranged corresponding to the first hinge shaft; in the lifting state, the stopper limits the distance between the first hinge shaft and the second hinge shaft, which can effectively maintain the stability of the steel pipe lifting and improve the safety.

[0004] The claw assembly under the above structure can prevent the claw from opening and loosening by using the stopper during the installation and subsequent lifting and moving of some cylindrical metal workpiece sections or hollow metal pipe fittings with short axial dimensions, thereby ensuring the stability and reliability of the cylindrical workpiece movement. However, the applicant found that, in addition to the insufficient locking and clamping reliability of the claw itself, another important reason for the workpiece falling is that the cylindrical metal workpiece has a smoother surface than usual, and when the gripping position point is offset from the center of gravity position point of the workpiece, the workpiece in the original horizontal state tends to tilt to one end. For some cylindrical metal sections that need to be further processed in the intermediate process, due to their large weight, long axial size and irregular surface and internal structure, it is more difficult to clamp and grasp near the actual center of gravity position point, which can easily lead to the above-mentioned tilting and slipping, increasing the risk of on-site safety.

[0005] In order to solve the above problems, the utility model provides a kind of anti-overturning and falling off clamping jaw mechanism for cylindrical workpiece lifting movement, for example, metal casting section or large size blank metal pipe etc. Overall, it is generally cylindrical, own weight and size are larger, but it is difficult to accurately measure and position the center of gravity and carry out clamping and grabbing workpiece, even if workpiece occurs to one end small inclination, it can also guarantee the connection between clamping jaw and workpiece stable and reliable, effectively reduce the problem that cylindrical workpiece slips and falls. SUMMARY

[0006] The utility model provides a kind of anti-overturning and falling off clamping jaw mechanism for cylindrical workpiece lifting movement, for example, metal casting section or large size blank metal pipe etc. Overall, it is generally cylindrical, own weight and size are larger, but it is difficult to accurately measure and position the center of gravity and carry out clamping and grabbing workpiece, even if workpiece occurs to one end small inclination, it can also guarantee the connection between clamping jaw and workpiece stable and reliable, effectively reduce the problem that cylindrical workpiece slips and falls.

[0007] The above technical purpose of the utility model is realized by the following technical scheme:

[0008] A kind of anti-overturning and falling off clamping jaw mechanism for cylindrical workpiece lifting movement, including main body connecting rod and two clamping jaw units, the main body connecting rod is horizontally arranged cylindrical, the middle part of the main body connecting rod is provided with the annular hanging point for being connected with the hook of hoisting equipment, the two clamping jaw units are respectively arranged at the two sides of the annular hanging point.

[0009] As the preferred of the utility model, the top of the clamping jaw unit is provided with the connecting hole for the main body connecting rod to pass through, and the clamping jaw unit can be adjusted and moved along the axis direction of the main body connecting rod.

[0010] As the preferred of the utility model, external thread structure is formed on the main body connecting rod, and locking assembly for resisting and positioning the clamping jaw unit is installed, the locking assembly includes a pair of locking nuts respectively arranged at both ends of the connecting hole, and the thread rotation directions of the locking nuts on both sides are opposite.

[0011] As the preferred of the utility model, the clamping jaw unit further includes quadrilateral hinged structure formed below the connecting hole, and the lower end of the quadrilateral hinged structure continues to extend outward to form arc-shaped clamping jaw part for clamping cylindrical workpiece.

[0012] As the preferred of the utility model, the anti -drop hanging connecting piece is further arranged between the upper hinge joint and the lower hinge joint of the quadrilateral hinge joint structure, the upper end of the anti -drop hanging connecting piece can rotate around the upper hinge joint, and the lower end of the anti -drop hanging connecting piece is formed with a locking hook part; The lower hinge joint is formed with a protruding section extending outward, and the anti -drop hanging connecting piece can change the hooking or separation state between the locking hook part and the protruding section by rotating around the upper hinge joint.

[0013] As the preferred of the utility model, the upper end of the anti -drop hanging connecting piece is further formed with a driving handle section extending outward.

[0014] As the preferred of the utility model, the elastic friction pad layer is further attached on the inner side of the arc-shaped claw part.

[0015] As the preferred of the utility model, the anti -drop hanging connecting piece is further arranged between the upper hinge joint and the lower hinge joint of the quadrilateral hinge joint structure, the upper end of the anti -drop hanging connecting piece can rotate around the upper hinge joint, and the lower end of the anti -drop hanging connecting piece is formed with a locking hook part; The lower hinge joint is formed with a protruding section extending outward, and the anti -drop hanging connecting piece can change the hooking or separation state between the locking hook part and the protruding section by rotating around the upper hinge joint.

[0016] The cylindrical workpiece lifting and moving anti -overturning and falling claw mechanism provided in the utility model scheme can be used for the cylindrical metal workpiece section or metal pipe with long axial size and large weight, can ensure that the claw mechanism does not loosen and fail, can increase the clamping and abutting contact point between the claw mechanism and the workpiece axial direction, can keep the surface of the workpiece and the claw with sufficient friction force to prevent the workpiece from moving axially even after the workpiece is inclined to a certain degree, can effectively avoid the situation that the workpiece falls off due to inclination during lifting and moving, and further improves the safety of the claw mechanism during the movement of the cylindrical metal workpiece BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall state schematic view that the cylindrical workpiece lifting and moving anti -overturning and falling claw mechanism is clamped and moved to a cylindrical rod;

[0018] Figure 2 It is the partial enlarged structure schematic view of the locking assembly;

[0019] Figure 3 It is the structure enlarged schematic view of a single claw unit;

[0020] Figure 4 It is the state schematic view that the single claw unit is clamped and grabbed to the workpiece.

[0021] In the drawing:

[0022] 1 - cylindrical workpiece;

[0023] 2 - main body connecting rod, 201 - annular hanging point;

[0024] 3—clamping unit, 301—connecting hole, 302—quadrilateral hinge structure, 303—arc-shaped clamping part, 3021—upper hinge point, 3022—lower hinge point, 304—protruding section;

[0025] 4—Locking assembly; 401—Locking nut;

[0026] 5—Anti-detachment hook part; 501—Locking hook part; 502—Drive handle section;

[0027] 6—Elastic friction pad layer. Detailed Implementation

[0028] The following specific embodiments are merely explanations of this utility model and are not intended to limit it. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this utility model.

[0029] This solution is achieved through the following technical means:

[0030] Example: In this example, an anti-tipping and detachment gripper mechanism for lifting and moving cylindrical workpieces is provided. For workpieces such as metal casting sections or large-sized blank metal pipes that are roughly cylindrical in shape, with large weight and size, but whose center of gravity is difficult to accurately measure and position for gripping, even if the workpiece tilts slightly to one end, the connection between the gripper and the workpiece can be kept stable and reliable, effectively reducing the problem of the cylindrical workpiece 1 slipping and falling.

[0031] For details, please refer to the instruction manual appendix. Figure 1 As shown, the structure of the gripper mechanism mainly includes a horizontally arranged cylindrical main connecting rod 2. The main connecting rod 2 has an annular hook point 201 for connecting with the hook of the lifting equipment at the middle position. On both sides of the annular hook point 201, gripper units 3 for gripping and grasping the cylindrical workpiece 1 are respectively provided.

[0032] Specifically, for the structure of gripper unit 3 here, please refer to the appendix of the instruction manual. Figure 3 and 4The structure diagram shows that it mainly comprises a quadrilateral articulated structure 302 formed by four bars connected end to end, under which two adjacent connecting sections can rotate around a common articulated center point. At the same time, in the quadrilateral articulated structure 302, the lower ends of the two lower connecting sections continue to extend outward and form a pair of circular arc clamping jaw parts 303 below for clamping the cylindrical workpiece 1. By opening or tightening the two circular arc clamping jaw parts 303, the clamping and fixing of the cylindrical workpiece 1 can be completed.

[0033] In order to adaptively adjust the distance between the two clamping jaws according to the actual length size of different workpieces, so as to more effectively prevent the workpiece from slipping, the clamping jaw unit 3 needs to be designed to be adjustable along the aforementioned main connecting rod 2. Specifically, referring to the drawings Figure 2 As shown, the top end of the clamping jaw unit 3 is provided with a connecting hole 301 for the main connecting rod 2 to pass through, and the clamping jaw unit 3 as a whole can be adjusted and moved along the axis direction of the main connecting rod 2. At the same time, the outer surface of the main connecting rod 2 is also provided with a threaded structure and a locking assembly 4 for positioning the clamping jaw unit 3. The locking assembly 4 comprises a pair of locking nuts 401, and the threads of the two locking nuts 401 are opposite. When a clamping jaw unit 3 is sleeved on the aforementioned main connecting rod 2, the two locking nuts 401 are respectively installed at both ends of the connecting hole 301 in the clamping jaw unit 3. At this time, only the position of the locking nut 401 needs to be adjusted, and the adjustment of the clamping jaw unit 3 between the relaxed movable state and the locked fixed state can be realized, so that the cylindrical metal workpiece of different length sizes can be more adapted, the distance between the two clamping jaws can be increased, the inclination angle of the workpiece during lifting movement can be reduced, and the problem of slipping and falling can be more effectively avoided.

[0034] Under this structure, when the workpiece is clamped and grabbed as a cylindrical metal section or a cylindrical pipe that is a hoisted and moved workpiece to be processed, two locking nuts 401 in the locking assembly 4 can be first adjusted by rotating to move the two nuts away from the claw unit 3, and then the position of the claw unit 3 on the main body connecting rod 2 is adjusted according to the actual workpiece size and the position of the center of gravity, and finally the two nut components are re-adjusted by rotating to complete the locking and fixing of the claw unit 3 on both sides. At this time, since there is a certain distance between the two claws, the workpiece can be clamped and fixed at the two contact points, even if the midpoint of the two clamping positions is offset from the center of gravity of the workpiece, and the cylindrical workpiece 1 sinks at one end and tends to slip and fall, the interlocking support force formed by the inner upper wall of one claw unit 3 and the inner lower wall of the other claw unit 3 can provide strong friction, thereby effectively preventing the workpiece from slipping and falling along the center line.

[0035] As a preferred solution, in order to prevent the two opposite clamping jaws from separating and opening after clamping and grabbing the workpiece, causing the grabbed cylindrical workpiece 1 to fall downward, a anti-falling hanging piece 5 is also provided in this embodiment. First of all, it should be pointed out that the aforementioned quadrilateral hinge structure 302 is in a vertical rhombus state, at this time the structure forms upper and lower hinge points 3021 and 3022 respectively. The structure of the anti-falling hanging piece 5 can also be described with reference to the structure diagram given in the description Figure 3 and 4 The upper end of the anti-falling hanging piece 5 can rotate around the upper hinge point 3021, and the lower end forms a locking hook part 501; at the same time, the lower hinge point 3022 forms a protruding section 304 extending outward as a hinge center. At this time, the anti-falling hanging piece 5 can change the hooking or separating state between the locking hook part 501 and the protruding section 304 by rotating around the upper hinge point 3021. When the anti-falling hanging piece 5 is engaged with the protruding section 304, the distance between the upper hinge point 3021 and the lower hinge point is locked, and at this time the two opposite arc-shaped clamping jaw parts 303 formed in the claw unit 3 cannot move away from each other, thereby effectively preventing the grabbed cylindrical workpiece 1 from falling due to the opening of the clamping jaw.

[0036] Of course, in order to more conveniently drive the aforementioned anti-falling hanging piece 5 to rotate, an outwardly extending driving handle section 502 can be formed at the upper end of the anti-falling hanging piece 5.

[0037] Further preferably, in order to improve the frictional resistance force between the workpiece surface with a relatively smooth surface and easy to slip and the clamping jaw, an elastic friction pad layer 6 made of rubber or the like can be attached to the inner side of the circular-arc-shaped clamping jaw portion 303.

[0038] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be encompassed within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A mechanism for preventing overturning and falling of a clamping jaw for lifting and moving a cylindrical workpiece, characterized by: The utility model relates to a kind of cylindrical workpiece (1) clamping device, including main connecting rod (2) and two jaw units (3), the main connecting rod (2) is horizontally arranged in cylindrical shape, and ring-shaped hanging point (201) for being connected with the hook of lifting equipment is arranged in the middle of the main connecting rod (2), and the two jaw units (3) are respectively arranged in the two sides of the ring-shaped hanging point (201).

2. The anti-overturning and falling-off clamp jaw mechanism for the lifting and moving of a cylindrical workpiece according to claim 1, characterized in that: The top of the jaw unit (3) is provided with a connecting hole (301) for the main connecting rod (2) to pass through, and the jaw unit (3) as a whole can be adjusted and moved along the axis direction of the main connecting rod (2).

3. The anti-overturning and falling-off clamp jaw mechanism for the lifting and moving of a cylindrical workpiece according to claim 2, characterized in that: The main connecting rod (2) is formed with an external thread structure and is provided with a locking assembly (4) for stopping and positioning the jaw unit (3), the locking assembly (4) includes a pair of locking nuts (401) respectively arranged at both ends of the connecting hole (301), and the thread rotation directions of the locking nuts (401) on both sides are opposite.

4. The anti-overturning and falling-off clamp jaw mechanism for the lifting and moving of a cylindrical workpiece according to claim 3, characterized in that: The jaw unit (3) further includes a quadrilateral hinge structure (302) formed below the connecting hole (301), and the lower end of the quadrilateral hinge structure (302) continues to extend outward to form a circular-arc-shaped clamping jaw portion (303) for clamping the cylindrical workpiece (1).

5. The anti-overturning and anti-falling clamp jaw mechanism for lifting and moving a cylindrical workpiece according to claim 4, characterized in that: An anti-disengagement hanging member (5) is further arranged between the upper hinge point (3021) and the lower hinge point (3022) of the quadrilateral hinge structure (302), the upper end of the anti-disengagement hanging member (5) can rotate around the upper hinge point (3021), and the lower end of the anti-disengagement hanging member (5) is formed with a locking hook portion (501); a protruding section (304) extending outward is formed at the lower hinge point (3022), and the anti-disengagement hanging member (5) can change the hooking or separation state between the locking hook portion (501) and the protruding section (304) by rotating around the upper hinge point (3021).

6. The anti-overturning and falling-off clamp jaw mechanism for the lifting and moving of a cylindrical workpiece according to claim 5, characterized in that: The upper end of the anti-disengagement hanging member (5) is further formed with an outwardly extending driving handle section (502).

7. The anti-overturning and falling-off chuck mechanism for lifting and moving a cylindrical workpiece according to claim 6, characterized in that: An elastic friction pad layer (6) is further attached to the inner side of the circular-arc-shaped clamping jaw portion (303).

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