A mechanical grasping mechanism

Abstract

This invention discloses a mechanical gripping mechanism, comprising: a frame, a single-ear gripping hook, a double-ear gripping hook, a stop pin, a torsion spring, a connecting rod, and a handle; pins are respectively provided at the ends of the two side plates of the frame; the two pins are respectively pinned to the double-ear gripping hook and the single-ear gripping hook C; three fixing pins are provided on one side plate of the U-shaped plate of the frame, namely the first pin, the second pin, and the third pin; the middle part of the handle is pinned to the first pin on the frame; one end of the stop pin is pinned to the second pin on the frame; one end of the connecting rod is pinned to the pin rod at the other end of the stop pin, and the other end of the connecting rod is pinned to the end of the handle; the middle part of the torsion spring is fitted onto the second pin on the frame, one end of the torsion spring is fitted onto the pin rod of the stop pin, and the other end abuts against the third pin on the frame; this invention facilitates object alignment, automatically connects, and has short operation time and high efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of hoisting and grabbing, and in particular relates to a mechanical grabbing mechanism. Background Art

[0002] At present, the ear plate and pin shaft are generally used for precise positioning lifting and grabbing. Due to the large positioning error between the vehicle and the hoisted object, the operation process needs to be repeatedly adjusted, which is inefficient and requires manual pin insertion during lifting. Summary of the invention

[0003] In view of this, the present invention provides a mechanical grasping mechanism, which is convenient for alignment with an object, automatically connected, has a short operation time and high efficiency.

[0004] The present invention is achieved through the following technical solutions:

[0005] A mechanical grabbing mechanism comprises: a frame, three single-ear grabbing hooks, a stop pin, a torsion spring, a connecting rod and a handle;

[0006] The lower part of the single-ear grab hook is processed with a circular notch, and the upper part is processed with an L-shaped notch;

[0007] The three single-ear grabbing hooks are respectively single-ear grabbing hook A, single-ear grabbing hook B and single-ear grabbing hook C, wherein the single-ear grabbing hook A and the single-ear grabbing hook B are connected in parallel as a whole to form a double-ear grabbing hook;

[0008] The frame is a U-shaped plate; the ends of the two side plates of the U-shaped plate are respectively provided with pins; the two pins are respectively pin-connected with the double-ear grabbing hook and the single-ear grabbing hook C; the double-ear grabbing hook and the single-ear grabbing hook C can rotate around the pins, and the single-ear grabbing hook C can be inserted between the single-ear grabbing hook A and the single-ear grabbing hook B of the double-ear grabbing hook; the center of gravity of the whole composed of the single-ear grabbing hook C and the double-ear grabbing hook is in the middle of the two pins;

[0009] The circular notch at the bottom of the double-ear grabbing hook is opposite to the circular notch at the bottom of the single-ear grabbing hook C; when the circular notch of the double-ear grabbing hook is connected with the circular notch of the single-ear grabbing hook C to form a circular hook cavity, the L-shaped notch at the top of the double-ear grabbing hook is connected with the L-shaped notch at the top of the single-ear grabbing hook C to form a rectangular groove with an opening upward;

[0010] Three fixing pins are arranged on one side plate of the U-shaped plate of the frame, and from the horizontal part of the U-shaped plate to the end of the side plate, the three fixing pins are respectively a first pin, a second pin and a third pin;

[0011] The middle part of the handle is pin-connected with the first pin body on the frame;

[0012] The stop pin includes a connecting plate and a pin rod fixed at one end of the connecting plate; a connecting hole is processed at the other end of the connecting plate; the connecting hole of the stop pin is pin-connected with the second pin body on the frame; the pin rod end of the stop pin is located above the double-ear grabbing hook and the single-ear grabbing hook C;

[0013] One end of the connecting rod is pin-connected with the pin of the stop pin, and the other end of the connecting rod is pin-connected with the end of the handle located between the two side plates of the frame;

[0014] The middle part of the torsion spring is sleeved on the second pin body on the frame, one end of the torsion spring is sleeved on the pin rod of the stop pin, and the other end abuts against the third pin body on the frame; the torsion spring is always in a torsion state, and the torsion spring elastic force is applied to the stop pin.

[0015] Furthermore, the single-ear grabbing hook A and the single-ear grabbing hook B are connected in parallel as a whole through a stopper.

[0016] Furthermore, the handle is a V-shaped rod.

[0017] Furthermore, the tip of the V-shaped rod is an obtuse angle.

[0018] Furthermore, when grabbing an object, the circular notch of the double-ear grabbing hook and the circular notch of the single-ear grabbing hook C are connected to form a circular hook cavity, and the L-shaped notch on the upper part of the double-ear grabbing hook and the L-shaped notch on the upper part of the single-ear grabbing hook C are connected to form a rectangular groove with an opening upward; after the rectangular groove is formed, the pin rod of the stop pin falls into the rectangular groove under the elastic force of the torsion spring; at this time, the double-ear grabbing hook and the single-ear grabbing hook C are locked, and the crossbar of the object is locked in the circular hook cavity;

[0019] When the object is disengaged, the pin rod of the stop pin is disengaged from the rectangular groove; the circular notch of the double-ear grabbing hook is separated from the circular notch of the single-ear grabbing hook C, the circular hook cavity is opened, and the cross bar of the object is disengaged.

[0020] Beneficial effects: The present invention is convenient and fast to align with the object, can automatically complete the grasping action, is easy to operate, has a short operation time and high efficiency, and the grasping mechanism can be mechanically self-locking, with good safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural composition diagram of the present invention;

[0022] Figure 2 It is a stop pin diagram of the present invention;

[0023] Figure 3 A diagram showing the working process of grabbing an object according to the present invention;

[0024] Among them, 1-frame, 2-single ear grab hook C, 3-double ear grab hook, 4-stop pin, 5-torsion spring, 6-connecting rod, 7-handle, 8-pin shaft, 9-stop block, 10-first pin body, 11-second pin body, 12-third pin body, 13-rectangular groove, 14-circular hook cavity. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0026] This embodiment provides a mechanical grasping mechanism, see attached Figure 1 , including: a frame 1, three single-ear grab hooks, a stop pin 4, a torsion spring 5, a connecting rod 6 and a handle 7;

[0027] The lower part of the single-ear grab hook is processed with a circular notch, and the upper part is processed with an L-shaped notch;

[0028] The three single-ear grabbing hooks are respectively single-ear grabbing hook A, single-ear grabbing hook B and single-ear grabbing hook C2, wherein the single-ear grabbing hook A and the single-ear grabbing hook B are connected in parallel as a whole through a stopper 9 to form a double-ear grabbing hook 3;

[0029] The frame 1 is a U-shaped plate; the ends of the two side plates of the U-shaped plate are respectively provided with pins 8; the two pins 8 are respectively pin-connected with the double-ear grabbing hook 3 and the single-ear grabbing hook C2; the double-ear grabbing hook 3 and the single-ear grabbing hook C2 can rotate around the pins 8, and the single-ear grabbing hook C2 can be inserted between the single-ear grabbing hook A and the single-ear grabbing hook B of the double-ear grabbing hook 3; the center of gravity of the whole composed of the single-ear grabbing hook C2 and the double-ear grabbing hook 3 is in the middle of the two pins 8, which can ensure that the single-ear grabbing hook C2 and the double-ear grabbing hook 3 are automatically opened under the action of gravity;

[0030] The circular notch at the bottom of the double-ear grabbing hook 3 is opposite to the circular notch at the bottom of the single-ear grabbing hook C2; when the circular notch of the double-ear grabbing hook 3 is connected with the circular notch of the single-ear grabbing hook C2 to form a circular hook cavity 14, the L-shaped notch at the top of the double-ear grabbing hook 3 is connected with the L-shaped notch at the top of the single-ear grabbing hook C23 to form a rectangular groove 13 with an opening upward;

[0031] Three fixing pins are provided on one side plate of the U-shaped plate of the frame 1. From the horizontal part of the U-shaped plate to the end of the side plate, the three fixing pins are respectively a first pin 10, a second pin 11 and a third pin 12.

[0032] The handle 7 is a V-shaped rod, and the tip of the V-shaped rod is an obtuse angle; the tip of the handle 7 is pin-connected with the first pin body 10 on the frame 1;

[0033] See attached Figure 2The stop pin 4 includes a connecting plate and a pin rod fixed at one end of the connecting plate; a connecting hole is processed at the other end of the connecting plate; the connecting hole of the stop pin 4 is pin-connected with the second pin body 11 on the frame 1; the end of the pin rod of the stop pin 4 is located above the double-ear grabbing hook 3 and the single-ear grabbing hook C2;

[0034] One end of the connecting rod 6 is pin-connected to the pin of the stop pin 4, and the other end of the connecting rod 6 is pin-connected to the end of the handle 7 located between the two side plates of the frame 1;

[0035] The middle part of the torsion spring 5 is sleeved on the second pin body 11 on the frame 1, one end of the torsion spring 5 is sleeved on the pin rod of the stop pin 4, and the other end is in contact with the third pin body 12 on the frame 1; the torsion spring 5 is always in a torsion state, and the elastic force of the torsion spring 5 is applied to the stop pin 4.

[0036] Working principle: See attached Figure 3 When grabbing an object, the double-ear grabbing hook 3 and the single-ear grabbing hook C2 of the grabbing mechanism gradually approach the cross bar on the object; when the cross bar enters the circular notches of the double-ear grabbing hook 3 and the single-ear grabbing hook C2, the grabbing mechanism continues to move downward, at this time, the cross bar contacts the wall surface of the circular notch, and pushes the single-ear grabbing hook C2 and the double-ear grabbing hook 3 upward, that is, the cross bar drives the single-ear grabbing hook C2 and the double-ear grabbing hook 3 to rotate clockwise and counterclockwise around the corresponding pin shaft 8 respectively; in the process of the single-ear grabbing hook C2 and the double-ear grabbing hook 3 pushing upward, the pin rod end of the stop pin 4 is also pushed upward at the same time, that is, the pin rod end of the stop pin 4 overcomes the elastic force of the torsion spring 5 and rotates around the second pin body on the frame 1 11 rotates along the axis; at the same time, in the process of the single-ear grabbing hook C2 and the double-ear grabbing hook 3 pushing up, the circular notch of the double-ear grabbing hook 3 gradually connects with the circular notch of the single-ear grabbing hook C2 to form a circular hook cavity 14, and the L-shaped notch on the upper part of the double-ear grabbing hook 3 and the L-shaped notch on the upper part of the single-ear grabbing hook C2 gradually connect to form a rectangular groove 13 with an opening upward; after the rectangular groove 13 is formed, the pin rod of the stop pin 4 falls into the rectangular groove 13 under the elastic force of the torsion spring 5; at this time, the double-ear grabbing hook 3 and the single-ear grabbing hook C2 are locked, the grabbing mechanism realizes mechanical self-locking, and the cross bar is locked in the circular hook cavity 14; the upward moving grabbing mechanism can lift the object through the cross bar to complete the grabbing of the object.

[0037] When the object is detached, first put the object down on the ground, and then manually press the handle 7, so that the handle 7 rotates around the axis of the first pin body 10 on the frame 1, and the end of the pin rod of the stop pin 4 is driven by the connecting rod 6 to overcome the elastic force of the torsion spring 5 and move upward, so that the pin rod of the stop pin 4 is detached from the rectangular groove 13; the single-ear grabbing hook C2 and the double-ear grabbing hook 3 rotate counterclockwise and clockwise around the corresponding pin shaft 8 respectively under the action of gravity, and the circular notch of the double-ear grabbing hook 3 is connected to the The circular notch of the single-ear grabbing hook C2 is gradually separated, the circular hook cavity 14 is opened, and the cross bar of the object is detached, thereby realizing the detachment of the object; wherein, after the circular hook cavity 14 is opened, the single-ear grabbing hook C2 is abutted against the stopper 9 of the double-ear grabbing hook 3, thereby realizing the rotation limitation of the double-ear grabbing hook 3 and the single-ear grabbing hook C2, thereby preventing the circular notch of the double-ear grabbing hook 3 from continuing to separate from the circular notch of the single-ear grabbing hook C2. At this time, the single-ear grabbing hook C2 and the double-ear grabbing hook 3 are separated into place.

[0038] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical grasping mechanism, characterized in that: include: A frame (1), three single-ear grab hooks, a stop pin (4), a torsion spring (5), a connecting rod (6) and a handle (7); The lower part of the single-ear grab hook is processed with a circular notch, and the upper part is processed with an L-shaped notch; The three single-ear grabbing hooks are respectively a single-ear grabbing hook A, a single-ear grabbing hook B and a single-ear grabbing hook C (2), wherein the single-ear grabbing hook A and the single-ear grabbing hook B are connected in parallel to form a double-ear grabbing hook (3); The frame (1) is a U-shaped plate; the ends of the two side plates of the U-shaped plate are respectively provided with pins (8); the two pins (8) are respectively pin-connected with the double-ear grabbing hook (3) and the single-ear grabbing hook C (2); the double-ear grabbing hook (3) and the single-ear grabbing hook C (2) can rotate around the pins (8), and the single-ear grabbing hook C (2) can be inserted between the single-ear grabbing hook A and the single-ear grabbing hook B of the double-ear grabbing hook (3); the center of gravity of the whole formed by the single-ear grabbing hook C (2) and the double-ear grabbing hook (3) is in the middle of the two pins (8); The circular notch at the bottom of the double-ear grabbing hook (3) is opposite to the circular notch at the bottom of the single-ear grabbing hook C (2); when the circular notch of the double-ear grabbing hook (3) and the circular notch of the single-ear grabbing hook C (2) are butted together to form a circular hook cavity (14), the L-shaped notch at the top of the double-ear grabbing hook (3) and the L-shaped notch at the top of the single-ear grabbing hook C (2) are butted together to form a rectangular groove (13) with an opening facing upward; Three fixing pins are arranged on a side plate of the U-shaped plate of the frame (1), and from the horizontal part of the U-shaped plate to the end of the side plate, the three fixing pins are respectively a first pin (10), a second pin (11) and a third pin (12); The middle part of the handle (7) is pin-connected to the first pin body (10) on the frame (1); The stop pin (4) comprises a connecting plate and a pin rod fixed to one end of the connecting plate; a connecting hole is processed at the other end of the connecting plate; the connecting hole of the stop pin (4) is pin-connected with a second pin body (11) on the frame (1); the end of the pin rod of the stop pin (4) is located above the double-ear grabbing hook (3) and the single-ear grabbing hook C (2); One end of the connecting rod (6) is pin-connected to the pin of the stop pin (4), and the other end of the connecting rod (6) is pin-connected to the end of the handle (7) located between the two side plates of the frame (1); The middle part of the torsion spring (5) is sleeved on the second pin body (11) on the frame (1), one end of the torsion spring (5) is sleeved on the pin rod of the stop pin (4), and the other end abuts against the third pin body (12) on the frame (1); the torsion spring (5) is always in a torsion state, and the elastic force of the torsion spring (5) is applied to the stop pin (4).

2. A mechanical grasping mechanism as claimed in claim 1, characterized in that: The single-ear grabbing hook A and the single-ear grabbing hook B are connected in parallel as a whole via a stopper (9).

3. A mechanical grasping mechanism as claimed in claim 1, characterized in that: The handle (7) is a V-shaped rod.

4. A mechanical grasping mechanism as claimed in claim 3, characterized in that: The tip of the V-shaped rod is an obtuse angle.

5. A mechanical grasping mechanism as claimed in claim 1, characterized in that: When grabbing an object, the circular notch of the double-ear grabbing hook (3) is butted against the circular notch of the single-ear grabbing hook C (2) to form a circular hook cavity (14), and the L-shaped notch on the upper part of the double-ear grabbing hook (3) is butted against the L-shaped notch on the upper part of the single-ear grabbing hook C (2) to form a rectangular groove (13) with an opening facing upward; After the rectangular groove (13) is formed, the pin rod of the stop pin (4) falls into the rectangular groove (13) under the elastic force of the torsion spring (5); at this time, the double-ear grabbing hook (3) and the single-ear grabbing hook C (2) are locked, and the crossbar of the object is locked in the circular hook cavity (14); When the object is detached, the pin rod of the stop pin (4) is detached from the rectangular groove (13); the circular notch of the double-ear grabbing hook (3) is separated from the circular notch of the single-ear grabbing hook C (2), the circular hook cavity (14) is opened, and the crossbar of the object is detached.

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