CN216583799U

CN216583799U - Automatic structure for shear type clamp

Info

Publication number: CN216583799U
Application number: CN202120751958.XU
Authority: CN
Inventors: 张文新; 杨浩; 葛国春
Original assignee: Changzhou Anlank Machinery Co ltd
Current assignee: Changzhou Anlank Machinery Co ltd
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2022-05-24
Anticipated expiration: 2031-04-13

Abstract

The utility model relates to an automatic clamp, in particular to an automatic structure for a shear type clamp. The utility model provides another automatic grabbing and releasing mechanism of a scissor type clamp, which is characterized in that a hook-shaped structure is arranged on a scissor arm I1, a sliding groove is arranged on a connecting rod I3, a pin shaft 5 capable of sliding in the sliding groove is additionally arranged, and the clamp is automatically opened and closed through single hand-lifting and releasing actions. The utility model can be directly formed by laser cutting on the scissor arm I1 and the connecting rod I3 without adding an additional automatic device, the operation process steps are completely consistent with those of the existing automatic clamp, and the utility model is not influenced by the size of the scissor clamp, thereby having wide universality and economy.

Description

Automatic structure for shear type clamp

Technical Field

The utility model relates to a hoisting clamp, in particular to a shear type structure clamp.

Background

At present, shear type clamps are widely used for clamping workpieces in the industries of processing, assembly, logistics and the like at home and abroad. A set of device for controlling the opening and closing of the clamp is generally additionally arranged on the clamps, so that the working efficiency is improved. When the clamp is operated, a person does not need to touch or pull the clamp, and the clamp is automatically opened and closed by directly utilizing the dead weight of the clamp and the contact with the upper surface of a workpiece or the ground. The flow sequence during the operation is as follows: put down the clamp (onto the workpiece) -lift the clamp (clamp grip) -put down the clamp (to the target area) -lift the clamp (clamp open). The 'releasing-lifting-releasing-lifting' sequence can be infinitely circulated, the operation steps are completed in one go, and the efficiency is high.

At present, can realize that anchor clamps are automatic to be opened and shut have: rotor type device, ratchet type device, cam type device.

Due to the fact that the types of workpieces to be clamped are various and the scenes are different, the clamp cannot be standardized. The clamp is limited by size or shape because the clamping object of part of clamps is small, and one of the three devices is additionally arranged on the clamp without space to realize the automatic opening and closing function.

Disclosure of Invention

The utility model aims to provide another structure, and the automatic opening and closing function can be realized on a small-sized shear type clamp without adding an additional device. Meanwhile, the structure can also be applied to a large-scale shear type clamp, so that the manufacturing cost and the production period of the clamp can be reduced.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

an automatic structure for a scissors clamp, characterized in that: the scissors comprise a first scissors arm 1, a second scissors arm 2, a first connecting rod 3, a second connecting rod 4 and a pin shaft 5; the first scissor arm 1 and the second scissor arm 2 are hinged at a position 'j'; the upper end of the scissor arm I1 is hinged with the connecting rod I (two connecting rods I) 3 at the position 'n'; the upper end of the second scissor arm 2 is hinged with the second connecting rod 4 at the position 'n'; the first connecting rod 3 and the second connecting rod 4 are hinged with each other at the position m; the two first connecting rods 3 are respectively arranged on the two sides of the second connecting rod 4 and the first scissor arm 1; a chute 301 is arranged on the first connecting rod 3; the chute 301 is designed into an "L" shape; the pin 5 is limited in the sliding groove 301 and can only roll in the sliding groove 301; a hook-shaped structure 101 is arranged on the first scissor arm 1;

further, the hook structure 101 includes: a first inclined plane 101-1, a second inclined plane 101-2 and a groove 101-3;

further, the chute 301 includes: a first guide surface 301-1, a second guide surface 301-2;

further, the first inclined surface 101-1, the second inclined surface 101-2, the first guide surface 301-1 and the second guide surface 301-2

Since the scissor arms and links of most scissor clamps are quite similar and different, the clamping plate 6 that contacts the workpiece is quite versatile and not very relevant to the present invention; for the sake of simplicity of presentation, the sling (or hook) connecting the hinging point m, is directly indicated by the direction of action of the hinging point m; a clamping plate 6 connected with the hinge points k and k ', which are directly expressed by the hinge points k and k'; in the context of the figures, it is,

indicating the moving direction of the hinge point m;

indicating the moving direction of the pin 5; "→" ← "indicates the direction of movement of the hinge point k, k'; in FIG. 4, a, b, c, d, e, f, g, h, i are schematic views of the states of the stages of the jig according to one operation cycle; m, n ', j, k and k' are represented as hinge points (or pin shafts), and each hinge point can flexibly rotate; the following describes the stages in fig. 4 with reference to fig. 1, 2, 3, and 5.

Arbitrarily define an initial state, as in fig. 4 (a):

(a) the method comprises the following steps The pin 5 is arranged at the bottom of the first guide surface 301-1 of the sliding groove 301 of the first connecting rod 3 and is contacted with the groove 101-3 of the hook-shaped structure 101 on the first scissor arm 1, and when the hinge point m is lifted, because the pin 5 is clamped by the groove 101-3 (refer to fig. 6), the included angle between the first scissor arm 1 and the first connecting rod 3 is limited, and the clamp is in an opening state, and can be moved to be above the workpiece 7 to prepare for clamping operation.

(b) The method comprises the following steps And (3) lowering the scissor type clamp, when the lower part of the guide rod 601 of the clamping plate 6 contacts the workpiece 7, continuously pressing the hinge point m downwards, and driving the pin shaft 5 to slide downwards along the second inclined plane 101-2 on the scissor arm I1 by the chute 301 on the swing rod 3.

(c) The method comprises the following steps Continuing to push down on hinge point m, second inclined surface 101-2 on scissor arm one 1 will push pin 5 into second guide surface 301-2 of chute 301 on link one 3.

(d) The method comprises the following steps The second guide surface 301-2 on the first connecting rod 3 is intentionally designed to be inclined upward. The hinge point m is lifted up and the pin 5 stays at the lowest end (in fig. 3, the left end of the slide groove 301) of the second guide surface 301-2 due to gravity unless the second guide surface 301-2 goes over the horizontal plane.

(e) The method comprises the following steps Continuing to lift the hinge point m, the second guide surface 301-2 on the first connecting rod 3 is inclined downwards, the pin 5 rolls along the sliding groove 301 under the influence of gravity, slides into the first guide surface 301-1 on the first connecting rod 3 and falls on the first inclined surface 101-1 on the first scissor arm 1.

(f) The method comprises the following steps The hinge point m is lifted continuously, and the sliding groove 301 on the connecting rod I3 drives the pin shaft 5 to be separated from the scissor arm I1;

note: (e) in the stage (f), the distance between the hinge points k and k' is reduced; if a workpiece is clamped between the hinge points k and k ', the distance between the hinge points k and k' can be prevented from being reduced. The two stages are also workpiece clamping stages, in which the clamped workpiece is moved over the target position.

(g) The method comprises the following steps Referring to fig. 7, when the hinge point m is lowered, once the workpiece touches the ground, the first connecting rod 3 drives the pin shaft 5 to move downwards, and when the workpiece touches the first inclined surface 101-1 on the first scissor arm 1, the workpiece rolls along the first inclined surface 101-1.

(h) The method comprises the following steps Continuing to press the hinge point m, the pin 5 will be out of contact with the lower end of the first inclined surface 101-1 of the first scissor arm 1, but will still be on the first guiding surface of the first connecting rod 3.

(i) The method comprises the following steps The hinge point m is continuously pressed downwards, and the pin shaft 5 on the first guide surface 301-1 of the first connecting rod 3 slides downwards along the first guide surface 301-1 under the influence of gravity and is contacted with a second inclined surface on the first scissor arm 1;

at this time, if the hinge point m is lifted up, referring to step (a) and fig. 6, the sliding slot 301 on the first link 3 pushes the pin 5 to move up along the second inclined plane on the first scissor arm 1 until being hooked by the groove 101-3 on the first scissor arm 1. At this point, the hinge points k, k' can no longer be moved closer to each other, which can be seen as the clamp opening, and the clamp can be removed from the workpiece 7, as shown in (a), completing one "clamp-and-release" cycle.

The above steps can be simplified as follows:

the clamp is lowered (onto the workpiece) -the pin 5 is pushed by the second inclined surface 101-2 on the scissor arm 1 into the lower end of the second guide surface 301-2 of the chute 301 on the link one 3, to the left of the chute 301 in fig. 3.

Lifting the jig (the workpiece is gripped) -the pin 5 slides into the lower end of the first guide surface 301-1 of the chute 301 on the link-one 3, the right side of the chute 301 in fig. 3.

The clamp is lowered (to the ground) -the pin 5 follows the first inclined surface 101-1 of the first scissor arm 1, the first guide surface 301-1 of the first connecting rod 3, and reaches the second inclined surface 101-2 of the first scissor arm 1.

And (3) lifting the clamp, namely pushing the pin shaft 5 to the groove 101-3 on the scissor arm I1 by the first guide surface 301-1 on the connecting rod I3, clamping the clamp, and moving the clamp to prepare for clamping the next workpiece.

Due to the progress of modern processing technology, the utility model can directly perform laser cutting processing forming on the scissor arm I1 and the connecting rod I3, can realize the automatic opening and closing of the clamp without adding an additional automatic device, has completely consistent operation process steps with the existing automatic clamp, and is not influenced by the size of the scissor clamp, thereby having wide universality and economy.

Drawings

FIG. 1 is a schematic external view of a scissor construction.

Fig. 2 is a schematic structural view of the scissor arm 1.

Fig. 3 is a schematic structural diagram of the first connecting rod 3.

FIG. 4 is a schematic diagram of the present invention illustrating the change of positions of various points in the operation process.

Fig. 5 is a schematic view of the complete structure of the utility model after being connected with a splint.

FIG. 6 is a schematic view of a workpiece being clamped according to the present invention

FIG. 7 is a schematic view of the present invention about to put down a workpiece

FIG. 8 is a schematic view of a rotor type automatic clamp

Wherein, 1, a first scissor arm; 101. a hook structure; 101-1, a first bevel; 101-2. a second bevel; 101-3, a groove; 2. a second scissor arm; 3. a first connecting rod; 301. a chute; 301-1. a first guide surface; 301-2. a second guide face; 4. a second connecting rod; 5. a pin shaft; 6. a splint; 601. a guide bar; 7. a workpiece; 8. a ground surface; 9. a rotor body; 901. T-shaped peg; 10, a U-shaped card; 1001, a U-shaped card bottom surface;

m, n ', j, k' are expressed as "hinge points" or "pins"

Detailed Description

The automatic structure of the present invention will be further explained with reference to the embodiments and the accompanying drawings.

An automatic structure for a scissors clamp as shown in fig. 1 and 5 is characterized in that: the scissors comprise a first scissors arm 1, a second scissors arm 2, a first connecting rod 3, a second connecting rod 4, a pin shaft 5 and a clamping plate 6; the first scissor arm 1 and the second scissor arm 2 are hinged at a j position; the upper end of the first scissor arm 1 is hinged with the first connecting rod(s) 3 at the position 'n'; the upper end of the second scissor arm 2 is hinged with the second connecting rod 4 at the position 'n'; the first connecting rod 3 and the second connecting rod 4 are hinged with each other at the position m; the two first connecting rods 3 are respectively arranged on two sides of the second connecting rod 4 and the first scissor arm 1; a chute 301 is arranged on the first connecting rod 3; the chute 301 is designed into an "L" shape; the pin 5 is limited in the chute 301 and can only roll in the chute 301; a hook-shaped structure 101 is arranged on the first scissor arm 1; a pin hole 601-1 and a waist-shaped hole 601-2 are arranged on the guide rod 601 of the clamping plate 6; the clamping plates 6 are symmetrically arranged on two sides of the first scissor arm 1 and the second scissor arm 2; the pin shafts k, k ' (for simplicity, the hinge points k, k ' are represented as the pin shafts k, k ') and are hinged to the pin holes 601-1 of the two clamping plates 6 and penetrate through the waist holes 601-2 of the guide rods 601 on the other side.

since the scissor arms and links of most scissor clamps are quite similar and different, the clamping plate 6 that contacts the workpiece is quite versatile and not very relevant to the present invention; for the sake of simplicity of presentation, the sling (or hook) connecting the hinging point m, is directly indicated by the direction of action of the hinging point m; connecting hinge point kThe splint 6 of k 'is directly expressed by a hinge point k and k'; in FIG. 4

Indicating the moving direction of the hinge point m;

indicating the moving direction of the pin 5; "→" ← "indicates the direction of movement of the hinge point k, k'; in FIG. 4, a, b, c, d, e, f, g, h, i are schematic views of the states of the stages of the jig according to one operation cycle; m, n ', j, k and k' are hinge points (or pin shafts), and each hinge point can flexibly rotate; next, the respective stages in fig. 4 will be described with reference to fig. 1, fig. 2, fig. 3, fig. 5, fig. 6, and fig. 7.

The initial state of fig. 6 (corresponding to fig. 4 (a)) is set as follows: the workpiece 7 is placed on the ground 8, and the jig is moved to above the workpiece to prepare for gripping the workpiece 7.

Fig. 4 shows a cycle of the gripper movement, and the various stages of movement of the pin 5 are described below.

(a) The method comprises the following steps The pin 5 is at the bottom of the first guiding surface 301-1 of the sliding groove 301 of the first connecting rod 3 and contacts with the groove 101-3 of the hook-shaped structure 101 on the first scissor arm 1, and when the hinge point m is lifted, because the pin 5 is clamped by the groove 101-3 (see fig. 6), the included angle between the first scissor arm 1 and the first connecting rod 3 is limited, and the clamp is in an open state, and the clamp can be moved to the position above the workpiece 7 to prepare for clamping operation.

(c) The method comprises the following steps Continuing to push down on hinge point m, second inclined surface 101-2 on scissor arm one 1 will push pin 5 into second guide surface 301-2 on link one 3.

(f) The method comprises the following steps The hinge point m is continuously lifted, and the sliding groove 301 on the first connecting rod 3 drives the pin shaft 5 to be separated from the scissor arm 1;

note: (e) in the stage (f), the distance between the hinge points k and k' is reduced; because the hinge points k and k 'are respectively hinged with the two clamping plates 6, if a workpiece is clamped between the clamping plates, the distance between the hinge points k and k' can be prevented from being reduced. The two stages are also workpiece clamping stages, in which the clamped workpiece is moved over the target position.

(i) The method comprises the following steps The hinge point m is continuously pressed downwards, the pin shaft 5 on the first guide surface 301-1 of the first connecting rod 3 slides downwards along the first guide surface 301-1 under the influence of gravity and is contacted with a second inclined surface on the first scissor arm 1;

at this time, if the hinge point m is lifted up, referring to step (a) and fig. 6, the sliding slot 301 on the first link 3 drives the pin 5 to move up along the second inclined plane on the first scissor arm 1 until being hooked by the groove 101-3 on the first scissor arm 1. The jaws 6 can no longer be moved closer together, and can now be seen as open jaws, which can be removed from the workpiece 7, as shown in (a), to complete a "clamp-and-release" cycle.

The above steps can be simplified as follows:

In order to facilitate comparison of the differences between the present invention and the conventional automatic apparatus, the automatic jig of the rotor type will now be described with reference to fig. 8:

as shown in fig. 8, the rotor type robot includes a rotor body 9 with a T-shaped plug 901, and a U-shaped card 10; a set of mechanism (not shown here) is arranged inside the rotor body 9, and when the T-shaped bolt 901 is pressed towards the rotor body 9, the T-shaped bolt 901 rotates 90 degrees every time the T-shaped bolt is pressed; the rotor body 9 is connected to the first link 3 and the U-shaped clip 10 is connected to the scissor arm 2.

When the length direction of the T-shaped bolt 901 is consistent with the bayonet direction of the U-shaped card 10, the T-shaped bolt 901 can freely enter the U-shaped card 10, and the rotation of the second scissor arm 2 and the first connecting rod 3 is not affected; when the T-shaped bolt 901 is pressed towards the rotor body 9 by the U-shaped card bottom surface 1001, the T-shaped bolt 901 rotates 90 degrees, the T-shaped bolt 901 is clamped inside the U-shaped card 10, and the rotation of the scissor arm two 2 and the link rod one 3 is affected. And the T-shaped bolt 901 is pressed down once again, the T-shaped bolt rotates 90 degrees, and the rotor body 9 and the U-shaped card 10 can be smoothly separated.

When the T-shaped plug 901 is clamped inside the U-shaped card 10, the clamp is in an open state; when the length direction of the T-shaped bolt 901 is consistent with the bayonet direction of the U-shaped card 10, the T-shaped bolt 901 is separated from the U-shaped card 10, the second scissor arm 2 and the first connecting rod 3 can smoothly rotate, and the clamp is designed to be in a state of clamping a workpiece. The whole process can be expressed as follows:

the clamp is put down (the T-shaped clamp rotates 90 degrees on the workpiece, the second scissors arm 2 and the first connecting rod 3 can be separated), the clamp is lifted (the workpiece is clamped), the workpiece is put down (the T-shaped clamp rotates 90 degrees), and the clamp is lifted (the clamp is clamped, the clamp is in an open state, and clamping of the next workpiece is prepared).

It can be seen from the above that, the present invention and the rotor type automatic clamp both realize the locking of the scissor arm and the connecting rod through a structure or a device, and the operation modes are completely consistent; however, the scissors arm I1 and the connecting rod I3 can be directly formed by laser cutting, so that the automatic opening and closing of the clamp can be realized by only using one pin shaft without adding an additional device; therefore, compared with the existing rotor type, cam type and ratchet type automatic clamp, the utility model has great economical efficiency.

It will be appreciated that modifications and variations are possible to those skilled in the art in light of the above teachings, and it is intended to cover all such modifications and variations as fall within the scope of the appended claims.

Claims

1. An automatic structure for a scissors clamp, characterized in that: comprises a first scissor arm (1), a second scissor arm (2), a first connecting rod (3), a second connecting rod (4) and a pin shaft (5); the first scissor arm (1) is hinged with the second scissor arm (2); the upper end of the scissor arm I (1) is hinged with the connecting rod I (3); the upper end of the second scissor arm (2) is hinged with the second connecting rod (4); the first connecting rod (3) and the second connecting rod (4) are hinged with each other; the two first connecting rods (3) are respectively arranged on two sides of the second connecting rod (4) and the first scissor arm (1); a chute (301) is arranged on the connecting rod I (3); the chute (301) is designed in an L shape; a pin shaft (5) is arranged in the sliding groove (301); a hook-shaped structure (101) is arranged on the first scissor arm (1);

the hook structure (101) comprises: a first inclined plane (101-1), a second inclined plane (101-2) and a groove (101-3);

the chute (301) comprises: a first guide surface (301-1) and a second guide surface (301-2).