CN218109799U

CN218109799U - Self-locking pressing mechanism

Info

Publication number: CN218109799U
Application number: CN202221945598.8U
Authority: CN
Inventors: 王长土
Original assignee: Wuhan Changhua Changyuan Auto Parts Co ltd
Current assignee: Wuhan Changhua Changyuan Auto Parts Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-12-23
Anticipated expiration: 2032-07-22

Abstract

The utility model relates to a self-locking pressing mechanism, which comprises an angle seat, a cylinder and a clamping component, wherein the angle seat is fixedly provided with a first hinging seat, and a second hinging seat is fixedly arranged between the first hinging seat and a cylinder hinging point; the self-locking pressing mechanism further comprises a bending hinge assembly and a straight hinge assembly, the upper end and the lower end of the bending hinge assembly are respectively hinged with the output end of the air cylinder and the second hinge seat, and one end of the straight hinge assembly is hinged with a bending point of the bending hinge assembly; the upper part of the tail end of the clamping assembly is hinged with the other end of the straight hinge assembly, and the lower part of the tail end of the clamping assembly is hinged with the first hinge seat; when the self-locking pressing mechanism presses the workpiece, two hinge points of the straight hinge assembly and the hinge point of the second hinge seat are located on the same straight line. The utility model discloses a reasonable structural design can form stable mechanics overall structure after the work piece compresses tightly, and hold-down mechanism can normally compress tightly when not receiving external force, can not lead to the part to drop the incident that appears.

Description

Self-locking pressing mechanism

Technical Field

The utility model relates to a welding equipment technical field of robot, in particular to auto-lock hold-down mechanism of work piece fixed part among the welding equipment of robot.

Background

With the development of electronic technology, computer technology, numerical control and robot technology, the automatic welding robot technology has become mature day by day and is widely applied. The welding robot is an industrial robot for welding operation and mainly comprises two parts, namely a robot and welding equipment. The robot consists of a robot body and a control cabinet (hardware and software). The welding equipment, taking arc welding and spot welding as examples, is composed of a welding power supply (including its control system), a wire feeder (arc welding), a welding gun (pliers), etc. The intelligent robot also comprises a sensing system, such as a laser or camera sensor and a control device thereof. In addition to the above-described main part, the welding robot apparatus further includes an associated auxiliary part for conveying and holding and fixing the workpiece. The clamp of the workpiece is an important mechanism in the auxiliary part, and the quality and the precision of welding are directly influenced by the stability of clamping and fixing the workpiece. The existing workpiece clamp generally comprises a fixed seat and a clamping assembly of a workpiece, the workpiece is placed on the fixed seat, the workpiece is pressed by the clamping assembly to realize the purpose of stably fixing the workpiece, and the clamping assembly is generally driven by an air cylinder to ensure that enough clamping force can be provided.

When in actual automatic welding, the common air cylinder is easily subjected to sudden air break caused by external factors in the operation process, the clamping assembly is loosened due to air break of the air cylinder, parts of the robot can be thrown out in the high-speed operation process, and safety accidents are easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to an at least technical problem who exists among the prior art, provide a auto-lock hold-down mechanism, adopt reasonable structural design, can form stable mechanics overall structure after the work piece compresses tightly, hold-down mechanism can normally compress tightly when not receiving external force, can not lead to the part to drop the incident of appearing.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a self-locking pressing mechanism comprises an angle seat, an air cylinder and a clamping assembly, wherein a workpiece fixing area is arranged on one side of the top of the angle seat, the air cylinder is hinged to one end far away from the workpiece fixing area, a first hinge seat is fixedly arranged beside the workpiece fixing area of the angle seat, and a second hinge seat is fixedly arranged at the top of the angle seat and between the first hinge seat and a hinge point of the air cylinder; the self-locking pressing mechanism further comprises a bending hinge assembly and a straight hinge assembly, the bending hinge assembly is in an L shape, two ends of the bending hinge assembly and a bending point are respectively provided with three hinge points, two ends of the straight hinge assembly are provided with two hinge points, the upper end and the lower end of the bending hinge assembly are respectively hinged with the output end of the air cylinder and the second hinge seat, and one end of the straight hinge assembly is hinged with the bending point of the bending hinge assembly; the clamping assembly is arranged above the workpiece fixing area, the tail end of the clamping assembly is provided with two hinge points along the vertical direction, the upper hinge point is hinged with the other end of the straight hinge assembly, and the lower hinge point is hinged with the first hinge seat; when the self-locking pressing mechanism presses a workpiece by the clamping assembly, two hinge points of the straight hinge assembly and a hinge point of the second hinge seat are positioned on the same straight line.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Optionally, a workpiece fixing seat is arranged at the workpiece fixing area of the corner seat.

Optionally, the clamping assembly is "L" shaped or "T" shaped.

Optionally, the self-locking pressing mechanism further comprises a connecting block, the connecting block is arranged between the first hinged seat and the second hinged seat, the top of the connecting block is hinged to a bending point of the bending hinge assembly, and the bottom of the connecting block is connected with the top of the angle seat through a limiting guide assembly so as to ensure that the connecting block can only slide along the vertical direction relative to the angle seat.

Further optionally, the limiting guide assembly is a limiting guide rod, the limiting guide rod is fixedly installed at the top of the angle seat, and a hole matched with the limiting guide rod is formed in the bottom of the connecting block.

Further optionally, the connecting block is "L" shaped or "T" shaped.

Further optionally, the number of the limiting guide rods is at least two, and a limiting hole and a limiting guide hole matched with the limiting guide rods are respectively formed in the bottom end of the long straight part above the connecting block and the side of the bottom of the connecting block.

The beneficial effects of the utility model are that: the utility model discloses a special structural design, use the articulated subassembly and the cooperation of straight articulated subassembly of bending, it compresses tightly the work piece to drive clamping component, and adopt accurate structural design, when making the work piece compress tightly, one side of the articulated subassembly of bending can be in a straight line with straight articulated subassembly, like this when pressing from both sides tight work piece, the work piece is through the conduction to clamping component's reaction force, trun into the roof pressure of one side of straight articulated subassembly fifty percent discount articulated subassembly, because it is located a straight line, can form stable mechanics structure, the realization mechanism auto-lock, ensure after the cylinder is gassed absolutely, the work piece still can be in by the tight state of clamp, can not lead to the work piece to drop and cause the incident.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the main body of the present invention;

fig. 3 is a schematic structural view of the connecting block of the present invention;

in the figure:

1. the corner seat, 2, the work piece fixing base, 3, first articulated seat, 4, the articulated seat of second, 5, the cylinder, 6, the articulated subassembly of bending, 7, straight articulated subassembly, 8, compress tightly the subassembly, 9, the connecting block, 91, the connecting block body, 92, the hinge hole, 93, spacing guiding hole, 94, spacing hole, 10, spacing guide bar.

Detailed Description

The principles and features of the present invention will be described with reference to the drawings, which are provided for illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1 and 2, the utility model relates to an embodiment's a auto-lock hold-down mechanism, including angle seat 1, cylinder 5 and

clamping component

8, 1 top one side of angle seat is the work piece fixed area, the cylinder body of cylinder 5 articulates the one end of keeping away from the work piece fixed area.

This embodiment the angle seat 1 is located the other fixed first articulated seat 3 that is provided with of work piece fixed area, 1 top of angle seat, be located and fixedly be provided with the articulated seat 4 of second between first articulated seat 3 and the 5 pin joints of cylinder. The first and second articulated

seats

3, 4 may be integrally formed with the corner seat 1.

The self-locking pressing mechanism of the embodiment further comprises a bending hinge assembly 6 and a flat hinge assembly 7; the bending hinge assembly 6 is L-shaped, and two ends and a bending point of the bending hinge assembly are respectively provided with three hinge points; two ends of the straight hinge assembly 7 are provided with two hinge points. The upper end and the lower end of the bending hinge assembly 6 are hinged to the output end of the air cylinder 5 and the second hinge seat 4 respectively, and one end of the straight hinge assembly 7 is hinged to a bending point of the bending hinge assembly 6.

The clamping component 8 of the present embodiment is disposed above the workpiece fixing area, two hinge points are disposed at the tail end of the clamping component along the vertical direction, the hinge point at the upper side is hinged to the other end of the straight hinge component 7, and the hinge point at the lower side is hinged to the first hinge seat 3.

The arrangement positions of the parts and the hinge points of the self-locking pressing mechanism of the embodiment need to ensure that the two hinge points of the straight hinge assembly 7 and the hinge point of the second hinge seat 4 are in the same straight line when the clamping assembly 8 presses the workpiece.

Above-mentioned structural design of this embodiment, when the work piece is fixed, cylinder 5 starts, promotes the piston rod operation to drive the articulated subassembly 6 of bending, and then drive straight articulated subassembly 7, and then drive clamping component 8 motion, because the articulated restriction of clamping component 8 and first articulated seat 3, clamping component 8 can only follow the pin joint and rotate, thereby presss from both sides the work piece fastening area of fixing at angle seat 1 with the work piece.

And at this time, the two hinge points of the straight hinge assembly 7 and the hinge point of the second hinge base 4 are in the same straight line. Thus, the reaction force generated by the workpiece due to clamping pushes the clamping component 8, thereby forming a pushing force of the straight hinge component 7 against a straight edge of the bent hinge component 6. Because straight articulated subassembly 7 and the articulated subassembly 6 that bends are on same straight line always, and the top thrust is born by the pin joint of second articulated seat 4, forms the balanced stable structure of power, and whole hold-down mechanism is because the balanced auto-lock of power, even the cylinder 5 cuts off the gas, also can ensure that clamping assembly 8 is in the state of compressing tightly the work piece always. Therefore, when the air cylinder 5 is cut off, the workpiece can still be clamped and fixed, and the workpiece cannot be separated from the air cylinder to cause safety accidents.

In the above embodiment, the present invention can be further modified as follows. In the improvement scheme, a workpiece fixing seat 2 is arranged at the position, located at the workpiece fixing area, of the corner seat 1.

Adopt above-mentioned further optional improvement, set up work piece fixing base 2, can dispose work piece fixing base 2 according to the shape of work piece, ensure that the fixed more firm to the work piece.

In the above embodiment, the present invention can be further modified as follows. In a development, the clamping assembly 8 is "L" or "T" shaped.

By adopting the further optional improvement, after the shape of the clamping component 8 is set to be L-shaped or T-shaped, the structure is more reasonable, and the self-locking of the mechanism can be ensured.

As shown in fig. 1 and 3, the present invention has another embodiment, which is basically the same as the first embodiment in structure, except that an auxiliary assembly is added to ensure self-locking.

In this embodiment, auto-lock hold-down mechanism still includes connecting block 9, connecting block 9 is arranged between first articulated seat 3 and the articulated seat 4 of second, the top of connecting block 9 is articulated with the point of bending of the articulated subassembly 6 of bending, connecting block 9 bottom is connected with angle seat 1 top through spacing direction subassembly to ensure that connecting block 9 can only slide along vertical direction relative to angle seat 1.

This embodiment has set up connecting block 9 to adopt spacing direction subassembly and corner seat 1 top to be connected, ensure that connecting block 9 can only slide along vertical direction relatively corner seat 1. When the mechanism runs, the connecting block 9 moves along the fixed direction under the action of the limiting guide assembly, so that when the mechanism is self-locked, the connecting block 9 can generate large interaction force between the workpiece reaction force and the limiting guide assembly and further lock with the limiting guide assembly due to the large interaction force, at the moment, the connecting block 9 can stably support the bending hinge assembly 6, and the whole mechanism is assisted to form more stable self-locking.

In the above embodiment, the present invention can be further modified as follows. In the improvement scheme, spacing guide assembly is spacing guide bar 10, spacing guide bar 10 fixed mounting is at 1 top of corner seat, the hole of 9 bottoms of connecting block with spacing guide bar 10 looks adaptations is seted up.

Adopt above-mentioned further optional improvement to spacing guide bar 10 is spacing direction subassembly to set up the hole cooperation of adaptation with it, can form the auto-lock through the frictional force between spacing guide bar 10 and the hole when the mechanism auto-lock, and the locking is more firm.

In the above embodiment, the present invention can be further modified as follows. In a development, the connecting piece 9 is L-shaped or T-shaped.

Further optionally, at least two limiting guide rods 10 are arranged, and a limiting hole 94 and a limiting guide hole 93 which are matched with the limiting guide rods 10 are respectively formed in the bottom end of the long straight part above the connecting block 9 and the side of the bottom of the connecting block.

By adopting the further optional improvement, the plurality of limiting guide rods 10 are arranged, and after the shape and the structure of the connecting block 9 are optimized, the connecting block 9 and the limiting guide rods 10 can be further ensured to be locked more stably when the mechanism is self-locked.

For example, as shown in fig. 3, the connecting block 9 is shaped like a "T", and a limiting hole 94 and two limiting guide holes 93 are respectively formed at the bottom end and two sides of the bottom of the upper long straight portion. And three limiting guide rods 10 are arranged at the top of the angle seat 1 and matched with the three holes. When the mechanism is self-locked, a large friction force is formed between the three holes and the three limiting guide rods 10 under the action of pressure, and then self-locking is achieved, the self-locking force is extremely large at the moment, and the bending hinge assembly 6 can be stably supported.

The utility model discloses a mechanism auto-lock back can only rely on cylinder 5 to ventilate the back again, utilizes its powerful work drive power to relieve the locking of mechanism.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-locking pressing mechanism comprises an angle seat (1), an air cylinder (5) and a clamping assembly (8), wherein a workpiece fixing area is arranged on one side of the top of the angle seat (1), and the air cylinder (5) is hinged to one end far away from the workpiece fixing area; the self-locking pressing mechanism further comprises a bending hinge assembly (6) and a straight hinge assembly (7), the bending hinge assembly (6) is L-shaped, three hinge points are respectively arranged at two ends and a bending point of the bending hinge assembly, two hinge points are arranged at two ends of the straight hinge assembly (7), the upper end and the lower end of the bending hinge assembly (6) are respectively hinged with the output end of the air cylinder (5) and the second hinge seat (4), and one end of the straight hinge assembly (7) is hinged with the bending point of the bending hinge assembly (6); the clamping assembly (8) is arranged above the workpiece fixing area, two hinge points are arranged at the tail end of the clamping assembly in the vertical direction, the upper hinge point is hinged with the other end of the straight hinge assembly (7), and the lower hinge point is hinged with the first hinge seat (3); when the self-locking pressing mechanism presses a workpiece by the clamping assembly (8), two hinge points of the straight hinge assembly (7) and the hinge point of the second hinge seat (4) are in the same straight line.

2. The self-locking hold-down mechanism of claim 1, wherein: the corner seat (1) is provided with a workpiece fixing seat (2) at the workpiece fixing area.

3. The self-locking pressing mechanism according to claim 1, wherein: the clamping component (8) is L-shaped or T-shaped.

4. The self-locking hold-down mechanism of claim 1, wherein: the self-locking pressing mechanism further comprises a connecting block (9), the connecting block (9) is arranged between the first hinged seat (3) and the second hinged seat (4), the top of the connecting block (9) is hinged to a bending point of the bending hinged component (6), and the bottom of the connecting block (9) is connected with the top of the angle seat (1) through a limiting guide component so as to ensure that the connecting block (9) can only slide along the vertical direction relative to the angle seat (1).

5. The self-locking pressing mechanism according to claim 4, wherein: the limiting guide assembly is a limiting guide rod (10), the limiting guide rod (10) is fixedly installed at the top of the angle seat (1), and a hole matched with the limiting guide rod (10) is formed in the bottom of the connecting block (9).

6. The self-locking hold-down mechanism of claim 5, wherein: the connecting block (9) is L-shaped or T-shaped.

7. The self-locking hold-down mechanism of claim 6, wherein: spacing guide bar (10) are equipped with two at least, spacing hole (94) and spacing guiding hole (93) with spacing guide bar (10) looks adaptation are seted up respectively to the long straight portion bottom of connecting block (9) top and connecting block (9) bottom side.