CN215432162U - Pressing mechanism - Google Patents

Abstract

The utility model discloses a pressing mechanism which comprises an air cylinder, a pressing device and a fixing plate, wherein the air cylinder drives the pressing device to move through a telescopic rod; the pressing device is of a central symmetrical structure and forms an accommodating space; the cylinder drives the pressing device to move into the accommodating space through a telescopic rod; the pressing device comprises a supporting seat and a plurality of clamping jaws, and the clamping jaws are movably connected with the supporting seat; the supporting seat is fixed at the top end of the telescopic rod. By adopting the technical scheme of the utility model, the narrow space of the vehicle body part can be effectively utilized to finish the compression and fixation; the three arc-shaped pressing arms are uniformly distributed, can be tightly attached to a workpiece, and are balanced in stress points, so that the workpiece is prevented from shifting and being clamped in place.

Description

Pressing mechanism

Technical Field

The utility model relates to the field of motor vehicle welding, in particular to a pressing mechanism.

Background

Welding, also known as fusion, welding, is a manufacturing process and technique for joining metals or other thermoplastic materials, such as plastics, in a heated, high temperature or high pressure manner. The welding of body parts in the process of machining a motor vehicle requires the fixing of a hold-down mechanism.

However, on one hand, when a vehicle body part is welded, a pressing surface on a pressing block of a pressing mechanism used in the prior art cannot be effectively attached to the workpiece, so that the workpiece is easy to shift, and clamping is not in place. On the other hand, because the space of the car body part is narrow and small, the pressing mechanism used in the existing welding process is mostly large equipment, and cannot be pressed or even used in the narrow space.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a pressing mechanism which can effectively attach a welding workpiece and maximally utilize the welding space.

In order to achieve the purpose, the utility model provides the following technical scheme:

a pressing mechanism comprises an air cylinder, a pressing device and a fixing plate, wherein the air cylinder drives the pressing device to move through a telescopic rod, the air cylinder and the pressing device are respectively arranged on two sides of the fixing plate, and the telescopic rod penetrates through the center of the fixing plate; the pressing device is of a central symmetrical structure and forms an accommodating space; the cylinder drives the pressing device to move into the accommodating space through a telescopic rod; the pressing device comprises a supporting seat and a plurality of clamping jaws, and the clamping jaws are movably connected with the supporting seat; the supporting seat is fixed at the top end of the telescopic rod.

Furthermore, a fixing hole is formed in the center of the supporting seat, the telescopic rod is fixed in the fixing hole, and the supporting seat can move along with the telescopic rod.

Furthermore, a plurality of fixing frames are vertically and fixedly arranged on the fixing plate, the fixing frames are L-shaped, and the clamping jaws are fixed in the fixing frames.

Furthermore, the clamping jaw comprises a fixed arm, a pressing arm and a linkage rod, the fixed arm is fixed on the fixed frame, two ends of the linkage rod are movably connected with the supporting seat and the pressing arm respectively, and one end of the pressing arm is movably connected with the fixed arm;

the telescopic rod pushes the linkage rod to move, the linkage rod drives the pressing arm to swing, and the fixed arm limits the displacement of the pressing arm.

Furthermore, the pressing arm is arc-shaped, the pressing arm is hinged to the supporting seat, and the linkage rod is hinged to the fixed arm and the pressing arm respectively.

Furthermore, one end of the pressing arm is provided with a hinged end, the linkage rod is hinged to the outer end of the hinged end, and the fixed arm is hinged to the inner end of the hinged end.

Further, the supporting seat is circular, and the outer circumference evenly is equipped with a plurality of links, compress tightly the arm with the link is articulated.

Furthermore, the clamping jaws are three and are uniformly distributed on the fixing plate.

Through the technical scheme, the utility model can realize the following technical effects: the narrow space of the vehicle body part can be effectively utilized to finish the compression and fixation; the three arc-shaped pressing arms are uniformly distributed, can be tightly attached to a workpiece, and are balanced in stress points, so that the workpiece is prevented from shifting and being clamped in place.

Drawings

Fig. 1 is a schematic front view of the structure of the embodiment of the present invention.

Fig. 2 is a schematic top view of the embodiment of the present invention.

Fig. 3 is a schematic bottom view of the embodiment of the utility model.

Fig. 4 is a schematic view of a three-jaw structure according to an embodiment of the present invention.

Fig. 5 is a schematic view of a claw structure according to an embodiment of the present invention.

FIG. 6 and FIG. 5 are schematic views of linkage rods according to embodiments of the present invention.

Reference numerals: 1, a cylinder; 2, fixing a plate; 3, fixing a frame; 4 a first jaw; 5 a second jaw; 6 a third jaw; 7, a telescopic rod; 8, supporting a seat; 9 a pressing device; 10 an accommodating space; 41 a first fixed arm; 42 a first hold-down arm; 43 a first linkage bar; 51 a second fixed arm; 52 a second hold-down arm; 53 second linkage rod; 61 a third fixed arm; 62 a third hold-down arm; 63 a third linkage rod; 81 connecting ends; 82 fixing holes; 411 a first fixed hinged end; 421 a first press arm hinged end; 431 a first clamping hinge end; 432 first support hinged end.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Referring to fig. 1, the present embodiment includes a cylinder 1, a pressing device 9 and a fixing plate 2, the cylinder 1 drives the pressing device 9 through an expansion link 7, the cylinder 1 and the pressing device 9 are respectively disposed on the upper and lower sides of the fixing plate 2, the expansion link 7 passes through the center of the fixing plate 2, and the pressing device 9 is fixedly connected to the expansion link 7.

A plurality of fixing frames 3 are vertically and fixedly arranged on the fixing plate 2, the fixing frames 3 are L-shaped, and the pressing device 9 is detachably fixed in the fixing frames 3.

Referring to fig. 2, the pressing device 9 includes a supporting base 8 and a plurality of clamping jaws, the clamping jaws are movably connected to the supporting base 8, the supporting base 8 is fixed to the top end of the telescopic rod 7, and an accommodating space is formed between the clamping jaws. Preferably, there are three jaws identical in structure and working principle, a first jaw 4, a second jaw 5 and a third jaw 6.

Referring to fig. 3, the fixing plate 2 is in an equilateral triangle shape, and the fixing frame 3 is uniformly distributed and the first clamping jaw 4, the second clamping jaw 5 and the third clamping jaw 6 on the fixing plate 2 are respectively fixed in the fixing frame 3.

The supporting seat 8 is circular, three connecting ends 81 are uniformly arranged on the outer circumference of the supporting seat, and the first clamping jaw 4, the second clamping jaw 5 and the third clamping jaw 6 are respectively connected with the connecting ends 81 in a pin mode.

The center of the supporting seat 8 is provided with a fixing hole 82, the telescopic rod 7 is fixed in the fixing hole 82, and the supporting seat 8 can move along with the telescopic rod 7.

Referring to fig. 4, the first jaw 4 includes a first fixing arm 41, a first pressing arm 42 and a first linkage rod 43, and similarly, the second jaw 5 includes a second fixing arm 51, a second pressing arm 52 and a second linkage rod 53, and the third jaw 6 includes a third fixing arm 61, a third pressing arm 62 and a third linkage rod 63.

The first fixing arm 41 is detachably fixed to the fixing frame 3. Preferably, the first fixing arm 41 is pinned to the fixing frame 3.

Two ends of the first linkage rod 43 are movably connected with the supporting seat 8 and the first pressing arm 42 respectively, and one end of the first pressing arm 42 is movably connected with the first fixing arm 41. Preferably, the first pressing arm 42 is hinged to the supporting seat 8, and the first linkage rod 43 is hinged to the first fixing arm 41 and the first pressing arm 42 respectively.

The telescopic rod 7 pushes the first linkage rod 43, the second linkage rod 53 and the third linkage rod 63 to move, the first linkage rod 43, the second linkage rod 53 and the third linkage rod 63 respectively drive the first pressing arm 42, the second pressing arm 53 and the third pressing arm 63 to swing, and the first fixing arm 41, the second fixing arm 51 and the third fixing arm 63 respectively limit the displacement of the first pressing arm 42, the second pressing arm 53 and the third pressing arm 63.

The first pressing arm 42, the second pressing arm 52 and the third pressing arm 62 are oppositely arranged and rotate towards the center to clamp the workpieces to be welded.

Referring to fig. 5 and 6, the first pressing arm 42 is arc-shaped, and one end of the first pressing arm 42 is provided with a first pressing arm hinge end 421.

The first linkage rod 43 is H-shaped, a first clamping hinged end 431 and a first supporting hinged end 432 are respectively arranged at two ends of the first linkage rod, the first clamping hinged end 431 is hinged to the first pressing arm 42, and the first supporting hinged end 432 is hinged to the connecting end 81.

The first linkage rod 43 is hinged at the connection of the first pressing arm hinged end 421 and the first pressing arm 42.

The first fixing arm 41 is provided with a first fixing hinged end 411, and the first fixing hinged end 411 is hinged to the top end of the first pressing arm hinged end 421.

The working principle is as follows:

the cylinder 1 works to push out the telescopic rod 7, as shown in fig. 1, which is in an open state in this embodiment. A workpiece to be welded is placed in an accommodating space 10 formed by a first clamping jaw 4, a second clamping jaw 5 and a third clamping jaw 6, an air cylinder 1 is deflated, a telescopic rod 7 is retracted, a supporting plate 8 is displaced along with the air cylinder, a first linkage rod 43, a second linkage rod 53 and a third linkage rod 63 are driven to move, and a first pressing arm 42, a second pressing arm 53 and a third pressing arm 63 respectively rotate by taking a first clamping hinged end 431, a second clamping hinged end and a third clamping hinged end as the center of the axial accommodating space 10 until the workpiece is clamped.

This embodiment is directed against the narrow and small welding space in space, as long as can hold this embodiment and can accomplish follow-up tight weldment work of clamp, need not further space.

In the embodiment, multiple welding devices can be used in a combined mode, and the clamping and fixing can be completed by adopting the cooperative operation of the multiple welding devices for large-sized welding workpieces.

The drawings are only for purposes of illustrating the utility model and are not to be construed as limiting the scope of the utility model, which is intended to cover all modifications, equivalents, and alternatives falling within the scope of the utility model as defined by the claims and the drawings.

Claims (9)

1. A hold-down mechanism, its characterized in that: the clamping device comprises an air cylinder (1), a pressing device (9) and a fixing plate (2), wherein the air cylinder (1) and the pressing device (9) are respectively arranged on two sides of the fixing plate (2), and a telescopic rod (7) of the air cylinder (1) penetrates through the center of the fixing plate (2);

the pressing device (9) comprises a supporting seat (8) and a plurality of clamping jaws (4,5,6), and the clamping jaws (4,5,6) are movably connected with the supporting seat (8);

the supporting seat (8) is fixed at the top end of the telescopic rod (7);

clamping jaw (4,5,6) distribute in on fixed plate (2), accommodation space (10) is formed at the center, cylinder (1) drive clamping jaw (4,5,6) to accommodation space (10) internal rotation.

2. The hold-down mechanism of claim 1, wherein: the supporting seat (8) is provided with a fixing hole (82) in the center, the telescopic rod (7) is fixed in the fixing hole (82), and the supporting seat (8) can move along with the telescopic rod (7).

3. The hold-down mechanism of claim 1, wherein: a plurality of fixing frames (3) are vertically and fixedly arranged on the fixing plate (2), the fixing frames (3) are L-shaped, and the clamping jaws (4,5 and 6) are fixed in the fixing frames (3).

4. The hold-down mechanism of claim 3, wherein: the clamping jaws (4,5 and 6) comprise fixing arms (41), pressing arms (42) and linkage rods (43), the fixing arms (41) are fixed on the fixing frame (3), two ends of each linkage rod (43) are movably connected with the supporting seat (8) and the pressing arm (42) respectively, and one end of each pressing arm (42) is movably connected with the fixing arm (41);

the telescopic rod (7) pushes the linkage rod (43) to move, the linkage rod (43) drives the pressing arm (42) to swing, and the fixed arm (41) limits the displacement of the pressing arm (42).

5. The hold-down mechanism of claim 4, wherein: the pressing arm (42) is arc-shaped, the pressing arm (42) is hinged to the supporting seat (8), and the linkage rod (43) is hinged to the fixing arm (41) and the pressing arm (42) respectively.

6. The hold-down mechanism of claim 5, wherein: the supporting seat (8) is circular, a plurality of connecting ends (81) are evenly arranged on the outer circumference of the supporting seat, and the pressing arm (42) is hinged to the connecting ends (81).

7. The hold-down mechanism of claim 6, wherein: one end of the pressing arm (42) is provided with a pressing arm hinged end (421), the fixed arm (41) is provided with a fixed hinged end (411), and the fixed hinged end (411) is hinged to the top end of the pressing arm hinged end (421); the linkage rod (43) is hinged to the joint of the pressure arm hinged end (421) and the pressing arm (42).

8. The hold-down mechanism of claim 7, wherein: the linkage rod (43) is H-shaped, two ends of the linkage rod are respectively provided with a clamping hinged end (431) and a supporting hinged end (432), the clamping hinged end (431) is hinged to the joint of the pressing arm hinged end (421) and the pressing arm (42), and the supporting hinged end (432) is hinged to the connecting end (81).

9. The hold-down mechanism of any one of claims 1 to 8, wherein: three clamping jaws (4,5,6) are arranged.

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