CN210703365U

CN210703365U - Inner positioning mechanism of cavity part

Info

Publication number: CN210703365U
Application number: CN201921845834.7U
Authority: CN
Inventors: 刘乾高; 向帅驹
Original assignee: Lian Wei Auto Parts Chonqging Co ltd
Current assignee: Lian Wei Auto Parts Chonqging Co ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-06-09
Anticipated expiration: 2029-10-30

Abstract

The utility model discloses an interior positioning mechanism of cavity part, including the base member block, it has the guiding hole to run through on this base member block, runs through on the lateral wall of this base member block has two at least sliding hole, all the sliding hole round guiding hole ring is to distributing, every slide respectively in the sliding hole and wear to be equipped with the location and lean on the piece be equipped with the push-and-pull subassembly in the guiding hole, this push-and-pull subassembly drives all the location is leaned on the piece synchronous slip to stretch out or the adduction is in the base member block. All the positioning abutting blocks are controlled to be retracted through the push-pull assembly, so that the positioning mechanism can easily enter the inner cavity of the part, all the positioning abutting blocks extend out, the supporting surfaces of the positioning abutting blocks abut against the inner wall of the part, the wall of the workpiece is supported from the inside, and the size of the part is not changed in the welding or riveting process.

Description

Inner positioning mechanism of cavity part

Technical Field

The utility model belongs to the frock clamp field, concretely relates to interior positioning mechanism of cavity part.

Background

Sheet metal parts are widely used in the automotive industry. The sheet metal part is formed by punching and primarily forming a plate, and then welding and riveting are carried out to form a final part. For some sheet metal parts, the cross section of the processed sheet metal part is in a U shape or a tubular shape, or other types of parts with closed inner cavities on a certain surface. When the part welds or rivets the seam after punch forming, the positioning and clamping of the part have difficulties: the parts are clamped or pressed from the outer side and supported and positioned from the inner side, however, the traditional pressing or supporting mechanism generally depends on the extension of a piston rod of an air cylinder to drive the abutting mechanism to be linearly pressed, or the air cylinder drives the overturning arm to overturn and press, and the parts are not convenient to position from the inner side. The former extends into the part from the opening of the part, but can not press the part laterally perpendicular to the telescopic direction, and the turning arm of the latter is difficult to enter the closed cavity. The tubular parts are particularly inconvenient to weld, and welding stress can cause deformation of thin-wall sheet metal parts during welding, so that the size of a welded product is changed, the design precision cannot be reached, and the product is scrapped. If a fixed internal support mechanism is used, the size of the internal support mechanism must be strictly matched with the design size of the inner cavity of the part, but the part is difficult to remove after welding is completed. Therefore, it is necessary to design a tool that can easily enter and exit the cavity and support and position the cavity wall.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an interior positioning mechanism of cavity part.

The technical scheme is as follows:

an inner positioning mechanism of a cavity part comprises a base body block, wherein a guide hole penetrates through the base body block, at least two sliding holes penetrate through the side wall of the base body block, all the sliding holes are distributed around the guide hole in the circumferential direction, and a positioning abutting block penetrates through each sliding hole in a sliding mode.

By adopting the design, the positioning mechanism has the advantages that all the positioning abutting blocks are operated through the push-pull assembly to be retracted, so that the positioning mechanism can easily enter the inner cavity of the part, then all the positioning abutting blocks extend out, the supporting surfaces abut against the inner wall of the part, the wall of the workpiece is supported from the inside, and the size of the part is not changed in the welding or riveting process.

As a preferred technical scheme, the push-pull assembly comprises push-pull blocks, the push-pull blocks are arranged in the guide holes in a sliding mode, and wedge mechanisms are arranged between the push-pull blocks and each positioning abutting block respectively.

By adopting the design, the positioning abutting block is controlled by the wedge mechanism, the operation is simple and reliable, and the length of the positioning abutting block extending out of the base block can be controlled by controlling the moving distance of the push-pull block, so that the size of the inner cavity of the workpiece is finely controlled.

As a preferred technical scheme, the wedge mechanism comprises a T-shaped sliding groove and a wedge block which are matched with each other;

the surface of the positioning abutting block facing the push-pull block is provided with the T-shaped sliding groove, the T-shaped sliding groove is a necking groove, and a notch of the T-shaped sliding groove faces the push-pull block;

the push-pull block is provided with the wedge block, the shape of the wedge block is matched with that of the T-shaped sliding groove, and the wedge block is embedded in the T-shaped sliding groove in a sliding mode;

the hole wall of the guide hole is provided with a yielding notch corresponding to each wedge block, and the yielding notches are located at the junction of the guide hole and the hole wall of the sliding hole.

By adopting the design, the wedge block and the T-shaped sliding groove which are matched form a wedge mechanism which is mutually restricted, so that when the push-pull block moves towards one direction, the positioning abutting block extends out, and when the push-pull block moves towards the opposite direction, the positioning abutting block retracts.

As a preferred technical scheme, the surface of the positioning abutting block facing the push-pull block abuts against the push-pull block, the positioning abutting block and the push-pull block are matched through a wedge-shaped surface, and the wedge-shaped surface on the positioning abutting block is parallel to the extending direction of the T-shaped sliding groove.

Design more than adopting, the push-and-pull piece leans on the piece to the location and plays the supporting role, is favorable to leaning on the piece at the location and further keeps its stability when outwards stretching out.

As a preferred technical scheme, the push-pull block is further connected with a positioning push-pull cylinder, a cylinder body of the positioning push-pull cylinder is fixedly connected with the substrate block, a piston rod of the positioning push-pull cylinder extends and retracts in the guide hole along the length direction of the guide hole, and a free end of the piston rod of the positioning push-pull cylinder is connected with the push-pull block.

By adopting the design, the pushing cylinder is positioned to push the push-pull block, so that the automatic control is easy.

As a preferred technical scheme, an anti-falling limiting block is arranged on one side of the push-pull block back to the positioning push-pull cylinder, and the size of the anti-falling limiting block in at least one direction is larger than the aperture of the guide hole.

By adopting the design, the push-pull block is prevented from sliding out of the guide hole.

Preferably, the base block has a rectangular cross section with rounded corners, and the sliding holes are provided in four planar side walls of the base block.

By adopting the design, the positioning device is used for positioning the tubular part with the round-corner rectangular section.

As a preferred technical scheme, the base block is further provided with a dustproof cover, and the dustproof cover covers one end of the base block, which is back to the positioning pushing cylinder;

a through groove is formed in one end, facing the dustproof cover, of the base block, the through groove penetrates through the side wall of the base block, and a notch of the through groove is closed by the dustproof cover to form the sliding hole;

the anti-falling limiting block is located on the inner side of the dustproof cover.

By adopting the design, the dustproof cover is combined with the sliding fit inside the base block to play a role in protection, and the dustproof cover and the through groove are matched to form the sliding hole, so that the manufacturing is facilitated.

Compared with the prior art, the beneficial effects of the utility model are that: all the positioning abutting blocks are controlled to be retracted through the push-pull assembly, so that the positioning mechanism can easily enter the inner cavity of the part, all the positioning abutting blocks extend out, the supporting surfaces of the positioning abutting blocks abut against the inner wall of the part, the wall of the workpiece is supported from the inside, and the size of the part is not changed in the welding or riveting process.

Drawings

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

FIG. 2 is a schematic view of the structure of a substrate block;

fig. 3 is a schematic view of the present invention after the dust cover 11 is removed;

FIG. 4 is a schematic view of the structure of FIG. 3 with the substrate block removed;

FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective;

figure 6 is a schematic view of the wedge mechanism between the push-pull block 6 and the positioning abutment block 5;

fig. 7 is a schematic view of the present invention supporting and positioning the inner cavity of the component.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

As shown in fig. 1, an internal positioning mechanism for a cavity component includes a substrate block 1, a guide hole 2 penetrates through the substrate block 1, at least two sliding holes 3 penetrate through a sidewall of the substrate block 1, all the sliding holes 3 are distributed annularly around the guide hole 2, the sliding holes 3 are radially arranged with a center of the guide hole 2 as a circle center, an inner end of the sliding hole 3 is communicated with the guide hole 2, a positioning abutting block 5 penetrates through each sliding hole 3 in a sliding manner, and a push-pull assembly is arranged in the guide hole 2 and drives all the positioning abutting blocks 5 to synchronously slide and extend out of or retract into the substrate block 1.

The base block 1 is further provided with a dust cover 11, and the dust cover 11 covers one end of the guide hole 2 of the base block 1 in a buckling manner. As shown in fig. 2, a through groove is opened at an end of the base block 1 facing the dust cover 11, the through groove penetrates through a side wall of the base block 1, and a notch of the through groove is closed by the dust cover 11 to form the slide hole 3.

In this embodiment, as shown in fig. 3, the cross section of the substrate block 1 is a rounded rectangle, and the sliding holes 3 are provided one on each of the four-directional planar side walls of the substrate block 1.

As shown in fig. 4 and 5, the push-pull assembly comprises a push-pull block 6 and a positioning push cylinder 10. The positioning pushing cylinder 10 and the dust cover 11 are respectively located at two ends of the guide hole 2.

And at least two substrate columns are arranged at one end of the substrate block 1, which is back to the dust cover 11, and the substrate columns are parallel to the guide holes 2 and distributed around the guide holes 2. The cylinder body of the positioning pushing cylinder 10 is positioned at the free end of the base column and is fixedly connected with the base column.

The piston rod of the positioning pushing cylinder 10 extends and retracts in the guide hole 2 along the length direction of the guide hole 2, and the free end of the piston rod of the positioning pushing cylinder 10 is connected with the push-pull block 6. Specifically, a necking groove is formed in the end face, facing the positioning pushing cylinder 10, of the pushing and pulling block 6, and a hanging nut is arranged at the free end of a piston rod of the positioning pushing cylinder 10 and clamped in the necking groove.

The push-pull block 6 is arranged in the guide hole 2 in a sliding mode, and a wedge mechanism is arranged between the push-pull block 6 and each positioning abutting block 5.

The push-pull block 6 comprises a sliding part and an expansion part, the sliding part is arranged in the guide hole 2 in a sliding mode, one end of the sliding part is connected with the free end of the piston rod of the positioning push-push cylinder 10, the expansion part is arranged at the other end of the sliding part, the expansion part is in a frustum pyramid shape, the smaller end of the expansion part is connected with the sliding part, and the larger end of the expansion part faces the dust cover 11.

As shown in fig. 6, the wedge mechanism includes a T-shaped slide groove 8 and a wedge 7 which are engaged with each other. The surface of the positioning abutting block 5 facing the push-pull block 6 is provided with the T-shaped sliding groove 8, the T-shaped sliding groove 8 is a necking groove, the notch of the T-shaped sliding groove 8 faces the push-pull block 6, and the included angle between the T-shaped sliding groove 8 and the hole center line of the guide hole 2 is not 0 degree or 90 degrees. The wedge 7 is fixed on the expansion part of the push-pull block 6, the shape of the wedge 7 is adapted to the shape of the T-shaped sliding groove 8, and the wedge 7 is embedded in the T-shaped sliding groove 8 in a sliding manner.

In order to make the push-pull block 6 have a sufficiently large stroke range when sliding, as shown in fig. 2, a yielding notch 4 is respectively arranged on the hole wall of the guide hole 2 corresponding to each wedge 7, and the yielding notch is located at the junction of the hole walls of the guide hole 2 and the sliding hole 3, so that when the push-pull block 6 slides in the direction away from the dust cover 11, the yielding notch 4 forms yielding to the wedge 7. The middle part of the dustproof cover 11 protrudes outwards to form an abdicating cavity at the inner side of the dustproof cover, so that the abdicating cavity is right when the dustproof cover 11 slides in the direction, and the abdicating cavity is right for the abdicating of the dustproof cover 6.

An anti-falling limiting block 9 is arranged on one side, back to the positioning pushing cylinder 10, of the pushing and pulling block 6, the anti-falling limiting block 9 is long-strip-shaped, and the length of the anti-falling limiting block 9 is larger than the aperture of the guide hole 2 so as to prevent the pushing and pulling block 6 from excessively sliding. The anti-falling limiting block 9 is positioned on the inner side of the dustproof cover 11.

The positioning abutting block 5 abuts against the push-pull block 6 towards the surface of the push-pull block 6, the positioning abutting block and the push-pull block are matched through a wedge-shaped surface, the expansion parts are respectively provided with a wedge-shaped surface corresponding to each positioning abutting block 5, and the wedge-shaped surfaces of the expansion parts are parallel to the extending direction of the T-shaped sliding groove 8.

When the positioning pushing cylinder 10 pushes the pushing and pulling block 6 to slide towards the direction of the dust cover 11, the wedge block 7 drives the positioning abutting block 5 to be retracted. At this time, the part p to be machined is fitted over the base block 1. The part p is formed by sheet metal into a tubular shape, and the joint to be welded is p 1. Then the piston rod of the positioning pushing cylinder 10 retracts, the pushing and pulling block 6 slides in the direction far away from the dust cover 11, the wedge block 7 pushes the positioning abutting block 5 to slide outwards and extend, and the supporting surface (S surface) of the positioning abutting block 5 extends out of the outer side surface of the base block 1 and supports the inner wall of a part, as shown in fig. 7.

The extending length of the piston rod of the positioning pushing cylinder 10 can be adjusted, and the outward sliding extending distance of the positioning abutting block 5 can be adjusted, so that the size of the inner cavity of the part to be processed can be adjusted and controlled.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims

1. An interior positioning mechanism of cavity part, includes base block (1), has run through guiding hole (2) on this base block (1), has run through on the lateral wall of this base block (1) at least two sliding hole (3), all sliding hole (3) are round guiding hole (2) hoop distribution, slide respectively in each sliding hole (3) and wear to be equipped with the location and lean on piece (5), its characterized in that: a push-pull assembly is arranged in the guide hole (2) and drives all the positioning leaning blocks (5) to synchronously slide and extend out or retract in the base block (1).

2. The internal positioning mechanism for a cavity part of claim 1, wherein: the push-pull assembly comprises push-pull blocks (6), the push-pull blocks (6) are arranged in the guide holes (2) in a sliding mode, and wedge mechanisms are arranged between the push-pull blocks (6) and each positioning abutting block (5) respectively.

3. The internal positioning mechanism for a cavity part of claim 2, wherein: the wedge mechanism comprises a T-shaped sliding groove (8) and a wedge block (7) which are matched with each other;

the surface of the positioning and abutting block (5) facing the push-pull block (6) is provided with the T-shaped sliding groove (8), the T-shaped sliding groove (8) is a necking groove, and a notch of the T-shaped sliding groove (8) faces the push-pull block (6);

the push-pull block (6) is provided with the wedge block (7), the shape of the wedge block (7) is adapted to that of the T-shaped sliding groove (8), and the wedge block (7) is embedded in the T-shaped sliding groove (8) in a sliding manner;

the wedge block (7) is provided with a yielding notch (4) corresponding to each wedge block (7) on the hole wall of the guide hole (2), and the yielding notch is located at the junction of the guide hole (2) and the hole wall of the sliding hole (3).

4. The internal positioning mechanism for a cavity part of claim 3, wherein: the location leans on piece (5) orientation the face of push-and-pull piece (6) leans on push-and-pull piece (6), cooperates with the wedge-shaped surface between the two, the location lean on the wedge-shaped surface on piece (5) with the extending direction of T shape spout (8) is parallel.

5. The internal positioning mechanism for a cavity part of claim 3, wherein: the push-pull block (6) is further connected with a positioning push-pull cylinder (10), a cylinder body of the positioning push-pull cylinder (10) is fixedly connected with the substrate block (1), a piston rod of the positioning push-pull cylinder (10) extends and retracts in the guide hole (2) along the length direction of the guide hole (2), and the free end of the piston rod of the positioning push-pull cylinder (10) is connected with the push-pull block (6).

6. The internal positioning mechanism for a cavity part of claim 5, wherein: an anti-falling limiting block (9) is arranged on one side, back to the positioning pushing cylinder (10), of the pushing and pulling block (6), and the size of the anti-falling limiting block (9) in at least one direction is larger than the aperture of the guide hole (2).

7. The internal positioning mechanism for a cavity part of claim 6, wherein: the section of the base block (1) is in a round corner rectangle shape, and the sliding holes (3) are respectively arranged on the plane side walls of the base block (1) in four directions.

8. The internal positioning mechanism for a cavity part of claim 7, wherein: the base block (1) is also provided with a dustproof cover (11), and the dustproof cover (11) covers one end of the base block (1) back to the positioning pushing cylinder (10);

a through groove is formed in one end, facing the dustproof cover (11), of the base block (1), penetrates through the side wall of the base block (1), and the notch of the through groove is closed by the dustproof cover (11) to form the sliding hole (3);

the anti-falling limiting block (9) is located on the inner side of the dustproof cover (11).