DE20308742U1 - Automotive bodywork repair tool has hammer weight sliding along externally-anchored shaft to end-stop - Google Patents

Abstract

An automotive bodywork repair tool (1) consists of a shaft (10) with a sliding hammer head (2), an end-stop (11) and a screw-fit concave-ended fixture (3). The assembled tool is presented with the concave surface to a bodywork dent filled with fast-hardening hotmelt glue. Following the hardening process, the dent is extracted by repeated application of the hammer head to the end-stop (11).

Description

WANG, Kun-Wang . 17217

Taiwan

Slide hammer puller for body panel

The invention relates to a slide hammer extraction device for body sheet metal.

The object of the invention is to create a slide hammer puller for bodywork sheet metal, with the help of which it is possible to repair dents in the bodywork sheet metal without having to remove interior parts and accessories of a vehicle.

The subject matter of the invention is the sliding hammer extraction device specified in claim 1.

The invention is explained in more detail below in conjunction with the drawings, in which:

Fig. 1 is a perspective view of a slide hammer puller for body sheet metal according to the invention in an exploded state;

Fig. 2 is a longitudinal section through an assembled slide hammer puller for body sheet metal according to the invention;

Fig. 3 is a schematic representation of the operation of the slide hammer puller for body sheet metal according to the invention in a first embodiment; Fig. 4 is a schematic representation of the operation of the slide hammer puller for body sheet metal according to the invention in a second embodiment; Fig. 5 is a schematic representation of the operation of the slide hammer puller for body sheet metal according to the invention in a third embodiment and Fig. 6 is a perspective view of a part of the slide hammer puller for body sheet metal according to the invention.

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finding with a pulling head in an alternative embodiment, which can also be equipped with a rod and a sliding hammer and is suitable for removing dents from larger areas of bodywork. 5

A slide hammer extraction device for body sheet metal according to the invention consists, as shown in Figure 1, mainly of a driven pull rod 1, a slide hammer 2 and at least one pulling head 3.

The driven pull rod 1 has a shaft 10 in the form of a long rod. The shaft 10 is formed with a handle 11 at one end and with a connecting part 13 in the form of a rod-shaped threaded portion at the other end. A stop 12 with a larger diameter is formed on the inside of the handle 11.

The slide hammer 2 can be moved over the shaft 10 of the driven pull rod and has an axial passage 20 and has a front surface 21 with a larger diameter at one end, which fits with the stop 12 of the driven pull rod 1.

Each pulling head 3 is connectable to one end of the driven pull rod 1 and has a connecting portion 30 with an internal thread on one end surface which mates with the connecting part 13 of the driven pull rod and a concave surface 31 on the other end surface. The pulling heads 3 are available in different sizes so that they can engage with different dent surfaces in body panels 4 for dent removal.

For assembly, the driven pull rod 1 is first guided through the slide hammer 2 as shown in Figures 1 to 5, with the front side 21 of the hammer facing the stop 12 of the attached

driven pull rod 1. Thereafter, one of the pulling heads 3 of appropriate size is selected and connected to the connecting part 13 of the driven pull rod 1, whereby the slide hammer puller for body panel according to the invention is assembled.

When a dent or bulge of a body panel 4 is to be pulled outward, the concave surface of the pulling head 3 is placed on the dent in the body panel 4, as shown in Figure 2, and the space between the periphery of the concave surface 31 of the pulling head 3 and the cavity of the dent in the body panel 4 is filled with hot melt adhesive 5 until the hot melt adhesive 5 oozes out over the periphery of the pulling head 3, as shown in Figure 3. After the hot melt adhesive 5 has dried, the pulling head 3 and the body metal 4 are bonded together. At this time, the driven pull rod 1 can be held with one hand and the other hand can be used to strike the slide hammer 2 towards the stop 12 of the driven pull rod 1, whereby the driven pull rod 1 can exert pulling movements on the stop 12 of the driven pull rod 1 under the impact forces of the hammer face 21, so that the pulling head gradually pulls the dent of the body panel 4 outwards, as shown in Figure 4. When the dent of the body panel 4 has been pulled outwards to such an extent that it assumes its smooth normal position, the hot-melt adhesive 5 can be cut through, i.e. the body panel 4 and the pulling head 3 can be separated from each other with a cutting tool 6, as shown in Figure 5. The body panel can then be further treated by grinding, polishing and painting.

Another traction head 3' with a slightly different structure has a connecting portion 30' with an internal thread on an end surface of the traction head 3' for connection to the connecting part 13 of the driven traction rod 1 and a

concave surface 31' with larger outer diameter on the other end surface of the pulling head 3' for pulling out larger areas of a dented body part 4, as shown in Figure 6.
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Claims (4)

1. Slide hammer extraction device for body panels, comprising
a driven pull rod, which consists of an elongated shaft, a stop at a suitable point on the shaft and a connecting part at one end of the shaft,
marked by
a slide hammer ( 2 ) which surrounds the shaft ( 10 ), a passage ( 20 ) in the form of an axial opening of the slide hammer ( 2 ), a front side ( 21 ) at one end of the slide hammer ( 2 ) which cooperates with the stop ( 12 ) of the driven pull rod ( 1 ) and is designed accordingly and
at least one pulling head ( 3 ) which can be connected to one end of the driven pulling rod ( 1 ), each pulling head ( 3 ) having a connecting section ( 30 ) for connection to the connecting part ( 13 ) of the driven pulling rod ( 1 ). 2. A slide hammer puller for body panels according to claim 1, characterized in that a handle ( 11 ) is formed at one end of the shaft ( 10 ) and the stopper ( 12 ) is formed on the end surface of the inside of the handle ( 11 ). 3. Slide hammer puller for body panels according to claim 1, characterized in that the connecting part ( 13 ) of the driven pull rod ( 1 ) is designed in the form of a rod-shaped extension provided with an external thread and the connecting section ( 30 ) of each of the pulling heads ( 3 ) is provided with an internal thread which corresponds to the external thread of the connecting part ( 13 ) of the shaft ( 10 ). 4. Slide hammer puller for body sheet according to claim 1, characterized in that a concave surface ( 31 ) is formed on the end face of each of the pulling heads ( 3 ) which is opposite to the connecting portion ( 30 ) of each of the pulling heads ( 3 ), and that pulling heads ( 3 ) of different sizes can be connected to the connecting portion ( 30 ) of the shaft ( 10 ) according to the size of the body parts to be repaired.