TWI400147B - Drawing tool - Google Patents

Description

Extraction device

The present invention relates to an extraction device, and more particularly to a device having a high structural strength and variable use.

The extraction device is widely used for removing the workpiece, and the conventional extraction device comprises a frame, a plurality of hooks, a plurality of connecting rods and a working rod, the frame has a screw hole and a plurality of extension portions, each of the hook portions has a hook The claws, the opposite ends of each of the connecting rods are respectively pivotally connected to one of the extending portions and one of the hook portions, and the opposite ends of the working rod respectively have a top portion for abutting against the workpiece and an operating portion, the abutting top portion A screw segment is screwed between the operating portions and the screw hole. When the operating portion is rotated, the working rod rotates relative to the frame and moves, and the hooks can pull up the workpiece to be removed.

However, the above extraction device has many drawbacks. First, during the rotation process, the hook portion will abut against the free end of the extension portion, and is affected by the strong torsion force, and the hook portion is easily pulled relative to the frame, thereby causing poor work efficiency or even damage to the part. In addition, since the hook portion, the connecting rod and the frame system can pivot freely relative to each other, the hook portion often hangs downwards inwardly, and the hook portions need to be pulled apart when the hook portion is hooked on the workpiece. It is quite inconvenient, and any swaying hooks are more dangerous.

In addition, conventional extraction devices are of a fixed size and may not be able to be removed for workpieces of different sizes.

The main object of the present invention is to provide an extraction device which has good structural strength and stability, is more capable of adjusting the direction and length, and can prevent the hook from being randomly shaken.

In order to achieve the above object, the present invention provides an extraction device comprising a frame, a plurality of hooks, a plurality of connecting rods and a working rod.

The frame has a screw hole and a plurality of extending arms, and the extending arms respectively extend in different directions, and each of the extending arms has a first pivoting portion and an abutting portion, and the abutting portion is located at one of the extending arms. The end includes an abutment groove, and each of the abutment grooves has a positioning mechanism.

Each of the hooks has at least one claw portion and a second pivot portion. The claw portion is located at one end of the hook member. Preferably, each hook member has two claw portions respectively located at opposite ends of the hook member. The second pivoting portion includes a first pivot hole and a second pivot hole, and the first pivot hole and the second pivot hole are arranged along the length direction of the hook.

The opposite ends of each of the connecting rods are respectively pivotally connected to one of the first pivoting portions and one of the second pivoting portions.

Wherein, when each of the hook members abuts against one of the abutment grooves, the corresponding extension arm is wrapped to at least half of the width of the hook member, and one of the hook members is positioned by the positioning mechanism The hook cannot be freely detached from the abutment slot.

The working rod has an operating portion and an abutting top at opposite ends thereof, and a screw segment is arranged between the operating portion and the abutting top, and the working rod is screwed with the screw hole of the frame by the screw portion thereof.

With the above structure, when performing the work of grasping and rotating, each hook is subjected to the Relying on the restriction of the groove without twisting, ensuring the stability of the grab and avoiding damage to the parts. In addition, the hooks can provide various lengths and adjustments of the ticking manner, which is convenient for different use occasions.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to FIG. 1 to FIG. 7 and FIG. 7A, the present invention provides an extraction device comprising a frame 1, a plurality of hooks 2, a plurality of connecting rods 3 and a working rod 4.

The frame 1 has a screw hole 11 and a plurality of extending arms 12. The screw holes 11 are located at the center of the frame 1. The extending arms 12 extend outwardly around the screw holes 11. Each of the extending arms 12 has a first a pivoting portion and an abutting portion, the first pivoting portion includes a pivoting hole 121, the abutting portion is located at a free end of the extending arm 12 and includes an abutting groove 122, each of the abutting grooves 122 having A positioning mechanism 123, in the main embodiment of the present invention, the positioning mechanism 123 includes a receiving hole 1231, an elastic member 1232 and a positioning bead 1233. The outer diameter of the positioning bead 1233 is larger than the inner diameter of the receiving hole 1231. The elastic member 1232 and the positioning bead 1233 are located in the receiving hole 1231. The elastic member 1232 is abutted between the bottom of the hole 1231 and the positioning bead 1233 so that the positioning bead 1233 has the abutting groove 122. The trend of movement.

Each of the hooks 2 has at least one claw portion 21a and a second pivot portion 22, the claw portion 21a is located at one end of the hook member 2, and the second pivot portion 22 includes a first pivot hole 221 and a a second pivot hole 222, the first pivot hole 221 and the second The pivot hole 222 is arranged along the length direction of the hook member 2, wherein the distance between the first pivot hole 221 of the hook member 2 and the claw portion 21a is a, and the distance between the second pivot hole 222 and the claw portion 21a is b. a and b are different from each other. In the main embodiment of the present invention, each of the hooks 2 has two claw portions 21a, 21b respectively located at opposite ends of the hook member 2, and the two claw portions 21a, 21b are respectively hooked toward different sides of the hook member 2 The distance between the first pivot hole 221 and the two claw portions 21a and 21b is c and d, respectively. The distance between the second pivot hole 222 and the two claw portions 21a and 21b is e and f, c, d, respectively. , e and f are different from each other, as shown in Fig. 7, wherein the distances c and e are substantially equivalent to the above-mentioned distances a and b, respectively.

The opposite ends of the connecting rods 3 are respectively pivotally connected to one of the first pivoting portions and one of the second pivoting portions 22 thereof. More specifically, the connecting rods 3 respectively have a connecting hole 31 at opposite ends thereof. The connecting hole 31 and its corresponding pivot hole 121, the first pivot hole 221 or the second pivot hole 222 are passed through by a pivot member 32, so that the connecting rod 3 can pivot relative to the extending arm 12 or the hook 2.

The working rod 4 has an operating portion 41 and an abutting portion 42 at opposite ends thereof, and a screw segment 43 is formed between the operating portion 41 and the abutting portion 42. The working rod 4 has a screw hole 43 and a screw hole of the frame. 11 screwing. In the main embodiment of the present invention, the operating portion 41 has a polygonal column shape, such as a hexagonal column shape, for the rotation of the tool such as a wrench, and the abutting portion 42 is provided to abut against the fixed portion 51 of the workpiece 5.

Wherein, when each of the hooks 2 abuts against one of the abutting grooves 122, the corresponding extending arm 12 is wrapped to at least half of the width of the hook 2, and the hook 2 The positioning portion is positioned by the positioning mechanism 123 so that the hook 2 cannot be freely detached from the abutting groove 122. Preferably, the positioning portion is a recess 23 for the positioning bead 1233 to abut. The hook 2 extends in the longitudinal direction.

In actual use, as shown in FIG. 2, the abutting portion 42 of the working rod 4 abuts against the fixed portion 51 of a workpiece 5, and the claw portion 21a of each hook member 2 hooks the portion to be extracted of the workpiece 5. 52. By rotating the operating portion 41, the screw segment 43 and the screw hole 11 are relatively rotated and moved, and the claw portions 21a can lift the workpiece to be extracted portion 52 and pull it away from the fixing portion 51.

It is worth mentioning that, because the frame is subjected to a relatively large torque, especially when the workpiece is difficult to extract, and the hook and the extension arm are only pivoted by the connecting rod, the hook is easy to be twisted relative to the extension arm to produce a shear. The force not only reduces the work efficiency, but also causes the parts to be pulled and damaged. However, the extension arm end of the extracting device provided by the present invention has an abutting groove, and the abutting groove further has a positioning mechanism, and the hook member can continue when the drawing work is performed. Abutting against the groove, the side wall of the groove can be prevented from pulling the hook to the left and right, and even the hook can be further assisted, and the positioning mechanism further strengthens the stability of the overall structure to avoid the danger of the hook being shaken at will. .

In addition, since each of the hook members has two pivot holes, and the distances from the pivot holes to the two claw portions are different, this means that if different pivot holes are selected, the pivot rods are pivotally connected, and different claw portions are used. The workpiece can be hooked to provide at least four working lengths to match different sizes of workpieces for optimum performance, and the direction of the claws can be adjusted to face outward or inward, as shown in Figure 8. In order to cooperate with the grasping of the annular workpiece or the disc-shaped workpiece, therefore, the extraction device provided by the invention can provide diversification The use of flexibility,.

In summary, the extraction device provided by the present invention achieves a convenient extraction function with a simple structure, and takes into consideration the stability and durability of the parts, improves work efficiency, reduces danger, and has various working lengths and angles, and can be matched with different The demand for work is actually a progressive effect, in line with the patent requirements stipulated by the national patent law, and the patent application is filed according to law.

1‧‧‧Frame

11‧‧‧ screw holes

12‧‧‧Extension arm

121‧‧‧Pivot hole

122‧‧‧Abutment slot

123‧‧‧ Positioning agency

222‧‧‧Second pivot hole

23‧‧‧ recess

3‧‧‧ Connecting rod

31‧‧‧Connection hole

32‧‧‧ pivot

4‧‧‧Working rod

1231‧‧‧ accommodating holes

1232‧‧‧Flexible parts

1233‧‧‧ positioning beads

2‧‧‧Schedule

21a, 21b‧‧‧ claws

22‧‧‧Second pivotal

221‧‧‧ first pivot hole

41‧‧‧Operation Department

42‧‧‧ arrive at the top

43‧‧‧ screw section

5‧‧‧Workpiece

51‧‧‧Fixed part

52‧‧‧Parts to be taken

Figure 1 is a perspective view of the present invention.

Figure 2 is a schematic view of the use of the present invention.

Figure 3 is a partial exploded perspective view of the present invention.

4 and 5 are schematic views of the operation of the present invention.

6 and 7 are partial side views of the present invention.

Figure 7A is a partial cross-sectional view of Figure 7.

Figure 8 is a side elevational view of another embodiment of the present invention.

1‧‧‧Frame

11‧‧‧ screw holes

12‧‧‧Extension arm

122‧‧‧Abutment slot

2‧‧‧Schedule

21a, 21b‧‧‧ claws

22‧‧‧Second pivotal

221‧‧‧ first pivot hole

23‧‧‧ recess

3‧‧‧ Connecting rod

4‧‧‧Working rod

41‧‧‧Operation Department

42‧‧‧ arrive at the top

43‧‧‧ screw section

Claims (8)

An extracting device comprises: a frame having a screw hole and a plurality of extending arms, each of the extending arms having a first pivoting portion and an abutting portion, the abutting portion being located at a free end of the extending arm And an abutting groove, each of the abutting grooves has a positioning mechanism; a plurality of hooks each having at least one claw portion and a second pivot portion, the claw portion being located at one end of the hook member a plurality of connecting rods, wherein the opposite ends of each connecting rod are respectively pivotally connected to one of the first pivoting portions and one of the second pivoting portions; and a working rod has an operating portion and an abutting top at opposite ends thereof a screw segment is disposed between the operating portion and the abutting top portion, and the working rod is screwed with the screw hole of the frame by the screw portion thereof; wherein, when each of the hook members abuts against one of the abutting grooves, the hook One of the positioning portions is positioned by the positioning mechanism such that the hook member cannot freely disengage from the abutment groove. The picking device of claim 1, wherein the positioning mechanism comprises a receiving hole, an elastic member and a positioning bead, wherein the outer diameter of the positioning bead is larger than the inner diameter of the receiving hole, and the elastic member and the positioning bead are located in the receiving In the hole, the elastic member abuts between the bottom of the receiving hole and the positioning bead to move the positioning bead toward the abutting groove, and the positioning portion is a recess for the positioning bead to abut. The picking device of claim 1, wherein each of the hooks has two claw portions respectively located at opposite ends of the hook member, and the two claw portions are respectively hooked toward different sides of the hook member. The extracting device of claim 1, wherein the second pivoting portion of each of the hooks comprises a first a pivot hole and a second pivot hole, the first pivot hole and the second pivot hole being arranged along a length direction of the hook. The picking device of claim 4, wherein the distance between the first pivot hole of each hook member and the claw portion is a, and the distance between the second pivot hole and the claw portion is b, and a and b are different from each other. The picking device of claim 3, wherein the second pivoting portion of each of the hooks comprises a first pivot hole and a second pivot hole, and the first pivot hole and the second pivot hole are along the length of the hook arrangement. The picking device of claim 6, wherein the distance between the first pivot hole of each hook and the two claw portions is c and d, respectively, and the distance between the second pivot hole and the two claw portions is e and f, respectively. , d, e, and f are different from each other. The extracting device of claim 1, wherein the corresponding extending arm covers at least half of the width of the hook when each of the hook members abuts against one of the abutting grooves.