TWI446998B - Ratchet spanner - Google Patents

Description

Ratchet wrench

The present invention relates to a ratchet wrench having a sleeve.

Ratchet wrenches have long been known as a type of wrench. The advantage of this is that there is no need to separate the wrench for repositioning when turning the screw or nut. The wrench must usually be repositioned in a crowded space. There is a ratchet wrench with a change idler and a ratchet wrench that can change the direction of the freewheel, wherein the driven portion passes through one of the openings in the wrench head such that it protrudes on the other side of the wrench head. In order to obtain a non-rotatable and to some extent tension-free connection to the sleeve, the driven portion is guided in a correspondingly formed recess in the sleeve. To this end, the driven portion must be surrounded by a free surface that extends perpendicular to the driven portion. The depth of the recess in the sleeve is fixed. The driven portion protrudes relative to the surface surrounding the driven portion just before the sleeve can be fully inserted into the interior of its recess. The diameter of the surface surrounding the driven portion is determined in the first position by the size of the wrench head, for example, the wrench head must contain an idler and shifting device.

Since the sleeve has only a certain nominal size, it is usually necessary to replace the sleeve. An axially fixed sleeve wherein the pre-stressed ball projects beyond the side of the driven portion and engages a corresponding recess in the wall of the recess in the sleeve. When pulling off the sleeve, the resistance of this action must be overcome. A sleeve having a constant outer diameter, or a sleeve having a diameter that is even reduced from the joint oriented toward the ratchet wrench. In this article, especially when we consider that the assembler may have dirty fingers or gloves, it is often extremely difficult to pull off the sleeve.

The task of the present invention is to provide the possibility of improving the sleeve on the ratchet wrench. To solve this task, the present invention proposes a ratchet wrench having the features cited in claim 1. Embodiments of the invention are subject matter of the dependent art.

Different from the prior art, the connecting surface of the tapered transition section and the sleeve, which is inclined at least downward in the radially outward direction, creates a holding space for the user, so that the user can easily touch the wrench. The junction of the sleeves, and in this way the user can apply the force to pull the sleeve away. To this end, the measures employed on both the ratchet wrench and the sleeve are combined with each other.

The shape of the transition section between the wrench head and the driven portion is preferably convex and/or beveled.

The isolation surface surrounding the driven portion can be formed on the same component that also forms the driven portion. But this does not necessarily need to be the case. It is also possible that the driven portion protrudes through the opening of the partition surface and isolates one portion of the head of the wrench.

The joint facing the ratchet wrench can also be characterized by a bevel on the sleeve.

In particular, it is possible to provide the respective bevels with an angle of between 30 and 60 with the axis of rotation of the ratchet wrench, with an angle of 45 being preferred.

The bevel length may preferably be based on the opposite width of the sleeve and includes a cross section between 1.0 mm for a smaller opposite width and about 1.5 mm for a larger opposite width.

Other features, details, and preferences of the present invention can be derived from the claims and the abstract (the wording and description thereof) and the preferred embodiments of the present invention and based on the following description of the drawings.

In Fig. 1, the wrench head 2 is formed on one end of the grip lever 1, and includes, for example, an idler and a shifting means to change the direction of idling. The wrench head 2 is characterized by two substantially flat sides extending parallel to one another, with one side 3 being assigned to the driven portion and the opposite side 4 containing the actuating element 5 for the shifting device.

A plate 6 rotatable relative to the wrench head 2 is mounted on the side 3 of the wrench head 2 facing the driven portion, the plate 6 being partially engaged with the wrench head 2. This disc 6 is characterized by a flat separating surface 7 on the side facing away from the wrench head 2. The driven portion 8 which forms a single piece with the assembly characterized by the dish 6 is substantially in the middle of the partition surface 7. A sleeve 9 is attached to this driven portion 8. The junction 10 presents a small spacing in front of the face 7 of the assembly featuring the driven portion 8.

The outer edge of the separating surface 7 on the disc member 6 is converted into a bevel 11 which extends at an angle of about 45 with respect to the axis of rotation. Thereby, a transition section occurs between the edge 12 of the wrench head 2 and the heel of the driven portion 8, which bridges the axial spacing in the flat separating surface 7.

Similarly, the ramp 13 extending at an angle of about 45 with respect to the axis of rotation is attached to the radially outer edge of the joint 10 of the sleeve.

In this way, a space is created between the head of the ratchet wrench and the sleeve, and the user can use one or two fingers to act on the space to pull away from the sleeve 9. Matching faces 10, 13 are produced on the joint 10 of the sleeve 9, on which the user can apply a force in the direction of the pull-out. By this space, the ratchet wrench is pulled away from the sleeve 9 in a significant manner.

Figure 2 shows the components of the driven portion 8 depicted and described in the embodiment of Figure 1. It is also stated herein that the isolation surface 7 surrounding the driven portion 8 and the driven portion 8 appear on the same component. A ramp 11 also appears on this assembly.

Figure 3 shows an axial section through one of the sleeves. This sleeve (like all sleeves) contains a section with the recess 14 for the driven portion 8 also featuring a square cross section. In one of the walls, a recess is provided for the spring loaded ball in the driven portion 8. In contrast to the section having the recess 14, the sleeve contains a cross section with a hexagonal recess 15 which is used to drive a screw or nut. The outer circumference of this section is formed depending on the size of the recess 15 for the element.

For example, we can obtain from Figure 3 that the user pulls the sleeve away from the outside without a grip surface. This gripping surface is now placed on the joint 10 and the annulus 19, which are connected obliquely outwards and downwards. However, the slope 13 in Fig. 1 is preferred.

Note that in the embodiment of Figures 1 and 2, the isolation surface 7 surrounding the driven portion 8 and the driven portion 8 are formed on the same assembly such that the isolation surface and associated assembly are relative to the wrench head 2 It is idling and can be rotated.

Another possible way and depicted in Figure 4 is formed on the wrench head 2 around the isolation surface 17 of the driven portion 8 (which is also flat in the depicted example). Furthermore, in this case, the separating surface 17 can be characterized by a bevel 11 which results in the same configuration as in the case of the embodiment according to Fig. 1.

Figure 5 shows an assembly similar to one of the components in Figure 2. The disc member 16 is characterized by an isolation surface 27 surrounding the driven portion 8, which is completely convex in shape. This convex curvature extends up to the edge 18. Therefore, some features similar to the above embodiments are obtained. If we use the assembly depicted in Figure 5 in the wrench head 2 according to the embodiment of Figure 1, an axial spacing or transition zone will be created between the edge of the wrench head 2 and the heel of the driven portion 8. segment. The conical transition section 27 and the downwardly inclined annulus 19 or beveled surface 13 enable the user to manually grip the gripping surface in the same manner as the embodiment according to Fig. 1.

1. . . Grip lever

2. . . Wrench head

3. . . side

4. . . side

5. . . Actuating element

6. . . dish

7. . . Isolation surface

8. . . Slave part

9. . . Sleeve

10. . . Matching face/join

11. . . Bevel

12. . . edge

13. . . Matching face/join

14. . . Concave

15. . . Concave

16. . . Disc component

17. . . Isolation surface

18. . . edge

19. . . Torus

27. . . Isolation surface

Figure 1 shows a side view of the junction of a ratchet wrench;

Figure 2 shows a side view of an element containing a driven portion;

Figure 3 shows a section through a sleeve;

Figure 4 is a side elevational view showing the junction of a ratchet wrench in a second embodiment; and

Figure 5 shows an illustration of one of the further embodiments according to Figure 2.

1. . . Grip lever

2. . . Wrench head

3. . . side

4. . . side

5. . . Actuating element

6. . . dish

7. . . Isolation surface

8. . . Slave part

9. . . Sleeve

10. . . Matching surface

11. . . Bevel

12. . . edge

13. . . Matching surface

Claims (5)

A ratchet wrench having a gripping lever (1) disposed at one of the ends of the gripping lever (1), a wrench head (2) transverse to the gripping lever from the wrench head (2) (1) The longitudinal axis protrudes from one of the driven portions (8), which is surrounded by all the sides from one side (7, 17 and 27) and has a sleeve attached to the driven portion (8) ( 9) wherein a transition section between the edge (12) of the wrench head (2) and the heel of the driven portion (8) is tapered toward the direction of the driven portion (8) The junction (10) of the sleeve (9) associated with the ratchet wrench is at least partially radially outwardly and downwardly inclined at an angle of between 30 and 60 degrees. A ratchet wrench having a sleeve according to claim 1, wherein the transition section is at least partially convex. A ratchet wrench having a sleeve according to claim 1, wherein the transition section at least partially forms a slope (11). A ratchet wrench having a sleeve according to claim 1, wherein the joint (10) of the sleeve (9) is surrounded by a slope (13). A ratchet wrench having a sleeve according to claim 3, wherein the respective bevel lengths (11, 13) are between 1.0 mm with respect to the opposite widths SW4 to SW8 and 1.5 mm with respect to the opposite width SW13 and greater than SW13.