阅读说明：本技术 螺丝刀批头以及包括拧紧工具和这种批头的套件 (Screwdriver bit and kit comprising a tightening tool and such a bit ) 是由 J·斯图雷松 于 2020-04-23 设计创作，主要内容包括：本申请说明书涉及一种螺丝刀批头(1),其包括主体,所述主体具有第一端部(10)、相对的第二端部(20)以及中间部分(30),第一端部(10)包括适配为接合紧固件头部的第一接合结构(11),中间部分(30)连接所述第一端部和所述第二端部,其中,所述第二端部包括第二接合结构(21),所述第二接合结构(21)适配为接合工具的尖端,并且其中所述第二接合结构由在轴向方向A-A上延伸的至少一个凸出结构(21a；21b；21c)形成。本申请说明书还涉及一种包括这样的螺丝刀批头和拧紧工具的套件,所述拧紧工具包括用于将批头锁定在拧紧工具中的止付螺丝(110)。(The present description relates to a screwdriver bit (1) comprising a body having a first end (10), an opposite second end (20) and an intermediate portion (30), the first end (10) comprising a first engagement structure (11) adapted to engage a fastener head, the intermediate portion (30) connecting the first and second ends, wherein the second end comprises a second engagement structure (21), the second engagement structure (21) being adapted to engage a tip of a tool, and wherein the second engagement structure is formed by at least one protruding structure (21 a; 21 b; 21c) extending in an axial direction A-A. The present description also relates to a kit comprising such a screwdriver bit and a tightening tool comprising a setscrew (110) for locking the bit in the tightening tool.)

1. A screwdriver bit (1) comprises a main body with

A first end portion (10) comprising a first engagement structure (11), the first engagement structure (11) adapted to engage a fastener head,

an opposite second end portion (20), an

An intermediate portion (30) connecting the first end portion and the second end portion,

wherein the second end comprises a second engagement structure (21), the second engagement structure (21) being adapted to engage a tip of a tool, and wherein the second engagement structure is formed by at least one protruding structure (21 a; 21 b; 21c) extending in the axial direction A-A.

2. Screwdriver bit according to claim 1, wherein the at least one protruding structure at least partially surrounds a recess (22) adapted to receive the tip of a tool.

3. The screwdriver bit of claim 2, wherein the at least one protruding structure forms a hole adapted to receive a tip of a tool.

4. Screwdriver bit according to claim 1 or 2, wherein the second engagement structure comprises at least two protrusions (21a, 21b) extending in the axial direction and spaced from each other in the circumferential direction.

5. Screwdriver bit according to claim 4, wherein the at least two projections form a castellated projection structure extending in the axial direction, the structure comprising grooves (23a, 23b) spaced from each other in the circumferential direction.

6. The screwdriver bit of claim 5, wherein the castellated projections comprise grooves equally spaced from one another in a circumferential direction.

7. The screwdriver bit of any of the preceding claims, wherein the second engagement structure is adapted to engage a tool tip having a hexagonal cross-section.

8. The screwdriver bit of any of claims 2-6, wherein the second engagement structure is adapted to engage a tip of a tool of a type selected from a quincunx, a square, or a triangle.

9. Screwdriver bit according to any of the preceding claims, wherein the total length of the screwdriver bit is in the range of 18-50 mm.

10. The screwdriver bit of any of the preceding claims, wherein the second engagement structure is adapted to engage a tip of a screwdriver.

11. Kit (100) comprising a screwdriver bit (1) according to any one of the preceding claims and a tightening tool comprising a setscrew (110) for locking the bit in the tightening tool, the setscrew comprising a thread (111) and a rear surface (112), the thread (111) for engaging a corresponding thread (211a) in a through hole (211) at a front end (210) of the tightening tool for locking the bit, the rear surface (112) comprising engagement means (112a) adapted to engage a tool tip of a first type,

wherein the second engagement structure (21) of the screwdriver bit (1) adapted to engage a tip of a tool is adapted to engage the first type of tool tip.

12. The kit according to claim 11, wherein the rear surface of the set screw comprising engagement means adapted to engage a first type of tool tip is adapted to engage a first type of screwdriver tip, and wherein the second engagement structure of the screwdriver bit adapted to engage a tool tip is adapted to engage the first type of screwdriver tip.

13. The kit of claim 11 or 12, wherein the front end (210) of the power tool is a claw-type extension.

Technical Field

The present invention relates generally to bits for power tools used to tighten screws, and more particularly to screwdriver bits for such tools having structure for engaging the tip of the tool.

Background

Power tools for tightening are known to be used in various industries. In order to provide engagement between the tool and the element to be tightened, for example a screw, a so-called bit (i.e. a screwdriver bit) is often used. For example, interchangeable lot headers may be used.

These bits are subject to varying degrees of wear and must be replaced at intervals to provide proper engagement of the screws and to avoid possible damage to the screws when using bits that are too worn. Since this process can be time consuming and, depending on the application, since such replacement may need to be done often, perhaps after each tightening of a very critical fitting, this process can have a significant impact on the overall time of assembly in some industries. In view of the high demands on efficiency and time reduction of each station on the assembly line, this delay can be a major issue for overall assembly efficiency. Further, depending on the steps required to perform the replacement of the lot head, unnecessary complexity may be introduced in the assembly process.

To speed up and facilitate changing the bits, it is known in the art for the tool operator to, for example, shake or otherwise manipulate the tool in a more or less suitable manner to force the bits into position. However, such manipulation of complex and advanced tools often presents a high risk of damaging the tool and/or the batch head, in addition to being less effective in actually achieving the goal of correctly placing the batch head in the tool.

Accordingly, there is a need for improvements in the field of screwdriver bits.

Disclosure of Invention

It is therefore desirable to provide a bit for a power tool in which replacement and proper placement of the bit after such a change has been facilitated. In particular, it is desirable to provide a batch head that provides quick and convenient replacement while reducing the complexity of the work station. To better address one or more of these issues, a batch head and a kit as defined in the independent claims are provided. Preferred embodiments are defined in the dependent claims.

According to a first aspect of the present invention, there is provided a screwdriver bit comprising a body having a first end portion comprising a first engagement formation adapted to engage a fastener head (e.g. a screw head), an opposite second end portion connecting the first and second end portions, and an intermediate portion, wherein the second end portion comprises a second engagement formation adapted to engage a tip of a tool, and wherein the second engagement formation is formed by at least one protruding formation extending in an axial direction a-a.

According to a first aspect, the screwdriver bit provides an inventive solution to the above-mentioned problem by a design comprising an engagement structure, or upper surface coupling means, arranged at one end of the bit, which end may be described as a rear end or an upper end in use, and which end is thus generally accessible when the bit is arranged in the screwdriver. This is due to the fact that a common design in screwdrivers, such as electric or pneumatic screwdrivers, is a design comprising a so-called set screw (or stop screw) for fixing the bit in the tool. In such tools, a through hole is provided at the front end of the tool into which the bit can be "dropped" or placed, and a setscrew is then inserted into the hole and engages the wall of the through hole (e.g. by threading) to lock the bit in place, preventing axial movement of the bit relative to the tool as the setscrew engages the threading and the setscrew abuts the rear end of the screw. Further, such set screws typically include structure at the rear (or upper end) adapted to engage the tip of a screwdriver or similar tool, such that the set screw may be secured to the tool by rotation. Thus, the operator performing the replacement of the bits usually needs to have a suitable screwdriver nearby.

The bits according to the invention make use of the existing screwdriver skillfully, i.e. comprising at its second end a structure that can be adapted to engage the screwdriver. Thus, the operator can conveniently use the same screwdriver to position the bit by engaging the engagement formations, for example to push the bit into position and/or to rotate the bit to a desired rotational position, after which the setscrew is tightened again using the same screwdriver.

More specifically, the design of the second engagement structure of the batch head may, for example, be designed to correspond to the design of the engagement structure at the upper or rear end of the setscrew, so that the operator can more conveniently perform both operations with the same screwdriver.

The inventive design of the batch head according to the independent claim 1 thus skillfully solves the problem of spending too much time on changing the batch head, with a screwdriver that has been required for tightening the setscrew, and reduces the complexity of the changing operation itself, as well as of the entire work station.

Thus, according to one embodiment, the second engagement structure is adapted to engage the tip of a screwdriver.

The mentioned tool in which the bits of the invention may be arranged may be a tightening tool, e.g. a screwdriver, e.g. a power screwdriver such as a pneumatic or electric screwdriver, or possibly a battery-driven tool. More specifically, a screwdriver bit may be adapted for use with a powered screwdriver that includes a setscrew for securing the bit, one example of which includes a claw (crowfoot) tool, i.e., a tool that includes a claw-type extension.

The second engagement structure is formed by at least one protruding structure extending in an axial direction, more particularly from or relative to the rear portion. For example, the at least one projection structure may extend in an axial direction from a substantially planar rear surface of the rear portion. Such a surface may be a surface perpendicular to said axial direction. Generally, in the present description, the axial direction is understood to be along the direction of the screwdriver bit body, i.e. between the first end and the second end of the screwdriver bit, if no other description is given. Those skilled in the art will of course recognize that this configuration may equally be described as a reference surface dependent recess configuration, i.e. a recess for engaging the tool tip.

According to one embodiment, the at least one protruding structure at least partially surrounds a recess adapted to receive the tool tip. For example, a recess defined by a surrounding raised formation may be provided in the upper surface of the bit, forming the engagement formation, and the tool tip may be provided with a fitting projection so that they can be brought into engagement, so that torque can be transmitted. According to one embodiment, the at least one protruding structure forms a hole adapted to receive a tool tip. In one embodiment, such a hole may have a hexagonal cross-section. In other embodiments, such a hole may have a double hexagonal cross-section. However, any other shape is conceivable within the scope of the invention.

According to one embodiment, the second engagement structure is formed by (i.e. comprises) at least two projections extending in the axial direction and being spaced from each other in the circumferential direction. For example, two or more tongues or pins or the like may be arranged in any suitable pattern at the second end of the batch head to extend in the axial direction. In some embodiments, this structure may be achieved by a slotted structure. For example, the second engagement formation may comprise a hollow axially extending formation, i.e. a raised formation surrounding a recess through which a radial slot may be introduced, thereby forming two or more sections. Such a design may be advantageous in terms of manufacturability and may require less material for the lot header.

According to one embodiment, the at least two projections form castellated projection structures extending in the axial direction, the structures comprising grooves spaced from each other in the circumferential direction. Castellation in the context of the present specification is to be understood as a structure comprising a substantially circular (i.e. cylindrical) axial projection structure, i.e. may be referred to as a base structure, through which one or more radial grooves or recesses are introduced, forming at least two axial projections. Thus, in this sense, castellations refer to serrated revetment similar to that of a castellation, i.e. a middle century castellation. According to one embodiment, the castellated projection structures comprise grooves that are equally spaced from each other in the circumferential direction.

According to one embodiment, the second engagement structure is adapted to engage a tool tip having a hexagonal cross-section. For example, the second engagement formation may be a hole having a hexagonal cross-section or a slotted or castellated structure adapted to engage a hexagonal tip. The advantage of this design is that the hex driver, also known as an internal hex driver, is a common type of driver that is readily available to, for example, workers on an assembly line. Further, this cross-section is also a common choice for the engagement structure at the rear end of the set screw described above, and therefore also the shape of the screwdriver used to tighten the screw. In one embodiment, the at least one protrusion has a double hexagonal shape, i.e. a double hexagonal cross-section.

According to one embodiment, the second engagement structure is adapted to engage a tip of a tool of a type selected from a quincunx, a square, or a triangle. In other embodiments, the second engagement structure may be adapted to engage the tip of any other common type of tool, such as a slot, a cross (also known as a phillips type), or a square (also known as a robertson type). In one embodiment, the middle portion of the batch head comprises a hexagonal cross-section.

According to one embodiment, the total length of the screwdriver bits is in the range 10-50mm, in some embodiments in the range 15-25 mm. According to one embodiment the length of the second engagement formation headpiece is in the range 2-5 mm.

According to a second aspect of the present invention there is provided a kit comprising a screwdriver bit according to any of the above embodiments and a tightening tool comprising a set screw for locking the bit in the tightening tool, the set screw comprising a thread for engaging a corresponding thread in a through hole at a front end of the tightening tool to lock the bit and a rear surface comprising engagement means adapted to engage a tool tip of a first type, wherein the second engagement formation of the screwdriver bit adapted to engage the tip of the tool is adapted to engage the tool tip of the first type. Thus, in such a kit, the engagement means of the rear surface of the setscrew and the engagement means on the second end of the bit may be matched, i.e. adapted to engage the same size and shape of tool tip, the advantages of which have been explained above. The rear surface is understood to be the surface at the end opposite to the end of the set screw facing (possibly abutting) the screwdriver bit.

According to an embodiment of the second aspect, the rear surface of the locking screw comprising engagement means adapted to engage the tip of the tool of the first type is adapted to engage the tip of the screwdriver of the first type, and wherein the second engagement structure of the screwdriver bit adapted to engage the tip of the tool is adapted to engage the tip of the screwdriver of the first type. As mentioned above, a hexagonal or socket head driver is one possible type of driver.

According to another embodiment of the second aspect of the invention, the front of the tool is a claw-type extension.

According to a third aspect of the present invention there is provided a kit comprising a screwdriver bit according to any of the above embodiments and a jaw-type extension for a power tool, the jaw-type extension of the power tool comprising a set screw for locking the bit in the jaw-type extension, the set screw comprising a thread for engaging a corresponding thread in a through-hole at a front end of the jaw to lock the bit and a rear surface comprising engagement means adapted to engage a tool tip of a first type, wherein the second engagement formation of the screwdriver bit adapted to engage the tip of the tool is adapted to engage the tool tip of the first type.

Objects, advantages and features of the various kits that are contemplated within the scope of the second and third aspects of the invention will be readily understood by reference to the foregoing discussion of the first aspect of the invention.

Further objects, features and advantages of the present invention will become apparent when studying the following detailed disclosure, the drawings and the appended claims. Those skilled in the art realize that different features of the present invention can be combined to create embodiments other than those described in the following.

Drawings

The present invention will be described in the following illustrative and non-limiting detailed description of exemplary embodiments with reference to the attached drawings, wherein

Fig. 1 is a perspective view of an exemplary screwdriver bit according to one embodiment.

Fig. 2 is a cross-sectional view of an exemplary screwdriver bit according to one embodiment.

Fig. 3 is a perspective cross-sectional view of an exemplary screwdriver bit, shown with a setscrew disposed at a front of an exemplary power tool, according to one embodiment.

All the figures are schematic, not necessarily to scale, and generally show only parts which are necessary for elucidating the invention, wherein other parts may be omitted or only mentioned.

Detailed Description

An exemplary screwdriver bit 1 is shown in fig. 1, the bit comprising a body having a first end 10, an opposite second end 20, and an intermediate portion 30, the first end 10 comprising a first engagement structure 11 adapted to engage a fastener head (e.g. a screw head), which in the illustrated embodiment has a square cross-section, the intermediate portion 30 connecting the first end 10 and the second end 20. Thus, the first end 10 is the part of the bit that is remote from the tool when arranged in the tool (i.e. the distal part), whereas the second part 20 is the part of the bit that faces the tool when arranged in the tool (i.e. the proximal part).

The second end 20 comprises a second engagement structure 21, which second engagement structure 21 is adapted to engage a tip of a tool, in the illustrated embodiment in particular a screwdriver. As can be seen in fig. 1, the second engagement structure comprises or is formed by three projection structures 21a-c, which are spaced apart from each other in the circumferential direction and extend in an axial direction a-a defined between the first end portion 10 and the second end portion 20. These protruding structures 21a-c may be described as at least partially surrounding a recess 22 that may receive the tip of a screwdriver.

More specifically, in the illustrated embodiment, the three projections 21a-c form castellated projection structures 21a-c that can be described as extending in the axial direction A-A and include slots 23a-c that are equally spaced from one another in the circumferential direction of the batch head 1.

The shape of the projections 21a-c is such that a screwdriver tip having a hexagonal cross-section (i.e. a hexagonal or socket head wrench) can be exchanged by the projections. Thus, as can be seen in FIG. 2, the cross-section of each of the projections 21a-c includes an outer arcuate portion 24 (i.e. corresponding to or along the circumference of the second end 20 of the batch head 1, two inclined portions 25a-b and a straight inner portion 26. thus, every other edge of the hexagonal shaped screwdriver tip may abut and engage the straight portion 26 (since the screwdriver is used to properly position the batch head).

In the illustrated exemplary embodiment, the total length of the screwdriver bit, from the first end 10 to the second end 20, is about 20mm, while the axial length of the protruding structure 21a is about 2 mm.

In the case of a protruding structure 21a with a continuous non-slotted design, a hole may instead be arranged at the upper or rear end of the bit, said hole being adapted to receive the tip of a tool (in this case a hexagonal or socket head screwdriver).

In fig. 3, a screwdriver bit 1 is shown arranged in the front 200 of a tightening tool comprising a setscrew 110 (or locking screw) for locking the bit 1 to the tool.

In the illustrated embodiment, the bit and thus the setscrew is arranged in a so-called claw-type configuration (crowfoot) 200, i.e. the front part 200 of the tool is a claw-type extension 200.

The claw-like formation 200 comprises a through hole 211 at its front end 210, which through hole 211 has a thread 211a for engaging the thread 111 on the set screw 110, thereby locking the set screw 110 and thus the screwdriver bit 1 in use below the set screw 110 in the tool. In the illustrated embodiment, set screw 110 includes an engagement means 112a in the form of a recess or hole 112a in its rear surface 112, which recess or hole 112a has a hexagonal cross-section and is therefore adapted to engage a socket head or hexagonal screwdriver to enable set screw 110 to be tightened.

The screwdriver bit in fig. 3 comprises the same second engagement structures 21a-c as the embodiment illustrated in fig. 1 and 2, i.e. having three protruding structures 21a-c spaced from each other in the circumferential direction and extending in the axial direction, thus being adapted to engage a hexagonal or hexagonal socket head screwdriver tip. More specifically, the engagement structure is adapted to engage a hexagonal or socket head type screwdriver having the same dimensions as the hexagonal bore 112a at the upper or rear end 112 of the setscrew 110.

During operation of the tool, since the operator needs to replace the bit, he or she can unscrew set screw 110 from through hole 211 in claw-type extension 200 with a hex driver, remove the used bit 1 (if necessary, by engagement of castellations 21a-c at the rear end 20 of bit 1), insert a new bit 1 into the hole, and use the same hex driver to engage the castellations 21a-c, thereby conveniently positioning the bit 1 in the correct position (including rotation of bit 1 and axial translation on the bit). Finally, set screw 110 may be tightened, again using the same hex driver. The operator can thus complete the entire operation quickly and efficiently with only one tool, which is a standard screwdriver, and without any undesirably strong manipulation of the tool, which may cause damage to the bits and/or the tool.

While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the present invention is not limited to the disclosed embodiments. Those skilled in the art will appreciate that many modifications, variations and changes may be made within the scope defined in the appended claims. Further, variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope of the claims.