TWI840190B - Magnetic driving device - Google Patents

Abstract

A magnetic driving device is provided, including: a sleeving rod, including a connection hole and a receiving hole in communication with the connection hole which are disposed at one end of the sleeving rod, the connection hole being configured to receive a workpiece, a first groove being disposed on a hole wall of the receiving hole; a movable member, received in the receiving hole, including a magnetic end portion and a second groove; a retainer, sleeved on the movable member, extending radially wthin the first groove and the second groove, axially movable in within the first groove; and an elastic member, received in the receiving hole and located between the sleeving rod and the movable member.

Description

Magnetic drive device

The present invention relates to a driving device, in particular to a driving device with magnetism.

Screwdrivers are often used to screw or disassemble items. Sometimes the hand strength alone is not enough to drive the screw to rotate, or when there are too many screws to be rotated, it is necessary to use a power rotating tool with a tool adapter and a screwdriver head to reduce the burden on the construction worker and speed up the overall construction speed.

When working with screws or fasteners of different sizes or types, the tool adapter must be replaced with the corresponding screwdriver head or working head. However, many known tool adapters do not provide a structural mechanism that can quickly and stably assemble workpieces, and the construction is not smooth and time-consuming. In addition, their structure is usually more complicated and difficult to assemble.

Therefore, it is necessary to provide a novel and advanced magnetic drive device to solve the above problems.

The main purpose of the present invention is to provide a magnetic drive device which has a simple structure, is easy to assemble, and can quickly and stably assemble workpieces.

To achieve the above-mentioned purpose, the present invention provides a magnetic driving device, comprising: a sleeve rod, one end of which is provided with a sleeve hole and a receiving hole connected to the sleeve hole, the sleeve hole is used to accommodate a workpiece, and the hole wall of the receiving hole is provided with a first groove; a movable member, which is accommodated in the receiving hole, including a magnetic end and a second groove; a stopper, which is sleeved on the movable member, radially extends into the first groove and the second groove, and can move in an axial direction in the first groove; and an elastic member, which is accommodated in the receiving hole and is located between the sleeve rod and the movable member.

1: Magnetic drive device

10: Rod set

11: Hole piercing

12: Volume

121: Small path section

122: Main diameter section

123: Gradient surface

13: First groove

131: First shoulder surface

20:Active parts

21: Magnetic end

211: Embedded groove

212: Magnetic parts

22: Second groove

221: Second shoulder surface

23: Tapered end

24: End plane

30: Stopper

40: Elastic parts

A: Axial

G1,G2: Radial gap

Figure 1 is a three-dimensional diagram of a preferred embodiment of the present invention.

Figure 2 is a disassembled diagram of a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view of a preferred embodiment of the present invention.

Figure 4 is a partial enlarged view of Figure 3.

Figure 5 is another cross-sectional view of a preferred embodiment of the present invention.

Figure 6 is a partial enlarged view of Figure 5.

Figure 7 is a schematic diagram of a part of the movable parts of a preferred embodiment of the present invention.

The following examples are only used to illustrate possible implementations of the present invention, but are not intended to limit the scope of protection of the present invention, so it should be stated in advance.

Please refer to Figures 1 to 7, which show a preferred embodiment of the present invention. The magnetic drive device 1 of the present invention includes a set of rods 10, a movable part 20, a baffle 30 and an elastic part 40.

The sleeve rod 10 is provided with a sleeve hole 11 and a receiving hole 12 connected to the sleeve hole 11 at one end. The sleeve hole 11 is used to accommodate a workpiece (such as a fastener, a screwdriver head, a connecting rod or the like), and the hole wall of the receiving hole 12 is provided with a first groove 13. The movable member 20 is accommodated in the receiving hole 12, and the movable member 20 includes a magnetic end 21 and a second groove 22. The baffle 30 is sleeved on the movable member 20 and radially extends into the first groove 13 and the second groove 22. The baffle 30 can move in an axial direction A in the first groove 13. The elastic member 40 is accommodated in the receiving hole 12 and is located between the sleeve rod 10 and the movable member 20. Thereby, its structure is simple, easy to assemble, and the workpiece can be assembled quickly and stably.

The baffle 30 is a wire. Along the axial direction A, the width of the first groove 13 is not less than 1.5 times the wire diameter of the baffle 30, and the width of the second groove 22 is not less than 3.0 times the wire diameter of the baffle 30. In this way, the movable part 20 can be provided with a larger movable stroke under the shorter sleeve rod 10. Preferably, the radial cross-section of the wire is circular, and the radial dimension of the wire extending into the first groove 13 and the second groove 22 is not less than 0.3 times the wire diameter, respectively. The baffle 30 and the groove bottom surfaces of the first groove 13 and the second groove 22 have a radial gap G1, G2 respectively, which can reduce the friction and damage of each component.

In detail, the first groove 13 includes two first shoulder surfaces 131 facing each other axially, and the second groove 22 includes two second shoulder surfaces 221 facing each other axially. The stopper 30 can be clamped between one of the first shoulder surfaces 131 and one of the second shoulder surfaces 221. The receiving hole 12 includes a small diameter section 121 and a large diameter section 122 connected between the sleeve hole 11 and the small diameter section 121. The movable member 20 is inserted in the large diameter section 122, and the elastic member 40 is inserted in the small diameter section 121. The large diameter section 122 is provided with the first groove 13. The receiving hole 12 also includes a tapered surface 123 facing the movable member 20, and the tapered surface 123 is a conical surface. When the stopper 30 is clamped between the first shoulder surface 131 and the second shoulder surface 221, the movable part 20 is axially spaced from the tapered surface 123, which can avoid damage to the movable part 20.

Preferably, the movable part 20 further includes a tapered end 23 tapering away from the magnetic end 21, the tapered end 23 is cone-shaped, and the second groove 22 is located between the magnetic end 21 and the tapered end 23. During assembly, the tapered end 23 can push the blocker 30 to the first groove 13 and radially fit in the first groove 13. The tapered end 23 is also conducive to forcing the blocker 30 to pass through the blocker 30 smoothly, so that the blocker 30 is embedded in the second groove 22.

In this embodiment, the movable member 20 further includes a terminal plane 24 opposite to the magnetic end 21, and the elastic member 40 abuts against the terminal plane 24. The end of the movable member 20 including the terminal plane 24 is a solid structure with high structural strength, and no deformation or damage occurs when the movable member 20 is pressed and passes through the stopper 30. The magnetic end 21 includes a groove 211 and a magnetic member 212 embedded in the groove 211, which is easy to assemble and disassemble. When the stopper 30 is clamped between the first shoulder surface 131 and the second shoulder surface 221, at least three fifths of the axial length of the magnetic member 212 is in the receiving hole 12, which can increase the magnetic attraction stability of the workpiece. Preferably, the elastic member 40 can radially abut against the peripheral wall of the small diameter section 121, and the configuration is stable and does not deviate.

10: Rod set

20:Active parts

211: Embedded groove

212: Magnetic parts

30: Stopper

40: Elastic parts

A: Axial

Claims (7)

A magnetic driving device includes: a sleeve rod, one end of which is provided with a sleeve hole and a receiving hole connected to the sleeve hole, the sleeve hole is used to accommodate a workpiece, and the hole wall of the receiving hole is provided with a first groove; a movable member, which is accommodated in the receiving hole, includes a magnetic end and a second groove; a stopper, which is sleeved on the movable member, radially extends into the first groove and the second groove, and can move in an axial direction in the first groove; and an elastic member, which is accommodated in the receiving hole and is located between the sleeve rod and the movable member; wherein , the baffle is a wire, and along the axial direction, the width of the first groove is not less than 1.5 times the wire diameter of the baffle; wherein the first groove includes two axially facing first shoulder surfaces, and the second groove includes two axially facing second shoulder surfaces, and the baffle can be clamped between one of the first shoulder surfaces and one of the second shoulder surfaces; wherein the receiving hole includes a tapered surface facing the movable part, and when the baffle is clamped between one of the first shoulder surfaces and one of the second shoulder surfaces, the movable part and the tapered surface are axially spaced. A magnetic drive device as described in claim 1, wherein the width of the second groove is not less than 3.0 times the wire diameter of the baffle. A magnetic drive device as described in claim 1, wherein the movable member further includes a tapered end portion tapering away from the magnetic end portion, and the second groove is located between the magnetic end portion and the tapered end portion. As described in claim 1, the magnetic drive device, wherein the receiving hole includes a small diameter section and a large diameter section connected between the sleeve hole and the small diameter section, the movable member is inserted in the large diameter section, the elastic member is inserted in the small diameter section, and the large diameter section is provided with the first groove. A magnetic drive device as described in claim 4, wherein the elastic member can radially abut against the peripheral wall of the small diameter segment. A magnetic drive device as described in claim 1, wherein there is a radial gap between the baffle and the bottom surface of the first groove and the second groove respectively. A magnetic drive device as described in claim 1, wherein the radial cross-section of the wire is circular, the radial extension of the wire into the first groove and the second groove is not less than 0.3 times the wire diameter of the wire; the width of the second groove is not less than 3.0 times the wire diameter of the baffle; the movable part further includes an end plane opposite to the magnetic end, and the elastic part abuts the end plane; the magnetic end includes an embedding groove and a magnetic part embedded in the embedding groove; the movable part further includes a tapered end that tapers away from the magnetic end, and the tapered end The contracted end portion is conical, and the second groove is located between the magnetic end portion and the tapered end portion; the receiving hole includes a small diameter section and a large diameter section connected between the sleeve hole and the small diameter section, the movable member is inserted in the large diameter section, the elastic member is inserted in the small diameter section, and the large diameter section is provided with the first groove; the elastic member can radially abut against the peripheral wall of the small diameter section; the tapered surface is a conical surface, and at least three fifths of the axial length of the magnetic member is in the receiving hole; a radial gap is respectively provided between the blocking member and the bottom surfaces of the first groove and the second groove.

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