Multi-functional Insulated Screwdriver

Abstract

The present invention discloses a multifunctional insulated screwdriver. The slewing bearing includes a slewing part and a supporting part. The slewing part is movably installed inside the supporting part. A limiting boss is provided on the slewing part. The inner shaft tube is fixedly installed at the limiting boss on the slewing part. After the magnet is placed inside the inner shaft tube, it is fixed by an end cap. The inner shaft tube insulation sheath is sleeved outside the end cap and the inner shaft tube. The outer shaft tube is fixedly installed at the lower part of the supporting part. A limiting jack is opened at the central position of the slewing part, and a through hole coaxial with the limiting jack is opened on the outer shaft tube. The outer shaft tube insulation sheath is sleeved outside the slewing bearing and the outer shaft tube. Paired concave platforms are respectively arranged on the outer sides of the inner shaft tube and the supporting part of the slewing bearing. The advantages of the present invention are: it can effectively insulate and isolate the working part, realize live working, improve the power supply reliability of the distribution line, and effectively expand the applicable range of this multifunctional insulated screwdriver.

Description

Technical Field

[0001] The present invention relates to the technical field of hardware tools, and more specifically to the technical field of screwdrivers. Background Art

[0002] A screwdriver is a commonly used tool for screwing screws into place. Its head is usually a thin wedge-shaped head for inserting into the slot or notch of the screw head to screw the screw. An insulated screwdriver is used in live or potentially live situations. To achieve good insulation, the common insulated screwdriver usually covers the part of the screwdriver except the tip of the bit with an insulating layer. However, this structure of insulated screwdriver has the following three deficiencies: First, when an operator uses an insulated screwdriver to screw a screw, the tip of the bit and the screw head being screwed are always exposed, and these parts may be accidentally touched, posing an electric shock risk. Especially when operating in a small working area, to prevent electric shock or phase-to-phase short circuit, power must be cut off, reducing the power supply reliability; Second, when an operator uses an insulated screwdriver to screw a screw, it is not easy to master the perpendicularity of the screwdriver, and the screwdriver cannot always be coaxial with the screw being screwed, resulting in the tip of the bit of the screwdriver being easily disengaged from the slot or notch of the screw head during screwing, reducing the screwing efficiency; Third, the bit of the insulated screwdriver cannot be disassembled and replaced, and a single screwdriver can only be suitable for specific types of screws. Summary of the Invention

[0003] The purpose of the present invention is to solve the above deficiencies and provide a multifunctional insulated screwdriver with good insulation effect, which can insulate and isolate the working parts, enable live operation, improve the power supply reliability of the distribution line, improve the working efficiency, and at the same time has the function of replacing the bit.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0005] Multifunctional insulated screwdriver, which includes an end cap, an inner shaft tube, a magnet, an inner shaft tube insulating sheath, a slewing bearing, an outer shaft tube, an outer shaft tube insulating sheath, a middle shaft tube, a spring, an elastic insulating sleeve, an insulating cover and a bit. The slewing bearing includes a slewing part and a supporting part. The slewing part is movably installed inside the supporting part, and a limiting boss is arranged on the slewing part. The inner shaft tube is fixedly installed at the limiting boss on the slewing part. The magnet is placed in the inner shaft tube and fixed by the end cap. The inner shaft tube insulating sheath is sleeved outside the end cap and the inner shaft tube. The outer shaft tube is fixedly installed at the lower part of the supporting part. A limiting jack is opened at the central position of the slewing part, and a through hole coaxial with the limiting jack is opened on the outer shaft tube. The outer shaft tube insulating sheath is sleeved outside the slewing bearing and the outer shaft tube. Paired concave platforms are respectively arranged on the outer sides of the inner shaft tube and the supporting part of the slewing bearing. The middle shaft tube passes through the through hole. A limiting part is arranged at the upper end of the middle shaft tube located inside the outer shaft tube. The insulating cover is fixedly installed at the lower end of the middle shaft tube. The spring and the elastic insulating sleeve are respectively sleeved on the middle shaft tube and are both located between the outer shaft tube and the insulating cover. The spring is located inside the elastic insulating sleeve. A through hole communicating with the middle shaft tube is opened at the upper end of the insulating cover. The lower end of the insulating cover is open and conical. The bit passes through the insulating cover, the middle shaft tube and the outer shaft tube, is inserted into the limiting jack at the center of the slewing part through its upper end, and is adsorbed by the magnet. The slewing bearing further includes balls and a cage. The slewing part is an inner ring, and the supporting part is an outer ring. The outer ring is located outside the inner ring. Annular grooves are respectively opened on the inner side wall of the outer ring and the outer side wall of the inner ring. The balls are located between the outer ring and the inner ring and are movably clamped in the annular grooves of the outer ring and the inner ring. The cage is located between the outer ring and the inner ring. Positioning sleeves evenly distributed in the circumferential direction are arranged on the cage. The balls are respectively movably clamped in the positioning sleeves of the cage. It further includes a first countersunk head screw. A first countersunk head hole is opened on the inner ring. A first screw hole is opened on the inner shaft tube. The bottom of the inner shaft tube contacts the upper part of the inner ring. The first countersunk head screw passes through the first countersunk head hole on the inner ring and is screwed into the first screw hole on the inner shaft tube. A first internal thread is arranged on the inner side wall of the inner shaft tube. A first external thread is arranged on the end cap. The magnet is placed in the inner shaft tube, and the bottom of the magnet contacts the upper part of the inner ring. The end cap is screwed onto the first internal thread of the inner shaft tube through its first external thread, and the end cap abuts against the magnet. It further includes a second countersunk head screw. A second countersunk head hole is opened on the outer ring. A second screw hole is opened on the outer shaft tube. The upper part of the outer shaft tube contacts the bottom of the outer ring. The second countersunk head screw passes through the second countersunk head hole on the outer ring and is screwed into the second screw hole on the outer shaft tube.

[0006] The insulating cover is composed of upper and lower parts, and the upper and lower parts of the insulating cover are connected by threads.

[0007] The central axis tube is T-shaped, and the limiting part of the central axis tube is the upper edge of the T-shaped central axis tube.

[0008] The lower end of the bit is in a shape of straight slot, cross, multi-point star, square, triangle, hexagon, Y or U.

[0009] The bit is coated with a zirconia insulating coating except for the lower end part.

[0010] The insulating cover is made of transparent polycarbonate material.

[0011] The beneficial effects that can be achieved by the present invention adopting the above technical solutions are as follows:

[0012] 1. When using and installing or removing screws with this multi-functional insulating screwdriver, the operator holds the insulating sheath of the inner shaft tube, places the lower end opening of the insulating cover outside the screw head to be screwed, then presses downwards, so that the end cap, inner shaft tube, magnet, slewing bearing, outer shaft tube and bit move downwards against the elastic force of the spring and the elastic insulating sleeve, and the lower end part of the bit is clamped in the slot or notch of the screw head to be screwed, and the screw is screwed. Since the head of the bit only extends out of the insulating cover when pressed downwards, and when screwing the screw, the insulating cover can cover the screw head inside it, which can effectively insulate and isolate the working part, realize live working, and improve the power supply reliability of the distribution line.

[0013] 2. All the parts that can be touched on the outside of this multi-functional insulating screwdriver are made of insulating materials, so live operation can be realized, effectively avoiding potential safety hazards such as electric shock and phase-to-phase short circuit.

[0014] 3. When a large torque is required to remove a nut with this multi-functional insulating screwdriver, the operator puts a socket on the hexagonal bit, holds one hand with an insulating open-end wrench on the concave platform outside the inner shaft tube to screw the slewing part and the bit, and holds the other hand with another insulating open-end wrench on the concave platform outside the outer shaft tube to support and position the outer shaft tube and the insulating cover, so that the insulating cover covers the nut inside it, thus significantly improving the stability during operation, keeping the bit always on the same axis as the nut to be screwed, and further improving the screwing efficiency of the nut.

[0015] 4. The bit is adsorbed on the magnet at its upper end, so different types of bits can be replaced according to needs, effectively expanding the applicable range of this multi-functional insulating screwdriver.

[0016] 5. The insulating cover is set to be composed of an upper part and a lower part, and the lower part of the insulating cover with different openings is replaced according to the outer diameter size of different screws or nuts. Description of the Drawings

[0017] Figure 1Schematic structural diagram of the present invention;

[0018] Figure 2 is Figure 1 Partial enlarged schematic diagram at position A in

[0019] Figure 3 is Figure 1 Partial enlarged schematic diagram at position B in

[0020] Figure 4 is Figure 1 Partial enlarged schematic diagram at position C in

[0021] Figure 5 is Figure 1 D - D sectional view of Detailed implementation manner

[0022] As shown by Figure 1 , the multifunctional insulated screwdriver includes a magnet 1, a slewing bearing, an outer shaft tube 2, a middle shaft tube 3, a spring 4, an insulating cover 5, a bit 6, an inner shaft tube 18, an end cap 19, a first countersunk head screw 17, a second countersunk head screw 24, an outer shaft tube insulating sheath 27, and an inner shaft tube insulating sheath 34. The end cap 19, the outer shaft tube 2, the middle shaft tube 3, the insulating cover 5, and the elastic insulating sleeve 28 are made of insulating materials. The slewing bearing includes a slewing part and a supporting part. The slewing part is movably installed inside the supporting part. The specific structure of the slewing bearing is as follows: As shown by Figure 2 and Figure 5As shown, the slewing bearing further includes balls 10 and a cage 11. The slewing part is the inner ring 12, and the supporting part is the outer ring 14. The outer ring 14 is located outside the inner ring 12. Annular grooves 15 are respectively formed on the inner side wall of the outer ring 14 and the outer side wall of the inner ring 12. The balls 10 are located between the outer ring 14 and the inner ring 12 and are movably clamped in the annular grooves 15 of the outer ring 14 and the inner ring 12. The cage 11 is located between the outer ring 14 and the inner ring 12. Positioning sleeves 16 evenly distributed in the circumferential direction are arranged on the cage 11, and the balls 10 are respectively movably clamped in the positioning sleeves 16 of the cage 11. A limiting boss 9 is arranged on the slewing part of the slewing bearing. The inner shaft tube 18 is fixedly installed at the limiting boss 9 on the slewing part. After the magnet 1 is placed in the inner shaft tube 18, it is fixed by an end cap 19. The specific structure of the inner shaft tube 18, the specific connection relationship between the inner shaft tube 18 and the slewing part, and the positional relationship between the magnet 1 and the inner shaft tube 18 and the end cap 19 are as follows: A first countersunk hole 20 is formed in the inner ring 12, a first threaded hole 21 is formed in the inner shaft tube 18. The bottom of the inner shaft tube 18 contacts the upper part of the inner ring 12. The first countersunk screw 17 passes through the first countersunk hole 20 of the inner ring 12 and is screwed into the first threaded hole 21 of the inner shaft tube 18. A first internal thread 22 is arranged on the inner side wall of the inner shaft tube 18, and a first external thread 23 is arranged on the end cap 19. The magnet 1 is placed in the inner shaft tube 18, and the bottom of the magnet 1 contacts the limiting boss 9 of the inner ring 12. The end cap 19 is screwed onto the first internal thread 22 of the inner shaft tube 18 through its first external thread 23, and the end cap 19 abuts against the magnet 1. The outer shaft tube 2 is fixedly installed at the lower part of the supporting part. The specific connection relationship between the outer shaft tube 2 and the supporting part is as follows: A second countersunk hole 25 is formed in the outer ring 14, a second threaded hole 26 is formed in the outer shaft tube 2. The upper part of the outer shaft tube 2 contacts the bottom of the outer ring 14. The second countersunk screw 24 passes through the second countersunk hole 25 of the outer ring 14 and is screwed into the second threaded hole 26 of the outer shaft tube 2. The outer shaft tube insulating sheath 27 is tightly sleeved outside the outer ring 14, the balls 10, the cage 11 and the outer shaft tube 2. The inner shaft tube insulating sheath 34 is tightly sleeved outside the inner shaft tube 18 and the end cap 19. From Figure 3 As shown, a limiting jack 7 is formed at the central position of the slewing part. A through hole 8 coaxial with the limiting jack 7 is formed in the outer shaft tube 2. The middle shaft tube 3 passes through the through hole 8. A limiting part is arranged on the middle shaft tube 3 located inside the outer shaft tube 2. The middle shaft tube 3 is T-shaped, and the limiting part of the middle shaft tube 3 is the upper edge 33 of the T-shaped middle shaft tube 3. The insulating cover 5 is fixedly installed at the lower part of the middle shaft tube 3 and is fixedly installed in the following manner: From Figure 4As shown, an annular groove 29 is formed on the inner sidewall of the lower part of the central shaft tube 3. A second internal thread 30 is provided on the inner wall of the annular groove 29 of the central shaft tube 3. A connecting sleeve 31 is provided on the upper part of the insulating cover 5. A second external thread 32 is provided on the outer sidewall of the connecting sleeve 31. The connecting sleeve 31 is located in the annular groove 29 of the central shaft tube 3 and is screwed onto the second internal thread 30 through the second external thread 32. The lower part of the insulating cover 5 is conical. The insulating cover 5 is made of transparent polycarbonate material. The spring 4 is installed between the outer shaft tube 2 and the insulating cover 5. The elastic insulating sleeve 28 is a corrugated pipe and is installed between the outer shaft tube 2 and the insulating cover 5. The spring 4 is sleeved on the outside of the central shaft tube 3, and the insulating elastic sleeve 28 is sleeved on the outside of the spring 4. The bit 6 passes through the insulating cover 5, the central shaft tube 3 and the outer shaft tube 2 and is clamped in the limit jack 7 through its upper end. The cross-section of the limit jack 7 is a regular hexagon, and the upper end of the bit 6 is a regular hexagon corresponding to the limit jack 7. The upper end of the bit 6 is adsorbed on the magnet 1, and the lower end of the bit 6 is in a shape of one type among flat, cross, multi-point, square, triangular, hexagonal, Y-shaped or U-shaped. The rest of the bit 6 except the lower end part is coated with a zirconia insulating coating. In order to facilitate the screwing of nuts with large torques, a pair of concave platforms 35 are respectively provided on the outer sides of the inner shaft tube and the supporting part of the slewing bearing. During use, the screwing can be carried out with the help of the force of an insulating fixed-end wrench, which makes the work easier and more convenient. In order to meet the need of screwing screws or nuts of different sizes, the insulating cover 5 is arranged to be composed of an upper part and a lower part, and the upper and lower parts are connected by a thread 13.

Claims

1. Multifunctional insulated screwdriver, Characterized in that: It includes an end cap, an inner shaft tube, a magnet, an inner shaft tube insulating sheath, a slewing bearing, an outer shaft tube, an outer shaft tube insulating sheath, a middle shaft tube, a spring, an elastic insulating sleeve, an insulating cover and a bit. The slewing bearing includes a slewing part and a supporting part. The slewing part is movably installed inside the supporting part. A limiting boss is provided on the slewing part. The inner shaft tube is fixedly installed at the limiting boss on the slewing part. The magnet is placed in the inner shaft tube and fixed by the end cap. The inner shaft tube insulating sheath is sleeved outside the end cap and the inner shaft tube. The outer shaft tube is fixedly installed at the lower part of the supporting part. A limiting jack is provided at the center position of the slewing part. A through hole coaxial with the limiting jack is provided on the outer shaft tube. The outer shaft tube insulating sheath is sleeved outside the slewing bearing and the outer shaft tube. Paired concave platforms are respectively provided on the outer sides of the inner shaft tube and the supporting part of the slewing bearing. The middle shaft tube is inserted through the through hole. A limiting part is provided at the upper end of the middle shaft tube located inside the outer shaft tube. The insulating cover is fixedly installed at the lower end of the middle shaft tube. The spring and the elastic insulating sleeve are respectively sleeved on the middle shaft tube and are both located between the outer shaft tube and the insulating cover. The spring is located inside the elastic insulating sleeve. A through hole communicating with the middle shaft tube is provided at the upper end of the insulating cover. The lower end of the insulating cover is open and conical. The bit is inserted through the insulating cover, the middle shaft tube and the outer shaft tube, and is inserted into the limiting jack at the center of the slewing part at its upper end and adsorbed to the magnet. The slewing bearing further includes balls and a cage. The slewing part is an inner ring, and the supporting part is an outer ring. The outer ring is located outside the inner ring. Annular grooves are respectively provided on the inner side wall of the outer ring and the outer side wall of the inner ring. The balls are located between the outer ring and the inner ring and are movably clamped in the annular grooves of the outer ring and the inner ring. The cage is located between the outer ring and the inner ring. Positioning sleeves evenly distributed in the circumferential direction are provided on the cage. The balls are respectively movably clamped in the positioning sleeves of the cage. It further includes a first countersunk head screw. A first countersunk head hole is provided on the inner ring. A first screw hole is provided on the inner shaft tube. The bottom of the inner shaft tube contacts the upper part of the inner ring. The first countersunk head screw is inserted through the first countersunk head hole on the inner ring and screwed into the first screw hole on the inner shaft tube. A first internal thread is provided on the inner side wall of the inner shaft tube. A first external thread is provided on the end cap. The magnet is placed in the inner shaft tube, and the bottom of the magnet contacts the upper part of the inner ring. The end cap is screwed onto the first internal thread of the inner shaft tube through its first external thread, and the end cap abuts against the magnet. It further includes a second countersunk head screw. A second countersunk head hole is provided on the outer ring. A second screw hole is provided on the outer shaft tube. The upper part of the outer shaft tube contacts the bottom of the outer ring. The second countersunk head screw is inserted through the second countersunk head hole on the outer ring and screwed into the second screw hole on the outer shaft tube.

2. The multifunctional insulated screwdriver according to claim 1, Characterized in that: The insulating cover is composed of upper and lower parts, and the upper and lower parts of the insulating cover are connected by threads.

3. The multifunctional insulated screwdriver according to claim 1, Characterized in that: The central axis tube is T-shaped, and the limiting part of the central axis tube is the upper edge of the T-shaped central axis tube.

4. The multi-functional insulated screwdriver according to claim 1, characterized in that: The lower end of the bit is straight, cross, multi-point, square, triangular, hexagonal, Y-shaped or U-shaped.

5. The multi-functional insulated screwdriver according to claim 1, characterized in that: The bit is coated with a zirconia insulation coating except for the lower end part.

6. The multi-functional insulated screwdriver according to claim 1, characterized in that: The insulating cover is made of transparent polycarbonate material.

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