CN111843936A

CN111843936A - Strong nail puller

Info

Publication number: CN111843936A
Application number: CN202010659519.6A
Authority: CN
Inventors: 罗坤; 陈国辉; 刘高强; 肖琼辉; 李涛; 郭慧初; 肖杰; 方平
Original assignee: HUNAN SUNPEAK CONSTRUCTION CO Ltd
Current assignee: HUNAN SUNPEAK CONSTRUCTION CO Ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2020-10-30
Anticipated expiration: 2040-07-09
Also published as: CN111843936B

Abstract

A powerful nail puller comprises a first handle rod, a second handle rod, a sleeve and a clamp, wherein the clamp is fixed at the bottom end of the first handle rod; the sleeve is arranged at the lower part of the first handle rod and can move along the length direction of the first handle rod, and the sleeve is provided with a rack arranged along the length direction of the first handle rod; a small shaft is arranged at the lower part of the first handle rod, a gear is sleeved on the small shaft and provided with an inner ratchet gear ring, a driving disc is fixed on the small shaft, one end of a driving pawl is hinged with the driving disc, and the other end of the driving pawl is abutted to a ratchet of the inner ratchet gear ring; the lower end of the second handle rod is fixed on the small shaft; the lower end of the first handle rod is also hinged with a stopping pawl, and the front end of the stopping pawl can be inserted into wheel teeth of the gear; a through groove is formed in the second handle rod, the upper end of the supporting rod penetrates through the through groove to be located in the sliding groove of the first handle rod, and the lower end of the supporting rod is hinged to one side of the clamp. The invention saves time and labor when pulling out the nail, can reduce the damage to the plate, and the pulled out nail can be reused.

Description

Strong nail puller

Technical Field

The invention belongs to a nail pulling tool, in particular to a powerful nail puller.

Background

At present, nails are still pulled out by adopting a nail hammer on the site, the nail is pulled out by clamping the head of the nail through the nail pulling groove and swinging the nail hammer towards one side. However, when the nail head is embedded to a certain depth, the nail hammer cannot exert force, and when the nail is long, the nail hammer cannot exert force, the nail is easy to deform and damage the plate in the removing process, and the nail is easy to loose strength after being removed for a long time.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: overcomes the defects of the prior art and provides a strong nail puller which can prevent nails and plates from being damaged in the nail pulling process.

In order to solve the problems, the invention adopts the technical scheme that: a powerful nail puller comprises a first handle rod, a second handle rod, a sleeve and a clamp for clamping a nail, wherein the clamp is fixed at the bottom end of the first handle rod; the sleeve is arranged at the lower part of the first handle rod and can reciprocate along the length direction of the first handle rod, and the sleeve is provided with a rack arranged along the length direction of the first handle rod; a small shaft arranged in the radial direction is installed at the lower part of the first handle rod, a gear meshed with the rack is installed in the small shaft in a sleeved mode, an inner ratchet gear ring is arranged on the gear, a driving disc is fixedly installed on the small shaft, one end of a driving pawl is hinged to the driving disc, and the other end of the driving pawl is abutted to a ratchet of the inner ratchet gear ring; the lower end of the second handle rod is fixedly arranged on the small shaft; the lower end of the first handle rod is also hinged with a stopping pawl, and the front end of the stopping pawl can be inserted between the gear teeth of the gear; and a through groove is formed in the second handle rod, the upper end of the supporting rod penetrates through the through groove to be positioned in the sliding groove of the first handle rod, and the lower end of the supporting rod is hinged with one side of the clamp.

When the nail needs to be pulled out, the nail is put into the clamp, the bottom end of the sleeve is tightly attached to the plate, then the second handle rod is rotated, the supporting rod is pressed down to enable the clamp to be clamped tightly, the front end of the stop pawl is inserted into the gear teeth of the gear to prevent the gear from reversing, the small shaft drives the driving disc to rotate, the driving pawl drives the ratchet wheel to rotate, the gear rotates on the rack, the first handle rod moves upwards under the action of the gear to drive the clamp to move upwards, and the nail is pulled out. Then, after the second handle lever is rotated in the reverse direction to the initial position, the stopping pawl is disengaged from the gear, the clamp is released, the nail is dropped, and the sleeve can be moved to the initial position.

Preferably, a first return spring is installed in the first handle rod, one end of the first return spring is connected with the upper portion of the first handle rod, and the other end of the first return spring penetrates through the side wall of the first handle rod and is connected with the sleeve. The first return spring may cause the sleeve to automatically return.

Preferably, the top end of the first handle rod is provided with an adjusting screw rod, and the bottom end of the adjusting screw rod is abutted to the upper end of the supporting rod. The position of the lower end of the supporting rod in the supporting rod can be adjusted through the adjusting screw rod, and the acting force of the lower end of the supporting rod on the clamp can be adjusted.

Preferably, the lower extreme of first handle pole is connected with the fine setting screw through the screw support, the bottom of fine setting screw and the one side butt that the bracing piece was kept away from to anchor clamps. The fine adjustment screw is used for fine adjustment of the clamp when the clamp is worn or a nail cannot be placed into the clamp.

Preferably, a second return spring is arranged between one side of the clamp provided with the supporting rod and the first handle rod. The second return spring enables the clamp to automatically return.

Preferably, the clamp comprises two oppositely arranged clamping heads, and one side, opposite to the two clamping heads, of each clamping head is provided with a notch.

Preferably, the outer side of the sleeve is also provided with a pedal. The pedal is convenient to enable the sleeve to abut against the plate when the nail is pulled out.

The invention has the beneficial effects that: the nail puller has the advantages that the structure is simple, a power supply is not needed, the mechanical principle is met, time and labor are saved during nail pulling, damage to plates and nails is reduced during nail pulling, and the pulled nails can be recycled; the invention converts the rotation of the ratchet wheel into the linear movement of the clamp, can pull out the nails embedded deeply, and can pull out the nails for a long time without physical weakness by constructors, thereby improving the working efficiency and saving resources.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a perspective view of FIG. 1;

FIG. 3 is an internal structural view of the sleeve of the present invention;

fig. 4 is a side view of the clamp of the present invention.

Detailed Description

As shown in figures 1 to 4, the powerful nail puller comprises a first handle rod 1, a second handle rod 2, a clamp 3 and a sleeve 4. The sleeve 4 is mounted on the lower portion of the first handle lever 1 and is movable along the length of the first handle lever 1. A clamp 3 is mounted at the bottom end of the first handle lever 1. The lower part of the first handle rod 1 is provided with a small shaft 16 in the radial direction (the direction vertical to the length direction of the first handle rod), the small shaft 16 is sleeved with a gear 15, the gear 15 is provided with an inner ratchet gear ring 12, and the gear 15 does not rotate along with the small shaft 16. And a driving disc 17 is fixedly arranged on the small shaft 16, one end of the driving pawl 11 is hinged with the driving disc 17, and the other end of the driving pawl can be abutted against the ratchet of the inner ratchet gear ring 12. The lower end of the second handle lever 2 is fixedly mounted on the small shaft 16. The lower end of the first handle lever 1 is also hinged with a stop pawl 7, and the front end of the stop pawl 7 can be inserted between the teeth of the gear 15. A through groove is formed in the second handle rod 2, the support rod 5 penetrates through the through groove, the lower end of the support rod is hinged to one side of the clamp 3, and the upper end of the support rod 5 is located in a sliding groove in the upper portion of the first handle rod 1.

The support bar 5 is formed by hinging two bar pieces. The upper end of the support rod 5 can be contacted with or separated from the adjusting screw 6 at the top end of the first handle rod 1. The lower part of the first handle rod 1 is also provided with a fine adjustment screw 8 through a screw support, and the bottom end of the fine adjustment screw 8 is abutted against one side of the clamp 3 far away from the support rod 5. Torsion springs are mounted on hinged shafts of the driving pawl 11 and the stopping pawl 7.

In this embodiment, a first return spring 13 is further disposed inside the first handle bar 1, one end of the first return spring 13 is connected to the upper portion of the first handle bar 1, and the other end of the first return spring 13 passes through a gap in the side wall of the first handle bar 1 and is connected to the sleeve 4. A second return spring 9 is arranged on one side of the clamp 3, which is provided with the support rod 5, with the first handle rod 1.

In this embodiment, a pedal 10 is fixed to the outside of the sleeve 4. The clamp 3 comprises two oppositely arranged clamping heads 31, and the opposite sides are provided with notches 32. The collet 31, in which the support rod 5 is coupled, can be rotated relative to the other collet 31 to tighten or loosen the clamp 3.

When needing to pull out the nail, hold first handle pole 1 and strike 8 tip of fine setting screw gently, make the nail cap imbed in 3 notches of anchor clamps, push down first handle pole 1, utilize lever principle, perk the nail a little, then rotatory second handle pole 2 pushes down bracing piece 5, and the lower extreme of bracing piece 5 makes anchor clamps 3 tighten up for the anchor clamps application of force, and second reset spring 9 is stretched, and detent 7 supports gear 15. At this time, the pedal 10 is stepped down to make the bottom end of the sleeve 4 tightly contact with the plate, the second handle rod 2 is continuously rotated to rotate the small shaft 16, so that the driving disc 17 drives the driving pawl 11 to rotate, the inner ratchet gear ring 12 rotates, the gear 15 also rotates on the rack 14, so as to drive the first handle rod 1 and the clamp 3 to move upwards, the nail is extracted, and the first return spring 13 is stretched. If the nail cannot be extracted by a single stroke of rotation, the second handle bar 2 can be swung a plurality of times until the nail is extracted, but the second handle bar 2 does not return to the initial position at the time of swinging to prevent the clamp 3 from being released and the stopping pawl 7 from coming off the gear 15. Finally, the second handle rod 2 is rotated reversely to the initial position, the support rod 5 is released, the clamp 3 loses the pressure of the support rod 5 and is released under the restoring force of the second return spring 9, the nail falls, and the stopping pawl 7 is separated from the gear 15; the first handle lever 1 is held, the pedal 10 is released, the first return spring 13 is returned, and the sleeve 4 returns to the initial position.

Claims

1. A powerful nail puller is characterized by comprising a first handle rod (1), a second handle rod (2), a sleeve (4) and a clamp (3) for clamping a nail, wherein the clamp is fixed at the bottom end of the first handle rod (1); the sleeve (4) is arranged at the lower part of the first handle rod (1) and can reciprocate along the length direction of the first handle rod, and the sleeve (4) is provided with a rack (14) arranged along the length direction of the first handle rod (1); a small shaft (16) arranged in the radial direction is installed at the lower part of the first handle rod (1), a gear (15) meshed with the rack (14) is installed in the small shaft in a sleeved mode, an inner ratchet gear ring (12) is arranged on the gear (15), and a driving disc (17) is fixedly installed on the small shaft; one end of the driving pawl (11) is hinged with the driving disc (17) and the other end is abutted with the ratchet of the inner ratchet gear ring (12); the lower end of the second handle rod (2) is fixedly arranged on the small shaft (16); the lower end of the first handle rod (1) is also hinged with a stopping pawl (7), and the front end of the stopping pawl (7) can be inserted between the gear teeth of the gear (15); a through groove is formed in the second handle rod (2), the upper end of the supporting rod (5) penetrates through the through groove to be located in the sliding groove of the first handle rod (1), and the lower end of the supporting rod (5) is hinged to one side of the clamp (3).

2. A power pin puller as claimed in claim 1, wherein a first return spring (13) is mounted in the first handle lever (1), one end of the first return spring (13) is connected with the upper part of the first handle lever (1), and the other end of the first return spring (13) passes through the side wall of the first handle lever (1) and is connected with the sleeve (4).

3. A powerful nail puller as claimed in claim 1, characterised in that the top end of the first handle bar (1) is provided with an adjusting screw (6), the bottom end of the adjusting screw (6) abutting against the upper end of the support bar (5).

4. A strong nail puller according to claim 1, wherein the lower end of the first handle bar (1) is connected with a fine adjustment screw (8) through a screw support, and the bottom end of the fine adjustment screw (8) is abutted against one side of the clamp (3) far away from the support bar (5).

5. A power pin remover as claimed in claim 1, wherein a second return spring (9) is provided between the side of said clamp (3) provided with said support bar (5) and said first handle bar (1).

6. A power claw according to any of claims 1 to 5, characterised in that the clamp (3) comprises two jaws (31) arranged opposite one another, and in that the jaws (31) are provided with notches (32) on opposite sides.

7. A power pin extractor according to any one of claims 1 to 5, wherein a pedal (10) is provided outside the sleeve.