A self-locking welding nail puller

Abstract

A self-locking welding nail puller belongs to the field of automobile sheet metal dent repair devices. It includes a hammer rod, characterized in that: a self-locking clamp is installed at the front end of the hammer rod, a handle is installed at the rear end of the hammer rod, and a cylindrical sliding block is mounted on the hammer rod; the self-locking clamp can automatically clamp and fix the rod-shaped welding nail. The present invention can automatically clamp the straight rod-shaped welding nail, which is convenient for pulling and applying force to it and fixing it tightly. Even ordinary technicians can master the installation operation skills with a little practice, which effectively guarantees work efficiency and safety of use.

Description

Technical Field

[0001] The invention belongs to the field of devices for repairing dents in automobile sheet metal, and particularly relates to a nail welding hammer. Background Art

[0002] When a car is struck, the sheet metal on its surface can deform, leaving a dent or valley that can affect the car's appearance. There are two common methods for repairing this type of sheet metal: traditional repair, which involves prying back the dent and then repairing it with a hammer and shims; and sheet metal reshaping equipment, which can restore the original shape.

[0003] The first method is simple in principle, but requires workers to be extremely skilled in operation. In addition, since many car body panels are restricted by welded internal panels and windows and other structures, it is difficult to reach their interior, or it is impossible to use a pry pick to pry them up using existing holes, or because the damage is relatively minor and limited to the metal outer panel, there is no internal damage. If the traditional repair process is used to remove the inner panel or dismantle the related structures to repair the dents in the car body outer panel, the workload for car body maintenance will be increased a lot, and production efficiency will be greatly reduced. The entire repair process is time-consuming and labor-intensive, and the effect is difficult to guarantee.

[0004] The second repair method is to use Figure 1 As shown in the welding nail, Figure 2 The front end of the rivet is welded to the depression in the car's sheet metal. The rear end of the rivet is then tightened with a puller and pulled outward until the depression is flattened. Due to the varying shapes of depressions, various rivet shapes are used. Complex rivets are often easily secured with a pull hammer, while smooth, straight rivets are prone to slipping out of the pull hammer during the pulling process, making them difficult to secure securely. Typically, the front end of a rivet is a spherical or conical shape of varying sizes, suitable for repairing circular or conical depressions. This high frequency of use makes the pull hammer structure used for straight rivets even more urgently in need of upgrades.

[0005] In view of this, the applicant has designed this device, which can effectively solve the above technical problems. This device can automatically clamp the rear end of a straight rod-shaped welding nail, making it convenient to pull it out. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a self-locking welding nail puller, which can automatically clamp the rear end of a straight rod-shaped nail to facilitate the pulling operation.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: to provide a self-locking welding nail puller, including a hammer rod, characterized in that: a self-locking clamp is installed at the front end of the hammer rod, a handle is installed at the rear end of the hammer rod, and a cylindrical sliding block is mounted on the hammer rod; the self-locking clamp can clamp and fix the rod-shaped nail.

[0008] Preferably, the self-locking clamp further comprises a return spring base, a return spring mounting post is provided at the front end of the return spring base, a return spring is sleeved outside the return spring mounting post, and a rear end of the return spring abuts against the return spring base;

[0009] An insertion post is provided at the front end of the reset spring mounting post, an insertion hole is provided at the front end of the insertion post, the rear end of the tightening spring base is inserted into the insertion hole, a tightening spring mounting post is provided at the front end of the tightening spring base, a tightening spring is sleeved outside the tightening spring mounting post, and the rear end of the tightening spring presses against the tightening spring base;

[0010] The invention also includes a jaw mounting sleeve, the jaw mounting sleeve is cylindrical, a tightening ring is provided at the front end opening of the jaw mounting sleeve, a jaw is provided on the tightening ring, and the rear end opening of the jaw mounting sleeve is fixedly sleeved on the insertion column, and the tightening spring is provided in the jaw mounting sleeve; a frustum-shaped clamp block group is provided between the tightening ring and the tightening spring, the clamp block group includes more than two clamp blocks, the large diameter end of the clamp block group is tightened by the tightening spring, and the small diameter end of the clamp block group can be inserted into the jaw of the tightening ring;

[0011] The outer sleeve is cylindrical in shape, and a mounting ring is provided at the front end opening of the outer sleeve. The mounting ring has a mounting opening, and the middle part of the top block is fixed in the mounting opening. The front end of the top block extends out of the outer sleeve, and the rear end of the top block is located in the outer sleeve. A through hole is provided on the top block. The outer sleeve is sleeved on the front end of the reset spring mounting column.

[0012] When the outer sleeve is moved backward, the rear end of the outer sleeve compresses the reset spring. At the same time, the top block can push the clamp block group to overcome the elastic force of the tightening spring and retreat. The front ends of the clamp blocks of the clamp block group open outward after exiting the jaws. At this time, the rod-shaped meson can be directly inserted between the clamp blocks from the through hole of the top block; the outer sleeve is loosened, and the outer sleeve moves forward under the elastic force of the reset spring. The tightening spring pushes the front ends of the clamp blocks to be tightened by the jaws again. At this time, the clamp blocks can clamp the rod-shaped meson.

[0013] At this time, the staff can hold the handle with one hand and use the other hand to repeatedly pull the cylindrical sliding block back along the hammer rod until the front end of the rod-shaped meson flattens the concave part.

[0014] Preferably, a smooth inclined surface is provided on the outer side of the clamp block, and clamp teeth are provided on the inner side of the clamp block.

[0015] Preferably, the self-locking clamp further comprises a connecting base, the rear end of the connecting base is connected to the front end of the hammer rod, and the front end of the connecting base is connected to the rear end of the reset spring base.

[0016] Preferably, it further comprises a pull-back sleeve, which is threadedly sleeved on the outer wall of the rear end of the outer sleeve, and threads or dot-shaped anti-slip protrusions are provided on the outer peripheral wall of the pull-back sleeve.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention can automatically clamp the straight rod-shaped welding nail meson, making it convenient to pull and apply force to the straight rod-shaped welding nail meson and fix it tightly. Even ordinary technicians can master the installation operation skills with a little practice, which effectively ensures work efficiency and safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a straight rod type welding nail;

[0020] Figure 2 This is a schematic diagram of the structure of the use of straight rod type welding nails;

[0021] Figure 3 It is a structural schematic diagram of the present invention;

[0022] Figure 4 yes Figure 3 AA sectional view;

[0023] Figure 5 This is a schematic diagram of the structure of the self-locking clamp (the clamp block group is closed);

[0024] Figure 6 This is a schematic diagram of the structure of the self-locking clamp (with the clamp block group open);

[0025] Figure 7 This is a schematic diagram of the structure of a self-locking clamp fixing a straight rod-shaped meson;

[0026] Figure 8 It is a structural diagram of the clamp block group in the closed state;

[0027] Figure 9 yes Figure 8 Schematic diagram of the B-direction structure;

[0028] Figure 10 This is a structural diagram of the clamp block group in the open state;

[0029] Figure 11 yes Figure 10 Schematic diagram of the C-direction structure;

[0030] In the figure: 1. Straight rod-shaped meson; 2. Concave part;

[0031] 3. Self-locking clamp: 3.1. Connecting base; 3.2. Pullback sleeve; 3.3. Return spring; 3.4. Return spring mounting post; 3.5. Insertion hole; 3.6. Insertion post; 3.7. Jaw mounting sleeve; 3.8. Clamp block; 3.9. Clamp teeth; 3.10. Ejector block; 3.11. Mounting opening; 3.12. Mounting ring; 3.13. Through hole; 3.14. Jaw; 3.15. Retaining ring; 3.16. Tension spring; 3.17. Tension spring mounting post; 3.18. Tension spring base; 3.19. Return spring base.

[0032] 4. Hammer rod; 5. Cylindrical sliding block; 6. Handle. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0034] The present invention discloses a self-locking stud puller comprising a hammer rod, a self-locking clamp mounted at the front end of the hammer rod, a handle mounted at the rear end of the hammer rod, and a cylindrical sliding block mounted on the hammer rod. The self-locking clamp is capable of clamping and securing the rod-shaped stud. In the present invention, the side facing the handle is defined as the rear side, and the opposite side is defined as the front side.

[0035] The self-locking clamp includes a connecting base, the rear end of which is connected to the front end of the hammer rod, which in turn is connected to the rear end of the return spring base. The front end of the return spring base is provided with a return spring mounting post, which is fitted with a return spring, and the rear end of the return spring abuts against the return spring base.

[0036] An insertion post is provided at the front end of the reset spring mounting post, an insertion hole is provided at the front end of the insertion post, the rear end of the tightening spring base is inserted into the insertion hole, a tightening spring mounting post is provided at the front end of the tightening spring base, a tightening spring is sleeved outside the tightening spring mounting post, and the rear end of the tightening spring presses against the tightening spring base;

[0037] It also includes a jaw mounting sleeve, which is cylindrical, and a tightening ring is provided at the front end opening of the jaw mounting sleeve, a jaw is provided on the tightening ring, and the rear end opening of the jaw mounting sleeve is fixedly sleeved on the insertion column, and the tightening spring is provided in the jaw mounting sleeve; a frustum-shaped clamp block group is provided between the tightening ring and the tightening spring, and the clamp block group includes more than two clamp blocks, the large diameter end of the clamp block group is tightened by the tightening spring, and the small diameter end of the clamp block group can be inserted into the jaw of the tightening ring; a smooth inclined surface is provided on the outer side of the clamp block, and clamp teeth are provided on the inner side of the clamp block.

[0038] It also includes an outer sleeve, which is cylindrical in shape. A mounting ring is provided at the front end opening of the outer sleeve. A mounting opening is provided on the mounting ring. The middle part of the top block is fixed in the mounting opening. The front end of the top block extends out of the outer sleeve, and the rear end of the top block is located in the outer sleeve. A through hole is provided on the top block. The outer sleeve is sleeved on the front end of the reset spring mounting column.

[0039] It also includes a pull-back sleeve, which is sleeved on the outer wall of the rear end of the outer sleeve through a thread, and a thread or a dot-shaped anti-slip protrusion is arranged on the outer peripheral wall of the pull-back sleeve.

[0040] When the sleeve and outer sleeve are moved backward and pulled back, the rear end of the outer sleeve compresses the reset spring. At the same time, the top block can push the clamp block group to overcome the elastic force of the tightening spring and retreat. The front ends of the clamp blocks of the clamp block group open outward after exiting the jaws. At this time, the rod-shaped meson can be directly inserted between the clamp blocks through the through hole of the top block; the outer sleeve is released, and the outer sleeve moves forward under the elastic force of the reset spring. The tightening spring pushes the front ends of the clamp blocks to be tightened by the jaws again. At this time, the teeth on the inner wall of each clamp block clamp the rod-shaped meson. At this time, the staff can hold the handle with one hand and repeatedly pull back the cylindrical sliding block along the hammer rod with the other hand until the front end of the rod-shaped meson flattens the concave part.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments with equivalent variations. Any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention shall remain within the scope of protection of the present invention.

Claims

1. A self-locking welding nail puller, comprising a hammer rod, characterized in that: A self-locking clamp is installed at the front end of the hammer rod, a grip is installed at the rear end of the hammer rod, and a cylindrical sliding block is mounted on the hammer rod; the self-locking clamp can clamp and fix the rod-shaped welding nail; The self-locking clamp comprises a return spring base, a return spring mounting column is arranged at the front end of the return spring base, a return spring is sleeved outside the return spring mounting column, and the rear end of the return spring abuts against the return spring base; An insertion column is arranged at the front end of the reset spring installation column, an insertion hole is arranged at the front end of the insertion column, the rear end of the tightening spring base is inserted into the insertion hole, a tightening spring installation column is arranged at the front end of the tightening spring base, a tightening spring is sleeved outside the tightening spring installation column, and the rear end of the tightening spring is against the tightening spring base; It also includes a jaw mounting sleeve, which is cylindrical, a tightening ring is arranged at the front end opening of the jaw mounting sleeve, a jaw is provided on the tightening ring, and a rear end opening of the jaw mounting sleeve is fixedly sleeved on the insertion column, and the tightening spring is arranged in the jaw mounting sleeve; a frustum-shaped clamp block group is arranged between the tightening ring and the tightening spring, and the clamp block group includes more than two clamp blocks, the large diameter end of the clamp block group is tightened by the tightening spring, and the small diameter end of the clamp block group can be inserted into the jaw of the tightening ring; It also includes an outer sleeve, which is in a cylindrical shape, a mounting ring is arranged at the front end opening of the outer sleeve, a mounting opening is arranged on the mounting ring, a middle part of the top block is fixed in the mounting opening, the front end of the top block extends out of the outer sleeve, and the rear end of the top block is located in the outer sleeve; a through hole is arranged on the top block; the outer sleeve is sleeved on the front end of the reset spring mounting column; When the outer sleeve is moved backward, the rear end of the outer sleeve compresses the reset spring, and at the same time, the top block can push the clamp block group to overcome the elastic force of the tensioning spring and retreat. The front ends of the clamp blocks of the clamp block group open outward after exiting the jaws. At this time, the rod-shaped welding nail can be directly inserted between the clamp blocks from the through hole of the top block; the outer sleeve is loosened, and the outer sleeve moves forward under the elastic force of the reset spring, and the tensioning spring pushes the front ends of the clamp blocks to be tightened by the jaws again, and at this time, the clamp blocks clamp the rod-shaped welding nail; It also includes a pull-back sleeve, which is sleeved on the outer wall of the rear end of the outer sleeve through a thread, and a thread or a dot-shaped anti-slip protrusion is arranged on the outer peripheral wall of the pull-back sleeve.

2. A self-locking welding stud puller according to claim 1, characterized in that: A smooth inclined surface is arranged on the outer side of the clamp block, and clamp teeth are arranged on the inner side of the clamp block.

3. A self-locking welding stud puller according to claim 1, characterized in that: The self-locking clamp also includes a connecting base, the rear end of the connecting base is connected to the front end of the hammer rod, and the front end of the connecting base is connected to the rear end of the return spring base.

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