RATCHET CRIMPING TOOL

• US 20090120245A1
• Filed: 10/31/2006
• Published: 05/14/2009
• Est. Priority Date: 09/27/2006
• Status: Active Grant

• Current Assignee: Link-tech (Tianjin) Metal Products Company Limited
• Original Assignee: Tianjin Runshi Technology Development Co., Ltd.
• Inventors: Zhang, Hanzhen
• Granted Patent: US 7,823,433 B2
• Time in Patent Office: Days
• US Class Current: 81/60
• CPC Class Codes: B25B 27/146 Clip clamping hand tools
• CPC Class Codes: B25B 7/12 involving special transmission means between the handles and the jaws, e.g. toggle levers, gears

Abstract

A ratchet crimping tool is disclosed. The ratchet crimping tool comprises a tool head cover board structure, a tool handle structure, a transmission device, and a tool handle. The transmission device further comprises an anti-backup mechanism, an advancement mechanism and a gear structure. The ratchet crimping tool uses a coaxial tool head, a confirming-indicating device and an adjustable jaw structure. The coaxial tool head comprises a movable tool handle and a fixed tool handle. A gear of the movable tool head is engaged with the gear structure of the transmission device, and the adjustable jaw structure is connected with the movable tool handle. The confirming-indicating device is connected with the movable tool handle and the fixed tool handle respectively. The coaxial tool head is connected with a tool head cover board structure by link pins, and the gear structure of the transmission device is connected with the movable tool handle by connecting pins via upper and lower cover boards. The fixed tool handle is connected with an anti-backup mechanism of the transmission device by connecting pins via the upper and lower cover boards. Between the advancement mechanism of the transmission device and the movable tool handle, a connection is established by advancement of the connecting pins.

Claims

1. A ratchet crimping tool comprising

a tool head cover board structure;

a tool handle structure;

a transmission device comprising an anti-backup mechanism, an advancement mechanism and a gear structure; and

a tool head;

wherein the ratchet crimping tool uses a coaxial tool head, a confirming-indicating device and an adjustable jaw structure, the coaxial tool head comprising a movable tool handle and a fixed tool handle of the tool head, and a gear of the movable tool head is engaged with the gear structure of the transmission device, and the adjustable jaw structure is connected with the movable tool handle, the confirming-indicating device is connected with the movable tool handle and the fixed tool handle respectively;

wherein the coaxial tool head is connected with a tool head cover board structure by link pins, and the gear structure of the transmission device is connected with the movable tool handle by connecting pins via upper and lower cover boards;

the fixed tool handle is connected with an anti-backup mechanism of the transmission device by connecting pins via the upper and lower cover boards;

between the advancement mechanism of the transmission device and the movable tool handle, it establishes a connection by advancement connecting pins.

2. The ratchet crimping tool of claim 1, wherein in the coaxial tool head comprising the movable tool handle and the fixed tool handle, the movable tool handle and fixed tool handle are each provided with a circular concave part that are generally the same size, and wherein a center of the two concave parts is respectively provided with a hole with generally the same size;

and the holes are connected with upper and lower cover boards by a link pin; and

there is a fixed screw on the fixed tool handle and a fixed screw on the movable tool handle, springs for opening and closing a jaw of the movable tool handle are respectively connected with fixed screws, and a gear is disposed under the movable tool handle.

3. The ratchet crimping tool of claim 1, wherein the adjustable jaw structure comprises a screw of the adjustable jaw and a screw cap of the adjustable jaw, and the movable tool handle is provided with a hole, the diameter of which is generally the same as an external diameter of the screw cap, and the screw cap is inserted into the hole of the movable tool handle, and the screw is screwed into the screw cap;

and there are corresponding circle numbers disposed between the screw and the screw cap for adjusting an opening degree of the jaw.

4. The ratchet crimping tool of claim 1, wherein the confirming-indicating device produces at least one of an audio or visual signal when the tool handle closes to certain predetermined position under the action of the transmission device, is one of two types:

a mechanical mechanism confirming-indicating device and an electronic mechanism confirming-indicating device.

5. The ratchet crimping tool of claim 4, wherein the mechanical mechanism confirming-indicating device comprises one of the following:

an audio or visual signal spring that is connected with the movable tool handle by a screw, and

an audio or visual signal spring that is connected with the fixed tool handle by at least one screw.

6. The ratchet crimping tool of claim 4, wherein the electronic mechanism confirming-indicating device comprises a contact of the movable tool handle, a contact of a cover board, metal sheet positive and negative plates, a battery box, a battery, a spring, a signal device and conducting wires;

wherein the contact of the movable tool handle and the contact of the cover board are respectively disposed inside the movable tool handle and inside the upper cover board;

wherein the metal sheet plates, battery box, battery, spring and signal device are disposed inside the fixed tool handle;

wherein the contact of the cover board is connected with a metal sheet positive electrode plate of the battery, and a metal sheet negative electrode plate of the battery is connected with a negative electrode of the signal device and a positive electrode of the signal device is connected with the fixed tool handle;

wherein when the movable tool handle is closed to the designated position, the contact of the movable tool handle contacts with the contact of the cover board, which means the positive electrode and the negative electrode of the battery contact, then the signal device produces an audio or visual signal.

7. The ratchet crimping tool of claim 1, wherein the tool handle structure, comprises a movable tool handle and a fixed tool handle, with the movable tool handle being connected with the gear structure by a link pin via a cover board and the holes on the fixed tool handle is connected with the upper and lower cover boards by connecting pins;

wherein the moveable and fixed tool handles are connected by a spring;

a fixed screw disposed at one side of the fixed tool handle being connected with one end of the spring, the other end of which is connected with a backstop;

the shape of the fixed and moveable tool handles being ergonomically structured.

8. The ratchet crimping tool of claim 1, wherein the anti-backup mechanism of the transmission device comprises a backstop which prevents return of the movable tool handle and a spring;

one end of the backstop being teeth shaped and the other end being provided with a small hole which is connected with one end of the spring, and the other end of the spring being connected with a fixed screw disposed inside the fixed tool handle.

9. The ratchet crimping tool of claim 1, wherein the advancement mechanism of the transmission device is disposed inside the movable tool handle and comprises an advancement and a spring;

one end of the advancement being teeth shaped and the other end being provided with a small hole which is connected with one end of the spring, and the other end of the spring is connected with the fixed pin which is inserted in the movable tool handle;

the teeth shaped end of the advancement being engaged with the gear while the advancement is fixed inside the movable tool handle by advancement connecting pins.

10. The ratchet crimping tool of claim 1, wherein the cover board structure comprises two bending boards which include an upper cover board and a lower cover board, which are coaxially connected to the movable tool handle and fixed tool handle by link pins, respectively;

the gear and the movable tool handle being disposed between the upper and lower cover boards, and the backstop being disposed between the upper and lower cover boards and connected to the upper and lower cover boards by connecting pins;

the fixed tool handle being fixed between the upper and lower cover boards by pins the fixed tool handle.