WO2002078910A1

WO2002078910A1 - High-speed socket wrench

Info

Publication number: WO2002078910A1
Application number: PCT/KR2002/000556
Authority: WO
Inventors: Jeong-Woo Lee
Original assignee: Jeong-Woo Lee
Priority date: 2001-03-30
Filing date: 2002-03-29
Publication date: 2002-10-10

Abstract

The present invention relates to a socket wrench which fastens or unfastens members such as bolts or nuts by step-up or step-down revolution, and in particular, to a wrench unit which is equipped with a transmission gear unit to control the conversion of acceleration/deceleration, a step-up controller to control the step-up revolution, and a reduction controller to control the step-down revolution, the high-speed socket wrench capable of up and down movement along the surface of outer circumference in the above wrench unit, consisting of a ratchet handle to revolve itself by getting gear-driven by force applied to the step-up/step-down controllers so that it should enable not just increasing the speed of simple and repetitive work but tightening or loosening bolts or nuts with limited force as well.

Description

HIGH-SPEED SOCKET WRENCH

Technical Field

Background Art

Usually, the socket wrench is used to easily screw nuts and bolts.

A manual socket wrench is available to fit a bolt or nut to be fastened or unfastened. After combining the socket with a suitable handle chosen depending on the place or torque, the operator should apply force to the handle for revolution to tighten or loosen the bolt or nut. Some of these diverse socket wrenches, needing a ratchet handle, are subjected to repetitive revolution by a given angle in succession until the bolt gains force in contact with an appropriate member. Therefore such simple repetitive movements certainly not only make the operator feel tired but also waste much time to fulfiil the operation. In addition, the operators cannot help suffering great inconvenience from holding the socket in one hand and operating the ratchet handle in the other hand due to the frequent racing of socket wrench. When attempting to loosen tightly fastened screws with conventional socket wrenches, operators expose themselves to injury such as hurting or overstraining their hands.

Disclosure of the Invention

The present invention was invented to solve the above mentioned problems. That is, the purpose of this invention is not just to enable fastening or unfastening of bolts or nuts quickly through a transmission gear unit (in a wrench unit) controlling the conversion of acceleration and deceleration but also to enable tightening or loosening of nuts and bolts with limited force so as to reduce operators' fatigue caused by repetition of simple movement. To achieve this purpose, the transmission gear unit is provided in the center of a circle-type wrench unit, a step-up controller is provided on one side of the transmission gear unit, and a reduction (step-down) controller is provided on the other side. The reduction controller performs tens of accelerating revolutions according to revolution by the step-up controller, whereas the step-up controller performs the decelerating revolution according to tens of revolutions by the reduction controller. As a result, great torque is generated. The wrench unit is also characterized by comprising a ratchet handle to make revolution of step-up/reduction controllers by getting gear driven, moving between those two controllers on the surface of outer circumference.

Brief Description of the Drawings

FIG. 1 is a top view of a preferred embodiment of a high-speed socket wrench according to the present invention;

FIG. 2 is a state diagram showing how the wrench unit is combined with the ratchet handle in a high-speed socket wrench according to the present invention; FIG. 3 is a cross-sectional view of a high-speed socket wrench according to the present invention; and

FIG. 4 is a cross-sectional view taken along 'A-A Line' of FIG. 3.

Best mode for carrying out the Invention

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

As shown in FIGS. 1 to 4, a high-speed socket wrench according to the present invention comprises a circle-type wrench unit which is equipped with a transmission gear unit (7) to control the conversion of acceleration/deceleration, a step-up controller (6) to control accelerating revolution, a reduction controller (8) to control the decelerating revolution, and a normal socket (17) which is capable of up and down movement along the surface of the outer circumference of a wrench unit, consisting of a ratchet handle to revolve itself by getting gear-driven by force applied to the step-up/step-down controllers (in the wrench unit(2)) and connecting slot (18).

The step-up controller (6) is provided on one side of the wrench unit (2), and the reduction controller (8) is provided on the other side. As a result, the reduction controller performs tens of accelerating revolutions according to revolution by the step-up controller, whereas the step-up controller performs the decelerating revolution according to tens of revolutions by the reduction controller. As a result, great torque is generated.

In the transmission gear unit (7), an inscribed gear (11), manifold planetary gears (13) and a sun gear (16) engage with one another to get driven together. The bottom of the inscribed gear (11) is open, whereas its top is a short clogged cylinder-type. In the center of the top, there is a central axis (20) of the inscribed gear which is fixed integrally onto the step-up controller (6). Accordingly, as this controller revolves, the inscribed gear (11) revolves together. On the^'surface of the inner circumference of the inscribed gear (11), there is a gear to engage with the manifold planetary gears (13) inside.

Each manifold planetary gear (13) with a cylinder-type all tooth with the sun gear (16), and gets transmitted turning force from the inscribed gear (11) or sun gear (16) to rotate on its axis while revolving around the sun gear. Through this process, the step-up/step-down revolution of inscribed gear (11) or the sun gear (16) corresponding to a prescribed ratio of step-up to step-down, that is, the ratio of engagement among sun gear (16), manifold planetary gears (13) and inscribed gear (11), is accomplished.

As necessary, the ratio of step-up to step down with a variation of the number of gears such as the planetary gears (13), inscribed gear (11) and sun gear (16). The sun gear (16) is centered in the transmission gear unit (7) and its bottom is fixed integrally onto the reduction controller (8) so that both should revolve together.

The step-up controller (6) is available to quickly fasten or unfasten a bolt (19) or nut with many screw threads by the step-up revolution of the reduction controller (8). It is also fixed integrally onto the central axis of inscribed gear (11) so that both revolve together. On the surface of the outer circumference, the step-up controlling gear (10) engages with a ratchet handle gear (5) (in a ratchet handle (1)) to get driven to revolve. In the middle of the top, there is a step-up controller fixed projection (9) which should be put into the connecting slot (18) of the socket (17) before starting the revolution of the reduction controller (8). In the end, revolving the reduction controller (8) generates great torque through the decelerating revolution of the step-up controller (6), which may unfasten or fasten a bolt or nut in a proper manner. The reduction controller (8) is available to unfasten or fasten a tightened bolt or nut with great torque occurring simultaneously with the decelerating revolution of the step-up controller (6). It is also fixed integrally onto the sun gear (16) so that both revolve together. On the surface of the outer circumference, the reduction controlling gear (14) engages with the ratchet handle gear (5) (in the ratchet handle (1)) to get driven to revolve. In the middle of the top, there is a reduction controller fixed projection (15) which should be put into the connecting slot (18) of the socket (17) before starting the revolution of the step-up controller (6) gets started. In the end, the step-up controller (6) enables the unfastening or fastening the bolts or nuts with many screw threads in a short time over the accelerating revolution of reduction controller (8). The ratchet handle (1 ) consists of a rod-type handle (3) and a circle ring (4) which is fixed integrally on the end of this handle with a ratchet handle gear (5) built on the surface of inner circumference. On the inside of the circle ring (4), the wrench unit (2) is inserted so that its step-up or step-down revolution is enabled while moving the ratchet handle (1) to the step-up controller (6) or reduction controller (8). The ratchet handle gear (5) of the circle ring (4) has a tooth form in conformity with those of the step-up controlling gear (10) and the reduction controlling gear (14). A description of the operation of the present invention follows. If you are fastening or unfastening a bolt or nut with many screw threads quickly, you will first have to make step-up revolution of the reduction controlling fixed projection (15) (in the wrench unit (2)). Therefore, move the ratchet handle (1) to the step-up controller (6), next connect the socket (17) with the reduction controlling fixed projection (15) (in the reduction controller (8)), and then combine the bolt (19) or nut with the socket (17). According to the revolution of the step-up controller (6) by the ratchet handle (1), the inscribed gear (1 1) which is attached integrally to the step-up controller (6) will rotate as well to finally turn the manifold planetary gears (13) combined with the inscribed gear (1 1). By the revolution and rotation of these planetary gears, the step-up motion will be accomplished depending on the ratio of engagement among them, which will therefore turn the toothed sun gear (16) in acceleration. Even though turning the step-up controller (6), attached integrally to the sun gear(16), round by about 45°, you will be able to quickly fasten or unfasten the bolt (19) or nut connected with the socket (17) because the reduction controller (8) will be running tens of step-up revolutions depending on the established ratio of engagement between the sun gear (16) and planetary gears (13).

In the following, if you are unfastening or fastening a tightened bolt or nut, you will first have to make step-down revolution of the step-up controlling fixed projection (9) (in the wrench unit (2)). Therefore move the ratchet handle (1) to the reduction controller (8), next connect the socket (17) with the step-up controlling fixed projection (9) (in the step-up controller (6)), and then combine the bolt (19) or nut with the socket (17). According to the revolution of reduction controller (8) by the ratchet handle (1), the sun gear (16) which is attached integrally to the reduction controller (8) will rotate as well to finally turn the manifold planetary gears (13). By the revolution and rotation of these planetary gears, the reduction motion will be accomplished depending on the ratio of engagement among them, which will consequently turn the toothed inscribed gear (11) in deceleration. Great torque will be generated the moment the step-up controller (6), attached in on to this inscribed gear (11), gets step-down. As a rule, if you turn the reduction controller (8) round tens of times with the ratchet handle (1), the step-up controller (6) will then run the step-down revolution depending on the prescribed ratio of tooting between the sun gear (16) and the planetary gears (13). This will result in the generation of great torque enabling the tightening up or easily loosening of the bolt(19) or nut connected with the socket (17).

Industrial Applicability The present invention enables the operator to fasten or unfasten a bolt or nut in a short time through the transmission gear unit of a wrench unit to control the conversion of acceleration/deceleration and reduces fatigue caused by simple repetitive movement. The result is a rise in the operator's work efficiency.

Claims

What is claimed is:

1. A high-speed socket wrench using a ratchet handle combined to a common socket with a connecting slot, the socket wrench comprising: a step-up controller provided at tine side of the socket wrench and a reduction controller provided at the other side thereof, with respect to a transmission gear unit for controlling conversion of acceleration/deceleration; a wrench unit in which turning the step-up controller revolves the reduction controller in acceleration while turning the reduction controller revolves the step-up controller in deceleration, generating a great torque; a circle ring unit into which the wrench unit is inserted and having a ratchet handle gear which has a tooth form in conformity with those of the step-up controlling gear and the reduction controlling gear formed on the surface of the inner circumference of the wrench unit; and a ratchet handle capable of moving up and down along the outer circumferential surface of the wrench unit to rotate the step-up controller and the reduction controller of the wrench unit by means of gear driving.

2. The high-speed socket wrench of claim 1 , wherein the transmission gear unit comprises an inscribed gear, manifold planetary gears, and a sun gear engaged with one another to gain gear-driven in a cylindrical housing, the top of the inscribed gear is a short clogged cylinder-type, a central axis of the inscribed gear is formed in the center of the top of the inscribed gear, the central axis of the inscribed gear is fixed integrally onto the step-up controller, so that, as the controller revolves, the inscribed gear rotates together, a gear is formed on the surface of the inner circumference of the inscribed gear to be engaged with the manifold planetary gears, the manifold planetary gears with a cylinder-type is engaged with the sun gear, transferring a turning force from the inscribed gear to rotate on its axis while revolving around the sun gear, in these processes, the step-up/step-down revolution of the sun gear corresponding to the ratio of engagement among the sun gear, the planetary gears, and the inscribed gear, and the sun gear is located in the middle of the transmission gear unit and the bottom thereof is fixed integrally onto the reduction controller to rotate together.

3. The high-speed socket wrench of claim 1 , wherein the step-up controller quickly fastens or unfastens a bolt or nut with many screw threads through the step-up revolution of the reduction controller while turning together with the inscribed gear, the step-up controlling gear formed on the outer circumferential surface thereof is engaged with the ratchet handle gear (in the ratchet handle) to be driven for revolution, a step-up controller fixed projection formed in the middle of the top thereof is inserted into the connecting slot of the socket before starting the revolution of the reduction controller, and the reduction controller revolving generates a great torque through the decelerating revolution of step-up controller, which unfastens or fastens the tightened bolt or nut.

4. The high-speed socket wrench of claim 1 , wherein the reduction controller unfastens or fastens a tightened bolt or nut with a great torque occurring simultaneously with the decelerating revolution of the step-up controller, the reduction controller integrally fixed onto the sun gear to rotate together, the reduction controlling gear formed on the outer circumferential surface thereof is engaged with the ratchet handle gear (in the ratchet handle) to be driven for revolution, a reduction controller fixed projection formed in the middle of the top thereof is inserted into the connecting slot of the socket before staring the revolution of the step-up controller, and the step-up controller revolving unfastens or fastens the boit or nut with many screw threads over the accelerating revolution of the reduction controller.