KR102346003B1 - Removable torque wrench - Google Patents

Abstract

Provided is an electric torque wrench with a removable gearbox. According to the present invention, the electric torque wrench with the removable gearbox comprises an adapter socket which includes: a mainframe casing (10) including a mainframe unit (12) including an electric motor and a motor driver in an inner accommodation space, and a handle unit (14) extended toward a lower side of the mainframe unit; the gearbox (20) dynamically coupled with a motor rotary shaft (13) of the electric motor in front of the mainframe unit (12), increasing/reducing an output in accordance with the driving of the electric motor, and transmitting the output to a tightening member; a coupling adapter installed on a gearbox engagement surface (11) in front of the mainframe unit (12); and a coupling socket fixed on a mainframe engagement surface (21) on a rear side of the gearbox (20) and detachably engaged with the coupling adapter. The present invention aims to provide an electric torque wrench with a removable gearbox, which allows the gearbox to be detachable and removable.

Description

Replaceable Torque Wrench

The present invention relates to a torque wrench, and more particularly, to a replaceable electric torque wrench capable of replacing a gearbox.

A torque wrench is a wrench tool used to tighten a nut to a bolt according to a given torque value. Such a torque wrench is widely used for bolting in various industrial sites such as power plants, petrochemicals, construction, automobiles, shipbuilding, and railways. In the industrial field, the target torque value for each facility determined by trial and error over a long period of time based on standard and theoretical calculations is set as the output torque value, and bolting is performed under strict management.

There are two types of torque wrenches: hydraulic torque wrench and electric torque wrench. A hydraulic torque wrench tightens bolts with a torque corresponding to the hydraulic pressure sent from the hydraulic pump equipment, and an electrically driven torch wrench uses a torque corresponding to the motor driving force generated by the electric motor to tighten the bolts. to conclude

In general, a hydraulic torque wrench is used for bolting work of large equipment or structures that require a large clamping force. On the other hand, since the electric torque wrench has portability that the operator can carry directly, it has the advantage that bolt fastening work is possible without restriction of the work space.

In addition, since the hydraulic torque wrench is connected between the hydraulic pump and the wrench equipment by a hose, it is difficult to change the output torque value in real time. This is because even when the supplied hydraulic pressure is changed, there is a time delay until the output torque value is actually changed.

On the other hand, since the electric torque wrench can control the operation of the electric motor in real time through an electric signal, there is an advantage that the output torque value can be changed in real time.

In general, the electric torque wrench includes a main body in which an electric motor and a motor driver are mounted in an internal accommodation space; a handle portion extending downwardly from the body portion; and a battery unit coupled to a bottom surface of the handle unit.

In addition, the electric torque wrench has a gearbox that is dynamically coupled to the motor rotation shaft of the electric motor in front of the main body portion, increases or decreases output according to the driving of the electric motor, and transmits it to the tightening member.

However, the electric torque wrench according to the prior art is manufactured and released in a state in which the main body casing and the gear box are integrally combined. That is, the electric torque wrench of a single product is manufactured and released only in a form in which a gearbox having a specific single reduction ratio is integrally combined.

When the reduction ratio required for bolting work is different for each industrial site or each facility, it is necessary to purchase several types of electric torque wrench products with different reduction ratios, so that the cost burden is very large.

Also, from a worker's point of view, there is the inconvenience of carrying and carrying several types of electric torque wrench products at the same time.

The present invention is to solve the above problems, the main body casing of the electric torque wrench is used in common, and to provide a replaceable electric torque wrench that can replace the gear box by attaching and detaching the gear box to the main body casing will be.

According to one aspect of the present invention, the gearbox replaceable electric torque wrench includes a body portion 12 on which an electric motor and a motor driver are mounted in an internal accommodation space, and a handle portion 14 extending downwardly of the body portion. body casing (10); a gearbox 20 coupled to the motor rotation shaft 13 of the electric motor at the front of the main body 12 to increase or decrease the output according to the driving of the electric motor and transmit it to the tightening member; a coupling adapter installed on the gearbox coupling surface 11 in front of the main body 12; It includes an adapter socket including; a coupling socket that is fixedly installed on the main body coupling surface 21 of the rear of the gearbox 20 and is detachably coupled to the coupling adapter.

According to the electric torque wrench according to the embodiment of the present invention, the main body casing is used in common, and there is an effect that the gearbox can be replaced and used by attaching and detaching the gearbox to the main body casing.

1 is a view for explaining the concept of a gearbox replacement type electric torque wrench according to an embodiment of the present invention.
2 to 7 are reference views for explaining the adapter socket (adapter socket) used in the gearbox replaceable electric torque wrench.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Throughout this specification, when an element is referred to as “connected” or “coupled” to another element, the one element may be directly connected or directly coupled to the other element, but in particular the opposite is true. Unless there is a description to be used, it will be understood that they may be connected or combined through another element in the middle. In addition, throughout the specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining the concept of a gearbox replacement type electric torque wrench according to an embodiment of the present invention.

Referring to Figure 1, the replaceable electric torque wrench according to the embodiment of the present invention, a main body portion 12 in which an electric motor and a motor driver are mounted in an internal accommodation space, a handle portion 14 extending downward of the main body portion and a main body casing 10 including a detachable battery part 16 coupled to a bottom surface direction of the handle part 14; It is dynamically coupled to the motor rotation shaft (reference number 13 in FIG. 5) of the electric motor at the front of the main body part 12, and increases or decreases the output according to the driving of the electric motor and transmitted to a tightening member a gearbox 20; includes

In addition, the replaceable electric torque wrench includes: a coupling adapter installed on the gearbox coupling surface 11 in front of the main body 12; It includes an adapter socket including; a coupling socket that is fixedly installed on the main body coupling surface 21 of the rear of the gearbox 20 and is detachably coupled to the coupling adapter.

Replaceable electric torque wrench according to an embodiment of the present invention, by using the adapter socket, gearboxes having various reduction ratios in a state in which the common body casing 10 is left as it is (reference numerals 20a, 20b in FIG. 20c) can be used interchangeably.

Hereinafter, the configuration of the adapter socket will be described in detail with reference to FIGS. 2 to 7 . Here, FIGS. 2 to 7 are reference views for explaining an adapter socket used in a gearbox replaceable electric torque wrench.

2 to 7, the coupling socket, the main body coupling surface 21 of the gearbox 20 and a socket base member 210 for face-to-face coupling; a socket function member 240 installed on the socket base member 210; an intermediate intermediary member 220 that mediates coupling between the socket base member 210 and the socket function member 240 in the middle; and an intermediate insertion member 230 seated on the intermediate intermediate member 220 and closely inserted into the inner accommodating space of the socket function member 240 .

Here, the socket base member 210 includes a protrusion 213 extending from the upper surface 212; a plurality of fixing piece coupling holes 214 provided at equal intervals on the upper surface 212 around the protrusion 213; a plurality of first through-holes 215 provided in the protrusions 213 at equal intervals and penetrating to the bottom surface 211; and a ball bearing seating rail 216 formed in the form of a guide rail recessed inward along the circumference of the outer circumferential surface of the upper surface 212 .

The intermediate member 220 is manufactured to have the same diameter as the outer circumferential diameter of the socket base member 210 , and a second through hole 223 through which the protrusion 213 is closely inserted is provided.

The socket function member 240, the bottom surface is fixed to the upper surface of the intermediate member 220, the inner circumferential diameter of the main body recessed space that is recessed inward from the gearbox engaging surface 11 of the main body portion 12 and a cylindrical protrusion 242 having the same outer circumferential diameter as

and a socket coupler 250 protruding from the center of the upper surface of the cylindrical protrusion 242 of the socket function member 240 .

At this time, the socket coupler 250 is physically coupled with the shaft coupler 15 mounted on the motor rotation shaft 13 of the electric motor as the tubular protrusion 242 is closely inserted into the body recessed space, and , is coupled to the motor rotation shaft 13 and the gear input shaft of the gear box 20 and dynamically.

In addition, the coupling adapter may include: a first cylindrical member (110) that is fixedly installed on the gearbox coupling surface (11) and extends in the front longitudinal direction from the gearbox coupling surface (11) to provide an inner recessed space; and a second tubular member 120 having a cavity having an inner circumferential diameter equal to the diameter of the circumferential outer circumferential surface so as to be slidably coupled to the circumferential outer circumferential surface of the first tubular member 110 . The coupling adapter is provided as a cylindrical member that covers the gearbox coupling surface 11 of the body portion 12, and has an inner peripheral cavity into which the coupling socket can be closely inserted.

The inner circumferential surface of the first cylindrical member 110 has the same diameter as the outer circumferential surface of the coupling socket, so that when the coupling socket is inserted and coupled to the coupling adapter, at least a portion of the socket base member 210 is It is inserted into the inner recessed space of the first cylindrical member (110). In addition, a through hole 111 through which the socket function member 240 can be inserted is formed in the center of the upper surface 112 of the first tubular member 110, and the outer circumferential side of the first tubular member 110 ( In 113), a plurality of seating holes in which the ball bearing 130 can be seated are provided at equal intervals.

At the front end of the first cylindrical member 110 , a first curved portion 114 extending from the outer circumferential side surface 113 direction and bending toward the rear end direction is provided, and the rear end of the second cylindrical member 120 has an outer circumferential side surface A second curved portion 124 extending in the direction and bent toward the shearing direction is provided.

When the second tubular member 120 is slidably coupled to the first tubular member 114, an elastic body installed in the circumferential space between the second curved part 124 and the first curved part 114; Included.

Accordingly, in a state in which the coupling socket is inserted and coupled to the coupling adapter, and the socket coupler 250 is physically coupled with the shaft coupler 15 mounted on the motor rotation shaft 13 of the electric motor, When the second curved portion 124 of the second tubular member 120 is slid in a direction close to the first curved portion 114 of the first tubular member 110, the first tubular member ( The ball bearing 130 installed on the outer circumferential side surface 113 of the 110 is seated on the ball bearing mounting rail 216 of the socket base member 210, whereby a fixed coupling between the coupling socket and the coupling adapter is made.

Conversely, when sliding the second curved portion 124 of the second tubular member 120 in a direction away from the first curved portion 114 of the first tubular member 110, the coupling as described above is released, and the gearbox can be replaced accordingly.

Although the above has been described with reference to the embodiments of the present invention, those of ordinary skill in the art can variously modify the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. And it will be readily understood that it can be changed.

Claims (8)

As a gearbox replacement type electric torque wrench,
The body portion 12 in which the electric motor and the motor driver are mounted in the inner accommodation space; A body casing 10 including; a handle portion 14 extending downwardly of the body portion; and
A gearbox 20 that is dynamically coupled with the motor rotation shaft 13 of the electric motor at the front of the main body 12 and transmits the output to the tightening member by increasing or decreasing the output according to the driving of the electric motor;
a coupling adapter installed on the gearbox coupling surface 11 in front of the main body 12; A coupling socket fixedly installed on the main body coupling surface 21 of the rear of the gearbox 20 and detachably coupled to the coupling adapter includes an adapter socket comprising;
The coupling adapter is
It is provided as a cylindrical member that covers the gearbox coupling surface 11 of the main body 12, and has an inner peripheral cavity into which the coupling socket can be closely inserted,
a first cylindrical member 110 extending in the front longitudinal direction from the gearbox coupling surface 11 so as to provide an inner recessed space; and a second tubular member 120 having a cavity having an inner circumferential diameter equal to the diameter of the circumferential outer circumferential surface so as to be slidably coupled to the circumferential outer circumferential surface of the first tubular member 110;
The coupling socket is
a socket base member 210 for face-to-face coupling with the main body coupling surface 21 of the gearbox 20; a socket function member 240 installed on the socket base member 210; an intermediate intermediary member 220 that mediates coupling between the socket base member 210 and the socket function member 240 in the middle; It is seated on the upper portion of the intermediate member 220, and includes an intermediate insertion member 230 that is closely inserted into the inner receiving space of the socket function member 240,
The socket base member 210 includes a protrusion 213 extending from the upper surface 212 ; a plurality of fixing piece coupling holes 214 provided at equal intervals on the upper surface 212 around the protrusion 213; a plurality of first through-holes 215 provided in the protrusions 213 at equal intervals and penetrating to the bottom surface 211; Includes; ball bearing seating rail 216 formed in the form of a guide rail recessed inward along the circumference of the outer peripheral surface of the upper surface 212;
The intermediate member 220 is manufactured to have the same diameter as the outer circumferential diameter of the socket base member 210, and a second through hole 223 through which the protrusion 213 is closely inserted is provided,
The socket function member 240, the bottom surface is fixed to the upper surface of the intermediate member 220, the inner circumferential diameter of the main body recessed space that is recessed inward from the gearbox engaging surface 11 of the main body portion 12 Replaceable electric torque wrench, characterized in that it comprises a cylindrical projection (242) having the same outer peripheral diameter as.
delete delete delete The method of claim 1,
and a socket coupler 250 protruding from the center of the upper surface of the tubular protrusion 242 of the socket function member 240,
The socket coupler 250 is physically coupled to the shaft coupler 15 mounted on the motor rotating shaft 13 of the electric motor as the cylindrical protrusion 242 is closely inserted into the body recessed space, and the A replaceable electric torque wrench, characterized in that it is dynamically coupled to the motor rotating shaft (13) and the gear input shaft of the gearbox (20).
6. The method of claim 5,
The inner circumferential surface of the first cylindrical member 110 has the same diameter as the outer circumferential surface of the coupling socket, so that when the coupling socket is inserted and coupled to the coupling adapter, at least a portion of the socket base member 210 is It is inserted into the inner recessed space of the first cylindrical member 110,
A through hole 111 through which the socket function member 240 can be inserted is formed in the central portion of the upper surface 112 of the first cylindrical member 110,
A replaceable electric torque wrench, characterized in that a plurality of seating holes in which the ball bearing 130 can be seated are provided at equal intervals on the outer circumferential side surface 113 of the first cylindrical member 110 .
7. The method of claim 6,
At the front end of the first tubular member 110, a first curved portion 114 extending in the direction of the outer circumferential side surface 113 and bending toward the rear end direction is provided,
At the rear end of the second cylindrical member 120, a second curved portion 124 extending from the outer circumferential side direction and bent toward the front end direction is provided,
When the second tubular member 120 is slidingly coupled to the first tubular member 110, an elastic body installed in the circumferential space between the second curved part 124 and the first curved part 114; Including, replaceable electric torque wrench.
8. The method of claim 7,
In a state in which the coupling socket is inserted and coupled to the coupling adapter, and the socket coupler 250 is physically coupled with the shaft coupler 15 mounted on the motor rotation shaft 13 of the electric motor,
When the second curved portion 124 of the second tubular member 120 is slid in a direction close to the first curved portion 114 of the first tubular member 110,
The ball bearing 130 installed on the outer circumferential side surface 113 of the first cylindrical member 110 is seated on the ball bearing mounting rail 216 of the socket base member 210, so that the coupling socket and the coupling adapter Replaceable electric torque wrench, characterized in that the fixed coupling between the.

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