KR101758210B1

KR101758210B1 - Pressing drive apparatus

Info

Publication number: KR101758210B1
Application number: KR1020160014034A
Authority: KR
Inventors: 최승선
Original assignee: 주식회사 나우테크
Priority date: 2016-02-04
Filing date: 2016-02-04
Publication date: 2017-07-14

Abstract

The present invention relates to a direct drive type pressure drive apparatus for switching a rotational force of a drive motor to a forward and a backward sliding linear motion of a pressing rod to forward and reverse a pressing object, In particular by modularizing the second body to function as the outer housing of the bearing assembly, facilitating the assembly and disassembly of the direct drive type pressure drive device, making the second body of steel material, To a direct drive type pressure drive device capable of preventing thermal expansion or deformation of the housing.

Description

[0001] PRESSING DRIVE APPARATUS [0002]

In various mechanical devices, a pressure drive device for advancing and pressing a specific part to a certain point is used.

For example, in the case of a spot welder in which a current is flowed while compressing a material to be welded by using two electrodes, and the metal is melted and bonded to the resistance heat generated at this time, one of the two electrodes is connected to the pressure- And the movable electrode is configured to move back and forth using the rotational force of the motor.

More specifically, in the Japanese Patent Registration No. 10-0631261 (hereinafter referred to as " prior art "), there is disclosed a ball screw comprising a screw shaft connected to an output shaft of a motor and rotated in both directions, A pressure axis driving apparatus using a mechanism is disclosed.

In the prior art, the ball nut is coupled so as not to be rotated by the bearing slidingly coupled to the housing. When the screw shaft is rotated by the motor, the ball nut is moved forward and backward along the screw shaft, So that the pressing shaft assembled to the pressing shaft moves forward or backward.

However, in the conventional art, the bearing is slidably engaged with the rail coupled to the inside of the housing, so that the vibration due to the friction between the bearing and the rail is transmitted to the pressing shaft by the ball nut, The pressurized movement is interfered.

In addition, when abrasion occurs between the bearing and the rail, the vibration of the ball nut becomes larger, so that the linear movement of the ball nut using the rotation of the screw shaft itself may not be driven, and the bearing and the rail are built in the housing There is a problem that it is inconvenient to replace or repair parts.

In addition, when the screw shaft rotates, thermal expansion or deformation of the housing tends to occur due to frictional heat generated in bearings provided between the screw shaft and the housing.

If the whole housing is made of steel having high rigidity to prevent this, the manufacturing cost is increased and it is difficult to assemble and disassemble the bearing housed in the housing.

Therefore, in the direct-coupled type pressure drive apparatus in which the rotational force of the motor is converted into a linear motion and is transmitted so as to move the various pressing objects toward one point, A need has arisen for a technique for preventing thermal expansion or deformation of the housing which is caused by the pressing force of the pressing body and for making the linear motion of the pressing body more accurately and stably.

Accordingly, the present invention has been made to solve the above-mentioned problems,

The housing is composed of three bodies so as to prevent thermal expansion or deformation of the housing that surrounds the rotating housing due to frictional heat generated when the rotating member of the driving force transmitting means built in the housing rotates, And a second body made of a material is modularized into a bearing assembly together with a bearing member.

Further, according to the present invention, the pressing rod to which the pressing object is connected so as to ensure the linear movement of the pressing object can be linearly moved accurately without rotating by the motor, so that the pressing object can be driven to the correct point without vibration or fluctuation A guiding protrusion connected to one side of the housing and having a guide hole, a moving member coupled to the outer periphery of the pressing rod, and a guide member for guiding the front and rear sliding linear movement of the pressing rod while suppressing rotation of the pressing rod, And a guide rod fixedly coupled to the moving member and having a rear end slidably coupled to the guide hole.

In order to prevent abrasion due to friction between the pressing rod and the guide rod and the housing while the sliding motion of the pressing rod and the guide rod is performed more smoothly in the back and forth direction, the oilless bush for reducing frictional force, And it is an object of the present invention to provide a direct drive type pressure drive device provided in a guide hole.

In addition, the present invention modularizes various parts of the direct-coupled type pressure drive device to facilitate the replacement and repair of parts, and in particular, the housing has three bodies so as to facilitate assembly and disassembly of the housing,

The bearing member can be easily fitted to the housing and the bearing member can be engaged and coupled using the step of the second and third bodies so that the lubricant can be prevented from leaking from the bearing member, And the first and second oil sealing members are engaged with the step portions while being fitted into the bearing assembly while forming the bearing assembly of the first and second oil seal members.

According to an aspect of the present invention, there is provided a direct drive type pressure driver,

A housing having a rear end coupled to a driving motor;

A pressing rod to which a pressing object is connected to a front end portion and which is coupled so as to be able to linearly move back and forth in the housing;

A driving force transmitting means built in the housing for converting the rotational force of the driving motor into a rectilinear linear motion of the pressing rod forward and backward to cause the pressing object to move forward and backward; And

And guide means for guiding the forward and backward sliding linear movement of the pressing rod while suppressing rotation of the pressing rod,

The housing includes:

A first body having a through hole and a first mounting portion formed to pass through in a front and rear direction, a second body having a second mounting portion penetrating back and forth, and a third body having a third mounting portion penetratingly formed,

The driving force transmitting means is mounted in a space formed by the first to third mounting portions while the pressing rod is inserted into the drawing hole,

And the rotary member, the locking member, the bearing member, and the second body of the driving force transmitting means are formed as a single bearing assembly and modularized.

In the direct coupled type pressure drive apparatus according to the present invention,

The guide means

A guide protrusion protruding from one side of the front end of the housing and formed integrally with the guide protrusion,

A moving member coupled to an outer periphery of the exposed portion of the pressing rod,

And a guide rod having a front end fixedly coupled to the moving member and a rear end slidingly coupled through the guide hole,

And the guide hole of the housing,

And an oil-less bush for reducing the frictional force for sliding movement of the pressing rod and the guide rod back and forth.

Further, in the direct coupled type pressure drive apparatus according to the present invention,

The driving force transmitting means includes:

A connecting member fixedly coupled to the rotating shaft of the driving motor,

A head part protruding from the center of the front surface of the body part and having a fitting hole and a tube part formed along the periphery of the head part and forming a fitting part between the head part, The rotating member,

A bearing member that supports the rotating member,

A locking member coupled to the rotatable member and adapted to fix the bearing member to an outer circumferential surface of the rotatable member,

A first oil sealing member and a second oil sealing member provided between the housing and the locking member and between the housing and the body to prevent leakage of the lubricating oil from the bearing member,

A screw rod installed in the hollow portion of the pressing rod and having a rear end inserted into the fitting hole and fixedly coupled to the pressing rod,

And a ball screw which is engaged with the hollow portion of the pressing rod while being screwed to the screw portion and presses the pressing rod while moving forward and backward in accordance with the rotation of the screw rod to forcibly move the pressing rod in the longitudinal direction .

In addition, in the direct coupled type pressure drive apparatus according to the present invention,

Wherein the second body and the third body each include a step portion protruding from the inner peripheral surface of the mounting portion,

Wherein the bearing member is fitted in a space between the stepped portions of the second and third bodies and the body portion of the locking member and the rotary member,

The first oil sealing member is engaged with the step portion of the second body while being fitted in the space between the second body and the locking member,

And the second oil sealing member is interposed between the third body and the body of the rotary member so as to be engaged with the step of the third body.

In particular, the housing is composed of three bodies to facilitate assembly and disassembly. The second body and the rotary member are used as a housing in which the bearing member is mounted, It is possible to easily mount and separate the bearing member. In particular, it is possible to prevent the thermal expansion or deformation of the housing from being generated due to the frictional heat generated by the rotation of the second body made of steel,

Since the sliding movement of the pressing rod is stably ensured while the rotation of the pressing rod is restrained by introducing the guiding means including the moving member coupled to the outer periphery of the pressing rod and the guide rod slidably engaged with the outer side of the housing, To the correct point,

An oilless bush is provided in the lead-out hole and the guide hole of the housing to reduce the friction between the pressing rod and the guide rod, thereby preventing wear due to back and forth sliding movement,

The lubricating oil of the bearing member can be prevented from leaking to the outside through the structure in which the oil sealing member is fitted to the front and rear ends of the modularized bearing assembly and is engaged with the step portion of the body.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 are cross-sectional views each showing an operating state of a direct coupled type pressure drive apparatus according to the present invention;
FIG. 3 is a cross-sectional view showing the configuration of FIG. 1 and FIG. 2 separated; FIG.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the digits of the tens and the digits of the digits, the digits of the digits, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

In describing the direct coupled type pressure drive device according to the present invention, when it is specified for the sake of convenience that the rough direction reference is made with reference to Figs. 1 and 2, the direction in which the movable member 41 is provided is forward And the direction of gravity acting downward is set as it is, and directions are specified according to this standard unless otherwise specified in the description and claims of the invention relating to other drawings.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a direct coupled type pressure drive apparatus according to the present invention will be described with reference to the accompanying drawings.

The direct coupled type pressure drive apparatus according to the present invention uses a drive motor (M) for moving the pressurized object forward and pressurized to an accurate point, like an electrode of a spot welder,

A housing 10 in which a driving motor M is coupled to a rear end of the housing 10 and a pressing member (not shown) is connected to a front end of the housing 10, A pressing rod 20 built in the housing 10 and adapted to convert the rotational force of the driving motor M into linear motion of forward and backward slings of the pressing rod 20, And guiding means 40 for guiding the forward and backward sliding linear motion of the pressing rod 20 while suppressing the rotation of the pressing rod 20.

In the present invention, the pressing object can be made of various components according to the type and purpose of the facility in which the direct pressing type driving apparatus is installed, and is not limited to the moving electrode of the spot welding machine described in the above-mentioned prior art.

The driving motor M is coupled to the rear end of the housing 10 so that the rotating shaft 1 is inserted into the housing 10.

The housing 10 includes an inner mounting portion in which a pressing rod 20 and a driving force transmitting means 30 are embedded. In particular, the housing 10 of the present invention is constructed by assembling three bodies.

The first body 11 is formed with a lead-out hole 11A and a first mounting portion 11S through which the first mounting portion 11S is provided. The inner circumferential surface of the first mounting portion 11S is provided with a concave mounting groove portion 11b, Is inserted into the mounting groove portion 11b.

The first body 11 is integrally formed with a guide protrusion 11B protruding from one side of the front end of the first body 11. A guide hole 11a is formed in the guide protrusion 11B in the forward and backward directions, Is inserted through the guide hole (11a) and is slidingly engaged.

The second body 14 has a second mounting portion 14S communicating with the first mounting portion 11S and has a flange portion 14A protruding outward at the rear end side of the outer circumferential surface, Is disposed and coupled between the first body 11 and the third body 15.

The third body 15 has a third mounting portion 15S communicating with the second mounting portion 14S through which the driving motor M is coupled to the rear end of the third body 15, Is inserted into the third mounting portion 15S.

The first through third bodies 11 through 14 pass through the first body 11 and the flange portion 14A and the third body 15 of the second body 14, And a driving force transmitting means 30 is incorporated in the first to third mounting portions 11S, 14S and 15S while the pressing rod 20 is coupled to the drawing hole 11A through the through hole 11A.

The rotating shaft 1 of the driving motor M and the connecting member 31 engaged with the rotating shaft 1 are accommodated in the third mounting portion 15S of the third body 15 and the housing 10 and the driving motor The coupling member 31 is coupled to the rotary member 32 so that the coupling member 31 can be disengaged from the rotary shaft 1 in order to extract the driving motor M from the housing 10, Should be preceded.

However, since the connecting member 31 is accommodated in the third mounting portion 15S of the third body 15, the bolts of the housing 10 and the driving motor M are released, 31) can not be inserted.

The third body 15 includes a tool insertion hole (not shown) formed in a lateral direction so as to insert a tool toward the bolt of the connecting member 31 inside the third body 15 using a tool insertion hole .

The tool insertion hole functions not only to insert the tool but also to visually check the connecting member 31 inside the third body 15 from the outside, and a separate tool insertion hole It is also possible that the light transmitting window is further coupled onto the tool insertion hole of the third body 15.

The first and third bodies 11 and 15 are made of aluminum and the second body 14 is made of steel so that the second body 14 is fixed to the outer housing of the bearing member 33, Which is used as a part of the bearing assembly, and a detailed description thereof will be described later.

The pressing rod 20 is inserted into the drawing hole 11A and is linearly moved back and forth by a ball screw 37,

A hollow portion 21 is formed to penetrate forward and backward and a hook 23 is provided on the inner peripheral surface of the rear end side of the hollow portion 21 so as to be inserted into the rear end of the hollow portion 21, The ball screw 37 is engaged with the hollow portion 21 of the pressing rod 20 by a mounting member (not shown)

The pressing rod 20 is moved forward while the ball screw 37 is advanced and the pressing rod 20 is moved back by pushing the mounting member while the ball screw 37 is being retracted.

The pressing rod 20 is configured such that the pressing object is directly connected to the exposed portion 22 exposed to the outside of the housing 10 or the pressing object is connected to the moving member 41 coupled to the exposed portion 22, Let the object back and forth.

When the ball screw 37 fixedly coupled to the pressing rod 20 by the pressing rod 20 and more precisely the mounting member is rotated together with the screw rod 36, the pressing rod 20 is moved forward and backward It is possible to solve the above-mentioned problem by means of the guide means 40, and to prevent occurrence of vibration and shaking due to forward and backward movement of the pressing rod 20 and occurrence of abrasion of parts.

This guide means 40

A guide protrusion 11B protruding from one side of the front end of the housing 10 and integrally formed with the guide hole 11a formed in the forward and backward directions,

A moving member 41 coupled to the outer periphery of the exposed portion 22 of the pressing rod 20,

And a guide rod 42 having a front end fixedly coupled to the moving member 41 and a rear end slidingly coupled through the guide hole 11a.

The moving member 41 is provided with a connecting portion 41a to which a pressing object is mounted or connected at the front end thereof and an engaging groove portion 41b to which the exposed portion 22 of the pressing rod 20 is inserted, But the detailed configuration of the connecting portion 41a and the engaging groove 41b may be omitted or variously modified if the pressing object is directly mounted or connected to the pressing rod 20 instead of the moving member 41. [ .

The moving member 41 includes a connection arm protruding in parallel with the guide protrusion 11B, and the guide rod 42 is fixedly coupled to the connection arm 41

The guide rod 42 has a predetermined length in the forward and rearward directions corresponding to the forward and backward distances of the pressing rod 20 and has a front end fixedly coupled to the connecting arm of the moving member 41, And is slidably coupled,

The pressing rod 20 and the ball screw 37 rotate together with the rotating shaft 1 due to the engagement structure of the guide rod 42 and the guide hole 11a when the rotating shaft 1 of the motor rotates The guide rod 42 is moved forward and backward in the guide hole 11a by the moving member 41 so that the front and rear sliding linear movement of the pressing rod 20 is performed Guide.

A stopper (not shown) may be additionally provided at the rear end of the guide rod 42 for limiting the advance distance of the pressing rod 20 and the backward distance restriction of the pressing rod 20 may be limited by the moving member 41 And is realized by the contact of the guide protrusion 11B.

According to the present invention, it is possible to simplify the internal structure of the direct drive type pressure drive device, to easily assemble or replace the guide means 40, Only the member 41 can be used interchangeably, and there is an advantage that the direct-coupled type pressure drive apparatus according to the present invention can be applied to various facilities.

In this case, since the pressing rod 20 and the guide rod 42 are brought into contact with the lead-out hole 11A and the guide hole 11a, wear due to friction may occur. To prevent this, And the guide holes 11a are provided with cylindrical oil-less bushes 12 and 13, respectively, to reduce the frictional force between the members.

The oilless bushes 12 and 13 are formed by porosity of the cast iron by repeating the heating and cooling of the cast iron. The oilless bushes 12 and 13 contain the oil therein, It is possible to form a film and reduce the friction of the members.

The oilless bushes 12 and 13 guide the forward and backward linear motion of the pressing rod 20 and the guide rod 42 in the axial direction to be smoothly slid so as to allow the pressing object to move forward and to the correct point So that sliding of the pressing rod 20 and the guide rod 42 is suppressed when the pressing rod 20 and the guide rod 42 are forced to perform a linear movement out of the axial direction.

More specifically, the driving force transmitting means 30,

The driving force transmitting means (30)

A connecting member 31 fixedly coupled to the rotating shaft 1 of the driving motor M,

A head part 32B protruding from the center of the front surface of the body part 32A and having a fitting hole 32a; 32B formed integrally with the head portion 32B and a tubular portion 32C formed along the periphery of the head portion 32B and forming the fitting portion 32c between the rotary member 32,

A bearing member 33 for bearing the rotary member 32,

A locking member 34 coupled to the front surface of the rotary member 32 to fix the bearing member 33 to the outer circumferential surface of the rotary member 32,

A first oil sealing member 32 provided between the housing 10 and the locking member 34 and between the housing 10 and the body 32A to prevent leakage of the lubricating oil from the bearing member 33, (35A) and the second oil sealing member (35B)

A screw rod 36 having a screw portion 36a formed in the outer periphery of the pressing rod 20 and inserted in the fitting hole 32a while being inserted into the hollow portion 21 of the pressing rod 20, And

And is engaged with the hollow portion 21 of the pressing rod 20 while being screwed to the screw portion 36a so that the pressing rod 20 is pressed while moving forward and backward in accordance with the rotation of the screw rod 36 And a ball screw 37 for forcing the forward and backward sliding linear movement of the pressing rod 20.

When the rotary shaft 1 rotates in both directions, the rotational force of the driving motor M is transmitted to the screw rod 36 to rotate together with the driving force transmission means 30, and the screw portion 36a of the screw rod 36 The rotation of the screw rod 37 is restricted by the pressing rod 20 connected to the guide means 40 so that the ball screw 37 is moved forward and backward relative to the rotation of the screw rod 36 in both directions, The rod 20 is pressed so that the pressing object connected to the pressing rod 20 moves back and forth.

The connecting member 31 is fixedly coupled to the outer periphery of the rotating shaft 1 disposed on the third mounting portion 15S and is connected to the front end of the rotating rod 32, 36).

The connecting member 31 includes a body (not shown) having a 'C' shape formed in the circumferential direction of the rotating shaft 1 and having one side opened to surround the rotating shaft 1 and a rotating shaft 1 And a rotating plate (not shown) coupled to the front surface of the body so as to be pressed to increase the fixing force of the body.

In order to increase the coupling force between the rotating shaft 1 and the connecting member 31, the rotating shaft 1 has a notch or a laterally penetrating engaging hole formed on one side surface thereof, 31 may be laterally coupled to the notches or engagement holes.

The rotating member 32 is disposed on the second mounting portion 14S of the second body 14 and connected to the connecting member 31 to transmit the rotational force of the motor to the screw rod 36, The coupling member 31 is coupled (male-female coupling or bolt coupling) to the rear surface of the body portion 32A,

(Not shown) of the screw rod 36 is inserted into the fitting hole 32a formed in the front and rear of the head portion 32B so that the fixing member (not shown) is coupled to the fastening portion and the rotating member 32 and the screw rod 36 are connected.

The tubular portion 32C is longer than the projecting height of the head portion 32B so that the fitting portion 32c is formed between the tubular portion 32C and the head portion 32B. The rear end portion of the pressing rod 20 is fitted to extend the forward and backward movement path of the pressing rod 20, thereby guiding and assuring stable forward and backward movement of the pressing rod 20.

A bearing member 33 contacts the outer peripheral surface of the tubular portion 32C and slidably supports the rotation of the rotary member 32. Ball bearing is used for the bearing member 33. [

The first oil seal member 35A is coupled to the front end of the bearing member 33 and the second oil seal member 35B is coupled to the front end of the bearing member 33. In this case, And is coupled to the rear end of the bearing member 33 to prevent the lubricating oil from leaking to the outside.

At this time, when the bearing member 33 and the first and second oil sealing members 35A and 34B are fixed to the second mounting portion 14S of the second body 14 with bolts or the like, the structure for bolt connection is complicated The locking member 34 is screwed to the outer peripheral surface of the front end of the head portion 32B so that the locking member 34 is interposed between the locking member 34 and the body portion 32A The bearing member 33 is fixed,

The first and second oil seal members 35A and 35B are engaged while being sandwiched between the second body 14 and the locking member 34 and between the third body 15 and the body portion 32A.

The first and second oil sealing members 35A and 35B are provided with an outer wall portion 35a contacting the inner circumferential surface of the mounting portion 14S of the body 15S so as to ensure watertightness between the members, An inner wall portion 35b abutting the outer peripheral surface of the locking member 34 and the outer peripheral surface of the body portion 32A and a connecting portion connecting the outer wall portion 35a and one end portion of the inner wall portion 35b So that an elastic force is generated in a direction in which the outer side wall portion 35a and the inner side wall portion 35b are opened.

The first and second oil sealing members 35A and 35B of the above-described configuration are formed in such a manner that the opened surface (the rear surface of the first oil sealing member 35A and the front surface of the second oil sealing member 35B) In the space between the second body 14 and the head portion 32B and between the third body 15 and the body portion 32A so as to face the second body 14 and the body portion 32A.

Therefore, the elastic force generated in the direction in which the outer side wall portion 35a and the inner side wall portion 35b are inserted between the members ensures watertightness between the members, and the first and second oil sealing members 35A 35B.

The second body 14 and the third body 15 include stepped portions 14a and 15a protruding from the inner circumferential surfaces of the first and second mounting portions 14S and 15S,

The bearing member 33 is disposed between the step portions 14a and 15a of the second and third bodies 14 and 15 and the body portion 32A of the locking member 34 and the rotary member 32. [ ), Which is inserted into the space

The rotating member 32, the locking member 34, the bearing member 33 and the second body 14 form a single bearing assembly,

The first oil sealing member 35A is engaged with the step portion 14a of the second body 14 while being fitted in the space between the second body 14 and the locking member 34,

The second oil sealing member 35B is caught between the third body 15 and the body portion 32A of the rotary member 32 so as to be engaged with the step portion 15a of the third body 15, do.

The bearing assembly in which the second body 14 and the rotary member 32 function as the outer housing and the inner housing of the bearing member 33, respectively, using the stepped portions 14a, 15a and the locking member 34, Assembled with only the engagement of the second and third bodies 14 and 15 without using the second and third bodies 14 and 15, facilitating assembly and disassembly through modularization of the parts.

That is, one bearing assembly modularized with the rotary member 32, the locking member 34, the bearing member 33 and the second body 14 is coupled to the third body 15, and the first and second oil The first and second oil sealing members 35A and 35B can be easily fixed to the bearing member 33 and the fitting portion 32c while being easily assembled and disassembled without using bolts. It is possible to ensure the watertightness of the valve body 35B.

When the housing 10 is constructed of three bodies and the second body modularized by the bearing assembly is made of steel, the housing 10, due to the frictional heat of the bearing member 33, It is possible to prevent the thermal expansion or deformation of the semiconductor device.

The screw rod 36 is fixedly coupled to the fitting hole 32a of the rotary member 32 through the through hole 11A and rotates in both directions during operation of the motor.

The engagement of the fastening portion of the screw rod 36 and the rotary member 32 is performed by a fixing member (not shown) with a mounting hole formed to the fitting hole 32a of the head portion 32B with the rear surface of the body portion 32A opened And the fastening portion and the fastening member are engaged with each other by a toothed portion and the fastening portion and the head portion 32B are engaged with each other. So that the rotary member 32 and the screw rod 36 are coupled to each other.

Further, the fixing member and the fastening portion can be additionally coupled through bolts which are laterally coupled perpendicular to the longitudinal direction of the screw rod 36.

The ball screw 37 is screwed to a screw portion 36a of the screw rod 36 by a ball (not shown) rolling in a screw groove (not shown) formed on the inner circumferential surface.

The ball screw 37 is key-engaged with the pressing rod 20 through a key groove (not shown) formed in a lateral direction. Due to the pressing rod 20 which is not rotated by the guide means 40, Rotation of the ball screw 37 is suppressed,

Therefore, when the screw rod 36 rotates, the ball screw 37 whose rotation is suppressed by the rolling motion of the ball advances or reverses in accordance with the rotation direction of the screw rod 36 to press the pressing rod 20 The front and rear sliding linear movement of the pressing rod 20 is performed.

The present invention minimizes the swaying motion of the pressing rod (20) causing the pressing object to move back and forth through the driving force transmitting means (30) and the guiding means (40) The movement is limited to one point, whereby the improved pressing force is concentrated on the correct point, so that the machining defects using the direct pressing type pressure drive device can be minimized, and the effect of easy assembly and disassembly of the direct type pressing drive device and improved durability have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Substitutions should be construed as falling within the scope of protection of the present invention.

M: drive motor 1: rotary shaft
10: housing 11, 14, 15: body
11S, 14S, 15S: mounting portion 11A: drawing hole
11B: guide protrusion 11a: guide hole
11b: mounting groove 12, 13: oilless bush
14A: flange portion 14a, 15a:
20: pressing rod 21: hollow portion
22: Exposure section 23:
30: driving force transmitting means 31: connecting member
32: rotating member 32A:
32B: head portion 32C:
32a: Fitting hole 32c: Fitting portion
33: bearing member 34: locking member
35A, 35B: oil sealing member 35a: outer wall portion
35b: inner side wall portion 36: screw rod
36a: screw portion 37: ball screw
40: guide means 41: moving member
42: guide rod

Claims

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A housing having a rear end coupled to a driving motor;
A pressing rod to which a pressing object is connected to a front end portion and which is coupled so as to be able to linearly move back and forth in the housing;
A driving force transmitting means built in the housing for converting the rotational force of the driving motor into a rectilinear linear motion of the pressing rod forward and backward to cause the pressing object to move forward and backward; And
And guide means for guiding the forward and backward sliding linear movement of the pressing rod while suppressing rotation of the pressing rod,
The housing includes:
A first body having a through hole and a first mounting portion formed to pass through in a front and rear direction, a second body having a second mounting portion penetrating forward and backward, and a third body having a third mounting portion formed therethrough,
The driving force transmitting means is mounted in a space formed by the first to third mounting portions while the pressing rod is inserted into the drawing hole,
The rotating member, the locking member, the bearing member, and the second body of the driving force transmitting means are modularized by forming one bearing assembly,
The guide means
A guide protrusion protruding from one side of the front end of the housing and formed integrally with the guide protrusion,
A moving member coupled to an outer periphery of the exposed portion of the pressing rod,
And a guide rod having a front end fixedly coupled to the moving member and a rear end slidingly coupled through the guide hole,
And the guide hole of the housing,
And an oil-less bush for reducing the frictional force for sliding movement of the pressing rod and the guide rod forward and backward.

A housing having a rear end coupled to a driving motor;
A pressing rod to which a pressing object is connected to a front end portion and which is coupled so as to be able to linearly move back and forth in the housing;
A driving force transmitting means built in the housing for converting the rotational force of the driving motor into a rectilinear linear motion of the pressing rod forward and backward to cause the pressing object to move forward and backward; And
And guide means for guiding the forward and backward sliding linear movement of the pressing rod while suppressing rotation of the pressing rod,
The housing includes:
A first body having a through hole and a first mounting portion formed to pass through in a front and rear direction, a second body having a second mounting portion penetrating back and forth, and a third body having a third mounting portion penetratingly formed,
The driving force transmitting means is mounted in a space formed by the first to third mounting portions while the pressing rod is inserted into the drawing hole,
The rotating member, the locking member, the bearing member, and the second body of the driving force transmitting means are modularized by forming one bearing assembly,
The driving force transmitting means includes:
A connecting member fixedly coupled to the rotating shaft of the driving motor,
A head part protruding from the center of the front surface of the body part and having a fitting hole and a tube part formed along the periphery of the head part and forming a fitting part between the head part, The rotating member,
A bearing member that supports the rotating member,
A locking member coupled to the rotatable member and adapted to fix the bearing member to an outer circumferential surface of the rotatable member,
A first oil sealing member and a second oil sealing member provided between the housing and the locking member and between the housing and the body to prevent leakage of the lubricating oil from the bearing member,
A screw rod installed in the hollow portion of the pressing rod and having a rear end inserted into the fitting hole and fixedly coupled to the pressing rod,
And a ball screw which is engaged with the hollow portion of the pressing rod while being screwed to the screw portion and presses the pressing rod while moving forward and backward in accordance with the rotation of the screw rod to forcibly move the pressing rod in the longitudinal direction Wherein the pressure-driven driving device is a direct-coupled type pressure-driven device.

A housing having a rear end coupled to a driving motor;
A pressing rod to which a pressing object is connected to a front end portion and which is coupled so as to be able to linearly move back and forth in the housing;
A driving force transmitting means built in the housing for converting the rotational force of the driving motor into a rectilinear linear motion of the pressing rod forward and backward to cause the pressing object to move forward and backward; And
And guide means for guiding the forward and backward sliding linear movement of the pressing rod while suppressing rotation of the pressing rod,
The housing includes:
A first body having a through hole and a first mounting portion formed to pass through in a front and rear direction, a second body having a second mounting portion penetrating back and forth, and a third body having a third mounting portion penetratingly formed,
The driving force transmitting means is mounted in a space formed by the first to third mounting portions while the pressing rod is inserted into the drawing hole,
The rotating member, the locking member, the bearing member, and the second body of the driving force transmitting means are modularized by forming one bearing assembly,
Wherein the second body and the third body each include a step portion protruding from the inner peripheral surface of the mounting portion,
Wherein the bearing member is fitted in a space between the stepped portions of the second and third bodies and the body portion of the locking member and the rotary member,
The first oil sealing member is engaged with the step portion of the second body while being fitted in the space between the second body and the locking member,
And the second oil sealing member is engaged with the step portion of the third body while being sandwiched between the body of the third body and the rotary member.