KR20030069680A - A high speed and low friction linear actuator a bellows type - Google Patents

Abstract

PURPOSE: A bellows-type high speed linear actuator with low friction is provided to reciprocate and move linearly at high speed by minimizing the friction area of sliding of a slide table with a responsive flexible bellows member. CONSTITUTION: A linear actuator is composed of a cylinder block(10); a bellows moving body having a piston(21) moved and fitted to a cylinder chamber(11) of the cylinder block, cushion sleeves(22) assembled against the piston and opposed to each other, and plural flexible bellows(23) combined between the cushion sleeves and the piston and fixed to the end of the cylinder chamber; a slide table(30) connecting with the piston and sliding; and both head covers(40) sealing and assembling the cylinder chamber of the cylinder block.

Description

Low friction high speed linear actuator of bellows type {A HIGH SPEED AND LOW FRICTION LINEAR ACTUATOR A BELLOWS TYPE}

The present invention relates to a linear actuator (LINEAR ACTUATOR) used in a variety of industrial machinery, more specifically a straight line by minimizing the sliding friction area of the slide table as a linear reciprocating member by using a responsive bellows elastic member The speed of movement is provided, and the inertia force of the slide table is absorbed immediately, and the brake table is smoothly damped without impact to minimize the damage of the slide table, and the adjustment and use of the buffer force according to the movement speed and weight of the slide table Of course, it relates to a double-acting bellows-type low friction high speed linear actuator that is compatible with the parallel mounting of an LM guide when necessary.

In general, factory automation transfer, transfer supply and assembly, conveying line, industrial Cartesian robot, conveying machine and lift device, automatic door and conveying device of CNC machine tool, industrial automatic door field, packing, welding, painting machine Linear actuators such as rodless cylinders and slide cylinders are used in various industrial machines such as linear motion devices.

In addition, in manufacturing ultra-precision products such as semiconductors, assembly equipment is indispensably used for assembling necessary components in each manufacturing line.

This type of assembly equipment uses various types of linear actuators for the purpose of clamping transfer, adsorption transfer, and conversion transfer of the assembly which are transported on the conveyor line. Such linear actuators are mounted on the linear reciprocating member to perform the above operation. It is used by attaching a separate jig.

The rodless cylinder known as such a conventional linear actuator has various functions and shapes depending on the range of use and its operation method.

Magnetic types, band seal types, cable types, mechanical types, and the like are known.

The linear actuator has a disadvantage in that the structure is complicated and the manufacturing cost is high, and the sliding friction area due to the reciprocating motion of the linear motion member is difficult, and thus the high speed movement is difficult. Due to the malfunction caused by the short life and the compatibility of the device was weak, there was a disadvantage that the reliability is low.

The present invention has been researched and developed to effectively solve the disadvantages of the prior art as described above,

An object of the present invention is a low-velocity bellows-type low friction that provides a high-speed linear reciprocating motion with a sliding area of the slide table, which is a linear reciprocating member connected to the center by expansion and contraction of both bellows members having good response. It is to provide a high speed linear actuator.

The object of the present invention is to minimize the overall volume and weight by simplification and condensation of components, thereby minimizing the sliding friction area of the slide table, which is a linear reciprocating member, to maximize the application efficiency and use efficiency in the assembly equipment of small precision parts. To provide a bellows type low friction high speed linear actuator.

An object of the present invention is to absorb the inertial force according to the control of the forward and backward operation of the slide table on which the jig is mounted, and at the same time to gently damp the brake table without impact, thereby minimizing damage to the slide table and thereby improving the bellows of the device. To provide a low friction high speed linear actuator of the type.

An object of the present invention is to provide a low-velocity high-speed linear actuator of the bellows type that can be used to adjust the cushioning force in accordance with the movement speed and weight of the slide table can be used in general.

An object of the present invention is to provide a bellows type low friction high speed linear actuator maximized compatibility by parallel installation of a separate L.M guide (Liner Motion Guide) according to the scope of application.

The object of the present invention is a cylinder block constituting the cylinder chamber penetrated in the longitudinal direction and a plurality of guide grooves formed on the outside in the longitudinal direction and the slot hole communicated along the cylinder chamber between the guide grooves;

A piston is inserted into the slotted hole of the cylinder block in an exposed state, and a piston which is movable in the cylinder chamber, a cushion sleeve which is cooked facing the piston center, and one side is connected between the cushion sleeve and both ends of the piston. A bellows moving body composed of a plurality of flexible bellows assembled and fixed to the other end of the cylinder chamber, respectively;

A slide table connected to the assembly protrusion of the exposed piston and assembled to slide both guide protrusions into the guide groove;

Sealing the cylinder chamber and the bellows inner chamber and protrudes a sleeve guide tube having a cushion chamber and a cushion orifice inserted into the inner chamber of the bellows, an air port communicating with the cushion chamber is formed and on the opposite side of the air port A control port through which the air volume control hole is communicated is achieved by a bellows type low friction high speed linear actuator composed of both head covers in which the cushion needle is screw-assembled through the communication with the cushion orifice.

In addition, the present invention is achieved by a bellows type low friction high speed linear actuator including a stopper for controlling the moving distance of the linear reciprocating slide table and an air buffer for stopping both ends of the slide table.

1 is an exploded perspective view of the present invention,

2 is an assembled perspective view of the present invention,

3 is a front configuration diagram of the present invention;

4 is a plan view of the present invention;

5 is a cross-sectional view taken along line IV-IV of FIG.

6 is an enlarged view of the excerpt 'F' of 5;

7 is a front sectional view of the present invention;

8 is an enlarged view of an excerpt 'G' of FIG. 7;

9 is an enlarged view of an excerpt 'H' of FIG. 8;

10 is a side view of the present invention,

11 is a side view showing another embodiment of the present invention;

12 to 15 are enlarged excerpts showing the process according to the operation of the present invention.

<Description of Symbols for Major Parts of Drawings>

10: cylinder block 20: bellows moving body

21: piston 22: cushion sleeve

23: bellows 30: slide table

40: head cover 60: air buffer

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

That is, the present invention, as shown in the accompanying drawings, Figures 1 to 10, a plurality of guide grooves (12, 12) formed in the longitudinal direction of the cylinder chamber 11 penetrated in the longitudinal direction of the outside and the guide grooves A cylinder block 10 constituting a slot hole 13 communicated along the cylinder chamber 11 between and;

A piston 21 which is fitted into the slot hole 13 of the cylinder block in an exposed state and is movable in the cylinder chamber 11, and a cushion sleeve which is assembled to face the piston. (22,22) and a plurality of flexible bellows (23, 23), one side is connected and assembled between the cushion sleeve and both sides of the piston 21, the other side is assembled and fixed to the end of the cylinder chamber 11, respectively With bellows movement body 20,

The slide table 30 connected to the assembly protrusion 21-1 of the exposed piston 21 and assembled to slide the guide protrusions 31 and 31 of the both ends into the guide grooves 12 and 12. and,

Cushion chamber 41-1 for sealing the cylinder chamber 11 and the inner chamber 23-1 of the bellows 23 and receiving the cushion sleeve 22 while being inserted into the inner chamber 23-1. On one side thereof protrudes the sleeve guide pipe 41 formed in the longitudinal direction of the cushion orifice (41-2), an air port (42) communicating with the cushion chamber (41-1) is formed and the Both head covers 40 and 40 in which the adjustment port 44 in which the air volume adjusting hole 43 communicates with each other on the opposite side are passed through the cushion orifice 41-2, and the cushion needle 45 is screw-assembled. It is composed roughly).

The slide table 30 is bolted to the assembly bolt (21-1) of the piston 21 by the fastening bolt (B), the stopper projections (32, 32) protrude on both sides of one side, but a plurality of An assembly screw hole 33 is formed.

The piston 21 and the cushion sleeves 22 and 22 of the bellows moving body 20 are assembled with the cushion sleeve 22 facing the threaded holes 21-2 formed in the piston 21, The elastic bellows (23, 23) has a projection ring 22-1 protruding from the cushion sleeve 22, the both ends of which are screwed to the piston 21, and the end is assembled to both ends of the cylinder chamber (11) Screw protrusions 24-1 of the cover 24 and each of the projection ring 25-1 protruding from the end ring 25 is fitted by fitting the outer periphery of the sleeve guide tube 41 to the inner peripheral surface Each end face of the screw is tightened and compressed between the piston 21 and the cushion sleeve 22 and between the end cover 24 and the end ring 25 so as to compress the inner chamber 23-1. ) Is assembled to the outside and airtight.

At this time, each of the cushion sleeve 22 has a valve assembly groove (22-2) is formed in the longitudinal direction of the center, the through hole communicating the valve assembly groove and the inner chamber (23-1) of the bellows (23) (22-3) is orthogonal to the valve assembly groove (22-2) and a plurality of penetrating through the vicinity of the projection ring (22-1), the check valve 50 is provided in the valve assembly groove (22-2) It is assembled and configured.

The check valve 50 includes a check plunger 51 through which an air passage 51-1 penetrates and is screw-assembled at the tip of the valve assembly groove 22-2, and a head of the check plunger and the cushion sleeve 22. And a cushion seal 52 interposed between end faces of the sleeve guide tube 41 so as to be assembled in a state of being in close contact with the inner circumference of the cushion chamber 41-1 of the sleeve guide tube 41, and the air passage 51-1. It consists of a check ball 53 for opening and closing, and a compression spring 54 for blocking the air passage 51-1 by holding the check ball.

The head cover 40 is screw-assembled with the cylinder block 11 and a plurality of fastening bolts (B) in a state surrounding the end cover 24, and on one side of the stopper protrusion 32 of the slide table 30. Correspondingly, an air shock absorber 60 is formed to form a protrusion 40-1, screwed into a threaded hole through which the protrusion 40-1 is fixed, and is fixed with a fixing nut N to buffer the stop of the slide table 30. The stopper bolt 70 is screw-assembled so as to adjust the moving section of the slide table 30 on the opposite side, and is fixed by a fixing nut N.

As shown in FIG. 11, the cylinder block 10 has a stopper protrusion of the slide table 30 provided with an LM guide 80 in the longitudinal direction on one side of the outer surface and guided by the LM guide 80. 32 and 32 are assembled between the screw thread assembly (33) and the bolt (B) can be used by connecting the slide block 81 to move in the same manner as the slide table (30).

The present invention is equipped with a separate working jig (not shown) on the slide table 30 and the normal air pressure supply means (comp) to the air port (42, 42) formed in the head cover (40, 40) of both Lesa) is connected and the compressed air is supplied to the air port 42 of the head cover 40 on one side of the slide table 30 is moved.

The compressed air thus supplied is supplied to the valve assembly groove 22-2 through the check valve 50 of the cushion sleeve 22 inserted into the cushion chamber 41-1 of the sleeve guide pipe 41 on one side. It extends while being supplied to the inner chamber 23-1 of the bellows 23 on one side in the contracted state via the 23.

As the compressed bellows 23 on one side of the contraction is expanded, the cushion sleeve 22 to which the compressed air is supplied is separated from the cushion chamber 41-1 of the sleeve guide pipe 41 on the one side, and the central piston ( 21 is moved to the other side of the head cover 40 side and the slide table 30 assembled by the assembly protrusion 21-1 and the bolt (B) of the piston 21 is both guide protrusions (31, 31) The slide guide is moved from the guide grooves 12 and 12 of the cylinder block 10 to (see FIG. 12).

The compressed air supplied to the inner chamber 23-1 of the other side of the bellows 23 is contracted by the moving piston 21 through the cushion chamber 41-1 of the other sleeve guide pipe 41. It is discharged through the air passage 42 of the other head cover 40. (See Fig. 13)

As shown in FIG. 14, the continuously moving piston 21 has the check plunger 51 of the check valve 50 assembled to the cushion sleeve 22 on its moving side inserted into the sleeve guide pipe 41. From the time point, the inner chamber 23-1 and the cushion chamber 41-1 of the bellows 23 are sealed by the cushion seal 52, so that the air of the inner chamber 23-1 shrinks. Compressed by the air 23 and the air buffer is started, the compressed air therein through the air volume control hole 43 and the air passage 42 through the cushion orifice 41-2 penetrated to one side of the sleeve guide pipe (41) While slowly discharging via the continuous air buffer as shown in FIG.

When the movement of the piston 21 is completed, when the compressed air is supplied to the air port 42 of the head cover 40 m of the moved side, the piston 21 moves to the opposite side in the same manner as described above. Done.

By repeating this operation, the slide table 30 performs work by a jig (not shown) mounted while repeatedly performing a linear reciprocating motion.

In the present invention, the cushion needle 45 screwed to the adjustment port 44 in communication with the cushion orifice 41-2 is the weight according to the weight or the moving speed of the jig mounted on the slide table 30 The gap between the air volume adjusting hole 43 communicating with the air passage 42 can be adjusted by screw movement to adjust the degree of cushioning by adjusting the air discharge rate.

In addition, the movement distance of the slide table 30 moving in the same manner as the piston 21 is possible by adjusting the advancing and stopping of the stopper bolt 70 respectively configured in the head cover 40, and the stopper bolt 70 When the movement distance is too short by the air buffer is weak, it is possible to adjust the advancing movement and the buffering force of the air shock absorber 60 configured on the opposite side of the stopper bolt 70.

In particular, the present invention is provided to minimize the sliding friction area according to the linear reciprocation of the bellows movement body 20 is provided with a high speed movement.

Therefore, when the weight of the jig (not shown) mounted on the slide table 30 or the goods moved by the jig is large according to the working range, the excessive impact on the slide table 30 is effectively buffered to minimize damage. In order to minimize the life extension and malfunction caused by the external air buffer 60 can be used in parallel.

In addition, the cylinder block 10 and the slide table 30 can be used by assembling separate L.M guide 80 and the slide block 81 when necessary, thereby providing universal use of the device.

As described in detail above, the present invention is a high speed movement without malfunction even in a simple configuration, the sliding friction surface according to the movement of the piston and the slide table in a linear reciprocating motion is minimized to provide a life extension according to the high speed movement According to the effect and the applied equipment, the general purpose of the apparatus is widely used, and the manufacturing cost by the simple configuration is low, and the reliability of the apparatus is achieved.

Claims (6)

A plurality of guide grooves 12 and 12 formed on the outer side in the longitudinal direction of the cylinder chamber 11 penetrated in the longitudinal direction, and a slot hole 13 communicated along the cylinder chamber 11 between the guide grooves. Cylinder block 10 and the configuration, A piston 21 which is fitted into the slot hole 13 of the cylinder block in an exposed state and is movable in the cylinder chamber 11, and a cushion sleeve which is assembled to face the piston. (22,22) and a plurality of flexible bellows (23, 23), one side is connected and assembled between the cushion sleeve and both sides of the piston 21, the other side is assembled and fixed to the end of the cylinder chamber 11, respectively With bellows movement body 20, The slide table 30 connected to the assembly protrusion 21-1 of the exposed piston 21 and assembled to slide the guide protrusions 31 and 31 of the both ends into the guide grooves 12 and 12. and, Cushion chamber 41-1 for sealing the cylinder chamber 11 and the inner chamber 23-1 of the bellows 23 and receiving the cushion sleeve 22 while being inserted into the inner chamber 23-1. On one side thereof protrudes the sleeve guide pipe 41 formed in the longitudinal direction of the cushion orifice (41-2), an air port (42) communicating with the cushion chamber (41-1) is formed and the Both head covers 40 and 40 in which the adjustment port 44 in which the air volume adjusting hole 43 communicates with each other on the opposite side are passed through the cushion orifice 41-2, and the cushion needle 45 is screw-assembled. Low friction high speed linear actuator of the bellows type. The method of claim 1, The piston 21 and the cushion sleeves 22 and 22 of the bellows moving body 20 are assembled with the cushion sleeve 22 facing the threaded hole 21-2 formed in the piston 21. Elastic bellows (23, 23) is a projection ring (22-1) protruding from the cushion sleeve 22, both ends thereof are screwed to the piston 21, End ring 25 which is screwed into the screw hole 24-1 of the end cover 24 assembled at both ends of the cylinder chamber 11 and fitted by fitting the outer circumference of the sleeve guide tube 41 to the inner circumferential surface thereof. Each end surface of the protrusion ring 25-1 protrudes from the piston 21 and the cushion sleeve 22 and between the end cover 24 and the end ring 25 by screwing. A low friction high speed linear actuator of a bellows type, characterized in that the inner chamber (23-1) is squeezed in between to assemble the outer and airtight bodies. The method according to claim 1 or 2, Each of the cushion sleeves 22 has a valve assembly groove 22-2 formed in the longitudinal direction of the center thereof, and a through hole 22 communicating with the valve assembly groove and the inner chamber 23-1 of the bellows 23. -3) is orthogonal to the valve assembly groove 22-2, and passes through the vicinity of the protrusion ring 22-1, and the check valve 50 is assembled to the valve assembly groove 22-2. Bellows type low friction high speed linear actuator The method of claim 3, The check valve 50 includes a check plunger 51 through which an air passage 51-1 penetrates and is screw-assembled at the tip of the valve assembly groove 22-2, and a head of the check plunger and the cushion sleeve 22. And a cushion seal 52 interposed between end faces of the sleeve guide tube 41 so as to be assembled in a state of being in close contact with the inner circumference of the cushion chamber 41-1 of the sleeve guide tube 41, and the air passage 51-1. A bellows type low friction high speed linear actuator comprising a check ball (53) for opening and closing and a compression spring (54) for blocking the air passage (51-1) by touching the check ball. The method of claim 1, The head cover 40 is screw-assembled with the cylinder block 11 and a plurality of fastening bolts (B) in a state surrounding the end cover 24, and on one side of the stopper protrusion 32 of the slide table 30. Correspondingly, an air shock absorber 60 is installed to form a protrusion 40-1, screwed into the threaded hole, and fixed to the fixing nut N to cushion the stop of the slide table 30. Bellows type low friction high speed linear actuator, characterized in that the stopper bolt (70) is screwed to fix the moving section of the slide table (30) on the opposite side is fixed by a fixing nut (N). The method according to claim 1, 2, 5, The cylinder block 10 is installed by the LM guide 80 in the longitudinal direction on one side of the outer surface while being guided by the LM guide 80 is screwed with the slide table 30 and the bolt (B) is the slide table A bellows type low friction high speed linear actuator having a slide block 81 that moves in the same manner as the movement of the 30.