KR200297464Y1 - Motor lifte Machine - Google Patents

Abstract

The present invention relates to a motor lift device used for lifting or lowering heavy objects or performing a production operation while lifting a certain height of a mechanical device used as a production facility in an industrial field. A support formed on the bottom and fixed to the floor, a carrier installed above and below the support, and movable up and down, and both side links slidably supported by the upper and lower ends on the upper and lower surfaces of the support, respectively. A lift device comprising a main actuating link having a structure in which an intersecting center portion is rotatably coupled to a main hinge while being crossed with an "X" shape, wherein the gear is a normal gear motor installed horizontally inside the support and the support. Fixed to the output end to surround the output shaft of the main link at both sides of the main operation link An output end cover case to which one end of the main hinge which rotatably connects the center crossing in the shape of "X" is connected; A ball screw shaft directly connected to the output shaft of the geared motor by a connection case fixedly attached to the output end cover case; A ball screw nut body installed on the ball screw shaft and moving forward and backward along the ball screw shaft according to the forward and reverse rotation operations of the geared motor; Both side auxiliary links are installed in an "X" shape so as to be symmetrical with respect to the ball screw shaft, and one end of each of both links is rotatably connected to the upper and lower sides of the ball screw nut body, and the other end of each of the two auxiliary links is The upper and lower sides of the main hinge is designed to constitute an auxiliary operation link rotatably connected to each of the two main links constituting the main operation link.

Description

Motor lifte machine

The present invention relates to a motor lift device used when lifting or lowering heavy objects or when carrying out a production work in a state in which a machine used as a production facility in an industrial site is raised to a certain height.

In general, forklift trucks are often used in industrial factories and unloading stations. Forklift trucks can perform excellent functions for simply moving heavy goods, while forklift trucks can't move in narrow places or industrial sites. Forklifts are not used in places where the machinery used in the production equipment is lifted to a certain height and the production work is carried out for a long time.

Therefore, the lift device is used to lift or lower the mechanical device installed in a certain position as well as the place where the forklift cannot move.

The lift apparatus of the prior art uses a lot of those configured in the hydraulic cylinder drive method using the hydraulic pressure as a power source.

The hydraulic cylinder drive type of the lift device is installed up and down by a support link that is supported on the floor and a carrier for lifting a heavy object up and down by the "X" shape, the "X" shaped operation link is It is a structure that connects the piston rod of the hydraulic cylinder. As the piston rod moves forward and backward, it is transported by scissors narrowing or opening with the "x" shaped operation link based on the main hinge formed at the center. It is configured to operate the table up and down.

However, the following problems are pointed out in the lift device of the hydraulic cylinder drive system as described above.

That is, a hydraulic unit for supplying and recovering hydraulic pressure to a hydraulic cylinder mounted between a support supported on the floor and a carrier for transporting heavy objects up and down takes up a lot of installation space. As the oil leaks little by little in the cylinder itself, this causes the carrier not to be fixed in the up-operated position and gradually falls as time goes by. Due to the phenomenon, it often happens that the carriage cannot be stopped at the correct position, and there is a problem such that the carriage does not right and left sync correctly. In addition, in the winter or at low temperature, the hydraulic unit is idled. High power consumption and hydraulic Is that due to the oil leakage from the cylinder contaminate the surrounding of the lifting device has been pointed out as a problem.

The present invention has been made to solve the problems of the conventional hydraulic cylinder driving method as described above, and the forward and reverse rotation operation is possible, the noise is generated by the geared motor having the brake function as the power source in the stopped state of rotation. It is not only able to stop at the desired position during the lifting and lowering operation, but also when the carrier is lifted up and down at the desired height, the carrier is kept in the fixed position at the position so that the machine is put into the production line at the industrial site. It is designed to provide a lift device that can be fixed to the desired height.

The present invention as a means for achieving the above object,

The bottom part is formed in a flat rectangular shape and fixed to the bottom, a carrier which is installed directly above the support, which moves up and down, and the upper and lower ends of the carrier are respectively slidable. In the lift device composed of the main operation link of the structure that is rotatably coupled to the main portion of the intersecting center while crossing the supporting both links in the "X" shape,

It is fixedly attached to the output end to surround the output shaft of a conventional geared motor installed horizontally inside the carriage and the support, and at the same time rotatably connects the center where both main links of the main operation link intersect the "X" shape. An output end cover case to which one end of the main hinge is connected;

A ball screw shaft directly connected to the output shaft of the geared motor by a connection case fixedly attached to the output end cover case;

A ball screw nut body installed on the ball screw shaft and moving forward and backward along the ball screw shaft according to the forward and reverse rotation operations of the geared motor;

Both links are installed in an "X" shape so as to be symmetrical with respect to the ball screw axis, and one end of each of the auxiliary links is rotatably connected to the upper and lower sides of the ball screw nut body, while the other end of each of the auxiliary links is An auxiliary operation link rotatably connected to each of both main links constituting the main operation link at an upper side and a lower side of the main hinge;

It is characterized by consisting of

In addition, the lower surface of the carrier and the upper surface of the support to the diagonally facing each other so that the support rollers are freely rotated in the upper and lower ends of one of the main link of the two main link constituting the main operation link to move the cloud within a predetermined range. While forming a restraining upper and lower movement control unit, one of the upper and lower movement control unit is equipped with two limit switches to control the drive of the geared motor when the carriage reaches the top dead center or the bottom dead center. It is characterized by being configured to include

In addition, the upper connecting housing fixed to the center of the bottom of the carrier and the upper middle of the other main link, the upper and lower ends of the main operation link is not constrained by the upper and lower movement control part of the main link is composed of the upper link. The lower connection housing fixed to the center of the upper surface of the support and the middle of the other main link is characterized in that it comprises a structure to be connected to the lower connection link.

1 is a front view showing a state in which the lift device of the present invention is operated up.

2 and 3 is an operating state of the present invention.

Figure 4 is a main portion of the present invention of the geared motor and the ball screw shaft and auxiliary operation link

Drawing showing the state of assembly.

※ Explanation of code for main part of drawing

1: support 2: carrier

3: Main operation link 3a, 3b: Both main link

4 geared motor 5 ball screw shaft

6a, 6b: Upper and lower connection link 7a, 7b: Limit switch

8: Ball screw nut 9: Auxiliary operation link

9a, 9b: Auxiliary link on both sides 11,21: Rail plate

12,22: upper and lower movement control unit 13: stopper

31: main hinge 32: support roller

41: output stage cover case 51: connection case

52: nipple 61,62: upper and lower connection housing

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view showing a lift device of the present invention in a state of operation, Figure 2 and Figure 3 is an operating state of the present invention, Figure 4 is a main part of the present invention geared motor and ball screw shaft and auxiliary operation link Figure showing the assembly state of,

Reference numeral 1 denotes a support, and 2 indicates a lift table, and the support 1 is formed in a flat structure so that it can be stably installed on a flat bottom, and the carrier 2 also stably lifts a heavy object. It is formed in a flat structure so that it can be lifted up and down.

The main operation link (3) is installed between the support (1) and the carrier (2), the main operation link (3) is a state in which both main links (3a) (3b) cross each other in the "X" shape It is installed as, the central portion where the two main links (3a) (3b) intersect is rotatably connected by the main hinge (31).

In addition, both main links (3a) (3b) constituting the main operation link (3) has a structure that is installed symmetrically on both sides before and after.

A geared motor 4 as a power source is horizontally installed at the center of the main operation link 3, and the geared motor 4 is before and after the output end cover case 41 fixedly attached to the output end to surround the output shaft. Both sides are fixedly attached to one end of the main hinge 31 passing through the intersections of both main links 3a and 3b, and are installed horizontally in the middle of the support 1 and the carrier 2. It is.

The output end cover case 41 of the geared motor 4 is directly connected to the output shaft of the geared motor with one end of the ball screw shaft 5 inserted therein, and the ball screw shaft 5 is the output end cover case 41. It is installed in a structure that is directly connected to the output shaft of the geared motor while being rotatably supported by a connection case 51 fixedly attached to the bolt.

The nipples 52 are screwed on the plurality of oil inlets formed to replenish oil on the upper surface of the connection case 51 connecting the ball screw shaft 5 to the geared motor 4 directly. When the oil is to be supplied into the connection case 51, the nipple 52 is unscrewed to be disassembled and then oiled.

Support rollers which move on the upper and lower ends of each of the main links 3a and 3b constituting the main operation link 3 while being supported on the bottom of the carrier 2 and the upper surface of the support 1 ( 32 is mounted, and each of the bottom surface of the carrier (2) on which the support rollers 32 are supported and the upper surface of the support (1) rail plate for smoothly guiding the rolling movement of the support rollers (32) ( 21) and 11 are provided.

Where the lower surface of the carriage 2 and the upper surface of the support 1 face each other diagonally to each other, one of the links 3a of the two main links 3a and 3b constituting the main operation link 3 is formed. The upper and lower movement control parts 22 and 12 are formed to restrain the roller 31 attached to the upper and lower ends, and the left and right lengths of the upper and lower movement control parts 22 and 12 are main operation. Both main links 3a and 3b of the link 3 are formed in a standard capable of raising and lowering the carriage 2 to the maximum.

On the other hand, the rollers 32 installed on the upper and lower ends of the other main link 3b of the main operation link 3 are not constrained, while the other main link 3b itself is the upper and lower connection links 6a and 6b. Bound by That is, both ends of the upper link link 6a are rotatably connected to the upper link housing 61 fixed to the middle of the bottom surface of the pallet 2 and the middle upper part 6b of the other main link 3b. Both ends of the lower connection link 6b are also rotatably connected to the lower middle of the lower link housing 62 and the other link 3b fixedly attached to the upper middle portion of the support 1.

The upper and lower connection links 6a and 6b have support rollers 32 attached to the upper and lower ends of the other main link 3b of the main operation link 3 to the rail plates 21 and 11 at all times. It is responsible for the cloud movement in the supported state.

In addition, any one of the upper and lower movement control units 22 and 12 which restrains the support rollers 32 attached to the upper and lower ends of the main link 3a of the main operation link 3 (the embodiment shown in the drawing). In the example, the lower movement control section is equipped with two limit switches 7a and 7b for controlling the drive of the geared motor 4.

That is, the one limit switch 7a located inside of the two limit switches does not show the signal when the support roller 32 attached to the lower end of one main link 3a of the main operation link 3 comes into contact. The main operation link (3) raises the carriage (2) to the top dead center position, which is the maximum height, so that the geared motor (4) can be stopped by sending it to the control device. The limit switch 7b sends a signal to a control device (not shown) to stop the geared motor 4 when the support roller 32 attached to the lower end of the main link 3a of one side of the main operation link 3 comes into contact. When the main operation link (3) lowers the carriage (2) to the bottom dead center position, which is the minimum height, the lowering operation is stopped so that the carriage (2) is geared so as not to be out of the range of the top dead center and the bottom dead center. The rotor 4 can be accurately controlled.

In the ball screw shaft 5 directly connected to the output end of the geared motor 4, the ball screw nut body 8 moving forward and backward in the ball screw shaft 5 according to the forward and reverse rotation operation of the geared motor is provided. It is installed, the auxiliary operation link (9) is connected to the upper and lower ends of the ball screw nut body (8), the auxiliary operation link (9) has a "X" shape based on the ball screw shaft (5) It consists of both side auxiliary links (9a) (9b) are installed symmetrically to achieve.

One end of one side auxiliary link (9a) constituting the auxiliary operation link (9) is rotatably connected to the upper end of the ball screw nut body (8) while the other end of one side auxiliary link (9a) is the main operation link (3). Of the other side auxiliary link (3b) is rotatably connected, and in the case of the other side auxiliary link (9b), one end thereof is rotatably connected to the lower end of the ball screw nut body (8). It is rotatably connected to the middle upper portion of one side auxiliary link (3a) of the main operation link (3).

On the left and right sides of the support 1, a stopper 13 formed of a cushioning material is installed as a safety device for lowering the carriage 2 only up to a predetermined position.

Then, attaching the bracket 14 to the four corners of the support (1) and then attaching the wheel to the bracket facilitates the mobility of the lift device itself.

On the other hand, although not shown in the drawings of the present invention, the operation switch box and the control box for controlling the forward and reverse rotation operation of the geared motor (4) is installed on the outside of the support or the carrier, in the case of the operation switch box The geared motor 4 is equipped with a manual release lever (not shown) for releasing brake operation. It is comprised so that the carried carriage 2 can be lowered manually.

Referring to the operation of the present invention configured as described above are as follows.

First, as shown in FIG. 3, when the lowering operation is completed while the carrier 2 is supported by the stopper 13, the height of the carrier 2 becomes the lowest position, and thus it is easy to place a heavy object. When the carriage 2 is completely lowered in this way, the ball screw nut body 8 is moved to the free end (right end in the drawing) of the ball screw shaft 5. On both sides of the main link (3a), the main link (3a) (3b), the main hinge (31) as a starting point is lying near to the horizontal.

When the lift button of the operation switch box (not shown) is turned ON when the object is placed on the lowered carrier 2 as described above, the geared motor 4 rotates forward (or reverse). The ball screw shaft 5 is also rotated accordingly, and when the ball screw shaft 5 is rotated in the forward direction, the ball screw nut body 8 moves toward the geared motor 4, Accordingly, the auxiliary operation link 9 is also moved together, and the other end of both side auxiliary links 9a and 9b rotatably connected to the upper and lower ends of the ball screw nut body 8 to have an "X" shape. It is configured to push both main links (3a) and (3b) of the main operation link (3) while crossing, so that both main links (3a) and (3b) are lying while lying while rotating from the main hinge (31) as a starting point. Likewise, it will stand up upwards, and thus the main operation As the cage 3 stands up, the carriage 2 also rises. At this time, when the lift operation of the carriage 2 is to be stopped, the stop button of the operation switch box (not shown) is operated to operate the geared motor ( 4) can be stopped, or when the carriage 2 is raised to the maximum height, as shown in FIG. 2, the support roller 32 at the lower end of the main link 3a of the main operation link 3 is the limit switch. It comes into contact with 7a, whereby the geared motor 4 stops.

As described above, the geared motor 4 which is stopped in the state in which the carriage 2 is raised to a predetermined height or in the state of being raised to the maximum height stops the ball screw shaft 5 by the brake action, and thus a heavy object is lifted. The carriage 2 which is in place will stop as it is in the position where the ascent is stopped.

On the other hand, if you want to lower the carriage (2) to raise the operation of the down button on the operation switch box geared motor (4) is rotated in the opposite direction than when raising the carriage, accordingly Since the screw shaft 5 also rotates in the same direction, the ball screw nut body 8 moves toward the free end side (rightward direction in the drawing). Thus, the ball screw nut body 8 moves to the ball screw shaft 5. 2) the auxiliary link 9a, 9b of the auxiliary actuating link 9 pulls both main links 3a, 3b of the main actuating link 3, Both sides of the main link (3a) (3b) of the operation link (3) is to rotate the main hinge 31 as the starting point to lie down at an angle close to horizontal progress, as shown in Figure 3 the main operation link ( When 3) is completely laid down, support at the bottom of one main link (3a) Errors (31) standing in contact with the other side because the limit switch (7b), thereby stopping the geared motor (4) the pallet (2) will be dropping up to the state supported by the stopper 13.

According to the present invention as described above, as the geared motor is driven forward or reverse rotation, the carriage can be raised or lowered up and down as well as the effect can be accurately stopped at a desired height. As the brake acts to stop the carriage as it is at the desired height, the lift device of the present invention needs to periodically adjust the height of the installation position of the machinery of the production line in the production plant, which can contribute to improving productivity. In addition, when replenishing oil to the output case cover case and the connection case where the geared motor and the ball screw shaft are directly connected, the nipples mounted on the oil supply passage of the connection case can be unscrewed and disassembled to supply oil. For example, to make supplementary lubrication convenient. It is designed to provide useful.

Claims (3)

The bottom part is formed in a flat rectangular shape and fixed to the bottom, a carrier which is installed directly above the support, which moves up and down, and the upper and lower ends of the carrier are respectively slidable. In the lift device composed of the main operation link of the structure that is rotatably coupled to the main portion of the intersecting center while crossing the supporting both links in the "X" shape, It is fixedly attached to the output end to surround the output shaft of a conventional geared motor installed horizontally inside the carriage and the support, and at the same time rotatably connects the center where both main links of the main operation link intersect the "X" shape. An output end cover case to which one end of the main hinge is connected; A ball screw shaft directly connected to the output shaft of the geared motor by a connection case fixedly attached to the output end cover case; A ball screw nut body installed on the ball screw shaft and moving forward and backward along the ball screw shaft according to the forward and reverse rotation operations of the geared motor; Both side auxiliary links are installed in an "X" shape so as to be symmetrical with respect to the ball screw axis, and one end of each of the two auxiliary links is rotatably connected to the upper and lower sides of the ball screw nut body while the other end is outside the main hinge. An auxiliary actuating link rotatably connected to each of both main links constituting the main actuating link in a position; Motor lift apparatus, characterized in that configured to include a. The method of claim 1, The lower surface of the carrier and the upper surface of the support are diagonally opposite to each other, so that the support rollers freely rotated on the upper and lower ends of one main link of the two main links constituting the main operation link can be clouded within a predetermined range. The upper and lower movement control unit is formed, while either one of the upper and lower movement control units is equipped with two limit switches to control the drive of the geared motor when the carriage reaches the top dead center or the bottom dead center. Motor lift apparatus, characterized in that configured to include. The method of claim 1, The upper connection housing fixed to the center of the bottom of the carrier and the upper middle of the other main link, the upper and lower ends of the main operation link is not constrained by the upper and lower movement control unit of the main link is connected to the upper connection link, The lower connection housing fixed to the center of the upper side and the lower portion of the support of the other main link is a motor lift apparatus characterized in that it comprises a structure to be connected to the lower link.