JP3181272U - Pneumatic power lifter - Google Patents

Abstract

An air-type power lifter capable of supplying air and lifting a vehicle is provided.
Link mechanisms 3a and 3b are interposed between a base 6 and tables 1a and 1b on which a vehicle is mounted, and air springs 2a and 2b are attached. The link mechanisms 3a and 3b connect the tables 1a and 1b to the base 6. The air springs 2a and 2b are provided with an air circuit for supplying and discharging air, and when the tables 1a and 1b rise to reach the top dead center, they are prevented from rising further. The stopper and the stopper which prevents falling from the top dead center alone are installed.
[Selection] Figure 1

Description

  The present invention relates to a power lifter that can lift a vehicle using air pressure.

When servicing a vehicle or changing tires, the vehicle must be lifted, and a lifter (jack) is used to lift the vehicle. Here, there are various types of jacks. In general, there are a large jack for lifting the entire vehicle and a small jack for lifting a part of the vehicle.
And each of these jacks has an overwhelmingly large number of those basically having a hydraulic cylinder. That is, the vehicle can be pushed up or lifted by protruding the piston lot (plunger) of the hydraulic cylinder. The large jack is a permanent type and can push up the entire vehicle at once, and the small jack moves to a predetermined place and pushes up a part of the vehicle.

  By the way, these hydraulic jacks use a pump to introduce hydraulic oil into a hydraulic cylinder, and the hydraulic oil causes the piston (plunger) to protrude and push up the vehicle, but the plunger stopped at a predetermined height Fixed in position. When the maintenance of the vehicle is completed, if the switching valve is switched by operating the lever, the vehicle whose plunger is retracted and pushed up is lowered.

  If it is a permanent large jack, it is possible to use a solenoid valve as a switching valve for flowing hydraulic oil in and out, and operating a pump for feeding the hydraulic oil to the hydraulic cylinder with a motor. You can also. However, a movable small jack cannot be equipped with a hydraulic pump and motor for operating a hydraulic cylinder, and is generally configured to operate the hydraulic pump using air pressure.

  A “movable simple jack” according to Japanese Patent Application Laid-Open No. 2004-307093 is provided with a plunger that slides a hydraulic cylinder on a main body with wheels mounted on both sides, and the plunger protrudes by applying hydraulic pressure. And it is a simple type jack that can be moved to any place by the handle operation of the lever extending from the main body, so that the plunger can be lifted by hitting the jack up point on the bottom of the vehicle body even at night I have to.

By the way, by providing a hydraulic cylinder, its lifting ability is large, and even a large vehicle can be lifted up. However, the plunger rise of the hydraulic cylinder is slow, so it takes time for the vehicle to be raised to a predetermined height. Of course, the structure is complicated.
"Mobile simple jack" according to Japanese Patent Application Laid-Open No. 2004-307093

  As described above, the conventional hydraulic jack (lifter) has the above-described problems. The problem to be solved by the present invention is this problem, and an air type power lifter is provided that allows the table to be moved up and down quickly and smoothly using air pressure.

  The power lifter according to the present invention is configured such that a table on which a vehicle is mounted can be moved up and down by using air pressure. Therefore, the table on which the vehicle is mounted is connected via a link mechanism attached to the base, and is supported by an air spring provided on the base. That is, the table is supported by a link mechanism and an air spring, but the link mechanism holds the table that moves up and down in parallel (horizontal) with the base, and the air spring is a conventionally known member that fills the interior with air. If so, the table rises and the table rises. Conversely, when the air is removed, the table is compressed and the table is lowered.

  When the air spring extends and the table rises and reaches a predetermined height (top dead center), a rise prevention stopper is provided so that it does not rise any further, and the table is lowered by itself from the top dead center. A descent prevention stopper is attached to prevent this. Here, the number of link mechanisms and air springs that support the table varies depending on the size of the table, and is not limited. The link mechanism generally has a structure in which two links are crossed in an X shape. In addition, an extension arm is attached to the table as needed, and an attachment that hits the jack point of the vehicle is provided at the tip.

  The power lifter according to the present invention uses air, and the lifting / lowering speed of the table is faster than that of the hydraulic power lifter. Further, since air can be used for other equipment in the factory, that is, it is not necessary to provide a dedicated air pump, and the structure as a power lifter is simplified.

  Then, the vehicle that has been placed on the table and raised to a predetermined height does not cause the table to descend by itself due to the operation of the stopper attached to the power lifter. Here, since the stopper is attached to the table and can be swung, the stopper is swung up by its own weight at the same time that the table is lifted, and the stopper automatically works, and the safety is Secured. When the table is lowered, the air cylinder operates so that the stopper is released at the same time as the air spring is pulled out, and it is not necessary to release the stopper each time.

The Example which shows the air-type power lifter which concerns on this invention. Link mechanism and stopper device provided between the base and the table. Air circuit for operating the power lifter. Another embodiment showing an air power lifter according to the present invention.

  FIG. 1 shows an external view of an embodiment of a pneumatic power lifter according to the present invention. In the figure, 1a and 1b represent tables, 2a and 2b represent air springs, 3a and 3b represent link mechanisms, and 4a and 4b represent shooters, respectively. The front and rear side edges of the tables 1a and 1b are connected by connecting members 5 and 5, and both the tables 1a and 1b can be raised and lowered simultaneously by operating the air springs 2a and 2b.

  The air springs 2a and 2b are attached to both sides of the base 6, and the upper ends thereof are connected to the tables 1a and 1b. Between the base 6 and the tables 1a and 1b, link mechanisms 3a and 3b crossed in an X shape are provided. Intervene. If air is supplied to the air springs 2a and 2b, the air springs 2a and 2b extend and the tables 1a and 1b rise. At the same time, the links of the same length in the link mechanisms 3a and 3b swing following the ascent of the tables 1a and 1b. The link mechanisms 3a and 3b are kept parallel to the base 6 regardless of the height of the tables 1a and 1b.

  The tables 1a and 1b in the same figure show a case where they are raised, but if they are lowered, the upper surfaces of the tables 1a and 1b are at the same position as the upper parts of the inclined shooters 4a and 4b, and the vehicle is in the shooters 4a and 4b. And the tables 1a and 1b are arranged so as to be positioned at the bottom of the vehicle. Then, if air is supplied and the air springs extend, the tables 1a and 1b rise, and the vehicle placed on the tables 1a and 1b is lifted.

  2A and 2B show a stopper device in which the table 1 operates as it is lifted. FIG. 2A shows a locked state in which the stopper works, and FIG. 2B shows a case where the stopper is released. A link mechanism 3 is interposed between the base 6 and the table 1, and the link mechanism 3 has links 7a and 7b having the same length crossed in an X shape. Are linked.

  One end of the link 7a is connected to the base 6 by a shaft 9a, and one end of the link 7b is connected to the table 1 by a shaft 9b. A roller 10 a is pivotally supported at the tip which is the other end of the link 7 a, and the roller 10 a is fitted in a guide provided on the table 1. Similarly, a roller 10b is pivotally supported at the tip which is the other end of the link 7b, and the roller 10b is fitted in a guide provided on the base 6. Therefore, if the table 1 moves up and down, the rollers 10a and 10b pivotally supported at the ends of the links 7a and 7b can move along the base 6 and the guides provided on the table 1.

  By the way, a stopper 11 is pivotally supported on the table 1, and the stopper 11 is functioning in FIG. 2A, and FIG. 2B is a case where the stopper 11 is released. . The stopper 11 is pivotally supported by the table 1 and can swing. If the table 1 rises and reaches top dead center, the stopper 11 pivotally supported by the table 1 hangs vertically downward by its own weight, It can be locked to a metal fitting provided on the base 6.

  If the stopper 11 is hung downward and locked to the base metal fitting, the table 1 cannot be lowered. Therefore, even if air leaks from the air spring 2, the vehicle placed on the table 1 can be safely operated without lowering. That is, the stopper 11 is a safety device for preventing the descent.

  On the other hand, a stopper 12 for preventing ascent is attached to the power lifter of the present invention. If a stopper 12 composed of a chain is connected between the base 6 and the table 1 and the table 1 rises and reaches top dead center, the doubly chain is tense and further rise is prevented. That is, the stopper 12 is a safety device for preventing the rise.

  FIG. 3 shows an embodiment showing an air circuit of a power lifter. Air from the air supply source 16 passes through the regulator 13 and is sent to the air springs 2a and 2b or the stopper release cylinders 15a and 15b. A foot pad 14 is interposed between the regulator 13 and the air springs 2a and 2b or the linders 15a and 15b for releasing the stopper.

  The foot pedal 14 is connected to a switching valve. When the foot pedal 14 is depressed, the switching valve is switched to change the air flow. That is, when air is supplied to the air springs 2a and 2b, or air is supplied to the stopper release cylinders 15a and 15b, the operator steps on the foot pedal 14 and switches the switching valve as the work progresses. I can do it.

  By the way, although the switching valve shown in the figure is in a state where air does not flow, if the left side port is switched, the air from the regulator 13 is supplied to the air springs 2a and 2b, and the air springs 2a and 2b are extended. To do. And the vehicle mounted on the tables 1a and 1b rises. When the tables 1a and 1b rise and reach top dead center, the stopper 11 shown in FIG. 2 swings and hangs down, and the lower end of the stopper 11 is locked to a metal fitting provided on the base 6.

  When the necessary work is completed, the vehicle is lowered by lowering the tables 1a and 1b. In this case, if the foot pedal 14 is depressed to shift to the right port, the air filled in the air springs 2a, 2b is discharged, and at the same time, air from the regulator 13 is sent to the stopper release cylinders 15a, 15b, The rod extends and presses the lower end of the stopper 11 to be detached from the base 6 metal fitting. If the stopper 11 is detached from the bracket, the stopper 11 falls down as the tables 1a and 1b are lowered.

  In this way, the stopper 11 is synchronized with the raising and lowering movement of the tables 1a and 1b, and at the same time the top dead center is reached, the lower end of the stopper 11 engages with the metal fitting and can be detached from the metal fitting when the table is lowered. So that it is automatically controlled. That is, forgetting to apply the stopper 11 or forgetting to release it does not occur.

  FIG. 4 shows another embodiment of the power lifter according to the present invention. Extension arms 17a and 17a are attached to the table 1a of the power lifter, and extension arms 17b and 17b are attached to the table 1b. The extension arms 17a, 17b, 17b, 17b can be expanded and contracted, and can swing around an axis provided at the base. And attachment 18a, 18a, 18b, 18b is attached to the front-end | tip of extension arm 17a, 17a, 17b, 17b.

  In this way, the extension arms 17a, 17a, 17b, and 17b expand and contract and swing, and the attachments 18a, 18a, 18b, and 18b attached to the tips are applied to the jack points to raise the tables 1a and 1b. Therefore, the vehicle can be raised on the tables 1a and 1b via the attachments 18a, 18a, 18b and 18b.

1 Table 2 Air Spring 3 Link Mechanism 4 Shutter 5 Connecting Member 6 Base 7 Link 8 Axis 9 Axis
10 Laura
11 Stopper
12 Stopper
13 Regulator
14 Foot pedal
15 Stopper release cylinder
16 Air supply source
17 Extension arm
18 Attachment

Claims (3)

In an air-type power lifter that can lift the vehicle by supplying air, a link mechanism is interposed between the base and the table on which the vehicle is mounted, and an air spring is attached. The link mechanism keeps the table parallel to the base. , And provide an air circuit for supplying and discharging air to the air spring, and when the table rises to reach top dead center, it will drop from the top dead center alone with a stopper that prevents further rise Pneumatic power lifter with a stopper to prevent it. The pneumatic power lifter according to claim 1, wherein an extension arm that can be expanded and contracted is attached to the table in a swingable manner, and an attachment that is applied to a jack point is attached to a tip of the extension arm. The pneumatic power lifter according to claim 1 or 2, wherein an air cylinder for releasing the lower end of the descent prevention stopper from the bracket is attached to the base.