KR100459499B1 - Hydraulic jack by operated by electric for automobiles - Google Patents

Abstract

The present invention allows a hydraulic pump to be operated by a motor using a battery of a passenger car, and a plurality of rams are raised and lowered smoothly by the generated hydraulic pressure, while lowering and lowering the vehicle to provide convenience to the user. It relates to an electric hydraulic jack.

Description

Electric Hydraulic Jack for Car Lift {HYDRAULIC JACK BY OPERATED BY ELECTRIC FOR AUTOMOBILES}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hydraulic jack for lifting an automobile, and in particular, a hydraulic pump is operated by a motor using a battery of a passenger car, and a plurality of rams are gently lifted and lowered by a hydraulic pressure generated by a user. The present invention relates to an electric hydraulic jack for lifting and lowering a vehicle.

Generally, a lifting device used to replace a tire of a passenger car has been developed into an electric jack through a screw jack, a rack, a hydraulic jack.

In connection with the hydraulic jack, Korean Utility Model Publication No. 89-6760 discloses a hydraulic jack in which a piston and a supporting rod are installed inside a tank in which hydraulic oil is stored, and a lever socket is installed on one side of the tank. However, in order to elevate the piston and the supporting rod, the user holds the lever socket with his hand and repeatedly moves it up and down, causing the hydraulic oil to be pumped, which takes a lot of power and time depending on the weight of the vehicle. As soon as the back of the tank is returned to the tank, the supporting rod and the piston are lowered momentarily by the weight of the vehicle, and there is a concern that a safety accident may occur.

The present invention has been made to solve the above problems, the object of which is to provide a convenience to the user by providing a convenience to the user by allowing the plurality of rams to be raised and lowered gently by using the battery of the car as a power source. It is to provide a hydraulic jack.

The present invention is installed in the tank in which the operating oil is stored in order to achieve the above object, the first stage ram provided with a support and the two-stage ram provided with a two-stage ram upward flow path therein is installed therein, the upper top The ram housing supported by the fixing part, the lower part of the ram housing is inserted, the circumferential surface is coupled to the inner surface of the tank, the passage is connected to the tank and the descending passage is connected to the space between the ram housing and the two-stage ram Lifting drive unit which is the lower fixing part is formed a passage; A power transmission unit configured to be a motor rotated using a battery of a passenger car as a power source, a deceleration unit for decelerating the output of the motor, and a hydraulic pump for pumping hydraulic oil of the tank by the decelerated output; A discharge operation flow path and a circulation operation flow path for supplying the hydraulic oil in the tank to the hydraulic pump, a lifting operation flow path and a lifting oil supply path for supplying the pumped hydraulic fluid to the bottom of the first stage ram, and the elevated ram It is a rectangular parallelepiped body provided with a downward working flow path for returning the working oil into the tank. A rectangular groove is formed at the center of the surface in the width direction, and a lower fixing part is mounted on one side of the groove, and a hydraulic pump is mounted on the other side. Working oil circulation plate; And a lift valve mounted in the groove and configured to turn a valve to open and close each passage formed in the working oil circulation plate for pumping hydraulic oil to raise or lower the first and second stage rams sequentially. To provide an electric hydraulic jack for.

1 is a plan view of a hydraulic jack according to the present invention,

FIG. 2 is a longitudinal sectional view taken along the line “I-I” of FIG. 1;

3 is a longitudinal cross-sectional view taken along line "II-II" of FIG. 1;

4 is a plan view of the operating fluid circulation plate according to the present invention;

5 is an exploded perspective view of a working oil circulation plate according to the present invention;

Figure 6a is a cross-sectional view of the direction switching valve showing the lifting operation of the lift drive unit according to the present invention.

Figure 6b is a cross-sectional view of the direction switching valve showing the lowering operation of the elevating drive unit according to the invention

7A is a hydraulic circuit diagram of FIG. 6A;

FIG. 7B is a hydraulic circuit diagram of FIG. 6B.

* Explanation of symbols on the main parts of the drawings *

100 ... lifting drive 110 ... tank

110 a ... inlet 112 ... base

114 ... upper stationary government 116 ... lower stationary government

116a, 120a, 130a, 140a ... O-ring 116c, 116d ... Passage

120 ... ram housing 122 ... descent euro

130 ... 1 step Ram 130b, 140b ... Backup ring

132 ... Base 140 ... 2-stage Ram

142 ... two-stage ramp-up flow path 200 ... power train

210 ... motor case 212 ... motor

212a ... Motor shaft 212b ... Motor gear

220 ... reduction gear 220a ... first planetary gear group

220b ... 2nd planetary gear group 220c ... Internal gear box

220 d ... power transmission member 230 ... hydraulic pump

230a ... pump shaft 300 ... working fluid circulation plate

300a ... Groove 310 ... Ram Mount

310a ... lifting operation flow path 310b ... lowering operation flow path

310c ... discharge operation flow path 320 ... pump mounting part

320a ... lifting hydraulic supply passage 320b ... circulation operating passage

330 ... directional valve 330a ... rod groove

332 ... toggle load 332a ... button

332b ... Working passages 332c, 332d, 332e, 332f ... Seals

A1, A2, A3, B1, B2, B3, D1, D2, D3, P1, P2, P3, S1, S2, S3 ... Port

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

1 and 2 and 3 is shown an electric hydraulic jack for lifting the vehicle according to the present invention, the hydraulic jack is a hydraulic oil circulation having a lifting drive unit 100, a power transmission unit 200, and a directional valve 330 It consists of a plate 300.

The elevating driving unit 100 is composed of a tank 110, a ram housing 120, a 1,2-stage ram 130, 140, and a lower fixing part 116,

The tank 110 is formed of a circular cylinder in which a certain amount of operating oil is stored therein, and an upper end portion is narrowly formed inwardly so that an upper fixing portion 114 is formed, and an oil supply hole 110a is formed on one side wall of the tank 110. Is formed. That is, the tank 110 is to be used as the case of the low flow of the hydraulic oil and the ram housing 120.

The ram housing 120 is a circular cylinder, the outer circumferential surface of the upper end is tightly fixed to the inner circumferential surface of the upper fixing part 114 of the tank 110, while the lower end is fixed by the lower fixing part 116, Is the same center, the first and second stage ram 130, 140 is installed in the inner side, the outer peripheral surface of the ram housing 120 is fixed to the inner peripheral surface of the upper fixing part (114) O-ring (120a) ) Is inserted to prevent leakage of hydraulic fluid.

The first stage ram 130 is a circular rod having the same height as the ram housing 120, the support 132 is installed on the upper end, the O-ring is installed on the upper and lower, respectively, the O-ring below The backup ring 130b is installed below the 130a.

The two-stage ram 140 is a circular cylinder having the same height as the ram housing 120 and the first-stage ram 130, the upper and lower O-rings are respectively installed, the lower portion of the lower O-ring (140a) The backup ring 140b is installed, and a part of the wall is formed on the upper part of the two-stage ram upward passage 142 vertically from the bottom to the upper part, the lower part is blocked by the plug, and the upper part is a circular ring. Is achieved. That is, the two-stage ram 140 is installed inside the ram housing 120, and the one-stage ram 130 is installed inside the two-stage ram 140. The two-stage ram 140 is installed while forming the same center with respect to each other.

The lower fixing part 116 is to fix the lower part of the ram housing 120, the upper part is fixed by the upper fixing part 114 of the tank 110, the ram housing 120 while forming the same center in the center The lower part of) is inserted and fixed. The lower end fixing part 116 is provided with an O-ring 116a on its circumferential surface, and is installed to be interviewed with the lower inner surface of the tank 110, and passages 116c and 116d perpendicular to two places. Is formed, one of the passages (116c) is in communication with the interior of the tank 110, another passage (116d) is in contact with the space between the ram housing 120 and the two-stage ram (140) It communicates with the flow path 122.

The power transmission unit 200 is composed of a motor 212, the reduction unit 220 and the hydraulic pump 230,

The motor 212 is connected to a cigar jack provided in the driver's seat of the vehicle and operated using a battery as a power source. The motor shaft 212a is installed in the motor case 210 facing downward, and the motor gear 212b is mounted on the motor shaft 212a. ) Is built up. The motor case 210 is vertically installed on one side of the tank 110 of the elevating driving part 100, and is installed on an upper portion of the cylinder extending from the tank 110 mounted on the base 112.

The reduction unit 220 is to reduce the output of the motor 212 to drive the hydraulic pump 230, the first planetary gear group 220a is built in the motor gear 212b, the second under The planetary gear group 220b is built up, and the pump shaft 230a of the hydraulic pump 230 is built up in the second planetary gear group 220b. While the first planetary gear group 220a and the second planetary gear group 220b are circular cylinders, the first planetary gear group 220a and the second planetary gear group 220b are located inside the internal gear cylinder 220c provided with gears along the inner circumferential surface thereof, and are gear-coupled at the same time.

The working oil circulation plate 300 is a rectangular parallelepiped plate body having a ram mounting portion 310 on one side and a pump mounting portion 320 on the opposite side, respectively, as shown in FIGS. 4 and 5. Formed,

The ram mounting portion 310 has a lifting operation flow path (310a) is formed at the center thereof, and a lowering operation flow path (310b) is formed on one side thereof, the discharge operation flow path (the other side of the lifting operation flow path (310a) 310c) are formed respectively. Ports A1, A2, B1, B2, D1 and D2 are formed at each end of the elevating, lowering and discharge hydraulic oil passages 310a, 310b and 310c, of which port A1. (B1) (D1) is formed on one side surface of the ram mounting portion 310 forming the groove (300a), the remaining ports (A2) (B2) (D2) is formed on the surface of the ram mounting portion 310 do. That is, the port A2 of the elevating operation flow path 310a is connected to the bottom surface of the first stage ram 130, and the port B2 of the descending operation flow path 310b is the passage of the lower fixing part 116. It is connected to the down flow path 122 through 116d, the discharge operation flow path 310c is connected to the passage 116c of the lower fixing section 116.

The pump mounting part 320 is provided with a lifting hydraulic oil supply passage 320a on one side, and the circulation operating flow passage 320b on the other side. The lifting hydraulic oil supply and circulation hydraulic oil passages 320a and 320b have ports P1, P2, S1, and S2 formed at their respective ends, of which ports P2 and S2 are grooves 300a. It is formed to open on the side wall surface of the pump mounting portion 320 forming a), and also the port (P1) (S1) is formed to open to the surface of the pump mounting portion (320). That is, the lifting hydraulic oil supply passage 320a allows the hydraulic pressure generated by the pumping action of the hydraulic pump 230 to be supplied to the first stage ram 130, and the circulating operating flow passage 320b is the hydraulic oil for pumping the hydraulic pump ( 230).

The passages 310a, 310b, 310c, 320a and 320b are formed in parallel to each other, respectively, and are formed in the ram mounting unit 310 or the pump mounting unit 320, respectively.

The direction switching valve 330 is formed of a rectangular parallelepiped is mounted inside the groove 300a, a cylindrical rod groove 330a in the longitudinal direction is formed inside the direction switching valve 330, the rod groove 330a ) Is coupled to the switching rod 332 having a button 332a. One side of the directional valve 330 is formed with a port (P3) (S3) to match the port (P2) (S2) of the pump mounting portion 320, the opposite side of the ram mounting portion 310 Ports A3, B3, and D3 are formed to coincide with ports A1, B1, and D1, and each of the ports A3, B3, D3, P3, and S3 is described above. In communication with the rod groove (330a).

The switching rod 332 is formed with a button 332a which is manually operated at one side end, while a plurality of sealing parts 332c, 332d, 332e, and 332f are formed on the outer circumferential surface at the same center. And a working flow passage 332b penetrating between the first sealing portion 332c and the second sealing portion 332d to the opposite side of the button 332a, and the rod of the directional valve 330. It is sealed and inserted into the groove 330a.

The present invention configured as described above is the lower end of the operating fluid circulation plate 300 is mounted on the upper surface of the base 112, and supports the lower portion of the ram housing 120 to the ram mounting portion 310 of the operating fluid circulation plate 300 The government 116 is mounted, and the hydraulic pump 230 is mounted on the pump mounting part 320. And the tank 110 is covered from the top of the ram housing 120, the upper circumferential surface of the ram housing 120 is fixed to the inner peripheral surface of the upper fixing part 114 of the tank 110, in the tank 110 The extended cylinder portion is covered by the hydraulic pump 230. Subsequently, the motor 212 provided with the reduction part 220 is installed in the upper part of the cylinder which covers the hydraulic pump 230, and the power transmission member 220d of the reduction part 220 adheres to the pump shaft 230a. The motor 212 is covered by the motor case 210, and the button 332a portion of the switching rod 332 of the directional valve 330 is exposed to the outside, and the motor ( 212) is electrically connected.

Ascending operation of the first and second stages (130, 140),

a) When power is applied to the motor 212, the motor gear 212b is rotated in one direction, by the reduction gear 220 provided with the first planetary gear group 220a and the second planetary gear group 220b. The output is decelerated, and the reduced pressure output causes the hydraulic pump 230 to operate.

b) the hydraulic oil passage 116c inside the tank 110 by the operation of the hydraulic pump 230, the discharge operation flow passage 310c, the port D3 of the directional valve 330 as shown in FIG. It is introduced into the hydraulic pump 230 via the space between the first and second sealing portions (332c) (332d) of the (332), the port (S3), the circulation operation flow path (320b),

c) pumped by the hydraulic pump 230, the space between the lifting hydraulic supply passage 320a, the port P3 of the direction switching valve 330, the second and third sealing portion 332e of the switching rod 332 Is supplied to the first stage ram 130 via the port A3 and the lifting operation flow path 310a to raise the first stage ram 130,

d) After the first stage ram 130 is raised, the working oil causes the two stage ram 140 to be raised through the two stage ram lift passage 142. That is, as shown in FIG. 7A, the hydraulic oil in the tank 110 is supplied to the lower portion of the elevating driving part 100 via the check valve (not shown) and the direction switching valve 330 by the hydraulic pump 230. The first and second stage rams 130 and 140 of the elevating driving unit 100 are sequentially raised.

Subsequently, the descending operation of the raised first and second stage rams 130 and 140 is made to be inserted into the rod groove 330a by pressing the switching rod 332 as shown in FIG. 6B, and operating the hydraulic pump 230.

a) The hydraulic oil is a space between the lifting hydraulic oil supply passage 320a, the port P3 of the direction switching valve 330, the second and third sealing portions 332d and 332e of the switching rod 332, and the port P2. ), The lower operation passage 310b, the lower fixing section 116 through the passage 116d, the lower passage 122, so as to be supplied to the space between the two-stage ram 140 and the ram housing 120, 2 Short ram 140 is lowered,

b) When the two-stage ram 140 is lowered, the operating oil is supplied to the space between the first-stage ram 130 and the second-stage ram 140 through the two-stage ram up flow passage 142 to lower the one-stage ram 130. .

That is, as shown in FIG. 7B, the hydraulic oil in the tank 110 is supplied to the upper portion of the elevating driving unit 100 via the check valve (not shown) and the direction switching valve 330 by the hydraulic pump 230. The two-stage ram 140 and the one-stage ram 130 of the lifting driving unit 100 descend sequentially.

In other words, the rising motion

a) The hydraulic oil in the tank 110 is elevated by the hydraulic pump 230 which is rotated in the clockwise direction by the operation of the motor 212, with a constant pressure and flow rate, the lifting hydraulic oil supply passage 320a, the directional valve ( 1 step ram 130 via the space between the port P3 of the 330, the second and third sealing portions 332d, 332e of the switching rod 332, the port A3, and the lifting operation flow path 310a. The first stage ram 130 is raised, the hydraulic fluid is prevented from flowing back through the check valve (not shown), so that the weight of the vehicle body when the first and second stage rams 130 and 140 are raised. It is possible to maintain the port (P3) (A3) of the directional valve 330 so that the hydraulic oil is supplied to the lower end of the first stage ram (130) to raise the first and second stage ram (130, 140) to the desired position By doing so, the passenger car can be safely rolled up.

b) Sealing with O-ring 130a and backup ring 130b to prevent hydraulic leakage when the first stage ram 130 is raised, and to prevent hydraulic leakage when the second stage ram 140 is raised. It seals with O-ring 140a and backup ring 140b. O-ring 120a of the ram housing 120 and the O-ring 116a of the lower fixing part 116 prevent leakage of oil. At this time, the rising position of the ram 130, 140, which is raised may be prevented from being damaged by determining the position by installing a stop ring (not shown).

The lowering operation is

When the switching rod 332 of the directional valve 330 is pressed, the ports P2, P3, B3, and B1 are connected to supply hydraulic oil to the upper portion of the ram housing 120, thereby providing two-stage ram 140 and The first stage ram 130 is sequentially lowered, and the hydraulic pressure that was applied at the time of returning is returned to the tank 110 via the discharge operation flow path 310c and the passage 116c of the lower fixing part 116. .

As described above, according to the present invention, a plurality of rams are raised and lowered smoothly and lowered by using the battery of the passenger car as the power source, thereby providing convenience to the user.

Claims (3)

It is installed inside the tank 110 in which the hydraulic oil is stored, and the support 132 and the first stage ram 130 and the second stage ram 140 are installed to have a ram housing 120 supported by the upper fixing part 114. In one thing, A two-stage ram upflow passage 142 is provided inside the two-stage ram 140, and a lower portion of the ram housing 120 is inserted and a circumferential surface is coupled to the inner surface of the tank 110, and connected to the tank 110. Lifting drive unit 100 is a lower passage fixing part 116 is formed a passage 116d is formed a passage 116c and the passage passage 116 is connected to the space between the ram housing 120 and the two-stage ram 140 is installed. ); Elevation operation passage 310c and circulation operation flow path 320b for supplying the hydraulic oil in the tank 110 to the hydraulic pump 230, and lifting and lowering for supplying the pumped hydraulic fluid to the bottom surface of the first stage ram 130. Of the rectangular parallelepiped provided with a working flow passage 310a and a lifting hydraulic flow passage 320a, and a descending hydraulic flow passage 310b for returning the hydraulic oil 130 and 140 to the lowered hydraulic tank 110 to be lowered. The plate body, a rectangular groove 300a is formed in the center, the working oil circulation plate 300 is equipped with a hydraulic pump 230 on one side of the lower fixing portion 116 on the other side around the groove 300a. ; Directional valve is mounted to the groove 300, the pumped hydraulic fluid to open and close the passage of the operating oil circulation plate 300 for the first stage ram 130 and the second stage ram 140 to be raised or lowered sequentially Electric hydraulic jack for lifting the vehicle, characterized in that consisting of (330). delete The method of claim 1, The directional valve 330 is connected to the ports A1, B1, D1, P2, S2 of the passages 310a, 310b, 310c, 320a, 320b on both side walls, respectively. Ports A3 (B3) (D3) (P3) (S3) are formed, and a circular rod groove (330a) connected to all of the ports (A3), (B3), (D3), (P3) (S3) therein. Is formed, and a plurality of sealing portions 332c, 332d, 332e, and 332f are formed at equal intervals in the rod groove 330a, while a button 332a is provided at the front end of the lower working flow passage. An electric hydraulic jack for lifting and lowering a vehicle, characterized in that a switching rod 332 having a working flow path 332b for connecting the furnace 310b and the discharge working flow path 310c is coupled thereto.