Spring apparatus of arm type for vehicle

Abstract

The present invention relates to an arm-type suspension system for a vehicle, and more specifically, to an arm-type suspension system for a vehicle capable of folding the wheels of the vehicle under no-load conditions. The arm-type suspension system of a vehicle according to the present invention comprises an oil conduit means, a first piston, a second piston, an arm cylinder means, oil, a first gas, a second gas, a rod piston means, a cylinder plug, a locking valve, and a rod arm portion. The oil conduit means is mounted on the vehicle and has a first port, a second port, and a third port formed therein to receive oil from the vehicle. The above-described female cylinder means is formed with a first cylinder portion open on one side, a second cylinder portion accommodating the first piston so as to be slidable on one side and the second piston so as to be slidable on the other side, a passage connecting the first cylinder portion to the second cylinder portion between the first piston and the second piston, and a valve receiving portion communicating with the second cylinder portion between the first piston and the second piston and communicating with the second port and the third port, respectively, and is mounted so as to be rotatable in the oil conduit means. The oil is filled into the first cylinder portion, the passage, and the second cylinder portion between the first piston and the second piston. The first gas can be filled into the interior of the second cylinder portion between the first piston and one end of the second cylinder portion and elastically compressed. The second gas can be filled into the interior of the second cylinder section between the second piston and the other end of the second cylinder section and elastically compressed. The rod piston means comprises a rod piston inserted into the first cylinder section to pressurize the oil, and a piston rod, one end of which is coupled to the rod piston and the other end of which is exposed at one open side of the first cylinder section. The cylinder plug is mounted on the first cylinder section to support the piston rod so as to slide and to close one side of the first cylinder section. The locking valve is mounted on the valve receiving section to turn the flow of oil from the second cylinder section to the second port on and off by the pressure of the oil flowing into the third port. One end of the rod arm is mounted so as to be rotatable on the vehicle, and the other end is hinge-coupled to the other end of the rod piston.At this time, the first cylinder portion between the rod piston and the cylinder plug and the first port are connected so that the rod piston is inserted into the first cylinder portion by oil supplied from the first port.

Description

Technology Field

[0001] The present invention relates to an arm-type suspension system for a vehicle, and more specifically, to an arm-type suspension system for a vehicle capable of folding the wheels of the vehicle under no-load conditions. Background Technology

[0002] A vehicle's suspension system plays the role of absorbing the shock transmitted through the wheels when the vehicle is in operation. Particularly when driving on unpaved roads or off-road terrain, the amount of shock the suspension system can absorb is critical because the external impact is significant. Conventional passive suspension systems utilize fixed orifices, making it difficult to effectively absorb external shocks arising from the diverse driving conditions of off-road terrain.

[0003] Therefore, an arm-type suspension system capable of absorbing impact differently depending on the unevenness of the road surface and the condition of the terrain by adjusting the cross-sectional area of ​​the Euro is disclosed in Registered Patent No. 10-1937694.

[0004] These suspension systems are primarily applied to combat vehicles, which operate not only on land but also on water. When driving on water, if the vehicle sinks into the water, significant resistance is generated, slowing down the vehicle's speed. In such cases, the vehicle's wheels must be folded; however, conventional suspension systems had a problem in that they could not be folded because the cylinders contained internal oil, which limited their range of motion. Prior art literature

[0005] Registered Patent No. 10-1937694 (Registration Date: January 11, 2019) Registered Patent No. 10-1846834 (Registration Date: April 3, 2018) Registered Patent No. 10-2463314 (Registration Date: November 1, 2022) Registered Patent No. 10-1826507 (Registration Date: February 1, 2018) The problem to be solved

[0006] The present invention aims to solve the above-mentioned problems. The present invention aims to provide a vehicle suspension system capable of widening the operating range of a cylinder so that the vehicle's wheels can be folded. means of solving the problem

[0007] The arm-type suspension system of a vehicle according to the present invention comprises an oil conduit means, a first piston, a second piston, an arm cylinder means, oil, a first gas, a second gas, a rod piston means, a cylinder plug, a locking valve, and a rod arm portion. The oil conduit means is mounted on the vehicle and has a first port, a second port, and a third port formed therein to receive oil from the vehicle. The above-described female cylinder means is formed with a first cylinder portion open on one side, a second cylinder portion accommodating the first piston so as to be slidable on one side and the second piston so as to be slidable on the other side, a passage connecting the first cylinder portion to the second cylinder portion between the first piston and the second piston, and a valve receiving portion communicating with the second cylinder portion between the first piston and the second piston and communicating with the second port and the third port, respectively, and is mounted so as to be rotatable in the oil conduit means. The oil is filled into the first cylinder portion, the passage, and the second cylinder portion between the first piston and the second piston. The first gas can be filled into the interior of the second cylinder portion between the first piston and one end of the second cylinder portion and elastically compressed. The second gas can be filled into the interior of the second cylinder section between the second piston and the other end of the second cylinder section and elastically compressed. The rod piston means comprises a rod piston inserted into the first cylinder section to pressurize the oil, and a piston rod, one end of which is coupled to the rod piston and the other end of which is exposed at one open side of the first cylinder section. The cylinder plug is mounted on the first cylinder section to support the piston rod so as to slide and to close one side of the first cylinder section. The locking valve is mounted on the valve receiving section to turn the flow of oil from the second cylinder section to the second port on and off by the pressure of the oil flowing into the third port. One end of the rod arm is mounted so as to be rotatable on the vehicle, and the other end is hinge-coupled to the other end of the rod piston.At this time, the first cylinder portion between the rod piston and the cylinder plug and the first port are connected so that the rod piston is inserted into the first cylinder portion by oil supplied from the first port.

[0008] In addition, in the arm-type suspension system of the vehicle described above, it is preferable that the oil conduit means be equipped with a joint. One end of the joint is inserted so that the arm cylinder means can rotate, and the other end is inserted into the vehicle. Furthermore, on the outer surface of the one end, a first groove, a second groove, and a third groove are formed in an annular shape along the circumferential direction and spaced apart at a certain distance in the axial direction. Additionally, a first port communicating with the first groove, a second port communicating with the second groove, and a third port communicating with the third groove are formed.

[0009] In addition, in the arm-type suspension system of the above-described vehicle, it is preferable that the locking valve comprises a valve body, a spool, and a spring. The valve body is formed to penetrate from one end to the other end so that one end communicates with the third port and the other end communicates with the second cylinder part, and a through hole is formed between the one end and the other end to supply oil flowing into the other end to the second port, and is received in the valve receiving part. The spool is inserted into the valve body to close one end of the valve body and is pressurized by the oil flowing into the third port, has a header part capable of closing the other end of the valve body, a plug part capable of closing the other end of the valve body, and a shaft part formed smaller than the inner diameter of the valve body so that the through hole is open, with one end coupled to the header part and the other end coupled to the plug part, and is inserted so as to slide inside the valve body. The above spring is supported at one end by the header portion and at the other end by the valve body so as to restore the position of the spool when the spool is pressurized by the oil and slides, thereby opening the other end of the valve body. Effects of the invention

[0010] According to the present invention, when the locking valve is opened, oil contained within the second cylinder section can be supplied to the vehicle. In this case, since the rod piston can enter the interior of the first cylinder section, the rotation angle of the suspension system can be increased, allowing the vehicle's wheels to be folded. Therefore, the resistance acting on the wheels can be reduced when the vehicle operates on water. Brief explanation of the drawing

[0011] FIG. 1 is a conceptual diagram of an embodiment of an arm-type suspension system for a vehicle according to the present invention. FIG. 2 is a partial view of an embodiment of FIG. 1, FIG. 3 is a conceptual diagram of the oil pipeline means of the embodiment of FIG. 1, FIG. 4 is a part diagram of the arm cylinder means of the embodiment of FIG. 1, FIGS. 5 and FIGS. 6 are part diagrams of the locking valve of the embodiment of FIG. 1. Specific details for implementing the invention

[0012] FIGS. 1 to 6 are embodiments of an arm-type suspension system for a vehicle according to the present invention.

[0013] An embodiment of an arm-type suspension system for a vehicle according to the present invention will be described with reference to FIGS. 1 to 6.

[0014] One embodiment of an arm-type suspension system of a vehicle according to the present invention includes an oil conduit means (10), an arm cylinder means (20), a first piston (31), a second piston (33), oil (not shown), a first gas (not shown), a second gas (not shown), a rod piston means (40), a cylinder plug (45), a locking valve (50), and a rod arm part (60).

[0015] The oil conduit means (10) is configured to supply or recover oil from the vehicle's oil tank to the arm-type suspension system of the present embodiment, and for this purpose, a first port (14a), a second port (14b), and a third port (14c) that can communicate with the vehicle's oil tank are formed and mounted on the vehicle body (1), such as a military vehicle. For this purpose, the oil conduit means (10) is provided with a joint (11) and a housing (15).

[0016] One end (12) of the joint (11) is exposed from the vehicle body (1), and the other end (13) is inserted into the vehicle body (1). The one end (12) exposed from the vehicle body (1) is inserted into the arm cylinder means (20) so that the arm cylinder means (20) can rotate around the one end (12) of the joint (11). On the outer surface of the one end (12), a first groove (12a), a second groove (12b), and a third groove (12c) are formed in an annular shape along the circumferential direction and are spaced apart at regular intervals. Additionally, a first port (14a), a second port (14b), and a third port (14c) are formed in the joint (11) so that oil can be supplied from the vehicle's oil tank to these grooves (12a, 12b, 12c). Here, the first port (14a) is connected to the first groove (12a), the second port (14b) is connected to the second groove (12b), and the third port (14c) is connected to the third groove (12c). Thus, oil supplied from the vehicle to the first port (14a) is supplied to the first groove (12a).

[0017] The housing (15) is mounted on the female cylinder means (20) by wrapping one end (12) of the joint (11) so that oil delivered from the joint (11) can be supplied to the female cylinder means (20). Thus, the housing (15) is fixed to the female cylinder means (20) but is mounted to the joint (11) so as to be rotatable. At this time, the housing (15) is formed with a first connecting hole (15a), a second connecting hole (15b), and a third connecting hole (15c) capable of delivering oil. The first connecting hole (15a) is connected to the first groove (12a), the second connecting hole (15b) is connected to the second groove (12b), and the third connecting hole (15c) is connected to the third groove (12c). Thus, oil supplied to the first port (14a) is supplied to the female cylinder means (20) through the first groove (12a) and the first connecting hole (15a). Here, since the grooves (12a, 12b, 12c) are formed in an annular shape along the circumferential direction, even if the housing (15) rotates, the connecting holes (15a, 15b, 15c) can communicate with the grooves (12a, 12b, 12c), so that oil can be delivered to the arm cylinder means (20). Meanwhile, the ports (14a, 14b, 14c) of the oil conduit means (10) are closed when the vehicle is operating on land, and are opened only when operating on water to allow the wheels to be folded. That is, in the arm suspension system, the ports (14a, 14b, 14c) are closed during normal operation of the vehicle so that the oil flow path forms a closed circuit, and the ports (14a, 14b, 14c) are opened only when it is necessary to fold the wheels, thereby opening the oil flow path and connecting to the vehicle's oil tank.

[0018] The female cylinder means (20) is rotatably mounted on one side of the oil conduit means (10), and a first cylinder part (21), a second cylinder part (23), a flow path (25), and a valve receiving part (27) are formed. In this embodiment, the female cylinder means (20) is rotatably coupled to one end (12) of the joint (11) by the housing (15) being coupled thereto.

[0019] One side of the first cylinder section (21) is open. Both ends of the second cylinder section (23) are closed and formed parallel to the first cylinder section (21). The flow path (25) is formed to be connected so that oil can flow from the first cylinder section (21) to the second cylinder section (23). At this time, the second cylinder section (23) is divided into three parts: a first gas chamber section (24b) and a second gas chamber section (24c) filled with the first gas and the second gas on both sides, and an oil chamber section (24a) filled with oil between them. Thus, the flow path (25) is formed to supply oil from the first cylinder section (21) to the oil chamber section (24a) of the second cylinder section (23). That is, the flow path (25) connects the first cylinder section (21) and the oil chamber section (24a). At this time, in order to implement a double spring in the second cylinder section (23), the pressure of the second gas contained in the second gas chamber section (24c) is formed to be higher than the pressure of the first gas contained in the first gas chamber section (24b). The valve receiving section (27) is formed so that a locking valve (50) can be inserted, and is in communication with the oil chamber section (24a) of the second cylinder section (23), the second port (14b), and the third port (14c). Here, the inlet (27a) of the valve receiving section (27) is in communication with the third port (14c), the inside (27b) is in communication with the oil chamber section (24a), and the second port (14b) is in communication between the inlet (27a) and the inside (27b). At this time, the female cylinder means (20) is connected to the first cylinder part (21) between the cylinder plug (45) and the rod piston (41) so that the oil supplied from the first port (14a) can pressurize the rod piston (41) and insert it into the first cylinder part (21). That is, the female cylinder means (20) is connected to the first port (14q) so that the oil discharged from the first port (14a) can be supplied from the first cylinder part (21) to the space between the cylinder plug (45) and the rod piston (41) as indicated by arrow X. Thus, when oil is supplied as indicated by arrow X, the rod piston (41) slides into the interior of the first cylinder part (21) due to the hydraulic pressure of the oil.

[0020] The first piston (31) is inserted so as to slide inside the second cylinder part (23) so that the first gas chamber part (24b) and the oil chamber part (24a) can be partitioned.

[0021] The second piston (33) is inserted so as to slide inside the second cylinder part (23) so that the second gas chamber part (24c) and the oil chamber part (24a) can be partitioned.

[0022] At this time, the distance of the area (23b) where the second piston (33) slides is formed to be longer than the distance of the area (23a) where the first piston (31) slides. Meanwhile, in this embodiment, the cross-sectional area of ​​the second piston (33) is formed to be smaller than the cross-sectional area of ​​the first piston (31). Therefore, in this embodiment, a guide cylinder (23_1) that guides the sliding of the second piston (33) is inserted inside the second cylinder part (23). At this time, the guide cylinder (23_1) is formed so that a flow path (25) is created between the outer surface and the second cylinder part (23). That is, in this embodiment, the flow path (25) is formed between the outer surface of the guide cylinder (23_1) and the inner surface of the second cylinder part (23), and the second piston (33) slides inside the guide cylinder (23_1). Thus, the length of the guide cylinder (23_1) becomes a distance that allows the second piston (23) to slide, and a second gas chamber (24c) is formed inside the guide cylinder (23_1). In addition, to prevent the second piston (33) from detaching from the guide cylinder (23_1), a stopper projection is formed at the end of the guide cylinder (23_1) to prevent the second piston (33) from detaching.

[0023] The rod piston means (40) comprises a rod piston (41) and a piston rod (43). The rod piston (41) is inserted into the first cylinder part (21) so as to pressurize oil in the first cylinder part (21). One end of the piston rod (43) is connected to the rod piston (41), and the other end is ejected from an open side of the first cylinder part (21).

[0024] The cylinder plug (45) is mounted on the first cylinder part (21) to support the piston rod (43) so as to slide and to close one side of the first cylinder part (21).

[0025] The locking valve (50) is inserted into the valve receiving portion (27) to turn on and off the flow of oil from the second cylinder portion (23) to the second port (14b) by the pressure of the oil flowing into the third port (14c). That is, it turns on and off the connection between the second port (14b) and the oil chamber portion (24a). To this end, the locking valve (50) is equipped with a valve body (51), a spool (53), and a spring (59).

[0026] The valve body (51) is penetrated from one end (51a) to the other end (51b) so that one end (51a) communicates with the third port (14c) and the other end (51b) communicates with the oil chamber (24a) of the second cylinder part (23). A through hole (51c) is formed between the one end (51a) and the other end (51b) so that oil flowing into the other end (51b) is supplied to the second port (14b). Thus, one end (51a) of the valve body (51) is located at the inlet (27a) of the valve receiving part (27), and the other end (51b) of the valve body (51) is located inside (27b) of the valve receiving part (27). The through hole (51c) of the valve body (51) is positioned so that it can communicate with the valve receiving part (27) which communicates with the second port (14b).

[0027] The spool (53) is mounted on the valve body (51) so that it can slide in the valve body (51) by the pressure of the oil flowing into one end (51a) of the valve body (51). At this time, the spool (53) is provided with a header portion (54), a plug portion (56), and a shaft portion (58). The header portion (54) is inserted into the valve body (51) to close one end (51a) of the valve body (51) and is pressurized by the oil flowing into the third port (14c). Then, the spool (53) can slide by the pressure of the oil. The plug portion (56) can close the other end (51b) of the valve body (51). When the spool (53) does not slide due to the pressure of the oil, the plug portion (56) closes the other end (51b) of the valve body (51), and when the spool (53) slides, the other end (51b) of the valve body (51) opens. One end of the shaft portion (58) is connected to the header portion (54), and the other end is connected to the plug portion (56). At this time, when the other end (51b) of the valve body (51) is opened and oil flows into the interior of the valve body (51), the diameter of the shaft portion (58) is formed smaller than the inner diameter of the valve body (51) so that a space for oil to flow is formed, allowing the oil to be discharged through the through hole (51c).

[0028] The spring (59) is supported at one end by the header section (54) and at the other end by the valve body (51) so that it can return the spool (53) that has slid by the pressure of the oil. Thus, the pressure of the oil is not applied to the header section (54), and the spool (53) returns, closing the other end (51b) of the valve body (51).

[0029] The rod arm (60) is mounted so as to be rotatable on the vehicle at one end, and the other end is hinge-connected to the other end of the piston rod (43).

[0030] In this embodiment, when the vehicle is operating on land, the ports (14a, 14b, 14c) are closed. When the vehicle is moving, the rod arm (60) rotates counterclockwise due to an external force, and the rod piston (41) advances into the interior of the first cylinder section (21) to pressurize the oil. Then, the oil inside the first cylinder section (21) moves along the passage (25) and flows into the oil chamber section (24a) of the second cylinder section (23). Since the pressure in the first gas chamber section (24b) is low, the first piston (31) is moved first. When the first piston (31) is moved to a limit, the second piston (33) is moved by the hydraulic pressure of the oil. Thus, it has a double spring characteristic and absorbs shock when the vehicle is operating.

[0031] At this time, since the interiors of the first cylinder section (21) and the second cylinder section (23) are filled with oil, the limit to which the rod piston (41) can be inserted into the interior of the first cylinder section (21) is determined. Therefore, since the rotation of the rod arm section (60) is restricted, the wheel cannot be folded. In this case, when the vehicle is operated on water, a lot of resistance is generated.

[0032] When the vehicle enters the water, ports (14a, 14b, 14c) are opened to fold the wheels. The opening of ports (14a, 14b, 14c) can be done manually by the driver.

[0033] At this time, oil is supplied to the third port (14c) and the first port (14a). Hydraulic oil is supplied to the third port (14c) so that a load greater than the elastic force of the spring (59) is applied, and hydraulic oil is supplied to the first port (14a) so that the rod piston (41) can be moved.

[0034] When oil is supplied to the third port (14c), the spool (53) moves, and the other end (51b) of the valve body (51) opens. Then, the oil chamber section (24a) and the second port (14b) are connected to each other. The rod piston (41) is inserted into the interior of the first cylinder section (21) by the oil supplied from the first port (14a) in the direction of arrow X. Thus, the oil contained in the arm cylinder means (20) flows from the oil chamber section (24a) into the valve receiving section (27), moves in the direction of arrow A, and is discharged through the second port (14b). Then, the wheels of the vehicle can be folded. In this case, the oil is discharged from the arm cylinder means (20) and recovered into the vehicle's oil tank.

[0035] And when the vehicle's wheels are unfolded, oil must be supplied from the vehicle's oil tank to the arm cylinder means (20). In this case, instead of pressurizing the oil through the first port (14a), the oil is pressurized through the second port (14b). Then, oil flows into the through hole (51c) of the valve body (51) and moves in the direction of arrow B to be supplied to the oil chamber part (24a). Then, the rod piston (41) moves in the opposite direction.

[0036] Therefore, in the case of this embodiment, opening the ports (14a, 14b, 14c) of the oil conduit means (10) allows the wheels of the vehicle to be folded or unfolded, thereby reducing the resistance generated on the wheels when the vehicle moves in water. Explanation of the symbols

[0037] 1 : Vehicle body 10 : Oil pipeline means 11: Joint 12: One end of the joint 13: Other end of the joint 12a, 12b, 12c: Groove 14a, 14b, 14c: Ports 15: Housing 15a, 15b, 15c : Connecting hole 20 : Female cylinder means 21: First cylinder section 23: Second cylinder section 24a: Oil chamber section 24b: First gas chamber section 24c: Second gas chamber section 25: Flow path 27: Valve receiving part 31: First piston 33: Second piston 40: Rod piston means 41 : Rod piston 43 : Piston rod 45 : Cylinder plug 50 : Lock valve 51: Valve body 51a: One end of the valve body 51b: Other end of valve body 51c: Through hole 53 : Spool 54 : Header section 56 : Stopper part 58 : Shaft part 59 : Spring 60 : Load arm

Claims

Claim 1 An oil pipeline means mounted on the vehicle, having a first port, a second port, and a third port formed therein for receiving oil from the vehicle; a first piston; a second piston; a first cylinder part with one side open; a second cylinder part accommodating the first piston so as to be slidable on one side and the second piston so as to be slidable on the other side; a passage connecting the second cylinder part between the first piston and the second piston with the first cylinder part; a valve receiving part formed therein communicating with the second cylinder part between the first piston and the second piston and communicating with the second port and the third port respectively, and an arm cylinder means mounted so as to be rotatable on the oil pipeline means, having the first cylinder part, the passage, and the second cylinder part between the first piston and the second piston; and oil filled in the second cylinder part between the first piston and the second piston. A first gas capable of being elastically compressible; a second gas capable of being elastically compressible filled inside the second cylinder portion between the second piston and the other end of the second cylinder portion; a rod piston inserted into the first cylinder portion to pressurize the oil; a rod piston means having a piston rod with one end coupled to the rod piston and the other end exposed at an open side of the first cylinder portion; a cylinder plug mounted on the first cylinder portion to support the piston rod so as to slide and to close one side of the first cylinder portion; a locking valve mounted on the valve receiving portion to turn on and off the flow of oil from the second cylinder portion to the second port by the pressure of the oil flowing into the third port; and a rod arm portion having one end mounted so as to be rotatable on the vehicle and the other end hinge-coupled to the other end of the rod piston, wherein the arm cylinder means comprises the rod piston being... by the oil supplied from the first port An arm-type suspension system of a vehicle characterized in that the first cylinder portion between the rod piston and the cylinder plug and the first port are connected so as to be inserted into the first cylinder portion. Claim 2 The arm-type suspension device of a vehicle according to claim 1, wherein the oil conduit means is inserted at one end so as to allow the arm cylinder means to rotate and at the other end is inserted into the vehicle, and a first groove, a second groove, and a third groove are formed annularly along the circumferential direction on the outer surface of the end end and spaced apart at a certain distance in the axial direction, and a joint is formed having a first port communicating with the first groove, a second port communicating with the second groove, and a third port communicating with the third groove. Claim 3 In paragraph 2, the locking valve is characterized by comprising: a valve body that is received in the valve receiving portion, with a through hole formed between the first end and the other end so that one end is in communication with the third port and the other end is in communication with the second cylinder portion, and so that oil flowing into the other end is supplied to the second port; a header portion inserted into the valve body to close one end of the valve body and pressurized by oil flowing into the third port; a plug portion capable of closing the other end of the valve body; a spool inserted to slide inside the valve body, having a shaft portion formed smaller than the inner diameter of the valve body so that the through hole is open, with one end coupled to the header portion and the other end coupled to the plug portion; and a spring that is supported at one end by the header portion and at the other end by the valve body to restore the position of the spool when the spool slides and the other end of the valve body is opened by pressurizing it with the oil.

Images