CN112128302A - Bidirectional action cylinder type shock absorber with small damage - Google Patents

Abstract

The invention discloses a double-acting cylindrical shock absorber with little damage, which includes a wheel, and is characterized in that: the wheel is connected with a wheel connecting rod through a bearing, and a cylindrical shock absorbing device is arranged above the wheel connecting rod, The cylindrical damping device comprises a lower casing welded and installed above the wheel connecting rod, an upper casing is sleeved and installed on the outer side of the lower casing, and a wear-resistant connecting sleeve is fixedly installed on the top of the upper casing. The inner side of the wear-resistant connecting sleeve is slidably connected with a pressure rod, the top end of the pressure rod is fixedly installed with an automobile chassis, the pressure rod penetrates the upper ends of the upper shell and the lower shell, and the lower shell is provided with a partition. oil plate, the side of the oil separator plate adjacent to the lower casing is an outer oil chamber, the side of the oil separator plate adjacent to the pressure rod is an inner oil chamber, and the lower part of the first connecting plate is correspondingly provided with For the second rotating rod, the present invention has the characteristics of rapid shock absorption and low cost.

Description

A double-acting cylindrical shock absorber with little damage

technical field

The invention relates to the technical field of cylindrical shock absorbers, in particular to a double-acting cylindrical shock absorber with little damage.

Background technique

Shock absorbers are mainly divided into two types: hydraulic and pneumatic from the perspective of materials that generate damping, and there is also a variable damping shock absorber. The shock absorber is mainly used to suppress the shock and the impact from the road surface when the spring rebounds after shock absorption. When passing through an uneven road, although the shock-absorbing spring can filter the vibration of the road, the spring itself will have a reciprocating motion, and the shock absorber is used to suppress this spring jump. If the shock absorber is too soft, the body will jump up and down, and if the shock absorber is too hard, it will bring too much resistance and prevent the spring from working properly.

However, the cost of the existing cylindrical shock absorber is too high and the practicability is poor, and at the same time, the existing cylindrical shock absorber is difficult to quickly absorb shock when encountering severe vibration. Therefore, it is necessary to design a double-acting drum shock absorber that can quickly absorb shock and has low cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a double-acting cylindrical shock absorber with little damage, so as to solve the problems raised in the above-mentioned background art.

In order to solve the above technical problems, the present invention provides the following technical solutions: a double-acting cylindrical shock absorber with little damage, including a wheel, characterized in that: the wheel is connected with a wheel connecting rod through a bearing, and the wheel connecting rod is A cylindrical shock absorbing device is arranged above, and the function of the cylindrical shock absorbing device is to buffer shock absorption.

According to the above technical solution, the cylindrical shock absorber includes a lower casing welded and installed above the wheel connecting rod, an upper casing is sleeved and installed on the outer side of the lower casing, and a top end of the upper casing is fixedly installed with a lower casing. Wear-resistant connecting sleeve, the inner side of the wear-resistant connecting sleeve is slidably connected with a pressure rod, and the top of the pressure rod is fixedly installed with a car chassis. When the car is driving on uneven ground, the vibration of the car drives the pressure rod to slide in the lower casing , Wear-resistant connecting sleeve to ensure long-term high-intensity use.

According to the above technical solution, the pressure rod penetrates through the upper ends of the upper casing and the lower casing, an oil separator is arranged inside the lower casing, and the side of the oil separator adjacent to the lower casing is the outer oil chamber , the side of the oil separator plate adjacent to the pressure rod is the inner oil chamber, and the function of the oil separator plate is to separate the oil in the inner oil chamber and the outer oil chamber.

According to the above technical solution, a first annular baffle is fixedly installed in the inner middle of the oil separator, and a second annular baffle is arranged inside the first annular baffle, and the first annular baffle is connected to the second annular baffle. The gap between the baffles is the first oil outlet, the inner side of the second annular baffle is provided with a connecting sleeve, and the gap between the second annular baffle and the connecting sleeve is the second oil outlet, The connecting sleeve is sleeved and installed at the end of the pressure rod, the end of the connecting sleeve is welded and installed with a circular mounting plate, the center of the circular mounting plate is provided with a first screw hole, and the end of the pressure rod is A second screw hole is opened, a first tightening screw is arranged below the first screw hole, a piston is welded and installed below the first tightening screw, and a first rotation is correspondingly arranged below the connecting sleeve rod, an L-shaped connecting rod is installed on the outer side of the first rotating rod, and a first circular rubber pad is fixedly installed on the top of the L-shaped connecting rod, and the size of the first circular rubber pad is larger than that of the second The oil outlet is large, a first connecting rod is correspondingly arranged above the connecting sleeve, a multi-section telescopic rod is welded and installed below the end of the first connecting rod, and a second telescopic rod is fixedly installed below the multi-section telescopic rod. A circular rubber pad, the size of the second circular rubber pad is larger than that of the first oil outlet, and the piston is installed at the end of the pressure rod through the first fastening screw. When the car is driving on uneven ground, the vibration of the car drives the The pressure rod moves up and down. When the pressure rod is pressed down, the L-shaped connecting rod rotates on the first rotating rod, driving the first circular rubber pad to block the second oil outlet, and the multi-section telescopic rod shrinks, driving the second oil outlet. The circular rubber gasket leaves the first oil outlet, making the first oil outlet unobstructed and allowing the hydraulic oil to flow above the piston. When the pressure rod rises, the multi-section telescopic rod extends out, so that the second round rubber gasket blocks the first oil outlet. At the oil outlet, the L-shaped connecting rod drives the first circular rubber pad to leave the second oil outlet, so that the hydraulic oil flows in, and the throttling effect of the oil outlet acts as a damping effect on the extension movement of the pressure rod.

According to the above technical solution, a first fixing block is welded and installed at the inner lower end of the lower casing, a first connecting plate is arranged above the first fixing block, and a third screw hole is opened in the center of the first connecting plate , a second fastening screw is arranged above the third screw hole, a second fixing block is correspondingly arranged on both sides of the first connecting plate, and a second fixing block is opened between the first connecting plate and the second fixing block. Three oil outlets, a chute is provided on the outer side of the second fixing block, a sliding block is slidably connected to the inner side of the chute, and a third circular rubber gasket is fixedly installed on the top of the sliding block. The end of the plate is welded and installed with a third fixing block, the gap between the third fixing block and the second fixing block is the fourth oil outlet, and the size of the third circular rubber gasket is larger than that of the fourth oil outlet , the gap between the lower part of the oil separator and the lower casing is an oil passage tunnel.

According to the above technical solution, a second rotating rod is correspondingly disposed below the first connecting plate, and a first oil baffle is sleeved and installed on the outer side of the second rotating rod. The third oil outlet is large, and the second fastening screw fixes the first connecting plate above the first fixing block through the third screw hole. When the car is driving on the uneven ground, the vibration of the car drives the pressure rod to move up and down. When the rod is compressed, the first gear oil plate rotates around the second rotating rod, so that the third oil outlet is unobstructed, the hydraulic oil flows out from the third oil outlet, and the sliding block slides down in the chute to drive the third round rubber The gasket blocks the fourth oil outlet. When the pressure rod rises, the first oil baffle blocks the third oil outlet, and the sliding block slides in the chute to drive the third circular rubber gasket to block the fourth oil outlet. , so that the hydraulic oil flows in, and the oil in the inner oil chamber and the outer oil chamber replaces each other through the oil passage.

According to the above technical solution, the cylindrical damping device includes an upper casing welded and mounted above the wheel connecting rod, a wear-resistant connecting sleeve is fixedly installed on the top end of the upper casing, and the inner side of the wear-resistant connecting sleeve is slidably connected There is a pressure rod, the top end of the pressure rod is fixedly installed with the chassis of the vehicle, and the end of the pressure rod is fixedly installed with a piston.

According to the above technical solution, the gap between the piston and the upper casing is the fifth oil outlet.

According to the above technical solution, an oil storage chamber is provided on one side of the upper casing, a second connecting plate is welded and installed under the inner side of the upper casing, and two opposite directions are fixedly installed above the second connecting plate. The first oil pass valve and the second oil pass valve.

According to the above technical solution, both the first oil-passing valve and the second oil-passing valve include a first sleeve, the left side of the first sleeve is provided with a first elastic gasket, and the inner side of the first sleeve is provided with a first elastic gasket. A cross fixing frame is fixedly installed in the middle, a through hole is opened in the center of the cross fixing frame, a second connecting rod is slidably installed on the inner side of the through hole, and a second oil baffle is fixedly installed on one side of the second connecting rod , There are corresponding springs on both sides of the second connecting rod. When the pressure rod is compressed, the hydraulic oil pushes the second oil baffle of the first oil pass valve into the oil storage chamber, and the movement of the second oil baffle drives the second connection. The movement of the rod drives the spring to stretch at the same time. When the pressure rod rises and the spring expands and contracts, the oil in the oil storage chamber pushes the second oil-passing valve, and the working process is opposite to the first oil-passing valve.

Compared with the prior art, the beneficial effects achieved by the present invention are: the present invention,

(1) By being provided with a first oil outlet, a second oil outlet, a first circular rubber washer, and a second circular rubber washer, the piston is installed at the end of the pressure rod through the first tightening screw. When the ground is uneven, the vibration of the car drives the pressure rod to move up and down. When the pressure rod is pressed down, the L-shaped connecting rod rotates on the first rotating rod, driving the first circular rubber pad to block the second oil outlet. The multi-section telescopic rod shrinks and drives the second circular rubber washer away from the first oil outlet, making the first oil outlet unobstructed and allowing hydraulic oil to flow above the piston. When the pressure rod rises, the multi-section telescopic rod extends, making the The second circular rubber gasket blocks the first oil outlet, and the L-shaped connecting rod drives the first circular rubber gasket away from the second oil outlet to allow the hydraulic oil to flow in. The throttling effect of the oil outlet prevents the pressure rod from stretching. Play a damping role to meet the requirements of rapid shock absorption;

(2) The first oil baffle, the third oil outlet, the fourth oil outlet, and the third circular rubber gasket are provided, and the second fastening screw fixes the first connecting plate on the first connecting plate through the third screw hole Above the fixed block, when the car is driving on uneven ground, the vibration of the car drives the pressure rod to move up and down. When the pressure rod is compressed, the first oil baffle rotates around the second rotating rod, so that the third oil outlet is unobstructed and the hydraulic pressure The oil flows out from the third oil outlet, and the sliding block slides down in the chute to drive the third circular rubber gasket to block the fourth oil outlet. When the pressure rod rises, the first oil baffle blocks the third outlet. At the same time, the sliding block slides in the chute and drives the third circular rubber gasket to block the fourth oil outlet, so that the hydraulic oil flows in, and the oil in the inner oil chamber and the outer oil chamber is replaced by each other through the oil passage;

(3) By providing the first oil pass valve and the second oil pass valve, when the pressure rod is compressed, the hydraulic oil pushes the second oil baffle of the first oil pass valve into the oil storage chamber, and the movement of the second oil baffle drives the The movement of the second connecting rod drives the spring to stretch at the same time. When the pressure rod rises, the spring expands and contracts, and the oil in the oil storage chamber pushes the second oil-passing valve. The working process is opposite to the first oil-passing valve.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the overall frontal sectional structure schematic diagram of the present invention;

Fig. 2 is the enlarged schematic diagram of part A in Fig. 1 of the present invention;

Fig. 3 is the enlarged schematic diagram of part B in Fig. 1 of the present invention;

Fig. 4 is the sectional structure schematic diagram of the chute of the present invention;

Fig. 5 is the front sectional structure schematic diagram of Embodiment 1 of the present invention;

Fig. 6 is the sectional structure schematic diagram of the oil-pass valve in Embodiment 1 of the present invention;

FIG. 7 is a top-view structural schematic diagram of an oil-passing valve according to an embodiment of the present invention;

In the picture: 1. Wheel; 2. Wheel connecting rod; 3. Oil separator; 4. Inner oil chamber; 5. Outer oil chamber; 6. Lower casing; 7. Upper casing; 8. Wear-resistant connecting sleeve; 9. Pressure rod; 10. Automobile chassis; 11. Second screw hole; 12. Circular mounting plate; 13. First screw hole; 14. First fastening screw; 15. Piston; 16. Connecting sleeve; 17 , the first connecting rod; 18, the multi-section telescopic rod; 19, the second circular rubber gasket; 20, the first annular baffle; 21, the second annular baffle; 22, the first oil outlet; 23, the second oil outlet; 24, L-shaped connecting rod; 25, the first circular rubber gasket; 26, the first rotating rod; 27, the oil tunnel; 28, the first fixing block; 29, the second fastening screw; 30, The first connecting plate; 31, the third oil outlet; 32, the second fixing block; 33, the limit plate; 34, the sliding block; 35, the chute; 36, the third circular rubber gasket; 37, the second rotation rod; 38, the first oil baffle; 39, the fourth oil outlet; 40, the first sleeve; 41, the second connecting rod; 42, the first elastic gasket; 43, the cross bracket; 44, the second Oil baffle; 45, spring; 46, third screw hole; 47, fifth oil outlet; 48, oil storage chamber; 49, second connecting plate; 50, third fixing block.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-7, the present invention provides a technical solution: a double-acting cylindrical shock absorber with little damage, including a wheel 1, characterized in that: the wheel 1 is connected with a wheel connecting rod 2 through a bearing, and the wheel connecting rod 2 is connected to the wheel 1 through a bearing. A cylindrical shock absorbing device is arranged above, and the function of the cylindrical shock absorbing device is to buffer shock absorption;

The cylindrical shock absorber includes a lower casing 6 welded and installed above the wheel connecting rod 2, an upper casing 7 is sleeved and installed on the outer side of the lower casing 6, and a wear-resistant connecting sleeve 8 is fixedly installed on the top of the upper casing 7. The inner side of the wear-resistant connecting sleeve 8 is slidably connected with a pressure rod 9, and the top end of the pressure rod 9 is fixedly installed with an automobile chassis 10. When the automobile is driving on the uneven ground, the vibration of the automobile drives the pressure rod 9 to slide in the lower casing 6, which is resistant to Grinding connecting sleeve 8 ensures long-term high-intensity use;

The pressure rod 9 penetrates the upper ends of the upper casing 7 and the lower casing 6. The lower casing 6 is provided with an oil separator 3. The side adjacent to the oil separator 3 and the lower casing is the outer oil chamber 5. The oil separator 3. The side adjacent to the pressure rod 9 is the inner oil chamber 4, and the function of the oil separator 3 is to separate the oil in the inner oil chamber 4 and the outer oil chamber 5;

A first annular baffle 20 is fixedly installed in the inner middle of the oil separator 3 , a second annular baffle 21 is arranged inside the first annular baffle 20 , and the space between the first annular baffle 20 and the second annular baffle 21 is The gap is the first oil outlet 22, the inner side of the second annular baffle 21 is provided with a connecting sleeve 16, the gap between the second annular baffle and the connecting sleeve 16 is the second oil outlet 23, and the connecting sleeve 16 The sleeve is installed at the end of the pressure rod 9, the end of the connecting sleeve is welded and installed with a circular mounting plate 12, the center of the circular mounting plate 12 is provided with a first screw hole 13, and the end of the pressure rod 9 is provided with a second screw hole 11. A first tightening screw 14 is arranged under the first screw hole 11, a piston 15 is welded and installed under the first tightening screw 14, and a first rotating rod 26 is correspondingly arranged under the connecting sleeve 16. An L-shaped connecting rod 24 is sleeved and installed on the outside of the rod 26, and a first circular rubber washer 25 is fixedly installed on the top of the L-shaped connecting rod 24. The size of the first circular rubber washer 25 is larger than that of the second oil outlet 23. A first connecting rod 17 is correspondingly disposed above the connecting sleeve 16 , a multi-section telescopic rod 18 is welded and installed below the end of the first connecting rod 17 , and a second circular rubber gasket 19 is fixedly installed below the multi-section telescopic rod 18 . The size of the second circular rubber washer 19 is larger than that of the first oil outlet 22, and the piston 15 is installed at the end of the pressure rod 9 through the first fastening screw 14. When the vehicle is driving on uneven ground, the vibration of the vehicle drives the pressure rod 9 moves up and down, when the pressure rod 9 is pressed down, the L-shaped connecting rod 24 rotates on the first rotating rod 26, driving the first circular rubber gasket 25 to block the second oil outlet 23, and the multi-section telescopic rod 18 shrinks , drive the second circular rubber gasket 19 away from the first oil outlet 22, so that the first oil outlet 22 is unblocked, allowing the hydraulic oil to flow into the top of the piston 15, when the pressure rod 9 rises, the multi-section telescopic rod 18 extends, The second circular rubber washer 19 blocks the first oil outlet 22, and the L-shaped connecting rod 24 drives the first circular rubber washer 25 away from the second oil outlet 23 so that hydraulic oil flows in, and the throttling effect of the oil outlet The pressure rod 9 plays a damping role during the stretching movement;

The inner lower end of the lower casing 6 is welded with a first fixing block 28 , a first connecting plate 30 is arranged above the first fixing block 28 , and a third screw hole 46 is opened in the center of the first connecting plate 30 , and the third screw hole A second tightening screw 29 is arranged above the 47 , a second fixing block 32 is correspondingly arranged on both sides of the first connecting plate 30 , and a third oil outlet 31 is opened between the first connecting plate 30 and the second fixing block 32 One side of the second fixing block 32 is fixedly installed with the limiting plate 33, the outer side of the second fixing block 32 is provided with a chute 35, the inner side of the chute 35 is slidably connected with a sliding block 34, and the top of the sliding block 34 is fixedly installed with a first Three circular rubber washers 36, the end of the oil separator 3 is welded with a third fixing block 50, the gap between the third fixing block 50 and the second fixing block 32 is the fourth oil outlet 39, the third circular rubber The size of the gasket 36 is larger than that of the fourth oil outlet 39, and the gap between the lower part of the oil separator 3 and the lower casing 6 is the oil passage 27;

A second rotating rod 37 is correspondingly disposed below the first connecting plate 30 , and a first oil baffle 38 is sleeved and installed on the outer side of the second rotating rod 37 . The size of the first oil baffle 38 is larger than that of the third oil outlet 31 , the second fastening screw 29 fixes the first connecting plate 30 above the first fixing block 28 through the third screw hole 46. When the car is driving on the uneven ground, the vibration of the car drives the pressure rod 9 to move up and down. When the rod 9 is compressed, the first oil baffle 38 rotates around the second rotating rod 37, so that the third oil outlet 31 is unblocked, the hydraulic oil flows out from the third oil outlet 31, and the sliding block 34 slides down in the chute 35. The third circular rubber washer 36 is driven to block the fourth oil outlet 39. When the pressure rod 9 rises, the first oil baffle 38 blocks the third oil outlet 31, and the sliding block 34 slides in the chute 35 to drive The third circular rubber gasket 36 blocks the fourth oil outlet 39 , so that hydraulic oil flows in, and the oil in the inner oil chamber 4 and the outer oil chamber 5 are replaced with each other through the oil passage 27 .

The cylindrical shock absorber includes an upper casing 7 which is welded and installed above the wheel connecting rod 2, a wear-resistant connecting sleeve 8 is fixedly installed on the top of the upper casing 7, and a pressure rod 9 is slidably connected to the inner side of the wear-resistant connecting sleeve 8. The top end of the rod 9 is fixedly installed with an automobile chassis 10, and the end of the pressure rod 9 is fixedly installed with a piston 15;

The gap between the piston 15 and the upper casing 7 is the fifth oil outlet 47;

One side of the upper casing 7 is provided with an oil storage chamber 48 , a second connecting plate 49 is welded and installed under the inner side of the upper casing 7 , and two first oil-passing valves in opposite directions are fixedly installed above the second connecting plate 49 . and the second oil valve;

Both the first oil-passing valve and the second oil-passing valve contain a first sleeve 40 , a first elastic washer 42 is arranged on the left side of the first sleeve 40 , and a cross fixing frame is fixedly installed in the middle of the inner side of the first sleeve 40 43. A through hole is opened in the center of the cross fixing frame 43, a second connecting rod 41 is slidably installed inside the through hole, a second oil baffle 44 is fixedly installed on one side of the second connecting rod 41, and two sides of the second connecting rod 41 are slidably installed. A spring 45 is correspondingly provided on the side. When the pressure rod 9 is compressed, the hydraulic oil pushes the second oil baffle 44 of the first oil pass valve into the oil storage chamber 48, and the movement of the second oil baffle 44 drives the movement of the second connecting rod 41. At the same time, the spring 45 is driven to stretch. When the pressure rod 9 rises, the spring 45 expands and contracts, and the oil in the oil storage chamber 48 pushes the second oil-passing valve, and the working process is opposite to the first oil-passing valve.

Working principle: The function of the cylindrical shock absorber is to buffer shock absorption. When the car is driving on uneven ground, the car vibration drives the pressure rod 9 to slide in the lower casing 6, and the wear-resistant connecting sleeve 8 ensures long-term high-intensity use. The function of the oil separator 3 is to separate the oil in the inner oil chamber 4 and the outer oil chamber 5. The piston 15 is installed at the end of the pressure rod 9 through the first fastening screw 14. When the car is running on uneven ground, The vibration of the automobile drives the pressure rod 9 to move up and down. When the pressure rod 9 is pressed down, the L-shaped connecting rod 24 rotates on the first rotating rod 26, and drives the first circular rubber washer 25 to block the second oil outlet 23. The telescopic rod 18 contracts, and drives the second circular rubber gasket 19 away from the first oil outlet 22, so that the first oil outlet 22 is unblocked, allowing the hydraulic oil to flow into the top of the piston 15. When the pressure rod 9 rises, the multi-section telescopic The rod 18 is extended so that the second circular rubber washer 19 blocks the first oil outlet 22, and the L-shaped connecting rod 24 drives the first circular rubber washer 25 away from the second oil outlet 23 so that the hydraulic oil flows in, and the oil outlet The throttling effect of the pressure rod 9 has a damping effect on the stretching movement of the pressure rod 9. The second fastening screw 29 fixes the first connecting plate 30 above the first fixing block 28 through the third screw hole 46. When the car is on the ground, the vibration of the car drives the pressure rod 9 to move up and down. When the pressure rod 9 is compressed, the first oil baffle 38 rotates around the second rotating rod 37, so that the third oil outlet 31 is unblocked, and the hydraulic oil is discharged from the third outlet. The oil port 31 flows out, and the sliding block 34 slides down in the chute 35 to drive the third circular rubber gasket 36 to block the fourth oil outlet 39. When the pressure rod 9 rises, the first oil baffle 38 blocks the third oil outlet 39. The oil outlet 31, while the sliding block 34 slides in the chute 35 to drive the third circular rubber gasket 36 to block the fourth oil outlet 39, so that the hydraulic oil flows in, and the oil in the inner oil chamber 4 and the outer oil chamber 5 passes through the passage. The oil tunnels 27 are replaced with each other. When the pressure rod 9 is compressed, the hydraulic oil pushes the second oil baffle 44 of the first oil pass valve into the oil storage chamber 48, and the movement of the second oil baffle 44 drives the movement of the second connecting rod 41. At the same time, the spring 45 is driven to stretch. When the pressure rod 9 rises, the spring 45 expands and contracts, and the oil in the oil storage chamber 48 pushes the second oil passage valve. The working process is opposite to the direction of the first oil passage valve.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A double-acting cylindrical shock absorber with little damage, comprising a wheel (1), characterized in that: the wheel (1) is connected with a wheel connecting rod (2) through a bearing, and the wheel connecting rod (2) A cylindrical shock absorber is provided above the . 2. The double-acting cylindrical shock absorber with little damage according to claim 1, wherein the cylindrical shock absorber comprises a lower casing (6) welded and installed above the wheel connecting rod (2). ), an upper casing (7) is installed on the outer side of the lower casing (6), and a wear-resistant connecting sleeve (8) is fixedly installed on the top of the upper casing (7). The inner side of (8) is slidably connected with a pressure rod (9), and the top end of the pressure rod (9) is fixedly mounted with an automobile chassis (10). 3. The double-acting cylindrical shock absorber with little damage according to claim 2, characterized in that: the pressure rod (9) penetrates through the upper ends of the upper casing (7) and the lower casing (6), An oil separator (3) is arranged inside the lower casing (6), and the side of the oil separator (3) adjacent to the lower casing (6) is an outer oil chamber (5). The side of the plate (3) adjacent to the pressure rod (9) is the inner oil chamber (4). 4. The double-acting cylindrical shock absorber with little damage according to claim 3, characterized in that: a first annular baffle (20) is fixedly installed in the inner middle of the oil separator (3), so The inner side of the first annular baffle (20) is provided with a second annular baffle (21), and the gap between the first annular baffle (20) and the second annular baffle (21) is the first oil outlet A port (22), a connecting sleeve (16) is provided on the inner side of the second annular baffle (21), and the gap between the second annular baffle (21) and the connecting sleeve (16) is the second The oil outlet (23), the connecting sleeve (16) is sleeved and installed at the end of the pressure rod (9), the end of the connecting sleeve is welded and installed with a circular mounting plate (12), and the circular installation is The center of the plate (12) is provided with a first screw hole (13), the end of the pressing rod (9) is provided with a second screw hole (11), and a first screw hole (13) is provided below the first screw hole (13). A tightening screw (14), a piston (15) is welded and installed under the first tightening screw (14), a first rotating rod (26) is correspondingly arranged under the connecting sleeve (16), and the An L-shaped connecting rod (24) is sleeved and installed on the outer side of the first rotating rod (26), and a first circular rubber washer (25) is fixedly installed on the top of the L-shaped connecting rod (24). The size of the rubber washer (25) is larger than that of the second oil outlet (23), and a first connecting rod (17) is correspondingly arranged above the connecting sleeve (16). A multi-section telescopic rod (18) is welded and installed below the end, and a second circular rubber washer (19) is fixedly installed under the multi-section telescopic rod (18). The size of the second circular rubber washer (19) Larger than the first oil outlet (22). The double-acting cylindrical shock absorber with little damage according to claim 4, characterized in that: the inner lower end of the lower casing (6) is welded and installed with a first fixing block (28), and the A first connecting plate (30) is arranged above the first fixing block (28), and a third screw hole (46) is opened in the center of the first connecting plate (30), and the third screw hole (46) is provided with a third screw hole (46). A second fastening screw (29) is arranged above, and second fixing blocks (32) are correspondingly arranged on both sides of the first connecting plate (30), and the first connecting plate (30) and the second fixing block ( A third oil outlet (31) is opened between 32), a limit plate (33) is fixedly installed on one side of the second fixing block (32), and a sliding plate (33) is opened on the outer side of the second fixing block (32). a groove (35), a sliding block (34) is slidably connected to the inner side of the sliding groove (35), and a third circular rubber gasket (36) is fixedly installed on the top of the sliding block (34). The end of (3) is welded with a third fixing block (50), and the gap between the third fixing block (50) and the second fixing block (32) is the fourth oil outlet (39). The size of the three circular rubber washers (36) is larger than that of the fourth oil outlet (39), and the gap between the lower part of the oil separator (3) and the lower casing (6) is an oil passage (27). 6 . The double-acting cylindrical shock absorber with little damage according to claim 5 , wherein a second rotating rod ( 37 ) is correspondingly provided below the first connecting plate ( 30 ). A first oil baffle (38) is sleeved and installed on the outer side of the second rotating rod (37), and the size of the first oil baffle (38) is larger than that of the third oil outlet (31). 7. The double-acting cylindrical shock absorber with little damage according to claim 1, characterized in that: the cylindrical shock absorber comprises an upper casing (7) which is welded and installed above the wheel connecting rod (2). ), a wear-resistant connecting sleeve (8) is fixedly installed on the top of the upper casing (7), and a pressure rod (9) is slidably connected to the inner side of the wear-resistant connecting sleeve (8), and the pressure rod (9) A car chassis (10) is fixedly installed on the top end of the pressure rod (9), and a piston (15) is fixedly installed at the end of the pressure rod (9). 8 . The double-acting cylindrical shock absorber with little damage according to claim 7 , wherein the gap between the piston ( 15 ) and the upper casing ( 7 ) is the fifth oil outlet ( 8 . 47). 9. The double-acting cylindrical shock absorber with little damage according to claim 8, wherein an oil storage chamber (48) is provided on one side of the upper casing (7), and the upper casing (7) is provided with an oil storage chamber (48) on one side. A second connecting plate (49) is welded and installed under the inner side of the body (7), and two first oil-passing valves and second oil-passing valves in opposite directions are fixedly installed above the second connecting plate (49). 10. The double-acting cylindrical shock absorber with little damage according to claim 9, wherein the first oil-passing valve and the second oil-passing valve both contain a first sleeve (40), so A first elastic gasket (42) is arranged on the left side of the first sleeve (40), a cross fixing frame (43) is fixedly installed on the inner middle of the first sleeve (40), and the cross fixing frame ( 43) is provided with a through hole in the center, a second connecting rod (41) is slidably installed on the inside of the through hole, and a second oil baffle (44) is fixedly installed on one side of the second connecting rod (41). Springs (45) are correspondingly arranged on both sides of the second connecting rod (41).

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