CN220828468U - Damping shock absorber and wheelbarrow - Google Patents

Abstract

The utility model discloses a damping shock absorber and a monocycle, wherein the damping shock absorber comprises an oil hydraulic cylinder, a piston rod, a fixed seat, a spring and a floating oil cylinder, damping oil is arranged in the oil hydraulic cylinder, one end of the piston rod is fixedly connected with the fixed seat, the other end of the piston rod is connected with the oil hydraulic cylinder in a sliding manner, a piston head is arranged at one end of the piston rod, which is positioned in the oil hydraulic cylinder, and the piston head divides the oil hydraulic cylinder into a first oil chamber and a second oil chamber; the floating oil cylinder is internally provided with a floating oil plug, the floating oil plug divides the floating oil cylinder into an air chamber and a third oil chamber, the third oil chamber is communicated with the first oil chamber and the second oil chamber through a fixed seat, the volume of the first oil chamber is relatively reduced in the compression process, damping oil in the first oil chamber partially flows into the second oil chamber, the damping oil partially flows into the third oil chamber of the floating oil cylinder through a piston rod, the spring is compressed by the oil cylinder and the fixed seat, the flow rate of the damping oil is accelerated due to the increase of a flow path, the response time of the state change of the damping shock absorber is shortened, the shock absorption effect is further enhanced, and the use experience of a user is improved.

Description

Damping shock absorber and wheelbarrow

Technical Field

The utility model relates to the field of electric wheelbarrows, in particular to a damping shock absorber and a wheelbarrow.

Background

The shock absorber is a common locomotive spare and accessory part. The shock absorber is required to absorb shock caused by the road surface with concave and convex surface when the wheels meet due to the fact that the springs cannot be stabilized immediately after deformation and can be repeatedly compressed and relaxed for a period of time, so that riding is comfortable.

The conventional shock absorber generally comprises a pressure cylinder fixedly connected to a vehicle body, wherein damping oil with high viscosity is contained in the pressure cylinder, a piston is arranged in the pressure cylinder, one end of the pressure cylinder is penetrated by a connecting rod, one end of the connecting rod is fixedly connected to a wheel frame of a wheel, the other end of the connecting rod is fixedly connected with the piston in the pressure cylinder, and a spring is sleeved outside the connecting rod. When the vehicle encounters a concave-convex road surface or a brake, the vehicle body can drive the piston through the connecting rod to compress damping oil in the pressure cylinder, so that a buffer effect is obtained.

However, the damping oil has insufficient flow paths and slow flow rate, and when encountering a severely bumpy road section, the damping oil has insufficient buffering degree and poor damping effect, and the user experience is poor.

Disclosure of utility model

In order to overcome at least one of the above-mentioned drawbacks of the prior art, the present utility model provides a damping shock absorber and wheelbarrow with sufficient flow paths and adjustable flow rate.

The utility model adopts the technical proposal for solving the problems that:

In a first aspect, the present utility model provides a damped shock absorber comprising:

the hydraulic cylinder is internally provided with damping oil;

The piston rod is connected with one end of the oil hydraulic cylinder in a sliding way;

the floating oil cylinder is communicated with the oil pressure cylinder through the piston rod;

The fixed seat is fixedly connected with one end, far away from the oil hydraulic cylinder, of the piston rod, and the floating oil cylinder is also fixedly connected with the fixed seat;

One end of the spring is fixedly connected with the fixed seat, and the other end of the spring is movably connected with the oil hydraulic cylinder;

A piston head is arranged at one end of the piston rod, which is positioned at the oil hydraulic cylinder, the piston head divides the oil hydraulic cylinder into two oil chambers, the oil chamber far away from the fixing seat is defined as a first oil chamber, and the oil chamber close to the fixing seat is defined as a second oil chamber;

A floating oil plug is arranged in the floating oil cylinder, the floating oil plug divides the floating oil cylinder into an air chamber and a third oil chamber, and the third oil chamber is communicated with the first oil chamber and the second oil chamber through the fixing seat;

When the oil pressure cylinder slides towards the fixing seat, damping oil in the first oil chamber flows into the second oil chamber and the third oil chamber through the piston rod.

Through the arrangement, in the compression process of the damping shock absorber, the oil pressure cylinder slides towards the fixed seat, the position of the piston head is unchanged, namely the volume of the first oil chamber is relatively reduced, damping oil in the damping shock absorber partially flows into the second oil chamber, the damping oil partially flows into the third oil chamber of the floating oil cylinder through the piston rod, the spring is compressed by the oil pressure cylinder and the fixed seat, the flow rate of the damping oil is accelerated due to the increase of the flow path, the response time of the state change of the damping shock absorber is shortened, the shock absorbing effect is further enhanced, and the use experience of a user is improved.

According to a preferred embodiment, the piston rod comprises a first connecting tube and a second connecting tube, both the first connecting tube and the second connecting tube are configured to be penetrated, and one of the first connecting tube and the second connecting tube is sleeved on the other.

According to a preferred embodiment, the piston rod further comprises a rebound damping valve, the rebound damping valve housing being provided to the piston head;

The rebound damping valve comprises a pressing oil passing hole, the pressing oil passing hole is communicated with the first oil chamber and the second oil chamber, a rebound oil sealing piece is arranged in the pressing oil passing hole, and the rebound oil sealing piece controls damping oil of the first oil chamber and the second oil chamber to flow unidirectionally.

According to a preferred embodiment, the inner through portion of the one of the first connecting pipe and the second connecting pipe located on the inner side is defined as a first oil passage, the inner through portion of the one of the outer sides and the outer wall of the one of the inner sides form a second oil passage, and the first oil passage and the second oil passage are not directly communicated.

According to a preferred embodiment, the fixing seat is provided with an internal oil passage, and the internal oil passage communicates with the first oil passage and the second oil passage.

According to a preferred embodiment, the floating cylinder comprises a base, and the base is fixedly connected with the fixing seat or integrally formed;

the base is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively communicated with the inner oil way.

According to a preferred embodiment, the damping device further comprises a lower pressure damping assembly, the lower pressure damping assembly comprises a lower pressure damping knob and a limiting piece, the lower pressure damping knob is movably connected to the fixing seat, and the limiting piece is in clamping connection with the lower pressure damping knob.

According to a preferred embodiment, the lower pressure damping knob comprises an oil passing portion, and the oil passing portion is communicated with the fixing seat and the floating cylinder.

In a second aspect, the utility model also provides a wheelbarrow comprising a damping shock absorber as described above.

In summary, the damping shock absorber and the monocycle provided by the utility model have at least the following technical effects:

In the compression process of the damping shock absorber, the oil pressure cylinder slides towards the fixed seat, the position of the piston head is unchanged, namely the volume of the first oil chamber is relatively reduced, damping oil in the damping shock absorber partially flows into the second oil chamber, the damping oil partially flows into the third oil chamber of the floating oil cylinder through the piston rod, the spring is compressed by the oil pressure cylinder and the fixed seat, the flow rate of the damping oil is accelerated due to the increase of the flow path, the response time of the state change of the damping shock absorber is shortened, the shock absorption effect is further enhanced, and the use experience of a user is improved.

Drawings

FIG. 1 is a perspective view of a damping shock absorber according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1;

FIG. 3 is an enlarged schematic view of portion B of FIG. 2;

FIG. 4 is an enlarged schematic view of portion C of FIG. 2;

FIG. 5 is a cross-sectional view of a compressed state of a damping shock absorber according to an embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of portion D of FIG. 5;

FIG. 7 is a perspective view of a lower pressure damping assembly according to an embodiment of the present utility model.

Wherein the reference numerals have the following meanings:

1-an oil hydraulic cylinder; 11-threading; 12-oil pressure cylinder cover; 13-a first oil chamber; 14-a second oil chamber; 2-a piston rod; 21-a first connecting tube; 22-a second connecting tube; 221-an oil outlet hole; 23-a first oil path; 24-a second oil path; 25-piston heads; 26-rebound damping valve; 261-pressing down the oil passing hole; 262-rebound oil seal; 3-fixing seats; 31-an inner oil path; 4-a spring; 41-positioning ring; 5-floating oil cylinder; 51-air tap; 52-floating oil plugs; 53-base; 531-oil inlet; 532-oil outlet; 533-accommodating groove; 54-air chambers; 55-a third oil chamber; 6-rebound damping knob; 61-buffer stopper; 7-a lower pressure damping assembly; 71-lower pressure damping knob; 711-rotating part; 712-limit grooves; 713-an oil passing portion; 72-limiting piece; 8-a one-way oil supplementing valve; 81-a fixing part; 82-a reset element; 83-a movable ball.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are referred to, the positional relationship is based on the positional relationship shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

Further, in the description of the present utility model, it should be understood that the terms "upper", "lower", "inner", "outer", and the like are described with reference to the angle shown in the drawings, and should not be construed as limiting the specific embodiments. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

Referring to fig. 1 and 2, the utility model discloses a damping shock absorber, which comprises an oil cylinder 1, a piston rod 2, a fixed seat 3, a spring 4 and a floating oil cylinder 5, wherein damping oil is arranged in the oil cylinder 1, one end of the piston rod 2 is fixedly connected with the fixed seat 3, the other end of the piston rod is slidably connected with the oil cylinder 1, one end of the spring 4 is fixedly connected with the fixed seat 3, the other end of the spring is movably connected with the oil cylinder 1 and can be positioned on the oil cylinder 1, one end of the piston rod 2 positioned in the oil cylinder 1 is provided with a piston head 25, the piston head 25 divides the oil cylinder 1 into two oil chambers, an oil chamber far away from the fixed seat 3 is defined as a first oil chamber 13, and an oil chamber close to the fixed seat 3 is defined as a second oil chamber 14; the floating oil cylinder 5 is internally provided with the floating oil plug 52, the floating oil plug 52 divides the floating oil cylinder 5 into the air chamber 54 and the third oil chamber 55, the third oil chamber 55 is communicated with the first oil chamber 13 and the second oil chamber 14 through the fixing seat 3, when the damping shock absorber is extruded to shrink, the oil pressure cylinder 1 slides towards the fixing seat 3, the position of the piston head 25 is unchanged, namely the volume of the first oil chamber 13 is relatively reduced, damping oil in the oil pressure cylinder partially flows into the second oil chamber 14, the damping oil partially flows into the third oil chamber 55 of the floating oil cylinder 5 through the piston rod 2, the spring 4 is compressed by the oil pressure cylinder 1 and the fixing seat 3, the flow rate of the damping oil is accelerated due to the increase of a flow path, the response time of the state change of the damping shock absorber is shortened, the damping effect is further enhanced, and the use experience of a user is improved.

Further, one end of the oil hydraulic cylinder 1, which is close to the piston rod 2, is provided with an oil hydraulic cylinder 1 cover, the oil hydraulic cylinder 1 cover is detachably connected with the oil hydraulic cylinder 1, and the piston rod 2 is penetrated and slidably connected with the oil hydraulic cylinder 1 cover; the surface of the oil hydraulic cylinder 1 is provided with threads 11, one end of the spring 4, which is close to the oil hydraulic cylinder 1, is provided with a positioning ring 41, the positioning ring 41 is connected with the threads 11 of the oil hydraulic cylinder 1, and the compression amount of the spring 4 can be adjusted by adjusting the position of the positioning ring 41 on the threads 11, so that the maximum buffering force of the shock absorber in the embodiment is adjusted.

Specifically, referring to fig. 3, the piston rod 2 includes a first connecting tube 21 and a second connecting tube 22, where the first connecting tube 21 and the second connecting tube 22 are configured to be penetrated, and one of the first connecting tube 21 and the second connecting tube 22 is sleeved on the other, so that the space utilization rate of the piston rod 2 is increased under the condition that the space occupied by the whole structure is not increased; the piston rod 2 further comprises a rebound damping valve 26, and the rebound damping valve 26 is sleeved on the piston head 25; the rebound damping valve 26 includes a pressing oil passing hole 261, the pressing oil passing hole 261 communicates with the first oil chamber 13 and the second oil chamber 14, a rebound oil sealing piece 262 is arranged in the pressing oil passing hole 261, the rebound oil sealing piece 262 controls damping oil in the first oil chamber 13 and the second oil chamber 14 to flow unidirectionally, in this embodiment, the first connecting tube 21 is one located at the inner side, the second connecting tube 22 is sleeved outside the first connecting tube 21, a part penetrating the inner wall of the first connecting tube 21 is defined as a first oil path 23, a second oil path 24 is formed by the part penetrating the inner wall of the second connecting tube 22 and the outer wall of the first connecting tube 21, when the oil cylinder 1 moves towards the fixed seat 3, namely, when the piston rod 2 moves relatively towards the direction of the oil cylinder 1, the volume of the first oil chamber 13 is reduced, the piston head 25 compresses damping oil in the first oil chamber 13, part of the damping oil flows into the fixed seat 3 through the first oil path 23, then flows into a third oil chamber 55 of the oil cylinder 5, the volume of the third oil chamber 55 is enlarged, and the volume of the air chamber 54 is reduced; part of the damping oil pushes up the rebound oil sealing piece 262 and directly flows into the second oil chamber 14 through the oil pressing hole 261, in the process, the spring 4 is compressed as shown in fig. 5, and the oil pressure of the damping oil is gradually balanced with the elasticity of the spring 4; after the spring 4 reaches the limit compression amount, the spring 4 changes from compression to expansion, the second connecting tube 22 is provided with an oil outlet 221, the oil outlet 221 is communicated with the second oil chamber 14 and the second oil path 24, damping oil in the second oil chamber 14 cannot directly flow into the first oil chamber 13 due to the arrangement of the rebound oil sealing piece 262, damping oil in the damping oil can only flow into the third oil chamber 55 through the second oil path 24, and then the damping oil in the third oil chamber 55 directly returns to the first oil chamber 13 through the first oil path 23.

Further, referring to fig. 4, an inner oil path 31 is provided in the fixing base 3, and the inner oil path 31 communicates with the first oil path 23 and the second oil path 24; the floating cylinder 5 comprises an air tap 51, a floating oil plug 52 and a base 53, the air tap 51 is communicated with the atmosphere, the air chamber 54 is a region between the air tap 51 and the floating oil plug 52, the third oil chamber 55 is a region between the floating oil plug 52 and the base 53, the base 53 is provided with an oil inlet 531 and an oil outlet 532, and the oil inlet 531 and the oil outlet 532 are respectively communicated with the inner oil path 31; the damping shock absorber of the embodiment further comprises a one-way oil supplementing valve 8, the one-way oil supplementing valve 8 is inserted into the fixed seat 3, the one-way oil supplementing valve 8 comprises a fixed part 81, a reset piece 82 and a movable ball 83, the fixed part 81 is inserted into an oil outlet 532, the movable ball 83 and the inner wall of the fixed part 81 are in clearance fit, namely, the movable ball 83 can move relative to the fixed part 81, the diameter of the movable ball 83 is larger than that of the oil outlet 532, one end of the reset piece 82 is connected with the movable ball 83, the other end of the reset piece 82 is connected with the fixed part 81, the reset piece 82 in the embodiment adopts a reset spring 4, and when damping oil in an inner oil way 31 enters a third oil chamber 55 in a compressed state between the movable ball 83 and the fixed part 81, the reset piece 82 supports the movable ball 83 to the oil outlet 532, and the damping oil cannot bypass the movable ball 83 to enter the third oil chamber 55, and can only enter the oil inlet 531; when the damping oil in the third oil chamber 55 enters the inner oil path 31, the damping oil can enter through the oil inlet 531, if the pressure of the damping oil is greater than the elastic force of the resetting piece 82, the damping oil can jack the movable ball 83, and the damping oil simultaneously flows to the inner oil path 31 from the oil inlet 531 and the oil outlet 532.

It can be appreciated that the base 53 and the fixing base 3 are fixedly connected, and may be configured as an integral molding, and the effects are the same, so that additional description is omitted herein.

Referring to fig. 7 together, the damping shock absorber of the present embodiment further includes a lower damping component 7, where the lower damping component 7 includes a lower damping knob 71 and a limiting member 72, the lower damping knob 71 is movably connected to the fixing base 3, and the limiting member 72 is snap-connected to the lower damping knob 71; the base 53 is provided with the accommodating groove 533, the limiting piece 72 is arranged in the accommodating groove 533, the lower damping knob 71 comprises a rotating part 711, a limiting groove 712 and an oil passing part 713, wherein the rotating part 711 protrudes out of the fixing seat 3, a coarser grain is arranged on the rotating part 711 and is convenient for a user to twist, the limiting groove 712 is connected with the limiting piece 72 in a clamping manner, the oil passing part 713 is inserted into the inner oil way 31 and is used for controlling the oil inlet speed of the oil inlet 531, the oil passing part 713 is configured into a conical shape or a circular truncated cone shape, and thus, the size of the lower damping knob 71 in the fixing seat 3 is changed by adjusting the gap between the inner oil way 31 and the oil passing part 713, and the speed of damping oil flowing through the oil inlet 531 is changed.

Further, referring to fig. 5 and 6, the damping damper of the present embodiment further includes a rebound damping knob 6, the rebound damping knob 6 is movably connected to the fixing base 3, a buffer plug 61 is disposed between the first oil path 23 and the rebound damping knob 6, the position of the buffer plug 61 relative to the first connecting tube 21 can be adjusted by adjusting the size of the rebound damping knob 6 in the fixing base 3, and further, the speed of the damping oil flowing into the inner oil path 31 from the piston rod 2 is adjusted, and the buffer plug 61 can also play a sealing role.

Defining that the distance between the hydraulic cylinder 1 and the fixed seat 3 is in a diastole state when the damping shock absorber in the embodiment is subjected to external force, when the damping shock absorber is converted from the diastole state to a compression state, namely, when the damping shock absorber is converted from fig. 2 to fig. 5, the flow direction of damping oil is shown by an arrow in fig. 5, when the hydraulic cylinder 1 slides towards the fixed seat 3, the damping oil in the first oil chamber 13 flows into the third oil chamber 55 through the first oil path 23, the inner oil path 31 and the oil inlet 531, and flows into the second oil chamber 14 through the rebound damping valve 26, and the spring 4 between the fixed seat 3 and the hydraulic cylinder 1 is compressed; when the elastic force and the internal oil pressure are balanced, the state of the hydraulic cylinder is changed from the state of fig. 5 to the state of fig. 2, the spring 4 drives the hydraulic cylinder 1 to move towards the direction away from the fixed seat 3, the cover of the hydraulic cylinder 1 presses damping oil in the second oil chamber 14 to the inner oil path 31 and the third oil chamber 55 of the floating cylinder 5 through the second oil path 24, and the damping oil in the third oil chamber 55 enters the first oil path 23 through the oil inlet 531 and the oil outlet 532 and returns to the first oil chamber 13 again to be in a diastole state; the floating cylinder 5 has an oil storage function in a compressed state and has an oil supplementing function in a relaxed state.

On the other hand, the utility model also provides a wheelbarrow which comprises a wheel assembly and a frame assembly, wherein one end of the damping shock absorber is directly or indirectly connected with the wheel assembly, and the other end of the damping shock absorber is directly or indirectly connected with the frame assembly, so that the wheelbarrow has a good shock absorption effect.

In summary, the damping shock absorber and the monocycle provided by the utility model have at least the following technical effects:

In the compression process of the damping shock absorber, the oil hydraulic cylinder 1 slides towards the fixed seat 3, the position of the piston head 25 is unchanged, namely the volume of the first oil chamber 13 is relatively reduced, damping oil in the damping shock absorber partially flows into the second oil chamber 14, the damping oil partially flows into the third oil chamber 55 of the floating oil cylinder 5 through the piston rod 2, the spring 4 is compressed by the oil hydraulic cylinder 1 and the fixed seat 3, the flow rate of the damping oil is accelerated due to the increase of the flow path, the response time of the state change of the damping shock absorber is shortened, the shock absorbing effect is further enhanced, and the use experience of a user is improved.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. A damped shock absorber, comprising:

The hydraulic device comprises an oil pressure cylinder (1), wherein damping oil is arranged in the oil pressure cylinder (1);

The piston rod (2), one end of the piston rod (2) is connected with the oil hydraulic cylinder (1) in a sliding way;

A floating cylinder (5), wherein the floating cylinder (5) is communicated with the oil pressure cylinder (1) through the piston rod (2);

The fixed seat (3), one end of the piston rod (2) far away from the oil hydraulic cylinder (1) is fixedly connected with the fixed seat (3), and the floating cylinder (5) is also fixedly connected with the fixed seat (3);

One end of the spring (4) is fixedly connected with the fixed seat (3), and the other end of the spring is movably connected with the oil pressure cylinder (1);

A piston head (25) is arranged at one end of the piston rod (2) positioned on the oil hydraulic cylinder (1), the piston head (25) divides the oil hydraulic cylinder (1) into two oil chambers, an oil chamber far away from the fixed seat (3) is defined as a first oil chamber (13), and an oil chamber close to the fixed seat (3) is defined as a second oil chamber (14);

a floating oil plug (52) is arranged in the floating oil cylinder (5), the floating oil plug (52) divides the floating oil cylinder (5) into an air chamber (54) and a third oil chamber (55), and the third oil chamber (55) is communicated with the first oil chamber (13) and the second oil chamber (14) through the fixing seat (3);

When the hydraulic cylinder (1) slides towards the fixed seat (3), damping oil in the first oil chamber (13) flows into the second oil chamber (14) and the third oil chamber (55) through the piston rod (2).

2. A damped shock absorber according to claim 1, wherein: the piston rod (2) comprises a first connecting pipe (21) and a second connecting pipe (22), the first connecting pipe (21) and the second connecting pipe (22) are all configured to be communicated, and one of the first connecting pipe (21) and the second connecting pipe (22) is sleeved with the other.

3. A damped shock absorber according to claim 1, wherein: the piston rod (2) further comprises a rebound damping valve (26), and the rebound damping valve (26) is sleeved on the piston head (25);

The rebound damping valve (26) comprises a pressing oil passing hole (261), the pressing oil passing hole (261) is communicated with the first oil chamber (13) and the second oil chamber (14), a rebound oil sealing piece (262) is arranged in the pressing oil passing hole (261), and the rebound oil sealing piece (262) controls damping oil of the first oil chamber (13) and the second oil chamber (14) to flow unidirectionally.

4. A damped shock absorber according to claim 2, wherein: defining the inner through part of the first connecting pipe (21) and the second connecting pipe (22) positioned on the inner side as a first oil path (23), wherein the inner through part of the first connecting pipe positioned on the outer side and the outer wall of the first connecting pipe positioned on the inner side form a second oil path (24), and the first oil path (23) and the second oil path (24) are not directly communicated.

5. The damped shock absorber according to claim 4, wherein: the fixing seat (3) is provided with an inner oil way (31), and the inner oil way (31) is communicated with the first oil way (23) and the second oil way (24).

6. A damped shock absorber according to claim 5, wherein: the floating oil cylinder (5) comprises a base (53), and the base (53) is fixedly connected with the fixed seat (3) or integrally formed;

The base (53) is provided with an oil inlet (531) and an oil outlet (532), and the oil inlet (531) and the oil outlet (532) are respectively communicated with the inner oil way (31).

7. A damped shock absorber according to claim 1, wherein: the damping device comprises a fixed seat (3), and is characterized by further comprising a lower pressure damping assembly (7), wherein the lower pressure damping assembly (7) comprises a lower pressure damping knob (71) and a limiting piece (72), the lower pressure damping knob (71) is movably connected with the fixed seat (3), and the limiting piece (72) is connected with the lower pressure damping knob (71) in a clamping mode.

8. A damped shock absorber according to claim 7, wherein: the lower pressure damping knob (71) comprises an oil passing part (713), and the oil passing part (713) is communicated with the fixed seat (3) and the floating cylinder (5).

9. A wheelbarrow, characterized by: a damping shock absorber comprising a damping device as claimed in any one of claims 1 to 8.

10. A wheelbarrow according to claim 9, wherein: the wheelbarrow comprises a wheel assembly and a frame assembly, one end of the damping shock absorber is directly or indirectly connected with the wheel assembly, and the other end of the damping shock absorber is directly or indirectly connected with the frame assembly.