CN210261007U - Hydraulic system of auxiliary vehicle of side stand machine and auxiliary vehicle of side stand machine - Google Patents

Abstract

The utility model discloses a hydraulic system and the upright quick-witted auxiliary vehicle of inclining of quick-witted auxiliary vehicle, wherein, the hydraulic system of the upright quick-witted auxiliary vehicle of inclining includes: an oil tank; a two-position three-way valve; the oil inlet pipeline is communicated with the two-position three-way valve and the oil tank, and is also provided with a one-way valve which is positioned between the two-position three-way valve and the oil tank and is communicated in a one-way mode along the direction from the oil tank to the two-position three-way valve; the oil outlet pipeline is communicated with the two-position three-way valve and the oil tank; the main pipeline is communicated with the single-action oil cylinder and the two-position three-way valve; the two-position three-way valve is communicated with the main pipeline and the oil inlet pipeline; the two-position three-way valve is communicated with the main pipeline and the oil outlet pipeline. The utility model discloses technical scheme makes this hydraulic system's the quick-witted auxiliary vehicle that stands on side simple structure, and operation process is simple, and the work fill of the quick-witted auxiliary vehicle that stands on side can descend by self gravity.

Description

Hydraulic system of auxiliary vehicle of side stand machine and auxiliary vehicle of side stand machine

Technical Field

The utility model relates to a construction equipment technical field, in particular to hydraulic system of side machine auxiliary vehicle and applied this hydraulic system's side machine auxiliary vehicle that stands.

Background

During the production and installation process, the prefabricated parts are usually required to be transported from one place to another for storage or installation. Most bulky of prefabricated component, and weight is heavier, need utilize the side to stand the machine and overturn the prefabricated component, and the hoist on the rethread driving is hung in the prefabricated component, transports the prefabricated component assigned position. Because the prefabricated component is by the upset back, the hoisting point of prefabricated component is higher, need utilize the side to found quick-witted auxiliary vehicle and transport staff to higher position, and the staff will go up hoist hook on the driving to the hoisting point of prefabricated component. In the related art, an auxiliary vehicle for transporting workers has poor working stability, may bring danger of injury to the workers, and has a complex structure.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hydraulic system of standing on one's side quick-witted auxiliary vehicle aims at making this hydraulic system's the standing on one's side quick-witted auxiliary vehicle simple structure, and job stabilization nature is good.

In order to achieve the above object, the utility model provides a hydraulic system of standing quick-witted auxiliary vehicle inclines, include:

an oil tank;

a two-position three-way valve;

the oil inlet pipeline is communicated with the two-position three-way valve and the oil tank, and is also provided with a one-way valve which is positioned between the two-position three-way valve and the oil tank and is communicated in a one-way mode along the direction from the oil tank to the two-position three-way valve;

the oil outlet pipeline is communicated with the two-position three-way valve and the oil tank; and

the single-acting oil cylinder and the main pipeline are communicated with each other;

the two-position three-way valve is communicated with the main pipeline and the oil inlet pipeline; or the two-position three-way valve is communicated with the main pipeline and the oil outlet pipeline.

Optionally, the single-acting cylinder includes a cylinder body and a reciprocating rod, the reciprocating rod is partially accommodated in the cylinder body to divide the cylinder body into a rodless cavity and a rod cavity, and the main pipeline communicates the rodless cavity and the two-position three-way valve.

Optionally, the single-acting cylinder further comprises an elastic member, and the elastic member elastically abuts against the cylinder body and the reciprocating rod in the rod cavity.

Optionally, the oil inlet pipeline includes a first pipeline and an oil pump, one end of the first pipeline is communicated with the two-position three-way valve, the other end of the first pipeline is communicated with the oil tank, the oil pump and the check valve are both connected in series with the first pipeline, and the check valve is located between the two-position three-way valve and the oil pump;

the hydraulic system further comprises a second pipeline, one end of the second pipeline is communicated with the first pipeline and is located between the one-way valve and the oil pump, the other end of the second pipeline is communicated with the oil tank, and an overflow valve is connected to the second pipeline in series.

Optionally, the oil inlet pipeline further comprises a filter, and the filter is connected in series with the first pipeline and is located between the oil pump and the oil tank.

Optionally, the oil outlet pipeline comprises a third pipeline and a speed regulating valve, one end of the third pipeline is communicated with the two-position three-way valve, the other end of the third pipeline is communicated with the oil tank, and the speed regulating valve is connected in series with the third pipeline.

Optionally, the two-position three-way valve is a two-position three-way solenoid valve.

Optionally, the hydraulic system includes a plurality of the single-acting cylinders, and the plurality of single-acting cylinders are connected in parallel and then connected in series to the main pipeline.

The utility model also provides a machine auxiliary vehicle stands to side, the machine auxiliary vehicle stands to side includes:

a frame;

a working bucket; and

a hydraulic system of the auxiliary vehicle of the side-standing machine;

the hydraulic system of the auxiliary vehicle of the side stand machine comprises:

an oil tank;

a two-position three-way valve;

the oil inlet pipeline is communicated with the two-position three-way valve and the oil tank, and is also provided with a one-way valve which is positioned between the two-position three-way valve and the oil tank and is communicated in a one-way mode along the direction from the oil tank to the two-position three-way valve;

the oil outlet pipeline is communicated with the two-position three-way valve and the oil tank; and

the single-acting oil cylinder and the main pipeline are communicated with each other;

the two-position three-way valve is communicated with the main pipeline and the oil inlet pipeline; or the two-position three-way valve is communicated with the main pipeline and the oil outlet pipeline;

and a single-acting oil cylinder of the hydraulic system is connected with the frame and the working bucket and drives the working bucket to ascend and descend along the frame.

Optionally, the frame comprises:

a vehicle body; and

the supporting frame is rotatably connected to the vehicle body and can be kept fixed relative to the vehicle body; or the support frame is fixed on the vehicle body and is parallel to the prefabricated part on the side erecting machine;

and a single-acting oil cylinder of the hydraulic system is connected with the support frame and the working bucket and drives the working bucket to ascend and descend along the support frame.

The utility model discloses among the technical scheme, the ascending in-process of work fill on the hydraulic system drive side founds quick-witted auxiliary vehicle, control two-position three-way valve intercommunication main line and advance the oil pipe way, fluid in the oil tank is in proper order through advancing oil pipe way, two-position three-way valve and main line, carries to the single-action hydro-cylinder in, and the single-action hydro-cylinder drives work fill and rises, and work fill drives the staff and rises to the assigned position. When the staff carries out the operation at the eminence, hydraulic drive system stop work, because the check valve on the oil inlet pipeline only switches on to two-position three-way valve direction along the oil tank, and can not reverse the switch-on, the single action hydro-cylinder can make the work fill keep high-order and do not descend, can guarantee that the staff carries out the operation at the high-order, the whereabouts phenomenon can not appear. The working bucket on the auxiliary vehicle of the side-standing machine controls the two-position three-way valve to communicate with the main pipeline and the oil outlet pipeline in the descending process, the working bucket can enable the single-action oil cylinder to move reversely under the action of gravity, oil in the single-action oil cylinder flows back to the oil tank through the main pipeline, the two-position three-way valve and the oil outlet pipeline in sequence, and a working bucket carries workers to descend to a specified position. The two-position three-way valve is combined with the single-action oil cylinder, so that the working bucket does not need driving force in the descending process, and the descending action can be realized only under the action of self gravity, so that the hydraulic system is simple to operate, and the energy consumption of the hydraulic system can be saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of the auxiliary vehicle of the side stand machine of the present invention;

FIG. 2 is a schematic structural view of a side stand machine;

FIG. 3 is a schematic view of an embodiment of a hydraulic system of the auxiliary vehicle of the present invention;

fig. 4 is a schematic diagram of another embodiment of the hydraulic system of the auxiliary vehicle for a side stand machine according to the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Hydraulic system	80	Main pipeline
10	Oil tank	90	Single-acting oil cylinder
				30	Two-position three-way valve	91	Cylinder body
50	Oil inlet pipeline	92	Cavity with rod
				51	First pipeline	93	Reciprocating lever
53	Oil pump	94	Rodless cavity
				55	One-way valve	95	Elastic piece
57	Filter	200	Auxiliary vehicle for side stand machine
				60	Pressure regulating pipeline	201	Vehicle frame
61	Second pipeline	2011	Vehicle body
				63	Overflow valve	2013	Supporting frame
70	Oil outlet pipeline	203	Working bucket
				71	Third pipeline	300	Side standing machine
73	Speed regulating valve	301	Prefabricated component

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 and 2, the technical solution of the present invention is mainly to improve the auxiliary vehicle of the side stand machine 300. The auxiliary vehicle 200 for the side-standing machine comprises a frame 201 and a working bucket 203, a worker enters the working bucket 203, the working bucket 203 is driven by a hydraulic system 100 to move up under the support of the frame 201, and when the working bucket 203 rises to a specified position, the worker can manually operate to hook a lifting appliance on a travelling crane on a hook or a hanging ring of a prefabricated part 301. After the operation of the worker is completed, under the action of the hydraulic system 100, the working bucket 203 performs descending motion under the support of the frame 201, and the working bucket 203 loaded with the worker is transported to a safe position for the worker to get off.

Referring to fig. 3, in the embodiment of the present invention, the hydraulic system 100 includes:

a fuel tank 10;

a two-position three-way valve 30;

the oil inlet pipeline 50 is communicated with the two-position three-way valve 30 and the oil tank 10, a one-way valve 55 is further arranged on the oil inlet pipeline 50, and the one-way valve 55 is positioned between the two-position three-way valve 30 and the oil tank 10 and is communicated in a one-way mode along the direction from the oil tank 10 to the two-position three-way valve 30;

an oil outlet pipeline 70, wherein the oil outlet pipeline 70 is communicated with the two-position three-way valve 30 and the oil tank 10; and

the single-acting oil cylinder 90 and the main pipeline 80, wherein the main pipeline 80 is communicated with the single-acting oil cylinder 90 and the two-position three-way valve 30;

the two-position three-way valve 30 is communicated with the main pipeline 80 and the oil inlet pipeline 50; the two-position three-way valve 30 communicates the main line 80 and the oil outlet line 70.

The utility model discloses among the technical scheme, the work fill 203 in the hydraulic system 100 drive side on the quick-witted auxiliary vehicle 200 rises the in-process, controls two-position three-way valve 30 intercommunication main line 80 and advances oil pipe way 50, and fluid in the oil tank 10 is in proper order through advancing oil pipe way 50, two-position three-way valve 30 and main line 80, carries to the single-action hydro-cylinder 90 in, and the single-action hydro-cylinder 90 drives work fill 203 and rises, and work fill 203 drives the staff and rises to the assigned position. When the worker works at a high place, the hydraulic driving system stops working, and the one-way valve 55 on the oil inlet pipeline 50 is only communicated along the direction from the oil tank 10 to the two-position three-way valve 30 and cannot be reversely communicated, so that the single-acting oil cylinder 90 can keep the working bucket 203 at a high position without descending, the worker can be guaranteed to work at the high position, and the phenomenon of falling cannot occur. In the descending process of the working bucket 203 on the auxiliary vehicle 200 of the side-standing machine, the two-position three-way valve 30 is controlled to be communicated with the main pipeline 80 and the oil outlet pipeline 70, the single-action oil cylinder 90 can move reversely under the action of gravity by the working bucket 203, oil in the single-action oil cylinder 90 sequentially flows back to the oil tank 10 through the main pipeline 80, the two-position three-way valve 30 and the oil outlet pipeline 70, and the working bucket 203 carries workers to descend to a specified position.

The utility model discloses utilize two-position three-way valve 30 to combine single-action hydro-cylinder 90 among the technical scheme for work fill 203 need not drive power at the in-process that falls, only relies on self action of gravity to realize the action that descends, makes this hydraulic system 100 easy operation, and can save this hydraulic system 100's energy consumption.

In the above embodiment, the single-acting cylinder 90 includes the cylinder body 91 and the reciprocating rod 93, the reciprocating rod 93 is partially received in the cylinder body 91 to divide the cylinder body 91 into the rod-less chamber 94 and the rod chamber 92, and the main pipe 80 communicates the rod-less chamber 94 and the two-position three-way valve 30. The frame 201 of the auxiliary vehicle 200 for the side stand machine is connected to the cylinder 91, and the bucket 203 is connected to the reciprocating rod 93. In the working process of the hydraulic system 100, when the main pipeline 80 is communicated with the oil inlet pipeline 50 through the two-position three-way valve 30, oil enters the rodless cavity 94 through the two-position three-way valve 30 and the main pipeline 80, the oil pushes the reciprocating rod 93 to move, and the reciprocating rod 93 drives the working bucket 203 to ascend; when the main pipeline 80 is connected with the oil outlet pipeline 70 through the two-position three-way valve 30, under the action of gravity of the working bucket 203, the reciprocating rod 93 compresses oil in the rodless cavity 94, the oil enters the oil outlet pipeline 70 through the main pipeline 80 and the two-position three-way valve 30, and the working bucket 203 drives a worker to descend. The reciprocating rod 93 may be a plunger rod or a piston rod.

Further, the single-acting cylinder 90 further includes an elastic member 95, the elastic member 95 elastically abuts against the cylinder body 91 and the reciprocating rod 93 in the rod chamber 92, one end of the elastic member 95 abuts against the inner side of the top of the single-acting cylinder 90, the other end abuts against the lower end surface of the reciprocating rod 93, and the lower end surface may be a piston. The elastic member 95 abuts against the reciprocating lever 93, and applies a force to the reciprocating lever 93 in a direction from the lever chamber 92 to the rodless chamber 94. When the gravity of the working bucket 203 is insufficient, the elastic member 95 can enable the reciprocating rod 93 to further compress oil in the rodless cavity 94, the elastic member 95 can drive the oil to enter the main pipeline 80 from the rodless cavity 94 together with the gravity of the working bucket 203, and then enter the oil tank 10 through the two-position three-way valve 30 and the oil outlet pipeline 70, so that the auxiliary working bucket 203 descends. The elastic member 95 may be selected as a spring.

In the above embodiment, the oil inlet pipeline 50 includes the first pipeline 51 and the oil pump 53, one end of the first pipeline 51 is communicated with the two-position three-way valve 30, the other end is communicated with the oil tank 10, the oil pump 53 and the check valve 55 are connected in series with the first pipeline 51, and the check valve 55 is located between the two-position three-way valve 30 and the oil pump 53.

The oil in the oil tank 10 is driven by the oil pump 53 to enter the first pipe 51, and then enters the main pipe through the check valve 55 and the two-position three-way valve 30, and further flows into the rodless chamber 94 of the single-acting cylinder 90. The ascending speed of the working bucket 203 can be controlled by adjusting the output flow of the oil pump 53, so that the safety and stability of the ascending process of the working bucket 203 carrying the working personnel are ensured.

In order to ensure the maximum working pressure of the system, the hydraulic system 100 may further include a pressure regulating line 60, and the oil inlet line 50 is connected in parallel with the pressure regulating line 60. The pressure regulating pipeline 60 comprises a second pipeline 61 and an overflow valve 63, one end of the second pipeline 61 is communicated with the first pipeline 51 and is positioned between the one-way valve 55 and the oil pump 53, the other end of the second pipeline 61 is communicated with the oil tank 10, and the overflow valve 63 is arranged on the second pipeline 61. The opening value of the overflow valve 63 is set to the maximum pressure allowed by the system, and when the pressure of the oil pump 53 is greater than the maximum pressure value, the oil in the system flows back to the oil tank 10 through the second pipeline 61 and the overflow valve 63, so that the hydraulic system 100 can be protected, and the hydraulic system 100 is prevented from being damaged due to the fact that the oil in the system is too high in pressure.

In the above embodiment, the oil inlet pipeline 50 further includes a filter 57, and the filter 57 is connected in series to the first pipeline 51 and is located between the oil pump 53 and the oil tank 10. Oil pump 53 is at the interior fluid in-process of extraction oil tank 10, and fluid is earlier through the filtration of filter 57, gets rid of the impurity in the fluid for through oil tank 10 and get into hydraulic system 100 in fluid more pure, prevent oil pump 53's damage, improve oil pump 53's life, and can protect other spare parts in hydraulic system 100.

Further, the oil outlet pipeline 70 includes a third pipeline 71 and a speed regulating valve 73, one end of the third pipeline 71 is communicated with the two-position three-way valve 30, the other end is communicated with the oil tank 10, and the speed regulating valve 73 is connected in series with the third pipeline 71. This governing valve 73 can control the speed that the work fill 203 descends among the fluid backward flow process for the work fill 203 that carries the staff can steadily descend as required, guarantees safety, the steady of decline process.

In the above embodiment, the two-position three-way valve 30 includes a valve body having an opening a, an opening P and an opening T, the opening a communicates with the main pipe, the opening B communicates with the first pipe, the opening T communicates with the third pipe, and the valve core has a first communicating position and a second communicating position. When the first communication position of the valve core corresponds to the valve body, the port A is communicated with the port P, the port T is closed, the oil pump 53 can convey oil in the oil tank 10 to the main pipeline 80 from the port P to the port A through the first pipeline 51 and enter the rodless cavity 94 of the single-action oil cylinder 90; when the second communication position of the valve core corresponds to the valve body, the port A is communicated with the port T, the port P is closed, and oil in the rodless cavity 94 of the single-action oil cylinder 90 is conveyed to the third pipeline 71 from the port A to the port T through the main pipeline 80 and flows back to the oil tank 10.

The hydraulic system 100 of the above embodiment includes one or more single-acting cylinders 90. When the single-acting cylinder 90 is one, the entire structure of the hydraulic system 100 can be made simple. Referring to fig. 4, when there are a plurality of single-acting cylinders 90, that is, there are two or more single-acting cylinders 90, the plurality of single-acting cylinders 90 are connected in parallel and then connected in series to the main line 80. The cylinder bodies 91 of the single-acting oil cylinders 90 are connected to the frame 201 of the auxiliary vehicle 200 of the side-standing machine, and the reciprocating rods 93 of the single-acting oil cylinders 90 are connected to the working bucket 203, so that the hydraulic system 100 drives the working bucket 203 to ascend, the working bucket 203 descends more stably, and the safety performance is higher.

In the above embodiment, the two-position three-way valve 30 is a two-position three-way solenoid valve. The reversing of the valve core in the two-position three-way electromagnetic valve can be realized by electrifying the coil. It can be understood that the two-position three-way valve 30 in the embodiment of the present invention can also be reversed manually.

As shown in fig. 1, the utility model also provides a side machine auxiliary vehicle 200, this side machine auxiliary vehicle 200 includes frame 201, work fill 203 and the hydraulic system 100 of side machine auxiliary vehicle 200, and the concrete structure of this hydraulic system 100 refers to above-mentioned embodiment, because this side machine auxiliary vehicle 200 has adopted all technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and it is no longer repeated here. The single-acting cylinder 90 of the hydraulic system 100 is connected to the frame 201 and the bucket 203, and drives the bucket 203 to ascend and descend along the frame 201.

The frame 201 provides support and guidance for the raising and lowering of the bucket 203, so that the bucket 203 can be raised and lowered along the extending direction of the frame 201, and the bucket 203 can move stably.

Further, the frame 201 includes a body 2011 and a support 2013, the body 2011 may be provided with a roller, and the roller on the body is directly used to transport the sidecar 200 to a specified position, or the other equipment is used to transport the sidecar 200 to a specified position.

After the side erecting machine 300 overturns the prefabricated part 301, the included angle between the prefabricated part 301 and the horizontal plane is α, and the included angle between the support frame 2013 of the auxiliary vehicle 200 of the side erecting machine and the horizontal plane is α. the single-acting oil cylinder 90 of the hydraulic system 100 is connected with the support frame 2013 and the working bucket 203 and drives the working bucket 203 to ascend and descend along the support frame 2013, the support frame 2013 is parallel to the prefabricated part 301, and the working bucket 203 ascending along the support frame 2013 can keep the same distance with the prefabricated part 301 in the ascending process, so that a worker in the working bucket 203 can hook a lifting appliance on a travelling crane on the prefabricated part 301 conveniently.

Generally, α can be in the following range, wherein α is more than or equal to 80 degrees and less than or equal to 90 degrees, α can be in the range of 80 degrees, 85 degrees or 90 degrees, and also can be any value in the range, because the side erecting machine 300 usually turns the prefabricated part 301 to about 85 degrees, the supporting frame 2013 is parallel to the turned prefabricated part 301, or the supporting frame 2013 gradually approaches the prefabricated part 301 from bottom to top so as to ensure that the working bucket 203 rises to a specified height, and a worker can smoothly complete the operation.

The supporting frame 2013 can be fixed on the vehicle body 2011 or can be rotatably connected with the vehicle body 2011 when the supporting frame 2013 is fixed on the vehicle body 2011, one end of the supporting frame 2013 is connected with the vehicle body 2011, the other end of the supporting frame 2013 extends upwards in the direction deviating from the direction of the vehicle body 2011, and the included angle between the supporting frame 2013 and the horizontal plane is α.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims (10)

1. The utility model provides a hydraulic system of side stand quick-witted auxiliary vehicle which characterized in that includes:

an oil tank;

a two-position three-way valve;

the oil inlet pipeline is communicated with the two-position three-way valve and the oil tank, and is also provided with a one-way valve which is positioned between the two-position three-way valve and the oil tank and is communicated in a one-way mode along the direction from the oil tank to the two-position three-way valve;

the oil outlet pipeline is communicated with the two-position three-way valve and the oil tank; and

the single-acting oil cylinder and the main pipeline are communicated with each other;

the two-position three-way valve is communicated with the main pipeline and the oil inlet pipeline; the two-position three-way valve is communicated with the main pipeline and the oil outlet pipeline.

2. The hydraulic system of a sidecar according to claim 1, wherein the single-acting cylinder includes a cylinder body and a reciprocating rod, the reciprocating rod is partially received in the cylinder body to divide the cylinder body into a rodless chamber and a rod chamber, and the main line communicates the rodless chamber and the two-position three-way valve.

3. The hydraulic system of a sidecar according to claim 2, wherein said single-acting cylinder further comprises an elastic member elastically abutting said cylinder body and said reciprocating rod in said rod chamber.

4. The hydraulic system of the auxiliary vehicle for the side stand machine as claimed in any one of claims 1 to 3, wherein the oil inlet pipeline comprises a first pipeline and an oil pump, one end of the first pipeline is communicated with the two-position three-way valve, the other end of the first pipeline is communicated with the oil tank, the oil pump and the one-way valve are connected in series with the first pipeline, and the one-way valve is located between the two-position three-way valve and the oil pump;

the hydraulic system further comprises a second pipeline, one end of the second pipeline is communicated with the first pipeline and is located between the one-way valve and the oil pump, the other end of the second pipeline is communicated with the oil tank, and an overflow valve is connected to the second pipeline in series.

5. The hydraulic system of a sidecar according to claim 4, wherein the oil feed line further comprises a filter connected in series to the first pipe between the oil pump and the oil tank.

6. The hydraulic system of the auxiliary vehicle of the side stand machine as claimed in any one of claims 1 to 3, wherein the oil outlet pipeline comprises a third pipeline and a speed regulating valve, one end of the third pipeline is communicated with the two-position three-way valve, the other end of the third pipeline is communicated with the oil tank, and the speed regulating valve is connected in series with the third pipeline.

7. The hydraulic system of a sidecar according to claim 1, wherein the two-position three-way valve is a two-position three-way solenoid valve.

8. The hydraulic system of a sidecar according to claim 1, wherein the hydraulic system includes a plurality of the single-acting cylinders, and the plurality of single-acting cylinders are connected in parallel and then connected in series to the main line.

9. A sidecar, comprising:

a frame;

a working bucket; and

the hydraulic system of the auxiliary vehicle of the side stand machine is as claimed in any one of the claims 1 to 8, and a single-acting oil cylinder of the hydraulic system is connected with the frame and the working bucket and drives the working bucket to ascend and descend along the frame.

10. The sidecar according to claim 9, wherein said frame comprises:

a vehicle body; and

the supporting frame is rotatably connected to the vehicle body and can be kept fixed relative to the vehicle body; or the support frame is fixed on the vehicle body and is parallel to the prefabricated part on the side erecting machine;

and a single-acting oil cylinder of the hydraulic system is connected with the support frame and the working bucket and drives the working bucket to ascend and descend along the support frame.

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