CN217107673U

CN217107673U - Be applied to parking equipment's novel hydraulic cylinder

Info

Publication number: CN217107673U
Application number: CN202220953289.9U
Authority: CN
Inventors: 郭星; 李琨; 牛亚男
Original assignee: Changzhi Changqing Technology Co ltd
Current assignee: Changzhi Changqing Technology Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-08-02
Anticipated expiration: 2032-04-24

Abstract

The utility model relates to a simple and easy lift type machinery parking equipment technical field, concretely relates to be applied to parking equipment's novel hydraulic cylinder. The hydraulic oil cylinder comprises a primary oil cylinder and a secondary oil cylinder, wherein a front cavity of the primary oil cylinder is communicated with a rear cavity of the secondary oil cylinder through an oil way, so that a built-in independent conversion working oil cavity is formed. Compared with the traditional oil cylinder, the novel hydraulic oil cylinder applied to the parking equipment has the advantages that the two-stage oil cylinder simultaneously performs telescopic action, and the lifting time of the equipment can be obviously shortened within an equivalent stroke; and the ascending speed and the descending speed are equal, the influence of the load of the parking equipment is avoided, the stability of the equipment in the lifting process is improved, and the superiority of the hydraulic drive type simple parking equipment is further improved.

Description

Be applied to parking equipment's novel hydraulic cylinder

Technical Field

The utility model relates to a simple and easy lift type machinery parking equipment technical field, concretely relates to be applied to parking equipment's novel hydraulic cylinder.

Background

The lifting device of the simple lifting mechanical parking equipment is divided into a mechanical driving device and a hydraulic driving device. Wherein, hydraulic drive generally adopts single-action plunger type pneumatic cylinder, carries the sweep and is connected with hydraulic cylinder through the mount pad. The typical structure of the single-acting plunger type hydraulic cylinder is a two-stage sleeve type hydraulic cylinder, and the end part of a plunger rod is fixed with an upright post.

When the vehicle carrying plate needs to ascend, if the vehicle is stored, the hydraulic system supplies oil to the hydraulic cylinder barrel through the oil port at the end of the plunger rod, the hydraulic oil firstly pushes the first-stage large-diameter cylinder barrel to move upwards, and the cylinder barrel pushes the vehicle carrying plate to do ascending motion. When the stroke of the first-stage large-diameter oil cylinder is ended, the hydraulic oil pushes the second-stage small-diameter cylinder barrel to extend outwards, so that the vehicle carrying plate is pushed to continue to move upwards until the stroke of the second-stage oil cylinder is ended. At the moment, the vehicle carrying plate rises to the highest position, and the parking equipment completes the rising action. Because the inner diameter of the first-stage cylinder barrel is larger than that of the second-stage cylinder barrel, and the moving speed of the second-stage oil cylinder is higher than that of the first-stage oil cylinder, the ascending speed of the vehicle carrying plate is slow firstly and then fast in the ascending process, and when the ascending of the first-stage oil cylinder is finished and the second-stage oil cylinder starts to act, the ascending speed of the vehicle carrying plate has a sudden change process.

When the vehicle carrying plate needs to descend, such as when taking a vehicle, hydraulic oil in the hydraulic cylinder barrel returns to the hydraulic tank through the oil inlet. The single-acting cylinder has only one oil port, the oil inlet and the oil return are the same oil port, the power of the hydraulic oil is determined by the weight of the load, and the weight of the load consists of the self weight of the vehicle carrying plate and the weight of a vehicle parked on the vehicle carrying plate. When the vehicle carrying plate is parked with a vehicle, the load is large, the oil return pressure of hydraulic oil is large, the oil return speed is high, and the vehicle carrying plate descends quickly; when no vehicle is arranged on the vehicle carrying plate, the load is only the weight of the vehicle carrying plate, the oil return pressure of hydraulic oil is small, the oil return speed is small, and the vehicle carrying plate descends slowly. In the oil return process, the two-stage oil cylinders retract in sequence, wherein the two-stage oil cylinder (small cylinder diameter) retracts firstly, and the retraction of the one-stage oil cylinder (large cylinder diameter) does not start until the stroke is finished. And because of the different cylinder diameters, the retraction speed of the primary oil cylinder is slower than that of the secondary oil cylinder, so that the descending speed of the vehicle carrying plate is greatly influenced by the load and the vehicle carrying plate is sequentially retracted at different oil return speeds.

Aiming at the simple lifting parking equipment driven by hydraulic pressure in the prior art, the lifting speed is not influenced by the load and only depends on the pressure set by a hydraulic system; the descending speed is greatly influenced by the load, the descending speed is higher when vehicles exist, and the descending speed is lower when no vehicles exist. And the two-stage single-acting hydraulic cylinder is sequentially operated when extending or retracting, the speed is not stable when the equipment is lifted, the rising speed and the falling speed have obvious difference, the parking and taking efficiency is low, and the customer experience is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an at least defect among the prior art is overcome to a main aim at, provides a novel hydraulic cylinder who is applied to parking equipment, is the two-stage double-acting piston hydraulic cylinder that can realize that the functioning speed does not receive the load influence, and two-way speed is invariable.

In order to realize the technical scheme, the utility model discloses a following technical scheme:

according to the utility model discloses an aspect provides a be applied to parking equipment's novel hydraulic cylinder, including one-level hydro-cylinder, second grade hydro-cylinder, the oil circuit intercommunication is passed through to one-level hydro-cylinder antechamber and second grade hydro-cylinder back chamber, has formed a built-in independent conversion working oil pocket.

The independent conversion working oil cavity does not exchange oil with a hydraulic system during normal work, the independent conversion working oil cavity is filled with oil through an independent oil filling port before the oil cylinder starts to work, and after the oil is full of the whole oil cavity, the oil filling port is tightly screwed through the oil filling port plug. Through the built-in independent conversion working oil cavity, the function that two stages of oil cylinders stretch out and draw back simultaneously when the oil cylinders work can be realized structurally, and the design and processing of complex oil ways of all components of the oil cylinders are avoided.

According to the utility model discloses an embodiment, the volume of one-level hydro-cylinder front chamber and the volume of second grade hydro-cylinder back chamber equal.

According to an embodiment of the present invention, the primary cylinder includes a primary cylinder barrel, a primary cylinder piston, a primary cylinder cover, and a secondary cylinder barrel, the primary cylinder piston is disposed in the primary cylinder barrel, the top end of the primary cylinder barrel is sealed by the primary cylinder cover, and the end of the primary cylinder piston is fixedly connected to the secondary cylinder barrel; wherein the primary piston is slidable within the primary cylinder along the inner wall thereof.

According to the utility model discloses an embodiment, the one-level cylinder cap is equipped with hydro-cylinder top hydraulic fluid port and connects, through hydro-cylinder top hydraulic fluid port connects and carries out the input and output of fluid with hydraulic system.

According to the utility model discloses an embodiment, be provided with one-level hydro-cylinder piston seal assembly on the outer wall of one-level hydro-cylinder piston.

According to the utility model discloses an embodiment, the one end that the one-level cylinder kept away from the one-level cylinder cap is provided with the one-level hydro-cylinder uide bushing install one-level piston rod seal assembly on the inner wall of one-level hydro-cylinder uide bushing.

According to the utility model discloses an embodiment, the one end that is close to one-level hydro-cylinder uide bushing on the outer wall of one-level cylinder is equipped with the oil filler point that link up, seals the oil filler point through installation oil filler point plug.

According to the utility model discloses an embodiment, be equipped with the radial oil through hole of one-level on the outer wall of one-level hydro-cylinder piston, the liquid of intracavity passes through the radial oil through hole of one-level and exchanges fluid with the second grade hydro-cylinder back cavity before the one-level hydro-cylinder.

According to an embodiment of the present invention, the first-stage cylinder inner wall, the second-stage cylinder outer wall, the inner cavity of the first-stage cylinder piston, and the first-stage radial oil through hole constitute a first-stage cylinder front cavity; it should be noted that when the primary oil cylinder front cavity works normally, oil needs to be filled in advance through the oil filling port, and the oil filling port is sealed through the oil filling port plug.

Meanwhile, the primary cylinder barrel, the primary cylinder piston and the primary cylinder cover form a primary cylinder rear cavity; and oil is input and output through the oil port connector at the top of the oil cylinder and a hydraulic system.

According to the utility model discloses an embodiment, the second grade hydro-cylinder includes second grade cylinder, second grade hydro-cylinder piston rod, the top of second grade cylinder and the terminal fixed connection of one-level hydro-cylinder piston, and second grade hydro-cylinder piston sets up in the second grade cylinder, second grade hydro-cylinder piston and second grade hydro-cylinder piston rod fixed connection, the center of second grade hydro-cylinder piston rod is equipped with the axial through oil hole, is equipped with the radial through oil hole of second grade that link up at the outer wall of second grade hydro-cylinder piston rod simultaneously, just the radial through oil hole of second grade communicates with the axial through oil hole.

According to the utility model discloses an embodiment, second grade cylinder's bottom is through second grade hydro-cylinder uide bushing and second grade hydro-cylinder piston rod fixed connection.

According to the utility model discloses an embodiment, be equipped with a plurality of secondary oil cylinder uide bushing seal assembly on the inner wall of secondary oil cylinder uide bushing and the contact of secondary oil cylinder piston rod.

According to the utility model discloses an embodiment, be equipped with secondary cylinder piston seal assembly on the outer wall of secondary cylinder piston, through secondary cylinder piston seal assembly seals.

According to the utility model discloses an embodiment, the bottom of secondary oil cylinder piston rod is equipped with piston rod bottom hydraulic fluid port and connects, through piston rod bottom hydraulic fluid port connects and hydraulic system carries out the input and output of fluid.

According to an embodiment of the present invention, the second-stage oil cylinder front cavity is formed by the axle center oil through hole, the second-stage radial oil through hole, the outer wall of the second-stage oil cylinder piston rod and the inner wall of the second-stage cylinder barrel in the second-stage oil cylinder piston rod, and the oil input and output are performed with the hydraulic system through the oil port joint at the bottom of the piston rod; meanwhile, the inner cavities of the secondary oil cylinder, the secondary oil cylinder piston and the primary oil cylinder piston form a secondary oil cylinder rear cavity. And the rear cavity of the secondary oil cylinder and the front cavity of the primary oil cylinder are communicated normally.

The utility model discloses well one-level hydro-cylinder, second grade hydro-cylinder are stretched out simultaneously or by the hydraulic system fuel feeding when retracting, and the speed of hydro-cylinder operation depends on the pressure that hydraulic system set, and is irrelevant with the load size to the year sweep that guarantees equipment is at the in-process that rises and the decline in-process speed equals, has guaranteed the stability of equipment at the lift in-process. Meanwhile, the two-stage oil cylinders extend or retract simultaneously, but do not sequentially extend or retract, so that the working speed of the oil cylinders can be further improved, the lifting time of the equipment is obviously shortened, and the efficiency of parking and taking the car of the parking equipment is improved.

According to the utility model discloses an embodiment, one-level piston rod seal assembly, one-level hydro-cylinder piston seal assembly, second grade hydro-cylinder uide bushing seal assembly all adopt the sealing washer or sealed the pad.

According to the above technical scheme, the utility model discloses possess at least one in following advantage and the positive effect:

the utility model discloses in, the oil circuit intercommunication is passed through to one-level hydro-cylinder antechamber and second grade hydro-cylinder back chamber, has constituted a built-in independent conversion working oil pocket, does not carry out the fluid exchange with hydraulic system at normal during operation, can realize that one-level hydro-cylinder, second grade hydro-cylinder stretch out and draw back simultaneously, has reached the effect that makes a lot of effort doubly, has avoided the design of the complicated oil circuit of each subassembly of hydro-cylinder simultaneously.

The utility model relates to a be applied to parking equipment's novel hydraulic cylinder in, when adopting the drive of the two-stage two-action hydraulic cylinder, parking equipment not only the elevating rate equals, operates steadily, and elevating rate is faster in the equivalent stroke, has effectively shortened the time of parking and getting the car, and customer experience is good.

Compared with the traditional oil cylinder, the novel hydraulic oil cylinder applied to the parking equipment has the advantages that the two-stage oil cylinder simultaneously performs telescopic action, and the lifting time of the equipment can be obviously shortened within an equivalent stroke; and the ascending speed and the descending speed are equal, the influence of the load of the parking equipment is avoided, the stability of the equipment in the lifting process is improved, and the superiority of the hydraulic drive type simple parking equipment is further improved. The structure is compact, the layout is flexible, and the space utilization rate is high.

Drawings

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

Fig. 1 is a state of a two-stage double-acting piston cylinder in a novel hydraulic cylinder applied to parking equipment according to the present invention, when the two-stage double-acting piston cylinder is fully retracted;

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

fig. 3 is a state when the two-stage double-acting piston cylinder is partially extended in the novel hydraulic cylinder applied to the parking equipment according to the present invention;

fig. 4 is a state when the two-stage double-acting piston cylinder is fully extended in the novel hydraulic cylinder applied to the parking equipment according to the present invention;

fig. 5 is the schematic view of the appearance structure of the novel hydraulic cylinder applied to the parking equipment of the present invention.

The reference numerals are explained below:

1-a first-stage oil cylinder guide sleeve; 2-a primary piston rod sealing assembly; 3-oil filling port plug; 4-first-stage cylinder barrel; 5-primary oil cylinder front cavity; 6-a second-level radial oil through hole; 7-first-stage oil cylinder piston; 8-a primary oil cylinder piston sealing assembly; 9-first-stage cylinder cover; 10-oil cylinder top oil port joint; 11-first-stage radial oil through holes; 12-a secondary cylinder piston seal assembly; 13-two-stage cylinder piston; 14-axial oil through holes; 15-a secondary cylinder piston rod; 16-a secondary cylinder barrel; 17-a front cavity of the secondary oil cylinder; 18-a two-stage oil cylinder guide sleeve; 19-a secondary oil cylinder guide sleeve sealing assembly; 20-process plug screwing; 21-a piston rod bottom oil port joint; 22-oil cylinder clamping seat; 23-a rear cavity of the primary oil cylinder; 24-back cavity of the secondary oil cylinder.

Detailed Description

In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings, which is for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention is understood according to the specific situation.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to the attached drawings 1-5, the utility model relates to a be applied to parking equipment's novel hydraulic cylinder, including one-level hydro-cylinder, secondary cylinder, one-level hydro-cylinder front chamber 5 and secondary cylinder back chamber 24 pass through the oil circuit intercommunication, have formed a built-in independent conversion working oil pocket. Wherein, independent conversion working oil chamber not carry out fluid exchange with hydraulic system at normal during operation the utility model discloses a before hydraulic cylinder begins work, for independent conversion working oil chamber filling fluid through independent oiling mouth, after fluid is full of whole oil pocket, rethread oiling mouth plug 3 screwed up the oiling mouth is sealed. Through the built-in independent conversion working oil cavity, the primary oil cylinder and the secondary oil cylinder can be simultaneously stretched and contracted when the oil cylinder works, and the design and processing of complex oil ways of all components of the oil cylinder are avoided. Furthermore, the volume of the primary oil cylinder front cavity 5 is equal to the volume of the secondary oil cylinder rear cavity 24, so that when the primary oil cylinder and the secondary oil cylinder stretch out and draw back, the effective stroke of the hydraulic oil cylinder can be ensured.

In the embodiment, the primary oil cylinder comprises a primary cylinder barrel 4, a primary oil cylinder piston 7, a primary cylinder cover 9 and a secondary cylinder barrel 16, wherein the primary oil cylinder piston 7 is arranged in the primary cylinder barrel 4, the top end of the primary cylinder barrel 4 is sealed by the primary cylinder cover 9, and the tail end of the primary oil cylinder piston 7 is fixedly connected with the secondary cylinder barrel 16; wherein the primary piston 7 is slidable along its inner wall inside the primary cylinder 4. The first-stage cylinder cover 9 is provided with an oil cylinder top oil port connector 10, and oil is input and output through the oil cylinder top oil port connector 10 and a hydraulic system. Furthermore, a primary oil cylinder piston sealing assembly 8 is arranged on the outer wall of the primary oil cylinder piston 7, oil leakage can be prevented, and the sealing performance of a product is improved. Similarly, one end of the primary cylinder barrel 4 far away from the primary cylinder cover 9 is provided with a primary cylinder guide sleeve 1, and a primary piston rod sealing assembly 2 is mounted on the inner wall of the primary cylinder guide sleeve 1, so that the sealing performance of the product is improved.

In this embodiment, the one end that is close to one-level hydro-cylinder uide bushing 1 on the outer wall of one-level cylinder 4 is equipped with the oil filler point that link up, screws up sealed through installation oil filler point plug 3 to the oil filler point. As already explained above, after the oil filler plug 3 is tightly sealed, the oil in the independent switching working oil chamber is not exchanged with the hydraulic system, but is exchanged between the primary cylinder front chamber 5 and the secondary cylinder rear chamber 24 only through the primary radial oil sharing hole 11. Furthermore, a primary radial oil through hole 11 is formed in the outer wall of the primary oil cylinder piston 7, and liquid in the primary oil cylinder front cavity 5 exchanges liquid with the secondary oil cylinder rear cavity 23 through the primary radial oil through hole 11.

Wherein, the inner wall of the first-stage cylinder barrel 4, the outer wall of the second-stage cylinder barrel 16, the inner cavity of the first-stage oil cylinder piston 7 and the first-stage radial oil through hole 11 form a first-stage oil cylinder front cavity 5; it should be noted that, when the primary oil cylinder front cavity 5 works normally, oil needs to be filled in advance through the oil filling port, and the oil filling port is sealed through the oil filling port plug 3. The utility model discloses hydraulic cylinder must accomplish earlier independent conversion working oil pocket oiling before beginning work, and its order is unpack oil filler point plug 3 apart, refuels to the oil pocket in, must guarantee in the refueling process that one-level hydro-cylinder antechamber 5 reaches the maximum stroke position, just so can make whole oil pocket be full of fluid. And after the independent conversion working oil cavity is filled with oil and the gas is exhausted, the oil cavity is sealed and screwed by the oil filling port plug 3.

Meanwhile, the primary cylinder barrel 4, the primary cylinder piston 7 and the primary cylinder cover 9 form a primary cylinder rear cavity 23; and oil is input and output through the oil port connector 10 at the top of the oil cylinder and a hydraulic system.

In this embodiment, the secondary cylinder includes a secondary cylinder barrel 16, a secondary cylinder piston 13, and a secondary cylinder piston rod 15, the top end of the secondary cylinder barrel 16 is fixedly connected to the end of the primary cylinder piston 7, the secondary cylinder piston 13 is disposed in the secondary cylinder barrel 16, the secondary cylinder piston 13 is fixedly connected to the secondary cylinder piston rod 15, an axial oil through hole 14 is disposed at the center of the secondary cylinder piston rod 15, a through secondary radial oil through hole 6 is disposed on the outer wall of the secondary cylinder piston rod 15, and the secondary radial oil through hole 6 is communicated with the axial oil through hole 14. Further, the secondary cylinder piston 13 is connected by a secondary cylinder piston rod 15 in a threaded manner. Wherein, the axial oil through hole 14 of the piston rod 15 of the secondary oil cylinder is sealed by a process plug 20.

In this embodiment, the bottom end of the secondary cylinder 16 is fixedly connected to the secondary cylinder piston rod 15 through the secondary cylinder guide sleeve 19. Furthermore, a plurality of secondary oil cylinder guide sleeve sealing assemblies 19 are arranged on the inner wall of the secondary oil cylinder guide sleeve 18, which is in contact with the secondary oil cylinder piston rod 15. Similarly, a secondary oil cylinder piston sealing assembly 12 is arranged on the outer wall of the secondary oil cylinder piston 13, and sealing is performed through the secondary oil cylinder piston sealing assembly 12.

In this embodiment, a piston rod bottom oil port joint 21 is arranged at the bottom end of the piston rod 15 of the secondary oil cylinder, and oil is input and output through the piston rod bottom oil port joint 21 and the hydraulic system.

In the utility model, the axle center oil through hole 14, the second radial oil through hole 6, the outer wall of the second oil cylinder piston rod 15 and the inner wall of the second cylinder barrel 16 in the second oil cylinder piston rod 15 form a second oil cylinder front cavity 17, and oil is input and output through the oil port joint 21 at the bottom of the piston rod and a hydraulic system; meanwhile, the inner cavities of the secondary cylinder 16, the secondary cylinder piston 13 and the primary cylinder piston 7 form a secondary cylinder rear cavity 24. The rear cavity 24 of the secondary oil cylinder and the front cavity 5 of the primary oil cylinder are communicated normally.

The utility model discloses in, hydro-cylinder top hydraulic fluid port connects 10, piston rod bottom hydraulic fluid port connects 21, and one of them is the oil inlet, another then is the oil-out, and these two work hydraulic fluid ports all carry out the fluid with hydraulic system and are mutual, carry out the input/output of fluid. When the oil cylinder works in a reversing way, the two oil ports have opposite functions, namely the original oil inlet is changed into the oil outlet, the original oil outlet is changed into the oil inlet, and the double-acting function of the novel oil cylinder is structurally guaranteed.

The utility model discloses in, one-level piston rod seal assembly 2, one-level hydro-cylinder piston seal assembly 8, second grade hydro-cylinder piston seal assembly 12, second grade hydro-cylinder uide bushing seal assembly 19 all adopt the sealing washer or sealed the pad.

As shown in fig. 2, the utility model discloses a hydraulic cylinder belongs to two-stage double-acting hydraulic cylinder, and the input and output of hydro-cylinder during operation hydraulic oil is gone on through piston rod bottom hydraulic fluid port joint 21 and hydro-cylinder top hydraulic fluid port joint 10, and the front end of secondary oil cylinder piston rod 15 is fixed on parking equipment's stand, and this stand is not shown in the figure. When the parking equipment ascends, oil is fed into an oil port joint 10 at the top of the oil cylinder, and oil is fed back into an oil port joint 21 at the bottom of the piston rod; on the contrary, when the parking equipment descends, the oil port joint 21 at the bottom of the piston rod takes oil, the oil port joint 10 at the top of the oil cylinder takes oil, the double-acting function of the oil cylinder is realized, and the expansion speed of the hydraulic oil cylinder is only related to the pressure set by the hydraulic system and is not related to the load of the parking equipment.

As shown in figure 3, the motion form of the hydraulic oil cylinder of the utility model is that the piston rod 15 of the secondary oil cylinder is fixed, and the cylinder barrel component moves. When the parking apparatus needs to be raised, the path of the hydraulic oil is described as follows: hydraulic oil of a hydraulic system enters oil through an oil port connector 10 at the top of the oil cylinder, the hydraulic oil enters a primary oil cylinder rear cavity 23, components such as a primary cylinder cover 9 and a primary cylinder barrel 4 are pushed to extend outwards together, and the volume of the primary oil cylinder rear cavity 23 begins to be gradually increased; meanwhile, the volume of the primary oil cylinder front cavity 5 is gradually reduced, oil in the primary oil cylinder front cavity 5 is pushed into the secondary oil cylinder rear cavity 24 through the primary radial oil through hole 11, hydraulic oil pushes the secondary cylinder barrel 16 and the secondary oil cylinder guide sleeve 18 to extend outwards, and the volume of the secondary oil cylinder rear cavity 24 is gradually increased. Meanwhile, the volume of the front cavity 17 of the secondary oil cylinder is gradually reduced, oil in the cavity returns through an oil port connector 21 at the bottom of the piston rod, and the oil flows back to the hydraulic system. And the vehicle carrying plate of the parking equipment starts to rise until the strokes of the primary oil cylinder and the secondary oil cylinder are finished, and the lifting mechanism of the parking equipment finishes the rising action.

As shown in fig. 4, the two-stage double acting cylinder of the present invention is in a fully extended state, and the vehicle carrying board of the parking equipment is located at the highest position. When the parking apparatus needs to be lowered, the path of the hydraulic oil is described as follows: hydraulic oil of the hydraulic system enters oil through an oil port joint 21 at the bottom of the piston rod, enters the front cavity 17 of the secondary oil cylinder, pushes the secondary oil cylinder 16 and the guide sleeve 18 of the secondary oil cylinder to move leftwards, and gradually increases the volume of the front cavity 17 of the secondary oil cylinder; meanwhile, the volume of the rear cavity 24 of the secondary oil cylinder begins to be gradually reduced, oil in the rear cavity 24 of the secondary oil cylinder is gradually compressed and enters the front cavity 5 of the primary oil cylinder through the primary radial oil hole 11, the primary cylinder barrel 4 and the guide sleeve 1 assembly of the primary oil cylinder are pushed to move leftwards, and the volume of the front cavity 5 of the primary oil cylinder begins to be gradually increased. Meanwhile, the volume of the rear cavity 23 of the primary cylinder gradually decreases, and the primary cylinder barrel 4 begins to retract. Oil in the rear cavity 23 of the primary oil cylinder flows back to an oil tank of the hydraulic system through an oil port connector 10 at the top of the oil cylinder, a vehicle carrying plate of the parking equipment begins to descend until the stroke is completely ended, and a lifting mechanism of the parking equipment completes descending action.

As shown in fig. 5, the hydraulic cylinder of the present invention has an outline structure, and the hydraulic cylinder and the parking equipment are connected through the cylinder holder 22 on the one-level cylinder 4. The piston rod 15 of the secondary cylinder is installed on the column of the parking equipment, so the piston rod port joint 21 at the bottom is kept still in the equipment, while the cylinder top port joint 10 is lifted along with the lifting of the cylinder barrel, which is a characteristic to be noticed when installing oil pipes on the parking equipment.

To sum up, the utility model discloses in, the oil circuit intercommunication is passed through to one-level hydro-cylinder antechamber and second grade hydro-cylinder back chamber, has constituted a built-in independent conversion working oil pocket, does not carry out the fluid exchange with hydraulic system at normal during operation, can realize that one-level hydro-cylinder, second grade hydro-cylinder stretch out and draw back simultaneously, has reached the effect of doing a lot of work doubly, has avoided the design of the complicated oil circuit of each subassembly of hydro-cylinder simultaneously.

Compared with the traditional oil cylinder, the novel hydraulic oil cylinder applied to the parking equipment has the advantages that the two-stage oil cylinder simultaneously performs telescopic action, and the lifting time of the equipment can be obviously shortened within an equivalent stroke; and the ascending speed and the descending speed are equal, the influence of the load of the parking equipment is avoided, the stability of the equipment in the lifting process is improved, and the superiority of the hydraulic drive type simple parking equipment is further improved.

It is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth herein. The present invention is capable of other embodiments and of being practiced and carried out in a variety of ways. The foregoing variations and modifications fall within the scope of the present invention. It will be understood that the invention disclosed and defined herein extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. The embodiments described herein explain the best modes known for practicing the invention and will enable others skilled in the art to utilize the invention.

Claims

1. A novel hydraulic oil cylinder applied to parking equipment is characterized by comprising a primary oil cylinder and a secondary oil cylinder, wherein a primary oil cylinder front cavity and a secondary oil cylinder rear cavity are communicated through an oil way, and a built-in independent conversion working oil cavity is formed.

2. The novel hydraulic cylinder applied to parking equipment as claimed in claim 1, wherein the primary cylinder comprises a primary cylinder barrel, a primary cylinder piston, a primary cylinder cover and a secondary cylinder barrel, the primary cylinder piston is arranged in the primary cylinder barrel, the top end of the primary cylinder barrel is sealed through the primary cylinder cover, and the tail end of the primary cylinder piston is fixedly connected with the secondary cylinder barrel.

3. The novel hydraulic cylinder applied to parking equipment as claimed in claim 2, wherein the primary cylinder cover is provided with a cylinder top oil port connector, and the input and output of oil are performed with a hydraulic system through the cylinder top oil port connector.

4. The novel hydraulic cylinder applied to parking equipment as claimed in claim 2, wherein a through oil injection hole is formed in one end, close to the primary cylinder guide sleeve, of the outer wall of the primary cylinder barrel, and the oil injection hole is sealed through installation of an oil injection hole plug.

5. The novel hydraulic cylinder applied to parking equipment as claimed in claim 2, wherein the outer wall of the piston of the primary cylinder is provided with a primary radial oil through hole, and the liquid in the front cavity of the primary cylinder exchanges oil with the rear cavity of the secondary cylinder through the primary radial oil through hole.

6. The novel hydraulic cylinder applied to parking equipment as claimed in claim 2, wherein the inner wall of the primary cylinder barrel, the outer wall of the secondary cylinder barrel, the inner cavity of the primary cylinder piston and the primary radial oil through hole form a primary cylinder front cavity; the first-stage cylinder barrel, the first-stage oil cylinder piston and the first-stage cylinder cover form a first-stage oil cylinder rear cavity.

7. The novel hydraulic cylinder applied to parking equipment as claimed in claim 1, wherein the secondary cylinder comprises a secondary cylinder barrel, a secondary cylinder piston and a secondary cylinder piston rod, the secondary cylinder piston is arranged in the secondary cylinder barrel, the secondary cylinder piston is fixedly connected with the secondary cylinder piston rod, an axial oil through hole is formed in the center of the secondary cylinder piston rod, a through secondary radial oil through hole is formed in the outer wall of the secondary cylinder piston rod, and the secondary radial oil through hole is communicated with the axial oil through hole.

8. The novel hydraulic cylinder applied to parking equipment as claimed in claim 7, characterized in that the bottom end of the secondary cylinder barrel is fixedly connected with the secondary cylinder piston rod through a secondary cylinder guide sleeve.

9. The novel hydraulic cylinder applied to parking equipment as claimed in claim 7, wherein a bottom port of the piston rod of the secondary cylinder is provided with a bottom port joint of the piston rod, and the input and output of oil are performed with a hydraulic system through the bottom port joint of the piston rod.

10. The novel hydraulic cylinder applied to parking equipment as claimed in claim 7, wherein the axial through hole, the secondary radial through hole, the outer wall of the secondary cylinder piston rod and the inner wall of the secondary cylinder barrel in the secondary cylinder piston rod form a secondary cylinder front cavity; the inner cavities of the secondary oil cylinder, the secondary oil cylinder piston and the primary oil cylinder piston form a secondary oil cylinder rear cavity.