CN216808018U

CN216808018U - Jacking device suitable for industrial vehicle and industrial vehicle

Info

Publication number: CN216808018U
Application number: CN202220259269.1U
Authority: CN
Inventors: 黄强强; 张志宇; 郑亮亮; 杨崇光; 汪秋云; 陈振华
Original assignee: Noblelift Intelligent Equipment Co Ltd
Current assignee: Noblelift Intelligent Equipment Co Ltd
Priority date: 2022-02-09
Filing date: 2022-02-09
Publication date: 2022-06-24
Anticipated expiration: 2032-02-09

Abstract

The utility model relates to the field of automatic mechanical equipment, in particular to an industrial vehicle. The utility model is realized by the following technical scheme: the utility model provides a jacking device suitable for industrial vehicle, contains mount, plays to rise frame and hydro-cylinder, the hydro-cylinder contains to be installed jar seat on the mount and with the piston rod that plays to rise the frame and connect still contains the packing ring, the packing ring passes the piston rod, the packing ring contains lower packing ring and last packing ring, it installs to go up the packing ring play to rise on the frame, lower packing ring is installed on the piston rod. The utility model aims to provide a jacking device suitable for an industrial vehicle and the industrial vehicle, which can control cost, improve practicability, reduce maintenance substitution rate of parts and prolong the service life of the parts on the basis of meeting the power requirement of a lifting frame in a lifting process.

Description

Jacking device suitable for industrial vehicle and industrial vehicle

Technical Field

The utility model relates to the field of automatic mechanical equipment, in particular to an industrial vehicle.

Background

Industrial vehicles refer to power-driven motor vehicles used to carry, jack, tow, lift, stack, or palletize various goods. Common industrial vehicles are forklifts, side forklifts, tractors, trucks, fork lift trucks, and the like.

Industrial vehicles often include components such as body, handles, forks, battery boxes, cylinders, pump stations, controllers, etc. on the structure. For example, chinese patent publication No. cn201220551277.x discloses a small electric cart, which includes a main frame, and a fork and a handle are respectively connected to the main frame. The box part of the main frame forms a containing space, and components such as a pump station, an oil cylinder, a controller and the like are arranged in the containing space.

During the use of the industrial vehicle, a jacking device is needed. The jacking device often adopts the hydro-cylinder, and the hydro-cylinder contains cylinder body and piston rod, and the cylinder body is connected with the mount, and the piston rod is connected with the jacking frame, and along with the periodicity of piston rod, the jacking frame will be in vertical direction elevating movement relative to the mount.

Chinese patent publication No. CN200520119899.5 discloses a breathing type hydraulic damper, in which an oil cylinder of this structure is provided with a steel ball and a steel ball seat at the top end. The oil cylinder arranged on the industrial vehicle usually adopts the structure, the upper end of the piston rod is connected with a steel ball, and a steel ball seat is arranged on a jacking frame of the industrial vehicle. The reason is that in the process of jacking, the fixed frame and the jacking frame have angular swing except for the lifting in the vertical direction. The requirements of the angle swing of the fixed frame and the jacking frame are met by means of the rotation of the steel ball in the steel ball seat.

However, this structure has certain drawbacks.

Firstly, the structure needs to use a steel ball and a steel ball seat, the manufacturing cost of the steel ball seat is high, the installation steps are complex, and the cost of the industrial vehicle using the jacking structure is increased. Secondly, the industrial vehicle using the structure has the problems of long service life, high failure rate and short replacement time of the jacking device.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a jacking device suitable for an industrial vehicle and the industrial vehicle, which can control the cost, improve the practicability, reduce the maintenance substitution rate of parts and prolong the service life of the parts on the basis of meeting the power requirement of a lifting frame in the lifting process.

The utility model provides a jacking device suitable for industrial vehicle, contains mount, plays to rise frame and hydro-cylinder, the hydro-cylinder contains to be installed jar seat on the mount and with the piston rod that plays to rise the frame and connect still contains by the packing ring, the packing ring passes the piston rod, the packing ring contains lower packing ring and last packing ring, it installs to go up the packing ring play to rise on the frame, lower packing ring is installed on the piston rod, the lower surface of going up the packing ring is the pressfitting face, the upper surface of packing ring is for being used for bearing the support the bearing surface of pressfitting face down.

Preferably, the bearing surface and the press-fit surface are both spherical surfaces or both inclined surfaces that are attached to each other.

Preferably, one of the bearing surface and the press-fit surface is a spherical surface, and the other is an inclined surface.

Preferably, the bearing surface is a spherical surface, and the press-fit surface is an inclined surface.

Preferably, a bayonet is arranged on the outer ring of the piston rod, and the lower surface of the lower washer is clamped on the bayonet.

Preferably, the piston rod comprises a hollow inner cavity, and the inner cavity is connected with an oil pipe.

Preferably, the oil pipe is connected to the uppermost end of the piston rod by a hollow bolt.

The industrial vehicle comprises a jacking device, wherein the lifting frame comprises a main frame and vehicle legs, and an upper gasket is connected with the main frame.

Preferably, the fixed frame is connected with a handle and a driving wheel.

Preferably, the pump station is mounted on the main frame.

In conclusion, the utility model has the following beneficial effects:

1. the relative movement between the two washers fulfills the swinging requirement of the piston rod relative to the hoisting frame.

2. The contact area between the two gaskets is large, the pressure intensity is small, the stress is optimized, and the problem that parts are easy to wear due to overlarge pressure intensity is avoided.

3. The upper gasket and the lower gasket are respectively a conical gasket and a spherical gasket, so that proper pressure intensity can be ensured, and unsmooth movement of the piston rod caused by overlarge friction force due to the overlarge adhesion of the two gaskets can be avoided.

4. The two planes of the spherical washer and the conical washer are always attached to the supporting surface of the piston rod and the supporting surface of the lifting frame respectively along with swinging, the spherical surface and the conical surface between the two washers are always attached to slide along with swinging, the washers are guaranteed to be evenly stressed, the counter-force direction of the jacking surface of the oil cylinder is guaranteed to be consistent all the time, and therefore the stability of the lifting process is improved, and the service life of the oil cylinder is prolonged.

5. The oil pipe directly enters the oil cylinder from the pump station through the upper end of the piston rod, and efficient oil supply is achieved. And the total length of the oil pipe is reduced in the oil supply process, and the oil pipe does not bend in the movement process and does not occupy the layout space of electric devices.

Description of the drawings:

FIG. 1 is a schematic diagram of example 1;

FIG. 2 is a schematic illustration of the position of the ram of FIG. 1;

fig. 3 is a schematic view of an upper gasket and a lower gasket.

In the figure:

1. the hydraulic support comprises an oil cylinder, 11, a cylinder seat, 12, a piston rod, 121, an inner cavity, 2, a lower gasket, 21, a bearing surface, 3, an upper gasket, 31, a pressing surface, 41, an oil pipe, 42, a hollow bolt, 51, a lifting frame, 511, a main frame, 512, a vehicle leg, 52, a fixed frame, 53, a driving wheel, 54 and a handle.

Detailed Description

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

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Embodiment 1, an industrial vehicle can be different types of vehicles such as fork truck, fork lift truck, letter sorting car, and this technical scheme takes fork truck as an example.

As shown in fig. 1 and 2, the fixed frame 52 and the lifting frame 51 are two most basic supporting members of the vehicle. The fixed frame 52 is provided with a driving wheel 53 and a handle 54. The hoist frame 51 includes a main frame 511 and legs 512. The lifting power source is an oil cylinder 1, and the oil cylinder 1 comprises a cylinder seat 11 and a piston rod 12. The cylinder base 11 is mounted on the fixed frame 52, and the piston rod 12 is contacted with the main frame 511, so that the lifting frame 51 moves up and down relative to the fixed frame 52 under the action of the oil cylinder 1.

As shown in fig. 2 and 3, the technical solution is characterized in that the upper end of the piston rod 12 is eliminated with the prior art steel ball and steel ball seat structure. But rather a dual gasket configuration is used. Specifically, a through hole is formed in the middle of each of the two washers for the piston rod 12 to pass through. A bayonet is arranged at a certain height position of the piston rod 12 to clamp the lower surface of the lower gasket 2, so that the lower gasket and the piston rod 12 are connected and fixed. The lower surface of the upper gasket 3 presses against the lower gasket 2, and the upper gasket 3 is fixedly coupled to the main frame 511.

In such a configuration, the piston rod 12 needs to oscillate with a small amplitude with respect to the main frame 511 in the process of lifting up the main frame 511 by the piston rod 12. The oscillation no longer requires a steel ball and a steel ball seat but is achieved by means of a relative movement between two washers. In practical industrial applications, 65Mn, i.e. spring steel, may be used as the material of the washer. The two washers still have good reliability and good wear resistance after long-time relative motion.

Firstly, the cost of the gasket is greatly lower than the manufacturing cost of the steel ball and the steel ball seat, and the production cost of the equipment is greatly reduced. Secondly, when the steel ball and the steel ball seat are in contact, the steel ball and the steel ball seat are in point contact, the pressure intensity in the stress process is large, the load of the steel ball and the steel ball seat is large, and the stress is unstable. In the technical scheme, the contact area between the two gaskets is large, the pressure intensity in the stress process is small, and the stress is stable. Thirdly, through the analysis and research of the utility model, the steel ball and the steel ball seat are point contacts, the pressure is high, and the failure rate of the steel ball is high. And the design of using two packing rings, pressure is big, and the part is difficult to wear, so life can prolong.

As shown in fig. 2 and 3, the pressing surface 31 and the supporting surface 21 are bonded and pressed against each other. The present embodiment is a preferred embodiment, and the bearing surface 21 is a spherical surface, and the pressing surface 31 is a plane with an inclined design. The reason for such design is that, if two faces are both planar designs, then in the piston rod lifting process, two faces too fit, and the frictional force is big, is unfavorable for the normal operation of piston rod.

If both surfaces are spherical, the two surfaces may be excessively bonded. To avoid this, spherical surface designs of different diameters can also be used, but such designs increase the number of open molds and the complexity of assembly.

Only two faces are spherical and inclined planes, so that the compression surface is large and stable, and the excessive movement of friction force cannot be blocked due to the fact that the compression surface is not too large.

In the present case, it is particularly envisaged that the lower bearing surface 21 is spherical and the upper press-fit surface 31 is planar, rather than inverted. This is because the lower washer 2 is fixed on the piston rod 12, and the piston rod 12 needs to swing relatively to the ground, so the spherical design of the lower washer 2 is more matched with the motion track of the piston rod 12.

In the choice of actual industry article, lower gasket 2 can select spherical surface gasket, and upper gasket 3 can select conical surface gasket.

As shown in fig. 2, in the present embodiment, a hollow piston rod may be used as the piston rod 12, and the inner cavity 121 is hollow. The main frame 511 is provided with a pump station, one end of the oil pipe 41 is connected with the pump station, and the other end of the oil pipe passes through the hollow bolt 42 and the inner cavity 121 and is connected with the upper end of the inner cavity 121. The design enables oil in the pump station to directly enter the oil cylinder through the oil pipe 41.

In the prior art, the steel ball is arranged at the top end of the piston rod 12, so that an oil path cannot enter from the top end. An oil inlet and an oil outlet are required to be arranged on the cylinder barrel of the oil cylinder, and then the oil cylinder is connected with a pump station through an external oil pipe. Therefore, two defects exist, on one hand, in the lifting process of the frame, the cylinder barrel and the pump station of the oil cylinder are relatively lifted, the oil pipe is frequently bent, and the service life of the oil pipe is damaged. On the other hand, due to the relative lifting, the oil pipe needs a certain reserved movement length, and the total length of the oil pipe is increased. And a plurality of electric devices and electric appliance connecting wires are arranged near the cylinder barrel of the oil cylinder, so that the arrangement of an overlong oil pipe is more inconvenient.

In the present case, due to the washer form, any height position relative to the piston rod can be flexibly selected without occupying a top space, which provides a possibility for the oil pipe 41 to enter the inner cavity 121 through the piston rod 12. The oil pipe does not need to occupy the layout space of the electric devices below the oil cylinder 1. And the piston rod 12 and the main frame 511 are synchronously lifted, and do not have relative lifting movement, the oil pipe does not need to be bent, the oil cylinder is not easy to leak oil, and the working state is more efficient and stable.

Example 2 differs from example 1 in that both the bearing surface 21 and the press-fit surface 31 are of inclined planar design. The upper gasket 3 and the lower gasket 2 may be tapered gaskets.

Embodiment 3 differs from embodiment 1 in that the bearing surface 21 and the press-fit surface 31 are both designed as spherical surfaces, and the upper gasket 3 and the lower gasket 2 can be different-diameter spherical gaskets.

Example 4 is different from example 1 in that the upper gasket 3 is a spherical gasket and the lower gasket 2 is a tapered gasket.

Claims

1. The utility model provides a jacking device suitable for industrial vehicle, contains mount (52), hoisting frame (51) and hydro-cylinder (1), hydro-cylinder (1) contain install jar seat (11) on mount (52) and with piston rod (12) that hoisting frame (51) are connected, its characterized in that still contains the packing ring, piston rod (12) pass the packing ring, the packing ring contains lower packing ring (2) and last packing ring (3), it installs to go up packing ring (3) on hoisting frame (51), lower packing ring (2) are installed on piston rod (12), the lower surface of going up packing ring (3) is pressfitting face (31), the upper surface of lower packing ring (2) is for being used for the bearing face (21) of bearing said pressfitting face (31).

2. Jacking device suitable for industrial vehicles, according to claim 1, characterized in that: the bearing surface (21) and the pressing surface (31) are both spherical surfaces or both mutually attached inclined surfaces.

3. Jacking device suitable for industrial vehicles, according to claim 1, characterized in that: one of the bearing surface (21) and the pressing surface (31) is a spherical surface, and the other one is an inclined surface.

4. Jacking device suitable for industrial vehicles, according to claim 3, characterized in that: the bearing surface (21) is a spherical surface, and the pressing surface (31) is an inclined surface.

5. Jacking device suitable for industrial vehicles, according to any one of claims 1 to 4, characterized in that: the piston rod (12) is characterized in that a bayonet is arranged on the outer ring of the piston rod, and the lower surface of the lower gasket (2) is clamped on the bayonet.

6. Jacking apparatus for industrial vehicles, according to any one of claims 1 to 4, characterized in that: the piston rod (12) comprises a hollow inner cavity (121), and the inner cavity (121) is connected with the oil pipe (41).

7. Jacking device suitable for industrial vehicles, according to claim 6, characterized in that: the oil pipe (41) is connected with the uppermost end of the piston rod (12) through a hollow bolt (42).

8. An industrial vehicle comprising a jacking device according to any one of claims 1 to 7, characterized in that: the lifting frame (51) comprises a main frame (511) and vehicle legs (512), and the upper gasket (3) is connected with the main frame (511).

9. An industrial vehicle as claimed in claim 8 wherein: the fixed frame (52) is connected with a handle (54) and a driving wheel (53).

10. An industrial vehicle as claimed in claim 8 wherein: the pump station is arranged on the main frame (511).