CN209989028U - Low-noise oil cylinder for forklift - Google Patents

Abstract

The utility model discloses a low noise hydro-cylinder for fork truck, including cylinder, piston and piston rod, the oilhole that is used for letting in and discharging hydraulic oil is offered to the cylinder bottom, the inside spacing ring piece that has of cylinder, the inside amortization breather that is provided with of spacing ring piece top cylinder lateral wall, amortization breather includes casing, first baffle, second baffle and third baffle, form first cavity between first baffle and the second baffle, form the second cavity between second baffle and the third baffle. The utility model discloses a breather pipe, with the cylinder in the piston headspace gaseous discharge to the second cavity inside, gaseous through the bounce-back of second baffle, inside the air vent entered into first cavity again, discharge after the through-hole entered into spiral breather pipe at last, gaseous in this in-process, through repetitious bounce-back and combine spiral breather pipe's use, effectively increased gaseous movement distance to can make the noise decay.

Description

Low-noise oil cylinder for forklift

Technical Field

The utility model relates to an oil cylinder equipment technical field, in particular to low noise hydro-cylinder for fork truck.

Background

The hydraulic cylinder is a linear motion type executing element with output force being in direct proportion to the effective area of a piston and pressure difference between the effective area and the two sides of the piston, the hydraulic cylinder has the functions of converting hydraulic energy into mechanical energy, the input quantity of the hydraulic cylinder is the flow and the pressure of fluid, the output is linear motion speed and force, the piston of the hydraulic cylinder can complete linear reciprocating motion, the output linear displacement is limited, the hydraulic cylinder is an energy conversion device for converting the hydraulic energy into the mechanical energy of the reciprocating linear motion, the application range of the existing hydraulic cylinder is wide, the hydraulic cylinders used in different fields are different, a forklift is required to be used in a factory, some forklifts are driven by a motor and a chain, and other forklifts are directly driven by the hydraulic cylinder, the hydraulic cylinder used by the existing forklift is provided with a ventilation hole on the side surface of the top end, and the gas pressure near the ventilation hole is, pressure waves are generated, so that strong noise is radiated, and meanwhile, dust in the air enters the cylinder barrel of the oil cylinder through the ventilating holes, so that the service life of the oil cylinder is shortened.

Therefore, it is necessary to provide a low noise cylinder for a forklift truck to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fork truck is with low noise hydro-cylinder to solve the big and short problem of life of the noise that provides in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a low-noise oil cylinder for a forklift comprises a cylinder barrel, a piston and a piston rod, wherein an oil hole for introducing and discharging hydraulic oil is formed in the bottom end of the cylinder barrel, a limit ring block is arranged inside the cylinder barrel, a silencing and air-exchanging device is arranged inside the side wall of the cylinder barrel at the top end of the limit ring block and comprises a shell, a first baffle plate, a second baffle plate and a third baffle plate, a first cavity is formed between the first baffle plate and the second baffle plate, a second cavity is formed between the second baffle plate and the third baffle plate, an air pipe is arranged inside the first cavity, two ends of the air pipe are respectively communicated with the second cavity and an inner cavity of the cylinder barrel, a spiral air pipe is arranged inside the first cavity, one end of the spiral air pipe is communicated with the first cavity, the other end of the spiral air pipe penetrates through the third baffle plate, and a plurality of through holes are formed, and the second baffle is internally provided with a vent hole for air circulation between the first cavity and the second cavity.

Preferably, felt is adhered to two side surfaces of the first baffle, the second baffle and the third baffle.

Preferably, a filtering sponge for filtering air is placed on one side of the third baffle in a matching manner.

Preferably, a filter screen is arranged on one side of the filter sponge, and a fixing device for fixing the filter screen is arranged in the shell.

Preferably, the fixing device comprises a fixing shell, a spring is fixedly connected inside the fixing shell, and a clamping block is fixedly connected to one end of the spring.

Preferably, grooves are formed in two sides of the filter screen, and the grooves are matched with the clamping blocks.

The utility model discloses a technological effect and advantage:

1. the utility model discloses through the trachea, with the cylinder in the gas discharge of piston headspace inside the second cavity, gas is through the bounce-back of second baffle, enter into inside the first cavity through the gas vent again, at last through the through-hole enter into spiral breather pipe after discharge, gas is in this in-process, through repetitious bounce-back and combine the use of spiral breather pipe, gas's movement distance has effectively been increased, thereby can make the noise decay, simultaneously gas is in the bounce-back in-process, can make the sound wave of some frequency reflect back along the direction of biogenesis, thereby can further noise reduction;

2. the utility model discloses a be provided with filter screen and filter sponge, the filter screen can be effectual big impurity in the filtered air, the filter sponge that lies in filter screen one side simultaneously can the filtered air tiny dust, effectively reduce during the dust gets into the cylinder to can improve the life of hydro-cylinder, when needs change filter sponge, only need stimulate the filter screen hard toward the outside, can make fixing device well spring take place deformation, the spring drives the fixture block and breaks away from the recess, and then can take out the filter screen, convenient in changing filter sponge.

Drawings

Fig. 1 is a schematic view of the overall front view section of the present invention.

Fig. 2 is a schematic structural view of the silencing and ventilating device of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2 according to the present invention.

In the figure: 1 cylinder barrel, 2 pistons, 3 piston rods, 4 oil holes, 5 limit ring blocks, 6 shells, 7 first baffle plates, 8 second baffle plates, 9 third baffle plates, 10 first cavities, 11 second cavities, 12 vent pipes, 13 spiral vent pipes, 14 through holes, 15 vent holes, 16 felts, 17 filter sponges, 18 filter screens, 19 fixing shells, 20 springs, 21 fixture blocks and 22 grooves.

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 work belong to the protection scope of the present invention.

The utility model provides a low noise oil cylinder for forklift shown in figures 1-3, which comprises a cylinder barrel 1, a piston 2 and a piston rod 3, wherein the bottom end of the cylinder barrel 1 is provided with an oil hole 4 for introducing and discharging hydraulic oil, the inside of the cylinder barrel 1 is provided with a limit ring block 5, the inside of the side wall of the cylinder barrel 1 at the top end of the limit ring block 5 is provided with a silencing and air exchanging device, the silencing and air exchanging device comprises a shell 6, a first baffle 7, a second baffle 8 and a third baffle 9, a first cavity 10 is formed between the first baffle 7 and the second baffle 8, a second cavity 11 is formed between the second baffle 8 and the third baffle 9, a vent pipe 12 is arranged inside the first cavity 10, two ends of the vent pipe 12 are respectively communicated with the second cavity 11 and the inner cavity of the cylinder barrel 1, a spiral vent pipe 13 is arranged inside the first cavity 10, one end of the spiral vent pipe 13 is communicated with the first cavity 10, the other end of the spiral vent pipe 13 penetrates through the third baffle plate 9, a plurality of through holes 14 are formed in the surface of the end part of the spiral vent pipe 13 inside the first cavity 10, and vent holes 15 used for air circulation between the first cavity 10 and the second cavity 11 are formed inside the second baffle plate 8.

Further, in the above technical solution, the felt 16 is adhered to the two side surfaces of the first baffle 7, the second baffle 8 and the third baffle 9, and the felt 16 can effectively absorb noise;

furthermore, in the above technical scheme, a filtering sponge 17 for filtering air is placed on one side of the third baffle 9 in a matching manner, and the filtering sponge 17 can filter fine dust in the air, so that the dust is prevented from entering the cylinder barrel 1, and the service life of the oil cylinder is prolonged;

further, in the above technical solution, a filter screen 18 is disposed on one side of the filter sponge 17, and a fixing device for fixing the filter screen 18 is disposed inside the housing 6;

further, in the above technical solution, the fixing device includes a fixing shell 19, a spring 20 is fixedly connected inside the fixing shell 19, and a clamping block 21 is fixedly connected to one end of the spring 20;

further, in the above technical solution, two sides of the filter screen 18 are provided with grooves 22, and the grooves 22 are matched with the fixture blocks 21.

This practical theory of operation:

referring to the attached drawings 1-2 of the specification, hydraulic oil is introduced through the oil hole 4 to drive the piston 2 to move upwards, the piston 2 moves upwards to enable gas in the cylinder barrel 1 to be discharged into the second cavity 11 through the vent pipe 12, rebound through the second baffle plate 8, enter the first cavity 10 through the vent hole 15, and finally enter the spiral vent pipe 13 through the through hole 14 to be discharged, and the gas is rebounded for multiple times and discharged through the spiral vent pipe 13 in the process, so that the movement distance of the gas is effectively increased, noise attenuation can be realized, and meanwhile, sound waves with certain frequencies can be reflected back along the direction of a biogenesis in the rebounding process of the gas, so that the noise can be further reduced;

refer to description figure 1 and figure 3, through being provided with filter screen 18 and filter sponge 17, filter screen 18 can be effectual big impurity in the filtered air, filter sponge 17 that is located filter screen 18 one side simultaneously can filter the tiny dust in the air, effectively reduce during the dust gets into cylinder 1, thereby can improve the life of hydro-cylinder, when needs change filter sponge 17, only need to stimulate filter screen 18 hard toward the outside, can make fixing device well spring 20 take place deformation, spring 20 drives fixture block 21 and breaks away from recess 22, and then can take out filter screen 18, it is convenient in changing filter sponge 17.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (6)

1. The utility model provides a fork truck is with low noise hydro-cylinder, includes cylinder (1), piston (2) and piston rod (3), its characterized in that: the oil hole (4) used for introducing and discharging hydraulic oil is formed in the bottom end of the cylinder barrel (1), the limiting ring block (5) is arranged inside the cylinder barrel (1), the silencing and air-exchanging device is arranged inside the side wall of the cylinder barrel (1) at the top end of the limiting ring block (5), the silencing and air-exchanging device comprises a shell (6), a first baffle plate (7), a second baffle plate (8) and a third baffle plate (9), a first cavity (10) is formed between the first baffle plate (7) and the second baffle plate (8), a second cavity (11) is formed between the second baffle plate (8) and the third baffle plate (9), an air vent pipe (12) is arranged inside the first cavity (10), two ends of the air vent pipe (12) are respectively communicated with the second cavity (11) and the inner cavity of the cylinder barrel (1), a spiral air vent pipe (13) is arranged inside the first cavity (10), one end of the spiral air vent pipe (13) is communicated with the first cavity, the other end of the spiral vent pipe (13) penetrates through the third baffle plate (9), a plurality of through holes (14) are formed in the end surface of the spiral vent pipe (13) inside the first cavity (10), and vent holes (15) used for enabling the first cavity (10) and the second cavity (11) to be communicated with air are formed inside the second baffle plate (8).

2. The low noise cylinder for forklift according to claim 1, characterized in that: and felts (16) are adhered to the surfaces of the two sides of the first baffle (7), the second baffle (8) and the third baffle (9).

3. The low noise cylinder for forklift according to claim 1, characterized in that: and a filtering sponge (17) for filtering air is arranged on one side of the third baffle (9) in a matching way.

4. The low noise cylinder for forklift according to claim 3, characterized in that: a filter screen (18) is arranged on one side of the filter sponge (17), and a fixing device for fixing the filter screen (18) is arranged in the shell (6).

5. The low noise cylinder for forklift according to claim 4, characterized in that: the fixing device comprises a fixing shell (19), a spring (20) is fixedly connected inside the fixing shell (19), and a clamping block (21) is fixedly connected to one end of the spring (20).

6. The low noise cylinder for forklift according to claim 4, characterized in that: grooves (22) are formed in two sides of the filter screen (18), and the grooves (22) are matched with the clamping blocks (21).

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