CN218971552U

CN218971552U - Forklift forward oil cylinder

Info

Publication number: CN218971552U
Application number: CN202223507898.0U
Authority: CN
Inventors: 蒋先江; 毛永; 唐浪; 陈松
Original assignee: Zhejiang Ingenuity Hydraulic Technology Co ltd
Current assignee: Zhejiang Ingenuity Hydraulic Technology Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-05
Anticipated expiration: 2032-12-28

Abstract

The utility model relates to parts of a forklift, in particular to a forklift forward-moving oil cylinder which comprises a cylinder body, a cylinder bottom, a cylinder cover, a piston and a piston rod, wherein a guide sleeve is arranged between the cylinder cover and the cylinder body, a first compression-expansion one-way valve and a central buffer hole are arranged on the end face of the cylinder bottom, a second compression-expansion one-way valve is arranged on the end face of the guide sleeve, a buffer shaft matched with the central buffer hole is arranged on the inner side of the front end of the piston rod, the first compression-expansion one-way valve is communicated with the central buffer hole, the piston is arranged on the outer side of the front end of the piston rod, and a buffer sleeve matched with the piston is arranged on the piston rod. According to the utility model, the compression-expansion type one-way valves are respectively arranged on the guide sleeve and the cylinder bottom, and the buffer shaft and the buffer sleeve are arranged on the piston rod, so that the piston rod can be buffered when contracted and stretched, the oil cylinder has a bidirectional buffer effect, and the starting pressure can be reduced.

Description

Forklift forward oil cylinder

Technical Field

The utility model relates to a part of a forklift, in particular to a forward cylinder of the forklift.

Background

The front fork truck forward-moving oil cylinder is a special part for driving the front of the fork truck to move back and forth, and in the process of driving the front of the fork truck to move back and forth in a bidirectional manner, a certain buffering effect is needed to buffer, and the conventional front fork truck forward-moving oil cylinder generally only has a unidirectional buffering effect due to the internal structural layout and has larger starting pressure.

Disclosure of Invention

In order to solve the defects and shortcomings in the prior art, the utility model provides the forklift forward cylinder, which is characterized in that the compression-expansion type one-way valves are respectively arranged on the guide sleeve and the cylinder bottom, and the buffer shaft and the buffer sleeve are arranged on the piston rod, so that the buffer effect can be achieved when the piston rod is contracted and stretched out, the cylinder has a bidirectional buffer effect, and the starting pressure can be reduced.

The technical scheme of the utility model is as follows: the utility model provides a fork truck forward cylinder, includes cylinder body, cylinder bottom, cylinder cap, piston and piston rod, be equipped with the uide bushing between cylinder cap and the cylinder body, the terminal surface of cylinder bottom is equipped with first pressure expansion check valve and central buffering hole, the terminal surface of uide bushing is equipped with the second and presses expansion check valve, the front end inboard of piston rod is equipped with the buffering axle that cooperates the central buffering hole, first pressure expansion check valve and central buffering hole intercommunication, the piston is installed in the front end outside of piston rod, be equipped with the buffering cover that cooperates the piston on the piston rod.

According to the utility model, the compression-expansion type one-way valves are respectively arranged on the guide sleeve and the cylinder bottom, and the buffer shaft and the buffer sleeve are arranged on the piston rod, so that the piston rod can be buffered when contracted and stretched, the oil cylinder has a bidirectional buffer effect, and the starting pressure can be reduced.

Preferably, the piston and the cylinder body are supported by a supporting ring and sealed by a Gelai ring, the piston and the piston rod are connected by threads and are fixed and loose-proof by an inner hexagonal flat end set screw, and the buffer shaft is arranged on an inner hole of the piston rod and limited by a steel wire retainer ring.

Preferably, the piston is provided with a supporting ring mounting groove, the supporting ring mounting groove is provided with a threaded hole matched with an inner hexagonal flat end screw, the piston rod is provided with a limiting step matched with the piston and a buffer sleeve, the buffer sleeve is limited through the end face of the piston and the limiting step, and a first O-shaped ring is arranged between the inner hole of the buffer sleeve and the limiting step and between the piston and the limiting step.

Preferably, the cylinder bottom is provided with a first oil passing groove matched with the first compression-expansion type one-way valve, the guide sleeve is provided with a second oil passing groove matched with the second compression-expansion type one-way valve, the cylinder body is provided with an oil passing hole matched with the second oil passing groove, and a second O-shaped ring, a third O-shaped ring and a baffle matched with the second O-shaped ring are arranged between the guide sleeve and the cylinder body.

Preferably, the second O-shaped ring and the third O-shaped ring are respectively positioned at two sides of the second oil passing groove, and a sealing ring for a shaft and a Style seal are arranged between the guide sleeve and the piston rod.

Preferably, the rear end of the piston rod is provided with a first joint bearing, a first elastic retainer ring for a hole and a first straight-through type pressure oil injection cup, and the cylinder bottom is provided with a second joint bearing, a second elastic retainer ring for a hole and a second straight-through type pressure oil injection cup.

Preferably, the cylinder cover and the cylinder body are connected through threads, the cylinder bottom and the cylinder body are welded together, and a dust ring is arranged between the cylinder cover and the piston rod.

Drawings

FIG. 1 is a schematic view, partially in section, of the present utility model;

FIG. 2 is a schematic view, partially in section, of the present utility model;

in the figure, 1, a first straight-through type compression oil injection cup, 2, a first hole is used as a circlip, 3, a first joint bearing, 4, a dust ring, 5, a cylinder cover, 6, a shaft is used as a sealing ring, 7, a guide sleeve, 8, a Style seal, 9, a baffle plate, 10, a first O-shaped ring, 11, a piston rod, 12, a cylinder body, 13, a buffer sleeve, 14, a Gellan ring, 15, a support ring, 16, a piston, 17, a hexagon-shaped flat end set screw, 18, a wire retainer ring, 19, a buffer shaft, 20, a second O-shaped ring, 21, a third O-shaped ring, 22, a first compression expansion type one-way valve, 23, a second compression type one-way valve, 24, a second straight-through type compression oil injection cup, 25, a second hole is used as a circlip, 26, a second joint bearing, 27, a cylinder bottom, 28, a center buffer, 29, a first oil passing groove, 30 and a second oil passing groove.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings, without limiting the scope of the utility model.

As shown in fig. 1 and 2, a forklift forward cylinder comprises a cylinder body 12, a cylinder bottom 27, a cylinder cover 5, a piston 16 and a piston rod 11, wherein a guide sleeve 7 is arranged between the cylinder cover 5 and the cylinder body 12, a first compression-expansion check valve 22 and a central buffer hole 28 are arranged on the end face of the cylinder bottom 27, a second compression-expansion check valve 23 is arranged on the end face of the guide sleeve 7, a buffer shaft 19 matched with the central buffer hole 28 is arranged on the inner side of the front end of the piston rod 11, the first compression-expansion check valve 22 is communicated with the central buffer hole 28, the piston 16 is arranged on the outer side of the front end of the piston rod 11, and a buffer sleeve 13 matched with the piston 16 is arranged on the piston rod 11. The piston 16 and the cylinder body 12 are supported by a supporting ring 15 and sealed by a Gelai ring 14, the piston 16 and the piston rod 11 are connected by threads and are fixed and loose-proof by a hexagon flat end set screw 17, and a buffer shaft 19 is arranged on the inner hole of the piston rod 11 and limited by a steel wire check ring 18. The piston 16 is provided with a supporting ring mounting groove, the supporting ring mounting groove is provided with a threaded hole matched with an inner hexagonal flat end screw 17, the piston rod 11 is provided with a limiting step matched with the piston 16 and the buffer sleeve 13, the buffer sleeve 13 is limited through the end face of the piston 16 and the limiting step, and a first O-shaped ring 10 is arranged between the inner hole of the buffer sleeve 13 and the limiting step and between the piston 16 and the limiting step. The cylinder bottom 27 is provided with a first oil passing groove 29 matched with the first compression-expansion type one-way valve 22, the guide sleeve 7 is provided with a second oil passing groove 30 matched with the second compression-expansion type one-way valve 23, the cylinder body 12 is provided with an oil passing hole matched with the second oil passing groove 30, and a second O-shaped ring 20, a third O-shaped ring 21 and a baffle 9 matched with the second O-shaped ring 20 are arranged between the guide sleeve 7 and the cylinder body 12. The second O-ring 20 and the third O-ring 21 are respectively positioned at two sides of the second oil passing groove 30, and a shaft sealing ring 6 and a Style seal 8 are arranged between the guide sleeve 7 and the piston rod 11. The rear end of the piston rod 11 is provided with a first joint bearing 3, a first hole elastic retainer ring 2 and a first straight-through type pressure oil injection cup 1, and a cylinder bottom 27 is provided with a second joint bearing 26, a second hole elastic retainer ring 25 and a second straight-through type pressure oil injection cup 24. The cylinder cover 5 is connected with the cylinder body 12 through threads, the cylinder bottom 27 is welded with the cylinder body 12, and a dust ring 4 is arranged between the cylinder cover 5 and the piston rod 11.

The assembly and working principle of the utility model are as follows:

the piston and the cylinder body are supported by the support ring and sealed by the Gelai ring, the piston and the piston rod are connected by threads, the mounting groove of the support ring is internally provided with the threaded hole for mounting the set screw, the set screw plays a role of looseness prevention, the buffer shaft is mounted on the inner hole of the piston rod and connected by the steel wire check ring, the buffer sleeve is mounted on the limit step of the piston rod, the end face of the piston and the limit step limit the buffer sleeve, and a first O-shaped ring is arranged between the inner hole of the buffer sleeve and the limit step of the piston rod and between the piston and the limit step of the piston rod for sealing.

The cylinder body and the cylinder bottom are formed by welding two hard pipes, oil inlets are respectively arranged on the hard pipes, the center of the end face of the cylinder bottom is perforated to form a central buffer hole, the central buffer hole is in clearance fit with a buffer shaft, the cylinder is contracted to the bottom to play a buffering role, the end face of the cylinder bottom is provided with a first expansion type one-way valve, the first expansion type Shan Shanxiang valve is opened when the cylinder just starts to extend, hydraulic oil enters a rodless cavity, and compared with the cylinder without the one-way valve, the starting pressure is reduced. The cylinder cap department is equipped with dustproof round and plays dustproof effect, cylinder cap and cylinder body threaded connection are equipped with the sealing washer for the axle and the sealing washer is sealed to the ste between uide bushing and the piston rod, the uide bushing is equipped with second O type circle and second O type circle with the cylinder body and seals, install the inslot of second O type circle and be equipped with the separation blade, the uide bushing material is the ductile iron, lubricated guiding effect, uide bushing hole step plays the cushioning effect with the cushion collar cooperation, the hydro-cylinder stretches out when reaching the top, be equipped with the second on the step and cross the oil groove, uide bushing terminal surface installation second presses the one-way valve that rises, the hydro-cylinder is retracted to go to open in the twinkling of an eye the one-way valve, compared with the hydro-cylinder that does not have the one-way valve and start pressure reduction.

When the parts are assembled, the surfaces matched with each other are coated with lubricating oil, and each sealing piece cannot be scratched or scratched. After assembly, the oil cylinder moves smoothly in the whole stroke, and the phenomena of blocking and jamming cannot be caused. The assembled oil cylinder is subjected to a pressure-resistant test according to GB/T15622-1995 (delivery test of the hydraulic cylinder), and the test pressure is as follows: 28MPa, the lowest start-up pressure being 0.4MPa. And after the test is qualified, the oil inlet is provided with a protection bolt.

Claims

1. The utility model provides a fork truck forward cylinder, includes cylinder body, cylinder bottom, cylinder cap, piston and piston rod, its characterized in that: be equipped with the uide bushing between cylinder cap and the cylinder body, the terminal surface of cylinder bottom is equipped with first pressure and rises formula check valve and central buffering hole, the terminal surface of uide bushing is equipped with the second pressure and rises formula check valve, the front end inboard of piston rod is equipped with the buffering axle that cooperates the central buffering hole, first pressure and rise formula check valve and central buffering hole intercommunication, the piston is installed in the front end outside of piston rod, be equipped with the buffering cover that cooperates the piston on the piston rod.

2. The forklift forward cylinder as claimed in claim 1, wherein: the piston is supported by the support ring and sealed by the Gelai ring, the piston is connected with the piston rod by threads and is fixed and loose-proof by the inner hexagonal flat end set screw, and the buffer shaft is arranged on the inner hole of the piston rod and is limited by the steel wire retainer ring.

3. The forklift forward cylinder as claimed in claim 2, wherein: be equipped with the supporting ring mounting groove on the piston, be equipped with the screw hole of cooperation hexagon flat end screw on the supporting ring mounting groove, be equipped with on the piston rod on the spacing step of cooperation piston and cushion collar, the cushion collar is spacing through terminal surface and the spacing step of piston, all be equipped with first O type circle between cushion collar hole and the spacing step, between piston and the spacing step.

4. The forklift forward cylinder as claimed in claim 1, wherein: the cylinder bottom is provided with a first oil passing groove matched with a first compression-expansion type one-way valve, the guide sleeve is provided with a second oil passing groove matched with a second compression-expansion type one-way valve, the cylinder body is provided with an oil passing hole matched with the second oil passing groove, and a second O-shaped ring, a third O-shaped ring and a baffle matched with the second O-shaped ring are arranged between the guide sleeve and the cylinder body.

5. The forklift forward cylinder as claimed in claim 4, wherein: the second O-shaped ring and the third O-shaped ring are respectively positioned at two sides of the second oil passing groove, and a sealing ring and a Style seal for a shaft are arranged between the guide sleeve and the piston rod.

6. The forklift forward cylinder as claimed in claim 1, wherein: the rear end of the piston rod is provided with a first joint bearing, a first elastic retainer ring for a hole and a first straight-through type pressure oil injection cup, and the cylinder bottom is provided with a second joint bearing, a second elastic retainer ring for a hole and a second straight-through type pressure oil injection cup.

7. The forklift forward cylinder as claimed in claim 1, wherein: the cylinder cover is connected with the cylinder body through threads, the cylinder bottom is welded with the cylinder body, and a dust ring is arranged between the cylinder cover and the piston rod.