CN218478505U - Fork truck plays to rise hydro-cylinder decline buffer control system - Google Patents
Fork truck plays to rise hydro-cylinder decline buffer control system Download PDFInfo
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- CN218478505U CN218478505U CN202222140306.XU CN202222140306U CN218478505U CN 218478505 U CN218478505 U CN 218478505U CN 202222140306 U CN202222140306 U CN 202222140306U CN 218478505 U CN218478505 U CN 218478505U
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Abstract
The application discloses a descending buffer control system of a forklift lifting oil cylinder, which relates to the technical field of hydraulic oil cylinders and comprises a cylinder body and a piston assembly, wherein the cylinder body comprises a cylinder bottom and a cylinder barrel, and the piston assembly comprises a piston and a piston rod; a first cavity is formed between the outer wall of the piston rod and the inner wall of the cylinder barrel, and a second cavity is formed between the piston and the cylinder bottom; the piston is characterized in that a buffer column is arranged on one side of the cylinder bottom facing the piston, a buffer sleeve is arranged on the inner wall of the piston, when the outer wall of the buffer column is sleeved with the buffer sleeve, a damping gap is formed between the buffer sleeve and the buffer column, a buffer cavity is formed by enclosing the piston and the buffer column, and the buffer cavity is communicated with the damping gap. This application can carry out effectual buffering at the hydro-cylinder descending stroke end, improves hydro-cylinder life.
Description
Technical Field
The application relates to the technical field of hydraulic oil cylinders, in particular to a descending buffer control system of a lifting oil cylinder of a forklift.
Background
In the quick descending process of the forklift lifting oil cylinder, great impact, noise and collision can be generated at the tail end of the stroke, but the buffering effect at the tail end of the stroke cannot necessarily meet the requirement due to the limitation of the inner space of the hydraulic cylinder. Especially, when the hydraulic cylinder drives a load with large mass, the kinetic energy is overlarge, so that the phenomenon of violent impact among the piston, the cylinder bottom and the guide sleeve can be generated at the tail end of the stroke, and the normal service life and the precision of the hydraulic cylinder are greatly influenced.
SUMMERY OF THE UTILITY MODEL
In order to cushion the end of the descending stroke of the oil cylinder and prolong the service life of the oil cylinder, the application provides a descending buffering control system of a forklift lifting oil cylinder. The following technical scheme is adopted:
a forklift lifting oil cylinder descending buffer control system comprises a cylinder body and a piston assembly, wherein the cylinder body comprises a cylinder bottom and a cylinder barrel, and the cylinder bottom is connected to one end of the cylinder barrel; the piston assembly comprises a piston and a piston rod, the piston is movably arranged in the cylinder barrel, one end of the piston rod is connected with the piston, and the other end of the piston rod penetrates out of the cylinder barrel; a first cavity is formed between the outer wall of the piston rod and the inner wall of the cylinder barrel, and a second cavity is formed between the piston and the cylinder bottom; the first cavity is communicated with the second cavity;
the piston is characterized in that a buffer column is arranged on one side, facing the piston, of the cylinder bottom, a buffer sleeve is arranged on the inner wall of the piston, when the buffer column is sleeved with the buffer sleeve, a damping gap is formed between the buffer sleeve and the buffer column, a buffer cavity is formed between the piston and the buffer column, and the buffer cavity is communicated with the damping gap.
Optionally, a communicating oil path for communicating the first cavity with the second cavity is formed in the piston; the cylinder bottom is provided with an oil inlet and an oil outlet, and an oil inlet and outlet duct which is communicated with the oil inlet and the oil outlet and the second cavity.
Optionally, at least two oil inlet and outlet passages are arranged at intervals along the circumferential direction of the cylinder body.
Optionally, the oil inlet and outlet duct is inclined from the middle of the cylinder bottom toward the second cavity, and communicates the oil inlet and outlet with the second cavity.
Optionally, the communicating oil path is L-shaped, one end of the communicating oil path is communicated with the first cavity, and the other end of the communicating oil path is communicated with the second cavity.
Optionally, a sealing plug is arranged on one side of the piston, which is far away from the buffer column, of the buffer sleeve.
Optionally, a sealing ring is arranged between the sealing plug and the piston.
Optionally, one end of the cylinder barrel, which is far away from the cylinder bottom, is connected with a cylinder cover, and one end of the piston rod, which is far away from the piston, penetrates out of the cylinder cover.
Optionally, a support ring is embedded in the outer wall of the periphery of the piston.
Optionally, the buffer column is integrally connected with the cylinder bottom.
To sum up, the present application includes the following beneficial effects:
at the tail end of the descending stroke of the oil cylinder, when the buffering sleeve is sleeved on the buffering column, hydraulic oil in the buffering cavity flows out through the damping gap, and the retracted piston assembly is buffered in the process, so that the collision impact force is reduced, and the service life of the oil cylinder is prolonged.
Drawings
Fig. 1 is an overall sectional view of the present embodiment.
Description of reference numerals: 1. a cylinder bottom; 2. a piston; 3. a buffer sleeve; 4. sealing the plug; 5. a piston rod; 6. a cylinder barrel; 7. a cylinder cover; 8. a seal ring; 9. a buffer cavity; 10. a damping gap; 11. a support ring; 12. an oil way is communicated; 13. an oil inlet and outlet duct; 14. an oil inlet and an oil outlet; 15. a first cavity; 16. a second cavity; 17. and (7) buffering the column.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses fork truck plays to rise hydro-cylinder decline buffer control system, including cylinder body and 2 subassemblies of piston, the cylinder body includes cylinder bottom 1 and cylinder 6, and cylinder bottom 1 is connected in the one end of cylinder 6, and the one end that cylinder bottom 1 was kept away from to cylinder 6 is connected with cylinder cap 7. The 2 subassemblies of piston include piston 2 and piston rod 5, and the piston 2 activity is in cylinder 6, and the one end and the piston 2 of piston rod 5 are connected, and the other end is worn out the cylinder cap 7 outside. A first cavity 15 is formed between the outer wall of the piston rod 5 and the inner wall of the cylinder barrel 6, and a second cavity 16 is formed between the piston 2 and the cylinder bottom 1. The first chamber 15 communicates with the second chamber 16.
A communicating oil path 12 for communicating the first cavity 15 and the second cavity 16 is formed in the piston 2, and the communicating oil path 12 is L-shaped and can be conveniently processed; one end of which communicates with the first chamber 15 and the other end of which communicates with the second chamber 16.
The cylinder bottom 1 is provided with an oil inlet and outlet 14 and an oil inlet and outlet duct 13 for communicating the oil inlet and outlet 14 with a second cavity 16. The oil inlet and outlet 14 is opened at the center of the cylinder bottom 1, and at least two, in this embodiment four, oil inlet and outlet channels 13 are provided at equal intervals along the circumferential direction of the cylinder body. The oil inlet and outlet passage 13 is inclined from one side of the oil inlet and outlet port 14 toward the second chamber 16.
A buffer column 17 is integrally connected to the side of the cylinder bottom 1 facing the piston 2. The piston 2 is of a hollow structure, the inner wall of the piston is fixedly provided with a buffer sleeve 3, when the buffer sleeve 3 is sleeved on the outer wall of the buffer column 17, a damping gap 10 is formed between the buffer sleeve 3 and the buffer column 17, and a buffer cavity 9 is formed between the piston 2 and the buffer column 17; the buffer cavity 9 is communicated with the damping gap 10, so that hydraulic oil in the buffer cavity 9 can flow out from the damping gap 10 to play a role in buffering.
The piston 2 is fixedly provided with a sealing plug 4 at one side of the buffer sleeve 3 far away from the buffer column 17, and the sealing plug is used for sealing one end of the piston 2 far away from the buffer column 17. One end of the buffer sleeve 3 is abutted against the sealing plug 4. A sealing ring 8 is arranged between the sealing plug 4 and the piston 2, and the sealing ring 8 is an O-shaped ring. The arrangement of the sealing plug 4 enables the oil cylinder to be provided with a piston rod 5 with a hollow structure. The outer wall of the periphery of the piston 2 is embedded with a support ring 11, and sealing is not needed.
In the lifting stage of the oil cylinder, pressure oil enters from the oil inlet and outlet 14, passes through the oil inlet and outlet duct 13, and enters the second cavity 16, namely the bottom of the piston 2, and hydraulic oil in the first cavity 15 enters the second cavity 16 through the communicating oil duct 12; the pressure oil pushes the piston 2 and the piston rod 5 to extend.
In the retraction stage of the oil cylinder, under the action of an external load, the hydraulic oil in the second cavity 16 partially enters the first cavity 15 through the communication oil passage 12, and most of the hydraulic oil returns to the hydraulic oil tank through the oil inlet and outlet passage 13.
At the end of the retraction stroke, when the buffering sleeve 3 is sleeved on the buffering column 17, the sealing plug 4 and the buffering sleeve 3 are not sleeved on the buffering column 17 and a buffering cavity 9 is formed between the buffering column 17, the buffering sleeve 3 is sleeved on the inner wall of the periphery of the buffering column 17 and the outer wall of the periphery of the buffering column 17 to form a damping gap 10, hydraulic oil in the buffering cavity 9 flows back to the second cavity 16 from the damping gap 10, the buffering effect is achieved, the impact force on the descending stroke end of the oil cylinder is reduced, and the service life of the oil cylinder is prolonged.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a fork truck plays to rise hydro-cylinder decline buffer control system, includes cylinder body and piston assembly, its characterized in that: the cylinder body comprises a cylinder bottom and a cylinder barrel, and the cylinder bottom is connected to one end of the cylinder barrel; the piston assembly comprises a piston and a piston rod, the piston is movably arranged in the cylinder barrel, one end of the piston rod is connected with the piston, and the other end of the piston rod penetrates out of the cylinder barrel; a first cavity is formed between the outer wall of the piston rod and the inner wall of the cylinder barrel, and a second cavity is formed between the piston and the cylinder bottom; the first cavity is communicated with the second cavity;
the piston is characterized in that a buffer column is arranged on one side, facing the piston, of the cylinder bottom, a buffer sleeve is arranged on the inner wall of the piston, when the buffer column is sleeved with the buffer sleeve, a damping gap is formed between the buffer sleeve and the buffer column, a buffer cavity is formed between the piston and the buffer column, and the buffer cavity is communicated with the damping gap.
2. The system of claim 1, wherein the control system comprises: a communicating oil way for communicating the first cavity with the second cavity is formed in the piston; the cylinder bottom is provided with an oil inlet and an oil outlet, and an oil inlet and outlet duct which is communicated with the oil inlet and the oil outlet and the second cavity.
3. The system of claim 2, wherein the control system comprises: at least two oil inlet and outlet channels are arranged at intervals along the circumferential direction of the cylinder body.
4. The system of claim 3, wherein the control system comprises: the oil inlet and outlet channel is inclined towards the second cavity from the middle part of the cylinder bottom and is communicated with the oil inlet and outlet and the second cavity.
5. The system of claim 2, wherein the control system comprises: the communicating oil way is L-shaped, one end of the communicating oil way is communicated with the first cavity, and the other end of the communicating oil way is communicated with the second cavity.
6. The system of claim 1, wherein the control system comprises: and a sealing plug is arranged on one side of the piston, which is far away from the buffer column, of the buffer sleeve.
7. The system for controlling the descending buffer of the lifting cylinder of the forklift truck as claimed in claim 6, wherein: and a sealing ring is arranged between the sealing plug and the piston.
8. The system of claim 1, wherein the control system comprises: the one end that the cylinder was kept away from the cylinder bottom is connected with the cylinder cap, the cylinder cap is worn out to the one end that the piston was kept away from to the piston rod.
9. The system of claim 1, wherein the control system comprises: and a support ring is embedded in the outer wall of the periphery of the piston.
10. The system for controlling the descending buffer of the lifting cylinder of the forklift as claimed in claim 1, wherein: the buffer column is integrally connected with the cylinder bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222140306.XU CN218478505U (en) | 2022-08-15 | 2022-08-15 | Fork truck plays to rise hydro-cylinder decline buffer control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222140306.XU CN218478505U (en) | 2022-08-15 | 2022-08-15 | Fork truck plays to rise hydro-cylinder decline buffer control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218478505U true CN218478505U (en) | 2023-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222140306.XU Active CN218478505U (en) | 2022-08-15 | 2022-08-15 | Fork truck plays to rise hydro-cylinder decline buffer control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218478505U (en) |
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2022
- 2022-08-15 CN CN202222140306.XU patent/CN218478505U/en active Active
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