CN209781343U - Connecting structure of piston and piston rod and hydraulic cylinder convenient to disassemble and assemble - Google Patents
Connecting structure of piston and piston rod and hydraulic cylinder convenient to disassemble and assemble Download PDFInfo
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- CN209781343U CN209781343U CN201920434607.9U CN201920434607U CN209781343U CN 209781343 U CN209781343 U CN 209781343U CN 201920434607 U CN201920434607 U CN 201920434607U CN 209781343 U CN209781343 U CN 209781343U
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Abstract
A connecting structure of a piston and a piston rod and a hydraulic cylinder convenient to disassemble and assemble comprise a piston rod and a second piston which are sleeved in a cylinder body, wherein a second piston assembly is sleeved at the joint of the second piston and the piston rod, and a circle of steel balls are circumferentially arranged between the second piston assembly and the second piston to tightly press and fix the second piston assembly and the cylinder body. Arc-shaped grooves are correspondingly formed in the outer wall of the second piston assembly and the inner wall of the cylinder body respectively and used for mounting steel balls, steel ball holes used for mounting and dismounting the steel balls are formed in the cylinder body, and screw plugs are mounted in the steel ball holes. The second piston assembly and the cylinder body can be tightly pressed by the steel balls which are filled in, the piston assembly is connected with the cylinder body, and the piston can be disassembled by taking out the steel balls when being maintained and cleaned, so that the piston is not required to be disassembled and assembled layer by layer, and the disassembly and the assembly are convenient. The connecting structure is simple, the processing is convenient, the slotting depth is small, and the rigidity and the strength are large.
Description
Technical Field
The utility model relates to a pneumatic cylinder manufacturing technical field, concretely relates to connection structure and the convenient pneumatic cylinder of dismouting of piston and piston rod.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion or swinging motion. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. The hydraulic cylinder is basically composed of a cylinder barrel and a cylinder cover, a piston and a piston rod, a sealing device, a buffering device and an exhaust device.
The connection between the piston and the piston rod of the hydraulic cylinder mostly adopts a threaded connection structure and a clamping key connection structure. The thread connection structure is simple and practical in form and is relatively universal in application, but the machining and assembly of threads are troublesome; the clamping key connecting mechanism is suitable for oil cylinders with high working pressure and high vibration of working machinery. The existing bearing hydraulic oil cylinder mostly adopts a clamping ring mode to connect the piston and the piston rod, a groove is arranged at the connecting position, and a clamping key is clamped into the groove to tightly press the piston and the piston rod clamp. The required groove has larger depth and taper, and the groove is inconvenient to process; in addition, the grooves with larger depth formed in the steel plate with small thickness inevitably cause weak wall rigidity and weak compression strength. In addition, this kind of mode dismouting is inconvenient, needs the successive layer to dismantle during the maintenance clearance just can take out the piston rod, and the dismouting process is loaded down with trivial details and difficult clearance.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a connection structure of piston and piston rod and the convenient pneumatic cylinder of dismouting, the simple processing of being convenient for of connected mode structure of used piston and piston rod to the dismouting is convenient.
In order to solve the technical problem, the utility model discloses a following scheme:
A connecting structure of a piston and a piston rod comprises the piston rod and a second piston which are sleeved in a cylinder body, wherein a second piston assembly is sleeved at the joint of the second piston and the piston rod, and a circle of steel balls are circumferentially arranged between the second piston assembly and the cylinder body to tightly press and fix the second piston assembly and the cylinder body.
Further, a groove for mounting the steel ball is arranged on the second piston assembly and/or the cylinder body.
Further, arc-shaped grooves are correspondingly formed in the outer wall of the second piston assembly and the inner wall of the cylinder body respectively and used for mounting steel balls.
Furthermore, a steel ball hole for loading and unloading a steel ball is formed in the cylinder body, and a blocking piece is installed in the steel ball hole.
furthermore, the inner wall of the steel ball hole is provided with internal threads, and a screw plug is arranged in the steel ball hole.
Further, piston assembly is including poppet disk seat, poppet valve, pressure regulating spring, poppet valve bilateral symmetry installs on poppet disk seat, installs pressure regulating spring between two poppet valves.
Further, a piston rod sealing element is arranged at the joint of the second piston assembly and the piston rod.
Furthermore, the first piston is connected with the piston rod through a shaft clamping key, and a sealing ring is installed at the connecting position.
The utility model discloses beneficial effect who has:
1. The piston and the piston rod are connected in a steel ball compression mode, and compared with an existing clamping ring connection mode, only one circle of small groove used for placing a steel ball needs to be formed in a cylinder body or a piston assembly, so that the steel ball clamping device is convenient to process, small in groove depth and high in rigidity and strength.
2. The steel ball hole is formed in the cylinder body, the steel ball can be quickly installed without being sleeved layer by layer, the second piston assembly can be tightly pressed with the cylinder body by the steel ball, the second piston assembly is connected with the cylinder body, the second piston is connected with the piston rod, when the piston is maintained and cleaned, the piston can be detached by taking out the steel ball, and the disassembly and the assembly are convenient.
3. The piston is connected with the piston rod through the steel ball, and compared with the existing connecting piece with the edge angle, the spherical connecting piece can avoid scratching the contact surface of the piston assembly and the cylinder body; on the other hand, the steel ball connection is adopted, so that the friction force between the contact surfaces can be reduced.
4. The axial movement of the poppet valve is adopted to switch the flow passage, the valve core can be completely opened by a small movement amount, and the pressure regulating spring is matched, so that the flow direction of the hydraulic oil can be conveniently and quickly switched.
drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a connecting portion of the second piston and the piston rod;
Reference numerals: 1-cylinder body, 2-first piston, 3-sealing ring, 4-shaft clamping key, 5-piston rod, 6-second piston, 7-second piston component, 70-poppet valve seat, 71-poppet valve, 72-pressure regulating spring, 8-piston rod seal, 9-steel ball and 10-screw plug.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
Example 1:
As shown in fig. 1 and fig. 2, the present embodiment provides a connection structure of a piston and a piston rod, including a second piston 6 and a piston rod 5 sleeved in a cylinder 1, where the piston rod 5 is sleeved in the second piston 6, a second piston assembly 7 is sleeved at a connection position of the second piston 6 and the piston rod 5, and a circle of steel balls 9 is circumferentially installed between the second piston assembly 7 and the cylinder 1 to compress and fix the second piston assembly 7 and the cylinder 1.
compare current snap ring connected mode, the connection structure of second piston 6 and piston rod 5 that this embodiment provided, it is simple convenient to intensity is great. A circle of steel balls 9 are circumferentially arranged between the second piston assembly 7 and the cylinder body 1, and the diameter of each steel ball 9 is set, so that the steel balls 9 firmly press the second piston assembly 7 and the cylinder body 1, and the second piston 6 can be connected with the piston rod 5. Specifically, a circle of mounting ring is sleeved between the second piston assembly 7 and the cylinder 1 for mounting the steel ball 9, and the mounting ring can be integrated with the second piston assembly 7 or the cylinder 1 or can be mounted separately. The steel balls 9 are circumferentially arranged in the mounting ring, and then the cylinder body 1 is sleeved outside the mounting ring or the second piston assembly 7 is sleeved inside the mounting ring. The diameter of the steel ball 9 is set according to the sizes of the second piston assembly 7 and the cylinder body 1, so that the steel ball 9 can be compressed, the second piston assembly 7 is connected with the cylinder body 1, and the second piston 6 can be connected with the piston rod 5.
Further, a groove for mounting the steel ball 9 is arranged on the second piston assembly 7 and/or the cylinder 1. The groove can be arc-shaped or square-shaped, so long as the steel ball 9 can be limited, after the steel ball 9 is installed, the second piston assembly 7 or the cylinder body 1 is sleeved, the steel ball 9 is compressed, and the second piston assembly 7 and the cylinder body 1 can be compressed.
Further, arc-shaped grooves are correspondingly formed in the outer wall of the second piston assembly 7 and the inner wall of the cylinder body 1 respectively and used for mounting the steel ball 9. The groove is semicircular or smaller than semicircular, and the second piston assembly 7 is matched with the cylinder body 1 to form an arc-shaped groove for mounting the steel ball 9, so that the shape of the arc-shaped groove can be better matched with that of the steel ball.
preferably, the cylinder is provided with a steel ball hole for easy disassembly, and the steel ball 9 and the piston rod 5 can be removed without disassembling the cylinder layer by layer.
Furthermore, a steel ball hole for loading and unloading a steel ball is formed in the cylinder body 1, and a blocking piece is installed in the steel ball hole.
Furthermore, the inner wall of the steel ball hole is provided with internal threads for installing the screw plug 10.
The cylinder body 1 is provided with a steel ball hole, after the cylinder body 1, the second piston assembly 7 and the piston rod 5 are installed, a steel ball 9 is installed from the steel ball hole, then a screw plug 10 is installed for sealing, the steel ball 9 is circumferentially and tightly arranged in a groove between the second piston assembly 7 and the cylinder body 1, the second piston assembly 7 and the cylinder body 1 are pressed tightly, and the second piston 6 is connected with the piston rod 5. When the disassembly is needed, the steel ball 9 is poured out from the steel ball hole, and the piston rod 5 is not pressed any more at the moment, so that the disassembly can be easily carried out.
Further, the piston assembly 7 comprises a poppet valve seat 70, poppet valves 71 and pressure regulating springs 72, the poppet valves 71 are symmetrically installed on the poppet valve seat 70, and the pressure regulating springs 72 are installed between the two poppet valves 71. The poppet valve 71 is axially moved to switch the flow path, the valve core can be completely opened by a small movement amount, and the pressure regulating spring 72 is provided to facilitate quick switching of the flow direction of the hydraulic oil.
Further, a piston rod sealing member 8 is installed at the joint of the second piston assembly 7 and the piston rod 5.
Example 2:
As shown in fig. 1, the present embodiment provides a hydraulic cylinder that is easy to assemble and disassemble, and the connection structure of the piston and the piston rod described in embodiment 1 above is adopted.
The utility model provides a convenient pneumatic cylinder of dismouting, includes cylinder body 1, first piston 2 and second piston 6 of suit in cylinder body 1, and piston rod 5 cup joints in first piston 2 and second piston 6, second piston 6 and piston rod 5 pass through embodiment 1 the connection structure installation of piston and piston rod. The hydraulic cylinder is a single-stage or multi-stage hydraulic cylinder, and the connection structure of the piston and the piston rod described in embodiment 1 can be adopted as long as the connection of the piston and the piston rod is involved.
Furthermore, the first piston 2 is connected with a piston rod 5 through a shaft clamping key 4, and a sealing ring 3 is installed at the connecting position. And a sealing component is arranged at the connecting part to increase the air tightness between the piston and the piston rod and enhance the performances of the hydraulic cylinder, such as sensitivity, stability and the like.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and the technical essence of the present invention is that within the spirit and principle of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments are all within the protection scope of the technical solution of the present invention.
Claims (9)
1. The connecting structure of the piston and the piston rod comprises a piston rod (5) and a second piston (6) which are sleeved in a cylinder body (1), and is characterized in that a second piston component (7) is sleeved at the joint of the second piston (6) and the piston rod (5), and a circle of steel balls (9) are circumferentially arranged between the second piston component (7) and the cylinder body (1) to compress and fix the second piston component (7) and the cylinder body (1).
2. A piston and piston rod connection according to claim 1, characterised in that a groove for mounting a steel ball (9) is provided on the second piston assembly (7) and/or cylinder (1).
3. The connecting structure of the piston and the piston rod as claimed in claim 2, wherein the outer wall of the second piston assembly (7) and the inner wall of the cylinder body (1) are respectively and correspondingly provided with an arc-shaped groove for mounting the steel ball (9).
4. A connecting structure of a piston and a piston rod as claimed in claim 3, wherein the cylinder body (1) is provided with a steel ball hole for loading and unloading a steel ball, and a blocking member is arranged in the steel ball hole.
5. a connection structure of a piston and a piston rod according to claim 4, characterized in that the inner wall of the steel ball hole is provided with an internal thread, and a screw plug (10) is arranged in the steel ball hole.
6. A piston and piston rod connecting structure according to claim 1, wherein the piston assembly (7) comprises a poppet valve seat (70), poppet valves (71) and pressure regulating springs (72), the poppet valves (71) are symmetrically mounted on the poppet valve seat (70) in the left-right direction, and the pressure regulating springs (72) are mounted between the two poppet valves (71).
7. A piston and piston rod connection according to claim 1, characterised in that a piston rod seal (8) is mounted at the connection of the second piston assembly (7) and the piston rod (5).
8. the hydraulic cylinder convenient to disassemble and assemble comprises a cylinder body (1), a first piston (2) and a second piston (6) which are sleeved in the cylinder body (1), and a piston rod (5) is sleeved in the first piston (2) and the second piston (6), and is characterized in that the second piston (6) and the piston rod (5) are installed through a connecting structure of the piston and the piston rod according to any one of claims 1 to 7.
9. Hydraulic cylinder convenient to disassemble and assemble according to claim 8, wherein the first piston (2) is connected with the piston rod through a shaft clamping key (4), and a sealing ring (3) is installed at the connecting position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920434607.9U CN209781343U (en) | 2019-04-02 | 2019-04-02 | Connecting structure of piston and piston rod and hydraulic cylinder convenient to disassemble and assemble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920434607.9U CN209781343U (en) | 2019-04-02 | 2019-04-02 | Connecting structure of piston and piston rod and hydraulic cylinder convenient to disassemble and assemble |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209781343U true CN209781343U (en) | 2019-12-13 |
Family
ID=68800889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920434607.9U Active CN209781343U (en) | 2019-04-02 | 2019-04-02 | Connecting structure of piston and piston rod and hydraulic cylinder convenient to disassemble and assemble |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209781343U (en) |
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2019
- 2019-04-02 CN CN201920434607.9U patent/CN209781343U/en active Active
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