CN211259195U - Locking structure for oil cylinder of excavator - Google Patents
Locking structure for oil cylinder of excavator Download PDFInfo
- Publication number
- CN211259195U CN211259195U CN201922243714.6U CN201922243714U CN211259195U CN 211259195 U CN211259195 U CN 211259195U CN 201922243714 U CN201922243714 U CN 201922243714U CN 211259195 U CN211259195 U CN 211259195U
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- piston
- nut
- locking structure
- piston rod
- excavator
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Abstract
The utility model discloses an excavator hydro-cylinder locking structure, establish the piston on the piston rod including piston rod and cover, the rear end of piston rod has the connection area who is connected with the piston cooperation, connection area includes middle section and linkage segment, threaded connection has and is female on the linkage segment, and female last threaded connection has the nut, and female upwards has seted up a plurality of screw holes week, screw downthehole correspondence is twisted and is taken out the ejector screw and screw the nut again after the ejector screw makes the middle section tensile and make the upper end and the left end of nut hug closely with the inboard of piston, piston and nut bear the pretightning force. In this way, the utility model discloses excavator hydro-cylinder locking structure can be convenient for install, utilizes the tension of the extension of piston rod to reach the purpose of pretightning force, stable in structure, piston rod and piston firm in connection.
Description
Technical Field
The utility model relates to a hydro-cylinder field especially relates to an excavator hydro-cylinder locking structure.
Background
Because excavator cylinder system pressure is higher, and the functioning speed is very fast, and hydraulic cylinder piston can impact end cover and cylinder bottom constantly at the during operation, produces very big vibration to arouse the not hard up of piston and piston rod threaded connection department. Therefore, the piston in the oil cylinder design can be ensured to be normally used only by using a certain torque.
The oversized oil digging cylinder has a larger rod diameter (d is larger than or equal to 130mm), the specification of the thread for connecting the piston and the piston rod is correspondingly larger, and the service performance of the oil cylinder can be ensured only when the required torque reaches more than 10000 N.M. The current structure must use professional equipment to ensure the torque.
Disclosure of Invention
The utility model discloses the main technical problem who solves provides an excavator hydro-cylinder locking structure, can be convenient for install, utilizes the tension of the extension of piston rod to reach the purpose of pretightning force, stable in structure, piston rod and piston firm in connection.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides an excavator hydro-cylinder locking structure, establish the piston on the piston rod including piston rod and cover, the rear end of piston rod has the connection area who is connected with the piston cooperation, connection area includes middle section and linkage segment, threaded connection has and is female on the linkage segment, and female last threaded connection has the nut, and female upwards seted up a plurality of screw holes, the downthehole screw that corresponds of screw twists ejector screw makes the tensile back of middle section screw nut of screwing again make the upper end and the left end of nut hug closely with the inboard of piston, will push screw again take out, piston and nut bear the pretightning force.
In a preferred embodiment of the present invention, the connection region further includes an inclined surface, the inclined surface is located on the left side of the middle section, and the inclined surface is engaged with the inner wall of the piston.
In a preferred embodiment of the present invention, the female portion has a thread structure on both the inner side and the outer side.
In a preferred embodiment of the present invention, the screw holes are evenly spaced along the center of the nut, and the number of the screw holes is 16.
In a preferred embodiment of the present invention, a gap is formed between the left end of the nut and the piston.
In a preferred embodiment of the invention, there is a gap between the middle section and the inner side of the piston.
In a preferred embodiment of the present invention, the height of the nut is slightly larger than the height of the nut.
In a preferred embodiment of the present invention, the right end of the piston has an extension, and the extension is tightly attached to the outer side of the nut.
The utility model has the advantages that: the utility model discloses excavator hydro-cylinder locking structure can be convenient for install, utilizes the tension of the extension of piston rod to reach the purpose of pretightning force, and mechanism temperature, piston rod and piston connection are firm.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a schematic structural view of a preferred embodiment of the excavator cylinder locking structure of the present invention;
FIG. 2 is a schematic view of a portion of the structure of FIG. 1;
FIG. 3 is a schematic view of a portion of the structure of FIG. 1;
FIG. 4 is a schematic view of the installation process of the locking structure of the excavator cylinder;
FIG. 5 is a schematic view of the installation process of the locking structure of the excavator cylinder;
FIG. 6 is a schematic view of the installation process of the locking structure of the excavator cylinder;
FIG. 7 is a schematic view of the installation process of the locking structure of the excavator cylinder;
the parts in the drawings are numbered as follows: 1. piston rod, 2, piston, 3, connection region, 31, middle section, 32, connection section, 33, inclined plane, 4, nut, 41, screw hole, 5, nut, 6, ejector screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 to 3, an excavator cylinder locking structure includes a piston rod 1 and a piston 2 sleeved on the piston rod 1, the rear end of the piston rod 1 has a connection region 3 cooperatively connected with the piston 2, the connection region 3 includes a middle section 31 and a connection section 32, the connection section 32 is in threaded connection with a nut 4, the nut 4 is in threaded connection with a nut 5, a plurality of screw holes 41 are formed in the periphery of the nut 4, a jacking screw 6 is correspondingly screwed into the screw hole 41 to stretch the middle section 31, the jacking screw 6 is taken out, and then the nut 5 is screwed to tightly attach the upper end and the left end of the nut 5 to the inner side of the piston 2, and the piston 2 and the nut 6 bear pre-tightening force.
In addition, the connecting region 3 further includes an inclined surface 33, the inclined surface 33 is located at the left side of the middle section 32, the inclined surface 33 is matched with the inner wall of the piston 2, and the inclined surface 33 can increase the positioning area of the piston and the piston.
In addition, the nut 4 has a screw structure on both the inside and the outside.
The screw holes 41 are evenly spaced along the center of the nut 4, and the number of the screw holes 41 is 16.
In addition, a gap is formed between the left end of the nut 4 and the piston 2.
In addition, a gap is formed between the middle section 31 and the inner side of the piston 2, the middle section 31 is a slender part, and the elongation of the piston rod after being subjected to pretightening force is increased on the premise of ensuring the strength of the piston rod.
In addition, the height of the nut 5 is slightly greater than the height of the nut.
In addition, the right end of the piston 2 has an extension, and the extension 21 is tightly attached to the outer side of the nut 5.
The utility model discloses specific theory of operation as follows: firstly, as shown in fig. 4, the piston rod 1, the piston 2, the nut 5 and the nut 4 are screwed in place without any gap; secondly, as shown in fig. 5, the pushing screws 6 are assembled and torque is uniformly applied, so that the middle section 31 of the piston rod 1 is stretched in a tensile manner, the middle section 31 is stretched after being subjected to tensile force along with the increase of the torque of one circle of pushing screws, and a certain gap is formed between the nut 5 and the piston 2 along with the stretching of the piston rod 1. Thirdly, as shown in fig. 6, the nut 2 is tightened again to fit the piston 1 without a gap, while the piston rod 1 is still in a stretched state. Fourth, as shown in fig. 7, the ejector screws 6 are gradually unscrewed, and the middle section 31 of the piston rod 1 is shortened because there is no ejector screw 6, but the piston rod 1 cannot be shortened because the nut 5 has been tightened to abut the end face of the piston 2. All the pulling forces are taken up by the nut 5 and the piston 6. This corresponds to a pretension on the nut 5.
Be different from prior art, the utility model discloses excavator hydro-cylinder locking structure can be convenient for install, utilizes the tension of the extension of piston rod to reach the purpose of pretightning force, stable in structure, piston rod and piston firm in connection.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.
Claims (8)
1. The utility model provides an excavator hydro-cylinder locking structure, includes piston rod and cover and establishes the piston on the piston rod, its characterized in that, the rear end of piston rod has the connection area who is connected with the piston cooperation, connection area includes middle section and linkage segment, threaded connection has female on the linkage segment, and female last threaded connection has the nut, and female circumference has seted up a plurality of screw holes, the downthehole correspondence of screw twists the ejector screw and makes the tensile back nut of screwing of middle section make the upper end and the left end of nut hug closely with the inboard of piston, will push away the screw again and take out, piston and nut bear the pretightning force.
2. The excavator cylinder locking structure of claim 1, wherein the connection region further comprises an inclined surface located on the left side of the middle section, the inclined surface being engaged with an inner wall of the piston.
3. The excavator cylinder locking structure of claim 2 wherein the nut has a threaded structure on both the inside and outside of the nut.
4. The excavator cylinder locking structure of claim 2, wherein the screw holes are evenly distributed along the center of the nut at intervals, and the number of the screw holes is 16.
5. The excavator cylinder locking structure of claim 2, wherein a gap is provided between the left end of the nut and the piston.
6. The excavator cylinder locking structure of claim 2 wherein there is a gap between the intermediate section and the inside of the piston.
7. The excavator cylinder locking structure of claim 1, wherein the height of the nut is slightly greater than the height of the nut.
8. The locking structure of the excavator cylinder as claimed in claim 1, wherein the right end of the piston is provided with an extension section, and the extension section is closely attached to the outer side of the nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922243714.6U CN211259195U (en) | 2019-12-16 | 2019-12-16 | Locking structure for oil cylinder of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922243714.6U CN211259195U (en) | 2019-12-16 | 2019-12-16 | Locking structure for oil cylinder of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211259195U true CN211259195U (en) | 2020-08-14 |
Family
ID=71961363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922243714.6U Active CN211259195U (en) | 2019-12-16 | 2019-12-16 | Locking structure for oil cylinder of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211259195U (en) |
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2019
- 2019-12-16 CN CN201922243714.6U patent/CN211259195U/en active Active
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