CN215719922U - Cylinder pulling prevention structure of hydraulic rock drill - Google Patents
Cylinder pulling prevention structure of hydraulic rock drill Download PDFInfo
- Publication number
- CN215719922U CN215719922U CN202121934443.XU CN202121934443U CN215719922U CN 215719922 U CN215719922 U CN 215719922U CN 202121934443 U CN202121934443 U CN 202121934443U CN 215719922 U CN215719922 U CN 215719922U
- Authority
- CN
- China
- Prior art keywords
- cylinder
- sleeve
- lag
- rock drill
- hydraulic rock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to the technical field of hydraulic rock drills, in particular to an anti-cylinder-pulling structure of a hydraulic rock drill, which comprises a cylinder sleeve, a piston rod and an anti-cylinder-pulling assembly, wherein the cylinder sleeve is provided with an opening, the piston rod is positioned inside the cylinder sleeve, the piston rod is arranged in the opening in a penetrating mode, the anti-cylinder-pulling assembly comprises a protective sleeve and a movable sleeve, the protective sleeve is fixedly connected with the cylinder sleeve, the protective sleeve is positioned at the opening, a movable cavity is arranged on the inner side face of the protective sleeve, the movable sleeve is connected with the protective sleeve in a sliding mode, the movable sleeve is positioned inside the protective sleeve, the movable sleeve is arranged inside the movable sleeve in a penetrating mode, and the cylinder-pulling phenomenon is avoided through the arrangement of the structure.
Description
Technical Field
The utility model relates to the technical field of hydraulic rock drills, in particular to a cylinder pulling prevention structure of a hydraulic rock drill.
Background
The hydraulic rock drill mainly comprises two parts of impact and rotation, wherein a front cavity of an impact mechanism normally presses oil, and the reciprocating impact motion of a piston in a cylinder sleeve is realized by controlling the oil inlet and the oil return of a rear cavity through the reversing of a pair of cylindrical slide valves: the rotary mechanism realizes the rotary motion of the drill bit shank by a large-torque low-rotating-speed cycloid hydraulic motor.
The errors of the processing precision and the assembly precision of parts cannot be avoided, the impact axis between the piston and the drill bit shank always has deflection, the outer surface of the piston is easily in direct contact with the inner surface of the cylinder sleeve, the surface tissues of the piston and the cylinder sleeve are damaged under the action of hydraulic pressure, and an occlusion material is formed, so that the piston cannot normally work in the cylinder sleeve, and the hydraulic rock drill has a cylinder pulling phenomenon.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a cylinder pulling prevention structure of a hydraulic rock drill, so as to prevent the hydraulic rock drill from generating a cylinder pulling phenomenon.
In order to achieve the purpose, the utility model provides an anti-cylinder-pulling structure of a hydraulic rock drill, which comprises a cylinder sleeve, a piston rod and an anti-cylinder-pulling assembly, wherein the cylinder sleeve is provided with an opening, the piston rod is positioned inside the cylinder sleeve, and the piston rod is arranged in the opening in a penetrating manner;
prevent cylinder pulling subassembly includes lag and movable sleeve, the lag with cylinder liner fixed connection, the lag is located the opening part, be provided with movable chamber on the medial surface of lag, the movable sleeve with lag sliding connection, the movable sleeve is located the inside of lag, the movable sleeve is worn to be established the inside of movable sleeve prevents the cylinder liner with the piston rod carries out direct contact to prevent that hydraulic rock drill from appearing drawing the jar phenomenon.
The outer side face of the movable sleeve is provided with a sliding support, the inner side face of the movable cavity is provided with a sliding groove, and the sliding support is located inside the sliding groove so as to realize sliding connection between the movable sleeve and the protective sleeve.
The anti-cylinder-pulling assembly further comprises two springs, the two springs are located in the movable cavity, the two springs are located at two ends of the movable sleeve respectively, and two ends of each spring are fixedly connected with the movable sleeve and the protecting sleeve respectively so as to facilitate resetting of the movable sleeve.
The protective sleeve comprises a protective portion and a fixing portion, the protective portion and the fixing portion are integrally formed, the fixing portion is located at one end of the protective portion, the protective portion is right, the cylinder sleeve is protected, and the fixing portion is used for fixing the cylinder sleeve.
The positioning part and the protection part are integrally formed, the cylinder sleeve is provided with a positioning groove matched with the positioning part, and the positioning part is located inside the positioning groove so as to facilitate installation of the protection sleeve.
The fixing part is provided with a plurality of counter bores at intervals, and the protecting sleeve is fixedly connected with the cylinder sleeve through a plurality of bolts so as to be fixed.
The hydraulic rock drill cylinder-pulling-preventing structure further comprises a sealing assembly, the protecting sleeve is provided with a containing cavity, the sealing assembly comprises two first pressure springs and two half sealing rings, two ends of each first pressure spring are respectively abutted to the protecting sleeve and the half sealing rings, the half sealing rings are slidably connected with the protecting sleeve and the half sealing rings, and the half sealing rings are abutted to improve the sealing effect between the piston rod and the protecting sleeve.
The hydraulic rock drill cylinder pulling prevention structure further comprises a sealing ring, the sealing ring is fixedly connected with the protection sleeve, the sealing ring is sleeved outside the piston rod, and the sealing effect between the piston rod and the protection sleeve is further improved.
According to the anti-cylinder-pulling structure of the hydraulic rock drill, when the piston rod performs reciprocating impact motion in the cylinder sleeve, the movable sleeve can move a small section of displacement along with the movement of the piston rod, the elastic part stretches or extrudes to generate restoring force when the movable sleeve moves, so that partial impact force is counteracted, the influence of the impact force caused by the movement of the piston rod on the protecting sleeve is reduced, the service life of the protecting sleeve is prolonged, the piston rod is not in direct contact with the cylinder sleeve, and the cylinder-pulling phenomenon is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 according to the drawings without creative efforts.
Fig. 1 is a sectional view of an anti-cylinder-pulling structure of a hydraulic rock drill provided by the utility model.
Fig. 2 is a cross-sectional view taken at a-a of fig. 1 in accordance with the present invention.
Fig. 3 is a cross-sectional view at B-B of fig. 1 in accordance with the present invention.
Fig. 4 is a partial enlarged view at C of fig. 1 provided by the present invention.
Fig. 5 is a schematic structural diagram of a protective sleeve of an anti-cylinder-pulling structure of a hydraulic rock drill provided by the utility model.
1-cylinder sleeve, 11-opening, 12-positioning groove, 2-piston rod, 3-cylinder pulling prevention assembly, 31-protecting sleeve, 311-movable cavity, 312-sliding groove, 313-protecting part, 314-fixing part, 3141-counter bore, 315-positioning part, 316-containing cavity, 32-movable sleeve, 321-sliding support, 33-spring, 4-sealing assembly, 41-first pressure spring, 42-semi-sealing ring and 5-sealing ring.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 5, the utility model provides an anti-cylinder-pulling structure of a hydraulic rock drill, which includes a cylinder sleeve 1, a piston rod 2 and an anti-cylinder-pulling assembly 3, wherein the cylinder sleeve 1 has an opening 11, the piston rod 2 is located inside the cylinder sleeve 1, and the piston rod 2 is inserted into the opening 11;
prevent cylinder subassembly 3 and include lag 31 and activity cover 32, lag 31 with 1 fixed connection of cylinder liner, lag 31 is located opening 11 department, be provided with movable chamber 311 on the medial surface of lag 31, activity cover 32 with lag 31 sliding connection, activity cover 32 is located lag 31's inside, activity cover 32 wears to establish activity cover 32's inside.
In the present embodiment, the piston rod 2 is inserted into the opening 11 of the cylinder liner 1, the protecting sleeve 31 is fixedly connected with the cylinder sleeve 1, the inner side surface of the protecting sleeve 31 is provided with the movable sleeve 32 in a sliding manner, the movable sleeve 32 is sleeved outside the piston rod 2, an elastic element is arranged on the side surface of the movable sleeve 32, when the piston rod 2 performs reciprocating impact motion in the cylinder sleeve 1, the movable sleeve 32 can move a small displacement along with the movement of the piston rod 2, the elastic part stretches or extrudes to generate restoring force when the movable sleeve 32 moves, thereby offsetting partial impact force, reducing the impact force on the protective sleeve 31 caused by the movement of the piston rod 2, prolonging the service life of the protective sleeve 31, and the piston rod 2 is not in direct contact with the cylinder sleeve 1, so that the phenomenon of cylinder pulling is avoided.
Further, a sliding support 321 is arranged on the outer side surface of the movable sleeve 32, a sliding groove 312 is arranged on the inner side surface of the movable cavity 311, and the sliding support 321 is located inside the sliding groove 312;
the anti-pulling cylinder assembly 3 further comprises two springs 33, the two springs 33 are both located in the movable cavity 311, the two springs 33 are respectively located at two ends of the movable sleeve 32, and two ends of the springs 33 are respectively fixedly connected with the movable sleeve 32 and the protecting sleeve 31;
the protective sleeve 31 comprises a protective part 313 and a fixing part 314, wherein the protective part 313 and the fixing part 314 are integrally formed, and the fixing part 314 is positioned at one end of the protective part 313;
the protecting jacket 31 further comprises a positioning portion 315, the positioning portion 315 and the protecting portion 313 are integrally formed, the cylinder sleeve 1 is provided with a positioning groove 12 matched with the positioning portion 315, and the positioning portion 315 is located inside the positioning groove 12;
the fixing portion 314 is provided with a plurality of counter bores 3141 at intervals, and the protecting sleeve 31 is fixedly connected with the cylinder sleeve 1 through a plurality of bolts.
In this embodiment, the protecting jacket 31 is provided with the protecting portion 313 and the fixing portion 314, the fixing portion 314 is provided with the counter bore 3141 so as to insert a plurality of bolts into the counter bore 3141 to fix the protecting jacket 31 on the cylinder liner 1, the movable chamber 311 is located on the inner side surface of the protecting portion 313, the sliding bracket 321 can slide inside the sliding groove 312 to limit the position of the movable sleeve 32 and prevent the movable sleeve 32 from rotating relative to the piston rod 2, the springs 33 are provided on both sides of the movable sleeve 32, when the movable sleeve 32 moves, the springs 33 on both sides of the movable sleeve 32 are stretched or pressed to generate restoring force to counteract the impact force caused by the piston rod 2, the positioning portion 315 can perform positioning, when the protecting jacket 31 is installed, the positioning portion 315 is inserted in alignment with the positioning groove 12 to position the protecting sleeve 31, so as to facilitate the installation of the protecting sleeve 31.
Further, the hydraulic rock drill cylinder pulling prevention structure further comprises a sealing assembly 4, the protecting sleeve 31 is provided with an accommodating cavity 316, the sealing assembly 4 comprises two first pressure springs 41 and two half sealing rings 42, two ends of each first pressure spring 41 are respectively abutted against the protecting sleeve 31 and the half sealing rings 42, the half sealing rings 42 are slidably connected with the protecting sleeve 31, and the two half sealing rings 42 are abutted against each other;
the hydraulic rock drill cylinder pulling prevention structure further comprises a sealing ring 5, the sealing ring 5 is fixedly connected with the protecting sleeve 31, and the sealing ring 5 is sleeved outside the piston rod 2.
In this embodiment, the accommodating cavity 316 is located on the inner side surface of the protection portion 313, the sealing assembly 4 can seal the joint between the protection portion 313 and the piston rod 2, two of the half sealing rings 42 are respectively abutted against the first pressure spring 41 and closely attached to the piston rod 2, and two of the half sealing rings 42 are attached to each other, so that the piston rod 2 is sealed, the sealing ring 5 is further arranged on the inner side surface of the protection portion 313, and the inner side surface of the sealing ring 5 is attached to the piston rod 2, so that the sealing effect of the piston rod 2 is further enhanced.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (8)
1. An anti-cylinder-pulling structure of a hydraulic rock drill is characterized in that,
the hydraulic rock drill anti-cylinder-pulling structure comprises a cylinder sleeve, a piston rod and an anti-cylinder-pulling assembly, wherein the cylinder sleeve is provided with an opening, the piston rod is positioned inside the cylinder sleeve, and the piston rod penetrates through the opening;
prevent drawing cylinder subassembly includes lag and movable sleeve, the lag with cylinder liner fixed connection, the lag is located the opening part, be provided with movable chamber on the medial surface of lag, the movable sleeve with lag sliding connection, the movable sleeve is located the inside of lag, the movable sleeve is worn to establish the inside of lag.
2. Hydraulic rock drill anti-scuffing cylinder structure as set forth in claim 1,
the outer side surface of the movable sleeve is provided with a sliding support, the inner side surface of the movable cavity is provided with a sliding groove, and the sliding support is located inside the sliding groove.
3. Hydraulic rock drill anti-scuffing cylinder structure as set forth in claim 2,
the cylinder pulling prevention assembly further comprises two springs, the two springs are located in the movable cavity and located at two ends of the movable sleeve respectively, and two ends of each spring are fixedly connected with the movable sleeve and the protection sleeve respectively.
4. A hydraulic rock drill anti-scuffing cylinder structure as set forth in claim 3,
the lag includes guard portion and fixed part, the guard portion with fixed part integrated into one piece, the fixed part is located the one end of guard portion.
5. Hydraulic rock drill anti-scuffing cylinder structure as set forth in claim 4,
the protecting sleeve further comprises a positioning portion, the positioning portion and the protecting portion are integrally formed, the cylinder sleeve is provided with a positioning groove matched with the positioning portion, and the positioning portion is located inside the positioning groove.
6. Hydraulic rock drill anti-scuffing cylinder structure as set forth in claim 5,
the fixed part interval is provided with a plurality of counter bores, the lag through a plurality of bolts with cylinder liner fixed connection.
7. Hydraulic rock drill anti-scuffing cylinder structure as set forth in claim 6,
the hydraulic rock drill prevents that cylinder structure still includes seal assembly, the lag has and holds the chamber, seal assembly includes two first pressure springs and two semi-seal rings, the both ends of first pressure spring respectively with the lag with semi-seal ring offsets and holds, semi-seal ring with lag sliding connection, two semi-seal ring offsets and holds.
8. A hydraulic rock drill anti-scuffing cylinder structure as set forth in claim 7,
the hydraulic rock drill cylinder pulling prevention structure further comprises a sealing ring, the sealing ring is fixedly connected with the protection sleeve, and the sealing ring is sleeved outside the piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121934443.XU CN215719922U (en) | 2021-08-18 | 2021-08-18 | Cylinder pulling prevention structure of hydraulic rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121934443.XU CN215719922U (en) | 2021-08-18 | 2021-08-18 | Cylinder pulling prevention structure of hydraulic rock drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215719922U true CN215719922U (en) | 2022-02-01 |
Family
ID=79997711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121934443.XU Active CN215719922U (en) | 2021-08-18 | 2021-08-18 | Cylinder pulling prevention structure of hydraulic rock drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215719922U (en) |
-
2021
- 2021-08-18 CN CN202121934443.XU patent/CN215719922U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9822802B2 (en) | Accumulator membrane for a hydraulic hammer | |
| US9592598B2 (en) | Hydraulic hammer having impact system subassembly | |
| FI121139B (en) | Hydraulic hammer and tool sleeve | |
| KR102115872B1 (en) | Sealing device for hydraulic striking apparatus and hydraulic striking apparatus including such a sealing device | |
| CN215719922U (en) | Cylinder pulling prevention structure of hydraulic rock drill | |
| KR100429089B1 (en) | Hydraulic ramming apparatus | |
| CA2282902C (en) | Venting and sealing system for down-hole drills | |
| CN211009895U (en) | Hydraulic oil cylinder | |
| EP1329632A3 (en) | Improved variable-displacement axial piston pump | |
| ATE22160T1 (en) | ROTARY PISTONS MACHINE. | |
| WO2003038320A1 (en) | Method and device at a hydrodynamic pump piston | |
| CN217056432U (en) | Pneumatic diaphragm valve | |
| US20050046114A1 (en) | Rotary seal member, assembly and methods for a hydraulic rotary swivel | |
| CN218093573U (en) | Shaft seal structure of coal gas pressurized fan | |
| KR102040485B1 (en) | Structure for protecting piston deformation of floor hinge | |
| CN113479797B (en) | Circular telescopic arm structure of high accuracy location for engineering machine tool | |
| JP3780040B2 (en) | Fluid pressure cylinder | |
| CN218894960U (en) | Mechanical seal with embedded double-end-face rotating ring structure | |
| CN218062915U (en) | Hydro-cylinder that can spacing prevent that skew from rocking for hydraulic hoist | |
| SU1656148A1 (en) | Hydraulic machine face distributor | |
| US11866999B2 (en) | Cutting roller | |
| CN113622819B (en) | Drilling pressure transmission sealing device for drilling tool | |
| CN217976840U (en) | Hydraulic cylinder protection device and hydraulic cylinder thereof | |
| CN212201951U (en) | Back-up tong is driven on top | |
| KR20170116024A (en) | Fluid pressure cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |