CN114427557A - Vibration absorber - Google Patents
Vibration absorber Download PDFInfo
- Publication number
- CN114427557A CN114427557A CN202210094231.8A CN202210094231A CN114427557A CN 114427557 A CN114427557 A CN 114427557A CN 202210094231 A CN202210094231 A CN 202210094231A CN 114427557 A CN114427557 A CN 114427557A
- Authority
- CN
- China
- Prior art keywords
- piston rod
- cylinder body
- buffer
- sleeve
- vibration absorber
- 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.)
- Granted
Links
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 40
- 238000004891 communication Methods 0.000 claims abstract description 57
- 230000003068 static effect Effects 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 20
- 230000004044 response Effects 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 4
- 230000035939 shock Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 44
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 230000003139 buffering effect Effects 0.000 description 8
- 238000005553 drilling Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000010724 circulating oil Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a vibration absorber which comprises a cylinder body and a piston rod arranged in the cylinder body in a sliding mode, wherein the outer edge of the middle of the piston rod is in sealing fit with the inner wall of the cylinder body so as to divide the inner cavity of the cylinder body into a first buffer cavity and a second buffer cavity, the first buffer cavity is communicated with a low-pressure oil return path, the second buffer cavity is communicated with a high-pressure oil path, a communication channel is arranged in the piston rod, one end of the communication channel is provided with a first communication port communicated with the first buffer cavity, the other end of the communication channel is provided with a second communication port communicated with the second buffer cavity, a buffer sleeve is arranged in the cylinder body in a static mode relative to the cylinder body, the piston rod can penetrate through the buffer sleeve in a sliding mode, and when the piston rod is not impacted, the front end of the buffer sleeve is flush with the rear end of the second communication port or is positioned in the middle of the second communication port. The shock absorber can effectively absorb the impact energy of a rock drill and the like, and the piston rod can rapidly move to a balance position due to the structural design of the communication port and the buffer cavity, so that high-frequency response to shock is realized.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a vibration absorber.
Background
When the hydraulic rock drill works, a piston of the hydraulic rock drill impacts a drill rod at the frequency of 70HZ, the impact power is high, and the single impact energy can reach several hundred coke. When the rock is broken by impact, most of impact energy is transmitted to the rock through the drill rod and is absorbed at the moment of rock breaking, and the impact reaction force on the drill rod can be greatly reduced. Therefore, when the load simulation device is adopted to replace a cement block or stone material to drill and debug the drill jumbo, how to quickly absorb and consume impact energy needs to be considered, meanwhile, the impact reaction force of the drill rod is reduced, and the load simulation device and the rock drill are protected from being damaged.
The existing buffer device for the rock drill is mostly suitable for buffering and protecting a machine shell, and even a small number of buffer devices for the external bearing of the performance test of the rock drill cannot realize high-frequency bearing and buffering.
In summary, how to effectively solve the problems that the vibration absorber is difficult to realize high-frequency impact bearing and buffering, etc., is a problem that needs to be solved by those skilled in the art at present.
Disclosure of Invention
In view of the above, the present invention provides a vibration absorber, which has a structural design that can effectively solve the problem that the conventional vibration absorber is difficult to realize high frequency shock-bearing and buffering.
In order to achieve the purpose, the invention provides the following technical scheme:
a vibration absorber comprises a cylinder body and a piston rod arranged in the cylinder body in a sliding way, wherein the front end of the piston rod extends out of the cylinder body, the outer edge of the middle part of the piston rod is in sealing fit with the inner wall of the cylinder body so as to divide the inner cavity of the cylinder body into a first buffer cavity and a second buffer cavity, the first buffer cavity is communicated with a low-pressure oil return oil way, the second buffer cavity is communicated with a high-pressure oil way, a communicating channel is arranged inside the piston rod, one end of the communicating channel is provided with a first communicating port communicated with the first buffer cavity, the other end of the communicating channel is provided with a second communicating port communicated with the second buffer cavity, a buffer sleeve is arranged in the cylinder body and is stationary relative to the cylinder body, the piston rod is slidably arranged in the buffer sleeve in a penetrating way, and when the piston rod is not impacted, the front end of the buffer sleeve is flush with the rear end of the second communicating port or is positioned in the middle of the second communicating port.
Further, in the vibration absorber, the first communication port and the second communication port are both provided along a radial direction of the piston rod.
Further, in the vibration absorber, the piston rod is provided with a plurality of the first communication ports and a plurality of the second communication ports, the plurality of the first communication ports are uniformly distributed along the circumferential direction of the piston rod, and the plurality of the second communication ports are uniformly distributed along the circumferential direction of the piston rod.
Furthermore, the vibration absorber further comprises a rear supporting sleeve which is relatively static and is arranged in the cylinder body, the piston rod slidably penetrates through the rear supporting sleeve and is sealed with the rear supporting sleeve, a mounting groove is formed in the rear supporting sleeve, the buffer sleeve is arranged in the mounting groove, and the inner wall of the cylinder body, the outer wall of the piston rod, the front end of the rear supporting sleeve and the front end of the buffer sleeve form a second buffer cavity in a surrounding mode.
Furthermore, in the vibration absorber, a rear support ring groove is formed in the inner wall of the rear support sleeve, a rear static pressure groove is formed between the rear support ring groove and the outer wall of the piston rod, and the rear static pressure groove is communicated with the high-pressure oil path.
Furthermore, the vibration absorber further comprises a front support sleeve which is relatively static and is arranged in the cylinder body, the piston rod slidably penetrates through the front support sleeve and is sealed with the front support sleeve, and the inner wall of the cylinder body, the outer wall of the piston rod and the rear end of the front support sleeve form a first buffer cavity.
Further, in the vibration absorber, the part of the piston rod located in the first buffer cavity is provided with a step portion protruding in the radial direction, a counter bore used for being matched with the step portion is formed in the rear end face of the front support sleeve, the inner diameter of the counter bore is larger than the outer diameter of the step portion, and when the piston rod is not impacted, the step portion is located behind the counter bore.
Furthermore, in the vibration absorber, a front support ring groove is formed in the inner wall of the front support sleeve, a front static pressure groove is formed between the front support ring groove and the outer wall of the piston rod, and the front static pressure groove is communicated with the high-pressure oil path.
Further, in the vibration absorber, the cylinder body includes a cylinder body with openings at both ends, and a front end cover and a rear end cover fixedly connected to both ends of the cylinder body, and the front end cover is provided with a through hole for the piston rod to pass through.
Further, the vibration absorber further comprises an oil distribution valve block fixed outside the cylinder body, and the oil distribution valve block is internally provided with a first oil distribution channel communicated with the first buffer cavity and a second oil distribution channel communicated with the second buffer cavity.
The invention provides a vibration absorber which comprises a cylinder body, a piston rod and a buffer sleeve. Wherein, the piston rod is installed in the cylinder body in a sliding manner, and the front end of the piston rod extends out of the cylinder body. The outer fringe at piston rod middle part and the inner wall of cylinder body are sealed to cooperate in order to divide the inside cavity of cylinder body into first cushion chamber and second cushion chamber, and the inside of piston rod has the intercommunication passageway, and the one end of intercommunication passageway has the first intercommunication mouth with first cushion chamber intercommunication, and the other end has the second intercommunication mouth with the second cushion chamber intercommunication, and first cushion chamber and low pressure oil return oil circuit intercommunication, second cushion chamber and high-pressure oil circuit intercommunication. The cushion collar is installed in the cylinder body, and is static relative to the cylinder body, and the piston rod slidable wears to locate in the cushion collar. When the piston rod is not impacted, the front end of the buffer sleeve is flush with the rear end of the second communicating port or is positioned in the middle of the second communicating port.
The vibration absorber provided by the invention is applied to a rock drilling machine as an example, and for the convenience of description, the direction from the first buffer cavity to the second buffer cavity is taken as backward, and the opposite direction is taken as forward. When the drill rod tightly abuts against the piston rod and rock drilling is not performed, the piston rod is pushed to move backwards by the tightening force, high-pressure oil in the second buffer cavity needs to be discharged into the first buffer cavity through the second communicating port in the piston rod to return oil, along with the backward movement of the piston rod, the area of an inlet of the second communicating port under the covering of the buffer sleeve is gradually reduced, the oil return resistance is gradually increased, the acting force of the second buffer cavity is gradually increased at the moment until the acting force is equal to the tightening force, and the piston rod reaches a balance position. In the process of drilling the drill rod, the instantaneous impact force of the rock drill acts on the piston rod, the piston rod instantly obtains the speed of backward movement and starts to move, at the moment, high-pressure oil in the second buffer cavity is discharged into the first buffer cavity through a second communication port on the piston rod to return oil, along with the backward movement of the piston rod, the area of an inlet of the second communication port under the covering of the buffer sleeve is gradually reduced, the oil return resistance is gradually increased, at the moment, the acting force of the second buffer cavity is gradually increased, and along with the fact that the acting force of the second buffer cavity is larger than the abutting force of the drill rod, the piston rod is gradually decelerated; when the piston rod gradually decelerates to zero, the piston rod starts to accelerate reversely, namely the piston rod moves forwards, the acting force of the second buffer cavity is gradually reduced along with the forward movement of the piston rod, when the piston rod moves forwards to a balance position, the reverse deceleration process is started, the piston rod reciprocates in the same way until the piston rod returns to the balance position again after the deceleration reaches zero, and finally the piston rod stops at the balance position, namely a buffer process is completed. To sum up, adopt this bump leveller, can effectively absorb the impact energy of rock drill etc. the structural design of intercommunication mouth and cushion chamber makes the piston rod can the rapid movement balanced position, has realized the high frequency response to the impact.
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.
Figure 1 is a schematic structural view of a cross section of a vibration absorber according to an embodiment of the present invention;
fig. 2 is a partial structural schematic diagram of fig. 1.
The drawings are numbered as follows:
the hydraulic drill rod comprises a cushion pad 1, a punched head 2, a piston rod 3, a front end cover 4, a front supporting sleeve 5, a front static pressure groove 6, a first buffer cavity 7, a cylinder body 8, an oil distribution valve block 9, a second buffer cavity 10, a second communication port 11, a buffer sleeve 12, a rear static pressure groove 13, a rear supporting sleeve 14, a rear end cover 15, a first communication port 16 and a drill rod 17.
Detailed Description
The embodiment of the invention discloses a vibration absorber which can rapidly absorb the impact energy of a rock drill.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-2, fig. 1 is a schematic structural diagram of a cross section of a vibration absorber according to an embodiment of the present invention; fig. 2 is a partial structural schematic diagram of fig. 1.
In one embodiment, the present invention provides a vibration absorber including a cylinder, a piston rod 3, and a cushion sleeve 12.
Wherein, the piston rod 3 is slidably mounted in the cylinder body, and the front end of the piston rod 3 extends out of the cylinder body. The piston rod 3 can slide back and forth in the cylinder, and the front end of the piston rod 3, namely the overhanging end, is used for receiving external force impact, such as the impact of a drill rod 17. The front end of the piston rod 3 can be fixedly connected with the driven punch 2, for example, the driven punch 2 is in threaded connection with the piston rod 3, the rear end of the driven punch 2 is in contact positioning with the front end of the piston rod 3, and the driven punch 2 can better bear impact. In order to better realize the buffering of the external force, a buffering cushion 1 is fixed at the front end of the punch 2. Specifically, a round blind hole is processed at the front end of the punch-receiving head 2, the periphery of the cushion pad 1 is in clearance fit with the inner surface of the round blind hole, and the rear end of the cushion pad 1 is in contact positioning with the punch-receiving head 2. After the impact force borne by the punch 2 passes through the cushion pad 1, the noise can be effectively reduced, meanwhile, the punch 2 is protected to a certain extent, and the whole service life of the vibration absorber is prolonged.
Specifically, the cylinder body includes cylinder body 8 of both ends open-ended and front end housing 4 and rear end cap 15 at both ends around cylinder body 8 fixed connection, has the through-hole that is used for piston rod 3 to wear out on front end housing 4. So set up, the equipment of each part of being convenient for. The rear end cover 15 is fixedly connected with the cylinder body 8 through screws, and the front end cover 4 is fixedly connected with the cylinder body 8 through screws.
The outer edge of the middle part of the piston rod 3 is in sealing fit with the inner wall of the cylinder body so as to divide the inner cavity of the cylinder body into a first buffer cavity 7 and a second buffer cavity 10. The cylinder body forms a buffer cavity for containing oil, and in one embodiment, the middle part of the piston rod 3 is provided with a boss, and the outer peripheral surface of the boss is in sealing fit with the inner wall of the cylinder body so as to divide the buffer cavity into a front buffer cavity 7 and a rear buffer cavity 10. It should be noted that the front-back direction in the present application is only for distinguishing two opposite directions of the vibration absorber, and is not used to limit the absolute position of the use state of the vibration absorber, and is referred to as the back direction in the direction from the first buffer chamber 7 to the second buffer chamber 10, and conversely as the front direction. The first buffer cavity 7 is communicated with a low-pressure oil return oil way, and the second buffer cavity 10 is communicated with a high-pressure oil way.
The interior of the piston rod 3 has a communication passage having a first communication port 16 at one end thereof communicating with the first cushion chamber 7 and a second communication port 11 at the other end thereof communicating with the second cushion chamber 10. That is, the first buffer chamber 7 and the second buffer chamber 10 are communicated by the communication passage, and the paths of the specific communication passage, the first communication port 16 and the second communication port 11 may be set as required, and are not particularly limited herein. In one embodiment, the communication channel is disposed in a radial direction of the piston rod 3, such as in an axial position of the piston rod 3. The first communication port 16 and the second communication port 11 extend onto the outer peripheral surface of the piston rod 3, respectively, so as to communicate with the first cushion chamber 7 and the second cushion chamber 10, respectively.
The buffer sleeve 12 is installed in the cylinder body, and is static relative to the cylinder body, and the piston rod 3 is slidably arranged in the buffer sleeve 12 in a penetrating way. When the piston rod 3 is not impacted, the front end of the cushion collar 12 is flush with the rear end of the second communication port 11 or is positioned in the middle of the second communication port 11. I.e. the piston rod 3 moves relative to the damping sleeve 12 when sliding back and forth. Note that the middle portion of the second communication port 11 herein refers to a position between the front end and the rear end of the second communication port 11, and is not limited to the center. When the piston rod 3 is not impacted, if the drill rod 17 abuts against the piston rod 3 and rock drilling is not performed, the front end of the buffer sleeve 12 is flush with the rear end of the second communication port 11 or is located in the middle of the second communication port 11, when the piston rod 3 is impacted, the piston rod moves backwards, the area of an inlet of the second communication port 11 under the covering condition of the buffer sleeve 12 is gradually reduced, the oil return resistance of the second buffer cavity 10 is gradually increased, the acting force of the second buffer cavity 10 is larger than the abutting force of the drill rod 17, the piston rod 3 is gradually decelerated, when the piston rod 3 is gradually decelerated to zero, reverse motion is started until the piston rod returns to a balance position, and a buffer process is completed.
The vibration absorber provided by the invention is applied to a rock drilling machine as an example, and for the convenience of description, the direction from the first buffer chamber 7 to the second buffer chamber 10 is marked as backward, and vice versa. In the process that the drill rod 17 tightly abuts against the piston rod 3 and rock drilling is not carried out, the piston rod 3 is pushed to move backwards by the tightening force, at the moment, high-pressure oil in the second buffer cavity 10 is discharged into the first buffer cavity 7 through the second communication port 11 in the piston rod 3 to return oil, along with the backward movement of the piston rod 3, the area of an inlet of the second communication port 11 under the covering of the buffer sleeve 12 is gradually reduced, the oil return resistance is gradually increased, at the moment, the acting force of the second buffer cavity 10 is gradually increased until the acting force is equal to the tightening force, and the piston rod 3 reaches a balance position. In the process of drilling the rock by the drill rod 17, the instantaneous impact force of the rock drill acts on the piston rod 3, the piston rod 3 instantly obtains the backward movement speed and starts to move, at the moment, high-pressure oil in the second buffer cavity 10 needs to be discharged into the first buffer cavity 7 through the second communication port 11 on the piston rod 3 for oil return, along with the backward movement of the piston rod 3, the area of an inlet of the second communication port 11 under the covering of the buffer sleeve 12 is gradually reduced, the oil return resistance is gradually increased, at the moment, the acting force of the second buffer cavity 10 is gradually increased, and along with the fact that the acting force of the second buffer cavity 10 is larger than the abutting force of the drill rod 17, the piston rod 3 is gradually decelerated; when the piston rod 3 gradually decelerates to zero, the piston rod 3 starts to accelerate reversely, that is, the piston rod 3 moves forwards, the acting force of the second buffer chamber 10 gradually decreases along with the forward movement of the piston rod 3, when the piston rod moves forwards to the balance position, the reverse deceleration process starts, the process is repeated until the piston rod returns to the balance position again after the deceleration reaches zero, and finally, the process stops at the balance position, that is, the buffer process is completed. To sum up, adopt this bump leveller, can effectively absorb the impact energy of rock drill etc. through the mode of hydraulic pressure buffering, the structural design of intercommunication mouth and cushion chamber makes piston rod 3 can the rapid movement to balanced position, has realized the high frequency response to the impact.
In one embodiment, the first communication port 16 and the second communication port 11 are both provided in the radial direction of the piston rod 3. So that the path of the first communication hole 16 and the second communication hole is shortest to facilitate the flow of oil. Further, the piston rod 3 is provided with a plurality of first communication ports 16 and a plurality of second communication ports 11, the plurality of first communication ports 16 are uniformly distributed along the circumferential direction of the piston rod 3, and the plurality of second communication ports 11 are uniformly distributed along the circumferential direction of the piston rod 3. Through the setting of a plurality of second intercommunication mouths 11, can enough satisfy the demand of fluid circulation, and under the certain circumstances of total flux, the diameter of each second intercommunication mouth 11 can be littleer to the high frequency response of carrying on that can be better, with the realization high frequency bears towards.
In order to facilitate the installation of the buffer sleeve 12 and the guidance of the piston rod 3, the buffer device further comprises a relatively static rear support sleeve 14 installed in the cylinder body, the piston rod 3 slidably penetrates through the rear support sleeve 14 and is sealed with the rear support sleeve 14, a mounting groove is formed in the rear support sleeve 14, the buffer sleeve 12 is arranged in the mounting groove, and a second buffer cavity 10 is defined by the inner wall of the cylinder body, the outer wall of the piston rod 3, the front end of the rear support sleeve 14 and the front end of the buffer sleeve 12. That is, the rear support sleeve 14 is fixed with respect to the cylinder body, and when the piston rod 3 slides forward and backward with respect to the cylinder body, it slides forward and backward with respect to the rear support sleeve 14. Specifically, the rear support sleeve 14 is in clearance fit with the inner surface of the circular through hole of the cylinder body and is sealed by a seal ring. A circular through hole is formed in the middle of the rear supporting sleeve 14, and the piston rod 3 is in clearance fit with the inner surface of the circular through hole of the rear supporting sleeve 14 and is sealed through a sealing ring. Under the condition that the cylinder body comprises a cylinder body 8, a front end cover 4 and a rear end cover 15, the front end of the rear supporting sleeve 14 is specifically in contact positioning with the cylinder body 8, and the rear end of the rear supporting sleeve 14 is in contact positioning with the rear end cover 15, so that static installation is realized. A round blind hole is specifically processed in the middle of the rear end cover 15, and the rear supporting sleeve 14 is in clearance fit with the inner surface of the round blind hole of the rear end cover 15. Cushion collar 12 sets up in the mounting groove, and the processing has the circular port in the middle of the supporting sleeve 14 behind concrete, cushion collar 12 and the circular port internal surface clearance fit of back supporting sleeve 14. The rear end of the buffer sleeve 12 is in contact with the rear supporting sleeve 14 for positioning, and the front end of the buffer sleeve 12 is axially positioned through a circlip. Due to the arrangement of the rear supporting sleeve 14, on the one hand, the installation of the buffer sleeve 12 is facilitated, and on the other hand, the sliding of the piston rod 3 can be guided.
In one embodiment, a rear supporting ring groove is formed on the inner wall of the rear supporting sleeve 14, a rear static pressure groove 13 is formed between the rear supporting ring groove and the outer wall of the piston rod 3, and the rear static pressure groove 13 is communicated with the high-pressure oil path. That is, high-pressure oil is introduced into the rear static pressure groove 13, so that static pressure supporting guide is formed between the rear supporting sleeve 14 and the piston rod 3, and friction force in the reciprocating motion process of the piston rod 3 is reduced, and meanwhile, radial unbalance loading force caused by non-axial impact can be borne, so that high-frequency response of the piston rod 3 can be better realized. The rear support sleeve 14 and the piston rod 3 may be connected in a sealing manner by other low-friction high-frequency-response sealing manners as required.
On the basis of the above embodiments, the cylinder further comprises a front support sleeve 5 which is relatively static and is installed in the cylinder body, the piston rod 3 slidably penetrates through the front support sleeve 5 and is sealed with the front support sleeve 5, and a first buffer cavity 7 is defined by the inner wall of the cylinder body, the outer wall of the piston rod 3 and the rear end of the front support sleeve 5. That is, the front support sleeve 5 is fixed with respect to the cylinder body, and the piston rod 3 slides back and forth with respect to the front support sleeve 5 when sliding back and forth with respect to the cylinder body. Specifically, a circular through hole is processed in the middle of the cylinder body, and the front support sleeve 5 is in clearance fit with the inner surface of the circular through hole of the cylinder body and is sealed through a seal ring. A circular through hole is processed in the middle of the front support sleeve 5, and the piston rod 3 is in clearance fit with the inner surface of the circular through hole of the front static pressure support sleeve and is sealed through a sealing ring. Under the condition that the cylinder body comprises a cylinder body 8, a front end cover 4 and a rear end cover 15, the rear end of the front supporting sleeve 5 is specifically in contact positioning with the cylinder body 8, and the front end of the front supporting sleeve 5 is in contact positioning with the front end cover 4, so that static installation is realized. A circular through hole is specifically processed in the middle of the front end cover 4, and the front support sleeve 5 is in clearance fit with the inner surface of the circular through hole of the front end cover 4. The sliding of the piston rod 3 can be guided by the arrangement of the front support sleeve 5.
Further, the part of the piston rod 3 located in the first buffer cavity 7 is provided with a step part protruding along the radial direction, a counter bore matched with the step part is formed in the rear end face of the front support sleeve 5, the inner diameter of the counter bore is larger than the outer diameter of the front step part, when the piston rod 3 is not impacted, the step part is located behind the counter bore, and the distance between the specific step part and the counter bore can be set as required. Through the arrangement, after the abutting force of the drill rod 17 is suddenly removed or the piston rod 3 rebounds forwards at an overlarge speed, the piston rod 3 moves forwards, when the piston rod 3 moves to the stroke end, the step part on the piston rod 3 enters the counter bore of the front supporting sleeve 5, at the moment, hydraulic oil between the counter bore of the front supporting sleeve 5 and the step part on the piston rod 3 needs to pass through a gap formed between the peripheral surface of the step part on the piston rod 3 and the inner surface of the counter bore of the front supporting sleeve 5, and can be discharged through the second buffer cavity 10, so that the oil return resistance is increased, and the speed of the piston rod 3 is reduced. Through the buffer action of the forward movement of the piston rod 3, the rigid impact of the piston rod 3 on the front supporting sleeve 5 can be avoided, the effective protection effect is achieved, and the safety of the vibration absorber is improved.
In one embodiment, the inner wall of the front support sleeve 5 is provided with a front support ring groove, a front static pressure groove 6 is formed between the front support ring groove and the outer wall of the piston rod 3, and the front static pressure groove 6 is communicated with the high-pressure oil path. Namely, high-pressure oil is introduced into the forward static pressure groove 6, so that static pressure supporting guide is formed between the front supporting sleeve 5 and the piston rod 3, the friction force in the reciprocating motion process of the piston rod 3 is reduced, and meanwhile, the radial unbalance loading force caused by non-axial impact can be borne, so that the piston rod 3 can better realize high-frequency response. According to the requirement, the front support sleeve 5 and the piston rod 3 can be connected in a sealing mode through other low-friction high-frequency-response sealing modes.
In one embodiment, the oil distribution valve block 9 is fixed outside the cylinder body, and a first oil distribution channel communicated with the first buffer cavity 7 and a second oil distribution channel communicated with the second buffer cavity 10 are arranged in the oil distribution valve block 9. The lower end of the oil distribution valve block 9 is positioned in contact with the upper end of the cylinder body. When the vibration absorber is used for buffering, the first buffer chamber 7 and the second buffer chamber 10 can both pass through the continuous circulating oil of the oil distribution valve block 9, the first communication port 16 and the second communication port 11, so that hot oil generated by throttling action is discharged, and the buffer failure caused by overhigh temperature of the oil is avoided.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A vibration absorber is characterized by comprising a cylinder body and a piston rod which is arranged in the cylinder body in a sliding way, the front end of the piston rod extends out of the cylinder body, the outer edge of the middle part of the piston rod is in sealing fit with the inner wall of the cylinder body so as to divide the inner cavity of the cylinder body into a first buffer cavity and a second buffer cavity, the first buffer cavity is communicated with a low-pressure oil return oil way, the second buffer cavity is communicated with a high-pressure oil way, a communicating channel is arranged inside the piston rod, one end of the communicating channel is provided with a first communicating port communicated with the first buffer cavity, the other end of the communicating channel is provided with a second communicating port communicated with the second buffer cavity, a buffer sleeve is arranged in the cylinder body and is static relative to the cylinder body, the piston rod can be slidably arranged in the buffer sleeve in a penetrating way, and when the piston rod is not impacted, the front end of the buffer sleeve is flush with the rear end of the second communicating port or is positioned in the middle of the second communicating port.
2. The vibration absorber according to claim 1 wherein said first communication port and said second communication port are both disposed in a radial direction of said piston rod.
3. The vibration absorber according to claim 2 wherein a plurality of said first communication ports and a plurality of said second communication ports are provided in said piston rod, and a plurality of said first communication ports are evenly distributed in a circumferential direction of said piston rod, and a plurality of said second communication ports are evenly distributed in the circumferential direction of said piston rod.
4. The vibration absorber as recited in claim 1, further comprising a relatively stationary rear support sleeve mounted within the cylinder body, wherein the piston rod is slidably disposed through and sealed to the rear support sleeve, wherein the rear support sleeve is provided with a mounting groove, the cushion sleeve is disposed in the mounting groove, and the inner wall of the cylinder body, the outer wall of the piston rod, the front end of the rear support sleeve and the front end of the cushion sleeve define the second cushion chamber.
5. The vibration absorber as recited in claim 4, wherein a rear supporting ring groove is formed on an inner wall of the rear supporting sleeve, a rear static pressure groove is formed between the rear supporting ring groove and an outer wall of the piston rod, and the rear static pressure groove is communicated with the high pressure oil path.
6. The vibration absorber according to any one of claims 1-5 further comprising a relatively stationary front support sleeve mounted within said cylinder, said piston rod slidably disposed through and sealed to said front support sleeve, said inner wall of said cylinder, said outer wall of said piston rod and said rear end of said front support sleeve defining said first buffer chamber.
7. The vibration absorber as recited in claim 6, wherein the portion of the piston rod located in the first buffer chamber has a step portion protruding in the radial direction, a counter bore for engaging with the step portion is opened on the rear end surface of the front support sleeve, the inner diameter of the counter bore is larger than the outer diameter of the step portion, and the step portion is located behind the counter bore when the piston rod is not impacted.
8. The vibration absorber as recited in claim 6, wherein a front supporting ring groove is formed on an inner wall of the front supporting sleeve, a front static pressure groove is formed between the front supporting ring groove and an outer wall of the piston rod, and the front static pressure groove is communicated with the high pressure oil path.
9. The vibration absorber according to claim 1 wherein said cylinder includes a cylinder body open at both ends and front and rear end caps fixedly attached to both front and rear ends of said cylinder body, said front end cap having a through hole for said piston rod to pass therethrough.
10. The vibration absorber of claim 1 further comprising an oil distribution valve block fixed outside said cylinder block, said oil distribution valve block having a first oil distribution passage in communication with said first buffer chamber and a second oil distribution passage in communication with said second buffer chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210094231.8A CN114427557B (en) | 2022-01-26 | 2022-01-26 | Vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210094231.8A CN114427557B (en) | 2022-01-26 | 2022-01-26 | Vibration absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114427557A true CN114427557A (en) | 2022-05-03 |
| CN114427557B CN114427557B (en) | 2024-06-14 |
Family
ID=81313960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210094231.8A Active CN114427557B (en) | 2022-01-26 | 2022-01-26 | Vibration absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114427557B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2615406Y (en) * | 2003-04-29 | 2004-05-12 | 天津特***压股份有限公司 | Piston type single-action damper hydraulic cylinder |
| JP2005163917A (en) * | 2003-12-03 | 2005-06-23 | Toyota Industries Corp | Hydraulic cylinder in industrial vehicle |
| US20140060315A1 (en) * | 2012-08-30 | 2014-03-06 | Showa Corporation | Shock absorber and valve member |
| CN204061414U (en) * | 2014-09-06 | 2014-12-31 | 蚌埠液力机械有限公司 | Steady buffering type lift oil tank |
| CN105275382A (en) * | 2015-10-23 | 2016-01-27 | 山河智能装备股份有限公司 | Hydraulic rock drill double-buffer device |
| CN109654086A (en) * | 2019-01-02 | 2019-04-19 | 中船重工中南装备有限责任公司 | A kind of loaded hydraulic cylinder of high frequency |
| CN109780000A (en) * | 2019-01-31 | 2019-05-21 | 中国铁建重工集团有限公司 | A kind of absorbing cylinder |
| CN111425483A (en) * | 2020-04-17 | 2020-07-17 | 河海大学常州校区 | Oil cylinder tail end buffering device |
-
2022
- 2022-01-26 CN CN202210094231.8A patent/CN114427557B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2615406Y (en) * | 2003-04-29 | 2004-05-12 | 天津特***压股份有限公司 | Piston type single-action damper hydraulic cylinder |
| JP2005163917A (en) * | 2003-12-03 | 2005-06-23 | Toyota Industries Corp | Hydraulic cylinder in industrial vehicle |
| US20140060315A1 (en) * | 2012-08-30 | 2014-03-06 | Showa Corporation | Shock absorber and valve member |
| CN204061414U (en) * | 2014-09-06 | 2014-12-31 | 蚌埠液力机械有限公司 | Steady buffering type lift oil tank |
| CN105275382A (en) * | 2015-10-23 | 2016-01-27 | 山河智能装备股份有限公司 | Hydraulic rock drill double-buffer device |
| CN109654086A (en) * | 2019-01-02 | 2019-04-19 | 中船重工中南装备有限责任公司 | A kind of loaded hydraulic cylinder of high frequency |
| CN109780000A (en) * | 2019-01-31 | 2019-05-21 | 中国铁建重工集团有限公司 | A kind of absorbing cylinder |
| CN111425483A (en) * | 2020-04-17 | 2020-07-17 | 河海大学常州校区 | Oil cylinder tail end buffering device |
Non-Patent Citations (1)
| Title |
|---|
| 耿晓光;马飞;李叶林;: "液压凿岩机双缓冲***的特性分析与动态仿真", 机床与液压, no. 19, 15 October 2015 (2015-10-15) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114427557B (en) | 2024-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI121139B (en) | Hydraulic hammer and tool sleeve | |
| AU2011282322B2 (en) | Hydraulic oil cylinder, hydraulic cushion system, excavator and concrete pump truck | |
| JP4791552B2 (en) | Damping device and excavator equipped with the damping device | |
| CN108779826B (en) | Recoil suppression hydraulic damper for train connecting device | |
| US4424737A (en) | Stroke cushioning apparatus for hydraulic cylinders | |
| CN203161708U (en) | Buffering hydraulic oil cylinder | |
| US6443271B2 (en) | Shock absorber with cup-shaped stop cap | |
| ES2189648B1 (en) | VIBRATION SHOCK ABSORBER. | |
| CN109654086B (en) | High-frequency loaded hydraulic cylinder | |
| WO2012088836A1 (en) | Piston cylinder | |
| JP2006052848A (en) | Low percussion gas spring | |
| CN114427557A (en) | Vibration absorber | |
| CN210769980U (en) | Buffer, shock absorber and vehicle | |
| US5992584A (en) | Dashpot for power cylinder | |
| CN109780000B (en) | Vibration absorption cylinder | |
| EP1724501A1 (en) | Hermetically sealing device | |
| CN113323935B (en) | Novel check valve buffer structure | |
| US4703838A (en) | Recoil damper for a reciprocating member | |
| FI13127Y1 (en) | Arrangement in a pneumatic cylinder | |
| CN114962388B (en) | Buffer piston and oil cylinder with same | |
| CN219888598U (en) | Shock absorber guider for increasing restoring hydraulic buffering force | |
| CN220268296U (en) | Damper for shock absorber | |
| CN215059099U (en) | Buffering element and power head buffering device with same | |
| CN219529462U (en) | Hydraulic buffer oil cylinder | |
| CN220581424U (en) | Detachable hydraulic cylinder buffer mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |