CN107975514B - Oil cylinder and crusher - Google Patents
Oil cylinder and crusher Download PDFInfo
- Publication number
- CN107975514B CN107975514B CN201711443911.1A CN201711443911A CN107975514B CN 107975514 B CN107975514 B CN 107975514B CN 201711443911 A CN201711443911 A CN 201711443911A CN 107975514 B CN107975514 B CN 107975514B
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- China
- Prior art keywords
- piston rod
- oil
- cylinder
- cavity
- crusher
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- 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.)
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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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
-
- 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
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2853—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using potentiometers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Actuator (AREA)
Abstract
The application relates to an oil cylinder and a crusher. The oil cylinder comprises a cylinder barrel, a piston rod and a displacement control mechanism, wherein the displacement control mechanism is used for closing a working oil path of the oil cylinder when the piston rod extends out of the cylinder barrel for a preset distance. The working oil way of the oil cylinder is closed when the piston rod stretches out for a preset distance relative to the cylinder barrel through the displacement control mechanism, the stretching distance of the piston rod is accurately controlled, and the reset can be accurately realized after the piston rod is pressed, so that the reliability is high and the implementation is good.
Description
Technical Field
The application relates to the technical field of engineering machinery, in particular to an oil cylinder and a crusher.
Background
The impact crusher is used for crushing medium-low hardness materials, and is widely applied to crushing materials in various occasions such as mines, quarries, construction waste treatment and the like. The discharge size can be adjusted by adjusting the size of the discharge opening of the impact crusher, so that the requirements of different material particle sizes are met; in order to ensure uniform discharge granularity and avoid hard materials such as iron blocks from entering the cavity of the crusher to damage a main machine, the discharge port regulating system also has overload over-iron protection and reset functions.
The traditional impact plate adjusting system adopts steel wire springs to realize overload protection, and has large structural size and weight. The adjusting operation is complex, and particularly when a large pretightening force is needed, the tightening torque is huge, and the operation is very difficult.
In the prior art, the size of the discharge hole is adjusted by using the oil cylinder, and the adjustment is convenient, but the defect of inaccurate resetting exists.
Disclosure of Invention
In order to overcome the technical defects, the technical problem solved by the application is to provide the oil cylinder and the crusher, and the telescopic reset of the oil cylinder can be accurately realized.
In order to solve the technical problems, the application provides an oil cylinder, which comprises a cylinder barrel, a piston rod and a displacement control mechanism, wherein the displacement control mechanism is used for closing a working oil path of the oil cylinder when the piston rod extends out of the cylinder barrel by a preset distance.
Further, the displacement control mechanism comprises a controller and a displacement sensor, the displacement sensor is used for detecting the extending displacement of the piston rod relative to the cylinder barrel and feeding back to the controller, and the controller is used for closing a working oil way of the oil cylinder when the displacement is consistent with a preset distance.
Further, the displacement sensor comprises a detection rod extending into the piston and the piston rod and a ring magnet which is arranged in the piston and is sleeved with the detection rod.
Further, the displacement control mechanism comprises a controller and a trigger piece which can be fixed relative to the piston rod, and the trigger piece is used for triggering the controller to close a working oil way of the oil cylinder when the piston rod extends out of a preset distance.
Further, the triggering piece is an annular baffle plate which is arranged in a rod cavity of the oil cylinder and is sleeved on the piston rod in a sliding manner, the rod cavity is divided into a first cavity and a second cavity which are far away from and close to the piston respectively by the annular baffle plate, and the triggering piece is fixed relative to the piston rod and is realized by closing an oil supply circuit of the second cavity.
Further, the controller comprises a travel switch arranged on the cylinder barrel and used for being triggered by the annular baffle to close a working oil way of the oil cylinder when the piston rod stretches out of the preset distance.
Further, a hollow cavity communicated with the second cavity is arranged in the piston rod, a piston rod oil port communicated with the hollow cavity is arranged at the extending end of the piston rod, and an oil supply way is used for feeding oil into or returning oil from the second cavity through the piston rod oil port and the hollow cavity.
The application also provides a crusher, which comprises the oil cylinder, wherein the oil cylinder is used for adjusting the size of a discharge hole of the crusher.
Further, the device also comprises a frame, a counterattack plate and a rotor, wherein the cylinder barrel is fixedly arranged with the frame, and the counterattack plate is connected with the extending end of the piston rod.
Further, the crusher is a counterattack crusher.
Therefore, based on the technical scheme, the oil cylinder is provided with the displacement control mechanism, the working oil way of the oil cylinder is closed when the piston rod stretches out of the cylinder barrel by the preset distance through the displacement control mechanism, the stretching distance of the piston rod is accurately controlled, and the reset can be accurately realized after the piston rod is pressed, so that the oil cylinder is high in reliability and good in practicability. The crusher provided by the application has the advantages that the oil cylinder enables accurate resetting and has higher feasibility.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of an embodiment of an oil cylinder according to the present application;
fig. 2 is a schematic structural view of an embodiment of the crusher according to the application.
Each reference numeral represents:
1. an oil cylinder; 11. a cylinder bottom; 12. a cylinder; 12-1, a rodless cavity oil port; 12-2, an oil port of the rod cavity is formed; 13. a piston; 14. a trigger; 15. a guide sleeve; 16. a piston rod; 16-1, a club head; 16-2, a rod body; 16-3, core tube; 16-4, earrings; 16-5, connecting an oil port; 16-6, an oil port of a piston rod; 17. a displacement sensor; 18. a ring magnet; 19. a magnetic isolation gasket; 20. a travel switch; A. a rodless cavity; B. a first chamber; C. a second chamber.
Detailed Description
The technical scheme of the application is further described in detail through the drawings and the embodiments.
The specific embodiments of the present application are to facilitate further explanation of the concept of the present application, the technical problems to be solved, the technical features constituting the technical solutions, and the technical effects brought thereby. The description of these embodiments does not limit the present application. The technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
In an exemplary embodiment of the cylinder according to the present application, as shown in fig. 1, the cylinder 1 includes a cylinder bottom 11, a cylinder tube 12, a piston 13, a guide sleeve 15, a piston rod 16, and a displacement control mechanism for closing a working oil path of the cylinder 1 when the piston rod 16 protrudes a predetermined distance with respect to the cylinder tube 12.
In this exemplary embodiment, the cylinder 1 is provided with the displacement control mechanism, by which the working oil path of the cylinder is closed when the piston rod 16 extends a preset distance with respect to the cylinder tube 12, the extension of the piston rod 16 is stopped, the extension distance of the piston rod 16 is accurately controlled, and the reset can be accurately realized after the piston rod is pressed, so that the reliability is high, and the implementation is good.
As a first preferred implementation of the displacement control mechanism, as shown in fig. 1, the displacement control mechanism includes a controller and a displacement sensor 17, the displacement sensor 17 is used for detecting the displacement of the extension of the piston rod 16 relative to the cylinder tube 12 and feeding back to the controller, and the controller is used for closing the working oil path of the cylinder 1 when the extension displacement of the piston rod 16 coincides with a preset distance. The setting of displacement sensor can accurately learn the extension displacement of piston rod 16, when extension displacement reaches preset distance, the controller closes the working oil circuit of hydro-cylinder 1, and the oil circuit of no rod chamber A and the rod chamber of hydro-cylinder 1 all is sealed, and piston rod 16 stably stays in preset distance position department, has higher practicality.
In a specific embodiment, as shown in fig. 1, the displacement sensor 17 preferably comprises a detection rod extending into the piston 13 and the piston rod 16, and a ring magnet 18 arranged in the piston 13 and surrounding the detection rod, and the detection accuracy is high through practice, and a magnetism isolating gasket 19 is further arranged at a position close to the ring magnet 18.
Of course, the displacement sensor may also be a displacement sensor of other structural form, such as a photoelectric sensor.
As a second preferred implementation of the displacement control mechanism, as also shown in fig. 1, the displacement control mechanism comprises a controller and a trigger 14 fixable relative to the piston rod 16, the trigger 14 being adapted to trigger the controller to close the working oil circuit of the cylinder 1 when the piston rod 16 extends a preset distance. The trigger piece 14 can be fixedly arranged on the piston rod 16, when the preset extending distance of the piston rod 16 needs to be adjusted, the fixed position of the trigger piece 14 relative to the piston rod 16 is changed, when the piston rod 16 extends a new preset extending distance, the trigger piece 14 triggers the controller, the controller closes the working oil way of the oil cylinder 1, and the piston rod 16 stably stays at the new preset extending distance, so that the high-practicability is realized. When the piston rod 16 receives external pressure and retracts, the trigger piece 14 is fixed relative to the piston rod 16, when the external pressure disappears, the piston rod 16 is re-extended to a preset distance position, the trigger piece 14 re-triggers the controller, the controller closes a working oil way of the oil cylinder 1, the piston rod 16 stays at the preset distance position stably, and therefore accurate resetting of the oil cylinder is achieved, and the high practicability is achieved.
For how the fixed position of the trigger 14 relative to the piston rod 16 is adjustable, in a preferred embodiment, as shown in fig. 1, the trigger 14 is an annular baffle plate disposed in a rod cavity of the cylinder 1 and slidably sleeved on the piston rod 16, the annular baffle plate divides the rod cavity into a first cavity B and a second cavity C far from and near to the piston 13, respectively, the position of the trigger 14 relative to the piston rod 16 is adjustable by supplying oil to the first cavity B and the second cavity C, and the fixation of the trigger 14 relative to the piston rod 16 is achieved by closing an oil supply path of the second cavity C. Specifically or preferably, as shown in fig. 1, the controller includes a travel switch 20 provided on the cylinder tube 12 for being triggered by the annular shutter to close the working oil path of the cylinder 1 when the piston rod 16 extends a preset distance, which is easy to implement and high in practical applicability.
In order to ensure that the oil supply path reliably feeds or returns oil to the second cavity C and prevent the piston rod from blocking the oil supply of the second cavity C during the expansion and contraction process, in a specific or preferred embodiment, as shown in fig. 1, the piston rod 16 includes a rod head 16-1, a rod body 16-2 and a core tube 16-3, a hollow cavity communicated with the second cavity C is arranged in the piston rod 16, the hollow cavity is communicated with the second cavity C through a connecting oil port 16-5, an extending end of the piston rod 16 is provided with a piston rod oil port 16-6 communicated with the hollow cavity, and the oil supply path feeds or returns oil to the second cavity C through the piston rod oil port 16-6 and the hollow cavity.
Of course, the displacement control mechanism in the oil cylinder of the application can simultaneously comprise a displacement sensor 17 and a trigger piece 14, which work cooperatively to ensure the positioning accuracy of the piston rod.
The application also provides a crusher, which comprises the oil cylinder 1, wherein the oil cylinder 1 is used for adjusting the size of a discharge hole of the crusher. The oil cylinder is applied to the crusher to adjust the size of the discharge opening of the crusher, so that the automatic adjustment of the discharge opening is realized, and the overload iron passing and automatic resetting functions are realized. The oil cylinder is particularly suitable for the impact crusher.
In a specific or preferred embodiment of the crusher according to the application, as shown in fig. 2, the crusher further comprises a frame 2, a striking plate 3 and a rotor 4, a cylinder 12 being fixedly arranged with the frame, the striking plate 3 being connected to an ear ring 16-4 at the projecting end of a piston rod 16, the striking plate 3 and the rotor 4 forming a discharge opening of the crusher.
The following description will take the embodiment shown in fig. 1 and 2 as an example to illustrate the working procedure of the oil cylinder applied to the crusher according to the present application as follows:
in an initial state, the rotor 4 is stationary and is positioned at a designated position, the size of a discharge hole is determined by the distance between the impact plate 3 and the rotor 4, the size of the discharge hole is input to a controller, the controller can convert the size of the discharge hole into a preset distance for the movement of the piston rod 16 according to a set program, the piston rod 16 is connected with the impact plate 3, the rodless cavity oil port 12-1 of the rodless cavity A is used for oil feeding, the rod cavity oil port 12-2 of the first cavity B is used for oil feeding, the piston rod oil port 16-6 of the second cavity C is used for oil feeding, the piston 13, the piston rod 16 and the impact plate 3 can be pushed to move forwards, after the impact plate 3 is contacted with the rotor 4, the controller is used for receiving a command, the rod cavity oil port 12-2 is used for oil feeding, the rodless cavity oil port 12-1 is used for oil feeding, and the piston rod 16 drives the impact plate 3 to move backwards for a preset distance, and automatic adjustment of the discharge hole can be realized.
After the size of the discharge hole is adjusted, the oil way of the rodless cavity A is closed, the second cavity C is filled with oil through the oil port 16-6 of the piston rod and the connecting oil port 16-5, the oil port 12-2 of the rod cavity returns oil, the oil pushes the trigger piece 14 to move towards the guide sleeve 15, the trigger piece 14 moves to the terminal to press the travel switch 20, the controller obtains signals, and the oil ways of the rodless cavity A, the first cavity B and the second cavity C are closed; when the system is overloaded and is over-charged, the pressure of the rodless cavity A of the oil cylinder 1 rises above a set value, the oil outlet 12-1 of the rodless cavity is drained, the oil outlet 12-2 of the rod cavity is filled with oil, the discharge port is enlarged, the overload and over-charged material is discharged, meanwhile, as the oil path of the second cavity C is closed, the trigger piece 14 moves along with the movement of the piston rod 16 to be far away from the guide sleeve 15, at the moment, the travel switch 20 is powered off, the controller obtains a signal, the oil inlet 12-1 of the rodless cavity is controlled to be filled with oil, the oil outlet 12-2 of the rod cavity is returned, the trigger piece 14 moves along with the movement of the piston rod 16 to be pressed against the travel switch 20 again, the oil paths of the rodless cavity A, the first cavity B and the second cavity C are closed, the counterattack plate 3 is reset, the discharge port is reset, and the whole working cycle is repeated, is realized overload and over-charged iron protection and automatic reset functions are realized.
The above-described examples are provided to illustrate embodiments of the present application in detail, but the present application is not limited to the described embodiments. For example, the oil cylinder of the application can also be applied to other engineering machinery vehicles. It will be apparent to those skilled in the art that various changes, modifications, equivalents, and variations can be made to these embodiments without departing from the principles and spirit of the application.
Claims (7)
1. An oil cylinder (1) is characterized by comprising a cylinder barrel (12), a piston (13), a piston rod (16) and a displacement control mechanism, wherein the displacement control mechanism is used for closing a working oil path of the oil cylinder (1) when the piston rod (16) extends out of a preset distance relative to the cylinder barrel (12);
the displacement control mechanism comprises a controller and a trigger piece (14) which can be fixed relative to the piston rod (16), wherein the trigger piece (14) is used for triggering the controller to close a working oil way of the oil cylinder (1) when the piston rod (16) stretches out by a preset distance;
the trigger piece (14) is an annular baffle plate which is arranged in a rod cavity of the oil cylinder (1) and is sleeved on the piston rod (16) in a sliding manner, the rod cavity is divided into a first cavity (B) and a second cavity (C) which are respectively far away from and close to the piston (13) by the annular baffle plate, and the trigger piece (14) is fixed relative to the piston rod (16) and is realized by closing an oil supply circuit of the second cavity (C);
the controller comprises a travel switch (20) arranged on the cylinder barrel (12) and is used for being triggered by the annular baffle to close a working oil way of the oil cylinder (1) when the piston rod (16) stretches out by a preset distance.
2. The cylinder (1) according to claim 1, characterized in that the displacement control mechanism comprises a controller and a displacement sensor (17), the displacement sensor (17) being adapted to detect the displacement of the piston rod (16) with respect to the extension of the cylinder tube (12) and to feed back to the controller, the controller being adapted to close the working oil circuit of the cylinder (1) when the displacement coincides with the preset distance.
3. Cylinder (1) according to claim 2, characterized in that the displacement sensor (17) comprises a detection rod extending into the piston (13) and piston rod (16) and a ring magnet (18) arranged in the piston (13) and surrounding the detection rod.
4. The oil cylinder (1) according to claim 1, wherein a hollow cavity communicated with the second cavity (C) is arranged in the piston rod (16), a piston rod oil port (16-6) communicated with the hollow cavity is arranged at the extending end of the piston rod (16), and the oil supply way is used for feeding oil into or returning oil from the second cavity (C) through the piston rod oil port (16-6) and the hollow cavity.
5. A crusher, characterized by comprising an oil cylinder (1) according to any one of claims 1-4, said oil cylinder (1) being adapted to adjust the size of a discharge opening of the crusher.
6. The crusher according to claim 5, further comprising a frame (2), a reaction plate (3) and a rotor (4), wherein the cylinder (12) is fixedly arranged with the frame, and wherein the reaction plate (3) is connected with the protruding end of the piston rod (16).
7. The crusher of claim 5, wherein the crusher is a counterattack crusher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711443911.1A CN107975514B (en) | 2017-12-27 | 2017-12-27 | Oil cylinder and crusher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711443911.1A CN107975514B (en) | 2017-12-27 | 2017-12-27 | Oil cylinder and crusher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107975514A CN107975514A (en) | 2018-05-01 |
| CN107975514B true CN107975514B (en) | 2023-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711443911.1A Active CN107975514B (en) | 2017-12-27 | 2017-12-27 | Oil cylinder and crusher |
Country Status (1)
| Country | Link |
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| CN (1) | CN107975514B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108679043B (en) * | 2018-06-29 | 2023-09-22 | 中铁工程装备集团有限公司 | Crusher oil cylinder and sealing monitoring system thereof |
| CN112024053B (en) * | 2020-09-18 | 2021-12-28 | 湖南三一快而居住宅工业有限公司 | Drive adjusting device and rubbing crusher |
| CN112555227B (en) * | 2020-11-20 | 2023-05-02 | 湖南三一快而居住宅工业有限公司 | Oil cylinder, automatic size adjustment system of material opening and crusher |
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| US5718389A (en) * | 1995-03-25 | 1998-02-17 | Krupp Fordertechnik Gmbh | Crushing machine and method for the automatic adjustment of the crushing gap thereof |
| JP2011158027A (en) * | 2010-02-01 | 2011-08-18 | Santest Co Ltd | Fluid pressure actuator which can detect position and load |
| CN104772187A (en) * | 2015-03-30 | 2015-07-15 | 南京梅山冶金发展有限公司 | Control method for automatic adjusting of roller gap of four-roller crusher |
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