CN104832495B - Hanging oil cylinder and crane - Google Patents
Hanging oil cylinder and crane Download PDFInfo
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- CN104832495B CN104832495B CN201510145187.9A CN201510145187A CN104832495B CN 104832495 B CN104832495 B CN 104832495B CN 201510145187 A CN201510145187 A CN 201510145187A CN 104832495 B CN104832495 B CN 104832495B
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- cylinder
- piston rod
- cylinder barrel
- suspension
- protective shell
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- 238000001514 detection method Methods 0.000 claims abstract description 101
- 238000013016 damping Methods 0.000 claims abstract description 36
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 239000003921 oil Substances 0.000 claims description 130
- 239000000725 suspension Substances 0.000 claims description 110
- 230000001681 protective effect Effects 0.000 claims description 59
- 238000000034 method Methods 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 11
- 239000010720 hydraulic oil Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 7
- 230000003139 buffering effect Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/265—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs hydraulic springs
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- 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
- F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2300/00—Indexing codes relating to the type of vehicle
- B60G2300/06—Cranes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a kind of hanging oil cylinder and crane, relate to technical field of engineering machinery.Solve prior art and there is the technical problem poor to adaptation ability complicated, bad working environments.This hanging oil cylinder includes cylinder barrel, piston rod, oil cylinder stroke detection device and vibration damping holder, cylinder barrel and piston rod one of them be connected with vibration damping holder；Oil cylinder stroke detection device includes moving body and detection module, oil cylinder stroke detection device includes detection module and moving body, detection module can moving body with send oil cylinder displacement detection signal corresponding with the position of moving body during detection module relative movement in real time；Both moving body and detection module one of them fixing with cylinder barrel is connected, wherein another is fixed with piston rod and is connected for both moving body and detection module.This crane includes the hanging oil cylinder that the present invention provides.The present invention is for improving hanging oil cylinder to complicated, the adaptation ability of bad working environments.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a suspension oil cylinder and a crane with the same.
Background
The suspension is a general term for all force transmission connection devices and connected elements between a vehicle frame (or a load-bearing vehicle body) and an axle (or a wheel), and the suspension mainly has the functions of transmitting all forces and moments acting between the wheel and the vehicle frame, relieving the impact generated when the vehicle runs through an uneven road surface, and attenuating the vibration (or understood as vibration) of a load-bearing system caused by the impact so as to ensure the running smoothness of the vehicle. The suspension mainly comprises an elastic element, a shock absorber, a guide mechanism, a transverse stabilizer bar and the like. The suspension has a separate suspension and a non-separate suspension. The axle is connected with the frame (or the bearing type vehicle body) through a suspension, and wheels are arranged at two ends of the axle. The function of the frame is mainly to support and connect all parts of the automobile and bear various loads from the inside and the outside of the automobile.
The all-terrain crane is a high-performance crane with the characteristics of an automobile crane and a cross-country crane, and has the functions of high driving speed, multi-axle driving, all-wheel steering, strong climbing capacity, adaptability to driving under complex road conditions and the like. All-terrain cranes typically use hydro-pneumatic suspension systems. The hydro-pneumatic suspension system is a suspension system which transmits pressure by oil and takes inert gas (usually N2) as an elastic medium, consists of an energy accumulator (equivalent to a spring) and a suspension oil cylinder with the function of a vibration damping shock absorber, and integrates the functions of a spring element and the vibration damping shock absorber of the traditional suspension system. Compared with the traditional suspension, the hydro-pneumatic suspension has good nonlinear rigidity characteristic and nonlinear damping characteristic, and can meet the requirement of smoothness of a vehicle to the maximum extent. Chassis suspensions of all-terrain cranes are generally divided into two types, one type is a non-independent suspension, and the other type is an independent suspension. The non-independent suspension is characterized in that wheels on two sides are arranged on an integral axle, and when the wheels on one side are impacted, the wheels on the other side can be directly affected. The independent suspension is characterized in that wheels at two sides are arranged on a disconnected axle, the wheels at two sides are respectively and independently elastically connected with a frame (or a vehicle body), and when the wheel at one side is impacted, the movement of the wheel at the other side does not directly influence the wheel at the other side.
The dependent suspension shown in fig. 1 is characterized in that the wheels on both sides are connected by a one-piece axle, and the axle 12 is connected with a vehicle frame 13 or a vehicle body through the suspension. If the road surface is uneven during driving, the wheel on one side is lifted, and the integral axle forces the wheel on the other side to move.
The independent suspension shown in fig. 2 differs from the non-independent suspension shown in fig. 1 in that: the axle is not integral, but consists of two half-bridges, a left half-bridge 22 and a right half-bridge 24. It is characterized in that: the axle is disconnected and each side wheel is individually connected to the frame 23 (or body) via a suspension, and each side wheel can independently hop.
The independent suspension has the advantages compared with the non-independent suspension as shown in fig. 2:
1. the engine can be installed in a lowered mode, the gravity center of the vehicle can be lowered, and the structure is compact;
2. the independent suspension allows the front wheel to have larger jumping space, is favorable for steering, and is convenient for selecting a soft spring element to improve the smoothness;
3. the independent suspension is not sprung, the mass is small, and the adhesiveness of the wheel can be improved;
4. the independent suspension can increase the ground clearance of the vehicle and improve the cross-country passing ability of the vehicle. Of course, the independent suspension has the defects of complex structure, high manufacturing cost, difficult maintenance and the like.
As shown in fig. 3 and 4, the two-section yoke independent suspension system is composed of two half-bridges, each of which is composed of two upper tie rods 35 and two lower tie rods 36, and a transmission shaft 38. Between the two half-bridges is a differential 37, to which a steering rod 39 is connected with the axle 34. The suspension system uses a common suspension oil cylinder which can be used on a non-independent suspension system and can also be used in an independent suspension system, the oil cylinder generally comprises a cylinder barrel, a piston rod and the like, the structure form is simple, and two ends of the oil cylinder are hinged. Because the upper pull rod 35 and the lower pull rod 36 play a role in guiding and positioning the suspension system, the oil cylinder is hinged, so that the oil cylinder can be prevented from playing a role in guiding and positioning, and the stress condition of the oil cylinder is better. The double-section fork arm independent suspension system has an upper pull rod structure and a lower pull rod structure, and the whole system is compact in space and complex in structure. Some independent suspension systems do not have an upper pull rod structure and only have a lower pull rod structure, so that the oil cylinder needs to play a certain guiding and positioning role, and the suspension systems can be more stable and more reliable in vibration reduction.
As shown in fig. 5, in the conventional suspension cylinder structure, the cylinder large chamber 9 is connected with the accumulator through the central oil pipe 43, and the small chamber 46 is connected with the accumulator through the damping hole 47, the check valve 48 and the oil storage chamber 45. The piston rod 41 is fixed with the outer protective shell 42. The upper end of the piston rod 41 is hinged with a corresponding structure of the frame, and the cylinder barrel 43 is hinged with a corresponding structure of the frame. The damping hole is used for generating larger damping force when the frame is stretched relative to the axle, and can play a role in vibration reduction. When the frame and the axle are compressed relatively, oil in the oil storage cavity can rapidly enter the small cavity through the damping hole 47 and the one-way valve 48, the piston rod 41 is subjected to smaller damping force when moving relative to the cylinder barrel 42, the oil passes through the large cavity 9 and compresses gas in the connected energy accumulator, and the oil cylinder mainly plays an elastic role at the moment and is equivalent to a spring of a traditional suspension.
The applicant found that: the prior art at least has the following technical problems:
in the prior art, the suspension oil cylinder is used in a non-independent suspension system and a double-section fork arm independent suspension system, has the advantages of better stress condition and the like, but has the following defects:
1. both ends of the oil cylinder are hinged, and the guiding and positioning functions cannot be realized. For independent suspension systems in which the cylinder is required to be oriented, the cylinder with this structure cannot be used generally.
2. The two bridges of the independent suspension are separated, and the impact on the single side is larger than that of the non-independent suspension, so that better requirements on the vibration reduction (the vibration reduction can also be understood as the vibration reduction) and the buffering effect of the oil cylinder are provided. The oil cylinder only realizes the vibration damping effect through the damping effect generated by the damping holes, and the vibration damping form is single.
3. In the prior art, a proximity switch is mostly adopted, only single-point detection can be carried out, continuous detection cannot be realized, the telescopic stroke of a suspension oil cylinder cannot be accurately detected, the telescopic stroke of the suspension oil cylinder cannot be accurately controlled, and the comfort and reliability of a driver are not good;
due to the defects, the technical problem that the prior art has poor adaptability to complex and severe working conditions is caused.
Disclosure of Invention
The invention provides a suspension oil cylinder and a crane with the same, and solves the technical problem that the prior art has poor adaptability to complex and severe working conditions. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the suspension oil cylinder provided by the embodiment of the invention comprises a cylinder barrel, a piston rod, an oil cylinder stroke detection device and a vibration damping support, wherein one of the cylinder barrel and the piston rod is connected with the vibration damping support;
the oil cylinder stroke detection device comprises a detection module and a moving body, wherein the detection module can send out an oil cylinder displacement detection signal corresponding to the position of the moving body in real time in the relative movement process of the moving body and the detection module;
one of the moving body and the detection module is fixedly connected with the cylinder barrel, and the other of the moving body and the detection module is fixedly connected with the piston rod.
As an optional implementation mode of any technical scheme of the invention, the oil cylinder stroke detection device is a magnetostrictive displacement sensor.
As an optional implementation manner of any technical scheme of the invention, the oil cylinder stroke detection device is positioned in the cylinder barrel and between the cylinder barrel and the piston rod.
As an optional implementation manner of any technical scheme of the invention, a first oil port and a second oil port are arranged on the outer surface of the cylinder barrel, a first chamber and a second chamber are formed between the cylinder barrel and the piston rod, and hydraulic oil entering the first chamber from the first oil port can drive the piston rod to extend out; the hydraulic oil entering the second chamber from the second oil port can drive the piston rod to retract;
the cylinder barrel is provided with a first mounting hole communicated with the first chamber, the piston rod is provided with a second mounting hole communicated with the first chamber, the detection module is fixed in the first mounting hole, and the moving body is fixed in the second mounting hole.
As an optional implementation manner of any technical scheme of the invention, the cylinder barrel is provided with a positioning screw hole communicated with the first mounting hole, and a positioning screw in threaded connection with the screw hole abuts against the detection module and locks the detection module in the first mounting hole.
As a preferable positioning method, in the present invention, the detection module or the movable body may be fixed by using a positioning screw, but the positioning screw may not be used.
As an optional implementation manner of any one of the technical solutions of the present invention, the detection module includes a detection rod, the moving body is an annular magnet, an oil chamber communicated with the second mounting hole is provided in the piston rod, the detection rod penetrates through a central hole of the moving body and is inserted into the oil chamber, and a gap is provided between the detection rod and an inner wall of the central hole.
And at least one damping hole and/or at least one-way valve are/is arranged on an oil path between the second oil port and the second chamber.
As an optional implementation manner of any technical scheme of the invention, the vibration reduction support comprises an anti-drop body, a connecting seat, an elastic pad and a spherical hinge bearing inner ring, wherein:
the connecting seat, the elastic cushion and the spherical hinge bearing inner ring are respectively provided with a connecting through hole; the anti-falling body is abutted against the part of the connecting seat departing from the cylinder barrel or the piston rod, and the anti-falling body is connected with one of the cylinder barrel and the piston rod through a detachable connecting structure;
in the radial direction of the connecting through hole on the connecting seat, a gap exists between the inner wall of the connecting through hole on the connecting seat and the inner ring of the spherical hinge bearing or the detachable connecting structure; and/or a gap exists between the elastic pad and the inner ring of the spherical hinge bearing in the radial direction of the connecting through hole on the connecting seat;
the elastic pad is arranged between the partial area of the connecting seat and the partial area of the inner ring of the spherical hinge bearing, and the elastic pad is respectively connected with the partial area of the connecting seat and the partial area of the inner ring of the spherical hinge bearing.
As an optional implementation manner of any technical scheme of the invention, the anti-falling body is connected with the cylinder barrel through the detachable connection structure, the piston rod is further fixedly connected with an outer-layer protective shell, the outer-layer protective shell is sleeved outside the cylinder barrel, and the cylinder barrel can slide relative to the outer-layer protective shell; or,
the anti-falling body is connected with the piston rod through the detachable connecting structure, the piston rod is fixedly connected with an inner-layer protective shell, and the cylinder barrel is fixedly connected with an outer-layer protective shell; the inner layer protective shell is sleeved outside the cylinder barrel, and the cylinder barrel is arranged between the inner layer protective shell and the piston at the tail end of the piston rod; the outer protective shell is sleeved outside the inner protective shell, and the inner protective shell can slide relative to the cylinder barrel and the outer protective shell.
As an optional implementation manner of any technical scheme of the invention, the anti-falling body is connected with the cylinder barrel through the detachable connection structure, a first guide sleeve is arranged between the inner wall of the outer-layer protective shell and the outer wall of the cylinder barrel, the first guide sleeve is fixedly connected with the outer-layer protective shell, and the first guide sleeve is respectively abutted against the inner wall of the outer-layer protective shell and the outer wall of the cylinder barrel;
and second guide sleeves are arranged between the inner wall of the outer protective shell and the outer wall of the cylinder barrel and between the inner wall of the cylinder barrel and the outer wall of the piston rod, are fixedly connected with the cylinder barrel, and are respectively abutted against the outer wall of the piston rod and the inner wall of the outer protective shell.
As an optional implementation manner of any technical scheme of the invention, the anti-drop body comprises an end cover, the end cover is provided with a mounting hole, the detachable connection structure is an anti-drop bolt, and a threaded part of the anti-drop bolt penetrates through the mounting hole and is in threaded connection with a threaded hole on the cylinder barrel.
As an optional implementation manner of any technical solution of the present invention, the spherical hinge bearing inner ring includes a base portion, an inner concave seam allowance disposed on the base portion, and an outer convex seam allowance fixedly connected with the base portion or having an integral structure, and the connecting through hole on the spherical hinge bearing inner ring is formed by the base portion and a hole on the outer convex seam allowance together;
the convex spigot is inserted into the connecting through hole on the connecting seat, and a gap is formed between the elastic pad and the convex spigot between the convex spigot and the inner wall of the connecting through hole on the connecting seat;
the positioning bulge on the cylinder barrel is embedded in the concave spigot, and the screw hole is formed in the positioning bulge.
As an optional implementation manner of any technical scheme of the invention, an outer convex cambered surface is arranged on the base part around the outer convex spigot, an inner concave cambered surface is arranged on the inner side of the connecting seat, and two side surfaces of the elastic pad are at least respectively bonded with the outer convex cambered surface and the inner concave cambered surface.
As an optional implementation manner of any technical scheme of the invention, a thin plate is further fixedly connected to the cylinder barrel, and the largest plane on the thin plate is perpendicular to the axial direction of the cylinder barrel.
The crane provided by the embodiment of the invention comprises a frame, an axle, a control system and a suspension oil cylinder provided by any technical scheme of the invention, wherein:
one of the frame and the axle is fixedly connected with the vibration reduction support, and is elastically connected with one of the cylinder barrel and the piston rod through the vibration reduction support;
the other of the frame and the axle is fixedly connected with the other of the cylinder barrel and the piston rod;
the suspension oil cylinder is internally provided with the oil cylinder stroke detection device, the oil cylinder stroke detection device can transmit the oil cylinder displacement detection signal to the control system, and the control system can receive the oil cylinder displacement detection signal and perform corresponding processing and can realize the displacement detection and stroke control functions of the suspension oil cylinder.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
the suspension oil cylinder provided by the embodiment of the invention is provided with the special vibration damping support which has vibration damping and buffering functions, so that the oil cylinder can swing at a certain free angle, and the rubber pad of the vibration damping support in the preferred scheme can be made of special rubber materials and has better vibration damping and buffering effects.
Meanwhile, the stroke information can detect the stroke of the piston rod relative to the cylinder barrel of the oil cylinder in real time, and the stroke information can support an operator or a control system to control the crane (for example, the accurate leveling of a chassis of the crane is realized, and the expansion stroke amount of the suspension oil cylinder is properly adjusted according to the road condition reflected by the stroke information), so that the performance of the chassis of the crane provided with the suspension oil cylinder is improved, and the crane can bring better comfort, reliability and other experiences to a driver in the walking process.
In addition, the preferable technical scheme of the technical schemes provided by the invention also has the following advantages:
1. structural design of protective shell
The suspension cylinder is designed into a protective shell structure, and is connected with the axle to play a role in guiding and positioning, so that the structure of the independent suspension system can be simplified, and the spatial arrangement of other structures is facilitated. The internal structure of the oil cylinder can be protected from being influenced by external dirt and the like, and the side load resistance of the oil cylinder can be enhanced.
2. The sealing effect is better
The side load forces are more disruptive to the seal. The suspension oil cylinder is provided with an outer-layer protective shell structure, so that the side load resistance of the oil cylinder can be enhanced, the sealing performance of the oil cylinder is greatly improved, and the working performance, the service life and the like of the suspension oil cylinder are improved due to the improvement of the sealing performance.
3. Built-in sensor
The hysteresis telescopic displacement sensor is positioned in the oil cylinder, a non-contact measuring method is adopted, friction and abrasion are not generated, the reliability and the stability are good, the precision of the displacement sensor can reach +/-0.1 mm, the precision is high, and the stroke can be detected in real time. The built-in telescopic displacement sensor improves the adaptability of the suspension oil cylinder to severe working conditions, and further improves the service performance of the crane.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of a prior art non-independent suspension configuration on a crane;
FIG. 2 is a schematic diagram of an independent suspension structure on a crane in the prior art;
FIG. 3 is a schematic front view of a double-section yoke independent suspension system of a crane in the prior art;
FIG. 4 is a schematic top view of a prior art dual yoke independent suspension system for a crane;
FIG. 5 is a schematic diagram of a structure of a suspension cylinder on a crane in the prior art;
FIG. 6 is a schematic cross-sectional view of a suspension cylinder according to the present invention;
FIG. 7 is a schematic cross-sectional view taken along line A-A of FIG. 6;
FIG. 8 is another schematic view of the suspension cylinder of FIG. 6;
FIG. 9 is a schematic cross-sectional view of another suspension cylinder provided by the present invention;
FIG. 10 is another schematic view of the suspension cylinder of FIG. 9;
reference numerals: 11. suspending the oil cylinder; 12. an axle; 13. a frame; 21. suspending the oil cylinder; 22. a left half-bridge; 23. a frame; 24. a right half-bridge; 31. a support is arranged on the oil cylinder; 32. a suspension cylinder; 33. dust-proof sealing; 34. an axle; 35. an upper pull rod; 36. a lower pull rod; 37. a differential mechanism; 38. a drive shaft; 39. a steering tie rod; 41. a piston rod; 42. an outer protective shell; 43. a central oil pipe; 44. a cylinder barrel; 45. an oil storage chamber; 46. a small cavity; 47. a damping hole; 48. a one-way valve; 9. a large cavity; 51. an anti-drop bolt; 52. an end cap; 53. a connecting seat; 54. an elastic pad; 55. the ball is compared with the inner ring of the bearing; 56. a second oil port; 57. a first guide sleeve; 58. an outer protective shell; 59. a cylinder barrel; 510. a second chamber; 511. a second guide sleeve; 512. a piston rod; 513. a first oil port; 514. a first chamber; 515. a piston; 516. a thin plate; 61. an outer protective shell; 62. an inner protective shell; 63. a cylinder barrel; 64. a piston rod; 65. a piston; 7. a cylinder stroke detection device (which can be a detection sensor); 71. a detection module; 72. a moving body; 81. a set screw; 82. a sensor wire outlet hole; 83. a retainer ring; 91. the small cavity is communicated with an oil way; 92. a plug (or filter).
Detailed Description
The contents of the present invention and the differences between the present invention and the prior art can be understood with reference to fig. 1 to 10 and the text. The invention will now be described in further detail, including the preferred embodiments, with reference to the accompanying drawings, in which some alternative embodiments of the invention are shown. It should be noted that: any technical features and any technical solutions in the present embodiment are one or more of various optional technical features or optional technical solutions, and for the sake of brevity, this document cannot exhaustively enumerate all the alternative technical features and alternative technical solutions of the present invention, and is also not convenient for each embodiment of the technical features to emphasize it as one of various optional embodiments, so those skilled in the art should know that: any technical means provided by the invention can be replaced or any two or more technical means or technical characteristics provided by the invention can be combined with each other to obtain a new technical scheme. Any technical features and any technical solutions in the present embodiment do not limit the scope of the present invention, and the scope of the present invention should include any alternative technical solutions that can be conceived by those skilled in the art without inventive efforts and new technical solutions that can be obtained by those skilled in the art by combining any two or more technical means or technical features provided by the present invention with each other.
The embodiment of the invention provides a suspension oil cylinder with strong adaptability to complex and severe working conditions and a crane provided with the suspension oil cylinder.
The technical solution provided by the present invention will be explained in more detail with reference to fig. 1 to 10.
Example 1:
as shown in fig. 6 to 7, the suspension cylinder provided in the embodiment of the present invention includes a cylinder 59, a piston rod 512, a cylinder stroke detection device 7, and a vibration damping support, wherein one of the cylinder 59 and the piston rod 512 can be elastically connected to an external connection body through the vibration damping support;
the cylinder stroke detection device 7 comprises a detection module 71 and a moving body 72, wherein the detection module 71 can send out a cylinder displacement detection signal corresponding to the position of the moving body 72 in real time in the relative movement process of the moving body 72 and the detection module 71;
one of the moving body 72 and the detection module 71 (which may be the detection module 71) is fixedly connected to the cylinder 59, and the other of the moving body 72 and the detection module 71 is fixedly connected to the piston rod 512.
In the invention, no matter how the moving body 72 (which can be a magnet) and the detection module 71 (which can be a sensor main body of a magnetostrictive displacement sensor) in the oil cylinder stroke detection device 7 move relatively, a gap always exists between the moving body 72 and the detection module 71, because a non-contact measurement method is adopted, friction and abrasion are not generated, the reliability and the stability are good, because the stroke of the piston rod 512 relative to the oil cylinder 59 can be detected in real time, and the stroke information can support an operator or a control system to control the crane (for example, the accurate leveling of the crane chassis is realized, and the suspension oil cylinder is properly adjusted according to the road condition reflected by the stroke information), so that the performance of the crane chassis provided with the suspension oil cylinder is improved, the capacity of adapting to complex and severe working conditions is stronger, and the problems of complex, severe working conditions and, The technical problem of poor adaptability to severe working conditions is solved, and the crane can bring better comfort, reliability and other experiences to a driver in the walking process.
In an alternative embodiment of any of the embodiments of the present invention, the cylinder stroke detection device 7 is a magnetostrictive displacement sensor (or a hysteresis displacement sensor), and the moving body 72 is a magnet. The oil cylinder stroke detection device 7 can detect the strokes of the piston rod 512 and the oil cylinder 59 by adopting a non-contact type measuring method under the condition of ensuring the detection precision, in particular to a magnetostrictive displacement sensor which can measure the actual position through a non-contact type position magnet, so that the device has no abrasion at all during working, the absolute working principle can ensure the reliable reading, the mechanical strain pulse can be triggered through the movement of the position magnet, and the running time of the ultrasonic wave can be accurately obtained and compiled into a standard electronic output signal.
As an alternative embodiment of any of the technical solutions of the present invention, the cylinder stroke detection device 7 is located inside the cylinder 59 and between the cylinder 59 and the piston rod 512. The oil cylinder stroke detection device 7 is placed in the suspension oil cylinder, so that the condition that the oil cylinder stroke detection device 7 is damaged by external collision can be avoided, and the working reliability of the oil cylinder stroke detection device 7 is improved.
As an optional implementation manner of any technical scheme of the invention, a first oil port and a second oil port are arranged on the outer surface of the cylinder 59, a first chamber and a second chamber are formed between the cylinder 59 and the piston rod 512, and hydraulic oil entering the first chamber from the first oil port can drive the piston rod 512 to extend out; the hydraulic oil entering the second chamber from the second oil port can drive the piston rod 512 to retract; the cylinder 59 is provided with a first mounting hole communicated with the first chamber, the piston rod 512 is provided with a second mounting hole communicated with the first chamber, the detection module 71 is fixed in the first mounting hole, and the moving body 72 is fixed in the second mounting hole. The design has the feasibility of processing, manufacturing and assembling.
As a preferable positioning method, in the present invention, the detection module or the movable body may be fixed by using a positioning screw, but the positioning screw may not be used.
As an optional embodiment of any technical solution of the present invention, the cylinder 59 is provided with a positioning screw hole communicated with the first mounting hole, and a positioning screw 81 in threaded connection with the screw hole abuts against the detection module 71 and locks the detection module 71 in the mounting chamber. By tightening the set screw 81, the detection module 71 can be locked in the mounting chamber by the abutting force of the set screw 81, and the detection module 71 can be taken out by loosening the set screw 81. As an optional embodiment of any technical scheme of the invention, the cylinder 59 is provided with a sensor outlet hole 82 communicated with the mounting chamber, and the depth direction of the sensor outlet hole 82 is consistent with the radial direction of the cylinder 59. The sensor outlet holes 82 may facilitate the exit of the lines. Of course, if a wireless signal transceiver electrically connected to the detection module 71 and outputting a cylinder displacement detection signal for the detection module is further disposed in the cylinder 59, the wire and sensor outlet may be omitted.
As an optional implementation manner of any one of the technical solutions of the present invention, the cylinder stroke detection device is a magnetostrictive displacement sensor, the detection module 71 includes a detection rod, the moving body 72 is a ring magnet, an oil chamber communicated with the second mounting hole is disposed in the piston rod 512, the detection rod penetrates through a center hole of the moving body 72 and is inserted into the oil chamber, and a gap exists between the detection rod and an inner wall of the center hole.
As an alternative embodiment of any of the embodiments of the present invention, a retaining ring 83 may be fixedly disposed in the second mounting hole (the retaining ring 83 and the second mounting hole are connected in an interference fit manner), the movable body 72 may be restricted in the second mounting hole by the retaining ring 83 being pressed against the movable body 72, and the detection rod may be inserted into the oil chamber through respective center holes of the retaining ring 83 and the movable body 72.
The oil chamber can prevent the detection rod from colliding with the piston rod 512, and provides a moving space for the relative movement of the detection rod and the annular magnet. The retainer ring 83 can limit, lock and protect the moving body 72.
As an optional embodiment of any technical solution of the present invention, the vibration damping mount includes a drop-proof body (which may be an end cover 52, and an elastic material layer may be disposed on or coated on a lower bottom surface or a side surface of the end cover 52, and the elastic material may be rubber), a connection seat 53, an elastic pad 54 (which may be a rubber pad, and may also be referred to as a flexible pad), and a spherical hinge bearing inner ring 55, wherein: the connecting seat 53 forms a ball pivot bearing outer race. The end of the piston rod 512 may be provided with a piston 515, for example the piston 515 may be provided at the end of the piston rod 512.
The connecting base 53, the elastic pad 54 and the spherical hinge bearing inner ring 55 are respectively provided with a connecting through hole. The anti-drop body is abutted against the part of the connecting seat 53 departing from the cylinder 59 or the piston rod 512, and the anti-drop body (which can be the end cover 52) is connected with one of the cylinder 59 and the piston rod 512 through a detachable connecting structure (which can be the anti-drop bolt 51).
There is a gap between the inner wall of the connecting through-hole on the connecting holder 53 and the spherical hinge bearing inner ring 55 or the detachable connecting structure in the radial direction of the connecting through-hole on the connecting holder 53, or there is a gap between the elastic pad 54 and the spherical hinge bearing inner ring 55 in the radial direction of the connecting through-hole on the connecting holder 53. The elastic pad 54 is interposed between a partial region of the connecting socket 53 and a partial region of the ball-and-socket bearing inner ring 55, and the elastic pad 54 is connected (may be bonded) to the partial region of the connecting socket 53 and the partial region of the ball-and-socket bearing inner ring 55, respectively.
The suspension oil cylinder provided by the embodiment of the invention is provided with the special vibration damping support which has the functions of vibration damping and buffering, so that the oil cylinder can swing at a certain free angle (in the preferred scheme, the rubber pad of the vibration damping support can be made of special rubber materials and has better vibration damping and buffering effects).
As an optional implementation mode of any technical scheme of the invention, the anti-falling body (which can be the end cover 52) is connected with the cylinder 59 through a detachable connecting structure, the piston rod 512 is also fixedly connected with an outer-layer protective shell 58, the outer-layer protective shell 58 is sleeved outside the cylinder 59, and the cylinder 59 can slide relative to the outer-layer protective shell 58.
The suspension cylinder is designed into a protective shell structure, and is connected with the axle to play a role in guiding and positioning, so that the structure of the independent suspension system can be simplified, and the spatial arrangement of other structures is facilitated. The internal structure of the oil cylinder can be protected from being influenced by external dirt and the like, and the side load resistance of the oil cylinder can be enhanced.
As an optional embodiment of any technical scheme of the invention, the anti-falling body (which can be the end cover 52) is connected with the cylinder 59 through a detachable connecting structure, a first guide sleeve 57 is arranged between the inner wall of the outer-layer protective shell 58 and the outer wall of the cylinder 59, the first guide sleeve 57 is fixedly connected with the outer-layer protective shell 58, and the first guide sleeve 57 is respectively abutted against the inner wall of the outer-layer protective shell 58 and the outer wall of the cylinder 59.
Second guide sleeves 511 are arranged between the inner wall of the outer-layer protective shell 58 and the outer wall of the cylinder 59 and between the inner wall of the cylinder 59 and the outer wall of the piston rod 512, the second guide sleeves 511 are fixedly connected with the cylinder 59, and the second guide sleeves 511 are respectively abutted to the outer wall of the piston rod 512 and the inner wall of the outer-layer protective shell 58.
As an optional embodiment of any technical scheme of the invention, the anti-drop body comprises an end cover 52, the end cover 52 is provided with a mounting hole, the detachable connecting structure is an anti-drop bolt 51, and a threaded part of the anti-drop bolt 51 penetrates through the mounting hole and is in threaded connection with a threaded hole on the cylinder 59.
As an alternative embodiment of any technical scheme of the invention, the ball-joint bearing inner ring 55 comprises a base part, a concave spigot arranged on the base part and a convex spigot fixedly connected with the base part or in an integral structure, and the connecting through hole on the ball-joint bearing inner ring 55 is formed by holes on the base part and the convex spigot together.
The male spigot is inserted into the connecting through hole on the connecting base 53, and a gap exists between the elastic pad 54 and the male spigot between the male spigot and the inner wall of the connecting through hole on the connecting base 53.
The location arch on the cylinder 59 inlays in the indent tang, is provided with the screw on the location arch.
As an optional embodiment of any technical scheme of the invention, an outer convex cambered surface is arranged on the base part around the outer convex spigot, an inner concave cambered surface is arranged on the inner side of the connecting seat 53, and two side surfaces of the elastic pad 54 are respectively bonded with the outer convex cambered surface and the inner concave cambered surface.
As an optional embodiment of any technical solution of the present invention, a first oil port 513 and a second oil port 56 are disposed on an outer surface of the piston rod 512 located outside the cylinder 59 or on an outer surface of the cylinder 59, and a first chamber 514 and a second chamber 510 are formed between the cylinder 59 and the piston rod 512 (the volume of the first chamber 514 may be larger than that of the second chamber 510, so the first chamber 514 may also be referred to as a large chamber, the first oil port 513 may also be referred to as a large chamber oil port, the second chamber 510 may also be referred to as a small chamber, and the second oil port 56 may also be referred to as a small chamber oil port).
Hydraulic oil entering the first chamber 514 from the first oil port 513 can drive the piston rod 512 to extend. Hydraulic oil entering the second chamber 510 from the second port 56 can drive the piston rod 512 to retract.
As an optional embodiment of any technical solution of the present invention, at least one damping hole (the damping hole may also be an oil guide hole for transmitting hydraulic oil) and/or at least one check valve is provided on an oil path (which may be isolated from the first chamber 514 by an oil pipe) between the second oil port 56 and the second chamber 510.
As an alternative embodiment of any one of the technical solutions of the present invention, a thin plate 516 is further fixedly connected to the cylinder 59, and the largest plane of the thin plate 516 is perpendicular to the axial direction of the cylinder 59. The sheet 516 cooperates with the corresponding structure of the frame to prevent the cylinder 59 from rotating, thereby preventing the corresponding pipeline from twisting and preventing the loosening of the anti-slip bolt 51.
Example 2:
as shown in fig. 8 and 9, this embodiment is basically the same as embodiment 1, and differs therefrom in that: in this embodiment, the anti-falling body (which may be the end cap 52) may be connected to the piston rod 64 through a detachable connection structure (which may be the same as or similar to the anti-falling bolt 51 shown in fig. 6), the piston rod 64 is fixedly connected to the inner protective shell 62, and the cylinder 63 is fixedly connected to the outer protective shell 61. The inner protective shell 62 is sleeved outside the cylinder 63, and the cylinder 63 is arranged between the inner protective shell 62 and the piston 65 at the tail end of the piston rod 64. The outer protective shell 61 is sleeved outside the inner protective shell 62, and the inner protective shell 62 can slide relative to the cylinder 63 and the outer protective shell 61.
The crane provided by the embodiment of the invention comprises a frame, an axle, a control system and a suspension oil cylinder provided by any technical scheme of the invention, wherein:
the external connecting body is one of a frame and an axle, the external connecting body is fixedly connected with the vibration damping support, and one of the cylinder barrel and the piston rod is elastically connected with the external connecting body through the vibration damping support;
the other of the frame and the axle is fixedly connected with the other of the cylinder and the piston rod;
the oil cylinder stroke detection device 7 is arranged in the suspension oil cylinder, the oil cylinder stroke detection device 7 can transmit the oil cylinder displacement detection signal to the control system, and the control system can receive the oil cylinder displacement detection signal and perform corresponding processing and can realize the displacement detection and stroke control functions of the suspension oil cylinder.
Compared with the mode that the cylinder barrel and the piston rod (or called two ends of the cylinder) of the suspension cylinder are hinged with the frame and the axle in the prior art, the mode that the cylinder barrel and the piston rod of the suspension cylinder are fixedly connected with the frame and the axle (for example, the mode that the cylinder barrel and the piston rod are connected with the frame and the axle through bolts fully utilizes the elastic action of the vibration reduction support, so that the suspension cylinder has certain free-angle swing, relieves lateral force and has certain guiding and positioning effects.
As an optional implementation mode of any technical scheme of the invention, one of the frame and the axle (which can be the frame) is fixedly connected with a connecting seat (which can be a flange structure) of the suspension oil cylinder.
The anti-falling body is connected with the cylinder barrel through a detachable connecting structure, and the other of the frame and the axle (which can be the axle) is fixedly connected with a piston rod of the suspension oil cylinder or a structural part (which can be an outer protective shell 58) fixedly connected with the piston rod of the suspension oil cylinder. Or, the anti-dropping body is connected with the piston rod through a detachable connecting structure (can be an anti-dropping bolt), and the other one of the frame and the axle (can be the axle) is fixedly connected with the cylinder barrel of the suspension oil cylinder or a structural member (can be an outer protective shell 61) fixedly connected with the piston rod of the suspension oil cylinder.
The connection mode has the advantages of simple and convenient connection.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (14)
1. A suspension oil cylinder is characterized by comprising a cylinder barrel, a piston rod, an oil cylinder stroke detection device and a vibration damping support, wherein one of the cylinder barrel and the piston rod is connected with the vibration damping support;
the oil cylinder stroke detection device comprises a detection module and a moving body, wherein the detection module can send out an oil cylinder displacement detection signal corresponding to the position of the moving body in real time in the relative movement process of the moving body and the detection module;
one of the moving body and the detection module is fixedly connected with the cylinder barrel, and the other of the moving body and the detection module is fixedly connected with the piston rod;
damping support includes anticreep body, connecting seat, cushion and ball pivot bearing inner race, wherein:
the connecting seat, the elastic cushion and the spherical hinge bearing inner ring are respectively provided with a connecting through hole; the anti-falling body is abutted against the part of the connecting seat departing from the cylinder barrel or the piston rod, and the anti-falling body is connected with one of the cylinder barrel and the piston rod through a detachable connecting structure;
in the radial direction of the connecting through hole on the connecting seat, a gap exists between the inner wall of the connecting through hole on the connecting seat and the inner ring of the spherical hinge bearing or the detachable connecting structure; and/or a gap exists between the elastic pad and the inner ring of the spherical hinge bearing in the radial direction of the connecting through hole on the connecting seat;
the elastic pad is arranged between the partial area of the connecting seat and the partial area of the inner ring of the spherical hinge bearing, and the elastic pad is respectively connected with the partial area of the connecting seat and the partial area of the inner ring of the spherical hinge bearing.
2. A suspension cylinder according to claim 1, characterized in that the cylinder stroke detection means is a magnetostrictive displacement sensor.
3. A suspension cylinder according to claim 1 or 2, characterized in that the cylinder stroke detection means is located inside the cylinder tube between the cylinder tube and the piston rod.
4. The suspension cylinder according to claim 2, wherein a first oil port and a second oil port are formed in the outer surface of the cylinder barrel, a first chamber and a second chamber are formed between the cylinder barrel and the piston rod, and the piston rod can be driven to extend out by hydraulic oil entering the first chamber from the first oil port; the hydraulic oil entering the second chamber from the second oil port can drive the piston rod to retract;
the cylinder barrel is provided with a first mounting hole communicated with the first chamber, the piston rod is provided with a second mounting hole communicated with the first chamber, the detection module is fixed in the first mounting hole, and the moving body is fixed in the second mounting hole.
5. The suspension cylinder according to claim 4, wherein the cylinder barrel is provided with a positioning screw hole communicated with the first mounting hole, and a positioning screw in threaded connection with the screw hole abuts against the detection module and locks the detection module in the first mounting hole.
6. The suspension cylinder according to claim 4, wherein the detection module comprises a detection rod, the moving body is a ring magnet, an oil chamber communicated with the second mounting hole is arranged in the piston rod, the detection rod penetrates through a central hole of the moving body and is inserted into the oil chamber, and a gap exists between the detection rod and the inner wall of the central hole.
7. The suspension cylinder according to claim 4, characterized in that at least one orifice and/or at least one check valve is arranged on the oil path between the second oil port and the second chamber.
8. The suspension cylinder according to claim 1, wherein the anti-drop body is connected with the cylinder barrel through the detachable connection structure, the piston rod is further fixedly connected with an outer protective shell, the outer protective shell is sleeved outside the cylinder barrel, and the cylinder barrel can slide relative to the outer protective shell; or,
the anti-falling body is connected with the piston rod through the detachable connecting structure, the piston rod is fixedly connected with an inner-layer protective shell, and the cylinder barrel is fixedly connected with an outer-layer protective shell; the inner layer protective shell is sleeved outside the cylinder barrel, and the cylinder barrel is arranged between the inner layer protective shell and the piston at the tail end of the piston rod; the outer protective shell is sleeved outside the inner protective shell, and the inner protective shell can slide relative to the cylinder barrel and the outer protective shell.
9. The suspension cylinder according to claim 8, wherein the anti-drop body is connected with the cylinder barrel through the detachable connection structure, a first guide sleeve is arranged between the inner wall of the outer protective shell and the outer wall of the cylinder barrel, the first guide sleeve is fixedly connected with the outer protective shell, and the first guide sleeve is respectively abutted against the inner wall of the outer protective shell and the outer wall of the cylinder barrel;
and second guide sleeves are arranged between the inner wall of the outer protective shell and the outer wall of the cylinder barrel and between the inner wall of the cylinder barrel and the outer wall of the piston rod, are fixedly connected with the cylinder barrel, and are respectively abutted against the outer wall of the piston rod and the inner wall of the outer protective shell.
10. The suspension cylinder according to claim 1, wherein the anti-drop body comprises an end cover, a mounting hole is formed in the end cover, the detachable connecting structure is an anti-drop bolt, and a threaded portion of the anti-drop bolt penetrates through the mounting hole and is in threaded connection with a threaded hole in the cylinder barrel.
11. The suspension cylinder according to claim 10, wherein the ball joint bearing inner ring comprises a base portion, a female spigot disposed on the base portion, and a male spigot fixedly connected to the base portion or integrally formed with the base portion, and the connecting through hole on the ball joint bearing inner ring is formed by holes on the base portion and the male spigot;
the convex spigot is inserted into the connecting through hole on the connecting seat, and a gap is formed between the elastic pad and the convex spigot between the convex spigot and the inner wall of the connecting through hole on the connecting seat;
the positioning bulge on the cylinder barrel is embedded in the concave spigot, and the screw hole is formed in the positioning bulge.
12. The suspension cylinder as claimed in claim 11, wherein the base portion around the male spigot is provided with a male arc surface, the inner side of the connecting seat is provided with a female arc surface, and two side surfaces of the resilient pad are bonded to at least the male arc surface and the female arc surface, respectively.
13. A suspension cylinder according to claim 1 or 2, characterized in that a thin plate is fixedly connected to the cylinder tube, and the largest plane of the thin plate is perpendicular to the axial direction of the cylinder tube.
14. A crane comprising a frame, an axle, a control system and a suspension cylinder according to any one of claims 1 to 13, wherein:
one of the frame and the axle is fixedly connected with the vibration reduction support, and is elastically connected with one of the cylinder barrel and the piston rod through the vibration reduction support;
the other of the frame and the axle is fixedly connected with the other of the cylinder barrel and the piston rod;
the suspension oil cylinder is internally provided with the oil cylinder stroke detection device, the oil cylinder stroke detection device can transmit the oil cylinder displacement detection signal to the control system, and the control system can receive the oil cylinder displacement detection signal and perform corresponding processing and can realize the displacement detection and stroke control functions of the suspension oil cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510145187.9A CN104832495B (en) | 2015-03-31 | 2015-03-31 | Hanging oil cylinder and crane |
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| CN201510145187.9A CN104832495B (en) | 2015-03-31 | 2015-03-31 | Hanging oil cylinder and crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018098660A1 (en) * | 2016-11-30 | 2018-06-07 | 徐州重型机械有限公司 | Wheeled chassis and crane |
| CN107268828B (en) * | 2017-07-19 | 2023-08-15 | 贵州富乐森装配式建筑工业有限公司 | Assembled building wall |
| CN107444520B (en) * | 2017-08-08 | 2023-03-21 | 东风小康汽车有限公司重庆分公司 | Vehicle chassis accessory mounting device |
| CN110905885A (en) * | 2019-12-16 | 2020-03-24 | 广东志成电液科技有限公司 | Inverted hydraulic cylinder with built-in displacement sensor and hydraulic mechanism |
| CN112343596B (en) * | 2020-07-29 | 2024-04-23 | 无锡华夏中矿机电科技有限公司 | Hydraulic guide device for tunneling, anchoring and protecting integrated machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6575484B2 (en) * | 2001-07-20 | 2003-06-10 | Husco International, Inc. | Dual mode regenerative suspension for an off-road vehicle |
| US7059238B2 (en) * | 2003-10-17 | 2006-06-13 | Clark Equipment Company | Method and apparatus for stroke position sensor for hydraulic cylinder |
| JP4733481B2 (en) * | 2005-09-09 | 2011-07-27 | カヤバ工業株式会社 | Cylinder device |
| CN102275481B (en) * | 2011-06-14 | 2013-06-19 | 三一汽车起重机械有限公司 | Oil-gas suspension mechanism and engineering vehicle with suspension mechanism |
| CN103042893B (en) * | 2012-12-27 | 2016-01-20 | 三一重工股份有限公司 | Hydro-pneumatic suspension system and engineering truck |
| JP5865876B2 (en) * | 2013-07-31 | 2016-02-17 | Ｋｙｂ株式会社 | Fluid pressure cylinder |
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Inventor after: Zhao Yufeng Inventor after: Zhao Ruixue Inventor after: Zhu Lei Inventor after: Liang Jingwen Inventor after: Wang Wei Inventor after: Li Shaofeng Inventor before: Zhao Yufeng Inventor before: Zhao Ruixue Inventor before: Zhu Lei Inventor before: Liang Jingwen Inventor before: Wang Wei Inventor before: Li Shaofeng |
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Address after: 221000 68 Gaoxin Road, Xuzhou economic and Technological Development Zone, Jiangsu Patentee after: Xuzhou Heavy Machinery Co., Ltd. Address before: No. 165, Tongshan Road, Xuzhou, Jiangsu Province Patentee before: Xuzhou Heavy Machinery Co., Ltd. |