CN116398498A - High-load in-cylinder self-locking hydraulic cylinder - Google Patents
High-load in-cylinder self-locking hydraulic cylinder Download PDFInfo
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- CN116398498A CN116398498A CN202310266218.0A CN202310266218A CN116398498A CN 116398498 A CN116398498 A CN 116398498A CN 202310266218 A CN202310266218 A CN 202310266218A CN 116398498 A CN116398498 A CN 116398498A
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- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 230000003068 static effect Effects 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 description 7
- 239000010720 hydraulic oil Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
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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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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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
- F15B15/26—Locking mechanisms
- F15B15/262—Locking mechanisms using friction, e.g. brake pads
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a high-load in-cylinder self-locking hydraulic cylinder in the field of hydraulic cylinders, which comprises a cylinder body and a cylinder rod and is characterized in that: a hollow inner cavity is formed in the cylinder rod, and a locking mechanism is arranged in the hollow inner cavity; the locking mechanism comprises a locking block capable of extruding the inner wall of the cylinder rod and a force amplifying mechanism, and the force amplifying mechanism is axially and relatively fixed with the cylinder body; the force amplifying mechanism can squeeze the locking block in any stroke of the cylinder rod and lock the cylinder rod; according to the invention, the radial static friction with the cylinder body is utilized to relieve the pressure from the axial direction in the second cavity, so that the sealing pressure of the liquid injection hole is reduced, and the difficulty of generating large static friction between the locking block and the cylinder body can be effectively reduced through the force amplifying mechanism.
Description
Technical Field
The invention belongs to the field of hydraulic cylinders, and particularly relates to a high-load in-cylinder self-locking hydraulic cylinder.
Background
The hydraulic cylinder is a hydraulic executive component with wide application, and can see the figure and the shadow in various industries of society. Because of the leakage phenomenon (instantaneous pressure change surge of a liquid injection hole caused by equipment vibration) which is difficult to avoid by a hydraulic system, the piston rod has fine displacement change, and finally, the hydraulic cylinder is difficult to ensure that the position of the piston is unchanged for a long time under the action of load. With the progress of technology, the oil cylinder is increasingly used in occasions with higher precision, and the displacement of the oil cylinder cannot reach the displacement required by precision operation due to the leakage phenomenon in the oil cylinder. At present, a mechanical self-locking mechanism is added to the hydraulic oil cylinder to enhance the locking reliability of the hydraulic oil cylinder, but most of the existing mechanical self-locking mechanisms only can lock when the piston rod is in a fully extended or retracted state, and can not lock any position of the hydraulic oil cylinder in a full stroke. In order to solve the above problems, it is necessary to improve the structure of the existing self-locking hydraulic cylinder to increase the reliability, stability and accuracy of self-locking.
Disclosure of Invention
The invention aims to provide a high-load in-cylinder self-locking hydraulic cylinder so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a self-locking hydraulic cylinder in high load jar, includes cylinder body and jar pole, its characterized in that: a hollow inner cavity is formed in the cylinder rod, and a locking mechanism is arranged in the hollow inner cavity;
the locking mechanism comprises a locking block capable of extruding the inner wall of the cylinder rod and a force amplifying mechanism, and the force amplifying mechanism is axially and relatively fixed with the cylinder body; the force amplifying mechanism can squeeze the locking block and lock the cylinder rod in any stroke of the cylinder rod.
As a further scheme of the invention: the force amplifying mechanism comprises a base fixedly connected with the cylinder body, a locking cylinder is fixedly arranged at the upper part of the base, a mounting shaft is fixedly arranged in a cavity between the base and the locking cylinder, a locking block is rotatably arranged on the mounting shaft, and the locking block can be pressed against the inner wall of the cylinder rod when rotating; the base is also provided with a driving mechanism for driving the locking block to rotate.
As a further scheme of the invention: the driving mechanism comprises a piston which is slidably arranged in the inner cavity of the base, the piston is connected with the inner wall of the upper side of the base through a spring, a top shaft which is coaxial with the spring and can penetrate through the upper side of the base is fixedly arranged on the upper side of the piston, and the upper end of the top shaft is inserted into a chute arranged at the lower end of the locking block through a pin shaft; a connecting rod is fixedly arranged on the inner side of the locking block, and a locking groove is formed in the end part of the connecting rod; when the locking block rotates, the locking groove can limit the locking block, so that the end part of the chute of the locking block cannot contact with the pin shaft of the top shaft; the locking block is freely arranged in a cavity between the base and the locking cylinder in a clearance fit manner; the lower extreme of base is offered and is annotated the liquid hole with external intercommunication.
As a further scheme of the invention: the locking block is also provided with a pre-tightening mechanism; the pre-tightening mechanism comprises a support column which is hinged to two wings of the locking block; the other end of the support column can change the axial relative position of the support column and the connecting rod through the fine adjustment assembly, so that the two wings of the locking block are deformed in an outward stretching mode.
As a further scheme of the invention: the fine adjustment assembly comprises a thread sleeve in threaded connection with a thread section of the connecting rod, a mounting plate is contacted with the end face of the thread sleeve, which is close to the extrusion speed, and the mounting plate is sleeved with the connecting rod; the other end of the support column is hinged to the end face of the mounting plate; the fine adjustment assembly further comprises a driving unit for driving the threaded sleeve to rotate.
As a further scheme of the invention: the screw teeth of the screw sleeve are low-pitch triangle screw teeth.
As a further scheme of the invention: the driving unit is a driving motor capable of driving the threaded sleeve to rotate.
As a further scheme of the invention: the drive unit is a self-driven unit without an external power source, and comprises: a driving part for driving the thread bush to lock and a reset part for resetting the thread bush.
As a further scheme of the invention: the driving part comprises a pushing piece fixedly arranged on the side edge of the thread bush and a lifting rod fixedly arranged at the upper end of the piston and penetrating through the base, and when the lifting rod ascends, the thread bush can be driven to rotate in a mode of driving the pushing piece to move upwards.
As a further scheme of the invention: the reset component comprises a first torsion spring connected between the threaded sleeve and the connecting rod and a pressing piece rotationally arranged on the outer wall of the mounting table through a second torsion spring, wherein the pressing piece can press the threaded sleeve when being free and overcomes the elasticity of the first torsion spring by utilizing friction force; the piston is also fixedly provided with a deflector rod penetrating through the base, the upper end of the deflector rod is provided with a deflector plate I in an angle-limited rotation manner, the outer side of a rotating shaft of the pressing sheet is provided with a deflector plate II, and the deflector plate II can be driven to rotate when the deflector plate I is upwards, so that the pressing sheet is temporarily loosened, and the resetting of a pair of thread sleeves of the torsion spring is realized; when the plectrum is in a downward movement, the plectrum can jump over the plectrum II by autorotation, and reset under the action of gravity after the plectrum II is jumped over.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can realize the purpose of self-locking the hydraulic cylinder at any time and any length by utilizing the simple rotating locking block, and more importantly, the technical scheme has the advantages of simple characteristics, extremely simple operation, capability of greatly reducing the operation requirement, capability of greatly reducing the working failure rate of the hydraulic cylinder because the locking of the device is controlled by a spring basically and does not need a continuous power source, and wider application range and capability of being suitable for a more severe environment because the continuous working state of equipment is electroless.
2. According to the invention, the driving parts of the reset assembly are arranged on the piston, so that the number of the driving parts in the hydraulic cylinder can be reduced, and the operation is convenient. More important is: according to the invention, the close matching of the reset assembly and the driving part realizes the calibration of the locking block before each deformation, and then a worker can control the position of the highest point of the piston by controlling the injection amount of initial liquid in the hydraulic cavity according to the actual working condition, so as to control the rotation angle of the threaded sleeve, thereby controlling the pretightening force of the locking block. This can guarantee that the latch segment always can produce suitable deformation and face different operating modes, can improve the working life of latch segment to control extremely simply.
Drawings
FIG. 1 is a schematic diagram of the front side structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic view of the enlarged partial structure of FIG. 2 according to the present invention;
FIG. 4 is a schematic illustration of the main cross-section of the connecting rod of the present invention;
FIG. 5 is a schematic view of the sectional structure of the portion A- -A of FIG. 2 according to the present invention;
FIG. 6 is an enlarged schematic view of the portion A of FIG. 5 according to the present invention;
FIG. 7 is a schematic view of a cross-sectional structure of the portion B- -B of FIG. 2 according to the present invention;
FIG. 8 is a schematic view of the enlarged partial structure of FIG. 7 according to the present invention;
FIG. 9 is a schematic diagram of the principle of pretensioning of the lock block of the present invention;
FIG. 10 is a schematic view of an axial cross-section of the present invention;
fig. 11 is an enlarged view of the B part of fig. 10 according to the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1-cylinder, 1-1-first cavity, 1-2-second cavity, 1-3-closing cap, 1-4-set screw, 1-5-magnetic depth finding component, 1-6-guide holder, 2-cylinder rod, 2-1-hollow inner cavity, 3-mount, 4-base, 4-1-hydraulic cavity, 4-2-mount cavity, 5-piston, 5-1-lift rod, 5-2-top shaft, 5-3-deflector rod, 5-3-1-deflector plate one, 6-spring, 7-locking cylinder, 7-1-connecting block, 8-locking block, 9-1-chute, 10-mount shaft, 11-connecting rod, 11-1-locking groove, 11-2-threaded section, 11-3-mount table, 11-3-1-press plate, 11-3-2-deflector plate two, 12-threaded sleeve, 12-1-push plate, 13-mount plate, 14-support column.
Detailed Description
Referring to fig. 1 to 11, the present invention provides a technical solution: it should be noted that: the actual gap is not shown in the drawings of the specification of the present invention, and the drawings of the specification are for the sake of clarity of the reader to see the installation position of the components, such as the gap between the upper and lower sides of the locking block 88 and the locking cylinder 7 and the base 4 in fig. 2, and in actual production, the gap is far smaller than that shown in the drawings, and the typical distance is below 0.05 mm.
The utility model provides a self-locking hydraulic cylinder in high load jar, includes cylinder body 1 and jar pole 2, its characterized in that: a hollow inner cavity 2-1 is formed in the cylinder rod 2, and a locking mechanism is arranged in the hollow inner cavity 2-1;
the locking mechanism comprises a locking block 8 capable of extruding the inner wall of the cylinder rod 2 and a force amplifying mechanism, and the force amplifying mechanism is axially and relatively fixed with the cylinder body 1; the force amplifying mechanism can squeeze the locking block 8 and lock the cylinder rod 2 in any stroke of the cylinder rod 2.
The working principle of the traditional hydraulic cylinder is briefly described as follows:
as shown in fig. 2: the shortening or the extension of the cylinder rod 2 is realized by injecting hydraulic oil into the first cavity 1-1 or the second cavity 1-2, and the circumferential fixation of the cylinder rod 2 and the cylinder body 1 is realized by matching the set screw 1-4 with a chute on the side surface of the cylinder rod 2; the telescoping amount of the cylinder rod 2 is probed through the magnetic depth probing assembly 1-5, and meanwhile, leather cups are arranged between the matched parts which relatively slide in the cavity to realize the relative sealing between the parts; the sealing and guiding of the cylinder body 1 are realized through the sealing cover 1-3 and the guide seat 1-6, and the cylinder body 1 is installed at a place where the cylinder body needs to be used by utilizing the installation seat 3, which belong to the prior art and are not repeated.
When in operation, the device comprises: when the hydraulic cylinder works, in any stroke of the cylinder rod 2, the driving force amplifying mechanism acts on the locking block 8 to enable the locking block 8 to be attached to and tightly pressed against the inner wall of the cylinder rod 2, so that great static friction is generated between the locking block 8 and the cylinder rod 2, a great amount of axial pressure can be resisted, the pressure of a liquid injection hole part of the cylinder body 1 is further reduced, and the leakage is reduced.
According to the invention, the radial static friction with the cylinder body 1 is utilized to relieve the pressure from the axial direction in the second cavity 1-2, the sealing pressure of the liquid injection hole is reduced, and secondly, the difficulty of generating large static friction between the locking block 8 and the cylinder body 1 can be effectively reduced through the force amplifying mechanism.
As a further scheme of the invention: the force amplifying mechanism comprises a base 4 fixedly connected with a cylinder body 1, a locking cylinder 7 is fixedly arranged at the upper part of the base 4 (which can be fixedly connected through a connecting block 7-1 as shown in the figure), a mounting shaft 10 is fixedly arranged in a cavity between the base 4 and the locking cylinder 7, a locking block 9 is rotatably arranged on the mounting shaft 10, and the locking block 8 can be pressed against the inner wall of a cylinder rod 2 when the locking block 9 rotates; the base 4 is also provided with a driving mechanism for driving the locking block 9 to rotate.
Since the radial dimension of the cylinder rod 2 is generally much smaller than the axial dimension, the difficulty in manufacturing and mounting can be reduced by switching the power direction providing the radial pressure to the axial direction by the rotation of the lock block 9.
As a further scheme of the invention: the driving mechanism comprises a piston 5 which is slidably arranged in an inner cavity of the base 4, the piston 5 is connected with the inner wall of the upper side of the base 4 through a spring 6, a top shaft 5-2 which is coaxial with the spring 6 and can penetrate through the upper side of the base 4 is fixedly arranged on the upper side of the piston 5, and the upper end of the top shaft 5-2 is inserted into a chute 9-1 arranged at the lower end of a locking block 9 through a pin shaft; a connecting rod 11 is fixedly arranged on the inner side of the locking block 8, and a locking groove 11-1 is formed in the end part of the connecting rod 11; when the locking block 9 rotates, the locking groove 11-1 can limit the locking block 9, so that the end part of the chute 9-1 of the locking block 9 cannot be contacted with the pin shaft of the top shaft 5-2; the locking block 8 is freely arranged in a cavity between the base 4 and the locking cylinder 7 in a clearance fit manner; the lower extreme of base 4 has seted up annotates the liquid hole with external intercommunication.
When in operation, the device comprises: referring to fig. 2-3, upon relaxation: the hydraulic cavity 4-1 (the piston 5 divides the inside of the base into two cavities, namely the hydraulic cavity 4-1 and the mounting cavity 4-2), liquid is injected into the base, the piston 5 moves upwards against the elastic force of the spring 6 (preferably the heavy-load spring 6), so that the top shaft 5-2 moves upwards and drives the locking block 9 to rotate (the rotation direction in the figure is anticlockwise), when the locking block 9 rotates, the connecting rods 11 on two sides are not in a top-pressed state any more, thereby realizing that the locking block 8 does not press the inner wall of the cylinder rod 2 any more, namely the cylinder rod 2 is released, the working height of the cylinder rod 2 can be adjusted at the moment, and when the cylinder rod 2 is located at any height, locking is needed. The compacting process comprises the following steps: directly discharge the liquid in the hydraulic chamber 4-1, the piston 5 can move downwards under the pressure of the spring 6, and the locking block 9 rotates under the action of the top shaft 5-2 and the chute 9-1, and the connecting rod 11 is extruded outwards, so that the locking block 8 presses the inner wall of the cylinder rod 2.
The principle of force amplification is as follows: the product of F (elastic force of the spring 6) and L (eccentric distance of the pin shaft relative to the mounting shaft 10) is equal to the torque provided by the top shaft 5-2 to the locking block 9, which is equal to the product of F1 (transverse pressure of the locking block 8) and L1 (eccentric distance of contact points of two wings of the locking block 9 and the locking groove 11-1 relative to the mounting shaft 10), wherein the size of L1 is mainly related to the included angle of the upper side of the locking block 9 relative to the horizontal line to a large extent, namely L is determined, and the magnification of force can be controlled by controlling the included angle of the upper side of the locking block 9 relative to the horizontal line in the working state.
In the invention, the force can be amplified at any time by utilizing the simply rotating locking block 9, the aim of self-locking the hydraulic cylinder at any time at any length is realized, more importantly, the technical scheme has the advantages of simple characteristics, extremely simple operation and capability of greatly reducing the operation requirement, meanwhile, as the locking of the device is basically controlled by the spring 6, the power source does not need to continuously work, the working failure rate of the hydraulic cylinder can be greatly reduced, and secondly, as the equipment is electroless in the continuous working state, the application range is wider, and the device can be suitable for a more severe environment.
As shown in fig. 5 and fig. 9, the scheme can realize self-locking at any time, and the friction contact surface is a smooth surface during self-locking at any time, so that in actual work, the static friction force is expected to be increased in a mode of increasing the contact surface, and particularly when the hydraulic oil cylinder is in a high-load working condition, a stable large contact surface is more needed; however, in actual operation, the contact surface of a large area is not necessarily stable, because the number of supporting points cannot be increased at any time, and even if the reinforcing rib is provided on the supporting body (the connecting rod 11), such a problem cannot be solved, because the reinforcing rib is stationary, and the edge force strengthened by the reinforcing rib is weaker than the middle part, and the actual supporting strong point is only the connecting portion position of the supporting body. To solve this problem:
as a further scheme of the invention: the locking block 8 is also provided with a pre-tightening mechanism; the pre-tightening mechanism comprises a support column 14, and the support column 14 is hinged to two wings of the locking block 8; the other end of the supporting column 14 can change the axial relative position of the supporting column and the connecting rod 11 through a fine adjustment assembly, so that the two wings of the locking block 8 are slightly deformed in an outward stretching manner.
When in operation, the device comprises: referring to fig. 9, in general, the curvature of the contour of the locking block 8 is equal to the curvature of the inner wall of the cylinder rod 2, but the stress of the two wings of the locking block 8 is obviously smaller than that of the middle position, and the technical concept of the scheme is as follows: the support column 14 is adjusted, and the support column 14 is displaced relative to the connecting rod 11, so that the two wings of the locking block 8 are expanded and deformed d1-d2, when the connecting rod 11 moves rightwards by a distance d, the two wings of the locking block 8 are contacted with the cylinder rod 2 first and are elastically deformed, and then the middle part of the locking block 8 is contacted with the cylinder rod 2 and is extruded, so that a plurality of strong supporting points in the circumferential direction are formed. To overcome the above problems.
As a further scheme of the invention: the fine adjustment assembly comprises a thread sleeve 12 which is in threaded connection with a thread section 11-2 of the connecting rod 11, the thread sleeve 12 is contacted with a mounting plate 13 on the end face close to the extrusion speed, and the mounting plate 13 is sleeved with the connecting rod 11; the other end of the support column 14 is hinged on the end face of the mounting plate 13; the fine adjustment assembly further comprises a drive unit for driving the threaded sleeve 12 in rotation.
As a further scheme of the invention: the reason for the displacement of the screw-driven support column 14 is that: the thread can control the fine adjustment of the axial displacement, and secondly has self-locking property, and the thread saves labor when converting the axial displacement into the axial displacement.
As a further scheme of the invention: the thread of the thread sleeve 12 is a low pitch triangle thread (the triangle thread can be self-locking).
As a further scheme of the invention: the driving unit is a driving motor capable of driving the threaded sleeve 12 to rotate. The rotation of the threaded sleeve 12 is controlled by utilizing the single reverse rotation of the motor, so that the characteristics are simple, and the parts are fewer and convenient to install.
As a further scheme of the invention: the drive unit is a self-driven unit without an external power source, and comprises: a driving part for driving the locking of the thread bush 12 and a resetting part for resetting the thread bush 12;
as a further scheme of the invention: the driving part comprises a pushing piece 12-1 fixedly arranged on the side edge of the threaded sleeve 12 and a lifting rod 5-1 fixedly arranged at the upper end of the piston 5 and penetrating through the base 4, and when the lifting rod 5-1 ascends, the threaded sleeve 12 can be driven to rotate in a mode of driving the pushing piece 12-1 to move upwards.
As a further scheme of the invention: the reset component comprises a first torsion spring (not shown in the figure) connected between the threaded sleeve 12 and the connecting rod 11, and a pressing piece 11-3-1 which is arranged on the outer wall of the mounting table 11-3 through rotation of the second torsion spring, wherein the pressing piece 11-3-1 can press the threaded sleeve 12 when being free, and overcomes the elasticity of the first torsion spring by utilizing friction force; the piston 5 is also fixedly provided with a shifting lever 5-3 penetrating through the base 4, the upper end of the shifting lever 5-3 is provided with a shifting piece I5-3-1 in a limited angle rotation manner (the limited angle can be realized through the contacted inclined plane outline, the main purpose is to prevent the shifting piece I5-3-1 from being completely vertical), the outer side of a rotating shaft of the pressing piece 11-3-1 is provided with a shifting piece II 11-3-2, and the shifting piece II 11-3-2 can be driven to rotate when the shifting piece I5-3-1 ascends, so that the pressing piece 11-3-1 is temporarily loosened, and the reset of a pair of thread sleeves 12 of the torsion spring is realized; when the first pulling piece 5-3-1 descends, the second pulling piece 11-3-2 can be automatically jumped, and the second pulling piece 11-3-2 is jumped and then reset under the action of gravity.
When in operation, the device comprises: referring to fig. 7-8, as the piston 5 moves upward: firstly, the deflector rod 5-3 moves upwards, and the deflector piece I5-3-1 triggers the deflector piece II 11-3-2 to rotate clockwise, so that the press piece 11-3-1 loosens the compression on the edge of the thread bush 12, and then the thread bush 12 rotates and resets under the action of the torsion spring I. Then the deflector rod 5-3 continues to move upwards, the deflector piece I5-3-1 jumps over the deflector piece II 11-3-2, the deflector piece II 11-3-2 resets under the action of the torsion spring II, and the edge of the threaded sleeve 12 is compressed again (the friction generated by the compressing force only needs to be larger than the elastic force of the torsion spring I), and the process is calibration or zero setting; then, the piston 5 continues to move upwards, the lifting rod 5-1 forcedly drives the threaded sleeve 12 to rotate clockwise against the friction of the pressing sheet 11-3-1 through the pushing sheet 12-1, so that the position of the supporting column 14 is pre-adjusted, the deformation of two wings of the locking block 8 is adjusted, when the locking is needed, the piston 5 descends, the lifting rod 5-1 leaves the pushing sheet 12-1, the pushing sheet 12-1 is pressed by the pressing sheet 11-3-1 and cannot reset, and meanwhile, the first pulling sheet 5-3-1 can avoid the second pulling sheet 11-3-2 when moving downwards, so that the locking block 8 keeps deformed and pressed on the inner wall of the cylinder rod 2.
According to the invention, the driving parts of the reset assembly are arranged on the piston 5, so that the number of the driving parts in the hydraulic cylinder can be reduced, and the operation is convenient. More important is: the close matching of the reset component and the driving component realizes the calibration of the locking block 8 before each deformation, and then a worker can control the highest point position of the piston 5 by controlling the injection amount of initial liquid in the hydraulic cavity 4-1 according to the actual working condition, thereby controlling the rotation angle of the thread bush 12 and further controlling the pretightening force of the locking block 8. This ensures that the locking bar 8 always deforms appropriately to face different conditions, which increases the working life of the locking bar 8 and is easy to handle and control.
Claims (10)
1. The utility model provides a self-locking hydraulic cylinder in high load jar, includes cylinder body and jar pole, its characterized in that: a hollow inner cavity is formed in the cylinder rod, and a locking mechanism is arranged in the hollow inner cavity;
the locking mechanism comprises a locking block capable of extruding the inner wall of the cylinder rod and a force amplifying mechanism, and the force amplifying mechanism is axially and relatively fixed with the cylinder body; the force amplifying mechanism can squeeze the locking block and lock the cylinder rod in any stroke of the cylinder rod.
2. The high load in-cylinder self-locking hydraulic cylinder according to claim 1, wherein: the force amplifying mechanism comprises a base fixedly connected with the cylinder body, a locking cylinder is fixedly arranged at the upper part of the base, a mounting shaft is fixedly arranged in a cavity between the base and the locking cylinder, a locking block is rotatably arranged on the mounting shaft, and the locking block can be pressed against the inner wall of the cylinder rod when rotating; the base is also provided with a driving mechanism for driving the locking block to rotate.
3. The high load in-cylinder self-locking hydraulic cylinder according to claim 2, wherein: the driving mechanism comprises a piston which is slidably arranged in the inner cavity of the base, the piston is connected with the inner wall of the upper side of the base through a spring, a top shaft which is coaxial with the spring and can penetrate through the upper side of the base is fixedly arranged on the upper side of the piston, and the upper end of the top shaft is inserted into a chute arranged at the lower end of the locking block through a pin shaft; a connecting rod is fixedly arranged on the inner side of the locking block, and a locking groove is formed in the end part of the connecting rod; when the locking block rotates, the locking groove can limit the locking block, so that the end part of the chute of the locking block cannot contact with the pin shaft of the top shaft; the locking block is freely arranged in a cavity between the base and the locking cylinder in a clearance fit manner; the lower extreme of base is offered and is annotated the liquid hole with external intercommunication.
4. The high load in-cylinder self-locking hydraulic cylinder as claimed in claim 3, wherein: the locking block is also provided with a pre-tightening mechanism; the pre-tightening mechanism comprises a support column which is hinged to two wings of the locking block; the other end of the support column can change the axial relative position of the support column and the connecting rod through the fine adjustment assembly, so that the two wings of the locking block are deformed in an outward stretching mode.
5. The high load in-cylinder self-locking hydraulic cylinder as claimed in claim 4, wherein: the fine adjustment assembly comprises a thread sleeve in threaded connection with a thread section of the connecting rod, a mounting plate is contacted with the end face of the thread sleeve, which is close to the extrusion speed, and the mounting plate is sleeved with the connecting rod; the other end of the support column is hinged to the end face of the mounting plate; the fine adjustment assembly further comprises a driving unit for driving the threaded sleeve to rotate.
6. The high load in-cylinder self-locking hydraulic cylinder as claimed in claim 5, wherein: the screw teeth of the screw sleeve are low-pitch triangle screw teeth.
7. The high load in-cylinder self-locking hydraulic cylinder as claimed in claim 5, wherein: the driving unit is a driving motor capable of driving the threaded sleeve to rotate.
8. The high load in-cylinder self-locking hydraulic cylinder as claimed in claim 5, wherein: the drive unit is a self-driven unit without an external power source, and comprises: a driving part for driving the thread bush to lock and a reset part for resetting the thread bush.
9. The high load in-cylinder self-locking hydraulic cylinder as claimed in claim 8, wherein: the driving part comprises a pushing piece fixedly arranged on the side edge of the thread bush and a lifting rod fixedly arranged at the upper end of the piston and penetrating through the base, and when the lifting rod ascends, the thread bush can be driven to rotate in a mode of driving the pushing piece to move upwards.
10. The high load in-cylinder self-locking hydraulic cylinder as claimed in claim 8, wherein: the reset component comprises a first torsion spring connected between the threaded sleeve and the connecting rod and a pressing piece rotationally arranged on the outer wall of the mounting table through a second torsion spring, wherein the pressing piece can press the threaded sleeve when being free and overcomes the elasticity of the first torsion spring by utilizing friction force; the piston is also fixedly provided with a deflector rod penetrating through the base, the upper end of the deflector rod is provided with a deflector plate I in an angle-limited rotation manner, the outer side of a rotating shaft of the pressing sheet is provided with a deflector plate II, and the deflector plate II can be driven to rotate when the deflector plate I is upwards, so that the pressing sheet is temporarily loosened, and the resetting of a pair of thread sleeves of the torsion spring is realized; when the plectrum is in a downward movement, the plectrum can jump over the plectrum II by autorotation, and reset under the action of gravity after the plectrum II is jumped over.
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| CN202310266218.0A CN116398498B (en) | 2023-03-20 | 2023-03-20 | High-load in-cylinder self-locking hydraulic cylinder |
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| CN202310266218.0A CN116398498B (en) | 2023-03-20 | 2023-03-20 | High-load in-cylinder self-locking hydraulic cylinder |
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| CN116398498B CN116398498B (en) | 2024-05-14 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3101283A1 (en) * | 2015-06-03 | 2016-12-07 | Neumeister Hydraulik GmbH | Double acting locking cylinder and method for operating a double acting locking cylinder |
| CN209100393U (en) * | 2018-09-30 | 2019-07-12 | 上海东机液压工程有限公司 | A kind of hydraulic cylinder with self-locking function |
| CN210919633U (en) * | 2019-11-13 | 2020-07-03 | 东莞市海晟智能科技有限公司 | Flexible self-locking air cylinder |
| CN112576571A (en) * | 2020-12-08 | 2021-03-30 | 葛玉珍 | Oil cylinder |
-
2023
- 2023-03-20 CN CN202310266218.0A patent/CN116398498B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3101283A1 (en) * | 2015-06-03 | 2016-12-07 | Neumeister Hydraulik GmbH | Double acting locking cylinder and method for operating a double acting locking cylinder |
| CN209100393U (en) * | 2018-09-30 | 2019-07-12 | 上海东机液压工程有限公司 | A kind of hydraulic cylinder with self-locking function |
| CN210919633U (en) * | 2019-11-13 | 2020-07-03 | 东莞市海晟智能科技有限公司 | Flexible self-locking air cylinder |
| CN112576571A (en) * | 2020-12-08 | 2021-03-30 | 葛玉珍 | Oil cylinder |
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| CN116398498B (en) | 2024-05-14 |
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