CN112594250A - Self-locking hydraulic cylinder - Google Patents
Self-locking hydraulic cylinder Download PDFInfo
- Publication number
- CN112594250A CN112594250A CN202011594015.7A CN202011594015A CN112594250A CN 112594250 A CN112594250 A CN 112594250A CN 202011594015 A CN202011594015 A CN 202011594015A CN 112594250 A CN112594250 A CN 112594250A
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- Prior art keywords
- locking
- self
- rod
- piston
- end cover
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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
- F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
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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
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
Abstract
The invention relates to a self-locking hydraulic cylinder which comprises a cylinder body, a left end cover, a right end cover, a limiting rod, a piston body, a locking assembly and a self-locking rod, wherein the left end cover is arranged on the cylinder body; the cylinder body is cylindrical, a left end cover is fixedly arranged at one end of the cylinder body, a right end cover is fixedly arranged at the other end of the cylinder body, a limiting rod is arranged at an eccentric position between the left end cover and the right end cover, a piston body is connected in the cylinder body in a sliding mode along the horizontal direction, and the piston body is connected with the limiting rod in a sliding mode; one end of the piston body, which is opposite to the left end cover, extends leftwards to form a piston rod extending out of the left end cover; a rod cavity is formed between the piston body and the left end cover in the cylinder body, and a rodless cavity is formed between the piston body and the right end cover; the side surface of the left end cover is provided with a port B communicated with the rod cavity, and the side surface of the right end cover is provided with a port A communicated with the rodless cavity; a first mounting cavity is formed in the end face, opposite to the right end cover, of the piston body, and a locking assembly is arranged in the first mounting cavity; a cavity is arranged in the right end cover, a self-locking rod matched with the locking assembly is arranged in the cavity, the self-locking rod is fixedly connected with the right end cover, and the axis of the self-locking rod is vertical to the axis of the piston body; the hydraulic cylinder does not need to be provided with a hydraulic control one-way valve, simplifies an oil way, is reliable in locking due to the adoption of mechanical locking, and is simple in structure and convenient to manufacture.
Description
Technical Field
The invention belongs to the field of hydraulic cylinders, and particularly relates to a self-locking hydraulic cylinder.
Background
The self-locking hydraulic cylinder has wide requirements in the engineering field, for example, in the mechanical field of a plurality of lifting equipment such as metallurgy, coal mines, engineering machinery, sanitation trucks and the like, the hydraulic cylinder needs to be locked in order to prevent a workpiece from being displaced under the action of external force or self weight (the hydraulic cylinder is vertically placed) when the workpiece stops working.
At present, the hydraulic cylinder is locked mainly by means of blocking pressure oil, leakage is easy to occur, negative pressure effect and soft leg phenomenon occur, and although a plurality of improved products exist, the problems are not solved fundamentally. When the hydraulic lock is kept at a certain position for a long time, the precision often cannot meet the requirement due to the problems of pressure oil leakage and the like, and the precision and the reliability cannot be guaranteed when an oil way fails; the hydraulic lock often all needs a plurality of auxiliary component cooperations such as check valve, switching-over valve to realize the locking return circuit, and the use of these components makes whole device occupation space big, and simultaneously, the oil circuit increases and takes place to leak easily, causes maintenance and use inconvenience.
Disclosure of Invention
The invention aims to provide a hydraulic cylinder which is simple in structure and can realize self-locking of the hydraulic cylinder without a hydraulic control one-way valve.
In order to achieve the purpose, the invention provides the following technical scheme, which comprises a cylinder body, a left end cover, a right end cover, a limiting rod, a piston body, a locking assembly and a self-locking rod; the cylinder body is cylindrical, a left end cover is fixedly arranged at one end of the cylinder body, a right end cover is fixedly arranged at the other end of the cylinder body, a limiting rod is arranged at an eccentric position between the left end cover and the right end cover, a piston body is connected in the cylinder body in a sliding mode along the horizontal direction, and the piston body is connected with the limiting rod in a sliding mode; one end of the piston body, which is opposite to the left end cover, extends leftwards to form a piston rod extending out of the left end cover; a rod cavity is formed between the piston body and the left end cover in the cylinder body, and a rodless cavity is formed between the piston body and the right end cover; the side surface of the left end cover is provided with a port B communicated with the rod cavity, and the side surface of the right end cover is provided with a port A communicated with the rodless cavity; a first mounting cavity is formed in the end face, opposite to the right end cover, of the piston body, and a locking assembly is arranged in the first mounting cavity; a cavity is arranged in the right end cover, a self-locking rod matched with the locking assembly is arranged in the cavity, the self-locking rod is fixedly connected with the right end cover, and the axis of the self-locking rod is vertical to the axis of the piston body; when the liquid is fed from the opening B and returned from the opening A, the piston body drives the piston rod to move rightwards to contract, and when the piston body drives the piston rod to completely contract, the locking assembly is locked on the self-locking rod; when the liquid is fed from the opening A and returned from the opening B, the locking assembly is unlocked, and the piston body drives the piston rod to move leftwards and extend out.
Preferably, the locking assembly comprises a self-locking sleeve, a driving block, a self-locking shaft rod and a self-locking piston; the self-locking sleeve is fixedly arranged in the first mounting cavity, a first through hole is formed in the right end face of the self-locking sleeve in a penetrating mode, a first key groove is formed in the first through hole, and a second through hole is formed in the lower side of the self-locking sleeve in a penetrating mode; the driving block is positioned on the right side of the self-locking sleeve, the driving block is provided with a guide rod which is connected in the first through hole in a sliding mode in a leftward extending mode, the left end of the guide rod is provided with a guide block which is connected with the inner wall of the self-locking sleeve in a sliding mode, the guide rod is provided with a second key groove, and a flat key matched with the first key groove is arranged in the second key groove, so that the driving block can slide relative to the self-locking sleeve but cannot rotate; a first spring for forcing the driving block to move rightwards is arranged in the self-locking sleeve; the driving block is provided with a toggle groove with an upward opening, and the lower end of the self-locking block is provided with a toggle block extending into the toggle groove; the self-locking shaft lever is fixedly connected in the first mounting cavity; the self-locking block is rotatably connected to the self-locking shaft rod, and the part of the right end of the self-locking block, which extends out of the first mounting cavity, can be matched with the self-locking rod to complete self-locking; a horizontal second mounting cavity is arranged above the self-locking sleeve, a self-locking piston is connected in the second mounting cavity in a sliding mode, and a self-locking piston rod is arranged on the self-locking piston in a rightward extending mode; in the second mounting cavity, a left cavity communicated with the rod cavity is formed between the second mounting cavity and the left end of the self-locking piston, and a second spring for forcing the self-locking piston to move rightwards is arranged in the left cavity; and a right cavity communicated with the rodless cavity is formed between the second mounting cavity and the right end of the self-locking piston.
Preferably, a locking notch with a downward opening is formed at the right end of the self-locking block, and the locking notch is matched with the self-locking rod to limit the leftward displacement of the piston body at the rightmost end; the left end of the self-locking block is provided with a rotation stopping groove, when the self-locking piston rod extends into the rotation stopping groove, the self-locking block cannot rotate along the anticlockwise direction, and the self-locking rod cannot be separated from the locking opening; the upper part of the rotation stopping groove is provided with an auxiliary pushing surface, and when the self-locking piston rod acts on the auxiliary pushing surface, the self-locking block can be pushed to rotate clockwise; the self-locking block is provided with a positioning surface above the auxiliary pushing surface, and when the self-locking piston rod acts on the positioning surface, the self-locking piston rod cannot push the self-locking block to rotate.
Preferably, when the liquid is fed from the port B and returned from the port A, when the piston body moves rightwards to the right end of the driving block and is in contact with the self-locking rod, the self-locking rod pushes the driving block to move leftwards, and when the driving block moves leftwards, the driving block acts on the poking block through the poking groove, so that the self-locking block rotates clockwise; when the piston body contacts with the right end cover, the self-locking block rotates to the position where the self-locking piston rod contacts with the auxiliary pushing face, the self-locking piston extends rightwards under the action of pressure of the lever cavity to push the driving block to continue rotating clockwise, when the self-locking block rotates to the stopping groove to be opposite to the self-locking piston rod, the self-locking piston rod extends into the stopping groove, the self-locking block stops rotating, and the self-locking rod is completely positioned in the lock opening.
Preferably, when the liquid is fed from the port A and returned from the port B, the pressure of the port A acts on the self-locking piston to push the self-locking piston to move leftwards, so that the self-locking piston rod is separated from the anti-rotation groove; after the self-locking piston rod is separated from the rotation stopping groove, the driving block moves rightwards to push the self-locking block to rotate along the anticlockwise direction under the action of the first spring, so that the locking notch is gradually separated from the self-locking rod.
Preferably, a seal ring is sleeved on the outer side of the circumference of the piston body.
Preferably, a sealing ring is sleeved on the outer side of the circumference of the self-locking piston.
Compared with the prior art, the invention has the advantages that:
the locking assembly is matched with the self-locking rod, and the piston body is locked by the locking assembly when moving to the right end;
II, secondly: according to the invention, by arranging the self-locking piston, when high-pressure oil enters the rodless cavity, the piston body is unlocked by leftward movement of the self-locking piston, and the automatic unlocking device has a simple structure and is reliable to use.
Drawings
FIG. 1 is a schematic structural view of the present invention in an unlocked state;
FIG. 2 is a schematic structural view of the present invention in a self-locking state;
fig. 3 is a schematic structural diagram of the self-locking device in the self-locking process.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1-3, is a preferred embodiment of the present invention.
A self-locking hydraulic cylinder comprises a cylinder body 1, a left end cover 2, a right end cover 3, a limiting rod 4, a piston body 5, a locking assembly 6 and a self-locking rod 7; the cylinder body 1 is cylindrical, a left end cover 2 is fixedly arranged at one end of the cylinder body 1, a right end cover 3 is fixedly arranged at the other end of the cylinder body 1, a limiting rod 4 is arranged at an eccentric position between the left end cover 2 and the right end cover 3, a piston body 5 is connected in the cylinder body 1 in a sliding mode along the horizontal direction, and the piston body 5 is connected with the limiting rod 4 in a sliding mode; a piston rod extending out of the left end cover 2 extends leftwards from one end of the piston body 5 opposite to the left end cover 2; a rod cavity is formed between the piston body 5 and the left end cover 2 in the cylinder body 1, and a rodless cavity is formed between the piston body 5 and the right end cover 3; the side surface of the left end cover 2 is provided with a port B communicated with the rod cavity, and the side surface of the right end cover 3 is provided with a port A communicated with the rodless cavity; a first mounting cavity 51 is formed in the end face, opposite to the right end cover 3, of the piston body 5, and a locking assembly 6 is arranged in the first mounting cavity 51; a cavity 31 is arranged in the right end cover 3, a self-locking rod 7 matched with the locking assembly 6 is arranged in the cavity 31, the self-locking rod 7 is fixedly connected with the right end cover 3, and the axis of the self-locking rod 7 is vertical to the axis of the piston body 5; when the liquid is fed from the opening B and returned from the opening A, the piston body 5 drives the piston rod to move rightwards to contract, and when the piston body 5 drives the piston rod to completely contract, the locking assembly 6 is locked on the self-locking rod 7; when the liquid is fed from the opening A and returned from the opening B, the locking assembly 6 is unlocked, and the piston body 5 drives the piston rod to move leftwards and extend out.
The locking assembly 6 comprises a self-locking sleeve 61, a driving block 62, a self-locking block 63, a self-locking shaft 64 and a self-locking piston 66; the self-locking sleeve 61 is fixedly arranged in the first installation cavity 51, a first through hole which penetrates through the self-locking sleeve 61 is formed in the end face of the right side of the self-locking sleeve 61, a first key groove is formed in the first through hole, and a second through hole which penetrates through the self-locking sleeve 61 is formed in the lower side of the self-locking sleeve 61; the driving block 62 is positioned at the right side of the self-locking sleeve 61, the driving block 62 is provided with a guide rod 621 which is connected in the first through hole in a sliding manner in a leftward extending manner, the left end of the guide rod 621 is provided with a guide block which is connected with the inner wall of the self-locking sleeve 61 in a sliding manner, the guide rod 621 is provided with a second key slot, and a flat key 622 matched with the first key slot is arranged in the second key slot, so that the driving block 62 can slide relative to the self-locking sleeve 61 but cannot rotate; a first spring 611 for forcing the driving block 62 to move rightwards is arranged in the self-locking sleeve 61; a toggle groove 623 with an upward opening is formed in the driving block 62, and a toggle block 631 extending into the toggle groove 623 is arranged at the lower end of the self-locking block 63; the self-locking shaft lever 64 is fixedly connected in the first mounting cavity 51; the self-locking block 63 is rotatably connected to the self-locking shaft rod 64, and the part of the self-locking block 63, which extends out of the first mounting cavity 51, at the right end can be matched with the self-locking rod 7 to complete self-locking; a horizontal second mounting cavity 65 is arranged above the self-locking sleeve 61, a self-locking piston 66 is connected in the second mounting cavity 65 in a sliding manner, and a self-locking piston rod 661 extends rightwards from the self-locking piston 66; in the second mounting cavity 65, a left cavity communicated with the rod cavity is formed between the second mounting cavity 65 and the left end of the self-locking piston 66, and a second spring 651 for forcing the self-locking piston 66 to move rightwards is arranged in the left cavity; a right chamber communicating with the rodless chamber is formed between the second mounting chamber 65 and the right end of the self-locking piston 66.
The right end of the self-locking block 63 is provided with a locking notch 632 with a downward opening, and the locking notch 632 is matched with the self-locking rod 7 to limit the leftward displacement of the piston body 5 at the rightmost end; the left end of the self-locking block 63 is provided with a rotation stopping groove 633, when the self-locking piston rod 661 extends into the rotation stopping groove 633, the self-locking block 63 cannot rotate in the counterclockwise direction, and the self-locking lever 7 cannot be disengaged from the locking notch 632; an auxiliary pushing surface 634 is arranged at the upper part of the rotation stopping groove 633, and when the self-locking piston rod 661 acts on the auxiliary pushing surface 634, the self-locking block 63 can be pushed to rotate clockwise; a positioning surface 635 is arranged above the auxiliary pushing surface 634 on the self-locking block 63, and when the self-locking piston rod 661 acts on the positioning surface 635, the self-locking piston rod 661 can not push the self-locking block 63 to rotate.
When liquid is fed from the port B and returned from the port A, when the piston body 5 moves rightwards to the right end of the driving block 62 and is in contact with the self-locking rod 7, the self-locking rod 7 pushes the driving block 62 to move leftwards, and when the driving block 62 moves leftwards, the driving block acts on the shifting block 631 through the shifting groove 623, so that the self-locking block 63 rotates clockwise; when the piston body 5 contacts with the right end cover 3, the self-locking block 63 rotates to the position where the self-locking piston rod 661 contacts with the auxiliary pushing surface 634, the self-locking piston 66 extends rightward under the action of the pressure of the lever cavity to push the driving block 62 to continue rotating clockwise, when the self-locking block 63 rotates to the opposite direction of the rotation stopping groove 633 and the self-locking piston rod 661, the self-locking piston rod 661 extends into the rotation stopping groove 633, the self-locking block 63 stops rotating, and the self-locking rod 7 is completely located in the locking notch 632.
When the liquid is fed from the port A and returned from the port B, the pressure of the port A acts on the self-locking piston 66 to push the self-locking piston 66 to move leftwards, so that the self-locking piston rod 661 is separated from the rotation stopping groove 633; after the self-locking piston rod 661 is disengaged from the rotation-stopping groove 633, the driving block 62 moves rightward to push the self-locking block 63 to rotate counterclockwise under the action of the first spring 611, so that the locking notch 632 is gradually disengaged from the self-locking lever 7.
The working process of the self-locking hydraulic cylinder is as follows:
when the liquid enters from the port B and returns from the port A, as shown in fig. 1, the piston body 5 drives the piston rod to move and contract rightwards, in the process, the hydraulic pressure in the left chamber is larger than the hydraulic pressure in the right chamber, and the hydraulic pressure and the second spring 651 both force the self-locking piston 66 to move rightwards as the second spring 651 is compressed, and the axis of the self-locking piston rod 661 is intersected with the axis of the self-locking shaft rod 64, and the positioning surface 635 is in a vertical state at the moment, so that the self-locking piston rod 661 can limit the rotation of the self; then the right end of the driving block 62 contacts with the self-locking lever 7, the self-locking lever 7 pushes the driving block 62 to compress the first spring 611 to move leftwards, the self-locking block 62 moves leftwards to drive the toggle groove 623 to move leftwards, and the toggle groove 623 pushes the toggle block 631 and the self-locking block 63 to rotate clockwise around the self-locking shaft lever 64 as an axis.
As shown in fig. 3, when the piston body 5 moves to the rightmost end, the self-locking piston rod 661 contacts with the auxiliary pushing surface 634, the hydraulic pressure in the left chamber and the second spring 651 push the self-locking piston 66 and the self-locking piston rod 661 to move rightmost, the self-locking piston rod 661 cooperates with the auxiliary pushing surface 634 to make the self-locking block 63 and the shifting block 631 rotate clockwise, the shifting block 631 pushes the driving block 62 to move leftwards to the self-locking state shown in fig. 2, the self-locking piston rod 661 cooperates with the rotation-stopping groove 633 to limit the counterclockwise rotation of the self-locking block 63, and the locking notch 632 cooperates with the self-locking lever 7 to limit the clockwise rotation of the self-locking block 63, so that the locking assembly 6 locks the piston body 5 and the self-locking lever 7, thereby.
When liquid is fed from the port B and returned from the port A, the hydraulic pressure in the rodless cavity and the right cavity is increased, firstly, the hydraulic pressure in the right cavity pushes the self-locking piston 66 to move left, the self-locking piston rod 661 moves left away from the rotation stopping groove 633, then the first spring 611 pushes the driving block 62 to move right, simultaneously the poking groove 623 pushes the poking block 631 and the self-locking block 63 to rotate anticlockwise by taking the self-locking shaft rod 64 as an axis, simultaneously the hydraulic pressure in the rodless cavity pushes the piston body 5 to move leftwards, so that the locking port 632 is gradually separated from the self-locking rod 7, and after the hydraulic cylinder releases the self-locking, the piston body 5.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A self-locking hydraulic cylinder is characterized in that: the self-locking hydraulic cylinder comprises a cylinder body (1), a left end cover (2), a right end cover (3), a limiting rod (4), a piston body (5), a locking assembly (6) and a self-locking rod (7); the cylinder body (1) is cylindrical, a left end cover (2) is fixedly arranged at one end of the cylinder body (1), a right end cover (3) is fixedly arranged at the other end of the cylinder body (1), a limiting rod (4) is arranged between the left end cover (2) and the right end cover (3) at an eccentric position, a piston body (5) is connected in the cylinder body (1) in a sliding mode along the horizontal direction, and the piston body (5) is connected with the limiting rod (4) in a sliding mode; one end of the piston body (5), which is opposite to the left end cover (2), extends leftwards and is provided with a piston rod extending out of the left end cover (2); a rod cavity is formed between the piston body (5) and the left end cover (2) in the cylinder body (1), and a rodless cavity is formed between the piston body (5) and the right end cover (3); the side surface of the left end cover (2) is provided with a port B communicated with the rod cavity, and the side surface of the right end cover (3) is provided with a port A communicated with the rodless cavity; a first mounting cavity (51) is formed in the end face, opposite to the right end cover (3), of the piston body (5), and a locking assembly (6) is arranged in the first mounting cavity (51); a cavity (31) is arranged in the right end cover (3), a self-locking rod (7) matched with the locking assembly (6) is arranged in the cavity (31), the self-locking rod (7) is fixedly connected with the right end cover (3), and the axis of the self-locking rod (7) is vertical to the axis of the piston body (5); when the liquid is fed from the opening B and returned from the opening A, the piston body (5) drives the piston rod to move rightwards to contract, and when the piston body (5) drives the piston rod to completely contract, the locking assembly (6) is locked on the self-locking rod (7); when the liquid is fed from the opening A and returned from the opening B, the locking assembly (6) is unlocked, and the piston body (5) drives the piston rod to move leftwards and extend out.
2. The self-locking hydraulic cylinder of claim 1, wherein: the locking assembly (6) comprises a self-locking sleeve (61), a driving block (62), a self-locking block (63), a self-locking shaft lever (64) and a self-locking piston (66); the self-locking sleeve (61) is fixedly arranged in the first installation cavity (51), a first through hole which penetrates through the self-locking sleeve (61) is formed in the end face of the right side of the self-locking sleeve (61), a first key groove is formed in the first through hole, and a second through hole which penetrates through the self-locking sleeve (61) is formed in the lower side of the self-locking sleeve (61); the driving block (62) is located on the right side of the self-locking sleeve (61), a guide rod (621) connected in a sliding mode in the first through hole is arranged in the driving block (62) in a leftward extending mode, a guide block connected with the inner wall of the self-locking sleeve (61) in a sliding mode is arranged at the left end of the guide rod (621), a second key groove is formed in the guide rod (621), and a flat key (622) matched with the first key groove is arranged in the second key groove, so that the driving block (62) can slide relative to the self-locking sleeve (61) but cannot rotate; a first spring (611) forcing the driving block (62) to move rightwards is arranged in the self-locking sleeve (61); a toggle groove (623) with an upward opening is formed in the driving block (62), and a toggle block (631) extending into the toggle groove (623) is arranged at the lower end of the self-locking block (63); the self-locking shaft lever (64) is fixedly connected in the first mounting cavity (51); the self-locking block (63) is rotatably connected to the self-locking shaft rod (64), and the part of the self-locking block (63) extending out of the first mounting cavity (51) at the right end can be matched with the self-locking rod (7) to complete self-locking; a horizontal second mounting cavity (65) is arranged above the self-locking sleeve (61), a self-locking piston (66) is connected in the second mounting cavity (65) in a sliding mode, and a self-locking piston rod (661) extends rightwards from the self-locking piston (66); a left cavity communicated with the rod cavity is formed between the second mounting cavity (65) and the left end of the self-locking piston (66) in the second mounting cavity (65), and a second spring (651) forcing the self-locking piston (66) to move rightwards is arranged in the left cavity; a right chamber communicated with the rodless chamber is formed between the second mounting chamber (65) and the right end of the self-locking piston (66).
3. The self-locking hydraulic cylinder according to claim 2, characterized in that the right end of the self-locking block (63) is provided with a locking notch (632) with a downward opening, and the locking notch (632) is matched with the self-locking rod (7) to limit the leftward displacement of the piston body (5) at the rightmost end; the left end of the self-locking block (63) is provided with a rotation stopping groove (633), when the self-locking piston rod (661) extends into the rotation stopping groove (633), the self-locking block (63) cannot rotate along the anticlockwise direction, and the self-locking rod (7) cannot be separated from the locking notch (632); an auxiliary pushing surface (634) is arranged at the upper part of the rotation stopping groove (633), and when the self-locking piston rod (661) acts on the auxiliary pushing surface (634), the self-locking block (63) can be pushed to rotate clockwise; a positioning surface (635) is arranged above the auxiliary pushing surface (634) on the self-locking block (63), and when the self-locking piston rod (661) acts on the positioning surface (635), the self-locking piston rod (661) cannot push the self-locking block (63) to rotate.
4. The self-locking hydraulic cylinder according to claim 3, characterized in that when the liquid enters from port B and returns from port A, when the piston body (5) moves rightwards until the right end of the driving block (62) is contacted with the self-locking rod (7), the self-locking rod (7) pushes the driving block (62) to move leftwards, and when the driving block (62) moves leftwards, the driving block (62) acts on the shifting block (631) through the shifting groove (623), so that the self-locking block (63) rotates clockwise; when piston body (5) and right-hand member lid (3) contact, from locking piece (63) rotatory auto-lock piston rod (661) and supplementary push away the face (634) position of contact, auto-lock piston (66) are stretched out to the right under having lever cavity pressure effect, promote drive block (62) and continue to rotate along clockwise, when auto-lock piece (63) rotatory to the groove of stopping revolving (633) and auto-lock piston rod (661) relative time, auto-lock piston rod (661) stretch into in the groove of stopping revolving (633), auto-lock piece (63) stall, auto-lock pole (7) are located fore shaft (632) completely.
5. The self-locking hydraulic cylinder according to claim 3, characterized in that when the port A is fed with liquid and the port B is fed with liquid, the pressure of the port A acts on the self-locking piston (66) to push the self-locking piston (66) to move leftwards, so that the self-locking piston rod (661) is separated from the anti-rotation groove (633); after the self-locking piston rod (661) is separated from the rotation-stopping groove (633), under the action of the first spring (611), the driving block (62) moves rightwards to push the self-locking block (63) to rotate along the anticlockwise direction, so that the locking notch (632) is gradually separated from the self-locking rod (7).
6. The self-locking hydraulic cylinder according to claim 1, characterized in that a sealing ring is sleeved on the outer side of the circumference of the piston body (5).
7. The self-locking hydraulic cylinder according to claim 2, characterized in that a sealing ring is sleeved on the outer side of the circumference of the self-locking piston (66).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011594015.7A CN112594250A (en) | 2020-12-29 | 2020-12-29 | Self-locking hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011594015.7A CN112594250A (en) | 2020-12-29 | 2020-12-29 | Self-locking hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN112594250A true CN112594250A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011594015.7A Withdrawn CN112594250A (en) | 2020-12-29 | 2020-12-29 | Self-locking hydraulic cylinder |
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| CN (1) | CN112594250A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202957A (en) * | 2021-05-17 | 2021-08-03 | 师海荣 | Axial flow type check valve |
-
2020
- 2020-12-29 CN CN202011594015.7A patent/CN112594250A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202957A (en) * | 2021-05-17 | 2021-08-03 | 师海荣 | Axial flow type check valve |
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Application publication date: 20210402 |
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| WW01 | Invention patent application withdrawn after publication |