CN114278644B - Self-locking oil cylinder and working machine - Google Patents
Self-locking oil cylinder and working machine Download PDFInfo
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- CN114278644B CN114278644B CN202210006516.1A CN202210006516A CN114278644B CN 114278644 B CN114278644 B CN 114278644B CN 202210006516 A CN202210006516 A CN 202210006516A CN 114278644 B CN114278644 B CN 114278644B
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- 230000009471 action Effects 0.000 claims abstract description 3
- 239000003921 oil Substances 0.000 claims description 126
- 239000010720 hydraulic oil Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000007246 mechanism Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The application relates to the technical field of hydraulic cylinders, and provides a self-locking cylinder and an operation machine. The self-locking oil cylinder comprises: the hydraulic cylinder comprises an oil cylinder shell, wherein a control oil port is arranged on the side wall of the oil cylinder shell, at least part of hydraulic rods are arranged in the oil cylinder shell, and a moving part, a first elastic part and a brake block are also arranged in the oil cylinder shell; the movable piece is arranged outside the hydraulic rod and is in sliding fit with the brake block, and the movable piece can move along a first direction under the action of the first elastic piece so as to push the brake block to lock the hydraulic rod. According to the self-locking oil cylinder, unlocking and self-locking of the oil cylinder are realized in the sliding process of the moving part, so that the oil cylinder can still perform self-locking in the state that oil pressure instability or oil supply is not provided for the front cavity and the rear cavity of the oil cylinder, and the self-locking stability of the oil cylinder is improved.
Description
Technical Field
The application relates to the technical field of hydraulic cylinders, in particular to a self-locking cylinder and an operation machine.
Background
In the working process of engineering machinery, the hydraulic cylinder serves as one of main execution elements to play an important role in a hydraulic system, and the execution mechanism is driven to realize a design function. Under some working conditions, the hydraulic cylinder is required to keep the locking function for a certain period of time, namely, the hydraulic rod does not move relative to the hydraulic cylinder barrel. In the prior art, a self-locking mechanism of a self-locking oil cylinder is controlled by utilizing hydraulic oil of a main oil cylinder, and when the hydraulic oil at two sides is out of pressure and is unstable due to leakage and other problems, self-locking failure can be caused.
Disclosure of Invention
The application provides a self-locking oil cylinder and an operation machine, which are used for solving the defect that in the prior art, after the hydraulic oil on two sides of a hydraulic rod is out of pressure and unstable, a self-locking mechanism of the oil cylinder is out of lock.
The application provides a self-locking oil cylinder, which comprises: the hydraulic cylinder comprises an oil cylinder shell, wherein a control oil port is arranged on the side wall of the oil cylinder shell, at least part of hydraulic rods are arranged in the oil cylinder shell, and a moving part, a first elastic part and a brake block are also arranged in the oil cylinder shell; the movable piece is arranged outside the hydraulic rod and is in sliding fit with the brake block, and the movable piece can move along a first direction under the action of the first elastic piece so as to push the brake block to lock the hydraulic rod.
According to the self-locking oil cylinder provided by the application, an oil cavity is formed between the moving part and the control oil port, and when the oil cavity is filled with oil, hydraulic oil can push the moving part to move along a second direction so as to unlock the hydraulic rod by the brake block; wherein the second direction is opposite to the first direction.
According to the self-locking oil cylinder provided by the application, the brake block is provided with the first surface which is in sliding fit with the moving part, and the second surface of the brake block is adjacent to the surface of the hydraulic rod, wherein the first surface is a first inclined surface.
The self-locking oil cylinder provided by the application further comprises: the guide ring is sleeved outside the hydraulic rod, two ends of the guide ring are respectively sleeved in the two moving parts, at least one through groove is formed in the guide ring along the circumferential direction of the guide ring, and the brake block is arranged in the through groove.
According to the self-locking oil cylinder provided by the application, the first surface of each brake block forms the second inclined plane from the center to the two ends, the thickness of the center is larger than that of the two ends, and the second inclined plane and the first inclined plane have the same inclination angle and opposite inclination directions.
According to the self-locking oil cylinder provided by the application, the guide ring is provided with two through grooves along the length direction of the guide ring.
According to the self-locking oil cylinder provided by the application, the first surface of each brake block is provided with the third inclined plane, the thickness dimension of the third inclined plane is larger than that of one end of the third inclined plane, which is far away from the control oil port, and the inclination angle of the third inclined plane is the same as that of the first inclined plane and the inclination direction of the third inclined plane is opposite to that of the first inclined plane.
According to the self-locking oil cylinder provided by the application, the self-locking oil cylinder further comprises at least one second elastic piece, wherein the second elastic piece is arranged in the moving piece and is contacted with the end face of the guide ring.
According to the self-locking oil cylinder provided by the application, the self-locking oil cylinder further comprises a guide sleeve, wherein the guide sleeve is in threaded connection with the oil cylinder shell, and the guide sleeve is in contact with any one of the first elastic pieces.
The application also provides a working machine comprising the self-locking oil cylinder.
According to the self-locking oil cylinder, the moving part, the brake block and the first elastic part are arranged, the moving part slides along the surface of the brake block by utilizing the comparison between the pressure of pressure oil and the elastic force of the elastic part, and the unlocking and self-locking of the oil cylinder are realized in the sliding process of the moving part, so that the oil cylinder can still perform self-locking in the state that the oil pressure of the front cavity and the back cavity is unstable or oil is not supplied, and the stability of the self-locking function of the oil cylinder is improved.
Drawings
In order to more clearly illustrate the application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a self-locking cylinder according to the present application;
fig. 2 is a perspective view of the guide ring shown in fig. 1;
reference numerals:
10: an oil cylinder housing; 11: an oil port is controlled; 20: a moving member;
21: a gap; 31: a guide ring; 32: a brake block;
40: a first elastic member; 50: a second elastic member; 60: a guide sleeve;
311: and (5) through grooves.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The features of the application "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The self-locking cylinder and the working machine of the present application are described below with reference to fig. 1 and 2.
As shown in fig. 1, in one embodiment of the present application, a self-locking cylinder includes: the hydraulic cylinder comprises a cylinder housing 10, a moving member 20, a brake block 32, a hydraulic rod and a first elastic member 40. The lateral wall of hydro-cylinder casing 10 is equipped with control hydraulic fluid port 11, and at least part hydraulic stem sets up in hydro-cylinder casing 10, and moving member 20, first elastic component 40 and brake shoe 32 also set up in hydro-cylinder casing 10, and wherein, moving member 20 establishes in the outside of hydraulic stem, and moving member 20 and brake shoe 32 sliding fit can follow the first direction removal under the effect of first elastic component 40 to promote brake shoe 32 locking hydraulic stem.
Specifically, in this embodiment, the side wall of the cylinder housing 10 is provided with the control oil port 11 for introducing pressure oil into the cylinder housing 10, the moving member 20 is disposed in the cylinder housing 10, and the first elastic member 40 is disposed between the end surface of the cylinder housing 10 and the moving member 20, so that when the pressure oil is not introduced into the control oil port 11, the first elastic member 40 can push the moving member 20 to move along the first direction by using its own elastic force, so that the moving member 20 contacts with the brake block 32, and the brake block 32 compresses the hydraulic rod, thereby realizing self-locking of the cylinder.
Alternatively, in one embodiment of the present application, the outer surface of the moving member 20 is fitted with the inner surface of the cylinder housing 10 to block the pressure oil entering the cylinder housing 10 from the control port 11. The end surface of the moving member 20 and the control oil port 11 form an oil cavity, and after the pressure oil enters from the control oil port 11, the moving member 20 can be pushed to move along the second direction, so that the brake block 32 can unlock the hydraulic rod. Optionally, a sealing ring may be disposed between the outer surface of the moving member 20 and the inner surface of the cylinder housing 10 to seal hydraulic oil, so that the hydraulic oil has a certain pressure, and can overcome the elastic force of the first elastic member 40 to push the moving member 20 to move along the second direction. It should be noted that: in the embodiment of the application, the first direction is the direction along the hydraulic rod approaching the control port 11, and the second direction is the direction along the hydraulic rod departing from the control port 11.
Further, in one embodiment of the present application, the inner surface of the moving member 20 slides in engagement with the first surface of the brake pad 32, and the second surface of the brake pad 32 contacts the hydraulic lever.
Specifically, in the first state, that is, when the pressure oil is introduced into the control oil port 11, the pressure oil enters from the control oil port 11, at this time, the pressure of the pressure oil is greater than the elastic force of the first elastic member 40, the pressure oil pushes the moving member 20 to move along the second direction, the degree of fitting between the moving member 20 and the brake block 32 is gradually reduced, the pressing force of the brake block 32 on the hydraulic rod is gradually reduced, the hydraulic rod moves freely, and the oil cylinder is unlocked. In the second state, that is, when the pressure oil is not introduced into the control oil port 11 or the oil cylinder is in a pressure loss state, the first elastic member 40 positioned between the oil cylinder shell 10 and the moving member 20 pushes the moving member 20 to move along the first direction by using the self elastic force, at this time, the fitting degree of the inner surface of the moving member 20 and the first surface of the brake block 32 is gradually increased, the brake block 32 is extruded by the moving member 20, the pressing force of the brake block 32 on the hydraulic rod is increased, and the self-locking of the oil cylinder is realized.
Further, in one embodiment of the present application, the number of moving members 20 may be one or two. When the number of moving members 20 is two, an oil chamber is formed between the two moving members 20, and the oil chamber communicates with the control port 11 so that pressure oil is introduced. Accordingly, the number of the first elastic members 40 may be one or two. When the number of the moving members 20 is two, the number of the first elastic members 40 is also two.
Further, in one embodiment of the present application, the first elastic member 40 may be a belleville spring.
Further, in one embodiment of the present application, the moving member 20 may be a cylindrical member, the inner surface of the moving member 20 is provided with a slope having the same inclination angle and opposite inclination direction to the first surface of the brake block 32, and when the moving member 20 moves in the first direction, a portion of the brake block 32 is sleeved in the moving member 20, and when the moving member 20 moves in the second direction, the brake block 32 is separated from the moving member 20.
Further, when the number of moving members 20 is one, the first surface of the stopper 32 has a slope having the same inclination angle as the inner surface of the moving member 20 in the opposite inclination direction. When the number of the moving members 20 is two, the first surface of the brake block 32 has two inclined surfaces, the two inclined surfaces incline in opposite directions, and the two inclined surfaces respectively slide in cooperation with one moving member 20, so that the unlocking and locking of the hydraulic rod are realized.
According to the self-locking oil cylinder provided by the embodiment of the application, the moving part, the brake block and the first elastic part are arranged, the moving part slides along the surface of the brake block by utilizing the comparison between the pressure of pressure oil and the elastic force of the elastic part, and the unlocking and self-locking of the oil cylinder are realized in the sliding process of the moving part, so that the oil cylinder can still perform self-locking in the state that the oil pressure of the front cavity and the back cavity is unstable or oil is not supplied, and the stability of the self-locking function of the oil cylinder is improved.
As shown in fig. 1, in one embodiment of the present application, the number of moving members 20 is two, the two moving members 20 are oppositely disposed in the cylinder housing 10, and an oil cavity is formed between the two moving members 20, and the oil cavity is communicated with the control oil port 11, wherein the number of the first elastic members 40 is also two.
Specifically, in this embodiment, when hydraulic oil is introduced into the control oil port 11, the hydraulic oil 11 enters the oil cavity, and pushes the two moving members 20 to move in opposite directions, so that the degree of adhesion between the two moving members 20 and the brake pad 32 gradually decreases, the pressing force of the brake pad 32 on the hydraulic rod decreases, and the hydraulic rod is unlocked and can freely expand and contract. When hydraulic oil is not introduced into the control oil port 11, the two first elastic pieces 40 push the two moving pieces 20 to move relatively by utilizing the elastic force of the two first elastic pieces, the degree of the fitting of the two moving pieces 20 and the brake block 32 is gradually increased, the brake block 32 is extruded by the moving pieces 20, the pressing force of the brake block 32 on a hydraulic rod is increased, and finally the brake block 32 is fitted with the hydraulic rod, so that the self-locking of the oil cylinder is realized.
As shown in fig. 1, in one embodiment of the present application, at least a portion of the inner surface of each moving member 20 is provided with a first slope that slides in cooperation with the first surface of the brake pad 32.
Specifically, according to the number of the brake pads 32, the inner surface of the moving member 20 may be provided with a first inclined surface at a position where the inner surface slides in cooperation with the brake pads 32, and if the number of the brake pads 32 is one, only the inner surface of the moving member 20 may be provided with a first inclined surface; if the number of the brake pads 32 is plural, plural first slopes are provided on the inner surface of the moving member 20. Specifically, when the first surface of the brake pad 32 is planar, the first slope is also planar; when the first surface of the brake block 32 is an arc surface, the inner hole of the moving member 20 is a truncated cone, and the inner surface of the moving member 20 is a first inclined surface.
As shown in fig. 1, in one embodiment of the present application, the self-locking cylinder further includes a guide ring 31. The two ends of the guide ring 31 are respectively sleeved in the moving member 20, the guide ring 31 is provided with at least one through groove 311 along the circumferential direction, and the brake block 32 is arranged in the through groove 311.
Specifically, the surface of the guide ring 31 may be provided with at least one through groove 311 along the circumferential direction thereof, each through groove 311 being provided with one brake pad 32 therein, and the inner surface of the moving member 20 being in contact with the first surface of the brake pad 32 and being capable of sliding along the first surface of the brake pad 32. When the pressure oil is introduced into the control oil port 11, the two moving members 20 slide along the first surface of the brake block 32 toward the two ends of the cylinder housing 10 respectively, and squeeze the first elastic member 40 located between the cylinder housing 10 and the moving members 20, at this time, the second surface of the brake block 32 is released from the hydraulic rod, and the hydraulic rod can move freely. When the pressure oil is not introduced into the control oil port 11 or the oil cylinder is in a pressure-losing state, the first elastic piece 40 is reset, the moving piece 20 is pushed to slide to the position of the control oil port 11 along the first surface of the brake block 32 by utilizing the elastic force of the first elastic piece, the brake block 32 is extruded by the moving piece 20, and the brake block 32 is tightly held with the hydraulic rod, so that the self-locking of the oil cylinder is realized.
Optionally, as shown in fig. 2, in an embodiment of the present application, a plurality of through grooves 311 are formed on the surface of the guide ring 31 along the circumferential direction thereof, each through groove 311 is centrally disposed, the first surface of each brake block 32 forms a second inclined plane from the center to both ends thereof, the thickness of the center is greater than that of both ends, and the first inclined plane and the second inclined plane of each moving member 20 have the same inclination angle and opposite inclination directions.
Specifically, in the present embodiment, each through groove 311 is uniformly provided along the circumference of the guide ring 31, only one through groove 311 is provided along the length of the guide ring 31, and the brake pad 32 is provided in the through groove 311. The first surface of each brake pad 32 defines a second slope from the center to both sides. That is, in the present embodiment, the first surface of the brake pad 32 has the second slopes inclined leftward and rightward, respectively. The inclination direction of the first inclined plane of the two moving parts 20 is opposite to the inclination direction of the second inclined plane matched with the first inclined plane, and the inclination angles are the same, so that the first inclined plane can be completely attached to the second inclined plane when the moving parts 20 slide, and the brake block 32 is tightly held with the hydraulic rod.
Specifically, in the present embodiment, two moving members 20 slide in cooperation with one brake block 32. When the pressure oil is introduced into the control oil port 11, the pressure oil pushes the two moving parts 20 to move towards the two ends of the oil cylinder shell 10 respectively, at this time, the position where the first inclined surface of the moving part 20 is attached to the second inclined surface of the brake block 32 is gradually reduced, the extrusion force of the moving part 20 to the brake block 32 is reduced, the holding force of the brake block 32 to the hydraulic rod is relieved, the hydraulic rod can move freely, and the unlocking of the oil cylinder is realized. When the pressure oil is not introduced into the control oil port 11 or the oil cylinder is out of pressure, the first elastic piece 40 positioned between the oil cylinder shell 10 and the moving piece 20 pushes the moving piece 20 to slide towards the direction of the control oil port 11, the joint position of the first inclined plane and the second inclined plane is gradually enlarged, and the moving piece 20 extrudes the brake block 32, so that the brake block 32 is tightly held by the hydraulic rod, and the self-locking of the oil cylinder is realized.
Alternatively, in another embodiment of the present application, the guide ring 31 is provided with two circles of through grooves 311 in the circumferential direction thereof, that is, two through grooves 311 are provided in the length direction of the guide ring 31. In this embodiment, the first surface of each brake pad 32 is provided with a third inclined plane, the third inclined plane is close to one end of the control oil port 11, the thickness dimension of the third inclined plane is larger than the thickness dimension of one end of the third inclined plane away from the control oil port 11, and the inclination angle of the third inclined plane is the same as that of the first inclined plane of the moving member 20, and the inclination directions are opposite.
Specifically, in the present embodiment, each guide ring 31 is provided with a pair of through grooves 311 in the longitudinal direction thereof, and at the same time, a plurality of pairs of through grooves 311 are provided in the circumferential direction of the guide ring 31, and one brake pad 32 is provided in each through groove 311. In this embodiment, the first surface of each brake pad 32 has a third chamfer.
Specifically, in the present embodiment, each of the moving members 20 slides in cooperation with one of the brake pads 32. When the pressure oil is introduced into the control oil port 11, the pressure oil pushes the two moving parts 20 to move towards the two ends of the oil cylinder shell 10 respectively, at this time, the position where the first inclined surface of the moving part 20 is attached to the third inclined surface of the brake block 32 is gradually reduced, the extrusion force of the moving part 20 to the brake block 32 is reduced, the brake block 32 releases the holding force to the hydraulic rod, and the hydraulic rod can move freely, so that the unlocking of the oil cylinder is realized. When the pressure oil is not introduced into the control oil port 11 or the oil cylinder is out of pressure, the first elastic piece 40 positioned between the oil cylinder shell 10 and the moving piece 20 pushes the moving piece 20 to slide towards the direction of the control oil port 11, and the joint position of the first inclined plane and the third inclined plane is gradually enlarged, so that the brake block 32 is tightly held with the hydraulic rod, and the self-locking of the oil cylinder is realized.
It should be noted that: the inclination of the inclined plane can be designed according to specific working conditions, and the inclination is different, so that the speed of the moving part 20 attaching to and detaching from the brake block 32 can be different, and the self-locking time of the oil cylinder is further affected.
According to the self-locking oil cylinder provided by the embodiment of the application, the surfaces of the brake block and the surface of the moving part are provided with the inclined planes which are matched and slide, so that the hydraulic rod is held tightly when the two inclined planes are completely attached, the hydraulic rod can move freely when the two inclined planes are detached from the attachment, the locking structure is simple, the locking effect is more reliable, locking failure is not easy to occur, and the stability of the oil cylinder in self-locking is improved.
As shown in fig. 1, in one embodiment of the present application, the self-locking cylinder further includes a pair of second elastic members 50, and each of the second elastic members 50 is disposed in the moving member 20 and contacts with an end surface of the guide ring 31.
Specifically, the second elastic member 50 is disposed in the moving member 20 and contacts the guide ring 31, when the brake block 32 releases the hydraulic rod from holding, the hydraulic rod can move freely, in the moving process of the hydraulic rod, in order to prevent the hydraulic rod from driving the brake block 32 to move together, the second elastic member 50 is disposed between the moving member 20 and the guide ring 31, when the brake block 32 moves, the second elastic member 50 is pressed, and the second elastic member 50 uses its own elastic force to urge the brake block 32 to return, so that the brake block 32 is ensured not to hold the hydraulic rod accidentally in the moving process of the hydraulic rod.
In one embodiment of the present application, the shape of the through groove 311 may be a rectangular groove or a waist-shaped groove, and accordingly, the shape of the brake pad 32 matches the shape of the through groove 311. Alternatively, in the embodiment of the present application, the through groove 311 is a rectangular groove.
It will be appreciated that: the above list is two forms of the through groove 311, and other shapes of the through groove capable of achieving the function are also within the scope of the present application.
As shown in fig. 1, in one embodiment of the present application, the self-locking cylinder further includes a guide sleeve 60, the guide sleeve 60 is screwed with the cylinder housing 10, and the guide sleeve 60 is in contact with any one of the first elastic members 40.
Specifically, after the first elastic member 40, the moving member 20, the second elastic member 50, the guide ring 31 and the brake block 32 are mounted, the guide sleeve 60 with external threads is screwed into the cylinder housing 10 to complete the assembly of the self-locking cylinder. The preload and sensitivity can be determined by the depth to which the guide sleeve 60 is threaded into the cylinder housing 10.
The embodiment of the application also provides a working machine which comprises the self-locking oil cylinder. Specifically, the work machine may be a crane, an excavator, a dump truck, or the like.
According to the working machine provided by the embodiment of the application, the self-locking oil cylinder is arranged, so that the working machine can be locked when the oil pressure in the front cavity and the rear cavity of the oil cylinder is unstable, the stability of the oil cylinder is improved, and the operation safety of the working machine is enhanced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (8)
1. The utility model provides a self-locking hydro-cylinder which characterized in that includes:
the hydraulic cylinder comprises an oil cylinder shell, wherein a control oil port is arranged on the side wall of the oil cylinder shell, at least part of hydraulic rods are arranged in the oil cylinder shell, and a moving part, a first elastic part, a brake block, a guide ring and at least one second elastic part are also arranged in the oil cylinder shell;
the movable piece is arranged outside the hydraulic rod and is in sliding fit with the brake block, and the movable piece can move along a first direction under the action of the first elastic piece so as to push the brake block to lock the hydraulic rod;
the guide ring is sleeved outside the hydraulic rod, two ends of the guide ring are sleeved in the two moving parts respectively, at least one through groove is formed in the guide ring along the circumferential direction of the guide ring, and the brake block is arranged in the through groove;
the second elastic piece is arranged in the moving piece and is contacted with the end face of the guide ring.
2. The self-locking oil cylinder according to claim 1, wherein an oil cavity is formed between the moving member and the control oil port, and when the oil cavity is filled with oil, hydraulic oil can push the moving member to move along a second direction so as to unlock the hydraulic rod by the brake block;
wherein the second direction is opposite to the first direction.
3. The self-locking cylinder according to claim 1 or 2, wherein the brake block is provided with a first surface in sliding fit with the moving member, and a second surface of the brake block is adjacent to a surface of the hydraulic rod, wherein the first surface is a first inclined surface.
4. The self-locking cylinder as claimed in claim 3, wherein the first surface of each of the brake pads has a second inclined surface formed from a center thereof to both ends, and a thickness of the center is greater than that of both ends, and the second inclined surface has the same inclination angle and opposite inclination direction as those of the first inclined surface.
5. The self-locking cylinder as claimed in claim 3, wherein the guide ring is provided with two through grooves along a length direction thereof.
6. The self-locking cylinder according to claim 5, wherein the first surface of each of the brake blocks is provided with a third inclined surface, the third inclined surface is close to one end of the control oil port, the thickness dimension of the third inclined surface is larger than that of one end of the third inclined surface, which is far away from the control oil port, and the inclination angle of the third inclined surface is the same as that of the first inclined surface, and the inclination directions of the third inclined surface are opposite.
7. The self-locking cylinder of claim 1, further comprising a guide sleeve threadably coupled to the cylinder housing, the guide sleeve in contact with any of the first elastic members.
8. A work machine comprising the self-locking cylinder of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210006516.1A CN114278644B (en) | 2022-01-05 | 2022-01-05 | Self-locking oil cylinder and working machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210006516.1A CN114278644B (en) | 2022-01-05 | 2022-01-05 | Self-locking oil cylinder and working machine |
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| CN114278644A CN114278644A (en) | 2022-04-05 |
| CN114278644B true CN114278644B (en) | 2023-11-28 |
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