CN113323943A - Stroke-adjustable double-stroke single-stage double-acting drill rod clamping oil cylinder - Google Patents
Stroke-adjustable double-stroke single-stage double-acting drill rod clamping oil cylinder Download PDFInfo
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- CN113323943A CN113323943A CN202110569792.4A CN202110569792A CN113323943A CN 113323943 A CN113323943 A CN 113323943A CN 202110569792 A CN202110569792 A CN 202110569792A CN 113323943 A CN113323943 A CN 113323943A
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- Prior art keywords
- primary
- stage
- guide sleeve
- tertiary
- stroke
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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
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic 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
- F15B15/08—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
- F15B15/1447—Pistons; Piston to piston rod assemblies
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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
- F15B15/1457—Piston rods
Abstract
The invention belongs to the technical field of oil cylinders, and particularly relates to a stroke-adjustable double-stroke single-stage double-acting drill rod clamping oil cylinder which comprises a primary motion assembly, a secondary motion assembly and a tertiary motion assembly, wherein the primary motion assembly comprises a primary piston rod, a primary front end cover, a primary piston and a primary guide sleeve, the secondary motion assembly comprises a secondary piston, and the tertiary motion assembly comprises a tertiary cylinder cover, a tertiary guide sleeve I, a tertiary cylinder barrel and a tertiary guide sleeve II; the three-stage motion assembly forms an oil cylinder base, is fixed on a structural member of the whole machine through a flange and is static relative to the whole machine. The second-stage motion assembly can axially slide relative to a third-stage guide sleeve I in the third-stage motion assembly. The primary motion assembly is capable of sliding over the secondary motion assembly and the tertiary motion assembly. The operation of the guide stroke and the clamping stroke is not divided in sequence, and the action sequence is controllable, reliable and not disordered.
Description
Technical Field
The invention belongs to the technical field of oil cylinders, and particularly relates to a stroke-adjustable double-stroke single-stage double-acting drill rod clamping oil cylinder.
Background
The deviation of the drilling position of the mining trolley is the main reason of the deviation of the drilling hole, and the key factor of the deviation of the drilling hole is the deviation of the drilling hole caused by the fact that the drill rod clamp is not at the guide position of the drill rod when the rock drilling equipment drills the hole, so that the blasting effect is influenced. Therefore, the drill rod clamping device is used as an important part of the mining trolley and plays an important role in improving the drilling precision and the working efficiency of the loading and unloading rod.
The drill rod clamping oil cylinder is key equipment of the drill rod clamping device, and drill rod tapping guide and drill rod clamping actions are achieved through movement of a piston rod in the oil cylinder. When the drill rod clamping oil cylinder is located at the hole opening guide position, the distance between the flange at the extending end of the piston rod of the oil cylinder and the drill rod is 1-2mm, and the purpose that the clearance is adjusted before drilling is to control the coaxiality of the drill rod and the rock drill within a proper range, so that the drilling direction can be more accurate. This is the opening guide stroke. When the drill rod clamping oil cylinder is in a working condition of loading and unloading rods, the piston rod of the oil cylinder needs to clamp the drill rod so as to carry out necessary operation of the rod connecting and unloading rods. This is the drill rod clamping stroke. Therefore, the drill rod clamping cylinder of the mining trolley is a double-stroke double-acting cylinder with small difference of two strokes and controllable sequential action.
The prior technical scheme has two types, namely a scheme I: the opposed hydraulic drill rod clamping device is simple in structure and strong in interchangeability, the oil cylinder is of a double-acting single-piston structure, and clamping and opening actions are realized through movement of a piston rod in the oil cylinder. The second scheme is the Chinese patent 'a three-oil-port two-stage double-acting hydraulic cylinder with controllable action sequence' (CN 107327440A), which discloses a three-oil-port two-stage double-acting hydraulic cylinder with controllable action sequence, wherein the first-stage cylinder is a guide stroke when extending out, and the second-stage cylinder is a clamping stroke when extending out. The scheme has the advantages of capability of pushing two-stage loads, two-stage travel, reliable action sequence, no follow-up of a connecting pipeline and the like.
After being applied to mining trolley drill clamp ware, above two kinds of schemes all have some shortcomings and drawbacks, and the drawback of scheme one is when pressure oil enters from an hydraulic fluid port, and the hydro-cylinder stretches out until the stroke finishes, and this structure can realize the drilling rod and connect and unload the pole function, but can't fix a position the opening position and realize trompil direction function. The second scheme has the disadvantage that the second scheme is a conventional multi-stage oil cylinder rather than a single-stage cylinder with adjustable stroke from the function realization point of view. Therefore, the two-stage oil cylinder stroke (the guide stroke and the clamping stroke) is different greatly, and the objective requirement that the guide stroke and the clamping stroke of the drill rod clamping device oil cylinder are not different greatly is difficult to meet the requirement of the mining trolley. In addition, the action sequence of the second scheme is not controllable, the first-stage cylinder (guide stroke) can only be stretched out firstly when the mining trolley is used, and then the second-stage cylinder (clamping stroke) can be stretched out, so that the operation is more complicated and the efficiency is lower when the mining trolley is used.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the double-stroke single-stage double-acting drill rod clamping oil cylinder with the adjustable stroke, the drill rod clamping oil cylinder is provided with three oil ports A, B, C, and when high-pressure oil is introduced into an oil port A, the oil port A is the clamping stroke, so that the drill rod clamping function of the oil cylinder is realized. When the oil port C is communicated with high-pressure oil, the oil cylinder is guided to travel, and the function of guiding and opening the hole of the oil cylinder is achieved.
The invention is realized by the following technical scheme: a stroke-adjustable double-stroke single-stage double-acting drill rod clamping oil cylinder comprises a primary motion assembly, a secondary motion assembly and a tertiary motion assembly, wherein the primary motion assembly comprises a primary piston rod, a primary front end cover, a primary piston and a primary guide sleeve, the secondary motion assembly comprises a secondary piston, and the tertiary motion assembly comprises a tertiary cylinder cover, a tertiary guide sleeve I, a tertiary cylinder barrel and a tertiary guide sleeve II;
the three-stage cylinder cover is fixed on the left outer side of the three-stage cylinder barrel, the three-stage guide sleeve I is arranged in the three-stage cylinder barrel, the three-stage guide sleeve I and the three-stage cylinder cover are fixed through a fastening screw, and the three-stage guide sleeve II is fixed inside the right side of the three-stage cylinder barrel; the primary piston is sleeved between the tertiary cylinder barrel and the primary piston rod, the primary piston is positioned on the left side of the tertiary guide sleeve II, the primary guide sleeve is sleeved inside the primary piston rod, the primary piston rod penetrates through the tertiary guide sleeve II from the inside of the tertiary cylinder barrel and then extends out of the tertiary cylinder barrel, and the primary front end cover is fixed on the right side of the primary piston rod; the secondary piston is sleeved on the third-stage guide sleeve I and extends into the primary piston rod, and a stop block axially matched with the primary guide sleeve is arranged on the secondary piston positioned on the right side of the primary guide sleeve;
the third-stage cylinder barrel is provided with an oil port A, an oil port B and an oil port C, the oil port A is communicated with a rodless cavity of the oil cylinder, an E cavity is formed between the right side of the first-stage guide sleeve and the stop block, and the rodless cavity of the oil cylinder is communicated with the E cavity through an A1 oil duct between the first-stage guide sleeve and the second-stage piston; a cavity D is formed between the primary piston and the tertiary guide sleeve II, and the oil port B is communicated with the cavity D; an F cavity is formed between the secondary piston and the primary front end cover, a radial C1 oil duct and an axial C2 oil duct are arranged on the tertiary guide sleeve I, the C1 oil duct is communicated with the C2 oil duct, the C1 oil duct is communicated with the C oil port, and the C2 oil duct is communicated with the F cavity.
Furthermore, the primary piston rod, the primary piston and the primary guide sleeve are of an integral structure.
Furthermore, the primary front end cover is of a flange structure and is connected with the primary piston rod through a bolt.
Furthermore, the primary front end cover is of a cylindrical structure and is in threaded connection with the inner side wall of the primary piston rod; and the third-stage guide sleeve II is in threaded connection with the third-stage cylinder barrel.
Furthermore, the stop block is composed of a plurality of single blocks which are annularly and uniformly distributed around the outer circumference of the secondary piston.
Further, the stop block is a circular ring.
The invention has the beneficial effects that: the drill rod clamping oil cylinder is provided with three oil ports A, B, C, and when the oil port A is filled with high-pressure oil, the oil port A is used for clamping a stroke, so that the drill rod clamping function of the oil cylinder is realized. When the oil port C is communicated with high-pressure oil, the oil cylinder is guided to travel, and the function of guiding and opening the hole of the oil cylinder is achieved. Meanwhile, a stroke adjusting device is set so as to have the function of matching drill rods with different diameters. In addition, the operation of the guide stroke and the clamping stroke is not divided in sequence, and the action sequence is controllable, reliable and not disordered. All hydraulic fluid ports should all set up on tertiary cylinder, and tertiary cylinder and complete machine structure rigid connection can realize that the pipeline does not follow-up, reduce the pipeline damaged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the clamping stroke extension of the present invention;
FIG. 3 is a schematic illustration of the guide travel extension of the present invention;
in the figure, 1-1 parts of first-stage piston rods, 1-2 parts of first-stage front end covers, 1-3 parts of first-stage pistons, 1-4 parts of first-stage guide sleeves, 2-1 parts of second-stage pistons, 2-2 parts of stop blocks, 3-1 parts of third-stage cylinder covers, 3-2 parts of third-stage guide sleeves I, 3-3 parts of third-stage cylinder barrels, 3-4 parts of third-stage guide sleeves II, 3-5 parts of third-stage guide sleeves and fastening screws.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
As shown in fig. 1 to 3, the stroke-adjustable double-stroke single-stage double-acting drill rod clamping cylinder comprises a first-stage motion assembly, a second-stage motion assembly and a third-stage motion assembly, wherein the first-stage motion assembly comprises a first-stage piston rod 1-1, a first-stage front end cover 1-2, a first-stage piston 1-3 and a first-stage guide sleeve 1-4, the second-stage motion assembly comprises a second-stage piston 2-1, and the third-stage motion assembly comprises a third-stage cylinder cover 3-1, a third-stage guide sleeve I3-2, a third-stage cylinder barrel 3-3 and a third-stage guide sleeve II 3-4; the three-stage motion assembly forms an oil cylinder base, is fixed on a structural member of the whole machine through a flange and is static relative to the whole machine. The secondary motion assembly can axially slide relative to a tertiary guide sleeve I3-2 in the tertiary motion assembly. The primary motion assembly is capable of sliding over the secondary motion assembly and the tertiary motion assembly.
Specifically, as shown in fig. 1 to 3, a convex hole is formed in the tertiary cylinder barrel 3-3, the tertiary cylinder head 3-1 is fixed on the left outer side of the tertiary cylinder barrel 3-3 (i.e., the tertiary cylinder head 3-1 is fixed at the end of the tertiary cylinder barrel 3-3 with the smaller convex hole), the tertiary guide sleeve i 3-2 extends from the end of the tertiary cylinder barrel 3-3 with the smaller convex hole into the end of the tertiary cylinder barrel 3-3 with the larger convex hole, the tertiary guide sleeve i 3-2 is fixed with the tertiary cylinder head 3-1 through a fastening screw 3-5, and the stroke of the cylinder can be controlled by screwing the thread of the fastening screw 3-5 into the depth of the tertiary guide sleeve i 3-2. The third-stage guide sleeve II 3-4 is fixed inside the right side of the third-stage cylinder barrel 3-3 (namely the third-stage guide sleeve II 3-4 is fixed at one end of the third-stage cylinder barrel 3-3 with a larger convex hole). The primary piston 1-3 is sleeved between the tertiary cylinder barrel 3-3 and the primary piston rod 1-1, the primary piston 1-3 is located on the left side of the tertiary guide sleeve II 3-4, the primary guide sleeve 1-4 is sleeved inside the primary piston rod 1-1, the primary piston rod 1-1 penetrates through the tertiary guide sleeve II 3-4 from the inside of the tertiary cylinder barrel 3-3 and then extends out of the tertiary cylinder barrel 3-3, and the primary front end cover 1-2 is fixed on the right side of the primary piston rod 1-1. The primary front end cover 1-2 can be made into a flange connection mode and the like, and the primary front end cover 1-2 is connected with the primary piston rod 1-1 through bolts. Or as shown in fig. 1 to 3, the primary front end cover 1-2 is a cylindrical structure, and the primary front end cover 1-2 is in threaded connection with the inner side wall of the primary piston rod 1-1; and the third-stage guide sleeve II 3-4 is in threaded connection with the third-stage cylinder barrel 3-3. The secondary piston 2-1 is sleeved on the third-stage guide sleeve I3-2, the secondary piston 2-1 extends into the primary piston rod 1-1, and a stop block 2-2 axially matched with the primary guide sleeve 1-4 is arranged on the secondary piston 2-1 positioned on the right side of the primary guide sleeve 1-4;
as shown in fig. 1 to 3, the third-stage cylinder barrel 3-3 is provided with an oil port a, an oil port B and an oil port C, the oil port a leads to a rodless cavity of the oil cylinder, an E-cavity is formed by the first-stage guide sleeve 1-4, the stop block 2-2, the second-stage piston 2-1, the first-stage piston rod 1-1 and a corresponding sealing ring (the sealing ring is not marked), and the rodless cavity of the oil cylinder is communicated with the E-cavity through an a1 oil duct between the first-stage guide sleeve 1-4 and the second-stage piston 2-1. The first-stage piston rod 1-1, the first-stage piston 1-3, the third-stage cylinder barrel 3-3, the third-stage guide sleeve II 3-4 and a corresponding sealing ring (the sealing ring is not marked in the figure) form a cavity D, and the oil port B is communicated with the cavity D. An F cavity is formed by the primary piston rod 1-1, the secondary piston 2-1, the primary front end cover 1-2, the tertiary guide sleeve I3-2 and a corresponding sealing ring (the sealing ring is not marked in the drawing), the F cavity is divided into an F1 cavity located in the secondary piston 2-1 and an F2 cavity located in the primary piston rod 1-1, a radial C1 oil duct and an axial C2 oil duct are arranged on the tertiary guide sleeve I3-2, the C1 oil duct is communicated with the C2 oil duct, the C1 oil duct is communicated with a C oil port, and the C2 oil duct is communicated with the F cavity; a notch is formed in the third-stage guide sleeve I3-2 close to a C oil port of the third-stage cylinder barrel 3-3, a sealing ring (not marked in a sealing ring diagram) is arranged between the third-stage guide sleeve I3-2 and the third-stage cylinder barrel 3-3 on two sides of the notch, and therefore the communication between the C oil port and a C1 oil duct can be guaranteed when the third-stage guide sleeve I3-2 is adjusted through a fastening screw 3-5.
As a modification of this embodiment, the primary piston rod 1-1, the primary piston 1-3 and the primary guide sleeve 1-4 may be designed as a unitary structure.
Specifically, the stop 2-2 is composed of a plurality of single blocks annularly and uniformly distributed around the outer circumference of the secondary piston 2-1. Or the stopper 2-2 of the present application may have a circular ring structure. The stop block 2-2 is of a structure capable of axially limiting the primary motion assembly when the oil cylinder is clamped and extended.
The movement process of the invention is as follows:
first, extending process
1. Extended by the clamping stroke (as shown in fig. 2): the oil port A is connected with external high pressure, and the oil port B and the oil port C are both connected with external low pressure oil return. External high-pressure oil enters a rodless cavity of the oil cylinder from the oil port A, and the primary motion assembly is stressed to extend to the right side under the action of a corresponding sealing ring of the oil cylinder. High-pressure oil in the rodless cavity of the oil cylinder enters the cavity E through the oil duct A1, and the high-pressure oil entering the cavity E pushes the secondary piston 2-1 to drive the secondary motion assembly to extend outwards. And meanwhile, the hydraulic oil in the cavity D is discharged through the oil port B under the action of the right movement of the primary motion assembly. In the process that the secondary piston 2-1 moves towards the right, the volume of the F1 cavity is increased, and low-pressure hydraulic oil enters the F1 cavity through the C oil port and the C1 oil channel and the C2 oil channel to finish the oil supplementing process. The primary motion assembly extends until the right end face of the primary piston 1-3 contacts the left end face of the tertiary guide sleeve II 3-4, and the motion distance of the primary piston 1-3 is the clamping stroke S1.
2. Extended by a guide stroke (as shown in fig. 3): the oil port C is connected with external high pressure, the oil port A is connected with external low pressure return oil, and the oil port B is connected with a back pressure valve to form back pressure. External high-pressure oil enters from the oil port C, passes through the oil passage C1 and the oil passage C2, and enters the cavity F1 and the cavity F2. And hydraulic oil in the F2 cavity acts on the right end face of the secondary piston 2-1, and the secondary piston 2-1 is forced to move towards the left side until the secondary piston abuts against the third-stage guide sleeve I3-2. Then, the hydraulic oil in the F2 cavity acts on the left side of the primary front end cover 1-2, and the primary front end cover 1-2 is forced to drive the primary piston rod 1-1 to extend outwards. And hydraulic oil in the cavity D is discharged through the back pressure valve of the oil port B under the action of right movement of the primary motion assembly, so that a certain pressure is formed in the cavity D. And hydraulic oil in the cavity E flows out from the oil port A through the rodless cavity of the oil cylinder under the action of right movement of the primary motion assembly. The primary piston rod 1-1 is forced to extend outwards until the primary piston rod stops moving after contacting with the stop block 2-2, and the moving distance of the primary piston 1-3 is the guide stroke S2.
Second, retraction process
1. Cylinder clamping stroke retract (as shown in fig. 2): the oil port B is connected with external high pressure, and the oil port A and the oil port C are both connected with external low pressure oil return. External high-pressure oil enters the cavity D from the oil port B, and the high-pressure oil in the cavity D acts on the right end face of the primary piston 1-3 to drive the primary motion assembly to retract to the left. Meanwhile, the primary front end cover 1-2 is in contact with the secondary piston 2-1 to push the secondary motion assembly to retract to the left. And hydraulic oil in the rodless cavity of the oil cylinder flows out from the oil port A under the action of the retraction movement of the primary motion assembly and the secondary motion assembly to the left side. The first-stage motion assembly and the second-stage motion assembly retract to the left side until the left end face of the second-stage piston 2-1 is contacted with the inner step of the third-stage guide sleeve I3-2, and the retraction of the clamping stroke of the oil cylinder is completed.
2. Cylinder guide stroke retract (as shown in fig. 3): the oil port B is externally connected with high-pressure oil, and the oil port A and the oil port C are both externally connected with low-pressure oil return. External high-pressure oil enters the cavity D from the oil port B, and the high-pressure oil in the cavity D acts on the right end face of the primary piston 1-3 to drive the primary motion assembly to retract to the left. And hydraulic oil in the rodless cavity of the oil cylinder flows out from the oil port A. The primary motion assembly retracts to the left side until the left end face of the primary front end cover 1-2 is contacted with the right end face of the secondary piston 2-1, and the retraction of the guide stroke of the oil cylinder is finished.
Claims (6)
1. The utility model provides a double-stroke single-stage double-acting drill rod clamping cylinder of stroke adjustable which characterized in that: the device comprises a primary motion assembly, a secondary motion assembly and a tertiary motion assembly, wherein the primary motion assembly comprises a primary piston rod (1-1), a primary front end cover (1-2), a primary piston (1-3) and a primary guide sleeve (1-4), the secondary motion assembly comprises a secondary piston (2-1), and the tertiary motion assembly comprises a tertiary cylinder cover (3-1), a tertiary guide sleeve I (3-2), a tertiary cylinder barrel (3-3) and a tertiary guide sleeve II (3-4);
the three-stage cylinder cover (3-1) is fixed on the left outer side of the three-stage cylinder barrel (3-3), the three-stage guide sleeve I (3-2) is arranged in the three-stage cylinder barrel (3-3), the three-stage guide sleeve I (3-2) and the three-stage cylinder cover (3-1) are fixed through a fastening screw (3-5), and the three-stage guide sleeve II (3-4) is fixed inside the right side of the three-stage cylinder barrel (3-3); the primary piston (1-3) is sleeved between the tertiary cylinder barrel (3-3) and the primary piston rod (1-1), the primary piston (1-3) is located on the left side of the tertiary guide sleeve II (3-4), the primary guide sleeve (1-4) is sleeved inside the primary piston rod (1-1), the primary piston rod (1-1) penetrates through the tertiary guide sleeve II (3-4) from the inside of the tertiary cylinder barrel (3-3) and then extends out of the tertiary cylinder barrel (3-3), and the primary front end cover (1-2) is fixed on the right side of the primary piston rod (1-1); the secondary piston (2-1) is sleeved on the third-stage guide sleeve I (3-2), the secondary piston (2-1) extends into the primary piston rod (1-1), and a stop block (2-2) axially matched with the primary guide sleeve (1-4) is arranged on the secondary piston (2-1) on the right side of the primary guide sleeve (1-4);
the three-stage cylinder barrel (3-3) is provided with an oil port A, an oil port B and an oil port C, the oil port A is communicated with a rodless cavity of the oil cylinder, an E cavity is formed between the right side of the primary guide sleeve (1-4) and the stop block (2-2), and the rodless cavity of the oil cylinder is communicated with the E cavity through an oil duct A1 between the primary guide sleeve (1-4) and the secondary piston (2-1); a cavity D is formed between the primary piston (1-3) and the tertiary guide sleeve II (3-4), and the oil port B is communicated with the cavity D; an F cavity is formed between the secondary piston (2-1) and the primary front end cover (1-2), a radial C1 oil duct and an axial C2 oil duct are arranged on the tertiary guide sleeve I (3-2), the C1 oil duct is communicated with the C2 oil duct, the C1 oil duct is communicated with the C oil port, and the C2 oil duct is communicated with the F cavity.
2. The double-stroke single-stage double-acting drill rod clamping cylinder with the adjustable stroke as claimed in claim 1, characterized in that: the primary piston rod (1-1), the primary piston (1-3) and the primary guide sleeve (1-4) are of an integral structure.
3. The double-stroke single-stage double-acting drill rod clamping cylinder with the adjustable stroke as claimed in claim 1, characterized in that: the primary front end cover (1-2) is of a flange structure, and the primary front end cover (1-2) is connected with the primary piston rod (1-1) through bolts.
4. The double-stroke single-stage double-acting drill rod clamping cylinder with the adjustable stroke as claimed in claim 1, characterized in that: the primary front end cover (1-2) is of a cylindrical structure, and the primary front end cover (1-2) is in threaded connection with the inner side wall of the primary piston rod (1-1); and the third-stage guide sleeve II (3-4) is in threaded connection with the third-stage cylinder barrel (3-3).
5. The double-stroke single-stage double-acting drill rod clamping cylinder with the adjustable stroke as claimed in claim 1, characterized in that: the stop blocks (2-2) are composed of a plurality of single blocks which are annularly and uniformly distributed around the outer circumference of the secondary piston (2-1).
6. The double-stroke single-stage double-acting drill rod clamping cylinder with the adjustable stroke as claimed in claim 1, characterized in that: the stop block (2-2) is a circular ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110569792.4A CN113323943B (en) | 2021-05-25 | 2021-05-25 | Stroke-adjustable double-stroke single-stage double-acting drill rod clamping oil cylinder |
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| CN202110569792.4A CN113323943B (en) | 2021-05-25 | 2021-05-25 | Stroke-adjustable double-stroke single-stage double-acting drill rod clamping oil cylinder |
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| CN113323943A true CN113323943A (en) | 2021-08-31 |
| CN113323943B CN113323943B (en) | 2021-11-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114770025A (en) * | 2022-06-21 | 2022-07-22 | 四川航天长征装备制造有限公司 | Double-angle wedge sliding block piston ring |
| CN117536944B (en) * | 2023-12-12 | 2024-05-17 | 扬州市永发气动液压设备有限公司 | Compound motion multistage hydraulic cylinder |
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| JPH09303322A (en) * | 1996-05-08 | 1997-11-25 | Tokyo Shiyouketsu Kinzoku Kk | Constant velocity rising type multi-stage hydraulic cylinder |
| CN101629591A (en) * | 2009-06-30 | 2010-01-20 | 常州市瑞泰工程机械有限公司 | Pressurizing cylinder |
| CN101929486A (en) * | 2010-08-12 | 2010-12-29 | 湖州机床厂有限公司 | Composite oil cylinder |
| CN106969002A (en) * | 2017-04-10 | 2017-07-21 | 湖北工业大学 | Two-stage double-act-ing hydraulic J-Horner |
| CN107202046A (en) * | 2017-07-19 | 2017-09-26 | 上海同臣环保有限公司 | A kind of plunger combination oil cylinder with guide sleeve axle |
| CN112096691A (en) * | 2020-10-12 | 2020-12-18 | 深圳市恒拓高工业技术股份有限公司 | Primary and secondary double-stroke cylinder with guide rod |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114770025A (en) * | 2022-06-21 | 2022-07-22 | 四川航天长征装备制造有限公司 | Double-angle wedge sliding block piston ring |
| CN114770025B (en) * | 2022-06-21 | 2022-10-14 | 四川航天长征装备制造有限公司 | Double-angle wedge sliding block piston ring |
| CN117536944B (en) * | 2023-12-12 | 2024-05-17 | 扬州市永发气动液压设备有限公司 | Compound motion multistage hydraulic cylinder |
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