CN109093413B - Lever cylinder and workpiece clamping system - Google Patents
Lever cylinder and workpiece clamping system Download PDFInfo
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- CN109093413B CN109093413B CN201811146565.5A CN201811146565A CN109093413B CN 109093413 B CN109093413 B CN 109093413B CN 201811146565 A CN201811146565 A CN 201811146565A CN 109093413 B CN109093413 B CN 109093413B
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- 238000001514 detection method Methods 0.000 claims abstract description 85
- 239000003921 oil Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 239000010720 hydraulic oil Substances 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 description 18
- 238000009423 ventilation Methods 0.000 description 14
- 238000003754 machining Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/002—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring the holding action of work or tool holders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/04—Work clamping means using fluid means or a vacuum
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Jigs For Machine Tools (AREA)
- Gripping On Spindles (AREA)
Abstract
The invention relates to the technical field of workpiece processing equipment, in particular to a lever cylinder and a workpiece clamping system. In the lever cylinder, a clamping detection valve is arranged on the cylinder barrel, a protruding part is arranged on the piston rod, the clamping detection valve is abutted with the protruding part when clamping, and the first air passage on the cylinder barrel is blocked by the first cap; and a release detection valve is arranged on the cylinder bottom, and when the cylinder bottom is completely released, the release detection valve is abutted with the bottom of the piston rod, and the second air passage on the cylinder bottom is blocked by the second cover cap. The workpiece clamping system comprises the lever cylinder, and further comprises a first air pressure detector and a second air pressure detector; the first air pressure detector is used for detecting air pressure in the first air passage, and the second air pressure detector is used for detecting air pressure in the second air passage. The lever cylinder and the workpiece clamping system provided by the invention can be used for timely finding out when the workpiece is not clamped, and relieving the problem that the clamped workpiece is not machined well or a cutter is damaged due to the fact that the workpiece is not clamped.
Description
Technical Field
The invention relates to the technical field of workpiece processing equipment, in particular to a lever cylinder and a workpiece clamping system.
Background
In the actual production process of the workpiece, in order to facilitate processing and ensure processing precision, a lever cylinder is sometimes adopted to clamp the workpiece and then process the workpiece. The lever cylinder is generally provided with a cylinder barrel, a piston, a pressing plate and a connecting rod, the top of the piston is hinged with one end of the pressing plate, the two ends of the connecting rod are respectively hinged with the middle part of the pressing plate and the cylinder barrel, so that the cylinder barrel, the piston, the pressing plate and the connecting rod form a four-bar structure, the piston stretches out to push the pressing plate to press a workpiece, and the piston withdraws to drive the pressing plate to loosen the workpiece.
However, the existing lever cylinder has a relatively simple function, and when clamping cannot be performed due to workpiece clamping errors, piston rod damage, clamp plate looseness, clamp plate deformation or clamp point abrasion of the clamp plate, the problem that a clamped workpiece cannot be normally clamped and the clamped workpiece is easy to be damaged due to the fact that the clamped workpiece cannot be normally clamped cannot be timely found.
In summary, how to overcome the above-mentioned drawbacks of the existing lever cylinder is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a lever cylinder so as to solve the technical problem that the clamping failure of a workpiece cannot be found in time in the lever cylinder in the prior art.
The invention provides a lever cylinder which comprises a cylinder barrel, a cylinder bottom, a piston rod, a clamping detection valve, a loosening detection valve, a first cover cap and a second cover cap.
The upper part of the cylinder barrel is provided with a first mounting groove and a first air passage, and the clamping detection valve is arranged in the first mounting groove; one end of the clamping detection valve is connected with the bottom of the first mounting groove through an elastic structural member, the other end of the clamping detection valve is in butt joint with the piston rod, and a protruding part which can be in butt joint with the clamping detection valve when the lever cylinder is clamped is arranged on the periphery of the piston rod; the air inlet end of the first air passage is used for introducing air, the air outlet end of the first air passage is communicated with the outside, and the first cap is used for cutting off the first air passage when the clamping detection valve is abutted to the protruding portion.
The cylinder bottom is provided with a second mounting groove and a second air passage, and the relaxation detection valve is arranged in the second mounting groove; the second mounting groove is communicated with the cavity in the cylinder barrel, hydraulic oil in the cylinder barrel can push the relaxation detection valve to ascend, and the piston rod can push the relaxation detection valve to move downwards; the air inlet end of the second air channel is used for introducing air, the air outlet end of the second air channel is communicated with the outside, and the second cap is used for cutting off the second air channel when the piston rod descends to the bottommost end.
Preferably, as an implementation manner, the first cap is of an annular structure, and the first cap is sleeved on the periphery of the clamping detection valve and is fixedly connected with the clamping detection valve.
The groove wall of the first mounting groove is provided with a first annular groove, the groove wall of the first annular groove is provided with a first air hole, and the first annular groove and the first air hole are part of the first air passage; the first cap is located in the first annular groove, and the first cap is blocked on the first air hole when the lever cylinder is clamped.
Preferably, as an implementation manner, the second cap is of an annular structure, and the second cap is sleeved on the periphery of the relaxation detection valve and is fixedly connected with the relaxation detection valve.
A second annular groove is formed in the groove wall of the second mounting groove, a second air hole is formed in the groove wall of the second annular groove, and the second annular groove and the second air hole are part of the second air passage; the second cap is located in the second annular groove, and the second cap is blocked on the second air hole when the piston rod descends to the bottommost end.
Preferably, as an implementation manner, the loosening detection valve is provided with an oil hole penetrating from top to bottom, and hydraulic oil in the cavity of the cylinder barrel can enter the bottom of the second installation groove through the oil hole.
Preferably, as an implementation manner, the elastic structural member is a spring.
Preferably, as an implementation manner, a blind hole is formed at one end of the clamping detection valve, which is close to the bottom of the first mounting groove, and the spring is located in the blind hole.
Preferably, as an implementation manner, the protruding part on the piston rod is an annular protruding part, and the annular protruding part is coaxial with the piston rod.
Preferably, as an implementation manner, a plurality of first sealing rings are arranged between the clamping detection valve and the first mounting groove, and a plurality of second sealing rings are arranged between the loosening detection valve and the second mounting groove.
Correspondingly, the invention also provides a workpiece clamping system which comprises the lever cylinder, and further comprises a first air pressure detector and a second air pressure detector.
The first air pressure detector is arranged at the air inlet end of the first air passage and is used for detecting air pressure in the first air passage.
The second air pressure detector is arranged at the air inlet end of the second air passage and is used for detecting air pressure in the second air passage.
Preferably, as an implementation manner, the first air pressure detector is provided with a first clamping indicator light and a first loosening indicator light, and when the air pressure value detected by the first air pressure detector is greater than a preset threshold value, the first clamping indicator light is on, and the first loosening indicator light is off; when the air pressure value detected by the first clamping indicator lamp is smaller than a preset threshold value, the first clamping indicator lamp is turned off, and the first loosening indicator lamp is turned on.
The second air pressure detector is provided with a second clamping indicator lamp and a second loosening indicator lamp, and when the air pressure value detected by the second air pressure detector is greater than a preset threshold value, the second clamping indicator lamp is turned off, and the second loosening indicator lamp is turned on; and when the air pressure value detected by the second clamping indicator lamp is smaller than a preset threshold value, the second clamping indicator lamp is on, and the second loosening indicator lamp is off.
Compared with the prior art, the invention has the advantages that:
according to the lever cylinder provided by the invention, when the lever cylinder is in an initial state of complete relaxation, namely, the piston rod is propped against the relaxation detection valve and presses the relaxation detection valve to enable the relaxation detection valve to be at the lowest end, the first air passage is not blocked by the first cap, and the second air passage can be blocked by the second cap; when the lever cylinder starts to transition from the initial state of complete loosening to the middle state of clamping, namely the piston rod is separated from the loosening detection valve and the protruding part does not reach the position of clamping the detection valve, the first air passage is not blocked by the first cap, and the second air passage is not blocked by the second cap; when the lever cylinder is in a normal clamping state, namely the piston rod is separated from the loosening detection valve and the protruding part is propped against the clamping detection valve, the first air passage is blocked and clamped by the first cap, and the second air passage is not blocked by the second cap; when the workpiece is clamped incorrectly, the piston rod is damaged, the pressing plate is loosened, the pressing plate is deformed or the clamping point of the pressing plate is worn, namely, the protruding part on the piston rod continuously rises to separate from the clamping detection valve after being propped against the clamping detection valve, the first air passage is not blocked by the first cover cap, and the second air passage is not blocked by the second cover cap.
When the device is used, air is respectively introduced into the first air passage and the second air passage from the air inlet end of the first air passage and the air inlet end of the second air passage, the current state of the lever cylinder is judged by detecting the ventilation condition of the first air passage and the second air passage, and if the ventilation condition of the first air passage is normal and the second air passage is intercepted, the lever cylinder is judged to be in a completely relaxed state; if the second air passage is changed from the cut-off state to the ventilation state in the clamping process, judging that the lever cylinder is in the middle state; if the first air passage is cut off and the ventilation of the second air passage is normal, judging that the lever cylinder is in a normal clamping state; if the first air passage is changed from the cut-off state to the ventilation normal state in the clamping process, the first air passage is judged to be in fault states such as workpiece clamping errors, piston rod breakage, pressing plate looseness, pressing plate deformation or clamping point abrasion of the pressing plate, at the moment, a worker is required to check the clamping condition of the workpiece and the state of the lever cylinder so as to check the faults, and the problems of poor machining of the clamped workpiece or cutter breakage caused by poor workpiece clamping are solved.
Obviously, the lever cylinder provided by the invention can be timely found when the workpiece is not clamped, so that the problems of poor machining of the clamped workpiece or damage of a cutter caused by the fact that the workpiece is not clamped are solved.
The invention also provides a workpiece clamping system, which comprises the lever cylinder, a first air pressure detector arranged at the air inlet end of the first air passage and a second air pressure detector arranged at the air inlet end of the second air passage, wherein the first air pressure detector can detect the air pressure in the first air passage so as to detect the air pressure in the first air passage by using the first air pressure detector, when the first air passage is ventilated normally, the air pressure value detected by the first air pressure detector is lower, and when the first air passage is blocked, the air pressure value detected by the first air pressure detector is higher; similarly, the second air pressure detector can detect the air pressure in the second air passage, so that the second air pressure detector can detect the air pressure in the second air passage, when the second air passage is ventilated normally, the air pressure value detected by the second air pressure detector is lower, and when the second air passage is truncated, the air pressure value detected by the second air pressure detector is higher.
Obviously, the workpiece clamping system provided by the invention has all the advantages of the lever cylinder because the lever cylinder is included, so that the condition that the workpiece is not clamped can be timely known, and the problems of poor machining or cutter damage of the clamped workpiece caused by the fact that the workpiece is not clamped are alleviated; in addition, first air pressure detector and second air pressure detector can be as the instrument that detects first air flue and second air flue condition of ventilating, and the staff of being convenient for learn in time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, 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 perspective view of a lever cylinder according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an assembly structure of a cylinder barrel and a cylinder bottom of a lever cylinder according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a lever cylinder according to an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of the portion A in FIG. 3;
fig. 5 is an enlarged schematic view of the portion B in fig. 3.
Icon: 1-a cylinder barrel; 2-cylinder bottom; 3-a piston rod; 4-clamping the detection valve; 5-a relaxation detection valve; 6-a first cap; 7-a second cap; 8-a spring;
11-a first mounting groove; 12-a first annular groove;
21-a second mounting groove; 22-a second annular groove;
31-a projection;
41-blind holes; 42-a first sealing ring;
51-an oil hole; 52-second sealing ring.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention will now be described in further detail by way of specific examples of embodiments in connection with the accompanying drawings.
Example 1
Referring to fig. 1 to 5, a first embodiment provides a lever cylinder including a cylinder tube 1, a cylinder bottom 2, a piston rod 3, a clamp detection valve 4, a release detection valve 5, a first cap 6, and a second cap 7.
The upper part of the cylinder barrel 1 is provided with a first mounting groove 11 and a first air passage, and the clamping detection valve 4 is mounted in the first mounting groove 11; one end of the clamping detection valve 4 is connected with the bottom of the first mounting groove 11 through an elastic structural member, the other end of the clamping detection valve is in abutting connection with the piston rod 3, and a bulge 31 which can be in abutting connection with the clamping detection valve 4 when the lever cylinder is clamped is arranged on the periphery of the piston rod 3; the air inlet end of the first air passage is used for introducing air, the air outlet end of the first air passage is communicated with the outside, and the first cap 6 is used for cutting off the first air passage when the clamping detection valve 4 is abutted to the protruding portion 31.
The cylinder bottom 2 is provided with a second mounting groove 21 and a second air passage, and the relaxation detection valve 5 is arranged in the second mounting groove 21; the second mounting groove 21 is communicated with the cavity in the cylinder barrel 1, hydraulic oil in the cylinder barrel 1 can push the relaxation detection valve 5 to ascend, and the piston rod 3 can push the relaxation detection valve 5 to move downwards; the air inlet end of the second air passage is used for introducing air, the air outlet end of the second air passage is communicated with the outside, and the second cap 7 is used for cutting off the second air passage when the piston rod 3 descends to the bottommost end.
In the lever cylinder provided in the first embodiment, when the lever cylinder is in the initial state of being completely relaxed, that is, the piston rod 3 abuts against the relaxation detection valve 5 and presses the relaxation detection valve 5 to be at the lowest end, the first cap 6 does not intercept the first air passage, and the second cap 7 can intercept the second air passage; when the lever cylinder starts to transition from the initial state of complete relaxation to the clamped state, i.e. the piston rod 3 is disengaged from the relaxation detection valve 5 and the projection 31 is not in position to clamp the detection valve 4, the first cap 6 does not intercept the first air passage and the second cap 7 does not intercept the second air passage; when the lever cylinder is in a normal clamping state, i.e. the piston rod 3 is separated from the release detection valve 5 and the bulge 31 is abutted against the clamping detection valve 4, the first cap 6 cuts off the first air passage and the second cap 7 does not cut off the second air passage; when the workpiece is clamped erroneously, the piston rod 3 is broken, the pressing plate is loosened, the pressing plate is deformed, or the clamping point of the pressing plate is worn, that is, the protruding portion 31 on the piston rod 3 continues to rise after abutting against the clamping detection valve 4 to be separated from the clamping detection valve 4, the first cap 6 does not intercept the first air passage, and the second cap 7 does not intercept the second air passage.
When the device is used, air is respectively introduced into the first air passage and the second air passage from the air inlet end of the first air passage and the air inlet end of the second air passage, the current state of the lever cylinder is judged by detecting the ventilation condition of the first air passage and the second air passage, and if the ventilation condition of the first air passage is normal and the second air passage is intercepted, the lever cylinder is judged to be in a completely relaxed state; if the second air passage is changed from the cut-off state to the ventilation state in the clamping process, judging that the lever cylinder is in the middle state; if the first air passage is cut off and the ventilation of the second air passage is normal, judging that the lever cylinder is in a normal clamping state; if the first air passage is changed from the cut-off state to the ventilation normal state in the clamping process, the first air passage is judged to be in fault states such as workpiece clamping errors, breakage of the piston rod 3, looseness of the pressing plate, deformation of the pressing plate or abrasion of a clamping point of the pressing plate, and at the moment, a worker is required to check the clamping condition of the workpiece and the state of the lever cylinder so as to check the faults, and the problems of poor machining of the clamped workpiece or breakage of a cutter caused by poor workpiece clamping are solved.
Obviously, the lever cylinder provided by the first embodiment can be timely found when the workpiece is not clamped, so that the problem that the clamped workpiece is not machined well or a cutter is damaged due to the fact that the workpiece is not clamped is solved.
On the basis of the technical scheme, the scheme with the specific structure added is provided as follows, and the corresponding technical effect of each technical scheme is explained:
preferably, the first cap 6 may be provided in an annular structure, the first cap 6 is sleeved on the circumferential side of the clamping detection valve 4, and the first cap 6 is fixedly connected with the clamping detection valve 4, so that the first cap 6 can move synchronously with the clamping detection valve 4; a first annular groove 12 is formed on the groove wall of the first mounting groove 11, so that the first cap 6 can be accommodated in the first annular groove 12, and the first cap 6 can move in the first annular groove 12; the groove wall of the first annular groove 12 is provided with a first air hole, the first air hole and the first annular groove 12 are used as a part of the first air passage, and when the lever cylinder is clamped, the first cap 6 can be blocked on the first air hole, so that the first cap 6 can cut off the first air passage when the lever cylinder is clamped. The first cap 6 is provided in a ring-shaped structure, and can be blocked on the first air hole when the clamp detection valve 4 rotates.
Preferably, the second cap 7 may be provided in a ring structure, the second cap 7 is sleeved on the circumference of the release detection valve 5, and the second cap 7 is fixedly connected with the release detection valve 5, so that the second cap 7 can move synchronously with the release detection valve 5; a second annular groove 22 is formed in the groove wall of the second mounting groove 21, so that the second cap 7 can be accommodated in the second annular groove 22, and the second cap 7 can move in the second annular groove 22; the second air hole is formed in the groove wall of the second annular groove 22, the second air hole and the second annular groove 22 are used as a part of the second air passage, and when the lever cylinder is completely relaxed, namely the piston rod 3 is lowered to the lowest end, the second cover cap 7 can be blocked on the second air hole, so that the second cover cap 7 can cut off the second air passage when the lever cylinder is completely relaxed. The second cap 7 is provided in a ring-shaped structure, so that the second air hole can be blocked when the release detection valve 5 rotates.
Specifically, the release detection valve 5 is provided with the oil hole 51 which penetrates from top to bottom, so that hydraulic oil in the cavity of the cylinder barrel 1 can enter the base of the second installation groove 21 along the oil hole 51, and therefore when the oil pressure in the cylinder barrel 1 is high, the release detection valve 5 can move upwards under the action of the hydraulic oil, the second cap 7 can be separated from the second air hole under the action of the release detection valve 5, and the second air hole can be communicated with the second annular groove 22.
Preferably, the elastic structural member can be set as the spring 8, so that the manufacturing cost of the spring 8 is low, and the spring can be directly purchased, thereby saving the cost.
Further, a blind hole 41 is formed at one end of the clamping detection valve 4, which is close to the bottom of the first installation groove 11, so that the spring 8 can be placed into the blind hole 41, and therefore the spring 8 is limited by the blind hole 41, dislocation of the spring 8 is prevented, and deformation probability of the spring 8 is reduced.
Preferably, the protrusion 31 on the piston rod 3 is provided as an annular protrusion 31, and the annular protrusion 31 is coaxial with the piston rod 3, so that the protrusion 31 can also abut against the pinch detection valve 4 as well when the piston rod 3 rotates.
Further, the surface of the annular protrusion 31 may be provided as a rounded surface to reduce friction force between the annular protrusion 31 and the pinch detection valve 4, thereby reducing wear and extending the service life.
In a specific structure, a plurality of first sealing rings 42 are arranged between the clamping detection valve 4 and the first mounting groove 11 so that the first air holes can be isolated from the cavity in the cylinder barrel 1; a plurality of second sealing rings 52 are provided between the release detection valve 5 and the second mounting groove 21 so that the second air holes can be isolated from the oil holes 51 and the cavity in the cylinder tube 1.
Example two
Correspondingly, referring to fig. 1 to 5, a workpiece clamping system is provided in the second embodiment, which includes the lever cylinder (the specific structure of the lever cylinder is not repeated), and also includes the first air pressure detector and the second air pressure detector; the first air pressure detector is arranged at the air inlet end of the first air passage and is used for detecting air pressure in the first air passage; the second air pressure detector is arranged at the air inlet end of the second air passage and is used for detecting air pressure in the second air passage.
The first air pressure detector can detect air pressure in the first air passage, so that the air pressure in the first air passage is detected by the first air pressure detector, when the first air passage is ventilated normally, the air pressure value detected by the first air pressure detector is lower, and when the first air passage is cut off, the air pressure value detected by the first air pressure detector is higher; similarly, the second air pressure detector can detect the air pressure in the second air passage, so that the second air pressure detector can detect the air pressure in the second air passage, when the second air passage is ventilated normally, the air pressure value detected by the second air pressure detector is lower, and when the second air passage is truncated, the air pressure value detected by the second air pressure detector is higher.
Obviously, the workpiece clamping system provided by the second embodiment has all the advantages of the lever cylinder in the first embodiment because the lever cylinder in the first embodiment is included, so that the condition that the workpiece is not clamped can be timely known, and the problems of poor machining or cutter breakage of the clamped workpiece caused by the fact that the workpiece is not clamped are solved; in addition, first air pressure detector and second air pressure detector can be as the instrument that detects first air flue and second air flue condition of ventilating, and the staff of being convenient for learn in time.
Preferably, a first clamping indicator light and a first loosening indicator light can be arranged on the first air pressure detector, the first clamping indicator light is set to be on when the air pressure value detected by the first air pressure detector is larger than a preset threshold value, and the first clamping indicator light is set to be off when the air pressure value detected by the first air pressure detector is smaller than the preset threshold value; the first relaxation indicator lamp is set to be turned off when the air pressure value detected by the first air pressure detector is larger than a preset threshold value, and is turned on when the air pressure value detected by the first air pressure detector is smaller than the preset threshold value, namely the ventilation state of the first air passage is judged by utilizing the on-off conditions of the first relaxation indicator lamp and the first clamping indicator lamp, so that the ventilation state of the first air passage is quite visual.
Setting a second clamping indicator lamp and a second loosening indicator lamp on the second air pressure detector, wherein the second clamping indicator lamp is set to be turned off when the air pressure value detected by the second air pressure detector is larger than a preset threshold value, and turned on when the air pressure value detected by the second air pressure detector is smaller than the preset threshold value; the second relaxation indicator lamp is set to be on when the air pressure value detected by the second air pressure detector is larger than a preset threshold value, and is off when the air pressure value detected by the second air pressure detector is smaller than the preset threshold value, namely the ventilation state of the second air passage is judged by utilizing the on-off conditions of the second relaxation indicator lamp and the second clamping indicator lamp, so that the ventilation state of the second air passage is quite visual.
In summary, the embodiment of the invention discloses a lever cylinder and a workpiece clamping system, which overcome a plurality of technical defects of the traditional lever cylinder. The lever cylinder and the workpiece clamping system provided by the embodiment of the invention can be timely found when the workpiece is not clamped, so that the problem that the clamped workpiece is not machined well or a cutter is damaged due to the fact that the workpiece is not clamped is solved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention 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 or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The lever cylinder is characterized by comprising a cylinder barrel, a cylinder bottom, a piston rod, a clamping detection valve, a loosening detection valve, a first cover cap and a second cover cap;
the upper part of the cylinder barrel is provided with a first mounting groove and a first air passage, and the clamping detection valve is arranged in the first mounting groove; one end of the clamping detection valve is connected with the bottom of the first mounting groove through an elastic structural member, the other end of the clamping detection valve is in butt joint with the piston rod, and a protruding part which can be in butt joint with the clamping detection valve when the lever cylinder is clamped is arranged on the periphery of the piston rod; the air inlet end of the first air passage is used for introducing air, the air outlet end of the first air passage is communicated with the outside, and the first cover cap is used for cutting off the first air passage when the clamping detection valve is abutted against the protruding part;
the cylinder bottom is provided with a second mounting groove and a second air passage, and the relaxation detection valve is arranged in the second mounting groove; the second mounting groove is communicated with the cavity in the cylinder barrel, hydraulic oil in the cylinder barrel can push the relaxation detection valve to ascend, and the piston rod can push the relaxation detection valve to move downwards; the air inlet end of the second air channel is used for introducing air, the air outlet end of the second air channel is communicated with the outside, and the second cap is used for cutting off the second air channel when the piston rod descends to the bottommost end;
the first cap is of an annular structure, and is sleeved on the periphery of the clamping detection valve and fixedly connected with the clamping detection valve;
the groove wall of the first mounting groove is provided with a first annular groove, the groove wall of the first annular groove is provided with a first air hole, and the first annular groove and the first air hole are part of the first air passage; the first cap is positioned in the first annular groove, and the first cap is blocked on the first air hole when the lever cylinder is clamped;
the second cap is of an annular structure, and is sleeved on the periphery of the relaxation detection valve and fixedly connected with the relaxation detection valve;
a second annular groove is formed in the groove wall of the second mounting groove, a second air hole is formed in the groove wall of the second annular groove, and the second annular groove and the second air hole are part of the second air passage; the second cap is located in the second annular groove, and the second cap is blocked on the second air hole when the piston rod descends to the bottommost end.
2. The lever cylinder according to claim 1, wherein the release detection valve is provided with an oil hole penetrating from top to bottom, and hydraulic oil in the cavity of the cylinder tube can enter the bottom of the second mounting groove through the oil hole.
3. A lever cylinder according to claim 1 or 2, characterized in that the elastic structural member is a spring.
4. A lever cylinder as claimed in claim 3, wherein the clamp detection valve is provided with a blind hole at one end thereof adjacent to the bottom of the first mounting groove, and the spring is located in the blind hole.
5. A lever cylinder as claimed in claim 1 or 2, wherein the projection on the piston rod is an annular projection, and the annular projection is coaxial with the piston rod.
6. A lever cylinder according to claim 1 or 2, characterized in that a plurality of first sealing rings are arranged between the clamping detection valve and the first mounting groove, and a plurality of second sealing rings are arranged between the loosening detection valve and the second mounting groove.
7. A workpiece clamping system comprising a lever cylinder as recited in any one of claims 1-6, further comprising a first air pressure detector and a second air pressure detector;
the first air pressure detector is arranged at the air inlet end of the first air passage and is used for detecting air pressure in the first air passage;
the second air pressure detector is arranged at the air inlet end of the second air passage and is used for detecting air pressure in the second air passage.
8. The workpiece clamping system of claim 7, wherein a first clamping indicator light and a first loosening indicator light are arranged on the first air pressure detector, and the first clamping indicator light is on and the first loosening indicator light is off when the air pressure value detected by the first air pressure detector is greater than a preset threshold value; when the air pressure value detected by the first clamping indicator lamp is smaller than a preset threshold value, the first clamping indicator lamp is turned off, and the first loosening indicator lamp is turned on;
the second air pressure detector is provided with a second clamping indicator lamp and a second loosening indicator lamp, and when the air pressure value detected by the second air pressure detector is greater than a preset threshold value, the second clamping indicator lamp is turned off, and the second loosening indicator lamp is turned on; and when the air pressure value detected by the second clamping indicator lamp is smaller than a preset threshold value, the second clamping indicator lamp is on, and the second loosening indicator lamp is off.
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| CN201811146565.5A CN109093413B (en) | 2018-09-28 | 2018-09-28 | Lever cylinder and workpiece clamping system |
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| CN201811146565.5A CN109093413B (en) | 2018-09-28 | 2018-09-28 | Lever cylinder and workpiece clamping system |
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| CN109093413B true CN109093413B (en) | 2023-08-08 |
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| CN113027865B (en) * | 2021-04-20 | 2022-05-03 | 无锡贝斯特精机股份有限公司 | Linear oil cylinder action detection device |
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| CN109093413A (en) | 2018-12-28 |
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