CN215919823U - Unpowered suction cup - Google Patents

Abstract

The utility model discloses an unpowered sucker, and relates to the technical field of suckers; the method comprises the following steps: the device comprises an upper cover, a traction device, a switching device, a sucker operation device and a cylinder body; the traction device is fixed on the upper cover, and the bottom of the traction device is connected with a switching device; the bottom of the upper cover is connected with a cylinder body; a sucker operation device is arranged in the cylinder body; the switching device is used for switching the state of the sucker operation device; the switching device can be pulled by the traction device, so that the switching device is rotated and switched, the on-off of the cutting edge of the reversing valve is controlled, the negative pressure chamber of the sucker is opened or closed to realize the adsorption and release of objects by the sucker, the sucker is separated from the control of electric power or magnetic force, the operation of the unpowered sucker is realized, the capability of a factory for coping with accidents is improved, and the working efficiency of the sucker is guaranteed.

Description

Unpowered suction cup

Technical Field

The utility model relates to the technical field of suckers, in particular to an unpowered sucker.

Background

Suction cups are machine tool accessories that use suction to hold a workpiece. The most common suction cup used today is a magnetic suction cup, typically rectangular or disc shaped. It uses magnetic force to suck ferromagnetic work piece tightly, and is used for surface grinder, milling machine and lathe, numerically-controlled machine tool and machining center, etc.

In the electromagnetic chuck, a plurality of groups of coils are arranged in the electromagnetic chuck, direct current is introduced to generate a magnetic field, and the magnetic field passes through a magnetic conduction panel to tightly suck a workpiece contacted with the surface of the panel; the power supply is cut off, the magnetic force disappears, demagnetization is realized, the workpiece is loosened, and in the sucker, once the circuit fault occurs, the sucker cannot be used, so that field work cannot be unfolded according to an original plan, and the efficiency of workers is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a non-powered suction cup that solves the problems set forth above in the background.

In order to solve the technical problems, the utility model provides the following technical scheme: unpowered suction cup, include:

the device comprises an upper cover, a traction device, a switching device, a sucker operation device and a cylinder body;

the traction device is fixed on the upper cover, and the bottom of the traction device is connected with a switching device; the bottom of the upper cover is connected with a cylinder body; a sucker operation device is arranged in the cylinder body; the switching device is used for switching the state of the sucker operation device;

preferably, the traction device comprises: the lifting ring, the chain, the pulley, the chain link, the wheel shaft and the pulley clamp plate;

the two ends of the top of the upper cover are provided with first small holes, grooves are formed in the first small holes, and the wheel shaft penetrates through the first small holes to fix the chain links in the grooves;

one end of the chain is connected with the chain link, and the other end of the chain is connected to the lifting ring through the pulley; the pulley is fixed on the pulley clamping plate through a wheel shaft;

the pulley clamping plate is in an inverted triangle shape, and pulleys are arranged at two ends of the top of the pulley clamping plate; the bottom corner is provided with a second small hole.

Preferably, the switching device includes: a piston rod, a switcher, and a switcher connecting rod;

the piston rod includes:

the connecting hole is formed in the upper end of the piston rod;

the piston rod connecting shaft penetrates through the second small hole and the connecting hole, and the piston rod is fixed on the pulley clamping plate;

the first positioning hole is formed in the piston rod and located below the connecting hole.

The switch includes:

the second positioning hole is formed in the switcher;

the fixing pin penetrates through the first positioning hole and is inserted into the second positioning hole to fix the piston rod and the switcher;

preferably, the switch further comprises: the upper sawteeth are positioned at the upper end of the switcher, and an upper slideway is formed between every two adjacent upper sawteeth;

the upper slide ways comprise long slide ways and short slide ways, and every two adjacent upper slide ways are alternately arranged by the long slide ways and the short slide ways; the distance difference of the stroke of the floating plate of the switcher below is ensured when the limiting device rotates each time, and the cutting edge of the reversing valve is further controlled;

a lower serration at a lower end of the switcher; a lower slideway is formed between every two adjacent lower sawteeth;

the upper slideway is not communicated with the lower slideway;

any upper saw tooth and any lower saw tooth are not in the same vertical plane.

Preferably, the direction of the inclined surface of the upper slideway is opposite to that of the inclined surface of the lower slideway;

the switcher link slides inside the switcher;

the switcher link includes:

the switcher floating plate is positioned at the lower end of the switcher connecting rod;

the switcher sealing plate is sealed at the bottom of the switcher floating plate;

the connecting piece is used for connecting the switcher floating plate with the lower end of the switcher connecting rod;

the limiting devices are fixed at the upper end and the lower end of the switcher connecting rod and limit the switcher connecting rod; the limiting devices are fixed at the upper end and the lower end of the switcher connecting rod to form an upper fixing point and a lower fixing point; the distance between the upper fixing point and the lower fixing point is equal to the vertical distance from any upper saw tooth to any lower saw tooth.

The gravity device is arranged at the top end of the switcher connecting rod and is used for providing certain gravity to facilitate the switcher connecting rod to fall;

the suction cup working device includes: a piston, a piston inner barrel and an upper guide sleeve;

an upper guide sleeve is arranged in the piston, an inner piston barrel is arranged in the upper guide sleeve, and a first connecting part is arranged at the center of the bottom of the piston;

the center of the piston inner barrel is provided with a hole for allowing a piston rod to be inserted;

the switching device further includes: a cutting edge of the reversing valve and a lifting limiting sleeve;

the cutting edge of the reversing valve is fixed at the center of the connecting part;

the lifting limiting sleeve is fixed on the first connecting part;

the cutting edge of the reversing valve comprises an inner caliber and an outer caliber; the bottom surface of the sealing sheet of the switcher completely covers the inner caliber, and does not exceed the outer caliber; so as to ensure that the switcher can be completely sealed when the cutting edge of the reversing valve is pressed;

the lifting limiting sleeve is provided with a first groove, and the first groove is used for limiting the switcher floating plate so as to ensure that the switcher floating plate is not pulled out of the lifting limiting sleeve;

the upper cover is provided with a positive pressure gauge, a protective cover is arranged outside the positive pressure gauge, and the upper cover is also provided with a one-way valve;

the traction device also comprises a piston cavity diaphragm which sequentially comprises from outside to inside,

a second connecting part fixed between the bottom of the upper cover and the cylinder body,

an upper end closed cavity formed by covering the inner wall of the cylinder body, the upper surface of the piston wall and the outer wall of the upper guide sleeve,

a third connecting part fixed between the bottom of the upper cover and the upper guide sleeve,

a dust cover covering the inner part of the upper guide sleeve,

a connecting part IV fixed at the upper end of the piston rod,

a through hole passing through the piston rod,

the bottom of the diaphragm of the piston cavity is hermetically connected with the piston, a gasket is arranged at the joint, and the upper-end closed cavity is connected with the one-way valve.

The check valve is communicated with the upper end closed chamber, when in a natural state, the check valve is in a closed state, when the piston moves upwards, the upper end closed chamber forms compressed air, the check valve is in a closed state, so that a buffer effect is provided for the upward movement of the piston, when the piston moves downwards, the internal pressure intensity of the upper end closed chamber is gradually reduced, a critical point is generated along with the continuous reduction of the internal pressure intensity, when the internal pressure intensity reaches a certain critical value, the lower pressure of the check valve is equal to the upper part, when the internal pressure intensity is smaller than the critical value, the lower pressure of the check valve is smaller than the upper part, the check valve realizes one-way air inlet, when in an open state, the air is continuously sucked, so that a buffer effect is provided for the downward movement of the piston, the check valve also provides a manual device, the upper end closed chamber can be communicated with the outside after being pressed down, and the air can be conveniently fed and discharged, the operation is more flexible and convenient.

Be provided with the negative pressure table on the cylinder body, the bottom is provided with the sucking disc clamp, the negative pressure table is provided with negative pressure table guard shield outward, the sucking disc clamp is used for the chucking sucking disc.

The piston cavity diaphragm is made of nitrile rubber, so a gasket is arranged when the piston cavity diaphragm is fixedly connected with the piston;

the piston rod firstly penetrates through a diaphragm of the piston cavity, then penetrates through the inner barrel of the piston and then penetrates through the lifting limiting sleeve, so that the sealing sheet of the switcher at the bottom can contact with the cutting edge of the reversing valve at the bottom of the sucker, when the lifting device is lifted above the piston, the chain drives the pulley clamping plate and further drives the piston rod to move, the piston rod drives the lifting limiting sleeve, further drives the inner barrel of the piston and the piston to move, and in the process of moving, the switching device is switched, so that the difference of movement distance of the floating plate of the switcher at the bottom of the piston rod occurs, the on-off of the cutting edge of the reversing valve is controlled, and finally the unpowered control of the sucker is realized.

Compared with the prior art, the utility model has the following beneficial effects: according to the unpowered sucker disclosed by the utility model, the switching device is lifted by the traction device, the upper saw teeth and the lower saw teeth are arranged on the switcher, the direction of the cross section formed by the upper saw teeth and the lower saw teeth is opposite, and the scheme that the limiting device on the connecting rod of the switcher slides on the cross section is utilized, so that different height differences are generated in the movement process of the sealing sheet of the switcher, the on-off state of the vacuum switching valve can be controlled, the sucker is enabled to adsorb and release objects by opening or closing the negative pressure chamber of the sucker through the valve, the sucker is enabled to be separated from the power control of electric power or magnetic force, the unpowered sucker is enabled to operate, the capability of a factory for coping with unexpected situations is improved, and the working efficiency of the sucker is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a front view of an unpowered suction cup in an embodiment of the utility model;

FIG. 2 is a schematic diagram of the overall structure of an unpowered suction cup in an embodiment of the utility model;

FIG. 3 is a schematic diagram of a pulley clamp plate structure of an unpowered suction cup according to an embodiment of the utility model;

FIG. 4 is a schematic diagram of the cutting edge configuration of the diverter valve without the power suction cup in the embodiment of the present invention;

FIG. 5 is a schematic diagram of the structure of a lifting stop collar of the unpowered suction cup in the embodiment of the utility model;

FIG. 6 is a schematic diagram of a switch structure without power suction cups according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of the switching device of the unpowered suction cup in the embodiment of the present invention;

FIG. 8 is a schematic diagram of the construction of the diverter float plate and diverter sealing plate without the suction cups in an embodiment of the present invention;

FIG. 9 is a schematic illustration of the internal structure of the piston of the unpowered suction cup in an embodiment of the utility model;

FIG. 10 is a cross-sectional view of a piston chamber diaphragm of an unpowered suction cup in an embodiment of the utility model;

FIG. 11 is a top view of a piston chamber diaphragm of an unpowered suction cup in an embodiment of the utility model;

FIG. 12 is a schematic view of the bottom structure of the upper cover of the unpowered suction cup in the embodiment of the utility model;

FIG. 13 is a schematic view of a suction cup clamp configuration for a non-powered suction cup in an embodiment of the present invention;

in the figure: 1. a hoisting ring; 2. a chain; 3. an upper cover; 4. a shield; 5. a positive pressure gauge; 6. a one-way valve; 7. a pulley; 8. a chain link; 9. a negative pressure gauge; 10. a cylinder body; 11. a negative pressure gauge shield; 12. a wheel axle; 13. a first aperture; 14. a pulley clamp plate; 15. A piston rod; 16. connecting holes; 17. a first positioning hole; 18. a switch; 19. a second positioning hole; 20. a switcher link; 21. a switcher float plate; 22. a switcher sealing sheet; 23. a limiting device; 24. a gravity device; 25. a second aperture; 26. The piston rod is connected with the shaft; 27. a piston; 28. an inner piston barrel; 29. a sucker hoop; 30. a piston cavity diaphragm; 31. a cutting edge of the reversing valve; 32. a lifting limit sleeve; 33. an upper guide sleeve; 34. a first connecting part; 35. a place where the cutting edge of the reversing valve is arranged; 36. fixing points of the inner cylinder of the piston; 37. fixing points of the lifting limiting sleeve; 38. the upper guide sleeve stays at the position when the piston moves; 39. a through hole; 40. a gasket; 41. the upper end is sealed; 42. the upper edge of the diaphragm of the piston cavity is fixed with the upper cover; 43. the diaphragm of the piston cavity is fixed with the upper guide sleeve; 44. the fixed point of the piston cavity diaphragm and the piston; 45. the upper cover is fixed with the cylinder body; 46. a one-way valve fixing part; 47. a positive gauge fixing part;

311. the inner diameter; 312. the outer diameter;

321. a first groove;

1801. upper saw teeth; 1802. a lower sawtooth; 1803. a short slideway; 1804. a long slideway; 1805. a lower chute.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): this embodiment provides a best solution for the unpowered suction cup of the present invention, as shown in fig. 1-9, the unpowered suction cup includes: the upper cover 3, the traction device, the switching device, the sucker operation device and the cylinder body 10;

the traction device is fixed on the upper cover 3, and the bottom of the traction device is connected with a switching device; the bottom of the upper cover 3 is connected with a cylinder body 10; a sucker operation device is arranged in the cylinder body 10; the switching device is used for switching the state of the sucker operation device;

the traction device comprises: the lifting ring 1, the chain 2, the pulley 7, the chain link 8, the wheel shaft 12 and the pulley clamp plate 14;

two ends of the top of the upper cover 3 are provided with first small holes 13, grooves are formed in the first small holes 13, and the wheel shaft 12 penetrates through the first small holes 13 to fix the chain links 8 in the grooves;

one end of the chain 2 is connected with the chain link 8, and the other end of the chain is connected to the hanging ring 1 through the pulley 7; the pulley 7 is fixed on a pulley clamping plate 14 through a wheel shaft 12;

the pulley clamping plate 14 is in an inverted triangle shape, and pulleys 7 are arranged at two ends of the top of the pulley clamping plate; the bottom corner is provided with a second small hole 25.

The switching device includes: a piston rod 15, a switch 18, a switch link 20;

the piston rod 15 includes:

the connecting hole 16 is formed in the upper end of the piston rod 15;

the piston rod connecting shaft 26 penetrates through the second small hole 25 and the connecting hole 16, and the piston rod 15 is fixed on the pulley clamping plate 14;

the first positioning hole 17 is formed in the piston rod 15, and the first positioning hole 17 is located below the connecting hole 16.

The switch 18 includes:

a second positioning hole 19, wherein the second positioning hole 19 is opened on the switcher 18;

a fixing pin inserted into the second positioning hole 19 through the first positioning hole 17 to fix the piston rod 15 and the switch 18;

the switch 18 further includes:

the upper saw teeth 1801 are positioned at the upper end of the switcher 18, and an upper slideway is formed between every two adjacent upper saw teeth 1801;

the upper slide ways comprise long slide ways 1804 and short slide ways 1803, and each two adjacent upper slide ways are formed by alternately arranging the long slide ways 1804 and the short slide ways 1803;

a lower tine 1802, said lower tine 1802 located at a lower end of the switch 18; a lower slideway 1805 is formed between every two adjacent lower teeth 1802;

any of the upper serrations 1801 is not in the same vertical plane as any of the lower serrations 1802; a first inclined plane is arranged at the top end of one side of the upper slideway, a second inclined plane is arranged at the bottom end of one side of the lower slideway 1805, and the inclination directions of the first inclined plane and the second inclined plane are opposite;

the switch link 20 slides inside the switch 18;

the switcher link 20 includes:

a switcher float plate 21, the switcher float plate 21 being located at a lower end of the switcher link 20;

a switch sealing sheet 22, the switch sealing sheet 22 being sealed to a bottom of the switch floating plate 21;

a link for connecting the switcher floating plate 21 and the lower end of the switcher link 20;

the limiting devices 23 are fixed at the upper end and the lower end of the switcher connecting rod 20 to form an upper fixed point and a lower fixed point; the limiting devices 23 are two limiting rods, penetrate through the upper end and the lower end of the switcher connecting rod 20,

the distance between the upper fixing point and the lower fixing point is equal to the vertical distance from any upper saw tooth to any lower saw tooth.

A gravity device 24, wherein the gravity device 24 is disposed on the top end of the switcher link 20, the gravity device 24 is a link nut, the top end of the switcher link 20 is configured in a threaded shape, and the link nut can be screwed on the top end of the switcher link 20;

the lower end of the switcher connecting rod 20 is provided with a thin rod connected with a bulge;

the switcher floating plate 21 is a combination of concentric cylinders, the lower end of the switcher floating plate is a large cylinder, a concentric small cylinder is arranged above the large cylinder, the small cylinder is a hollow cylinder, 4 inclined plane holes are formed in the periphery of the small cylinder, and the small cylinder can just put down a bulge at the bottom of the switcher connecting rod 20;

the connecting piece is composed of two U-shaped pipe clamp springs, one end of the first U-shaped pipe clamp spring penetrates through the inclined plane hole, and the other end penetrates out of the other inclined plane hole; the other one penetrates into and penetrates out of the other two inclined plane holes; the two U-shaped pipe clamp springs are overlapped above the bulges and are tightened to lock the thin rod;

the suction cup working device includes: a piston 27, a piston inner barrel 28 and an upper guide sleeve 33;

an upper guide sleeve 33 is arranged in the piston 27, a piston inner barrel 28 is arranged in the upper guide sleeve 33, and a first connecting part 34 is arranged at the center of the bottom of the piston 27;

the piston inner barrel 28 is provided with a hole in the center and can allow the piston rod 15 to be inserted;

the switching device further includes: a cutting edge 31 of the reversing valve and a lifting limit sleeve 32;

the cutting edge 31 of the reversing valve is fixed at the center of the first connecting part 34;

the lifting limiting sleeve 32 is fixed on the first connecting part 34;

the cutting edge 31 of the reversing valve comprises an inner caliber 311 and an outer caliber 312; the bottom surface of the switch sealing sheet 22 completely covers the inner caliber 311, and the bottom surface of the switch sealing sheet 22 does not exceed the outer caliber 312; to ensure that the diverter 18 is fully sealed when the diverter valve edge 31 is compressed;

the lifting limiting sleeve 32 is provided with a first groove 321, and the first groove 321 is used for limiting the switcher floating plate 21 so as to ensure that the switcher floating plate 21 is not pulled out of the lifting limiting sleeve 32;

a positive pressure gauge 5 is arranged on the upper cover 3, a protective cover 4 is arranged outside the positive pressure gauge 5, and a one-way valve 6 is also arranged on the upper cover 3;

the traction device also comprises a piston cavity diaphragm 30 which sequentially comprises from outside to inside,

a second connecting part fixed between the bottom of the upper cover 3 and the cylinder body 10,

an upper end closed chamber 41 formed to cover the inner wall of the cylinder 10, the upper surface of the wall of the piston 27 and the outer wall of the upper guide sleeve 33,

a third connecting part fixed between the bottom of the upper cover 3 and the upper guide sleeve 33,

a dust cover covering the inside of the upper guide sleeve 33, the dust cover having wrinkles,

a connecting part IV fixed at the upper end of the piston rod 15, so that the piston rod 15 can move up and down with the dust cover through the connecting part IV,

a through hole 39 passing through said piston rod 15,

the bottom of the piston cavity diaphragm 30 is hermetically connected with the piston 27, a gasket 40 is arranged at the joint, and the upper-end closed chamber 41 is connected with the one-way valve 6.

Be provided with negative pressure table 9 on the cylinder body 10, the bottom is provided with sucking disc clamp 29, negative pressure table 9 is provided with negative pressure table guard shield 11 outward, sucking disc clamp 29 is used for the chucking sucking disc.

The working principle of the utility model is as follows: the power mechanism is arranged to provide power for the lifting ring 1, the lifting ring 1 is connected with the chain 2, the suction and release of the suction cup are controlled by the tightness of the chain 2, when the chain 2 is loose, the pulley clamping plate 14 drives the piston rod 15 and the switcher 18 on the piston rod 15 to move downwards, the switcher connecting rod 20 descends by means of gravity, the switcher sealing plate 22 at the bottom of the switcher connecting rod 20 moves downwards and contacts with the reversing valve cutting edge 31, the switcher connecting rod 20 rotates, at the moment, the chain 2 is lifted upwards, if the upper limiting device of the switcher connecting rod 20 is clamped in the long slide 1804, the switcher sealing plate 22 is sealed with the reversing valve cutting edge 31, and the suction cup is in a suction state; if the upper limiting device of the switcher connecting rod 20 is clamped in the short slideway 1803, a certain distance exists between the switcher sealing sheet 22 and the reversing valve cutting edge 31, and the suction cup is in a release state;

the working principle of the sucker in the application is that a piston 27 exists in a cylinder body 10, an upper guide sleeve 33 is sleeved in the piston 27, an inner piston barrel 28 is arranged in the upper guide sleeve 33, a lifting limiting sleeve 32 is arranged in the inner piston barrel 28, a piston cavity diaphragm 30 is sleeved outside the upper guide sleeve, and the upper edge of the piston cavity diaphragm 30 is fixed at the bottom of an upper cover 3; the upper guide sleeve 33 is fixed at the bottom of the upper cover 3, the piston rod 15 firstly passes through the piston cavity diaphragm 30 and then passes through the inner piston barrel 28, and then passes through the lifting limit sleeve 32, so that the switch sealing sheet 22 at the bottom can contact the cutting edge 31 of the reversing valve at the bottom of the sucker, when the lifting device is lifted at the upper part, the chain 2 drives the pulley clamping plate 14 and then drives the piston rod 15 to move, the piston rod 15 drives the lifting limit sleeve 32 and then drives the inner piston barrel 28 and the piston 27 to move, in the moving process, the piston 27 enters and exits the upper end closed chamber 41, the gas in the upper end closed chamber 41 provides buffer for the piston 27, and the switching device switches while moving, so that the floating plate 21 of the switch at the bottom of the piston rod 15 has a movement distance difference, and then controls the on-off of the cutting edge 31 of the reversing valve, therefore, the negative pressure chamber of the sucker can be opened or closed, so that the suction cup can suck or release an object.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. Unpowered suction cup, its characterized in that includes: an upper cover (3), a traction device, a switching device, a sucker operation device and a cylinder body (10);

the traction device is fixed on the upper cover (3), and the bottom of the traction device is connected with a switching device; the bottom of the upper cover (3) is connected with a cylinder body (10); a sucker operation device is arranged in the cylinder body (10); the switching device is used for switching the state of the sucker operation device.

2. The unpowered suction cup of claim 1 wherein the traction device comprises: the device comprises a lifting ring (1), a chain (2), a pulley (7), a chain link (8), a wheel shaft (12) and a pulley clamping plate (14);

the two ends of the top of the upper cover (3) are provided with first small holes (13), grooves are formed in the first small holes (13), and the wheel shaft (12) penetrates through the first small holes (13) to fix the chain links (8) in the grooves;

one end of the chain (2) is connected with the chain link (8), and the other end of the chain is connected to the lifting ring (1) through the pulley (7); the pulley (7) is fixed on a pulley clamping plate (14) through a wheel shaft (12);

the pulley clamping plate (14) is in an inverted triangle shape, and pulleys (7) are arranged at two ends of the top of the pulley clamping plate; the bottom corner is provided with a second small hole (25).

3. The unpowered suction cup of claim 2 wherein the switching device comprises: a piston rod (15), a switch (18), a switch link (20);

the switch link (20) sliding inside the switch (18);

the piston rod (15) comprises:

the connecting hole (16) is formed in the upper end of the piston rod (15);

the piston rod connecting shaft (26) penetrates through the second small hole (25) and the connecting hole (16) to fix the piston rod (15) on the pulley clamping plate (14);

the first positioning hole (17) is formed in the piston rod (15), and the first positioning hole (17) is located below the connecting hole (16);

the switch (18) comprises:

a second positioning hole (19), wherein the second positioning hole (19) is formed in the switcher (18);

the fixing pin penetrates through the first positioning hole (17) and is inserted into the second positioning hole (19), and the piston rod (15) and the switcher (18) are fixed;

the switch (18) further comprises:

the upper sawteeth (1801), the upper sawteeth (1801) are positioned at the upper end of the switcher (18), and an upper slideway is formed between every two adjacent upper sawteeth (1801);

the upper slide ways comprise long slide ways (1804) and short slide ways (1803), and every two adjacent upper slide ways are alternately arranged as the long slide ways (1804) and the short slide ways (1803);

a lower serration (1802), the lower serration (1802) being located at a lower end of the switch (18); a lower slideway (1805) is formed between every two adjacent lower sawteeth (1802);

any upper saw tooth (1801) and any lower saw tooth (1802) are not in the same vertical plane; a first inclined plane is arranged at the top end of one side of the upper slideway, a second inclined plane is arranged at the bottom end of one side of the lower slideway (1805), and the inclination directions of the first inclined plane and the second inclined plane are opposite;

the switcher link (20) includes:

a switcher float plate (21), the switcher float plate (21) being located at a lower end of the switcher link (20);

a switch sealing sheet (22), wherein the switch sealing sheet (22) is sealed at the bottom of the switch floating plate (21);

a link for connecting the switcher floating plate (21) and the lower end of the switcher link (20);

the limiting devices (23) are fixed at the upper end and the lower end of the switcher connecting rod (20) and limit the switcher connecting rod (20);

a gravity device (24), the gravity device (24) is arranged at the top end of the switcher link (20).

4. The unpowered suction cup of claim 3 wherein: the suction cup working device includes: a piston (27), a piston inner barrel (28) and an upper guide sleeve (33);

an upper guide sleeve (33) is arranged in the piston (27), and a piston inner barrel (28) is arranged in the upper guide sleeve (33);

a first connecting part (34) is arranged at the center of the bottom of the piston (27), and the inner piston barrel (28) is fixed on the first connecting part (34);

the center of the piston inner barrel (28) is provided with a hole for allowing a piston rod (15) to be inserted;

the upper guide sleeve (33) is fixed at the bottom of the upper cover (3).

5. The unpowered suction cup of claim 4 wherein: the switching device further includes: a cutting edge (31) of the reversing valve and a lifting limit sleeve (32);

the cutting edge (31) of the reversing valve is fixed at the center of the first connecting part (34);

the lifting limiting sleeve (32) is fixed on the first connecting part (34) and is arranged in the inner piston barrel (28);

the cutting edge (31) of the reversing valve comprises an inner caliber (311) and an outer caliber (312); the bottom surface of the switch sealing sheet (22) completely covers the inner caliber (311), and the bottom surface of the switch sealing sheet (22) does not exceed the outer caliber (312);

the lifting limiting sleeve (32) is provided with a first groove (321), and the first groove (321) is used for limiting the switcher floating plate (21).

6. The unpowered suction cup of claim 5 wherein: the pressure meter is characterized in that a positive pressure meter (5) is arranged on the upper cover (3), a protective cover (4) is arranged outside the positive pressure meter (5), and a one-way valve (6) is further arranged on the upper cover (3).

7. The unpowered suction cup of claim 1 wherein: be provided with negative pressure table (9) on cylinder body (10), the bottom is provided with sucking disc clamp (29), negative pressure table (9) are provided with negative pressure table guard shield (11) outward.

8. The unpowered suction cup of claim 6 wherein: the traction device also comprises a piston cavity diaphragm (30) which sequentially comprises from outside to inside,

a second connecting part fixed between the bottom of the upper cover (3) and the cylinder body (10),

an upper end closed chamber (41) formed by covering the inner wall of the cylinder body (10), the upper surface of the wall of the piston (27) and the outer wall of the upper guide sleeve (33),

a third connecting part fixed between the bottom of the upper cover (3) and the upper guide sleeve (33),

a dust cover covering between the upper guide sleeve (33) and the inner piston barrel (28),

a connecting part IV fixed at the upper end of the piston rod (15),

a through hole (39) passing through the piston rod (15).

9. The unpowered suction cup of claim 8 wherein: the piston cavity diaphragm (30) bottom and piston (27) sealing connection, the junction is provided with packing ring (40), upper end airtight chamber (41) is connected with check valve (6).

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