CN113023347A

CN113023347A - Driving mechanism of pneumatic clamping jaw

Info

Publication number: CN113023347A
Application number: CN202110267130.1A
Authority: CN
Inventors: 徐庆富
Original assignee: Schunk Precision Machinery Trading Shanghai Co ltd
Current assignee: Schunk Precision Machinery Trading Shanghai Co ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-06-25

Abstract

The invention discloses a driving mechanism of a pneumatic clamping jaw, which comprises a ventilation block and two groups of cylinder assemblies which are positioned on the same straight line and symmetrically distributed on two sides of the ventilation block. The cylinder assembly comprises a cylinder and a piston rod; one end of a piston rod in the cylinder is provided with a piston part, and the other end of the piston rod is connected with a ventilation block; the piston part divides the inner cavity of the cylinder into a first cavity space and a second cavity space which are independent of each other; the piston rod is internally provided with a first air passage communicated with the first cavity space and a second air passage communicated with the second cavity space; a first air duct and a second air duct which are communicated with each other at two ends and are independent are arranged in the air duct block; one end of the first air duct is communicated with the first air ducts on different piston rods, and one end of the second air duct is communicated with the second air ducts on different piston rods. The invention does not need to add an external air inlet pipeline, saves the installation space and can improve the operation synchronism of the two clamping jaws.

Description

Driving mechanism of pneumatic clamping jaw

Technical Field

The invention relates to the field of pneumatic clamping jaw tools, in particular to a driving mechanism of a pneumatic clamping jaw.

Background

In the working condition of grabbing and carrying workpieces of the existing large-scale pneumatic clamping jaw, an adopted driving mechanism mainly takes a frame with poor sealing performance as a supporting connecting part of an integral mechanism, other parts of the driving mechanism such as a sliding rail, a sliding block and a cylinder assembly are connected to the frame, and the periphery of the driving mechanism is not shielded and sealed by a side plate; at the same time, the two ends of the slide rail are usually connected to the frame only at two end positions. Third, the existing driving part usually adopts an air cylinder, as shown in fig. 1, the frame is composed of a bottom plate 1-1, and two left end frames 1-2 and right end frames 1-3 connected to two symmetrical ends of the bottom plate 1-1, two guide rails 1-7 are connected between the left and right end frames, two left and right sliding blocks 1-6 are connected to the two guide rails 1-7, and clamping parts 1-5 are connected below the sliding blocks 1-6; the cylinder 1-4 is connected with the frame and is positioned between the right clamping component and the bottom plate 1-1 of the frame. Two ends of the piston rod 1-8 are respectively connected with the left clamping component and the air cylinder 1-4, and during movement, air is injected into an inner cavity of the air cylinder through an air inlet hole arranged on the air cylinder through an external air inlet pipe to drive the piston rod 1-8 to move, so that the left clamping component is driven to move towards the right side or the left side, but the right slide block is not moved. When the left clamping component moves towards the right side, the workpiece can be clamped between the left clamping component and the right clamping component, and the workpiece is clamped. When clamping the workpiece, the right slide block is tightly propped against the inner side of the right end frame 1-3.

In the structure of the existing driving mechanism, the following defects exist:

the whole mechanism is arranged on a frame, the frame is poor in sealing performance, components such as the guide rails 1-7, the sliding blocks 1-6 and the air cylinders 1-4 are in an exposed state, and the periphery of the framework is not shielded by side plates or cover plates, so that the framework is easily damaged by accidental collision or enters dust, dirt, moisture and the like, and the service life of the mechanism is further influenced.

And secondly, the guide rails 1-7 are only connected and fixed with the end frames 1-2 at two ends, so that the fixed connection with the frame is realized, when the moment generated by the clamping force in the clamping direction is large, the guide rails 1-7 bear large pulling force, and the fixed ends of the guide rails 1-7 and the frame are limited, so that the large pulling force is difficult to bear, and the risk of breakage, bending or loosening with the frame is easy to occur.

And thirdly, the adopted cylinder assembly is of a common structure, namely, the cylinder assembly comprises a cylinder 1-4 and a piston rod 1-8, the piston rod 1-8 and the cylinder 1-4 can be movably connected, and the joint is sealed. One end of the piston rod 1-8 is provided with a piston part, the cylinder 1-4 is provided with an independent air inlet which is connected with an external air pipe, the air pipe changes the air content in the cylinder to influence the air pressure change in the air cavities at two sides of the piston part, and the air pipe pushes the piston part to move in the cylinder, thereby driving the left clamping part 1-5 connected with the piston rod 1-8 to move. In the structure, the air pressure in the pushing cylinders 1-4 is changed, an external air inlet pipe needs to be additionally connected, the installation is complex, and excessive installation space is occupied. And one cylinder 1-4 is adopted to realize the clamping operation of the left clamping part and the right clamping part, in the operation process, only one of the clamping parts on the left side and the right side moves, the other clamping part does not move, and the clamping parts on the left side and the right side cannot do synchronous centering motion.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a driving mechanism of a pneumatic clamping jaw, which mainly solves the technical problem that the prior art needs to additionally arrange a complex air inlet pipe outside a cylinder for wiring so as to realize the operation of the cylinder.

(II) technical scheme

In order to achieve the purpose, the invention adopts the following technical scheme:

a drive mechanism of pneumatic clamping jaw, its characterized in that: comprises a ventilation block and two groups of cylinder assemblies which are positioned on the same straight line and symmetrically distributed on two sides of the ventilation block;

each group of air cylinder components comprises an air cylinder and a piston rod movably connected with the air cylinder, one end of the piston rod in the air cylinder is provided with a piston part tightly attached to the inner wall of the air cylinder, and the other end of the piston rod outside the air cylinder is connected with a ventilation block; the piston part divides the inner cavity of the cylinder into a first cavity space and a second cavity space which are independent of each other; the piston rod is internally provided with a first air passage and a second air passage which are communicated with each other at two ends; one end of the first air passage is communicated with the first cavity space, and the other end of the first air passage is positioned at the connecting position of the piston rod and the ventilation block; one end of the air passage II is communicated with the cavity space II, and the other end of the air passage II is positioned at the connecting part of the piston rod and the ventilation block;

a first air duct and a second air duct which are communicated with each other at two ends and are independent from each other are arranged in the air duct block, and one end of the first air duct and one end of the second air duct are arranged at the joint of the piston rod and the air duct block; the other ends of the first air duct and the second air duct penetrate through the outer wall of the air block;

one end of the first air duct is communicated with the two air passages on different piston rods in the two groups of cylinder assemblies at the same time, and one end of the second air duct is communicated with the two air passages on different piston rods in the two groups of cylinder assemblies at the same time.

Furthermore, a connecting groove used for connecting the end part of the piston rod is formed in the ventilating block, and a ventilating opening at one end of the first ventilating duct and the second ventilating duct is formed in the inner wall of the connecting groove.

Furthermore, the piston rod is cylindrical, and the connecting groove is hollow and cylindrical.

Further, the gear assembly is further included; the gear assembly comprises two racks distributed in parallel and a gear positioned between the two racks, and the gear is fixed at the bottom of the ventilation block or fixed at the bottom of the ventilation block through a connecting piece; one end of each rack is connected to the bottom of each cylinder, and one side, facing the gear, of each rack is provided with a tooth part which can be embedded with the gear.

The air cylinder assembly is characterized by further comprising a shell, wherein the shell comprises a bottom plate and a side plate, and the bottom plate and the side plate jointly form a concave shell cavity which can accommodate the cylinder assembly and the vent block; the bottom of the ventilation block is connected to the upper side of the bottom plate directly or through a connecting block.

Furthermore, two slide rails are arranged on the inner side of the side plate, and the two slide rails are parallel to the motion direction of the piston rod and distributed on two symmetrical sides of the cylinder; a plurality of sliding blocks are connected to two symmetrical sides of each air cylinder respectively, and one side of each sliding block is connected with the sliding rail in a sliding mode.

Furthermore, a guide wheel is arranged on the bottom plate between each of the two racks and the adjacent side plate, and the tire tread of each guide wheel is close to the side wall of each rack.

Further, the shell also comprises a cover plate, and the cover plate is connected to the side plate and covers the upper side of the ventilation block.

Furthermore, the outer side of each cylinder is also connected with a dust guard which can move back and forth below the cover plate, and the dust guard covers one side of the piston rod.

Further, the cylinder is the square body, the shell cavity is the cuboid.

Further, the piston portion is elliptical.

(III) advantageous effects

Compared with the prior art, the invention provides a driving mechanism of a pneumatic clamping jaw, which has the following beneficial effects:

1. the air cylinder component integrates an external air duct with a piston rod, two air passages with two communicated ends are arranged in a rod body of the piston rod, one ends of the two air passages, which are positioned in an inner cavity of the air cylinder, are respectively communicated with two air cylinder cavity spaces separated by a piston part independently, and the other ends of the two air passages are arranged at the connecting part of the piston rod and an air block; two independent air ducts are arranged in the air duct block, one ends of the two air ducts are independently communicated with the first air duct and the second air duct in the single-group cylinder assembly respectively, and the other ends of the two air ducts are arranged on the side wall of the air duct block and can be connected with external air pressure equipment. Therefore, in each group of cylinder assemblies, two cavity spaces, two air passages and two air passage channels form two mutually independent through air passage channels, when the air-conditioning device is used, air is injected into one air passage channel by external air-conditioning equipment, the air pressure in the cavity space communicated with the air passage channel is increased, the piston part is pushed to move towards the other cavity space direction in the cylinder, the air in the other cavity space flows out along the air passage channel in the piston rod communicated with the air passage channel after being extruded, the air flows through the air passage channel communicated with the air passage channel and is discharged outwards, the air pressure in the two cavity spaces in the same cylinder is changed to push the cylinder to move along the piston rod, and therefore the movement of the clamping jaw connected with the cylinder is driven.

The invention simplifies the arrangement of the air passage, integrates the external air duct inside the piston rod, and can realize the injection and extraction of the air inside the cylinder without arranging an air vent on the surface of the cylinder and connecting the air vent with an external air inlet pipe.

2. The clamping jaw driving mechanism comprises two groups of air cylinder assemblies, wherein the two groups of air cylinder assemblies are positioned on the same straight line and are symmetrically distributed by taking the air through block as an axial center; one end of a first air duct in the air duct block is communicated with two air ducts on different piston rods in the two groups of cylinder assemblies at the same time, and one end of a second air duct is communicated with two air ducts on different piston rods in the two groups of cylinder assemblies at the same time. When air is injected into the first cavity space or the second cavity space of different piston rods through any air duct, the two air claws connected to different cylinders synchronously perform centering motion or separate towards two ends on the same straight line, so that the clamping operation and the loosening operation of workpieces are realized.

Because the piston parts in each group of cylinder assemblies are pushed by air pressure and come from the same air duct, the magnitude of the air pressure pushing force and the pushing time applied to the piston parts are completely synchronous, and therefore, the operation synchronism of the clamping jaws connected with the outer wall of the cylinder is the same.

3. The invention also comprises a shell, wherein the shell comprises a bottom plate and a side plate, and the bottom plate and the side plate jointly form a concave shell cavity which can contain the cylinder assembly and the ventilating block; the bottom of the ventilation block is connected to the upper side of the bottom plate directly or through a connecting block. The cylinder assembly and the air vent block are arranged in the cavity of the shell instead of being exposed to the outside, and the peripheries of the cylinder assembly and the air vent block are shielded by the bottom plate and the side plates, so that the probability of accidental collision damage or entering of dust, dirt, moisture and the like can be reduced, and the service life of the driving mechanism is prolonged.

4. According to the invention, two sliding rails are further arranged on two symmetrical sides of the shell side plate, the side wall of the air cylinder is connected with the sliding rails in a sliding mode through the sliding blocks, and meanwhile, the bottom of the air cylinder is provided with the gear assembly. In the operation process of the cylinder, the rack tooth part in the gear assembly and the gear do meshing motion continuously. The racks at the bottoms of the cylinders at the two sides are simultaneously meshed with the gear at the center, so that the cylinders at the left side and the right side move synchronously, and the clamped object is centered. The force of the cylinder on one side can be transmitted to the other side through the gear rack, and the force on one side is increased. The side surface of the cylinder is provided with a plurality of sliding blocks, so that the whole body can bear larger moment in the use process.

5. The invention also comprises a cover plate covering the upper part of the ventilation block, and the outer side of each cylinder is also connected with a dust guard plate which can shuttle and move under the cover plate, and the dust guard plate covers one side of the piston rod. One side of the ventilation block and one side of the piston rod are covered by the cover plate and the two dustproof plates, so that the dustproof and covering effects are achieved, the narrow and unfavorable cleaning positions of dust, dirt, moisture and the like between the bottom plate and the cylinder assembly can be avoided, and the service life of the whole driving mechanism can be prolonged.

6. In the present invention, the piston portion is formed in an elliptical shape, and the cross-sectional area of the piston is increased by using the space in the width direction at the same height, thereby providing a larger driving force than that of a circular piston.

Drawings

FIG. 1 is a schematic structural diagram of a conventional long-stroke pneumatic clamping jaw driving mechanism;

FIG. 2 is a schematic structural view of the driving mechanism after the upper clamping jaw is installed;

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

FIG. 4 is a cross-sectional view of FIG. 2 with the jaws removed in accordance with the present invention;

FIG. 5 is a bottom view of FIG. 2 with the bottom plate removed in accordance with the present invention;

FIG. 6 is a schematic view of the left cylinder assembly of the present invention;

FIG. 7 is a schematic perspective view of the assembled two sets of cylinder assemblies and gear assemblies of the present invention;

FIG. 8 is a schematic perspective view of two assembled cylinder assemblies and gear assemblies according to the present invention;

FIG. 9 is a first schematic structural view of the housing of the present invention;

FIG. 10 is a second schematic structural view of the housing of the present invention;

FIG. 11 is a schematic perspective view of the left piston rod of the present invention;

FIG. 12 is a cross-sectional view of the left piston rod of the present invention;

FIG. 13 is a schematic view of the structure of the vent block of the present invention;

FIG. 14 is a cross-sectional view of the vent block of the present invention;

in the figure:

1-1-bottom plate, 1-2-left end frame, 1-3-right end frame, 1-4-cylinder, 1-5-clamping component, 1-6-slide block, 1-7-guide rail and 1-8-piston rod;

1-clamping jaw, 2-bottom plate, 3-side plate I, 4-side plate II, 5-side plate III, 6-side plate IV, 7-cover plate, 8-left air cylinder, 9-right air cylinder, 10-ventilation block, 11-left piston part, 12-left piston rod, 13-right piston part, 14-right piston rod, 15-slide rail I, 16-slide block I, 17-slide block II, 18-slide block III, 19-slide block IV, 20-slide rail II, 21-slide block V, 22-slide block VI, 23-slide block VII, 24-slide block VIII, 25-left cavity space I, 26-left cavity space II, 27-right cavity space I, 28-right cavity space II, 29-first rack, 30-second rack, 31-gear, 32-a first guide wheel, 33-a second guide wheel, 34-a first left air passage, 35-a second left air passage, 36-a first right air passage, 37-a second right air passage, 38-a connecting groove, 39-a first ventilation channel, 40-a second ventilation channel, 41-a first ventilation hole, 42-a second ventilation hole, 43-a third ventilation hole, 44-a channel bifurcation port, 45-a first bottom plate ventilation hole, 46-a second bottom plate ventilation hole, 47-a protruding end and 48-a sealing ring mounting groove.

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.

Fig. 2 to 14 show an embodiment of a drive mechanism for a long-stroke pneumatic gripper. A driving mechanism of a pneumatic clamping jaw comprises an air vent block 10 and two groups of cylinder assemblies which are positioned on the same straight line and symmetrically distributed on the left side and the right side of the air vent block 10, wherein the left cylinder assembly comprises a left cylinder 8 and a left piston rod 12 movably connected with the left cylinder 8, and the right cylinder assembly comprises a right cylinder 9 and a right piston rod 14 movably connected with the right cylinder 9.

In this embodiment, the structures and the sizes of the left and right cylinder assemblies are the same, and fig. 6 shows a schematic structural diagram of the left cylinder assembly.

The left end of the left piston rod 12 is connected with a left piston part 11 which can be tightly attached to the inner wall of the left air cylinder 8, and the left piston part 11 divides the inner cavity of the left air cylinder 8 into a left cavity space I25 and a left cavity space II 26; the right end of the right piston rod 14 is connected with a right piston part 13 which can be tightly attached to the inner wall of the right cylinder 9, and the right piston part 13 divides the inner cavity of the right cylinder 9 into a right cavity space I27 and a right cavity space II 28; the first left cavity space 25 and the first right cavity space 27 are both located on the front side of the piston portion, and the second left cavity space 26 and the second right cavity space 28 are both located on the rear side of the piston portion.

A first left air passage 34 and a second left air passage 35 which are communicated with each other at two ends are arranged in the left piston rod 12, the left end of the first left air passage 34 penetrates through the left end of the left piston rod 12 to be communicated with a first left cavity space 25, and the left end of the second left air passage 35 is positioned on the outer wall of the left piston rod 12 at the rear side of the left movable end part 11 to be communicated with a second left cavity space 26.

A first right air passage 36 and a second right air passage 37 with two through ends are arranged in the right piston rod 14, the right end of the first right air passage 36 penetrates through the right end of the right piston rod 14 to be communicated with the first right cavity space 27, and the right end of the second right air passage 37 is positioned on the outer wall of the right piston rod 14 behind the right movable end part 13 to be communicated with the second right cavity space 28.

The right end of the left piston rod 12 and the left end of the right piston rod 14 are respectively connected with the ventilation block 10. In this embodiment, the right end of the left piston rod 12 and the right piston rod 14 have the same structure, and fig. 11 to 12 are schematic structural views of the left piston rod 12. As shown in the figure, a convex end 47 and a sealing ring mounting groove 48 are arranged on the outer wall of the right end of the piston rod 12, and the right vent holes of the first left air passage 34 and the second left air passage 35 are arranged between the convex end 47 and the sealing ring mounting groove 48. When the left piston rod 12 is connected with the ventilation block 10, the right end of the left piston rod 12 is sleeved and embedded into the connecting groove 38, the depth of the right end of the left piston rod 12 embedded into the connecting groove 38 can be controlled through the protruding end 47, a positioning effect is achieved, the right ventilation holes of the first left air passage 34 and the second left air passage 35 are accurately butted with the first ventilation channel 39 and the second ventilation channel 40, and a matched pressing plate can be arranged on the outer side of the protruding end 47 after embedding, so that the tightness between the right end of the left piston rod 12 and the ventilation block 10 is enhanced; an annular sealing ring can be sleeved in the sealing ring mounting groove 48 to achieve a sealing effect, and meanwhile, friction between the left piston rod 12 and the inner wall of the connecting groove 38 is increased, so that the left piston rod 12 is prevented from radially rotating or loosening after being connected.

In the embodiment, the ventilation block 10 is in a block shape, a first ventilation channel 39 and a second ventilation channel 40 which are communicated at two ends and are independent from each other are arranged in the block shape, and the ventilation ports at the upper ends of the first ventilation channel 39 and the second ventilation channel 40 are arranged at the connecting position of the piston rod and the ventilation block 10; the lower ends of the first air duct 39 and the second air duct 40 penetrate through the outer wall of the air block 10;

in this embodiment, the first air duct 39 is communicated with the right end of the first left air duct 34 and the left end of the first right air duct 36, and an air path is formed among the first left cavity space 25, the first left air duct 34, the first right cavity space 27, the first right air duct 36 and the first air duct 39; the second air duct 40 is communicated with the right end of the second left air duct 35 and the left end of the second right air duct 37 at the same time, and an air path passage is formed among the second left cavity space 26, the second left air duct 35, the second right cavity space 28, the second right air duct 37 and the second air duct 40;

when the workpiece is clamped, air is injected into the second air passage channel 40, and the air simultaneously enters the second left air passage 35 and the second right air passage 37 through the second passage air passage channel and finally enters the second left cavity space 26 and the second right cavity space 28 respectively; the air pressure in the left cavity space II 26 and the air pressure in the right cavity space II 28 are simultaneously increased to respectively drive the left air cylinder 8 and the right air cylinder 9 to synchronously move towards the direction of the air vent block 10, meanwhile, after the air in the left cavity space I25 and the air in the right cavity space I27 are extruded, the air is respectively converged into the air vent channel I39 through the left air channel I34 and the right air channel I36, and finally the air is drawn out, so that the synchronous centering motion of the left air cylinder 9 and the right air cylinder 9 is realized, the clamping jaws 1 respectively installed on the outer sides of the two air cylinders are driven to synchronously center, and the operation of clamping the workpiece. When the first air duct 39 is used for air injection and the second air duct 40 is used for air extraction, separation of the two clamping jaws 1 and thus unclamping of the clamped workpiece can be achieved.

Preferably, the right side of the left piston rod 12 and the left side of the right piston rod 14 are both connected with the ventilation block 10 through a connecting groove 38 arranged on the ventilation block 10; in this embodiment, the left and right piston rods 14 are both cylinders, and the connecting grooves 38 are cylindrical shapes penetrating through the left and right sides of the ventilation block 10; during connection, the right side of the left piston rod 12 and the left side of the right piston rod 14 are embedded into the connecting groove 38, so that the connection strength of the piston rod and the ventilation block 10 can be enhanced, meanwhile, the ventilation hole at one end of the piston rod is conveniently butted with the ventilation hole of the ventilation channel on the inner wall of the connecting groove 38, the structure is simple, and the sealing performance is better.

Preferably, a gear assembly is also included. As shown in fig. 7-8, the gear assembly includes two parallel first racks 29, a second rack 30, and a gear 31 fixed to the bottom of the ventilation block 10 through a connecting block and located between the two racks; the left end of the first rack 29 is fixedly connected to the bottom of the right air cylinder 9, and the left end of the second rack 30 is fixedly connected to the bottom of the left air cylinder 8; the first rack 29 and the second rack 30 are parallel to each other and parallel to the piston rod, a gear 31 is further arranged between the first rack 29 and the second rack 30, and the upper end of the gear 31 is fixed on the lower side of the ventilation block 10 through a connecting piece. During operation, the tooth parts arranged on one sides of the first rack 29 and the second rack 30 facing the gear 31 are meshed with the gear 31, and the rack is promoted to drive the cylinder to move through the axial movement of the gear 31, so that the acting force in the moving direction of the cylinder is enhanced, and the cylinder is more labor-saving and smoother to operate.

In this embodiment, the first air duct 39 is provided with two air vents, namely an air vent 41 and an air vent 42, on the inner wall of the connecting groove 38, and the second air duct 40 is provided with an air vent 43 on the inner wall of the connecting groove 38. Two air sub-passages are formed in the first air duct 39, the two air sub-passages are intersected with a main air duct of the first air duct 39 at a duct bifurcation 44, and the other ends of the two air sub-passages extend to the inner wall of the connecting groove 38 to form a first air vent 41 and a second air vent 42 respectively. When connected, the first vent hole 41 is communicated with the first left air passage 34, the second vent hole 42 is communicated with the first right air passage 36, and the third vent hole 43 is simultaneously communicated with the second left air passage 35 and the second right air passage 37, as shown in fig. 13-14. The establishment of the air passage sub-channel can flexibly control the injection and extraction speed of air.

Preferably, a housing is also included, which includes a bottom plate 2 and side plates. As shown in fig. 9-10, in the present embodiment, the side panels include a first side panel 3, a second side panel 4, a third side panel 5, and a fourth side panel 6. The side plate I3, the side plate II 4, the side plate III 5, the side plate IV 6 and the bottom plate 2 form an inner concave shell cavity which can contain the cylinder assembly and the ventilation block 10. In this embodiment, the shell cavity is cuboid, and two sets of cylinder components and the piece of ventilating 10 of controlling are arranged in the shell cavity, are sheltered from by four curb plates all around in, and the piece of ventilating 10 bottom is connected in 2 upsides of bottom plate directly or through the connecting block. Through the shell, the cylinder assembly and the ventilation block 10 can be prevented from being exposed to the outside, the periphery of the cylinder assembly and the ventilation block is shielded by the bottom plate 2 and the side plates, the probability of accidental collision damage or entering of dust, dirt, moisture and the like can be reduced, and the service life of the driving mechanism is prolonged.

During connection, the bottom of the air vent block 10 is fixed on the upper side of the bottom plate 2 through a connecting block, the lower ends of the first air vent channel 39 and the second air vent channel 40 penetrate through the bottom of the air vent block 10 and respectively penetrate through a bottom plate air vent hole I45 and a bottom plate air vent hole II 46 on the side surface of the bottom plate 2 through a channel in the bottom connecting block. In use, air is injected into the chimney first 39 or the chimney second 40 from the floor vent first 45 and the floor vent second 46.

Preferably, a first sliding rail 15 and a second sliding rail 20 are respectively arranged on the inner sides of the first side plate 3 and the second side plate 4, and the first sliding rail 15 and the second sliding rail 20 are parallel to the motion direction of the piston rod and are distributed on two symmetrical sides of the cylinder; the first sliding rail 15 is slidably connected with a first sliding block 16, a second sliding block 17, a third sliding block 18 and a fourth sliding block 19, and the second sliding rail 20 is slidably connected with a fifth sliding block 21, a sixth sliding block 22, a seventh sliding block 23 and an eighth sliding block 24; the first sliding block 16 and the second sliding block 17 are connected to one side of the left air cylinder 8, and the fifth sliding block 21 and the sixth sliding block 22 are connected to the other symmetrical side of the left air cylinder 8; the third sliding block 18 and the fourth sliding block 19 are connected to one side of the right cylinder 9, and the seventh sliding block 23 and the eighth sliding block 24 are connected to the other symmetrical side of the right cylinder 9. When the left and right cylinders 9 move, the left and right sides of the cylinders move along the sliding rails under the action of the sliding blocks, so that the resistance in the movement process can be reduced, and the air can move more smoothly. Meanwhile, in the embodiment, the first sliding rail 15 and the second sliding rail 20 are fixedly connected with the inner wall of the side plate on the side surface, and the cylinder assembly is connected with the sliding rails through the sliding blocks, so that the connection surface of the cylinder assembly and the shell can be increased, and the connection strength of the cylinder assembly and the shell is enhanced; meanwhile, the two sliding blocks on the two sides of each air cylinder are symmetrically distributed, and the sum of the distance between the two sliding blocks on the same side and the width of the two sliding blocks is equal to the length of the side wall of the air cylinder, so that the moment generated by large clamping force can be borne, and the product can be applied to the condition that the large clamping force is needed and the clamping arm is long.

Preferably, a first guide wheel is arranged between the first rack 29 and the first side plate on the upper side of the bottom plate 2, and a second guide wheel is arranged between the second rack 30 and the second side plate; the treads of the two guide wheels are next to the rack sidewalls. When the two air cylinders move synchronously, the two racks are arranged between the two guide wheels, the smooth side of the first rack 29 is tightly attached to the tread of the first guide wheel 32 to run, and the smooth side of the second rack 30 is tightly attached to the tread of the second guide wheel 33 to run; the two guide wheels can effectively guide the two racks to run on a fixed track between the guide wheels and the gear 31, so that the stability of the running track of the cylinder is improved.

Preferably, the housing further comprises a cover plate 7, and the cover plate 7 is connected to the side plate and covers the upper side of the vent block 10.

Preferably, the outer sides of the left cylinder and the right cylinder are respectively connected with a first dust guard and a second dust guard which can shuttle under the cover plate 7, the first dust guard is connected to the right side of the upper end of the left cylinder 8, and the second dust guard is connected to the left side of the upper end of the right cylinder 9.

The arrangement of the cover plate 7 and the dustproof plate can reduce the probability of accidental collision damage or entering dust, dirt, moisture and the like, and further prolong the service life of the driving mechanism.

Preferably, the left piston portion 11 and the right piston portion 13 are both elliptical, and provide a larger driving force than a circular piston with an increased cross-sectional area using a width-direction space at the same height dimension.

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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A drive mechanism of pneumatic clamping jaw, its characterized in that: comprises a ventilation block and two groups of cylinder assemblies which are positioned on the same straight line and symmetrically distributed on two sides of the ventilation block;

2. A pneumatic jaw drive mechanism according to claim 1, wherein: and a connecting groove used for connecting the end part of the piston rod is arranged in the ventilation block, and a ventilation port at one end of the first ventilation channel and the second ventilation channel is arranged on the inner wall of the connecting groove.

3. A pneumatic jaw drive mechanism according to claim 2, wherein: the piston rod is cylindrical, and the connecting groove is hollow and cylindrical.

4. A pneumatic jaw drive mechanism according to claim 3, wherein: also includes a gear assembly; the gear assembly comprises two racks distributed in parallel and a gear positioned between the two racks, and the gear is fixed at the bottom of the ventilation block or fixed at the bottom of the ventilation block through a connecting piece; one end of each rack is connected to the bottom of each cylinder, and one side, facing the gear, of each rack is provided with a tooth part which can be embedded with the gear.

5. A pneumatic jaw drive mechanism according to claim 4, wherein: the air cylinder assembly is characterized by further comprising a shell, wherein the shell comprises a bottom plate and a side plate, and the bottom plate and the side plate jointly form a concave shell cavity which can contain the air cylinder assembly and the air vent block; the bottom of the ventilation block is connected to the upper side of the bottom plate directly or through a connecting block.

6. A pneumatic jaw drive mechanism according to claim 5, wherein: two sliding rails are arranged on the inner side of the side plate, are parallel to the motion direction of the piston rod and are distributed on two symmetrical sides of the cylinder; a plurality of sliding blocks are connected to two symmetrical sides of each air cylinder respectively, and one side of each sliding block is connected with the sliding rail in a sliding mode.

7. A pneumatic jaw drive mechanism according to claim 6, wherein: and the bottom plate between the two racks and the adjacent side plate is respectively provided with a guide wheel, and the tire tread of each guide wheel is close to the side wall of each rack.

8. A pneumatic jaw drive mechanism according to claim 7, wherein: the shell further comprises a cover plate, and the cover plate is connected to the side plate and covers the upper side of the ventilation block.

9. A pneumatic jaw drive mechanism according to claim 8, wherein: the outer side of each cylinder is also connected with a dust guard which can move back and forth below the cover plate, and the dust guard covers one side of the piston rod.

10. A pneumatic jaw drive mechanism according to claim 9, wherein: the cylinder is the square body, the shell cavity is the cuboid.

11. A pneumatic gripper drive mechanism according to any one of claims 1-10, wherein: the piston portion is oval.