阅读说明：本技术 一种缓冲式自锁气缸 (Buffering formula auto-lock cylinder ) 是由 王志军 李童 于 2021-07-01 设计创作，主要内容包括：本发明涉及气缸领域,具体为一种缓冲式自锁气缸,包括缸体与从缸体前端面滑动插装进内侧的伸缩杆,所述伸缩杆内侧通过抖动机构活动安装与伸缩杆同轴的抖动杆,所述抖动杆的后端延伸至伸缩杆的外部并设置有减震机构,所述缸体的后内壁上设置有与减震机构相触碰的接触柱,所述缸体的内壁开设有朝前后方向延伸的内滑道,所述伸缩杆的外表面靠近后端处活动套设有活塞机构,所述抖动杆的前端设置有传递振动的膜腔机构。该一种缓冲式自锁气缸,实现自锁可以是伸缩杆移动了任意长度,在定位工件时可以灵活适应不同厚薄、大小的工件进行定位,内部不会因若干次缓冲挤压过程就使得减震处内壁粘连的现象发生,保障缓冲的效果,延长使用寿命。(The invention relates to the field of cylinders, in particular to a buffer type self-locking cylinder which comprises a cylinder body and a telescopic rod, wherein the telescopic rod is inserted into the inner side of the cylinder body in a sliding mode from the front end face of the cylinder body, the inner side of the telescopic rod is movably provided with a shaking rod coaxial with the telescopic rod through a shaking mechanism, the rear end of the shaking rod extends to the outer portion of the telescopic rod and is provided with a damping mechanism, a contact column which is in contact with the damping mechanism is arranged on the rear inner wall of the cylinder body, an inner slide way which extends forwards and backwards is arranged on the inner wall of the cylinder body, a piston mechanism is movably sleeved on the outer surface of the telescopic rod close to the rear end, and a membrane cavity mechanism which transmits vibration is arranged at the front end of the shaking rod. This buffering formula auto-lock cylinder realizes that the auto-lock can be that the telescopic link has removed arbitrary length, can adapt to different thickness, the work piece of size in a flexible way when the work piece of location and fix a position, and inside can not be because of the phenomenon emergence that a plurality of times buffering extrusion process just made the adhesion of shock attenuation department inner wall, the effect of guarantee buffering, increase of service life.)

1. The utility model provides a buffering formula auto-lock cylinder, includes cylinder body (1) and slides the plug-in from cylinder body (1) preceding terminal surface and adorns inboard telescopic link (2), its characterized in that: the inner side of the telescopic rod (2) is movably provided with a shaking rod (3) which is coaxial with the telescopic rod (2) through a shaking mechanism (4), the rear end of the shaking rod (3) extends to the outside of the telescopic rod (2) and is provided with a damping mechanism (5), a contact column (9) which is contacted with the damping mechanism (5) is arranged on the rear inner wall of the cylinder body (1), the inner wall of the cylinder body (1) is provided with an inner slide way (7) which extends towards the front-back direction, the outer surface of the telescopic rod (2) is movably sleeved with a piston mechanism (6) close to the rear end, and the front end of the shaking rod (3) is provided with a membrane cavity mechanism (8) which transmits vibration;

the telescopic rod (2) comprises a sliding-out part (21) in sliding fit with the front end face of the cylinder body (1), a splicing part (22) fixedly connected to the rear end of the sliding-out part (21), and a strip-shaped cavity (23) formed along the sliding-out part (21) and the middle shaft of the splicing part (22), and the shaking rod (3) penetrates through the inner side of the strip-shaped cavity (23);

the piston mechanism (6) comprises a sliding block (61) which is slidably sleeved on the outer surface of the splicing part (22), a rubber ring (62) which is fixedly sleeved on the outer surface of the sliding block (61), and a sliding lug (63) which extends from the outer surface of the rubber ring (62), the sliding lug (63) is inserted into the inner side of the inner slide way (7) in a sliding manner, the rubber ring (62) is in sliding fit with the inner wall of the cylinder body (1), a reversing mechanism is rotatably sleeved at the position, close to the front of the sliding block (61), of the outer surface of the splicing part (22), and the reversing mechanism is pushed to rotate and tightly clamps the inner wall of one side of the inner slide way (7) when the sliding block (61) moves forwards under the action of air pressure;

the shaking mechanism (4) comprises a columnar cavity (41) which is arranged on the rear end face of the sliding-out part (21) and communicated with the strip-shaped cavity (23), and a connecting disc (44) which is movably arranged on the inner side of the columnar cavity (41) through a plurality of elastic frame structures sleeved on the outer surface, the connecting disc (44) is coaxially and fixedly sleeved on the outer surface of the shaking rod (3), and a gap is reserved between the outer surface of the connecting disc (44) and the inner wall of the columnar cavity (41);

the damping mechanism (5) comprises a connecting cylinder (52) fixedly connected to the rear end face of the splicing part (22), and the rear end of the shaking rod (3) extends into the inner side of the connecting cylinder (52) and is provided with a restoring structure which pushes the inner wall of the connecting cylinder (52) along with shaking of the shaking rod (3);

the front end face of the sliding-out portion (21) is provided with a hidden cavity (24) communicated with the strip-shaped cavity (23), the membrane cavity mechanism (8) comprises a cover cylinder (81) fixedly installed at the front end of the shaking rod (3), and the cover cylinder (81) is located on the inner side of the hidden cavity (24).

2. The buffer type self-locking air cylinder according to claim 1, characterized in that: the sliding-out portion (21) is fixedly connected with the splicing portion (22) through bolts which are driven into the cylinder body close to the edge, the cylinder body (1) is provided with an air outlet interface (11) and an air inlet interface (12) respectively close to the front end and the rear end of the upper end face, the contact column (9) is coaxially arranged with the telescopic rod (2), and the contact column (9) is in threaded fit with the cylinder body (1).

3. The buffer type self-locking air cylinder according to claim 1, characterized in that: annular groove (68) have been seted up near the rear end department to the surface of concatenation portion (22), sliding block (61) slip card is gone into the inboard of annular groove (68), reversing mechanism is including rotating carousel (65) that the suit was just close to annular groove (68) the place ahead at concatenation portion (22) surface, extend connection lug (66) towards the direction of keeping away from the axis on the border of carousel (65), connection lug (66) stretch into the inboard of inner slide (7), the both sides external fixed surface of connection lug (66) is connected with cushion (67), the rear end face of carousel (65) extends connection screw thread section of thick bamboo (64), connection screw thread section of thick bamboo (64) insert and screw-thread fit mutually from the preceding terminal surface of sliding block (61).

4. The buffer type self-locking air cylinder according to claim 1, characterized in that: the elastic frame structure comprises a shaking elastic sheet (42) sleeved on the outer surface of the connecting disc (44), the shaking elastic sheet (42) is fixedly connected with the inner wall of the hidden cavity (24), a protruding part (43) sleeved on the edge of the connecting disc (44) extends from one side, close to the connecting disc (44), of the shaking elastic sheet (42), and the shaking elastic sheet (42) is made of 304 stainless steel.

5. The buffer type self-locking air cylinder according to claim 1, characterized in that: the restoring mechanism comprises a filling block (56) fixedly connected to the rear end of the shaking rod (3), a fixed soft board (51) extends out of the front end of the connecting cylinder (52), the fixed soft board (51) is fixedly connected to the rear end face of the splicing part (22), an inner convex part (53) extends backwards from the inner wall of the fixed soft board (51), the filling block (56) is fixedly inserted into the inner side of the inner convex part (53), and a plurality of tentacles (55) extend out of the rear end face of the inner convex part (53).

6. The buffer type self-locking air cylinder according to claim 5, characterized in that: the fixed soft board (51), the connecting cylinder (52), the inner convex part (53) and the antenna (55) are all made of rubber, and a thinning part (54) is arranged at the joint of the inner convex part (53) and the fixed soft board (51).

7. The buffer type self-locking air cylinder according to claim 1, characterized in that: extend on the front end border of cover section of thick bamboo (81) and contact membrane (82), the preceding terminal surface of contacting membrane (82) runs through and has seted up through-hole (84), the inboard of cover section of thick bamboo (81) runs through and is provided with construction bolt (83), construction bolt (83) extend towards the rear and insert the front end of shaking pole (3), screw-thread fit between construction bolt (83) and shaking pole (3), cover section of thick bamboo (81) and contact membrane (82) integrated into one piece, cover section of thick bamboo (81) and contact membrane (82) are 304 stainless steel.

Technical Field

The invention relates to the field of cylinders, in particular to a buffer type self-locking cylinder.

Background

The cylinder is a cylindrical metal part for guiding the piston to perform linear reciprocating motion in the cylinder, the cylinder is widely used in the fixation of a machined workpiece, the clamping piece is fixedly installed at the telescopic end and used for abutting against the surface of the workpiece, the inner side piston is pushed and extruded in the process of introducing gas, and then the telescopic end is firmly abutted against the workpiece, so that the subsequent machining steps of punching, cutting and the like on the workpiece are ensured, and the workpiece is prevented from loosening in the machining process to influence the machining precision.

The Chinese patent application No. CN202010191515.X discloses a buffer type self-locking cylinder, which comprises a base, a driving cylinder, a self-locking unit and a tripod, wherein the upper end of the base is provided with the driving cylinder, the outer wall of the driving cylinder is provided with the self-locking unit, and the outer wall of the base is connected with the tripod in a clamping manner; the piston rod is fixed in a double self-locking mode, so that the loss of the piston and the sealing ring is reduced, the service life of the self-locking mechanism is prolonged in the double self-locking mode, and the service life of the cylinder is prolonged through clamping, threaded clamping and triple support of the piston; according to the invention, the tripod clamped at the lower end of the cylinder is arranged, so that the problem that the cylinder is toppled in the use process is prevented, and the potential safety hazard is solved; the above-described liquid cylinder still has some disadvantages.

The existing cylinders have some disadvantages:

(1) the cylinder is often applied to the technical field of workpiece fixing, and the self-locking cannot be flexibly realized after the telescopic end is abutted against the workpiece, namely the self-locking of the existing cylinder needs to be controlled by an additional mechanism, and the self-locking cannot be realized under the condition that the cylinder feeds a clamp randomly;

(2) the buffering at the inner side of the cylinder is carried out through the spring, and the spring continuously converts elastic potential energy and kinetic energy in the process of absorbing kinetic energy, so that the stability degree of the telescopic rod is poor, and the stability degree of the telescopic rod in the using process of the cylinder is influenced; the existing buffering is also carried out through a rubber pad, the buffering effect is determined by the deformation effect of the rubber pad, the texture is too hard and is difficult to play a good slowing effect, the texture is softer and is difficult to recover after being deformed too much, the service life is short, a reasonable buffering structure is lacked for the air cylinder, and the service life of the air cylinder is influenced by the problem;

therefore, a buffer type self-locking air cylinder is provided.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides the following technical scheme: a buffer type self-locking cylinder comprises a cylinder body and a telescopic rod inserted into the inner side of the cylinder body from the front end face of the cylinder body in a sliding mode, wherein the inner side of the telescopic rod is provided with a shaking rod which is movably mounted with the telescopic rod through a shaking mechanism, the rear end of the shaking rod extends to the outside of the telescopic rod and is provided with a damping mechanism, a contact column which is in contact with the damping mechanism is arranged on the inner wall of the rear end of the cylinder body, an inner slide which extends forwards and backwards is arranged on the inner wall of the cylinder body, a piston mechanism is movably sleeved on the outer surface of the telescopic rod close to the rear end, and a membrane cavity mechanism for transmitting vibration is arranged at the front end of the shaking rod;

the telescopic rod comprises a sliding-out part in sliding fit with the front end face of the cylinder body, a splicing part fixedly connected to the rear end of the sliding-out part, and a strip-shaped cavity formed along the sliding-out part and a central shaft of the splicing part, and the shaking rod penetrates through the inner side of the strip-shaped cavity;

the piston mechanism comprises a sliding block, a rubber ring and a sliding lug, the sliding block is slidably sleeved on the outer surface of the splicing part, the rubber ring is fixedly sleeved on the outer surface of the sliding block, the sliding lug extends from the outer surface of the rubber ring, the sliding lug is inserted into the inner side of the inner slideway in a sliding mode, the rubber ring is in sliding fit with the inner wall of the cylinder body, a reversing mechanism is rotatably sleeved on the outer surface of the splicing part close to the front of the sliding block, and the reversing mechanism is pushed to rotate and tightly clamps the inner wall of one side of the inner slideway when the sliding block moves forwards under the action of air pressure;

the shaking mechanism comprises a columnar cavity which is arranged on the rear end face of the sliding-out part and communicated with the strip-shaped cavity, and a connecting disc which is movably arranged on the inner side of the columnar cavity through a plurality of elastic frame structures sleeved on the outer surface, the connecting disc is coaxially and fixedly sleeved on the outer surface of the shaking rod, and a gap is reserved between the outer surface of the connecting disc and the inner wall of the columnar cavity;

the damping mechanism comprises a connecting cylinder fixedly connected to the rear end face of the splicing part, and the rear end of the shaking rod extends into the inner side of the connecting cylinder and is provided with a restoring structure which pushes the inner wall of the connecting cylinder along with shaking of the shaking rod;

the front end face of the sliding-out portion is provided with a hidden cavity communicated with the strip-shaped cavity, the membrane cavity mechanism comprises a cover cylinder fixedly installed at the front end of the shaking rod, and the cover cylinder is located on the inner side of the hidden cavity.

When the telescopic rod is used, the telescopic rod is suitable for a cylinder for fixing a workpiece, the workpiece is cut, drilled and other processing steps, when the front end of the telescopic rod props against the workpiece and cannot continue to advance, the sliding block on the inner side continues to advance under the air pressure, the reversing mechanism rotates to prop against the inner wall of the inner slide way, the acting force in the forward direction is converted into the vertical direction, and self-locking is realized by means of the friction force between the inner slide ways, so that the telescopic rod can move by any length in the self-locking way, and the telescopic rod can be flexibly suitable for workpieces with different thicknesses and sizes to position when the workpiece is positioned; buffering by connecting cylinder contact post when the telescopic link rethread resets, later when the telescopic link antedisplacement stretches out to support the work piece, the vibration of drilling, cutting is by the transmission of twitter pole to restore the connecting cylinder structure by mechanism of restoring, in order to ensure next buffering effect, can not just make the phenomenon of shock attenuation department inner wall adhesion take place because of a plurality of buffering extrusion processes, the effect of guarantee buffering, increase of service life.

Preferably, the sliding-out portion is fixedly connected with the splicing portion through bolts driven into the cylinder body close to the edges, the cylinder body is provided with an air outlet interface and an air inlet interface respectively close to the front end and the rear end of the upper end face, the contact column is coaxially arranged with the telescopic rod, and the contact column is in threaded fit with the cylinder body.

During operation, the contact column can be taken down by rotating, and due to the structure that the contact column is often collided, the contact column is convenient to replace regularly due to the design.

Preferably, the surface of concatenation portion is close to rear end department and has seted up annular groove, the inboard in annular groove is gone into to the sliding block slip card, reversing mechanism is including rotating the rolling disc of suit at concatenation portion surface and near annular groove the place ahead, the centraxonial direction is kept away from to the orientation on the border of rolling disc extends the connection lug, the inboard that the connection lug stretched into the inner slide, the both sides external surface fixedly connected with cushion of connection lug, a connecting thread section of thick bamboo is extended to the rear end face of rolling disc, a connecting thread section of thick bamboo inserts and looks screw-thread fit from the preceding terminal surface of sliding block.

During operation, when the sliding block slides to the place ahead, a connecting thread section of thick bamboo will take place to rotate relative to it, and then makes the rolling disc rotate for the cushion supports on the inner wall of slide including, plays the effect of limiting position.

Preferably, the elastic frame structure comprises a shaking elastic sheet sleeved on the outer surface of the connecting disc, the shaking elastic sheet is fixedly connected with the inner wall of the hidden cavity, a protruding part sleeved on the edge of the connecting disc extends from one side of the shaking elastic sheet close to the connecting disc, and the shaking elastic sheet is made of 304 stainless steel.

During operation, the shaking elastic sheet can ensure that a better elastic effect can be kept during operation, and shaking of the shaking rod is facilitated.

Preferably, the restoring mechanism comprises a plugging block fixedly connected to the rear end of the shaking rod, a fixed soft board extends out of the front end of the connecting cylinder, the fixed soft board is fixedly connected to the rear end face of the splicing part, an inner convex part extends backwards from the inner wall of the fixed soft board, the plugging block is fixedly inserted into the inner side of the inner convex part, and a plurality of tentacles extend out of the rear end face of the inner convex part.

During operation, the antenna contacts the inner wall of the connecting cylinder, so that the restoration of the structure of each position of the inner wall of the connecting cylinder is promoted, and the next buffering effect is ensured.

Preferably, the fixed soft board, the connecting cylinder, the inner convex part and the antenna are all made of rubber, and a thinning part is arranged at the joint of the inner convex part and the fixed soft board.

During operation, the rubber material can produce better elasticity to have the buffering effect, the synchronous motion that interior convex part can relax when the portion of thinning ensures the stopper shake, with the effect of guaranteeing the recovered structure.

Preferably, extend out the contact membrane on the front end border of a cover section of thick bamboo, the opening has been seted up in the preceding terminal surface run-through of contact membrane, the inboard of a cover section of thick bamboo is run-through and is provided with construction bolt, construction bolt extends and inserts the front end of shaking lever towards the rear, screw-thread fit between construction bolt and the shaking lever, a cover section of thick bamboo and contact membrane integrated into one piece, a cover section of thick bamboo is 304 stainless steel with the contact membrane.

During operation, the contact area is increased by the contact film, vibration is effectively transmitted, the cover cylinder forms a cavity, the cover cylinder can be influenced by the vibration of air inside, and therefore the vibration transmission effect is improved.

Advantageous effects

Compared with the prior art, the invention provides a buffer type self-locking air cylinder, which has the following beneficial effects:

1. the invention is suitable for a cylinder for fixing a workpiece, simultaneously performs processing steps such as cutting, drilling and the like on the workpiece, when the front end of the telescopic rod props against the workpiece and cannot continue to advance, the sliding block on the inner side continues to advance under the air pressure, so that the reversing mechanism rotates to prop against the inner wall of the inner slideway, the forward acting force is converted into the vertical direction, and self-locking is realized by means of the friction force between the inner slideways.

2. According to the invention, when the telescopic rod moves backwards and resets, the connecting cylinder contacts the contact column for buffering, then when the telescopic rod moves forwards and extends out to abut against a workpiece, the vibration of drilling and cutting is transmitted by the shaking rod, and the structure of the connecting cylinder is restored by the restoring mechanism, so that the next buffering effect is ensured, the phenomenon that the inner wall of the damping part is adhered due to a plurality of buffering extrusion processes is avoided, the buffering effect is ensured, and the service life is prolonged.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a partial cross-sectional view of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 3 according to the present invention;

FIG. 5 is an enlarged view of the invention at B in FIG. 3;

FIG. 6 is a cross-sectional view of the dithering mechanism of the present invention;

FIG. 7 is a schematic view of the piston mechanism of the present invention;

FIG. 8 is a cross-sectional view of a membrane chamber mechanism of the present invention.

In the figure: 1. a cylinder body; 11. an air outlet interface; 12. an air inlet interface; 2. a telescopic rod; 21. a slide-out section; 22. a splice; 23. a strip-shaped cavity; 24. concealed into the cavity; 3. a shaking rod; 4. a shaking mechanism; 41. a columnar cavity; 42. shaking the elastic sheet; 43. a projection; 44. a connecting disc; 5. a damping mechanism; 51. fixing the soft board; 52. a connecting cylinder; 53. an inner convex portion; 54. a thinning part; 55. an antenna; 56. a filling block; 6. a piston mechanism; 61. a slider; 62. a rubber ring; 63. a sliding projection; 64. connecting the threaded cylinder; 65. rotating the disc; 66. a connection bump; 67. a rubber pad; 68. an annular groove; 7. an inner slide way; 8. a membrane cavity mechanism; 81. a cover cylinder; 82. a contact film; 83. installing a bolt; 84. a port; 9. contacting the pillars.

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.

Referring to fig. 1-8, a buffer type self-locking cylinder comprises a cylinder body 1 and a telescopic rod 2 inserted into the cylinder body 1 from the front end face thereof in a sliding manner, wherein the inner side of the telescopic rod 2 is movably provided with a shaking rod 3 coaxial with the telescopic rod 2 through a shaking mechanism 4, the rear end of the shaking rod 3 extends to the outside of the telescopic rod 2 and is provided with a damping mechanism 5, the rear inner wall of the cylinder body 1 is provided with a contact column 9 contacting with the damping mechanism 5, the inner wall of the cylinder body 1 is provided with an inner slide 7 extending in the front-rear direction, the outer surface of the telescopic rod 2 is movably sleeved with a piston mechanism 6 near the rear end, and the front end of the shaking rod 3 is provided with a membrane cavity mechanism 8 for transmitting vibration;

the telescopic rod 2 comprises a sliding-out part 21 in sliding fit with the front end face of the cylinder body 1, a splicing part 22 fixedly connected to the rear end of the sliding-out part 21, and a strip-shaped cavity 23 jointly formed along the middle shafts of the sliding-out part 21 and the splicing part 22, and the shaking rod 3 penetrates through the inner side of the strip-shaped cavity 23;

the piston mechanism 6 comprises a sliding block 61 which is sleeved on the outer surface of the splicing part 22 in a sliding manner, a rubber ring 62 which is fixedly sleeved on the outer surface of the sliding block 61, and a sliding lug 63 which extends out of the outer surface of the rubber ring 62, wherein the sliding lug 63 is inserted and inserted in the inner side of the inner slide way 7 in a sliding manner, the rubber ring 62 is in sliding fit with the inner wall of the cylinder body 1, a reversing mechanism is rotatably sleeved on the outer surface of the splicing part 22 close to the front part of the sliding block 61, and the reversing mechanism is pushed to rotate and tightly clamps the inner wall of one side of the inner slide way 7 when the sliding block 61 moves forwards under the action of air pressure;

the shaking mechanism 4 comprises a columnar cavity 41 which is arranged on the rear end face of the sliding-out part 21 and communicated with the strip-shaped cavity 23, and a connecting disc 44 which is movably arranged on the inner side of the columnar cavity 41 through a plurality of elastic frame structures sleeved on the outer surface, the connecting disc 44 is coaxially and fixedly sleeved on the outer surface of the shaking rod 3, and a gap is reserved between the outer surface of the connecting disc 44 and the inner wall of the columnar cavity 41;

the damping mechanism 5 comprises a connecting cylinder 52 fixedly connected to the rear end face of the splicing part 22, and the rear end of the shaking rod 3 extends into the inner side of the connecting cylinder 52 and is provided with a restoring structure which pushes the inner wall of the connecting cylinder 52 along with shaking of the shaking rod 3;

the front end face of the sliding-out part 21 is provided with a hidden cavity 24 communicated with the strip-shaped cavity 23, the membrane cavity mechanism 8 comprises a cover cylinder 81 fixedly arranged at the front end of the shaking rod 3, and the cover cylinder 81 is positioned at the inner side of the hidden cavity 24.

When the automatic self-locking device works, the automatic self-locking device is suitable for a cylinder for fixing a workpiece, the workpiece is cut, drilled and other processing steps, when the front end of the telescopic rod 2 abuts against the workpiece and cannot advance continuously, the sliding block 61 on the inner side continues to advance under air pressure, so that the reversing mechanism rotates to abut against the inner wall of the inner slide way 7, the forward acting force is converted into the vertical direction, self-locking is realized by means of the friction force between the inner slide ways 7, in this way, the self-locking can be realized by that the telescopic rod 2 moves by any length, and the automatic self-locking device can flexibly adapt to workpieces with different thicknesses and sizes for positioning when the workpiece is positioned; buffer by connecting cylinder 52 contact post 9 when telescopic link 2 rethread resets, later when telescopic link 2 antedisplacement stretches out to support the work piece, the vibration of drilling, cutting is transmitted by shaking pole 3 to restore connecting cylinder 52 structure by the mechanism of restoring, in order to ensure next buffering effect, can not just make the phenomenon of shock attenuation department inner wall adhesion take place because of a plurality of buffering extrusion processes, the effect of guarantee buffering, increase of service life.

As an implementation mode of the invention, the sliding-out part 21 and the splicing part 22 are fixedly connected through bolts driven in positions close to the edges, the cylinder body 1 comprises a structure which is provided with an upper end surface close to the front end and the rear end and is respectively provided with an air outlet port 11 and an air inlet port 12, the structure is a conventional cylinder and is used for controlling the air pressure inside and controlling the movement of the telescopic rod 2, the contact column 9 and the telescopic rod 2 are coaxially arranged, the contact column 9 is in threaded fit with the cylinder body 1, the contact column 9 can be taken down by rotating in the use process, and the design is convenient for the regular replacement of the contact column 9 due to the structure that the contact column is frequently collided.

As an embodiment of the present invention, an annular groove 68 is formed at an outer surface of the splice 22 near the rear end, the sliding block 61 is slidably inserted into an inner side of the annular groove 68, the reversing mechanism includes a rotating disc 65 rotatably sleeved on the outer surface of the splice 22 and near the front of the annular groove 68, a connecting protrusion 66 extends from an edge of the rotating disc 65 in a direction away from the central axis, the connecting protrusion 66 extends into an inner side of the inner slide 7, rubber pads 67 are fixedly connected to outer surfaces of two sides of the connecting protrusion 66, a connecting threaded cylinder 64 extends from a rear end surface of the rotating disc 65, the connecting threaded cylinder 64 is inserted from a front end surface of the sliding block 61 and is in threaded fit with the sliding block, in operation, when the sliding block 61 slides forward, the connecting threaded cylinder 64 rotates relative to the sliding block, so that the rotating disc 65 rotates, and the rubber pads 67 abut against an inner wall of the inner slide 7 to play a role of limiting a position.

As an embodiment of the present invention, the elastic frame structure includes a shaking elastic sheet 42 sleeved on an outer surface of the connecting disc 44, the shaking elastic sheet 42 is fixedly connected to an inner wall of the hidden cavity 24, a protruding portion 43 sleeved on an edge of the connecting disc 44 extends from a side of the shaking elastic sheet 42 close to the connecting disc 44, and the shaking elastic sheet 42 is made of 304 stainless steel, so as to ensure that a good elastic effect can be maintained during operation, and facilitate shaking of the shaking rod 3.

In one embodiment of the present invention, the restoring mechanism includes a plug 56 fixedly connected to the rear end of the shaking rod 3, a fixed soft board 51 extends from the front end of the connecting cylinder 52, the fixed soft board 51 is fixedly connected to the rear end surface of the splicing part 22, an inner convex part 53 extends rearward from the inner wall of the fixed soft board 51, the plug 56 is fixedly inserted into the inner side of the inner convex part 53, a plurality of tentacles 55 extend from the rear end surface of the inner convex part 53, and during operation, the tentacles 55 contact the inner wall of the connecting cylinder 52 to promote the restoration of the position structure of the inner wall.

In one embodiment of the present invention, the soft fixing plate 51, the connecting cylinder 52, the inner protrusion 53 and the antenna 55 are made of rubber, which has a good buffering effect, and the connection between the inner protrusion 53 and the soft fixing plate 51 is provided with a thinned portion 54, which can generate good elasticity, so that the thinned portion 54 ensures that the inner protrusion 53 can easily move synchronously when the packing block 56 shakes, thereby ensuring the effect of restoring the structure.

According to one embodiment of the invention, a contact film 82 extends from the front end edge of a cover cylinder 81, a through hole 84 is formed through the front end surface of the contact film 82, a mounting bolt 83 penetrates through the inner side of the cover cylinder 81, the mounting bolt 83 extends towards the rear and is inserted into the front end of a shaking rod 3, the mounting bolt 83 is in threaded fit with the shaking rod 3, the cover cylinder 81 and the contact film 82 are integrally formed, the cover cylinder 81 and the contact film 82 are both made of 304 stainless steel, the contact film 82 increases the contact area and effectively transmits vibration, the cover cylinder 81 forms a cavity, the cover cylinder 81 can be influenced by the inner side air vibration, and therefore the vibration transmission effect is improved.

Work flow, gas is introduced into the air inlet 12 of the cylinder body 1, so that the piston mechanism 6 drives the telescopic rod 2 to move forwards together, until the clamping end of the positioning workpiece connected with the front end of the telescopic rod 2 abuts against the workpiece, the telescopic rod 2 cannot be pushed continuously, at the moment, the sliding block 61 and the rubber ring 62 are subjected to the action of rear air pressure and slide forwards along the inner side of the annular groove 68, meanwhile, the sliding lug 63 slides along the inner side of the inner slideway 7, and further, the connecting threaded cylinder 64 rotates oppositely, namely, the rotating disc 65 is driven to rotate, so that the rubber pad 67 on the surface of the connecting lug 66 abuts against the inner wall of one side of the inner slideway 7, the thrust in the horizontal direction is converted into the acting force in the vertical direction, the stability of the piston mechanism 6 is increased, the phenomenon that the telescopic rod 2 is unstable is prevented, and the self-locking can be realized by using the mode that the telescopic rod 2 moves by any length, when the workpiece is positioned, the positioning device can flexibly adapt to workpieces with different thicknesses and sizes for positioning; when the telescopic rod 2 extends out of the positioning workpiece, in the processing process of the workpiece such as cutting or drilling, the generated vibration is transmitted to the vibrating rod 3 through the cover cylinder 81 and the contact membrane 82 to a large extent, the connecting disk 44 vibrates in the inner side of the cylindrical cavity 41, the vibrating elastic sheet 42 promotes the vibrating duration of the connecting disk 44, so that the filling block 56 is promoted to vibrate the inner convex part 53, the antenna 55 continuously scrapes the inner wall of the connecting cylinder 52, so that the connecting cylinder 52 is promoted to keep a bulged state, when the telescopic rod 2 moves backwards, the connecting cylinder 52 is contacted with the front end of the contact column 9 to play a buffering effect, in the process of next positioning the workpiece, the restoring mechanism can restore the structure at the connecting cylinder 52 again, the phenomenon that the inner wall of the connecting cylinder 52 is adhered due to one-time buffering extrusion process is avoided, and the buffering effect is guaranteed.

The invention is suitable for a cylinder for fixing a workpiece, simultaneously the workpiece is subjected to processing steps such as cutting, drilling and the like, when the front end of the telescopic rod 2 props against the workpiece and cannot continue to advance, the sliding block 61 on the inner side continues to advance under the air pressure, so that the reversing mechanism rotates to prop against the inner wall of the inner slideway 7, the acting force in the forward direction is converted into the vertical direction, self-locking is realized by means of the friction force between the inner slideways 7, in this way, the self-locking can be realized by that the telescopic rod 2 moves by any length, and the positioning of the workpiece can be flexibly adapted to workpieces with different thicknesses and sizes; according to the invention, when the telescopic rod 2 moves backwards and resets, the connecting cylinder 52 contacts the contact column 9 for buffering, and then when the telescopic rod 2 moves forwards and extends out to abut against a workpiece, the vibration of drilling and cutting is transmitted by the shaking rod 3, and the structure of the connecting cylinder 52 is restored by the restoring mechanism, so that the next buffering effect is ensured, the phenomenon that the inner wall of the damping part is adhered due to a plurality of buffering extrusion processes is avoided, the buffering effect is ensured, and the service life is prolonged.

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.

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.