CN203560199U

CN203560199U - Buffering rotary cylinder

Info

Publication number: CN203560199U
Application number: CN201320750186.3U
Authority: CN
Inventors: 朱成英
Original assignee: NINGBO YAJI ELECTROMECHANICAL TECHNOLOGY Co Ltd
Current assignee: NINGBO YAJI ELECTROMECHANICAL TECHNOLOGY Co Ltd
Priority date: 2013-11-25
Filing date: 2013-11-25
Publication date: 2014-04-23
Anticipated expiration: 2023-11-25

Abstract

The utility model relates to the technical field of rotary cylinders, in particular to a buffering rotary cylinder. The buffering rotary cylinder comprises a cylinder body, a bottom cover arranged on a bottom opening of the cylinder body, and a piston rod penetrating through an end cover of the cylinder body, wherein a rotary shaft and a piston ring arranged on the rotary shaft in a sleeved mode are arranged in the cylinder body, a blind hole is formed in the inner end of the piston rod, and the inner end of the piston rod is arranged on the rotary shaft in a sleeved mode and is connected with the piston ring; one or more helical grooves identical in rotating direction and helix angle are formed in the outer edge of the rotary shaft, one or more balls matched with the helical grooves are arranged on the piston ring, a circular truncated cone is arranged at the front end of the rotary shaft, and a buffer spring is buckled on the circular truncated cone. The buffering rotary cylinder is reasonable and compact in structure. When the piston ring falls down carrying a workpiece, part of impact is counteracted by the buffer spring, and then the speed is reduced and the phenomenon that the workpiece comes out due to excessive impact is avoided, meanwhile, impact and noise generated from collision between the piston ring and the cylinder body and the bottom cover are reduced, the stability of the whole structure is improved, and the service life is prolonged.

Description

A kind of buffering swing clamp cylinder

Technical field

The utility model relates to swing clamp cylinder technical field, particularly a kind of buffering swing clamp cylinder.

Background technique

Cylinder is in Pneumatic Transmission, the pressure energy of pressurized gas to be converted to the pneumatic apparatus of mechanical energy, and the kind of cylinder is a lot, and swing clamp cylinder is wherein that a kind of piston shaft carries out the cylinder of axial-rotation in straight reciprocating motion simultaneously.At present, common swing clamp cylinder has pinion and-rack, linkage type and ball type, and the stability of pinion and-rack swing clamp cylinder and linkage type swing clamp cylinder is better, applies more on some complicated equipment, but because its complex structure, manufacture difficulty are high, cause cost bigger than normal.Therefore and the structure of ball type swing clamp cylinder is relatively simple, cost is also lower, a lot of in various applications.

Ball type swing clamp cylinder generally comprises cylinder body, piston, connecting rod, running shaft, has spiral chute on running shaft, and on running shaft, cover has axle sleeve, has the groove corresponding with spiral chute on the inwall of axle sleeve, is provided with interlock ball in groove and spiral chute.In piston movement process, axle sleeve is subject to the effect of ball to rotate and drive piston to rotate along spiral chute.The swing clamp cylinder of this structure, need to be at axle sleeve inner side fluting when producing, and difficulty of processing is larger, and the quality of fit of axle sleeve and running shaft is not high, affects stability and the working life of cylinder; Piston affects by force in the reciprocating stroke medium velocity pump pressure of being bullied, and linear speed is often very fast, very unfavorable for the stability of clamping device.Therefore, there is the usability of current structure being improved to improve cylinder.

Model utility content

The purpose of this utility model is for the defect of prior art and deficiency, a kind of compact structure is provided, uses stable, the simple buffering of assembling swing clamp cylinder.

For achieving the above object, the utility model is by the following technical solutions:

A kind of buffering swing clamp cylinder described in the utility model, comprise cylinder body, be located at bottom on the opening of cylinder body bottom surface, be arranged in the piston rod in cylinder end caps, in cylinder body, be provided with running shaft and be sheathed on the piston ring on running shaft, piston rod inner end offers blind hole, piston rod inner end is sheathed on running shaft and with piston ring and connects: the outer rim of described running shaft is provided with the spiral chute that one or several sense of rotation are consistent, spiral angle is identical, piston ring is provided with one or several balls coordinating with spiral chute, and running shaft tail end is connected with bottom; Running shaft front end is provided with round platform, and on round platform, button is provided with damping spring.

Further, in described piston ring, be provided with axle sleeve, have one or several through holes corresponding with spiral chute on the inwall of axle sleeve, between axle sleeve and piston ring, be equipped with connecting pin, half of ball is placed in through hole, and second half of ball is placed in spiral chute.

Further, on described running shaft tail end, have the pin-and-hole of vertical its shaft axis, on bottom, have the attachment hole concentric with the shaft axis of running shaft and the positioning hole coordinating with pin-and-hole, the tail end of running shaft inserts in attachment hole and pin-and-hole and positioning hole and is equipped with bearing pin.

Further, in the outer rim of described running shaft tail end and bottom, be all arranged with seal ring.

Further, the outer end of described piston rod is provided with swing arm.

The utility model beneficial effect is: the utility model compactness rational in infrastructure, and piston ring, when carrying workpiece whereabouts, has damping spring to offset a part and impacts, and then reduce the speed of moving, and avoids impacting the excessive workpiece that causes and flies out; The impact and the noise that reduce the collision generation of piston ring and cylinder body, bottom improve integrally-built stability and working life simultaneously.

Accompanying drawing explanation

Fig. 1 is whole interior structural representation of the present utility model.

In figure:

10, cylinder body; 20, bottom; 21, attachment hole; 22, positioning hole;

23, bearing pin; 24, plug hole; 30, piston rod; 31, piston ring;

32, ball; 33, axle sleeve; 34, through hole; 35, seal ring;

36, swing arm; 37, connecting pin; 40, running shaft; 41, spiral chute;

42, pin-and-hole; 43, round platform; 44, damping spring.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described.

A kind of buffering swing clamp cylinder described in the utility model, comprise cylinder body 10, be located at bottom 20 on cylinder body 10 bottom surface openings, be arranged in the piston rod 30 on cylinder body 10 end caps, in cylinder body 10, be provided with running shaft 40 and be sheathed on the piston ring 31 on running shaft 40, piston rod 30 inner ends offer blind hole, and piston rod 30 inner ends are sheathed on running shaft 40 and with piston ring 31 and are connected; The outer rim of described running shaft 40 is provided with the spiral chute 41 that one or several sense of rotation are consistent, spiral angle is identical, piston ring 31 is provided with one or several balls 32 coordinating with spiral chute 41, piston ring 31 coordinates with spiral chute 41 by ball 32 and then realizes spiral lifting on running shaft 40, and drive the reciprocal lifting of piston rod 30 and rotate back and forth, the angle of swing of piston ring 31 is controlled by the spiral amplitude of spiral chute 41.

In above-mentioned piston ring 31, be provided with axle sleeve 33, on the inwall of axle sleeve 33, have one or several through holes corresponding with spiral chute 41 34, through hole 34 is for accommodating ball 32, in through hole 34, store lubricant oil so that ball 32 rotates within it, and then when axle sleeve 33 is during with piston ring 31 lifting, ball 32 is subject to spiral chute 41 tractions and axle sleeve 33 is rotated; Between axle sleeve 33 and piston ring 31, be equipped with connecting pin 37, connecting pin 37 is synchronized with the movement for connecting bushing 33 and piston ring 31, and half of ball 32 is placed in through hole 34, and second half of ball 32 is placed in spiral chute 41.

On above-mentioned running shaft 40 tail ends, have the pin-and-hole 42 of vertical its shaft axis, the positioning hole 22 that has the attachment hole 21 concentric with the shaft axis of running shaft 40 on bottom 20 and coordinate with pin-and-hole 42, the tail end of running shaft 40 inserts in attachment hole 21 and pin-and-hole 42 and positioning hole 22 and is equipped with bearing pin 23; Cylinder body 10 is provided with the plug hole 24 corresponding with positioning hole 22, in plug hole 24, is provided with plug screw; The tail end of running shaft 40 inserts after attachment hole 21, bearing pin 23 is through pin-and-hole 42 and positioning hole 22, and then make running shaft 40 and bottom 20 structure that links into an integrated entity, after bottom 20 packs cylinder body 10 bottom surface openings into, plug screw penetrates plug hole 24 and positioning hole 22, and bottom 20 and cylinder body 10 are become one structure.

In the outer rim of above-mentioned running shaft 40 tail ends and bottom 20, be all arranged with seal ring 35, seal ring 35 is for keeping making the tightness of connection between running shaft 40, bottom 20 and cylinder body 10.The outer end of above-mentioned piston rod 30 is provided with swing arm 36, and swing arm 36 is moved for the rotation and lifting of conductive plug bar 30, and realizes transfer action by the clamping device being arranged in swing arm 36.

Above-mentioned running shaft 40 front ends are provided with round platform 43, on round platform 43, button is provided with damping spring 44, damping spring 44 links into an integrated entity by round platform 43 with running shaft 40, and then when piston ring 31 and piston rod 30 move down, damping spring 44 is offset a part of impact force, piston rod 30 motions are slowed down, thereby the movement velocity that is clamped in the workpiece in swing arm 36 is slowed down, avoid too fast speed that workpiece is come off.

The above is only better embodiment of the present utility model, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.

Claims

1. one kind is cushioned swing clamp cylinder, comprise cylinder body (10), be located at bottom (20) on the opening of cylinder body (10) bottom surface, be arranged in the piston rod (30) on cylinder body (10) end cap, in cylinder body (10), be provided with running shaft (40) and be sheathed on the piston ring (31) on running shaft (40), piston rod (30) inner end offers blind hole, and piston rod (30) inner end is sheathed on running shaft (40) above and is connected with piston ring (31); It is characterized in that: the outer rim of described running shaft (40) is provided with the spiral chute that one or several sense of rotation are consistent, spiral angle is identical (41), piston ring (31) is provided with one or several balls (32) coordinating with spiral chute (41), and running shaft (40) tail end is connected with bottom (20); Running shaft (40) front end is provided with round platform (43), and the upper button of round platform (43) is provided with damping spring (37).

2. buffering swing clamp cylinder according to claim 1, it is characterized in that: in described piston ring (31), be provided with axle sleeve (33), on the inwall of axle sleeve (33), have one or several through holes (34) corresponding with spiral chute (41), between axle sleeve (33) and piston ring (31), be equipped with connecting pin (37), half of ball (32) is placed in through hole (34), and second half of ball (32) is placed in spiral chute (41).

3. buffering swing clamp cylinder according to claim 1, it is characterized in that: the pin-and-hole (42) that has vertical its shaft axis on described running shaft (40) tail end, on bottom (20), have the attachment hole (21) concentric with the shaft axis of running shaft (40) and the positioning hole (22) coordinating with pin-and-hole (42), the tail end of running shaft (40) inserts in attachment hole (21) and pin-and-hole (42) and positioning hole (22) and is equipped with bearing pin (23).

4. buffering swing clamp cylinder according to claim 3, is characterized in that: in the outer rim of described running shaft (40) tail end and bottom (20), be all arranged with seal ring (35).

5. buffering swing clamp cylinder according to claim 1, is characterized in that: the outer end of described piston rod (30) is provided with swing arm (36).