CN211332355U

CN211332355U - Bilateral positioning cylinder structure and machining positioning jig

Info

Publication number: CN211332355U
Application number: CN201922061929.6U
Authority: CN
Inventors: 屈扬
Original assignee: Shenzhen Dongjie Technology Co ltd
Current assignee: Shenzhen Dongjie Technology Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-08-25
Anticipated expiration: 2029-11-26

Abstract

The utility model relates to the field of mechanical positioning, in particular to a bilateral positioning cylinder structure and a mechanical processing positioning jig, which comprises a cylinder body, a piston rod and a guide piece; a piston cylinder is arranged in the cylinder body, and a cover body is arranged at the opening of the piston cylinder; the piston rod penetrates through the cover body and extends into the piston cylinder, and a piston is sleeved at one end of the piston rod, which extends into the piston cylinder; through holes are formed in two ends of the piston cylinder and are located on two sides of the piston; at least one mounting hole is formed in the cylinder body, the guide piece is arranged in the mounting hole, and the axis of the guide piece is parallel to the axis of the piston rod; the connecting piece is connected with the guide piece and the piston rod, two positioning pieces are arranged on the connecting piece, and the positioning edges of the two positioning pieces form included angles of different degrees and different degrees of 180 degrees; it has solved current two sets of cylinders asynchronous, causes the problem of work piece location back dislocation.

Description

Bilateral positioning cylinder structure and machining positioning jig

Technical Field

The utility model relates to a mechanical positioning field, concretely relates to bilateral location cylinder structure and machining positioning jig.

Background

In the machining positioning and the clamping positioning, an air cylinder positioning and a clamping positioning are generally adopted. For example, in machining, when positioning a quadrangular workpiece, it is necessary to position at least two sides of the workpiece. In an automatic machining or automatic positioning fixture, at least two groups of cylinders are usually adopted to push positioning blocks to position two adjacent edges of a workpiece, so that the workpiece is positioned, and 4 degrees of freedom of the workpiece are limited. However, at present, at least two groups of cylinders are adopted for positioning, so that the two groups of cylinders can not run synchronously, when the cylinders started later push a workpiece to displace, the workpiece can displace in two directions, so that the workpiece is dislocated, and more than two groups of cylinders are adopted for positioning, so that the space of a machine tool workbench is occupied; if the small engraving and milling machine is corresponding, the area of a workbench is small, in order to meet the requirement of workpiece positioning, an additional bottom plate is required to be arranged on the workbench, and the positioning cylinder and the workpiece are arranged on the bottom plate; thereby reducing the stroke of the machine tool and increasing the cost of positioning.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve lies in: the utility model provides a bilateral location cylinder structure and machining positioning jig, solve present quadrangle work piece and adopt two sets of or more than two sets of location cylinders to the problem of work piece location in the location.

In order to solve the technical problem, the technical scheme of the utility model is that: the bilateral positioning cylinder structure comprises a cylinder body, a piston rod and a guide piece; a piston cylinder is arranged in the cylinder body, and a cover body is arranged at the opening of the piston cylinder; the piston rod penetrates through the cover body and extends into the piston cylinder, and a piston is sleeved at one end of the piston rod, which extends into the piston cylinder; through holes are formed in two ends of the piston cylinder and are located on two sides of the piston; at least one mounting hole is formed in the cylinder body, the guide piece is arranged in the mounting hole, and the axis of the guide piece is parallel to the axis of the piston rod; the piston rod positioning device is characterized by further comprising a connecting piece, wherein the connecting piece is connected with the guide piece and the piston rod, two positioning pieces are arranged on the connecting piece, and the positioning edges of the two positioning pieces are at included angles of not 0 degree and 180 degrees.

Furthermore, locate the guide quantity on the cylinder body is two sets of, and is two sets of the guide is located respectively the both sides of piston rod, two sets of the guide is parallel to each other, two the guide all with the connecting piece is connected.

Furthermore, the connecting piece comprises a connecting section and two positioning sections, and the two positioning sections are positioned at two ends of the connecting section; the piston rod is connected with the connecting section, and the guide piece is connected with the corresponding positioning section; the two positioning pieces are respectively arranged on the corresponding positioning sections.

Furthermore, the shape of the cylinder body is rectangular, a plane which is 45 degrees with the side edge of the cylinder body is cut at a right angle of the cylinder body, an opening of the piston cylinder is arranged on the plane, and the axis of the piston cylinder is perpendicular to the plane.

Further, still the cover is equipped with first flexible lag on the piston rod, the one end of first flexible lag is established fixedly on the lid, the other end of first flexible lag with the piston rod is close to the removal fixed connection of connecting piece.

Furthermore, the cover body extends outwards to form a connecting part, and the first telescopic protective sleeve is tightly sleeved on the connecting part; a step position is arranged at one end of the piston rod close to the connecting piece, the connecting sleeve is sleeved on the step position, one end of the connecting sleeve is abutted against the end face of the step position, and the other end of the connecting sleeve is abutted against the connecting piece; the other end of the first telescopic protective sleeve is sleeved on the connecting sleeve; a locking cover locks the first telescopic protective sleeve on the connecting sleeve.

Furthermore, a first exhaust groove is formed in one end, connected with the connecting sleeve, of the piston rod, and one end of the first exhaust groove is communicated with the interior of the first telescopic protective sleeve; the inside wall of connecting piece is equipped with the exhaust breach, the other end of first exhaust groove with the exhaust breach intercommunication.

Furthermore, a step hole is formed in one end, far away from the cover body, of the piston, a cushion pad is arranged in the step hole, the cushion pad extends out of the step hole, and the distance from the extending end face of the cushion pad to the end face of the piston is 0.1-0.5 mm; the end part of the piston rod is sleeved with a limiting sleeve, and the limiting sleeve limits the buffer pad in the stepped hole; the end part of the piston cylinder is provided with a clearance hole for avoiding the limiting sleeve; the two sides of the buffer pad are respectively provided with a plurality of deformation grooves, and the deformation grooves on the two sides of the buffer pad are distributed in a staggered mode.

Further, the guide piece comprises a cylinder body, a guide rod and a sealing plug; the cylinder body is fixedly arranged in the mounting hole, a guide hole is formed in the cylinder body, and the sealing plug is hermetically arranged at one end, far away from the connecting piece, of the guide hole; one end of the guide hole, which is close to the connecting piece, is provided with an annular guide part and an annular groove which extend inwards, and the annular groove and the guide hole are respectively positioned at two sides of the annular guide part; a sealing ring is arranged in the annular groove, one end of the guide rod penetrates through the sealing ring and the central hole of the annular guide part and extends into the guide hole, and one end of the guide rod extending out of the guide hole is fixedly connected with the connecting piece; one end of the guide rod extending out of the guide hole is sleeved with a second telescopic protective sleeve, one end of the second telescopic protective sleeve is sleeved on the cylinder body, and the other end of the second telescopic protective sleeve is fixedly arranged at one end, close to the connecting piece, of the guide rod, so that a protective cavity is formed in the second telescopic protective sleeve.

Furthermore, the end part of the cylinder body is provided with an air hole which is communicated with the guide hole and the second telescopic protective sleeve; a second step position is further arranged at one end of the guide rod connected with the connecting piece, a second connecting sleeve is sleeved on the second step position, one end of the second connecting sleeve is abutted against the end part of the second step position, the other end of the second connecting sleeve is abutted against the inner side wall of the connecting piece, and the second telescopic protective sleeve is tightly sleeved on the second connecting sleeve; the second locking sleeve locks the second telescopic protective sleeve on the second connecting sleeve; a second annular groove is further formed in one end, close to the connecting piece, of the second connecting sleeve, a closed cavity is formed by the second annular groove and the side wall of the connecting piece, a second exhaust groove is formed in the guide rod, and the second exhaust groove is communicated with the closed cavity and a cavity in the second telescopic protective sleeve; the inside wall of connecting piece still is equipped with the second breach of exhausting, the second exhaust breach with seal the die cavity intercommunication, the second breach of exhausting is located the below of guide bar.

Furthermore, one end of the guide rod extending into the guide hole is sleeved with a guide sliding sleeve, and the guide sliding sleeve is in sliding fit with the guide hole; the guide sliding sleeve is provided with a flat position.

Machining positioning jig, include bilateral location cylinder structure, still include the locating plate, the locating plate is located on the cylinder body, be equipped with the absorption hole on the locating plate, the absorption hole is organized the pipeline intercommunication with the negative pressure.

Compared with the prior art, the bilateral positioning cylinder structure has the following beneficial effects:

1. when a workpiece is positioned, fluid (gas or liquid) is introduced into the piston cylinder through one through hole to push the piston to move, so that the piston rod and the connecting piece move, the positioning edges of the two positioning pieces on the connecting piece are in contact with the two side edges of the workpiece, and the positioning edges of the two positioning pieces correct the position of the workpiece, so that the two side edges of the workpiece are respectively attached to the positioning edges of the two positioning pieces, and the workpiece is pushed to the positioning position under the condition that the piston rod continues to move, so that the workpiece is positioned; the problem that when two groups of cylinders are adopted for positioning originally, the two groups of cylinders are asynchronous, so that the workpiece is positioned and then misplaced is solved;

2. the supporting plate for supporting the workpiece can be arranged on the cylinder body, so that the workpiece is positioned on the cylinder body, and the workpiece and the cylinder body are positioned in a superposition mode; the area occupied by the machine tool workbench can be reduced; therefore, the machine tool with a smaller worktable can be selected to machine the workpiece, and the cost of the machining equipment is reduced.

Drawings

FIG. 1 is a perspective view of the double-sided positioning cylinder structure of the present invention;

FIG. 2 is a front view of the double-sided positioning cylinder structure of the present invention;

FIG. 3 is a cross-sectional view of the double-sided positioning cylinder structure of the present invention;

FIG. 4 is an exploded view of the dual-sided positioning cylinder structure of the present invention;

figure 5 is a cross-sectional view of the piston cylinder portion of the double-sided positioning cylinder structure of the present invention;

fig. 6 is a cross-sectional view of the guide of the bilateral positioning cylinder structure of the present invention;

figure 7 is a cross-sectional view of another embodiment of the guide of the bilateral positioning cylinder arrangement of the present invention;

FIG. 8 is a structural diagram of the bottom surface of the bilateral positioning cylinder structure of the present invention;

fig. 9 is a cross-sectional view of the cylinder body of the bilateral positioning cylinder structure of the present invention;

fig. 10 is a structural diagram of the connecting sleeve of the bilateral positioning cylinder structure of the present invention;

FIG. 11 is a block diagram of the cushion of the bilateral positioning cylinder of the present invention;

fig. 12 is a structural diagram of the positioning jig for machining of the present invention.

Detailed Description

The following detailed description will be further described in conjunction with the above-identified drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the concepts underlying the described embodiments. It will be apparent, however, to one skilled in the art, that the described embodiments may be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail.

Referring to fig. 1 to 3, the bilateral positioning cylinder structure includes a cylinder body 1, a piston rod 2 and a guide 3; a piston cylinder 10 is arranged in the cylinder body 1, and a cover body 4 is arranged at the opening of the piston cylinder 10. The piston rod 2 penetrates through the cover body 4 and extends into the piston cylinder 10, and a piston 5 is sleeved at one end of the piston rod 2 extending into the piston cylinder 10; through holes 11 are formed in two ends of the piston cylinder 10, and the two through holes 11 are located on two sides of the piston 5; at least one mounting hole (not shown in the attached drawings) is formed in the cylinder body 1, the guide piece 3 is arranged in the mounting hole, and the axis of the guide piece 3 is parallel to the axis of the piston rod 2. The bilateral positioning cylinder structure further comprises a connecting piece 6, wherein the connecting piece 6 is connected with the guide piece 3 and the piston rod 2, two positioning pieces 7 are arranged on the connecting piece 6, the positioning edges of the positioning pieces 7 are at non-0 degree and 180 degree included angles, and specifically, the included angles of the positioning edges of the positioning pieces 7 are determined according to the included angles of two adjacent edges of a workpiece worker.

In an embodiment of positioning a workpiece in a bilateral positioning cylinder structure, referring to fig. 1 to 3 specifically, when the workpiece is positioned, a fluid (gas or liquid) is introduced into a piston cylinder 10 through one of the through holes 11 to push a piston 5 to move, so that when a piston rod 2 gradually extends into the piston cylinder 10, a connecting member 6 moves towards a cylinder body 1, positioning edges of two positioning members 7 on the connecting member 6 contact with two side edges of the workpiece, and the positioning edges of the two positioning members correct the position of the workpiece, so that the two side edges of the workpiece are respectively attached to the positioning edges of the two positioning members, and the workpiece is pushed to the positioning position under the continuous movement of the piston rod 2, thereby positioning the workpiece; the problem that when two groups of cylinders are adopted for positioning originally, the two groups of cylinders are asynchronous, and the workpiece is positioned and then misplaced is solved. And in the present embodiment, a support plate for supporting a workpiece may be provided on the cylinder block 1, so that the workpiece is positioned on the cylinder block 1, so that the workpiece and the cylinder block are positioned in a superimposed manner; the area occupied by the machine tool workbench can be reduced; therefore, the machine tool with a smaller worktable can be selected to machine the workpiece, and the cost of the machining equipment is reduced.

In another embodiment of positioning a workpiece in a bilateral positioning cylinder structure, when the workpiece is positioned, fluid (gas or liquid) is introduced into a piston cylinder 10 through one of through holes 11 to push a piston 5 to move, so that a piston rod 2 extends out of the piston cylinder 10, a connecting piece 6 moves in a direction away from a cylinder body 1, so that positioning edges of two positioning pieces 7 on the connecting piece 6 of the piston rod 2 are in contact with two side edges of the workpiece, the positioning edges of the two positioning pieces correct the position of the workpiece, so that the two side edges of the workpiece are respectively attached to the positioning edges of the two positioning pieces, and the workpiece is pushed to the positioning position under the condition that the piston rod 2 continues to move, so that the workpiece is positioned; the problem that when two groups of cylinders are adopted for positioning originally, the two groups of cylinders are asynchronous, and the workpiece is positioned and then misplaced is solved.

Further, referring to fig. 1 to 3, the number of the guide members 3 provided on the cylinder body 1 is two, the two sets of the guide members 3 are respectively located on both sides of the piston rod 2, the two sets of the guide members 3 are parallel to each other, and both the two guide members 3 are connected to the connecting member 6. In the embodiment, two groups of guide pieces 3 are adopted to guide the connecting piece 6, so that the stability of the positioning piece 7 in positioning is improved; and adopt two sets of guides 3, and two sets of guides 3 are in the both sides of piston rod 2, consequently, piston rod 2 is at the in-process that stretches out and draws back for its atress is balanced, has avoided the dead problem of card.

Further, the connecting piece 6 comprises a connecting section 60 and two positioning sections 61, and the two positioning sections 61 are located at two ends of the connecting section 60; the piston rod 2 is connected with the connecting section 60, and the guide piece 3 is connected with the corresponding positioning section 61; the two positioning pieces 7 are respectively arranged on the corresponding positioning sections 61. In this embodiment, it is convenient for the two positioning elements 7 to be disposed on the positioning section 61, and the included angle of the two positioning sections 61 is set according to the included angle of the two positioning elements 7.

Further, the included angle between the two positioning blocks 7 is 90 degrees. The embodiment is used for positioning the workpiece with the adjacent edge included angle of 90 degrees.

Further, referring to fig. 1 to 3, the shape of the cylinder body 1 is rectangular, a plane 45 degrees to the side of the cylinder body is cut at a right angle of the cylinder body 1, an opening of the piston cylinder 10 is arranged on the plane, and the axis of the piston cylinder 10 is perpendicular to the plane. In this embodiment, when work piece rectangle or regular quadrangle, when the work piece location was on the location backup pad on cylinder body 1 for location backup pad, work piece and cylinder body 1 do not have the problem of dislocation, thereby reach the backup pad and support completely on cylinder body 1, avoid the location backup pad unsettled, and lead to the work piece in the course of working, receive the cutting force and lead to the problem of location backup pad vibration.

Further, referring to fig. 1 to 5, a first telescopic protecting sleeve 20 is further sleeved on the piston rod 2, one end of the first telescopic protecting sleeve 20 is fixedly sleeved on the cover 4, and the other end of the first telescopic protecting sleeve 20 is fixedly connected with the piston rod 2 near the connecting piece 6. In this embodiment, the first telescopic protection sleeve 20 protects the piston cylinder 10, so that the problem that dust and cutting fluid enter the piston cylinder 10 through a gap between the piston rod 1 and the cover body 4 to cause abrasion due to friction between the dust and the piston cylinder 10 and the piston 5 when a workpiece is machined is avoided, and the inner wall of the piston cylinder 10 is protected.

Further, referring to fig. 4 and 5, a connecting portion 40 extends outward from the cover 4, and the first retractable protecting cover 20 is tightly sleeved on the connecting portion 40; a step position 21 is arranged at one end of the piston rod 2 close to the connecting piece 6, a connecting sleeve 22 is sleeved on the step position 21, one end of the connecting sleeve 22 is abutted against the end face of the step position 21, and the other end of the connecting sleeve is abutted against the inner side wall of the connecting piece 6; the other end of the first telescopic protection sleeve 20 is sleeved on the connecting sleeve 22; a locking sleeve 23 locks the first telescopic protection sleeve 20 to the connection sleeve 22.

Further, referring to fig. 4, 5 and 8, as the piston rod 2 is extended and retracted, the first shield 20 is continuously compressed and extended, however, when the first shield 20 is compressed, the air inside it is compressed, thereby causing the air pressure inside to be greater than the air pressure outside; when the first telescopic protection sleeve 20 is stretched, the air pressure of the first telescopic protection sleeve 20 is in a negative pressure state, so that when the first telescopic protection sleeve 20 is repeatedly compressed and stretched, the first telescopic protection sleeve 20 is easily damaged, and after the first telescopic protection sleeve 20 is damaged, dust and cutting fluid enter the first telescopic protection sleeve 20 and then enter the piston cylinder 10; in order to avoid this problem, in this embodiment, a first exhaust groove 24 is further disposed at one end of the piston rod 2 connected to the connecting sleeve 22, and one end of the first exhaust groove 24 is communicated with the inside of the first telescopic shield 20; the inside wall of connecting piece 6 is equipped with exhaust breach 62, the other end of first exhaust groove 24 with exhaust breach 62 intercommunication. Therefore, when the first telescopic protection sleeve 20 is compressed, the gas in the first telescopic protection sleeve 20 is discharged through the first exhaust groove 24 and the exhaust notch 62, and when the first telescopic protection sleeve 20 is stretched, the gas enters the first telescopic protection sleeve 20 through the exhaust notch, so that the gas pressure in the first telescopic protection sleeve 20 is consistent with the outside, and the first telescopic protection sleeve 20 is protected.

In order to further prevent the cutting fluid and the dust from entering the first telescopic protection sleeve 20, in this embodiment, referring to fig. 4 and 5 in particular, an annular groove 220 is disposed at one end of the connection sleeve 22 close to the connection member 6, the annular groove 220 and the side wall of the connection member 6 form a cavity, the cavity is communicated with the first exhaust groove 24, the exhaust notch 62 is communicated with the cavity, and the exhaust notch 62 is located at the bottom end of the piston rod 2, which also means that the mouth of the exhaust notch 62 is downward; dust is effectively prevented from entering the first protective flexible sleeve 20 when air enters the first protective flexible sleeve 20.

Further, referring to fig. 4 and 11, a step hole is formed in one end of the piston 5, which is far away from the cover 4, a cushion pad 8 is arranged in the step hole, the cushion pad 8 extends out of the step hole, and the distance from the extending end face of the cushion pad 8 to the end face of the piston 5 is 0.1mm to 0.5mm, and more preferably 0.3 mm. A limiting sleeve 80 is sleeved at the end part of the piston rod 2, and the limiting sleeve 80 limits the buffer pad 8 in the stepped hole; the end part of the piston cylinder 10 is provided with a clearance hole 12 for clearance of the stop collar 80. The two sides of the buffer pad 8 are both provided with a plurality of deformation grooves 81, and the deformation grooves 81 on the two sides of the buffer pad 8 are distributed in a staggered manner. In this embodiment, when the two positioning members 7 position the workpiece, the workpiece is positioned by the piston 5 through the stroke of the positioning member 7 accurately positioned by the piston 5. Specifically, when the piston 5 is engaged with the end of the piston cylinder 10, the positioning member 7 is positioned at the machining positioning point of the workpiece. In order to avoid excessive impact of the piston 5 with the end of the piston cylinder 10 during positioning of the piston 5, the piston 5 is therefore cushioned by the cushion pad 8; however, when the piston 5 and the piston cylinder 10 squeeze the buffer pad 8, because the buffer pad 8 is provided with a plurality of deformation grooves 81 which are staggered with each other on two sides, and the deformation grooves 81 enable the buffer pad 8 to form a thin wall, the buffer pad 8 receives squeezing force, and the formed thin wall can be sunken and deformed, so that the buffer pad 8 extends out of the step hole part and can be sunken into the step hole, the piston 5 is enabled to be in contact with the piston cylinder 10, and the piston 5 can determine the stroke of the positioning part 7.

Further, referring to fig. 3, 4 and 6, the guide member 3 includes a cylinder 30, a guide rod 31, and a sealing plug 33. The cylinder 30 is fixedly arranged in the mounting hole, a guide hole 34 is arranged in the cylinder 30, and the sealing plug 33 is hermetically arranged at one end of the guide hole 34 far away from the connecting piece 6. One end of the guide hole 34 close to the connecting piece 6 is provided with an annular guide part 35 extending inwards and an annular groove, and the annular groove and the guide hole 34 are respectively positioned at two sides of the annular guide part 35; a sealing ring 36 is arranged in the annular groove, one end of the guide rod 31 penetrates through the sealing ring 36 and the central hole of the annular guide part 35 and extends into the guide hole 34, and one end of the guide rod 31 extending out of the guide hole 34 is fixedly connected with the connecting piece 6; when the piston rod 2 extends, the guide rod 31 is driven by the connecting piece 6 to extend along the guide part 35, so that the guide effect is achieved. One end of the guide rod 31 extending out of the guide hole 34 is sleeved with a second telescopic protection sleeve 37, one end of the second telescopic protection sleeve 37 is sleeved on the cylinder 30, and the other end of the second telescopic protection sleeve 37 is fixedly arranged at one end of the guide rod 31 close to the connecting piece 6, so that a protection cavity is formed in the second telescopic protection sleeve 37. In this embodiment, the inside of the guide hole 34 is in a closed state through the second telescopic protective sleeve 37 and the sealing plug 33, so that processed dust and cutting fluid are prevented from entering the guide hole 34, and the guide member 3 is protected.

Further, referring to fig. 4 and 7, an air hole 300 is formed at an end of the cylinder 30, and the air hole 300 is communicated with the guide hole 34 and the second telescopic protection sleeve 37. The guide bar 31 with the one end that connecting piece 6 is connected still is equipped with second step position 310, the cover is equipped with second adapter sleeve 311 on the second step position 310, the one end of second adapter sleeve 311 with the tip butt of second step position 310, the other end with the inside wall butt of connecting piece 6, the flexible lag 37 of second tightly overlap in on the second adapter sleeve 311. The second locking sleeve 39 locks the second telescopic protection sleeve 37 on the second connecting sleeve 311; a second annular groove (not shown in the drawings) is further formed in one end, close to the connecting piece, of the second connecting sleeve 311, a closed cavity (not shown in the drawings) is formed by the second annular groove and the side wall of the connecting piece 6, a second exhaust groove 312 is formed in the guide rod 31, and the second exhaust groove 312 is communicated with the closed cavity and a cavity in the second telescopic protective sleeve 37; the inside wall of the connecting piece 6 is also provided with a second exhaust notch 63, the second exhaust notch 63 is communicated with the closed cavity, and the second exhaust notch 63 is positioned below the guide rod 31. When the guide bar 31 stretches into the guide hole 34 gradually, the second telescopic protection sleeve 37 is compressed, because the total cavity of the guide hole 34 is continuously reduced, the gas in the guide hole 34 is continuously discharged to the second telescopic protection sleeve 37 through the air holes 300, and is simultaneously discharged through the second exhaust groove 312 and the second exhaust notch 63, when the second telescopic protection sleeve 37 is stretched, the gas enters the second telescopic protection sleeve 37 and the guide hole 34 through the second exhaust notch 63, so that the gas pressure inside the second telescopic protection sleeve 37 is consistent with the outside, the effect of protecting the second telescopic protection sleeve 37 is achieved, and the phenomenon that the pressure difference inside and outside the second telescopic protection sleeve 37 is continuously changed to cause damage is avoided. And when the guide rod 31 contracts and extends out of the guide hole 34, the second telescopic protection sleeve 37 is continuously compressed and stretched, so that the action force on the piston rod 2 caused by the negative pressure or the positive pressure generated when the guide rod 31 extends into the guide hole 34 and extends out of the guide hole 34 is avoided. Since the second air discharge gap 63 is located below the guide bar 31, it is also possible to effectively prevent oil and dust from entering the guide hole 34.

Further, one end of the guide rod 31 extending into the guide hole 34 is sleeved with a guide sliding sleeve 32, and the guide sliding sleeve 32 is in sliding fit with the guide hole 34. The guide sliding sleeve 32 is provided with flat positions, and the flat positions are used for communicating cavities on two sides of the guide sliding sleeve 37. In this embodiment, the contact area of the guide rod 31 is increased by the guide sliding sleeve 32, so that the guide rod 31 is more stable and smooth in the sliding process.

Machining positioning jig, refer to fig. 12, include bilateral location cylinder structure, still include locating plate 9, locating plate 9 is located on the cylinder body 1, be equipped with the absorption hole on the locating plate 9, absorption hole and negative pressure mechanism pipeline intercommunication.

The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.

Claims

1. The bilateral positioning cylinder structure comprises a cylinder body, a piston rod and a guide piece; a piston cylinder is arranged in the cylinder body, and a cover body is arranged at the opening of the piston cylinder; the piston rod penetrates through the cover body and extends into the piston cylinder, and a piston is sleeved at one end of the piston rod, which extends into the piston cylinder; through holes are formed in two ends of the piston cylinder and are located on two sides of the piston; the piston rod structure is characterized in that at least one mounting hole is formed in the cylinder body, the guide piece is arranged in the mounting hole, and the axis of the guide piece is parallel to the axis of the piston rod; the piston rod positioning device is characterized by further comprising a connecting piece, wherein the connecting piece is connected with the guide piece and the piston rod, two positioning pieces are arranged on the connecting piece, and the positioning edges of the two positioning pieces are at included angles of not 0 degree and 180 degrees.

2. The bilateral positioning cylinder structure of claim 1, wherein the number of the guiding members disposed on the cylinder body is two, the two guiding members are respectively disposed on two sides of the piston rod, the two guiding members are parallel to each other, and both the guiding members are connected to the connecting member.

3. The bilateral positioning cylinder structure according to claim 1 or 2, wherein the connecting member comprises a connecting section and two positioning sections, the two positioning sections being located at two ends of the connecting section; the piston rod is connected with the connecting section, and the guide piece is connected with the corresponding positioning section; the two positioning pieces are respectively arranged on the corresponding positioning sections.

4. A bilateral positioning cylinder structure as claimed in claim 2 wherein said cylinder body has a rectangular shape, a right angle of said cylinder body has a plane 45 ° to a side of said cylinder body, said opening of said piston cylinder is formed on said plane, and an axis of said piston cylinder is perpendicular to said plane.

5. The bilateral positioning cylinder structure of claim 1, wherein the piston rod is further sleeved with a first telescopic shield, one end of the first telescopic shield is fixedly sleeved on the cover, and the other end of the first telescopic shield is fixedly connected to the piston rod near the moving part of the connecting member.

6. The bilateral positioning cylinder structure of claim 5 wherein said cover extends laterally outwardly to define a connecting portion, said first telescoping shield tightly fitting over said connecting portion; a step position is arranged at one end of the piston rod close to the connecting piece, the connecting sleeve is sleeved on the step position, one end of the connecting sleeve is abutted against the end face of the step position, and the other end of the connecting sleeve is abutted against the connecting piece; the other end of the first telescopic protective sleeve is sleeved on the connecting sleeve; a locking cover locks the first telescopic protective sleeve on the connecting sleeve.

7. The bilateral positioning cylinder structure as claimed in claim 6, wherein a first exhaust groove is further provided at an end of the piston rod connected to the connecting sleeve, and an end of the first exhaust groove is communicated with an inside of the first telescopic shield; the inside wall of connecting piece is equipped with the exhaust breach, the other end of first exhaust groove with the exhaust breach intercommunication.

8. The bilateral positioning cylinder structure of claim 1, wherein the piston has a stepped hole at an end thereof away from the cover, a cushion pad is disposed in the stepped hole, the cushion pad extends out of the stepped hole, and the distance from the extending end surface of the cushion pad to the end surface of the piston is 0.1mm to 0.5 mm; the end part of the piston rod is sleeved with a limiting sleeve, and the limiting sleeve limits the buffer pad in the stepped hole; the end part of the piston cylinder is provided with a clearance hole for avoiding the limiting sleeve; the two sides of the buffer pad are respectively provided with a plurality of deformation grooves, and the deformation grooves on the two sides of the buffer pad are distributed in a staggered mode.

9. The bilateral positioning cylinder structure of claim 1 wherein the guide comprises a barrel, a guide rod, and a sealing plug; the cylinder body is fixedly arranged in the mounting hole, a guide hole is formed in the cylinder body, and the sealing plug is hermetically arranged at one end, far away from the connecting piece, of the guide hole; one end of the guide hole, which is close to the connecting piece, is provided with an annular guide part and an annular groove which extend inwards, and the annular groove and the guide hole are respectively positioned at two sides of the annular guide part; a sealing ring is arranged in the annular groove, one end of the guide rod penetrates through the sealing ring and the central hole of the annular guide part and extends into the guide hole, and one end of the guide rod extending out of the guide hole is fixedly connected with the connecting piece; one end of the guide rod extending out of the guide hole is sleeved with a second telescopic protective sleeve, one end of the second telescopic protective sleeve is sleeved on the cylinder body, and the other end of the second telescopic protective sleeve is fixedly arranged at one end, close to the connecting piece, of the guide rod, so that a protective cavity is formed in the second telescopic protective sleeve.

10. The bilateral positioning cylinder structure of claim 9, wherein an air hole is formed at an end of the cylinder body, and the air hole is communicated with the guide hole and the second telescopic protection sleeve; a second step position is further arranged at one end of the guide rod connected with the connecting piece, a second connecting sleeve is sleeved on the second step position, one end of the second connecting sleeve is abutted against the end part of the second step position, the other end of the second connecting sleeve is abutted against the inner side wall of the connecting piece, and the second telescopic protective sleeve is tightly sleeved on the second connecting sleeve; the second locking sleeve locks the second telescopic protective sleeve on the second connecting sleeve; a second annular groove is further formed in one end, close to the connecting piece, of the second connecting sleeve, a closed cavity is formed by the second annular groove and the side wall of the connecting piece, a second exhaust groove is formed in the guide rod, and the second exhaust groove is communicated with the closed cavity and a cavity in the second telescopic protective sleeve; the inside wall of connecting piece still is equipped with the second breach of exhausting, the second exhaust breach with seal the die cavity intercommunication, the second breach of exhausting is located the below of guide bar.

11. The bilateral positioning cylinder structure of claim 9, wherein a guide sliding sleeve is sleeved on one end of the guide rod extending into the guide hole, and the guide sliding sleeve is in sliding fit with the guide hole; the guide sliding sleeve is provided with a flat position.

12. A machining positioning jig is characterized by comprising the bilateral positioning cylinder structure according to any one of claims 1-10 and further comprising a positioning plate, wherein the positioning plate is arranged on the cylinder body, and an adsorption hole is formed in the positioning plate and communicated with a negative pressure mechanism pipeline.