CN216519320U - Piston clearance adjusting device of pressure machine brake - Google Patents

Abstract

The application relates to a piston clearance adjusting device of a press brake, belonging to the field of press braking, wherein the brake comprises a brake seat, a cylinder body, a piston ring and a sealing ring, the lower semi-circumference side surface of the brake seat is provided with a mounting hole along the radial direction, the mounting hole is communicated with the cylinder body, a regulating part is arranged in the mounting hole, the regulating part is provided with a connecting part, and the regulating part is connected with the brake seat through the connecting part; the piston ring is upwards supported by the adjusting piece, so that the phenomenon that the piston ring is excessively extruded with the lower half circumferential surface of the cylinder body due to the action of gravity to cause an overlarge gap between the piston ring and the working circumferential surface of the cylinder body can be avoided. The piston ring is supported upwards through the adjusting piece, so that the piston ring can be prevented from generating the lateral deviation phenomenon, and the failure of the functional failure of the brake caused by the unilateral damage of the sealing ring on the piston ring is reduced.

Description

Piston clearance adjusting device of pressure machine brake

Technical Field

The utility model relates to the technical field of press machine braking, in particular to a device for adjusting a piston clearance of a press machine brake.

Background

The conventional press product brake assembly is generally installed at the shaft end of an eccentric shaft or a transmission shaft of a press, as shown in fig. 1, and the brake mainly comprises a brake seat a, a piston b, a sealing ring c and a sealing ring d. The piston b is arranged in the cylinder body of the brake seat a, the piston b is tightly matched with an inner hole and an outer circle of the cylinder to form a sealed air cavity, and finally the brake and the loosening working process of the brake are completed through the air supply and discharge actions. However, the piston of the above brake is often affected by its own gravity, so that the piston naturally falls down, which causes the piston and the cylinder to laterally deviate in the circumferential direction, mainly in the lateral deviation towards the lower side of the cylinder, especially for some medium and large-sized presses, the piston has large volume and weight, which more easily causes the downward lateral deviation of the piston, and in the past, the faults of unilateral damage of the sealing ring and the functional failure of the brake may occur. There are also some high precision press machines with high stability and reliability of braking performance, and the fit clearance between the braking piston and the cylinder may affect the normal working process of the press machine.

SUMMERY OF THE UTILITY MODEL

The application is for solving the piston of the stopper of current press because the effect of gravity leads to the piston and the cylinder body at the circumferencial direction lateral deviation, mainly shows the lateral deviation in the cylinder body downside, can appear the unilateral damage of sealing washer and the trouble of stopper functional failure down for a long time, designs a press brake piston clearance adjusting device, and the technical scheme of its concrete adoption is:

the utility model provides a piston clearance adjusting device of press brake, the stopper includes the stopper seat, the cylinder body, piston ring and sealing washer, the cylinder body is the annular, the cylinder body sets up in the stopper seat, the piston ring activity sets up in the cylinder body, the side of the circumference side contact of piston ring and cylinder body is equipped with the sealing washer respectively, the piston ring, the cylinder body forms inclosed air cavity with the sealing washer, the lower half circumference side of stopper seat is equipped with the mounting hole along its footpath, the mounting hole communicates with the cylinder body, be equipped with the regulating part in the mounting hole, the regulating part has connecting portion, the regulating part passes through connecting portion and is connected with the stopper seat.

Preferably, the adjusting member includes:

one end of the propping piece penetrates into the mounting hole and is abutted against the piston ring, and the other end of the propping piece supports a cap which is connected with the brake seat;

the adjusting pad is arranged between the bearing cap and the brake seat.

Preferably, the position that the outer circumference lateral wall of piston ring corresponds the mounting hole is equipped with the blind hole, and the regulating part still includes:

the compact heap, the compact heap sets up in the blind hole, and the one end and the compact heap butt of stretching into the mounting hole of top retainer.

Preferably, a lubricating oil cavity is arranged between the jacking piece and the piston ring and is communicated with a lubricating oil channel arranged on the jacking piece.

Preferably, the surface of the top tightening piece, which is abutted to the piston ring, is provided with a lubricating oil groove, and a lubricating oil cavity is formed between the lubricating oil groove and the piston ring; or the lubricating oil groove is arranged on the surface of the piston ring, which is abutted to the abutting part, and a lubricating oil cavity is formed between the lubricating oil groove and the piston ring.

Preferably, the lubricating oil groove comprises a first oil sub-groove along the axial direction of the piston ring and a plurality of second oil sub-grooves perpendicular to the first oil sub-groove, and the first oil sub-groove, the second oil sub-groove and the lubricating oil channel are communicated.

Preferably, two mounting holes and two adjusting pieces are arranged respectively, and a perpendicular bisector of a connecting line of the two mounting holes penetrates through the lowest point of the brake seat and the circle center of the brake seat.

Preferably, the included angle between the two mounting holes is between 40 and 90 degrees.

Preferably, the two sealing rings are connected through a connecting piece, the connecting piece is provided with a connecting hole, the end face of the piston ring is provided with a threaded hole, and a threaded connecting piece is connected in the connecting hole and the threaded hole so as to connect the connecting piece to the piston ring.

According to the utility model, the installation hole is formed in the lower semi-circumference side surface of the brake seat, the adjusting piece is installed in the installation hole, and the piston ring is upwards supported by the adjusting piece, so that the phenomenon that the piston ring is excessively extruded with the lower semi-circumference surface of the cylinder body due to the action of gravity, and the gap between the piston ring and the working circumferential surface of the cylinder body is too large can be avoided. The piston ring is supported upwards through the adjusting piece, so that the piston ring can be prevented from generating the lateral deviation phenomenon, and the failure of the functional failure of the brake caused by the unilateral damage of the sealing ring on the piston ring is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a conventional press brake;

FIG. 2 is a front view of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is an enlarged view taken at I in FIG. 2;

FIG. 5 is a schematic view of the structure of the conditioner mat;

FIG. 6 is a schematic view of the top member;

FIG. 7 is a cross-sectional view B-B of FIG. 6;

FIG. 8 is a front view of the compact;

fig. 9 is a left side view of the compact.

In the figure, 1, a brake seat, 2, a cylinder body, 3, an inner sealing ring, 4, a piston ring, 5, an air cavity, 6, an adjusting piece, 601, a jacking piece, 602, a pressing block, 603, an adjusting pad, 7, a connecting sheet, 8, an outer sealing ring, 9, a lubricating oil channel, 10, a blind hole, 11, a mounting hole, 12, a bolt hole, 13 and a lubricating oil groove.

Detailed Description

In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.

In addition, in the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1 to 9, the present application is a piston gap adjusting device of a press brake, and the brake includes a brake base 1, a cylinder body 2, a piston ring 4 and a seal ring. In the present embodiment, for convenience of description, the sealing ring with a large diameter is referred to as an outer sealing ring 8, the sealing ring with a small diameter is referred to as an inner sealing ring 3, the inner sealing ring 3 is disposed between the inner annular surface of the cylinder body 2 and the piston ring 4, and the outer sealing ring 8 is disposed between the outer annular surface of the cylinder body 2 and the piston ring 4. The piston ring 4 is movably arranged in the cylinder body 2, and the piston ring 4 and the cylinder body 2 are sealed by the inner sealing ring 3 and the outer sealing ring 8, so that a sealed air cavity 5 is formed among the piston ring 4, the cylinder body 2 and the sealing rings, and the piston ring 4 is promoted to slide in the cylinder body 2 by introducing and deflating the sealed air cavity 5, thereby promoting the brake to realize the working process of braking and releasing.

However, in some relatively middle and large-sized equipment fields, the weight and the volume of the piston ring 4 are large, so that the piston ring 4 may be excessively pressed against the lower semi-circumference surface of the cylinder 2 under the action of gravity, and the piston ring 4 has a large lateral deviation with the upper semi-circumference surface of the cylinder 2, in order to reduce the lateral deviation of the piston ring 4, a mounting hole 11 is formed in the lower semi-circumference side surface of the brake seat 1 along the radial direction, the mounting hole 11 penetrates through the housing of the brake seat 1 and extends to the circumferential side surface of the cylinder 2, so that the mounting hole 11 is communicated with the cylinder 2, an adjusting piece 6 is arranged in the mounting hole 11, the adjusting piece 6 has a connecting part, the connecting part is a bolt hole 12, a bolt can penetrate through the bolt hole 12 to fix the adjusting piece 6 on the brake seat 1, and the adjusting piece 6 can extend into the mounting hole 11, and the connecting part is connected with the brake seat 1. The adjusting part 6 can carry out effectual adjustment control to the fit clearance of piston in the stopper at the circumferencial direction, plays the effect of bearing piston, eliminates the piston and leads to the phenomenon serious of unilateral wearing and tearing that the sideslip of sealing washer and take place because of the dead weight for the pressure machine stopper operation is more safe and stable, and the fault rate is by greatly reduced.

Further, the specific structure for the above-mentioned adjusting member 6 includes a holding member 601 and an adjusting pad 603. The top member 601 is substantially similar to a bolt except that it is not threaded unlike a bolt, the shank of which is a polish rod shank, one end of the top member 601 penetrates into the mounting hole 11 and abuts against the circumferential side of the piston ring 4, and the other end of the top member 601 has a bearing cap which bears against the circumferential side of the brake seat 1. The adjusting pad 603 is disposed between the support cap and the circumferential side surface of the brake base 1, the bolt hole 12 of the adjusting member 6 is disposed at the position of the support cap, and after the adjusting pad 603 is disposed between the support cap and the brake base 1, the entire holding member 601 is fixed to the brake base 1 by using the bolt hole 12 of the support cap and the internal through bolt.

During specific adjustment, the specific thickness of the adjusting pad 603 is changed, and then the depth of the jacking piece 601 extending into the mounting hole 11 is changed to change the height for supporting the piston ring 4, so that the gap between the piston ring 4 and the cylinder body 2 is adjusted. The adjusting pad 603 here is rigid and may require different thickness adjusting pads for adjustment of the piston ring 4 for each driver, machined as required.

Furthermore, the outer circumferential side wall of the piston ring 4 is provided with a blind hole 10 at a position corresponding to the mounting hole 11, and the adjusting member 6 further comprises a pressing block 602. The hold-down block 602 can be placed in the blind hole 10, in which case the end of the above-mentioned top member 601 that protrudes into the mounting hole 11 abuts the hold-down block 602. By arranging the blind hole 10 on the piston ring 4 and placing the pressing block 602 in the blind hole 10, compared with the above-mentioned direct contact between the top member 601 and the piston ring 4, the contact area between the top member 601 and the piston ring 4 can be increased, the stress between the top member 601 and the piston ring 4 can be reduced, and the deformation of the piston ring 4 can be reduced.

Further, in order to ensure that the tightening member 601 can also generate relative movement with the piston ring 4 when tightening with the piston ring 4, i.e., reduce the friction with the piston ring 4, a lubricating oil chamber is provided between the tightening member 601 and the piston ring 4, and the lubricating oil chamber is communicated with a lubricating oil passage 9 provided on the tightening member 601. The friction force between the holding-up member 601 and the piston ring 4 is reduced by periodically filling the lubricating oil into the lubricating oil passage 9, and at this time, after the gas is introduced into and discharged from the closed gas chamber 5, the piston ring 4 is relatively easily moved in the cylinder 2.

Further, one of the specific setting modes of the lubricating oil cavity is as follows: a lubricating oil groove 13 is formed in a surface of the tightening member 601 abutting against the piston ring 4, and a lubricating oil chamber is formed between the lubricating oil groove 13 and the piston ring 4.

The second one is: the lubricating oil groove 13 may be provided on the surface of the piston ring 4 abutting against the retainer 601, and a lubricating oil chamber is formed between the lubricating oil groove 13 and the piston ring 4.

In the embodiment where the top member 601 abuts against the pressing block 602, the lubricating oil chamber is formed between the top member 601 and the pressing block 602, and the lubricating oil groove 13 is provided on the surface of the top member 601 abutting against the pressing block 602; secondly, the lubricating oil groove 13 is formed in the surface, pressed against the pressing piece 601, of the pressing block 602. However, in any case, the lubricating oil passage 9 is disposed on the tightening member 601 because the tightening member 601 is partially exposed to the outside and the lubricating oil passage 9 is disposed thereon to facilitate the addition of the lubricating oil into the lubricating oil passage 9.

Further, the lubricating oil groove 13 comprises a first oil sub-groove along the axial direction of the piston ring 4 and a plurality of second oil sub-grooves perpendicular to the first oil sub-groove, and the first oil sub-groove, the second oil sub-groove and the lubricating oil channel 9 are communicated with each other. This can increase the flow range of the lubricating oil, and the whole surface of the top member 601 and the pressing block 602 is covered as much as possible, or the whole surface of the top member 601 directly contacting with the piston ring 4 is convenient, so that the lubricating effect is improved, and the friction between the two is reduced.

Further, in one embodiment, two mounting holes 11 and two adjusting pieces 6 are arranged, and a perpendicular bisector of a connecting line of the two mounting holes 11 passes through a lowest point of the brake seat 1 and a circle center of the brake seat 1. Mounting hole 11 sets up two and the symmetry sets up can be when holding up piston ring 4, can also play spacing effect in week, two tight pole symmetries set up piston ring 4 and hold up by holding up piece 601 the effort of piston ring 4 at vertical component effect, simultaneously, two holding up piece 601 are relative in the direction of two component forces of horizontal direction to piston ring 4, so, can guarantee to avoid piston ring 4 self circumference rotation when holding up piston ring 4 under the effect of two component forces, improve piston ring 4's stability.

Furthermore, for the two mounting holes 11, the arrangement position of the two mounting holes 11 on the brake seat 1 is that the included angle between the two mounting holes 11 is between 40 and 90 degrees, i.e. the angle between the single mounting hole 11 and the vertical plane of the brake seat 1 is between 20 deg. and 45 deg., the reason for this is to ensure that the force of the top member 601 acting on the piston ring 4 has a greater component in the vertical direction than in the horizontal direction, since the action of the top member 601 is here mainly to lift the piston ring 4, and not mainly to ensure that it remains stable when lifted, but at the same time, the stability of the piston ring 4 during the lifting is ensured, and the piston ring is prevented from rotating, so the force of the top clamping piece 601 on the piston ring 4 in the vertical direction is not too large, the above range is intended to ensure that the piston ring 4 is not rotated when being lifted, and the maximum component force can be applied to the purpose of lifting the piston ring 4. At 45 °, the vertical component of the force applied to the piston ring 4 by the top member 601 is equal to the horizontal component, and therefore 45 ° is the boundary between the two components.

Furthermore, in addition to the above-mentioned way to adjust the clearance of piston ring 4 in cylinder 2 to reduce the lateral deviation of piston ring 4, further reduce the degree that the unilateral damage appears in the lower side because of the lateral deviation leads to interior sealing washer 3 and outer sealing washer 8, still connect through connection piece 7 between above-mentioned interior sealing washer 3 and outer sealing washer 8, connection piece 7 has the connecting hole, the terminal surface of piston ring 4 has the screw hole, connecting hole and screw hole in-connection have the screwed connection spare, in order to connect connection piece 7 to piston ring 4, so connection piece 7 connects two sealing washers together, connects on piston ring 4 simultaneously. So, the sealing washer that is located the downside just can provide ascending pulling force by the sealing washer of upside under the effect of connection piece 7, reduces its tenesmus to reduce the wearing and tearing of this side sealing washer, thereby reduce and lead to the possibility of inclosed air cavity 5 gas leakage because of the sealing washer damages, because, in case the air cavity 5 gas leakage then be that the stopper braking stroke is not enough, in the serious time, lead to the problem of stopper functional failure.

The above-described embodiments should not be construed as limiting the scope of the utility model, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.

The present invention is not described in detail, but is known to those skilled in the art.

Claims (9)

1. A piston clearance adjusting device of a press brake comprises a brake seat, a cylinder body, a piston ring and a sealing ring, wherein the cylinder body is annular, the cylinder body is arranged on the brake seat, the piston ring is movably arranged on the cylinder body, the side surfaces of the piston ring, which are contacted with the circumferential side surface of the cylinder body, are respectively provided with the sealing ring, and the piston ring, the cylinder body and the sealing ring form a closed air cavity,

the lower half circumference side of the brake seat is provided with a mounting hole along the radial direction, the mounting hole is communicated with the cylinder body, an adjusting piece is arranged in the mounting hole, the adjusting piece is provided with a connecting part, and the adjusting piece is connected with the brake seat through the connecting part.

2. The piston lash adjustment device of a press brake of claim 1, wherein the adjustment member comprises:

the top piece is inserted into the mounting hole at one end and abutted against the piston ring, and the other end of the top piece supports a cap which is connected to the brake seat;

the adjusting pad is arranged between the bearing cap and the brake seat.

3. The piston gap adjusting apparatus of a press brake as claimed in claim 2, wherein the outer circumferential side wall of the piston ring is provided with a blind hole at a position corresponding to the mounting hole, and the adjusting member further comprises:

the pressing block is arranged in the blind hole, and one end of the jacking piece, which extends into the mounting hole, is abutted against the pressing block.

4. The piston lash adjusting device of a press brake as claimed in claim 2 or 3, wherein a lubricating oil chamber is provided between the tightening member and the piston ring, the lubricating oil chamber communicating with a lubricating oil passage provided in the tightening member.

5. The piston clearance adjusting apparatus of a press brake as claimed in claim 4, wherein a surface of the top member abutting against the piston ring has an oil groove, the oil groove and the piston ring forming the oil chamber therebetween; or the lubricating oil groove is arranged on the surface of the piston ring, which is abutted to the puller, and the lubricating oil cavity is formed between the lubricating oil groove and the piston ring.

6. The piston lash adjusting apparatus of a pressure machine brake according to claim 5, wherein the oil groove includes a first oil sub-groove along an axial direction of the piston ring and a plurality of second oil sub-grooves provided perpendicular to the first oil sub-groove, and the first oil sub-groove, the second oil sub-groove and the oil passage communicate with each other.

7. The piston clearance adjusting apparatus of a press brake as claimed in claim 1, wherein there are two mounting holes and two adjusting members, and a perpendicular bisector of a connecting line of the two mounting holes passes through a lowest point of the brake seat and a center of the brake seat.

8. The piston lash adjustment device of a pressure machine brake of claim 7, wherein the angle between the two mounting holes is between 40 ° and 90 °.

9. The piston gap adjusting apparatus of a press brake as claimed in claim 1, wherein two of the seal rings are connected by a connecting piece, the connecting piece has a connecting hole, an end surface of the piston ring has a threaded hole, and a screw connector is connected to the connecting hole and the threaded hole to connect the connecting piece to the piston ring.

Images