CN202090249U - Seal structure of a hinged component - Google Patents

Abstract

The utility model discloses a seal structure of a hinged component. Two ends of a pin are respectively inserted into support apertures of two supports of a first component; the central section of the pin is sleeved with a sleeve gasket in loose fit, the sleeve gasket being provided with two jackets in loose fit; gap is formed between the adjacent inside end surfaces of the two jackets, and the outer end of each jacket is provided with radial bosses; the peripheries of the jacket bodies of the two jackets are both in tight fit with a second component; the inner surfaces of the radial bosses are respectively against with corresponding end surfaces on two ends of the inner holes of the second component. The pin is sleeved with two bearing discs in loose fit; the outsides of the bearing discs are respectively against with corresponding inner surfaces of the two supports of the first component, and the inner sides of the bearing discs are respectively against with corresponding end surfaces of the two ends of the sleeve gasket. The cylindrical surfaces of the radial bosses of the jackets are tightly sleeved with dish-shaped elastic sealing rings; at least one end of the pin possesses outside threads; the pin is fastened to the first component by nuts. The seal structure of hinged components has the advantages of reliable sealing, a compact structure and convenience in assembling and disassembling.

Description

A kind of hermetically-sealed construction of hinge member

Technical field

The utility model relates to the hinged hermetically-sealed construction of the tamping unit pick arm of a kind of hinge member structure, particularly railway tamping car.

Background technology

Tamping car is the main large-scale maintenance machinery equipment that the rail track operation is used, and is used widely in rail track repairing, existing line Speed Increased Reformed and ew line construction at present.Tamping unit is the groundwork device of tamping car, is used to make firm by ramming ballast aggregate at the bottom of the pillow of rail both sides, improves the compactness of pillow end track switch, and matches with playing a track lining device, eliminates being uneven of track, strengthens the stability of track.The pick arm is the strength member of tamping unit, bears vibration during operation and inserts the active force of making firm by ramming down, and the swinging mounting hole is arranged at the middle part of pick arm, and is hinged by the casing crossbeam of bearing pin and tamping unit.

The hinge point of pick arm is operating mode and abominable when the tamping car operation, should bear the huge following slotting power of tamping unit, bear again to insert the back tamping pickaxe under and when the clamping of sleeper direction, transmit the reaction force of returning, and by the vibration force of tamping unit vibrating shaft generation.Therefore very high to the lubricating requirement at this position, must have good lubricatedly, otherwise this position is with very fast generation wear out failure, this position all adopts thin oil lubricant with the assurance good lubricating effect usually.Owing to adopt thin oil lubricant, it is narrow and small to add this locus, position, operating mode is very abominable again during operation, and therefore conventional hermetically-sealed construction can't meet the demands, and must design the hermetically-sealed construction of rational pick arm hinge member to guarantee good sealing effectiveness at the specific (special) requirements at this position.

Summary of the invention

The purpose of this utility model is to provide a kind of hermetically-sealed construction that seals reliable and compact conformation, simple load and unload hinge member.

In order to achieve the above object, the technical solution adopted in the utility model is: a kind of hermetically-sealed construction of hinge member, comprise first parts, second parts and bearing pin, the two ends of described bearing pin are inserted into respectively in the support holes on two supports of first parts, be with to the middle part loose fit of bearing pin spacer, two chucks are housed to loose fit on the described spacer, leave the gap between the adjacent inner side end of two chucks, the cover body outer end of each chuck all has radially boss, the cover body periphery of described two chucks all with the endoporus tight fit of second parts, the medial surface of the radially boss of two chucks respectively with second parts on be positioned at the endoporus two ends corresponding end face offset, also be with to loose fit two bearing discs on the described bearing pin, the outside of two bearing discs offsets with two corresponding medial surfaces of support of first parts respectively, the inboard of two bearing discs offsets with the corresponding end face at spacer two ends respectively, all tightly be with dish-shaped elastic seal ring on the periphery of the radially boss of described two chucks, the outside of described dish-shaped elastic seal ring offsets with the inboard of corresponding bearing disc, the corresponding end face that is positioned at the endoporus two ends on the inboard and second parts offsets, described bearing pin has at least an end to have external screw thread, and stretch out outside the support holes of first parts, bearing pin is fixed on first parts by nut.

Described bearing disc is the concave disks that has cavity, and dish-shaped elastic seal ring sinks within the cavity of bearing disc.

Described dish-shaped elastic seal ring comprises rubber ring, disk spring and steel ring, steel ring is embedded within the rubber ring, disk spring is contained on the rubber ring and is supporting the lip and the back of rubber ring, the inner hole wall of rubber ring tightly is enclosed within on the periphery of boss of cover, the end face of second parts is close at the back of rubber ring, and lip is close to the inboard of bearing disc.

On the inner hole wall of described chuck and radially have the oil groove of perforation on the outer face of boss, the oil groove of this perforation is distributed with 4.

After adopting the structure of technique scheme, cooperation by bearing pin and nut, dish-shaped elastic seal ring on the extruding bearing disc, the elastic deformation of dish elastic seal ring is to the lubricant passage way positiver sealing that to a certain degree can make first parts and second parts, solved the sealing difficult problem of thin oil lubricant of the hinge member of tamping unit pick arm, and compact conformation, simple, mounting or dismounting are convenient.

Description of drawings

Fig. 1 is the structural representation of the hermetically-sealed construction of hinge member of the present utility model;

Fig. 2 is the structural representation that overlaps among Fig. 1;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the structural representation of bearing disc among Fig. 1;

Fig. 5 is the left view of Fig. 4;

Fig. 6 is the structural representation enlarged drawing of dish-shaped elastic seal ring among Fig. 1, i.e. the B-B sectional view of Fig. 7;

Fig. 7 is the left view of Fig. 6;

Fig. 8 is the A portion zoomed-in view of Fig. 6;

Fig. 9 is the C portion zoomed-in view of Fig. 7.

The specific embodiment

The embodiment that provides below in conjunction with accompanying drawing is described in further detail the utility model.

As Fig. 1,2,3,4,5,6, shown in 7, the hermetically-sealed construction of a kind of hinge member of the present utility model, comprise first parts 1, second parts 4 and bearing pin 7, the two ends of described bearing pin 7 are inserted into respectively among the support holes 1-1-1 on two support 1-1 of first parts 1, be with to the middle part loose fit of bearing pin 7 spacer 6, two chucks 5 are housed to loose fit on the described spacer 6, leave gap 9 between the adjacent inner side end of two chucks 5, the cover body 5-2 outer end of each chuck 5 all has radially boss 5-1, the cover body 5-2 periphery of described two chucks 5 all with the endoporus 4-1 tight fit of second parts 4, the medial surface of the radially boss 5-1 of two chucks 5 respectively with second parts 4 on be positioned at the endoporus two ends corresponding end face offset, also be with to loose fit two bearing discs 2 on the described bearing pin 7, the outside of two bearing discs 2 offsets with two corresponding medial surfaces of support 1-1 of first parts 1 respectively, the inboard of two bearing discs 2 offsets with the corresponding end face at spacer 6 two ends respectively, all tightly be with dish-shaped elastic seal ring 3 on the periphery of the radially boss 5-1 of described two chucks 5, the outside of described dish-shaped elastic seal ring 3 offsets with the inboard of corresponding bearing disc 2, the corresponding end face that is positioned at the endoporus two ends on the inboard and second parts 4 offsets, described bearing pin 7 has at least an end to have external screw thread 7-1, and stretch out outside the support holes 1-1-1 of first parts 1, bearing pin 7 is fixed on first parts 1 by nut 8.

Shown in Fig. 1,4,5, described bearing disc 2 is for having the concave disks of cavity 2-1, and dish-shaped elastic seal ring 3 sinks within the cavity 2-1 of bearing disc 2.

Shown in Fig. 1,6,7,8,9, described dish-shaped elastic seal ring 3 comprises rubber ring 3-1, disk spring 3-2 and steel ring 3-3, steel ring 3-3 is embedded within the rubber ring 3-1, disk spring 3-2 is contained in lip 3-1-1 and the back 3-1-2 that rubber ring 3-1 went up and supporting rubber ring 3-1, the inner hole wall of rubber ring 3-1 tightly is enclosed within on the periphery of 5 boss 5-1, the back 3-1-2 of rubber ring 3-1 is close to the end face of second parts 4, and lip 3-1-1 is close to the inboard of bearing disc 2.

Shown in Fig. 2,3, have the oil groove 5-3 of perforation on the inner hole wall 5-4 of described chuck 5 outer face last and radially boss 5-1, the oil groove 5-3 of this perforation is distributed with 4.

As shown in Figure 1, dish-shaped elastic seal ring 3 by fastening nut 8, compresses pick arm 1, bearing disc 2 near crossbeam 4 end faces, finally compresses dish-shaped elastic seal ring 3, reaches sealing by the crimp to sealing ring.

Shown in Fig. 1,8, behind fastening nut 8, all be close together between first parts 1, bearing disc 2, the spacer 6, to drive bearing pin 7, bearing disc 2 and spacer 6 when therefore first parts 1 rotate rotates simultaneously, relatively rotate between spacer 6 and the chuck 5, also relatively rotate between bearing disc 2 and the dish-shaped elastic seal ring 3 simultaneously.Preferably leave the gap of 0.15mm between the outside end face of chuck 5 and the bearing disc 2.Dish elastic seal ring 3 tightly is enclosed within on the periphery of radially boss 5-1 of chuck 5, and back 3-1-2 is close to the end face of second parts 4, after fastening nut 8, dish elastic seal ring 3 is extruded between the bearing disc 2 and second parts 4, disk spring 3-2 is stressed, force the lip 3-1-1 of rubber ring 3-1 to be close to the inner plane of bearing disc 2, reach sealing effectiveness.Have of the oilhole inflow of the lubrication oil of pressure from second parts, 4 middle parts, through the inner hole wall 5-4 of clearance space between chuck 5 and the spacer 6 and chuck 5 and 4 oil groove 5-3 on the outer face of boss 5-1 radially, finally flow to the outer face of chuck 5 and the space between the clearance space between the bearing disc 2 and dish-shaped elastic seal ring 3 and the bearing disc 2, lubrication oil just has been stored in this confined space like this, lubricating between the inwall of spacer 6 peripheries and chuck 5 when having guaranteed work reduces wearing and tearing and takes place.

Claims (4)

1. the hermetically-sealed construction of a hinge member comprises first parts (1), second parts (4) and bearing pin (7), it is characterized in that:

The two ends of a, described bearing pin (7) are inserted into respectively in the support holes (1-1-1) on two supports (1-1) of first parts (1), are with to the middle part loose fit of bearing pin (7) spacer (6),

B, described spacer (6) are equipped with two chucks (5) with going up loose fit, leave gap (9) between the adjacent inner side end of two chucks (5), and cover body (5-2) outer end of each chuck (5) all has radially boss (5-1),

Cover body (5-2) periphery of c, described two chucks (5) all with endoporus (4-1) tight fit of second parts (4), the medial surface of the radially boss (5-1) of two chucks (5) respectively with second parts (4) on be positioned at the endoporus two ends corresponding end face offset

D, described bearing pin (7) are gone up and also are with to loose fit two bearing discs (2), the outside of two bearing discs (2) offsets with the corresponding medial surface of two supports (1-1) of first parts (1) respectively, the inboard of two bearing discs (2) offsets with the corresponding end face at spacer (6) two ends respectively

All tightly be with dish-shaped elastic seal ring (3) on the periphery of the radially boss (5-1) of e, described two chucks (5),

The outside of f, described dish-shaped elastic seal ring (3) offsets with the inboard of corresponding bearing disc (2), and the corresponding end face that is positioned at the endoporus two ends on inboard and second parts (4) offsets,

G, described bearing pin (7) have at least an end to have external screw thread (7-1), and stretch out outside the support holes (1-1-1) of first parts (1), and bearing pin (7) is fixed on first parts (1) by nut (8).

2. the hermetically-sealed construction of hinge member according to claim 1 is characterized in that: described bearing disc (2) is for having the concave disks of cavity (2-1), and dish-shaped elastic seal ring (3) sinks within the cavity (2-1) of bearing disc (2).

3. the hermetically-sealed construction of hinge member according to claim 1, it is characterized in that: described dish-shaped elastic seal ring (3) comprises rubber ring (3-1), disk spring (3-2) and steel ring (3-3), steel ring (3-3) is embedded within the rubber ring (3-1), disk spring (3-2) is contained in lip (3-1-1) and back (3-1-2) that rubber ring (3-1) gone up and supported to rubber ring (3-1), the inner hole wall of rubber ring (3-1) tightly is enclosed within on the periphery of boss (5-1) of (5), the end face of second parts (4) is close at the back (3-1-2) of rubber ring (3-1), and lip (3-1-1) is close to the inboard of bearing disc (2).

4. the hermetically-sealed construction of hinge member according to claim 1, it is characterized in that: have the oil groove (5-3) of perforation on the inner hole wall (5-4) of described chuck (5) outer face last and radially boss (5-1), the oil groove of this perforation (5-3) is distributed with 4.

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