CN215334445U

CN215334445U - Tamping device lubricating and sealing structure and tamping device

Info

Publication number: CN215334445U
Application number: CN202121864477.6U
Authority: CN
Inventors: 向康; 王磊; 李春龙; 刘勇涛; 李居瑞
Original assignee: CRRC Qishuyan Institute Co Ltd; Changzhou CRRC Ruitai Equipment Technology Co Ltd
Current assignee: CRRC Qishuyan Institute Co Ltd; Changzhou CRRC Ruitai Equipment Technology Co Ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2021-12-28
Anticipated expiration: 2031-08-10

Abstract

The utility model relates to the technical field of railway construction, in particular to a lubricating and sealing structure of a tamping device and the tamping device. The tamping device lubricating and sealing structure comprises a box body, a pickaxe arm, a pin sleeve, a bushing, a pickaxe arm pin and a radial sealing element; the pickaxe arm pin penetrates through the pickaxe arm and the box body, so that the pickaxe arm and the box body are in hinged fit, the inner hole of the pin sleeve is in interference fit with the outer peripheral surface of the pickaxe arm pin, the bushing is sleeved on the outer peripheral surface of the pin sleeve and is in interference fit with the inner hole of the box body, the radial sealing element is embedded in an annular groove formed by the outer peripheral surface of the pin sleeve and the inner peripheral surface of the bushing, and the bushing, the pin sleeve and the radial sealing element form a first lubricating and sealing structure and form an annular oil cavity used for storing lubricating oil together in a surrounding mode. The tamping device lubricating and sealing structure provides a sealing structure with better lubricating property; the sealing structure is more reliable in lubrication sealing, easy to machine and manufacture and easy to assemble, and meanwhile, the machining and assembling difficulty is reduced.

Description

Tamping device lubricating and sealing structure and tamping device

Technical Field

The utility model relates to the technical field of railway construction, in particular to a lubricating and sealing structure of a tamping device and the tamping device.

Background

The sealing structure of the pick arm is a key structure on the tamping device, and mainly stores lubricating oil in the sealing structure, so that the hinge point of the pick arm and the box body is lubricated in the operation process of the tamping device, and the lubricating oil is prevented from leaking outwards.

However, the sealing structure of the pickaxe arm used by the tamping device is simple. In the in-service use process, the oil leak condition often appears in the pick arm box articulated position, if the activity duration is long, in time not discover the oil leak condition, appear lubricated not enough easily, lead to articulated position high temperature, arouse the trouble, influence tamping unit life.

SUMMERY OF THE UTILITY MODEL

Objects of the utility model include, for example, providing a tamper-lubricating seal arrangement and tamper apparatus that provides a dual seal that ameliorates the situation where a prior art tamper apparatus leaks oil.

Embodiments of the utility model may be implemented as follows:

in a first aspect, the present invention provides a tamping device lubrication seal structure, comprising:

the box body, the pickaxe arm, the pin sleeve, the bushing, the pickaxe arm pin and the radial sealing element;

the pick arm round pin is worn to establish the pick arm with the box, so that pick arm and box hinge fit, the hole interference fit of pin bushing in the outer peripheral face of pick arm round pin, the bush cover is located the outer peripheral face of pin bushing and with the hole interference fit of box, radial seal inlays to be located the outer peripheral face of pin bushing with in the ring channel that the inner peripheral face of bush encloses, the bush the pin bushing reaches radial seal forms first lubricated seal structure jointly and encloses into the annular oil pocket that is used for storing lubricating oil jointly.

The inventor finds that in the prior art, only an axial sealing structure is arranged between the pin sleeve and the bush, so that the radial sealing effect of the bush is poor, the oil leakage phenomenon is easy to occur, and the pin sleeve and the bush cannot be sufficiently lubricated or even are seized.

Aiming at the phenomenon, the tamping device lubricating and sealing structure is provided with the radial sealing element, the radial sealing element is arranged in an annular groove formed by the surrounding of the outer peripheral surface of the pin bush and the inner peripheral surface of the lining, and therefore the lining, the pin bush and the radial sealing element form a first lubricating and sealing structure together. The first lubricating and sealing structure can enable a good radial sealing effect to be achieved between the bushing and the pin sleeve, and therefore the technical problem that oil leakage is prone to occurring in the radial direction of the bushing in the prior art is solved.

And the bush, the pin bush and the radial sealing element also jointly enclose an annular oil cavity for storing lubricating oil, and the lubricating oil is stored in the annular oil cavity, because the first sliding sealing structure can form a sealing effect at the hinged part, the lubricating oil in the annular oil cavity cannot be leaked, and the pin bush and the bush are sufficiently lubricated, so that the technical problem that the pin bush and the bush are seized in the prior art is solved.

Furthermore, the first lubricating and sealing structure is matched with the annular oil cavity in a cooperative manner, so that the sealing function can be ensured; simultaneously for among the prior art sealed lubrication structure and articulated central point's distance far away and lead to lubricated effect not good, the distance of first lubricated seal structure and articulated central point of this scheme is more nearly, consequently lubricated effect is also better.

To sum up, the lubricating and sealing structure of the tamping device has the characteristics of simple structure and convenience in installation, and the technical problem that the sealing effect between the bushing and the pin bush is poor in the prior art, especially the sealing effect in the radial direction of the bushing is poor is remarkably solved by arranging the radial sealing element.

In an alternative embodiment, the radial seal has an annular cavity that opens toward the inner end surface of the bushing and is closed by both the inner end surface of the bushing and the outer circumferential surface of the pin bushing to form the annular oil chamber.

In an optional embodiment, a stepped boss is formed after the end part of the bushing extends radially and axially in sequence, the annular groove is surrounded by the stepped boss and the outer peripheral surface of the pin bush, and the opening of the annular groove faces the outer side of the box body;

the end part of the inner circumferential surface of the box body is recessed inwards to form a spigot, and the spigot is matched with the stepped boss.

In an alternative embodiment, the stepped boss includes a radial extension portion and an axial extension portion connected to each other, an end of the radial extension portion away from the axial extension portion is connected to an end portion of the bushing, and an end of the axial extension portion away from the radial extension portion exceeds an end surface of the box body.

In an alternative embodiment, the outer end face of the axial extension is coated with grease.

In optional embodiment, still include bearing plate and axial seal spare, be located between box and the pick arm installation department, the bearing plate cover is located the pick arm round pin just keeps away from the terminal surface of box is used for supporting the installation department of pick arm, axial seal spare install in axial extension's peripheral face, and one end with the terminal surface of box supports and holds, the other end with the bearing plate is close to the terminal surface of box supports and holds.

In an optional embodiment, the bearing disc comprises a disc body and an annular portion, the disc body is provided with an inner edge sleeved on the pick arm pin, the outer edge of the disc body extends axially to form the annular portion, the axial sealing element is at least partially located in an area surrounded by the annular portion, and one end, far away from the box body, of the axial sealing element abuts against an end face of the disc body.

In an optional implementation manner, the mounting portion of the pick arm is sleeved on the pick arm pin, and the mounting portion is used for supporting the bearing disc, so that the bearing disc simultaneously compresses the pin sleeve and the axial sealing element, and the bushing, the bearing disc, the axial sealing element, the radial sealing element and the pin sleeve jointly form a second lubricating and sealing structure.

The second lubricating and sealing structure can realize the axial sealing function. Further, the second lubricating and sealing structure may also use a different lubricant than the first lubricating and sealing structure, thereby ensuring the sealing effect of the hinge parts, for example, using grease lubrication.

In an optional implementation mode, the number of the pressure bearing discs, the axial sealing elements and the installation parts is two, two the pressure bearing discs are respectively sleeved on the pick arm pin, two the axial sealing elements are respectively sleeved on the outer peripheral surfaces of the bushings, two one ends of the axial sealing elements are respectively abutted to the box body, the other ends of the axial sealing elements are respectively abutted to the two pressure bearing discs, and two the installation parts are respectively sleeved on the pick arm pin and are used for respectively abutting against the two pressure bearing discs, so that the two pressure bearing discs respectively compress the two ends of the pin bush and respectively compress the two axial sealing elements, and the pin bush, the two bushings, the two pressure bearing discs, the two axial sealing elements and the two radial sealing elements jointly form 2 second lubricating and sealing structures.

In an alternative embodiment, the inner circumferential surface of the radial seal member abuts against the pin bush, and the outer circumferential surface of the radial seal member abuts against the inner circumferential surface of the stepped boss.

In an optional embodiment, the box body is provided with an oil inlet and an oil inlet channel which are sequentially communicated, the bushing is provided with an oil groove, the oil groove is located on the inner circumferential surface of the bushing hole, one end of the oil groove is communicated with the annular oil cavity, and the other end of the oil groove is communicated with one end, far away from the oil inlet, of the oil inlet channel.

In an alternative embodiment, the radial seal is a skeletal oil seal. The radial seal member has an inner peripheral surface and an outer peripheral surface, the inner peripheral surface of the radial seal member is bonded to the outer peripheral surface of the pin bush, and the outer peripheral surface of the radial seal member is bonded to the inner peripheral surface of the bush.

In an optional embodiment, the number of the bushings and the number of the radial sealing elements are two, the two bushings are respectively sleeved on the outer circumferential surface of the pin sleeve and are respectively in interference fit with two ends of the inner hole of the box body, the two bushings are arranged at intervals to form an oil passage for the lubricating oil to pass through, the two ends of the peripheral surface of the pin sleeve are respectively enclosed with the two bushings to form the annular grooves, the two radial sealing elements are respectively embedded in the two annular grooves, the pin sleeve, the two bushings and the two radial sealing elements jointly form 2 first lubricating and sealing structures and jointly enclose two annular oil chambers, one of the annular oil chambers is defined by the pin sleeve, one of the bushings, and one of the radial seals, the other annular oil chamber is defined by the pin sleeve, the other bushing and the other radial sealing element.

In an alternative embodiment, the bushing is a copper sleeve.

In a second aspect, the present invention provides a tamper arrangement comprising a tamper arrangement lubricating seal arrangement according to any one of the preceding embodiments.

The beneficial effects of the embodiment of the utility model include, for example:

the tamping device lubricating and sealing structure comprises a box body, a pickaxe arm, a pin bush, a bushing, a pickaxe arm pin and a radial sealing piece. The tamping device lubricating and sealing structure arranges the radial sealing element in an annular groove formed by surrounding the outer peripheral surface of the pin sleeve and the inner peripheral surface of the bushing, so that the bushing, the pin sleeve and the radial sealing element jointly form a first lubricating and sealing structure. The first lubricating and sealing structure can ensure that a good radial sealing effect is achieved between the bushing and the pin bush, so that the technical problem that oil leakage easily occurs in the radial direction of the bushing in the prior art is solved.

On the other hand, the bushing, the pin bush and the radial seal also jointly enclose an annular oil chamber for storing lubricating oil. The outstanding sealing effect of the first sliding and sealing structure can ensure that lubricating oil in the annular oil cavity cannot be leaked, so that the lubricating oil in the annular oil cavity cannot be leaked, the pin bush and the bush are sufficiently lubricated, and the technical problem that the pin bush and the bush are seized is solved. Therefore, the flexible rotation between the pick arm and the draft arm pin and the running stability of the tamping device are guaranteed.

Meanwhile, the first lubricating and sealing structure and the second lubricating and sealing structure are mutually nested, so that sealing and lubricating are more reliable, the machining precision of the bearing disc can be reduced, and the assembly is convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a lubricating and sealing structure of a tamping device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of a tamping unit lubricating and sealing structure according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a box body of a lubricating and sealing structure of the tamping device according to the embodiment of the present invention;

fig. 4 is a schematic structural view of a bushing of a lubricating and sealing structure of a tamping device according to an embodiment of the present invention.

Icon: 10-lubricating and sealing structure of tamping device; 11-a first lubricating sealing structure; 11 a-an annular oil chamber; 12-a second lubricating sealing structure; 100-a box body; 101-seam allowance; 102-an oil inlet; 103-an oil inlet channel; 200-a pickaxe arm; 210-a mounting portion; 300-pin sleeve; 400-a liner; 401-an annular groove; 402-an oil groove; 410-stepped bosses; 410 a-inner peripheral surface of the stepped boss; 411-a radial extension; 412-an axial extension; 412a — an outer end face of the axial extension; 500-a pickaxe arm pin; 600-a radial seal; 600 a-inner circumferential surface of radial seal; 600 b-the outer peripheral surface of the radial seal; 700-a pressure-bearing disc; 710-a disc body; 720-a ring section; 800-axial seal.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, it is only for convenience of describing the present invention and simplifying the description, but it is not necessary to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, it should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Specifically, the inventor finds that only axial seal exists between the pin bush and the bush in the prior art, so that the position tolerance of parts is high, the requirement on the assembly precision is strict, the perpendicularity of the bearing disc and the axial direction of the bush is difficult to guarantee, the sealing effect of the radial direction of the bush is poor, the oil leakage phenomenon easily occurs, and the phenomenon that the pin bush and the bush cannot be sufficiently lubricated or even are seized is caused.

In order to improve the technical problem, the following embodiments provide a tamping device lubrication sealing structure and a tamping device.

Fig. 1 is a schematic structural view of a lubricating and sealing structure 10 of a tamping apparatus according to the present embodiment. Fig. 2 is a partial schematic view of the tamper-lubricated sealing structure 10 of fig. 1. Fig. 3 is a structural schematic of the case 100 in fig. 1. Fig. 4 is a schematic view of the bushing 400 of fig. 1.

Referring to fig. 1 and 2, the present embodiment provides a tamping unit lubrication sealing structure 10, including:

the box 100, the pick arm 200, the pin sleeve 300, the bushing 400, the pick arm pin 500 and the radial seal 600;

the pick arm pin 500 penetrates through the pick arm 200 and the box body 100, so that the pick arm 200 is in hinged fit with the box body 100, an inner hole of the pin sleeve 300 is in interference fit with the outer peripheral surface of the pick arm pin 500, the bushing 400 is sleeved on the outer peripheral surface of the pin sleeve 300 and is in interference fit with the inner hole of the box body 100, the radial sealing element 600 is embedded in an annular groove 401 enclosed by the outer peripheral surface of the pin sleeve 300 and the inner peripheral surface of the bushing 400, and the bushing 400, the pin sleeve 300 and the radial sealing element 600 jointly form a first lubricating and sealing structure 11 and jointly enclose an annular oil cavity 11a for storing lubricating oil.

It should be noted that the radial seal 600 is such that the bushing 400, the pin sleeve 300, and the radial seal 600 together form the first lubrication seal 11. The radial and axial double sealing effect of the first lubricating and sealing structure 11 improves the technical problem that the sealing effect between the bushing 400 and the pin bush 300 is poor in the prior art, and particularly the sealing effect of the bushing 400 in the radial direction is poor.

Meanwhile, because of the double sealing effect of the first sliding sealing structure, the lubricating oil in the annular oil chamber 11a cannot leak and fully lubricate between the pin bush 300 and the bush 400, thereby improving the technical problem that seizure occurs in the pin bush 300 and the bush 400 in the prior art. Therefore, the flexible rotation between the pick arm 200 and the draft arm pin and the running stability of the tamping device are guaranteed.

It should be noted that, compared with the prior art, the distance between the seal lubrication structure and the hinge center is far, which results in poor lubrication effect;

the first lubricating and sealing structure is closer to the hinge center, and the first lubricating and sealing structure and the annular oil cavity are cooperatively matched to ensure the sealing function of the hinge, so that the lubricant is better sealed, and better lubricating performance is obtained. With continued reference to fig. 1-4, further details of the tamping tool lubricating and sealing structure 10 will be provided.

As can be seen from fig. 1, 2 and 3, in the present embodiment of the utility model, the radial seal 600 has an annular cavity, the opening of which is directed toward the inner end surface of the bushing 400 and is closed by both the inner end surface of the bushing 400 and the outer circumferential surface of the pin bush 300 to form an annular oil chamber 11 a.

Optionally, the radial seal 600 is a skeletal oil seal.

Referring to fig. 1, in the present embodiment of the utility model, the number of the bushing 400 and the number of the radial seal 600 are both two. The two bushings 400 are respectively sleeved on the outer circumferential surface of the pin sleeve 300 and are respectively in interference fit with two ends of the inner hole of the box body 100, and the two bushings 400 are arranged at intervals to form an oil passage for lubricating oil to pass through.

Two ends of the outer circumferential surface of the pin sleeve 300 respectively surround the two bushings 400 to form annular grooves 401, and the two radial seal members 600 are respectively embedded in the two annular grooves 401. The pin sleeve 300, the two bushings 400 and the two radial seals 600 together form 2 first lubricating and sealing structures 11 and together enclose two annular oil chambers 11a, wherein one annular oil chamber 11a is enclosed by the pin sleeve 300, one bushing 400 and one radial seal 600 together, and the other annular oil chamber 11a is enclosed by the pin sleeve 300, the other bushing 400 and the other radial seal 600 together.

Optionally, the bushing 400 is a copper sleeve. The copper sleeve has the characteristics of good wear-resisting effect and long service life.

Referring to fig. 1 to fig. 3, in this embodiment, in the present embodiment of the present invention, the box 100 is provided with the oil inlet 102 and the oil inlet channel 103 which are sequentially communicated, the bushing 400 is provided with an oil groove 402, the oil groove 402 is located on the inner circumferential surface of the hole of the bushing 400, and one end of the oil groove 402 is communicated with the annular oil cavity 11a, and the other end is communicated with one end of the oil inlet channel 103 far from the oil inlet 102.

The oil inlet 102, the oil inlet and the channel oil groove 402 are matched with each other, so that the lubricating effect between the inner circumferential surface of the bushing 400 and the outer circumferential surface of the pin bush 300 can be guaranteed.

Referring to fig. 1 to fig. 3, in this embodiment, the end of the bushing 400 sequentially extends radially and axially to form a stepped boss 410, the stepped boss 410 and the outer circumferential surface of the pin bush 300 form an annular groove 401, and an opening of the annular groove 401 faces the outer side of the box 100; the end of the inner circumferential surface of the case 100 is recessed to form a spigot 101, and the spigot 101 is engaged with the stepped boss 410.

It can be understood that the stepped bosses 410 can ensure the stable connection between the bushing 400 and the casing 100, and prevent the sealing effect at the bushing 400 from being affected by the misalignment between the bushing 400 and the casing 100 along the axial direction and the radial direction of the casing 100.

Further, in this embodiment, the inner circumferential surface 600a of the radial seal is attached to the pin sleeve 300 (when installed, the outer circumferential surface is in interference fit with the bushing, the inner circumferential surface is elastically attached to the pin sleeve, and during operation, the inner circumferential surface is rotationally sealed with respect to the pin sleeve, and the outer circumferential surface may also rotate to some extent with respect to the bushing), and the outer circumferential surface 600b of the radial seal is attached to the inner circumferential surface 410a of the stepped boss. This ensures the sealing effect of the radial seal 600 with the pin sleeve 300.

Referring to fig. 1 to 4, it can be seen that, in the present embodiment of the utility model, the stepped boss 410 includes a radial extension 411 and an axial extension 412 connected with each other, an end of the radial extension 411 away from the axial extension 412 is connected to an end of the bushing 400, and an end of the axial extension 412 away from the radial extension 411 exceeds an end surface of the box 100.

Specifically, the radial extension 411 can ensure the relative position between the bushing 400 and the box 100 along the axial direction of the box 100, and prevent the bushing 400 from moving along the axial direction of the box 100. The radial extension 411 can ensure the relative position between the bushing 400 and the box 100 along the axial direction of the box 100, and prevent the bushing 400 from moving along the radial direction of the box 100.

As can be further seen from the figures, in the present embodiment of the utility model, the tamping device lubricating and sealing structure 10 further includes a pressure-bearing disc 700 and an axial sealing element 800, which are located between the box body 100 and the mounting portion 210 of the pick arm 200, the pressure-bearing disc 700 is sleeved on the pick arm pin 500 and is away from the end face of the box body 100 for abutting against the pick arm 200, and the axial sealing element 800 is mounted on the outer circumferential surface of the axial extension portion 412, and one end of the axial sealing element abuts against the end face of the box body 100, and the other end abuts against the end face of the pressure-bearing disc 700 close to the box body 100.

A small gap is formed between the outer end 412a of the axial extension 412 and the end surface of the bearing disc 700 close to the housing, and grease is applied to prevent the bearing disc and the bushing from being worn when the structure is deformed, so that the lubrication function is mainly performed. The pressure-bearing disk only abuts against the end face of the pin bush in the middle thereof, and abuts against the axial sealing element at the edge thereof.

And the axial sealing element 800 and the radial sealing element 600 cooperate with each other, so that the bushing 400 can obtain good sealing effect in the axial direction and the radial direction, the sealing performance of the bushing 400 is further ensured, and the stability and the reliability of the operation of the tamping device are ensured.

Alternatively, in the present embodiment of the utility model, the outer end face 412a of the axially extending portion is coated with grease.

It should be noted here that, because the grease has viscosity, the outer end face 412a of the axial extension is provided with the grease, and a small gap exists between the outer end 412a of the axial extension 412 and the end face of the pressure receiving disc 700 close to the housing, and the grease is applied mainly for preventing the wear between the pressure receiving disc and the bushing when the structure is deformed, and mainly for lubrication.

Further, in this embodiment, the pressure bearing disc 700 includes a disc body 710 and an annular portion 720 connected to each other, an inner edge of the disc body 710 is sleeved on the pick arm pin 500, an outer edge of the disc body 710 extends axially to form the annular portion 720, the axial sealing element 800 is at least partially located in an area enclosed by the annular portion 720, and an end of the axial sealing element 800 away from the casing 100 abuts against an end face of the disc body 710.

As can be further seen from fig. 1, in the present embodiment of the utility model, the mounting portion 210 of the pick arm 200 is sleeved on the pick arm pin 500, and the mounting portion 210 is used for abutting against the pressure-bearing disc 700, so that the pressure-bearing disc 700 simultaneously compresses the pin sleeve 300 and the axial seal 800, and the bushing 400, the pressure-bearing disc 700, the axial seal 800, the radial seal 600 and the pin sleeve 300 jointly form the second lubricating and sealing structure 12.

And the second lubricating and sealing structure mainly realizes the axial sealing function. The second lubricating and sealing structure may also employ a different lubricant than the first lubricating and sealing structure to ensure the sealing effect of the hinge parts, for example grease lubrication.

And first lubrication sealing structure and second lubrication sealing structure are nested each other to make sealed, lubricated effect more reliable, still can reduce the machining precision of bearing plate, convenient equipment.

Optionally, the second lubrication seal arrangement 12 is greased.

In the embodiment of the present invention, the number of the pressure-bearing discs 700, the axial sealing elements 800 and the mounting portions 210 is two, the two pressure-bearing discs 700 are respectively sleeved on the pick arm pin 500, the two axial sealing elements 800 are respectively sleeved on the outer circumferential surfaces of the two bushings 400, one ends of the two axial sealing elements 800 respectively abut against the box body 100, the other ends of the two axial sealing elements 800 respectively abut against the two pressure-bearing discs 700, and the two mounting portions 210 are respectively sleeved on the pick arm pin 500 and are used for respectively abutting against the two pressure-bearing discs 700, so that the two pressure-bearing discs 700 respectively press two ends of the pin sleeve 300 and respectively press the two axial sealing elements 800, and the pin sleeve 300, the two bushings 400, the two pressure-bearing discs 700, the two axial sealing elements 800 and the two radial sealing elements 600 together form 2 second lubricating and sealing structures 12.

In use, the tamping tool lubricating and sealing structure 10 of the present embodiment provides both a radial seal 600 and an axial seal 800, as compared to the prior art, which provides only axial sealing. The radial seal 600 and other components form a first lubrication seal structure 11, the axial seal 800 and other components form a second lubrication seal structure 12. The radial sealing part 600 is arranged close to the inner side of the bushing 400 to mainly realize radial sealing, and the first lubricating and sealing structure 11 adopts an oil lubricating mode; the axial seal is mainly achieved by the axial seal member 800 located in the outer direction of the bushing 400, and the second lubrication sealing structure 12 is grease-lubricated.

Compared with the prior art in which oil lubrication is adopted for axial sealing, the axial sealing element 800 is lubricated by grease, so that the requirements on the machining precision and the position tolerance of the pressure bearing disc 700 are not high, the machining difficulty of the pressure bearing disc 700 can be reduced, the assembly difficulty can be reduced, and the problem of oil leakage caused by poor matching can be solved.

Furthermore, the second lubricating and sealing structure 12 positioned on the outer side plays a role in protecting the first lubricating and sealing structure 11 positioned on the inner side, so that the oil leakage probability of the sealing structure of the pick arm 200 is reduced, the operation efficiency of the tamping device is improved, and the service life of the tamping device is prolonged. To sum up, first lubrication sealing structure 11 and the cooperation of second lubrication sealing structure 12, tamping unit lubrication sealing structure 10 adopts the mode that oil lubrication, fat lubrication combine, and the probability of pick arm 200 seal structure oil leak is reduced to the mode of double seal, improves life, has ensured the stable, high-efficient operation of tamping unit.

In a second aspect, the present invention provides a tamper apparatus comprising a tamper apparatus lubricating seal arrangement 10 according to any one of the preceding embodiments. The tamping device has better sealing effect, so that the phenomenon that oil leakage is easy to occur due to poor sealing effect at the hinged part of the pick arm and the box body can be improved, the pin sleeve 300 and the bush 400 can be fully lubricated, and the phenomenon that the pin sleeve 300 and the bush 400 are seized up is avoided.

In summary, the embodiment of the present invention provides a tamping device lubricating and sealing structure 10 and a tamping device, which have at least the following advantages:

the lubricating sealing structure has better lubricating performance;

the lubricating sealing structure of the scheme has more reliable lubricating sealing, is easy to process and manufacture and assemble, and reduces the processing and assembling difficulty;

the scheme adopts a multi-sealing mode and combines oil lubrication and grease lubrication;

this scheme adopts the modularized design, can be applied to the tamping unit of different models.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A tamping unit lubricating and sealing structure is characterized by comprising:

the pick arm mechanism comprises a box body (100), a pick arm (200), a pin sleeve (300), a bushing (400), a pick arm pin (500) and a radial sealing element (600);

pick arm round pin (500) wear to establish pick arm (200) with box (100), so that pick arm (200) and box (100) articulated cooperation, the hole interference fit of round pin cover (300) in the outer peripheral face of pick arm round pin (500), bush (400) cover is located the outer peripheral face of round pin cover (300) and with the hole interference fit of box (100), radial seal (600) inlay and are located the outer peripheral face of round pin cover (300) with in ring channel (401) that the inner peripheral face of bush (400) encloses, bush (400) round pin cover (300) and radial seal (600) form first lubrication sealing structure (11) jointly and enclose into annular oil pocket (11a) that are used for storing lubricating oil jointly.

2. The tamper lubricating and sealing structure according to claim 1, wherein the radial seal (600) has an annular cavity opening toward the inner end face of the bushing (400) and being closed by both the inner end face of the bushing (400) and the outer peripheral surface of the pin boss (300) to form the annular oil chamber (11 a).

3. The tamper-lubricating seal structure of claim 1, wherein:

the end part of the bushing (400) sequentially extends in the radial direction and the axial direction to form a stepped boss (410), the annular groove (401) is surrounded by the stepped boss (410) and the outer peripheral surface of the pin bush (300), and the opening of the annular groove (401) faces the outer side of the box body (100);

the end part of the inner circumferential surface of the box body (100) is recessed inwards to form a spigot (101), and the spigot (101) is matched with the stepped boss (410).

4. The tamper-lubricating seal structure of claim 3, wherein:

the stepped boss (410) comprises a radial extension portion (411) and an axial extension portion (412) which are connected, one end, away from the axial extension portion (412), of the radial extension portion (411) is connected with the end portion of the bushing (400), and one end, away from the radial extension portion (411), of the axial extension portion (412) exceeds the end face of the box body (100).

5. The tamper-lubricating seal structure of claim 4, wherein:

an outer end face (412a) of the axially extending portion is coated with grease.

6. The tamper-lubricating seal structure of claim 4, wherein:

still include pressure-bearing disc (700) and axial seal spare (800), be located between box (100) and pick arm (200) installation department (210), pressure-bearing disc (700) cover is located pick arm round pin (500) just keep away from the terminal surface of box (100) is used for supporting hold installation department (210) of pick arm (200), axial seal spare (800) install in the outer peripheral face of axial extension portion (412), and one end with the terminal surface of box (100) supports and holds, the other end with pressure-bearing disc (700) are close to the terminal surface of box (100) supports and holds.

7. The tamper-lubricating seal structure of claim 6, wherein:

the bearing disc (700) comprises a disc body (710) and an annular part (720) which are connected, the pick arm pin (500) is sleeved on the inner edge of the disc body (710), the annular part (720) is formed by axially extending the outer edge of the disc body (710), the axial sealing element (800) is at least partially positioned in an area enclosed by the annular part (720), and one end, far away from the box body (100), of the axial sealing element (800) abuts against the end face of the disc body (710).

8. The tamper-lubricating seal structure of claim 6, wherein:

installation department (210) cover of pick arm (200) is located pick arm round pin (500), installation department (210) are used for supporting pressure-bearing dish (700), so that pressure-bearing dish (700) compress tightly simultaneously cotter (300) with axial seal (800), thereby make bush (400), pressure-bearing dish (700), axial seal (800) radial seal (600) reach cotter (300) forms second lubricated seal structure (12) jointly.

9. The tamper-lubricating seal structure of claim 8, wherein: the bearing plate (700), the axial seal piece (800) reach the quantity of installation department (210) is two, two bearing plate (700) overlap respectively and locate pick arm round pin (500), two axial seal piece (800) overlap respectively and locate two the outer peripheral face of bush (400), two the one end of axial seal piece (800) respectively with box (100) support and hold, the other end is respectively two bearing plate (700) support and hold, two installation department (210) overlap respectively and locate pick arm round pin (500) are used for supporting respectively two bearing plate (700) to make two bearing plates (700) compress tightly respectively the both ends of round pin cover (300) and compress tightly two axial seal piece (800) respectively, thereby make round pin cover (300), two bush (400), two bearing plate (700), two axial seal piece (800) and two radial seal piece (600) form two jointly the bearing plate (700) two A second lubrication seal arrangement (12).

10. The tamper-lubricating seal structure of claim 3, wherein:

an inner circumferential surface (600a) of the radial seal is in contact with the pin bush (300), and an outer circumferential surface (600b) of the radial seal is in contact with an inner circumferential surface (410a) of the stepped boss.

11. The tamper-lubricating seal structure of claim 3, wherein:

the oil inlet (102) and the oil inlet channel (103) which are communicated in sequence are arranged on the box body (100), the bushing (400) is provided with an oil groove (402), the oil groove (402) is located on the inner circumferential surface of the hole of the bushing (400), one end of the oil groove is communicated with the annular oil cavity (11a), and the other end of the oil groove is communicated with one end, far away from the oil inlet (102), of the oil inlet channel (103).

12. The tamper-lubricating seal structure of claim 1, wherein: the radial seal (600) is a framework oil seal, the radial seal (600) is provided with an inner circumferential surface and an outer circumferential surface, the inner circumferential surface of the radial seal is attached to the outer circumferential surface of the pin sleeve (300), and the outer circumferential surface of the radial seal is attached to the inner circumferential surface of the bushing (400).

13. The tamper-lubricating seal structure of claim 1, wherein: the number of the bushings (400) and the number of the radial sealing elements (600) are two, the two bushings (400) are respectively sleeved on the outer peripheral surface of the pin sleeve (300) and are respectively in interference fit with two ends of an inner hole of the box body (100), the two bushings (400) are arranged at intervals to form an oil passage for the lubricating oil to pass through, two ends of the outer peripheral surface of the pin sleeve (300) and the two bushings (400) respectively enclose the annular groove (401), the two radial sealing elements (600) are respectively embedded in the two annular grooves (401), the pin sleeve (300), the two bushings (400) and the two radial sealing elements (600) jointly form two first lubricating and sealing structures (11) and jointly enclose two annular oil cavities (11a), one of the annular oil cavities (11a) is jointly enclosed by the pin sleeve (300), one of the bushings (400) and one of the radial sealing elements (600), the other annular oil chamber (11a) is enclosed by the pin sleeve (300), the other bushing (400) and the other radial seal (600).

14. The tamper-lubricating seal structure of claim 1, wherein:

the bushing (400) is a copper sleeve.

15. A tamping device, characterized by:

a tamper assembly including a tamper assembly lubricating seal arrangement according to any one of claims 1 to 14.