CN113561717A - Self-centering hinge structure of underground vehicle - Google Patents

Abstract

The invention provides a self-centering hinge structure of an underground vehicle, wherein a front hinged plate is horizontally arranged between two rear hinged plates which are arranged in parallel at intervals, a joint bearing is arranged in a hole formed in the front hinged plate, bearing glands are arranged at two ends of the joint bearing and are connected with the front hinged plate, a cylindrical section of a middle section of a taper pin shaft is arranged in an inner ring of the joint bearing, a centering expansion sleeve with a cylindrical outer wall and a conical inner wall is sleeved on a conical section positioned on the outer side of the cylindrical section, the centering expansion sleeve is arranged in a hole in the rear hinged plate, an expansion sleeve gland is pressed at the outer side end of the centering expansion sleeve, and the centering expansion sleeve is of an open structure. In the scheme, the centering expansion sleeve is used for restraining and fixing the taper pin shaft on the rear hinge plate in the axial direction and the radial direction, the joint bearing connected with the taper pin shaft is reliably restrained on the front hinge plate, and the rotary type hinged connection of the front hinge plate and the rear hinge plate is realized by relying on the simple and reliable structure.

Description

Self-centering hinge structure of underground vehicle

Technical Field

The present invention relates to a hinge structure, and more particularly to a rotary connection structure for two members or members.

Background

The front and rear frames of the articulated vehicle are mainly composed of an upper and a lower articulated components. The hinge assembly comprises a joint bearing, a pin shaft, a gland, a bush and the like. The underground vehicle has bad operation condition and larger self mass of the vehicle body, so the requirements on processing and manufacturing of each part in the hinge assembly are higher; in particular, the requirements on the coaxiality and the axial play clearance of the assembly of the upper hinge assembly and the lower hinge assembly are strict. Otherwise, the defects that the bearing is quickly abraded due to uneven stress, the hinged component moves and the frame is damaged are easily caused.

The applicant has filed a name of "hinge structure of underground vehicle" (document No. CN108016224A), and discloses a technical scheme that a bearing 40 is arranged in a hole formed on a hinge plate 20 on a front frame, a hinge shaft 10 is a stepped shaft with a middle part and a small diameter section is positioned in an inner ring of the bearing 40, the upper end and the lower end of the hinge shaft 10 are respectively arranged in hinge plates 30 on two rear frames, the upper and lower plate surfaces of the hinge plate 20 on the front frame are provided with an upper and a lower press covers 50, the shaft body of the hinge shaft 10 passes through the middle through holes of the upper and the lower press covers 50, the hole walls of the middle through holes of the upper and the lower press covers 50 are provided with grooves for accommodating sealing elements 60 arranged around the shaft body of the hinge shaft 10, one end of the articulated shaft 10 is provided with a boss 11 with non-circular outline and is arranged in a positioning hole 71 with the same outline arranged in the middle of the cover plate 70, the shaft body of the large-diameter section of the hinge shaft 10 is located between the cover plate 70 and the bearing 40.

The main problems of the scheme are that the structure is complex and the assembly efficiency is low.

Disclosure of Invention

The invention aims to provide a self-centering hinge structure of an underground vehicle, which is convenient to construct, high in assembly efficiency and reliable in axial limiting of a pin shaft.

In order to achieve the purpose, the invention provides the following technical scheme that a self-centering hinge structure of an underground vehicle is characterized in that a front hinge plate is horizontally arranged between two rear hinge plates which are arranged in parallel at intervals, and a joint bearing is arranged in a hole formed in the front hinge plate, and the self-centering hinge structure is characterized in that: the two ends of the joint bearing are provided with bearing glands, the bearing glands are connected with the front hinged plate, the cylindrical section of the middle section of the taper pin shaft is arranged in the inner ring of the joint bearing, the tapered column section positioned outside the cylindrical section is sleeved with a centering expansion sleeve of which the outer wall is cylindrical and the inner wall is in a tapered hole shape, the centering expansion sleeve is arranged in a hole on the rear hinged plate, the outer side end of the centering expansion sleeve is pressed with an expansion sleeve gland, and the centering expansion sleeve is in an open structure.

In the scheme, the centering expansion sleeve is used for restraining and fixing the taper pin shaft on the rear hinge plate in the axial direction and the radial direction, the joint bearing connected with the taper pin shaft is reliably restrained on the front hinge plate, and the rotary type hinged connection of the front hinge plate and the rear hinge plate is realized by relying on the simple and reliable structure.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 and 3 are respectively schematic structural diagrams of the taper pin shaft and the centering expansion sleeve.

Detailed Description

As shown in figure 1, the self-centering hinge structure of the underground vehicle is characterized in that a front hinge plate 20 is horizontally arranged between two rear hinge plates 30 which are arranged in parallel at intervals, a joint bearing 40 is arranged in a hole formed in the front hinge plate 20, bearing glands 50 are arranged at two ends of the joint bearing 40, the bearing glands 50 are connected with the front hinge plate 20, a cylindrical section 11 in the middle section of a taper pin shaft 10 is arranged in an inner ring of the joint bearing 40, a centering expansion sleeve 60 with a cylindrical outer wall and a conical inner wall is sleeved on a conical column section 12 positioned on the outer side of the cylindrical section 11, the centering expansion sleeve 60 is arranged in a hole formed in the rear hinge plates 30, an expansion sleeve gland 70 is arranged at the outer side end of the centering expansion sleeve 60 in a pressing mode, and the centering expansion sleeve 60 is of an open type structure.

With reference to fig. 1, under the constraint action of the centering expansion sleeve 60, the taper pin shaft 10 is reliably connected with the rear hinge plate 30, and the centering expansion sleeve 60 is assembled from two ends of the taper pin shaft 10, so that the assembly between the two parts is very simple and convenient, and the assembly efficiency is improved; the joint bearing 40 is constrained to the front hinge plate 20 by the bearing gland 50, so that the rotary hinged connection of the front hinge plate 20 and the rear hinge plate 30 is realized by the joint bearing 40 and the taper pin shaft 10.

Because of the double-ended conical cylindrical structure of the conical pin shaft 10, and the conicity of the upper and lower conical cylindrical sections 12 is the same, the centering expansion sleeve 60 is sleeved from the conical cylindrical sections 12 at both ends, and the screw 80 is connected through the inner hole of the conical pin shaft 10 running through the axial direction thereof, and the expansion sleeve gland 70 is pressed against the outer end faces of the two centering expansion sleeves 60 by the screw 80. The nut 82 is connected to one end of the screw 80, and the nut 82 and the locking washer are arranged between the rod head 81 of the screw 80 and the expansion sleeve gland 70 to form the anti-delivery fit. The arrangement of the expansion sleeve gland 70 also prevents dirt from entering from the end part of the taper pin shaft 10, ensures the clean working environment of the knuckle bearing 40 and prolongs the service life of the knuckle bearing.

In specific implementation, a centering hinge mechanism formed by the front hinge plate 20 and the rear hinge plate 30 is provided with an upper pair and a lower pair, the front hinge plate 20 and the rear hinge plate 30 are respectively and fixedly connected to the front frame 1 and the rear frame 2, and the shaft core of the taper pin shaft 10 is positioned in the plumb direction, so that the rotating fit state of the front frame 1 and the rear frame 2 is realized when the vehicle steers, and the sufficient traction force and the stability of the vehicle steering are also improved.

Although the scheme is arranged between the front frame and the rear frame, the centering hinge structure can also be suitable for other places with relative rotation fit.

The connecting hole of the front hinged plate 20 is provided with a steel sleeve 90, the joint bearing 40 is arranged in the steel sleeve 90, the bearing gland 50 is connected on the front hinged plate 20 through a hexagonal countersunk head screw 51, and the inner side plate surface of the bearing gland 50 is in press fit with the steel sleeve 90 and the outer plate surface of the front hinged plate 20. The radial constraint fit of the joint bearing 40 is realized through the steel sleeve 90, so that the workload of machining can be ensured, and the assembly precision can be ensured.

As shown in the drawings, the bearing gland 50 is located between the two rear hinge plates 30, that is, the bearing gland 50 is located between the two side plate surfaces of the two rear hinge plates 30 and the front hinge plate 20, the joint bearing 40 is axially limited and fixed by the bearing gland 50, the assembly is very convenient, and the machining precision of machining the bearing gland 50 can also be ensured, especially the bearing gland 50 also has the following task of setting sealing, the inner side hole edge of the through hole in the middle of the bearing gland 50 is a stepped hole, and the sealing ring 100 is arranged at the stepped hole. This facilitates machining of the stepped bore that receives the seal ring 100. In addition, the distance between the outer side plate surfaces of the bearing gland 50 also needs to meet the joint with the inner side plate surfaces of the two rear hinge plates 30, so that the machining precision of the bearing gland 50 needs to meet the assembly requirement.

The steel sleeve 90 is independently arranged, so that the oil passage 91 which is radially arranged and is arranged on the steel sleeve 90 is favorably communicated with the lubricating oil passage 41 on the knuckle bearing 40, and the lubricating effect is improved.

The assembly process of the present invention is briefly described as follows:

firstly, a front frame assembling process:

1. the lip-shaped sealing ring 100 is arranged in a groove of the bearing gland 50, namely a step hole on the inner side of the orifice edge in advance;

2. pressing the steel sleeve 90 into a connecting hole of a front hinge plate 20 of the front frame 1, and adjusting the distance between the upper end and the lower end of the steel sleeve 90 and the upper plate and the lower plate of the front hinge plate 20 according to the design requirement;

3. the knuckle bearing 40 is arranged in a sleeve cavity of the steel sleeve 90;

4. and then the bearing gland 50 and the front hinged plate 20 are fastened by a hexagonal countersunk head screw 51, and the outer ring of the joint bearing 40 is pressed, so that the assembly of the hinged plate of the front frame is completed.

II, assembling the hinge assembly:

1. the front hinge plate 20 assembled with the joint bearing 40 and the bearing gland 50 is inserted between the two rear hinge plates 30;

2. the taper pin shaft 10 penetrates into an inner ring hole of the joint bearing 40;

3. the centering expansion sleeve 60 is sleeved on the conical column sections 12 at the two ends of the conical pin shaft 10;

4. pressing in the expansion sleeve gland 70;

4. the fine-toothed screw 80 is inserted into the through holes of the expansion sleeve gland 70, the locking gasket and the self-centering expansion sleeve 60, and the nut 82 is screwed tightly to complete the assembly of the upper hinge assembly.

The device has the advantages that: foreign matters can be effectively prevented from entering the bearing, so that the abrasion of the joint bearing 40 is reduced, and the service life of the joint bearing is prolonged; the centering expansion sleeve 60 and the two ends of the taper pin shaft 10 have the same taper, and the centering expansion sleeve and the taper pin shaft automatically expand when pressed in and screwed down, so that the concentricity can be realized, the effective contact surface is increased, and meanwhile, the structural elements of the upper and lower hinged components can be interchanged, and the maintenance is convenient.

Claims (7)

1. The utility model provides a self-centering hinge structure of underground vehicle, preceding articulated slab (20) are arranged in parallel between two back articulated slabs (30) of interval arrangement horizontally, set up joint bearing (40), its characterized in that in the hole of seting up on preceding articulated slab (20): the joint bearing (40) is provided with bearing glands (50) at two ends, the bearing glands (50) are connected with the front hinged plate (20), the cylindrical section (11) in the middle section of the conical pin shaft (10) is arranged in the inner ring of the joint bearing (40), the conical column section (12) positioned outside the cylindrical section (11) is sleeved with a centering expansion sleeve (60) with a cylindrical outer wall and a conical inner wall, the centering expansion sleeve (60) is arranged in a hole in the rear hinged plate (30), the outer side end of the centering expansion sleeve (60) is pressed with an expansion sleeve gland (70), and the centering expansion sleeve (60) is of an open structure.

2. The underground vehicle self-centering articulated structure according to claim 1, characterized in that: the inner hole of the taper pin shaft (10) which runs through the axial direction of the taper pin shaft is connected with a screw rod (80) in a penetrating way, and the expansion sleeve gland (70) is propped against the outer end faces of the two centering expansion sleeves (60) by the screw rod (80).

3. The underground vehicle self-centering articulated structure according to claim 1, characterized in that: a steel sleeve (90) is arranged in the connecting hole of the front hinged plate (20), the joint bearing (40) is arranged in the steel sleeve (90), the bearing gland (50) is connected on the front hinged plate (20) by a flat head screw,

the inner side plate surface of the bearing gland (50) is in press fit with the steel sleeve (90) and the outer plate surface of the front hinge plate (20).

4. The underground vehicle self-centering articulated structure according to claim 1 or 3, characterized in that: the bearing gland (50) is positioned between the two rear hinged plates (30).

5. The underground vehicle self-centering articulation structure according to claim 3, characterized in that: the inner side hole edge of the through hole in the middle of the bearing gland (50) is a step hole, and a sealing ring (100) is arranged at the step hole.

6. The underground vehicle self-centering articulation structure according to claim 3, characterized in that: an oil passage (91) which is arranged in the radial direction is arranged on the steel sleeve (90) and is communicated with a lubricating oil passage (41) on the joint bearing (40).

7. The underground vehicle self-centering articulated structure according to claim 1, characterized in that: the conicity of the upper conical column section (12) and the lower conical column section (12) is the same.

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