CN216720879U - Pre-tightening slewing device - Google Patents

Abstract

The utility model provides a pre-tightening slewing device, which comprises: the device comprises a rotary part (10), a pre-tightening spring cylinder assembly, a movable connector (50), a telescopic oil cylinder (30) and a fixed seat (40); the rotary part (10) comprises a rotary wheel (11) and a rotary wheel mounting rack (12), and the rotary wheel mounting rack (12) is connected with the pre-tightening spring cylinder assembly; the movable connector (50) is provided with a first hinge part (51) and a second hinge part (52), a first hinge shaft (511) of the first hinge part (51) is perpendicular to a second hinge shaft (521) of the second hinge part (52), and the first hinge part (51) is hinged with the pre-tightening spring cylinder assembly through the first hinge shaft (511); the second hinge part (52) is hinged with the telescopic oil cylinder (30) through a second hinge shaft (521); one end of the telescopic oil cylinder (30) is fixed on the fixed seat (40). Through setting up the swing joint head, guaranteed that the gyration portion all has deflection of certain angle in level and vertical direction, adapted working face.

Description

Pre-tightening rotary device

Technical Field

The utility model relates to the technical field of cable dragging, in particular to a pre-tightening slewing device.

Background

At present, a cable is dragged to move by a cable dragging frame of a coal mining machine on a coal mine fully mechanized mining face, the cable dragging mode is influenced by a coal mining process, a plurality of times of bending and multi-layer stacking of cable clamping plates can occur at certain positions of the working face, and once the bending radius is smaller than the bending radius of the cable due to the influence of the structural size, the cable is easily broken. Especially on a thin coal seam working face, because the height of a cable clamp plate placing space of a cable trough of a conveyor is limited by the matched size, the size often only meets the requirement that cables are stacked into three layers or bent into two bends, and more than three layers of cables break through extrusion, so that normal coal mining is influenced.

In addition, the pretightening device in the prior art has the problems of complex structure, incapability of adjusting the pretightening force, and trouble damage and maintenance.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an embodiment of the present invention provides a pre-tensioning swiveling device, including: the device comprises a rotary part (10), a pre-tightening spring cylinder assembly, a movable connector (50), a telescopic oil cylinder (30) and a fixed seat (40);

the rotary part comprises a rotary wheel mounting frame and a rotary wheel arranged on the rotary wheel mounting frame, and the rotary wheel mounting frame is connected with the pre-tightening spring cylinder assembly;

the movable connector is provided with a first hinge part and a second hinge part, a first hinge shaft of the first hinge part is perpendicular to a second hinge shaft of the second hinge part, and the first hinge part is hinged with the pre-tightening spring cylinder assembly through the first hinge shaft;

the second hinged part is hinged with the telescopic oil cylinder through a second hinged shaft, and one end of the telescopic oil cylinder is fixed on the fixed seat.

The utility model has the following beneficial effects: the movable connector ensures that the rotary part deflects at a certain angle in the horizontal and vertical directions to adapt to a working surface; the pretightening force can both be adjusted to pretension spring cylinder subassembly and flexible hydro-cylinder, has realized the dual regulation of pretightning force, and the suitability is stronger.

In some embodiments, the first hinge portion is a block structure having a first shaft hole, and the first hinge shaft is inserted into the first shaft hole;

the second hinge part is of a block structure with a notch and a second shaft hole, the second shaft hole penetrates through the second hinge part and passes through the notch, the second hinge shaft is inserted into the second shaft hole, and the end part of the telescopic oil cylinder is arranged in the notch and is hinged to the second hinge part through the second hinge shaft.

In some embodiments, the end of the first hinge shaft has a semicircular first end cap, one side of which is provided with a first cover plate, and a portion of the end of the first hinge shaft is stopped by the first cover plate;

and/or the like and/or,

the end of the second hinge shaft is provided with a semicircular second end cap, a second cover plate is arranged on one side of the second end cap, and a part of the end of the second hinge shaft is stopped by the second cover plate.

In some embodiments, the preloaded spring cylinder assembly includes two connecting plates and two preloaded spring cylinders;

the cylinder barrels of the two pre-tightening spring cylinders are fixedly connected with the two connecting plates,

the end parts of the two pre-tightening spring cylinders are respectively provided with a first connecting part, the end parts of the two connecting plates are provided with a second connecting part, and the second connecting parts are arranged opposite to the first connecting parts;

the first connecting portion is connected with the turning wheel mounting frame, and the second connecting portion is hinged to the first hinging portion.

In some embodiments, two of the connecting plates are arranged in parallel, and the first hinge portion is located between the two second connecting portions.

In some embodiments, the pretensioned spring cylinder comprises:

the cylinder barrel is provided with a hollow cavity, the hollow cavity penetrates through the cylinder barrel along the axial direction of the cylinder barrel, and one end of the hollow cavity is provided with a stopping part;

the pull rod is inserted into the hollow cavity, one end of the pull rod is provided with external threads, the other end of the pull rod is connected with a pressing block, and the pressing block is arranged in the hollow cavity and can slide in the hollow cavity along the axial direction of the cylinder barrel;

the threaded connector is provided with a first connecting part and an internal threaded hole which can be matched with the external thread;

the spring is sleeved on the pull rod and is positioned in the hollow cavity; the threaded connector is connected with the external thread of the pull rod through the internal thread hole, so that the spring is compressed between the stopping part and the pressing block.

In some embodiments, the depth of the pull rod inserted into the internal threaded hole is adjustable to adjust the pre-tightening force of the spring.

In some embodiments, the pressing block is connected with the end part of the pull rod through a thread structure, and the pressing block and the hollow cavity form a guiding fit.

In some embodiments, the pressing block and/or the stopper is provided with a dust ring;

the stopping part is fixedly connected with the cylinder barrel through a thread structure, or the stopping part and the cylinder barrel are integrally formed.

In some embodiments, the first connecting portion and the internal threaded hole are oppositely arranged, and the first connecting portion is provided with a hinge hole.

Drawings

FIG. 1 is a schematic cross-sectional view of a preloaded spring cylinder assembly according to an embodiment of the present invention;

FIG. 2 is a perspective view of a pre-tensioned spring cylinder assembly according to an embodiment of the utility model;

FIG. 3 is a perspective view of a threaded joint according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a pretensioned gyroscope of an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a turning part in an embodiment of the present invention;

FIG. 6 is a perspective exploded view of the movable joint according to the embodiment of the present invention;

FIG. 7 is a partially enlarged schematic view of a pretensioned gyroscope of an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

Referring to fig. 1 and 2, the present embodiment provides a pretensioned spring cylinder 20 including: cylinder 21, pull rod 22, threaded connector 23 and spring 24. The cylinder 21 has a hollow cavity 211, the hollow cavity 211 penetrates through the cylinder 21 along the axial direction of the cylinder 21, and one end of the hollow cavity 211 has a stopping portion 212; the pull rod 22 is inserted into the hollow cavity 211, one end of the pull rod 22 is provided with an external thread 222, the other end of the pull rod is connected with the pressing block 221, and the pressing block 221 is arranged in the hollow cavity 211 and can slide in the hollow cavity 211 along the axial direction of the cylinder 21; the threaded connector 23 has a first connection portion 232 and an internal threaded hole 231 capable of mating with the external thread 222; the spring 24 is sleeved on the pull rod 22 and is positioned in the hollow cavity 211; the threaded connector 23 is connected to the external thread 222 of the pull rod 22 through the internal threaded hole 231, so that the spring 24 is compressed between the stopper 212 and the pressing piece 221.

The threaded connector 23 can move relative to the cylinder 21, when the threaded connector 23 is far away from the cylinder 21, the threaded connector 23 drives the pressing block 221 to move through the pull rod 22, the pressing block 221 extrudes the spring 24, and the spring 24 is further compressed due to the stop of the stopping portion 212. The pre-tightening spring cylinder 20 with the structure has the advantages of simple structure, convenience in maintenance and long service life.

In some embodiments, the depth of insertion of the pull rod 22 into the internally threaded bore 231 is adjustable to adjust the preload of the spring 24. According to the above structure, the depth of the pull rod 22 inserted into the internal threaded hole 231 is a month, the larger the compression amount of the spring 24 is, and the larger the pre-tightening force is, and the pre-tightening force can be adjusted by those skilled in the art according to the requirements when using the pre-tightening spring cylinder. Since the pull rod 22 and the threaded connector 23 are connected by threads, stepless adjustment of the pretension can be achieved.

In some embodiments, the pressing piece 221 is connected with the end of the pull rod 22 through a screw structure, and the pressing piece 221 forms a guiding fit with the hollow cavity 211. That is, the pressing piece 221 guides the movement of the pull rod 22, and ensures the coaxiality of the pull rod 22 and the cylinder 21.

In some embodiments, the pressing piece 221 and/or the stopping portion 212 are provided with a dust ring to prevent dust from entering into the hollow cavity 211. The stopping portion 212 may be fixedly connected to the cylinder 21 by a screw structure, and the stopping portion 212 may also be integrally formed with the cylinder 21.

Referring to fig. 3, in some embodiments, the first connection portion 232 is disposed opposite to the internal threaded hole 231, and the first connection portion 232 has a hinge hole 2321. The pivot hole 2321 is used to connect with other components to apply tension to the threaded connector 23.

The present embodiment further provides a pre-tightening spring cylinder assembly, referring to fig. 1 and 2, the pre-tightening spring cylinder assembly comprises a connecting plate 25 and two pre-tightening spring cylinders 20 in the above embodiments; the cylinder barrels 21 of the two pre-tightening spring cylinders 20 are fixed on the connecting plate 25, the end of the connecting plate 25 is provided with a second connecting part 251, and the second connecting part 251 is opposite to the first connecting part 232. The second connection portion 251 is used to connect another member, thereby applying a tensile force to the cylinder tube 21. The pre-tightening spring cylinder assembly of the embodiment is convenient to install, and the two pre-tightening spring cylinders 20 can be simultaneously utilized, so that the pre-tightening force is increased, and the selectable range of the pre-tightening force is expanded.

In some embodiments, both pre-tensioned spring cylinders 20 and the connecting plate 25 are arranged parallel to each other. The connecting plate 25 is in the form of a long plate, and the parallel arrangement here means that the longitudinal direction of the two pretensioned spring cylinders 20 is in parallel relation to the longitudinal direction of the connecting plate 25. In particular, the two cylinders 21 may be welded on the connection plate 25.

The present embodiment further provides a pre-tightening swiveling device, referring to fig. 4, including: the rotary part 10, the pre-tightening spring cylinder assembly in any of the above embodiments, the telescopic cylinder 30 and the fixed seat 40. Referring to fig. 5, the swivel part 10 includes a swivel wheel 11 provided on the swivel wheel mounting 12, and the swivel wheel 11 is mounted on the swivel wheel mounting 12 and can rotate around its axis relative to the swivel wheel mounting 12.

The caster wheel mounting bracket 12 is connected to the first connecting portion 232; the telescopic cylinder 30 is connected with the second connecting part 251; one end of the telescopic oil cylinder 30 is fixed on the fixed seat 40. The turning part 10 is used for connecting with a chain, a timing belt, or the like, and in the case of the chain, one end of the closed chain is fitted over the turning wheel 11 and is driven by a driving member to rotate. The pretightening force is applied through the pretightening spring cylinder assembly, the tensity of the chain is guaranteed, the telescopic oil cylinder 30 can further realize the control of the pretightening force, and the telescopic oil cylinder 30 extends to reduce the pretightening force and shortens to increase the pretightening force. The fixing base 40 provides a mounting base for the telescopic oil cylinder 30.

The pre-tightening slewing device can be used for a cable dragging device of a coal mining machine. Wherein, pretension spring cylinder subassembly and flexible hydro-cylinder 30 all have the effect of adjusting the pretension, and both inter combination can realize dragging the stability of cable conductor, reduce the damage to the cable.

The pre-tightening slewing device of the embodiment can not be influenced by a coal mining process, and the cable clamp plate of the coal mining machine can be bent only one time and stacked two layers no matter the cable clamp plate is positioned at any part of a working surface, so that the cable clamp plate of the coal mining machine is always in a flat state in the process of repeatedly walking of the coal mining machine, and the cable clamp plate can be well synchronized with the traction process of the coal mining machine.

In some embodiments, the telescopic cylinder 30 and any one of the preloaded spring cylinders 20 are parallel to each other. The pre-tightening spring cylinder assembly is connected with the telescopic cylinder 30 through a movable connector 50, so that flexible connection is guaranteed.

Referring to fig. 4, the present embodiment also provides a pre-tightening swiveling apparatus including: the device comprises a rotary part 10, a pre-tightening spring cylinder assembly, a movable connector 50, a telescopic oil cylinder 30 and a fixed seat 40. Referring to fig. 5, the turning part 10 includes a turning wheel 11 and a turning wheel mounting bracket 12, the turning wheel 11 is mounted on the turning wheel mounting bracket 12 and can rotate around its axis relative to the turning wheel mounting bracket 12; the turning wheel mounting frame 12 is connected with a pre-tightening spring cylinder assembly; referring to fig. 6 and 7, the movable connector 50 has a first hinge portion 51 and a second hinge portion 52, a first hinge axis 511 of the first hinge portion 51 is perpendicular to a second hinge axis 521 of the second hinge portion 52, and the first hinge portion 51 is hinged to the preloaded spring cylinder assembly through the first hinge axis 511; the second hinge part 52 is hinged with the telescopic cylinder 30 through a second hinge shaft 521; one end of the telescopic oil cylinder 30 is fixed on the fixed seat 40. The arrangement of the movable joint 50 can ensure that the rotary part 10 deflects at a certain angle in both horizontal and vertical directions to adapt to the working surface.

In some embodiments, the first hinge portion 51 is a block structure having a first shaft hole, and the first hinge shaft 511 is inserted into the first shaft hole; the second hinge portion 52 is a block-shaped structure having a notch 522 and a second shaft hole, the second shaft hole penetrates through the second hinge portion 52 and passes through the notch 522, the second hinge shaft 521 is inserted into the second shaft hole, and the end portion of the telescopic cylinder 30 is disposed in the notch 522 and is hinged to the second hinge portion 52 through the second hinge shaft 521.

In some embodiments, referring to fig. 6 and 7, the end portion of the first hinge shaft 511 has a semicircular first end cap 5110, a first cover plate 5111 is disposed at one side of the first end cap 5110, a portion of the end portion of the first hinge shaft 511 is stopped by the first cover plate 5111 so as to prevent the first hinge shaft 511 from slipping out of the first shaft hole, the first end cap 5110 and the first cover plate 5111 are disposed at the same end of the first hinge shaft 511, and the first cover plate 5111 is coupled to the first hinge 51, particularly, by screws.

Likewise, the end of the second hinge shaft 521 has a semicircular second end cap 5210, a second cover plate 5211 is provided at one side of the second end cap 5210, and a portion of the end of the second hinge shaft 521 is stopped by the second cover plate 5211. The second cover plate 5211 and the second end cap 5210 are positioned at the same end of the second hinge shaft 521.

In some embodiments, the pre-tensioning spring cylinder assembly comprises two connecting plates 25 and two pre-tensioning spring cylinders 20; the cylinder barrels 21 of the two pre-tightening spring cylinders 20 are fixedly connected with the two connecting plates 25, the end parts of the two pre-tightening spring cylinders 20 are provided with first connecting parts 232, the end parts of the two connecting plates 25 are provided with second connecting parts 251, and the second connecting parts 251 are opposite to the first connecting parts 232; the first connecting portion 232 is connected to the caster mounting bracket 12, and the second connecting portion 251 is hinged to the first hinge portion 51.

Specifically, two connecting plates 25 are arranged in parallel, and the first hinge portion 51 is located between the two second connecting portions 251.

For the specific structure of the pre-tensioning spring cylinder 20, reference may be made to the description of the above embodiments, which are not repeated herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A preloaded slewing device, comprising: the device comprises a rotary part (10), a pre-tightening spring cylinder assembly, a movable connector (50), a telescopic oil cylinder (30) and a fixed seat (40);

the rotary part (10) comprises a rotary wheel mounting frame (12) and a rotary wheel (11) arranged on the rotary wheel mounting frame (12), and the rotary wheel mounting frame (12) is connected with the pre-tightening spring cylinder assembly;

the movable connecting head (50) is provided with a first hinge part (51) and a second hinge part (52), a first hinge shaft (511) of the first hinge part (51) is perpendicular to a second hinge shaft (521) of the second hinge part (52), and the first hinge part (51) is hinged with the pre-tightening spring cylinder assembly through the first hinge shaft (511);

the second hinge part (52) is hinged with the telescopic oil cylinder (30) through a second hinge shaft (521), and one end of the telescopic oil cylinder (30) is fixed on the fixed seat (40).

2. The pre-tensioning slewing device according to claim 1, characterized in that the first hinge (51) is a block-shaped structure with a first shaft hole, and the first hinge shaft (511) is inserted into the first shaft hole;

the second hinge portion (52) is a block-shaped structure having a notch (522) and a second shaft hole, the second shaft hole penetrates through the second hinge portion (52) and passes through the notch (522), the second hinge shaft (521) is inserted into the second shaft hole, and an end portion of the telescopic cylinder (30) is disposed in the notch (522) and is hinged to the second hinge portion (52) through the second hinge shaft (521).

3. The pretensioned swiveling device according to claim 1, wherein an end of the first hinge shaft (511) has a semicircular first end cap (5110), a first cover plate (5111) is provided at one side of the first end cap (5110), and a portion of the end of the first hinge shaft (511) is stopped by the first cover plate (5111);

and/or the like, and/or,

the end of the second hinge shaft (521) has a semicircular second cap (5210), a second cover plate (5211) is provided at one side of the second cap (5210), and a portion of the end of the second hinge shaft (521) is stopped by the second cover plate (5211).

4. The pretensioned slewing device of claim 1, wherein the pretensioned spring cylinder assembly comprises two connection plates (25) and two pretensioned spring cylinders (20);

the cylinder barrels (21) of the two pre-tightening spring cylinders (20) are fixedly connected with the two connecting plates (25),

the end parts of the two pre-tightening spring cylinders (20) are respectively provided with a first connecting part (232), the end parts of the two connecting plates (25) are respectively provided with a second connecting part (251), and the second connecting parts (251) are opposite to the first connecting parts (232);

the first connecting part (232) is connected with the turning wheel mounting frame (12), and the second connecting part (251) is hinged with the first hinge part (51).

5. The pretensioned slewing device according to claim 4, wherein the two connection plates (25) are arranged in parallel, the first articulation (51) being located between the two second connection portions (251).

6. The pre-tensioning swivel device according to claim 4, characterized in that the pre-tensioning spring cylinder (20) comprises:

the cylinder barrel (21), the cylinder barrel (21) is provided with a hollow cavity (211), the hollow cavity (211) penetrates through the cylinder barrel (21) along the axial direction of the cylinder barrel (21), and one end of the hollow cavity (211) is provided with a stopping part (212);

the pull rod (22) is inserted into the hollow cavity (211), one end of the pull rod (22) is provided with an external thread (222), the other end of the pull rod is connected with a pressing block (221), and the pressing block (221) is arranged in the hollow cavity (211) and can slide in the hollow cavity (211) along the axial direction of the cylinder barrel (21);

the threaded connector (23) is provided with a first connecting part (232) and an internal threaded hole (231) which can be matched with the external thread (222);

the spring (24) is sleeved on the pull rod (22), and the spring (24) is positioned in the hollow cavity (211); the threaded connector (23) is connected with the external thread (222) of the pull rod (22) through the internal threaded hole (231), so that the spring (24) is compressed between the stopping part (212) and the pressing block (221).

7. The pretensioned slewing device according to claim 6, wherein the depth of insertion of the pull rod (22) into the internally threaded hole (231) is adjustable to adjust the pretension of the spring (24).

8. The pre-tightening swiveling device according to claim 6, wherein the pressing piece (221) is connected with the end of the pull rod (22) through a screw structure, and the pressing piece (221) and the hollow cavity (211) form a guiding fit.

9. The pre-tensioning swivel arrangement according to claim 6, characterized in that the pressure piece (221) and/or the stop (212) are provided with a dust ring;

the stopping part (212) is fixedly connected with the cylinder barrel (21) through a thread structure, or the stopping part (212) and the cylinder barrel (21) are integrally formed.

10. The preloaded swivel device of claim 6, wherein the first coupling portion (232) is disposed opposite the internally threaded bore (231), the first coupling portion (232) having a hinge bore (2321).

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