CN220930137U - Rotary bushing and rock drill slewing mechanism - Google Patents

Abstract

In a first aspect, the present application provides a rotary bushing for use in a swing mechanism of a rock drill, the rotary bushing being provided with an oil inlet structure for guiding lubricating oil to a connection end of a driven gear and the rotary bushing. The rotary bushing has the function of guiding lubricating oil, so that a lubricating path between the driven gear and the drill shank is simpler, and the lubricating effect can be further improved. In a second aspect there is also provided a rock drill swing mechanism comprising the rotary bushing provided in the first aspect, the swing mechanism further comprising a lubrication passage in communication with the oil inlet structure of the rotary bushing for passing a lubrication aerosol into the swing mechanism. The lubrication effect of the slewing mechanism is good based on the rotary bushing; through setting up lubrication channel, lubrication channel and rotating bush intercommunication can let in rotation mechanism with lubricated aerial fog, and the cooperation uses lubricated aerial fog, simplifies the oil circuit structure, reduces maintenance cost to can also realize the lubrication function to rotation mechanism.

Description

Rotary bushing and rock drill slewing mechanism

Technical Field

The application relates to the technical field of rock drills, in particular to a rotary bushing and a rock drill slewing mechanism.

Background

The rock drill is a tool for rock exploitation, and mainly comprises an impact mechanism and a rotary mechanism, wherein the impact mechanism is used for impacting a drill shank to provide impact force so that the drill shank can impact rock to break the rock, the rotary mechanism provides continuous and stable rotary energy for the rock drill to work, the rotary mechanism comprises torque and rotating speed, and the rotary mechanism is used for driving the drill shank to rotate, so that the drill shank is impacted by the impact mechanism again after rotating for a certain angle so as to impact the rock, and further grinding effect on impact broken rock is better realized; the rotary mechanism comprises a motor, a box body, a driving gear and a driven gear, wherein the driving gear and the driven gear are arranged in the box body, the motor provides power for the driving gear to rotate, the driving gear is meshed with the driven gear, and the driven gear is connected with the drill shank to drive the drill shank to rotate; in order to reduce the abrasion among parts in the running process of the slewing mechanism, most of lubricating oil can be injected into the slewing mechanism to increase the lubricating effect of the slewing mechanism, reduce the abrasion and prolong the service life.

Among the prior art, can refer to the chinese patent of publication No. CN216767254U, it provides a drilling rod slewing mechanism of rock drill, including box and the drilling rod of setting in the box, still include gear wheel, pinion and gyration motor, the drilling rod sets up in the axle center hole of gear wheel, be equipped with the spline on the inner wall in the axle center hole of gear wheel, be equipped with the spline groove on the outer wall of drilling rod, the spline with the spline groove cooperatees, the pinion sets up the upper end of gear wheel, the external tooth of pinion with the external tooth of gear wheel meshes, the axle center of pinion is equipped with the mounting hole, the output shaft of gyration motor is fixed to be set up in the mounting hole, the output shaft drive of gyration motor the pinion rotates, the pinion drive the gear wheel rotates and drives the drilling rod rotates. Further: the box is provided with an oil hole, and a straight-through type pressure oil cup is arranged on the oil hole.

In the above technical solution, referring to fig. 10, a schematic structural diagram of a drill rod revolving mechanism of a rock drill in the prior art is shown, and it can be seen from the diagram that an oil hole and a through type oil pressing cup are arranged at the upper end of a pinion, and through arranging the oil hole on a box body, the through type oil pressing cup 12 is installed on the oil hole, and lubricating oil can be injected into the oil hole through the through type oil pressing cup 12, so that the lubricating oil can not only act on the first bearing 7, the second bearing 8 and the third bearing 9, but also act on the external teeth of the pinion 4 of the large gear 3, thereby increasing the lubricating effect, reducing wear and prolonging the service life. When the lubricating oil is required to act on the gear of the large gear, the flow stroke is longer, the lubricating effect is lower, and the lubricating oil is difficult to act between the drill rod and the large gear, so that the lubricating effect between the drill rod and the large gear is poorer, and then the abrasion between the drill rod and the large gear is larger, the abrasion of the drill rod is easy to cause, and the service life of the slewing mechanism is reduced; in addition, the lubrication mode needs to periodically check the oil quantity of the lubricating oil, otherwise, the temperature of the slewing mechanism is easy to be too high, and parts are easy to be damaged.

In summary, the prior art has further improvements to the slewing mechanism.

Disclosure of utility model

In view of the above technical problems, in one aspect, the present application provides a rotary bushing, which is applied to a swing mechanism of a rock drill, the rotary bushing is used for supporting a driven gear in the swing mechanism, and the rotary bushing has an oil inlet structure, and can guide lubricating oil into the rear end of the driven gear for lubrication; in a second aspect, the application also provides a rock drill swing mechanism comprising the rotary bushing provided in the first aspect, having good lubrication properties to improve the service life of the swing mechanism.

In a first aspect, the application provides a rotary bushing, which is applied to a swing mechanism of a rock drill, wherein an oil inlet structure is arranged on the rotary bushing and is used for guiding lubricating oil to a connecting end of a driven gear and the rotary bushing.

Compared with the prior art, the rotary bushing provided by the application has the advantages that the oil inlet structure is arranged, lubricating oil can be directly fed into the connecting end surface of the rotary bushing and the driven gear, compared with the lubricating path in the prior art, the lubricating path is shorter, the lubricating effect of the lubricating oil on the drill shank and the driven gear can be increased, the abrasion between the drill shank and the driven gear and between the driven gear and the rotary bushing is reduced, and the service lives of the drill shank, the driven gear and the rotary bushing are prolonged, so that the service life and the working efficiency of the slewing mechanism are further improved; compared with the prior art, the application is used for simplifying the lubrication path between the driven gear and the drill shank, and can further improve the lubrication effect.

In some alternative embodiments, the oil inlet structure includes oil inlet holes communicating opposite ends of the rotating bush in an axial direction, the oil inlet holes being used for guiding the lubricating oil.

In some alternative embodiments, the oil inlet structure comprises at least one oil inlet groove arranged on the inner wall of the rotary bushing, and the oil inlet groove is communicated with the oil inlet hole;

The oil inlet groove is arranged on an end face close to one end of the driven gear along the radial direction of the rotary bushing.

In some alternative embodiments, the oil inlet structure further comprises an oil inlet groove, wherein the oil inlet groove is communicated with the oil inlet hole;

The oil inlet groove is circumferentially arranged on the end face of the rotary bushing far away from one end of the oil inlet groove.

In some alternative embodiments, the oil feed slot includes an open end and a closed end;

The oil inlet structure comprises at least two oil inlet grooves, wherein the arrangement of the open ends and the closed ends of the two oil inlet grooves along the radial direction is opposite.

In some alternative embodiments, the axis of the rotary bushing is taken as a reference line, and the hole axis of the oil inlet hole forms an included angle with the axis of the rotary bushing, and the included angle is 5-30 degrees.

In some alternative embodiments, the rotating bushing includes a support structure including an axial support and a radial support, the axial support being connected to the radial support;

The radial supporting part is used for radially limiting and supporting the driven gear;

the axial supporting part is used for axially limiting and supporting the driven gear;

wherein, the oil inlet structure is arranged on the axial supporting part.

In some alternative embodiments, the radial support is provided with at least one lubrication groove circumferentially disposed on an inner wall of the radial support.

In some alternative embodiments, the rotating bushing is provided with a dismounting step, which is circumferentially arranged at the end remote from the driven gear.

The rotary bushing of the application has at least the following technical effects:

By arranging the oil inlet structure on the rotary bushing, a lubricating path for lubricating the drill shank and the driven wheel teeth can be shortened, and a lubricating effect can be quickly achieved, so that a lubricating effect is enhanced;

Through setting up bearing structure in order to carry out axial and circumference to driven gear and support to have better bearing performance, thereby increase the stability of driven gear's operation.

In a second aspect, the present application also provides a rock drill swing mechanism comprising a rotary bushing according to any one of the embodiments described above, wherein the swing mechanism further comprises a lubrication channel in communication with the oil inlet structure of the rotary bushing for letting in a lubrication aerosol into the swing mechanism.

The application relates to a rock drill slewing mechanism, which has at least the following technical effects:

Based on the rotary bushing, the lubricating path of the drill shank and the driven gear of the rotary mechanism is shorter, and the lubricating effect of the rotary mechanism is better, so that the service life of the rotary mechanism is prolonged;

Through the arrangement of the lubrication channel, the lubrication channel is communicated with the rotary bushing, so that the lubrication aerosol can be introduced into the rotary mechanism to be matched with the rotary mechanism, and compared with the mode of driving the lubricating grease in the prior art, the lubricating grease injection device does not need to periodically check the oil quantity of the lubricating grease, does not need to periodically increase the lubricating grease, does not need to additionally increase a pipeline, and can realize the lubrication function of the rotary mechanism.

Drawings

Fig. 1 is a schematic cross-sectional view of a rock drill swing mechanism according to an embodiment of the application;

FIG. 2 is a schematic perspective view of a rotary bushing according to an embodiment of the present application;

FIG. 3 is a schematic perspective view of a rotary bushing according to an embodiment of the present application;

FIG. 4 is a schematic side view of a rotating bushing of an embodiment of the application;

FIG. 5 is a schematic cross-sectional view of a rotating bushing according to an embodiment of the application;

FIG. 6 is an enlarged partial schematic view of FIG. 1;

FIG. 7 is an enlarged partial schematic view of FIG. 2;

FIG. 8 is an enlarged partial schematic view of FIG. 3;

FIG. 9 is an enlarged partial schematic view of FIG. 5;

Fig. 10 is a schematic view of a prior art drill rod turning mechanism of a rock drill.

Reference numerals:

1. rotating the bushing; 2. a driven gear; 3. a case; 4. a lubrication channel;

11. an oil inlet structure; 12. A support structure; 13. Disassembling the step;

111. An oil inlet groove; 112. An oil inlet hole; 113. An oil inlet ditch;

121. an axial support portion; 122. A radial support portion;

1111. an open end; 1112. a closed end; 1221. and a lubrication groove.

Detailed Description

In order to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present disclosure.

In the description of the present application, the description of the first and second is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implying the number of technical features indicated or the precedence of the technical features indicated.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present application.

The application is described in further detail below with reference to the accompanying drawings, see for example figures 1 to 10.

In a first aspect, the application provides a rotary bushing 1, which rotary bushing 1 is typically applied to a turning gear of a rock drill, but can of course be applied to other turning gears if necessary, typically comprising a driven gear 2 and a drill tool; the rotary bushing 1 is arranged at the rear side of the driven gear 2 of the rotary mechanism, a contact surface is arranged between the rotary bushing 1 and the driven gear 2, the rotary bushing 1 can be used for supporting the rotary mechanism, and the rotary bushing 1 is provided with a mounting hole for sleeving on the drill shank of the drill tool;

In this embodiment, as shown in fig. 1, an oil inlet structure 11 is disposed on a rotary bushing 1, where the oil inlet structure 11 is used to guide lubricating oil to a connection end between a driven gear 2 and the rotary bushing 1, as can be seen in fig. 6, when the lubricating oil can directly flow into a space between the rotary bushing 1 and the driven gear 2 through the oil inlet structure 11, compared with a lubrication mode in the prior art, in this embodiment, a lubrication path of a connection part between the driven gear 2 and the rotary bushing 1 and a drill shank is shorter, and the lubrication path is simpler, so that the driven gear 2 and the rotary bushing 1, the driven gear 2 and the drill shank can be more rapidly subjected to the action of the lubricating oil, thereby enhancing the lubrication effect, reducing the abrasion between the drill shank and the driven gear 2 and the rotary bushing 1, and further increasing the service lives of the tail, the driven gear 2 and the rotary bushing 1, and further improving the service life and the working efficiency of the rotary mechanism.

In another alternative embodiment of the present application, as shown in fig. 5, the oil inlet structure 11 includes an oil inlet 112, and the oil inlet 112 communicates with opposite ends of the axial direction of the rotary bushing 1, so that external lubricating oil can be used to be sent to a connection surface between the rotary bushing 1 and the driven gear 2 through the oil inlet 112, so that the lubricating oil can lubricate a connection mating surface between the driven gear 2 and the rotary bushing 1 and the drill shank, thereby reducing abrasion and prolonging service life; in this embodiment, the oil inlet 112 is connected to two opposite ends of the rotating bush 1 in the axial direction, and is structurally substantially disposed along the axial direction, compared with the lubrication path flowing along the radial direction in the prior art, the lubrication path directly acting on the rear side (right side) of the driven gear 2 in this embodiment is relatively short, so that the lubrication between the driven gear 2 and the shank adapter, and the rotating bush 1 can be quickly and more directly lubricated, and the lubrication effect is better than that in the prior art, so that the abrasion is smaller, and the service life is longer.

Further, in this embodiment, as shown in fig. 4, at least one oil inlet 112 is provided, which is disposed at equal intervals along the circumferential direction of the rotary liner 1, so that the lubricant can be more uniformly guided, and the lubricant amount at each part of the rotary liner 1 is more uniform, so that the lubrication effect is also uniform and stable.

Further, as shown in fig. 5 and 6, the axis of the rotary bushing 1 is taken as a reference line, the hole axis of the oil inlet 112 and the axis of the rotary bushing 1 have an included angle θ, and the included angle θ is 5 ° -30 °; as shown in fig. 6, the lubricating oil flows from the rear end to the front end to enter between the rotating bush 1 and the driven gear 2, and the rear end of the oil inlet 112 is higher than the front end by inclining the oil inlet 112 to the axial direction, so that the lubricating oil can flow to the oil inlet groove 111 more quickly by means of gravitational potential energy when the oil inlet 112 flows, and the lubricating efficiency of the lubricating oil is increased.

Further, the included angle θ is 15 °, so that the height of the radial direction is controlled within a certain range, so that the front end of the oil inlet 112 can be located on the rotary bushing 1, and a fast acceleration effect can be caused to the lubricating oil.

In an alternative embodiment of the present application, the oil feed structure 11 is further modified; as shown in fig. 3 and 4, the oil inlet structure 11 further includes at least one oil inlet groove 111 disposed on the inner wall of the rotary bushing 1, where the oil inlet groove 111 communicates with the oil inlet hole 112, as shown in fig. 9, the oil inlet groove 111 is recessed toward the oil inlet hole 112 along the axial direction, and the oil inlet groove 111 is disposed on an end surface near one end of the driven gear 2 along the radial direction of the rotary bushing 1, so that the lubricant forms a larger lubrication area on the connection surface of the rotary bushing 1 and the driven gear 2, as shown in fig. 6, the lubricant can flow along the radial direction, so that the lubricant can more quickly and conveniently enter the axial connection surface or the radial connection surface where the rotary bushing 1 and the driven gear 2 are connected, thereby forming a layer of hydraulic oil film on the rear side of the driven gear 2, and the hydraulic oil film can absorb the reaction force generated by the driven gear 2 in the working process, thereby reducing wear to a certain extent, and being beneficial to prolonging the service life of the rotary bushing 1 and the driven gear 2.

Further, as shown in fig. 4, the oil inlet groove 111 includes an open end 1111 and a closed end 1112, and the open end 1111 is capable of flowing out lubricating oil; the oil feed structure 11 includes at least two oil feed grooves 111, wherein the open ends 1111 and the closed ends 1112 of the two oil feed grooves 111 are disposed opposite to each other in the radial direction; the advantage of this is that the open end 1111 of the at least one oil inlet groove 111 is close to the center direction of the rotating liner 1, and the open end 1111 of the at least one oil inlet groove 111 is close to the outer wall of the rotating liner 1, so that after the lubricating oil flows to the oil inlet groove 111 through the oil inlet hole 112, the lubricating oil can flow to the inner axial wall and the inner radial wall of the rotating liner 1 in the radial direction more quickly, thereby enabling the lubricating oil to perform a lubricating function more quickly, and the oil film can be formed more quickly.

Further, the oil inlet grooves 111 are arranged at equal intervals along the circumferential direction of the rotary bushing 1, so that the circulation of the lubricating oil is uniform, and the formation of the oil film is uniform and stable.

Further, the number of the oil inlet grooves 111 is 8, the number of the oil inlet grooves 111 facing different directions is 4, and the oil inlet grooves 111 facing opposite directions are staggered, so that the circulation of lubricating oil is uniform, and the forming of an oil film is uniform and stable.

In an alternative embodiment of the present application, the oil feed structure 11 is further modified; as shown in fig. 2, 6 and 7, the oil inlet structure 11 further includes an oil inlet channel 113, and the oil inlet channel 113 is communicated with the oil inlet hole 112; the oil feed groove 113 is circumferentially provided on the end surface of the rotary liner 1 at the end remote from the oil feed groove 111. In this embodiment, the oil inlet groove 113 is recessed toward the center of the rotary bushing 1 along the axial direction, and the oil inlet groove 113 is disposed along the circumferential direction in which the oil inlet hole 112 is located, that is, the oil inlet end (rear end) of the oil inlet hole 112 is located in the oil inlet groove 113, the oil inlet groove 113 is communicated with an oil inlet container, the groove width of the oil inlet groove 113 is larger than the aperture of the oil inlet hole 112, the oil inlet groove 113 has a certain oil storage effect, so that lubricating oil can be temporarily buffered in the oil inlet groove 113, and when the oil inlet hole 112 is filled with oil, the oil inlet groove 113 has a distribution effect, so that each oil inlet hole 112 disposed along the oil inlet groove 113 can uniformly feed, which is beneficial to uniform lubrication.

In a further alternative embodiment of the application, the rotating bushing 1 is further modified; as shown in fig. 1 to 3 and 5, the rotary bushing 1 includes a support structure 12, the support structure 12 includes an axial support portion 121 and a radial support portion 122, the axial support portion 121 is connected to the radial support portion 122, and the radial support portion 122 is connected to a front end of the circumferential support portion; as shown in fig. 5, the radial supporting portion 122 is sleeved on the outer wall of the driven gear 2, and the radial supporting portion 122 is used for radially limiting and supporting the driven gear 2, so that the displacement of the driven gear 2 in the radial direction is limited, and the connection stability of the driven gear 2 in the radial direction is ensured; the axial supporting portion 121 acts on the rear side of the driven gear 2, and the axial supporting portion 121 is used for axially limiting and supporting the driven gear 2, so that the displacement of the driven gear 2 in the axial direction is limited, and the connection stability of the driven gear 2 in the axial direction can be ensured;

Further, as shown in fig. 5, the oil feed structure 11 is provided on the axial support portion 121, thereby facilitating shortening of the lubrication path to the driven gear 2.

Further, as shown in fig. 5, the radial supporting portion 122 and the axial supporting portion 121 are basically cylindrical, the diameters of the outer walls of the radial supporting portion 122 and the axial supporting portion 121 are the same, the diameter of the inner wall of the radial supporting portion 122 is larger than that of the inner wall of the axial supporting portion 121, the diameter of the inner wall of the radial supporting portion 122 is slightly larger than the outer diameter of the rear end of the driven gear 2, and therefore the clamping caused by the tensioning of parts due to heating in the rotating process can be reduced, and on the other hand, lubricating oil can enter a gap between the radial supporting portion 122 and the driven gear 2 to play a role in lubrication and heat dissipation; the diameter of the inner wall of the axial support portion 121 is smaller than or equal to the inner diameter of the rear end face of the driven gear 2, so that the support effect of the rotating bush 1 on the driven gear 2 is better.

Further, as shown in fig. 9, at least one lubrication groove 1221 is provided on the radial support portion 122, the lubrication groove 1221 is circumferentially provided on the inner wall of the radial support portion 122, the lubrication groove 1221 is recessed toward a direction away from the rotation bushing 1, so that lubrication oil can enter a portion where the rotation bushing 1 is circumferentially connected with the driven gear 2, lubrication is performed on the portion, dry grinding of the rotation bushing 1 and the driven gear 2 is reduced, and also because lubrication oil is injected into the lubrication groove 1221, supporting effect can be generated on the driven gear 2, and probability of the driven wheel being stuck is reduced.

In a further alternative embodiment of the application, the rotating bushing 1 is further modified; as shown in fig. 6, the rotary bushing 1 is provided with a disassembly step 13, and the disassembly step 13 is circumferentially arranged at one end far away from the driven gear 2; the disassembly step 13 is recessed in the direction close to the driven gear 2 along the axial direction, the inner diameter of the disassembly step 13 is larger than the inner diameter of a mounting hole of the rotary bushing 1, which is connected with the drill shank, and the inner diameter of the disassembly step 13 is smaller than the hole diameter of the box body 3, so that when disassembly is performed, a special tool can be inserted into the disassembly step 13, the rotary bushing 1 can be directly disassembled by a worker conveniently, the disassembly procedure is simplified, and the disassembly cost is saved.

In a second aspect, the present application provides a rock drill turning gear, as shown in fig. 1 and 6, comprising a rotary bushing 1 according to any one of the above embodiments, wherein the turning gear further comprises a lubrication channel 4, the lubrication channel 4 being arranged on a housing 3, which is arranged in an axial direction, the lubrication channel 4 being in communication with an oil inlet structure 11 of the rotary bushing 1 for letting in a lubrication aerosol into the turning gear;

in the embodiment, by using the rotary bushing 1 provided in the first aspect, the lubrication path between the driven gear 2 in the rotary mechanism and the rotary bushing 1 and the drill shank is shorter, so that the lubrication effect is improved, smooth rotation of the rotary mechanism is ensured, the working efficiency is improved, and the abrasion of parts is reduced, so that the service life of the rotary mechanism is prolonged;

In the embodiment, the rotating mechanism is lubricated by adopting the lubricating aerosol, and the lubricating aerosol is oil mist, is a self-lubricating material and has a good lubricating effect; compared with the traditional method of driving in the lubricating grease, the traditional lubricating method needs to check the oil quantity of the lubricating grease at random, otherwise, the temperature of the slewing mechanism is easy to be too high, and the parts are easy to be damaged; in the embodiment, after the lubricating aerosol is matched with the oil inlet structure 11 of the rotary bushing 1, the lubricating aerosol can be directly connected into the rotary mechanism, namely, an additional pipeline is not needed, the lubricating function of the rotary mechanism can be realized, meanwhile, due to the circulation effect in an oil way, heat generated by the movement of the rotary mechanism can be effectively brought out of the rock drill through the flow of the lubricating aerosol, the heat radiation capability of the rock drill is further improved, the service life of parts of the rotary mechanism is prolonged, and the use and maintenance cost is reduced;

In this embodiment, as shown in fig. 1 and fig. 4, the lubricating aerosol acts on the passive gear 2 to form an oil film, so that the reaction force formed by energy rebound in the rock drilling process of the rock drill can be absorbed to a certain extent, and the loss of the drill shank can be reduced to a certain extent, so as to improve the service life of the equipment.

It should be noted that, in the case that the embodiments of the present application do not conflict with the solutions and the technical solutions can coexist, new embodiments may be arbitrarily combined.

The foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the application that follows may be better understood, and in order that the present application may be better understood. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.

Claims (10)

1. The rotary bushing is applied to a swing mechanism of a rock drill, and is characterized in that an oil inlet structure (11) is arranged on the rotary bushing (1), and the oil inlet structure (11) is used for guiding lubricating oil to the connecting end of a driven gear (2) and the rotary bushing (1).

2. The rotating bushing of claim 1 wherein the rotating bushing,

The oil inlet structure (11) comprises an oil inlet hole (112), wherein the oil inlet hole (112) is communicated with two opposite ends of the rotating bush (1) in the axial direction, and the oil inlet hole (112) is used for guiding lubricating oil.

3. The rotating bushing of claim 2 wherein the rotating bushing,

The oil inlet structure (11) comprises at least one oil inlet groove (111) arranged on the inner wall of the rotary bushing (1), and the oil inlet groove (111) is communicated with the oil inlet hole (112);

The oil inlet groove (111) is arranged on an end face close to one end of the driven gear (2) along the radial direction of the rotary bushing (1).

4. The rotating bushing of claim 3 wherein the rotating sleeve comprises a sleeve,

The oil inlet structure (11) further comprises an oil inlet groove (113), and the oil inlet groove (113) is communicated with the oil inlet hole (112);

the oil inlet groove (113) is circumferentially arranged on the end face of the rotary bushing (1) far away from one end of the oil inlet groove (111).

5. The rotating bushing of claim 3 wherein the rotating sleeve comprises a sleeve,

The oil inlet groove (111) comprises an opening end (1111) and a closed end (1112);

the oil inlet structure (11) comprises at least two oil inlet grooves (111), wherein the arrangement of the open ends (1111) and the closed ends (1112) of the two oil inlet grooves (111) along the radial direction is opposite.

6. The rotating bushing of claim 2 wherein the rotating bushing,

And taking the axis of the rotary bushing (1) as a reference line, wherein an included angle is formed between the axis of the oil inlet hole (112) and the axis of the rotary bushing (1), and the included angle is 5-30 degrees.

7. The rotating sleeve according to any one of claims 1 to 6, wherein,

The rotary bushing (1) comprises a support structure (12), the support structure (12) comprises an axial support (121) and a radial support (122), the axial support (121) is connected with the radial support (122);

The radial supporting part (122) is used for radially limiting and supporting the driven gear (2);

The axial supporting part (121) is used for axially limiting and supporting the driven gear (2);

Wherein the oil inlet structure (11) is arranged on the axial supporting part (121).

8. The rotating bushing of claim 7 wherein the rotating sleeve comprises a sleeve,

At least one lubrication groove (1221) is arranged on the radial supporting part (122), and the lubrication groove (1221) is circumferentially arranged on the inner wall of the radial supporting part (122).

9. The rotating sleeve according to any one of claims 1 to 6, wherein,

The rotary bushing (1) is provided with a disassembly step (13), and the disassembly step (13) is circumferentially arranged at one end far away from the driven gear (2).

10. A rock drill turning gear comprising a rotary bushing according to any of the preceding claims 1-9, wherein the turning gear further comprises a lubrication channel (4), which lubrication channel (4) communicates with an oil inlet structure (11) of the rotary bushing (1) for letting in lubrication aerosol into the turning gear.