CN219345300U

CN219345300U - Bearing cooling structure

Info

Publication number: CN219345300U
Application number: CN202320237464.9U
Authority: CN
Inventors: 候振国; 刘宝钢; 李利强; 焦维鹏; 周路; 贺焕龙
Original assignee: Tongyu Heavy Industry Co Ltd
Current assignee: Tongyu Heavy Industry Co Ltd
Priority date: 2023-02-15
Filing date: 2023-02-15
Publication date: 2023-07-14
Anticipated expiration: 2033-02-15

Abstract

The utility model relates to the technical field of machining equipment, in particular to a bearing cooling structure which is applied to a boring and milling machine, wherein the boring and milling machine comprises a machine base, a ram and a hollow sleeve, the ram is movably connected with the machine base along a first direction, the hollow sleeve is rotationally connected with the ram, a rotation axis is parallel to the first direction, a bearing is arranged between the hollow sleeve and the ram, and the bearing cooling structure comprises: the oil inlet channel is arranged on the ram, one end of the oil inlet channel is communicated with the mounting area of the bearing, and the other end of the oil inlet channel forms an oil inlet for connecting external oil supply equipment; the oil return channel is arranged on the ram, one end of the oil return channel is communicated to the mounting area of the bearing, and the other end of the oil return channel forms an oil outlet for connecting with external oil recovery equipment. According to the utility model, under the condition of ensuring that the ram structure is unchanged, the oil inlet and oil return channels are added in the ram so as to realize the cooling and lubrication of circulating thin oil of the hollow sleeve bearing in the compact ram.

Description

Bearing cooling structure

Technical Field

The utility model relates to the technical field of machining equipment, in particular to a bearing cooling structure.

Background

With the development of casting and forging technologies, the shapes and machining allowance of various large-sized cast forgings are smaller and smaller, and the low-speed large-torque boring and milling machine which is originally suitable for processing workpieces with large blank allowance and poor cast forgings shape forming cannot meet the market competition requirement. The boring and milling machine has the advantages of low spindle rotating speed, low machining efficiency and poor surface quality of machined workpieces.

Under the condition that the structure and the lubrication mode of the existing boring box and the main shaft are unchanged, the main shaft is accelerated, the phenomena of too fast temperature rise and too high temperature of the hollow sleeve main shaft bearing exist, the service life of equipment is seriously influenced, and the phenomenon of locking of the hollow sleeve main shaft exists when the temperature is too high.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model aims to provide a bearing cooling structure capable of controlling the temperature rise of a working bearing for a long time running after the spindle is accelerated by a boring and milling machine without changing the ram structure.

To achieve the above and other related objects, the present utility model provides a bearing cooling structure for a boring and milling machine, the boring and milling machine including a housing, a ram movably connected to the housing along a first direction, and a hollow sleeve rotatably connected to the ram with a rotation axis parallel to the first direction, wherein a bearing is provided between the hollow sleeve and the ram, the bearing cooling structure comprising:

the oil inlet channel is arranged on the ram, one end of the oil inlet channel is communicated with the mounting area of the bearing, and the other end of the oil inlet channel forms an oil inlet for connecting external oil supply equipment;

the oil return channel is arranged on the ram, one end of the oil return channel is communicated to the mounting area of the bearing, and the other end of the oil return channel forms an oil outlet for connecting with external oil recovery equipment.

In an alternative embodiment of the utility model, the oil inlet channel is provided with a plurality of oil distributing pipes, one ends of the oil distributing pipes are connected to the end face of the bearing, and the other ends of the oil distributing pipes are connected with the oil supply equipment.

In an alternative embodiment of the utility model, a plurality of said bearings are provided between said hollow sleeve and said ram.

In an alternative embodiment of the present utility model, a bearing seat is provided in the bearing mounting area of the ram, and an oil inlet spacer attached to at least one side of the bearing is provided in the bearing seat.

In an alternative embodiment of the present utility model, an oil passage is provided in the oil inlet spacer, one end of the oil passage is connected to the oil distributing pipe, and the other end is connected to an end face of the bearing.

In an alternative embodiment of the utility model, a communicating part is arranged at the bottom of the oil inlet spacer, and the communicating part is used for leading the solution in the bearing to the oil return channel.

In an alternative embodiment of the present utility model, the oil inlet spacer is provided with a groove and at least two oil holes, and the groove connects the oil holes.

In an optional embodiment of the present utility model, a mounting hole is provided on the ram corresponding to a connection between the oil distribution pipe and the oil inlet spacer.

In an alternative embodiment of the present utility model, a fixing member is disposed in the ram, the fixing member is provided with a sleeve, and the oil distributing pipe penetrates through the sleeve.

In an alternative embodiment of the present utility model, the ram is provided with a fixing hole for installing the fixing member.

The utility model has the technical effects that under the condition that the ram structure is unchanged and the space of the ram is limited, an oil inlet channel and an oil return channel are added in the ram to increase a recyclable thin oil lubrication channel, so that the cooling and lubrication of the circulating thin oil of the hollow sleeve bearing in the compact ram are realized; according to the structural form and space of the paired combined bearing sets, an oil inlet spacer bush is arranged, and an oil duct and a communicating part for oil return are arranged on the oil inlet spacer bush, so that fixed-point quantitative oil supply and smooth discharge of lubricating oil at specific positions of paired combined bearings in a limited space are realized; according to the structural form and the space of the paired combined bearing sets, the fixing piece for fixing the oil distributing pipe is added, so that the play of the fulcrum-free oil distributing pipe is effectively avoided, and the fixed-point oil supply of the paired combined bearings is ensured.

Drawings

FIG. 1 is an enlarged view of a portion of a ram of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 2 is a side view of a ram of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 3 is a schematic view of an oil feed spacer installation of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 4 is a side view of an oil feed spacer of a bearing cooling structure provided in accordance with an embodiment of the present utility model;

FIG. 5 is a front view of an oil feed spacer of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 6 is an enlarged view of an oil passage of an oil intake spacer of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 7 is a schematic illustration of another oil feed spacer installation of a bearing cooling structure provided in accordance with an embodiment of the present utility model;

FIG. 8 is an enlarged view of an oil gallery of another oil feed spacer of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 9 is another side view of an oil feed spacer of a bearing cooling structure provided in accordance with an embodiment of the present utility model;

FIG. 10 is a front view of another oil feed spacer of a bearing cooling structure provided in accordance with an embodiment of the present utility model;

FIG. 11 is a schematic illustration of another oil feed spacer structure of a bearing cooling structure provided in accordance with an embodiment of the present utility model;

FIG. 12 is a schematic view of a fixture mounting of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 13 is a front view of a fixture of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 14 is another fixture side view of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 15 is another fixture mounting schematic view of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 16 is a front view of another fixture of a bearing cooling structure provided by an embodiment of the present utility model;

FIG. 17 is a ram cross-sectional view of a bearing cooling structure provided by an embodiment of the utility model;

FIG. 18 is an enlarged view of the ram tail end of a bearing cooling structure provided by an embodiment of the utility model;

FIG. 19 is a schematic view of a ram retracted state of a bearing cooling structure provided by an embodiment of the present utility model;

fig. 20 is a schematic view showing a ram extension state of a bearing cooling structure according to an embodiment of the present utility model.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

An enlarged view of the connection of the ram and the hollow sleeve of the bearing cooling structure according to the embodiment of the present utility model is shown in fig. 1, and a side view of the ram of the bearing cooling structure according to the embodiment of the present utility model is shown in fig. 2.

Referring to fig. 1 and 2, a bearing cooling structure is applied to a boring and milling machine, the boring and milling machine includes a base, a ram 100 and a hollow sleeve 200, the ram 100 is movably connected with the base along a first direction, the hollow sleeve 200 is rotatably connected with the ram 100, a rotation axis is parallel to the first direction, a bearing 300 is disposed between the hollow sleeve 200 and the ram 100, and the bearing cooling structure includes: an oil inlet channel 110, disposed on the ram 100, wherein one end of the oil inlet channel 110 is connected to the mounting area of the bearing 300, and the other end forms an oil inlet for connecting with an external oil supply device; the oil return channel 120 is disposed on the ram 100, one end of the oil return channel 120 is connected to the mounting area of the bearing 300, and the other end forms an oil outlet for connecting with an external oil recovery device.

Specifically, in order to avoid damaging the side wall of the ram 100 and affecting the strength and rigidity of the ram 100, two through holes with the diameter of 20mm are drilled at the bearing seat where the bearing 300 is installed and close to the bevel inner wall of the ram 100 to form the oil inlet channel 110 and the oil return channel 120, and the temperature rise of the working bearing for long-time running of the main shaft after the speed of the boring and milling machine is accelerated is controllable by circularly lubricating and cooling the bearing 300 of the original hollow sleeve 200 in the compact square ram 100 by utilizing thin oil. The cooling structure of the bearing 300 provided by the utility model can be suitable for a horizontal boring and milling machine and also suitable for a vertical boring and milling machine, namely, the first direction can be transverse or longitudinal, and in the specific embodiment of the utility model, the scheme is illustrated by taking the first direction as the transverse direction, namely, the horizontal boring and milling machine as a preferable scheme.

In an embodiment, the oil inlet passage 110 is provided with a plurality of oil distribution pipes 130, one end of the oil distribution pipe 130 is connected to the end surface of the bearing 300, and the other end is connected to the oil supply apparatus.

In one embodiment, a plurality of bearings 300 are provided between the hollow sleeve 200 and the ram 100.

Specifically, a plurality of oil distribution pipes 130 may be disposed in the oil inlet channel 110 to precisely lubricate and cool a plurality of bearings 300 between the hollow sleeve 200 and the ram 100, so that one end of the oil distribution pipe 130 is connected to an oil supply device to feed oil, and the other end is connected to the bearings 300 to lubricate and cool the bearings.

In an embodiment, a bearing seat is disposed in the mounting area of the bearing 300 in the ram 100, and an oil inlet spacer 400 attached to at least one side of the bearing 300 is disposed in the bearing seat.

In an embodiment, an oil passage 410 is provided in the oil inlet spacer 400, one end of the oil passage 410 is connected to the oil distributing pipe 130, and the other end is connected to an end surface of the bearing 300.

Specifically, a region between the ram 100 and the hollow sleeve 200 where the bearing 300 is installed is referred to as a bearing housing, and in the bearing housing, at least one side of the bearing 300 is attached to an oil inlet spacer 400. In combination with the installation schematic diagram of the oil inlet spacer 400 in fig. 3, when the oil inlet spacer 400 is only attached to one side of the bearing 300, the oil inlet spacer 400 is connected with the oil distributing pipe 130, and the end face attached to the bearing 300 is precisely lubricated and cooled through the oil duct 410 in the oil inlet spacer 400; as shown in a side view of the oil feed spacer 400 in fig. 4 and an enlarged view of the oil passage 410 of the oil feed spacer 400 in fig. 6, the oil passage 410 of the oil feed spacer 400 may include a lateral and longitudinal path to communicate the oil distribution pipe 130 with the bearing 300, and the lateral path of the oil passage 410 may be aligned with the balls of the bearing 300 to precisely and efficiently spray the thin oil to the balls of the bearing 300 for lubrication and cooling. In combination with the installation schematic diagram of another oil inlet spacer 500 shown in fig. 7 and the schematic diagram of the oil duct 510 of another oil inlet spacer 500 shown in fig. 8, when the oil inlet spacer 500 is arranged between the two bearings 300, that is, when the two sides of the oil inlet spacer 500 are attached to the bearings 300, the oil inlet spacer 500 communicates the oil distributing pipe 130 with the bearings 300 attached to the two sides, the transverse path of the oil duct 510 penetrates through the oil inlet spacer 500, and when the oil inlet spacer 500 is connected with the oil distributing pipe 130, the bearings 300 attached to the two sides can be precisely lubricated and cooled simultaneously through the oil duct 510.

In an embodiment, a communicating portion 420 is disposed at the bottom of the oil inlet spacer 400, and the communicating portion 420 communicates the solution in the bearing 300 to the oil return channel 120.

Specifically, as shown in side view and front view of the oil inlet spacer 400 in fig. 4 and 5, a groove is formed on one side of the oil inlet spacer 400, which is attached to the bearing 300, and a communicating part 420 is formed at the bottom; after the oil inlet spacer 400 is connected with the oil distribution pipe 130 and conveys the thin oil into the bearing for cooling and lubrication, the thin oil returns to the communication part 420 along the gap between the oil inlet spacer 400 and the bearing 300 according to the action of gravity, and then flows into the oil return channel 120. As shown in fig. 9 and 10, in the side view and the front view of the oil inlet spacer 500, in order to save materials, the thickness of the oil inlet spacer 500 is set thinner, and the oil inlet spacer 500 can only fit with the outer ring of the bearing 300, a boss 550 is arranged in the oil inlet spacer 500, an oil duct 510 is arranged in the boss 550, and the oil duct 510 transversely penetrates through the boss 550 to communicate the oil distributing pipe 130 with the end face of the bearing 300 and convey thin oil to the bearing 300; after the thin oil cools and lubricates the bearing 300, the thin oil flows to the bottom of the oil inlet spacer 500 according to the action of gravity and flows into the oil return channel 120 through the communicating part 520 at the bottom of the oil inlet spacer 500, and the rest parts of the oil inlet spacer 500 except the boss 550 are hollow structures, so that the thin oil for lubrication and cooling is conveniently collected to the oil return channel 120.

In one embodiment, the oil inlet spacer 400 is provided with a groove 430 and at least two oil holes 440, and the groove 430 connects the oil holes 440.

Specifically, as shown in the front view of the oil feed spacer 400 in fig. 5, a plurality of oil passages 410 may be provided in the oil feed spacer 400 to enhance cooling and lubrication of the bearing 300. Therefore, the oil inlet spacer 400 is provided with the groove 430 and the at least two oil holes 440, the oil distributing pipe 130 is connected to the groove 430, the groove 430 can connect the at least two oil holes 440, so that the thin oil conveyed by the oil distributing pipe 130 is conveyed to the end face of the bearing 300 through the at least two oil holes 440, and the bearing 300 can be cooled at least twice after rotating for one circle. As shown in the front view of the oil feeding spacer 500 in fig. 10, the oil feeding spacer 500 may be made thinner for saving materials, but at the same time, a boss 550 is added inside the oil feeding spacer 500 to provide an oil passage 510; in order to improve the cooling and lubricating efficiency of the bearing 300, a groove 530 and at least two oil holes 540 may be provided on the oil inlet spacer 500, correspondingly, at least two bosses 550 are provided in the oil inlet spacer 500, the oil distributing pipe 130 is connected to the groove 530, the groove 530 connects at least two oil holes 540 to accelerate the transmission of thin oil to the bearing 300, the bearing 300 rotates for at least two times to realize cooling, and the cooling and lubricating efficiency of the bearing 300 is improved, as shown in the structural schematic diagram of the oil inlet spacer 500 in fig. 11.

In an embodiment, the ram 100 is provided with a mounting hole 140 corresponding to a connection between the oil distribution pipe 130 and the oil inlet spacer 400.

Specifically, as shown in fig. 1 and fig. 2, a mounting hole 140 is drilled and tapped at a joint of the ram 100 corresponding to the oil distribution pipe 130 and the oil inlet spacer 400, a threaded hole is further arranged in the mounting hole 140, and the mounting hole 140 and the threaded hole are used for mounting and sealing the oil distribution pipe 130, so that the oil distribution pipe 130 is tightly connected with the oil inlet spacer 400, and then fixed and plugged by using a jackscrew and a plug; similarly, as shown in fig. 7, the ram 100 is provided with mounting holes 140 corresponding to the connection between the oil distribution pipe 130 and the oil inlet spacer 500, so as to achieve the same function.

In one embodiment, a fixing member 150 is disposed in the ram 100, the fixing member 150 is provided with a sleeve 152, and the oil distributing pipe 130 penetrates the sleeve 152.

In one embodiment, the ram 100 is provided with a fixing hole for mounting the fixing member 150.

Specifically, as shown in fig. 2, a fixing member 150 is provided in the ram 100 for fixing the plurality of oil distribution pipes 130 in the oil inlet passage 110. As shown in fig. 12, 13 and 14, the fixing member 150 is used for restraining and fixing the oil distribution pipe 130, and is formed by welding a screw 151 with a sleeve 152 having an inner diameter of 20mm, and the sleeve 152 can be made of stainless steel. The fixed steel wires are welded on the two sides of the screw 152 on the sleeve 152, so that the sleeve 152 direction of the front and rear fixing pieces 150 is ensured to be consistent as much as possible during installation, the fixing pieces 150 are installed from inside to outside, the fixed steel wires on the two sides are respectively contacted with the circular arcs in the ram 100, and the direction consistency of the front and rear fixing pieces 150 during installation is effectively ensured. The sleeve 152 is sleeved on the oil distributing pipe 130, so that the phenomenon that the rotation of the boring bar is influenced due to the fact that the oil distributing pipe 130 is distributed in a scattered mode due to lack of constraint can be effectively avoided. Accordingly, the ram 100 is provided with a fixing hole for installing the fixing member 150 by being screwed with the screw 151.

As shown in fig. 15 and 16, the fixing member 160 is added to the oil distribution pipe 130 directly connected to the end surface of the bearing 130 for fixing the oil distribution pipe 130 due to the limitation of the installation position in the space. In the front view, the left end of the fixing piece 160 is a thread, the right end is a polished rod, the fixing piece 160 is conveniently installed from outside to inside, an arc groove 161 with the radius of 4mm is arranged on one side of the polished rod connected with the oil distributing pipe 130, the arc groove can be used for installing and positioning the oil distributing pipe 130, and the left end of the fixing piece is provided with a groove, so that the fixing piece can conveniently rotate when in threaded connection with the ram 100. The ram 100 is correspondingly provided with a fixing hole, a fixing nut can be arranged in the hole to position the fixing piece 160, and meanwhile, one side of the fixing piece 160 is provided with a mounting hole 140 for mounting and adjusting the oil distributing pipe 130 to be connected with the end face of the bearing 300.

In a specific embodiment, as shown in fig. 17 and 18, which are an oblique sectional view and an enlarged view of the tail end of the ram 100, an oil distribution block 170 is provided at the tail end of the ram 100, i.e., at a side away from the hollow sleeve 200, and lubricating and cooling thin oil supplied from an external oil supply device is distributed to a plurality of oil distribution pipes 130 through the oil distribution block 170 to be supplied to respective bearings 300 between the ram 100 and the hollow sleeve 200.

A ram 100 retracted state schematic and a ram 100 extended state schematic as shown in fig. 19 and 20. An oil inlet steel pipe 600 and an oil inlet hose 700 are further arranged between the ram 100 and the oil supply equipment, the oil inlet steel pipe 600 is used as a transition oil pipe between the oil distributing block 170 at the tail end of the ram 100 and the oil inlet hose 700, and a device capable of binding the oil pressure pipe to facilitate rotation and movement of the oil pressure pipe, namely a drag chain, is arranged at the hose, so that interference with the existing structure in the boring box when the ram 100 stretches out and retracts in the first direction is avoided.

Under the condition that the structure of the ram is unchanged and the space in the ram is limited, the oil inlet channel 110 and the oil return channel 120 are added in the ram to increase a recyclable thin oil cooling and lubricating channel, so that the cooling and lubrication of the circulating thin oil can be realized when the bearing 300 of the hollow sleeve 200 in the compact ram works at a high speed; according to the structural form and space of the paired combined bearing 300 groups, an oil inlet spacer bush 400 or an oil inlet spacer bush 500 is arranged, and an oil duct 410 and a communicating part 420 for oil return are arranged on the oil inlet spacer bush 400, so that the fixed point, quantitative oil supply and smooth discharge of lubricating oil at specific positions of the paired combined bearings 300 in a limited space are realized; according to the structural form and space of the paired combination bearing 300 sets, the fixing piece 140 for fixing the oil distributing pipe 130 is added, so that the play of the fulcrum-free oil distributing pipe 130 is effectively avoided, and the fixed-point oil supply of the paired combination bearing 300 is ensured.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

In the description herein, numerous specific details are provided, such as examples of components and/or methods, to provide a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that an embodiment of the utility model can be practiced without one or more of the specific details, or with other apparatus, systems, components, methods, components, materials, parts, and so forth. In other instances, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the utility model.

Reference throughout this specification to "one embodiment," "an embodiment," or "a particular embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment, and not necessarily all embodiments, of the present utility model. Thus, the appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics of any specific embodiment of the present utility model may be combined in any suitable manner with one or more other embodiments. It will be appreciated that other variations and modifications of the embodiments of the utility model described and illustrated herein are possible in light of the teachings herein and are to be considered as part of the spirit and scope of the utility model.

It will also be appreciated that one or more of the elements shown in the figures may also be implemented in a more separated or integrated manner, or even removed because of inoperability in certain circumstances or provided because it may be useful depending on the particular application.

In addition, any labeled arrows in the drawings/figures should be considered only as exemplary, and not limiting, unless otherwise specifically indicated. Furthermore, the term "or" as used herein is generally intended to mean "and/or" unless specified otherwise. Combinations of parts or steps will also be considered as being noted where terminology is foreseen as rendering the ability to separate or combine is unclear.

As used in the description herein and throughout the claims that follow, unless otherwise indicated, "a", "an", and "the" include plural references. Also, as used in the description herein and throughout the claims that follow, unless otherwise indicated, the meaning of "in …" includes "in …" and "on …".

The above description of illustrated embodiments of the utility model, including what is described in the abstract, is not intended to be exhaustive or to limit the utility model to the precise forms disclosed herein. Although specific embodiments of, and examples for, the utility model are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present utility model, as those skilled in the relevant art will recognize and appreciate. As noted, these modifications can be made to the present utility model in light of the foregoing description of illustrated embodiments of the present utility model and are to be included within the spirit and scope of the present utility model.

The systems and methods have been described herein in general terms as being helpful in understanding the details of the present utility model. Furthermore, various specific details have been set forth in order to provide a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that an embodiment of the utility model can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, and/or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the utility model.

Thus, although the utility model has been described herein with reference to particular embodiments thereof, a latitude of modification, various changes and substitutions are intended in the foregoing disclosures, and it will be appreciated that in some instances some features of the utility model will be employed without a corresponding use of other features without departing from the scope and spirit of the utility model as set forth. Therefore, many modifications may be made to adapt a particular situation or material to the essential scope and spirit of the present utility model. It is intended that the utility model not be limited to the particular terms used in following claims and/or to the particular embodiment disclosed as the best mode contemplated for carrying out this utility model, but that the utility model will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the utility model should be determined only by the following claims.

Claims

1. The utility model provides a bearing cooling structure, its characterized in that is applied to the boring and milling machine, the boring and milling machine includes frame, ram and hollow cover, the ram along first direction with frame swing joint, hollow cover with the ram rotates to be connected, and the axis of rotation with first direction is parallel, hollow cover with be equipped with the bearing between the ram, bearing cooling structure includes:

2. The bearing cooling structure according to claim 1, wherein the oil inlet passage is provided with a plurality of oil distribution pipes, one ends of which are connected to an end face of the bearing, and the other ends of which are connected to the oil supply device.

3. The bearing cooling structure according to claim 1, wherein a plurality of the bearings are provided between the hollow sleeve and the ram.

4. The bearing cooling structure according to claim 2, wherein a bearing seat is provided in a mounting area of the bearing in the ram, and an oil inlet spacer attached to at least one side of the bearing is provided in the bearing seat.

5. The bearing cooling structure according to claim 4, wherein an oil passage is provided in the oil-intake spacer, one end of the oil passage is connected to the oil-distributing pipe, and the other end is connected to an end face of the bearing.

6. The bearing cooling structure according to claim 4, wherein a communicating portion is provided at a bottom of the oil-feeding spacer, and the communicating portion communicates the solution in the bearing to the oil return passage.

7. The bearing cooling structure according to claim 4, wherein the oil inlet spacer is provided with a groove and at least two oil holes, and the groove connects the oil holes.

8. The bearing cooling structure according to claim 5, wherein the ram is provided with a mounting hole corresponding to a connection between the oil distribution pipe and the oil inlet spacer.

9. The bearing cooling structure according to claim 2, wherein a fixing member is provided in the ram, the fixing member is provided with a sleeve, and the oil distribution pipe penetrates through the sleeve.

10. The bearing cooling structure according to claim 9, wherein the ram is provided with a fixing hole for mounting the fixing member.