CN213359978U

CN213359978U - Transmission case, power head and rotary drilling rig

Info

Publication number: CN213359978U
Application number: CN202022509917.8U
Authority: CN
Inventors: 于帅; 张世平; 刘亚强
Original assignee: Beijing Sany Intelligent Technology Co Ltd
Current assignee: Beijing Sany Intelligent Technology Co Ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-06-04
Anticipated expiration: 2030-11-03

Abstract

The utility model provides a transmission case, include: a box body; the input shaft is rotationally connected with the box body through a connecting piece; the slewing bearing comprises a first ring body and a second ring body, the first ring body is in rotating fit with the second ring body, an anti-overturning part is arranged between the first ring body and the second ring body, the first ring body is in transmission fit with the input shaft, and the second ring body is connected with the box body; and the sleeve is connected with the first ring body. The utility model also provides a unit head, including above-mentioned transmission case and speed reducer, the input shaft links to each other with the speed reducer. The utility model also provides a dig rig soon, including above-mentioned unit head. The anti-overturning part can improve the rated overturning moment of the slewing bearing, so that the sleeve can still keep stable after being subjected to overturning force. The sleeve only needs to be connected with the first ring body, so that the structure of the transmission case is simplified, and the cost is reduced. In addition, only the matching precision of the sleeve and the slewing bearing needs to be ensured when the sleeve is machined, the machining difficulty of the transmission case is reduced, and the cost can be reduced.

Description

Transmission case, power head and rotary drilling rig

Technical Field

The utility model relates to an engineering machine tool field especially relates to a transmission case, unit head and dig rig soon.

Background

At present, a slewing bearing is arranged in a transmission case of a power head of a rotary drilling rig, and the slewing bearing consists of an outer ring and an inner ring which are in running fit. The inner ring is fixed on the shell of the transmission case, the outer ring is linked with the input shaft of the transmission case and the sleeve, and the drill rod is driven to rotate by the sleeve after being driven by the input shaft. The input shaft is rotationally connected with the shell of the transmission case through two bearings. In order to ensure the stability of the sleeve in the rotating process, a bearing is also arranged between the sleeve and the box body.

In the transmission case, the sleeve is in running fit with the shell of the transmission case through the bearing and is also in running fit with the shell of the transmission case through the slewing bearing. Under the support of the bearing and the slewing bearing, the stability of the sleeve is still ensured after the sleeve is subjected to overturning force in the working process.

In the process of machining the sleeve, the matching precision of the sleeve and the bearing and the matching precision of the sleeve and the slewing bearing are guaranteed, and the machining difficulty and the cost are high. In addition, the shell of the transmission case is simultaneously provided with the slewing bearing and the bearing, so that the structure of the transmission case is more complex and the cost is higher.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of large processing difficulty and complex structure of the transmission case in the prior art, one of the purposes of the utility model is to provide the transmission case.

The utility model provides a following technical scheme:

a transmission case applied to a power head, the transmission case comprising:

a box body;

the input shaft is rotationally connected with the box body through a connecting piece;

the slewing bearing comprises a first ring body and a second ring body, the first ring body is in running fit with the second ring body, an anti-overturning part is arranged between the first ring body and the second ring body, the first ring body is in transmission fit with the input shaft, and the second ring body is connected with the box body; and

and the sleeve is connected with the first ring body.

As a further optional scheme of the transmission case, two first annular grooves are formed in a wall of the first ring body facing the second ring body, the two first annular grooves are arranged along an axial direction of the first ring body, two second annular grooves are correspondingly formed in a wall of the second ring body facing the first ring body, and the anti-overturning member includes a plurality of balls embedded in the first annular grooves and the second annular grooves.

As a further optional scheme for the transmission case, a third annular groove is formed in a wall of the first ring body facing the second ring body, an annular protruding block is formed in a wall of the second ring body facing the first ring body, the annular protruding block is located in the third annular groove, the anti-overturning member includes a plurality of first rollers disposed between the annular protruding block and two side walls of the third annular groove, and the first rollers are disposed along a radial line direction of the first ring body.

As a further optional scheme of the transmission case, retainers are respectively arranged between the annular convex block and two side walls of the third annular groove, and the retainers enable the first rollers to be uniformly distributed all the time along the circumferential direction of the first ring body.

As a further alternative to the transmission case, the anti-overturning member further includes a plurality of second rollers disposed between the annular projection and the groove bottom of the third annular groove, and an axis of the second rollers is parallel to an axis of the first ring body.

As a further optional scheme of the transmission case, a plurality of accommodating grooves corresponding to the second rollers are formed in the groove bottom of the third annular groove, the accommodating grooves are uniformly distributed along the circumferential direction of the second ring body, and the second rollers are embedded in the corresponding accommodating grooves.

As a further alternative to the transmission case, the connection is a bearing.

As a further alternative to the transmission case, a gear transmission is provided between the first ring body and the input shaft, and external teeth are integrally formed on the first ring body.

Another object of the utility model is to provide a unit head.

The utility model provides a following technical scheme:

a power head is applied to a rotary drilling rig and comprises the transmission case and a speed reducer, wherein an input shaft is connected with the speed reducer.

It is still another object of the present invention to provide a rotary drilling rig.

The utility model provides a following technical scheme:

a rotary drilling rig comprises the power head.

The embodiment of the utility model has the following beneficial effect:

the anti-overturning part is arranged between the first ring body and the second ring body, and can improve the rated overturning moment of the slewing bearing. On the basis, the sleeve is connected with the first ring body, and is in running fit with the box body through the slewing bearing, so that the sleeve can still keep stable after being subjected to overturning force. Because the sleeve only needs to be connected with the first ring body, a bearing structure is not arranged between the sleeve and the box body, the structure of the transmission case is simplified, and the cost is reduced. In addition, only the matching precision of the sleeve and the slewing bearing needs to be ensured when the sleeve is machined, the machining difficulty of the transmission case is reduced, and the cost can be reduced.

In order to make the aforementioned and other objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

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

Fig. 1 shows a schematic view of an internal structure of a transmission case provided in embodiment 1 of the present invention;

fig. 2 is a schematic view showing an internal structure of a transmission case provided in embodiment 2 of the present invention;

FIG. 3 shows an enlarged schematic view at A in FIG. 2;

fig. 4 shows a schematic view of a slewing bearing in a transmission case provided in embodiment 3 of the present invention.

Description of the main element symbols:

1-a box body; 2-an input shaft; 21-a connector; 3-a slewing bearing; 31-a first collar body; 311-a first annular groove; 312-a third annular groove; 313-an accommodating groove; 32-a second ring body; 321-a second annular groove; 322-annular bumps; 33-an anti-overturning member; 331-balls; 332-a first roller; 333-holder; 334-a second roller; 4-a sleeve; 41-flange plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

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

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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1, the present embodiment provides a transmission case, which is applied to a power head of a rotary drilling rig and transmits a force output by a speed reducer of the power head to a drill rod. The transmission case comprises a case body 1, an input shaft 2, a slewing bearing 3 and a sleeve 4. The input shaft 2 is mounted on the box body 1 through a connecting piece 21, is in running fit with the box body 1, and is connected with a reducer output shaft of the power head. The slewing bearing 3 is composed of a first ring body 31, a second ring body 32 and an anti-overturning part 33, wherein the first ring body 31 is in running fit with the second ring body 32 and is kept stable under the support of the anti-overturning part 33. Wherein, the first ring body 31 is connected with the sleeve 4 and is in transmission fit with the input shaft 2, and the second ring body 32 is connected with the box body 1, so that the sleeve 4 is indirectly connected with the box body 1 in a rotating way.

The anti-overturning member 33 is provided between the first ring body 31 and the second ring body 32, and can greatly improve the rated overturning moment of the slewing bearing 3. On the basis, the sleeve 4 is connected with the first ring body 31 and is in rotating fit with the box body 1 through the slewing bearing 3, and the sleeve can still keep stable after being subjected to overturning force.

Because the sleeve 4 is only connected with the first ring body 31, a bearing structure is not arranged between the sleeve 4 and the box body 1, the structure of the transmission case is simplified, and the cost is reduced. In addition, when the sleeve 4 is machined, only the matching precision of the sleeve 4 and the slewing bearing 3 needs to be ensured, the machining difficulty of the transmission case is greatly reduced, and the cost can be reduced.

Example 2

Referring to fig. 2 and fig. 3, the present embodiment provides a transmission case, which is applied to a power head of a rotary drilling rig, and transmits a force output by a speed reducer of the power head to a drill rod. The transmission case comprises a case body 1, an input shaft 2, a slewing bearing 3 and a sleeve 4. Wherein, box 1 is as bearing structure, and input shaft 2 and slewing bearing 3 are all installed on box 1, and sleeve 4 then links to each other with box 1 through slewing bearing 3 indirectly.

The box body 1 is provided with two mounting holes for the input shaft 2 and the sleeve 4 to pass through respectively, the slewing bearing 3 is arranged inside the box body 1, and the through hole in the middle of the slewing bearing 3 is aligned with the mounting hole where the sleeve 4 is located.

The input shaft 2 is coaxially arranged with the mounting hole where the input shaft is located, and the top end of the input shaft 2 is connected with an output shaft of a speed reducer in the power head through structures such as a coupler, a spline sleeve or a flange.

Considering the structure of the output shaft of the reducer with a bearing, the input shaft 2 is provided with only one bearing as the connecting piece 21 and is rotatably connected with the box 1 through the bearing.

The bearing sets up in 2 bottoms of input shaft, and the bearing structure of the output shaft lower extreme of cooperation speed reducer is from taking makes input shaft 2 remain stable at rotatory in-process.

Because the input shaft 2 is connected with the box body 1 only through one bearing, the structure of the transmission box is simplified, and the production cost of the transmission box is reduced. In addition, only the coaxiality of the input shaft 2 and one bearing needs to be ensured when the input shaft 2 is machined, the requirement on machining precision is low, and the machining cost is reduced.

The slewing bearing 3 comprises a first ring body 31 and a second ring body 32, the first ring body 31 is in transmission fit with the input shaft 2, and the second ring body 32 is fixedly connected with the box body 1 through bolts. In addition, the first ring body 31 surrounds the outer side of the second ring body 32, is arranged coaxially with the second ring body 32, and is rotatably matched with the second ring body 32.

Specifically, the middle of the input shaft 2 is provided with a driving gear through key connection, welding or integrated molding, and the outer side wall of the first ring body 31 is integrally formed with outer teeth, and the outer teeth are engaged with the driving gear.

When the reduction gear drives the input shaft 2 to rotate, the input shaft 2 transmits power to the first ring body 31 via the drive gear and the external teeth, and the first ring body 31 rotates around the second ring body 32.

The sleeve 4 is sleeved with a flange 41, and the flange 41 and the sleeve 4 are arranged coaxially and are welded and fixed on the outer side wall of the sleeve 4. Further, the outer edge of the flange 41 is attached to the lower surface of the first ring body 31, and is fixed to the first ring body 31 by bolts, thereby fixedly connecting the sleeve 4 to the first ring body 31.

When the first ring 31 rotates around the second ring 32, the sleeve 4 rotates therewith, thereby driving the drill rod to complete the drilling operation.

The sleeve 4 is connected with the first ring body 31 only through the flange 41 and is indirectly connected with the box body 1 in a rotating way, and other bearing structures are not arranged between the sleeve 4 and the box body 1, so that the structure of the transmission case is simplified, and the cost is reduced. In addition, when the sleeve 4 is machined, only the matching precision of the sleeve 4 and the slewing bearing 3 needs to be ensured, the machining difficulty is greatly reduced, and the cost can be reduced.

Since the drill rod is subjected to irregular radial pressure during drilling, the radial pressure is transmitted to the sleeve 4 and then further transmitted to the first ring body 31, so that the drill rod, the sleeve 4 and the first ring body 31 have a tendency to swing relative to the axis of the drill rod, which is not favorable for stable drilling of the drill rod.

To solve this problem, it is necessary to enhance the anti-overturning capability of the drill rod and the sleeve 4. Since the sleeve 4 is supported only by the first ring 31, the rated overturning moment of the slewing bearing 3 needs to be increased.

Based on this, two first annular grooves 311 are opened on the inner side wall of the first ring body 31, and two second annular grooves 321 are opened on the outer side wall of the second ring body 32.

The first annular grooves 311 are disposed along the circumferential direction of the first ring body 31, the two first annular grooves 311 are arranged along the axial direction of the first ring body 31, and the two second annular grooves 321 are aligned with the two first annular grooves 311, respectively.

A plurality of balls 331 are fitted into the first annular groove 311 and the second annular groove 321, and the balls 331 in the upper and lower rows form the anti-overturning member 33, thereby stably connecting the first ring body 31 and the second ring body 32.

Specifically, the first annular groove 311 has an arcuate cross section. The radius of the arch is equal to the radius of the ball 331 and the central angle of the arch is slightly less than 180 deg.. The ball 331 is partially embedded in the first annular groove 311, the center of the ball 331 coincides with the center of the arc, and the surface of the ball 331 is attached to the inner wall of the first annular groove 311.

The second annular groove 321 is similarly arcuate in cross section and symmetrical to the first annular groove 311 in cross section about the center of the ball 331. The ball 331 is partially embedded in the second annular groove 321, and the surface of the ball 331 is attached to the inner wall of the second annular groove 321.

Due to the existence of the balls 331, the relative position of the first ring body 31 and the second ring body 32 is not easy to change, and the coaxiality is high. In addition, when the first ring body 31 rotates around the second ring body 32, rolling friction exists between the first ring body and the second ring body, so that resistance is small, and extra energy loss is small.

In order to further reduce the friction force between the first ring body 31 and the second ring body 32, oil holes are further provided in the first ring body 31 or the second ring body 32. The oil holes communicate with the first annular groove 311 and the second annular groove 321, and grease can be injected into the first annular groove 311 and the second annular groove 321 through the oil holes.

In another embodiment of the present application, the groove bottoms of the first annular groove 311 and the second annular groove 321 are recessed to form a groove for storing grease.

The embodiment also provides a power head applied to the rotary drilling rig, which comprises the transmission case and the speed reducer. The output shaft of the speed reducer is connected with the input shaft 2 of the transmission case.

The embodiment also provides a rotary drilling rig which comprises the power head.

Example 3

Referring to fig. 4, the difference from embodiment 2 is that the first ring body 31, the second ring body 32 and the anti-overturning member 33 have different structures.

Specifically, a third annular groove 312 is opened on the inner side wall of the first ring body 31, and the third annular groove 312 is arranged along the circumferential direction of the first ring body 31. Correspondingly, an annular lug 322 is integrally formed on the outer side wall of the second ring body 32, and the annular lug 322 is arranged along the circumferential direction of the second ring body 32. The annular projection 322 is located within the third annular groove 312 without contacting the inner wall of the third annular groove 312.

A plurality of first rollers 332 are respectively disposed between the annular protrusion 322 and two side walls of the third annular groove 312, and each of the first rollers 332 is disposed along a radial line direction of the first ring body 31 and arranged along a circumferential direction of the first ring body 31. In addition, a plurality of second rollers 334 are disposed between the annular protrusion 322 and the groove bottom of the third annular groove 312, an axis of each second roller 334 is parallel to an axis of the first ring body 31, and each second roller 334 is arranged along a circumferential direction of the first ring body 31.

The upper and lower rows of first rollers 332 and the middle second roller 334 form the anti-overturning part 33, so that the relative positions of the first ring body 31 and the second ring body 32 are not easy to change, and the first ring body 31 and the second ring body 32 have high coaxiality. In addition, when the first ring body 31 rotates around the second ring body 32, rolling friction exists between the first ring body and the second ring body, so that resistance is small, and extra energy loss is small.

Since the pressure between the first ring body 31 and the second ring body 32 along the axial direction is transmitted by the two rows of the first rollers 332, in order to uniformly stress each first roller 332 and prolong the service life of the first roller 332, the first rollers 332 need to be uniformly distributed along the circumferential direction of the first ring body 31.

Accordingly, the cages 333 are provided between the annular projection 322 and both side walls of the third annular groove 312, and the first rollers 332 are fitted into pockets of the cages 333. The first rollers 332 are uniformly distributed in the circumferential direction of the first ring body 31 at all times under the restriction of the cage 333.

Since the radial pressure between the first ring body 31 and the second ring body 32 is transmitted by the second rollers 334, in order to uniformly stress each second roller 334 and prolong the service life of the second roller 334, the second rollers 334 need to be uniformly distributed along the circumferential direction of the first ring body 31.

Based on this, a plurality of accommodating grooves 313 are opened at the groove bottom of the third annular groove 312. The number of the receiving grooves 313 is the same as that of the second rollers 334, and the respective receiving grooves 313 are uniformly distributed in the circumferential direction of the first ring body 31. The second rollers 334 are embedded in the corresponding receiving grooves 313 and are uniformly distributed along the axis of the first ring body 31.

In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.

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

The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and specific, but not intended to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A transmission case, characterized in that, is applied to the unit head, the transmission case includes:

a box body;

and the sleeve is connected with the first ring body.

2. The transmission case according to claim 1, wherein two first annular grooves are formed in the wall of the first ring body facing the second ring body, the two first annular grooves are arranged along the axial direction of the first ring body, two second annular grooves are correspondingly formed in the wall of the second ring body facing the first ring body, and the anti-overturning member comprises a plurality of balls embedded in the first annular grooves and the second annular grooves.

3. The transmission case according to claim 1, wherein a third annular groove is formed in a wall of the first ring body facing the second ring body, an annular projection is formed in a wall of the second ring body facing the first ring body, the annular projection is located in the third annular groove, and the anti-overturning member includes a plurality of first rollers disposed between the annular projection and two side walls of the third annular groove, the first rollers being disposed along a radial line direction of the first ring body.

4. The transmission case according to claim 3, wherein a retainer is provided between the annular protrusion and two side walls of the third annular groove, and the retainer enables the first rollers to be uniformly distributed all along the circumferential direction of the first ring body.

5. The transmission case of claim 3, wherein the anti-toppling member further comprises a plurality of second rollers disposed between the annular protrusion and the bottom of the third annular groove, the second rollers having axes parallel to the axis of the first ring body.

6. The transmission case according to claim 5, wherein the bottom of the third annular groove is provided with a plurality of accommodating grooves corresponding to the second rollers, the accommodating grooves are uniformly distributed along the circumferential direction of the second ring body, and the second rollers are embedded in the corresponding accommodating grooves.

7. A gear box according to claim 1 wherein the connection is a bearing.

8. The transmission case according to claim 1, wherein the first ring body and the input shaft are in tooth transmission, and the first ring body is integrally formed with external teeth.

9. A power head applied to a rotary drilling rig is characterized by comprising a transmission case and a speed reducer according to any one of claims 1-8, wherein the input shaft is connected with the speed reducer.

10. A rotary drilling rig comprising a power head as claimed in claim 9.