CN117704038A - Vertical heavy-load oil-tight gearbox - Google Patents

Abstract

The invention relates to the related field of gear transmission devices, in particular to a vertical heavy-duty oil-tight gearbox which comprises a box body, an input rotating shaft, an output rotating shaft, two first reinforced bearings, a sealing mechanism and a limiting mechanism, wherein the sealing mechanism comprises a sealing cap, a sealing ring and a film pressure sensor, and the limiting mechanism comprises a driving piece, a second reinforced bearing, two clamping blocks, an elastic connecting piece and a semi-ring sleeve. After the output rotating shaft swings radially to a certain extent, the sealing ring of the sealing mechanism can effectively seal the gear box to prevent oil in the gear box from leaking outwards; the limiting mechanism can be matched with the film pressure sensor in the sealing mechanism, and the two clamping blocks are driven to approach each other at the first time after the output rotating shaft is deflected radially, so that the two clamping blocks rigidly clamp the two semi-ring sleeves, and the output rotating shaft is limited by the two second reinforcing bearings and then keeps rotating stably.

Description

Vertical heavy-load oil-tight gearbox

Technical Field

The invention relates to the related field of gear transmission devices, in particular to a vertical heavy-duty oil-tight gearbox.

Background

The gear box has wide application range, and has the functions of accelerating and decelerating, changing the transmission direction, changing the rotation moment, distributing power and the like. In certain use scenes that need heavy-duty drive, the output shaft of gear box needs to bear great axial stress or radial stress, receives the reaction force influence of output shaft, and the inside transmission of gear box is worn out fast easily, still can cause the radial beat phenomenon of output shaft, and then leads to the bearing that output shaft and gear box link to each other to damage, finally makes the gear box appear leaking oil phenomenon, and the mutual striking and the wearing and tearing of output shaft and the inside transmission of gear box aggravate after leaking oil, so form vicious circle, cause the quick damage of gear box easily.

Conventional gearboxes have the following disadvantages: firstly, after the output shaft is worn by the reaction force and the transmission device, the connection part of the output shaft, the bearing and the gear box is difficult to keep sealing due to the mutual wear of the bearing and the output shaft and the radial deflection of the output shaft, and the traditional gear box also has no related sealing device to realize the continuous sealing after the bearing is worn; secondly, after the output shaft of the traditional gear box is worn and deviated, no related device is arranged on the gear box to further limit the output shaft, and as time goes on, the abrasion of the internal device of the gear box is increased, so that the deviation of the output shaft and oil leakage of the gear box are easy to be increased.

Disclosure of Invention

Based on this, it is necessary to provide a vertical heavy-duty oil-tight gearbox in view of the prior art.

In order to solve the problems in the prior art, the invention adopts the following technical scheme:

the utility model provides a vertical heavy load oil-tight gearbox, including the box and set up input pivot on the box, output pivot and sealed spacing subassembly, be provided with two first enhancement bearings that are used for connecting the output pivot on the box, sealed spacing subassembly includes sealing mechanism and stop gear, output pivot both ends all are provided with sealing mechanism and stop gear, sealing mechanism includes the sealing cap that links firmly with the box and inlays the sealing ring of locating in the sealing cap, and still be provided with the thin film pressure sensor who is used for detecting the sealing ring and receive the pressure in the sealing cap, but relative rotation and keep sealed linking to each other between the inner circle of sealing ring and the output pivot, stop gear includes clamping piece and driving piece, the clamping piece has two sets of two clamping piece symmetry settings in the box both sides, two clamping pieces of every group can synchronous looks slip on the box, all be provided with the driving piece between every clamping piece, the driving piece is used for driving one of them clamping piece along the radial translation of output pivot, driving piece and thin film pressure sensor electricity are connected, the opposite ends of two clamping pieces all are provided with a plurality of evenly distributed's elastic connection piece, and every clamping piece has a plurality of second sleeve on the second sleeve is set up to the second enhancement bearing.

Preferably, the sealing cap is provided with the sealing washer with box junction, and the sealing cap is kept away from the embedded heavy groove that is used for supplying the sealing ring embedding of seting up of one end of box, and this end of sealing cap still has linked firmly the spacing cap that is used for compressing tightly the sealing ring, and film pressure sensor sets up between spacing cap and sealing ring, and the sealing ring is close to the part of sealing cap and spacing cap and all has embedded interior metal ring, and the inner circle of sealing ring still integrated into one piece has the inward flange that is used for elasticity to paste tight output pivot, still overlaps on the sealing ring to be equipped with and is used for compressing tightly the inward flange at output pivot epaxial snap ring.

Preferably, the outward protrusion in semi-ring cover middle part has the evagination structure that is used for pressing from both sides tight second enhancement bearing outer lane, and every semi-ring cover and the quantity that corresponds the elastic connection spare that sets up between the clamp block is three, and three elastic connection spare is equiangular interval around semi-ring cover axis distributes, elastic connection spare includes one end and semi-ring cover articulated urceolus, coaxial slip setting up in the urceolus inner tube and coaxial spring that sets up in the urceolus, and the both ends of spring are contradicted urceolus and inner tube respectively, have linked firmly three first engaging lug of equiangular interval distribution on the semi-ring cover, and every urceolus corresponds the end all and articulates and set up on corresponding first engaging lug, and the middle part of clamp block is inboard offered and is used for placing the middle part heavy groove of three elastic connection spare, and middle part heavy groove department has linked firmly the second engaging lug of three inner tube one-to-one, and the one end of urceolus is kept away from the urceolus articulatedly sets up on corresponding second engaging lug, and the urceolus only can rotate in the vertical face on the second engaging lug.

Preferably, two limiting frames are fixedly connected to the box body, the limiting frames correspond to the limiting mechanisms one by one, two parallel optical axes which are arranged at intervals are fixedly connected to each limiting frame, two clamping blocks are symmetrically arranged on the corresponding two optical axes in a sliding mode, and a central through hole for avoiding an output rotating shaft is formed in the middle of each limiting frame.

Preferably, the central through hole of the limiting frame is integrally provided with a convex ring part, the convex ring part is axially connected with a rotating block, two ends of the rotating block are respectively hinged with connecting rods, each clamping block is fixedly connected with a connecting shaft, and opposite ends of the two connecting rods are respectively hinged with the two connecting shafts.

Preferably, the driving piece is an electric push rod fixedly connected with the corresponding limiting frame, the output end of the electric push rod is fixedly connected with one of the clamping blocks, and the translation direction of the output end of the electric push rod is parallel to the axis corresponding to the optical axis.

Preferably, the first reinforced bearing and the second reinforced bearing are tapered roller bearings.

Preferably, both ends of each half collar are uniformly formed with reinforcing ribs for ensuring rigidity thereof.

Compared with the prior art, the invention has the following beneficial effects:

the sealing mechanism is arranged to strengthen the sealing of the joint of the gear box and the output rotating shaft, so that the sealing ring of the sealing mechanism can effectively seal the gear box after the output rotating shaft deflects to a certain radial direction, and oil in the gear box is prevented from leaking outwards.

Secondly, after the two clamping blocks in the limiting mechanism are matched with the semi-ring sleeve through the plurality of elastic connecting pieces, the fixing of the second reinforcing bearing at the position on the output rotating shaft can be still kept when the output rotating shaft deflects in a certain radial direction, and the elastic force of the elastic connecting pieces can ensure that the second reinforcing bearing cannot be damaged along with the deflection of the output rotating shaft.

Thirdly, the limiting mechanism can be matched with the film pressure sensor in the sealing mechanism, and the two clamping blocks are driven to approach each other at the first time after the output rotating shaft is deflected radially, so that the two clamping blocks rigidly clamp the two semi-ring sleeves, and the output rotating shaft is limited by the two second reinforcing bearings and then keeps rotating stably.

Drawings

Fig. 1 is a schematic perspective view of an embodiment.

Fig. 2 is a schematic plan view of the case of the embodiment.

Fig. 3 is a cross-sectional view taken along line A-A of fig. 2.

Fig. 4 is an enlarged view of a partial structure at B in fig. 3.

Fig. 5 is an enlarged view of a partial structure at C in fig. 4.

Fig. 6 is an exploded view of a three-dimensional structure of the case and the stopper mechanism of the embodiment.

Fig. 7 is a schematic perspective view of a limiting mechanism according to an embodiment.

Fig. 8 is an exploded perspective view of the stopper mechanism of the embodiment.

Fig. 9 is an enlarged view of a partial structure at D in fig. 8.

Fig. 10 is an exploded perspective view of the stopper and the rotating block of the embodiment.

The reference numerals in the figures are: 1. a case; 2. an input rotating shaft; 3. an output shaft; 4. sealing and limiting components; 5. a sealing mechanism; 6. reinforcing ribs; 7. a sealing cap; 8. a seal ring; 9. a clamping block; 10. a semi-ring sleeve; 11. a second reinforcing bearing; 12. a limit cap; 13. an inner metal ring; 14. an inner flange; 15. a clasp; 16. an outer cylinder; 17. an inner cylinder; 18. a spring; 19. a first connection lug; 20. a second connecting ear; 21. a limiting frame; 22. an optical axis; 23. a central through hole; 24. a convex ring portion; 25. a rotating block; 26. a connecting rod; 27. a connecting shaft; 28. an electric push rod.

Detailed Description

The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.

Referring to a vertical heavy-duty oil-tight gearbox shown in fig. 1-10, including box 1 and set up input pivot 2 on box 1, output pivot 3 and seal spacing subassembly 4, be provided with two first enhancement bearings that are used for connecting output pivot 3 on box 1, seal spacing subassembly 4 includes sealing mechanism 5 and stop gear, output pivot 3 both ends all are provided with sealing mechanism 5 and stop gear, sealing mechanism 5 includes the sealing cap 7 that links firmly with box 1 and inlays the sealing ring 8 of locating in sealing cap 7, and still be provided with the film pressure sensor who is used for detecting sealing ring 8 and receives the pressure in the sealing cap 7, but relative rotation just keeps sealing to link to each other between inner circle and the output pivot 3 of sealing ring 8, stop gear includes clamping block 9 and driving piece, clamping block 9 has two sets of symmetry settings in box 1 both sides, two clamping block 9 symmetry settings in output pivot 3's both sides, two clamping block 9 of every group can slide in step on box 1 in step, all be provided with the driving piece between the clamping block 9 of every group, driving piece is used for driving clamping block 9 radially to connect with two ring seal sleeve rings 11 along the radial direction of the clamping piece, two sets of clamping piece sets of sealing ring 11 are connected with two ring rings 11, still have two ring sleeve rings 11 to be provided with two ring seal sleeve 11, two sets of elastic sleeve 11 are connected with two ring bearing sets.

The two sealing mechanisms 5 have the same structure, the two limiting mechanisms have the same structure, the first reinforced bearing and the second reinforced bearing 11 can bear larger axial load and radial load, the first reinforced bearing and the second reinforced bearing 11 can also adopt a plurality of bearing combinations to realize the aim of bearing larger axial load and radial load, when the two clamping blocks 9 are not driven by a driving piece to approach each other, the two clamping blocks 9 elastically press the two half-ring sleeves 10 on the second reinforced bearing 11 through a plurality of elastic connecting pieces, so that the second reinforced bearing 11 is limited on the output rotating shaft 3, and even if the output rotating shaft 3 swings radially, the second reinforced bearing 11, the two half-ring sleeves 10 and the two clamping blocks 9 are not separated from each other under the elastic buffering of the plurality of elastic connecting pieces, the gear box is also provided with an alarm and a controller electrically connected with the alarm, the film pressure sensor and the driving part, when the output rotating shaft 3 bears stronger reaction force to generate abrasion with the internal parts of the gear box, and further the first reinforcing bearing is damaged to cause oil leakage of the gear box, oil leaked from the gear box flows into the sealing cap 7 from the joint of the gear box and the output rotating shaft 3 and generates corresponding pressure to the sealing ring 8, the film pressure sensor between the sealing ring 8 and the sealing cap 7 detects the pressure and sends a signal to the controller, the controller sends the signal to the driving part and the alarm after receiving the signal of the controller, the driving part receives the signal of the controller and then drives the corresponding clamping block 9 to be close to the other clamping block 9, the two clamping blocks 9 synchronously and oppositely approach each other and finally rigidly abut against the two half-ring sleeves 10, so that the second reinforcing bearing 11 is rigidly clamped and fixed through the two half-ring sleeves 10, so to take place radial wobbling output pivot 3 and make further spacing, guarantee output pivot 3's stable rotation, send the warning after the alarm received the signal simultaneously, inform the staff to prepare the maintenance work.

In order to connect the sealing cap 7, the sealing ring 8 and the output shaft 3, the following features are specifically provided:

the sealing cap 7 is provided with the sealing washer with box 1 junction, the one end that sealing cap 7 kept away from box 1 has been offered and has been used for supplying sealing ring 8 embedded sunk groove, this end of sealing cap 7 has still been linked firmly and is used for compressing tightly spacing cap 12 of sealing ring 8, film pressure sensor sets up between spacing cap 12 and sealing ring 8, the sealing ring 8 is close to sealing cap 7 and spacing cap 12 the part all has embedded inner metal ring 13, and the inner circle of sealing ring 8 still integrated into one piece has the inward flange 14 that is used for elasticity to paste tight output pivot 3, still the cover is equipped with the snap ring 15 that is used for compressing tightly inward flange 14 on output pivot 3 on the sealing ring 8.

The sealing ring 8 is made of wear-resistant rubber, the inner metal ring 13 is wrapped by the sealing ring 8, the elastic effect of the sealing ring 8 is supported and maintained, the sealing ring 8 can be tightly adhered to the sealing cap 7 and the limiting cap 12, the sealing ring 8 has certain elasticity, and the inner flange 14 on the sealing ring 8 can be abutted against the output rotating shaft 3 by matching with the clamping ring 15 capable of elastically shrinking inwards.

In order to connect the half-ring sleeve 10, the corresponding clamping block 9 and the corresponding plurality of elastic connecting pieces, the following features are specifically provided:

the middle part of the semi-ring sleeve 10 is outwards protruded with a convex structure for clamping the outer ring of the second reinforced bearing 11, the number of elastic connecting pieces arranged between each semi-ring sleeve 10 and the corresponding clamping block 9 is three, the three elastic connecting pieces are distributed at equal angle intervals around the axis of the semi-ring sleeve 10, each elastic connecting piece comprises an outer cylinder 16 with one end hinged with the semi-ring sleeve 10, an inner cylinder 17 coaxially sliding in the outer cylinder 16 and a spring 18 coaxially arranged in the outer cylinder 16, two ends of the spring 18 respectively abut against the outer cylinder 16 and the inner cylinder 17, the semi-ring sleeve 10 is fixedly connected with three first connecting lugs 19 at equal angle intervals, the corresponding end of each outer cylinder 16 is hinged on the corresponding first connecting lug 19, the middle inner side of the clamping block 9 is provided with a middle sunk groove for placing the three elastic connecting pieces, the middle sunk groove is fixedly connected with the second connecting lugs 20 corresponding to the three inner cylinders 17 one by one, one end of the inner cylinder 17 far away from the outer cylinder 16 is hinged on the corresponding second connecting lugs 20, the outer cylinder 16 can only rotate in a vertical plane on the first connecting lugs 19, and the inner cylinder 17 can only rotate in a horizontal plane on the second connecting lugs 20.

The urceolus 16, inner tube 17 and spring 18 constitute telescopic tube structure, so leave the condition of certain clearance between clamp block 9 and semi-ring cover 10, with clamp block 9 articulated inner tube 17 through spring 18's effect, make urceolus 16 have the elastic force with semi-ring cover 10 support to second enhancement bearing 11, thereby guarantee that two clamp blocks 9 can flexible clamp two semi-ring covers 10 all the time, and urceolus 16 can only rotate in the vertical face on first engaging lug 19, inner tube 17 can only rotate in the horizontal plane on second engaging lug 20, when making output pivot 3 do arbitrary direction swing in the space, first engaging lug 19 can follow output pivot 3 and remove, the elastic connection piece can be all the time between semi-ring cover 10 and clamp block 9 self-adaptation rotation, guarantee that semi-ring cover 10 and clamp block 9 remain elastic connection all the time, even if output pivot 3 has produced certain radial swing, because two clamp blocks 9 are flexible clamp two semi-ring covers 10 all the time, can guarantee that two clamp blocks 9 are to two clamp 10's elastic clamp, thereby guarantee that two clamp blocks 9 can be in two clamp the semi-ring cover 10 respectively to the semi-ring cover 10 respectively, thereby guarantee that two clamp blocks 10 can be close to two clamp corresponding semi-ring cover 10 clamp the corresponding semi-ring cover 10 position and two clamp the corresponding semi-ring cover 10 clamp the middle part groove 10 can not be close to each other, thereby the middle part clamp the middle part groove is located at two clamp block 10, the corresponding clamp block 10, the middle part is difficult clamp the middle part groove is guaranteed to the middle part 10, the clamp the corresponding to the semi-ring cover 10, the clamp piece is reached to the middle part is down, and the clamp piece is difficult to the clamp down to the clamp the semi-ring cover 10, and can down has been guaranteed.

In order to connect the case 1 with the two clamping blocks 9, the following features are provided in particular:

two spacing frames 21 have been linked firmly on the box 1, spacing frame 21 and stop gear one-to-one, and have all linked firmly two parallel interval setting's optical axis 22 on every spacing frame 21, two clamp blocks 9 are the symmetry state slip setting on corresponding two optical axes 22, and the central through-hole 23 that is used for dodging output pivot 3 has all been seted up at the middle part of every spacing frame 21.

When the output rotating shaft 3 does not radially deflect, the optical axis 22 is perpendicular to the output rotating shaft 3, after the two optical axes 22 limit the two clamping blocks 9, the two clamping blocks 9 are guaranteed to translate only in the axial direction perpendicular to the output rotating shaft 3, so that after the two subsequent clamping blocks 9 are close to each other and rigidly clamp the output rotating shaft 3 through the two semi-ring sleeves 10, the two second reinforcing bearings 11 can be respectively clamped and fixed by the corresponding two semi-ring sleeves 10, the output rotating shaft 3 is limited, stable rotation of the output rotating shaft 3 is guaranteed, one end of the output rotating shaft 3 penetrates through the central through hole 23 corresponding to the limiting frame 21 and protrudes out of the limiting frame 21, and the end of the output rotating shaft 3 is used for power output.

In order to ensure that the two clamping blocks 9 can move synchronously towards each other, the following features are provided:

the central through hole 23 department integrated into one piece of locating rack 21 has bulge loop portion 24, and bulge loop portion 24 upper shaft joint is provided with rotary block 25, and the both sides that rotary block 25 are relative all articulated to be provided with connecting rod 26, has all linked firmly connecting axle 27 on every clamping block 9, and the opposite ends of two connecting rods 26 articulate respectively and set up on two connecting axles 27.

The middle part of the rotating block 25 is sleeved on the convex ring part 24 after being perforated, so that the rotating block 25 is axially arranged on the convex ring part 24 while avoiding the output rotating shaft 3, two ends of the connecting rod 26 are respectively hinged with the rotating block 25 and the corresponding clamping blocks 9, so that under the limit of the two optical axes 22 to the two clamping blocks 9, after the corresponding clamping blocks 9 are driven to translate by the driving piece, the corresponding rotating block 25 is driven to rotate by the corresponding connecting rod 26, after the rotating block 25 rotates, the corresponding clamping blocks 9 can be driven to synchronously translate by the other connecting rod 26, and after the connecting, the two clamping blocks 9 can only synchronously move in opposite directions or synchronously move away from each other in equal distance.

In order to drive the translation and locking of the corresponding clamping block 9 by means of the driving element, the following features are provided in particular:

the driving piece is an electric push rod 28 fixedly connected with the corresponding limiting frame 21, the output end of the electric push rod 28 is fixedly connected with one of the clamping blocks 9, and the translation direction of the output end of the electric push rod 28 is parallel to the axis corresponding to the optical axis 22.

The electric push rod 28 has the characteristics of large thrust, stable and slow speed, self-locking and the like, one clamping block 9 is pushed to translate through the electric push rod 28, and the two clamping blocks 9 move in opposite directions under the driving of the rotating block 25, the two connecting rods 26 and the two connecting shafts 27, so that the two clamping blocks 9 gradually clamp the two semi-ring sleeves 10 in a hard mode, stable limiting can be carried out on the output rotating shaft 3 through the two second reinforcing bearings 11, and the self-locking capability of the electric push rod 28 can ensure that the two clamping blocks 9 are static and motionless when the electric push rod 28 does not act, so that the output rotating shaft 3 is always limited. Since the electric push rod 28 is extended and contracted at the output end by screw driving, the electric push rod has the characteristic of reverse self-locking.

In order to ensure the bearing capacity of the first and second reinforcing bearings 11 to the axial and radial stresses of the output shaft 3, the following features are provided in particular:

the first and second reinforcing bearings 11 are tapered roller bearings.

The tapered roller bearing has the characteristic of bearing larger radial load and axial load simultaneously, so the tapered roller bearing is adopted to limit the output rotating shaft 3, and the effective service life of the gear box is ensured.

In order to ensure the rigidity of the half collar 10, the following features are specifically provided:

the both ends of each half collar 10 are integrally formed with reinforcing ribs 6 for securing rigidity thereof.

The setting of strengthening rib 6 is used for effectively guaranteeing the rigidity of semi-ring cover 10, guarantees that two clamping blocks 9 support and can effectively press from both sides tight second strengthening bearing 11 behind two semi-ring covers 10.

Working principle: when the two clamping blocks 9 are not driven by the driving piece and are close to each other, the two clamping blocks 9 elastically press the two half-ring sleeves 10 against the second reinforcing bearing 11 through the plurality of elastic connecting pieces, so that the second reinforcing bearing 11 is limited on the output rotating shaft 3, and even if the output rotating shaft 3 swings radially, the second reinforcing bearing 11, the two half-ring sleeves 10 and the two clamping blocks 9 are not separated from each other under the elastic buffering of the plurality of elastic connecting pieces; when the output rotating shaft 3 bears stronger reaction force to wear with the gear box, and then the first reinforcing bearing is damaged and the gear box leaks oil, oil leaked from the gear box flows into the sealing cap 7 from the joint of the gear box and the output rotating shaft 3, corresponding pressure is generated on the sealing ring 8, a film pressure sensor between the sealing ring 8 and the sealing cap 7 detects the pressure and sends a signal to the controller, the controller receives the signal and then sends the signal to the driving piece and the alarm, the driving piece receives the signal of the controller and then drives the corresponding clamping block 9 to be close to the other clamping block 9, the two clamping blocks 9 synchronously approach each other and finally rigidly abut against the two semi-ring sleeves 10, and therefore the second reinforcing bearing 11 is rigidly clamped and fixed through the two semi-ring sleeves 10, further limit is formed on the output rotating shaft 3 with radial swing, stable rotation of the output rotating shaft 3 is guaranteed, and the alarm is sent after the signal is received, and a worker is informed to prepare for maintenance work.

The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.

Claims (8)

1. The utility model provides a vertical heavy load oil leakage-free gear box which is characterized in that, including box (1) and input pivot (2) that sets up on box (1), output pivot (3) and sealed spacing subassembly (4), be provided with two first enhancement bearings that are used for connecting output pivot (3) on box (1), sealed spacing subassembly (4) include sealing mechanism (5) and stop gear, output pivot (3) both ends all are provided with sealing mechanism (5) and stop gear, sealing mechanism (5) include with box (1) seal cap (7) that link firmly and inlay sealing ring (8) of locating in seal cap (7), and still be provided with the film pressure sensor that is used for detecting the pressure that sealing ring (8) received in seal cap (7), but the inner circle of sealing ring (8) and output pivot (3) relative rotation keep sealed the linking to each other, stop gear includes clamp block (9) and driving piece, clamp block (9) have two sets of symmetry in box (1) both sides, two clamp block (9) of every group are symmetrical to be provided with in output pivot (3) both sides, clamp block (9) are used for driving piece (9) between two sets of synchronous drive piece (1) in the radial direction each other, it can be used for the synchronous to drive piece (9) to slide, the driving piece is electrically connected with the film pressure sensor, the opposite ends of the two clamping blocks (9) are provided with a plurality of elastic connecting pieces which are uniformly distributed, a plurality of elastic connecting pieces on each clamping block (9) are further provided with a half ring sleeve (10), the inner rings of the two half ring sleeves (10) are clamped and provided with second reinforcing bearings (11), and the inner rings of the second reinforcing bearings (11) are coaxially sleeved on the output rotating shaft (3).

2. The vertical heavy-duty oil-tight gear box according to claim 1, characterized in that a sealing ring is arranged at the joint of the sealing cap (7) and the box body (1), an embedded sinking groove for embedding the sealing ring (8) is formed at one end of the sealing cap (7) away from the box body (1), a limiting cap (12) for compressing the sealing ring (8) is fixedly connected to the end of the sealing cap (7), a film pressure sensor is arranged between the limiting cap (12) and the sealing ring (8), inner metal rings (13) are embedded in the parts, close to the sealing cap (7) and the limiting cap (12), of the sealing ring (8), an inner flange (14) for elastically tightly attaching to the output rotating shaft (3) is integrally formed on the inner ring of the sealing ring (8), and a clamping ring (15) for compressing the inner flange (14) on the output rotating shaft (3) is sleeved on the sealing ring (8).

3. The vertical heavy-duty oil-tight gear box according to claim 1, wherein the middle part of the half-ring sleeve (10) is outwards protruded with a convex structure for clamping the outer ring of the second reinforcing bearing (11), the number of elastic connecting pieces arranged between each half-ring sleeve (10) and the corresponding clamping block (9) is three, the three elastic connecting pieces are distributed at equal angle intervals around the axis of the half-ring sleeve (10), the elastic connecting pieces comprise an outer cylinder (16) with one end hinged with the half-ring sleeve (10), an inner cylinder (17) coaxially and slidably arranged in the outer cylinder (16) and a spring (18) coaxially arranged in the outer cylinder (16), two ends of the spring (18) respectively abut against the outer cylinder (16) and the inner cylinder (17), the half-ring sleeve (10) is fixedly connected with three first connecting lugs (19) distributed at equal angle intervals, the corresponding ends of each outer cylinder (16) are hinged on the corresponding first connecting lugs (19), the middle inner side of the clamping block (9) is provided with a middle sunk groove for placing the three elastic connecting pieces, the middle sunk groove is fixedly connected with the three corresponding lugs (17) on the first connecting lugs (20) which are arranged on the first connecting lugs (20) which are correspondingly arranged on the second connecting lugs (20) which are arranged on the first connecting lugs (20) which are far away from the first connecting lugs (20), the inner cylinder (17) can only rotate in the horizontal plane on the second connecting lug (20).

4. The vertical heavy-duty oil-leakage-free gear box according to claim 1, characterized in that two limiting frames (21) are fixedly connected to the box body (1), the limiting frames (21) are in one-to-one correspondence with the limiting mechanisms, two parallel optical axes (22) which are arranged at intervals are fixedly connected to each limiting frame (21), two clamping blocks (9) are symmetrically arranged on the corresponding two optical axes (22) in a sliding mode, and a central through hole (23) for avoiding an output rotating shaft (3) is formed in the middle of each limiting frame (21).

5. The vertical heavy-duty oil-tight gear box according to claim 4, wherein a convex ring part (24) is integrally formed at a central through hole (23) of the limiting frame (21), a rotating block (25) is arranged on the convex ring part (24) in a shaft connection mode, connecting rods (26) are arranged at two ends of the rotating block (25) in a hinge mode, connecting shafts (27) are fixedly connected to each clamping block (9), and opposite ends of the two connecting rods (26) are respectively arranged on the two connecting shafts (27) in a hinge mode.

6. The vertical heavy-duty oil-tight gear box according to claim 4, wherein the driving piece is an electric push rod (28) fixedly connected with the corresponding limiting frame (21), the output end of the electric push rod (28) is fixedly connected with one of the clamping blocks (9), and the translation direction of the output end of the electric push rod (28) is parallel to the axis of the corresponding optical axis (22).

7. A vertical heavy-duty oil-tight gearbox according to claim 1, characterised in that the first and second reinforcement bearings (11) are tapered roller bearings.

8. A vertical heavy-duty oil-tight gearbox according to claim 1, characterized in that the two ends of each half collar (10) are integrally formed with reinforcing ribs (6) for ensuring the rigidity thereof.