CN111288091A

CN111288091A - Hub connecting assembly, coupling and hub connecting assembly

Info

Publication number: CN111288091A
Application number: CN202010221532.3A
Authority: CN
Inventors: 高冠华
Original assignee: Datong Bashika Machinery Manufacturing Co ltd
Current assignee: Datong Bashika Machinery Manufacturing Co ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-06-16

Abstract

The invention relates to a hub connecting assembly, a coupler and a hub connecting assembly. Wherein, hub coupling assembling includes: a first sleeve; the second sleeve is arranged in the first sleeve and provided with a first accommodating part, and the first accommodating part is configured to be matched with a second accommodating part arranged on a shaft penetrating through the second sleeve so as to accommodate the key; the oil storage cavity is arranged between the second sleeve and the first sleeve; the first sleeve is provided with an oil channel communicated with the oil storage cavity, the oil channel is configured to allow hydraulic oil to enter the oil storage cavity, and the second sleeve is configured to deform towards the central axis direction of the second sleeve under the action of the injected hydraulic oil so as to press the shaft. The connection between the second sleeve and the shaft is realized through hydraulic tensioning, and the second sleeve and the shaft do not need to be hot-assembled, so that the installation is convenient; and still through key-type connection second sleeve and axle, avoid under unusual operating mode, take place relative slip between the faying face of second sleeve and axle, and then avoid causing damages to transmission parts such as sleeve and axle.

Description

Hub connecting assembly, coupling and hub connecting assembly

Technical Field

The invention relates to the technical field of couplings, in particular to a hub connecting assembly, a coupling and a hub connecting assembly.

Background

The shaft coupling is used for connecting two axles (driving shaft and driven shaft) that need transmission power, and general shaft coupling contains two wheel hub at least, and two wheel hub install respectively on driving shaft and driven shaft, connect according to the structural style of difference again between two wheel hub.

The hub to shaft connection of the associated coupling is primarily through a variety of keyed connections to transmit torque. In order to ensure the concentricity of the two connected shafts and avoid vibration, the coupling and the shafts are generally in over-fit or interference fit.

The hub and the shaft are assembled by mechanical striking or pushing of the coupling with smaller size, but the inner wall of the inner hole of the hub and the shaft are often pulled to be damaged in the assembling process, and the large coupling cannot be assembled at all by mechanical striking. The heating is needed when the installation and the disassembly are carried out, and the field construction is difficult.

Disclosure of Invention

Some embodiments of the present invention provide a hub connection assembly, a coupling, and a hub connection assembly for alleviating the problem of assembly difficulties.

Some embodiments of the present invention provide a hub connection assembly, comprising:

a first sleeve;

the second sleeve is arranged in the first sleeve and provided with a first accommodating part, and the first accommodating part is configured to be matched with a second accommodating part arranged on a shaft penetrating into the second sleeve so as to accommodate a key; and

the oil storage cavity is arranged between the second sleeve and the first sleeve;

wherein, first sleeve be equipped with the oil duct of oil storage chamber intercommunication, the oil duct is configured to supply hydraulic oil enters into the oil storage chamber, the second sleeve is configured to under the effect of the hydraulic oil of pouring into to the telescopic axis direction of second takes place deformation, in order to support the pressure the axle.

In some embodiments, the hub connection assembly further comprises a key configured to be partially disposed within the first receptacle and partially disposed outside the first receptacle to mate with the second receptacle.

In some embodiments, the first receiving portion includes a key groove formed in an inner wall of the second sleeve, the key groove includes an open side and a groove bottom opposite to the open side, a middle region of the groove bottom is protruded away from a central axis of the second sleeve relative to an edge region, and a surface of the groove bottom is a first arc-shaped surface;

the hub coupling assembling still includes the key, the key includes the second arcwall face, the second arcwall face is configured to be located in the first container portion, and with first arcwall face looks adaptation, looks butt.

In some embodiments, the first receiving portion includes a key groove formed in an inner wall of the second sleeve, the key groove includes an open side, a groove bottom opposite to the open side, and a circumferential side wall formed between the open side and the groove bottom, and a portion where the circumferential side wall meets the groove bottom is provided with a first groove recessed toward a solid side of the second sleeve.

In some embodiments, the key is provided with an oil inlet hole and an oil outlet groove, the oil outlet groove is formed in a surface of the key, which is abutted against the first accommodating part, and the oil outlet groove is communicated with the oil inlet hole.

In some embodiments, the second sleeve includes a first protruding portion, the first protruding portion extends from an outer wall of the second sleeve to a direction away from a central axis of the second sleeve, and an inner wall of the second sleeve corresponding to a position of the first protruding portion is recessed to the direction away from the central axis of the second sleeve to form the first accommodating portion;

the inner wall of the first sleeve is provided with an accommodating groove, and the first protruding part is inserted into the accommodating groove.

In some embodiments, the surface of the first protrusion is a third arc-shaped surface, the inner surface of the receiving groove is a fourth arc-shaped surface, and the third arc-shaped surface and the fourth arc-shaped surface are matched and abutted.

In some embodiments, the outer wall of the second sleeve is provided with a second groove which is concave towards the central axis direction, and the second groove is adjacent to and connected with the first bulge;

the second groove extends along the axial direction of the second sleeve, and the second groove is arranged on two sides of the first protruding portion.

In some embodiments, a first through hole is radially formed in the wall of the second sleeve to serve as the first accommodating portion, the first accommodating portion extends in the axial direction of the second sleeve and penetrates through two axial ends of the second sleeve, second protruding portions protruding from the outer wall of the second sleeve in the direction of the first sleeve are arranged on two sides of the first accommodating portion, and the second protruding portions are connected with the first sleeve in a sealing mode.

In some embodiments, the hub connection assembly further includes a retaining member, the first sleeve being radially provided with a second through hole, the retaining member being configured to be inserted through the second through hole to abut the key in the first receiving portion.

In some embodiments, the hub connection assembly further comprises a spacer configured to be disposed on a side of the key remote from the first receptacle to be disposed within the second receptacle when the first receptacle is mated with the second receptacle; alternatively, the spacer is disposed in the first housing portion and abuts against the key.

In some embodiments, the hub connection assembly includes a baffle plate disposed in the first sleeve and at an end of the second sleeve, the baffle plate being provided with a third through hole, and a connection member configured to be inserted through the third through hole to connect the shaft.

In some embodiments, the axial hole formed in the first sleeve includes a first hole section and a second hole section, the hole diameter of the first hole section is smaller than that of the second hole section, a step surface is formed at the joint of the first hole section and the second hole section, the second sleeve is disposed in the first hole section, the baffle is disposed in the second hole section, and the baffle abuts against the step surface.

In some embodiments, the hub connection assembly includes a wireless pressure sensor disposed in the first sleeve for detecting a pressure within the oil storage chamber.

Some embodiments of the present invention provide a coupling including the hub connection assembly described above.

Some embodiments of the present invention provide a shaft-hub connection assembly comprising a first shaft, a second shaft, and a coupling as described above connecting the first shaft and the second shaft.

In some embodiments, the coupling includes two of the hub connection assemblies, the two hub connection assemblies being a first hub connection assembly and a second hub connection assembly, respectively, the first hub connection assembly being disposed on the first shaft, the second hub connection assembly being disposed on the second shaft, the first hub connection assembly connecting the second hub connection assembly.

Based on the technical scheme, the invention at least has the following beneficial effects:

in some embodiments, an oil storage cavity is arranged between the second sleeve and the first sleeve; the second sleeve deforms towards the direction of the central axis of the second sleeve under the pressure action of hydraulic oil injected into the oil storage cavity to abut against the shaft, so that the second sleeve and the shaft are installed in a clearance fit mode, the second sleeve and the shaft are connected through hydraulic tensioning, hot installation is not needed between the second sleeve and the shaft, and the installation is convenient; moreover, when the system is abnormal and causes overload, the key is connected with the second sleeve and the shaft, so that the phenomenon of relative sliding (slipping) between the joint surfaces of the second sleeve and the shaft under abnormal working conditions is avoided, and further the damage to transmission components such as the second sleeve and the shaft is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic front view of a hub connection assembly provided in accordance with some embodiments of the present invention;

FIG. 2 is a schematic sectional view A-A of FIG. 1;

FIG. 3 is a schematic view of a second sleeve provided in accordance with some embodiments of the present invention;

FIG. 4 is a schematic view of a second sleeve provided in accordance with further embodiments of the present invention;

FIG. 5 is a schematic radial cross-sectional view of a first sleeve provided in accordance with some embodiments of the present invention mated with a second sleeve having an arcuate first receiving portion;

FIG. 6 is a schematic view of a key provided in accordance with some embodiments of the present invention;

FIG. 7 is a schematic illustration of a key provided in accordance with further embodiments of the present invention;

fig. 8 is a schematic front view of a hub connection assembly provided in accordance with some embodiments of the present invention;

FIG. 9 is a schematic radial cross-sectional view of a first sleeve provided in accordance with some embodiments of the present invention mated with a second sleeve provided with a rectangular first receptacle;

FIG. 10 is an enlarged schematic view of the partial structure B of FIG. 9;

FIG. 11 is a schematic radial cross-sectional view of a first sleeve provided in accordance with some embodiments of the present invention mated with a second sleeve provided with a radially penetrating first receiver;

FIG. 12 is a schematic front view of a baffle provided in accordance with some embodiments of the present invention;

FIG. 13 is a schematic cross-sectional view C-C of FIG. 12.

The reference numbers in the drawings illustrate the following:

1-a first sleeve; 11-a holding tank; 12-a second via; 13-an oil inlet channel; 14-an oil outlet channel; 15-a first bore section; 16-a second bore section; 17-step surface;

2-a second sleeve; 21-a first housing; 22-a first groove; 23-a first boss; 24-a second groove; 25-a second boss; 26-a third boss;

3-an oil storage cavity;

a 4-bond; 41-a second arc-shaped surface; 42-oil inlet hole; 43-oil outlet groove;

5-axis;

6-a gasket;

7-a baffle plate; 71-third via.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.

As shown in fig. 1 and 2, some embodiments provide a hub connection assembly including a first sleeve 1, a second sleeve 2, and a reservoir 3.

The first sleeve 1 is formed with an axial bore that receives the second sleeve 2.

The second sleeve 2 is arranged in the first sleeve 1. The central axis of the second sleeve 2 coincides with the central axis of the first sleeve 1. The second sleeve 2 is fixedly connected with the first sleeve 1.

Alternatively, the second sleeve 1 is welded to the first sleeve 1, or the second sleeve 1 is connected to the first sleeve 1 by a connecting member and a sealing member.

The second sleeve 2 is formed with an axial hole for accommodating the shaft 5, and the inner diameter of the second sleeve 2 is larger than the outer diameter of the shaft 5 inserted in the axial hole thereof. The second sleeve 2 is in clearance fit with the shaft 5, i.e. there is a clearance between the inner wall of the second sleeve 2 and the outer surface of the shaft 5.

The second sleeve 2 is provided with a first accommodating portion 21, and the first accommodating portion 21 extends along the axial direction of the second sleeve 2 and penetrates through both axial ends of the second sleeve 2. The first receiving portion 21 is configured to cooperate with a second receiving portion provided on the shaft 5 inserted into the second sleeve 2 to receive the key 4, and the second sleeve 2 and the shaft 5 are connected by the key 4.

The oil storage chamber 3 is provided between the second sleeve 2 and the first sleeve 1. A sealed oil storage chamber 3 is formed between the second sleeve 2 and the first sleeve 1.

Alternatively, two axial ends of the second sleeve 2 and two axial ends of the first sleeve 1 are respectively and correspondingly sealed and connected to form a sealed oil storage chamber 3 between the outer wall of the second sleeve 2 and the inner wall of the first sleeve 1.

The first sleeve 1 is provided with an oil duct communicated with the oil storage cavity 3, the oil duct is configured to allow hydraulic oil to enter the oil storage cavity 3, and the second sleeve 2 is configured to deform towards the central axis direction of the second sleeve 2 under the action of the injected hydraulic oil so as to abut against the shaft 5, namely the second sleeve 2 tightly embraces the shaft 5 and is connected with the shaft 5 through friction. After the hydraulic oil in the oil storage cavity 3 is released, the second sleeve 2 is not subjected to the pressure of the hydraulic oil, the original shape is recovered, the second sleeve 2 releases the shaft 5, and the second sleeve 2 and the shaft 5 are recovered to be in clearance fit.

The hydraulic oil in the disclosure comprises flowing thin oil and lubricating grease, the lubricating grease is in a solid state or a semi-flowing state, the viscosity is high, the sealing effect is better compared with the flowing thin oil, and the volume change is small after the hydraulic oil is influenced by the ambient temperature.

An oil storage cavity 3 is arranged between the second sleeve 2 and the first sleeve 1; the second sleeve 2 deforms towards the direction of the central axis of the second sleeve 2 under the pressure action of hydraulic oil injected into the oil storage cavity 3 to press against the shaft 5, so that the second sleeve 2 and the shaft 5 can be installed in a clearance fit mode, connection of the second sleeve 2 and the shaft 5 is achieved through hydraulic tensioning, torque is transmitted between the joint surfaces of the second sleeve 2 and the shaft 5 according to friction force, hot charging is not needed between the second sleeve 2 and the shaft 5, and installation is convenient.

Moreover, except that hydraulic pressure rises between the second sleeve 2 and the axle 5 and tightly realizes being connected, still connect second sleeve 2 and axle 5 through key 4, when the system takes place unusually to cause the overload, in addition key 4 connects second sleeve 2 and axle 5, has avoided under the unusual operating mode, takes place the phenomenon of relative slip (skidding) between the faying face of second sleeve 2 and axle 5, and then avoids causing the damage to transmission parts such as second sleeve 2 and axle 5.

In some embodiments, the oil passage provided in the first sleeve 1 and communicated with the oil storage chamber 3 includes an oil inlet passage 13 and an oil outlet passage 14, hydraulic oil is injected into the oil storage chamber 3 through the oil inlet passage 13, and hydraulic oil in the oil storage chamber 3 is released through the oil outlet passage 14.

Optionally, the oil inlet channel 13 is provided with an oil inlet valve, the oil outlet channel 14 is provided with an oil outlet valve, and the oil inlet valve is connected with an oil injection device and used for injecting pressure medium into the oil storage cavity 3; the oil outlet valve is used for releasing the pressure medium in the oil storage chamber 3.

Optionally, the oil inlet channel 13 and the oil outlet channel 14 are symmetrical with respect to the central axis of the first sleeve 11 to improve the dynamic balance accuracy of the hub connection assembly.

In some embodiments, the two axial ends of the second sleeve 2 are hermetically connected with the two axial ends of the first sleeve 1, and the oil storage chamber 3 is disposed between the outer wall of the second sleeve 2 and the inner wall of the first sleeve 1 and is an annular chamber.

In some embodiments, the hub connection assembly further comprises a key 4, the key 4 being configured to be partially disposed within the first receptacle 21 and partially disposed outside the first receptacle 21 to mate with the second receptacle. In a state where the second sleeve 2 is fitted over the outer periphery of the shaft 5, the key 4 is provided in a cavity formed by the first receiving portion 21 and the second receiving portion to connect the second sleeve 2 and the shaft 5.

Second sleeve 2 is equipped with first portion 21 that holds, is equipped with the second portion of holding on the axle 5, and first portion 21 that holds key 4 with the cooperation of second portion of holding, and when the hydraulic pressure rises between second sleeve 2 and the axle 5, still there is the key-type connection, even bad operating mode such as impact, vibration appear in the shaft coupling during operation, the phenomenon of skidding also can not appear in the shaft coupling, avoids producing the damage to second sleeve 2 and axle 5.

Moreover, the second sleeve 2 and the shaft 5 are connected in a key connection mode in a hydraulic tensioning mode, and even if the hydraulic system fails when the coupler works, the problem of pressure relief occurs, the torque can still be transmitted through the key connection mode.

In some embodiments, as shown in fig. 3, 4 and 5, the first receiving portion 21 includes a key groove formed in an inner wall of the second sleeve 2, the key groove includes an open side and a groove bottom opposite to the open side, a middle region of the groove bottom is convex away from the central axis of the second sleeve 2 relative to an edge region, and a surface of the groove bottom is a first arc-shaped surface.

Alternatively, the first accommodation portion 21 (key groove) may have a circular arc-shaped radial cross section.

In some embodiments, as shown in fig. 6 and 7, the hub connection assembly further includes a key 4, the key 4 including a second arcuate surface 41, the second arcuate surface 41 configured to be disposed within the first receptacle 21 and to mate with, abut, the first arcuate surface.

Under the state that second sleeve 2 cover was established in the periphery of axle 5, key 4 was located in the cavity that first portion 21 and second portion formed, and the first position of key 4 is located first portion 21, and the second portion of key 4 is located in the second portion, and first position is located to second arcwall face 41, second arcwall face 41 and first arcwall face looks adaptation, and second arcwall face 41 and first arcwall face butt.

In some embodiments, the second arcuate surface 41 is a top surface of the key 4, a bottom surface of the key 4 is opposite the top surface, the bottom surface of the key 4 is planar, a circumferential side surface of the key 4 is located between and connects the top and bottom surfaces, and the circumferential side surface of the key 4 is perpendicular to the bottom surface of the key 4.

In some embodiments, the bottom surface of the first accommodating portion 21 is a first arc-shaped surface, and the surface of the key 4 which is matched with and abutted against the bottom surface of the first accommodating portion 21 is a second arc-shaped surface, so that the contact area between the first accommodating portion 21 and the key 4 is increased; moreover, the tank bottom surface of first portion 21 that holds is the arcwall face, is planar condition for the tank bottom, and radial height in the keyway is the same, can increase the side of key and the pressurized area of contact of keyway, and under the prerequisite that power is the same promptly, the pressurized area of the key that has the second arc face is bigger, and the compressive stress who receives reduces, and consequently, the setting of first arcwall face and second arcwall face can reduce the compressive stress to key 4, avoids key 4 to be extruded and damaged.

In some embodiments, as shown in fig. 9 and 10, the first accommodating portion 21 includes a key groove provided on an inner wall of the second sleeve 2, the key groove including an open side, a groove bottom opposite to the open side, and a circumferential side wall provided between the open side and the groove bottom, and a portion where the circumferential side wall meets the groove bottom is provided with a first groove 22 recessed toward a solid side of the second sleeve 2. Through setting up first recess 22, can make second sleeve 2 warp at first recess 22 more easily to prevent that the tank bottom from producing extrusion stress concentration because of warping with the junction of circumference lateral wall, resulting in the unable recovery of deformation of tank bottom.

The solid side of the second sleeve 2 comprises the inner wall, the outer wall and the area between the inner and outer wall of the second sleeve 2.

Optionally, the first groove 22 is recessed in a solid side of the second sleeve 2 away from the central axis of the second sleeve 2.

Optionally, the first groove 22 is recessed parallel to the central axis of the second sleeve 2 on a solid side of the second sleeve 2.

In some embodiments, the first receiving portion 21 includes a key groove formed in the inner wall of the second sleeve 2, and the bottom surface of the key groove is a flat surface.

Optionally, the keyway is rectangular in radial cross-section. The joint of the circumferential side wall of the key groove and the groove bottom is provided with a first groove 22 which is concave towards the direction of the central axis far away from the second sleeve 2.

In some embodiments, as shown in fig. 7, the key 4 is provided with an oil inlet hole 42 and an oil outlet groove 43, the oil outlet groove 43 is provided on a surface of the key 4 abutting against the first container portion 21, the oil outlet groove 43 communicates with the oil inlet hole 42, and the oil outlet groove 43 is used for guiding hydraulic oil to the first container portion 21 (a groove bottom of a key groove).

The hydraulic oil force in the oil storage cavity 3 received at the position of the first accommodating part 21 is large, and when the position of the first accommodating part 21 is subjected to large plastic deformation, the situation that the position of the first accommodating part 21 is not ideal in deformation recovery after the hydraulic oil in the oil storage cavity 3 is released exists, and the hydraulic oil is guided to the groove bottom of the first accommodating part 21 through the oil inlet hole 42 and the oil outlet groove 43 arranged on the key 4 so as to eject out the groove bottom of the first accommodating part 21, so that the position of the first accommodating part 21 is facilitated to be deformed recovery.

In some embodiments, the oil outlet groove 43 is configured as a strip-shaped hole, a cross-shaped hole, a Y-shaped hole, an X-shaped hole, or a grid-shaped hole. Alternatively, the oil outlet grooves 43 are uniformly distributed on the surface of the key 4 that abuts against the groove bottom of the first housing portion 21. The oil outlet groove 43 is used for uniformly delivering the hydraulic oil to the groove bottom of the first accommodating part 21, so as to jack up the deformed position of the first accommodating part 21 and restore the deformation.

In some embodiments, as shown in fig. 7, the oil outlet groove 43 extends in the axial direction of the key 4 and is a strip-shaped hole, and the oil outlet groove 43 is further connected with at least one oil hole extending in the radial direction of the key 4.

In some embodiments, the oil inlet 42 is provided on the end face of the key 4, and includes a threaded hole section for screwing into the threaded portion of the oil nipple to mount the oil nipple, and a counter bore section for accommodating the non-threaded portion of the oil nipple, and the axial depth of the counter bore section is greater than the length of the non-threaded portion of the oil nipple.

In some embodiments, as shown in fig. 5, the second sleeve 2 includes a first protrusion portion 23, the first protrusion portion 23 extends from an outer wall of the second sleeve 2 to a direction away from a central axis of the second sleeve 2, and an inner wall of the second sleeve 2 corresponding to a position of the first protrusion portion 23 is recessed to the direction away from the central axis of the second sleeve 2 to form the first accommodating portion 21. The first protruding portion 23 is disposed at the bottom of the first accommodating portion 21, so as to increase the thickness of the bottom of the first accommodating portion 21 and prevent the second sleeve 2 from being damaged by being pressed at the first accommodating portion 21.

In some embodiments, the inner wall of the first sleeve 1 is provided with a receiving groove 11, and the first protrusion 23 is inserted into the receiving groove 11.

The outer wall of second sleeve 2 is located to first bellying 23, and extends to the axis direction of keeping away from second sleeve 2, and the tank bottom of first portion 21 is located to first bellying 23, has increased the thickness of tank bottom, avoids second sleeve 2 to be damaged by the extrusion in first portion 21 department of holding. Furthermore, first bellying 23 is located in holding tank 11, is equivalent to further through key and keyway connection between first sleeve 1 and the second sleeve 2, can transmit the moment of torsion, reduces the requirement to the sealing connection quality between first sleeve 1 and the second sleeve 2.

In some embodiments, the first receiving portion 21 extends in the axial direction of the second sleeve 2, and the first projecting portion 23 extends in the axial direction of the second sleeve 2.

The first protruding portion 23 may be provided on the groove bottom of the rectangular first accommodating portion 21, or the first protruding portion 23 may be provided on the groove bottom of the arc-shaped first accommodating portion 21.

In some embodiments, the surface of the first protrusion 23 is a third arc-shaped surface, and the inner surface of the receiving groove 11 is a fourth arc-shaped surface, and the third arc-shaped surface is matched with and abutted against the fourth arc-shaped surface.

The surface of first bellying 23 is the third arcwall face, and the inslot surface of holding tank 11 is the fourth arcwall face, can increase the area of contact of first bellying 23 and holding tank 11, does benefit to sealing connection.

In some embodiments, the outer wall of the second sleeve 2 is provided with a second groove 24 recessed toward the central axis thereof, and the second groove 24 is adjacent to and connects the side edges of the first protruding portion 23.

The second groove 24 is adjacent to and connected with the first protruding portion 23, so that the second sleeve 2 is shrunk and deformed from the second groove 24, and the situation that the sealing connection position of the second sleeve 2 and the first sleeve 1 is torn when the second sleeve 2 is shrunk and deformed under the action of hydraulic oil in the oil storage cavity 3 is avoided, and the deformation of the sealing connection position of the second sleeve 2 and the first sleeve 1 is caused. Moreover, the second groove 24 is easier to deform, and the first accommodating part 21 is prevented from being deformed too much, so that the influence on the key 4 is reduced, and the key 4 is prevented from being extruded and damaged.

In some embodiments, the second groove 24 extends along the axial direction of the second sleeve 2, and both sides of the first protruding portion 23 are provided with the second groove 24.

In some embodiments, the two axial ends of the second sleeve 2 are respectively provided with a third protruding portion 26 protruding towards the first sleeve 1, the oil storage chamber 3 is formed in a space surrounded by the third protruding portion 26, the inner wall of the first sleeve 1 and the outer wall of the second sleeve 2, and the oil storage chamber 3 may be an annular chamber.

The outer circular surface of the second sleeve 2 comprises a first protruding part 23 extending along the axial direction of the second sleeve, the first protruding part 23 is inserted into the accommodating groove 11, the oil storage cavity 3 is partitioned by the first protruding part 23, and therefore the oil storage cavity 3 can also be a non-circular cavity, as shown in fig. 5.

In some embodiments, the first receiving portion 21 may be in the form of a key slot as described above, and correspondingly, the second receiving portion may also be in the form of a key slot. Alternatively, the first receiving portion 21 may be in the form of a through hole, and the second receiving portion may be in the form of a key groove.

In some embodiments, as shown in fig. 11, the first housing part 21 is in the form of a through hole, namely: the wall of the second sleeve 2 is provided with a first through hole along the radial direction as a first accommodating portion 21, and the first accommodating portion 21 extends along the axial direction of the second sleeve 2 and penetrates through two axial ends of the second sleeve 2.

The two sides of the first accommodating part 21 are provided with second protruding parts 25 protruding from the outer wall of the second sleeve to the direction of the first sleeve 1, and the second protruding parts 25 are connected with the first sleeve 1 in a sealing mode.

The two sides of the first accommodating part 21 are thickened to form second protruding parts 25 for being connected with the inner wall of the first sleeve 1, and the oil storage cavity 3 is partitioned at the first accommodating part 21 and is a non-circular cavity, as shown in fig. 11.

In some embodiments, the hub connection assembly further includes a limiting member, the first sleeve 1 is provided with a second through hole 12, and the limiting member is configured to be inserted into the second through hole 12 to abut against the key 4 in the first accommodating portion 21, so as to prevent the key 4 from jumping radially.

In some embodiments, the second through hole 12 is a threaded hole, the stopper includes a screw or a bolt, and the stopper is inserted into the second through hole 12 to abut against the key 4 to prevent the key 4 from jumping radially.

The third through holes 71 may coincide with the axis of the shaft 5, and may be provided in one, or two symmetrically provided with respect to the axis, or three or more third through holes may be uniformly distributed around the axis of the shaft 5, and the diameter of a circle formed by the three or more third through holes 71 is smaller than the diameter of the shaft 5, and the requirement for machining a threaded hole in the shaft 5 is satisfied.

In some embodiments, as shown in fig. 8, the hub connection assembly further includes a spacer 6, and the spacer 6 is configured to be disposed on a side of the key 4 away from the first receiving portion 21 to be disposed in the second receiving portion with the first receiving portion 21 engaged with the second receiving portion. The spacer 6 is provided on the shaft 5 at the bottom of the second housing portion and abuts the key 4.

The spacer 6 is disposed at the bottom of the second receiving portion for jacking up the key 4 to adjust the radial height of the key 4 in the second receiving portion. Since the thickness of the second sleeve 2 at the first receiving portion 21 is small, but the oil pressure applied during the pressing process is large, the deformation is large, the depth of the second receiving portion on the shaft 5 is not controlled, and the radial height of the key 4 in the second receiving portion can be adjusted by inserting the gasket 6, so as to meet the second receiving portion depth of different shafts 5.

In some embodiments, the gasket 6 is configured to be disposed within the first housing 21 and abut the key 4.

Alternatively, the gasket 6 is provided in one piece or two or more pieces.

In some embodiments, as shown in fig. 12 and 13, the hub connection assembly includes a baffle 7 and a connection member, the baffle 7 is disposed in the first sleeve 1 and located at an end of the second sleeve 2 for obstructing or preventing the second sleeve 2 from axial displacement, the baffle 7 is provided with a third through hole 71, and the connection member is configured to be inserted through the third through hole 71 to connect the shaft 5. The third through hole 72 has a diameter much smaller than the diameter of the shaft 5, and the baffle 7 is used to block or prevent the second sleeve 2 from being axially displaced on the shaft 5.

Alternatively, the attachment means comprise a bolt or screw, and the shaft 5 has a threaded bore for engagement with the bolt or screw.

In some embodiments, the axial bore formed in the first sleeve 1 comprises a first bore section 15 and a second bore section 16, the bore diameter of the first bore section 15 is smaller than the bore diameter of the second bore section 16, a step surface 17 is formed at the junction of the first bore section 15 and the second bore section 16, the second sleeve 2 is arranged on the first bore section 15, the baffle 7 is arranged on the second bore section 16, and the baffle 7 abuts against the step surface 17.

In some embodiments, the hub connection assembly comprises a pressure sensor provided in the first sleeve 1 for detecting the pressure in the oil reservoir 3.

In some embodiments, the pressure sensor is a wireless pressure sensor, and is used for detecting the pressure in the oil storage chamber 3, and when the working pressure in the oil storage chamber 3 is lower than a set value, the pressure sensor will give an alarm, and real-time monitoring can be performed in a monitoring room or a mobile phone app.

Some embodiments provide a coupling comprising the hub connection assembly described above.

Some embodiments provide a shaft-hub connection assembly that includes a first shaft, a second shaft, and a coupling as described above that connects the first shaft and the second shaft.

In some embodiments, the coupling includes a hub connection assembly disposed on the first shaft or the second shaft, the hub connection assembly connecting the second shaft or the first shaft.

In some embodiments, the coupling includes two hub connection assemblies, a first hub connection assembly and a second hub connection assembly. First hub coupling assembling locates the primary shaft, and the second hub coupling assembling locates the second shaft, and first hub coupling assembling connects second hub coupling assembling.

Couplings are used to connect two shafts that need to transmit power, for example: a driving shaft and a driven shaft. The shaft coupling includes two at least hub coupling assembling, and two hub coupling assembling install respectively on driving shaft and driven shaft, can connect according to the structural style of difference between two hub coupling assembling. For example: the first sleeves 1 of the two hub connecting assemblies are connected through a flange.

Wherein, the internal diameter of the second sleeve 2 in the hub connecting assembly is greater than the external diameter of the shaft 5 arranged in the hub connecting assembly in a penetrating way, and the second sleeve 2 is in clearance fit with the shaft 5.

In the description of the present invention, it should be understood that the terms "first", "second", "third", etc. are used to define the components, and are used only for the convenience of distinguishing the components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.

Furthermore, the technical features of one embodiment may be combined with one or more other embodiments advantageously without explicit negatives.

Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims

1. A hub connection assembly, comprising:

a first sleeve (1);

a second sleeve (2) arranged in the first sleeve (1), the second sleeve (2) being provided with a first accommodation portion (21), the first accommodation portion (21) being configured to cooperate with a second accommodation portion arranged on a shaft (5) penetrating in the second sleeve (2) to accommodate a key (4); and

the oil storage cavity (3) is arranged between the second sleeve (2) and the first sleeve (1);

wherein, first sleeve (1) be equipped with the oil duct of oil storage chamber (3) intercommunication, the oil duct is configured for supplying hydraulic oil enters into oil storage chamber (3), second sleeve (2) are configured for under the effect of the hydraulic oil of injecting to the axis direction of second sleeve (2) takes place deformation, in order to support and press axle (5).

2. The hub connection assembly of claim 1, further comprising a key (4), the key (4) being configured to be partially disposed within the first receptacle (21) and partially disposed outside the first receptacle (21) to mate with the second receptacle.

3. The hub connection assembly according to claim 1, wherein the first receptacle (21) comprises a key groove provided in the inner wall of the second sleeve (2), the key groove comprising an open side and a groove bottom opposite to the open side, a central region of the groove bottom being convex with respect to edge regions in a direction away from the central axis of the second sleeve (2), a surface of the groove bottom being a first arc-shaped surface;

the hub connection assembly further comprises a key (4), wherein the key (4) comprises a second arc-shaped surface (41), and the second arc-shaped surface (41) is configured to be arranged in the first accommodating part (21) and matched with and abutted against the first arc-shaped surface.

4. The hub connection assembly according to claim 1, wherein the first receiving portion (21) comprises a key groove provided in an inner wall of the second sleeve (2), the key groove comprising an open side, a groove bottom opposite to the open side, and a circumferential side wall provided between the open side and the groove bottom, a portion where the circumferential side wall meets the groove bottom being provided with a first groove (22) recessed toward a solid side of the second sleeve (2).

5. A hub connection assembly according to claim 2 or 3, wherein the key (4) is provided with an oil inlet hole (42) and an oil outlet groove (43), the oil outlet groove (43) being provided on a face of the key (4) abutting against the first receiving portion (21), the oil outlet groove (43) communicating with the oil inlet hole (42).

6. A hub connection assembly according to any one of claims 1 to 4, wherein the second sleeve (2) comprises a first protruding portion (23), the first protruding portion (23) extends from the outer wall of the second sleeve (2) to the direction away from the central axis of the second sleeve (2), and the inner wall of the second sleeve (2) corresponding to the position of the first protruding portion (23) is recessed to the direction away from the central axis of the second sleeve (2) to form the first accommodating portion (21);

the inner wall of the first sleeve (1) is provided with an accommodating groove (11), and the first protruding portion (23) is inserted into the accommodating groove (11).

7. The hub connection assembly according to claim 6, wherein the surface of the first protrusion (23) is a third arc-shaped surface, and the inner surface of the receiving groove (11) is a fourth arc-shaped surface, and the third arc-shaped surface is matched with and abutted against the fourth arc-shaped surface.

8. A hub connection assembly according to claim 6, characterized in that the outer wall of the second sleeve (2) is provided with a second groove (24) recessed towards its central axis, said second groove (24) being adjacent and connecting said first boss (23);

the second groove (24) extends along the axial direction of the second sleeve (2), and the second groove (24) is arranged on two sides of the first protruding portion (23).

9. The hub connecting assembly according to claim 1, wherein the wall of the second sleeve (2) is provided with a first through hole as the first accommodating portion (21) in a radial direction, the first accommodating portion (21) extends in an axial direction of the second sleeve (2) and penetrates through two axial ends of the second sleeve (2), two sides of the first accommodating portion (21) are provided with second protruding portions (25) protruding from an outer wall of the second sleeve in a direction of the first sleeve (1), and the second protruding portions (25) are connected with the first sleeve (1) in a sealing manner.

10. The hub connection assembly according to claim 9, further comprising a stop, the first sleeve (1) being provided with a second through hole (12) in a radial direction, the stop being configured to be inserted through the second through hole (12) to abut against a key (4) in the first housing (21).

11. A hub connection assembly according to claim 2 or 3, further comprising a spacer (6), the spacer (6) being configured to be provided on a side of the key (4) remote from the first receptacle (21) to be provided in the second receptacle (21) with the first receptacle (21) engaged therewith; alternatively, the spacer (6) is disposed in the first housing section (21) and is configured to abut against the key (4).

12. The hub connection assembly according to claim 1, characterized by comprising a baffle (7) and a connection element, the baffle (7) being arranged inside the first sleeve (1) and at the end of the second sleeve (2), the baffle (7) being provided with a third through hole (71), the connection element being configured to be arranged through the third through hole (71) for connecting the shaft (5).

13. The hub connection assembly according to claim 12, wherein the axial bore formed in the first sleeve (1) comprises a first bore section (15) and a second bore section (16), the bore diameter of the first bore section (15) is smaller than the bore diameter of the second bore section (16), a step surface (17) is formed at the junction of the first bore section (15) and the second bore section (16), the second sleeve (2) is arranged in the first bore section (15), the baffle plate (7) is arranged in the second bore section (16), and the baffle plate (7) abuts against the step surface (17).

14. A hub connection assembly according to claim 1, comprising a wireless pressure sensor provided in the first sleeve (1) for sensing the pressure in the oil reservoir (3).

15. A coupling comprising a hub connection assembly according to any one of claims 1 to 14.

16. A shaft-hub connection assembly comprising a first shaft, a second shaft, and the coupling of claim 15, said coupling connecting said first shaft and said second shaft.

17. The hub connection assembly of claim 16, wherein the coupling comprises two of said hub connection assemblies, a first hub connection assembly and a second hub connection assembly, respectively, said first hub connection assembly being disposed on said first shaft and said second hub connection assembly being disposed on said second shaft, said first hub connection assembly connecting said second hub connection assembly.