CN209621878U - Attachment device and crane - Google Patents

Abstract

The utility model provides a kind of attachment device and crane, belongs to Transport Machinery technical field.The attachment device includes connecting shaft, attachment base and connector.Attachment base is hollow, and connecting shaft is mounted in attachment base, and connecting shaft can rotate in attachment base by center of rotation of the central axis of connecting shaft.Connecting shaft includes first end and second end, and the first end of connecting shaft is connect with connector, and connector is used for and the transmission axis connection in crane.Splined hole is provided in the second end of connecting shaft, the splined shaft on oil pump is connect with the splined hole in connecting shaft second end.The crane includes transmission shaft, oil pump and above-mentioned attachment device, and transmission shaft and oil pump are connect with attachment device respectively.The utility model improves the technical issues of prior art cannot effectively realize power transmitting.

Description

Attachment device and crane

Technical field

The utility model relates to Transport Machinery technical fields, in particular to a kind of attachment device and crane.

Background technique

Crane refers to more movement hoisting machineries of vertical-lift in a certain range and horizontal carrying heavy goods, also known as day Vehicle, hanging, crane.

Oil pump and engine are provided in crane, oil pump and transmission axis connection, transmission shaft are connect with engine, and oil pump is used In oil suction and pressure oil to drive crane to make various movements.Wherein, the movement of oil pump is driven generally by engine driving Axis transmits oil-feed pump again and realizes.

But existing transmission shaft is different from the interface manufacturer's standard of oil pump, the interface of transmission shaft and oil pump is often not Match, cannot effectively realize the transmitting of power.

Utility model content

The purpose of this utility model is to provide a kind of attachment device and cranes, cannot be effectively real to solve the prior art The technical issues of existing power transmitting.

The utility model provides a kind of attachment device, including connecting shaft, attachment base and connector；

Attachment base is hollow, and connecting shaft is mounted in attachment base, and connecting shaft can be in attachment base with the center of connecting shaft Axis is center of rotation rotation；

Connecting shaft includes first end and second end, and the first end of connecting shaft is connect with connector, and connector is used for and lifting Transmission axis connection in machine；

Splined hole is provided in the second end of connecting shaft, the splined shaft on oil pump and the splined hole in connecting shaft second end connect It connects.

It further, further include bearing, bearing is mounted between attachment base and connecting shaft.

Further, attachment base is located at ipsilateral one end with the second end of connecting shaft and is equipped with fixed plate, fixed plate with Oil pump connection；

Hole is set in fixed plate, and hole is for enabling the second end of connecting shaft and the spline axis connection on oil pump.

Further, the hole in fixed plate be stepped hole, stepped hole can with around the splined shaft root on oil pump Annular protrusion abuts.

Further, bearing includes first bearing and second bearing, the axial direction of first bearing and second bearing along connecting shaft Interval is mounted in connecting shaft；

It is provided with the first circlip in the second end of connecting shaft between fixed plate and second bearing, and fixed plate Side wall and the side wall of second bearing are abutted with the first circlip.

Further, being located on ipsilateral one end with the first end of connecting shaft for attachment base is equipped with end cap；

Perforation is provided on end cap, the perforation that the first end of connecting shaft passes through on end cap is connect with connector.

Further, bearing includes first bearing and second bearing, the axial direction of first bearing and second bearing along connecting shaft Interval is mounted in connecting shaft；

The second circlip, and the side wall and first axle of end cap are provided in connecting shaft between end cap and first bearing The side wall held is abutted with the second circlip；

It is provided with sealing ring between connecting shaft and the perforation of end cap, is provided between sealing ring and end cap in connecting shaft Third circlip.

Further, it is provided with lubrication hole on the side wall of attachment base, lubrication hole is connected to attachment base；

Lid is covered on lubrication hole.

Further, it is provided with spline in the first end of connecting shaft, is provided in connector in the first end with connecting shaft The corresponding splined hole of spline；

The first end of connecting shaft passes through the splined hole on connector, and is connected by screw to connector.

The utility model provides a kind of crane, including described in any one of transmission shaft, oil pump and above-mentioned technical proposal Attachment device, transmission shaft and oil pump are connect with attachment device respectively.

Attachment device provided by the utility model and lifting function generate it is following the utility model has the advantages that

Attachment device provided by the utility model includes connecting shaft, attachment base and connector, and attachment base is hollow, connecting shaft peace In attachment base.Connecting shaft includes first end and second end, and the first end of connecting shaft is connect with connector, connector and lifting Transmission shaft in machine matches, the transmission axis connection in connector and crane.Spline in the second end and oil pump of connecting shaft Axis matches, and splined hole is provided in the second end of connecting shaft, the splined shaft on oil pump and the splined hole in connecting shaft second end Connection.

In the course of work in crane, the transmission shaft of rotation will drive connector rotation, and connector will drive connection The first end of axis rotates, and connecting shaft can be to rotate in rotation with the central axis of connecting shaft in attachment base at this time, then connects The second end of axis will drive the rotation of the splined shaft on oil pump.

Compared with prior art, attachment device provided by the utility model can be matched using connector with transmission shaft, benefit It can be matched with oil pump with the splined hole in connecting shaft second end, can effectively be realized by connector, connecting shaft and attachment base Power train process between transmission shaft and oil pump.

As can be seen that attachment device provided by the utility model, which improves the prior art, cannot effectively realize power transmitting Technical problem.

Crane provided by the utility model includes transmission shaft, oil pump and above-mentioned attachment device, and transmission shaft and oil pump are distinguished It is connect with attachment device.

Crane provided by the utility model includes above-mentioned attachment device, thus is had with identical with above-mentioned attachment device Beneficial effect.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram for the attachment device that the utility model embodiment one provides；

Fig. 2 is the cross-sectional view of the attachment device in Fig. 1.

In figure:

1- connecting shaft；10- first end；11- second end；2- attachment base；20- fixed plate；200- stepped hole；21- end cap； 22- lubrication hole；23- lid；230- stopper；231- lifts portion；24- spacer；3- connector；4- first bearing；The second axis of 5- It holds；The first circlip of 6-；The second circlip of 7-；8- sealing ring；9- third circlip.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described Embodiment be only the utility model a part of the embodiment, instead of all the embodiments.Usually described in attached drawing here It can arrange and design with a variety of different configurations with the component of the utility model embodiment shown.Therefore, below to The detailed description of the embodiments of the present invention provided in attached drawing is not intended to limit the model of claimed invention It encloses, but is merely representative of the selected embodiment of the utility model.Based on the embodiments of the present invention, those skilled in the art exist Every other embodiment obtained under the premise of creative work is not made, is fallen within the protection scope of the utility model.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In addition, in the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition State the concrete meaning of term in the present invention.

The utility model provides a kind of attachment device and crane, with reference to the accompanying drawing to connection provided by the utility model Device and crane are described in detail:

Embodiment one:

As shown in Figs. 1-2, attachment device provided in this embodiment includes connecting shaft 1, attachment base 2 and connector 3.Attachment base 2 is hollow, and connecting shaft 1 is mounted in attachment base 2, and connecting shaft 1 can be rotation with the central axis of connecting shaft 1 in attachment base 2 Center rotating.

Wherein, connecting shaft 1 includes first end 10 and second end 11, and the first end 10 of connecting shaft 1 is connect with connector 3, even Fitting 3 is used for and the transmission axis connection in crane.Splined hole, the spline on oil pump are provided in the second end 11 of connecting shaft 1 Axis is connect with the splined hole in 1 second end 11 of connecting shaft.

In the present embodiment, connector 3 matches with the transmission shaft in crane, the flower in the second end 11 of connecting shaft 1 Keyhole matches with the splined shaft on oil pump.In the course of work of crane, the transmission shaft of rotation will drive 3 turns of connector Dynamic, the first end 10 that connector 3 will drive connecting shaft 1 rotates, and connecting shaft 1 can be in attachment base 2 with connecting shaft 1 at this time Central axis is to rotate in rotation, and then the second end 11 of connecting shaft 1 will drive the rotation of the splined shaft on oil pump.

Compared with prior art, attachment device provided in this embodiment can be matched using connector 3 with transmission shaft, be utilized Splined hole in 1 second end 11 of connecting shaft can be matched with oil pump, can be effective by connector 3, connecting shaft 1 and attachment base 2 Realize the power train process between transmission shaft and oil pump.

Therefore, attachment device provided in this embodiment, which improves the prior art, cannot effectively realize that the technology of power transmitting is asked Topic.

In practical applications, the flower on splined shaft and 1 second end 11 of connecting shaft to prevent in transmission process, on oil pump Be detached between keyhole, can by attachment device attachment base 2 and oil pump be each attached on crane, while attachment base should be made Gap between 2 and oil pump is smaller, and the splined shaft on oil pump can extend to the splined hole in 1 second end 11 of connecting shaft outside at this time In.

Alternatively, being detached between the splined hole in 1 second end 11 of the splined shaft on oil pump and connecting shaft in order to prevent, can incite somebody to action It links together between the shell and attachment base 2 of oil pump.

Wherein, splined hole is arranged in 1 second end 11 of connecting shaft is to enable connecting shaft 1 and the splined shaft on oil pump Preferably match.

As shown in Fig. 2, attachment device provided in this embodiment further includes bearing, bearing is mounted on attachment base 2 and connecting shaft 1 Between.

Bearing is installed between attachment base 2 and connecting shaft 1, connecting shaft 1 can be enable to rotate in attachment base 2.

Wherein, bearing is rolling bearing, and there are many combining forms for rolling bearing, such as combine without inner ring needle roller and thrust ball Bearing has inner ring needle roller and thrust ball combination bearing with outer cover, needle roller and angular contact ball combination bearing, needle roller and three point contact Ball combination bearing and without inner ring needle roller and cylindrical roller thrust combination bearing etc..

In practical applications, the combining form of rolling bearing can be selected according to actual needs.

As depicted in figs. 1 and 2, attachment base 2 is located on ipsilateral one end with the second end 11 of connecting shaft 1, can install There is fixed plate 20, fixed plate 20 is connect with oil pump.Hole is set in fixed plate 20, and hole is used to make the second end of connecting shaft 1 11 can be with the spline axis connection on oil pump.

In the present embodiment, it can be and to be fixed together between fixed plate 20 and the end of attachment base 2, be also possible to one Body formed.Hole in fixed plate 20 is convenient for being connected to fixed plate 20 with attachment base 2, so that the splined shaft on oil pump can It links together with the splined hole in 1 second end 11 of connecting shaft.

Wherein, it can be bolted between fixed plate 20 and oil pump together, so that between fixed plate 20 and oil pump Can be opposing stationary, caused by the oil pump of the fixed plate 20 or vibration that prevent the splined shaft in transmission process on oil pump to be vibrated Shearing force, and then splined shaft can be prevented to be destroyed.

Further, as depicted in figs. 1 and 2, the hole in fixed plate 20 can be stepped hole 200, and stepped hole 200 can It is abutted with the annular protrusion around the splined shaft root on oil pump.

The root of splined shaft on existing oil pump is provided with protrusion, sets rank for the hole in fixed plate 20 Terraced hole 200 can make to abut between oil pump and fixed plate 20, prevent oil pump due to vibration and enter inside attachment base 2, Yi Jifang Only oil pump hits the bearing inside attachment base 2.

Further, as shown in Fig. 2, the bearing in the present embodiment includes first bearing 4 and second bearing 5, first bearing 4 It is mounted in connecting shaft 1 with second bearing 5 along the axially spaced-apart of connecting shaft 1.

Wherein, the first circlip is provided between fixed plate 20 and second bearing 5 in the second end 11 of connecting shaft 1 6, and the side wall of fixed plate 20 and the side wall of second bearing 5 are abutted with the first circlip 6.

In practical applications, bearing can be multiple, and the number of the preferred bearing of the present embodiment is two, one of bearing For first bearing 4, another bearing is second bearing 5.

Further, there is no limit the preferred first bearings 4 of the present embodiment for the interval between first bearing 4 and second bearing 5 It is mounted in the first end 10 of attachment base 2, second bearing 5 is mounted in the second end 11 of attachment base 2.

As shown in Fig. 2, there is between first bearing 4 and second bearing 5 and attachment base 2 cavity at this time, and connecting shaft 1 will Above-mentioned cavity is divided into two cavitys.

Further, to keep transmission process more efficient, and extend first bearing 4 and second bearing 5 use the longevity Life, can fill lubricating oil into above-mentioned two cavity, and lubricating oil can flow in first bearing 4 and second bearing 5, with profit Sliding first bearing 4 and second bearing 5.

As shown in Fig. 2, the first circlip 6 between fixed plate 20 and second bearing 5, can play buffer function.In In transmission process, second bearing 5 and fixed plate 20 will receive vibration, and the first bullet is arranged between second bearing 5 and fixing piece Property retaining ring 6 can prevent from hitting mutually between second bearing 5 and fixed plate 20.As can be seen that the first circlip 6 can extend The service life of attachment device provided in this embodiment.

Further, the material of the first circlip 6 can be the preferable material of elasticity, the preferably first elasticity of the present embodiment The material of retaining ring 6 is the preferable silica gel of elasticity.

As shown in Fig. 2, being located on ipsilateral one end with the first end 10 of connecting shaft 1 for attachment base 2, can be equipped with end cap 21.Perforation is provided on end cap 21, the perforation that the first end 10 of connecting shaft 1 passes through on end cap 21 is connect with connector 3.

In practical applications, the inner sidewall of end cap 21 can be to 2 internal projection of attachment base, the inner sidewall energy of end cap 21 It is enough to be abutted with first bearing 4, play the role of limit and fixation to first bearing 4.

Wherein, there is no limit for the connection type between end cap 21 and attachment base 2, as shown in Fig. 2, in the present embodiment, end cap 21 are fixed on the end of attachment base 2 by bolt.

Being bolted can not only be fixed on end cap 21 on attachment base 2, be also convenient for dismantling end cap 21 from attachment base 2 Get off, in order to replace end cap 21.

When bearing includes first bearing 4 and second bearing 5, first bearing 4 and second bearing 5 are between the axial direction of connecting shaft 1 When being mounted in connecting shaft 1, as shown in Fig. 2, can be set in connecting shaft 1 between end cap 21 and first bearing 4 Two circlips 7, and the side wall of end cap 21 and the side wall of first bearing 4 are abutted with the second circlip 7.

Wherein, as shown in Fig. 2, being also provided with sealing ring 8 between connecting shaft 1 and the perforation of end cap 21, in connecting shaft 1 Third circlip 9 is provided between sealing ring 8 and end cap 21.

As shown in Fig. 2, the second circlip 7 between end cap 21 and first bearing 4, can play buffer function.It is passing During dynamic, end cap 21 and first bearing 4 will receive vibration, and the second elasticity gear is arranged between end cap 21 and first bearing 4 Circle 7 can prevent from hitting mutually between end cap 21 and first bearing 4, and the second circlip 7 can equally extend the present embodiment and mention The service life of the attachment device of confession.

Further, the material of the second circlip 7 is also the preferable material of elasticity, the present embodiment the preferably first elasticity gear The material of circle 6 is the preferable silica gel of elasticity.

Sealing ring 8 between connecting shaft 1 and the perforation of end cap 21 can play sealing function, prevent impurity along end cap 21 Enter pollution first bearing 4 and second bearing 5 in attachment base 2 between perforation and 1 side wall of connecting shaft.

And sealing ring 8 can also play buffer function, prevent from mutually bumping against between the end cap being vibrated 21 and connecting shaft 1 It hits, can equally extend the service life of attachment device provided in this embodiment.

Further, the material of sealing ring 8 is also the preferable material of elasticity, and the material of the preferred sealing ring 8 of the present embodiment is The preferable silica gel of elasticity.

As shown in Fig. 2, lubrication hole 22 can be set on the side wall of attachment base 2, lubrication hole 22 is connected to attachment base 2.

Further, as depicted in figs. 1 and 2, lid 23 is covered on lubrication hole 22.

Wherein, lubrication hole 22 is connected to attachment base 2, and the lid of lid 23 closes on lubrication hole 22, can be with after lid 23 is taken down Lubricating oil is filled into lubrication hole 22, lubricating oil can flow between first bearing 4, second bearing 5, connecting shaft 1 and attachment base 2 It in the cavity of formation, and then flows in first bearing 4 and second bearing 5, reaches the mesh of lubrication first bearing 4 and second bearing 5 's.

In order to make to be coated with lubrication at the position for being located at 1 two sides of connecting shaft in first bearing 4 and in second bearing 5 Two lubrication holes 22 are arranged in oil, the present embodiment preferably on the side wall of attachment base 2, and the position of two lubrication holes 22 is opposite.

After being filled into enough lubricating oil into lubrication hole 22, lid 23 can be continued to lid and closed on lubrication hole 22, with Prevent lubricating oil from flowing out from lubrication hole 22.

In practical applications, it cannot be removed to prevent lid 23 from entering in lubrication hole 22, far from attachment base on lid 23 Stopper 230 can be set on 2 end, as depicted in figs. 1 and 2, stopper 230 can on attachment base 2 be located at lubrication hole 22 The side wall of surrounding abuts.

Wherein, more stable between lid 23 and stopper 230 to make, using effect is more preferable, between stopper 230 and lid 23 It can be affixed, be also possible to integrally formed.

Stopper 230 can play barrier effect, prevent lid 23 that cannot be removed completely into lubrication hole 22.

Further, can be arranged in the stopper 230 of lid 23 and mention convenient for taking out lid 23 from lubrication hole 22 Portion 231 is played, as shown in Figs. 1-2.

Wherein, lift portion 231 to be convenient for carrying out lid 23 lid conjunction and take out work, thus on the preferred lid 23 of the present embodiment Stopper 230 on be provided with the portion of lifting 231.

Further, lift be also possible between portion 231 and stopper 230 it is affixed, alternatively, lifting portion 231,230 and of stopper It can be integrally formed between lid 23.

Wherein, effect is closed in order to reach preferable lid, can be interference fit between lid 23 and lubrication hole 22.

Further, the shape of lid 23 is cylinder, and the material of lid 23 can be the preferable rubber of elasticity, to reach The effect of interference fit, the diameter of lid 23 are slightly larger than the diameter of lubrication hole 22.

Effect is closed in order to reach preferable lid, can be set on the inner sidewall of lubrication hole 22 with 23 position corresponding position of lid Screw thread corresponding with the screw thread on 22 inner sidewall of lubrication hole can be set on the lateral wall of lid 23, in order to cover in screw thread Body 23 can be threaded in lubrication hole 22.

The mode of threaded connection is not only convenient for taking out lid 23 from lubrication hole 22, and can make lid 23 and lubrication hole Connection between 22 is more stable.

Further, to keep first bearing 4 and second bearing 5 more stable, can attachment base 2 inner sidewall it is upper It is fitted with spacer 24 between first bearing 4 and second bearing 5, hole can be set on spacer 24, so that spacer 24 can It is connected to lubrication hole 22, the lubricating oil entered in lubrication hole 22 is able to enter between first bearing 4 and second bearing 5.

In the present embodiment, spline can be set in the first end 10 of connecting shaft 1, has been provided with and connects in connector 3 The corresponding splined hole of spline in the first end 10 of axis 1.

Wherein, the first end 10 of connecting shaft 1 passes through the splined hole on connector 3, and is connected by screw to connector 3.

Spline is set in the first end 10 of connecting shaft 1, and splined hole is set in connector 3, is to make to connect Axis 1 can preferably band follower link 3 rotate, and keep the transmission process between connecting shaft 1 and connector 3 more efficient.

In practical applications, connector 3 can be flange, or shaft coupling, the preferred connector 3 of the present embodiment are method It is blue.

Wherein, splined hole can be set on flange on the inner sidewall of 1 first end 10 of connecting shaft, the other end of flange For with the transmission axis connection in crane.As shown in Fig. 2, can be set between the both ends of flange on the inner sidewall of flange There is screw fixed part, screw is installed on screw fixed part.

It is corresponding with the screw on flange, threaded hole can be set in the first end 10 of connecting shaft 1, at this time on flange Screw may be threadably coupled in the first end 10 of connecting shaft 1.

Wherein, the spline connection type between connector 3 and the first end 10 of connecting shaft 1 may be replaced by flat key connection Mode.

Embodiment two:

Crane provided in this embodiment includes the attachment device in transmission shaft, oil pump and embodiment one, transmission shaft and oil Pump is connect with attachment device respectively.

Crane provided in this embodiment includes the attachment device that embodiment one provides, it can be seen that the present embodiment provides Crane and embodiment one provide attachment device can solve identical technical problem, reach identical technical effect.This reality The crane for applying example offer equally improves the technical issues of prior art cannot effectively realize power transmitting.

Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications, Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be wanted with the right Subject to the protection scope asked.

Claims (10)

1. a kind of attachment device, which is characterized in that including connecting shaft (1), attachment base (2) and connector (3)；

The attachment base (2) is hollow, and the connecting shaft (1) is mounted in the attachment base (2), and the connecting shaft (1) can It is rotated in the attachment base (2) by center of rotation of the central axis of the connecting shaft (1)；

The connecting shaft (1) includes first end (10) and second end (11), first end (10) and the company of the connecting shaft (1) Fitting (3) connection, the connector (3) are used for and the transmission axis connection in crane；

It is provided with splined hole in the second end (11) of the connecting shaft (1), the splined shaft on oil pump and the connecting shaft (1) second Hold the splined hole connection on (11).

2. attachment device according to claim 1, which is characterized in that further include bearing, the bearing is mounted on the company Between joint chair (2) and the connecting shaft (1).

3. attachment device according to claim 2, which is characterized in that the attachment base (2) with the connecting shaft (1) Second end (11) is located at ipsilateral one end and is equipped with fixed plate (20), and the fixed plate (20) connect with oil pump；

Hole is set on the fixed plate (20), and described hole is used to make the second end (11) of the connecting shaft (1) can be with Spline axis connection on oil pump.

4. attachment device according to claim 3, which is characterized in that the hole on the fixed plate (20) is stepped hole (200), the stepped hole (200) can abut with the annular protrusion around the splined shaft root on oil pump.

5. attachment device according to claim 3, which is characterized in that the bearing includes first bearing (4) and the second axis It holds (5), the first bearing (4) and the second bearing (5) are mounted on the connection along the axially spaced-apart of the connecting shaft (1) On axis (1)；

It is provided between the fixed plate (20) and the second bearing (5) in the second end (11) of the connecting shaft (1) First circlip (6), and the side wall of the fixed plate (20) and the side wall of the second bearing (5) are elastic with described first Retaining ring (6) abuts.

6. attachment device according to claim 2, which is characterized in that the attachment base (2) with the connecting shaft (1) First end (10), which is located on ipsilateral one end, is equipped with end cap (21)；

Perforation is provided on the end cap (21), the first end (10) of the connecting shaft (1) passes through wearing on the end cap (21) Hole is connect with the connector (3).

7. attachment device according to claim 6, which is characterized in that the bearing includes first bearing (4) and the second axis It holds (5), the first bearing (4) and the second bearing (5) are mounted on the connection along the axially spaced-apart of the connecting shaft (1) On axis (1)；

The second circlip is provided between the end cap (21) and the first bearing (4) on the connecting shaft (1) (7), and the side wall of the end cap (21) and the side wall of the first bearing (4) are abutted with second circlip (7)；

It is provided between the connecting shaft (1) and the perforation of the end cap (21) sealing ring (8), is located on the connecting shaft (1) Third circlip (9) are provided between the sealing ring (8) and the end cap (21).

8. according to the described in any item attachment devices of claim 2-7, which is characterized in that set on the side wall of the attachment base (2) It is equipped with lubrication hole (22), the lubrication hole (22) is connected to the attachment base (2)；

Lid (23) are covered on the lubrication hole (22).

9. attachment device according to claim 1, which is characterized in that be arranged in the first end (10) of the connecting shaft (1) There is spline, the corresponding spline of the spline being provided in the first end (10) with the connecting shaft (1) in the connector (3) Hole；

The first end (10) of the connecting shaft (1) passes through the splined hole on the connector (3), and logical with the connector (3) Cross screw connection.

10. a kind of crane, which is characterized in that including transmission shaft, oil pump and the described in any item connection dresses of claim 1-9 It sets, the transmission shaft and the oil pump are connect with the attachment device respectively.