CN209278455U - A kind of variable speed drive - Google Patents

Abstract

The utility model provides a kind of variable speed drive, including gearbox and the transmission case being connect with the gearbox transmission, the gearbox includes gearbox body, and the transmission case includes transmission case body, and the inner cavity lower part of the gearbox body and the inner cavity lower part of the gearbox body are interconnected.By the way that the inner cavity lower part of the inner cavity lower part of transmission case body and gearbox body is interconnected, two intracorporal lubricating oil of case are mutually flowed, the amount for only needing a cabinet thereto to pour into lubricating oil or observation one of case intracorporal lubricating oil when use can be appreciated that the lubrication state of another cabinet, and use is more convenient.In addition, more lip anti-dust seals used by the utility model can store generated scrap when each transmission parts machinery merges in transmission case with nail collection slot, scrap is avoided to influence the sealing effect of oil sealing.

Description

A kind of variable speed drive

Technical field

The utility model relates to a kind of transmission parts of engineering truck, especially a kind of variable speed drive.

Background technique

The engine of engineering truck generates after power, it usually needs passes through the gearbox and transmission case being mutually sequentially connected Power is passed, gearbox and transmission case therein then constitute the variable speed drive of engineering truck.

In traditional variable speed drive, the cabinet of gearbox and transmission case is usually to be independently arranged, and the two is mutually not Connection, needs to pour into lubricating oil into the cabinet of the cabinet of transmission case and gearbox respectively before use, so as to corresponding gear or Axis may be dipped in lubricating oil and be lubricated, and not timing is also needed to observe the cabinet and speed change of transmission case respectively in use process The amount of lubricating oil in the cabinet of case either pours into the movement of lubricating oil or observes lubricating oil to ensure lubricant effect Movement requires twice of progress or more, and use is more inconvenient.

In view of this, the applicant conducts in-depth research the structure of variable speed drive, there is this case generation then.

Utility model content

Conveniently variable speed drive is used the purpose of this utility model is to provide a kind of.

To achieve the goals above, the utility model adopts the following technical solution:

A kind of variable speed drive, including gearbox and the transmission case being connect with the gearbox transmission, the gearbox Including gearbox body, the transmission case includes transmission case body, the inner cavity lower part of the gearbox body and the gearbox body it is interior Chamber lower part is interconnected.

As a kind of improvement of the utility model, the gearbox body has outside speed change towards the side of the transmission case body Flange, the transmission case body have the transmission outward flange being fitted on the speed change outward flange towards the side of the gearbox, It is mutually permanently connected between the speed change outward flange and the transmission outward flange by bolt assembly.

As a kind of improvement of the utility model, the bottom of the gearbox body is provided with the inner cavity with the gearbox body The lubricating oil pipe of connection, it is logical that the upper end of the transmission case body offers the transmission oil inlet being connected to the inner cavity of the transmission case body Road is provided with oil transfer pump on the lubricating oil pipe, and the lubricating oil pipe is connected to the transmission oil inlet passage.

As a kind of improvement of the utility model, the transmission case further includes being pierced by down from the inner cavity of the transmission case body To external transmission output shaft, more lip anti-dust seals are provided between the transmission output shaft and the transmission case body.

As a kind of improvement of the utility model, more lip anti-dust seals include the first oil seal body being mutually permanently connected With the second oil seal body, the inner sidewall of first oil seal body is provided with first that multiple axis along first oil seal body are arranged Sealing lip, each first sealing lip are gradually in tilted layout to the direction of the transmission output shaft from bottom to top, and two neighboring Nail collection slot is formed between first sealing lip, there are two the second sealing lips for the inner sidewall setting of second oil seal body.

As a kind of improvement of the utility model, the transmission case further includes horizontally disposed and connects with the gearbox transmission The transmission input shaft connect is provided with drive bevel gear on the transmission output shaft, be provided on the transmission output shaft with it is described The driven wheel of differential of drive bevel gear engagement, the oral area that the transmission oil inlet passage is connected to the inner cavity of the transmission case body are located at The top of the drive bevel gear.

By adopting the above technical scheme, the utility model has the following beneficial effects:

1, by the way that the inner cavity lower part of the inner cavity lower part of transmission case body and gearbox body is interconnected, so that in two cabinets Lubricating oil can mutually flow, when use only need thereto a cabinet pour into lubricating oil or the one of cabinet of observation The amount of lubricating oil be that can be appreciated that the lubrication state of another cabinet, use is more convenient.

2, more lip anti-dust seals used by the utility model can store each driving section in transmission case body with nail collection slot Part machinery generated scrap when merging, avoids scrap from influencing the sealing effect of oil sealing.

3, by the way that oil pipe to be connected to transmission oil inlet passage, forced feed lubrication can be carried out to transfer case, when engineering truck exists When bumpy road or tilted road surface are walked, transmission case inclination leads to the position of the intracorporal section transmission part of transmission case or driving member position When the lubricating oil set is lost, the lubricating oil that lubricating oil pipe provides can in time be supplemented it, and lubricant effect is relatively preferable.

Detailed description of the invention

Fig. 1 is the utility model engineering truck drive assembly structural schematic diagram；

Fig. 2 is the structural schematic diagram at another visual angle of the utility model engineering truck drive assembly；

Fig. 3 is the cutting structural schematic diagram that the utility model engineering truck is driven middle layer；

Fig. 4 is the partial enlarged view of position at A in Fig. 3；

Fig. 5 is the partial enlarged view of position at B in Fig. 3；

Fig. 6 is the partial enlarged view of position at C in Fig. 3；

Fig. 7 is the structural schematic diagram of the connector sleeve group in the utility model；

Fig. 8 is the structural schematic diagram at another visual angle of connector sleeve group in the utility model.

Clipped components and cut-away section line in figure, mark correspondence is as follows in figure:

10- engine；11- flywheel；

20- clutch；21- clutch lid；

22- platen；23- frictional disk；

30- transfer case；31- transfer casing；

32- transfer input shaft；33- input gear；

34- output gear；35- jackshaft；

36- intermediate gear；37- transfer output shaft；

38- axis splined hole；39- counterbore；

40- gearbox；41- gearbox body；

42- transmission input shaft；43- speed change outward flange；

50- transmission case；51- transmission case body；

52- transmission output shaft；The more lip anti-dust seals of 53-；

The first oil seal body of 53a-；The second oil seal body of 53b-；

The first sealing lip of 53c-；53d- nail collection slot；

The second sealing lip of 53e-；54- is driven outward flange；

55- is driven oil inlet passage；56- transmission input shaft；

57- drive bevel gear；58- driven wheel of differential；

60- air compressor machine；

61- lubricating oil return hole；62- lubricating oil pipe；

63- oil transfer pump；64- draws oilhole；

The second oil sealing of 65-；70- yielding coupling；

71- transition plates；80- connector sleeve group；

81- connector sleeve；82- expansion sleeve；

83- locking member；84- flange；

85- short slot；

90- spline housing；91- covers splined hole；

92- blanking cover；93- sealing ring；

The first oil sealing of 94-.

Specific embodiment

The utility model is described further in the following with reference to the drawings and specific embodiments.

Embodiment one.

As Figure 1-Figure 8, engineering truck drive assembly provided in this embodiment is substantially also a kind of engineering truck Driving engine structure, the clutch 20 and transfer case 30 that are sequentially connected including engine 10, respectively with engine 10 and clutch The gearbox 40 that device 20 is sequentially connected and the transmission case 50 being sequentially connected with gearbox 40, wherein transfer case 30 is located at clutch Between device 20 and gearbox 40, i.e., clutch 20, transfer case 30 and gearbox 40 are sequentially arranged.Preferably, the present embodiment provides Engineering truck drive assembly further include respectively with transfer case 30 be sequentially connected air compressor machine 60 and plunger pump (not shown), It is of course also possible to which above-mentioned air compressor machine 60 or plunger pump are replaced with gear pump or belt pulley.

Engine 10 has flywheel 11, and this kind of engine with flywheel is conventional engine, is widely used in all kinds of In engineering truck, the not emphasis of the present embodiment, and will not be described here in detail.

Clutch 20 include clutch lid 21, the platen 22 in clutch lid 21 and be located at platen 22 and flywheel 11 it Between frictional disk 23 (also referred to as driven disc or damping fin), certainly, clutch 20 should also including diaphragm spring etc. parts, these Part and its connection structure are identical as conventional clutch configuration, not the emphasis of the present embodiment, and and will not be described here in detail.Clutch cover Body 21 is fixedly connected on flywheel 11 indirectly directly or by clutch housing, and whether no matter clutch is in this way executes separation Movement, clutch lid 21 can still rotate under the drive of flywheel 11, provide power for transfer case 30；And in 20 company of execution of clutch When connecing movement, frictional disk 23 is pressed on flywheel 11 by platen 22, is rubbed with the frictional force drive between frictional disk 23 and flywheel 11 It wipes disk 23 to rotate, provides power for gearbox 40, when clutch 20 executes separating action, frictional disk 23 is due to losing platen 22 Pressure, between frictional disk 23 and flywheel 11 there is no frictional force generate or generated frictional force be not enough to drive frictional disk 23 rotations, no longer provide power for gearbox 40.

Gearbox 40 includes the inner cavity that gearbox body 41 and one end are located at gearbox body 41 and the other end from gearbox body 41 Inner cavity in the transmission input shaft 42 that is pierced by, the gearbox 40 with the gearbox body 41 and transmission input shaft 42 is conventional work Journey vehicle gear box.It is connected between transmission input shaft 42 and frictional disk 23 by yielding coupling 70, specifically, yielding coupling 70 input terminal is fixedly connected by spiral with frictional disk 23, and output end is fixedly connected by pin or key with transmission input shaft 42. It should be noted that the structure of yielding coupling 70 is identical as the structure of existing yielding coupling in the market, but in view of tool The dimensions of body, existing yielding coupling is likely difficult to directly use in the market, needs according to existing yielding coupling The dimensions self manufacture of structure according to actual needs.

Transmission case 50 includes transmission case body 51, the transmission case 50 that uses in the present embodiment and its between gearbox 40 Transmission connecting structure is all identical as conventional engineering truck.In addition, the transmission case body 51 in the present embodiment is fixedly connected on speed change On cabinet 41.

Specific transmission connecting structure between transfer case 30 and engine 10 can be conventional structure, such as by transfer case 30 and engine 10 the connection of crank or flywheel 11, but perhaps need to change the structure or needs of available engine in this way Occupy biggish space.Preferably, in the present embodiment, transfer case 30 and clutch lid 21 are sequentially connected, and realize transfer with this The transmission connection of case 30 and engine 10.

Transfer case 30 includes transfer casing 31, is rotatably connected on by bearing in transfer casing 31 and from transfer casing 31 The transfer input shaft 32 that is pierced by inner cavity, the input gear 33 for being fixedly connected or being integrally attached on transfer input shaft 32 and straight The output gear 34 for connecing or engaging indirectly with input gear 33, in the present embodiment, transfer case 30 further include being fixedly connected or one The jackshaft 35 and the intermediate gear 36 on jackshaft 35 is rotatably connected on by bearing that body is connected in transfer casing 31, input Gear 33 and output gear 34 pass through the indirect engagement engaged realized between the two with intermediate gear 36 respectively.In addition, output gear It is fixedly connected with or is connected with transfer output shaft 37 on wheel 34, transfer output shaft 37 is rotatably connected on transfer casing by bearing On 31.Certainly, transfer output shaft 37 and jackshaft 35 are all located in the inner cavity of transfer casing 31, and transfer output shaft 37, centre Axis 35 and transfer input shaft 32 are sequentially arranged from the top down.Transfer output shaft 37 can be with air compressor machine 60, plunger pump, gear pump and skin The transmission connection of one or two of belt wheel device, certainly, in this embodiment, the both ends of transfer output shaft 37 are sequentially connected respectively There are air compressor machine 60 and plunger pump.

Transfer input shaft 32 is hollow shaft, and transmission input shaft 42 is interspersed in transfer input shaft 32, this spline structure is more It is compact, certainly, needed between transmission input shaft 42 and transfer input shaft 32 there are gap, to guarantee that the two can be non-interfering It is rotated.In addition, transfer input shaft 32 and clutch lid 21 are sequentially connected, to realize between transfer case 30 and clutch lid 21 Transmission connection, specifically, in the present embodiment, being also connected with yielding coupling between transfer input shaft 32 and clutch lid 21 70, the input terminal of the yielding coupling 70 is fixedly connected with transition plates 71, and the transition plates 71 is solid by pin and clutch lid 21 Fixed connection, output end are fixedly connected by pin or key with transfer input shaft 32.

Air compressor machine 60 and plunger pump are all device possessed by conventional engineering truck, directly can commercially be obtained , wherein there is on the casing of air compressor machine 60 lubrication fuel feed hole and lubricating oil return hole 61.The input shaft of air compressor machine 60 and plunger pump All there is outer spline section, transfer output shaft 37 is the splined shaft with axis splined hole 38, the input shaft of air compressor machine 60 and plunger pump Outer spline section can be formed directly into the both ends of axis splined hole 38, realize that the transmission of air compressor machine 60 and plunger pump and transfer case 30 connects It connects, since the price of plunger pump is relatively high, in order to avoid the outer spline section damage on the input shaft of plunger pump leads to plunger pump Whole replacement is needed, provides a kind of spline connection of the external splines on the input shaft for being hardly damaged plunger pump in the present embodiment Structure, the structure include the above-mentioned splined shaft (i.e. transfer output shaft 37) with axis splined hole 38, and axis splined hole 38 is most Small internal diameter is greater than the maximum gauge of the outer spline section of the input shaft of air compressor machine 60 and plunger pump, it is preferred that for the ease of processing, axis Splined hole 38 only needs both ends to have internal spline.One end of axis splined hole 38 is provided with connector sleeve group 80, and the other end is provided with Spline housing 90, i.e. axis splined hole 38 are provided with spline housing 90 far from one end of connector sleeve group 80.

Connector sleeve group 80 is including connector sleeve 81, the expansion sleeve 82 being interspersed on connector sleeve 81 and for locking connector sleeve 81 With the locking member 83 of expansion sleeve 82, similar with conventional expansion sleeve, the side of expansion sleeve 82 offers short slot 85, which passes through The medial surface and lateral surface of logical expansion sleeve 82, to ensure that the diameter of expansion sleeve 82 can change.Short slot 85 on expansion sleeve 82 Quantity and its specific set-up mode can determine according to actual needs, for example, a short slot 85 only can be arranged in expansion sleeve 82, Can also be in the multiple short slots 85 of setting on expansion sleeve 82, one of endface position and outside of each short slot 85 in expansion sleeve 82 Connection, can also be arranged multiple short slots 85 on expansion sleeve 82, and part short slot 85 is the first short slot, and another part short slot 85 is the Two short slots, endface position of first short slot in one end of expansion sleeve 82 are connected to outside, and the second short slot is another expansion sleeve 82 The endface position at end is connected to outside, and the first short slot and the second short slot are successively alternately arranged.The lateral surface of connector sleeve 81 is arranged Have the first outer spline section cooperated with axis splined hole 38, and the medial surface of connector sleeve 81 is provided with internal taper hole, expansion sleeve 82 it is outer Side is provided with the male cone (strobilus masculinus) with internal taper hole cooperation, and the medial surface of expansion sleeve 82 is provided with internal spline section, the input of plunger pump Outer spline section on axis is interspersed in internal spline section, realizes the transmission connection between plunger pump and transfer case 30.

Locking member 83 can be conventional locking member, as long as it can ensure that expansion sleeve 82 can hold the input of plunger pump tightly Outer spline section on axis.Preferably, in the present embodiment, the lateral surface of expansion sleeve 82 is additionally provided with flange 84, flange 84 Positioned at the position of the relatively large one end of male cone (strobilus masculinus) diameter, offer through-hole on the flange 84, connector sleeve 81 with it is logical Offer threaded hole at the corresponding position in hole, locking member 83 is the bolt with nut, and the bolt is interspersed in through-holes and and spiral shell The connection of pit spiral, and the nut of the bolt is supported on flange 84.In use, by the outer spline section on the input shaft of plunger pump It is interspersed in internal spline section, then clamping screw, so that connector sleeve 81 and expansion sleeve 82 are tightened up in opposite directions, in internal taper hole and outer cone Under the collective effect of face, expansion sleeve 82 can be held tightly on the outer spline section on the input shaft of plunger pump, eliminate the input shaft of plunger pump On outer spline section and internal spline section between gap, it is ensured that shock will not be generated between the two, finally wear connector sleeve group 80 It is inserted in axis splined hole 38.It should be noted that being preferably formed with gap between flange 84 and the end face of connector sleeve 81 after assembly Both (can not i.e. contact), and the two sidewalls of short slot 85 will not be bonded to each other, and preferably holding can be achieved in this way, avoid due to The two sidewalls of the end face or short slot 85 of flange 84 and connector sleeve 81, which are bonded to each other, causes assembly crewman to be difficult to understand expansion sleeve 82 Whether hold tightly on the outer spline section on the input shaft of plunger pump.

Spline housing 90 has the set splined hole 91 coaxially arranged with spline housing 90, and 91 air compressor machine 60 of set splined hole is defeated The outer spline section for entering axis cooperates.One end of set splined hole 91 towards connector sleeve group 80 is sealedly connected with blanking cover 92, to prevent Lubricating oil on the input shaft of air compressor machine 60 flows in plunger pump through covering splined hole 91.Splined shaft (i.e. transfer output shaft 37) is in axis Splined hole 38 offers counterbore 39 of the internal diameter greater than the maximum outside diameter of axis splined hole 38, spline housing far from one end of connector sleeve group 80 The sealing ring 93 that 90 lateral surface is provided with the second outer spline section cooperated with axis splined hole 38 and cooperates with counterbore 39, sealing ring The first oil sealing 94 is provided between 93 and the inner sidewall of counterbore 39, the lubricating oil warp beam flower on the input shaft to prevent air compressor machine 60 Keyhole 38 flows in plunger pump.

In addition, the present embodiment additionally provides the lubrication system of engineering truck drive assembly, which includes above-mentioned transfer case 30 and gearbox 40, wherein under the inner cavity of the gearbox body 41 of the inner cavity lower part and gearbox 40 of the transfer casing 31 of transfer case 30 Portion is interconnected, and can share lubricating oil in this way.Specific connectivity structure (not shown) can basis between two cabinets Actual needs setting, such as two cabinets are fixedly connected and the aperture on two cabinets respectively, or by pipeline by the two Connection etc..Certainly, the lubrication system of engineering truck drive assembly provided in this embodiment can also include above-mentioned transmission case 50, The inner cavity lower part of the transmission case body 51 of transmission case 50 is also interconnected with the inner cavity lower part of gearbox body 41, and such three cabinets can Shared lubricating oil.It should be noted that being worn down since existing transmission case 50 would generally have from the inner cavity of transmission case body 51 The external oil leak in order to prevent of transmission output shaft 52 is arrived out, is preferably set between transmission output shaft 52 and transmission case body 51 Set more lip anti-dust seals 53.More lip anti-dust seals 53 include the first oil seal body 53a and the second oil seal body being mutually permanently connected 53b, wherein to be provided with multiple axis along the first oil seal body 53a are sequentially arranged first close for the inner sidewall of the first oil seal body 53a Lip 53c is sealed, each first sealing lip 53c is gradually in tilted layout to the direction of transmission output shaft 52 from bottom to top, and two neighboring the It is formed with nail collection slot 53d between one sealing lip 53c, in this way, nail collection slot 53d can store each transmission parts machine in transmission case body 51 Tool generated scrap when merging, avoids scrap from influencing the sealing effect of oil sealing.The inner sidewall of second oil seal body 53b is provided with two A second sealing lip 53e, the second sealing lip 53e are identical as the structure of sealing lip on conventional oil sealing, and and will not be described here in detail.

Preferably, the lubrication system of engineering truck drive assembly provided in this embodiment further includes above-mentioned air compressor machine 60, is become The bottom of fast cabinet 41 or transfer casing 31 is provided with the lubricating oil pipe 62 being connected to the inner cavity of corresponding cabinet, in this embodiment It is provided with by the bottom of gearbox body 41 and is illustrated for the lubricating oil pipe 62 of the inner cavity of corresponding cabinet connection.Lubricating oil Be provided with oil transfer pump 63 on pipe 62, and lubricating oil pipe 62 is connected to lubrication fuel feed hole, and lubricating oil return hole 61 then with transfer casing 31 inner cavity top connection, specifically, the casing of air compressor machine 60 is fixedly connected with transfer casing 31, transfer casing 31 is divided being located at Dynamic 37 lower section of output shaft and being located at offered at the position of 35 top of jackshaft be connected to lubricating oil return hole 61 draw oilhole 64, this Lubricating oil in gearbox body 41 or transfer casing 31 can be drawn into air compressor machine 60 and be lubricated to air compressor machine 60 by sample, profit Lubricating oil after cunning then successively by lubricating oil return hole 61 and draws oilhole 64 and returns in the inner cavity of transfer casing 31 and reuse, During reflux, these lubricating oil can moisten jackshaft 35 and transfer input shaft 32 and corresponding gear and bearing It is sliding.Certainly, in order to avoid lubricating oil flows out transfer casing 31, transfer input shaft 32 and transfer casing 31 along transfer input shaft 32 Between be preferably provided with the second oil sealing 65.

Preferably, lubricating oil pipe 62 be additionally attached to transfer casing 31 top and the top position of transfer casing 31 with point The inner cavity of dynamic cabinet 31 is interconnected, convenient for being lubricated to transfer output shaft 37 and corresponding gear and bearing.Likewise, Lubricating oil pipe 62 also can connect the top in transmission case body 51 and in the top position of transmission case body 51 and transmission case body 51 Inner cavity is interconnected, and leads to specifically, the upper end of transmission case body 51 offers the transmission oil inlet being connected to the inner cavity of transmission case body 51 Road 55, lubricating oil pipe 62 is connect with transmission oil inlet passage 55 and the two is interconnected.Certainly, lubricating oil pipe 62 not with gearbox body One end of 41 connections need to be arranged three branches, three branches respectively with transmission oil inlet passage 55, lubrication fuel feed hole and transfer The one-to-one mating connection of cabinet 31, and oil transfer pump 63 cannot be arranged on the branch road of lubricating oil pipe 62.

Embodiment two.

Shown in referring to figs. 2 and 3, a kind of variable speed drive is present embodiments provided, which can pass through clutch 20 It is sequentially connected with the engine 10 of engineering truck.The device includes gearbox 40 and the transmission case with the transmission connection of gearbox 40 50, it is the same as example 1, gearbox 40 includes gearbox body 41, and transmission case 50 includes transmission case body 51, gearbox body 41 Inner cavity lower part and the inner cavity lower part of gearbox body 41 are interconnected；What is different from the first embodiment is that the speed change due to this implementation passes Dynamic device can independently be sold, therefore there is no settings for by the inner cavity lower part of transfer casing 31 on its gearbox body 41 The interconnected connectivity structure with the inner cavity lower part of the gearbox body 41 of gearbox 40, in addition, in the present embodiment, gearbox body 41 have speed change outward flange 43 towards the side of transmission case body 51, and transmission case body has towards 51 to the side of gearbox 41 to be fitted in Transmission outward flange 54 on speed change outward flange 43, it is mutually solid by bolt assembly between speed change outward flange 43 and transmission outward flange 54 Fixed connection, installs and safeguards in this way and is more convenient.It should be noted that bolt assembly is conventional mutually matched bolt, spiral shell Female and gasket, can directly buy acquisition, and will not be described here in detail from the market.

The bottom of gearbox body 41 in the present embodiment is again provided with the lubricating oil being connected to the inner cavity of gearbox body 41 Pipe 62 is also equipped with oil transfer pump 63 on lubricating oil pipe 62, and implements unlike one, in the present embodiment, 62 nothing of lubricating oil pipe Branch need to be set, and the one end not connecting with gearbox body 41 is directly connect with transmission oil inlet passage 55.

In addition, the transmission case 50 in this implementation further includes being pierced by vertically down from the inner cavity of transmission case body 51 to external biography Dynamic output shaft 52 and transmission input shaft 56 horizontally disposed and with the transmission connection of the output shaft of gearbox 40, wherein gearbox 40 output shaft and the specific transmission connecting structure of transmission input shaft 56 are conventional structure, not emphasis in the present embodiment, this Place is no longer described in detail.It is provided with drive bevel gear 57 on transmission input shaft 56, is provided on transmission output shaft 52 and drive bevel gear The driven wheel of differential 58 of 57 engagements, realizes transmission connection between the two with this, certainly, transmission output shaft 52 and transmission case body 51 Between be again provided with the more lip anti-dust seals 53 being the same as example 1.

Preferably, in the present embodiment, the oral area that transmission oil inlet passage 55 is connected to the inner cavity of transmission case body 51 is located at master The top of dynamic bevel gear 57, convenient for being lubricated to drive bevel gear 57 and driven wheel of differential 58.It should be noted that be driven into The oral area that oily channel 55 is connected to the inner cavity of transmission case body 51 can have it is multiple (i.e. transmission oil inlet passage 55 not for only there are two The straight channel of oral area), when it has it is multiple when, only need one of them to be located at the top of drive bevel gear 57.

Embodiment three.

The difference between this embodiment and the first embodiment lies in the present embodiment, the side of expansion sleeve 82 equally offers scarce Slot 85, the medial surface and lateral surface of the short slot 85 equally perforation expansion sleeve 82, to ensure that the diameter of expansion sleeve 82 can change, but It is, but the short slot 85 is connected in one of endface position of expansion sleeve 82 with outside, and another end face position of expansion sleeve 82 It sets and is connected with connection ring, the lateral surface of the connection ring is provided with external thread section, and certainly, the inner hole of the connection ring cannot influence Outer spline section on the input shaft of plunger pump is penetrated, locking member is the connection spiral shell being connected on above-mentioned external thread section with spiral Mother, one end of the attaching nut towards male cone (strobilus masculinus) are supported on connector sleeve 81, and the relatively small one end direction in internal taper hole aperture Attaching nut.

In use, the outer spline section on the input shaft of plunger pump is interspersed in internal spline section, connection spiral shell has then been locked Mother, so that connector sleeve 81 and expansion sleeve 82 are tightened up in opposite directions, under internal taper hole and male cone (strobilus masculinus) collective effect, expansion sleeve 82 can be held tightly On the outer spline section on the input shaft of plunger pump, eliminate between the outer spline section on the input shaft of plunger pump and internal spline section Gap, it is ensured that shock will not be generated between the two, finally connector sleeve group 80 is interspersed in axis splined hole 38.

The utility model is described in detail above in conjunction with attached drawing, but the embodiments of the present invention and not only It is limited to above embodiment, those skilled in the art can make various modifications to the utility model according to the prior art, these Belong to the protection scope of the utility model.

Claims (5)

1. a kind of variable speed drive, including gearbox and the transmission case being connect with the gearbox transmission, which is characterized in that institute Stating gearbox includes gearbox body, and the transmission case includes transmission case body, the inner cavity lower part of the gearbox body and the speed change The inner cavity lower part of cabinet is interconnected；

The bottom of the gearbox body is provided with the lubricating oil pipe being connected to the inner cavity of the gearbox body, the transmission case body Upper end offers the transmission oil inlet passage being connected to the inner cavity of the transmission case body, is provided with oil transfer pump on the lubricating oil pipe, And the lubricating oil pipe is connected to the transmission oil inlet passage.

2. variable speed drive as described in claim 1, which is characterized in that the gearbox body is towards the transmission case body Side has speed change outward flange, and the transmission case body has towards the side of the gearbox to be fitted on the speed change outward flange Transmission outward flange, be mutually permanently connected between the speed change outward flange and the transmission outward flange by bolt assembly.

3. variable speed drive as described in claim 1, which is characterized in that the transmission case further includes from the transmission case body Inner cavity be pierced by external transmission output shaft down, it is anti-that more lips are provided between the transmission output shaft and the transmission case body Dirt oil sealing.

4. variable speed drive as claimed in claim 3, which is characterized in that more lip anti-dust seals include the company of being fixed to each other The first oil seal body and the second oil seal body connect, the inner sidewall of first oil seal body are provided with multiple along first oil seal body First sealing lip of axis arrangement, each first sealing lip gradually tilt cloth to the direction of the transmission output shaft from bottom to top It sets, and is formed with nail collection slot between two neighboring first sealing lip, there are two the inner sidewall settings of second oil seal body Second sealing lip.

5. variable speed drive as claimed in claim 3, which is characterized in that the transmission case further include it is horizontally disposed and with institute The transmission input shaft of gearbox transmission connection is stated, is provided with drive bevel gear, the transmission output shaft on the transmission input shaft On be provided with the driven wheel of differential engaged with the drive bevel gear, the inner cavity of the transmission oil inlet passage and the transmission case body The oral area of connection is located at the top of the drive bevel gear.