CN204942201U - Parts on shaft position structure - Google Patents

Abstract

The utility model discloses a kind of parts on shaft position structure, comprising: the first part first end positioning part; First part second end positioning part, this first part second end positioning part comprises corresponding first part second end and has the second key pin groove, and the key pin that is matched with this second key pin groove, and this key pin holds out against the first part second end; Second part circumference positioning part, this second part circumference positioning part is configured to have the keyway with key pins at its hub bore; Second part axial positioning and locking portion, this second part axial positioning and locking portion is included in radial direction on the second part keyway position and has top wire hole, and coordinates with this top wire hole and compress the jackscrew of key pin.According to the utility model, there is good compound positioning action.

Description

Parts on shaft position structure

Technical field

The utility model relates to a kind of parts on shaft position structure.

Background technique

The structural design (referring to " mechanical design handbook "-Machine Components and Parts Design-axle system chapters and sections) of axle depends on the loading conditions of axle, the layout of parts on shaft and means of fixation, and the type of bearing and size, the blank of axle, manufacture and assembly technology and installation, traffic condition.

Wherein, the fixing or connecting mode of parts on shaft, with the effect of part.The location of parts on shaft on axle relates to the content in two, first parts on shaft axial fixing structure (axially locating is with fixing), and another is parts on shaft circumference fixed structure (circumference is located and fixed).

Generally speaking, the fixing and connecting mode of parts on shaft uses axle self structure to realize on the one hand, needs on the other hand to coordinate other parts on shaft or assisted fasteners to realize.The such as shaft shoulder and the axle collar are the basic structure realizing axially locating, this structure accurate positioning, and can bear larger axial force, in order to realize fixing on axle of part, also needing to hold out against part from the shaft shoulder or the relative side of the axle collar and realizing fixing.

Usually, such as to the location of a gear on gear shaft and fixing, the axially locating of gear is realized on the one hand by the such as shaft shoulder, the circumference location of gear is realized on the other hand by key, and then by such as axle sleeve coordinating example as bearing inner race, and the axial positioning structure of bearing realizes from the other end locking gear.This kind of structure is the most common, but overall structure relative complex, axial part is relatively many, and interrelated, and the impact of being expanded with heat and contract with cold is larger.

The axial and circumferential location of being locked by the type of interference for another example and coordinate the shaft shoulder simultaneously to realize part is fixed, and structure is simple, but larger to the intensity effect of axle.

Mechanical industry is the technical field started to walk comparatively early, and the history of existing thousands of years, the standardization of its basic component is far ahead of other technologies field.The position structure of axial part is generally such as mechanical design handbook institute regulation, breaks through existing position structure very difficult under the condition of prior art extreme enrichment, and rarely seen have new parts on shaft position structure to occur.Several years only have minority position structure to occur, such as, use the interference fit joint that expansion set realizes.

Model utility content

In view of this, the purpose of this utility model is the new parts on shaft position structure that provides a kind of plyability stronger.

The technical solution adopted in the utility model is:

According in embodiments more of the present utility model, a kind of parts on shaft position structure, comprising:

First part first end positioning part;

First part second end positioning part, this first part second end positioning part comprises corresponding first part second end and has the second key pin groove, and the key pin that is matched with this second key pin groove, and this key pin holds out against the first part second end;

Second part circumference positioning part, this second part circumference positioning part is configured to have the keyway with key pins at its hub bore;

Second part axial positioning and locking portion, this second part axial positioning and locking portion is included in radial direction on the second part keyway position and has top wire hole, and coordinates with this top wire hole and compress the jackscrew of key pin.

In certain embodiments, described second part axial positioning and locking portion has also additionally arranged auxiliary tight lock part, and this auxiliary tight lock part comprises the auxiliary top wire hole arranged about the axis for axis symmetry of axle with described top wire hole, and the auxiliary jackscrew coordinated with auxiliary top wire hole.

Alternatively, described auxiliary tight lock part also comprises and is opened in the second part and a pair assistant reinforcement top wire hole on the radial line of the axis vertical take-off of described jackscrew and corresponding assistant reinforcement jackscrew;

Two assistant reinforcement jackscrew coaxial lines, and the axes intersect of its axis and jackscrew, thus two assistant reinforcement jackscrews are opposed on the second part.

Alternatively, described first part is bearing, and correspondingly, the first part first end positioning part comprises:

Bore;

Cover type jump ring, the described bearing of interior card, and the cylindricality gabarit of this cover type jump ring and described bore form shaft hole matching, and snap in mouth at the bearing of cylindricality gabarit and be provided with flange, thus flange coordinates with bore outer rim and forms axially locating;

Correspondingly, key pin holds the inner ring of bearing.

Alternatively, described bore comprises the bearing support part be formed in respective holder and the upper cover sealing bearing support part from upside.

Alternatively, described bearing support part is the U-type groove be made up of the semi-cylindrical of bottom and the facade on top, and the height of its neutral surface is equal with the radius of semi-cylindrical;

Correspondingly, upper cover is plate pressing plate and tangent with cover type jump ring.

Alternatively, the center of described pressing plate have for the center hole of tight sleeve type jump ring and coordinate with center hole hold out against screw.

Alternatively, one end that the second part is adjacent with the first part is the second part first end, and the other end is the second part second end;

The axle of the second side, part second end place has the first key pin groove, coordinates corresponding key pin to locate for the circumference of the 3rd part;

Sleeve or the 3rd part hub portion outstanding to the second part is adopted to realize locating between 3rd part and the second part.

Alternatively, the 3rd part is different from the employing jump ring location, one end of the second part.

According to embodiments more of the present utility model, a kind of parts on shaft position structure, comprising:

First part first end positioning part;

First part second end positioning part, this first part second end positioning part comprises the second key pin groove of axially through whole axle, and the key pin that is matched with this second key pin groove, and this key pin holds out against the first part second end;

Second part circumference positioning part, this second part circumference positioning part is configured to have the keyway with key pins at its hub bore;

Second part axial positioning and locking portion, this second part axial positioning and locking portion is included in radial direction on the second part keyway position and has top wire hole, and coordinates with this top wire hole and compress the jackscrew of key pin.

According to the utility model, the locating assembly of key pin and key forms driving key while carrying out that a part is circumferential and locating, and forms backing pin again, thus carries out axially locating to another part; Realize the locking of key pin by jackscrew again and realize a part axial locking, this jackscrew forms locking to another part again simultaneously.Based on this, position structure adopts the function of compound, not only make position structure compacter, and reliability of positioning does not also reduce.

Accompanying drawing explanation

Fig. 1 is according to the assembly structure schematic diagram of parts on shaft position structure of the present utility model on transmission module.

Fig. 2 is axial Assembly of the parts structural representation.

Fig. 3 is parts on shaft one-sided configuration incomplete decomposing schematic diagram.

Fig. 4 is parts on shaft one-sided configuration assembly structure schematic diagram.

Fig. 5 is week upper part one-sided assembly structure schematic diagram on support.

In figure: 1. servomotor, 2. support, 3. delivery wheel, 4. reinforcing bar, 5. transmission shaft, 6. synchronous pulley, 7. Timing Belt, 8. bearing unit, 9. key pin.

21. screws, 22. unthreaded holes, 23. pressing plates, 24. bore, 25. tapped holes.

51. first key pin grooves, 52. second key pin grooves, 53. jump-ring slots.

61. top wire holes, 62. hub bores, 63. keyways, 64. top wire holes.

81. bearings, 82. cover type jump rings, 83. bearing inner races.

Embodiment

Should be appreciated that about axle system and structural design thereof, unless specifically stated otherwise, in the utility model, axially, radial and circumference reference system based on " axle " all.It is evident that, " axle " here should be " axle " in parts on shaft.

Except the position structure of the axle specialized except the utility model, parts on shaft axial fixing structure and method, parts on shaft circumference fixed structure and method all can adopt known locations structure and method.

Should be appreciated that parts on shaft is except driving component, such as gear, belt wheel, friction wheel etc., also should comprise such as supporting element, such as bearing, therefore, also can be applied to the location of other parts on shaft except driving component according to embodiment of the present utility model and fix.

In the application shown in Fig. 1, it is a kind of transmission modular structure of underloading, axle in figure is transmission shaft 5, have four, in figure, parts on shaft mainly contains synchronous pulley 6, delivery wheel 3 and the bearing unit shown in Fig. 28, carries out the description of parts on shaft position structure as example, foreseeable, based on this, can be applied in the parts on shaft location with similar orientation type.

First, refer in Figure of description 1, Fig. 1, the simple loading analysis of parts on shaft:

First be the synchronous pulley that servomotor 1 output shaft connects form the transmission of power of synchronous belt drive mechanism, synchronous pulley needs can not produce axial float on installed transmission shaft, and need to transmit certain torque, nature, corresponding transmission shaft needs to overcome certain moment of torsion and moment of flexure, and corresponding transmission shaft needs to have certain antitorque and shear resistance 5 in other words.Therefore, slackening transmission shaft 5 strength and stiffness should be reduced.

The orientation type of other synchronous pulleys 6 is substantially identical.

The mounting point of bearing unit 8 on transmission shaft 5 is commonly referred to as axle journal according to Machine Design specification, bearing needs reliable two ends to locate, because its inner ring and transmission shaft 5 generally adopt interference fit, stiction between itself and transmission shaft 5, much larger than the kinetic force of friction of bearing moving element, does not therefore need the problem considering circumference location.

Also comprise the delivery wheel 3 of underloading in structure shown in Fig. 1, need to carry out location, two ends and circumference location to it.

Feature in Fig. 1 is, it is closer that parts on shaft leans on, thus according to the utility model, no matter possess the technical specifications of the public locating piece of compound, be the location of two parts or the location of three parts.

Generally speaking, the driving parts of parts on shaft, such as synchronous pulley 6 is the guaranteed parts in position, and such as bearing unit 8 is then the part ensureing other part position precision.For this reason, bearing unit 8 is defined as the first part, can be understood as is the basis of other Assembly of the parts.

See Figure of description 1-5, the first orientation type is first described.

Figure middle (center) bearing assembly 8 forms the first part, and bearing is located its one end in the inner part and generally adopted the shaft shoulder or axle collar location, also likely adopts such as axle sleeve to position in some implementations.

Should be appreciated that inner side refers to Figure of description 1 here, in being, otherwise is outward towards the direction of support 2 inner space.

The inside one end of bearing unit orientates first end as, and outside one end orientates the second end as, and bearing second end generally adopts bearing (ball) cover to position, and bearing (ball) cover is generally bolted on support 2.

In certain embodiments, the inner of bearing 81 in other words first end can adopt conventional orientation type, the such as shaft shoulder, the axle collar or sleeve, and this structure adopts such as multidiameter shaft ratio to be easier to realize, and does not repeat them here.

In the structure shown in Fig. 3, the position structure of the outer end of bearing 81 second end in other words can present more clearly.In Fig. 3, transmission shaft 5 is an optical axis, does not consider the location, inner side of bearing 81, first sees outside it, i.e. the second end.In figure, transmission shaft 5 has the second key pin groove 52 in the outside (with support 2 for inside and outside reference system) of bearing, and the key pin 9 that is matched with this second key pin groove 52, and this key pin 9 now forms backing pin and holds out against the inner ring of bearing 81.

As previously mentioned, between bearing 81 and transmission shaft 5, usually adopt interference fit joint, self there is certain linking intensity.Key pin 9 and the second key pin groove 52 also adopt interference fit joint usually, have certain retaining ability.

Be different from the Flat dey joint in mechanical transmission, the two round end flat key in Flat dey joint and the surrounding of corresponding keyway (straight trough) are interference fit relation.In the structure shown in Fig. 3, key pin 9 coordinates mainly two sides with the second key pin groove 52, and can all reserve certain space at the two ends of key pin 9, the assembling degrees of freedom of bearing 81 is very large.

In Fig. 3-Fig. 5, the part adjacent with bearing is synchronous pulley 6, and synchronous pulley needs two location of axial and circumferential.

The general structure of synchronous pulley 6 is that wheel hub contains a hub bore 62 with a wheel hub or a dish made in one piece.Synchronous pulley 6 generally adopts driving key to connect with transmission shaft 5, and therefore, its hub bore 62 is also provided with a keyway 63.

Generally speaking, the wheel hub of synchronous pulley 6 and the width of synchronous pulley 6 wheel body are (in parts on shaft, what axially limit measures as width, such as, the facewidth in gear is typical example) identical, in some applications, the width of its wheel hub is larger than wheel body width, generally can as the part be axially located.

Synchronous pulley 6 is as the second part, and its circumferential positioning part is configured to have at its hub bore 62 keyway 63 coordinated with key pin 9, thus key pin 63, as backing pin, positions the outer end of bearing 81, forms circumference location again as driving key to synchronous pulley 6.

Second part also can adopt the axial positioning structure of compound, adopts simple positioning and locking mode in some embodiments.As in Figure 3-5, synchronous pulley 6 has radial top wire hole 61, and especially in the position at its keyway 63 place, based on this structure, when jackscrew 64 is tightened, jackscrew 64 can be pressed on key pin 9, thus forms locking, utilizes frictional force to form axially locating and locking.

In addition, jackscrew 64 has also locked key pin 9 simultaneously further.

In order to clear display jackscrew 64 in figure, have employed different ratio display jackscrews 64, jackscrew 64 and top wire hole 61 adopt the scale of 2:1.

Because synchronous pulley 6 is mainly used to transmitting torque, adapt, the trimming moment mainly moment of torsion that transmission shaft 5 pairs of synchronous pulleys 6 provide.Simultaneously also containing turning torque, it is also moment of torsion.Therefore, synchronous pulley 6 realizes circumference location by key pin 9.

In addition the coaxality between synchronous pulley 6 and transmission shaft 5 requires not high, and therefore, single jackscrew 64 meets the technical requirements of its circumference location and axially locating locking.

What first ensure required for synchronous pulley 6 is transmission accuracy, and above-mentioned coaxality is naturally more high better, but the cost realizing high-precision coaxial degree is unsuitable excessive.

In certain embodiments, the jackscrew 64 corresponding with the second key pin groove 52 is clearly demonstrated in figure, when jackscrew 64 holds out against key pin 9, the synchronous pulley 6 of the key pin side that synchronous pulley 6 is stressed and make is relatively large with the matching gap of transmission shaft 5, relative side matching gap is relatively little, thus causes coaxiality error to become large.

For this reason, auxiliary top wire hole (not shown) is also had as the side that the synchronous pulley 6 of the second part is relative with key pin 9, this auxiliary top wire hole and top wire hole 61 are arranged about the axis for axis symmetry of transmission shaft 5, the holding out against transmission shaft 5 of relative equilibrium can be formed, thus ensure the coaxality of transmission shaft 5 and synchronous pulley 6.

It is solid that auxiliary jackscrew and jackscrew 64 can adopt torque spanner to realize twisting of equilibrant.

It is not only the coaxality ensureing that synchronous pulley 6 coordinates with transmission shaft 5 that the contraposition of auxiliary jackscrew and jackscrew 64 coordinates, and the Double Tops silk structure that contraposition is arranged can provide better linking intensity.

Visible in Fig. 4 and Fig. 5, except indicated top wire hole 61, and outside previously described auxiliary top wire hole, also containing other top wire holes in top wire hole 61 axis side.Other top wire hole and jackscrew joined together further enhancing linking intensity, are called assistant reinforcement top wire hole, and jackscrew joined together is called assistant reinforcement jackscrew.

Visible in Fig. 4 and Fig. 5, the axis of assistant reinforcement jackscrew and the axes normal of jackscrew 64.

Thus, four jackscrews can form the locking of effective circumferential and axial.

Two assistant reinforcement jackscrew contrapositions are arranged, thus axis is identical, in order to obtain good stress condition, and the axis of two assistant reinforcement jackscrews and the axes intersect of jackscrew 64.

By said structure, parts on shaft be have employed to location and the locking structure of compound, for the location of parts on shaft and locking provide new technique direction.

Parts on shaft kind and specification are relatively many, about applicable object best in the present embodiment, preferably one end has the part of good location base, one end of such as part adopts shaft shoulder location, so it can be used as the first part to adopt the orientation type in the present embodiment to have good locating effect.Location between such as, multiple gears on gear shaft except adopting except the shaft shoulder, the axle collar and sleeve, can also to adopt described in the utility model and position structure.

As Figure 1-5, based on be bearing 81 by the part of locating, for bearing 81, provide a kind of specific position structure in certain embodiments, its adopts annex to coordinate support 2 to realize location.

In the structure shown in Fig. 5, be provided with a bore 24, for installation shaft bearing assembly 8.Bore 24, in machinery, general special spindle bearing hole (Bearingseathole), for bearing provides running basis, the mounting point coordinated with bearing precision.

In these embodiments, bearing 81 is not directly installed in bore 24, but existing cover cover type jump ring 82, cover type jump ring 82 is external members of a tubular, the outer ring of the inward flange holding bearing 81 formed by in-flanges bottom it, oral area then has the outward flange that flanging is formed.

Based on the said structure of cover type jump ring 82, cover is embedded with described bearing 81, forms the structure being analogous to bearing saddle bore.The inner core of cover type cutting ferrule needs to match with the cylinder of bearing 81 outer ring, and thus, the body of cover type jump ring 82 is cylindrical structures, and thus it has the gabarit of cylindricality, and this gabarit and described bore 24 form shaft hole matching structure.

The oral area of cover type jump ring 82 is formed with outward flange, and when the body of cover type jump ring 82 coordinates with bore 24, outward flange is greater than the radial dimension of bore 24, thus cannot move to the other end, forms axially locating.

In the structure shown in Fig. 3, visible, key pin 9 holds the inner ring of bearing 81, and inner ring belongs to quiet parts, holds location by key pin 9, and at axial locking.

About the formation of bearing saddle bore, simply can be configured to a circular hole, and directly output on the wall of support 2.

In certain embodiments, for adapting to the condition of heavy duty, the position at bore 24 place needs to strengthen, and widens bore 24, thus is greater than the thickness of support 2 sidewall, gives prominence to the part with sidewall, arranges stiffening rib.

In the application adapting to heavy duty, bore 24 is configured to circular hole, and is divided into upper and lower two parts, and each part is semi-circular structure, and upper and lower two parts by bolts assemblies together.Wherein, part below directly processes on support 2, and part above forms cap, is connected, be beneficial to maintenance by such as aforesaid bolt.

In the application of some underloadings, in such as, delivery wheel 3 system shown in Fig. 1, bore 24 is processed to the relative simple form of a kind of structure, thus described bore 24 comprises the bearing support part be formed in respective holder 2 and the upper cover sealing bearing support part from upside.

Wherein, described bearing support part is the U-type groove be made up of the semi-cylindrical of bottom and the facade on top, and the height of its neutral surface is equal with the radius of semi-cylindrical.

So correspondingly, upper cover is plate pressing plate 23 and tangent with cover type jump ring 82, and as shown in Figure 5, pressing plate 23 is arranged on support 2 by screw 21, and what formed bearing unit 8 is reliable fixing.In figure, screw 21 adopts relatively large scale, to react assembly structure clearly.

Further, in order to improve fixing reliability, the center of described pressing plate 23 have for the center hole (not shown) of tight sleeve type jump ring 82 and coordinate with center hole hold out against screw (not shown), thus after having assembled pressing plate 23, tighten and hold out against screw, formed and fix more reliably.

In the structure shown in Fig. 3, also comprise a key pin groove, i.e. the first key pin groove 51, thus, axially locating can be carried out to synchronous pulley 6, and the first key pin groove 51 can also as the circumferential locating piece of the 3rd part, such as, delivery wheel 3 shown in Fig. 1.The key pin that first key pin groove 51 is namely joined together thus forms double-action locating piece.

Two key pin grooves, namely the first key pin groove 51 and the second key pin groove 52 can tandem be arranged, and are beneficial to processing and assembling.

In certain embodiments, the first key pin groove 51 and the second key pin groove 52 adopt and shift to install, and can avoid slackening excessive to transmission shaft 5 local strength.

In certain embodiments, sleeve or the 3rd part hub portion outstanding to the second part is adopted to realize locating between the 3rd part and the second part.

In structure shown in transit 3, the axle head of transmission shaft 5 also has jump-ring slot 53, and jump ring can be used to be formed the 3rd part, the namely axially locating of delivery wheel 3 and locking in figure.

In certain embodiments, key pin groove can only open one, and through in the axis of transmission shaft 5, is applicable in the application of underloading, has larger intensity to slacken, but have greater flexibility for the assembling of parts on shaft to transmission shaft 5.

Claims (10)

1. a parts on shaft position structure, is characterized in that, comprising:

First part first end positioning part;

First part second end positioning part, this first part second end positioning part comprises corresponding first part second end and has the second key pin groove (52), and the key pin (9) that is matched with this second key pin groove (52), and this key pin (9) holds out against the first part second end;

Second part circumference positioning part, this second part circumference positioning part is configured to have at its hub bore (62) keyway (63) coordinated with key pin (9);

Second part axial positioning and locking portion, this second part axial positioning and locking portion is included in radial direction on the second part keyway (63) position and has top wire hole (61), and coordinates with this top wire hole (61) and compress the jackscrew (64) of key pin (9).

2. parts on shaft position structure according to claim 1, it is characterized in that, described second part axial positioning and locking portion has also additionally arranged auxiliary tight lock part, this auxiliary tight lock part comprises the auxiliary top wire hole arranged about the axis for axis symmetry of axle with described top wire hole (61), and the auxiliary jackscrew coordinated with auxiliary top wire hole.

3. parts on shaft position structure according to claim 2, it is characterized in that, described auxiliary tight lock part also comprises a pair assistant reinforcement top wire hole on the radial line of the axis vertical take-off being opened in the second part and described jackscrew (64) and corresponding assistant reinforcement jackscrew;

Two assistant reinforcement jackscrew coaxial lines, and the axes intersect of its axis and jackscrew (64), thus two assistant reinforcement jackscrews are opposed on the second part.

4., according to the arbitrary described parts on shaft position structure of claim 1-3, it is characterized in that, described first part is bearing (81), and correspondingly, the first part first end positioning part comprises:

Bore (24);

Cover type jump ring (82), the described bearing of interior card (81), and the cylindricality gabarit of this cover type jump ring (82) and described bore (24) form shaft hole matching, and snap in mouth at the bearing (81) of cylindricality gabarit and be provided with flange, thus flange coordinates with bore outer rim and forms axially locating;

Correspondingly, key pin (9) holds the inner ring of bearing (81).

5. parts on shaft position structure according to claim 4, is characterized in that, described bore (24) comprises the bearing support part be formed in respective holder (2) and the upper cover sealing bearing support part from upside.

6. parts on shaft position structure according to claim 5, is characterized in that, described bearing support part is the U-type groove be made up of the semi-cylindrical of bottom and the facade on top, and the height of its neutral surface is equal with the radius of semi-cylindrical;

Correspondingly, upper cover is plate pressing plate (23) and tangent with cover type jump ring (82).

7. parts on shaft position structure according to claim 6, is characterized in that, the center of described pressing plate (23) have for the center hole of tight sleeve type jump ring (82) and coordinate with center hole hold out against screw.

8., according to the arbitrary described parts on shaft position structure of claims 1 to 3, it is characterized in that, one end that the second part is adjacent with the first part is the second part first end, and the other end is the second part second end;

The axle of the second side, part second end place has the first key pin groove (51), coordinates corresponding key pin to locate for the circumference of the 3rd part;

Sleeve or the 3rd part hub portion outstanding to the second part is adopted to realize locating between 3rd part and the second part.

9. parts on shaft position structure according to claim 8, is characterized in that, one end that the 3rd part is different from the second part adopts jump ring location.

10. a parts on shaft position structure, is characterized in that, comprising:

First part first end positioning part;

First part second end positioning part, this first part second end positioning part comprises the second key pin groove (52) of axially through whole axle, and the key pin (9) that is matched with this second key pin groove (52), and this key pin (9) holds out against the first part second end;

Second part circumference positioning part, this second part circumference positioning part is configured to have at its hub bore (62) keyway (63) coordinated with key pin (9);

Second part axial positioning and locking portion, this second part axial positioning and locking portion is included in radial direction on the second part keyway (63) position and has top wire hole (61), and coordinates with this top wire hole (61) and compress the jackscrew (64) of key pin (9).