CN206754138U - A kind of chain and its directive wheel - Google Patents

Abstract

The utility model provides a kind of chain and its directive wheel, directive wheel can be lubricated in the case where not dismantling, improve operating efficiency, reduce labor intensity.Directive wheel of the present utility model is included with the bearing holder (housing, cover) of its outer ring and chain interoperation, the clutch shaft bearing being oppositely arranged in the bearing holder (housing, cover) and second bearing, and axially penetrate through the clutch shaft bearing and the locking member of the second bearing, the locking member is provided with interconnected radial hole and axial hole, the radial hole connects with the clutch shaft bearing and the second bearing, the axial hole is provided with installation portion, for installing the filling part of lubricating oil.Lubrication can be achieved in the case where not dismantling directive wheel for the utility model, relative to one by one dismantle directive wheel after be lubricated, reduce labor intensity, improve operating efficiency, avoid because directive wheel cannot lubricate and worn chain for a long time, the faster environment of the lubrication oil consumption such as the high temperature that is particularly suitable for use in.

Description

A kind of chain and its directive wheel

Technical field

Art drive systems field is the utility model is related to, more particularly to a kind of chain and its directive wheel.

Background technology

Chain is used as machine driving, traction more, and in producing region, chain is all to be driven to do ring-type fortune by two gears Dynamic, one of gear is driving wheel, and another gear is driven pulley.And passed in Painting Shop, the ground chain of generally use Dynamic, the ground chain is different from the chain of producing region, and it is in irregular cyclic motion that it drives whole chain by a driving station.This When, many bends are there will necessarily be during whole cyclic motion, chain just needs to set directive wheel in corner.Directive wheel will Realize needs bearing with rotating against for chain, and the lubrication of bearing is just into a technical problem urgently to be resolved hurrily.

In the prior art, the working environment residing for directive wheel is usually the baker spent 170 more, and lubricating oil is easy to be baked It is dry.And when being lubricated in the prior art to directive wheel, it is necessary to be directed to wheel dismounting first, added lubricating oil to pacify again again afterwards Dress, wastes time and energy.

Therefore, a kind of chain of design and its directive wheel are needed badly, to realize the lubrication of directive wheel in the case where not dismantling.

Utility model content

The purpose of this utility model is to provide a kind of chain and its directive wheel, can be in the case where not dismantling to directive wheel It is lubricated, improves operating efficiency, reduces labor intensity.

To achieve the above object, the utility model provides a kind of directive wheel of chain, including is matched somebody with somebody with its outer ring with chain The bearing holder (housing, cover) of conjunction, the clutch shaft bearing being oppositely arranged in the bearing holder (housing, cover) and second bearing, and axially penetrate through the first axle Hold the locking member with the second bearing, the locking member is provided with interconnected radial hole and axial hole, the radial hole with The clutch shaft bearing connects with the second bearing, and the axial hole is provided with installation portion, for installing the filling part of lubricating oil.

Directive wheel of the present utility model, interconnected radial hole and axial hole are set on locking member, and axial hole is just Installation portion is set in the position of installation filling part, so that operating personnel are by the installation of installation portion realization filling part, and then not Lubricating oil is injected in axial hole in the case of dismantling directive wheel；Then, axial hole extends to clutch shaft bearing and second bearing institute Axial location, and then the connection with clutch shaft bearing and second bearing is realized by radial hole, to form axially and radially phase Logical oil leab so that lubricating oil via filling part injection axial hole after, flow to vertically to clutch shaft bearing and the second axle Corresponding position is held, then clutch shaft bearing and second bearing are reached via radial hole, clutch shaft bearing and second bearing are moistened It is sliding.

It can be seen that the utility model is not dismantling the situation of directive wheel by the radial hole and axial hole set by locking member It is lower to can be achieved to clutch shaft bearing in directive wheel and the lubrication of second bearing, with being carried out after dismantling directive wheel one by one in the prior art Lubrication is compared, and largely reduces labor intensity, improves operating efficiency, simplifies lubricating process；The axle of locking member Installation portion is provided with to hole, filling part directly can be installed on the installation portion, can prevent dust from entering, improve lubricating oil and add The convenience of note；Especially since not dismantling directive wheel can be achieved lubrication, also just without just entering until stopping production to directive wheel Row is safeguarded, can add lubricating oil in time as needed, to ensure the reliable fit between chain and directive wheel, is avoided because being oriented to Wheel cannot lubricate and worn chain for a long time, improve the use reliability of directive wheel and chain, extend service life, especially It is applied to the faster environment of lubrication oil consumption such as high temperature.

Alternatively, the first bushing of the inner ring in addition to located at the clutch shaft bearing, and located at the second bearing Second bushing of inner ring, the locking member axially penetrate through first bushing and second bushing, the radial hole with it is described The inner chamber of first bushing or second bushing connects, and by between the axial direction between first bushing and second bushing Gap connects with the clutch shaft bearing and the second bearing.

Alternatively, in addition to spacer, axial barrier are described between the clutch shaft bearing and the inner ring of the second bearing The opposite end of first bushing and second bushing is inserted in by the both ends of the spacer respectively；The spacer, which is provided with, radially to be penetrated Hole, so as to by the axial gap between first bushing and second bushing and the clutch shaft bearing and the second bearing Connection.

Alternatively, the spacer is provided with the radial direction through hole of the circumferentially-spaced distribution of two or more.

Alternatively, the radial direction through hole is two-by-two one over the ground in the diametrically setting of the spacer.

Alternatively, the outer end of first bushing is provided with the first radially projecting flange, with axial compression in described first The outer end of bearing；

And/or the outer end of second bushing is provided with the second radially projecting flange, with axial compression in second axle The outer end held.

Alternatively, in addition to axial barrier is first dust-proof between first flange and the outer end of the clutch shaft bearing Circle；

And/or in addition to axial barrier it is second dust-proof between second flange and the outer end of the second bearing Circle.

Alternatively, the bearing holder (housing, cover) is additionally provided with the inner edge portion of radially projecting setting, with axial barrier in the clutch shaft bearing Between the outer ring of the second bearing.

Alternatively, the axial hole is by insertion among the locking member to the head end of the locking member, the installation portion At the head end port of the axial hole.

Alternatively, the head end of the locking member is provided with the external screw thread of predetermined axial length, is used to axially press with threaded connection The compressing member of the tight clutch shaft bearing and the second bearing.

The utility model additionally provides a kind of chain, and the guiding of corner is carried out by above-mentioned directive wheel.

Alternatively, in addition to two or more is in the spaced support wheel of length direction of the chain, each support Wheel is supported in the bottom of the chain, and the directive wheel is coordinated with the medial surface of the outer ring of the bearing holder (housing, cover) and the chain.

Brief description of the drawings

Fig. 1 provides a kind of dimensional structure diagram of the directive wheel in embodiment by the utility model；

Fig. 2 is the shaft side figure of directive wheel shown in Fig. 1；

Fig. 3 is the dimensional structure diagram of locking member in directive wheel shown in Fig. 2；

Fig. 4 is the shaft side figure of locking member shown in Fig. 3；

Fig. 5 is the dimensional structure diagram of the first bushing in directive wheel shown in Fig. 2；

Fig. 6 is the dimensional structure diagram of spacer in directive wheel shown in Fig. 2；

Fig. 7 is the dimensional structure diagram of directive wheel centre bearer bush shown in Fig. 2.

In Fig. 1-7：

Bearing holder (housing, cover) 1, inner edge portion 11, clutch shaft bearing 2, second bearing 3, locking member 4, radial hole 41, axial hole 42, installation portion 43rd, compressing member 44, filling part 5, the first bushing 6, the first flange 61, sleeve part 62, the second bushing 7, the second flange 71, spacer 8, Radial direction through hole 81, the first dust ring 9, the second dust ring 10.

Embodiment

The utility model provides a kind of chain and its directive wheel, directive wheel can be moistened in the case where not dismantling It is sliding, operating efficiency is improved, reduces labor intensity.

Below in conjunction with accompanying drawing, the utility model is specifically introduced, so as to this reality of those skilled in the art's accurate understanding With new technical scheme.

Axial direction, circumference and radial direction as described herein are using directive wheel as reference, using the rotation direction of directive wheel to be circumferential, to lead It is axial direction to the bearing of trend of the rotary shaft of wheel, using the diameter bearing of trend of directive wheel as radially.

First, second grade word as described herein is only used for the same or similar more than two parts of specification configuration, or Same or similar more than two structures, do not indicate that the particular determination to order.

Really as stated in the Background Art, chain is in irregular cyclic motion in use, is now just needed in bend Position sets directive wheel to be oriented to chain.Due to such case in ground chain it is relatively conventional, therefore herein enter by taking ground chain as an example Row explanation, but it will be understood by those skilled in the art that ground chain is only a kind of concrete form, chain uses in use The situation that directive wheel is oriented to is not limited in ground chain, can also be applied to other fields for needing to be oriented to using directive wheel Close.

When chain is specially ground chain, directive wheel can be located at the medial surface of chain, and can extend perpendicular to ground, ground Chain can do cyclic motion in the horizontal plane perpendicular to directive wheel.

As depicted in figs. 1 and 2, the utility model provides a kind of directive wheel of chain, including bearing holder (housing, cover) 1, clutch shaft bearing 2nd, second bearing 3 and locking member 4, wherein, clutch shaft bearing 2 and second bearing are mounted in bearing holder (housing, cover) 1 for 3 set 1, and are oppositely arranged, and are located In the axial both ends of bearing holder (housing, cover) 1；Locking member 4 axially penetrates through clutch shaft bearing 2 and second bearing 3, for realizing to the He of clutch shaft bearing 2 The axial locking positioning of second bearing 3, clutch shaft bearing 2 and second bearing 3 are supported in the axial both ends of locking member 4, and cause lock It can tightly be relatively rotated between part 4 and bearing holder (housing, cover) 1；Chain can be led with realizing with chain interoperation the outer ring of bearing holder (housing, cover) 1 To.

In the utility model, locking member 4 is provided with interconnected radial hole 41 and axial hole 42, radial hole 41 and first axle 2 are held to connect with second bearing 3；Axial hole 42 is provided with installation portion 43, and for installing the filling part 5 of lubricating oil, axial hole 42 is substantially Axially extend, one end extend to be easily installed filling part 5 position, in order to install filling part 5 after inject lubricating oil, it is another End is axially extended to the position corresponding with clutch shaft bearing 2 and second bearing 3；Then, axial hole 42 passes through radial hole 41 again Connected with clutch shaft bearing 2 and second bearing 3, and then lubricating oil is introduced into the He of clutch shaft bearing 2 via axial hole 42 and radial hole 41 Second bearing 3, the position of the needs such as the ball of two bearings lubrication is lubricated.

Directive wheel of the present utility model, interconnected radial hole 41 and axial hole 42 are set by locking member 4, will be lubricated Oil introduces clutch shaft bearing 2 to be lubricated and second bearing 3, lubrication can be achieved without dismounting, with being directed to take turns in the prior art It is lubricated and compares after dismantling one by one, largely improves simple operation, simplify operating procedure, improve operation Efficiency, largely reduce labor intensity., can be relative because axial hole 42 is provided with the installation portion 43 of filling part 5 The filling of oil is lubricated in the environment of sealing, prevents from entering dust in filling process.Especially, the utility model realizes Direct lubrication of the directive wheel in the case of not dismantling so that those skilled in the art can add lubricating oil in time as needed, Without waiting for carrying out intermittent oiling after stopping production, and then the normal operation of directive wheel is ensure that, holding forms reliable and stable with chain Cooperation, avoid chain wear, the faster environment of the lubrication oil consumption such as the high temperature that is particularly suitable for use in.

As shown in Figure 3 and Figure 4, axial hole 42 can by the centre of locking member 4 axially through the head end to locking member 4, And it is possible to installation portion 43 is arranged at the head end port of axial hole 42.Now, installation portion 43 is in the head end of axial hole 42 At port, as the head end of locking member 4, filling part 5 is installed in the installation portion 43, substantially will not be with the agent structure of directive wheel Interfere, be easy to fill the installation and removal of part 5, improve simple operation.

Locking member 4 of the present utility model, axial hole 42 is extended into head end by centre, so as to form installation portion in head end 43, realize the installation of filling part 5, on the one hand, realize that the installation and removal of filling part 5 are more convenient in head end；On the other hand, axle The centre of locking member 4 can be extended in the axial direction to hole 42, because clutch shaft bearing 2 and second bearing 3 are oppositely arranged, and be in The position corresponding with the both ends of locking member 4, when axial hole 42 extends to centre, lubricating oil can be effectively delivered into One bearing 2 and second bearing 3, for both lubrications, the effective conveying and distribution to lubricating oil are realized, avoids the occurrence of local profit Cunning is not in place.

Wherein, centre is for the both ends of axial direction, refers to spread one to both ends with the midpoint of the axial direction of locking member 4 The intermediate region that set a distance is formed.For ease of description, the axial both ends of locking member 4 are respectively defined as head end and end, wherein One end is the head end of locking member 4, is for end, the structure of head end is relatively easy, it is not necessary to by the end Bear or apply axial lock clamp force.

The structure type of locking member 4 is various, and in the present embodiment, locking member 4 is specifically as follows tie down screw, the spiral shell of the screw rod One end residing for head is referred to as its head end, and the other end is provided with nut, referred to as end.

External screw thread can be provided with the head end of locking member 4, the external screw thread extends certain length in the axial direction, that is, has predetermined Axial length；The compressing member 44 coordinated with locking member 4 can be set, specifically the compressing member 44 and external screw thread can be subjected to screw thread Connection, when end precession of the compressing member 44 towards locking member 4, it can be realized with axial compression clutch shaft bearing 2 and second bearing 3 Clutch shaft bearing 2 and the positioning of the axial locking of second bearing 3.

The structure type of installation portion 43 is various, can be specifically configured according to the structure type of filling part 5, such as can be Helicitic texture or bayonet arrangement.In the present embodiment, installation portion 43 specifically could be arranged to be opened in the interior spiral shell of the head end of locking member 4 Line, drilled vertically by the head end end face of locking member 4, form a mounting hole, and in the inwall tapping of the mounting hole, formation Helicitic texture, as the installation portion 43, realize the connection with filling part 5.After the installation of part 5 is filled, the mounting hole is blocked, with Prevent dust from entering.

As shown in Fig. 2 the utility model can also include the first bushing 6 and the second bushing 7, the first bushing 6 is located at first The inner ring of bearing 2, the second bushing 7 is located at the inner ring of second bearing 3, during installation, locking member 4 can be axially penetrated through into the first bushing 6 and second bushing 7, with

Realize the rotation connection of clutch shaft bearing 2 and locking member 4, and second bearing 3 and the rotation connection of locking member 4；Together When, the radial hole 41 of locking member 4 can be arranged on the position corresponding with the first bushing 6 or the second bushing 7, to cause radial hole 41 connect with the inner chamber of the first bushing 6 or the second bushing 7；Due to axial gap be present between the first bushing 6 and the second bushing 7, The axial gap diametrically extends certain distance, can extend radially outward to clutch shaft bearing 2 and second bearing 3 and connect Logical, then radial hole 41 passes sequentially through the axle between the inner chamber of the first bushing 6 or the second bushing 7, the first bushing 6 and the second bushing 7 To gap, realization connects with clutch shaft bearing 2 and second bearing 3, so as to which the lubricating oil injected in axial hole 42 is delivered into first Bearing 2 and second bearing 3.

Pass through the setting of the first bushing 6 and the second bushing 7, on the one hand, can realize to clutch shaft bearing 2 and second bearing 3 Inner ring support so that clutch shaft bearing 2 and second bearing 3 can circumferentially rotate with respect to locking member 4；On the other hand, the first lining The inner chamber of the bushing 7 of set 6 or second connects with radial hole 41, can not only form the flow channel of lubricating oil, can also convey The lubrication of itself is realized during lubricating oil.

First bushing 6 and the second bushing 7 can use the structure type of sleeve.As shown in figure 5, in a kind of set-up mode In, the first bushing 6 can include being set in the sleeve part 62 outside locking member 4 and the first flange located at the outer end of sleeve part 62 61, first flange 61 is radially provided projectingly by the outer face of sleeve part 62, so that when 4 axial locking of locking member, So that the axial compression of the first flange 61 is in the outer end of clutch shaft bearing 2, as shown in Figure 2.

Similarly, the second bushing 7 can use the structure type similar with the first bushing 6, i.e. the second bushing 7 can also include The sleeve part and the second flange 71 located at sleeve part outer end being set in outside locking member 4, the second flange 71 is by sleeve part Outer face is along mechanism to outstanding setting, with axial compression in the outer end of second bearing 3, as shown in Figure 2.

Because clutch shaft bearing 2 and second bearing 3 are oppositely arranged, the first bushing 6 and the second bushing 7 are also oppositely arranged, so as to Coordinate with locking member 4, axial locking clutch shaft bearing 2 and second bearing 3.

In addition, the utility model can also set the first dust ring 9 and the second dust ring 10, wherein, the first dust ring 9 can With axial barrier between the first flange 61 and the outer end of clutch shaft bearing 2, for preventing dust from being entered by the outer end of clutch shaft bearing 2 In directive wheel；Second dust ring, 10 axial barrier prevents dust by second between the second flange 71 and the outer end of second bearing 3 The outer end of bearing 3 enters in directive wheel, as shown in Figure 2.

The utility model is also provided with spacer 8, and the 8 axial barrier of spacer is in clutch shaft bearing 2 and the inner ring of second bearing 3 Between, the opposite end of the first bushing 6 and the second bushing 7 is inserted in spacer 8 by the both ends of spacer 8 respectively.Now, due to spacer 8 Axial barrier is between clutch shaft bearing 2 and the inner ring of second bearing 3, to provide the axial barrier of clutch shaft bearing 2 and second bearing 3 Power.

In the prior art, if locking member 4 provides larger coupling mechanism force to clutch shaft bearing 2 and second bearing 3, can be caused One bearing 2 and second bearing 3 are squeezed and influence the rotation of directive wheel；If coupling mechanism force is too small, the outer of directive wheel can be caused Clutch shaft bearing 2 and second bearing 3 between circle and inner ring produce axial float, and when chain movement, directive wheel application is rubbed Outer ring and the inner ring play, and then occur, to squeezing, to cause chain with the support wheel of ground chain in the axial direction of directive wheel can be caused by wiping power It is stuck.

For above-mentioned technical problem, the utility model is provided with spacer 8 between clutch shaft bearing 2 and second bearing 3, with axial direction Barrier provides a reaction to be contended with axial lock clamp force between clutch shaft bearing 2 and second bearing 3, and then for two bearings Power so that clutch shaft bearing 2 and second bearing 3 can still keep the reliability rotated in the case where bearing axial force.One side Face, the setting of spacer 8 can avoid clutch shaft bearing 2 and second bearing 3 rotated because bearing excessive axial force it is not smooth, prevent because Directive wheel rotation is not smooth and accelerates the abrasion of chain；On the other hand, after setting spacer 8, those skilled in the art can be according to need Increase the axial lock clamp force of locking member 4, avoid the outer ring of directive wheel play in the axial direction, and then improve directive wheel and chain Coordinate reliability so that chain is effectively driven, and prevents chain to be stuck.

In the utility model, the outer ring respective shaft bearing sleeve 1 of directive wheel, inner ring corresponds to the first bushing 6 and the second bushing 7.

Outer ring as described herein and inner ring refer to diametrically inside and outside, diametrically the circle of the axis away from directive wheel Enclose as outer ring, diametrically the circle close to the axis of directive wheel is inner ring.

Outer end as described herein and it is inner refer to inside and outside on axial direction, in the axial direction, the direction close to directive wheel midpoint is Interior, the direction away from directive wheel midpoint is outer.

At the same time, when provided with spacer 8, the axial gap between the first bushing 6 and the second bushing 7 is in spacer 8 Inner chamber in, i.e., the first bushing 6 and the second bushing 7 are sleeved in its inner chamber by spacer 8, so as to obstruct the first bushing 6 and The connection of the axial gap of two bushings 7 and clutch shaft bearing 2 and second bearing 3.Therefore, spacer 8 of the present utility model is additionally provided with footpath To through hole 81, for the axial gap between the first bushing 6 and the second bushing 7 to be connected with clutch shaft bearing 2 and second bearing 3 It is logical.

As shown in fig. 6, spacer 8 of the present utility model can be provided with more than two radial direction through holes 81, these are radially passed through Through hole 81 can be in the circumferentially-spaced distribution of spacer 8, so as to which lubricating oil to be preferably delivered to the circumference of spacer 8, to moisten Lubricating oil enters clutch shaft bearing 2 and second bearing 3 by circumferentially spaced more than two positions, improves distribution of the lubricating oil in circumference Uniformity.

Specifically, even number radial direction through hole 81 can be set so that radial direction through hole 81 is two-by-two one over the ground in spacer 8 Diametrically setting.That is, can be with a diameter of reference of spacer 8, at one of them diametric both ends of spacer 8 point Not She Zhi a radial direction through hole 81, a radial direction through hole 81 corresponds to another footpath in the diametric other end of spacer 8 To through hole 81.

When radial direction through hole 81 is diametrically set so that the lubricating oil on same circumference can be by position diametrically Put outflow and reach clutch shaft bearing 2 and second bearing 3, and then more equably enter in the circumference of clutch shaft bearing 2 and second bearing 3 Row lubrication；Lubricating oil can be delivered to roughly equal speed and roughly equal amount at radial direction through hole 81 diametrically, So as to improve lubricant effect.

In the embodiment shown in fig. 6, provided with four radial direction through holes 81, four radial direction through holes 81 are in cross friendship The position of fork, now, radial direction through hole 81 are uniformly distributed in the circumference of spacer 8, and then lubricating oil is circumferentially uniformly distributed to Clutch shaft bearing 2 and second bearing 3.

In addition, each radial direction through hole 81 set by spacer 8 may be on same circumference, different circles can also be in Zhou Shang, to cause radial direction through hole 81 to be distributed on the axial and circumferential of spacer 8, lubricating oil is improved on axial and circumferential Distributing homogeneity.Especially, when radial direction through hole 81 is on different circumference, radial direction through hole 81 is in different axles To position, now, a part of radial direction through hole 81 is closer to clutch shaft bearing 2, and a part of radial direction through hole 81 is closer to Two bearings 3, in clutch shaft bearing 2 and the rotation process of second bearing 3, lubricating oil is under the influence of centrifugal force via radial direction through hole , can be as much as possible to the lubricating oil into clutch shaft bearing 2 and second bearing 3 during 81 entrance clutch shaft bearing 2 and second bearing 3 Amount carries out balanced.

As shown in fig. 7, to realize the reliable location of clutch shaft bearing 2 and second bearing 3, bearing holder (housing, cover) 1 of the present utility model is also The inner edge portion 11 of radially projecting setting can be provided with, specifically by the radially projecting setting of inwall of bearing holder (housing, cover) 1, so as to the inner edge 11 axial barrier of portion between the outer ring of clutch shaft bearing 2 and second bearing 3, in order to by inner edge portion 11 in clutch shaft bearing 2 Axially position is carried out with the outer ring of second bearing 3.

There is provided the utility model chain above and its directive wheel is described in detail.It is used herein specifically individual Example is set forth to principle of the present utility model and embodiment, and the explanation of above example is only intended to help and understands this reality With new core concept.It should be pointed out that for those skilled in the art, the utility model is not being departed from On the premise of principle, some improvement and modification can also be carried out to the utility model, these are improved and modification also falls into this practicality In new scope of the claims.

Claims (12)

1. a kind of directive wheel of chain, including with the bearing holder (housing, cover) of its outer ring and chain interoperation (1), be oppositely arranged on the bearing holder (housing, cover) (1) clutch shaft bearing (2) and second bearing (3) in, and axially penetrate through the clutch shaft bearing (2) and the second bearing (3) Locking member (4), it is characterised in that the locking member (4) is provided with interconnected radial hole (41) and axial hole (42), described Radial hole (41) connects with the clutch shaft bearing (2) and the second bearing (3), and the axial hole (42) is provided with installation portion (43), for installing the filling part (5) of lubricating oil.

2. directive wheel as claimed in claim 1, it is characterised in that also include the of the inner ring located at the clutch shaft bearing (2) One bushing (6), and the second bushing (7) of the inner ring located at the second bearing (3), the locking member (4) axially penetrate through institute State the first bushing (6) and second bushing (7), the radial hole (41) and first bushing (6) or second bushing (7) inner chamber connection, and pass through the axial gap and described first between first bushing (6) and second bushing (7) Bearing (2) connects with the second bearing (3).

3. directive wheel as claimed in claim 2, it is characterised in that also including spacer (8), axial barrier is in the clutch shaft bearing (2) between the inner ring of the second bearing (3), the opposite end of first bushing (6) and second bushing (7) respectively by It is inserted at the both ends of the spacer (8)；The spacer (8) is provided with radial direction through hole (81), so as to by first bushing (6) and institute The axial gap stated between the second bushing (7) connects with the clutch shaft bearing (2) and the second bearing (3).

4. directive wheel as claimed in claim 3, it is characterised in that the spacer (8) is provided with the circumferentially-spaced distribution of two or more The radial direction through hole (81).

5. directive wheel as claimed in claim 4, it is characterised in that the radial direction through hole (81) two-by-two one over the ground it is described every Cover the diametrically setting of (8).

6. directive wheel as claimed in claim 2, it is characterised in that the outer end of first bushing (6) is provided with radially projecting First flange (61), with axial compression in the outer end of the clutch shaft bearing (2)；

And/or the outer end of second bushing (7) is provided with radially projecting the second flange (71), with axial compression in described The outer end of two bearings (3).

7. directive wheel as claimed in claim 6, it is characterised in that also including axial barrier in first flange (61) and institute State the first dust ring (9) between the outer end of clutch shaft bearing (2)；

And/or in addition to axial barrier it is second anti-between the outer end of second flange (71) and the second bearing (3) Konisphere (10).

8. directive wheel as claimed in claim 1, it is characterised in that the bearing holder (housing, cover) (1) is additionally provided with the interior of radially projecting setting Edge (11), with axial barrier between the outer ring of the clutch shaft bearing (2) and the second bearing (3).

9. the directive wheel as described in claim any one of 1-8, it is characterised in that the axial hole (42) is by the locking member (4) penetrated among to the head end of the locking member (4), the installation portion (43) and be located at the head end port of the axial hole (42) Place.

10. directive wheel as claimed in claim 9, it is characterised in that the head end of the locking member (4) is provided with predetermined axial length External screw thread, to be threadedly coupled the compressing member (44) for clutch shaft bearing (2) described in axial compression and the second bearing (3).

11. a kind of chain, it is characterised in that corner is carried out by the directive wheel described in the claims any one of 1-10 It is oriented to.

12. chain as claimed in claim 11, it is characterised in that also including two or more between the length direction of the chain Every the support wheel of setting, each support wheel is supported in the bottom of the chain, and the directive wheel is with the outer of the bearing holder (housing, cover) (1) The medial surface of circle and the chain coordinates.