阅读说明：本技术 防松组件、防松装置和挖掘机 (Retention device, locking device and excavator ) 是由 李春生 陈清红 姚金梅 魏巍 张少华 于 2019-09-12 设计创作，主要内容包括：本发明提供了一种防松组件、防松装置和挖掘机,涉及防松装置的技术领域。该防松组件包括第一垫圈和第二垫圈,第一垫圈的第二端面与第二垫圈的第三端面相配合,第二端面和第三端面中的一者设有台阶,另一者设有与台阶相匹配的凹槽,台阶自首端向尾端沿相应垫圈的周向延伸,且台阶的台面自首端向尾端向背离相应垫圈的方向倾斜设置；台阶为多个时,多个台阶自首端向尾端的旋向相同,凹槽也为多个,且多个凹槽与多个台阶一一对应。该防松装置包括待紧固件、螺栓和上述防松组件；该挖掘机包括上述防松装置。该防松组件能够对螺纹连接件起到防松效果,确保螺纹连接件的紧固作用。(The present invention provides a kind of retention device, locking device and excavators, are related to the technical field of locking device.The retention device includes the first washer and second packing ring, the second end face of first washer is matched with the third end face of second packing ring, one of second end face and third end face are equipped with step, another one is equipped with the groove to match with step, step is from head end caudad along the circumferentially extending of respective gasket, and the table top of step is caudad obliquely installed to the direction away from respective gasket from head end；When step is multiple, multiple steps are identical from the rotation direction of head end caudad, and groove is also multiple, and multiple grooves and multiple steps correspond.The locking device includes part, bolt and above-mentioned retention device to be tightened；The excavator includes above-mentioned locking device.The retention device can play anti-loosing effect to threaded connector, it is ensured that the fastening effect of threaded connector.)

1. a kind of retention device, which is characterized in that including the first washer (100) and second packing ring (200), first washer (100) two end faces are respectively first end face (130) and second end face (140), two end faces of the second packing ring (200) Respectively third end face (230) and the 4th end face (240), the second end face (140) and the third end face (230) match It closes, one of the second end face (140) and the third end face (230) are equipped with step, and another one is equipped with and the step The groove (400) to match, the step from head end caudad along the circumferentially extending of respective gasket, and the table top of the step from Head end is caudad obliquely installed to the direction away from respective gasket；

When the step is multiple, multiple steps are consistent from the rotation direction of head end caudad, and the groove (400) is also more It is a, and multiple grooves (400) and multiple steps correspond.

2. retention device according to claim 1, which is characterized in that the step is multiple, and multiple steps are first Tail is connected.

3. retention device according to claim 2, which is characterized in that the step is ten, and the groove (400) is also Ten.

4. retention device according to any one of claim 1-3, which is characterized in that the end face edge of the tail end of the step The axial setting of respective gasket.

5. retention device according to any one of claim 1-3, which is characterized in that the table top and respective pads of the step Angular range between the sagittal plane of circle is 5 °~8.4 °.

6. retention device according to any one of claim 1-3, which is characterized in that the first end face (130) is equipped with First anti-slop serrations (110).

7. retention device according to claim 6, which is characterized in that first anti-slop serrations (110) are along first pad Enclose the radial arrangement of circumferential direction of (100).

8. retention device according to any one of claim 1-3, which is characterized in that the 4th end face (240) is equipped with Second anti-slop serrations (210).

9. a kind of locking device, which is characterized in that for fixing part to be tightened, the locking device includes threaded connector and power Benefit requires retention device described in any one of 1-8, and the threaded connector (300) includes clamping joint (310) and is fixed in institute The stud (320) of clamping joint (310) is stated, the part to be tightened is equipped with the jack for the stud (320) insertion, the stud (320) the first washer (100) of the retention device and the second packing ring (200) of the retention device are sequentially passed through and is inserted into institute It states in jack, and the clamping joint (310) is abutted with the first end face (130) of first washer (100)；

Fan-shaped angle where the step is α, and the screw pitch of the stud (320) is L, and the height of the step is h,

10. a kind of excavator, which is characterized in that including locking device as claimed in claim 9.

Technical field

The present invention relates to locking device technical fields, more particularly, to a kind of retention device, locking device and excavator.

Background technique

Threaded fastener is widely used in the connection between each mechanical part, wherein being threadedly engaged for bolts and nuts is outstanding To be extensive, mainly pass through the frictional force between external screw thread and internal screw thread after the screw-internal thread fit connection of the external screw thread and nut of bolt Fastening force is maintained, is easy to loosen when mechanical part is impacted or is vibrated.

Summary of the invention

The purpose of the present invention is to provide a kind of retention device, locking device and excavators, to alleviate in the prior art Existing bolts and nuts fasten mechanical part, vibrated to be easy the technical issues of loosening.

In a first aspect, the embodiment of the present invention provides a kind of retention device, including the first washer and second packing ring, described first Two end faces of washer are respectively first end face and second end face, two end faces of the second packing ring be respectively third end face and 4th end face, the second end face are matched with the third end face, one of the second end face and the third end face Equipped with step, another one is equipped with the groove to match with the step, and the step is from head end caudad along the week of respective gasket To extension, and the table top of the step is caudad obliquely installed to the direction away from respective gasket from head end；

The step be it is multiple when, multiple steps are consistent from the rotation direction of head end caudad, the groove be also it is multiple, And multiple grooves and multiple steps correspond.

In alternative embodiments, the step is multiple, and multiple steps join end to end.

In alternative embodiments, the step is ten, and the groove is also ten.

In alternative embodiments, the end face of the tail end of the step is arranged along the axial direction of respective gasket.

In alternative embodiments, the angular range between the table top of the step and the sagittal plane of respective gasket is 5 °~8.4 °.

In alternative embodiments, the first end face is equipped with the first anti-slop serrations.

In alternative embodiments, circumferential direction radial arrangement of first anti-slop serrations along first washer.

In alternative embodiments, the 4th end face is equipped with the second anti-slop serrations.

Second aspect, the embodiment of the present invention provide a kind of locking device, for fixing part to be tightened, the locking device packet Including threaded connector and above-mentioned retention device, the threaded connector includes clamping joint and the stud for being fixed in the clamping joint, The part to be tightened be equipped with for the stud insertion jack, the stud sequentially pass through the retention device the first washer and The second packing ring of the retention device is simultaneously inserted into the jack, and the first end face of the clamping joint and first washer is supported It connects；

Fan-shaped angle where the step is α, and the screw pitch of the stud is L, and the height of the step is h,

The third aspect, the embodiment of the present invention provide a kind of excavator, including locking device described in aforementioned embodiments.

The beneficial effect of retention device of the present invention, locking device and excavator includes:

Retention device, locking device and excavator provided by the invention, wherein retention device includes that can cooperate To the first washer and second packing ring of anti-loose effect；Wherein, locking device include need be fastenedly connected part to be tightened, for pair Threaded connector that part to be tightened is fastenedly connected and for playing the anti-of anti-loose effect to being fastenedly connected for threaded connector Loose component；Wherein, excavator includes above-mentioned locking device, the workpiece for needing to connect in excavator as locking device to Fastener.

Threaded connector pass through retention device treat fastener fastened after (specifically, stud can pass through jack with Nut thread connection or jack are screw thread well format, and stud is directly threadedly coupled with threaded hole), threaded connector, which is in, to be pre-tightened State, retention device are pressed between the clamping joint of threaded connector and part to be tightened, wherein the clamping joint of threaded connector Lower end surface abuts compression with the first end face of the first washer, and the 4th end face of second packing ring is abutted with the surface of part to be tightened, prevents The table top of the step of loose component is bonded compression with the slot bottom inclined-plane of groove.The platform for unscrewing direction Yu the first washer of threaded connector The direction that rank (or groove) screws out the groove (or step) of second packing ring is consistent, is equipped with step with the first washer, second packing ring is set It is illustrated for fluted.

When part to be tightened is impacted or vibrated, threaded connector will receive the active force for unscrewing direction, be threadedly coupled Part accordingly has the tendency that generating quiet rub between the lower end surface of clamping joint and the first end face of the first washer towards direction rotation is unscrewed Power is wiped, threaded connector and the first washer rotate synchronously, the groove of the inclined table and second packing ring of the step of the first washer Slot bottom generates interaction force between inclined-plane, since there is also quiet between the 4th end face of second packing ring and the surface of part to be tightened Frictional force, second packing ring and part near-synchronous to be tightened are fixed, then the first washer is in the drive of threaded connector and second Under the supporting role on gasket groove bottom inclined-plane, the table top of the first washer is gradually backed out recessed along the slot bottom inclined-plane upward sliding of second packing ring Slot.Since angle fan-shaped where step is α, the screw pitch of bolt is L, and the height of step is h,Then first washer It is identical to be greater than threaded connector rotation for the raised height of table top when table top turns an angle relative to the slot bottom inclined-plane of second packing ring The height that angle rises, then the first washer rotational angle is bigger, and difference in height is bigger, and the first washer is upward to threaded connector to be squeezed Pressure is bigger, and the pressure between the external screw thread and nut of respective threaded connector or the internal screw thread of part to be tightened is bigger, frictional force Bigger, the fastening effect that threaded connector treats fastener is stronger, to effectively play anti-loose effect, it is ensured that threaded connector pair The fastening effect of part to be tightened.

The workpiece of excavator can effectively ensure threaded connector to the tight of workpiece using above-mentioned locking device Gu and then ensuring the normal operation of workpiece.

Detailed description of the invention

It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural representation that threaded connector is arranged in retention device in locking device provided in an embodiment of the present invention Figure；

Fig. 2 is the perspective view of the explosion of the first washer and second packing ring of threaded connector and retention device in Fig. 1；

Fig. 3 is schematic diagram when first washer and second packing ring cooperate in retention device provided in an embodiment of the present invention, In, second packing ring is equipped with a second step, and the first washer is equipped with the groove to match with second step；

Fig. 4 is schematic diagram when first washer and second packing ring cooperate in retention device provided in an embodiment of the present invention, In, the first washer is equipped with a first step, and second packing ring is equipped with the groove to match with first step；

Fig. 5 is that the first washer turns an angle with respect to second packing ring in Fig. 4 and opposite second packing ring rises certain altitude When schematic diagram.

Icon: the first washer of 100-；The first anti-slop serrations of 110-；120- first step；130- first end face；140- second end Face；200- second packing ring；The second anti-slop serrations of 210-；220- second step；230- third end face；The 4th end face 240-；300- spiral shell Line connector；310- clamping joint；320- stud；400- groove.

Specific embodiment

In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented The component of example can be arranged and be designed with a variety of different configurations.

Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects It encloses.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.

In the description of the present invention, it should be noted that the instructions such as term " on ", "lower", "vertical", "inner", "outside" Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when usually put Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.This Outside, term " first ", " second ", " third ", " the 4th " etc. are only used for distinguishing description, are not understood to indicate or imply opposite Importance.

In addition, the terms such as "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly tilted.Such as "horizontal" only refers to that its direction is more horizontal with respect to for "vertical", be not indicate the structure have to fully horizontally, and It is that can be slightly tilted.

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

With reference to the accompanying drawing, it elaborates to some embodiments of the present invention.In the absence of conflict, following Feature in embodiment and embodiment can be combined with each other.

The present embodiment provides a kind of retention devices, as Figure 2-Figure 5, including the first washer 100 and second packing ring 200, Two end faces of the first washer 100 are respectively first end face 130 and second end face 140, two end faces difference of second packing ring 200 For third end face 230 and the 4th end face 240, second end face 140 is matched with third end face 230, second end face 140 and third end One of face 230 is equipped with step, and another one is equipped with the groove 400 to match with step, and step is from head end caudad along corresponding The circumferentially extending of washer, and the table top of step is caudad obliquely installed to the direction away from respective gasket from head end；Step is more When a, multiple steps are consistent from the rotation direction of head end caudad, and groove 400 is also to be multiple, and multiple grooves 400 and multiple steps one One is corresponding.

The present embodiment also provides a kind of locking device, as depicted in figs. 1 and 2, for fixing part to be tightened, the locking dress It sets including threaded connector and above-mentioned retention device, threaded connector 300 includes clamping joint 310 and is fixed in clamping joint 310 Stud 320, part to be tightened are equipped with the jack being inserted into for stud 320, and stud 320 sequentially passes through the first washer 100 of retention device With the second packing ring 200 of retention device and be inserted into jack, and the of the clamping joint 310 of threaded connector and the first washer 100 One end face 130 abuts；Fan-shaped angle where step is α, and the screw pitch of stud 320 is L, and the height of step is h,

The present embodiment also provides a kind of excavator, including above-mentioned locking device.

Retention device, locking device and excavator provided in this embodiment, wherein retention device includes that can cooperate Play the first washer 100 and second packing ring 200 of anti-loose effect；Wherein, locking device include need be fastenedly connected it is to be tightened Part, for treating threaded connector 300 that fastener is fastenedly connected and for being fastenedly connected to threaded connector 300 To the retention device of anti-loose effect；Wherein, excavator includes above-mentioned locking device, and the workpiece for needing to connect in excavator is made For the part to be tightened of locking device.

Threaded connector 300 passes through retention device and treats after fastener is fastened that (specifically, stud 320 can pass through Jack is connect with nut thread or jack is screw thread well format, and stud 320 is directly threadedly coupled with threaded hole), threaded connector 300 are in Pre strained state, and retention device is pressed between the clamping joint 310 of threaded connector 300 and part to be tightened, wherein spiral shell The lower end surface of the clamping joint 310 of line connector 300 abuts compression, second packing ring 200 with the first end face 130 of the first washer 100 The 4th end face 240 abutted with the surface of part to be tightened, the table top of the step of retention device is bonded with the slot bottom inclined-plane of groove 400 It compresses.The step (or groove 400) for unscrewing direction and the first washer 100 of threaded connector 300 screws out the recessed of second packing ring 200 The direction of slot 400 (or step) is consistent, as shown in Figure 4 and Figure 5, is equipped with step with the first washer 100, second packing ring 200 is equipped with It is illustrated for groove 400.

When part to be tightened is impacted or vibrated, threaded connector 300 will receive the active force for unscrewing direction, and screw thread connects Fitting 300 accordingly have the tendency that towards unscrew direction rotate, the first end face of the lower end surface of clamping joint 310 and the first washer 100 Stiction is generated between 130, threaded connector 300 and the first washer 100 rotate synchronously, and the step of the first washer 100 inclines Interaction force is generated between the slot bottom inclined-plane of the groove 400 of sloping platform face and second packing ring 200, due to the of second packing ring 200 There is also stiction between four end faces 240 and the surface of part to be tightened, second packing ring 200 is fixed with part near-synchronous to be tightened Motionless, then the first washer 100 is such as schemed under the supporting role on the 200 slot bottom inclined-plane of drive and second packing ring of threaded connector 300 Shown in 5, the table top of the first washer 100 is gradually backed out groove 400 along the slot bottom inclined-plane upward sliding of second packing ring 200.Due to platform Fan-shaped angle where rank is α, and the screw pitch of threaded connector 300 is L, and the height of step is h,Then the first washer The raised height of table top is greater than threaded connector when 100 table top turns an angle with respect to the slot bottom inclined-plane of second packing ring 200 The height that 300 rotation equal angulars rise, then 100 rotational angle of the first washer is bigger, and difference in height is bigger, and the first washer 100 is right The upward extruding force of threaded connector 300 is bigger, the external screw thread and nut of respective threaded connector 300 or the interior spiral shell of part to be tightened Pressure between line is bigger, frictional force is bigger, and the fastening effect that threaded connector 300 treats fastener is stronger, to effectively rise To anti-loose effect, it is ensured that threaded connector 300 treats the fastening effect of fastener.

The workpiece of excavator can effectively ensure threaded connector 300 to workpiece using above-mentioned locking device Fastening, and then ensure the normal operation of workpiece.

Specifically, threaded connector 300 can select bolt, clamping joint of the screw head of bolt as threaded connector 300 310, stud 320 of the screw rod of bolt as threaded connector 300.Specifically, excavator can be hydraulic crawler excavator.This implementation In example, as depicted in figs. 1 and 2, step can be multiple, and multiple steps join end to end.In first washer 100, multiple steps Ring-type is formed along the first being circumferentially arranged for washer 100；In second packing ring 200, multiple grooves 400 to match with step are along second Washer 200 is circumferentially arranged to form ring-type, wherein skewed step (the first washer 100 is also formed between adjacent grooves 400 In it can be appreciated that between adjacent step formed groove 400), the second end face 140 that can define the first washer 100 here is set There are multiple first steps 120, the third end face 230 of second packing ring 200 is equipped with multiple second steps 220, wherein second step 220 table top is the slot bottom of groove 400, when the first washer 100 cooperates with second packing ring 200, the table top of first step 120 with The table top cooperation of second step 220 abuts (be equivalent to first step 120 and be plugged in groove 400).

When part to be tightened is impacted or vibrated, threaded connector 300 is threadedly coupled by the active force for unscrewing direction Part 300 accordingly has the tendency that rotating and driving the synchronous rotation of the first washer 100 towards unscrewing direction, and the first washer 100 exists Under the supporting role of 220 table top of drive and 200 second step of second packing ring of threaded connector 300, the first of the first washer 100 The table top of step 120 along the second step 220 of second packing ring 200 table top upward sliding, should during, second packing ring 200 The table top of multiple second steps 220 is carried out in table top of the circumferential different location to multiple first steps 120 of the first washer 100 Support, so that it is guaranteed that stability of strutting system of the second packing ring 200 to the first washer 100, it is ensured that retention device is to threaded connector 300 Extruding force, reduce the 100 local pressure run-off the straight of the first washer it is smaller to the extruding force of threaded connector 300 can not play it is anti- The occurrence of pine effect, even stud 320 is stuck.

Specifically, in the present embodiment, step can be ten, and groove 400 is also ten.That is, first in the first washer 100 The number of step 120 is ten, and the number of second step 220 is also ten in second packing ring 200, ten of first step 120 Table top cooperates one by one with ten table tops of second step 220 to abut, and when work, the table top of ten second steps 220 can be along The circumferential direction of one washer 100 is supported in table top of the different location to first step 120.What needs to be explained here is that step Number can also be two, three etc. in addition to above-mentioned ten.

In the present embodiment, as shown in Fig. 1, Fig. 3-Fig. 5, the end face of the tail end of step can be set along the axial direction of respective gasket It sets.On the basis of visual angle in Fig. 1, the direction a indicates upper direction, and the direction b indicates lower direction, when the visual angle, the end of the tail end of step Face is vertical plane, when the first washer 100 cooperates with second packing ring 200, the end face of 120 tail end of first step with corresponding second The end face of 220 tail end of second step of 220 upstream of rank cooperates, and the end face of 220 tail end of first step 120 and second step is perpendicular It faces directly, on the one hand, on the basis of can ensure that first step 120 is matched with second step 220, compare adding for face of slope Work, vertical plane is more convenient when processing, mutually it is ensured that machining accuracy and reduction processing cost；On the other hand, 120 phase of first step When compared with 220 ascending motion of second step, nothing is rubbed between the end face of 120 tail end of end face and first step of 220 tail end of second step Power is wiped, the corresponding second packing ring 200 that reduces is to the inhibition of the first washer 100, it is ensured that the first washer 100 is to threaded connector 300 extruding force.It should be noted that above-mentioned " end face of step tail end is arranged along the axial direction of respective gasket " is not limited to hold Face is vertically arranged, and is included in range in 10 ° within angle with vertical plane.

Optionally, in the present embodiment, as shown in figure 3, the angle between the table top of step and the sagittal plane of respective gasket It may range from 5 °~8.4 °；Preferably, the angular range β between the table top of step and the sagittal plane of respective gasket can be 8.4°.On the basis of visual angle in Fig. 3, when the visual angle, horizontal plane is the sagittal plane of washer；Specifically, threaded connector 300 Can be with the bolt of selection standard M10, the lead angle on stud 320 is 2 ° of 30 ＂, screw pitch L=1.5mm, first step 120 and water Angle β between plane is 8.4 °, and the angle β between corresponding second step 220 and horizontal plane is also 8.4 °, works as first step 120 under the drive of threaded connector 300 relative to second packing ring 200 rotate a second step 220 angle [alpha] when, i.e., first Step 120 rotates α=36 ° and rises h=0.62mm；The thread synchronous of stud 320 rotates the 1/10 of screw pitch for 0.15mm, then upwards The difference in height that the height and the first washer 100 that stud 320 rises rise is 0.47mm, the then upward clamping of the first washer 100 First 310 make 320 deformation of stud elongate 0.47mm, and the biggish deformation of stud 320 makes the external screw thread of stud 320 and nut or to be tightened Pressure between the internal screw thread of part greatly increases, frictional force increases accordingly, and threaded connector 300 treats the fastening effect of fastener It is stronger, to effectively play anti-loose effect, it is ensured that threaded connector 300 treats the fastening effect of fastener.

It should be noted that the unscrewing torque applied to threaded connector 300 cannot be excessive when disassembly, to reduce to spiral shell The destruction of line connector 300 extends the service life of threaded connector 300；And the value range of angle β can be according to specific The selection of dimension of bolt model and the first washer 100, second packing ring 200.

In the present embodiment, optionally, as shown in Fig. 2, the first anti-slop serrations 110 can be arranged in first end face 130.First is anti- Slip teeth 110 is located between the first end face 130 of the first washer 100 and the 4th end face 240 of clamping joint 310, to increase the two Between frictional force so that frictional force between the two is greater than between the table top of first step 120 and the table top of second step 220 Frictional force reduce threaded connector so that it is guaranteed that threaded connector 300 is able to drive the synchronous rotation of the first washer 100 300 own rotations and without relative motion between the first washer 100 and second packing ring 200, cause retention device not have locking work The occurrence of using.

In the present embodiment, as shown in Fig. 2, the second anti-slop serrations 210 can also be equipped in the 4th end face 240.Similarly, second Anti-slop serrations 210 are located between the 4th end face 240 of second packing ring 200 and part to be tightened, to increase frictional force between the two, So that frictional force between the two is greater than the frictional force between the table top of first step 120 and the table top of second step 220, thus Ensure the opposing stationary of second packing ring 200 and part to be tightened, when reducing threaded connector 300 and driving the rotation of the first washer 100 The occurrence of synchronous belt second packing ring 200 rotates, and retention device is caused not have anti-loose effect.

Specifically, the side relatively rotated between clamping joint 310 and the first washer 100 or second packing ring 200 and part to be tightened To rotation direction is defined as, the first anti-slop serrations 110 and the second anti-slop serrations 210 can radially extend radial set along washer It sets, so set, the length direction of anti-slop serrations is vertically arranged with rotation direction, barrier effect can be effectively played, increase clamping Frictional force between first 310 and first washer 100, second packing ring 200 and part to be tightened.

In the present embodiment, the overall thickness of the first washer 100 and second packing ring 200 can be with the fastening thickness phase of part to be tightened Deng.Firstly, what needs to be explained here is that, above-mentioned " fastening thickness " refers to that stud 320 screws in the length of part to be tightened；Acting on The ratio that active force adds the extruding force on threaded connector 300 with retention device that unscrews on threaded connector 300 is known as Force coefficient, for bolt, the length of Force coefficient and bolt is inversely proportional, directly proportional to screw diameter, therefore extends spiral shell The connection length of bolt reduces the coupling stiffness of screw rod.When the first washer 100 and the overall thickness of second packing ring 200 are revolved close to bolt When entering the length of part to be tightened, relative to the structure for not using retention device, under the action of reaching identical pretightning force, bolt Relative deformation is bigger, i.e., under the action of identical unscrewing torque, when pretightning force loses identical value, the screw thread of the present embodiment connects The axial distance that fitting 300 loosens is longer, it is loose move back that the time is longer, so that being further reduced threaded connector 300 loosens situation Occur, it is ensured that the fastening effect of threaded connector 300.

Optionally, excavator may include engine, compressor and bracket, and frame bottom is equipped with flange, and flange is equipped with For the through-hole that stud 320 passes through, engine is equipped with threaded hole, and the flange and engine of bracket are as the to be tightened of locking device Part, the stud 320 of retention device screw in threaded hole after sequentially passing through the first washer 100, second packing ring 200, through-hole, by bracket with Engine is fastened together；Compressor is rack-mount, so that it is guaranteed that supporting role of the bracket to compressor, specifically Ground, bracket can be the assembly of fixed frame and adjustment frame according to the actual situation.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.