CN215059243U - Stop washer applied to eccentric wheel belt tensioning mechanism - Google Patents

Abstract

The application provides a be applied to eccentric wheel belt straining device's lock washer belongs to packing ring technical field. The stop washer applied to the eccentric wheel belt tensioning mechanism comprises a belt tensioning mechanism and a fastening stop mechanism. Belt straining device includes rocking arm and eccentric wheel, fastening detent mechanism includes fastening bolt, gland, lock washer, stopping packing ring and fastening nut, fastening bolt run through peg graft in the rocking arm tip, the gland cup joint in fastening bolt, lock washer's interior lock lug joint in fastening bolt, lock washer's outer lock lug joint in the gland bottom, the first stopping lug joint of stopping packing ring in the rocking arm, the second stopping lug joint of stopping packing ring in fastening nut, this application can play lasting locking detent effect through lock washer and stopping packing ring, can fix the eccentric wheel reliably, prescribe a limit to fastening bolt's axial motion reliably.

Description

Stop washer applied to eccentric wheel belt tensioning mechanism

Technical Field

The application relates to the field of gaskets, in particular to a stop gasket applied to an eccentric wheel belt tensioning mechanism.

Background

The existing belt transmission is applied to multiple fields such as machine tool production, machine tool transmission and the like, however, due to the self-contractibility of the belt, the belt which works for a long time is loosened and deformed, and the transmission efficiency of the belt is influenced. Therefore, an eccentric wheel tensioning mechanism specially used for tensioning a belt is produced to achieve the purpose of tensioning the belt.

However, the existing eccentric wheel belt tensioning mechanism is not provided with a stop washer applied to the eccentric wheel, the eccentric wheel has poor anti-loosening and stop effects, and the eccentric wheel is difficult to reliably fix, so that the axial movement of a fastening bolt cannot be reliably limited.

SUMMERY OF THE UTILITY MODEL

In order to make up for above not enough, the application provides a lock washer who is applied to eccentric wheel belt straining device, aims at improving current eccentric wheel belt straining device, does not set up the lock washer who is applied to the eccentric wheel, and the anti-loosening locking effect of eccentric wheel is not good, is difficult to the problem of fixed eccentric wheel reliably.

The embodiment of the application provides a stop washer applied to an eccentric wheel belt tensioning mechanism, which comprises a belt tensioning mechanism and a fastening stop mechanism.

The belt tensioning mechanism comprises a rocker arm and an eccentric wheel, and the eccentric wheel is rotatably arranged at one end of the rocker arm.

The fastening stop mechanism comprises a fastening bolt, a gland, a stop washer, a stopping washer and a fastening nut, the fastening bolt penetrates through and is inserted into the end part of the rocker arm, the end part of the rocker arm is provided with a stepped through hole matched with the fastening bolt, the rocker arm is close to the side wall of one end of the through hole and is provided with a compensation gap, the gland is sleeved on the fastening bolt and is positioned at one end of the top part of the through hole, the gland is fixedly connected with the rocker arm through a locking screw, the stop washer is sleeved on the gland and the fastening bolt between the rocker arms, an inner stop lug of the stop washer is clamped on the fastening bolt, an outer stop lug of the stop washer is clamped on the bottom part of the gland, the fastening nut is sleeved on the bottom end of the fastening bolt, the stopping washer is sleeved on the fastening nut and the fastening bolt between the rocker arms, the first stopping lug of the stopping washer is clamped at the bottom end of the through hole, and the second stopping lug of the stopping washer is clamped at the fastening nut.

In the implementation process, the inner stop lug of the stop washer is clamped and connected with the fastening bolt, so that the stop washer and the fastening bolt are clamped and fixed together, the gland is sleeved at the top end of the fastening bolt and is fixed by the locking screw, the outer stop lug of the stop washer is clamped at the bottom of the gland so that the stop washer is clamped and fixed with the gland, the stop washer is clamped by the gland and clamps the fastening bolt, thereby the top end of the fastening bolt is clamped and fixed at the top end of the rocker arm, the fastened fastening nut, the backstop washer and the rocker arm form a fastened whole through the first backstop lug and the second backstop lug of the backstop washer, and the durable anti-loose and stopping effect can be achieved, in the process, the compensation gap is compressed, and the rotation of the eccentric wheel relative to the rocker arm can be limited, so that the eccentric wheel is reliably fixed, and further the axial movement of the fastening bolt is reliably limited.

In a specific embodiment, a limiting ring is fixed on the peripheral side wall of the fastening bolt, the limiting ring is clamped at the top end of the through hole, and a U-shaped groove matched with the inner stop lug is formed in the peripheral side wall of the fastening bolt above the limiting ring.

In the implementation process, the limiting ring can limit and fix the fastening bolt in the vertical direction, and the locking lug is clamped into the U-shaped groove, so that the locking washer and the fastening bolt are clamped and fixed together.

In a specific embodiment, the array of outer stop lugs is provided in a plurality, and the plurality of outer stop lugs are arranged at intervals on the outer periphery of the stop washer and extend obliquely to the same axial side of the stop washer.

In a specific embodiment, the inner stop lug and the outer stop lug are located on the same side of the stop washer, and the inner stop lug extends in a direction perpendicular to the plane of the stop washer.

In a specific embodiment, the bottom of the peripheral side wall of the gland is provided with a tapered chamfer surface, and the tapered chamfer surface is uniformly provided with a plurality of open grooves matched with the outer stop lugs.

In the implementation process, the outer stop lug of the stop washer is clamped into the open slot on the tapered chamfered surface, so that the stop washer and the gland are clamped and fixed.

In a specific embodiment, the pressing cover is symmetrically provided with limiting holes matched with the locking screws, and the limiting holes and the open grooves are arranged in a staggered manner.

In a specific implementation scheme, a flange part is fixed at the top end of the fastening nut, a circle of sawtooth-shaped anti-slip teeth are uniformly arranged on the peripheral side surface of the flange part, the second stopping lugs are buckled in the anti-slip teeth, and the direction of the anti-slip teeth is opposite to the screwing direction of the fastening nut.

In the above-mentioned realization in-process, when the anti-skidding tooth of fastening nut is close the second stopping ear, proper outside prizes the second stopping ear so that fastening nut continues the precession, and release second stopping ear then it can be along with fastening nut's precession under self elasticity and constantly slide on the anti-skidding tooth, and when fastening nut screwed up the back, the second stopping ear can the lock in the tooth's socket of anti-skidding tooth in order to prevent fastening nut from revolving.

In a specific embodiment, the bottom end of the fastening bolt is convex, the bottom end of the fastening bolt is provided with an external thread, and the fastening nut and the flange part are both provided with an internal thread matched with the external thread.

In a specific embodiment, the rocker arm at the top end of the through hole is symmetrically provided with threaded holes adapted to the locking screws, and the rocker arm at the bottom end of the through hole is provided with insertion holes adapted to the first retaining lugs.

In a specific embodiment, the outer contour of the cross section of the eccentric wheel is circular, a circular through hole matched with the outer contour of the eccentric wheel is formed in the rocker arm, and the eccentric wheel is arranged in the circular through hole.

In the implementation process, the bonding strength of the eccentric wheel and the rocker arm is improved, and the overall structure is more stable.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic view of a stop washer configuration as applied to an eccentric belt tensioning mechanism as provided by an embodiment of the present application;

FIG. 2 is a schematic structural view of a belt tensioning mechanism provided in an embodiment of the present application;

FIG. 3 is a schematic structural view of a fastening and stopping mechanism provided in an embodiment of the present application;

FIG. 4 is a schematic structural view of a fastening bolt provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a gland provided in an embodiment of the present application from a second perspective;

FIG. 6 is a schematic view of a stop washer according to an embodiment of the present disclosure from a first perspective;

FIG. 7 is a schematic view of a stop washer according to an embodiment of the present disclosure from a second perspective;

FIG. 8 is a schematic view of a retaining washer according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a fastening nut from a second perspective according to an embodiment of the present disclosure.

In the figure: 10-a belt tensioning mechanism; 110-a rocker arm; 111-through holes; 112-compensating for gaps; 113-a threaded hole; 114-a jack; 115-circular through holes; 120-eccentric wheel; 20-a fastening stop mechanism; 210-fastening bolts; 211-a stop collar; 212-U-shaped groove; 213-external threads; 220-a gland; 221-an open slot; 222-a limiting hole; 230-locking screws; 240-stop washer; 241-inner stop ears; 242-external stop ears; 250-retaining washers; 251-a first backstop ear; 252-a second backstop ear; 260-fastening nuts; 261-anti-slip teeth; 262-internal thread.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1-9, the present application provides a stop washer for an eccentric belt tensioner comprising a belt tensioner 10 and a fastening stop 20.

Referring to fig. 2, the belt tensioner 10 includes a rocker arm 110 and an eccentric 120, the eccentric 120 being rotatably mounted to an end of the rocker arm 110. The outer contour of the cross section of the eccentric wheel 120 is circular, a circular through hole 115 matched with the outer contour of the eccentric wheel 120 is formed in the rocker arm 110, the eccentric wheel 120 is arranged in the circular through hole 115, a compensation gap 112 is formed in the side wall of one end, close to the through hole 111, of the rocker arm 110, the compensation gap 112 is communicated with the circular through hole 115, when the compensation gap 112 is free from external force, the eccentric wheel 120 can rotate in the circular through hole 115, and the eccentric wheel 120 can be limited to rotate relative to the rocker arm 110 by compressing the compensation gap 112, so that the eccentric wheel 120 is fixed.

Referring to fig. 2 and 3, the fastening and stopping mechanism 20 includes a fastening bolt 210, a gland 220, a stopping washer 240, a stopping washer 250 and a fastening nut 260, the fastening bolt 210 is inserted into an end portion of the rocker arm 110, specifically, the end portion of the rocker arm 110 is provided with a stepped through hole 111 adapted to the fastening bolt 210, the compensation gap 112 is communicated with the through hole 111, a hexagonal sinking groove is formed in a top end of the fastening bolt 210, a tool is conveniently used to clamp a top end of the fastening bolt 210, a limiting ring 211 is fixed on a peripheral side wall of the fastening bolt 210, the limiting ring 211 and the fastening bolt 210 are integrally formed, the limiting ring 211 is clamped at the top end of the through hole 111, and the fastening bolt 210 is limited and fixed in a vertical direction.

Referring to fig. 3, 4, 5, 6, and 7, a gland 220 is sleeved on one end of a fastening bolt 210 at the top of a through hole 111, the gland 220 is fixedly connected with a rocker arm 110 through a locking screw 230, specifically, the gland 220 is symmetrically provided with limiting holes 222 adapted to the locking screw 230, the limiting holes 222 are arranged in a staggered manner with an open slot 221, the rocker arm 110 at the top end of the through hole 111 is symmetrically provided with threaded holes 113 adapted to the locking screw 230, the locking screw 230 penetrates through the limiting hole 222 and is screwed into the threaded hole 113, so that the gland 220 is fixed on the rocker arm 110 at the top of the through hole 111, a stop washer 240 is sleeved on the fastening bolt 210 between the gland 220 and the rocker arm 110, when specifically arranged, an inner stop lug 241 of a stop washer 240 is clamped on the fastening bolt 210, a U-shaped slot 212 adapted to the inner stop lug 241 is formed on the peripheral side wall of the fastening bolt 210 above the limit ring 211, the U-shaped slot 212 extends from the wall of the fastening bolt 210 above the limit ring 211 to the top end, the stop washer 240 is sleeved in from the top end of the fastening bolt 210, the inner stop lug 241 of the stop washer 240 is clamped in the U-shaped groove 212, the stop washer 240 is clamped and fixed with the fastening bolt 210, the outer stop lug 242 of the stop washer 240 is clamped at the bottom of the gland 220, specifically, the outer stop lugs 242 are arranged in an array, the outer stop lugs 242 are arranged at intervals, the outer periphery of the stop washer 240 is arranged and obliquely extends towards the same axial side of the stop washer 240, the inner stop lug 241 and the outer stop lug 242 are positioned at the same side of the stop washer 240, the extending direction of the inner stop lug 241 is vertical to the plane of the stop washer 240, the bottom of the peripheral side wall of the gland 220 is provided with a tapered chamfer surface, the tapered chamfer surface and the outer stop lug 242 are obliquely extended at the same angle, the tapered chamfer surface is uniformly provided with a plurality of opening grooves 221 matched with the outer stop lug 242, when the gland 220 is fixed on the rocker arm 110 at the top of the through hole 111 by the locking bolt 230, the tapered chamfer surface of the gland 220 is pressed against the top of the stop washer 240, and the outer stop lug 242 of the stop washer 240 can be clamped into the open slot 221 on the tapered chamfer surface, so that the stop washer 240 is clamped and fixed with the gland 220, the stop washer 240 is clamped by the gland 220, the stop washer 240 clamps the fastening bolt 210, and the top end of the fastening bolt 210 is clamped and fixed on the top end of the rocker arm 110.

Referring to fig. 3, 8 and 9, a fastening nut 260 is threadedly sleeved at the bottom end of the fastening bolt 210, specifically, the bottom end of the fastening bolt 210 is convex, an external thread 213 is formed at the bottom end of the fastening bolt 210, internal threads 262 adapted to the external thread 213 are formed on the fastening nut 260 and the flange portion, a stop washer 250 is sleeved on the fastening bolt 210 between the fastening nut 260 and the rocker arm 110, the internal threads 262 of the fastening nut 260 are matched with the external thread 213 of the fastening bolt 210, the stop washer 250 is fixed between the fastening nut 260 and the rocker arm 110 at the bottom end of the through hole 111, when specifically configured, a first stop lug 251 of the stop washer 250 is clamped to the rocker arm 110 at the bottom end of the through hole 111, a jack 114 adapted to the first stop lug 251 is formed on the rocker arm 110 at the bottom end of the through hole 111, the first stop lug 251 is inserted into the jack 114, so that one end of the stop washer 250 is fixed on the rocker arm 110, a second stop lug 252 of the stop washer 250 is clamped to the fastening nut 260, it should be noted that a flange part is fixed at the top end of the fastening nut 260, a circle of sawtooth-shaped anti-slip teeth 261 are uniformly arranged on the peripheral side surface of the flange part, the second anti-return lug 252 is buckled in the anti-slip teeth 261, the direction of the anti-slip teeth 261 is opposite to the screwing direction of the fastening nut 260, when in use, the anti-return washer 250 is sleeved at the bottom end of the fastening bolt 210, the first anti-return lug 251 is inserted into the insertion hole 114, then the fastening nut 260 is screwed in and the flange part thereof is upward, when the anti-slip teeth 261 of the fastening nut 260 approach the second anti-return lug 252, the second anti-return lug 252 is properly pried outwards to enable the fastening nut 260 to be screwed in continuously, the second anti-return lug 252 is released to continuously slide on the anti-slip teeth 261 along with the screwing of the fastening nut 260 under the self elasticity, and after the fastening nut 260 is screwed, the second anti-return lug 252 is buckled in the tooth groove of the anti-slip teeth 261 to prevent the fastening nut 260 from rotating, therefore, the tightened fastening nut 260, the retaining washer 250 and the rocker arm 110 form a fastened whole, and a durable anti-loosening effect can be achieved.

The working principle of the stop washer applied to the eccentric wheel belt tensioning mechanism is as follows: when in use, the eccentric wheel 120 is rotatably arranged in a circular through hole 115 formed on the rocker arm 110, the fastening bolt 210 is inserted into a stepped through hole 111 formed at the end of the rocker arm 110, the stop washer 240 is sleeved from the top end of the fastening bolt 210, the inner stop lug 241 of the stop washer 240 is clamped into the U-shaped groove 212, the stop washer 240 and the fastening bolt 210 are clamped and fixed together, the gland 220 is sleeved at the top end of the fastening bolt 210 and fixed through the locking screw 230, the tapered chamfered surface of the gland 220 is tightly pressed at the top of the stop washer 240, the outer stop lug 242 of the stop washer 240 can be clamped into the open groove 221 on the tapered chamfered surface, so that the stop washer 240 and the gland 220 are clamped and fixed, the stop washer 240 clamps the fastening bolt 210, the top end of the fastening bolt 210 is clamped at the top end of the rocker arm 110, and the anti-back washer 250 is sleeved at the bottom end of the fastening bolt 210, and the first stopping lug 251 is inserted into the insertion hole 114, the fastening nut 260 is continuously screwed in with its flange portion directed upward, when the anti-slip teeth 261 of the fastening nut 260 approach the second stopping lugs 252, the second stopping lugs 252 are pried to the outside to make the fastening nut 260 continuously screwed in, and when the second stopping lugs 252 are released, the anti-slip teeth 261 continuously slip along with the screwing of the fastening nut 260 under the self elasticity, after the fastening nut 260 is tightened, the second anti-back lug 252 is buckled in the tooth groove of the anti-slip tooth 261 to prevent the fastening nut 260 from rotating, so that the tightened fastening nut 260, the anti-back washer 250 and the rocker arm 110 form a fastened whole, which can play a lasting anti-loose and stopping effect, in the process, the compensation gap 112 is compressed, which limits the rotation of the eccentric 120 relative to the rocker 110, thereby reliably fixing the eccentric 120 and thus reliably limiting the axial movement of the fastening bolt 210.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A stop washer applied to an eccentric wheel belt tensioning mechanism is characterized by comprising

The belt tensioning mechanism (10), the belt tensioning mechanism (10) comprises a rocker arm (110) and an eccentric wheel (120), and the eccentric wheel (120) is rotatably installed at one end of the rocker arm (110);

fastening stop motion (20), fastening stop motion (20) includes fastening bolt (210), gland (220), lock washer (240), stopping washer (250) and fastening nut (260), fastening bolt (210) run through peg graft in rocking arm (110) tip, rocking arm (110) tip seted up with notch cuttype perforating hole (111) of fastening bolt (210) adaptation, rocking arm (110) are close to seted up on the lateral wall of perforating hole (111) one end and compensate gap (112), gland (220) cup joint in fastening bolt (210) is located the one end at perforating hole (111) top, gland (220) pass through locking screw (230) with rocking arm (110) fixed connection, lock washer (240) cover is located gland (220) with between rocking arm (110) fastening bolt (210), the inner stopping lug (241) of the stopping washer (240) is clamped on the fastening bolt (210), the outer stopping lug (242) of the stopping washer (240) is clamped on the bottom of the gland (220), the fastening nut (260) is sleeved on the bottom end of the fastening bolt (210) in a threaded manner, the stopping washer (250) is sleeved on the fastening bolt (210) between the fastening nut (260) and the rocker arm (110), the first stopping lug (251) of the stopping washer (250) is clamped on the rocker arm (110) at the bottom end of the through hole (111), and the second stopping lug (252) of the stopping washer (250) is clamped on the fastening nut (260).

2. The stop washer for the eccentric wheel belt tensioning mechanism according to claim 1, wherein a limit ring (211) is fixed on the peripheral side wall of the fastening bolt (210), the limit ring (211) is clamped at the top end of the through hole (111), and a U-shaped groove (212) matched with the inner stop lug (241) is formed on the peripheral side wall of the fastening bolt (210) above the limit ring (211).

3. A stop washer for eccentric belt tensioning mechanism according to claim 1, characterized in that said outer stop lugs (242) are arranged in several arrays, several of said outer stop lugs (242) are arranged at intervals on the outer circumference side of said stop washer (240) and extend obliquely to the same axial side of said stop washer (240).

4. A stop washer for eccentric belt tensioning mechanism according to claim 3 characterized in that said inner stop ear (241) and said outer stop ear (242) are located on the same side of the stop washer (240) and the extension direction of the inner stop ear (241) is perpendicular to the plane of the stop washer (240).

5. The lock washer for the eccentric wheel belt tensioning mechanism according to claim 3, wherein a tapered chamfer is formed at the bottom of the peripheral side wall of the gland (220), and a plurality of open grooves (221) matched with the outer lock lug (242) are uniformly formed on the tapered chamfer.

6. The stop washer applied to the eccentric wheel belt tensioning mechanism according to claim 5, wherein the gland (220) is symmetrically provided with limit holes (222) matched with the locking screws (230), and the limit holes (222) and the open grooves (221) are arranged in a staggered manner.

7. The lock washer for the eccentric wheel belt tensioning mechanism according to claim 1, wherein a flange portion is fixed at the top end of the fastening nut (260), a circle of sawtooth-shaped anti-slip teeth (261) are uniformly formed on the peripheral side surface of the flange portion, the second anti-back ear (252) is buckled in the anti-slip teeth (261), and the direction of the anti-slip teeth (261) is opposite to the screwing direction of the fastening nut (260).

8. The stop washer for the eccentric wheel belt tensioning mechanism according to claim 7, wherein the bottom end of the fastening bolt (210) is convex, the bottom end of the fastening bolt (210) is provided with an external thread (213), and the fastening nut (260) and the flange part are both provided with an internal thread (262) adapted to the external thread (213).

9. The lock washer for the eccentric wheel belt tensioning mechanism according to claim 1, wherein the rocker arm (110) at the top end of the through hole (111) is symmetrically provided with threaded holes (113) adapted to the locking screws (230), and the rocker arm (110) at the bottom end of the through hole (111) is provided with insertion holes (114) adapted to the first stopping lugs (251).

10. The stop washer for the eccentric wheel belt tensioning mechanism according to claim 1, wherein the outer profile of the cross section of the eccentric wheel (120) is circular, the rocker arm (110) is provided with a circular through hole (115) matched with the outer profile of the eccentric wheel (120), and the eccentric wheel (120) is arranged in the circular through hole (115).

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