CN212429557U - Clutch mechanism for reduction gearbox gear - Google Patents

Abstract

The utility model relates to a clutch mechanism for reducing gear box gear, it establishes the section of thick bamboo that rotates in pivot one including rotating the cover, the drive rod of setting in pivot one, pivot one is close to gear reduction mechanism's one end and is equipped with the chimb, the chimb is located the below of rotating the section of thick bamboo, the connecting hole has been seted up at the center of driving gear, the driving gear cover is established on rotating the section of thick bamboo, the inner wall and the laminating of a rotating section of thick bamboo of connecting hole, driving gear and rotating section of thick bamboo relatively fixed, the sector hole has been seted up on the driving gear, the sector hole is the through-hole of vertical direction, sector hole and connecting hole intercommunication, the arc hole has been seted up on the rotating section of thick bamboo, the arc hole is the through-hole of horizontal direction, it passes the. The utility model discloses thereby have the effect that can cushion, protect driving gear and sector gear when the driving gear reversal.

Description

Clutch mechanism for reduction gearbox gear

Technical Field

The utility model belongs to the technical field of clutch's technique and specifically relates to a clutching mechanism for reducing gear box gear is related to.

Background

The reduction gearbox is also called a speed reducer or a speed reducer, works according to the principle that a prime motor is connected with the reduction gearbox and then the reduction gearbox is connected with a working machine, and is power transmission equipment. The reduction gearbox can be divided into an industrial reduction gearbox and a steam reduction gearbox, and the industrial reduction gearbox can be divided into a worm and gear reduction gearbox, a planetary reduction gearbox and the like.

Referring to fig. 1 and 2, the conventional gear reduction box comprises a shell 1, wherein a gear reduction mechanism 2 is arranged on the shell 1, an input end of the gear reduction mechanism 2 is connected with a driving motor 3, the driving motor 3 is arranged on the shell 1 in a penetrating manner, and an output end of the gear reduction mechanism 2 is rotatably connected with a first rotating shaft 4; the other end of the rotating shaft I4 is rotatably connected with the shell 1, the rotating shaft I4 is detachably connected with the gear reduction mechanism 2 and the shell 1, a driving gear 5 is sleeved on the rotating shaft I4, and the rotating shaft I4 can drive the driving gear 5 to rotate; the rotating shaft II 6 is rotatably connected to the shell 1, the rotating shaft II 6 is detachably connected with the shell 1, the sector gear 7 is sleeved on the rotating shaft II 6, the sector gear 7 can be driven by the rotating shaft II 6 to rotate, and the sector gear 7 is meshed with the driving gear 5. When the device is used, other devices are connected with the second rotating shaft 6, the driving motor 3 is started, the driving motor 3 drives the first rotating shaft 4 to continuously rotate forwards and backwards through the gear reduction mechanism 2, the driving gear 5 drives the sector gear 7 and the second rotating shaft 6 to continuously rotate forwards and backwards, and in the whole moving process, the driving gear 5 is always meshed with the sector gear 7; the second rotating shaft 6 is connected with other working equipment, so that the other working equipment can also do continuous forward and reverse rotation movement, and the working requirement is met.

The above prior art solutions have the following drawbacks: in the use, the driving gear needs to drive sector gear ceaselessly and do the positive and negative motion, when carrying out the reversal, because sector gear has certain rotational speed, the driving gear need overcome the resistance that sector gear rotated and bring in the twinkling of an eye and do work, and this process can lead to the fact certain impact to driving gear and sector gear, consequently causes the damage of driving gear and sector gear easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a be not enough to prior art exists, the utility model aims at providing a clutch mechanism for reducing gear box gear has the effect that can cushion, thereby protection driving gear and sector gear when the driving gear reversal.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a clutch mechanism for a gear of a reduction gearbox comprises a rotating cylinder and a driving rod, wherein the rotating cylinder is sleeved on a rotating shaft I, the driving rod is arranged on the rotating shaft I, a convex edge is arranged at one end, close to a gear speed reduction mechanism, of the rotating shaft I, the convex edge is located below the rotating cylinder, a connecting hole is formed in the center of the driving gear, the driving gear is sleeved on the rotating cylinder, the inner wall of the connecting hole is attached to the rotating cylinder, the driving gear and the rotating cylinder are fixed relatively, a fan-shaped hole is formed in the driving gear, the fan-shaped hole is a through hole in the vertical direction and communicated with the connecting hole, an arc-shaped hole is formed in the rotating cylinder and is a through hole in the horizontal direction, the driving rod penetrates through the fan-shaped hole and extends into the fan-shaped hole, and the driving rod.

By adopting the technical scheme, when the driving device is used, the driving rod rotates along with the rotating shaft, when the driving rod is contacted with one end face of the fan-shaped hole, the driving rod can drive the driving gear to rotate, and the driving gear and the rotating cylinder can synchronously rotate with the rotating shaft; when the rotating shaft rotates reversely, the driving rod is driven to move towards the other end of the fan-shaped hole, and the driving rod loses the driving effect on the driving gear, namely the fan-shaped gear loses the driving force, so that the rotating speed of the fan-shaped gear can be reduced; after the other end of drive pole and sector hole was contacted, the drive pole can drive the driving gear reversal, and the driving gear can drive sector gear, because sector gear's rotational speed reduced than before this moment, consequently the impact force between driving gear and the sector gear reduces, is difficult to damage, to sum up, the utility model discloses thereby have can cushion when the driving gear reversal, protect driving gear and sector gear's effect.

The present invention may be further configured in a preferred embodiment as: the rotating cylinder comprises an upper sleeve and a lower sleeve, the upper sleeve is laminated with the lower sleeve, the upper half part of the arc-shaped hole is located on the upper sleeve, the lower half part of the arc-shaped hole is located on the lower sleeve, a limiting groove is formed in the outer surface of the joint of the upper sleeve and the lower sleeve, the upper half part of the limiting groove is located on the upper sleeve, the lower half part of the limiting groove is located on the lower sleeve, the driving gear is located in the limiting groove, the inner wall of the connecting hole is laminated with the inner wall of the limiting groove, two limiting blocks are connected with the two ends of the connecting hole and the joint of the fan-shaped hole respectively, and the limiting blocks are laminated with.

By adopting the technical scheme, the upper sleeve and the lower sleeve are matched for use, so that the driving gear is conveniently connected with the rotating cylinder; the limiting groove can limit the driving gear in the vertical direction; the stopper can prevent the driving gear and the rotary cylinder from rotating relatively, so that when the driving rod drives the driving gear to rotate, the rotary cylinder can also rotate along with the driving gear.

The present invention may be further configured in a preferred embodiment as: and a gap is reserved between the limiting block and the first rotating shaft.

By adopting the technical scheme, the limiting block cannot be contacted with the first rotating shaft when the driving gear rotates, so that friction between the limiting block and the first rotating shaft can be avoided, and the resistance on the first rotating shaft is reduced.

The present invention may be further configured in a preferred embodiment as: the utility model discloses a rotation axis, including pivot one, rotation axis and chimb, the one end of keeping away from the chimb is rotated the cover and is equipped with the rotation piece, rotate the piece and establish in pivot one and change epaxial swivel becket one and swivel becket two including the cover, swivel becket two is less than swivel becket one to the distance of chimb, set up the mounting hole with a swivel becket adaptation on the casing, swivel becket one inserts in the mounting hole, the casing is laminated with the upper surface of swivel becket two, rotate piece and casing relatively fixed.

By adopting the technical scheme, after the driving motor is started, the rotating part is kept still, the rotating shaft I rotates in the rotating part, and the rotating part realizes the rotating connection between the rotating shaft I and the shell.

The present invention may be further configured in a preferred embodiment as: the rotating shaft I is sleeved with two gaskets, the two gaskets are respectively positioned between the second rotating ring and the upper sleeve and between the lower sleeve and the convex edge, and the gaskets are wavy circular rings.

By adopting the technical scheme, the gasket avoids direct contact between the upper sleeve and the second rotating ring, between the lower sleeve and the convex edge, and the wavy gasket reduces the contact area between the upper sleeve, the second rotating ring, between the lower sleeve and the convex edge and between the lower sleeve and the gasket, so that the abrasion generated by the upper sleeve, the second rotating ring, the lower sleeve and the convex edge in the rotating process of the first rotating shaft is reduced.

The present invention may be further configured in a preferred embodiment as: the driving rod is connected with the first rotating shaft through threads.

Through adopting above-mentioned technical scheme, be convenient for will drive the pole and be connected and dismantle with pivot one.

The present invention may be further configured in a preferred embodiment as: the part of the driving rod, which is positioned outside the first rotating shaft, is provided with two vertical planes which are parallel to each other.

Through adopting above-mentioned technical scheme, drive pole pivoted in-process, a vertical plane is laminated with an end face in sector hole earlier, and during the reversal, another vertical plane has increased the area of contact of drive pole with sector hole end face with another end face laminating in sector hole, and the dwang of being convenient for drives the driving gear and rotates.

The present invention may be further configured in a preferred embodiment as: and one side of the driving gear, which is far away from the fan-shaped hole, is provided with a plurality of balance holes.

Through adopting above-mentioned technical scheme, improved the even degree of driving gear weight, can be more steady when making the driving gear rotate.

To sum up, the utility model discloses a following beneficial technological effect:

1. the utility model discloses a set up and rotate a section of thick bamboo, drive pole and sector hole, during the use, drive pole follows pivot one and rotates, drive pole earlier with a terminal surface contact in sector hole, drive the synchronous corotation of driving gear and a section of thick bamboo, the driving gear drives sector gear corotation, during the reversal, the terminal surface separation of drive pole and sector hole, and to another terminal surface removal, the dwang can not provide power to the driving gear in the in-process that removes in the sector hole, therefore the rotational speed of driving gear and sector gear all can reduce, after another terminal surface laminating of drive pole and sector hole, the drive pole can drive the driving gear reversal promptly, because the rotational speed of sector gear descends before this moment, therefore the impact force of reversal area for sector gear and driving gear can reduce, thereby reduce the possibility that sector gear and driving gear damaged, therefore the utility model discloses have and can cushion when the driving gear reverses, Thereby protecting the effects of the driving gear and the sector gear;

2. the utility model can reduce the abrasion of the second rotating ring, the upper sleeve, the lower sleeve and the convex edge in the rotating process by arranging the gasket;

3. the utility model discloses a set up the balancing hole, stability when can improving the driving gear rotation.

Drawings

Fig. 1 is a schematic view for embodying the overall structure of a gear reduction box of the background art.

Fig. 2 is a schematic diagram for embodying the structure of a sector gear in the background art.

FIG. 3 is a schematic view showing the overall structure of a clutch mechanism for embodying a reduction gear of the embodiment.

Fig. 4 is a schematic diagram of a structure for embodying a rotary cylinder in the embodiment.

Fig. 5 is a schematic view of a structure for embodying a driving gear in the embodiment.

Fig. 6 is a schematic diagram of a structure for embodying the first rotating shaft in the embodiment.

Fig. 7 is a schematic view for showing the connection relationship of the rotation member and the housing in the embodiment.

In the figure, 1, a housing; 2. a gear reduction mechanism; 3. a drive motor; 4. a first rotating shaft; 5. a driving gear; 6. a second rotating shaft; 7. a sector gear; 8. a rotating cylinder; 81. an upper sleeve; 82. a lower sleeve; 9. driving the rod; 10. a convex edge; 11. connecting holes; 12. a sector hole; 13. an arc-shaped hole; 14. a limiting groove; 15. a rotating member; 151. rotating the ring I; 152. a second rotating ring; 16. a gasket; 17. a vertical plane; 18. a balance hole; 19. a snap ring; 20. and a limiting block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): referring to fig. 3 and 4, the utility model discloses a clutch mechanism of reduction box gear, which comprises a rotary cylinder 8 and a driving rod 9. The rotating cylinder 8 is rotatably sleeved on the first rotating shaft 4, a convex edge 10 is arranged at one end, close to the gear reduction mechanism 2, of the first rotating shaft 4, and the convex edge 10 is located below the rotating cylinder 8. A connecting hole 11 is formed in the center of the driving gear 5, the driving gear 5 is sleeved on the rotating cylinder 8, the inner wall of the connecting hole 11 is attached to the rotating cylinder 8, and the driving gear 5 and the rotating cylinder 8 are fixed relatively.

Referring to fig. 5, the driving gear 5 is provided with a sector hole 12, the sector hole 12 is a through hole in the vertical direction, the sector hole 12 includes two end faces and an arc surface, and one side of the sector hole 12 away from the arc surface is communicated with the connecting hole 11.

Referring to fig. 3 and 4, an arc-shaped hole 13 is formed in the rotating cylinder 8, the arc-shaped hole 13 is a through hole in the horizontal direction, and the arc-shaped hole 13 is located at the connection position of the fan-shaped hole 12 and the connection hole 11. The driving rod 9 is arranged on the first rotating shaft 4, the driving rod 9 is horizontally arranged, the driving rod 9 penetrates through the arc-shaped hole 13 and extends into the fan-shaped hole 12, and a gap is reserved between the driving rod 9 and the arc surface of the fan-shaped hole 12. The driving rod 9 can be respectively contacted with the end surfaces at two ends of the fan-shaped hole 12 in the process of rotating forwards and backwards along with the rotating shaft I4.

Referring to fig. 3 and 4, in the working process, the driving rod 9 rotates forward along with the first rotating shaft 4, the driving rod 9 rotates in the sector hole 12 to be in contact with one end face of the sector hole 12, then the driving gear 5 and the rotating cylinder 8 rotate forward along with the driving rod 9, and meanwhile, the driving gear 5 rotates forward along with the electric sector gear 7; when the first rotating shaft 4 rotates reversely, the driving rod 9 also rotates reversely, the driving rod 9 is firstly separated from the end face of the sector hole 12 and then rotates in the sector hole 12 towards the direction close to the other end face, during the period that the driving rod 9 is separated from the end face of the sector hole 12, the driving rod 9 loses the driving effect on the driving gear 5, so that the rotating speeds of the driving gear 5 and the sector gear 7 can be reduced, the driving rod 9 can finally contact with the other end face of the sector hole 12, then the driving gear 5 is driven to rotate reversely, at the moment, the rotating speeds of the driving gear 5 and the sector gear 7 are reduced relative to the previous rotating speeds, and therefore the impact force between the driving gear 5 and the sector gear 7 during the reverse rotation can be reduced, and the damage of the reverse rotation belt to the driving.

Referring to fig. 4, the rotary cylinder 8 includes an upper sleeve 81 and a lower sleeve 82, and the upper sleeve 81 is attached to the lower sleeve 82. The upper half part of the arc-shaped hole 13 is positioned at the bottom of the upper sleeve 81, the lower half part of the arc-shaped hole 13 is positioned at the top of the lower sleeve 82, and the arc-shaped hole 13 is formed by splicing the upper sleeve 81 and the lower sleeve 82.

Referring to fig. 4, a joint of the upper sleeve 81 and the lower sleeve 82 is provided with a limiting groove 14, the limiting groove 14 is an annular groove, the upper half of the limiting groove 14 is located at the bottom of the upper sleeve 81, the lower half of the limiting groove 14 is located at the top of the lower sleeve 82, and the limiting groove 14 is formed by splicing the upper sleeve 81 and the lower sleeve 82.

Referring to fig. 3 and 4, the driving gear 5 is located in the limiting groove 14, the inner wall of the connecting hole 11 is attached to the inner wall of the limiting groove 14, and the limiting groove 14 can limit the driving gear 5 and prevent the driving gear 5 from sliding on the rotating cylinder 8 in the vertical direction.

Referring to fig. 3 and 5, two ends of a joint of the connecting hole 11 and the fan-shaped hole 12 are respectively connected with two limiting blocks 20, the limiting blocks 20 are arranged towards the center of the connecting hole 11, and the two limiting blocks 20 are respectively attached to the side walls at two ends of the arc-shaped hole 13. Due to the fact that the limiting block 20 is arranged, the driving gear 5 cannot rotate relative to the rotating cylinder 8 (refer to fig. 4), and therefore when the driving rod 9 drives the driving gear 5 to rotate, the rotating cylinder 8 can rotate synchronously along with the driving gear 5. In summary, the arrangement of the limiting groove 14 and the limiting block 20 enables the driving gear 5 and the rotating cylinder 8 to be relatively fixed, and the arrangement of the upper sleeve 81 and the lower sleeve 82 can facilitate the connection of the driving gear 5 and the rotating cylinder 8.

Referring to fig. 3 and 5, a gap is left between the limiting block 20 and the first rotating shaft 4, so that when the driving gear 5 rotates, the limiting block 20 does not contact and rub with the first rotating shaft 4, and the limiting block 20 is prevented from generating an obstructing effect on the rotation of the first rotating shaft 4.

Referring to fig. 4, one end of the first rotating shaft 4 away from the flange 10 is sleeved with a rotating member 15, and the rotating member 15 is rotatably connected with the first rotating shaft 4. The rotating part 15 comprises a first rotating ring 151 and a second rotating ring 152 which are rotatably sleeved on the first rotating shaft 4, the first rotating ring 151 and the second rotating ring 152 are coaxially arranged and welded together, and the distance from the second rotating ring to the convex edge 10 is smaller than the distance from the first rotating shaft to the convex edge 10.

Referring to fig. 7, a mounting hole adapted to the first rotating ring 151 is formed in the housing 1, the mounting hole is a through hole, the first rotating ring 151 is inserted into the mounting hole, the upper surface of the first rotating ring 151 is flush with the outer surface of the housing 1, the inner surface of the housing 1 is attached to and tightly abutted against the upper surface of the second rotating ring 152, and the rotating member 15 is relatively fixed to the housing 1. In the rotating process of the first rotating shaft 4, the rotating part 15 and the shell 1 are kept still, and the first rotating shaft 4 rotates in the rotating part 15, so that the rotating part 15 realizes the rotating connection of the first rotating shaft 4 and the shell 1, and the connection is convenient.

Referring to fig. 4, the top end of the first rotating shaft 4 is connected with the snap ring 19, the snap ring 19 is attached to the upper surface of the first rotating ring 151, and the snap ring 19 can limit the rotating member 15 and prevent the rotating member 15 from falling off from the first rotating shaft 4.

Referring to fig. 4, the first rotating shaft 4 is sleeved with two washers 16 for reducing mutual abrasion between the parts, the two washers 16 are respectively located between the second rotating ring 152 and the upper sleeve 81 and between the lower sleeve 82 and the convex edge 10, and the washers 16 are wavy circular rings. Due to the existence of the gasket 16, direct contact friction between the second rotating ring 152 and the upper sleeve 81, and direct contact friction between the lower sleeve 82 and the convex edge 10 are avoided, and meanwhile, due to the fact that the gasket 16 is wavy, contact friction areas between the second rotating ring 152, the upper sleeve 81, the lower sleeve 82, the convex edge 10 and the gasket 16 can be reduced, so that abrasion between the second rotating ring 152, the upper sleeve 81, the lower sleeve 82, the convex edge 10 and the gasket 16 in the rotating process can be reduced, and a part protecting effect is achieved.

Referring to fig. 6, the driving rod 9 is connected with the first rotating shaft 4 through an external thread, the connection mode enables the driving rod 9 and the first rotating shaft 4 to be detachably connected, and the driving rod 9 is convenient to detach from the first rotating shaft 4 or install the driving rod 9 on the first rotating shaft 4, so that the operation is convenient.

Referring to fig. 3 and 6, the portion of the driving rod 9 located outside the first rotating shaft 4 is provided with two vertical planes 17 which are parallel to each other, in the process that the driving rod 9 rotates forward and backward along with the first rotating shaft 4, one of the vertical planes is firstly attached to one end face of the fan-shaped hole 12 and drives the driving gear 5 to rotate forward, and when the first rotating shaft 4 rotates backward, the other vertical plane is attached to the other end face of the fan-shaped hole 12 and drives the driving gear 5 to rotate backward. The vertical plane 17 increases the contact area between the driving rod 9 and the end surface of the sector hole 12, so that the driving rod 9 can drive the driving gear 5 to rotate more stably.

In addition, the driving rod 9 collides with the end face of the fan-shaped hole 12, and the vertical plane 17 can increase the collision area, so that the pressure intensity born by the driving rod 9 and the driving gear 5 due to collision is reduced, and the effect of protecting the driving rod 9 and the driving gear 5 is achieved.

Referring to fig. 5, since the driving gear 5 is provided with the sector hole 12, the mass distribution of the driving gear 5 becomes uneven, which is not beneficial to the stable rotation of the driving gear 5, in order to alleviate the above problems, a plurality of balance holes 18 are provided on one side of the driving gear 5 away from the sector hole 12, the balance holes 18 are through holes, and the balance holes 18 reduce the weight of one side of the driving gear 5 away from the sector hole 12, so that the mass distribution of the driving gear 5 is more even, thereby improving the stability of the rotation of the driving gear 5.

The implementation principle of the embodiment is as follows: when the first rotating shaft 4 rotates forwards, the driving rod 9 rotates along with the first rotating shaft 4, a vertical plane 17 of the driving rod 9 is attached to one end face of the fan-shaped hole 12, then the driving gear 5 and the rotating cylinder 8 rotate forwards along with the driving rod 9, and the driving gear 5 can drive the fan-shaped gear 7 to rotate; when the first rotating shaft 4 rotates reversely suddenly, the driving rod 9 is separated from the end face of the sector hole 12 firstly, and then the other end face of the sector hole 12 is turned, in the process, as the driving rod 9 is separated from the end face of the sector hole 12, the driving force from the driving rod 9 is lost by the driving gear 5, and therefore the rotating speed of the driving gear 5 and the sector gear 7 can be reduced; after two vertical planes 17 of the driving rod 9 are attached to the other end face of the sector hole 12, the driving rod 9 drives the driving gear 5 to rotate reversely, and the rotating speeds of the driving gear 5 and the sector gear 7 are reduced to some extent compared with the rotating speeds of the driving gear 5 and the sector gear 7, so that the impact force on the driving gear 5 and the sector gear 7 in the reverse rotating process is reduced, and the damage on the driving gear 5 and the sector gear 7 is also reduced. To sum up, the utility model discloses thereby have can cushion, protect driving gear 5 and sector gear 7's effect when driving gear 5 reverses.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. A clutch mechanism for a reduction gearbox gear is characterized in that: comprises a rotating cylinder (8) which is rotatably sleeved on a rotating shaft I (4) and a driving rod (9) which is arranged on the rotating shaft I (4), wherein a convex edge (10) is arranged at one end of the rotating shaft I (4) which is close to a gear reduction mechanism (2), the convex edge (10) is positioned below the rotating cylinder (8), a connecting hole (11) is formed in the center of a driving gear (5), the driving gear (5) is sleeved on the rotating cylinder (8), the inner wall of the connecting hole (11) is attached to the rotating cylinder (8), the driving gear (5) is relatively fixed with the rotating cylinder (8), a fan-shaped hole (12) is formed in the driving gear (5), the fan-shaped hole (12) is a through hole in the vertical direction, the fan-shaped hole (12) is communicated with the connecting hole (11), an arc-shaped hole (13) is formed in the rotating cylinder (8), and the arc-shaped hole (13), the driving rod (9) penetrates through the arc-shaped hole (13) and extends into the fan-shaped hole (12), and the driving rod (9) can be respectively contacted with the end faces at the two ends of the fan-shaped hole (12) in the positive and negative rotation process.

2. A clutch mechanism for reduction gearbox gears according to claim 1 characterised in that: a rotating cylinder (8) includes upper sleeve (81) and lower sleeve (82), upper sleeve (81) and lower sleeve (82) laminating setting, the first half of arc hole (13) is located upper sleeve (81), and the latter half is located lower sleeve (82), spacing groove (14) have been seted up with the surface of lower sleeve (82) laminating department to upper sleeve (81), the first half of spacing groove (14) is located upper sleeve (81), and the latter half is located lower sleeve (82), driving gear (5) are located spacing groove (14), the inner wall of connecting hole (11) and the inner wall laminating of spacing groove (14), connecting hole (11) and the both ends of sector hole (12) junction are connected with two stopper (20), two stopper (20) laminate with the lateral wall at arc hole (13) both ends respectively.

3. A clutch mechanism for reduction gearbox gears according to claim 2 characterised in that: and a gap is reserved between the limiting block (20) and the first rotating shaft (4).

4. A clutching mechanism for a reduction gearbox gear according to claim 3, characterised in that: the one end rotation cover that chimb (10) was kept away from in pivot (4) is equipped with rotates piece (15), rotate piece (15) including the cover establish rotating ring (151) and rotating ring two (152) on pivot (4), rotating ring two (152) are less than rotating ring (151) to the distance of chimb (10), offer the mounting hole with a rotating ring (151) adaptation on casing (1), rotating ring (151) insert in the mounting hole, casing (1) and the upper surface laminating of rotating ring two (152), rotate piece (15) and casing (1) relatively fixed.

5. A clutching mechanism for a reduction gearbox gear according to claim 4, characterised in that: the rotating shaft I (4) is sleeved with two gaskets (16), the gaskets (16) are respectively positioned between the rotating ring II (152) and the upper sleeve (81) and between the lower sleeve (82) and the convex edge (10), and the gaskets (16) are wavy rings.

6. A clutch mechanism for reduction gearbox gears according to claim 1 characterised in that: the driving rod (9) is connected with the first rotating shaft (4) through threads.

7. A clutch mechanism for reduction gearbox gears according to claim 1 characterised in that: the part of the driving rod (9) outside the first rotating shaft (4) is provided with two vertical planes (17) which are parallel to each other.

8. A clutch mechanism for reduction gearbox gears according to claim 1 characterised in that: and a plurality of balance holes (18) are formed in one side of the driving gear (5) far away from the fan-shaped hole (12).

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