CN219853992U - Rotary locking mechanism - Google Patents

Abstract

The utility model discloses a rotary locking mechanism, comprising: a base; the helical gear cylinder is arranged on the base, and a plurality of first helical gears are circumferentially arranged on the inner side surface of the helical gear cylinder; one end of the helical tooth rotating shaft is provided with a plurality of second helical teeth which are matched with the first helical teeth; the rotary drum is sleeved on the helical gear rotating shaft in a sliding manner and synchronously rotates along with the helical gear rotating shaft; the elastic piece is arranged between the helical tooth rotating shaft and the base, so that the second helical tooth of the helical tooth rotating shaft is meshed with the first helical tooth of the helical tooth cylinder; one end of the pushing piece is slidably arranged in the helical gear barrel, a plurality of third helical gears are arranged, so that the second helical gears are pushed by the third helical gears to be disengaged from the first helical gears, and when the helical gear rotating shaft is reset under the action of the elastic piece, the second helical gears are engaged with the adjacent other first helical gears again, so that the helical gear rotating shaft drives the rotary drum to rotate. According to the rotary locking mechanism, the pushing piece is pushed periodically, so that the rotary drum drives the abrasive paper to rotate periodically, the position of the abrasive paper can be adjusted instead of manually without stopping, the working efficiency is improved, and the labor cost is reduced.

Description

Rotary locking mechanism

Technical Field

The utility model relates to the technical field of polishing equipment, in particular to a rotary locking mechanism.

Background

At present, when a product needs to be polished, the arc-shaped backboard is usually used for fixing sand paper, then the arc-shaped backboard is arranged on a manipulator, and the manipulator drives the arc-shaped backboard and the sand paper to move so as to polish the product. Because the gravel on the sand paper can be ground or fall off after polishing the product, the position of the sand paper on the arc-shaped backboard needs to be manually adjusted to effectively polish the product. However, because the position of the abrasive paper on the arc-shaped backboard cannot be automatically adjusted, frequent shutdown is required to manually adjust the position of the abrasive paper on the arc-shaped backboard, so that the working efficiency is low and the labor cost is high.

Disclosure of Invention

In view of the above, it is necessary to provide a rotary locking mechanism to realize a function of adjusting the position of the coated abrasive, reduce the number of times of manually adjusting the position of the coated abrasive, improve the working efficiency, and reduce the labor cost.

The embodiment of the utility model provides a rotary locking mechanism, which comprises the following components: a base; the helical gear cylinder is arranged on the base, and a plurality of first helical gears are circumferentially arranged on the inner side surface of the helical gear cylinder; the helical tooth rotating shaft is movably arranged on the base, one end of the helical tooth rotating shaft is provided with a plurality of second helical teeth, the second helical teeth are matched with the first helical teeth, and one end of the helical tooth rotating shaft is arranged in the helical tooth cylinder; the rotary drum is sleeved on the helical gear rotating shaft in a sliding manner and synchronously rotates along with the helical gear rotating shaft; the elastic piece is arranged between the other end of the helical gear rotating shaft and the base, and two ends of the elastic piece are respectively abutted against the other end of the helical gear rotating shaft and the base so as to enable the second helical gear of the helical gear rotating shaft to be meshed with the first helical gear of the helical gear cylinder; the pushing piece is arranged in the helical gear cylinder in a sliding manner, a plurality of third helical gears are arranged at one end of the pushing piece, the second helical gears are pushed to be disengaged from the first helical gears through the third helical gears, and when the helical gear rotating shaft is reset under the action of the elastic piece, the second helical gears are engaged with the adjacent other first helical gears again, so that the helical gear rotating shaft drives the rotating drum to rotate.

When the rotary locking mechanism is used, the second helical teeth of the helical tooth rotating shaft are meshed with the first helical teeth of the helical tooth cylinder under the elastic action of the elastic piece before the pushing piece is pushed, so that the helical tooth rotating shaft and the rotary drum cannot rotate relative to the base. By pushing the pushing piece, the pushing piece slides in the helical gear barrel and pushes the helical gear rotating shaft to move away from the helical gear barrel, the helical gear rotating shaft moves relative to the rotary drum and extrudes the elastic piece, the elastic piece generates elasticity, the third helical gear of the pushing piece pushes the second helical gear of the helical gear rotating shaft to be away from the first helical gear of the helical gear barrel so that the second helical gear is disengaged from the first helical gear, when the second helical gear is disengaged from the first helical gear, the elastic piece releases elasticity to be elastically restored and enables the second helical gear to be re-engaged with the adjacent first helical gear, and the second helical gear is re-engaged with the other helical gear so that the helical gear rotating shaft rotates to drive the rotary drum to rotate through the helical gear rotating shaft, so that the rotary drum is rotated and locking function is realized. According to the rotary locking mechanism provided by the embodiment of the utility model, the abrasive paper can be stuck on the rotary drum, and the pushing piece is pushed periodically, so that the rotary drum drives the abrasive paper to rotate periodically, the position of the abrasive paper can be adjusted instead of manually without stopping, the times of manually adjusting the position of the abrasive paper can be reduced, the work efficiency can be improved, and the labor cost can be reduced.

In some embodiments, the inclined surface of the third helical tooth is parallel to the inclined surface of the first helical tooth, and the inclined surface of the third helical tooth abuts the inclined surface portion of the first helical tooth when the third helical tooth pushes the second helical tooth out of engagement with the first helical tooth.

In some embodiments, the third helical tooth is located inside the circumference of the first helical tooth enclosure, and the thickness of the second helical tooth is greater than that of the first helical tooth in the radial direction of the helical tooth rotating shaft, so that the third helical tooth does not interfere with the first helical tooth and can push against the second helical tooth when the pushing piece slides inside the helical tooth cylinder.

In some embodiments, the first helical tooth includes a first straight portion and a first helical tooth portion, the first helical tooth portion and the first straight portion being an end of the first helical tooth facing toward the helical tooth rotation shaft and an end facing away from the helical tooth rotation shaft, respectively, the second helical tooth includes a second straight portion and a second helical tooth portion, the second helical tooth portion and the second straight portion being an end of the second helical tooth facing toward the helical tooth barrel and an end facing away from the helical tooth barrel, respectively, to stabilize the first helical tooth and the second helical tooth engagement.

In some embodiments, the inner side surface of the rotary drum is circumferentially provided with a plurality of first protruding parts, and the outer side surface of the helical gear rotary shaft is circumferentially provided with a plurality of second protruding parts, wherein any one of the second protruding parts is positioned between two adjacent first protruding parts.

In some embodiments, the base includes bottom plate, first connecting seat, second connecting seat and axis of rotation, first connecting seat with the second connecting seat interval is located on the bottom plate, first connecting seat with the second connecting seat is connected respectively at the both ends of axis of rotation, the skewed tooth pivot rotation cover is located the axis of rotation, the elastic component cover is located the axis of rotation just is located the skewed tooth pivot the other end with between the second connecting seat, the elastic component butt respectively the skewed tooth pivot the other end with the second connecting seat, skewed tooth section of thick bamboo cover is located the outside of axis of rotation just is located first connecting seat with between the skewed tooth pivot, the one end slip of pushing away the piece is worn to locate in the skewed tooth section of thick bamboo.

In some embodiments, the rotary locking mechanism further comprises a guide cylinder, the guide cylinder is connected with the helical gear cylinder and is away from the helical gear rotating shaft, a through first avoiding opening is formed in the cylinder wall of the guide cylinder, the guide cylinder is arranged around the first connecting seat through the first avoiding opening, and the pushing member slides through the guide cylinder.

In some embodiments, the pushing member is cylindrical, a second avoiding opening is formed in a cylinder wall of the pushing member, the pushing member is disposed around the first connecting seat through the second avoiding opening, and the sliding degree of the first connecting seat to the pushing member is limited.

In some embodiments, an embedded hole is formed on a side, facing the helical tooth rotating shaft, of the second connecting seat, the rotating shaft is inserted into the embedded hole, and the elastic piece is abutted to the embedded hole.

In some embodiments, the rotary locking mechanism further comprises a driving member for driving the pushing member to push the helical gear shaft to move.

Drawings

Fig. 1 is a schematic perspective view of a rotary locking mechanism according to an embodiment of the present utility model.

Fig. 2 is an exploded view of the rotary lock mechanism shown in fig. 1.

Fig. 3 is a schematic view of an exploded view of the rotary lock mechanism shown in fig. 1 at another angle.

FIG. 4 is a schematic cross-sectional view of the rotary lock mechanism of FIG. 1 taken along line IV-IV.

Fig. 5 is a schematic cross-sectional view of the rotary lock mechanism of fig. 1 with the second helical tooth disengaged from the first helical tooth.

Fig. 6 is a schematic cross-sectional view of the second helical tooth of the rotary lock mechanism shown in fig. 1 as it falls back along the third helical tooth.

Fig. 7 is a schematic cross-sectional view of a second helical tooth of the rotary lock mechanism shown in fig. 1 reengaging with another first helical tooth.

Description of the main reference signs

Rotating lock mechanism 100

Base 10

Bottom plate 12

First connecting seat 14

Second connecting seat 16

Embedded hole 162

Rotating shaft 18

Helical gear barrel 20

First helical tooth 22

First straight line portion 222

First helical tooth portion 224

Mounting base 24

Helical gear shaft 30

Second helical tooth 32

Second straight line portion 322

Second helical tooth portion 324

Second boss 34

Drum 40

First boss 42

Elastic member 50

Push member 60

Third helical tooth 62

Second relief port 64

Guide cylinder 70

First relief port 72

Drive member 80

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In the description of the present utility model, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, it is to be noted that the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the two components can be connected in a mechanical mode, can be electrically connected or can be communicated with each other, can be directly connected, can be indirectly connected through an intermediate medium, and can be communicated with each other inside the two components or can be in interaction relation with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Some embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, a rotary lock mechanism 100 is provided in an embodiment of the present utility model. Referring to fig. 2 and 3 in combination, the rotary lock mechanism 100 includes a base 10, a helical gear drum 20, a helical gear shaft 30, a drum 40, an elastic member 50, and a pushing member 60. Where "cartridge" means a generally cylindrical structure with a hollow interior and open ends or either end.

Specifically, the base 10 is configured to intensively carry the helical gear drum 20, the helical gear rotating shaft 30, the drum 40, the elastic member 50, and the pushing member 60, so that the rotary locking mechanism 100 is intensively disposed. The helical gear barrel 20 is arranged on the base 10, and a plurality of first helical gears 22 are circumferentially arranged on the inner side surface of the helical gear barrel 20, and the plurality of first helical gears 22 are uniformly distributed. The helical gear rotating shaft 30 is movably arranged on the base 10, one end of the helical gear rotating shaft 30 is provided with a plurality of second helical gears 32, the second helical gears 32 are uniformly distributed around the rotating axis of the helical gear rotating shaft 30, the second helical gears 32 are matched with the first helical gears 22, one end of the helical gear rotating shaft 30 is arranged in the helical gear barrel 20, the number of the second helical gears 32 can be equal to or unequal to the number of the first helical gears 22, and the helical gear rotating shaft 30 can slide and rotate on the base 10. The rotary drum 40 is slidably sleeved on the helical gear rotating shaft 30, and can synchronously rotate along with the helical gear rotating shaft 30. The elastic member 50 is disposed between the other end of the helical gear shaft 30 and the base 10, and two ends of the elastic member 50 respectively abut against the other end of the helical gear shaft 30 and the base 10, so that the second helical gear 32 of the helical gear shaft 30 is engaged with the first helical gear 22 of the helical gear barrel 20 under the pre-tightening elastic force of the elastic member 50, and in this embodiment, the elastic member 50 is a spring. One end of the pushing member 60 is slidably disposed in the helical gear barrel 20, one end of the pushing member 60 is provided with a plurality of third helical teeth 62, when the pushing member 60 is pushed to move towards the helical gear rotating shaft 30, the second helical teeth 32 are pushed to be disengaged from the first helical teeth 22 by the third helical teeth 62, and when the helical gear rotating shaft 30 is reset under the action of the elastic member 50, the second helical teeth 32 are re-engaged with the adjacent other first helical teeth 22, so that the helical gear rotating shaft 30 drives the rotary drum 40 to rotate, the plurality of third helical teeth 62 are uniformly distributed, and the number of the third helical teeth 62 is equal to that of the first helical teeth 22.

The operation of the rotary lock mechanism 100 of the present embodiment is described in detail below with reference to fig. 4 to 7.

Referring to fig. 4, before pushing the pushing member 60, under the pre-tightening elastic force of the elastic member 50, the elastic member 50 pushes the helical gear shaft 30 toward the helical gear barrel 20, so that the second helical gear 32 of the helical gear shaft 30 is engaged with the first helical gear 22 of the helical gear barrel 20, and the helical gear shaft 30 and the rotary barrel 40 are not rotated on the base 10 due to the engagement of the second helical gear 32 of the helical gear shaft 30 with the first helical gear 22 of the helical gear barrel 20. In this manner, sanding of the workpiece is accomplished by reciprocal movement of the sandpaper secured to the outer periphery of the drum 40 relative to the workpiece, such as reciprocal movement of both along the axis of the drum 40. After a period of sandpaper has been used, the generally elongated portion of the sandpaper on the drum 40 that is in contact with the workpiece is severely worn out, and it is necessary to rotate the drum 40 at an angle such that the other portion of the sandpaper on the drum 40 is directed toward the workpiece to continue sanding and polishing the workpiece.

Referring to fig. 5, the pushing member 60 is pushed toward the elastic member 50, the pushing member 60 slides in the helical gear barrel 20 and pushes the helical gear shaft 30 to move away from the helical gear barrel 20, the helical gear shaft 30 moves relative to the barrel 40 and presses the elastic member 50, the elastic member 50 generates a larger pre-tightening elastic force, and the third helical gear 62 of the pushing member 60 pushes the second helical gear 32 of the helical gear shaft 30 away from the first helical gear 22 of the helical gear barrel 20 so as to disengage the second helical gear 32 from the first helical gear 22.

Referring to fig. 6, when the second helical tooth 32 of the helical tooth rotating shaft 30 is disengaged from the first helical tooth 22 of the helical tooth drum 20, the pre-tightening elastic force of the elastic member 50 releases and pushes the helical tooth rotating shaft 30 toward the helical tooth drum 20, and the helical tooth rotating shaft 30 rotates by a small angle through the engagement of the second helical tooth 32 with the inclined surface of the third helical tooth 62 of the pushing member 60, so that the second helical tooth 32 of the helical tooth rotating shaft 30 overlaps the first helical tooth 22 of the helical tooth drum 20, which is originally engaged, along the rotating axis of the rotating drum 40, to facilitate the re-engagement of the second helical tooth 32 with the other first helical tooth 22.

Referring to fig. 7, the pushing force to the pushing member 60 is removed, the pushing member 60 no longer applies a force to the helical gear rotating shaft 30, the pre-tightening elastic force of the elastic member 50 is released, and pushes the helical gear rotating shaft 30 and the pushing member 60 towards the direction of the helical gear drum 20, meanwhile, under the matching of the inclined surfaces of the second helical gear 32 of the helical gear rotating shaft 30 and the first helical gear 22 of the helical gear drum 20, the helical gear rotating shaft 30 moves towards the helical gear drum 20 and rotates to drive the rotating drum 40 until the second helical gear 32 is meshed with the adjacent other first helical gear 22 (refer to fig. 3), wherein the pushing member 60 is reset under the pushing of the helical gear rotating shaft 30, thereby realizing the function of driving the rotating drum 40 to rotate by a predetermined angle. This allows the other portions of the sandpaper on the drum 40 to be used toward the workpiece to continue sanding and polishing the workpiece.

The rotary locking mechanism 100 can automatically adjust the position of the sand paper when being used for polishing products, can replace manual adjustment of the position of the sand paper without stopping, is beneficial to reducing the times of manual adjustment of the position of the sand paper, is beneficial to improving the working efficiency and reduces the labor cost.

In this embodiment, the number of the first helical teeth 22 and the third helical teeth 62 is eight, the number of the second helical teeth 32 is four, and accordingly, the angle of each rotation of the helical teeth rotating shaft 30 and the drum 40 is affected by the number of the first helical teeth 22, and since the number of the first helical teeth 22 is eight in this embodiment, the angle of each rotation of the helical teeth rotating shaft 30 and the drum 40 is 45 °. In other embodiments, the number of second helical teeth 32 may also be one, two, three, five, six, seven, or eight. The number of first helical teeth 22 and third helical teeth 62 may also be greater or lesser, for example, six for each of the first helical teeth 22 and third helical teeth 62, and accordingly, 60 ° for each rotation of the helical tooth rotation shaft 30 and drum 40. For another example, the number of first helical teeth 22 and third helical teeth 62 is twelve, and accordingly, the helical teeth shaft 30 and drum 40 each rotate at an angle of 30 °. It will be appreciated that the number of second helical teeth 32 should be less than or equal to the number of first helical teeth 22 and third helical teeth 62.

In the present embodiment, the inclined surface of the third helical tooth 62 is parallel to the inclined surface of the first helical tooth 22, and when the third helical tooth 62 pushes the second helical tooth 32 out of engagement with the first helical tooth 22, the inclined surface of the third helical tooth 62 abuts against the inclined surface portion of the first helical tooth 22. In this way, by defining the positional relationship between the first helical gear 22 and the third helical gear 62, when the third helical gear 62 pushes the second helical gear 32 out of engagement with the first helical gear 22, the second helical gear 32 can be caused to fall back along the inclined surface of the third helical gear 62 to a position where it can abut against the inclined surface of the first helical gear 22 by abutment of the inclined surface of the third helical gear 62 with the inclined surface portion of the first helical gear 22, thereby ensuring that the second helical gear 32 can be reengaged with the adjacent other first helical gear 22 after being disengaged from the first helical gear 22. The abutment is understood to mean that the two abut against each other, and that a gap exists between the two.

In this embodiment, the third helical tooth 62 is approximately triangular, a V-shaped area is formed between two adjacent third helical teeth 62, when the second helical tooth 32 is not disengaged from the first helical tooth 22, the top end of the second helical tooth 32 abuts against the inclined surface of the third helical tooth 62, when the third helical tooth 62 abuts against the second helical tooth 32 and is disengaged from the first helical tooth 22, the first helical tooth 22 does not limit the rotation of the second helical tooth 32 any more, the top end of the second helical tooth 32 slides along the inclined surface of the third helical tooth 62 to the top angle of the V-shaped area to realize rotation, and at this time, the top end of the second helical tooth 32 corresponds to the inclined surface of the first helical tooth 22, so when the pushing force of the abutting member 60 is removed, the third helical tooth 62 no longer abuts against the second helical tooth 32, the second helical tooth 32 moves towards the first helical tooth 22 under the pushing of the elastic member 50, and the top end of the second helical tooth 32 corresponds to the inclined surface of the first helical tooth 22, so that when the second helical tooth 32 and the first helical tooth 22 start to slide along the inclined surface of the second helical tooth 22 and the second helical tooth 22 again to realize rotation along the inclined surface of the first helical tooth 22, and the second helical tooth 22 can continue to realize the rotation along the inclined surface of the second helical tooth 22. In addition, the V-shaped area formed between the third helical teeth 62 forms a stop for the second helical teeth 32, so that the second helical teeth 32 are prevented from falling back under the action of the pre-tightening elastic force of the elastic member 50, the rotation speed of the helical tooth rotating shaft 30 is prevented from being too fast, the rotation speed of the helical tooth rotating shaft 30 is slowed down, and the service life of the rotary locking mechanism 100 is prolonged.

In this embodiment, the third helical tooth 62 is located inside the circumference enclosed by the first helical tooth 22, and in the radial direction of the helical tooth rotating shaft 30, the thickness of the second helical tooth 32 is greater than that of the first helical tooth 22, so that when the pushing member 60 slides inside the helical tooth barrel 20, the third helical tooth 62 does not interfere with the first helical tooth 22 and can push the second helical tooth 32, so that the second helical tooth 32 can respectively abut against the first helical tooth 22 and the third helical tooth 62, and the stability of the rotary locking mechanism 100 during operation is improved.

In this embodiment, the first helical gear 22 includes a first straight line portion 222 and a first helical gear portion 224, the first helical gear portion 224 and the first straight line portion 222 are an end of the first helical gear 22 facing the helical gear shaft 30 and an end facing away from the helical gear shaft 30, and a side of the first helical gear portion 224 facing the helical gear shaft 30 has an inclined surface. The second helical gear 32 includes a second straight portion 322 and a second helical gear portion 324, the second helical gear portion 324 and the second straight portion 322 are an end of the second helical gear 32 facing the helical gear barrel 20 and an end facing away from the helical gear barrel 20, and a side of the second helical gear portion 324 facing the helical gear barrel 20 has an inclined surface. In this way, by defining the specific structures of the first helical teeth 22 and the second helical teeth 32, the helical teeth rotating shaft 30 rotates through the inclined plane matching of the first helical teeth 22 and the second helical teeth 32, and a relatively stable locking effect can be realized between the first helical teeth 22 and the second helical teeth 32 when the first linear portion 222 and the second linear portion 322 are meshed with each other, so that the phenomenon that the first helical teeth 22 and the second helical teeth 32 are easily separated from meshing with each other to rotate with each other is avoided.

In this embodiment, the inner side surface of the drum 40 is uniformly provided with a plurality of first protrusions 42, and the outer side surface of the helical gear shaft 30 is uniformly provided with a plurality of second protrusions 34, wherein any one of the second protrusions 34 is located between two adjacent first protrusions 42. In the present embodiment, the number of the first protrusions 42 is eight, and the number of the second protrusions 34 is four. Thus, by providing the drum 40 with the first protrusions 42 and providing the helical gear shaft 30 with the second protrusions 34, the second protrusions 34 are located between two adjacent first protrusions 42, on one hand, the helical gear shaft 30 moves between two adjacent first protrusions 42 through the second protrusions 34 to slide relative to the drum 40, and on the other hand, the helical gear shaft 30 drives the adjacent first protrusions 42 to rotate through the second protrusions 34, so as to drive the drum 40 to rotate.

In this embodiment, the base 10 includes a base plate 12, a first connecting base 14, a second connecting base 16, and a rotation shaft 18. Specifically, the first connecting seat 14 and the second connecting seat 16 are arranged on the bottom plate 12 at intervals, two ends of the rotating shaft 18 are respectively connected with the first connecting seat 14 and the second connecting seat 16, the helical tooth rotating shaft 30 is rotationally sleeved on the rotating shaft 18, the elastic piece 50 is sleeved on the rotating shaft 18 and is positioned between the other end of the helical tooth rotating shaft 30 and the second connecting seat 16, the elastic piece 50 is respectively abutted against the other end of the helical tooth rotating shaft 30 and the second connecting seat 16, the helical tooth barrel 20 is sleeved on the outer side of the rotating shaft 18 and is positioned between the first connecting seat 14 and the helical tooth rotating shaft 30, and one end of the pushing piece 60 is slidably arranged in the helical tooth barrel 20. Thus, by defining the specific structure of the base 10, the base 10 performs the functions of carrying the helical gear drum 20, the helical gear shaft 30, the drum 40, the elastic member 50, and the pushing member 60. The helical gear rotating shaft 30 is movably sleeved on the rotating shaft 18, so that the helical gear rotating shaft 30 can slide along the rotating shaft 18 on one hand and can rotate around the rotating shaft 18 on the other hand. The first and second connection seats 14 and 16 are fixed to the base plate 12 by screws.

In this embodiment, the helical gear 20 further has a mounting base 24, and the helical gear 20 is fixed on the base plate 12 by the mounting base 24 and screws.

In this embodiment, the rotary locking mechanism 100 further includes a guide cylinder 70, where the guide cylinder 70 is connected to the helical gear cylinder 20 and departs from the helical gear rotating shaft 30, a through first avoiding opening 72 (see fig. 3) is formed in a cylinder wall of the guide cylinder 70, and the guide cylinder 70 is disposed around the first connecting seat 14 through the first avoiding opening 72, and the pushing member 60 slides through the guide cylinder 70. In this way, by providing the guide cylinder 70 and providing the first avoiding opening 72 in the guide cylinder 70, the pushing member 60 is guided by the guide cylinder 70, and the pushing accuracy of the pushing member 60 is ensured. The guide cylinder 70 and the helical gear cylinder 20 may be integrally formed, or may be connected together by welding, bonding, or the like.

In this embodiment, the pushing member 60 is cylindrical, the cylinder wall of the pushing member 60 is provided with a second avoiding opening 64 (see fig. 3), two sides of the second avoiding opening 64 are provided with cylinder walls, one end of the pushing member 60 is provided with an opening and a plurality of third helical teeth 62, the other end of the pushing member 60 is of a closed structure, the pushing member 60 is arranged around the first connecting seat 14 through the second avoiding opening 64, and the sliding degree of the pushing member 60 is limited by the first connecting seat 14. Thus, by providing the second avoidance port 64 on the pushing member 60, the pushing member 60 can be disposed around the first connecting seat 14, so that the pushing member 60 performs the function of sliding through the guide cylinder 70 and the first connecting seat 14 and being located between the guide cylinder 70 and the first connecting seat 14; by limiting the shape of the second avoiding opening 64, that is, the two sides of the second avoiding opening 64 are provided with cylinder walls, the first connecting seat 14 limits the sliding degree of the pushing member 60, on one hand, the elastic member 50 is prevented from being permanently deformed due to excessive pushing of the pushing member 60 by the helical gear rotating shaft 30, so that the rotating and locking functions of the rotating and locking mechanism 100 cannot be effectively realized, and on the other hand, the pushing member 60 is prevented from being separated from the guide cylinder 70 and the helical gear cylinder 20, so that the rotating and locking mechanism 100 cannot be normally used. By defining the other end of the push member 60 as a closed structure, the push member 60 is facilitated to move.

In this embodiment, an embedded hole 162 is formed on a side of the second connecting seat 16 facing the helical gear shaft 30, the rotating shaft 18 is inserted into the embedded hole 162, and the elastic member 50 abuts against the embedded hole 162. In this embodiment, the embedded hole 162 may be a two-stage stepped blind hole, and the rotation shaft 18 and the elastic member 50 respectively abut against different steps. Thus, by defining the second connecting seat 16 to have the embedded hole 162, on one hand, the rotation shaft 18 and the elastic member 50 are conveniently arranged, and on the other hand, the second connecting seat 16 is provided with the embedded hole 162, so that the elastic member 50 is embedded in the second connecting seat 16, and the elastic member 50 is prevented from being separated from the space between the second connecting seat 16 and the helical tooth rotation shaft 30.

In this embodiment, in order to improve the automation degree of the rotary locking mechanism 100, the rotary locking mechanism 100 further includes a driving member 80 (see fig. 1), where the driving member 80 is disposed opposite to the pushing member 60, and the driving member 80 is used to drive the pushing member 60 to move, so that the helical gear shaft 30 is pushed by the pushing member 60 to move along the rotation shaft 18. In this embodiment, the driving member 80 may be a linear cylinder. In this way, by providing the rotary locking mechanism 100 including the driving member 80, the driving member 80 can push the pushing member 60 according to a preset track and a preset period according to a preset program, so that the drum 40 periodically rotates, and the degree of automation of the rotary locking mechanism 100 is further improved. The output shaft of the driving member 80 may or may not be directly or indirectly connected to the pushing member 60. When the driving member 80 is directly or indirectly connected with the pushing member 60, the driving member 80 drives the pushing member 60 to move close to and away from the helical gear rotating shaft 30; when the driving member 80 is not connected with the pushing member 60, the driving member 80 drives the pushing member 60 to move close to the helical gear rotating shaft 30, and the pushing member 60 is reset by the acting force of the elastic member 50 and the helical gear rotating shaft 30.

The rotary locking mechanism 100 provided by the embodiment of the utility model can be used for pasting sand paper to polish products, the pushing piece 60 is pushed by the driving piece 80 periodically according to a preset track, so that the rotary drum 40 drives the sand paper to rotate periodically, the position of the sand paper for polishing the products is automatically adjusted, the position of the sand paper can be adjusted instead of manual operation without stopping the machine, the manual operation is replaced, the labor for simply and repeatedly adjusting the position of the sand paper is reduced, the work efficiency is improved, the labor cost is reduced, the times of entering and exiting the work area of a machine by personnel can be reduced, and the potential safety hazard is reduced.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.

Claims (10)

1. A rotary lock mechanism, comprising:

a base;

the helical gear cylinder is arranged on the base, and a plurality of first helical gears are circumferentially arranged on the inner side surface of the helical gear cylinder;

the helical tooth rotating shaft is movably arranged on the base, one end of the helical tooth rotating shaft is provided with a plurality of second helical teeth, the second helical teeth are matched with the first helical teeth, and one end of the helical tooth rotating shaft is arranged in the helical tooth cylinder;

the rotary drum is sleeved on the helical gear rotating shaft in a sliding manner and synchronously rotates along with the helical gear rotating shaft;

the elastic piece is arranged between the other end of the helical gear rotating shaft and the base, and two ends of the elastic piece are respectively abutted against the other end of the helical gear rotating shaft and the base so as to enable the second helical gear of the helical gear rotating shaft to be meshed with the first helical gear of the helical gear cylinder;

the pushing piece is arranged in the helical gear cylinder in a sliding manner, a plurality of third helical gears are arranged at one end of the pushing piece, the second helical gears are pushed to be disengaged from the first helical gears through the third helical gears, and when the helical gear rotating shaft is reset under the action of the elastic piece, the second helical gears are engaged with the adjacent other first helical gears again, so that the helical gear rotating shaft drives the rotating drum to rotate.

2. The rotary locking mechanism of claim 1, wherein the inclined surface of the third helical tooth is parallel to the inclined surface of the first helical tooth, and wherein the inclined surface of the third helical tooth abuts the inclined surface portion of the first helical tooth when the third helical tooth abuts the second helical tooth to disengage from the first helical tooth.

3. The rotary lock mechanism according to claim 1, wherein the third helical tooth is located inside a circumference of the first helical tooth peripheral wall, and a thickness of the second helical tooth is larger than a thickness of the first helical tooth in a radial direction of the helical tooth rotation shaft, so that the third helical tooth does not interfere with the first helical tooth and can push against the second helical tooth when the push member slides inside the helical tooth cylinder.

4. The rotary lock mechanism according to claim 1, wherein the first helical tooth includes a first straight line portion and a first helical tooth portion, the first helical tooth portion and the first straight line portion being an end of the first helical tooth facing toward the helical tooth rotation shaft and an end facing away from the helical tooth rotation shaft, respectively, the second helical tooth includes a second straight line portion and a second helical tooth portion, the second helical tooth portion and the second straight line portion being an end of the second helical tooth facing toward the helical tooth cylinder and an end facing away from the helical tooth cylinder, respectively, to stabilize engagement of the first helical tooth and the second helical tooth.

5. The rotary locking mechanism of claim 1, wherein the inner side surface of the drum is circumferentially provided with a plurality of first protrusions, and the outer side surface of the helical gear shaft is circumferentially provided with a plurality of second protrusions, wherein any one of the second protrusions is located between two adjacent first protrusions.

6. The rotary locking mechanism of claim 1, wherein the base comprises a bottom plate, a first connecting seat, a second connecting seat and a rotating shaft, the first connecting seat and the second connecting seat are arranged on the bottom plate at intervals, two ends of the rotating shaft are respectively connected with the first connecting seat and the second connecting seat, the helical tooth rotating shaft is rotationally sleeved on the rotating shaft, the elastic piece is sleeved on the rotating shaft and is positioned between the other end of the helical tooth rotating shaft and the second connecting seat, the elastic piece is respectively abutted against the other end of the helical tooth rotating shaft and the second connecting seat, the helical tooth barrel is sleeved on the outer side of the rotating shaft and is positioned between the first connecting seat and the helical tooth rotating shaft, and one end of the pushing piece is slidably arranged in the helical tooth barrel in a penetrating manner.

7. The rotary locking mechanism of claim 6, further comprising a guide cylinder, wherein the guide cylinder is connected with the helical gear cylinder and is away from the helical gear rotating shaft, a through first avoiding opening is formed in the cylinder wall of the guide cylinder, the guide cylinder is arranged around the first connecting seat through the first avoiding opening, and the pushing member slides through the guide cylinder.

8. The rotary locking mechanism as recited in claim 7, wherein the pushing member is cylindrical, a second avoiding opening is formed in a wall of the pushing member, the pushing member is disposed around the first connecting seat through the second avoiding opening, and the sliding degree of the first connecting seat on the pushing member is limited.

9. The rotary lock mechanism according to claim 6, wherein a side of the second connection seat facing the helical gear rotating shaft is provided with an embedded hole, the rotating shaft is inserted into the embedded hole, and the elastic member abuts against the embedded hole.

10. The rotary locking mechanism of claim 1, further comprising a driving member for driving the pushing member to push the helical gear shaft.