CN211369848U

CN211369848U - Compact automatic locking device that falls of single linking gear separation and reunion

Info

Publication number: CN211369848U
Application number: CN201921151119.3U
Authority: CN
Inventors: 余秋民
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-08-28
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a compact automatic lock-falling device of single-linking gear clutch, which comprises a shell, a handle motor, a speed-reducing gear group, a clutch mechanism, a linking gear piece, a rotating piece and a linking piece; the handle motor is arranged in the first mounting cavity of the shell, and the output end of the handle motor extends towards the second mounting cavity of the shell; the clutch mechanism, the connecting tooth plates and the rotating piece are sequentially arranged on the right side of the second mounting cavity in a straight line in the extending direction of the output end of the handle motor, the speed reducing tooth group is assembled at the upper end of the second mounting cavity, and the plurality of speed reducing tooth plates of the speed reducing tooth group are arranged in a triangular shape; the connecting piece is movably arranged at the opening and connected with the rotating piece. Therefore, the speed reduction tooth groups are arranged in a triangular structure, so that the whole automatic lock falling device is more compact in structure; the size of the automatic locking device can be greatly reduced by means of the reasonable layout while the torque is guaranteed, so that the automatic locking device can be assembled in a frame body of a window, and the attractiveness of the window is improved.

Description

Compact automatic locking device that falls of single linking gear separation and reunion

Technical Field

The utility model belongs to the technical field of the intelligence house technique and specifically relates to indicate a single compact automatic locking device that falls who links up gear separation and reunion.

Background

With the rapid development of science and technology, the life concept of people is gradually changed. Various home appliances are also changing. Due to the continuous maturity of single chip microcomputer technology and computer technology, household appliances are more and more intelligent. Windows are no exception, and electric smart windows are widely used in developed countries such as europe and the united states. The intelligent window in the current market not only can realize the automatic opening and closing function, but also can realize the automatic locking function; the automatic locking function generally adopts the automatic locking device to complete the locking action, and the automatic locking device can ensure that the locking process can reliably run only by ensuring enough torque because the inner space of the frame body of the window is smaller. Therefore, it is one of the important problems that those skilled in the art need to solve to reasonably arrange the positions of the components of the automatic locking device, and reduce the size of the whole device while ensuring the torque, so that the device can be assembled in the frame of the window.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses to the disappearance that prior art exists, its main objective provides a compact automatic locking device that falls of single linking gear separation and reunion, and its structure sets up rationally, can reduce the size of automatic locking device that falls when guaranteeing the moment of torsion, makes it can install in the frame of window, is favorable to improving the aesthetic property of window.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an automatic locking device that falls of compact of single linking gear separation and reunion which characterized in that: comprises a shell, a handle motor, a speed reduction gear set, a clutch mechanism, a connecting gear piece, a rotating piece and a connecting piece;

the handle comprises a shell, a handle motor, a transmission part, a first mounting cavity, a second mounting cavity and a locking mechanism, wherein the shell consists of a bottom shell and an upper cover, the first mounting cavity for mounting the handle motor and the second mounting cavity for mounting the transmission part are arranged in the shell, and an opening is formed in the left side of the second mounting cavity; the bottom shell is provided with a first cylinder body for mounting the speed reduction gear set and the clutch mechanism and a second cylinder body for mounting the engaging gear piece, and the bottom shell and the upper cover are both provided with concave positions for mounting the rotating piece; the end parts of the first column body and the second column body extend to the upper cover, and the concave position is provided with a through hole;

the connecting piece comprises a moving rod and a moving rack, the moving rod is movably arranged at the opening, and the moving rack is connected with the rotating piece; the end part of the moving rod is provided with a connecting hole for connecting with the lock rod and a limiting part for limiting the moving distance of the moving rod; the left side of the end part of the bottom shell is provided with an installation part for installing a device, the outward surface of the installation part is a limiting surface, and the limiting part can be selectively limited on the limiting surface;

the handle motor is arranged in the first installation cavity, and the output end of the handle motor extends into the second installation cavity; the clutch mechanism, the connecting tooth plates and the rotating piece are sequentially arranged on the right side of the second mounting cavity in a straight line in the extending direction of the output end of the handle motor, and the connecting piece is movably arranged in the opening and connected with the rotating piece; the speed reduction tooth group is assembled at the upper end of the second mounting cavity, a plurality of speed reduction tooth sheets of the speed reduction tooth group are arranged in a triangular shape, and the speed reduction tooth group is connected between the handle motor and the clutch mechanism;

the clutch mechanism comprises a central tooth piece, a swinging piece and a connecting tooth piece, wherein the central tooth piece comprises a lower tooth piece and an upper tooth piece which are integrally connected and fixed and are coaxial with a central shaft; the swinging piece can be arranged between the lower tooth piece and the upper tooth piece in a swinging mode; the swinging piece comprises a lower swinging piece and an upper swinging piece, a space is formed by the lower swinging piece and the upper swinging piece, and the upper tooth piece and the connecting tooth piece are positioned in the space; one end of the lower swinging part is provided with a rotating hole in a penetrating manner, a rotating column is arranged between the lower gear and the upper gear, and the lower swinging part is assembled on the rotating column through the rotating hole and swings around the center of the rotating column; the first column body for mounting the clutch mechanism comprises a first round pin joint section and a second round pin joint section, wherein the first round pin joint section is connected to the upper side of the first round pin joint section; the first round pin joint section penetrates through the lower gear piece, the rotary column and the upper gear piece, the diameter of the second round pin joint section is smaller than that of the first round pin joint section, the top end of the first round pin joint section is formed on a first step surface arranged around the second round pin joint section, and one end of the upper swing piece is pin jointed with the second round pin joint section and limited on the first step surface; the other end of the lower swinging part is convexly provided with a mounting column upwards; the mounting column is provided with a third circular pin joint section and a fourth circular pin joint section connected to the upper side of the third circular pin joint section, the diameter of the fourth circular pin joint section is smaller than that of the third circular pin joint section, and the top end of the third circular pin joint section is formed on a second step surface arranged around the fourth circular pin joint section; the third circular pivoting section is sleeved with a pressure spring, the connecting tooth piece is arranged on the third circular pivoting section, and the upper end and the lower end of the pressure spring are respectively limited to the lower side of the connecting tooth piece and the upper side of the lower swinging piece; the other end of the upper swinging part is fixedly connected with the fourth round pin joint section and limited by the second step surface;

the central tooth piece drives the connecting tooth piece to rotate and simultaneously drives the swinging piece to swing so that the connecting tooth piece and the connecting tooth piece form clutch connection; the upper cover is provided with a limiting convex rib, when the swinging piece swings around the rotating column, the connecting tooth piece is meshed with the connecting tooth piece, and the mounting column is abutted against the limiting convex rib to prevent over-swinging.

As a preferred embodiment: the inward surface of the mounting part is a positioning surface, and the upper cover is limited by the positioning surface after being mounted on the bottom shell.

As a preferred embodiment: the movable rod is provided with a movable convex strip, and the bottom shell and the upper cover are provided with movable grooves at the opening; the moving convex strip is limited in the moving groove.

As a preferred embodiment: when the engaging tooth piece is meshed with the engaging tooth piece, the engaging tooth piece is positioned on the lower side of the transverse plane where the rotating column is positioned; when the engaging tooth piece is separated from the engaging tooth piece, the engaging tooth piece is positioned on the upper side of the transverse plane where the rotating column is positioned.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme: the first mounting cavity for mounting the handle motor and the second mounting cavity for mounting the transmission part are arranged on the shell, so that the parts are effectively distinguished; the clutch mechanism, the connecting tooth plates and the rotating piece are sequentially arranged on the right side of the second mounting cavity in a straight line in the extending direction of the output end of the handle motor, the connecting piece can be movably arranged on an opening in the left side of the second mounting cavity and is connected with the rotating piece, and the plurality of speed reducing tooth plates of the speed reducing tooth group are arranged at the upper end of the second mounting cavity in a triangular structure and are connected between the handle motor and the clutch mechanism; therefore, the speed reduction tooth groups are arranged in a triangular structure, so that the whole automatic lock falling device is more compact in structure; the size of the automatic locking device can be greatly reduced by using the reasonable layout while the torque is ensured, so that the automatic locking device can be assembled in a frame body of a window, and the attractiveness of the window is improved;

the center piece, the swinging piece and the connecting tooth piece form the core of the whole clutch mechanism, and the pressure spring, the connecting tooth piece and the upper swinging piece are simpler and more convenient to install and position through the structural design of the fixed shaft and the lower swinging piece, so that the production, manufacturing and assembling processes are simplified; the rotating end of the swinging piece can be rotatably matched with the central piece in a rotating mode, the connecting tooth piece is assembled at the swinging end of the swinging piece, and the central tooth piece drives the connecting tooth piece to rotate and simultaneously drives the swinging piece to swing so that the connecting tooth piece and the connecting tooth piece form clutch connection; the clutch has simple structure, easy realization of the clutch process and reliable operation; therefore, the locking device is very beneficial to popularization and application; meanwhile, the pressure spring increases the rotation resistance of the connecting gear, correspondingly, the meshing transmission resistance of the upper gear piece and the connecting gear is increased, the pivot between the upper swing piece and the fixed shaft is smooth, the resistance is small, the swing smoothness of the swing piece is improved from multiple aspects, and therefore the clutch control accuracy and rapidity are improved.

To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a front view of the preferred embodiment of the present invention.

Fig. 2 is a schematic view of the structure of fig. 1 for opening the upper cover.

Fig. 3 is a right side view of the clutch mechanism according to the preferred embodiment of the present invention.

Fig. 4 is a partially exploded view of fig. 3.

The attached drawings indicate the following:

10. casing 101, first installation cavity

102. Second mounting cavity 1021, opening

1022. Movable groove 11 and bottom shell

111. First cylinder 1111 and first round pin joint section

1112. Second round pin joint section 1113 and first step surface

112. Second post 113, concave

114. Mounting portion 1141, limiting surface

1142. Positioning surface 12, upper cover

121. Limiting convex rib 20 and handle motor

21. Output end 30, reduction gear set

40. Clutch mechanism 41, center

411. Lower gear 412, upper gear

413. Rotating column 42, swinging member

421. Lower swinging piece 4211 and rotating hole

422. Upper ornament 423 and space

424. Mounting column 4241 and third circular pivoting section

4242. Fourth round pin joint section 4243 and second step surface

425. Pressure spring 50, connecting tooth sheet

60. Rotating member 70 and joint member

71. Moving rod 711 and connecting hole

712. Stopper 713 and moving protrusion

72. The rack is moved.

Detailed Description

Referring to fig. 1 to 4, a structure of a preferred embodiment of the present invention is shown, which is a compact automatic lock-down device with single engagement gear engaging and disengaging, comprising a housing 10, a handle motor 20, a reduction gear set 30, an engaging mechanism 40, an engaging tooth 50, a rotating member 60 and an engaging member 70.

The shell 10 comprises a bottom shell 11 and an upper cover 12, a first mounting cavity 101 for mounting the handle motor 20 and a second mounting cavity 102 for mounting a transmission part are arranged in the shell 10, and the left side of the second mounting cavity 102 is provided with an opening 1021; the handle motor 20 is mounted in the first mounting cavity 101, and the output end 21 of the handle motor 20 extends into the second mounting cavity 102; the clutch mechanism 40, the connecting tooth plates 50 and the rotating piece 60 are sequentially arranged on the right side of the second mounting cavity 102 in a straight line in the extending direction of the output end 21 of the handle motor, and the connecting piece 70 can be movably arranged at the opening 1021 and is connected with the rotating piece 60; the reduction tooth group 30 is assembled at the upper end of the second mounting cavity 102, a plurality of reduction teeth of the reduction tooth group 30 are arranged in a triangular shape, and the reduction tooth group 30 is connected between the handle motor 20 and the clutch mechanism 40.

Through a first installation cavity 101 for installing the handle motor 20 and a second installation cavity 102 for installing the transmission part which are arranged on the shell 10, the parts are effectively distinguished; the clutch mechanism 40, the connecting tooth plates 50 and the rotating piece 60 are sequentially arranged on the right side of the second mounting cavity 102 in a straight line in the extending direction of the output end 21 of the handle motor 20, the connecting piece 70 is movably arranged on a left opening 1021 of the second mounting cavity 102 and is connected with the rotating piece 60, and the plurality of speed reducing tooth plates of the speed reducing tooth group 30 are arranged at the upper end of the second mounting cavity 102 in a triangular structure and are connected between the handle motor 20 and the clutch mechanism 40; therefore, the speed reduction tooth group 30 is arranged in a triangular structure, so that the structure of the whole automatic lock falling device is more compact; the size of the automatic locking device can be greatly reduced by means of the reasonable layout while the torque is guaranteed, so that the automatic locking device can be assembled in a frame body of a window, and the attractiveness of the window is improved.

In more detail, the bottom shell 11 is provided with a first column 111 for mounting the reduction gear set 30 and the clutch mechanism 40, and a second column 112 for mounting the engaging gear 50, and the bottom shell 11 and the upper cover 12 are each provided with a recess 113 for mounting the rotary member 60. The ends of the first column 111 and the second column 112 extend to the upper cover 12, and the recess 113 has a through hole 1131; the through hole 1131 exposes a square hole of the rotary member 60 for mounting a handle to perform a manual lock-off function. Through the arrangement of the first cylinder 111, the second cylinder 112 and the concave position 113, the installation of each transmission part is more convenient and simpler.

Next, the specific structure of the clutch mechanism 40 is described in detail. The clutch mechanism 40 comprises a central gear 41, an oscillating member 42 and an engaging gear 43, wherein the central gear 41 comprises a lower gear 411 and an upper gear 412 which are integrally connected and fixed and are concentric with the central axis; the swinging piece 42 can be arranged between the lower gear 411 and the upper gear 412 in a swinging mode; the swinging member 42 comprises a lower swinging member 421 and an upper swinging member 422, a space 423 is formed by the distance device between the lower swinging member 421 and the upper swinging member 422, and the upper tooth member 412 and the engaging tooth member 43 are positioned in the space 423; one end of the lower swing member 421 penetrates through a rotation hole 4211, a rotation column 413 is arranged between the lower gear 411 and the upper gear 412, and the lower swing member 421 is assembled on the rotation column 413 through the rotation hole 4211 and swings around the center of the rotation column 413.

The first cylinder 111 for mounting the clutch mechanism 40 includes a first circular pivot section 1111 connected to a second circular pivot section 1112 on the upper side of the first circular pivot section 1111; the first circular pivoting section 1111 passes through the lower tooth 411, the rotating column 413 and the upper tooth 412, the diameter of the second circular pivoting section 1112 is smaller than that of the first circular pivoting section 1111, the top end of the first circular pivoting section 1111 is formed on a first step surface 1113 arranged around the second circular pivoting section 1112, and one end of the upper swing part 422 is pivoted on the second circular pivoting section 1112 and limited on the first step surface 1113.

The other end of the lower swinging part 421 is provided with a mounting column 424 in an upward protruding manner; the mounting column 424 is provided with a third circular pin joint section 4241 and a fourth circular pin joint section 4242 connected to the upper side of the third circular pin joint section 4241, the diameter of the fourth circular pin joint section 4242 is smaller than that of the third circular pin joint section 4241, and the top end of the third circular pin joint section 4241 is formed on a second step surface 4243 arranged around the fourth circular pin joint section 4242; the third circular pivoting section 4241 is sleeved with a pressure spring 425, the engaging tooth 43 is mounted on the third circular pivoting section 4241, and the upper end and the lower end of the pressure spring 425 are respectively limited by the lower side of the engaging tooth 43 and the upper side of the lower swinging piece 421; the other end of the upper swing portion 422 is fixedly connected to the fourth circular pivot joint 4242 and is limited by a second step surface 4243.

And the upper cover 12 is provided with a limit rib 121, when the swinging piece 42 swings around the rotating column 413 to enable the engaging tooth piece 43 to be meshed with the engaging tooth piece 50, the mounting column 424 abuts against the limit rib 121 to prevent over swinging, and the running reliability of the clutch mechanism 40 is ensured. Specifically, when the engaging teeth 43 are brought into engagement with the engaging teeth 50, the engaging teeth 43 are located on the lower side of the transverse plane on which the rotary cylinder 413 is located; when the engaging teeth 43 are separated from the engaging teeth 50, the engaging teeth 43 are located on the upper side of the transverse plane on which the rotating cylinder 413 is located. Therefore, enough electric control time can be ensured when the engaging gear 43 is switched between an on state and an off state, the requirement on electric control precision is not high, and the product feasibility is good.

Therefore, the clutch has the advantages of simple structure, easy realization of the clutch process and reliable operation; therefore, the locking device is very beneficial to popularization and application. And, through the clutching mechanism 40 who sets up, when needs manual lock that falls, only need utilize the handle of connecting in rotating member 60 just can manually rotate the rotating member and remove with transmission link piece 70 and accomplish manual lock that falls, and this process can not drive handle motor 20 and rotate, can protect handle motor 20 on the one hand, prolongs handle motor 20's life, and on the other hand can make manual lock that falls lighter.

The connecting member 70 includes a moving rod 71 and a moving rack 72, the moving rod 71 is movably disposed at the opening 1021, and the moving rack 72 is connected to the rotating member 60. Specifically, the end of the moving rod 71 is provided with a connecting hole 711 for connecting with a lock rod and a limiting part 712 for limiting the moving distance of the moving rod 71, but the connecting hole 711 may be replaced by a boss, and may be connected with the lock rod. The left side of the end of the bottom case 11 is provided with an installation part 114 for installing a device, the outward surface of the installation part 114 is a limiting surface 1141, and the limiting part 712 can be selectively limited on the limiting surface 1141; the limiting part 712 and the limiting surface 1141 are used for limiting, overtravel movement of the movable rack 72 can be prevented, and the use reliability of the lock dropping device is improved. The inward surface of the mounting portion 114 is a positioning surface 1142, and after the upper cover 12 is mounted on the bottom case 11, the upper cover 12 is limited by the positioning surface 1142; the positioning surface 1142 can facilitate the process of mounting the upper cover 12 on the bottom case 11.

The moving rod 71 is provided with a moving convex bar 713, and the bottom shell 11 and the upper cover 12 are provided with a moving groove 1022 at the opening 1021; the movement ribs 713 are confined in the movement grooves 1022; this arrangement ensures the movement reliability of the movable rod 71.

The utility model discloses a design focus lies in: the first mounting cavity for mounting the handle motor and the second mounting cavity for mounting the transmission part are arranged on the shell, so that the parts are effectively distinguished; the clutch mechanism, the connecting tooth plates and the rotating piece are sequentially arranged on the right side of the second mounting cavity in a straight line in the extending direction of the output end of the handle motor, the connecting piece can be movably arranged on an opening in the left side of the second mounting cavity and is connected with the rotating piece, and the plurality of speed reducing tooth plates of the speed reducing tooth group are arranged at the upper end of the second mounting cavity in a triangular structure and are connected between the handle motor and the clutch mechanism; therefore, the speed reduction tooth groups are arranged in a triangular structure, so that the whole automatic lock falling device is more compact in structure; the size of the automatic locking device can be greatly reduced by using the reasonable layout while the torque is ensured, so that the automatic locking device can be assembled in a frame body of a window, and the attractiveness of the window is improved;

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides an automatic locking device that falls of compact of single linking gear separation and reunion which characterized in that: comprises a shell (10), a handle motor (20), a speed reduction gear group (30), a clutch mechanism (40), a connecting gear piece (50), a rotating piece (60) and a connecting piece (70);

the shell (10) comprises a bottom shell (11) and an upper cover (12) which are assembled with each other, a first mounting cavity (101) for mounting a handle motor (20) and a second mounting cavity (102) for mounting a transmission part are formed in the shell (10), and an opening (1021) is formed in the left side of the second mounting cavity (102); the bottom shell (11) is provided with a first cylinder (111) for mounting the speed reduction gear set (30) and the clutch mechanism (40) and a second cylinder (112) for mounting the engaging gear piece (50), and the bottom shell (11) and the upper cover (12) are both provided with concave positions (113) for mounting the rotating piece (60); the ends of the first cylinder (111) and the second cylinder (112) extend to the upper cover (12), and the concave part (113) is provided with a through hole (1131);

the connecting piece (70) comprises a moving rod (71) and a moving rack (72), the moving rod (71) is movably arranged in the opening (1021), and the moving rack (72) is connected with the rotating piece (60); the end part of the moving rod (71) is provided with a connecting hole (711) used for being connected with the lock rod and a limiting part (712) used for limiting the moving distance of the moving rod (71); an installation part (114) for installing a device is arranged on the left side of the end part of the bottom shell (11), the outward surface of the installation part (114) is a limiting surface (1141), and the limiting part (712) can be selectively limited on the limiting surface (1141);

the handle motor (20) is mounted in the first mounting cavity (101), and an output end (21) of the handle motor (20) extends into the second mounting cavity (102); the clutch mechanism (40), the connecting tooth plates (50) and the rotating piece (60) are sequentially arranged on the right side of the second mounting cavity (102) in a straight line in the extending direction of the output end (21) of the handle motor, and the connecting piece (70) is movably arranged in the opening (1021) and is connected with the rotating piece (60); the speed reduction gear set (30) is assembled at the upper end of the second mounting cavity (102), a plurality of speed reduction gear sheets of the speed reduction gear set (30) are arranged in a triangular mode, and the speed reduction gear set (30) is connected between the handle motor (20) and the clutch mechanism (40);

the clutch mechanism (40) comprises a central gear (41), a swinging member (42) and a connecting gear (43), wherein the central gear (41) comprises a lower gear (411) and an upper gear (412) which are integrally connected and fixed and are concentric with a central shaft; the swinging piece (42) can be arranged between the lower tooth piece (411) and the upper tooth piece (412) in a swinging mode; the swinging piece (42) comprises a lower swinging piece (421) and an upper swinging piece (422), a space (423) is formed by the distance device of the lower swinging piece (421) and the upper swinging piece (422), and the upper tooth piece (412) and the engaging tooth piece (43) are positioned in the space (423); one end of the lower swinging part (421) is provided with a rotating hole (4211) in a penetrating manner, a rotating column (413) is arranged between the lower gear (411) and the upper gear (412), and the lower swinging part (421) is assembled on the rotating column (413) through the rotating hole (4211) and swings around the center of the rotating column (413); the first cylinder (111) used for mounting the clutch mechanism (40) comprises a first circular pivoting section (1111) and a second circular pivoting section (1112) connected to the upper side of the first circular pivoting section (1111); the first circular pivoting section (1111) penetrates through the lower tooth piece (411), the rotating column (413) and the upper tooth piece (412), the diameter of the second circular pivoting section (1112) is smaller than that of the first circular pivoting section (1111), the top end of the first circular pivoting section (1111) is formed on a first step surface (1113) arranged around the second circular pivoting section (1112), and one end of the upper swinging piece (422) is pivoted on the second circular pivoting section (1112) and limited on the first step surface (1113); the other end of the lower swinging part (421) is provided with a mounting column (424) in an upward protruding manner; the mounting column (424) is provided with a third circular pivoting section (4241) and a fourth circular pivoting section (4242) connected to the upper side of the third circular pivoting section (4241), the diameter of the fourth circular pivoting section (4242) is smaller than that of the third circular pivoting section (4241), and the top end of the third circular pivoting section (4241) is formed on a second step surface (4243) arranged around the fourth circular pivoting section (4242); the third circular pivoting section (4241) is sleeved with a pressure spring (425), the connecting tooth piece (43) is installed on the third circular pivoting section (4241), and the upper end and the lower end of the pressure spring (425) are limited to the lower side of the connecting tooth piece (43) and the upper side of the lower swinging piece (421) respectively; the other end of the upper swing piece (422) is fixedly connected to a fourth circular pin joint section (4242) and limited by a second step surface (4243);

the central gear piece (41) drives the engaging gear piece (43) to rotate and simultaneously drives the swinging piece (42) to swing so that the engaging gear piece (43) and the engaging gear piece (50) form clutch connection; the upper cover (12) is provided with a limiting convex rib (121), when the swinging piece (42) swings around the rotating column (413) to enable the connecting tooth piece (43) to be meshed with the connecting tooth piece (50), the mounting column (424) abuts against the limiting convex rib (121) to prevent over swinging.

2. The compact automatic single engagement gear clutching drop lock device of claim 1, wherein: the inward surface of the mounting part (114) is a positioning surface (1142), and after the upper cover (12) is mounted on the bottom shell (11), the upper cover (12) is limited by the positioning surface (1142).

3. The compact automatic single engagement gear clutching drop lock device of claim 1, wherein: the moving rod (71) is provided with a moving convex strip (713), and the bottom shell (11) and the upper cover (12) are provided with a moving groove (1022) at the opening (1021); the movement rib (713) is confined in the movement groove (1022).

4. The compact automatic single engagement gear clutching drop lock device of claim 1, wherein: when the engaging tooth (43) is engaged with the engaging tooth (50), the engaging tooth (43) is located on the lower side of the transverse plane of the rotating column (413); when the engaging teeth (43) are separated from the engaging teeth (50), the engaging teeth (43) are located on the upper side of the transverse plane on which the rotating cylinder (413) is located.