Gear shift switching device

Abstract

The application provides a gear shift switching device, which comprises a planet carrier, a sun gear, a planet gear and a fixed ring gear; the planet carrier has a driving end and a rotating end arranged oppositely; the sun gear has an axis extending along a first direction, the sun gear is rotatably installed to the driving end along the axis, and the side tooth surface of the sun gear is sequentially formed with a revolution part and a fixed rotation part along the first direction; the planet gear has an axis extending along the first direction, the planet gear is rotatably and movably installed to the rotating end along the axis and the first direction, and is in mesh with the sun gear, the planet gear has a movement stroke along the first direction to the revolution part or the fixed rotation part; the fixed ring gear is arranged corresponding to the revolution part, the planet gear is in mesh with the fixed ring gear when moving to the revolution part, and is out of mesh with the fixed ring gear when moving to the fixed rotation part.

Description

Technical Field

[0001] This invention relates to the field of antenna equipment technology, and in particular to a gear shifting device. Background Technology

[0002] A base station, also known as a public mobile communication base station, is an interface device for mobile devices to access the Internet. It is also a type of radio station, referring to a radio transceiver station that transmits and receives signals between a mobile communication switching center and a mobile phone terminal within a certain radio coverage area. Both the base station and the terminal transmit and receive signals through an antenna.

[0003] With the increasing number of mobile terminals, the demand for mobile communication base station antennas is also growing. However, due to resource constraints of mobile base stations, integrating multiple antennas has become an increasingly popular trend. For multi-band antennas, the current electric adjustment method uses a separate downtilt adjustment device for each frequency band, meaning a multi-band antenna requires multiple downtilt adjustment devices controlled by multiple motors. However, adjusting multiple devices separately results in an excessively large base station size and high cost. Summary of the Invention

[0004] This invention provides a shifting device to solve the problem of excessively large base station switching devices and to achieve miniaturization of the switching device.

[0005] This invention provides a gear shifting device, comprising:

[0006] A planetary support has a drive end and a rotating end that are arranged opposite to each other;

[0007] A central gear has an axis extending along a first direction. The central gear is rotatably mounted to the drive end along its axis. The side tooth surface of the central gear is sequentially formed with a rotating portion and a stationary portion along the first direction.

[0008] A planetary gear has an axis extending along the first direction, the planetary gear rotatably along its axis and movably mounted to the rotating end along the first direction, and meshes with the central gear, the planetary gear having a travel distance along the first direction to the rotating portion or the stationary portion; and

[0009] A fixed gear ring is provided corresponding to the rotating part. The planetary gear moves to the point where the rotating part meshes with the fixed gear ring, and moves to the point where the stationary rotating part disengages from the fixed gear ring.

[0010] According to the gear shifting device provided by the present invention, the planetary support includes a clamping base plate and a clamping cover plate spaced apart along the first direction, and the central gear is located between the clamping base plate and the clamping cover plate;

[0011] The gear shifting device further includes:

[0012] A rotating shaft extends along the first direction and is disposed between the clamping base plate and the clamping cover plate. The rotating shaft rotates along its axis and is movably mounted to the rotating end along the first direction. The planetary gear is fixedly mounted on the rotating shaft.

[0013] A lifting structure is used to drive the rotating shaft to move along the first direction.

[0014] According to the gear shifting device provided by the present invention, a first through hole is provided on the clamping base plate corresponding to the rotating shaft;

[0015] The lifting structure includes:

[0016] An elastic element is disposed between the opposite end faces of the planetary gear and the clamping cover plate to drive the rotating shaft to move on the clamping base plate;

[0017] A lifting rod is disposed on the side of the planetary support adjacent to the clamping base plate and corresponding to the first through hole. The lifting rod is movably disposed along the first direction to abut against the rotating shaft from the first through hole, driving the rotating shaft to move towards the clamping cover plate; and,

[0018] The drive device drives the lifting rod to move.

[0019] According to the gear shifting device provided by the present invention, the driving device includes:

[0020] A lead screw is provided to extend along the first direction;

[0021] A lead screw slider, threaded onto the drive lead screw, and a lifting rod mounted on the lead screw slider; and...

[0022] A drive assembly drives the drive screw to rotate, thereby driving the screw slider to move along the first direction.

[0023] According to the gear shifting device provided by the present invention, the drive component includes:

[0024] A transmission gear has a transmission axis extending along the first direction, a rotating gear is rotatably disposed along the transmission axis, and a drive screw is fixedly mounted on the transmission gear.

[0025] The drive gear meshes with the transmission gear; and,

[0026] The first drive motor drives the drive gear to rotate, thereby driving the transmission gear to rotate.

[0027] According to the gear shifting device provided by the present invention, a second through hole is provided on the clamping cover plate corresponding to the rotating shaft;

[0028] The gear shifting device also includes an adjusting gear column, on the outer side of which multiple transmission teeth are formed. The adjusting gear column is movably inserted into the second through hole and is fixedly connected to the rotating shaft.

[0029] The rotating shaft drives the adjusting gear column to rotate and move along the first direction.

[0030] According to the gear shifting device provided by the present invention, the gear shifting device further includes:

[0031] A mounting plate is installed on the side of the planetary support adjacent to the clamping cover plate. The mounting plate has multiple mounting holes spaced apart, corresponding to the rotation path of the planetary gears.

[0032] The support column is provided with multiple mounting holes, and the multiple support columns are rotatably installed into the multiple mounting holes. The end face of the support column facing the planetary support is recessed with an adjustment groove, and the inner sidewall of the adjustment groove is formed with a mating tooth, which is used to cooperate with the transmission tooth for rotation.

[0033] The adjusting toothed column has a travel distance that moves along the first direction into the adjusting groove to drive the bearing column to rotate.

[0034] According to the gear shifting device provided by the present invention, the gear shifting device further includes an anti-rotation structure, which is used to restrict the rotation of the bearing column.

[0035] According to the shifting device provided by the present invention, one end of the bearing column facing the planetary support is exposed outside the mounting plate, and a plurality of anti-rotation teeth are provided on the side wall surface of the end of the bearing column exposed outside the mounting plate.

[0036] The anti-rotation structure includes:

[0037] An anti-rotation member is mounted on the mounting plate and positioned between the plurality of bearing columns. The anti-rotation member has a plurality of elastic arms corresponding to the bearing columns, and the free end of each elastic arm extends toward the bearing column into the anti-rotation retaining teeth.

[0038] A pressing protrusion is installed on the end face of the clamping cover plate facing the mounting plate to push the elastic arm toward the mounting plate, so that the elastic arm disengages from the anti-rotation tooth.

[0039] According to the gear shifting device provided by the present invention, the gear shifting device further includes a second drive motor, which drives the central gear to rotate.

[0040] In the gear shifting device provided by this invention, when gear shifting is required, the planetary gear moves to the rotating part. At this time, the planetary gear, the planetary support, and the fixed gear ring together form a rotating gear system, driving the central gear to rotate. The planetary gear rotates around the central gear, moving to the required position. Then, the planetary gear is controlled to switch to the fixed rotating part, allowing it to contact the external control structure. At this time, the central gear continues to rotate, and the planetary gear rotates in place to transmit the power of the central gear to the antenna adjustment control device. Through the cooperation of the central gear and the planetary gear, the antenna gear shifting device can simultaneously complete the position selection and positioning adjustment by simply switching the position of the planetary gear, reducing costs and creating a compact structure without the need for excessive adjustment devices for multiple antennas. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 A three-dimensional exploded view of an embodiment of the gear shifting device provided by the present invention;

[0043] Figure 2 for Figure 1 A three-dimensional structural schematic diagram of an embodiment of the fixed gear ring;

[0044] Figure 3 for Figure 1 A three-dimensional structural schematic diagram of one embodiment of a planetary support;

[0045] Figure 4 for Figure 1 A three-dimensional structural schematic diagram of an embodiment of a planetary gear;

[0046] Figure 5 A three-dimensional structural schematic diagram of an embodiment of the gear shifting device provided by the present invention, including a lifting structure;

[0047] Figure 6 for Figure 5 A three-dimensional structural diagram of the central lifting structure in operation;

[0048] Figure 7 for Figure 5 A three-dimensional structural schematic diagram of an embodiment of the central lifting structure;

[0049] Figure 8 for Figure 5 A three-dimensional structural schematic diagram of an embodiment of a lead screw slider;

[0050] Figure 9 An exploded three-dimensional structural diagram of another embodiment of the gear shifting device provided by the present invention;

[0051] Figure 10 for Figure 9 A bottom view of the mounting plate structure;

[0052] Figure 11 for Figure 9 A three-dimensional structural diagram of the central load-bearing column;

[0053] Figure 12 for Figure 9 A three-dimensional structural diagram of the component that aborts the transfer;

[0054] Figure 13 This is a three-dimensional exploded structural diagram of a specific embodiment of the gear shifting device provided by the present invention.

[0055] Figure label:

[0056] 100. Gear shifting device; 1. Planetary support; 11. Clamping base plate; 111. First through hole; 12. Clamping cover plate; 121. Second through hole; 13. Mating protrusion; 2. Central gear; 3. Planetary gear; 4. Fixed gear ring; 41. Gear ring base plate; 42. Positioning protrusion; 5. Rotating shaft; 61. Elastic element; 62. Lifting rod; 631. Drive screw; 632. Screw slider; 6331. Transmission gear; 6332. Drive gear; 6333. First drive motor; 7. Adjusting gear column; 8. Mounting plate; 9. Bearing column; 91. Anti-rotation clip; 101. Anti-rotation element; 102. Top pressing protrusion; 110. Second drive motor. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0058] Please see Figure 1This invention provides a gear shifting device 100, including a planetary support 1, a central gear 2, planetary gears 3, and a fixed gear ring 4. The planetary support 1 has a driving end and a rotating end arranged opposite to each other. The central gear 2 has an axis extending along a first direction, and the central gear 2 is rotatably mounted to the driving end along its axis. The side tooth surface of the central gear 2 is sequentially formed with a rotating portion and a stationary portion along the first direction. The planetary gear 3 has an axis extending along the first direction, and the planetary gear 3 is rotatable along its axis and movably mounted to the rotating end along the first direction, and meshes with the central gear 2. The planetary gear 3 has a travel distance along the first direction to the rotating portion or the stationary portion. The fixed gear ring 4 is arranged corresponding to the rotating portion. The planetary gear 3 moves to the rotating portion and meshes with the fixed gear ring 4, and moves to the stationary portion and disengages from the fixed gear ring 4.

[0059] In the gear shifting device 100 provided by the present invention, when gear shifting is required, the planetary gear 3 is moved to the rotating part. At this time, the planetary gear 3, the planetary support 1, and the fixed gear ring 4 together form a rotating gear system, driving the central gear 2 to rotate. The planetary gear 3 rotates around the central gear 2, moving the planetary gear 3 to the required position. Then, the planetary gear 3 is controlled to switch to the fixed rotating part, so that the planetary gear 3 can contact the external control structure. At this time, the central gear 2 continues to rotate, and the planetary gear 3 rotates in place to transmit the power of the central gear 2 to the antenna adjustment control device. Through the cooperation of the central gear 2 and the planetary gear 3, the antenna gear shifting device can complete the position selection and positioning adjustment simultaneously by only switching the position of the planetary gear 3, reducing costs and making the structure compact, without the need to set too many adjustment devices for multiple antennas.

[0060] In this embodiment, please refer to Figure 2 To facilitate the installation of the central gear, the gear shifting device 100 further includes a gear ring base plate 41. The fixed gear ring 4 is fixedly installed on the gear ring base plate 41, and the drive end is rotatably installed at the center position of the gear ring base plate 41. This facilitates the engagement between the central gear 2 and the fixed gear ring 4, and avoids deviations during installation.

[0061] For further details, please refer to Figures 3 to 4The planetary support 1 includes a clamping base plate 11 and a clamping cover plate 12 spaced apart along the first direction. The central gear 2 is located between the clamping base plate 11 and the clamping cover plate 12. The gear shifting device 100 also includes a rotating shaft 5 and a lifting structure. The rotating shaft 5 extends along the first direction and is located between the clamping base plate 11 and the clamping cover plate 12. The rotating shaft 5 rotates along its axis and is movably mounted to the rotating end along the first direction. The planetary gear 3 is fixedly mounted on the rotating shaft 5. The lifting structure is used to drive the rotating shaft 5 to move along the first direction. In this embodiment, the central gear 2 is mounted between the clamping base plate 11 and the clamping cover plate 12. To facilitate the movement of the planetary gear 3 along the first direction, the planetary gear 3 is fixedly mounted on the rotating shaft 5. The movement of the planetary gear 3 is controlled by the movement of the rotating shaft 5 along the first direction, ensuring the stability of the movement of the planetary gear 3.

[0062] It should be noted that, in order to facilitate the positioning of the planetary support 1, a positioning protrusion 42 is provided on the gear ring base plate 41, and a mating protrusion 13 is provided on the clamping base plate 11 corresponding to the positioning protrusion. The mating protrusion 13 abuts against the side wall surface of the positioning protrusion 42 for positioning.

[0063] It should be noted that the lifting structure can be implemented in various ways. For example, a drive cylinder can be provided on the clamping base plate, and the rotating shaft 5 can be controlled to move along the first direction by the drive cylinder.

[0064] For further details, please refer to Figures 5 to 6 The clamping base plate 11 has a first through hole 111 corresponding to the rotating shaft 5; the lifting structure includes an elastic element 61, a lifting rod 62, and a driving device; the elastic element 61 is disposed between the opposite end faces of the planetary gear 3 and the clamping cover plate 12, and is used to drive the rotating shaft 5 to move toward the clamping base plate 11; the lifting rod 62 is disposed on the side of the planetary support 1 adjacent to the clamping base plate 11, and is disposed corresponding to the first through hole 111. The lifting rod 62 is movably disposed along the first direction so as to abut against the rotating shaft 5 from the first through hole 111, and drive the rotating shaft 5 to move toward the clamping cover plate 12; the driving device drives the lifting rod 62 to move. In this embodiment, the rotating shaft 5 is controlled to move in different directions by the elastic element 61 and the lifting rod 62 respectively. The structure is simple and can ensure that when the rotating shaft 5 is not under force, it automatically drives the planetary gear 3 to fall into the rotating part. When adjustment is required, the planetary gear 3 is lifted into the fixed rotation part to perform fixed rotation adjustment at the required position.

[0065] It should be noted that the elastic element can be set in various ways, such as as a spring, which is sleeved on the rotating shaft 5 to drive the rotating shaft 5 to move toward the clamping base plate 11.

[0066] In addition, in this embodiment, multiple lifting rods 62 are provided, and the multiple lifting rods 62 are spaced apart along the rotation path of the planetary gear 3 so that the rotating shaft 5 can be driven to move when the planetary gear 3 is in different positions.

[0067] Similarly, there are multiple ways to drive the lifting rod 62, such as by controlling it with a cylinder.

[0068] For details, please refer to Figure 7 The driving device includes a drive screw 631, a screw slider 632, and a driving assembly. The drive screw 631 extends along the first direction. The screw slider 632 is threaded onto the drive screw 631, and the lifting rod 62 is mounted on the screw slider 632. The driving assembly drives the drive screw 631 to rotate, thereby driving the screw slider 632 to move along the first direction. In this embodiment, the rotation of the drive screw 631 controls the linear movement of the screw slider 632. The movement is simple, stable, and controllable, with a compact structure. It also facilitates the simultaneous movement of multiple lifting rods 62, avoiding the need for multiple driving components, reducing installation costs, and compressing the space occupied.

[0069] It should be noted that you should refer to [link / reference]. Figure 8 In this embodiment, multiple lifting rods 62 are provided, and all of the multiple lifting rods 62 are fixedly installed on the lead screw slider 632, so as to control the movement of multiple lifting rods 62 simultaneously.

[0070] It should be noted that the drive assembly can be configured in various ways, such as by directly connecting the drive screw 631 to the motor and driving the drive screw 631 to rotate through the motor.

[0071] In this embodiment, the drive assembly includes a transmission gear 6331, a drive gear 6332, and a first drive motor 6333. The transmission gear 6331 has a transmission axis extending along the first direction, the rotating gear 6331 is rotatably arranged along the transmission axis, and the drive screw 631 is fixedly mounted on the transmission gear 6331. The drive gear 6332 meshes with the transmission gear 6331. The first drive motor 6333 drives the drive gear 6332 to rotate, thereby driving the transmission gear 6331 to rotate. In this embodiment, the rotation of the first drive motor 6333 is transmitted to the drive screw 631 through gear connection, which facilitates the installation of the drive assembly and avoids insufficient internal installation space caused by all components extending sequentially along the first direction.

[0072] On the other hand, there are several ways to adjust the external antenna structure using the planetary gear 3. For example, the planetary gear 3 can be directly connected to the external antenna structure, and the rotation of the planetary gear 3 can drive the external antenna structure to rotate, thereby making adjustments. Alternatively, the planetary gear 3 can be equipped with an adjusting lifting rod, and the position of the external antenna can be adjusted by the pushing out and retracting action of the lifting rod.

[0073] In this embodiment, the clamping cover plate 12 has a second through hole 121 corresponding to the rotating shaft 5; the shifting device 100 also includes an adjusting gear 7, on the outer surface of which multiple transmission teeth are formed. The adjusting gear 7 is movably inserted into the second through hole 121 and fixedly connected to the rotating shaft 5; the rotating shaft 5 drives the adjusting gear 7 to rotate and move along the first direction. In this embodiment, to facilitate antenna adjustment, the adjusting gear 7 is provided on the rotating shaft 5. The rotation of the planetary gear 3 is transmitted to the outside through the adjusting gear 7, eliminating the need for additional adjustment devices on the planetary gear 3. This also avoids the planetary gear 3 meshing with multiple components simultaneously, which would prevent the transmission efficiency from being unadjustable. Furthermore, adjustment is still achieved through rotation, reducing costs and the size of the shifting device 100.

[0074] For further details, please refer to Figures 9 to 10The gear shifting device 100 further includes a mounting plate 8 and a support column 9; the mounting plate 8 is installed on the side of the planetary support 1 adjacent to the clamping cover plate 12, and the mounting plate 8 has a plurality of mounting holes, which are spaced apart corresponding to the rotation path of the planetary gear 3; a plurality of support columns 9 are provided corresponding to the mounting holes, and the plurality of support columns 9 are rotatably installed into the plurality of mounting holes, and an adjustment groove is recessed on the end face of the support column 9 facing the planetary support 1, and a mating tooth is formed on the inner sidewall of the adjustment groove, which is used to cooperate with the transmission gear for rotation; wherein, the adjustment tooth column 7 has a movable stroke along the first direction into the adjustment groove to drive the support column 9 to rotate. In this embodiment, to avoid interference between the adjusting toothed column 7 and other bearing columns 9 when driving the bearing column 9, the adjusting groove is provided on the bearing column 9. The adjusting toothed column 7 extends into the adjusting groove and cooperates with the adjusting groove, so that when the adjusting toothed column 7 rotates, it only drives the corresponding bearing column 9. The adjusting toothed column 7 is confined within the adjusting groove and does not interfere with the surrounding bearing columns 9.

[0075] In this embodiment, please refer to Figure 11 The shifting device 100 further includes an antenna lead screw, which is installed on the end of the support column 9 facing away from the planetary support 1. An antenna slider is provided on the antenna lead screw, and the antenna slider is used to support an external antenna. In this embodiment, the rotation of the support column 9 drives the antenna lead screw to rotate, thereby adjusting the position of the antenna slider, and thus adjusting the position of the external antenna.

[0076] Furthermore, the gear shifting device 100 also includes an anti-rotation structure to restrict the rotation of the support column 9, thereby maintaining the position of the support column 9 when it does not need to rotate.

[0077] It should be noted that the anti-rotation structure can be implemented in various ways. For example, by using a clamping member, the bearing column 9 can be clamped when it does not need to rotate, so as to avoid rotation; or an interference claw can be provided between the bearing column 9 and the mounting hole to prevent the bearing column 9 from rotating by interference installation.

[0078] For details, please refer to Figure 12In this embodiment, one end of the bearing column 9 facing the planetary support 1 is exposed outside the mounting plate 8. Multiple anti-rotation teeth 91 are provided on the side wall of the exposed end of the bearing column 9 on the mounting plate 8. The anti-rotation structure includes an anti-rotation member 101 and a pressing protrusion 102. The anti-rotation member 101 is mounted on the mounting plate 8 and positioned between the multiple bearing columns 9. Multiple elastic arms are provided on the anti-rotation member 101 corresponding to the multiple bearing columns 9. The free end of each elastic arm extends towards the bearing column 9 into the anti-rotation teeth 91. The pressing protrusion 102 is mounted on the end face of the clamping cover plate 12 facing the mounting plate 8 to push up the elastic arm towards the mounting plate 8, causing the elastic arm to disengage from the anti-rotation teeth 91. When the bearing column 9 does not need to rotate, the elastic arm naturally extends into the anti-rotation locking tooth 91, so that the bearing column 9 is locked and fixed and cannot rotate. When the bearing column 9 needs to rotate, the planetary support 1 rotates to the position of the corresponding bearing column 9, so that the top pressing protrusion 102 on the clamping cover plate 12 presses against the elastic arm, so that the elastic arm disengages from the anti-rotation locking tooth 91. At this time, the bearing column 9 can rotate freely again.

[0079] On the other hand, the gear shifting device 100 also includes a second drive motor 110, which drives the central gear 2 to rotate.

[0080] It should be noted that, in one embodiment of the present invention, the lifting structure and the second drive motor 110 coexist. In this embodiment, the drive screw 631 is rotatably sleeved on the output shaft of the second drive motor 110 in order to save space.

[0081] On the other hand, the gear shifting device 100 also includes a protective housing, and the planetary support 1, the central gear 2, the planetary gear 3 and the fixed gear ring 4 are all installed inside the protective housing.

[0082] Please see Figure 13 Based on the aforementioned gear shifting device 100, the present invention provides a specific embodiment.

[0083] In this specific embodiment, when the gear shifting device 100 is not activated, the mating protrusion 13 on the planetary support 1 abuts against the positioning protrusion 42 on the gear ring base plate 41, and is in the initial position.

[0084] When it is necessary to adjust different antennas separately, the second drive motor 110 is driven to drive the central gear 2 to rotate. At this time, the planetary gear 3 is in the rotating part under the action of the elastic member 61. The central gear 2 rotates, so that the planetary gear 3 rotates around the central gear 2 while rotating on its own axis, and is displaced to the corresponding bearing column 9 on the mounting plate 8.

[0085] After the planetary gear 3 moves to the corresponding position, the first drive motor 6333 is controlled to work, driving the drive screw 631 to rotate, thereby causing the screw slider 632 to move along the first direction, pushing the lifting rod 62 into the first through hole 111, abutting against the rotating shaft 5 and driving the rotating shaft 5 to move towards the clamping cover plate 12.

[0086] When the rotating shaft 5 moves, it pushes the adjusting toothed column 7 out of the second through hole and into the adjusting groove of the bearing column 9, and drives the adjusting groove through the transmission teeth and mating teeth; at this time, the pressing protrusion 102 on the planetary support 1 abuts against the elastic arm of the anti-rotation member 101, so that the elastic arm disengages from the anti-rotation locking tooth 91, and the bearing column 9 can rotate freely.

[0087] The second drive motor 110 is controlled to continue rotating. At this time, the planetary gear 3 is in the stationary rotation section. The planetary gear 3 begins to rotate and drives the support column 9 to rotate, so that the antenna lead rod on the support column 9 rotates, thereby adjusting the antenna.

[0088] After adjustment, the first drive motor 6333 is reversed so that the planetary gear 3 returns to the rotational position. At this time, the position of the planetary gear 3 can be further adjusted by the second drive motor 110 so as to return to the initial position or continue to make the next adjustment.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shift switching device characterized by comprising: The planetary support comprises: a planetary support, having a driving end and a rotating end arranged oppositely; a sun gear, having an axis extending along a first direction, the sun gear is rotatably mounted to the driving end along its axis, and the side tooth surface of the sun gear is sequentially formed with a revolution part and a fixed rotation part along the first direction; a planetary gear, having an axis extending along the first direction, the planetary gear is rotatably and movably mounted to the rotating end along its axis and the first direction, and is in mesh with the sun gear, the planetary gear has a movement stroke along the first direction to the revolution part or the fixed rotation part; the planetary support comprises a clamping bottom plate and a clamping cover plate arranged at intervals along the first direction, and the sun gear is between the clamping bottom plate and the clamping cover plate; and a fixed gear ring corresponding to the revolution part, the planetary gear is in mesh with the fixed gear ring when moving to the revolution part, and is out of mesh with the fixed gear ring when moving to the fixed rotation part; the planetary support comprises a clamping bottom plate and a clamping cover plate arranged at intervals along the first direction, and the sun gear is between the clamping bottom plate and the clamping cover plate; a rotating shaft extending along the first direction, the rotating shaft is between the clamping bottom plate and the clamping cover plate, the rotating shaft is rotatably and movably mounted to the rotating end along its axis and the first direction, and the planetary gear is fixedly mounted to the rotating shaft; and a jacking structure for driving the rotating shaft to move along the first direction; a first through hole corresponding to the rotating shaft is provided on the clamping bottom plate; the jacking structure comprises: a resilient member provided between the planetary gear and the opposite end surface of the clamping cover plate for driving the rotating shaft to move towards the clamping bottom plate; a jacking rod provided on one side of the planetary support adjacent to the clamping bottom plate and corresponding to the first through hole, the jacking rod is movably arranged along the first direction to abut on the rotating shaft from the first through hole, thereby driving the rotating shaft to move towards the clamping cover plate; and a driving device for driving the jacking rod to move; a mounting plate mounted to one side of the planetary support adjacent to the clamping cover plate, a plurality of mounting holes are provided on the mounting plate, and the mounting holes are arranged at intervals corresponding to the rotating path of the planetary gear; and a plurality of bearing columns corresponding to the mounting holes are provided; a rotation stopping structure for limiting the rotation of the bearing columns; one end of the bearing column towards the planetary support is arranged to be exposed outside the mounting plate, and a plurality of rotation stopping teeth are arranged on the side wall of the end of the bearing column exposed outside the mounting plate; the rotation stopping structure comprises: a rotation stopping member mounted on the mounting plate and between the bearing columns, a plurality of elastic arms corresponding to the bearing columns are provided on the rotation stopping member, and the free end of each elastic arm extends towards the bearing column into the rotation stopping teeth; and A top pressing protrusion is installed on the end surface of the mounting plate facing the clamping cover plate, which is used to lift the elastic arm towards the mounting plate, so that the elastic arm is released from the rotation stopping tooth.

2. The shift switching device according to claim 1, characterized by The driving device comprises: A driving screw rod is arranged along the first direction; A screw block is threaded on the driving screw rod, and the lifting rod is installed on the screw block; and A driving assembly drives the driving screw rod to rotate, so as to drive the screw block to move along the first direction.

3. The shift switching device according to claim 2, characterized by The driving assembly comprises: A transmission gear has a transmission axis arranged along the first direction, the rotating gear is arranged along the transmission axis, and the driving screw rod is fixedly installed on the transmission gear; A driving gear is engaged with the transmission gear; and A first driving motor drives the driving gear to rotate, so as to drive the transmission gear to rotate.

4. The shift switching apparatus according to claim 1, characterized by A second through hole is arranged on the clamping cover plate corresponding to the rotating shaft; The gear shifting device further comprises an adjusting tooth column, a plurality of transmission teeth are formed on the outer side surface of the adjusting tooth column, the adjusting tooth column is movably arranged in the second through hole, and the adjusting tooth column is fixedly connected with the rotating shaft; The rotating shaft drives the adjusting tooth column to rotate and move along the first direction.

5. The shift switching device according to claim 4, characterized by An adjusting groove is concavely arranged on the end surface of one end of the bearing column facing the planetary support, and a matching tooth is formed on the inner side wall of the adjusting groove, which is used to rotate with the transmission tooth; The adjusting tooth column has a movement stroke along the first direction into the adjusting groove, so as to drive the bearing column to rotate.

6. The shift switching apparatus according to claim 1, characterized by The gear shifting device further comprises a second driving motor, which drives the central gear to rotate.

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