CN215221935U - Transmission mechanism - Google Patents

Abstract

The utility model provides a transmission mechanism, including driving piece, linkage, first fixed pipe and driving medium, the driving piece is located the inside of first fixed pipe, the driving piece has and stretches out the output shaft of first fixed pipe, on the output shaft with the driving medium passes through linkage fixed connection, and the periphery of first fixed pipe is located to the driving medium cover. The transmission mechanism provided by the utility model has the advantages that the driving piece is arranged inside the first fixed pipe, the axial length of the transmission mechanism can be shortened, the space occupied by the transmission mechanism is reduced, the internal space of the transmission piece and the first fixed pipe in the transmission mechanism is fully utilized, the transmission mechanism is miniaturized, and the structural layout is easier to carry out; and driving medium and first fixed pipe still have the guard action to the driving piece, prevent that driving piece and other parts from colliding, still have dustproof and waterproof's effect.

Description

Transmission mechanism

Technical Field

The utility model belongs to the technical field of mechanical transmission, more specifically say, relate to a drive mechanism.

Background

The transmission mechanism is widely applied to the field of machinery, is a core component of mechanical transmission, and provides main power for the rotation, translation and other motions of an executing part. The transmission mechanism usually includes a motor, an electric motor, etc., and the motor or the electric motor directly drives the actuator to move after the speed reduction and the force increase of the speed reduction mechanism, or drives the actuator to move after the speed reduction and the force increase of the speed reduction mechanism and the rotation movement is converted into the linear movement through the screw rod mechanism. This just leads to the part that drive mechanism contained more, and especially when including screw mechanism, screw mechanism is longer, and shared space is great, and when drive mechanism was applied to miniature transmission field, can occupy too much space, can not miniaturize, can lead to other parts to be difficult to carry out spatial layout moreover.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a transmission to solve the great technical problem in space that the transmission that exists occupies among the prior art.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a transmission mechanism, includes driving piece, linkage, first fixed pipe and driving medium, the driving piece is located the inside of first fixed pipe, the driving piece has the output shaft that stretches out first fixed pipe, the output shaft with the driving medium passes through linkage fixed connection, the driving medium cover is located the periphery of first fixed pipe.

In one embodiment, a circuit board for controlling the driving member is further disposed inside the first fixing tube, and the circuit board is electrically connected to the driving member.

In one embodiment, the driving member includes a motor and a sensor for detecting and controlling a rotation speed of the motor, and the sensor is electrically connected to the circuit board.

In one embodiment, the drive member further comprises a speed reduction assembly, and the output shaft and the linkage member are connected through the speed reduction assembly.

In one embodiment, the transmission mechanism further includes a first supporting member and a second supporting member respectively used for axially limiting two ends of the circuit board, and the motor, the first supporting member, the circuit board and the second supporting member are sequentially arranged along the axial direction of the transmission member.

In one embodiment, one end of the first supporting part is provided with a first shaft shoulder for supporting the motor, the other end of the first supporting part is provided with a first clamping groove for limiting one end of the circuit board, and the second supporting part is provided with a second clamping groove for limiting the other end of the circuit board.

In one embodiment, the transmission mechanism further comprises a second fixing tube disposed in the first fixing tube and used for fixing the circuit board.

In one embodiment, the transmission mechanism further includes a third fixed pipe, and the motor, the second fixed pipe, and the third fixed pipe are sequentially arranged along an axial direction of the transmission member.

In one embodiment, the transmission is a sleeve or a screw.

In one embodiment, the outer circumferential wall of the first fixed tube is rotatably connected with the inner circumferential wall of the transmission member through a bearing.

The utility model provides a drive mechanism's beneficial effect lies in: compared with the prior art, the utility model discloses drive mechanism includes driving piece, linkage, first fixed pipe and driving medium, and the driving piece sets up in the inside of first fixed pipe, and the output shaft of driving piece and driving medium pass through the linkage fixedly, and the periphery at first fixed pipe is established to the driving medium cover. The driving piece is arranged inside the first fixing pipe, so that the axial length of the transmission mechanism can be shortened, the space occupied by the transmission mechanism is reduced, the internal spaces of the transmission piece and the first fixing pipe are fully utilized, the transmission mechanism is miniaturized, and the structural layout is easier to perform; moreover, driving medium and first fixed pipe still have the guard action to the driving piece, prevent that the driving piece from colliding with other parts, still have dustproof and waterproof's effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a front view of a transmission mechanism according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a first transmission mechanism according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a second transmission mechanism provided in an embodiment of the present invention;

fig. 4 is a partial cross-sectional view of an end of the transmission mechanism provided with a driving member according to an embodiment of the present invention;

fig. 5 is a perspective structural view of an internal structure of a first fixing tube according to an embodiment of the present invention;

fig. 6 is a perspective view of a first supporting member according to an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1-a driving member; 11-a motor; 12-a speed reduction assembly; 121-deceleration end caps; 13-an output shaft; 14-a linkage; 15-axial limit piece; 16-a sensor; 17-a circuit board; 2-a transmission part; 21-a second relief; 3-a nut; 41-a first end cap; 42-a second end cap; 61-a first stationary tube; 62-a second stationary tube; 63-a third stationary tube; 64-a bearing; 71-a first support; 711-a first shoulder; 712-a second shoulder; 713-third relief; 714-a first card slot; 72-a second support; 721-a third shoulder; 722-fourth shoulder.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

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

Now explain the utility model discloses drive mechanism that the embodiment provided. The transmission mechanism is widely applied to the field of mechanical transmission and provides a power source for the actuating member.

In one embodiment of the present invention, referring to fig. 1 to 3, the transmission mechanism includes a driving member 1, a linking member 14, a first fixing tube 61 and a transmission member 2. The driver 1 can output a rotational movement, in particular the driver 1 has an output shaft 13, which output shaft 13 rotates when the driver 1 is in operation. The link 14 is fixed to the output shaft 13 to be rotatable with the output shaft 13. The transmission part 2 is fixedly connected with the linkage part 14, namely, the transmission part 2 and the output shaft 13 are fixedly connected through the linkage part 14, the transmission part 2 can be driven to rotate by the operation of the transmission part 1, the transmission part 2 is sleeved on the periphery of the first fixed pipe 61, and the rotation axis of the transmission part 2 can be the central axis thereof, namely, the transmission part 1 can drive the transmission part 2 to rotate. The driving member 1 is disposed inside the first fixed tube 61, and one end of the output shaft 13 extends out of the first fixed tube 61, so as to be fixed to the driving member 2 through the linkage member 14, and the linkage member 14 and the driving member 2 are disposed outside the first fixed tube 61. Driving piece 1 sets up in the inside of first fixed pipe 61, the periphery at first fixed pipe 61 is established to driving medium 2 cover, hide driving piece 1 in the inside of first fixed pipe 61, firstly, can shorten drive mechanism's axial length, reduce the shared space of drive mechanism, make drive mechanism more miniaturized, secondly, driving medium 2 and first fixed pipe 61 can have the guard action to driving piece 1, can prevent driving piece 1 and other structure collisions, also can prevent that driving piece 1 laying dust or into water.

The transmission mechanism in the above embodiment includes a driving part 1, a linkage part 14, a first fixed pipe 61 and a transmission part 2, the driving part 1 is disposed inside the first fixed pipe 61, the output shaft 13 of the driving part 1 and the transmission part 2 are fixed by the linkage part 14, and the transmission part 2 is sleeved on the periphery of the first fixed pipe 61. By arranging the driving part 1 in the first fixing pipe 61, the axial length of the transmission mechanism can be shortened, the space occupied by the transmission mechanism is reduced, the internal spaces of the transmission part 2 and the first fixing pipe 61 are fully utilized, the transmission mechanism is miniaturized, and the structural layout is easier to perform; moreover, the transmission piece 2 and the first fixing tube 61 also have a protection effect on the driving piece 1, prevent the driving piece 1 from colliding with other parts, and have a dustproof and waterproof effect.

Optionally, the transmission member 2 is a sleeve. Or, the driving medium 2 is the lead screw, and at this moment, drive mechanism still can include nut 3, and the periphery of driving medium 2 has the external screw thread, and driving medium 2 is hollow lead screw promptly, and 3 covers of nut locate on driving medium 2, and nut 3 and driving medium 2 threaded connection. When the driving element 1 drives the driving element 2 to rotate, the nut 3 on the driving element 2 translates along the axis direction 2 of the driving element, so that the rotary motion output by the driving element 1 is converted into the linear motion of the nut 3. The specific structure of the transmission member 2 is not limited in the present invention, and the two are only examples of the transmission member 2.

In one embodiment of the present invention, please refer to fig. 4, when the driving member 2 is sleeved on the periphery of the first fixing tube 61. Because the diameter size of the output shaft 13 and the diameter size of the transmission piece 2 differ greatly, the output shaft 13 and the transmission piece 2 are both in contact with the linkage piece 14 through the arrangement of the linkage piece 14, and fixed connection is realized.

As one embodiment of the fixed connection between the linkage 14 and the output shaft 13, specifically, the linkage 14 is provided with a central hole, the output shaft 13 is disposed through the central hole, and an outer circumferential wall of the output shaft 13 may be in interference fit with an inner circumferential wall of the central hole, so that the output shaft 13 and the linkage 14 are fixed to each other. Optionally, a first key groove is formed in the output shaft 13, a second key groove is formed in the inner wall of the central hole, the connecting key is partially embedded in the first key groove and partially embedded in the second key groove, the output shaft 13 and the linkage member 14 can be limited in the circumferential direction through the arrangement of the connecting key, the connecting key bears partial circumferential shearing force, and the linkage member 14 and the output shaft 13 are prevented from rotating relative to each other in the circumferential direction when the connecting key is used for a long time. Optionally, one end of the output shaft 13 is disposed to penetrate through the linkage 14, that is, one end of the output shaft 13 is exposed to the linkage 14, an axial limiting member 15 is fixed on the end of the output shaft 13, and the linkage 14 is sandwiched between the axial limiting member 15 and the motor 11 of the driving member 1, or between the axial limiting member 15 and the speed reducing assembly 12, or between the axial limiting member 15 and a shaft shoulder of the output shaft 13, so as to axially limit the linkage 14. The exposed end of the output shaft 13 and the axial limiting member 15 may be connected in an interference fit manner, or the exposed end of the output shaft 13 has a screw thread, and the axial limiting member 15 is in threaded connection with the exposed end of the output shaft 13.

As one embodiment of the fixed connection between the linkage 14 and the transmission member 2, specifically, the linkage 14 is fixed inside the transmission member 2, and the outer peripheral wall of the linkage 14 is in interference fit with the inner peripheral wall of the transmission member 2, so as to realize the fixed connection between the linkage 14 and the transmission member 2, so that when the output shaft 13 of the driving member 1 rotates, the linkage 14 and the transmission member 2 are driven to rotate synchronously. Alternatively, the outer peripheral wall of the link 14 has a first concave-convex portion, the inner peripheral wall of the transmission member 2 has a second concave-convex portion 21, and the first concave-convex portion and the second concave-convex portion 21 are fitted to each other, so that the relative rotation in the circumferential direction of the link 14 and the transmission member 2 is restricted, and the link 14 and the transmission member 2 are always kept in synchronous rotation. The number of the first concave-convex parts is a plurality of and is uniformly distributed along the circumferential direction of the linkage part 14, the number of the second concave-convex parts 21 is a plurality of and is uniformly distributed along the circumferential direction of the inner circumferential wall of the transmission part 2, so that the outer circumferential wall of the linkage part 14 and the inner circumferential wall of the transmission part 2 are both in a tooth shape, and the two concave-convex parts are embedded with each other to prevent relative circumferential rotation. Alternatively, the outer peripheral wall of the link 14 is in interference fit with the inner peripheral wall of the transmission member 2, the outer periphery of the link 14 has a first concave-convex portion, and the inner peripheral wall of the transmission member 2 has a second concave-convex portion 21 engaged with the first concave-convex portion.

As another embodiment of the fixed connection of the linkage 14 and the transmission piece 2, in particular, the linkage 14 is fixed to an end of the transmission piece 2. The linkage piece 14 and the transmission piece 2 are fixedly connected through fixing pieces such as a threaded piece, a rivet pressing piece and a pin. Wherein, the first connecting hole has been seted up on the linkage 14, and the second connecting hole has been seted up to the terminal surface of driving medium 2, and the mounting passes first connecting hole and second connecting hole to make linkage 14 be fixed in the terminal surface of driving medium 2.

When the linkage member 14 is fixed inside the transmission member 2, the end of the transmission member 2 where the driving member 1 is arranged is covered with a first end cover 41, the other end cover of the transmission member 2 is covered with a second end cover 42, and the connection manner of the first end cover 41 and the second end cover 42 with the transmission member 2 is not limited herein. When the linkage member 14 is fixed to the end of the transmission member 2, the linkage member 14 can be used as the first end cap 41, and the end of the transmission member 2 away from the driving member 1 has a second end cap 42.

In one embodiment of the present invention, referring to fig. 2 and 3, the transmission mechanism includes a driving member 1, a transmission member 2, a nut 3 and a first fixing tube 61. The driving part 1 drives the driving part 2 to rotate, the nut 3 is in threaded connection with the driving part 2, and when the driving part 2 rotates, the nut 3 translates along the axis direction of the driving part 2. The first fixing tube 61 is disposed in the transmission member 2, and the driving member 1 is disposed in the first fixing tube 61. Because driving piece 1 is formed by a plurality of part combinations, first fixed pipe 61 is provided with the cooperation structure with driving piece 1 complex correspondingly, if do not set up first fixed pipe 61, the corresponding cooperation structure then needs to set up in driving medium 2, can lead to driving medium 2's manufacturing process too complicated, manufacturing cost sharply increases.

Wherein, when driving piece 1 during operation, driving piece 2 rotates along with it, and first fixed pipe 61 is fixed motionless, in order to make first fixed pipe 61 stably set up in driving piece 2, is provided with bearing 64 between the outer wall of first fixed pipe 61 and the inner wall of driving piece 2, makes driving piece 2 relatively first fixed pipe 61 stably rotate the time, first fixed pipe 61 stably supports in driving piece 2. The bearing 64 may be disposed at an end of the first fixing tube 61 and the driving member 2, so as to facilitate installation of the bearing 64. More specifically, the bearing 64 may be disposed at an end of the transmission member 2 away from the driving member 1 to avoid interference with the installation of the driving member 1. The end of the outer ring of the bearing 64 may extend radially outwards to form an annular protrusion, and the outer ring of the bearing 64 may be fixedly connected to the transmission member 2 by a fastener such as a screw passing through the annular protrusion and being screwed to the end of the transmission member.

In one embodiment of the present invention, please refer to fig. 4, a circuit board 17 is disposed inside the first fixing tube, and the circuit board 17 is electrically connected to the driving member 1 for controlling the start/stop, the rotation speed, and the like of the driving member 1. The circuit board 17 can be fastened to the drive element 1, for example to the motor 11 of the drive element 1, or to the inner wall of the first fastening tube 61.

In one embodiment of the present invention, referring to fig. 4, the driving member 1 includes a motor 11 and a sensor 16. The motor 11 can output a rotational movement, and the power part in the drive member 1 includes, but is not limited to, the motor 11. The sensor 16 is used for detecting and controlling the rotating speed of the motor 11, the circuit board 17 is used for controlling the on-off of the motor 11 and is matched with the sensor 16 to control the rotating speed of the motor 11, and the sensor 16 is electrically connected with the circuit board 17. The sensor 16 can be selected as a hall sensor 16, the output end of the motor 11 is fixedly connected with a magnetic ring, the output end of the motor 11 and the magnetic ring rotate synchronously, namely, the rotating speed of the motor 11 is the same as that of the magnetic ring, the hall sensor 16 can obtain the rotating speed of the motor 11 by detecting the rotating speed of the magnetic ring, the rotating speed detected by the hall sensor 16 can be fed back to the circuit board 17, if the rotating speed is less than the instruction rotating speed, the rotating speed of the motor 11 is increased, and if the rotating speed is greater than the instruction rotating speed, the rotating speed of the motor 11 is reduced, so that the rotating speed of the motor 11 is controlled.

Optionally, the driving member 1 further includes a speed reducing assembly 12, the speed reducing assembly 12 is connected to an output end of the motor 11, power is input by the motor 11, and after the speed reducing assembly 12 reduces, the driving member 2 can output a rotation motion with a smaller rotation speed, and the driving member 2 is rotated through the linkage 14. The reduction assembly 12 may be a gear reduction assembly, which may be embodied as a planetary gear reducer, a parallel gear reducer, or the like. The output shaft of the speed reducing assembly 12 is the output shaft 13 of the driving member 1.

Optionally, one end of the speed reducing assembly 12 has a speed reducing end cap 121, and when the driving member 1 is disposed inside the first fixing tube 61, the speed reducing end cap 121 covers the end of the first fixing tube 61 to close the end of the first fixing tube 61, so as to protect the driving member 1 therein. The reduction end cap 121 may be fixed to the end of the first fixing tube 61 by screws, rivets, pins, or the like.

Optionally, the sensor 16 and the circuit board 17 are disposed outside the motor 11, and since the sensor 16 needs to perform magnetic induction with a magnetic ring on the motor 11 and needs to be electrically connected to the circuit board 17, the sensor 16 is disposed between the circuit board 17 and the motor 11, so as to facilitate connection between the sensor 16 and the circuit board 17 and magnetic induction between the sensor 16 and the magnetic ring of the motor 11.

In one embodiment of the present invention, referring to fig. 3 and 5, the driving member 2 further has a first supporting member 71 and a second supporting member 72 inside. The first support 71 and the second support 72 are used to support and position the sensor 16 and the circuit board 17. Specifically, the sensor 16 is fixed on the first support 71, and the first support 71 and the second support 72 are respectively used for axially limiting two ends of the circuit board 17, so as to prevent the circuit board 17 from axially moving. The manner of fixing the sensor 16 and the first support 71 is not limited herein. The sensor 16 may also be fixed to the rear end of the motor 11. In the axial direction of the transmission member 2, the motor 11, the first supporting member 71, the circuit board 17 and the second supporting member 72 are sequentially arranged, so that the axial limit of the circuit board 17 by the first supporting member 71 and the second supporting member 72 is realized.

Optionally, a first fixing tube 61 is arranged in the transmission member 2, the driving member 1 is arranged in the first fixing tube 61, at this time, the outer peripheral wall of the first support 71 and the outer peripheral wall of the second support 72 can be mutually abutted and matched with the inner wall of the first fixing tube 61, so as to circumferentially position the first support 71 and the second support 72, prevent the first support 71 and the second support 72 from circumferentially shaking in the first fixing tube 61, and further prevent the circuit board 17 and the sensor 16 from shaking. The outer peripheries of the first support 71 and the second support 72 are provided with a third concave-convex part 713, the inner wall of the first fixing tube 61 is provided with a fourth concave-convex part, and the outer wall of the first support 71 and the outer wall of the second support 72 are both in concave-convex fit with the inner wall of the first fixing tube 61, so that the first support 71 and the second support 72 are circumferentially positioned in the first fixing tube 61.

Referring to fig. 3 and 6, as one embodiment of the first supporting member 71 and the second supporting member 72 respectively axially limiting two ends of the circuit board 17, specifically, one end of the first supporting member 71 facing the circuit board 17 has a first slot 714, one end of the second supporting member 72 facing the circuit board 17 has a second slot, and two ends of the circuit board 17 are respectively inserted into the first slot 714 and the second slot, so as to axially and circumferentially limit the circuit board 17. Referring to fig. 6, the first card slot 714 is a sheet-shaped slot, or is composed of two U-shaped slots with opposite openings, so that the sheet-shaped circuit board 17 can be inserted into the first card slot 714. The second card slot may be selected to have the same structure as the first card slot 714, and is not described herein.

In one embodiment of the present invention, referring to fig. 3, the first supporting member 71 is disposed between the motor 11 and the circuit board 17, a first shoulder 711 is disposed at one end of the first supporting member 71 facing the motor 11, and an end of the motor 11 abuts against the first shoulder 711, so that an axial position of the first supporting member 71 is fixed. The first shoulder 711 may be disposed on an inner wall or an outer wall of the first support 71, and the specific location is not limited herein.

In one embodiment of the present invention, referring to fig. 3, a second fixing tube 62 is disposed between the first supporting member 71 and the second supporting member 72, and the circuit board 17 is disposed inside the second fixing tube 62. The second fixing tube 62 can protect the circuit board 17 and has a certain insulating function, so that the safety performance of the transmission mechanism can be improved; in addition, the first supporting member 71, the second fixing tube 62 and the second supporting member 72 are connected in sequence to form a module, and the module is put into the transmission member 2 after the module is completed, so that the installation, the disassembly and the replacement are more convenient. The end of the first support 71 facing the second fixing tube 62 has a second shoulder 712, or the end of the second fixing tube 62 facing the first support 71 has a shoulder, so that the first support 71 and the second fixing tube 62 are supported to each other. An end of the second supporter 72 facing the second fixing tube 62 has a third shoulder 721, or an end of the second fixing tube 62 facing the second supporter 72 has a shoulder, so that the second fixing tube 62 and the second supporter 72 support each other. The first shoulder 711, the second shoulder 712, and the third shoulder 721 are all annular bosses. In other embodiments of the present invention, the first supporting member 71 and the second fixing tube 62, the second supporting member 72 and the second fixing tube 62 can also be connected by screws, pins, or other fixing members, so that the first supporting member 71, the second fixing tube 62, the second supporting member 72, the circuit board 17 and the sensor 16 can be assembled into a module, and then installed in the transmission member 2, thereby facilitating installation, detachment and replacement.

When the first fixing tube 61 is disposed in the transmission member 2, the first supporting member 71, the second fixing tube 62, and the second supporting member 72 are disposed in the first fixing tube 61. The outlines of the first support 71 and the second support 72 are matched with the inner outline of the first fixed pipe 61, the second fixed pipe 62 is positioned through the first support 71 and the second support 72, the outer wall of the second fixed pipe 62 does not need to be in contact with the inner wall of the first fixed pipe 61, and friction force during installation is small, so that the installation of the inner structure of the first fixed pipe 61 is facilitated. The outer diameter of the second fixing tube 62 is smaller than the inner diameter of the first fixing tube 61, so that the second fixing tube 62 may not contact the first fixing tube 61.

Optionally, referring to the body 3, a third fixed pipe 63 is further disposed inside the transmission member 2. The length of the transmission member 2 is set according to the required moving stroke of the transmission mechanism, when the driving member 1 is installed inside the transmission member 2, the sum of the axial lengths of the motor 11, the first supporting member 71, the second fixing tube 62 (close to the length of the circuit board 17), and the second supporting member 72 is often smaller than the length of the transmission member 2, in order to ensure the axial stability of the first supporting member 71, the second fixing tube 62, and the second supporting member 72, the third fixing tube 63 is arranged at one end of the second supporting member 72, which is opposite to the circuit board 17, so that the first supporting member 71, the second fixing tube 62, the second supporting member 72, and the third fixing tube 63 are sequentially abutted along the axial direction of the transmission member 2, and a section of empty space in the transmission member 2 is filled. One end of the first supporting member 71, which is opposite to the second fixing tube 62, abuts against the motor 11, and one end of the third fixing tube 63, which is opposite to the second supporting member 72, abuts against the second end cap 42 or the base of the transmission mechanism, so that a stable connection structure is formed inside the transmission member 2. The end of the second supporting member 72 facing the third fixed pipe 63 is provided with a fourth shoulder 722 for abutting against the third fixed pipe 63.

In other embodiments, the transmission mechanism may also include the second fixing tube 62, but does not include the first and second supports 71 and 72, and the circuit board 17 may be disposed inside the second fixing tube 62. More specifically, the circuit board 17 may be fixed by adhesion by an adhesive or the like to the inside of the second fixing tube 62, or may be fixed by a screw or the like to the inside of the second fixing tube 62. The transmission mechanism may further include a third fixing tube 63, and the motor 11, the second fixing tube 62, and the third fixing tube 63 are sequentially disposed along the axial direction of the transmission member 2 and are disposed inside the first fixing tube 61. The length of circuit board 17 is fixed, and second fixed pipe 62 is equivalent to the length of circuit board 17, and the setting of third fixed pipe prevents first fixed pipe 61 and second fixed pipe 62 from rocking in the axial for filling the empty space of the inside of first fixed pipe 61.

Optionally, referring to fig. 3 and 5, the first supporting member 71 and the second supporting member 72 are hollow cylinders, and are adapted to the inner wall of the second fixing tube 62 or the transmission member 2, and the heat generated by the circuit board 17 can be quickly dissipated axially in the transmission member 2, so as to further increase the speed of heat dissipation and prevent the temperature of the transmission member 2 from being too high.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A transmission mechanism is characterized in that: including driving piece, linkage, first fixed pipe and driving medium, the driving piece is located the inside of first fixed pipe, the driving piece has the output shaft that stretches out first fixed pipe, the output shaft with the driving medium passes through linkage fixed connection, the driving medium cover is located the periphery of first fixed pipe.

2. The transmission mechanism of claim 1, wherein: the inside of first fixed pipe still is equipped with and is used for controlling the circuit board of driving piece, the circuit board with driving piece electric connection.

3. The transmission mechanism of claim 2, wherein: the driving piece comprises a motor and a sensor for detecting and controlling the rotating speed of the motor, and the sensor is electrically connected with the circuit board.

4. The transmission mechanism of claim 3, wherein: the driving piece further comprises a speed reducing assembly, and the output shaft is connected with the linkage piece through the speed reducing assembly.

5. The transmission mechanism of claim 3, wherein: the transmission mechanism further comprises a first supporting piece and a second supporting piece which are used for limiting the two ends of the circuit board in the axial direction respectively, and the motor, the first supporting piece, the circuit board and the second supporting piece are sequentially arranged in the axial direction of the transmission piece.

6. The transmission mechanism of claim 5, wherein: one end of the first supporting piece is provided with a first shaft shoulder used for supporting the motor, the other end of the first supporting piece is provided with a first clamping groove used for limiting one end of the circuit board, and the second supporting piece is provided with a second clamping groove used for limiting the other end of the circuit board.

7. The transmission mechanism of claim 3, wherein: the transmission mechanism further comprises a second fixing pipe, and the second fixing pipe is arranged in the first fixing pipe and used for fixing the circuit board.

8. The transmission mechanism of claim 7, wherein: the transmission mechanism further comprises a third fixing pipe, and the motor, the second fixing pipe and the third fixing pipe are sequentially arranged along the axial direction of the transmission piece.

9. The transmission mechanism as claimed in any one of claims 1 to 8, wherein: the transmission part is a sleeve or a screw rod.

10. The transmission mechanism as claimed in any one of claims 1 to 8, wherein: the periphery wall of first fixed pipe with through the bearing rotation connection between the internal perisporium of driving medium.

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