阅读说明：本技术 一种具有克服反驱和纠错功能的微型步进直线电机 (Miniature stepping linear motor with functions of overcoming backdrive and error correction ) 是由 周志鹏 黄小军 于 2020-12-03 设计创作，主要内容包括：本发明涉及电机技术领域,公开了一种具有克服反驱和纠错功能的微型步进直线电机,包括：安装支架,安装支架上对称设有直线电机,直线电机上设有推动机构,安装支架上设有用于限制推动机构进行直线运动的直线运动导杆,安装支架上设有用于固定直线运动导杆的锁附垫块,直线电机的一端设有滚珠轴承,安装支架上设有用于保护滚珠轴承的护盖,安装支架上设有用于控制直线电机的控制电路。控制电路起控制作用,通过控制电路分别单独控制两个直线电机的独立动作,能感应直线电机推动负载所到达的位置并及时切断直线电机运行,避免电机推动负载达到机构当端堵转后发生反驱动作。(The invention relates to the technical field of motors, and discloses a miniature stepping linear motor with functions of overcoming backdriving and correcting errors, which comprises: the mounting bracket is symmetrically provided with linear motors, the linear motors are provided with pushing mechanisms, the mounting bracket is provided with linear motion guide rods used for limiting the pushing mechanisms to perform linear motion, the mounting bracket is provided with locking cushion blocks used for fixing the linear motion guide rods, one end of each linear motor is provided with a ball bearing, the mounting bracket is provided with a protective cover used for protecting the ball bearing, and the mounting bracket is provided with a control circuit used for controlling the linear motors. The control circuit plays a control role, the control circuit respectively and independently controls the independent actions of the two linear motors, the position where the linear motor pushes the load can be sensed, the linear motor can be cut off in time to operate, and the phenomenon that the motor pushes the load to reach the mechanism and the reverse driving action is generated after the end is blocked and rotated is avoided.)

1. A micro stepping linear motor having functions of overcoming backdriving and error correction, comprising: installing support (200), the symmetry is equipped with linear electric motor (100) on installing support (200), be equipped with pushing mechanism (3) on linear electric motor (100), be equipped with on installing support (200) and be used for the restriction pushing mechanism (3) carry out linear motion's linear motion guide arm (40), be equipped with on installing support (200) and be used for fixing the lock of linear motion guide arm (40) attaches cushion (5), the one end of linear electric motor (100) is equipped with ball bearing (6), be equipped with on installing support (200) and be used for the protection protecting cover (7) of ball bearing (6), be equipped with on installing support (200) and be used for control circuit (500) of linear electric motor (100).

2. The micro stepping linear motor with the function of overcoming the back drive and the error correction according to claim 1, wherein the linear motor (100) comprises a PM-type rotating motor body (110), one end of the motor body (110) is provided with a screw rod (130) for converting a screw motion into a linear motion, the other end of the motor body (110) is provided with a planetary reducer (160), and the planetary reducer (160) is welded and fixed with the motor body (110).

3. The micro stepping linear motor with the function of overcoming the back drive and the error correction according to claim 2, wherein the planetary reducer (160) comprises a planetary reduction housing (140), a plurality of planetary gear sets (150) are arranged in the planetary reduction housing (140), a gear wall (142) meshed with the plurality of planetary gear sets (150) is arranged in the planetary reduction housing (140), the planetary gear sets (150) are meshed with the central gear (121), and a reducer front cover (122) used for closing an opening of the planetary reduction housing (140) is arranged at one end of the planetary reduction housing (140).

4. The micro stepping linear motor (100) with counter-drive and fault-correction functions according to claim 3, wherein the planetary reduction housing (140) comprises a planetary reduction cylinder (141), and the axial center of the planetary reduction cylinder (141), the rotational axial center of the motor body (110), and the axial center of the screw rod (130) are all kept concentric.

5. The micro stepping linear motor with the functions of overcoming backdriving and correcting errors according to claim 3, wherein a buckle (143) is arranged on the planetary reduction shell (140), and a boss embedded with the buckle (143) is arranged on the motor body (110).

6. The micro stepping linear motor with the functions of overcoming back drive and correcting errors as claimed in claim 1, wherein a cylindrical hole (230) for installing the ball bearing (6) is formed in the installation support (200), and a circular inner hollow cylinder (210) for tightly fitting with the planetary reducer (160) is further formed in the installation support (200).

7. The micro stepping linear motor with the function of overcoming back drive and error correction according to claim 6, wherein the inner wall of the circular inner hollow cylinder (210) is provided with a groove (220) for mounting the planetary reducer (160).

8. The micro stepping linear motor with the functions of overcoming backdriving and correcting errors according to claim 1, wherein a first circular hole (240) and a second circular hole (250) are formed in the mounting bracket (200), the diameter of the first circular hole (240) is larger than that of the second circular hole (250), and the first circular hole (240) and the second circular hole (250) are used for assembling the linear motion guide rod (40).

9. The micro stepping linear motor with the function of overcoming backdriving and error correction according to claim 1, wherein the control circuit (500) is provided with a contact position point (510) and a contact switch (520), and the pushing mechanism (3) is provided with a touch lever (31) for touching the contact switch (520).

10. The micro stepping linear motor with the function of overcoming back drive and error correction according to claim 9, wherein a permanent magnet is installed at one end of the pushing mechanism (3).

Technical Field

The invention relates to the technical field of motors, in particular to a miniature stepping linear motor with functions of overcoming backdriving and correcting errors.

Background

A front camera of the mobile phone automatically ascends and descends, or a built-in camera of the smart television automatically ascends and descends, or a micro stepping motor is widely adopted in an automatic lifting mechanism of an electronic cigarette cartridge, a micro planetary gear box and a screw rod are matched, a nut component is matched on the screw rod, and the rotary motion of the motor is converted into the linear front and back motion of a nut.

In the prior art, the product assembly mode in the prior art is complicated and inconvenient to assemble, and the performance is reduced due to the loss of precision of key parts; and a set of mechanism only has the function of a single lift to need professional drive IC control, when needing two sets of structures of this kind of rectilinear motion function to specific occasion, just need two complete linear electric motor installation spaces, there is the waste in space utilization and the cost. In addition, when the lifting module in the industry is at the moving end of the moving mechanism, the motor can generate the phenomenon of reverse driving displacement, and the use effect is seriously influenced

Therefore, how to provide a micro-stepping linear motor to improve the product precision and overcome the backdriving is an urgent technical problem to be solved.

Disclosure of Invention

The invention aims to provide a miniature stepping linear motor to improve product precision and overcome backdriving.

To this end, according to a first aspect, an embodiment of the present invention discloses a micro stepping linear motor with functions of overcoming backdriving and error correction, including: the mounting bracket, the symmetry is equipped with linear electric motor on the mounting bracket, the last pushing mechanism that is equipped with of linear electric motor, be equipped with on the mounting bracket and be used for the restriction pushing mechanism carries out linear motion's linear motion guide arm, be equipped with on the mounting bracket and be used for fixing the lock of linear motion guide arm attaches the cushion, linear electric motor's one end is equipped with ball bearing, be equipped with on the mounting bracket and be used for the protection ball bearing's protecting cover, be equipped with on the mounting bracket and be used for control linear electric motor's control circuit.

Optionally, the linear motor includes a PM-type rotating motor body, one end of the motor body is provided with a screw rod for converting a spiral motion into a linear motion, the other end of the motor body is provided with a planetary reducer, and the planetary reducer is welded and fixed to the motor body.

Optionally, the planetary reduction gear includes the planet speed reduction shell, be equipped with a plurality of planet tooth group in the planet speed reduction shell, be equipped with in the planet speed reduction shell with a plurality of the tooth wall of planet tooth group meshing, planet tooth group and central tooth meshing, the one end of planet speed reduction shell is equipped with and is used for sealing the reduction gear protecgulum of planet speed reduction shell open-ended.

Optionally, the planetary reduction casing includes a planetary reduction cylinder, and an axis of the planetary reduction cylinder, a rotation axis of the motor body, and an axis of the screw rod are all concentric.

Optionally, a buckle is arranged on the planetary reduction casing, and a boss embedded with the buckle is arranged on the motor body.

Optionally, a cylindrical hole for mounting the ball bearing is formed in the mounting bracket, and a circular hollow cylinder for tightly fitting with the planetary reducer is further formed in the mounting bracket.

Optionally, the inner wall of the circular hollow cylinder is provided with a groove for mounting the planetary reducer.

Optionally, a first round hole and a second round hole are formed in the mounting bracket, the diameter of the first round hole is larger than that of the second round hole, and the first round hole and the second round hole are used for assembling the linear motion guide rod.

Optionally, the control circuit is provided with a contact position point and a contact switch, and the pushing mechanism is provided with a touch rod for touching the contact switch.

Optionally, a permanent magnet is mounted at one end of the pushing mechanism.

The invention has the following beneficial effects: the control circuit plays a control role, the control circuit respectively and independently controls the independent actions of the two linear motors, the position where the linear motor pushes the load can be sensed, the linear motor can be cut off in time to operate, and the phenomenon that the motor pushes the load to reach the mechanism and the reverse driving action is generated after the end is blocked and rotated is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is an exploded view of a micro stepping linear motor with functions of overcoming back drive and error correction disclosed in this embodiment;

fig. 2 is an exploded view of a linear motor in a micro stepping linear motor with functions of overcoming back drive and error correction disclosed in this embodiment;

fig. 3 is a schematic perspective view of a micro stepping linear motor with functions of overcoming back drive and error correction according to this embodiment;

fig. 4 is a schematic structural diagram of a planetary reduction housing in a micro stepping linear motor with functions of overcoming back drive and correcting errors disclosed in the present embodiment;

fig. 5 is a schematic structural diagram of a mounting bracket in a micro stepping linear motor with functions of overcoming back drive and error correction disclosed in the present embodiment;

fig. 6 is a schematic structural diagram of a control circuit in a micro stepping linear motor with functions of overcoming backdriving and error correction disclosed in this embodiment;

fig. 7 is a partial structural schematic view of a micro stepping linear motor with functions of overcoming back drive and error correction disclosed in this embodiment;

fig. 8 is a logic timing diagram of the motor driving in the micro stepping linear motor with the function of overcoming the back driving and the error correction disclosed in the present embodiment.

Reference numerals: 100. a linear motor; 110. a motor body; 130. a screw rod; 160. a planetary reducer; 121. a central tooth; 122. a reducer front cover; 140. a planetary reduction case; 141. a planetary reduction cylinder; 142. a tooth wall; 143. buckling; 150. a planetary gear set; 200. mounting a bracket; 210. a circular hollow cylinder; 220. a groove; 230. a cylindrical bore; 240. a first circular hole; 250. a second circular hole; 3. a pushing mechanism; 31. a touch lever; 40. a linear motion guide rod; 401. a circular truncated cone; 5. locking the cushion block; 500. a control circuit; 510. a contact location point; 520. a contact switch; 6. a ball bearing; 7. a protective cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The embodiment of the invention discloses a miniature stepping linear motor with functions of overcoming backdriving and correcting errors, which comprises the following components as shown in figures 1 and 3: the mounting bracket 200 is provided with linear motors 100 symmetrically on the mounting bracket 200, the linear motor 100 is provided with a pushing mechanism 3, the mounting bracket 200 is provided with a linear motion guide rod 40 for limiting the pushing mechanism 3 to perform linear motion, the mounting bracket 200 is provided with a locking cushion block 5 for fixing the linear motion guide rod 40, one end of the linear motor 100 is provided with a ball bearing 6, the mounting bracket 200 is provided with a protective cover 7 for protecting the ball bearing 6, and the mounting bracket 200 is provided with a control circuit 500 for controlling the linear motor 100. In the specific implementation process, one end of the linear motion guide rod 40 is provided with a circular truncated cone 401 sleeved with the locking cushion block 5.

It should be noted that the control circuit 500 plays a control role, and the control circuit 500 respectively and independently controls the independent actions of the two linear motors 100, so as to sense the position reached by the load pushed by the linear motor 100 and timely cut off the operation of the linear motor 100, thereby preventing the motor from pushing the load to reach the reverse driving action after the end of the mechanism is blocked.

As shown in fig. 1 and 2, the linear motor 100 includes a PM-type rotating motor body 110, a screw rod 130 for converting a screw motion into a linear motion is provided at one end of the motor body 110, a planetary reducer 160 is provided at the other end of the motor body 110, and the planetary reducer 160 is welded and fixed to the motor body 110.

As shown in fig. 1 and 2, the planetary reducer 160 includes a planetary reduction case 140, a plurality of planetary gear sets 150 are provided in the planetary reduction case 140, a gear wall 142 engaged with the plurality of planetary gear sets 150 is provided in the planetary reduction case 140, the planetary gear sets 150 are engaged with the center gear 121, and a reducer front cover 122 for closing an opening of the planetary reduction case 140 is provided at one end of the planetary reduction case 140.

As shown in fig. 2 and 4, the planetary reduction housing 140 includes a planetary reduction cylinder 141, and the axial center of the planetary reduction cylinder 141, the rotational axial center of the motor body 110, and the axial center of the screw 130 are all maintained concentric.

As shown in fig. 2 and 4, the planetary reduction housing 140 is provided with a buckle 143, and the motor body 110 is provided with a boss which is fitted with the buckle 143.

As shown in fig. 1 and 5, the mounting bracket 200 is provided with a cylindrical hole 230 for mounting the ball bearing 6, and the mounting bracket 200 is further provided with a circular inner hollow cylinder 210 for tightly fitting with the planetary gear unit 160.

As shown in fig. 1 and 5, the inner wall of the circular hollow cylindrical body 210 is provided with a groove 220 for mounting the planetary reducer 160.

As shown in fig. 1 and 5, the mounting bracket 200 is provided with a first circular hole 240 and a second circular hole 250, the diameter of the first circular hole 240 is larger than that of the second circular hole 250, and the first circular hole 240 and the second circular hole 250 are used for assembling the linear motion guide rod 40.

As shown in fig. 1, 6 and 7, the control circuit 500 is provided with a contact point 510 and a contact switch 520, and the pushing mechanism 3 is provided with a touch lever 31 for touching the contact switch 520.

As shown in fig. 8, when the touch rod 31 moves to one end, it touches the contact switch 520 arranged on the circuit board, and the outgoing signal is fed back to the control MCU to stop driving; and the contact position point 510 installed at the other end position of the moving mechanism on the circuit is a magnetic induction device, a permanent magnet is installed at the lower end of the pushing mechanism 3, when the pushing mechanism 3 moves downwards to the contact position point 510 of the control circuit 500, the contact position point 510 sends a signal to the control MCU, and the driving is stopped.

This patent lifting module's removal stroke is established, and the control speed of motor is controlled by the MCU of circuit, sends another time parameter that works as the end from motor mechanism as one and can be used to the operation of monitoring motor out of step to can accurate judgement and correct the removal of motor, can guarantee the accurate characteristic of motor.

As shown in fig. 1 and 6, a permanent magnet is attached to one end of the pushing mechanism 3.

The working principle is as follows: the control circuit 500 plays a control role, and the control circuit 500 respectively and independently controls the independent actions of the two linear motors 100, so that the positions where the linear motors 100 push the loads can be sensed, the linear motors 100 can be cut off in time, and the phenomenon that the motors push the loads to reach the mechanism and generate the back-driving action after the end of the mechanism is blocked is avoided.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.