Rotary driving mechanism

Abstract

The utility model discloses a rotation driving mechanism which comprises a base plate, a rotating shaft, a driven wheel, a rotation driving piece, a magnetic ring and a magnetic encoder. The rotating shaft is rotatably mounted on the base plate; the driven wheel and the rotating shaft are coaxial and fixedly connected; the rotary driving part is fixedly mounted on the base plate and is used for driving the driven wheel to rotate; an annular groove is formed in the driven wheel, and at least part of the magnetic ring is arranged in the annular groove; the magnetic coding chip is fixedly installed on the substrate, when the driven wheel is in a rotating state, the magnetic ring and the magnetic coding chip rotate relatively, and the magnetic coding chip induces rotation of the magnetic ring to obtain rotation information of the driven wheel. According to the rotation driving mechanism, the magnetic ring is arranged on the driven wheel, the magnetic coding chip is arranged on the substrate, the magnetic coding chip reads the rotation of the induction magnetic ring to obtain the rotation information of the driven wheel, and the position precision error of a load end caused by the precision error of a transmission system can be effectively reduced; the magnetic ring is arranged in the annular groove of the driven wheel, so that the overall structure is more compact.

Description

Technical Field

[0001] The utility model relates to the technical field of driving, in particular to a rotary driving mechanism. Background Art

[0002] Existing rotary machines often use DC motors with reducers as drive mechanisms, and some rotary machines use DC motors with synchronous pulleys as drive mechanisms. In powered rotary machines, the servo system of the motor is usually used, and its rotation accuracy will be reduced after transmission, so there is an urgent need for a rotary drive mechanism with a compact structure and good control accuracy. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a rotary drive mechanism with compact structure and high rotation accuracy.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a rotary drive mechanism, comprising:

[0005] substrate;

[0006] A rotating shaft, the rotating shaft is rotatably mounted on the base plate;

[0007] A driven wheel, the driven wheel is coaxial with the rotating shaft and fixedly connected;

[0008] A rotating driving member, which is fixedly mounted on the base plate and is used to drive the driven wheel to rotate;

[0009] A magnetic ring, wherein a ring groove is provided on the driven wheel, and at least a part of the magnetic ring is arranged in the ring groove;

[0010] Magnetic encoding chip: The magnetic encoding chip is fixedly mounted on the substrate. When the driven wheel is in a rotating state, the magnetic ring and the magnetic encoding chip rotate relative to each other. The magnetic encoding chip senses the rotation of the magnetic ring to obtain the rotation information of the driven wheel.

[0011] Furthermore, the depth of the annular groove is greater than or equal to the thickness of the magnetic ring.

[0012] Furthermore, it also includes a synchronous belt and a driving wheel, the driving wheel is fixedly connected to the output shaft of the rotating drive member, and the driving wheel and the driven wheel are driven by the synchronous belt.

[0013] Furthermore, at least one first bearing is provided between the rotating shaft and the base plate.

[0014] Furthermore, it also includes a first bracket, which is fixedly connected to the base plate, the base plate is provided with at least one positioning column, the first bracket is provided with a positioning hole that cooperates with the positioning column, and the magnetic encoding chip is detachably connected to the first bracket.

[0015] Furthermore, it also includes a second bracket, the second bracket is fixedly connected to the base plate, the rotation drive member is fixedly installed on the second bracket, the second bracket is provided with a second bearing, and the output shaft of the rotation drive member is plug-fitted with the second bearing.

[0016] Furthermore, a plurality of mounting holes are provided at one end of the rotating shaft away from the driven wheel.

[0017] Furthermore, a protruding annular boss is provided at one end of the driven wheel, and the end of the rotating shaft is adapted to the shape of the annular boss.

[0018] Furthermore, the rotating drive member is a stepping motor.

[0019] The beneficial effects of the utility model are as follows: the rotary drive mechanism of the present application can effectively reduce the load end position accuracy error caused by the transmission system accuracy error by arranging a magnetic ring on the driven wheel and arranging a magnetic encoding chip on the substrate, so that the magnetic encoding chip reads the rotation of the induction magnetic ring to obtain the rotation information of the driven wheel; the magnetic ring is arranged in the ring groove of the driven wheel, making the overall structure more compact and reducing the influence of the magnetic ring and the magnetic encoding chip on the overall appearance size. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of the rotary drive mechanism of the first embodiment of the utility model;

[0021] Figure 2 It is a cross-sectional view of the rotary drive mechanism of the first embodiment of the utility model.

[0022] Description of labels:

[0023] 1. Base plate; 11. First bearing; 12. First bracket; 121. Positioning hole; 13. Positioning column; 14. Second bracket; 15. Second bearing; 16. Mounting hole;

[0024] 2. Rotation axis;

[0025] 3. driven wheel; 31. annular groove; 32. annular boss;

[0026] 4. Rotating drive parts;

[0027] 5. Magnetic ring;

[0028] 6. Magnetic encoding chip;

[0029] 7. Driving wheel; 71. Timing belt. DETAILED DESCRIPTION

[0030] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0031] Please refer to Figure 1 and Figure 2 , a rotary drive mechanism, comprising:

[0032] substrate1;

[0033] A rotating shaft 2, the rotating shaft 2 is rotatably mounted on the base plate 1;

[0034] A driven wheel 3, which is coaxial with the rotating shaft 2 and fixedly connected;

[0035] A rotating driving member 4, which is fixedly mounted on the base plate 1 and is used to drive the driven wheel 3 to rotate;

[0036] The magnetic ring 5, the driven wheel 3 is provided with an annular groove 31, and at least a part of the magnetic ring 5 is arranged in the annular groove 31;

[0037] The magnetic encoding chip 6 is fixedly mounted on the substrate 1 . When the driven wheel 3 is in a rotating state, the magnetic ring 5 and the magnetic encoding chip 6 rotate relatively. The magnetic encoding chip 6 senses the rotation of the magnetic ring 5 to obtain the rotation information of the driven wheel 3 .

[0038] From the above description, it can be seen that the beneficial effects of the utility model are: the rotary drive mechanism of the present application is provided with a magnetic ring 5 on the driven wheel 3, and a magnetic encoding chip 6 on the substrate 1, so that the magnetic encoding chip 6 reads the rotation of the induction magnetic ring 5 to obtain the rotation information of the driven wheel 3, which can effectively reduce the load end position accuracy error caused by the accuracy error of the transmission system; the magnetic ring 5 is arranged in the annular groove 31 of the driven wheel 3, so that the overall structure is more compact, and the influence of the arrangement of the magnetic ring 5 and the magnetic encoding chip 6 on the overall appearance size is reduced.

[0039] Furthermore, the depth of the annular groove 31 is greater than or equal to the thickness of the magnetic ring 5 .

[0040] It can be seen from the above description that the magnetic ring 5 can be completely received in the annular groove 31 , thereby avoiding the influence of the external dimensions of the driven wheel 3 due to the provision of the magnetic ring 5 .

[0041] Furthermore, it also includes a synchronous belt 71 and a driving wheel 7 , wherein the driving wheel 7 is fixedly connected to the output shaft of the rotary drive member 4 , and the driving wheel 7 and the driven wheel 3 are driven by the synchronous belt 71 .

[0042] It can be seen from the above description that the transmission connection relationship between the rotating driving member 4 and the driven wheel 3 is simple, the transmission ratio is accurate, and the transmission efficiency is high.

[0043] Furthermore, at least one first bearing 11 is disposed between the rotating shaft 2 and the base plate 1 .

[0044] It can be seen from the above description that the first bearing 11 can reduce the friction between the rotating shaft 2 and the substrate 1 , so that the rotating shaft 2 rotates more smoothly.

[0045] Furthermore, it also includes a first bracket 12, which is fixedly connected to the substrate 1. The substrate 1 is provided with at least one positioning column 13. The first bracket 12 is provided with a positioning hole 121 that cooperates with the positioning column 13. The magnetic encoding chip 6 is detachably connected to the first bracket 12.

[0046] It can be seen from the above description that the cooperation between the positioning column 13 and the positioning hole 121 can improve the assembly accuracy of the first bracket 12 and the substrate 1, thereby improving the relative position accuracy of the magnetic encoder and the substrate 1.

[0047] Furthermore, it also includes a second bracket 14, which is fixedly connected to the base plate 1, and the rotary drive member 4 is fixedly installed on the second bracket 14. The second bracket 14 is provided with a second bearing 15, and the output shaft of the rotary drive member 4 is plugged into and matched with the second bearing 15.

[0048] It can be seen from the above description that the second bearing 15 is used to limit the output shaft of the driving wheel 7 and the rotary driving member 4 and ensure that the output shaft of the rotary driving member 4 rotates smoothly.

[0049] Furthermore, a plurality of mounting holes 16 are provided at one end of the rotating shaft 2 away from the driven wheel 3 .

[0050] It can be known from the above description that the rotating shaft 2 can be fixedly connected to the external component through the mounting hole 16 .

[0051] Furthermore, a protruding annular boss 32 is provided at one end of the driven wheel 3 , and the end of the rotating shaft 2 is adapted to the shape of the annular boss 32 .

[0052] As can be seen from the above description, the annular boss 32 is adapted to the end of the rotating shaft 2 to limit the relative position of the driven wheel 3 and the rotating shaft 2 and improve the coaxiality.

[0053] Furthermore, the rotary drive member 4 is a stepping motor.

[0054] It can be seen from the above description that the rotary drive member 4 is easy to obtain and the rotation process of its output shaft is highly controllable.

[0055] Please refer to Figure 1 and Figure 2 , Embodiment 1 of the present utility model is: a rotary drive mechanism for providing torque to an external component.

[0056] The rotary drive mechanism includes a substrate 1, a rotating shaft 2, a driven wheel 3, a rotary drive member 4, a magnetic ring 5 and a magnetic encoder; the rotating shaft 2 is rotatably mounted on the substrate 1; the driven wheel 3 is coaxial with the rotating shaft 2 and fixedly connected; the rotary drive member 4 is fixedly mounted on the substrate 1, and the rotary drive member 4 is used to drive the driven wheel 3 to rotate; the driven wheel 3 is provided with an annular groove 31, the annular groove 31 is coaxially arranged with the driven wheel 3, and at least part of the area of ​​the magnetic ring 5 is arranged in the annular groove 31; the magnetic encoding chip 6 is fixedly mounted on the substrate 1, and when the driven wheel 3 is in a rotating state, the magnetic ring 5 rotates relative to the magnetic encoding chip 6, and the magnetic encoding chip 6 senses the rotation of the magnetic ring 5 to obtain the rotation information of the driven wheel 3. Specifically, the driven wheel 3 is fixed to the rotating shaft 2 by screws. The rotary drive member 4 is preferably a stepper motor.

[0057] In order to completely accommodate the magnetic ring 5 in the annular groove 31, the depth of the annular groove 31 is greater than or equal to the thickness of the magnetic ring 5. In other embodiments, the depth of the annular groove 31 is less than the thickness of the magnetic ring 5, and it is also feasible to place a part of the magnetic ring 5 in the annular groove 31.

[0058] Preferably, the rotary drive mechanism further comprises a synchronous belt 71 and a driving wheel 7 , the driving wheel 7 is fixedly connected to the output shaft of the rotary drive member 4 , and the driving wheel 7 and the driven wheel 3 are driven by the synchronous belt 71 .

[0059] At least one first bearing 11 is disposed between the rotating shaft 2 and the base plate 1. Specifically, the number of the first bearings 11 is two, and the two first bearings 11 are disposed at intervals along the axial direction of the rotating shaft 2. In other embodiments, the number of the first bearings 11 may be one, three or more.

[0060] The rotary drive mechanism further includes a first bracket 12, which is fixedly connected to the base plate 1 by screws, and at least one positioning column 13 is provided on the base plate 1, and a positioning hole 121 cooperating with the positioning column 13 is provided on the first bracket 12, and the magnetic encoding chip 6 is detachably connected to the first bracket 12. Specifically, the positioning column 13 is cylindrical, and the positioning hole 121 is set to be circular corresponding to the positioning column 13. There are two positioning columns 13, and the positioning columns 13 and the positioning holes 121 are set one by one. In other embodiments, the positioning column 13 can be set to be prismatic.

[0061] The rotary drive mechanism further comprises a second bracket 14 , which is fixedly connected to the base plate 1 by screws, and the rotary drive member 4 is fixedly mounted on the second bracket 14 . A second bearing 15 is arranged on the second bracket 14 , and the output shaft of the rotary drive member 4 is plugged into and matched with the second bearing 15 .

[0062] A plurality of mounting holes 16 are provided at one end of the rotating shaft 2 away from the driven wheel 3. The rotating shaft 2 can be fixedly connected to an external component through the mounting holes 16.

[0063] A protruding annular boss 32 is provided at one end of the driven wheel 3, and the end of the rotating shaft 2 is adapted to the shape of the annular boss 32. Specifically, the annular boss 32 and the driven wheel 3 are an integral structure formed in one piece. The annular boss 32 is in the shape of a circular ring, and the annular boss 32 is coaxially arranged with the driven wheel 3, and the inner diameter of the annular boss 32 is equal to the outer diameter of the rotating shaft 2. It is easy to understand that the adaptation of the annular boss 32 to the end of the rotating shaft 2 can limit the relative position of the driven wheel 3 and the rotating shaft 2, thereby improving the coaxiality.

[0064] In summary, the rotary drive mechanism provided by the utility model can effectively reduce the load end position accuracy error caused by the accuracy error of the transmission system by arranging a magnetic ring on the driven wheel and a magnetic encoding chip on the substrate, so that the magnetic encoding chip reads the rotation of the induction magnetic ring to obtain the rotation information of the driven wheel; the magnetic ring is arranged in the ring groove of the driven wheel, which makes the overall structure more compact and reduces the influence of the magnetic ring and the magnetic encoding chip on the overall appearance size.

[0065] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A rotary drive mechanism, characterized in that: include: substrate; A rotating shaft, the rotating shaft is rotatably mounted on the base plate; A driven wheel, the driven wheel is coaxial with the rotating shaft and fixedly connected; A rotating driving member, which is fixedly mounted on the base plate and is used to drive the driven wheel to rotate; A magnetic ring, wherein a ring groove is provided on the driven wheel, and at least a part of the magnetic ring is arranged in the ring groove; Magnetic encoding chip: The magnetic encoding chip is fixedly mounted on the substrate. When the driven wheel is in a rotating state, the magnetic ring and the magnetic encoding chip rotate relative to each other. The magnetic encoding chip senses the rotation of the magnetic ring to obtain the rotation information of the driven wheel.

2. A rotary drive mechanism according to claim 1, characterized in that: The depth of the annular groove is greater than or equal to the thickness of the magnetic ring.

3. A rotary drive mechanism according to claim 1, characterized in that: It also includes a synchronous belt and a driving wheel, wherein the driving wheel is fixedly connected to the output shaft of the rotating drive member, and the driving wheel and the driven wheel are driven by the synchronous belt.

4. A rotary drive mechanism according to claim 1, characterized in that: At least one first bearing is disposed between the rotating shaft and the base plate.

5. A rotary drive mechanism according to claim 1, characterized in that: It also includes a first bracket, which is fixedly connected to the base plate. The base plate is provided with at least one positioning column. The first bracket is provided with a positioning hole that cooperates with the positioning column. The magnetic encoding chip is detachably connected to the first bracket.

6. A rotary drive mechanism according to claim 1, characterized in that: It also includes a second bracket, which is fixedly connected to the base plate, and the rotary drive member is fixedly installed on the second bracket. The second bracket is provided with a second bearing, and the output shaft of the rotary drive member is plug-fitted with the second bearing.

7. A rotary drive mechanism according to claim 1, characterized in that: A plurality of mounting holes are provided at one end of the rotating shaft away from the driven wheel.

8. A rotary drive mechanism according to claim 1, characterized in that: One end of the driven wheel is provided with a protruding annular boss, and the end of the rotating shaft is adapted to the shape of the annular boss.

9. A rotary drive mechanism according to claim 1, characterized in that: The rotary drive member is a stepping motor.

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