DC low-voltage servo motor

Abstract

The utility model discloses a DC low-voltage servo motor, which comprises a motor main body and a control part connected to the rear end of the motor main body, the motor main body comprises a motor shell, and a stator, a rotor and a motor shaft which are mounted in the motor shell; the control part comprises an encoder, a control shell covering the encoder and a junction box installed outside the control shell, the encoder is installed on the motor shell, the control shell comprises a connecting part and a rotating part, the junction box is rotatably installed on the rotating part, the connecting part is fixedly connected with the motor shell, and the rotating part is rotatably arranged on the connecting part; a through groove is formed in the motor shell, so that a motor power line extends into the control shell, and the motor power line and the encoder wire are both connected with a wiring terminal of the junction box; according to the utility model, the position of the junction box can be changed, compared with a conventional servo motor, the servo motor has better adaptability to a narrow installation space, and diversified requirements of customers can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to servo motor field, especially in a kind of DC low voltage servo motor. BACKGROUND

[0002] DC low voltage servo motor is widely used in robot, automation equipment, medical equipment, printing equipment, electronic equipment and the scene needing accurate control, servo motor has terminal box, bears the important role of connecting driver and motor, transmission control signal and power supply, but terminal box protrudes from motor, in some narrow installation space exists installation height not enough condition, terminal box can interfere with other components of equipment, and at this time motor as a whole cannot rotate, and the position of terminal box cannot be changed, need to remove other components of equipment and then install, it is very troublesome. SUMMARY

[0003] The utility model provides a kind of DC low voltage servo motor, at least can solve the problem indicated in background art.

[0004] A kind of DC low voltage servo motor, including motor main body and the control part connected in the rear end of motor main body;

[0005] Motor main body includes motor shell and the stator, rotor and motor shaft installed in motor shell;

[0006] Control part includes encoder, control shell covered on encoder and terminal box installed outside control shell, encoder is installed on motor shell, control shell includes connecting portion and rotating portion, terminal box is rotatably installed on rotating portion, connecting portion is fixedly connected with motor shell, rotating portion is rotatably arranged on connecting portion;

[0007] The motor shell is provided with through slot, so that motor power cord is inserted into control shell, motor power cord and encoder wiring are connected with the terminal of terminal box.

[0008] Preferably, the rotating portion is connected with annular connecting piece, and the connecting portion is provided with mounting slot matched with the annular connecting piece.

[0009] Preferably, two spool assemblies are installed in the control shell, motor power cord and encoder wiring are wound on the two spool assemblies respectively, and the control shell is further provided with transmission mechanism, when rotating portion rotates, spool assembly rotates with rotating portion.

[0010] Preferably, the transmission mechanism includes gear and gear ring, the gear is rotatably arranged in rotating portion, the gear ring is fixedly connected in connecting portion, and the gear is meshingly connected with the gear ring.

[0011] The gear is coaxial with one of the winding drum assemblies, and the winding drum assemblies are drivingly connected with the other winding drum assembly through a belt transmission mechanism.

[0012] When the rotating part rotates, the winding drum assemblies rotate so that the encoder wires or motor power supply wires on the winding drum assemblies are released.

[0013] Preferably, the winding drum assemblies comprise a bracket fixedly installed in the rotating part and a winding drum body rotatably arranged on the bracket, and the winding drum body comprises a thick part and a thin part, and the outer diameter of the thick part is larger than that of the thin part.

[0014] Preferably, the connecting piece has a limiting part extending in the radial direction to limit the axial movement of the connecting piece in the mounting groove.

[0015] Preferably, the connecting part is spliced by two symmetrical connecting blocks.

[0016] Compared with the prior art, the utility model has the beneficial effects that: the utility model can change the position of the junction box, has better adaptability to narrow installation space than the conventional servo motor, and can meet the diversified needs of customers. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of one of the perspectives of the utility model;

[0018] Figure 2 is a structural schematic view of another perspective of the utility model;

[0019] Figure 3 is a structural schematic view of the utility model after the position of the junction box is changed;

[0020] Figure 4 is a structural schematic view of the internal structure of the control shell of the utility model;

[0021] Figure 5 is a structural schematic view of the utility model in a partially exploded state.

[0022] BRIEF DESCRIPTION OF DRAWINGS:

[0023] 1-motor shell, 2-motor shaft, 3-control shell, 4-junction box, 5-encoder, 6-connecting part, 7-rotating part, 8-connecting piece, 9-mounting groove, 10-limiting part, 11-connecting block, 12-bracket, 13-winding drum body, 14-gear, 15-tooth ring, 16-motor power supply wire, 17-encoder wire. DETAILED DESCRIPTION

[0024] One specific embodiment of the utility model will be described in detail below with reference to the drawings, but it should be understood that the protection scope of the utility model is not limited by the specific embodiment.

[0025] As Figures 1 to 5 shown in the utility model embodiment provides a kind of DC low pressure servo motor, including motor main body and the control part being connected in the rear end of motor main body;

[0026] Motor main body includes motor shell 1 and the stator, rotor and motor shaft 2 installed in motor shell 1;

[0027] Control part includes encoder 5, cover encoder 5 on control shell 3 and install the terminal box 4 outside control shell 3, encoder 5 is installed on motor shell 1, control shell 3 includes connecting portion 6 and rotating portion 7, terminal box 4 is rotatably installed on rotating portion 7, connecting portion 6 is fixedly connected with motor shell 1, and rotating portion 7 is rotatably arranged on connecting portion 6;

[0028] Rotating portion 7 is connected with annular connecting piece 8, and mounting groove 9 matched with annular connecting piece 8 is formed in connecting portion 6, in addition, connecting piece 8 has a radially extending limiting portion 10, to limit the axial movement of connecting piece 8 in mounting groove 9, connecting portion 6 is spliced by two symmetrical connecting blocks 11, so as to facilitate the installation of connecting piece 8 into mounting groove 9, after installation, the fixation of two connecting blocks 11 is completed by welding, and finally gear ring 15 is welded on the inner side of connecting block 11;

[0029] Motor shell 1 is provided with through slot, so that motor power cord 16 extends into control shell 3, motor power cord 16 and encoder wiring 17 are connected with the terminal of terminal box 4, and the terminal is connected with power supply and driver through external cable, rotating portion 7 is provided with through slot, so that motor power cord 16 and encoder wiring 17 can enter terminal box 4;

[0030] Connecting portion 6 and rotating portion 7 are fixed by screw, when the position of terminal box 4 needs to be adjusted, screw is removed, rotating portion 7 is screwed, until terminal box 4 is rotated to the required position, and then locked by screw again;

[0031] Generally, corresponding threaded holes of different angles are preformed on the connecting plate, so as to be fixed;

[0032] To facilitate wiring, the junction box 4 of a conventional servo motor is located at the top. In a square installation space, if the height of the junction box 4 exceeds the length and width of the square installation space, it cannot be installed. Although the motor can be installed at an angle, it is difficult to effectively fix the motor, affecting the motor output. However, in this embodiment, the junction box 4 can be rotated 45° by turning the rotating part 7, which greatly reduces the space occupied by the motor and makes it easier to fix the motor. Although there is a minor problem of inconvenient wiring, it has better adaptability and can be used in narrow installation spaces to meet the diverse needs of customers.

[0033] To avoid the internal cables obstructing the rotation of the rotating part 7, two winding drum assemblies are installed inside the control housing 3. The winding drum assembly includes a bracket 12 fixedly installed inside the rotating part 7 and a winding drum body 13 rotatably mounted on the bracket 12. The motor power cable 16 and the encoder wiring 17 are respectively wound on the winding drum bodies 13 of the two winding drum assemblies. The control housing 3 is also equipped with a transmission mechanism. When the rotating part 7 rotates, the winding drum assembly rotates along with the rotating part 7.

[0034] Specifically, the transmission mechanism includes a gear 14 and a gear ring 15. The gear 14 is rotatably disposed in the rotating part 7, and the gear ring 15 is fixedly connected in the connecting part 6. The gears 14 mesh with each other.

[0035] Gear 14 is coaxial with one of the winding drum assemblies (gear 14 and winding drum body 13 are mounted on the same shaft), and the winding drum assembly is connected to the other winding drum assembly through a belt drive mechanism.

[0036] When the rotating part 7 rotates, the winding drum 13 rotates, so that the encoder wiring 17 or the motor power line 16 on the winding drum 13 is released, so as not to obstruct the rotation of the rotating part 7. When the junction box 4 is reset, the winding drum assembly is reset under the transmission of the gear 14, completing the winding of the cable and avoiding cable tangling.

[0037] It is worth noting that in the initial state, the rotating part 7 can only rotate in one direction. When it rotates in the opposite direction, it will damage the cable. Therefore, the rotation direction should be marked on the motor housing 1 or the control housing 3. When the junction box 4 starts to rotate from the initial position, the end of the winding drum 13 near the encoder 5 should be in the unwinding state. When connecting the wires and returning to the initial position, the end of the winding drum 13 near the encoder 5 should be in the winding state.

[0038] In addition, since the terminal box 4 rotates with the rotating part 7, when the winding drum 13 rotates, the one end of the encoder wire 17 close to the encoder 5 is the pay-off, and the one end of the encoder wire 17 close to the terminal of the terminal box 4 is the take-up, so a certain amount of space should be reserved in the terminal box 4, but too much space cannot be reserved, therefore the winding drum 13 comprises a thick part and a thin part, the outer diameter of the thick part is larger than the outer diameter of the thin part, the part of the encoder wire 17 / motor power wire 16 close to the encoder 5 is wound on the thick part, and the part of the encoder wire 17 / motor power wire 16 close to the terminal box 4 is wound on the thin part, when the rotating part 7 rotates, the pay-off is greater than the take-up, so that too much space does not need to be reserved in the terminal box 4.

[0039] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit and essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to embrace all changes falling within the meaning and range of equivalents of the claims. Any reference numerals in the claims should not be considered as limiting the claims to which they relate.

[0040] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A DC low voltage servo motor characterized in that, The motor body comprises a motor shell, a stator, a rotor and a motor shaft installed in the motor shell, and a control part connected to the rear end of the motor body; The motor body comprises a motor shell, a stator, a rotor and a motor shaft installed in the motor shell, and a control part connected to the rear end of the motor body; The control part comprises an encoder, a control shell covering the encoder, and a junction box installed outside the control shell, the encoder is installed on the motor shell, the control shell comprises a connecting part and a rotating part, the junction box is rotatably installed on the rotating part, the connecting part is fixedly connected with the motor shell, and the rotating part is rotatably arranged on the connecting part; A through slot is formed in the motor shell to allow the motor power line to extend into the control shell, and the motor power line and the encoder wire are connected with the terminal of the junction box.

2. A DC low voltage servo motor as claimed in claim 1, characterized in that The rotating part is connected with a ring-shaped connecting piece, and the connecting part is provided with a mounting slot matched with the ring-shaped connecting piece.

3. A DC low voltage servo motor as claimed in claim 1, wherein, Two winding drum assemblies are installed in the control shell, the motor power line and the encoder wire are wound on the two winding drum assemblies respectively, and a transmission mechanism is further installed in the control shell, when the rotating part rotates, the winding drum assemblies rotate with the rotating part.

4. A DC low voltage servo motor as claimed in claim 3, characterized in that The transmission mechanism comprises a gear and a tooth ring, the gear is rotatably arranged in the rotating part, and the tooth ring is fixedly connected in the connecting part, and the gear is meshingly connected with the tooth ring; The gear is coaxial with one of the winding drum assemblies, and the winding drum assembly is drivingly connected with the other winding drum assembly through a belt transmission mechanism; When the rotating part rotates, the winding drum assemblies rotate to release the motor power line or the encoder wire on the winding drum assemblies.

5. A DC low voltage servo motor as claimed in claim 3, wherein the rotor is made of a non-magnetic material. The winding drum assembly comprises a bracket fixedly installed in the rotating part and a winding drum body rotatably arranged on the bracket, the winding drum body comprises a thick part and a thin part, and the outer diameter of the thick part is larger than that of the thin part.

6. A DC low voltage servo motor as claimed in claim 2, wherein, The connecting piece has a limiting part extending in the radial direction to limit the axial movement of the connecting piece in the mounting slot.

7. A DC low voltage servo motor as claimed in claim 6, characterized in that The connecting part is spliced by two symmetrical connecting blocks.

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