Permanent magnet direct current speed reducing motor

Abstract

The utility model relates to an isolating switch part, in particular to a permanent magnet direct current speed reducing motor. The device comprises a motor and a reduction gearbox, the output end of the motor extends into the reduction gearbox and is sequentially meshed with a first-stage reduction gear, a second-stage reduction gear and a third-stage reduction gear, and the first-stage reduction gear, the second-stage reduction gear and the third-stage reduction gear are all in running fit with the reduction gearbox. The three-stage speed reducer is characterized in that a clutch is arranged in the speed reduction box, a clutch large gear and a clutch small gear are arranged on the clutch, and the clutch large gear is meshed with the output end of the three-stage speed reduction gear. An output shaft is arranged in the reduction gearbox, the output shaft is in running fit with the reduction gearbox, an output gear is fixedly connected to the output shaft, and the output gear is meshed with a clutch pinion of the clutch. The permanent-magnet direct-current speed-reducing motor not only can reduce the stress of the output end of the clutch and prolong the service life of the permanent-magnet direct-current speed-reducing motor, but also can improve the response speed of the clutch and timely control the isolating switch.

Description

TECHNICAL FIELD

[0001] The utility model relates to a disconnecting switch component, specifically a kind of permanent magnet DC speed reducer motor for driving disconnecting switch opening and closing, and it can also be applicable to the opening and closing of control grounding switch etc. BACKGROUND

[0002] Disconnecting switch is a kind of switch device mainly used for "isolating power supply, switching operation, to connect and cut off small current circuit", without arc extinguishing function. Breaking and closing are two basic operating actions of disconnecting switch, and both operating actions need to be realized by the operation of permanent magnet DC speed reducer motor.

[0003] The conventional permanent magnet DC speed reducer motor for disconnecting switch includes motor and reduction gearbox, the output end of motor is inserted into reduction gearbox, and is engaged with multiple stages of reduction gears in turn, the last stage of reduction gear is engaged with the input end gear of clutch, and the output end of clutch is used to control the breaking and closing of disconnecting switch. Although this kind of permanent magnet DC speed reducer motor can well control the breaking and closing action of disconnecting switch, the output end of clutch directly controls disconnecting switch, so that the stress of output end of clutch is large, and it is easy to be damaged, which affects the service life of permanent magnet DC speed reducer motor. Moreover, the output end of last stage of reduction gear is the end with the slowest speed, and the clutch is arranged on the end, which affects the response speed of clutch, and cannot achieve timely control of disconnecting switch. SUMMARY

[0004] The utility model aims at solving the deficiency of prior art, and provides a kind of permanent magnet DC speed reducer motor, which not only can reduce the stress of clutch output end, prolong the service life of permanent magnet DC speed reducer motor, but also can improve the response speed of clutch, and achieve timely control of disconnecting switch.

[0005] To solve the above problems, the following technical solutions are adopted:

[0006] The permanent magnet DC speed reducer motor of the utility model includes motor and reduction gearbox, the output end of motor is inserted into reduction gearbox, and is engaged with first stage of reduction gear, second stage of reduction gear and third stage of reduction gear in turn, and the first stage of reduction gear, second stage of reduction gear and third stage of reduction gear are all in rotary cooperation with reduction gearbox. Its feature is that there is clutch in reduction gearbox, and there are clutch large gear and clutch small gear on the clutch, and clutch large gear is engaged with the output end of third stage of reduction gear. There is output shaft in reduction gearbox, and the output shaft is in rotary cooperation with reduction gearbox, and output shaft is fixedly connected with output gear on it, and the output gear is engaged with clutch small gear of clutch.

[0007] Further, the clutch comprises a rotating shaft, the clutch large gear is sleeved on one end of the rotating shaft and fixedly connected with the rotating shaft, the clutch small gear is sleeved on the other end of the rotating shaft and rotationally connected with the rotating shaft, and the clutch plate is sleeved on the segment of the rotating shaft between the clutch large gear and the clutch small gear and rotationally connected with the rotating shaft. The opposite surfaces of the clutch large gear and the clutch plate are uniformly provided with open V-shaped grooves, and the V-shaped grooves are provided with steel balls.

[0008] The one end of the rotating shaft corresponding to the clutch large gear is rotationally connected with the reduction box through the cover plate output bearing.

[0009] The one end of the rotating shaft corresponding to the clutch small gear is sleeved with a shaft sleeve, and the shaft sleeve is fixedly connected with the rotating shaft through the pin column. The outer side of the shaft sleeve is rotationally connected with the reduction box through the box output bearing.

[0010] In the above scheme, the diameter of the output end of the motor is smaller than the diameter of the input end large gear of the primary reduction gear, and the two are engaged. The diameter of the output end small gear of the primary reduction gear is smaller than the diameter of the input end large gear of the secondary reduction gear, and the two are engaged. The diameter of the output end small gear of the secondary reduction gear is smaller than the diameter of the input end large gear of the tertiary reduction gear, and the two are engaged. The diameter of the output end small gear of the tertiary reduction gear is smaller than the diameter of the clutch large gear, and the two are engaged.

[0011] The two ends of the primary reduction gear, the two ends of the secondary reduction gear, the two ends of the tertiary reduction gear and the two ends of the output shaft are rotationally connected with the reduction box through bearings.

[0012] The above scheme has the following advantages:

[0013] The utility model discloses a permanent magnet DC speed reducing motor sets up the clutch in the reduction gearbox, and the clutch has the clutch big gear and clutch pinion, and the clutch big gear is engaged with the output end of three -stage reduction gear, and the reduction gearbox has the output shaft, and the output shaft is rotatably connected between the reduction gearbox, and the output shaft is fixedly connected with the output gear, and the output gear is engaged with the clutch pinion of clutch. Therefore, the output shaft of the permanent magnet DC speed reducing motor of the utility model is located in the next stage of clutch, and the clutch pinion of clutch is engaged with the output gear of output shaft. That is to say, the output stage of the permanent magnet DC speed reducing motor for controlling the disconnecting switch is the output shaft, and the force of the output end of the clutch as the penultimate stage is obviously less than the output stage, which greatly reduces the force of the output end of clutch, makes it not easy to damage, and can prolong the service life of the permanent magnet DC speed reducing motor. At the same time, the clutch is arranged on the penultimate stage of reduction gearbox, compared with being arranged on the last stage, can greatly improve the response speed of clutch, thereby can achieve the timely control of disconnecting switch.

[0014] Further, since the permanent magnet DC speed reducing motor has the requirement that the output shaft cannot protrude outside the reduction gearbox, if the clutch is arranged on the last stage, the pin column for fixing the output shaft and the shaft sleeve must be arranged in the reduction gearbox, and when the output shaft rotates, the pin column will cause great wear to the bearing or reduction gearbox under the influence of axial force and radial force. The permanent magnet DC speed reducing motor of the utility model sets up the clutch on the penultimate stage, and the rotating shaft does not need to meet the requirement that it cannot protrude outside the reduction gearbox, so that the installation position of the pin column for connecting the shaft sleeve and the rotating shaft can be arranged outside the reduction gearbox, thereby avoiding the wear of the pin column to the bearing or reduction gearbox, and further prolonging the service life of the permanent magnet DC speed reducing motor. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the permanent magnet DC speed reducing motor structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0016] The utility model will be further explained in detail in combination with the drawings.

[0017] As Figure 1The utility model discloses a permanent magnet DC speed reducing motor, including motor 1 and reduction gearbox 2, the output of motor 1 is in reduction gearbox 2 and is in turn engaged with primary reduction gear 3, secondary reduction gear 4, tertiary reduction gear 5, the primary reduction gear 3, secondary reduction gear 4 and tertiary reduction gear 5 are all with reduction gearbox 2 and show rotation cooperation.

[0018] The output of motor 1 is processed with tooth, and the diameter is less than the input big gear diameter of primary reduction gear 3, and the both engagement. The output pinion diameter of primary reduction gear 3 is less than the input big gear diameter of secondary reduction gear 4, and the both engagement. The output pinion diameter of secondary reduction gear 4 is less than the input big gear diameter of tertiary reduction gear 5, and the both engagement. The output pinion diameter of tertiary reduction gear 5 is less than the diameter of clutch big gear 6, and the both engagement.

[0019] The both ends of primary reduction gear 3, the both ends of secondary reduction gear 4, the both ends of tertiary reduction gear 5 and the both ends of output shaft 10 are all through bearing and show rotation cooperation with reduction gearbox 2.

[0020] The clutch includes rotating shaft 7, the clutch big gear 6 is sleeved on one end of the rotating shaft 7 and is fixedly connected, and the clutch small gear 13 is sleeved on the other end of the rotating shaft 7 and is rotationally connected. The clutch piece 12 is sleeved on the segment of the rotating shaft 7 between the clutch big gear 6 and the clutch small gear 13, and the clutch piece 12 is rotationally connected with the rotating shaft 7. The opposite surfaces of the clutch big gear 6 and the clutch piece 12 are uniformly provided with V-shaped grooves with openings, and each pair of opposite V-shaped grooves is provided with a steel ball 9. The outer periphery of the clutch piece 12 is provided with an annular groove, and the annular groove is provided with an elastic clamp 19, and the tail end of the elastic clamp 19 is fixedly connected with the reduction gearbox 2. The opposite surfaces of the clutch small gear 13 and the clutch piece 12 are provided with annular grooves at the center, and the segment of the rotating shaft 7 between the bottoms of the two annular grooves is sleeved with a compression spring 17. The opposite surfaces of the clutch small gear 13 and the clutch piece 12 are uniformly provided with matching convex and concave teeth 18 outside the annular grooves. One end of the corresponding rotating shaft 7 of the clutch big gear 6 is rotationally connected with the reduction gearbox 2 through a cover plate output bearing 8. One end of the corresponding rotating shaft 7 of the clutch small gear 13 is sleeved with a shaft sleeve 14, and the shaft sleeve 14 is fixedly connected with the rotating shaft 7 through a pin column 15. The outer side of the shaft sleeve 14 is rotationally connected with the reduction gearbox 2 through a box output bearing 16.

[0021] The output shaft 10 of the permanent magnet DC speed reducing motor is located at the next stage of the clutch, and the clutch small gear 13 is engaged with the output gear 11 of the output shaft 10. That is, the output stage of the permanent magnet DC speed reducing motor for controlling the isolating switch is the output shaft 10, and the force on the output end of the clutch as the penultimate stage is obviously smaller than that of the output stage, which greatly reduces the force on the output end of the clutch, so that the clutch is not easy to be damaged, and the service life of the permanent magnet DC speed reducing motor can be prolonged. At the same time, the clutch is arranged at the penultimate stage of the speed reducing box 2, and compared with being arranged at the last stage, the response speed of the clutch can be greatly improved, so that the isolating switch can be controlled in time.

[0022] In addition, since the permanent magnet DC speed reducing motor has the requirement that the output shaft 10 cannot protrude outside the speed reducing box 2, if the clutch is arranged at the last stage, the pin column 15 for fixing the output shaft 10 and the shaft sleeve 14 must be arranged inside the speed reducing box 2, and when the output shaft 10 rotates, the pin column 15 will cause great wear of the bearing or the speed reducing box 2 due to the axial force and the radial force. The permanent magnet DC speed reducing motor of the utility model sets the clutch at the penultimate stage, so the rotating shaft 7 does not need to meet the requirement that it cannot protrude outside the speed reducing box 2, so the installation position of the pin column 15 for connecting the shaft sleeve 14 and the rotating shaft 7 can be arranged outside the speed reducing box 2, so that the wear of the bearing or the speed reducing box 2 caused by the pin column 15 is avoided, and the service life of the permanent magnet DC speed reducing motor can be further prolonged.

Claims

1. A permanent magnet DC geared motor, comprising a motor (1) and a gearbox (2), wherein the output end of the motor (1) extends into the gearbox (2) and is sequentially meshed with a first-stage reduction gear (3), a second-stage reduction gear (4), and a third-stage reduction gear (5), wherein the first-stage reduction gear (3), the second-stage reduction gear (4), and the third-stage reduction gear (5) are all in rotational engagement with the gearbox (2); characterized in that The gearbox (2) contains a clutch with a clutch gear (6) and a clutch pinion (13). The clutch gear (6) meshes with the output end of the three-stage reduction gear (5). The gearbox (2) contains an output shaft (10) that is rotatably connected to the gearbox (2). An output gear (11) is fixedly connected to the output shaft (10) and meshes with the clutch pinion (13).

2. The permanent magnet DC geared motor as described in claim 1, characterized in that... The clutch includes a rotating shaft (7), a large clutch gear (6) fitted onto one end of the rotating shaft (7) and the two are fixedly connected, and a small clutch gear (13) fitted onto the other end of the rotating shaft (7) and the two are in rotational engagement; a clutch plate (12) is fitted onto the section of the rotating shaft (7) between the large clutch gear (6) and the small clutch gear (13), and the clutch plate (12) will be in rotational engagement with the rotating shaft (7); the opposing surfaces of the large clutch gear (6) and the clutch plate (12) are evenly distributed with opposing V-shaped grooves, which are arranged in pairs. Each of the V-shaped grooves contains a steel ball (9); the outer periphery of the clutch plate (12) has an annular groove, and the annular groove contains an elastic clip (19), the tail end of the elastic clip (19) is fixedly connected to the gearbox (2); the center of the opposite face of the clutch pinion (13) and the clutch plate (12) has an annular groove, and the section of the shaft (7) between the bottom of the two annular grooves is fitted with a compression spring (17); the opposite face of the clutch pinion (13) and the clutch plate (12) has matching concave and convex teeth (18) evenly distributed on the outer periphery of the annular groove.

3. The permanent magnet DC geared motor as described in claim 2, characterized in that... One end of the shaft (7) corresponding to the clutch gear (6) is in rotational engagement with the gearbox (2) through the cover plate output bearing (8).

4. The permanent magnet DC geared motor as described in claim 2, characterized in that... The shaft (7) corresponding to the clutch pinion (13) is fitted with a bushing (14) at one end. The bushing (14) and the shaft (7) are fixedly connected by a pin (15). The outer side of the bushing (14) is rotatedly connected to the gearbox (2) through the gearbox output bearing (16).

5. The permanent magnet DC geared motor as described in any one of claims 1 to 4, characterized in that... The output end diameter of the motor (1) is smaller than the input end large gear diameter of the first-stage reduction gear (3), and the two mesh with each other; the output end small gear diameter of the first-stage reduction gear (3) is smaller than the input end large gear diameter of the second-stage reduction gear (4), and the two mesh with each other; the output end small gear diameter of the second-stage reduction gear (4) is smaller than the input end large gear diameter of the third-stage reduction gear (5), and the two mesh with each other; the output end small gear diameter of the third-stage reduction gear (5) is smaller than the clutch large gear (6), and the two mesh with each other.

6. The permanent magnet DC geared motor as described in any one of claims 1 to 4, characterized in that... Both ends of the first-stage reduction gear (3), both ends of the second-stage reduction gear (4), both ends of the third-stage reduction gear (5), and both ends of the output shaft (10) are rotatedly connected to the reduction gearbox (2) through bearings.

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