A low voltage high torque motor

Abstract

The present invention provides a low-voltage, high-torque motor, comprising a shell with a housing space provided therein; a ring gear fixedly installed inside the shell; a motor body rotatably installed inside the shell, the motor body being located on one side of the inner ring of the ring gear; a planetary gear assembly meshing with a sun gear for transmission is installed on the motor body, the planetary gear assembly meshing with the ring gear for transmission; an output shaft fixedly installed at the end of a casing of the motor body, the output shaft rotatably passes through the shell and extends to the outside; a locking structure is provided inside the shell for preventing the meshing of the planetary gear assembly with the ring gear to achieve locking; the structure is novel, and can prevent the gears from rotating by preventing the meshing transmission between the gear assemblies, thereby providing a stable locking effect.

Description

Technical Field

[0001] The present invention relates to the field of electric motors, and more specifically, to a low-voltage and high-torque electric motor. Background Art

[0002] DC high torque motors are widely used in the fields of automatic telescopic doors, rail-type gates, slow electric vehicles, etc.; most of the current DC high torque motors use multi-stage gear transmission to achieve the effect of deceleration and torque increase, so as to provide sufficient power to the outside; however, the current motors, especially for planetary gear motors, mainly have the following two ways to achieve the self-locking function: one is to use the ratchet pawl to achieve the one-way self-locking function, and the other is to use the brake structure for locking;

[0003] The former can only be locked in one direction, which means that the motor can only achieve one-way drive and is not suitable for use scenarios with forward and reverse rotation requirements. The force is more concentrated on the pawl, and the locking force is poor. The latter has a complex brake structure, occupies a large space, is not convenient for the layout and design of the overall structure, and most of them achieve locking through friction, which is prone to slipping and loosening, and the locking effect needs to be improved. Summary of the invention

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to propose a low-voltage high-torque motor with a novel structure, which can provide a stable locking effect by hindering the meshing transmission between gear components so that the gears cannot rotate.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention provides a low-voltage, high-torque motor, comprising a shell with an accommodating space therein; a ring gear is fixedly installed inside the shell; a motor body is rotatably installed inside the shell, and the motor body is located on one side of the inner ring of the ring gear; a planetary gear assembly meshing with a sun gear is installed on the motor body, and the planetary gear assembly meshes with the ring gear for transmission; an output shaft is fixedly installed at the end of a casing of the motor body, and the output shaft rotatably penetrates the shell and extends to the outside; a locking structure is provided inside the shell, which is used to prevent the meshing of the planetary gear assembly with the ring gear to achieve locking.

[0007] In a preferred technical solution of the present invention, the locking structure includes a driving member and a locking assembly; a plurality of locking tongues are provided on the locking assembly, and the positions of the locking tongues correspond to the positions of the tooth grooves of the ring gear; the locking assembly is arranged on one side of the ring gear, and the driving member is used to drive the locking assembly to move along the axial direction so that the locking tongues enter and exit the tooth grooves of the ring gear; when the locking tongues enter the tooth grooves, the engagement of the planetary gear assembly with the ring gear is hindered, so that the planetary gear assembly cannot rotate, thereby achieving locking.

[0008] In a preferred technical solution of the present invention, the locking assembly includes a supporting ring, a locking tongue, a first spring, and a first retaining spring; the locking tongue includes a first guide rod and an insert fixedly arranged at the end of the first guide rod; a plurality of first guide holes are provided on the supporting ring, the first guide rod is passed through the first guide holes, a first retaining spring is installed at the end of the first guide rod, and the first retaining spring is located on the side of the supporting ring away from the insert; the first spring is sleeved on the first guide rod, the first spring is clamped between the insert and the supporting ring, and the first spring provides a pushing elastic force for the locking tongue; when the driving member pushes the locking assembly, the insert can enter the corresponding vacant tooth groove to achieve space blocking; when the movement of the insert is blocked, the corresponding locking tongue compresses the first spring to achieve retraction.

[0009] In a preferred technical solution of the present invention, the shape of the insert block matches the shape of the tooth groove; the first guide rod is a square bar-shaped structure, and the shape of the first guide hole matches the shape of the first guide rod.

[0010] In a preferred technical solution of the present invention, a plurality of second guide rods are fixedly provided on the wall surface of the ring gear close to the locking assembly, a second spring is sleeved on the second guide rod, and a second retaining spring is installed on the end of the second guide rod; a plurality of second guide holes are correspondingly provided on the support ring, the second guide rod passes through the support ring through the second guide holes, the second retaining spring is located on the side of the support ring away from the ring gear, and the second spring is clamped between the support ring and the ring gear; the second spring provides a thrust to the locking assembly away from the ring gear; when the driving member is not started, the second spring pushes the locking assembly outward to disengage the insert from the tooth groove; when the driving member is started, it pushes the locking assembly, compresses the second spring, and causes the insert to enter the corresponding vacant tooth groove.

[0011] In a preferred technical solution of the present invention, when the driving member is not started, the second spring pushes the locking assembly outward until the insert is disengaged from the tooth groove, and the distance between the end face of the insert and the wall surface of the ring gear is 0.5 to 1.5 mm.

[0012] In a preferred technical solution of the present invention, the driving part includes multiple electromagnets and multiple magnet blocks; the magnet block is fixedly mounted on the wall surface of the support ring away from the lock tongue; the electromagnet is fixedly mounted on the outer casing by bolts, and the position of the electromagnet corresponds to the position of the magnet block; when the electromagnet is energized, the magnet block is repelled and pushed, causing the locking assembly to move toward the direction of the ring gear.

[0013] In a preferred technical solution of the present invention, when the electromagnet is not powered, the distance between the end face of the electromagnet and the magnet block is 0.5 to 1.5 mm.

[0014] In a preferred technical solution of the present invention, the planetary gear assembly includes a first gear member, a second gear member, and a third gear member; the first gear member includes a first gear and a second gear fixed on a first support shaft, and the diameter of the first gear is greater than the diameter of the second gear; the second gear member includes a third gear and a fourth gear fixed on the second support shaft, and the diameter of the third gear is greater than the diameter of the fourth gear; the third gear member includes a fifth gear fixed on the third support shaft; the first gear meshes with the sun gear for transmission, the second gear meshes with the third gear for transmission, the fourth gear meshes with the fifth gear for transmission, and the fifth gear meshes with the ring gear for transmission.

[0015] The beneficial effects of the present invention are:

[0016] The present invention provides a low-voltage, high-torque motor with a novel structure, comprising a shell, a ring gear fixedly installed inside the shell; a motor body, rotatably installed inside the shell, a planetary gear assembly meshing with the sun gear for transmission is installed on the motor body, and the planetary gear assembly meshes with the ring gear for transmission; an output shaft, fixedly installed at the end of the casing of the motor body, the output shaft rotatably passes through the shell and extends to the outside; a locking structure is provided inside the shell, which is used to prevent the meshing of the planetary gear assembly with the ring gear, so that the gear cannot rotate, which means that the motor body and the output shaft cannot rotate, thereby providing a stable locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a low-voltage high-torque motor provided in a specific embodiment of the present invention;

[0018] Figure 2 is a cross-sectional view of a low-voltage high-torque motor provided in a specific embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the internal structure of a low-voltage high-torque motor provided in a specific embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of a three-dimensional unfolded structure of a low-voltage high-torque motor provided in a specific embodiment of the present invention from a first viewing angle;

[0021] Figure 5 is a schematic diagram of a three-dimensional unfolded structure of a low-voltage high-torque motor provided in a specific embodiment of the present invention from a second viewing angle;

[0022] Figure 6 is a schematic diagram of the three-dimensional structure of a locking assembly provided in a specific embodiment of the present invention from a first viewing angle;

[0023] Figure 7 is a schematic diagram of a three-dimensional structure of a locking assembly provided in a specific embodiment of the present invention from a second viewing angle;

[0024] Figure 8 is a schematic diagram of a three-dimensional unfolded structure of a locking assembly provided in a specific embodiment of the present invention;

[0025] Fig. 9 is a schematic diagram of the three-dimensional structure of a lock tongue provided in a specific embodiment of the present invention;

[0026] Fig.10 is a schematic diagram of the three-dimensional structure of a ring gear provided in a specific embodiment of the present invention;

[0027] Fig.11 is a schematic diagram of a three-dimensional structure of a planetary gear assembly from a first perspective provided in a specific embodiment of the present invention;

[0028] Fig.12 It is a schematic diagram of the three-dimensional structure of the planetary gear assembly provided in a specific embodiment of the present invention from a second viewing angle.

[0029] In the figure:

[0030] 100, housing; 200, ring gear; 210, tooth groove; 220, second guide rod; 300, motor body; 310, sun gear; 320, planetary gear assembly; 321, first gear; 322, second gear; 323, third gear; 324, fourth gear; 325, fifth gear; 330, housing; 400, output shaft; 500, locking structure; 510, driving member; 511, electromagnet; 512, magnet block; 520, locking assembly; 521, locking tongue; 5211, first guide rod; 5212, insert; 522, support ring; 5221, first guide hole; 5222, second guide hole; 523, first spring; 524, first retaining spring; 600, second spring; 700, second retaining spring. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0032] like Figures 1 to 5As shown, a specific embodiment of the present invention discloses a low-voltage high-torque motor, including a housing 100, with a receiving space provided therein; a ring gear 200 is fixedly installed inside the housing 100; a motor body 300 is rotatably installed inside the housing 100, and the motor body 300 is located on the inner ring side of the ring gear 200; a planetary gear assembly 320 meshing with a sun gear 310 is installed on the motor body 300, and the planetary gear assembly 320 meshes with the ring gear 200 for transmission; an output shaft 400 is fixedly installed at the end of a housing 330 of the motor body 300, and the output shaft 400 rotates through the housing 100 and extends to the outside; a locking structure 500 is provided inside the housing 100, which is used to prevent the meshing of the planetary gear assembly 320 with the ring gear 200 to achieve locking;

[0033] The above-mentioned low-voltage and high-torque motor has a novel structure and adopts a planetary gear assembly for transmission to achieve the effect of deceleration and torque increase, and provide sufficient power to the outside. A locking structure is provided inside the casing to prevent the engagement of the planetary gear assembly with the ring gear, so that the gear cannot rotate, which means that the motor body and the output shaft cannot rotate, thereby providing a stable locking effect.

[0034] Among them, the motor body includes a casing, which is rotatably installed inside the outer shell through a bearing. The casing is equipped with components such as a stator coil, a magnet rotor, a transmission shaft, a transmission gear, and bearings. The above components are commonly used structural devices in the motor field, and the specific structure will not be repeated here.

[0035] Furthermore, the outer shell includes a shell body and a shell cover fixedly connected by bolts, the inner wall of the shell body is fixedly provided with a plurality of first support bars, the end of the first support bar is provided with a first threaded hole, the shell cover covers the end of the shell body and is fixed to the first support bar by screws; the inner wall of the shell body is fixedly provided with a plurality of second support bars, the length of the second support bar is less than the length of the first support bar, the end of the second support bar is provided with a second threaded hole, the ring gear is correspondingly provided with a plurality of countersunk holes, and the ring gear is fixed to the second support bar by a plurality of screws; and the outer wall of the ring gear is correspondingly provided with a plurality of first clamping grooves, the shape of the first clamping grooves is adapted to the shape of the first support bar, the first clamping grooves correspond to the position of the first support bar, the ring gear is clamped on the outside of the plurality of first support bars, further strengthening the fixation of the ring gear and preventing the ring gear from loosening or deviating.

[0036] Furthermore, if Figures 2 to 10As shown, the locking structure 500 includes a driving member 510 and a locking assembly 520; a plurality of locking tongues 521 are provided on the locking assembly 520, and the positions of the locking tongues 521 correspond to the positions of the tooth grooves 210 of the ring gear 200; the locking assembly 520 is arranged on one side of the ring gear 200, and the driving member is used to drive the locking assembly 520 to move along the axial direction, so that the locking tongues 521 enter and exit the tooth grooves 210 of the ring gear 200; when the locking tongues enter the tooth grooves, the meshing of the planetary gear assembly and the ring gear is blocked, so that the planetary gear assembly cannot rotate, thereby achieving locking; the locking tongues are inserted into the tooth grooves along the axial direction, and the meshing of the planetary gear assembly and the ring gear is in the circumferential cutting direction, and the rotation of the planetary gear assembly to the position of the locking tongues will not cause the locking tongues to deviate, and the locking tongues can provide effective space, so that the planetary gear assembly cannot rotate along the ring gear, thereby forming a stable locking effect.

[0037] Furthermore, if Figure 8 , Fig. 9 As shown, the locking assembly 520 includes a supporting ring 522, a locking tongue 521, a first spring 523, and a first retaining spring 524; the locking tongue 521 includes a first guide rod 5211 and an insert 5212 fixedly arranged at the end of the first guide rod 5211; a plurality of first guide holes 5221 are arranged on the supporting ring 522, the first guide rod is penetrated at the first guide hole, and a first retaining spring 524 is installed at the end of the first guide rod 5211, and the first retaining spring is located on the side of the supporting ring away from the insert; the first spring 523 is sleeved on the first guide rod 5211, and the first spring 523 is clamped between the insert 5212 and the supporting ring 522, the first spring provides the locking tongue with a pushing elastic force; when the driving member pushes the locking assembly, the insert can enter the corresponding vacant tooth groove to achieve space blocking; when the movement of the insert is blocked, the corresponding locking tongue compresses the first spring to achieve retraction; the above structural design allows the locking tongue to be individually retracted at the meshing part of the planetary gear assembly and the ring gear, while the locking tongues at other parts are normally inserted into the tooth groove to form a space, effectively preventing the problem of motion interference; the overall assembly structure is convenient for the processing and production of various structural components, and also convenient for the subsequent disassembly, assembly and replacement of components.

[0038] Furthermore, if Fig. 9 As shown, the shape of the insert 5212 is adapted to the shape of the tooth groove 210; the first guide rod 5211 is a square bar-shaped structure, and the shape of the first guide hole 5221 is adapted to the shape of the first guide rod 5211; the use of a structure adapted to the shape of the tooth groove can provide a larger contact area and better force transmission, thereby providing a stable locking effect; it should be noted that the shape of the insert can also be a column or square bar or rib-shaped structure, which can enter the tooth groove to occupy a place, and can also achieve the effect of hindering the meshing rotation, thereby completing the locking, but it should be pointed out that the insert is preferably a structure adapted to the shape of the tooth groove.

[0039] Furthermore, the edges of the insertion end of the insert are chamfered, which can facilitate the insert to be smoothly inserted into the corresponding tooth groove and provide the required position.

[0040] Furthermore, if Figure 4 , Fig.10 As shown, a plurality of second guide rods 220 are fixedly provided on the wall surface of the ring gear 200 close to the locking assembly 520, a second spring 600 is sleeved on the second guide rod 220, and a second retaining spring 700 is installed on the end of the second guide rod 220; a plurality of second guide holes 5222 are correspondingly provided on the support ring 522, the second guide rod 220 passes through the support ring 522 through the second guide holes 5222, the second retaining spring 700 is located on the side of the support ring 522 away from the ring gear 200, and the second spring 600 is clamped on the support ring 522. and the ring gear 200; the second spring provides a thrust to the locking assembly away from the ring gear; when the driving member is not started, the second spring pushes the locking assembly outward to disengage the insert from the tooth groove; when the driving member is started, the locking assembly is pushed and the second spring is compressed to allow the insert to enter the corresponding vacant tooth groove; the movement of the locking assembly is further limited by setting a second guide rod, and the second guide rod is provided with a second spring to provide a reset elastic force for the locking assembly, so that the insert can smoothly disengage from the tooth groove and maintain the unlocked state.

[0041] Furthermore, multiple second guide rods are distributed in a circular array around the axis of the ring gear, and each second guide rod is provided with a second spring. The multiple second springs provide sufficient supporting force for the locking assembly, so that the insert can smoothly disengage from the tooth groove to achieve the unlocking effect; and the multiple second springs form a circular array and are evenly distributed to provide smooth force to prevent the support ring from running off track.

[0042] Furthermore, a plurality of guide slots are provided on the edge of the support ring corresponding to the first support bar, and the support ring moves along the first support bar to achieve further limitation, so that the insert can accurately enter the corresponding tooth groove; and the force of the support ring can also be transferred to the outer shell to further enhance the locking effect.

[0043] Furthermore, when the driving member is not started, the second spring pushes the locking assembly outward until the block is disengaged from the tooth groove, and the distance between the end face of the block and the wall of the ring gear is 0.5 to 1.5 mm, which can prevent the block from moving away from the tooth groove and shorten the moving stroke so that the subsequent block can be smoothly inserted into the tooth groove; on the other hand, it can make the overall structure more compact and reduce space occupancy.

[0044] Furthermore, if Figure 2 , Figure 4 , Figure 6As shown, the driving member 510 includes a plurality of electromagnets 511 and a plurality of magnet blocks 512; the magnet block 512 is fixedly mounted on the wall surface of the support ring 522 away from the lock tongue 521; the electromagnet 511 is fixedly mounted on the housing 100 by bolts, and the position of the electromagnet 511 corresponds to the position of the magnet block 512; when the electromagnet is energized, the magnet block is repelled and pushed, so that the locking assembly moves toward the direction of the ring gear; after the electromagnet is energized, it generates the same magnetism as the magnet block, and the repulsive force between the electromagnet and the magnet block is sufficient to overcome the elastic force of the second spring and the first spring, so that the locking assembly moves toward the direction of the ring gear, and the insert block enters the card slot, completing and maintaining the desired locking effect.

[0045] Furthermore, a plurality of convex rings are fixedly provided on the wall surface of the support ring close to the electromagnet, and the plurality of convex rings are distributed in a circular array around the axis of the support ring, and the magnet block is placed in the convex ring and fixed by bonding; the number of the electromagnets is the same as the number of the magnet blocks, and the positions correspond to each other, so as to realize effective pushing.

[0046] Furthermore, when the electromagnet is not powered, the distance between the end face of the electromagnet and the magnet block is 0.5-1.5 mm, so that the electromagnet is close to the magnet block. After the electromagnet is powered, it provides sufficient repulsive force to allow the insert to be smoothly inserted into the tooth slot.

[0047] Furthermore, if Figure 3 , Fig.11 , Fig.12 As shown, the planetary gear assembly 320 includes a first gear member, a second gear member, and a third gear member; the first gear member includes a first gear 321 and a second gear 322 fixed on the first support shaft, and the diameter of the first gear is greater than the diameter of the second gear; the second gear member includes a third gear 323 and a fourth gear 324 fixed on the second support shaft, and the diameter of the third gear is greater than the diameter of the fourth gear; the third gear member includes a fifth gear 325 fixed on the third support shaft; the first gear 321 is meshed with the sun gear 310 for transmission, the second gear 322 is meshed with the third gear 323 for transmission, the fourth gear 324 is meshed with the fifth gear 325 for transmission, and the fifth gear 325 is meshed with the ring gear 200 for transmission; the first support shaft, the second support shaft, and the third support shaft are installed on the casing through bearings, wherein one side of the fifth gear passes through the outside of the casing and meshes with the ring gear for transmission; through multi-stage meshing transmission, the torque is effectively increased to provide sufficient power to the outside.

[0048] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A low-voltage high-torque motor, comprising a housing with a receiving space therein; a ring gear fixedly mounted inside the housing; a motor body rotatably mounted inside the housing, the motor body being located on one side of the inner ring of the ring gear; a planetary gear assembly meshing with a sun gear for transmission is mounted on the motor body, the planetary gear assembly meshing with the ring gear for transmission; the characteristics are: A locking structure is provided inside the housing to prevent the planetary gear assembly from meshing with the ring gear to achieve locking; The locking structure includes a driving member and a locking assembly; The locking assembly is provided with a plurality of locking tongues, and the positions of the locking tongues correspond to the positions of the tooth grooves of the ring gear; The locking assembly is arranged on one side of the ring gear, and the driving member is used to drive the locking assembly to move along the axial direction so that the locking tongue enters and exits the tooth groove of the ring gear; When the lock tongue enters the tooth groove, it blocks the meshing of the planetary gear assembly and the ring gear, making the planetary gear assembly unable to rotate, thus achieving locking; The locking assembly includes a supporting ring, a locking tongue, a first spring, and a first retaining spring; The locking tongue comprises a first guide rod and an insert fixedly arranged at the end of the first guide rod; The support ring is provided with a plurality of first guide holes, the first guide rod is passed through the first guide hole, the end of the first guide rod is installed with a first retaining spring, and the first retaining spring is located on the side of the support ring away from the insert; the first spring is sleeved on the first guide rod, the first spring is clamped between the insert and the support ring, and the first spring provides a pushing elastic force for the lock tongue; When the driving member pushes the locking assembly, the insert can enter the corresponding vacant tooth groove to achieve blocking; when the movement of the insert is blocked, the corresponding lock tongue compresses the first spring to achieve retraction.

2. A low voltage high torque motor according to claim 1, characterized in that: The shape of the insert is adapted to the shape of the tooth groove; The first guide rod is a square bar structure, and the shape of the first guide hole matches the shape of the first guide rod.

3. A low voltage high torque motor according to claim 2, characterized in that: A plurality of second guide rods are fixedly provided on the wall surface of the ring gear close to the locking assembly, a second spring is sleeved on the second guide rods, and a second clamping spring is installed at the end of the second guide rods; A plurality of second guide holes are correspondingly provided on the support ring, and the second guide rod passes through the support ring through the second guide holes. The second clamping spring is located on a side of the support ring away from the ring gear, and the second spring is clamped between the support ring and the ring gear. A second spring provides a urging force to the locking assembly away from the ring gear; When the driving member is not activated, the second spring pushes the locking assembly outward to disengage the insert from the tooth groove; When the driving member is started, the locking assembly is pushed up, the second spring is compressed, and the insert block enters the corresponding vacant tooth groove.

4. A low voltage high torque motor according to claim 3, characterized in that: When the driving member is not started, the second spring pushes the locking assembly outward until the insert is disengaged from the tooth groove, and the distance between the end face of the insert and the wall surface of the ring gear is 0.5-1.5 mm.

5. A low voltage high torque motor according to claim 4, characterized in that: The driving member includes a plurality of electromagnets and a plurality of magnet blocks; The magnet block is fixedly mounted on the wall surface of the support ring away from the lock tongue; The electromagnet is fixed on the housing by bolts, and the position of the electromagnet corresponds to the position of the magnet block; When the electromagnet is energized, it repels and pushes the magnet block, causing the locking assembly to move toward the ring gear.

6. A low voltage high torque motor according to claim 5, characterized in that: When the electromagnet is not powered, the distance between the end face of the electromagnet and the magnet block is 0.5~1.5mm.

7. A low voltage high torque motor according to claim 1, characterized in that: The planetary gear assembly includes a first gear member, a second gear member, and a third gear member; The first gear member comprises a first gear and a second gear fixed on the first supporting shaft, wherein the diameter of the first gear is greater than the diameter of the second gear; The second gear member includes a third gear and a fourth gear fixed on the second supporting shaft, and the diameter of the third gear is greater than the diameter of the fourth gear; The third gear member includes a fifth gear fixed on the third support shaft; The first gear is meshed with the sun gear for transmission, the second gear is meshed with the third gear for transmission, the fourth gear is meshed with the fifth gear for transmission, and the fifth gear is meshed with the ring gear for transmission.

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