A high torque density reduction motor

Abstract

The present invention discloses a reduction motor with high torque density, which relates to the technical field of reduction motors, and comprises a base, which is pre-set on a working surface, and a shock-absorbing spring is arranged between the bottom of the base and the working surface; a shell, which is fixed on the upper end surface of the base; a rear end cover, which is fixed on one end of the shell, and a plurality of heat dissipation grooves are opened on the circumference of the rear end cover; a front end cover, which is fixed on the other end of the shell, and a rotating shaft is rotatably arranged at its axial position, and the rotating shaft is connected to a load object; a drive-control integrated controller, which is fixed inside the rear end cover; an electric energy conversion component, which is installed inside the shell; a heat insulation disk, which is configured as two and symmetrically arranged at both ends of the electric energy conversion component; the present invention integrates the reduction component into a shell of limited length, so that the motor can output a larger torque in a small volume, and adopts a drive-control integrated controller, which does not need to configure a driver separately, solves the motor performance differences caused by different drivers, and allows the motor to run in an optimal state.

Description

Technical Field

[0001] The invention relates to the technical field of reduction motors, in particular to a reduction motor with high torque density. Background Art

[0002] A reduction motor is an integration of a reducer and a drive motor. This integration is also commonly called a gear motor or gear motor, and is usually assembled by a professional reducer manufacturer and supplied as a complete set with the motor.

[0003] The existing reduction motor is generally composed of a reducer and a driving machine. The driving machine provides power to the reducer, and the reducer increases the torque. The overall volume is large, and when the load is too large, the reduction motor is easily damaged.

[0004] In view of the above problems, the present invention provides a reduction motor with high torque density to solve the above problems. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution: a high torque density reduction motor, comprising:

[0006] A base is pre-set on the working surface, and a shock-absorbing spring is arranged between the bottom of the base and the working surface;

[0007] A shell, fixed to the upper end surface of the base;

[0008] A rear end cover is fixed to one end of the housing, and a plurality of heat dissipation grooves are provided on the circumference of the rear end cover;

[0009] A front end cover is fixed to the other end of the housing and is provided with a rotating shaft at its axial position for rotation, and the rotating shaft is connected to the load object;

[0010] A drive-control integrated controller, fixed inside the rear end cover;

[0011] An electric energy conversion assembly is installed inside the housing;

[0012] The heat insulation disks are configured in two and are symmetrically arranged at both ends of the electric energy conversion component and are fixed inside the shell; and the reduction assembly is installed inside one end of the shell close to the front end cover, and one of the heat insulation disks is located between the reduction assembly and the electric energy conversion assembly, and one end of the reduction assembly is connected to the rotating shaft, and the other end is connected to the electric energy conversion assembly.

[0013] Furthermore, preferably, the drive-control integrated controller adopts the CAN communication protocol.

[0014] Further, preferably, the housing comprises:

[0015] The housing has a side wall opening with a coolant inlet and a coolant outlet;

[0016] An inner shell is coaxially installed in the outer shell, and three sets of avoidance openings are circumferentially opened on the outer shell and the inner shell; and a cooling groove is opened between the outer shell and the inner shell, and the cooling groove is spiral, one end of which is connected to the coolant inlet, and the other end is connected to the coolant outlet.

[0017] Further, preferably, the electric energy conversion component comprises:

[0018] A stator, coaxially fixed inside the inner shell;

[0019] The stator winding poles are configured as a plurality of poles, which are circumferentially arranged on the inner wall of the stator, and the windings are wound around the plurality of stator winding poles;

[0020] A drive shaft is rotatably disposed between the rear end cover and the reduction assembly and passes through the two heat insulation disks;

[0021] A rotor is fixed on the driving shaft and is located in the stator; and a plurality of permanent magnets are configured and evenly distributed in the rotor.

[0022] Further, preferably, the deceleration assembly comprises:

[0023] A sun gear fixed on the driving shaft;

[0024] A ring gear is rotatably disposed in the inner shell, and six limiting grooves are formed on the circumference of one end of the ring gear close to the heat insulation plate;

[0025] A planetary disc is rotatably disposed in the front end cover and coaxially fixed with the rotating shaft, and three connecting shafts are fixed to the circumference of one end of the planetary disc away from the rotating shaft;

[0026] The planetary gears are configured into three and are rotatably arranged on the three connecting shafts respectively, and the three planetary gears are all meshed with the sun gear and the ring gear; and the limiting assembly is configured into three groups, which are circumferentially fixed in the inner shell and correspond to the limiting grooves.

[0027] Further, preferably, the limit assembly includes:

[0028] A limiting cylinder body, fixed to the inner wall of the inner shell;

[0029] An adjusting component is fixed in the avoidance opening and communicated with the interior of the limit cylinder;

[0030] A sliding column, which is slidably arranged in the limiting cylinder body, and a tension spring is arranged between the sliding column and the limiting cylinder body;

[0031] Two fixing blocks are configured, both of which are fixed to the inner wall of the inner shell and symmetrically arranged on both sides of the limiting cylinder body;

[0032] The guide column is configured as two and is slidably disposed in the two fixed blocks respectively;

[0033] A limit block, fixed to the sliding column and one end of the two guide columns, and capable of sliding in the limit groove;

[0034] The pressing column is configured as two, symmetrically and slidably arranged on both sides of the limit block, and a guide surface is provided at one end of the pressing column away from each other; and the sensing column is slidably arranged at the center position of the limit block.

[0035] Furthermore, preferably, both the limiting groove and the sensing column are embedded with a radiation sensor.

[0036] Further, preferably, the adjustment component comprises:

[0037] The regulating bin body is provided with a control valve at a position communicating with the limit cylinder body;

[0038] A threaded rod, which is threadedly connected to one end of the adjusting chamber body away from the limiting cylinder body, and one end of which is fixed with an adjusting handle, and the other end is located inside the adjusting chamber body and fixed with a pressing plate; and a pushing plate, which is slidably arranged in the adjusting chamber body and an adjusting spring is arranged between the pushing plate and the pushing plate.

[0039] Further, preferably, a sliding bin is provided inside the sliding column, a cross fixing frame is fixed inside the sliding bin, one end of the cross fixing frame is connected to a sealing ball by a spring, a sealing ring is also fixed inside the sliding bin, and the sealing ring and the sealing ball are in contact and cooperate to form a seal.

[0040] Compared with the prior art, the present invention provides a reduction motor with high torque density, which has the following beneficial effects:

[0041] The present invention integrates the reduction assembly into a shell of limited length, which greatly reduces the overall volume of the reduction motor, allowing the motor to output a larger torque in a small volume. When the reduction motor operates normally, the limit assembly is located in the limit groove, thereby limiting the ring gear. At this time, the planetary gear rotates and revolves around the sun gear, thereby driving the planetary disk and the rotating shaft to drive the load object. When the load of the reduction motor is too large or even blocked, the limit assembly is disengaged from the limit groove to allow the ring gear to rotate. At this time, the planetary disk is stationary relative to the load, and the planetary gear only rotates. At the same time, the rotor can continue to operate without causing damage to the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1It is an overall schematic diagram of a high torque density reduction motor;

[0043] Figure 2 It is a structural schematic diagram of the housing in the present invention;

[0044] Figure 3 It is a schematic diagram of the structure of the electric energy conversion component in the present invention;

[0045] Figure 4 It is a schematic diagram of the structure of the deceleration assembly in the present invention;

[0046] Figure 5 It is a structural schematic diagram of the limiting component in the present invention;

[0047] Figure 6 is a cross-sectional view of the limiting component in the present invention;

[0048] In the figure: 1, base; 2, shell; 3, rear end cover; 31, heat sink; 4, front end cover; 5, rotating shaft; 6, integrated drive and control controller; 7, power conversion component; 8, heat insulation plate; 9, speed reduction component; 21, outer shell; 22, inner shell; 23, cooling groove; 24, coolant inlet; 25, coolant outlet; 26, avoidance port; 71, stator; 72, stator winding column; 73, drive shaft; 74, rotor; 75, permanent magnet; 91, sun gear; 92, ring gear; 93, planetary disk; 94, connecting shaft; 95, Planetary gear; 96, limit groove; 961, beam sensor; 97, limit assembly; 971, limit cylinder; 972, adjustment assembly; 973, sliding column; 974, fixing block; 975, guide column; 976, limit block; 977, pressing column; 978, guide surface; 979, sensing column; 9721, adjustment bin body; 9722, threaded rod; 9723, adjustment spring; 9724, push plate; 9731, sliding bin; 9732, sealing ring; 9733, cross fixing frame; 9734, sealing ball. DETAILED DESCRIPTION

[0049] Reference Figure 1-Figure 6 The present invention provides a technical solution: a high torque density reduction motor, comprising:

[0050] A base 1 is pre-set on the working surface, and a shock-absorbing spring is arranged between the bottom of the base 1 and the working surface;

[0051] A shell 2 is fixed on the upper end surface of the base 1;

[0052] A rear end cover 3 is fixed to one end of the housing 2, and a plurality of heat dissipation slots 31 are provided on the circumference of the rear end cover 3;

[0053] A front end cover 4 is fixed to the other end of the housing 2, and a rotating shaft 5 is rotatably provided at the axial position thereof, and the rotating shaft 5 is connected to the load object;

[0054] The integrated drive and control controller 6 is fixed inside the rear end cover 3;

[0055] An electric energy conversion assembly 7 is installed inside the housing 2;

[0056] The heat insulation disk 8 is configured as two, symmetrically arranged at both ends of the electric energy conversion component 7, and both are fixed inside the shell 2; and the reduction assembly 9 is installed inside one end of the shell 2 close to the front end cover 4, and one of the heat insulation disks 8 is located between the reduction assembly 9 and the electric energy conversion component 7, and one end of the reduction assembly 9 is connected to the rotating shaft 5, and the other end is connected to the electric energy conversion component 7.

[0057] Among them, a shock-absorbing spring is arranged between the base 1 and the working surface, which can reduce the vibration and impact conditions when the motor is running, and ensure the stable operation of the motor.

[0058] In this embodiment, the integrated drive and control controller 6 adopts the CAN communication protocol.

[0059] In other words, by using CAN communication, the motor speed can be controlled according to instructions, and the real-time temperature, current, speed and other data of the motor can be sent out, thereby improving real-time monitoring of the motor and ensuring the stable operation of the motor.

[0060] In this embodiment, the housing 2 includes:

[0061] The housing 21 has a side wall opening with a coolant inlet 24 and a coolant outlet 25;

[0062] The inner shell 22 is coaxially installed in the outer shell 21, and three sets of avoidance openings 26 are circumferentially opened on the outer shell 21 and the inner shell 22; and the cooling groove 23 is opened between the outer shell 21 and the inner shell 22, and the cooling groove 23 is spiral, one end of which is connected to the coolant inlet 24, and the other end is connected to the coolant outlet 25.

[0063] That is to say, the heat dissipation groove 31 opened on the rear end cover 3 can assist in the heat dissipation of the inside of the shell 2, and the heat insulation plate 8 can prevent the heat generated by the power conversion component 7 from escaping, so that the heat is concentratedly dissipated through the cooling groove 23 to prevent the heat from damaging the integrated drive and control controller 6.

[0064] As a preferred embodiment, the electric energy conversion component 7 includes:

[0065] A stator 71, coaxially fixed inside the inner shell 22;

[0066] The stator winding poles 72 are configured as a plurality of poles, which are circumferentially arranged on the inner wall of the stator 71, and the plurality of stator winding poles 72 are all wound with windings;

[0067] A driving shaft 73 is rotatably disposed between the rear end cover 3 and the speed reduction assembly 9 and passes through the two heat insulation plates 8;

[0068] The rotor 74 is fixed on the driving shaft 73 and is located in the stator 71 ; and the permanent magnets 75 are configured in multiple numbers and are evenly distributed in the rotor 74 .

[0069] As a preferred embodiment, the deceleration assembly 9 includes:

[0070] A sun gear 91 is fixed on the driving shaft 73;

[0071] A ring gear 92 is rotatably disposed in the inner shell 22, and six limiting grooves 96 are formed on the circumference of one end of the ring gear 92 close to the heat insulation plate 8;

[0072] A planetary disc 93 is rotatably disposed in the front end cover 4 and coaxially fixed with the rotating shaft 5, and three connecting shafts 94 are fixed to the circumference of one end of the planetary disc 93 away from the rotating shaft 5;

[0073] The planetary gears 95 are configured as three and are rotatably arranged on the three connecting shafts 94 respectively, and the three planetary gears 95 are all engaged with the sun gear 91 and the ring gear 92; and the limit assembly 97 is configured as three groups, which are circumferentially fixed in the inner shell 22 and correspond to the limit groove 96.

[0074] It should be noted that the initial state of the limit assembly 97 is to be located in the limit groove 96, thereby limiting the ring gear 92, allowing the sun gear 91 to drive the planetary disc 93 to rotate. At this time, the planetary gear 95 rotates on its own and revolves around the sun gear 91. When the shaft 5 reaches the maximum set load, the limit assembly 97 disengages from the limit groove 96, allowing the ring gear 92 to rotate. At this time, the planetary disc 93 is in a stationary state relative to the load, and the planetary gear 95 only rotates on its own to avoid damage to the motor.

[0075] As a preferred embodiment, the limiting assembly 97 includes:

[0076] The limiting cylinder 971 is fixed to the inner wall of the inner shell 22;

[0077] The adjusting assembly 972 is fixed in the avoiding opening 26 and communicated with the interior of the limiting cylinder 971;

[0078] A sliding column 973 is slidably disposed in the limiting cylinder 971, and a tension spring is disposed between the sliding column 973 and the limiting cylinder 971;

[0079] The fixing blocks 974 are configured as two, both of which are fixed to the inner wall of the inner shell 22 and symmetrically arranged on both sides of the limiting cylinder 971;

[0080] The guide pillars 975 are configured as two and are slidably disposed in the two fixing blocks 974 respectively;

[0081] A limit block 976 is fixed to one end of the sliding column 973 and the two guide columns 975 and can slide in the limit groove 96;

[0082] The pressing column 977 is configured as two, symmetrically and slidably arranged on both sides of the limit block 976, and a guide surface 978 is provided at one end of the pressing column 977 away from each other; and the sensing column 979 is slidably arranged at the center position of the limit block 976.

[0083] As a preferred embodiment, both the limiting groove 96 and the sensing column 979 are embedded with a corresponding radiation sensor 961 .

[0084] Among them, the limit cylinder 971, the sliding column 973 and the adjustment component 972 are all filled with hydraulic oil, which ensures the stability of the operation of the limit component 97. When the limit component 97 is separated from the limit groove 96 and needs to be limited again, the position is sensed by the limit groove 96 and the corresponding sensor 961 in the sensing column 979. When reaching the correct position, the limit component 97 enters the limit groove 96 again for limiting, so that the ring gear 92 is in a stationary state.

[0085] As a preferred embodiment, the adjustment component 972 includes:

[0086] The regulating bin 9721 is provided with a control valve at a position communicating with the limit cylinder 971;

[0087] A threaded rod 9722 is threadedly connected to one end of the adjusting chamber body 9721 away from the limiting cylinder body 971, and an adjusting handle is fixed at one end thereof, and the other end is located inside the adjusting chamber body 9721 and is fixed with a pressing plate; and a pushing plate 9724 is slidably arranged in the adjusting chamber body 9721, and an adjusting spring 9723 is arranged between the pushing plate and the adjusting chamber body 9721.

[0088] It should be noted that the control valve is in a normally open state. When the amount of hydraulic oil entering the regulating chamber 9721 is sufficient to cause the limit block 976 to disengage from the limit groove 96, the control valve is closed to allow the limit assembly 97 to completely disengage from the limit groove 96. When the limit assembly 97 needs to be moved to the limit groove 96 again, the position is first determined by the incident sensor 961, and then the control valve is opened to allow the hydraulic oil to push the limit block 976 into the limit groove 96, and to allow the pressing column 977 to contact the limit groove 96 for limit.

[0089] As a preferred embodiment, a sliding bin 9731 is provided inside the sliding column 973, a cross fixing frame 9733 is fixed inside the sliding bin 9731, one end of the cross fixing frame 9733 is connected to a sealing ball 9734 by a spring, a sealing ring 9732 is also fixed inside the sliding bin 9731, and the sealing ring 9732 and the sealing ball 9734 are in contact and cooperate to form a seal.

[0090] That is to say, before adjusting the adjusting component 972, it is necessary to first confirm the input current of the electric energy conversion component 7 to determine the torque value, and then the adjusting spring 9723 is extended and retracted by rotating the threaded rod 9722 to determine the maximum torque, and when the limit assembly 97 is located inside the limit groove 96, the sensing column 979 presses the sealing ball 9734, so that the sealing ball 9734 is separated from the sealing ring 9732, so that the limit block 976, the sliding bin 9731, the limit cylinder body 971 and the adjusting bin body 9721 are in a connected state. At this time, when the load of the rotating shaft 5 reaches the maximum torque value, the limit groove 96 pushes the pressing column 977 to move the hydraulic oil into the adjusting bin body 9721, so that the sliding column 973 is contracted by the tension spring, thereby causing the limit assembly 97 to separate from the limit groove 96.

[0091] Specifically, first, determine the maximum torque of the adjustment motor, then make corresponding numerical adjustments to the adjustment component 972, and then connect the rotating shaft 5 to the load for driving. When the load exceeds the maximum torque, the limit component 97 disengages from the limit groove 96, allowing the ring gear 92 to rotate to avoid damage to the motor, and integrate the reduction component 9 into the housing 2 of limited length, so that the motor can output a larger torque in a small volume, and through the drive-control integrated controller 6, using the CAN communication protocol, the motor speed can be controlled according to instructions, and the real-time temperature, current, speed and other data of the motor can be sent out.

[0092] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high torque density reduction motor, characterized in that: include: A base is pre-set on the working surface, and a shock-absorbing spring is arranged between the bottom of the base and the working surface; A shell body, fixed to the upper end surface of the base; A rear end cover is fixed to one end of the shell, and a plurality of heat dissipation slots are provided on the circumference of the rear end cover; The front end cover is fixed to the other end of the shell, and a rotating shaft is rotatably arranged at the axis position thereof, and the rotating shaft is connected to the load object; The integrated drive and control controller is fixed inside the rear end cover; An electric energy conversion assembly is installed inside the housing; The heat insulation disk is configured as two and symmetrically arranged at both ends of the electric energy conversion assembly and fixed inside the shell; The housing includes: The housing has a side wall opening with a coolant inlet and a coolant outlet; The inner shell is coaxially installed in the outer shell, and three sets of avoidance openings are circumferentially opened on the outer shell and the inner shell; Power conversion components include: A drive shaft is rotatably disposed between the rear end cover and the reduction assembly and passes through the two heat insulation disks; The reduction components include: A sun gear, fixed to the drive shaft; The ring gear is rotatably arranged in the inner shell, and six limiting grooves are provided on the circumference of one end of the ring gear close to the heat insulation plate; The limiter assembly is configured into three groups, and the circumference is fixed in the inner shell, corresponding to the limiter groove; The limiter components include: The limiting cylinder is fixed to the inner wall of the inner shell; The adjusting component is fixed in the avoidance opening and communicated with the interior of the limit cylinder; A sliding column is slidably arranged in the limiting cylinder body, and a tension spring is arranged between the sliding column and the limiting cylinder body; The fixing blocks are configured as two, both of which are fixed to the inner wall of the inner shell and symmetrically arranged on both sides of the limiting cylinder body; The guide column is configured as two and is slidably disposed in the two fixed blocks respectively; The limit block is fixed to the sliding column and one end of the two guide columns and can slide in the limit groove; The pressing column is configured as two and is symmetrically and slidably arranged on both sides of the limit block, and a guide surface is provided at one end of the pressing column away from each other; the sensing column is slidably arranged at the center position of the limit block.

2. A high torque density reduction motor according to claim 1, characterized in that: The CAN communication protocol is adopted in the integrated drive and control controller.

3. A high torque density reduction motor according to claim 1, characterized in that: It also includes a reduction assembly installed inside one end of the shell near the front end cover, wherein a heat insulation disk is located between the reduction assembly and the electric energy conversion assembly, one end of the reduction assembly is connected to the rotating shaft, and the other end is connected to the electric energy conversion assembly.

4. A high torque density reduction motor according to claim 1, characterized in that: The housing also includes: The cooling groove is opened between the outer shell and the inner shell. The cooling groove is spiral-shaped, one end of which is connected to the coolant inlet and the other end of which is connected to the coolant outlet.

5. A high torque density reduction motor according to claim 1, characterized in that: The power conversion components also include: A stator is coaxially fixed inside the inner shell; The stator winding poles are configured as a plurality of poles and are circumferentially arranged on the inner wall of the stator, and the windings are wound around the plurality of stator winding poles; The rotor is fixed on the driving shaft and is located inside the stator; the permanent magnets are configured into a plurality and are evenly distributed inside the rotor.

6. A high torque density reduction motor according to claim 1, characterized in that: The reduction components also include: The planetary disc is rotatably arranged in the front end cover and fixed coaxially with the rotating shaft. Three connecting shafts are fixed on the circumference of one end of the planetary disc away from the rotating shaft. The planetary gears are configured in three and are rotatably arranged on three connecting shafts respectively. The three planetary gears are all meshed with the sun gear and the ring gear.

7. A high torque density reduction motor according to claim 1, characterized in that: Both the limit slot and the sensing column are embedded with a beam sensor.

8. The high torque density reduction motor according to claim 1, characterized in that: The adjustment components include: The regulating bin body is provided with a control valve at a position communicating with the limit cylinder body; A threaded rod is threadedly connected to one end of the adjustment bin body away from the limiting cylinder body, and an adjustment handle is fixed at one end of the rod, and a pressing plate is fixed at the other end of the rod; and a pushing plate is slidably arranged in the adjustment bin body, and an adjustment spring is arranged between the pushing plate and the pushing plate.

9. A high torque density reduction motor according to claim 7, characterized in that: A sliding bin is provided inside the sliding column, a cross fixing frame is fixed inside the sliding bin, one end of the cross fixing frame is connected with a sealing ball by a spring, a sealing ring is also fixed inside the sliding bin, and the sealing ring and the sealing ball are in contact and cooperate to seal.

Images