Energy-saving gear motor based on coaxial installation structure

Abstract

The invention discloses an energy-saving gear motor based on a coaxial installation structure, and relates to the technical field of motors. The stator is fixedly arranged on the inner wall of the motor shell; the rotor is matched with the stator, and the rotor comprises a rotating shaft; the first shell is fixedly connected to one side of the motor shell; the second shell is internally provided with a speed reducer, the speed reducer is provided with an input shaft, and the input shaft is coaxially connected with the rotating shaft through a coaxial transmission assembly; wherein the first shell is fixedly connected with the second shell, and the structure can improve the connection stability of the first shell and the second shell on the basis of guaranteeing the coaxial installation of the rotating shaft and the input shaft.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically to an energy-saving geared motor based on a coaxial mounting structure. Background Technology

[0002] As a component that matches the power source with the actuator, the geared motor has been widely used in industrial automation, precision manufacturing, robotics and other fields due to its advantages such as compact structure and large output torque.

[0003] In existing technologies, the coaxial mounting structure of the motor and reducer generally suffers from some insurmountable defects. Firstly, the core contradiction lies in the inability to simultaneously achieve internal transmission precision and external assembly convenience. A common practice is to first align and tighten the motor housing and reducer housing with bolts, and then connect the motor shaft to the reducer shaft. While this method of assembling first and then aligning is simple, the manufacturing tolerances of the through holes in the housing are directly transmitted to the internal transmission system, resulting in unavoidable coaxiality errors between the motor shaft and the reducer shaft.

[0004] Another approach is to use a process of centering first and then assembling, that is, first aligning and connecting the motor shaft and the reducer shaft, and then attempting to align the bolt holes on the housing. However, this method introduces new problems: once the internal shaft system forms a rigid reference, a slight misalignment will almost inevitably occur between the pre-machined through holes on the two housings. To force alignment, operators often need to use tools to pry or enlarge the holes, which not only increases the assembly difficulty and cost, but also generates huge assembly stress inside the housing, thus compromising the achieved precision coaxiality.

[0005] Therefore, it is necessary to provide an energy-saving geared motor based on a coaxial mounting structure to solve the above problems. Summary of the Invention

[0006] To address the aforementioned problems, the present invention provides the following technical solution: an energy-saving geared motor based on a coaxial mounting structure, comprising: a motor housing; a stator, the stator being fixedly disposed on the inner wall of the motor housing; a rotor, the rotor cooperating with the stator, and the rotor including a rotating shaft; a first outer shell, the first outer shell being fixedly connected to one side of the motor housing; a second outer shell, the second outer shell housing a reducer, the reducer having an input shaft, the input shaft being coaxially connected to the rotating shaft via a coaxial transmission assembly; wherein, the first outer shell and the second outer shell are fixedly connected.

[0007] Preferably, the input shaft has a transmission rod at the end near the rotating shaft, and the rotating shaft has a transmission groove at the end near the input shaft that cooperates with the transmission rod.

[0008] Preferably, the transmission rod has a radially extending anti-detachment block on its side; the coaxial transmission assembly includes: a positioning ring, which is fixedly sleeved on the rotating shaft and has a circumferential groove; two anti-detachment half-rings, each of which has a snap-fit ​​groove on its inner wall for snapping the anti-detachment block, the side of the anti-detachment half-ring abutting against the positioning ring, the two anti-detachment half-rings forming an annular structure surrounding the transmission rod, each anti-detachment half-ring having a semi-annular groove; two snap-fit ​​half-rings, which snap into the annular groove and the semi-annular groove, and the two snap-fit ​​half-rings forming an annular structure surrounding the anti-detachment half-ring and the positioning ring; the joints of the two snap-fit ​​half-rings are misaligned with the joints of the two anti-detachment half-rings; and a clamp, which is sleeved on the outer periphery of the annular structure formed by the two snap-fit ​​half-rings and locked in place.

[0009] Preferably, the first outer shell has a plurality of first through holes distributed circumferentially, and the second outer shell has a plurality of second through holes corresponding to the first through holes. A synchronous positioning component is embedded in the second through hole. The synchronous positioning component is configured to adapt to the offset within the position tolerance range between the first through hole and the second through hole when the first outer shell and the second outer shell are connected by bolts passing through the first through hole and the synchronous positioning component, and to achieve positioning between the two outer shells.

[0010] Preferably, the synchronous positioning component includes: an intermediate ring, which is a rigid ring; an outer ring, which is made of a flexible material and coaxially sleeved on the outside of the intermediate ring; and two ring gaskets, which seal the ends of the outer ring and the intermediate ring respectively; wherein the intermediate ring, the outer ring, and the two ring gaskets enclose a first accommodating space for accommodating molten metal, which is liquid at high temperature and solid at low temperature.

[0011] Preferably, an inner ring is coaxially embedded on the inner side of the intermediate ring. The inner ring is made of a flexible material, and the ring gasket extends inward and is sealed to both ends of the inner ring, so that the intermediate ring, the inner ring, and the two ring gaskets enclose a second accommodating space for accommodating the elastic ball and water. The inner diameter of the inner ring, the inner diameter of the ring gasket, and the diameter of the first through hole are the same.

[0012] Preferably, when the synchronous positioning component is installed, the water is in a solid state, the molten metal is in a liquid state, and the total volume of the water and the elastic ball is smaller than the volume of the second accommodating space.

[0013] Preferably, the stator has a hollow structure, and the rear of the motor housing has ventilation holes.

[0014] Compared with the prior art, the present invention provides an energy-saving geared motor based on a coaxial mounting structure, which has the following advantages:

[0015] This invention first uses a coaxial transmission assembly to rigidly coaxially connect the rotating shaft and the input shaft, and then uses the flexible adaptive characteristics of the synchronous positioning assembly to accommodate the resulting misalignment of the housing holes, thus fundamentally eliminating coaxiality deviation caused by assembly stress and ensuring efficient force transmission.

[0016] In this invention, the synchronous positioning component utilizes the phase change characteristics of molten metal and water to achieve functional switching of a single component during assembly. During installation, the external molten metal provides flexibility to accommodate misalignment, while the internal solid ice provides rigidity to uniformly guide the bolts. After installation, the external metal solidifies to achieve rigid positioning, while the internal ice melts to release elastic balls for continuous dynamic clamping and vibration damping. Attached Figure Description

[0017] Figure 1 This is a cross-sectional schematic diagram of an energy-saving geared motor based on a coaxial mounting structure;

[0018] Figure 2 This is a cross-sectional view of the coaxial transmission assembly.

[0019] Figure 3 A cross-sectional view of the synchronous positioning component;

[0020] Figure 4 This is a schematic diagram of the material distribution structure of the middle ring;

[0021] Figure 5 A schematic diagram of the installation structure for the synchronous positioning component;

[0022] In the diagram: 1. Motor housing; 2. Stator; 3. Shaft; 4. First outer shell; 5. Second outer shell; 6. Reducer; 7. Input shaft; 8. Coaxial transmission assembly; 9. Synchronous positioning assembly; 10. Second through hole; 71. Transmission rod; 72. Anti-detachment block; 81. Positioning ring; 82. Anti-detachment half ring; 83. Snap-fit ​​half ring; 91. Outer ring; 92. Intermediate ring; 93. Liquid metal; 94. Inner ring; 95. Elastic ball; 96. Ring gasket; 921. Rigid component; 922. First heat insulation pad; 923. Second heat insulation pad. Detailed Implementation

[0023] In the embodiments of the present invention, please refer to Figures 1-5An energy-saving geared motor based on a coaxial mounting structure is provided, comprising: a motor housing 1; a stator 2, the stator 2 being fixedly disposed on the inner wall of the motor housing 1; a rotor, the rotor cooperating with the stator 2, and the rotor including a rotating shaft 3; a first outer shell 4, the first outer shell 4 being fixedly connected to one side of the motor housing 1; and a second outer shell 5, the second outer shell 5 having a reducer 6 installed inside, the reducer 6 having an input shaft 7, the input shaft 7 being coaxially connected to the rotating shaft 3 through a coaxial transmission assembly 8; wherein, the first outer shell 4 and the second outer shell 5 are fixedly connected.

[0024] In this embodiment, the stator 2 is fixed inside the motor housing 1. When energized, the stator 2 generates a rotating magnetic field, driving the internal rotor to rotate. The rotational motion of the rotor is output through the shaft 3 on it. The power output by the shaft 3 does not directly drive the load, but is transmitted to the input shaft 7 of the reducer 6 through the coaxial transmission assembly 8.

[0025] The function of reducer 6 is to convert the input high-speed, low-torque power to output low-speed, high-torque power to meet the needs of subsequent working mechanisms.

[0026] Because a coaxial transmission assembly 8 connects the rotating shaft 3 and the reducer 6, the coaxiality of power input and output is fundamentally guaranteed. This greatly reduces vibration, impact, and additional wear caused by shaft misalignment.

[0027] The input shaft 7 has a transmission rod 71 at its end near the rotating shaft 3, and the rotating shaft 3 has a transmission groove at its end near the input shaft 7 that mates with the transmission rod 71. Additionally, a radially extending anti-detachment block 72 is provided on the side of the transmission rod 71.

[0028] The coaxial transmission assembly 8 includes: a positioning ring 81, which is fixedly sleeved on the rotating shaft 3, and has a circumferential groove; two anti-detachment semi-rings 82, the inner walls of which each anti-detachment semi-ring has a locking groove for locking the anti-detachment block 72, the side of each anti-detachment semi-ring abuts against the positioning ring 81, and the two anti-detachment semi-rings 82 are combined to form an annular structure surrounding the transmission rod 71, each anti-detachment semi-ring having a semi-annular groove; two locking semi-rings 83, which are locked into the annular groove and the semi-annular groove, and are combined to form an annular structure surrounding the anti-detachment semi-ring 82 and the positioning ring 81; the joints of the two locking semi-rings 83 are misaligned with the joints of the two anti-detachment semi-rings 82; and a clamp, which is sleeved on the outer periphery of the annular structure formed by the two locking semi-rings 83 and locked in place.

[0029] In this embodiment, the transmission rod 71 on the input shaft 7 engages with the transmission groove at the end of the motor shaft 3 (similar to a spline or key connection), which is the basis for torque transmission. When the shaft 3 rotates, the transmission groove drives the transmission rod 71, thereby causing the input shaft 7 to rotate synchronously. To prevent the transmission rod 71 from dislodging from the transmission groove due to vibration or axial force during operation, in this embodiment, the anti-dislodgement block 72 on the side of the transmission rod 71 forms a snap-fit ​​relationship with the snap-fit ​​grooves on the inner walls of the two anti-dislodgement semi-rings 82. When the two anti-dislodgement semi-rings 82 combine to form a ring structure and surround the transmission rod 71, the anti-dislodgement block 72 is snapped into the snap-fit ​​groove, physically restricting the axial movement of the transmission rod 71 and achieving a reliable anti-dislodgement function.

[0030] In implementation, firstly, the positioning ring 81 is pre-fixed on the rotating shaft 3. Secondly, two snap-fit ​​semi-rings 83 are installed into the space formed by the annular groove of the positioning ring 81 and the semi-annular groove of the anti-detachment semi-ring 82, which radially tighten the anti-detachment semi-ring 82 and the positioning ring 81. It is particularly noteworthy that the joints of the snap-fit ​​semi-rings 83 and the anti-detachment semi-ring 82 are misaligned; this design avoids stress concentration and forms a more complete annular constraint. Finally, a clamp (not shown in the figure) is used for strong locking on the outermost layer. The radial contraction force of the clamp is evenly transmitted to the inner anti-detachment semi-ring 82 and the positioning ring 81 through the snap-fit ​​semi-rings 83.

[0031] In this embodiment, the clamp is a relatively general component name. In practical applications, the clamp can be a worm gear hose clamp, characterized by using a worm gear mechanism to adjust the tightness, offering a wide adjustment range and convenient assembly and disassembly.

[0032] Bolted clamps: consist of a metal ring with an opening and at least one set of bolts and nuts. Tightening the bolts tightens the opening, providing a strong and uniform clamping force.

[0033] After the rotating shaft 3 and the input shaft 7 are coaxially connected using the coaxial transmission assembly 8, the second housing 5 needs to be installed on the first housing 4. The first housing 4 has a plurality of first through holes distributed circumferentially, and the second housing 5 has a plurality of second through holes 10 corresponding to the first through holes. The second through holes 10 are embedded with a synchronous positioning assembly 9.

[0034] The synchronous positioning component 9 is configured such that when the first outer shell 4 and the second outer shell 5 are connected to the synchronous positioning component 9 by bolts passing through the first through hole, it adapts to the offset within the position tolerance range between the first through hole and the second through hole 10, and realizes the positioning between the two outer shells (first outer shell 4 and second outer shell 5). After the bolt passes through the first through hole and the synchronous positioning component 9, a nut is threaded onto the bolt.

[0035] It should be explained that the highest priority objective of this structure is to ensure the coaxiality of the rotating shaft 3 and the input shaft 7. To achieve this objective, the rotating shaft 3 and the input shaft 7 must first be coaxially connected and locked using the coaxial transmission assembly 8 during assembly.

[0036] When the rotating shaft 3 and the input shaft 7 are forced to be coaxially aligned via the coaxial transmission assembly 8, they form a rigid internal reference. This internal reference, in turn, determines the relative position between the first housing 4 on the motor side and the second housing 5 on the reducer 6 side.

[0037] However, the first through hole on the first housing 4 and the second through hole 10 on the second housing 5 are pre-machined during the parts manufacturing stage. When the rotating shaft 3 and the input shaft 7 are coaxially connected and locked using the coaxial transmission assembly 8, slight misalignment may occur between these pre-machined through holes (first through hole, second through hole 10). This misalignment is the price paid to ensure internal coaxiality.

[0038] At this point, the role of the synchronous positioning component 9 becomes apparent. When the bolt passes through the first through hole and attempts to connect with the second through hole 10, the synchronous positioning component 9 can actively adapt to this hole position offset. Through its own deformation, it provides a suitable channel for the bolt, ensuring that the bolt can be smoothly inserted and ultimately tightened.

[0039] In other words, this embodiment implements an assembly process of centering first and then locking. Traditional processes often require repeated adjustments to the position of the outer shell to align the holes, which may affect the already aligned internal components.

[0040] Specifically, the synchronous positioning component 9 includes: an intermediate ring 92, which is a rigid ring; an outer ring 91, which is made of a flexible material and is coaxially sleeved on the outside of the intermediate ring 92; and two ring pads 96, which seal the ends of the outer ring 91 and the intermediate ring 92 respectively. The intermediate ring 92, the outer ring 91, and the two ring pads 96 together form a first accommodating space, which is used to accommodate liquid metal 93, which is liquid at high temperature and solid at low temperature.

[0041] An inner ring 94 is coaxially embedded on the inner side of the intermediate ring 92. The inner ring 94 is made of flexible material. The ring gasket 96 extends inward and is sealed to both ends of the inner ring 94, so that the intermediate ring 92, the inner ring 94 and the two ring gaskets 96 enclose a second accommodating space. The second accommodating space is used to accommodate the elastic ball 95 and the water. The inner diameter of the inner ring 94, the inner diameter of the ring gasket 96 and the diameter of the first through hole are the same.

[0042] When the synchronous positioning component 9 is installed, the water is in a solid state, the liquid metal 93 is in a liquid state, and the total volume of the water and the elastic ball 95 is smaller than the volume of the second accommodating space.

[0043] During installation, the molten metal 93 in the first external accommodating space is in a liquid state; the water in the second internal accommodating space is in a solid state (ice).

[0044] Since the molten metal 93 is in a liquid state, the outer flexible outer ring 91 can drive the entire component to make slight translations or swings within the second through hole 10 under the support of the molten metal 93, so that it can actively adapt to and absorb the hole misalignment caused by the internal coaxial connection.

[0045] Meanwhile, the internal ice compresses and fixes the elastic ball 95, forming a robust rigid sleeve together with the inner ring 94. When the bolt passes through the first through hole and contacts the inner ring 94, this internal rigid structure can withstand the thrust of the bolt without undergoing uneven deformation, ensuring that the force is evenly transmitted throughout the assembly and guiding the bolt through.

[0046] After the outer casing is installed and returns to room temperature, the external molten metal 93 cools and solidifies; the internal ice melts into liquid water.

[0047] The solidified metal completely and rigidly locks the outer ring 91, the middle ring 92, and the inner wall of the second through hole 10, forming a metal bushing.

[0048] As the ice melts, the internal elastic balls 95 are released into the liquid water, losing their rigid support. At this point, the tiny radial gap between the bolt and the inner ring 94 is uniformly filled and expanded by the elastic balls 95 in the liquid water medium. These elastic balls 95 apply a continuous and uniform radial pressure to the bolt from all directions, achieving dynamic elastic clamping.

[0049] The molten metal may be selected from:

[0050] Gallium-based alloys: The melting point can be precisely set in the range of 10℃ to 60℃ by adjusting the ratio.

[0051] Bismuth-based alloys: The melting point of bismuth-indium-tin alloys with specific ratios can be controlled at 45℃.

[0052] These alloys can melt in hot water at 45°C and solidify at room temperature at 25°C.

[0053] During implementation, the area enclosed by the inner ring 94 is first cooled down, for example, by introducing low-temperature fluid into the channels of the inner ring 94, so that the water can be cooled down to below 0°C quickly and efficiently.

[0054] Simultaneously or shortly thereafter, the area enclosed by the outer ring 91 is heated. For example, a hair dryer or induction heating coil is used for heating. The heat is transferred to the molten metal 93 within the first accommodating space, causing it to reach its melting point (e.g., 45°C) and become liquid.

[0055] Furthermore, the intermediate ring 92 has a three-layer structure, with a rigid member 921 in the middle; one side of the rigid member 921 is a first heat insulation pad 922, and the other side is a second heat insulation pad 923.

[0056] In this embodiment, the stator 2 is a hollow structure, and the rear of the motor housing 1 has ventilation holes.

[0057] During the operation of the geared motor, components such as the stator and rotor generate a large amount of heat due to current and friction. If the heat accumulates inside the motor housing 1, it will lead to excessively high temperatures. In this embodiment, ventilation holes are provided at the rear of the motor housing 1, which, together with the hollow structure of the stator 2, provide a dedicated channel for the exhaust of internal hot air.

[0058] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An energy-saving geared motor based on a coaxial mounting structure, characterized in that, include: Motor housing (1); Stator (2), the stator (2) is fixedly disposed on the inner wall of the motor housing (1); The rotor is coupled with the stator (2) and the rotor includes a shaft (3). The first outer casing (4) is fixed to one side of the motor housing (1); The second housing (5) has a speed reducer (6) installed inside it. The speed reducer (6) has an input shaft (7) which is coaxially connected to the rotating shaft (3) via a coaxial transmission assembly (8). The first outer shell (4) is fixedly connected to the second outer shell (5).

2. The energy-saving geared motor based on a coaxial mounting structure according to claim 1, characterized in that, The input shaft (7) has a transmission rod (71) at the end near the rotating shaft (3), and the rotating shaft (3) has a transmission groove that cooperates with the transmission rod (71) at the end near the input shaft (7).

3. The energy-saving geared motor based on a coaxial mounting structure according to claim 2, characterized in that, The transmission rod (71) is provided with a radially extending anti-detachment block (72) on its side. The coaxial transmission assembly (8) includes: Positioning ring (81), the positioning ring (81) is fixedly sleeved on the rotating shaft (3), and the positioning ring (81) has a circumferential groove; Two anti-detachment semi-rings (82), the inner walls of the two anti-detachment semi-rings (82) are provided with snap-fit ​​grooves for snapping the anti-detachment block (72), the side of the anti-detachment semi-rings (82) abuts against the positioning ring (81), the two anti-detachment semi-rings (82) are combined to form a ring structure surrounding the transmission rod (71), and each anti-detachment semi-ring (82) is provided with a semi-ring groove; Two snap-fit ​​semi-rings (83) are snapped into the annular groove and the semi-annular groove, and the two snap-fit ​​semi-rings (83) are combined to form an annular structure surrounding the anti-detachment semi-ring (82) and the positioning ring (81); the joints of the two snap-fit ​​semi-rings (83) and the joints of the two anti-detachment semi-rings (82) are misaligned with each other; The clamp is fitted around the outer periphery of the ring structure formed by the two snap-fit ​​half-rings (83) and locked in place.

4. The energy-saving geared motor based on a coaxial mounting structure according to claim 1, characterized in that, The first outer shell (4) has a plurality of first through holes distributed in the circumferential direction, and the second outer shell (5) has a plurality of second through holes (10) corresponding to the first through holes. The second through holes (10) are embedded with a synchronous positioning component (9). The synchronous positioning component (9) is configured to adapt to the offset within the position tolerance range between the first through hole and the second through hole (10) when the first shell (4) and the second shell (5) are connected by bolts passing through the first through hole and the synchronous positioning component (9), and to achieve positioning between the two shells.

5. An energy-saving geared motor based on a coaxial mounting structure according to claim 4, characterized in that, The synchronous positioning component (9) includes: Intermediate ring (92), wherein the intermediate ring (92) is a rigid ring; The outer ring (91) is made of flexible material and is coaxially sleeved on the outside of the middle ring (92); Two ring gaskets (96), the outer ring (91) and the two ends of the middle ring (92) are respectively sealed and connected by one of the ring gaskets (96); The intermediate ring (92), the outer ring (91) and the two ring pads (96) form a first accommodating space, which is used to accommodate liquid metal (93). The liquid metal (93) is liquid at high temperature and solid at low temperature.

6. An energy-saving geared motor based on a coaxial mounting structure according to claim 5, characterized in that, An inner ring (94) is coaxially embedded on the inner side of the intermediate ring (92). The inner ring (94) is made of flexible material. The ring pad (96) extends inward and is sealed to both ends of the inner ring (94), so that the intermediate ring (92), the inner ring (94) and the two ring pads (96) enclose a second accommodating space. The second accommodating space is used to accommodate the elastic ball (95) and the water. The inner diameter of the inner ring (94), the inner diameter of the ring gasket (96), and the diameter of the first through hole are the same.

7. An energy-saving geared motor based on a coaxial mounting structure according to claim 6, characterized in that, When the synchronous positioning component (9) is installed, the water is in a solid state, the liquid metal (93) is in a liquid state, and the total volume of the water and the elastic ball (95) is less than the volume of the second accommodating space.

8. An energy-saving geared motor based on a coaxial mounting structure according to claim 1, characterized in that, The stator (2) has a hollow structure, and the tail of the motor housing (1) has ventilation holes.

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