A drive motor having multiple drive states

Abstract

The application discloses a driving motor with multiple driving states, which comprises a motor shell, an outer rotating shaft, an inner rotating shaft located in the outer rotating shaft, a stator installed at the motor shell and a rotor installed at the outer rotating shaft, the motor shell comprises a first end cover, a second end cover and a barrel body connecting the first end cover and the second end cover, the second end cover is connected with a cylinder body, the cylinder body is provided with an oil inlet and outlet hole, a piston unit is installed in the cylinder body, the piston unit is connected with a mounting ring, and the mounting ring and the inner rotating shaft are connected through a bearing unit. The driving motor of the application can integrate the inner rotating shaft in the outer rotating shaft, and realizes the translation of the inner rotating shaft through a hydraulic system, so that the switching of two states is realized. The driving motor of the application has high transmission stability, high integration degree of the device and small occupied space.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more specifically, to a drive motor having multiple driving states. Background Technology

[0002] Drive motors are core power components in new energy vehicles, electromechanical equipment, and other devices. Their function is to convert electrical energy into mechanical energy to provide driving force for the equipment. With the rapid development of industrial automation, new energy vehicles, and other fields, the demand for drive motors is increasing rapidly.

[0003] In the operation of mechanical transmission systems, sometimes a single motor is needed to drive multiple systems and switch between two states, similar to the effect of a clutch. Existing motors struggle to achieve ideal driving and switching performance under such complex conditions. Some motors utilize external translation devices to achieve multi-system driving and state switching. However, from a structural perspective, introducing external translation devices makes the entire mechanical transmission system more complex, significantly increasing the difficulty of maintenance and repair. Furthermore, external translation devices require additional installation space, resulting in a large footprint and low integration of the entire mechanical device. The switching performance between the two states by external translation devices is also unsatisfactory. Delays, jams, and even malfunctions can easily occur during switching, failing to meet the requirements of rapid and smooth switching in mechanical transmission systems, severely impacting the overall system's operational quality and stability. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art and provide a drive motor with multiple driving states.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drive motor, comprising a motor housing, an outer rotating shaft, an inner rotating shaft located within the outer rotating shaft, a stator mounted on the motor housing, and a rotor mounted on the outer rotating shaft. The motor housing includes a first end cover, a second end cover, and a cylindrical body connecting the first end cover and the second end cover. The second end cover is connected to a cylinder body, and the cylinder body has oil inlet and outlet holes. A piston unit is installed inside the cylinder body, and the piston unit is connected to a mounting ring. The mounting ring is connected to the inner rotating shaft via a bearing unit.

[0006] Furthermore, it also includes a hydraulic station, which is connected to the inlet and outlet oil ports via connecting pipes.

[0007] The piston unit can be driven by the hydraulic station, which in turn drives the translation of the inner rotating shaft.

[0008] Furthermore, the cylinder body has multiple strip-shaped heat dissipation grooves.

[0009] Furthermore, the outer rotating shaft includes two mounting positions, each mounting position having two internal threads and multiple strip-shaped grooves located between the two internal threads. A clamping unit is installed at each internal thread. The clamping unit includes a translation ring and an adjusting ring with external threads. Multiple clamping blocks embedded in the strip-shaped grooves are fixed at the translation ring. The clamping blocks have a first abutting surface. A first spring is located between the adjusting ring and the translation ring. The inner rotating shaft has two limiting parts, which correspond one-to-one with the two mounting positions. The limiting part includes a cylindrical protrusion and multiple strip-shaped slide rails fixed to the protrusion and embedded in the strip-shaped grooves. Both ends of the strip-shaped slide rails have a second abutting surface.

[0010] Furthermore, the first contact surfaces of the multiple clamping blocks at the translation ring are located on the same frustum-shaped surface.

[0011] Furthermore, the second contact surfaces of the same end of the multiple strip rails at the protrusion are located on the same frustum-shaped surface.

[0012] Furthermore, the first spring is located between the adjusting ring and the translation ring, with one end of the first spring abutting against but not connected to the adjusting ring, and the other end of the first spring abutting against but not connected to the translation ring.

[0013] Therefore, when the adjusting ring is rotated by the adjusting unit, the first spring does not need to rotate with the adjusting ring; the first spring only needs to provide axial pressure.

[0014] Furthermore, the direction of the strip groove is consistent with the length direction of the outer rotating shaft.

[0015] Furthermore, the multiple strip grooves at each installation position are distributed in a ring with equal spacing.

[0016] Furthermore, the multiple strip rails at the protrusion are distributed in a ring with equal spacing.

[0017] Furthermore, the number of strip grooves at each mounting position is equal to the number of strip rails at each protrusion, and the two correspond one-to-one.

[0018] Furthermore, one end of the inner rotating shaft has a first annular cylindrical protrusion, and the other end has a second annular cylindrical protrusion. A frustum-shaped first driving block and a frustum-shaped second driving block are fixed at the first annular cylindrical protrusion.

[0019] Furthermore, the inner rotating shaft has a cylindrical central channel, one end of the inner rotating shaft is closed and the other end is open, the inner rotating shaft has multiple adjustment positions, the number of adjustment positions is equal to the number of adjustment rings and the two correspond one-to-one, the adjustment positions have multiple adjustment through holes, and the inner circumferential surface of the adjustment ring has multiple strip-shaped grooves.

[0020] Furthermore, each adjustment position has two adjustment through holes, and the multiple strip grooves at the adjustment ring are distributed in a ring with equal spacing.

[0021] Furthermore, each mounting position also has two rings of mounting holes, each ring having multiple mounting holes distributed in a ring at equal intervals. Each mounting hole has a first hole portion and a second hole portion communicating with the first hole portion. Each mounting hole is equipped with a pressing limiting unit, which includes a fixed block fixed in the first hole portion, a movable block connected to the fixed block by a second spring, and a pressing block connected to the movable block, inserted into the second hole portion, and capable of pressing against the adjusting ring.

[0022] Furthermore, the two mounting holes correspond one-to-one with the two internal threads.

[0023] The pressing block can press the adjusting ring against its external thread, thus making the position of the adjusting ring relative to the outer rotating shaft more stable. However, when the adjusting unit rotates the adjusting ring slightly, the adjusting ring can still shift relative to the pressing block.

[0024] Furthermore, each ring of mounting holes has four mounting holes distributed in a ring at equal intervals.

[0025] Furthermore, a third annular cylindrical protrusion is fixed at the inner rotating shaft between the two protrusions; the outer diameters of the first annular cylindrical protrusion, the second annular cylindrical protrusion, the third annular cylindrical protrusion, and the two protrusions are all equal.

[0026] Furthermore, the outer diameter of the first annular cylindrical protrusion is equal to the inner diameter of the outer rotating shaft.

[0027] Furthermore, a first bearing housing is fixed at the first end cover, and a first bearing is installed between the first bearing housing and the outer rotating shaft; a second bearing housing is fixed at the second end cover, and a second bearing is installed between the second bearing housing and the outer rotating shaft.

[0028] Furthermore, it also includes an adjustment unit, which includes an insertion rod that can be inserted into the central channel and two actuating blocks that are hinged to the insertion rod by elastic reset hinge components. When there is no external force, the actuating blocks are perpendicular to the insertion rod; the actuating blocks can pass through the adjustment through hole and be inserted into the strip groove.

[0029] Furthermore, it also includes a fixing frame, a first fixing ring fixed to the fixing frame, a first rotating ring connected to the first fixing ring via a third bearing, a first gear fixed to the first rotating ring, a second fixing ring fixed to the fixing frame, a second rotating ring connected to the second fixing ring via a fourth bearing, and a second gear fixed to the second rotating ring. The first rotating ring has a first frustoconical groove capable of abutting against the first driving block, and the second rotating ring has a second frustoconical groove capable of abutting against the second driving block.

[0030] Furthermore, the drive motor can be in a first state and a second state. In the first state, the second abutting surface of each strip slide rail near the first end cover abuts against the corresponding first abutting surface. In the second state, the second abutting surface of each strip slide rail near the second end cover abuts against the corresponding first abutting surface.

[0031] Furthermore, in the first state, the first driving block abuts against the first frustoconical groove; in the second state, the second driving block abuts against the second frustoconical groove.

[0032] Furthermore, the drive motor can also be in a third state, in which the first drive block does not abut against the first frustum-shaped groove, and the second drive block does not abut against the second frustum-shaped groove.

[0033] Furthermore, in the third state, neither of the two second contact surfaces of each strip rail abuts against the first contact surface.

[0034] Therefore, the drive motor does not drive either the first rotating ring or the second rotating ring.

[0035] Beneficial effects:

[0036] 1. In the drive motor of this application, the inner rotating shaft can be integrated into the outer rotating shaft, and the translation of the inner rotating shaft is realized through a hydraulic system, thereby realizing the switching between the two states.

[0037] 2. The drive motor of this application has high transmission stability, high device integration, and small space occupation. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the drive motor;

[0039] Figure 2 This is a schematic diagram of the third state cross-section;

[0040] Figure 3 This is a magnified view of region A;

[0041] Figure 4 This is a magnified view of region B.

[0042] Figure 5 This is a schematic diagram of the first state cross-section;

[0043] Figure 6 This is a magnified view of region C;

[0044] Figure 7 This is a magnified view of region D;

[0045] Figure 8 This is a schematic diagram of the second state cross-section;

[0046] Figure 9 This is a magnified view of region E.

[0047] Figure 10 A schematic diagram showing the adjustment unit rotating the adjustment ring;

[0048] Figure 11 This is a magnified view of region F;

[0049] Figure 12 This is a schematic diagram showing the separation of the drive motor components;

[0050] Figure 13 This is a magnified view of region G;

[0051] Figure 14 This is a magnified view of region H;

[0052] Figure 15 This is a magnified view of region I.

[0053] Explanation of reference numerals in the attached drawings: First end cap 1.1; Second end cap 1.2; Cylinder body 1.3; First bearing seat 1.4; First bearing 1.5; Second bearing seat 1.6; Second bearing 1.7; Outer rotating shaft 2; Mounting hole 2.1; Inner rotating shaft 3; First annular cylindrical protrusion 3.1; Second annular cylindrical protrusion 3.2; First drive block 3.3; Second drive block 3.4; Central channel 3.5; Adjusting through hole 3.6; Third annular cylindrical protrusion 3.7; Cylinder body 4; Oil inlet / outlet hole 4.1; Piston unit 4.2; Mounting ring 4.3; Bearing unit 4.4; Translation ring 5.1; Adjusting ring 5.2; Clamping block 5.3; First abutting surface 5.4; First spring 5.5; Strip groove 5.6; Protrusion 6.1; Strip slide rail 6.2; Second abutting surface 6.3; Fixing block 7.1; Second spring 7.2; Movable block 7.3; Pressing block 7.4; Insert rod 8.1; Actuating block 8.2; First fixing ring 9.1; Third bearing 9.2; First rotating ring 9.3; First frustum-shaped groove 9.3.1; First gear 9.4; Second fixing ring 9.5; Fourth bearing 9.6; Second rotating ring 9.7; Second frustum-shaped groove 9.7.1; Second gear 9.8. Detailed Implementation

[0054] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0055] This invention provides a drive motor with multiple driving states, as shown in the figure, including a motor housing, an outer shaft 2, an inner shaft 3 located inside the outer shaft 2, a stator (not shown in the figure) mounted on the motor housing, and a rotor (not shown in the figure) mounted on the outer shaft 2. The motor housing includes a first end cover 1.1, a second end cover 1.2, and a cylindrical body 1.3 connecting the first end cover 1.1 and the second end cover 1.2. The second end cover 1.2 is connected to a cylinder 4, and the cylinder 4 has an oil inlet / outlet hole 4.1. A piston unit 4.2 is installed inside the cylinder 4, and the piston unit 4.2 is connected to a mounting ring 4.3. The mounting ring 4.3 is connected to the inner shaft 3 through a bearing unit 4.4. The outer rotating shaft 2 includes two mounting positions, each mounting position having two internal threads and multiple strip-shaped grooves located between the two internal threads. Each internal thread is equipped with a clamping unit, the clamping unit including a translation ring 5.1 and an adjusting ring 5.2 with external threads. Multiple clamping blocks 5.3 embedded in the strip-shaped grooves are fixed at the translation ring 5.1. The clamping blocks 5.3 have a first abutting surface 5.4. A first spring 5.5 is located between the adjusting ring 5.2 and the translation ring 5.1. The inner rotating shaft 3 has two limiting parts, each corresponding to one of the two mounting positions. Each limiting part includes a cylindrical protrusion 6.1 and multiple strip-shaped slide rails 6.2 fixed to the protrusion 6.1 and embedded in the strip-shaped grooves. Both ends of the strip-shaped slide rails 6.2 have a second abutting surface 6.3. One end of the inner rotating shaft 3 has a first annular cylindrical protrusion 3.1, and the other end has a second annular cylindrical protrusion 3.2. A frustoconical first driving block 3.3 and a frustoconical second driving block 3.4 are fixed at the first annular cylindrical protrusion 3.1. The inner rotating shaft 3 has a cylindrical central channel 3.5, one end of the inner rotating shaft 3 is closed, and the other end is open. The inner rotating shaft 3 has multiple adjustment positions, the number of which is equal to the number of adjustment rings 5.2 and they correspond one-to-one. Each adjustment position has multiple adjustment through holes 3.6, and the inner circumferential surface of the adjustment ring 5.2 has multiple strip-shaped grooves 5.6. Each adjustment position has two adjustment through holes 3.6, and the multiple strip-shaped grooves on the adjustment ring 5.2 are distributed in a ring with equal spacing. Each mounting position also has two rings of mounting holes, each ring having multiple mounting holes 2.1 distributed in a ring at equal intervals. Each mounting hole 2.1 has a first hole portion and a second hole portion communicating with the first hole portion. Each mounting hole 2.1 is equipped with a pressing limiting unit. The pressing limiting unit includes a fixing block 7.1 fixed in the first hole portion, a movable block 7.3 connected to the fixing block 7.1 by a second spring 7.2, and a pressing block 7.4 connected to the movable block 7.3, inserted into the second hole portion, and able to press against the adjusting ring 5.2.A third annular cylindrical protrusion 3.7 is fixed at the inner rotating shaft 3, located between the two protrusions 6.1; the outer diameters of the first annular cylindrical protrusion 3.1, the second annular cylindrical protrusion 3.2, the third annular cylindrical protrusion 3.7, and the two protrusions 6.1 are all equal; the outer diameter of the first annular cylindrical protrusion 3.1 is equal to the inner diameter of the outer rotating shaft 2. A first bearing seat 1.4 is fixed at the first end cover 1.1, and a first bearing 1.5 is installed between the first bearing seat 1.4 and the outer rotating shaft 2. A second bearing seat 1.6 is fixed at the second end cover 1.2, and a second bearing 1.7 is installed between the second bearing seat 1.6 and the outer rotating shaft 2.

[0056] The drive motor also includes an adjustment unit, which includes an insertion rod 8.1 that can be inserted into the central channel 3.5 and two actuating blocks 8.2 that are hinged to the insertion rod 8.1 by elastic reset hinge components. When there is no external force, the actuating blocks 8.2 are perpendicular to the insertion rod 8.1. The actuating blocks 8.2 can pass through the adjustment through hole 3.6 and be inserted into the strip groove 5.6. The drive motor further includes a mounting bracket (not shown in the figure), a first fixing ring 9.1 fixed to the mounting bracket, a first rotating ring 9.3 connected to the first fixing ring 9.1 via a third bearing 9.2, a first gear 9.4 fixed to the first rotating ring 9.3, a second fixing ring 9.5 fixed to the mounting bracket, a second rotating ring 9.7 connected to the second fixing ring 9.5 via a fourth bearing 9.6, and a second gear 9.8 fixed to the second rotating ring 9.7. The first rotating ring 9.3 has a first frustoconical groove 9.3.1 capable of abutting the first drive block 3.3, and the second rotating ring 9.7 has a second frustoconical groove 9.7.1 capable of abutting the second drive block 3.4. The drive motor can be in a first state and a second state. In the first state, each strip slide rail 6.2 abuts against the corresponding first abutting surface 5.4 near the second abutting surface 6.3 of the first end cover 1.1, and the first drive block 3.3 abuts against the first frustoconical groove 9.3.1. In the second state, each strip slide rail 6.2 abuts against the corresponding first abutting surface 5.4 near the second end cover 1.2, and the second drive block 3.4 abuts against the second frustoconical groove 9.7.1.

[0057] Working principle: As shown in the figure, the drive motor of this application has an inner rotating shaft inserted inside an outer rotating shaft. Under the drive of a piston, the inner rotating shaft can translate relative to the outer rotating shaft, thereby allowing the drive motor to be in a first state. In this state, the first drive block drives the first rotating ring, and the first gear at the first rotating ring can drive other components. Alternatively, the drive motor can be in a second state, where the second drive block drives the second rotating ring, and the second gear at the second rotating ring can drive other components. Finally, the drive motor can be in a third state, where it does not drive either the first or second rotating ring.

[0058] Furthermore, the inner and outer rotating shafts can achieve synchronous rotation through the limiting cooperation of strip-shaped sliding grooves and strip-shaped sliding rails. To further enhance synchronization, in both the first and second states, each strip-shaped sliding rail has a first abutting surface that abuts against a corresponding clamping block. This allows multiple strip-shaped sliding rails and clamping blocks to act similarly to two frustum-shaped surfaces abutting against each other, resulting in better synchronization. Since the outer rotating shaft has two mounting positions, the inner rotating shaft, in both the first and second states, also achieves the effect of two frustum-shaped surfaces abutting against each other at both mounting positions, further improving the synchronization effect.

[0059] Furthermore, the adjusting ring and the outer rotating shaft are fixed by threads, and under the action of the pressing block, the position between the adjusting ring and the outer rotating shaft can be better locked, thus making the position of the adjusting ring more stable. This application also has an adjusting unit, so when the position of the adjusting ring needs to be adjusted, simply insert the insertion rod into the inner rotating shaft (at this time, the actuating block will tilt towards the insertion rod due to the abutment limit of the central channel sidewall). After reaching the adjusting through hole, the actuating block will reset and embed into the strip groove, allowing the adjusting ring to rotate. Generally, this adjustment only requires a very small rotation. If a larger rotation is required, the adjusting ring can be rotated to allow the actuating block to exit the adjusting through hole, and then inserted back into the adjusting through hole (at this time, the actuating block will insert into another strip groove), allowing for another small rotation of the adjusting ring. Therefore, when the strip slide rail and the clamping block are not sufficiently abutted, the position of the adjusting ring can be adjusted, ensuring a good abutment between the strip slide rail and the clamping block.

[0060] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. A drive motor having multiple driving states, characterized in that, The device includes a motor housing, an outer shaft, an inner shaft located inside the outer shaft, a stator mounted on the motor housing, and a rotor mounted on the outer shaft. The motor housing includes a first end cover, a second end cover, and a cylindrical body connecting the first end cover and the second end cover. The second end cover is connected to a cylinder body, which has oil inlet and outlet holes. A piston unit is installed inside the cylinder body, and the piston unit is connected to a mounting ring. The mounting ring and the inner shaft are connected through a bearing unit. The outer rotating shaft includes two mounting positions, each mounting position having two internal threads and multiple strip-shaped grooves located between the two internal threads. A clamping unit is installed at each internal thread. The clamping unit includes a translation ring and an adjusting ring with external threads. Multiple clamping blocks embedded in the strip-shaped grooves are fixed at the translation ring. The clamping blocks have a first abutting surface. A first spring is located between the adjusting ring and the translation ring. The inner rotating shaft has two limiting parts, which correspond one-to-one with the two mounting positions. Each limiting part includes a cylindrical protrusion and multiple strip-shaped slide rails fixed to the protrusion and embedded in the strip-shaped grooves. Both ends of the strip-shaped slide rails have a second abutting surface. One end of the inner rotating shaft has a first annular cylindrical protrusion and the other end has a second annular cylindrical protrusion. A frustum-shaped first driving block and a frustum-shaped second driving block are fixed at the first annular cylindrical protrusion. The inner rotating shaft has a cylindrical central channel, one end of the inner rotating shaft is closed and the other end is open. The inner rotating shaft has multiple adjustment positions, the number of adjustment positions is equal to the number of adjustment rings and the two correspond one-to-one. The adjustment positions have multiple adjustment through holes, and the inner circumferential surface of the adjustment ring has multiple strip-shaped grooves.

2. The drive motor with multiple driving states according to claim 1, characterized in that, Each adjustment position has two adjustment through holes, and the multiple strip grooves on the adjustment ring are distributed in a ring with equal spacing.

3. The drive motor with multiple driving states according to claim 1, characterized in that, Each mounting position also has two rings of mounting holes, each ring having multiple mounting holes distributed in a ring at equal intervals. Each mounting hole has a first hole portion and a second hole portion communicating with the first hole portion. Each mounting hole is equipped with a pressing limiting unit. The pressing limiting unit includes a fixed block fixed in the first hole portion, a movable block connected to the fixed block by a second spring, and a pressing block connected to the movable block, inserted into the second hole portion, and capable of pressing against the adjusting ring.

4. The drive motor with multiple driving states according to claim 1, characterized in that, The inner rotating shaft is also fixed with a third annular cylindrical protrusion located between the two protrusions; the outer diameters of the first annular cylindrical protrusion, the second annular cylindrical protrusion, the third annular cylindrical protrusion, and the two protrusions are all equal; the outer diameter of the first annular cylindrical protrusion is equal to the inner diameter of the outer rotating shaft.

5. The drive motor with multiple driving states according to claim 1, characterized in that, A first bearing housing is fixed at the first end cover, and a first bearing is installed between the first bearing housing and the outer rotating shaft. A second bearing housing is fixed at the second end cover, and a second bearing is installed between the second bearing housing and the outer rotating shaft.

6. The drive motor with multiple driving states according to claim 1, characterized in that, It also includes an adjustment unit, which includes an insertion rod that can be inserted into the central channel and two actuating blocks that are hinged to the insertion rod by elastic reset hinge components. When there is no external force, the actuating blocks are perpendicular to the insertion rod; the actuating blocks can pass through the adjustment through hole and be inserted into the strip groove.

7. The drive motor with multiple driving states according to claim 1, characterized in that, It also includes a fixing frame, a first fixing ring fixed to the fixing frame, a first rotating ring connected to the first fixing ring via a third bearing, a first gear fixed to the first rotating ring, a second fixing ring fixed to the fixing frame, a second rotating ring connected to the second fixing ring via a fourth bearing, and a second gear fixed to the second rotating ring. The first rotating ring has a first frustoconical groove that can abut against the first driving block, and the second rotating ring has a second frustoconical groove that can abut against the second driving block.

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