Stable shockproof motor

Abstract

The invention belongs to the technical field of motors, and relates to a stable shockproof motor which comprises a motor body, a mounting seat and a connecting shaft, an inner cavity is formed in the mounting seat, an output shaft of the motor body extends into the inner cavity of the mounting seat and is connected with a locking part, and the locking part is positioned relative to the circumferential direction of the output shaft and can slide in the axial direction; one end of the connecting shaft is provided with a rotating part, the rotating part is rotatably arranged in an inner cavity of the mounting seat, the rotating part is provided with a plurality of wedge blocks, the locking part is provided with locking grooves clamped with the wedge blocks, the motor further comprises a buffer device, and the buffer device can apply thrust towards the rotating part to the locking part. When the output shaft stops rotating, the wedge block of the rotating part can slide on the inner wall of the locking groove of the locking part and generate thrust in the horizontal direction on the inner wall of the locking groove, so that the locking part moves relative to the rotating part, the thrust applied to the locking part by the buffering device can play a buffering role, vibration borne by the output shaft is reduced, and the service life of the output shaft is prolonged. The service life of the motor is prolonged.

Description

Technical Field

[0001] The present application belongs to the technical field of electric motors and relates to a stable and vibration-proof electric motor. Background Art

[0002] In actual application, the motor is often used together with the ball screw pair to drive the machine tool slide, which is one of the main driving forms of the machine tool slide. The most widely used motor is the three-phase asynchronous motor, which drives the ball screw pair to rotate and drives the machine tool slide to move. After the machine tool slide moves to the right position, the machine tool slide has a large inertia, so the output shaft of the three-phase asynchronous motor stops rotating. Due to the inertia of the machine tool slide, the output shaft of the three-phase asynchronous motor will be subjected to a large force at the moment of stopping rotation, which in turn causes the output shaft of the three-phase asynchronous motor to be subjected to a large vibration, which affects the service life of the three-phase asynchronous motor. Summary of the invention

[0003] In order to increase the service life of the motor, the present application provides a stable and vibration-proof motor.

[0004] The present application provides a stable and anti-vibration motor adopting the following technical solution: A stable and vibration-proof electric motor comprises a motor body, a mounting seat and a connecting shaft, wherein the mounting seat is provided with an inner cavity, the output shaft of the motor body extends into the inner cavity of the mounting seat and is connected with a locking portion, the locking portion is positioned circumferentially relative to the output shaft and is axially slidable; one end of the connecting shaft has a rotating portion, the rotating portion is rotatably arranged in the inner cavity of the mounting seat, the rotating portion is provided with a plurality of wedge blocks, the locking portion is provided with a locking groove engaged with the wedge blocks, and the motor further comprises a buffer device, which can apply a thrust toward the rotating portion to the locking portion.

[0005] By adopting the above technical solution, after the motor body is energized, the output shaft rotates. Since the buffer device can apply a thrust toward the rotating part to the locking part, the locking groove of the locking part and the wedge block of the rotating part are in a tightly engaged state. The output shaft drives the connecting shaft to rotate through the locking part and the rotating part. The connecting shaft can be connected to the ball screw pair to drive the ball screw pair to rotate, so that the machine tool slide can move; when the output shaft stops rotating, due to the inertia of the machine tool slide, the ball screw pair will still rotate slightly, so that the connecting shaft and the rotating part rotate, and the wedge block of the rotating part can slide on the inner wall of the locking groove of the locking part, and generate a horizontal thrust on the inner wall of the locking groove, so that the locking part produces a small movement relative to the rotating part. The thrust applied by the buffer device to the locking part can play a buffering role, reduce the vibration of the output shaft, and increase the service life of the motor. At the same time, it ensures that the wedge block will not detach from the locking groove, so that the motor can operate normally next time.

[0006] Preferably, the buffer device includes a connecting sleeve coaxially fixed on the locking part, and a sealing ring is provided at one end of the connecting sleeve close to the locking part. The sealing ring is fixedly connected to the locking part and forms a seal with the inner wall of the inner cavity of the mounting seat, and an end of the connecting sleeve away from the locking part is provided with a fixing ring. The fixing ring forms a seal with the inner wall of the inner cavity of the mounting seat. The inner cavity of the mounting seat, the outer wall of the connecting sleeve, and the sealing ring and the fixing ring are combined to form a closed liquid storage cavity, in which a fluid medium is stored.

[0007] By adopting the above technical scheme, the fluid medium in the liquid storage chamber can generate thrust on the sealing ring, so that when the wedge block is engaged in the locking groove, the wedge block is subjected to a greater extrusion force. When the output shaft drives the locking part to rotate, it can drive the rotating part to rotate relatively smoothly, so that the connecting shaft rotates; when the output shaft stops rotating, due to the inertia of the machine tool slide, the ball screw pair will rotate very slightly, and the connecting shaft and the rotating part will rotate synchronously, so that the inclined surface of the wedge block can slide on the inner wall of the locking groove, and generate horizontal thrust on the inner wall of the locking groove, so that the locking part rotates very slightly relative to the rotating part, and the sealing ring moves slightly. The liquid medium in the liquid storage chamber can generate hydraulic resistance for buffering, while preventing the wedge block from detaching from the locking groove.

[0008] Preferably, a braking device capable of applying a braking force to the connecting shaft is provided between the mounting seat and the connecting shaft.

[0009] By adopting the above technical solution, a braking force is applied to the connecting shaft through the braking device, so that the connecting shaft can be braked quickly, reducing the impact on the driving shaft and reducing the vibration of the driving shaft.

[0010] Preferably, the braking device includes a fixing sleeve coaxially sleeved on the connecting shaft, the fixing sleeve is fixed on the mounting seat, an end of the fixing sleeve away from the mounting seat is connected to an elastic clamping sleeve, the elastic clamping sleeve is sleeved on the connecting shaft, a clamping ring is provided on the inner side of the elastic clamping sleeve, the clamping ring is sleeved on the connecting shaft, and the inner diameter of the clamping ring is larger than the outer diameter of the connecting shaft, and the braking device also includes a retracting component capable of driving the elastic clamping sleeve to retract.

[0011] By adopting the above technical solution, when the motor is operating normally, no friction will be generated because the inner diameter of the clamping ring is larger than the outer diameter of the connecting shaft. When the output shaft stops rotating, the elastic clamping sleeve can be driven to close through the closing component, so that the clamping ring clamps the connecting shaft and braking is achieved through friction.

[0012] Preferably, the elastic clamping sleeve is provided with a through hole penetrating the fixing sleeve, the inner wall of the elastic clamping sleeve is provided with an annular mounting groove, the clamping ring is arranged in the annular mounting groove, and the side wall of the elastic clamping sleeve is provided with a plurality of strip slits, which separate the elastic clamping sleeve into a plurality of elastically deformable clamping claws.

[0013] By adopting the above technical solution, a strip-shaped slit is provided on the elastic clamping sleeve, so that the clamping claw can be deformed, and under the action of the interference component, the clamping ring can be driven to clamp the connecting shaft to play a braking role.

[0014] Preferably, the folding assembly includes a sliding sleeve, the outer diameter of the elastic clamping sleeve gradually increases in the direction away from the fixed sleeve, the sliding sleeve is movably arranged on the fixed sleeve, the inner side of the sliding sleeve has a tapered hole matching the outer side of the elastic clamping sleeve; the mounting seat is also fixed with a driving part, the driving part has a sliding cavity, the sliding cavity is connected with the liquid storage cavity, a piston is slidably arranged in the sliding cavity, a transmission assembly is arranged between the piston and the sliding sleeve, and the transmission assembly can convert the reciprocating sliding of the piston in the sliding cavity into the reciprocating sliding of the sliding sleeve along its own axial direction.

[0015] By adopting the above technical solution, at the moment when the output shaft stops rotating, due to the inertia of the machine tool slide, the ball screw pair produces a very small rotation, causing the connecting shaft and the rotating part to rotate, and the wedge block produces a horizontal thrust on the inner wall of the locking groove. In this process, the sealing ring can move slightly, squeezing the fluid in the liquid storage chamber, and the fluid produces a thrust on the piston, driving the sliding sleeve to slide through the transmission component, so that the sliding sleeve moves to the elastic clamping sleeve, and the elastic clamping sleeve is deformed through the tapered hole, driving the clamping ring to clamp the connecting shaft, thereby playing a braking role.

[0016] Preferably, the transmission assembly includes a connecting block, a driving rod, a floating block and a sliding rod, one end of the connecting block is connected to the sliding sleeve, the other end of the connecting block is connected to one end of the driving rod, the driving rod is arranged parallel to the connecting axis, the other end of the driving rod is connected to the floating block, the side wall of the floating block is provided with an inclined waist-shaped hole, one end of the sliding rod is provided with a sliding pin that slides with the waist-shaped hole, the floating block is provided with an avoidance groove for free movement of the end of the sliding rod, and the other end of the sliding rod passes through the driving part and is connected to the piston.

[0017] By adopting the above technical solution, the piston moves, driving the sliding rod to move. The sliding rod cooperates with the waist-shaped hole on the floating block through the sliding pin to push the floating block to move, so that the driving rod moves in a direction parallel to the connecting axis, driving the sliding sleeve to move, and causing the sliding sleeve to slide along the fixed sleeve and the elastic clamping sleeve, thereby playing the role of braking and releasing the brake.

[0018] Preferably, a fixing block is arranged on the outer side of the mounting seat, a guide hole is opened on the fixing block, the driving rod passes through the guide hole, and the two are slidably matched.

[0019] By adopting the above technical solution, a guide hole is provided, which can guide the movement of the driving rod and improve the stability of the movement of the driving rod.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. The thrust exerted by the buffer device on the locking part can play a buffering role, reduce the vibration of the output shaft, and increase the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0022] Figure 2 It is a cross-sectional view of an embodiment of the present application.

[0023] Figure 3 yes Figure 2 Enlarged view of part A.

[0024] Figure 4 It is a schematic diagram of the connection structure between the fixing sleeve and the elastic clamping sleeve in an embodiment of the present application.

[0025] Figure 5 It is a schematic diagram of the structure of the folding component of an embodiment of the present application.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. Motor body; 11. Output shaft; 12. Locking part; 121. Locking groove; 2. Mounting seat; 21. Inner cavity; 3. Connecting shaft; 31. Rotating part; 32. Wedge block; 4. Buffer device; 41. Connecting sleeve; 42. Sealing ring; 43. Fixed ring; 44. Liquid storage chamber; 5. Braking device; 51. Fixed sleeve; 52. Elastic clamping sleeve; 521. Strip seam; 522. Clamping claw; 53. Clamping ring; 6. Folding assembly; 61. Sliding sleeve; 611. Conical hole; 62. Driving part; 621. Sliding cavity; 63. Piston; 64. Connecting block; 65. Driving rod; 66. Floating block; 661. Waist-shaped hole; 662. Avoidance groove; 67. Sliding rod; 671. Sliding pin; 7. Fixed block. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-5 This application is described in further detail.

[0028] like Figure 1 , Figure 2 As shown, the electric motor includes a motor body 1 , a mounting seat 2 and a connecting shaft 3 .

[0029] like Figure 2, Figure 3 As shown, the mounting seat 2 is provided with an inner cavity 21 , the output shaft 11 of the motor body 1 extends into the inner cavity 21 of the mounting seat 2 and is connected with a locking portion 12 , which is positioned circumferentially relative to the output shaft 11 and is axially slidable.

[0030] In this embodiment, the locking portion 12 and the output shaft 11 can be matched through a keyway, and the output shaft 11 and the connecting shaft 3 are coaxially arranged and have the same outer diameter.

[0031] like Figure 2 , Figure 3 As shown, one end of the connecting shaft 3 has a rotating portion 31, and the rotating portion 31 is rotatably arranged in the inner cavity 21 of the mounting seat 2. The rotating portion 31 is provided with a plurality of wedge blocks 32. The surface of the wedge blocks 32 is provided with a chrome-plated layer to improve wear resistance. The locking portion 12 is provided with a locking groove 121 engaged with the wedge blocks 32, and the locking groove 121 also has an inclined surface to cooperate with the wedge blocks 32.

[0032] like Figure 2 , Figure 3 As shown, the motor further includes a buffer device 4 , which can apply a thrust to the locking portion 12 toward the rotating portion 31 .

[0033] like Figure 2 , Figure 3 As shown, in this embodiment, the buffer device 4 includes a connecting sleeve 41 coaxially fixed on the locking portion 12, and a sealing ring 42 is sleeved on one end of the connecting sleeve 41 close to the locking portion 12. The sealing ring 42 is fixedly connected to the locking portion 12 and forms a seal with the inner wall of the inner cavity 21 of the mounting seat 2. The end of the connecting sleeve 41 away from the locking portion 12 is sleeved with a fixing ring 43, and the fixing ring 43 forms a seal with the inner wall of the inner cavity 21 of the mounting seat 2. The inner cavity 21 of the mounting seat 2, the outer wall of the connecting sleeve 41, and the sealing ring 42 and the fixing ring 43 are combined to form a closed liquid storage chamber 44, and the liquid storage chamber 44 stores a fluid medium, and the fluid medium can be hydraulic oil or the like.

[0034] In order to realize the transmission between the driving shaft and the locking portion 12 , the connecting sleeve 41 and the driving shaft may be connected via a keyway.

[0035] like Figure 1 , Figure 3 As shown, a braking device 5 capable of applying braking force to the connecting shaft 3 is provided between the mounting seat 2 and the connecting shaft 3 .

[0036] In this embodiment, the braking device 5 includes a fixing sleeve 51 coaxially sleeved on the connecting shaft 3, the fixing sleeve 51 is fixed on the mounting seat 2, and an elastic clamping sleeve 52 is connected to one end of the fixing sleeve 51 away from the mounting seat 2. The elastic clamping sleeve 52 is made of spring steel and sleeved on the connecting shaft 3. A clamping ring 53 is arranged on the inner side of the elastic clamping sleeve 52, and the clamping ring 53 is sleeved on the connecting shaft 3, and the inner diameter of the clamping ring 53 is larger than the outer diameter of the connecting shaft 3. In this embodiment, the clamping ring 53 is made of rubber, and the inner diameter is slightly larger than the outer diameter of the connecting shaft 3.

[0037] like Figure 3 , Figure 4 As shown, the outer diameter of the elastic clamping sleeve 52 gradually increases in the direction away from the fixed sleeve 51, the elastic clamping sleeve 52 is provided with a through hole penetrating the fixed sleeve 51, the inner wall of the elastic clamping sleeve 52 is provided with an annular mounting groove, the clamping ring 53 is arranged in the annular mounting groove, and the side wall of the elastic clamping sleeve 52 is provided with a plurality of strip slits 521, preferably 4 in this embodiment, which separate the elastic clamping sleeve 52 into 4 elastically deformable clamping claws 522.

[0038] like Figure 3 As shown, the braking device 5 further comprises a retracting assembly 6 capable of driving the elastic clamping sleeve 52 to retract.

[0039] like Figure 3 , Figure 5 As shown, the folding assembly 6 includes a sliding sleeve 61, which is movably mounted on the fixed sleeve 51. The inner side of the sliding sleeve 61 has a tapered hole 611 that matches the outer side of the elastic clamping sleeve 52. The sliding sleeve 61 can move back and forth between the fixed sleeve 51 and the elastic clamping sleeve 52.

[0040] like Figure 3 , Figure 5 As shown, the mounting seat 2 is also fixed with a driving part 62, and the driving part 62 is arranged on the outside of the mounting seat 2. A sliding cavity 621 is opened in the driving part 62, and the sliding cavity 621 is connected with the liquid storage cavity 44. A piston 63 is slidably arranged in the sliding cavity 621, and a transmission component is arranged between the piston 63 and the sliding sleeve 61. The transmission component can convert the reciprocating sliding of the piston 63 in the sliding cavity 621 into the reciprocating sliding of the sliding sleeve 61 along its own axial direction.

[0041] In this embodiment, the transmission assembly includes a connecting block 64, a driving rod 65, a floating block 66 and a sliding rod 67. One end of the connecting block 64 is connected to the sliding sleeve 61, and the other end of the connecting block 64 is connected to one end of the driving rod 65. The driving rod 65 is arranged parallel to the connecting shaft 3. Preferably, a fixed block 7 is arranged on the outer side of the mounting seat 2, and a guide hole is provided on the fixed block 7. The driving rod 65 passes through the guide hole, and the two are slidably matched. The other end of the driving rod 65 is connected to the floating block 66. The side wall of the floating block 66 is provided with an inclined waist-shaped hole 661. One end of the sliding rod 67 is provided with a sliding pin that slides with the waist-shaped hole 661. The floating block 66 is provided with an avoidance groove 662 for free movement of the end of the sliding rod 67. The other end of the sliding rod 67 passes through the driving part 62 and is connected to the piston 63.

[0042] Preferably, two groups of transmission components are provided to improve the stability of the sliding sleeve 61 when it moves and to avoid the sliding sleeve 61 from getting stuck due to unilateral force.

[0043] As another solution, the transmission assembly can also be designed as a crank slider mechanism, with a slider designed on the outside of the mounting seat 2, one end of the crank connected to the sliding rod 67, the other end of the crank connected to the slider, and the slider connected to the connecting block 64. It can also realize the conversion of the movement of the piston 63 into the movement of the connecting block 64 to drive the sliding sleeve 61 to move.

[0044] The working principle of this embodiment is as follows: After the motor body 1 is powered on, the output shaft 11 rotates, and the fluid in the liquid storage chamber 44 can apply a thrust to the locking portion 12 toward the rotating portion 31, so that the locking groove 121 of the locking portion 12 and the wedge block 32 of the rotating portion 31 are in a tightly engaged state. The output shaft 11 drives the connecting shaft 3 to rotate through the locking portion 12 and the rotating portion 31. The connecting shaft 3 can be connected to the ball screw pair, driving the ball screw pair to rotate, so that the machine tool slide can move; When the output shaft 11 stops rotating, due to the inertia of the machine tool slide, the ball screw pair will still rotate slightly, causing the connecting shaft 3 and the rotating part 31 to rotate. The wedge block 32 of the rotating part 31 can slide on the inner wall of the locking groove 121 of the locking part 12, and generate a horizontal thrust on the inner wall of the locking groove 121. The sealing ring 42 can move slightly to squeeze the fluid in the liquid storage chamber 44, and the fluid can play a buffering role. At the same time, the fluid generates a thrust on the piston 63, and the piston 63 moves, driving the sliding rod 67 to move. The sliding rod 67 cooperates with the waist-shaped hole 661 on the floating block 66 through the sliding pin, pushing the floating block 66 to move, so that the driving rod 65 moves in a direction parallel to the connecting shaft 3, driving the sliding sleeve 61 to move from the fixed sleeve 51 to the elastic clamping sleeve 52, and the elastic clamping sleeve 52 is deformed through the tapered hole 611, and the clamping ring 53 is driven to clamp the connecting shaft 3 to play a braking role.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stable and vibration-proof motor, characterized in that: The motor comprises a motor body (1), a mounting seat (2) and a connecting shaft (3), wherein the mounting seat (2) is provided with an inner cavity (21), an output shaft (11) of the motor body (1) extends into the inner cavity (21) of the mounting seat (2) and is connected with a locking portion (12), wherein the locking portion (12) is positioned relative to the circumference of the output shaft (11) and is axially slidable; one end of the connecting shaft (3) comprises a rotating portion (31), wherein the rotating portion (31) is rotatably arranged in the inner cavity (21) of the mounting seat (2), wherein the rotating portion (31) is provided with a plurality of wedge blocks (32), wherein the locking portion (12) is provided with a locking groove (121) engaged with the wedge blocks (32), and the motor further comprises a buffer device (4), wherein the buffer device (4) is capable of applying a thrust to the locking portion (12) toward the rotating portion (31).

2. The stable and anti-vibration motor according to claim 1, characterized in that: The buffer device (4) comprises a connecting sleeve (41) coaxially fixed on the locking portion (12); a sealing ring (42) is sleeved on one end of the connecting sleeve (41) close to the locking portion (12); the sealing ring (42) is fixedly connected to the locking portion (12) and forms a seal with the inner wall of the inner cavity (21) of the mounting seat (2); a fixing ring (43) is sleeved on one end of the connecting sleeve (41) away from the locking portion (12); the fixing ring (43) forms a seal with the inner wall of the inner cavity (21) of the mounting seat (2); the inner cavity (21) of the mounting seat (2), the outer wall of the connecting sleeve (41), and the sealing ring (42) and the fixing ring (43) are combined to form a closed liquid storage cavity (44); a fluid medium is stored in the liquid storage cavity (44).

3. The stable and anti-vibration motor according to claim 2, characterized in that: A braking device (5) capable of applying a braking force to the connecting shaft (3) is provided between the mounting seat (2) and the connecting shaft (3).

4. The stable and anti-vibration motor according to claim 3, characterized in that: The braking device (5) comprises a fixing sleeve (51) coaxially sleeved on the connecting shaft (3), the fixing sleeve (51) being fixed on the mounting seat (2), the fixing sleeve (51) having one end away from the mounting seat (2) being connected to an elastic clamping sleeve (52), the elastic clamping sleeve (52) being sleeved on the connecting shaft (3), a clamping ring (53) being arranged on the inner side of the elastic clamping sleeve (52), the clamping ring (53) being sleeved on the connecting shaft (3), and the inner diameter of the clamping ring (53) being larger than the outer diameter of the connecting shaft (3), and the braking device (5) further comprises a retracting assembly (6) capable of driving the elastic clamping sleeve (52) to retract.

5. The stable and anti-vibration motor according to claim 4, characterized in that: The elastic clamping sleeve (52) is provided with a through hole penetrating the fixing sleeve (51); the inner wall of the elastic clamping sleeve (52) is provided with an annular mounting groove; the clamping ring (53) is arranged in the annular mounting groove; the side wall of the elastic clamping sleeve (52) is provided with a plurality of strip-shaped slits (521) for dividing the elastic clamping sleeve (52) into a plurality of elastically deformable clamping claws (522).

6. The stable and anti-vibration motor according to claim 5, characterized in that: The folding assembly (6) comprises a sliding sleeve (61), the outer diameter of the elastic clamping sleeve (52) gradually increases in the direction away from the fixed sleeve (51), the sliding sleeve (61) is movably mounted on the fixed sleeve (51), and the inner side of the sliding sleeve (61) has a tapered hole (611) that matches the outer side of the elastic clamping sleeve (52); the mounting seat (2) is also fixed with a driving part (62), a sliding cavity (621) is provided in the driving part (62), the sliding cavity (621) is connected with the liquid storage cavity (44), a piston (63) is slidably arranged in the sliding cavity (621), and a transmission assembly is arranged between the piston (63) and the sliding sleeve (61), and the transmission assembly can convert the reciprocating sliding of the piston (63) in the sliding cavity (621) into the reciprocating sliding of the sliding sleeve (61) along its own axial direction.

7. The stable and anti-vibration motor according to claim 6, characterized in that: The transmission assembly comprises a connecting block (64), a driving rod (65), a floating block (66) and a sliding rod (67). One end of the connecting block (64) is connected to the sliding sleeve (61), and the other end of the connecting block (64) is connected to one end of the driving rod (65). The driving rod (65) is arranged parallel to the connecting shaft (3), and the other end of the driving rod (65) is connected to the floating block (66). The side wall of the floating block (66) is provided with an inclined waist-shaped hole (661), and one end of the sliding rod (67) is provided with a sliding pin (671) that is slidably matched with the waist-shaped hole (661). The floating block (66) is provided with an avoidance groove (662) for the free movement of the end of the sliding rod (67). The other end of the sliding rod (67) passes through the driving part (62) and is connected to the piston (63).

8. The stable and anti-vibration motor according to claim 7, characterized in that: A fixing block (7) is arranged on the outer side of the mounting seat (2), a guide hole is opened on the fixing block (7), the driving rod (65) passes through the guide hole, and the two are slidably matched.

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