CN212429690U - Worm gear speed reducing motor with balanced forward and reverse rotation output torque - Google Patents

Abstract

The application relates to a worm gear speed reducing motor with balanced forward and reverse output torque, which comprises a motor and a reduction gearbox, wherein the motor comprises a shell and a rotating shaft arranged in the shell; the worm and gear speed reducing mechanism comprises a worm sleeve arranged in the shell and a speed reducing worm gear which is rotatably connected in the shell and is meshed with the worm sleeve; a limiting seat is fixedly arranged in the shell, and a positioning blind hole is formed in one side of the limiting seat; one end of the rotating shaft penetrates through the side wall of the shell, extends into the positioning blind hole and is in rotating fit with the positioning blind hole; the worm sleeve is fixedly sleeved on the rotating shaft. The worm gear speed reducing motor has the advantages that the limiting seat is matched with the non-extending end of the shell to limit the rotating shaft, so that the output torque of the worm gear speed reducing motor in the forward rotation is the same as or very small in difference with the output torque of the worm gear speed reducing motor in the reverse rotation; and when the motor is locked, the forward rotation starting voltage of the motor is consistent with the reverse rotation starting voltage of the motor.

Description

Worm gear speed reducing motor with balanced forward and reverse rotation output torque

Technical Field

The application relates to the field of speed reducing motors, in particular to a worm gear speed reducing motor with balanced forward and reverse output torques.

Background

The worm gear speed reducer is an integrated body of the worm gear speed reducer and the motor; the worm gear and worm speed reducer is a power transmission mechanism, which at least comprises a group of worm gears and worms meshed with each other.

At present, in a certain part of worm gears in the worm gear speed reducer on the market are directly connected with a rotating shaft of a motor, in the worm gear speed reducer, when the rotating shaft of the motor rotates forwards and backwards, the rotating shaft of the motor can be subjected to axial forces in different directions and generates axial displacement under the action of the axial force, so that the rotating shaft of the motor is abutted against a non-extending end cover of a motor shell or a limiting piece on the rotating shaft of the motor is abutted against an extending end cover (or a front end bearing) of the motor shell.

In view of the above-mentioned related art, the inventor believes that there is a defect that the output torque in the normal rotation of the worm gear reduction motor is greatly different from the output torque in the reverse rotation.

SUMMERY OF THE UTILITY MODEL

In order to reduce the difference between the output torque in the forward rotation and the output torque in the reverse rotation of the worm gear speed reducing motor, the application provides the worm gear speed reducing motor with balanced forward and reverse rotation output torques.

The application provides a worm gear reducing motor that just reverses output torque is balanced adopts following technical scheme:

a worm gear speed reducing motor with balanced forward and reverse output torque comprises a motor and a speed reducing box, wherein the motor comprises a shell and a rotating shaft arranged in the shell, the speed reducing box comprises a shell, an output shaft and a worm gear speed reducing mechanism arranged in the shell, and the worm gear speed reducing mechanism is in transmission connection with the output shaft;

the worm and gear speed reducing mechanism comprises a worm sleeve arranged in the shell and a speed reducing worm gear which is rotatably connected in the shell and is meshed with the worm sleeve; a limiting seat is fixedly arranged in the shell, and a positioning blind hole is formed in one side of the limiting seat; one end of the rotating shaft penetrates through the side wall of the shell, extends into the positioning blind hole and is in running fit with the positioning blind hole; the worm sleeve is fixedly sleeved on the rotating shaft.

By adopting the technical scheme, when the rotating shaft rotates forwards, the rotating shaft is abutted against the end cover of the non-extending end of the shell under the reaction force of the reduction worm gear; when the rotating shaft rotates reversely, the rotating shaft is abutted against the bottom of the positioning blind hole under the reaction force of the speed reduction worm wheel; because the areas of the end surfaces of the two ends of the rotating shaft are the same, the friction resistance on the end surfaces of the rotating shaft is the same when the rotating shaft rotates forwards and reversely, and the forward rotation starting voltage of the motor is consistent with the reverse rotation starting voltage of the motor after the motor is locked.

Preferably, one end of the rotating shaft, which extends into the positioning blind hole, is sleeved with a first bearing.

By adopting the technical scheme, the friction resistance of the rotating shaft during rotation can be effectively reduced, and the friction loss of the rotating shaft is also reduced.

Preferably, the bottom of the positioning blind hole is provided with a limiting gasket.

By adopting the technical scheme, the limiting gasket can reduce the friction loss of the shaft end of the rotating shaft and the friction loss of the limiting seat; in addition, the limiting gasket is used as a consumable, and is convenient to replace.

Preferably, one side of the limiting seat, which is back to the worm sleeve, is provided with a threaded hole communicated with the positioning blind hole, and a jackscrew is screwed in the threaded hole.

By adopting the technical scheme, after the worm sleeve and the reduction worm wheel are used for a period of time, a user can screw the jack screw into the positioning blind hole for a certain distance to make up the friction loss of the rotating shaft and the friction loss of the limiting gasket, so that the worm sleeve and the reduction worm wheel can be kept to operate under a better fit side clearance, and the best service life of the worm sleeve and the reduction worm wheel is expected to be achieved; and the service life of the limiting gasket is prolonged.

Preferably, the stop nut is screwed on the jackscrew, a U-shaped support piece is arranged on one side of the limiting seat, which is back to the worm sleeve, two ends of the U-shaped support piece are fixedly connected with the limiting seat, a through hole is formed in the middle of the U-shaped support piece, the jackscrew passes through the through hole, and the stop nut is located between the limiting seat and the U-shaped support piece.

Through adopting above-mentioned technical scheme, carry on spacingly to the jackscrew, reduce the jackscrew and hit the possibility that removes to keeping away from the pivot direction by the pivot top.

Preferably, the worm sleeve and the rotating shaft are integrally formed or welded.

By adopting the technical scheme, the processing is convenient, and the manufacturing cost is low.

Preferably, the motor further comprises a stator fixedly connected in the casing and a rotor arranged in the stator, and the rotating shaft penetrates through the rotor and is fixedly connected with the rotor; the one end inboard that the shell was kept away from to the casing is equipped with the installation blind hole, the hole bottom of installation blind hole is provided with the axle head gasket, the one end that the shell was kept away from in the pivot stretches into the installation blind hole and its cover is equipped with the second bearing.

By adopting the technical scheme, the second bearing can effectively reduce the friction resistance borne by the rotating shaft during rotation, and also reduce the friction loss of the rotating shaft; the shaft end gasket can reduce the friction loss of the shaft end of the rotating shaft; in addition, the shaft end gasket is used as a consumable material, so that the replacement is convenient.

Preferably, the housing comprises a housing body, a cover bolted to the housing body, and a cover bolted to the open side of the housing body.

Through adopting above-mentioned technical scheme, the manufacturing of the box of being convenient for and worm gear reduction motor's assembly.

Preferably, the gear speed reducing mechanism comprises a first-stage speed reducing shaft, a second-stage speed reducing shaft, a third-stage speed reducing shaft and a fourth-stage speed reducing shaft which are rotatably connected in the shell; the speed reducing worm wheel is fixed on the primary speed reducing shaft; a primary driving reduction gear is fixedly connected to the primary reduction shaft; a secondary driving reduction gear and a primary driven reduction gear meshed with the primary driving reduction gear are fixed on the secondary reduction shaft; a third-stage driving reduction gear and a second-stage driven reduction gear meshed with the second-stage driving reduction gear are fixed on the third-stage reduction shaft; a fourth-stage driving reduction gear and a third-stage driven reduction gear meshed with the third-stage driving reduction gear are fixed on the fourth-stage reduction shaft; and a four-stage driven reduction gear meshed with the four-stage driving reduction gear is fixed on the output shaft.

By adopting the technical scheme, the output rotating speed of the motor can be reduced in multiple stages.

In summary, the present application includes at least one of the following benefits:

1. the output torque of the worm gear speed reducing motor in the positive rotation is the same as or very small in difference with the output torque in the negative rotation;

2. the arrangement of the first bearing can effectively reduce the friction resistance borne by the rotating shaft during rotation and also reduce the friction loss of the rotating shaft;

3. the limiting gasket can reduce the friction loss of the shaft end of the rotating shaft and the friction loss of the limiting seat; in addition, the limiting gasket is used as a consumable material, so that the replacement is convenient;

4. after the worm sleeve and the reduction worm wheel are used for a period of time, a user can screw the jackscrew into the positioning blind hole for a certain distance to make up the friction loss of the rotating shaft and the friction loss of the limiting gasket, so that the worm sleeve and the reduction worm wheel can be kept to operate under a better fit side clearance, and the best service life of the worm sleeve and the reduction worm wheel is expected; and the service life of the limiting gasket is prolonged.

Drawings

Fig. 1 is a schematic structural view of a worm gear reduction motor according to a first embodiment of the present application.

Fig. 2 is an exploded view of the worm gear reduction motor according to the first embodiment of the present application.

Fig. 3 is a partially sectional view of a worm gear reduction motor according to a first embodiment of the present application.

Fig. 4 is a partial sectional view of a worm gear reduction motor according to a second embodiment of the present application.

Description of reference numerals: 1. a motor; 11. a housing; 12. a stator; 13. a rotor; 14. a rotating shaft; 15. installing blind holes; 16. a shaft end spacer; 17. a second bearing; 18. a third bearing; 19. a limiting member; 2. a housing; 21. a box body; 22. a box cover; 3. an output shaft; 4. a worm gear reduction mechanism; 41. a reduction worm gear; 42. a worm sleeve; 43. a limiting seat; 431. positioning the blind hole; 432. a threaded hole; 44. a limiting gasket; 45. a first bearing; 46. carrying out top thread; 47. a U-shaped support member; 48. a non-return nut; 5. a gear reduction mechanism; 51. a primary reduction shaft; 52. a secondary reduction shaft; 53. a third-stage reduction shaft; 54. a four-stage reduction shaft; 55. a primary active reduction gear; 56. a primary passive reduction gear; 57. a secondary active reduction gear; 58. a secondary driven reduction gear; 59. a three-stage active reduction gear; 60. a three-stage passive reduction gear; 61. a four-stage active reduction gear; 62. four-stage passive reduction gear.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a worm gear speed reducing motor 1 with balanced forward and reverse rotation output torques.

The first embodiment is as follows:

referring to fig. 1, a worm gear reduction motor 1 includes a motor 1 and a reduction gear box.

Referring to fig. 2, the motor 1 includes a housing 11, a stator 12 fixedly connected in the housing 11, a rotor 13 disposed in the stator 12, and a rotating shaft 14 penetrating the rotor 13 and fixedly connected to the rotor 13, wherein one end of the rotating shaft 14 extends out of the housing 11, and it is noted that both ends of the rotating shaft 14 are chamfered, and the areas of the end surfaces of both ends of the rotating shaft 14 are the same. A blind mounting hole 15 is formed in the inner side of the non-extending end of the housing 11, a shaft end gasket 16 is arranged at the bottom of the blind mounting hole 15, and a second bearing 17 is sleeved on one end of the rotating shaft 14, which is positioned in the housing 11, and extends into the blind mounting hole 15. A third bearing 18 is connected between the extended end of the casing 11 and the rotating shaft 14, and a limiting member 19 is further fixedly connected to the rotating shaft 14, in this embodiment, the limiting member 19 is a limiting ring integrally formed on the rotating shaft 14, the limiting ring is located between the rotor 13 and the third bearing 18, and a gap is left between the limiting ring and the third bearing 18.

The provision of the second bearing 17 and the third bearing 18 can greatly reduce the frictional resistance to which the shaft 14 is subjected during rotation. The shaft end gasket 16 is made of brass, and the texture of the shaft end gasket is relatively soft, so that a better buffering effect can be achieved, and the friction loss of the rotating shaft 14 can be reduced; and the shaft end spacer 16 is a consumable that the user can replace when it is worn more.

Referring to fig. 3, the reduction gearbox includes a housing 2, an output shaft 3, and a worm gear reduction mechanism and a gear reduction mechanism 5 disposed within the housing 2. The housing 2 includes a case 21 and a cover 22, the case 21 is provided with an opening, and the cover 22 covers the opening and is bolted to the case 21. One end of the output shaft 3 is rotatably connected to the bottom of the inner side of the box body 21, and the other end thereof penetrates through the box cover 22 and is rotatably connected with the box cover 22.

The gear reduction mechanism 5 comprises a four-stage reduction shaft 54, a three-stage reduction shaft 53, a two-stage reduction shaft 52 and a one-stage reduction shaft 51 which are rotatably connected between the box body 21 and the box cover 22 along the direction gradually far away from the output shaft 3, and a one-stage driving reduction gear 55 is fixedly connected on the one-stage reduction shaft 51; a secondary driving reduction gear 57 and a primary driven reduction gear 56 meshed with the primary driving reduction gear 55 are fixed on the secondary reduction shaft 52; a third-stage driving reduction gear 59 and a second-stage driven reduction gear 58 meshed with the second-stage driving reduction gear 57 are fixed on the third-stage reduction shaft 53; a fourth-stage driving reduction gear 61 and a third-stage driven reduction gear 60 meshed with the third-stage driving reduction gear 59 are fixed on the fourth-stage reduction shaft 54; a fourth-stage driven reduction gear 62 that meshes with the fourth-stage drive reduction gear 61 is fixed to the output shaft 3.

Referring to fig. 2 and 3, a shaft hole is formed in an end surface of the casing 21 near the primary speed reducing shaft 51, and the rotating shaft 14 extends into the casing 21 through the shaft hole. The worm and gear speed reducing mechanism comprises a speed reducing worm wheel 41 fixedly sleeved on the primary speed reducing shaft 51 and a worm sleeve 42 sleeved on one end of the rotating shaft 14 extending into the box body 21 and meshed with the speed reducing worm wheel 41, wherein the worm sleeve 42 is welded or integrally formed or in key connection with the rotating shaft 14, and the embodiment takes welding as an example.

A limiting seat 43 is fixedly connected to the bottom of the inner side of the box body 21, a positioning blind hole 431 is formed in one side, facing the rotating shaft 14, of the limiting seat 43, a limiting gasket 44 is arranged at the hole bottom of the positioning blind hole 431, and one end, located in the box body 21, of the rotating shaft 14 extends into the positioning blind hole 431 and is provided with a first bearing 45; it should be noted that when the shaft 14 abuts against the shaft end pad 16, the gap between the limiting member 19 and the third bearing 18 is larger than the gap between the shaft 14 and the limiting pad 44. The first bearing 45 is provided to greatly reduce the frictional resistance to which the rotary shaft 14 is subjected during rotation. The limiting gasket 44 is made of brass, and is relatively soft in texture, so that a better buffering effect can be achieved, and the friction loss of the rotating shaft 14 can be reduced; and the spacing washer 44 is a consumable item that the user can replace when it is worn more.

The implementation principle of the first embodiment is as follows: when the rotation shaft 14 rotates forward, the rotation shaft 14 is brought into contact with the shaft end spacer 16 by the reaction force of the reduction worm wheel 41. When the rotation shaft 14 rotates reversely, the rotation shaft 14 is abutted against the limit spacer 44 by the reaction force of the reduction worm wheel 41, and the limit member 19 is not in contact with the third bearing 18. Because the areas of the end surfaces of the two ends of the rotating shaft 14 are the same, when the rotating shaft 14 rotates forwards and reversely, the friction resistance on the end surfaces of the rotating shaft 14 is the same, so that the output torque of the worm gear speed reducing motor 1 in forward rotation is the same as or slightly different from the output torque of the worm gear speed reducing motor in reverse rotation.

Example two:

referring to fig. 4, the present embodiment is different from the first embodiment in that a threaded hole 432 communicating with the positioning blind hole 431 is formed in a side of the stopper seat 43 facing away from the worm housing 42, and a jack screw 46 screwed into the threaded hole 432 is screwed into the threaded hole 432. In addition, a U-shaped support member 47 is disposed on a side of the limiting seat 43 opposite to the worm bushing 42, two ends of the U-shaped support member 47 are welded to the limiting seat 43, a through hole is formed in the middle of the U-shaped support member 47, and the jackscrew 46 passes through the through hole. A retaining nut 48 is further screwed to the jack screw 46, and the retaining nut 48 abuts against a side of the middle of the U-shaped support 47 facing the stopper seat 43.

With the use of the worm gear reducer motor 1, the positioning blind hole 431 will become deeper gradually due to abrasion, and the limiting gasket 44 will become thinner gradually due to abrasion, and finally the rotating shaft 14 will be larger in axial movable amount during operation, so that the worm gear reducer motor 1 will generate larger noise when changing the rotating direction, and the loss of the reduction worm wheel 41 and the worm sleeve 42 will be aggravated. Accordingly, if the wear amount of the limiting pad 44 is too large, the positioning blind hole 431 becomes deeper, which may cause the situation that the limiting member 19 directly contacts with the third bearing 18 when the rotating shaft 14 rotates reversely; so that the friction force borne by the rotating shaft 14 in the forward rotation process is smaller than the friction force borne by the motor 1 in the reverse rotation process; finally, the output torque of the worm gear speed reducing motor 1 in the positive rotation and the output torque in the negative rotation are greatly different.

The implementation principle of the embodiment 2 is as follows: after the worm gear reducer motor 1 is used for a period of time, a user can screw the jackscrew 46 into the positioning blind hole 431 for a certain distance to compensate for friction loss of the rotating shaft 14, the limiting gasket 44 and the positioning blind hole 431, so that the limiting piece 19 and the third bearing 18 are not direct when the rotating shaft 14 rotates reversely, and the output torque of the worm gear reducer motor 1 in the forward rotation state and the output torque of the worm gear reducer motor in the reverse rotation state are kept in the same state or the state with little difference; in addition, the service life of the limiting gasket 44 can be prolonged and the maintenance cost can be reduced by adopting the mode.

In addition, the worm housing 42 and the reduction gear 41 can be kept operating with a better fit backlash by screwing the jackscrew 46, so as to achieve the best service life of the worm housing 42 and the reduction gear 41.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides a balanced worm gear reduction motor (1) of positive and negative rotation output torque, includes motor (1) and reducing gear box, motor (1) includes casing (11) and pivot (14) of installing in casing (11), characterized by: the reduction gearbox comprises a shell (2), an output shaft (3) and a worm and gear speed reducing mechanism arranged in the shell (2), and the worm and gear speed reducing mechanism is in transmission connection with the output shaft (3);

the worm and gear speed reducing mechanism comprises a worm sleeve (42) arranged in the shell (2) and a speed reducing worm wheel (41) which is rotatably connected in the shell (2) and is meshed with the worm sleeve (42); a limiting seat (43) is fixedly arranged in the shell (2), and a positioning blind hole (431) is formed in one side of the limiting seat (43); one end of the rotating shaft (14) penetrates through the side wall of the shell (2), extends into the positioning blind hole (431), and is in running fit with the positioning blind hole (431); the worm sleeve (42) is fixedly sleeved on the rotating shaft (14).

2. The worm gear reducer motor (1) for output torque balancing of positive and negative rotation as claimed in claim 1, characterized in that: one end of the rotating shaft (14) extending into the positioning blind hole (431) is sleeved with a first bearing (45).

3. The worm gear reducer motor (1) for output torque balancing of positive and negative rotation as claimed in claim 1, characterized in that: and a limiting gasket (44) is arranged at the bottom of the positioning blind hole (431).

4. The worm gear reducer motor (1) for output torque balancing of positive and negative rotation as claimed in claim 3, characterized in that: one side of the limiting seat (43), which is back to the worm sleeve (42), is provided with a threaded hole (432) communicated with the positioning blind hole (431), and a jackscrew (46) is screwed in the threaded hole (432).

5. The worm gear reducer motor (1) for output torque balancing of positive and negative rotation as claimed in claim 4, wherein: stop nut (48) has been twisted on jackscrew (46), one side of spacing seat (43) back to worm cover (42) is provided with U-shaped support piece (47), the both ends and spacing seat (43) fixed connection of U-shaped support piece (47), just the through-hole has been seted up in U-shaped support piece (47) middle part, jackscrew (46) warp the through-hole passes, stop nut (48) are located between spacing seat (43) and U-shaped support piece (47).

6. The worm gear reducer motor (1) for output torque balancing of positive and negative rotation as claimed in claim 1, characterized in that: the worm sleeve (42) and the rotating shaft (14) are integrally formed or welded.

7. The worm gear reducer motor (1) for output torque balancing of positive and negative rotation as claimed in claim 1, characterized in that: the motor (1) further comprises a stator (12) fixedly connected in the shell (11) and a rotor (13) arranged in the stator (12), and the rotating shaft (14) penetrates through the rotor (13) and is fixedly connected with the rotor (13); the one end inboard of shell (2) is kept away from in casing (11) is equipped with installation blind hole (15), the hole bottom of installation blind hole (15) is provided with axle head gasket (16), the one end that shell (2) were kept away from in pivot (14) stretches into installation blind hole (15) and its cover is equipped with second bearing (17).

8. The worm gear reducer motor (1) for output torque balancing of positive and negative rotation as claimed in claim 1, characterized in that: the shell (2) comprises a box body (21), a box cover (22) connected to the box body (21) through bolts and a box cover (22) connected to the opening side of the box body (21) through bolts, wherein the box cover (22) is arranged on the shell (2).

9. The worm gear reducer motor (1) for output torque balancing of positive and negative rotation as claimed in claim 1, characterized in that: the speed reducer is characterized by further comprising a gear speed reducing mechanism (5), wherein the gear speed reducing mechanism (5) comprises a first-stage speed reducing shaft (51), a second-stage speed reducing shaft (52), a third-stage speed reducing shaft (53) and a fourth-stage speed reducing shaft (54) which are rotatably connected in the shell (2); the reduction worm wheel (41) is fixed on the primary reduction shaft (51); a primary driving reduction gear (55) is fixedly connected to the primary reduction shaft (51); a secondary driving reduction gear (57) and a primary driven reduction gear (56) meshed with the primary driving reduction gear (55) are fixed on the secondary reduction shaft (52); a third-stage driving reduction gear (59) and a second-stage driven reduction gear (58) meshed with the second-stage driving reduction gear (57) are fixed on the third-stage reduction shaft (53); a four-stage driving reduction gear (61) and a three-stage driven reduction gear (60) meshed with the three-stage driving reduction gear (59) are fixed on the four-stage reduction shaft (54); a four-stage driven reduction gear (62) meshed with the four-stage driving reduction gear (61) is fixed on the output shaft (3).

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