CN220134570U - Speed reducer for winch - Google Patents

Abstract

The utility model belongs to the technical field of mechanical transmission and provides a speed reducer for a winch, which comprises a driving shell, a primary transmission unit and a secondary transmission unit, wherein the primary transmission unit is arranged in a hollow cavity and comprises a first coupler and a primary planetary gear set, the first coupler is used for being in butt joint with a motor side coupler, the primary planetary gear set comprises a primary transmission shaft, a primary planetary gear and a primary planet carrier, one end of the primary transmission shaft is used for being in butt joint with the first coupler, the other end of the primary transmission shaft is provided with a primary sun gear, the primary planetary gear is rotatably arranged on a primary planet shaft and is in transmission engagement with the primary sun gear, and the secondary transmission unit comprises a secondary sun gear, a secondary planetary gear and a secondary planet carrier. The first-stage sun gear is integrated on the first-stage transmission shaft, and the connecting end of the first-stage transmission shaft is directly connected with the first coupler in a transmission manner, so that the number of transmission parts of the first-stage transmission unit can be reduced, and the transmission reliability of the speed reducer is improved.

Description

Speed reducer for winch

Technical Field

The utility model belongs to the technical field of mechanical transmission, and particularly relates to a speed reducer for a winch.

Background

The hoist is a small hoisting device, also called winch, for hoisting or pulling heavy objects by winding a wire rope or chain with a drum. The winch can vertically lift, horizontally or obliquely drag the heavy object, and is divided into an electric driving winch and a hydraulic winch according to different driving modes. The electric drive winch generally comprises a base body, a winding drum, a speed reducer, a motor and other components, and the output end of the speed reducer is connected with the winding drum by butting a half coupling at the input end of the speed reducer with a half coupling on the output shaft of the motor, so that the power is transmitted from the motor to the winding drum. The existing speed reducer for the winch is generally provided with an intermediate transition shaft between a first-stage sun gear shaft and a half coupling at the input end of the speed reducer, the complexity in the speed reducer is increased due to the design, and the intermediate transition shaft is easy to axially move, so that the manufacturing cost and the transmission failure rate are increased.

Disclosure of Invention

The utility model provides a speed reducer for a winch aiming at overcoming the defects and shortcomings, and aims to solve the technical problems that the existing speed reducer for the winch with an intermediate transition shaft is complex in internal structure and easy to cause transmission faults.

In order to achieve the above object, the utility model provides a speed reducer for a winch, the speed reducer comprises a driving shell, a primary transmission unit and a secondary transmission unit, wherein the driving shell is provided with a hollow cavity with an opening at the front end, the primary transmission unit is arranged in the hollow cavity and comprises a first coupler and a primary planetary gear set, the first coupler is arranged close to the opening at the front end and is used for being in butt joint with a motor side coupler, the primary planetary gear set comprises a primary transmission shaft, a primary planetary gear and a primary planetary carrier, the primary transmission shaft is arranged in an extending mode along the front-rear direction, one end of the primary transmission shaft is a connecting end used for being in butt joint with the first coupler, the other end of the primary transmission shaft is provided with a primary sun gear, a primary planetary carrier is sleeved on the primary transmission shaft in a gap mode and is provided with a first planetary shaft, the primary planetary gear is rotatably arranged on the primary planetary shaft and is in transmission engagement with outer side teeth of the primary sun gear, the secondary transmission unit comprises a secondary sun gear, a secondary planetary gear and a secondary planetary carrier, the secondary sun gear is coaxially sleeved on the primary transmission shaft and is fixedly connected with the primary carrier, one end of the secondary planetary gear is used for being installed for being in the secondary planetary gear carrier, and the secondary planetary gear is in butt joint with the primary carrier, the secondary transmission carrier is provided with the secondary planetary gear is in the transmission gear is meshed with the driving shell respectively.

In the embodiment of the utility model, the coaxial clearance sleeve of the secondary sun gear is arranged on the outer peripheral side of the primary transmission shaft and is arranged between the connecting end and the primary sun gear, the primary planet carrier is coaxially arranged on the outer peripheral side of the secondary sun gear and is fixedly connected with the secondary sun gear, and the diameter of the addendum circle of the primary sun gear is larger than that of the central hole of the secondary sun gear.

In the embodiment of the utility model, the speed reducer for the winch further comprises a first limiting check ring, wherein the first limiting check ring is fixedly arranged on the front end face of the gear teeth of the primary sun gear and is abutted with the rear end face of the secondary sun gear.

In the embodiment of the utility model, the driving shell comprises a rear end cover for sealing the rear end of the hollow cavity, and the rear end cover is provided with a wear-resistant stop block aligned with the primary transmission shaft in the front-rear direction, and the wear-resistant stop block is used for abutting against the rear end face of the primary sun gear.

In an embodiment of the utility model, the connection end is spline-fitted with the first coupling.

In the embodiment of the utility model, the secondary planet carrier is provided with a first penetrating cavity penetrating front and back, the inner wall of the first penetrating cavity is provided with a first limiting groove recessed radially, and the first coupling is arranged in the first penetrating cavity and is clamped and installed through the first bearing and the first limiting groove.

In the embodiment of the utility model, the inner wall of the first through cavity is also provided with a sealing end cover, the sealing end cover is arranged at the front part relative to the first limiting groove, the sealing end cover is provided with a second through cavity penetrating front and back, the inner wall of the second through cavity is provided with a second limiting groove recessed in the radial direction, and the first coupler is arranged in the second through cavity in a penetrating way and is clamped and installed through the second bearing and the second limiting groove.

In the embodiment of the utility model, the first limit groove is defined by a first flange radially protruding from the inner wall of the first through cavity and a second limit retainer ring detachably mounted on the inner wall of the first through cavity, and the second limit groove is defined by a second flange radially protruding from the inner wall of the second through cavity and a third limit retainer ring detachably mounted on the inner wall of the second through cavity.

In an embodiment of the utility model, a sealing gasket is further provided between the sealing end cap and the outer peripheral wall of the first coupling.

In the embodiment of the utility model, the driving shell is provided with a flange for connecting with a winding drum of the winding engine, and a third bearing is arranged between the driving shell and the peripheral wall of the secondary planet carrier.

Through the technical scheme, the speed reducer for the winch provided by the embodiment of the utility model has the following beneficial effects:

the motor side coupler is used for being in butt joint with an output shaft of the motor, the first coupler is used for being in butt joint with the first transmission shaft, the motor side coupler and the first coupler are two half couplers which are mutually matched for use, when power output by the motor output shaft is transmitted to the first transmission shaft through the motor side coupler and the first coupler, the power of the first transmission shaft is transmitted to the driving shell through the first planetary gear, the second sun gear and the second planetary gear in sequence, so that the driving shell rotates relative to the second planetary gear, and the speed reducer for the winch is convenient to connect with the motor shell.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide an understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and, together with the description, serve to explain the utility model. In the drawings:

fig. 1 is a schematic configuration view of a speed reducer for a hoist according to an embodiment of the present utility model.

Description of the reference numerals

1. First coupling of drive housing 21

22. Primary planetary gear set 221 primary transmission shaft

221a connecting end 221b primary sun gear

222. Primary planet 223 primary planet carrier

223a first planetary shaft 3 two-stage transmission unit

31. Second-stage sun gear 32 second-stage planet gear

33. Extension end of secondary planet carrier 331

332. First limiting groove of first through cavity 333

333a second limit retainer 334 seal end cover

335. Third limit check ring of second limit groove 335a

336. Axial positioning retainer ring for sealing washer 337

4. First spacing retaining ring 5 rear end cap

51. Wear-resistant stop 61 first bearing

62. Second bearing 63 third bearing

7. Motor side coupler 8 flange

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present utility model.

The speed reducer for a hoist of the present utility model is described below with reference to the accompanying drawings.

The present utility model provides a speed reducer for a winch, as shown in fig. 1, the speed reducer for a winch comprises:

a drive housing 1 provided with a hollow cavity with an opening at the front end;

the primary transmission unit is arranged in the hollow cavity and comprises a first coupler 21 and a primary planetary gear set 22, the first coupler 21 is arranged close to the front end opening and is used for being in butt joint with the motor side coupler 7, the primary planetary gear set 22 comprises a primary transmission shaft 221, primary planet gears 222 and a primary planet carrier 223, the primary transmission shaft 221 is arranged in an extending mode along the front-back direction, one end of the primary transmission shaft 221 is a connecting end 221a for being in butt joint with the first coupler 21, a primary sun gear 221b is arranged at the other end of the primary transmission shaft 221, the primary planet carrier 223 is in clearance sleeve joint with the primary transmission shaft 221 and is provided with a first planet shaft 223a, and the primary planet gears 222 are rotatably arranged on the first planet shaft 223a and are in transmission engagement with outer side teeth of the primary sun gear 221 b;

the secondary transmission unit 3 comprises a secondary sun gear 31, a secondary planet wheel 32 and a secondary planet carrier 33, wherein the secondary sun gear 31 is coaxially sleeved on the primary transmission shaft 221 and fixedly connected with the primary planet carrier 223, one end of the secondary planet carrier 33 is used for installing the secondary planet wheel 32, the other end of the secondary planet carrier 33 is an extending end 331 extending out of an opening at the front end, and the secondary planet wheel 32 is rotatably installed on the secondary planet carrier 33 and is respectively in transmission engagement with the secondary sun gear 31 and the driving shell 1.

The motor side coupler 7 is used for being in butt joint with the output shaft of the motor, the first coupler 21 is used for being in butt joint with the primary transmission shaft 221, the motor side coupler 7 and the first coupler 21 are two half couplers which are mutually matched for use, when power output by the motor output shaft is transmitted to the primary transmission shaft 221 through the motor side coupler 7 and the first coupler 21, the power of the primary transmission shaft 221 is transmitted to the driving shell 1 through the primary planet gears 222, the primary planet carrier 223, the secondary sun gear 31 and the secondary planet gears 32 in sequence, so that the driving shell 1 rotates relative to the secondary planet carrier 33, and the speed reducer for the winch is convenient for connecting the motor shell by integrating the primary sun gear 221b on the primary transmission shaft 221 and setting the connecting end 221a of the primary transmission shaft 221 to be in direct transmission connection with the first coupler 21.

As shown in fig. 1, in the embodiment of the present utility model, the secondary sun gear 31 is coaxially and interstitially sleeved on the outer peripheral side of the primary transmission shaft 221 and is disposed between the connection end 221a and the primary sun gear 221b, and the primary planet carrier 223 is coaxially and interstitially sleeved on the outer peripheral side of the secondary sun gear 31 and is fixedly connected with the secondary sun gear 31, and the diameter of the addendum circle of the primary sun gear 221b is larger than the diameter of the central hole of the secondary sun gear 31. Specifically, the primary transmission shaft 221 between the connection end 221a and the primary sun gear 221b is a smooth circular shaft, the secondary sun gear 31 is coaxially and intermittently sleeved on the smooth circular shaft and can rotate relative to the smooth circular shaft, the primary planet carrier 223 is sleeved on the outer peripheral side of the secondary sun gear 31 and is fixedly connected with the secondary sun gear 31 through a spline, and of course, the primary planet carrier 223 can also be fixedly connected with the secondary sun gear 31 through a bolt connection, a welding manner and the like. The speed reducer in this embodiment optimizes the assembly positional relationship between the secondary sun gear 31 and the primary sun gear 221b, and sets the diameter of the addendum circle of the primary sun gear 221b to be larger than the diameter of the central hole of the secondary sun gear 31, so as to limit axial movement of the primary transmission shaft 221 in the direction of the front end opening.

As shown in fig. 1, in the embodiment of the present utility model, the speed reducer for a hoist further includes a first limit retainer ring 4, and the first limit retainer ring 4 is fixedly disposed on a front end surface of the gear teeth of the primary sun gear 221b and abuts against a rear end surface of the secondary sun gear 31. By arranging the first limiting retainer ring 4, the play amplitude of the primary transmission shaft 221 can be further limited, and the tooth end face of the primary sun gear 221b can be protected from abrasion. It should be noted that, because of the limitation of the tooth end surface of the first-stage sun gear 221b, the first-stage transmission shaft 221 easily generates a backward movement trend in the rotating process, and the movement trend can change the matching relationship between the first-stage limiting retainer ring 4 and the second-stage sun gear 31 from the original abutting matching to light contact matching or clearance matching, and the lubrication of the gear oil in the speed reducer is added, at this time, even if the speed reducer runs for a long time, the abrasion of the first-stage limiting retainer ring 4 to the rear end surface of the second-stage sun gear 31 is small.

As shown in fig. 1, in the embodiment of the present utility model, the drive housing 1 includes a rear end cover 5 for covering the rear end of the hollow cavity, and a wear-resistant stopper 51 aligned with the primary transmission shaft 221 in the front-rear direction is provided on the rear end cover 5, and the wear-resistant stopper 51 is for abutting against the rear end face of the primary sun gear 221 b. The wear-resistant stop block 51 can be embedded on the rear end cover 5, and the rear end face of the primary sun gear 221b can be abutted when the primary transmission shaft 221 moves backwards through the wear-resistant stop block 51, so that the primary sun gear 221b is prevented from wearing the rear end cover 5, the service life of the speed reducer is prolonged, and the wear-resistant stop block 51 can be replaced by a bearing.

In an embodiment of the present utility model, the connection end 221a and the first coupling 21 may be coupled by a spline.

As shown in fig. 1, in the embodiment of the present utility model, the secondary planet carrier 33 is provided with a first through cavity 332 penetrating front and back, the inner wall of the first through cavity 332 is provided with a first limit groove 333 recessed radially, and the first coupling 21 is disposed in the first through cavity 332 and is clamped and mounted by the first bearing 61 and the first limit groove 333. The support of the first bearing 61 can ensure smooth rotation of the first coupling 21, and the first limiting groove 333 can prevent the first bearing 61 from moving around.

As shown in fig. 1, in the embodiment of the present utility model, a sealing end cover 334 is further installed on the inner wall of the first through cavity 332, the sealing end cover is disposed forward relative to the first limiting groove 333, a second through cavity penetrating forward and backward is disposed on the sealing end cover 334, a second limiting groove 335 recessed radially is disposed on the inner wall of the second through cavity, and the first coupling 21 is installed in the second through cavity in a penetrating manner and is clamped by the second bearing 62 and the second limiting groove 335. That is, the first coupling 21 in the utility model adopts the double-bearing positioning support mode to mount the first coupling 21, so that the running stability of the first coupling 21 can be increased, meanwhile, the first coupling 21 is also provided with a limiting boss, the limiting boss can limit the second bearing 62, and through the cooperation of the limiting boss and the second limiting groove 335, the first coupling 21 can be prevented from axially moving relative to the inner wall of the first through cavity 332.

As shown in fig. 1, in the embodiment of the present utility model, the seal end cover 334 is mainly used to seal the inside of the speed reducer, so as to prevent the speed reducer oil from leaking or dust from entering the inside of the speed reducer, wherein the inside of the speed reducer refers to the space between the seal end cover 334 and the rear end cover 5. Preferably, the connecting end 221a of the primary transmission shaft 221 may be disposed inside the seal end cap 334, and at this time, gear oil inside the speed reducer may flow to the connecting end 221a and lubricate it, so that abrasion of splines on the connecting end 221a may be effectively reduced, and equipment reliability may be improved.

As shown in fig. 1, in the embodiment of the present utility model, the first limit groove 333 is defined by a first flange radially protruding from the inner wall of the first through cavity 332 and a second limit stopper ring 333a detachably mounted on the inner wall of the first through cavity 332, and the second limit groove 335 is defined by a second flange radially protruding from the inner wall of the second through cavity and a third limit stopper ring 335a detachably mounted on the inner wall of the second through cavity. By providing the side walls of the first and second stopper grooves 333 and 335 to be detachable, the installation of the first and second bearings 61 and 62 is facilitated.

As shown in fig. 1, in the embodiment of the present utility model, a sealing gasket 336 is further disposed between the sealing end cover 334 and the outer peripheral wall of the first coupling 21, and the sealing gasket 336 can increase the sealing performance of the sealing end cover 334, so as to avoid leakage of gear oil.

As shown in fig. 1, in the embodiment of the present utility model, an axial positioning collar 337 is further provided on the outer peripheral wall of the first coupling 21, and the axial positioning collar 337 and the third limiting collar 335a are radially aligned. Both sides of the second bearing 62 are restrained by the axial positioning retainer ring 337 and the first coupling 21, thereby preventing the second bearing 62 from axially moving relative to the first coupling 21.

As shown in fig. 1, in the embodiment of the present utility model, a mounting flange 8 for connection with a winding drum of a winding machine is provided on the drive housing 1, and a third bearing 63 is further provided between the drive housing 1 and the outer peripheral wall of the secondary planet carrier 33. The mounting flange 8 is fixedly connected with the winding drum, the extending end 331 of the secondary planet carrier 33 is fixedly connected with the shell of the motor, and the winding drum rotates relative to the shell of the motor through the transmission of the primary transmission unit and the secondary transmission unit 3 in the speed reducer.

In summary, the speed reducer of the utility model can provide a speed reducer with simple structure, high reliability and difficult inner part movement by optimizing the structure of the primary transmission shaft 221 and arranging three limiting check rings.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present utility model have been described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the present utility model, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the present utility model.

Claims (10)

1. A speed reducer for a hoist, the speed reducer comprising:

a drive housing (1) provided with a hollow cavity with an opening at the front end;

the primary transmission unit is arranged in the hollow cavity and comprises a first coupler (21) and a primary planetary gear set (22), the first coupler (21) is arranged close to the front end opening, the primary planetary gear set (22) comprises a primary transmission shaft (221), primary planet gears (222) and a primary planet carrier (223), the primary transmission shaft (221) extends and is arranged along the front-back direction, one end of the primary transmission shaft is a connecting end (221 a) for being in butt joint with the first coupler (21), a primary sun gear (221 b) is arranged at the other end of the primary transmission shaft (221), the primary planet carrier (223) is in clearance sleeve joint with the primary transmission shaft (221) and is provided with a first planet shaft (223 a), and the primary planet gears (222) are rotatably arranged on the first planet shaft (223 a) and are in transmission engagement with outer teeth of the primary sun gear (221 b); and

the secondary transmission unit (3) comprises a secondary sun gear (31), a secondary planet gear (32) and a secondary planet carrier (33), wherein the secondary sun gear (31) is coaxially sleeved on the primary transmission shaft (221) and fixedly connected with the primary planet carrier (223), one end of the secondary planet carrier (33) is used for being provided with the secondary planet gear (32) in an installation mode, the other end of the secondary planet carrier (33) extends out of an extending end (331) with an open front end, and the secondary planet gear (32) is rotatably installed on the secondary planet carrier (33) and is respectively meshed with the secondary sun gear (31) and the driving shell (1) in a transmission mode.

2. The speed reducer for a winch according to claim 1, wherein the secondary sun gear (31) is coaxially and intermittently sleeved on the outer peripheral side of the primary transmission shaft (221) and is disposed between the connecting end (221 a) and the primary sun gear (221 b), the primary planet carrier (223) is coaxially and coaxially sleeved on the outer peripheral side of the secondary sun gear (31) and is fixedly connected with the secondary sun gear (31), and the diameter of the tip circle of the primary sun gear (221 b) is larger than the diameter of the central hole of the secondary sun gear (31).

3. The speed reducer for a hoist according to claim 2, characterized in that the speed reducer for a hoist further includes a first stopper ring (4), the first stopper ring (4) being fixedly provided on a front end face of a gear tooth of the primary sun gear (221 b) and abutting against a rear end face of the secondary sun gear (31).

4. A reducer for a hoist according to claim 3, characterized in that the drive housing (1) includes a rear end cap (5) for closing a rear end of the hollow chamber, the rear end cap (5) is provided with a wear-resistant stopper (51) aligned in a front-rear direction with the primary transmission shaft (221), and the wear-resistant stopper (51) is adapted to abut against a rear end face of the primary sun gear (221 b).

5. A reducer for a hoisting machine according to claim 1, characterized in that the connecting end (221 a) is spline-fitted with the first coupling (21).

6. The reducer for a hoisting machine according to any one of claims 1 to 5, wherein the secondary planet carrier (33) is provided with a first through cavity (332) penetrating front and back, a first limit groove (333) recessed radially is provided on an inner wall of the first through cavity (332), and the first coupling (21) is disposed in the first through cavity (332) and is mounted in a clamped manner by a first bearing (61) and the first limit groove (333).

7. The reducer for a hoisting machine according to claim 6, wherein a sealing end cover (334) is further installed on the inner wall of the first penetrating cavity (332), the sealing end cover (334) is disposed in front of the first limiting groove (333), a second penetrating cavity penetrating front and back is formed in the sealing end cover (334), a second limiting groove (335) recessed in the radial direction is formed in the inner wall of the second penetrating cavity, and the first coupling (21) is installed in the second penetrating cavity in a penetrating manner through a second bearing (62) and the second limiting groove (335) in a clamping manner.

8. The speed reducer for a hoisting machine according to claim 7, wherein the first limit groove (333) is defined by a first flange radially protruding from an inner wall of the first through-hole chamber (332) and a second limit stopper ring (333 a) detachably mounted on the inner wall of the first through-hole chamber (332), and the second limit groove (335) is defined by a second flange radially protruding from an inner wall of the second through-hole chamber and a third limit stopper ring (335 a) detachably mounted on the inner wall of the second through-hole chamber.

9. The speed reducer for a hoisting machine according to claim 7, wherein a sealing gasket (336) is further provided between the sealing end cap (334) and the outer peripheral wall of the first coupling (21).

10. The reducer for a hoist according to any one of claims 1 to 5, characterized in that the drive housing (1) is provided with a flange (8) for connection with a reel of the hoist, and a third bearing (63) is further provided between the drive housing (1) and the outer peripheral wall of the secondary planet carrier (33).