JPH0554484U - winch - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] With regard to winches, the winch drum can be rotated by an external load to rotate it.
It is intended to improve usability when rolling a wound wire. A drive shaft 10 is rotatably supported by a bearing portion 13 formed in a gear case 3, and a sun gear 16 meshed with the drive shaft 10 and driven to rotate is rotated about the same axis as the sun gear 16. A planetary gear 17 rotatably supported by a possible carrier 18 and meshing with the sun gear 16.
A ring gear 21 that is disposed in the gear case 3 and meshes with the planetary gear 17, and a ring gear 21 that is fixed to the winch drum 5 and meshes with the planetary gear 17, and has a difference in the number of teeth with respect to the ring gear 21. And a movable ring gear, and a connection release mechanism 26 for connecting or disconnecting the ring gear 21 to or from the gear case 3 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a winch, and more particularly to a winch mounted on an off-road vehicle or the like and used for hoisting or towing luggage.

[0002]

[Prior Art]

 Conventionally, the reduction mechanism of this type of electric winch is composed of a planetary gear train composed of three planetary gears and a ring gear. The rotation from the drive shaft is increased by the action of the three planetary gears, and the output shaft is rotated. It is adapted to be transmitted to the winch drum via. However, in this electric winch, in order to obtain the target reduction ratio (generally about 1/150), a three-stage planetary gear train composed of three sets of planetary gears and ring gears is adopted. .. Therefore, there are problems that the number of parts is large, the structure is complicated, the weight is increased, and the size is increased.

The applicant has already proposed an electric winch having a reduced number of parts, a simplified structure, and a reduced size, as shown in FIG. In this electric winch, a winch drum 52 is rotatably provided with respect to a gear case 51. An electric motor (not shown) is arranged in the winch drum 52, and a drive shaft 53 which can be rotated in the forward and reverse directions by the electric motor penetrates the end plate 54 and projects to the outside of the winch drum 52. The tip of the drive shaft 53 is inserted into a cylindrical bearing portion 55 provided inside the gear case 51. A bearing 56 is interposed between the drive shaft 53 and the bearing portion 55. Therefore, the tip of the drive shaft 53 is rotatably supported by the bearing 55 via the bearing 56.

A spline 57 is formed on the outer peripheral surface of the drive shaft 53 between the gear case 51 and the end plate 54, and a sun gear 58 is meshed with the spline 57. Then, around the sun gear 58, three planet gears 59 meshing with the sun gear 58 are arranged so as to support at three points, and these planet gears 59 are attached to a shaft 61 attached to the carrier 60. It is rotatably supported. The carrier 60 is composed of two discs 61a and 61b arranged on both end faces in the axial direction of the planetary gear 59, and both discs 61a and 61b have a plurality of stepped connecting pins 62 in the circumferential direction. Are connected at a fixed interval by.

A fixed ring gear 63 and a movable ring gear 64, which are arranged side by side, are meshed with the planetary gear 59. The fixed ring gear 63 is fitted to the inner peripheral surface of the cylinder of the gear case 51, and is fixed by the key 65. The movable ring gear 64 is fitted to the inner peripheral surface of the cylindrical portion of the winch drum 52 which extends outwardly of the end plate 54, and is fixed by a key 66. The movable ring gear 64 has one to three more teeth than the fixed ring gear 63.

Then, when the drive shaft 53 rotates due to the driving of the electric motor, the sun gear 58 rotates. Therefore, the planetary gear 59 meshing with the sun gear 58 rotates (revolves) around the sun gear 58 while rotating (spinning) around the drive shaft 53. At this time, when the planetary gear 59 makes one revolution around the sun gear 58, that is, one revolution, the movable ring gear 64 rotates by the number of teeth difference from the fixed ring gear 63, and this rotation is transmitted to the winch drum 52. Therefore, the winch drum 52 can wind or extend the wire.

Further, when an external load is applied to the winch drum 52 while the electric motor (not shown) is stopped, the external load causes the planetary gear 59 to rotate via the movable ring gear 64. However, since the planetary gear 59 is locked by the fixed ring gear 63, its rotation is blocked.

[0008]

[Problems to be solved by the device]

 However, although the winch drum 52 can prevent the rotation even when an external load to rotate the winch drum 52 acts, for example, the winch drum 52 is rotated to quickly move the wire wound around the winch drum 52. It cannot be extended and used. Therefore, the winch drum 52 must be rotated by the reverse rotation of the electric motor to extend the wire, which causes a problem of low usability.

The present invention has been made to solve the above problems, and the purpose thereof is to enable the winch drum to be rotated as needed even by an external load to rotate the winch drum, which improves usability. It is to provide a winch that can be improved.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention has a drive shaft rotatably supported by a bearing portion formed in a gear case, a sun gear meshed with the drive shaft and driven to rotate, and a sun gear that rotates about the same axis. Is rotatably supported by a rotatable carrier and is fixed to a winch drum, a planetary gear train that meshes with the sun gear, a ring gear that is arranged in the gear case and meshes with the planetary gear train. A movable ring gear that meshes with the planetary gear train and has a tooth number difference with respect to the ring gear, and a connection opening mechanism that connects or disconnects the ring gear to the gear case is provided. Let's take the summary.

[0011]

[Action]

 When the drive shaft is rotated while the ring gear is connected to the gear case by the connection release mechanism, the sun gear rotates and the planetary gear train revolves around the sun gear. At this time, since the movable ring gear has a tooth number difference with respect to the ring gear, the movable ring gear rotates by the tooth number difference and the winch drum rotates.

Further, when the winch drum is rotated in a state where the ring gear is disconnected from the gear case by the connection opening mechanism, the planetary gear train tries to rotate via the movable ring gear. At this time, since the ring gear is disconnected from the gear case, the ring gear rotates together with the movable ring gear. Therefore, the winch drum can be rotated by an external load.

[0013]

【Example】

 An embodiment in which the present invention is embodied in an electric winch will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, an electric winch 2 is fixed to a frame 1 fixed to a front portion of a vehicle body by a mounting bolt 3a. The front side is generally covered by a front bumper (not shown). A laterally cylindrical winch drum 5 is rotatably supported by a gear case 3 and an end bracket 4 which form the electric winch 2 via bushes 6, respectively. Then, the gear case 3 and the end bracket 4 are tightened and fixed by the mounting bolts 3 a which insert the frame 1.

An opening 4a is formed in the end bracket 4, and an electric motor 7 capable of forward and reverse driving is inserted through the opening 4a into the winch drum 5 in a sideways state. The main body of the electric motor 7 is supported on the end bracket 4 by a motor bracket 9 fixed by a fixing bolt 8. The drive shaft 10 of the electric motor 7 is inserted through the through hole 12 of the end plate 11 of the winch drum 5, and the tip of the drive shaft 10 is provided with a bearing 14 for a bearing portion 13 formed inside the gear case 3. It is rotatably supported via.

A spline 15 is formed on the drive shaft 10 between the gear case 3 and the end plate 11, and a sun gear 16 is meshed with the spline 15 of the drive shaft 10. Around the sun gear 16, three planetary gears 17 that mesh with the sun gear 16 are arranged (see FIG. 3). A planetary gear train G is constituted by the planetary gear 17, and the planetary gear 17 is rotatably supported by a shaft 19 supported by a pair of support plates 18a and 18b constituting a carrier 18. The pair of support plates 18a, 18b forming the carrier 18 are held by a plurality of stepped connecting pins 20 which are inserted at regular intervals in the axial direction of the planetary gear 17.

Two ring gears 21 and a movable ring gear 22 are meshed with the planet gear 17 in a juxtaposed state. The movable ring gear 22 is fitted to the outer peripheral surface of the cylindrical portion of the winch drum 5, which extends outwardly of the end plate 11, and is fixed to the winch drum 5 by a key 24. The fixed ring gear 21 and the movable ring gear 22 are different in the number of teeth by one to three teeth. In this embodiment, the movable ring gear 22 has one to three more teeth than the fixed ring gear 21.

Further, as shown in FIG. 3, the ring gear 21 is provided with a connection opening mechanism 26 for connecting or disconnecting the ring gear 21 to the gear case 3. Explaining the structure of the connection release mechanism 26, a flexible belt 27 that constitutes the connection release mechanism 26 is disposed on the outer peripheral surface of the ring gear 21, and the inner peripheral surface of the ring gear 21 described above is disposed. A lining material 28 that can be pressed against the outer peripheral surface is provided.

Further, as shown in FIGS. 3 and 4, one end of the belt 27 is connected and fixed to a support pin 30 which is rotatably supported by a pair of support pieces 29 formed integrally with the gear case 3. ing. A pair of turning levers 31 are fixed to the support pin 30, and a turning pin 32 is rotatably provided at the tip of the pair of turning levers 31. Further, the rotation pin 32 is formed with an insertion hole 32a.

On the other hand, a connecting member 33 is fixed to the upper surface of the other end of the belt 27, and a connecting rod 34 is fixed to the connecting member 33. A coil spring 35 is interposed in the connecting rod 34, and in this state, the tip of the connecting rod 34 is inserted into the insertion hole 32a of the rotating pin 32 in a freely insertable state. Further, an operating lever 36 protruding to the outside of the gear case 3 is fixed to the one rotating lever 31, and the operating lever 36 can be operated to forcibly rotate the rotating lever 31. It is like this.

As shown in FIG. 5, when the rotating pin 32 is located below the dead point P connecting the connecting member 33 and the support pin 30, the belt 27 and the lining are urged by the urging force of the coil spring 35. The material 28 moves in the direction of the arrow. Therefore, the ring gear 21 is held in a state of being fastened by the belt 27 via the lining material 28, that is, in a state of being connected to the gear case 3. The coil spring 35 is preset so that the belt 27 can be moved in the direction of the arrow by the urging force to sufficiently tighten the ring gear 21.

Further, as shown in FIG. 6, when the rotating lever 31 is rotated clockwise around the support pin 30 while resisting the biasing force of the coil spring 35, the connecting rod 34 is rotated. The coil spring 35 is inserted into the insertion hole 32a of 32 and the coil spring 35 is compressed. When the rotating pin 32 is positioned above the dead point P and is located above, the belt 27 and the lining material 28 are moved in the arrow direction by the urging force of the coil spring 35. Therefore, the ring gear 21 is held in a state where the tightening by the belt 27 is released via the lining material 28, that is, a state where the connection with the gear case 3 is opened.

Next, the operation of the electric winch configured as described above will be described. First, as shown in FIG. 5, the operating lever 36 is operated to position the rotating pin 32 below the dead point P. Then, the turning lever 31 is biased counterclockwise about the support pin 30 by the biasing force of the coil spring 35. Further, since the belt 27 and the lining material 28 move in the direction of the arrow to tighten the ring gear 21, the ring gear 21 is connected to the gear case 3. That is, the ring gear 21 can be connected to the gear case 3 by operating the operation lever 36 in the X arrow direction to operate the connection opening mechanism 26.

In this state, when the electric motor 7 is driven to rotate the drive shaft 10 and the sun gear 16, the planet gears 17 meshed with the sun gear 16, the fixed ring gear 21 and the movable ring gear 22, respectively. It rotates (rotates) around the shaft 19. Then, the planetary gear 17 rotates (revolves) around the sun gear 16 while rotating on its own axis. At this time, when the planetary gear 17 makes one revolution around the sun gear 16, that is, one revolution, the movable ring gear 22 rotates by the number of teeth difference from the ring gear 21, and this rotation is transmitted to the winch drum 5. ..

Therefore, since the difference in the number of teeth between the ring gear 21 and the movable ring gear 22 is only 1 to 3, the planetary gear train G having one stage has a large reduction ratio (generally about 1/150). ) Can be obtained.

Incidentally, the rotation direction of the movable ring gear 22 is the same as the revolution direction of the planetary gear 17 when the number of teeth of the movable ring gear 22 is larger than the number of teeth of the ring gear 21, and when the number of teeth is small, It goes in the opposite direction.

Further, as shown in FIG. 6, the operation lever 36 is operated in the Y arrow direction to position the rotating pin 32 above the dead point P. Then, the turning lever 31 is biased clockwise around the support pin 30 by the biasing force of the coil spring 35. Further, the belt 27 and the lining material 28 move in the direction of the arrow to release the tightening of the ring gear 21, so that the ring gear 21 is disconnected from the gear case 3. That is, by operating the operation lever 36 in the direction of the arrow Y to operate the connection opening mechanism 26, the ring gear 21 can be opened to the gear case 3.

When the winch drum 5 is rotated in this state, the ring gear 21 tends to rotate via the movable ring gear 22 and the planetary gear 17. At this time, since the ring gear 21 is not connected to the gear case 3 by the connection opening mechanism 26, the ring gear 21 rotates.

As a result, the winch drum 5 can be rotated by an external load if the connection release mechanism 26 brings the ring gear 21 into an open state in which it is not connected to the gear case 3. Further, the wire can be directly pulled by hand and extended, and the usability of the electric winch 2 can be improved.

In the present embodiment, the rotation of the ring gear 21 is regulated by the lining material 28 and the ring gear 21 is connected to the gear case 3. However, as shown in FIG. The concavo-convex portion 21a may be formed on the inner surface of the belt 27, and the concavo-convex portion 27a meshing with the concavo-convex portion 21a may be formed on the inner peripheral surface of the belt 27. In this case, the ring gear 21 can be reliably connected to the gear case 3 by the connection opening mechanism 26.

Further, in the present embodiment, the ring gear 21 is connected to the gear case 3 by tightening the belt 27, but a configuration as shown in FIG. 8 is also possible.

That is, a plurality of holes 37 are formed in the outer peripheral surface of the ring gear 21. A through hole 3b is formed in the gear case 3. A housing 38 is provided on the gear case 3 so as to cover the through hole 3b, and a connection fixing pin 39 which is inserted into the hole 37 through the housing 38 and the through hole 3b is arranged. A flange 39a is provided on the connection fixing pin 39 in the housing 38, and a spring 40 is provided between the flange 39a and the inner surface of the upper portion of the housing 38. Therefore, the connecting and fixing pin 39 is constantly pressed downward by the urging force of the spring 40.

Therefore, when the connection fixing pin 39 is inserted into the hole 37 of the ring gear 21, the ring gear 21 is connected to the gear case 3, and thus the electric motor 7 is driven. By doing so, the winch drum 5 can be rotated. Further, even if an external load is applied to the winch drum 5 with the electric motor 7 stopped, the rotation of the winch drum 5 can be prevented.

Further, the connection fixing pin 39 is pulled up against the biasing force of the spring 40 and pulled out from the hole 37, so that the connection between the ring gear 21 and the gear case 3 is released. Then, a locking member (not shown) is interposed between the connection fixing pin 39 and the upper surface of the housing 38 so that the connection fixing pin 39 does not move downward due to the urging force of the spring 40. As a result, the winch drum 5 can be rotated.

Further, when the coupling fixing pin 39 is inserted into the hole 37 to couple the ring gear 21 and the gear case 3, the coupling fixing pin 39 is removed by removing a lock member (not shown). Move by. At this time, even if the connecting and fixing pin 39 is not properly inserted into the hole 37, if the hole 37 and the connecting and fixing pin 39 are aligned with each other when the winch drum 5 is rotated to rotate the ring gear 21, the connecting and fixing pin 39 is fixed. The fixed pin 39 is moved by the biasing force of the spring 40 and is inserted into the hole 37. As a result, the ring gear 21 and the gear case 3 can be connected.

In the present embodiment, the drive shaft 10 is rotated by the electric motor 7, but in addition to this, the drive shaft 10 is connected to the engine through a clutch, and the drive shaft 10 is connected by turning the clutch on and off. It can also be configured to rotate.

Further, although the electric winch applied to the vehicle is embodied in the present embodiment, the application is not limited to the vehicle.

[0038]

[Effect of the device]

 As described in detail above, according to the present invention, the winch drum can be rotated as needed even by the load applied to the outer portion of the winch drum, which has an excellent effect of improving usability. ..

[Brief description of drawings]

FIG. 1 is a partial side sectional view showing a state in which a belt is arranged around an outer circumference of a ring gear with a lining material interposed therebetween.

FIG. 2 is a sectional view of an electric winch according to the present invention.

FIG. 3 is a partial cross-sectional view showing a state in which a belt is arranged on the outer circumference of a ring gear with a lining material interposed therebetween.

FIG. 4 is a partial plan view showing a connection opening mechanism.

FIG. 5 is a partial cross-sectional view showing a state where the ring gear is fastened to the gear case by the connection releasing mechanism.

FIG. 6 is a partial cross-sectional view showing a state in which the ring gear is opened to the gear case by the connection opening mechanism.

FIG. 7 is an explanatory view showing another example of the belt.

FIG. 8 is a cross-sectional view showing another example of the connection opening mechanism.

FIG. 9 is a partially enlarged sectional view showing a state of a carrier supporting a planetary gear train in a conventional electric winch.

[Explanation of symbols]

3 ... Gear case, 5 ... Winch drum, 7 ... Electric motor, 10 ... Drive shaft, 13 ... Bearing part, 16 ... Sun gear, 1
8 ... Carrier, 21 ... Ring gear, 22 ... Movable ring gear, 26 ... Connection release mechanism, G ... Planetary gear train

Claims (1)

[Scope of utility model registration request] 1. A sun gear, which is rotatably supported by a bearing portion formed on a gear case, is rotatably driven by being meshed with the drive shaft, and a carrier rotatable about the same axis as the sun gear. A planetary gear train that is rotatably supported and that meshes with the sun gear, a ring gear that is disposed in the gear case and meshes with the planetary gear train, and a planetary gear train that is fixed to a winch drum and meshes with the planetary gear train. And a movable ring gear having a tooth number difference with respect to the ring gear, and a winch provided with a connection opening mechanism for connecting or disconnecting the ring gear to or from a gear case.