KR20050001549A - Winch - Google Patents

Abstract

PURPOSE: A winch is provided to simplify the shape of a housing by installing a worm wheel and a drum at a shaft fixed at a housing and to simplify the shape of the worm wheel and the drum by forming spline teeth on the outer peripheral surface of a spline unit and installing a sleeve on the spline unit. CONSTITUTION: A winch(1) is composed of a housing(10), a support bracket(20), a fixed shaft(30), a worm wheel(40), a drum(50), a sleeve(61), a sleeve moving unit, a worm shaft(70), and a motor. The housing has an inlet(11) which is opened to the side. One end of the fixed shaft is fixed in the housing and the other end is extended out of the housing through the inlet of the housing and settled at the support bracket. The worm wheel has a through-hole formed axially in the center, a worm gear unit(41), and a first spline unit(43) having spline teeth formed on the outer peripheral surface of an axial one end and the worm wheel rotates for the fixed shaft in the housing to face the first spline unit toward the inlet of the housing by inserting the fixed shaft in the through-hole. The drum comprises a through-hole formed axially in the center, a bobbin unit(51), and a second spline unit(53) having spline teeth on the outer peripheral surface of the axial one end. The fixed shaft is inserted into the through-hole and the drum rotates about the fixed shaft to adjoin the second spline unit with the first spline unit in the housing and to expose the bobbin unit out of the housing between the housing and the support bracket. The sleeve has spline grooves engaged with the spline teeth of the first and second spline units and the sleeve is installed at the first and second spline units to reciprocate axially the spline grooves by engaging with the spline teeth of the first and second spline units. The sleeve moving unit is connected with the sleeve to reciprocate the sleeve. The worm shaft is mounted in the housing to engage rotatively a worm unit with the worm gear unit. An output shaft of the motor is linked with the worm shaft.

Description

Winch

The present invention relates to a winch, and more particularly, the winch is reduced in size by reducing the number of parts and weight of the winch by integrating a worm wheel of the worm gear for reducing the rotation of the motor and a clutch for intermittent rotation to the drum on which the rope is wound. It is about.

A winch is a mechanism that lifts or pulls a heavy object by wrapping a rope around a cylindrical drum. These winches typically include a hydraulic winch using a hydraulic motor as a power source, an electric winch using an electric motor as a power source, and an axle connected to the transmission of the vehicle or a hydraulic pump connected to the transmission. There is a PTO (Power Take Off) winch that uses power.

In general, the rotational force of a hydraulic motor or an electric motor for rotating the drum is decelerated by a power transmission device having a reduction gear train and transmitted to the drum. However, a worm gear composed of a combination of a worm and a worm wheel is suitable for a power transmission device of a winch in that a large reduction ratio can be obtained and not reversed, and the structure is simple. U.S. Patent No. 3788607, Canadian Patent No. 1056806, Korean Utility Model Publication No. 96-8034, Japanese Patent Application Laid-Open No. 2000-302380, and Japanese Patent Application Laid-Open No. Hei 1-133895 include power transmission including a worm gear. A winch with a device is disclosed. On the other hand, the power transmission device is generally equipped with a clutch for controlling power. The winches disclosed in Korean Unexamined Utility Model Publication No. 96-8034, Japanese Patent Application Laid-Open No. 2000-302380, and Japanese Patent Application Laid-Open No. Hei 1-133895 are provided with a clutch in a power transmission device.

However, the conventional winches disclosed in Korean Utility Model Publication No. 96-8034 and Japanese Patent Laid-Open No. 2000-302380 have clutches of power transmission stations located outside of the housing and have a separate configuration for forming the clutch. Because of the large number of parts and heavy weight has the disadvantage. In order to overcome the above disadvantages, the winch disclosed in Japanese Laid-Open Patent Publication No. Hei 1-1333895 is a clutch that is built in the housing and the drive shaft is omitted. However, the conventional winch has a complex shape in which the worm wheel and the drum can be supported because the winch is configured such that the worm wheel and the drum are rotatably supported by the housing, omitting a drive shaft. In addition, the conventional winch has a complicated shape of the worm wheel and the drum because the clutch is formed with a spline groove on the inner circumferential surface of the worm wheel and the drum and the hub is installed in the worm wheel and the drum to reciprocate with the spline groove. And the assembly has a complicated disadvantage.

The present invention is to solve the above problems, an object of the present invention is to form a clutch by the spline portion integrally formed with the worm wheel and the drum and the sleeve to engage with the spline reciprocating movement to reduce the number and weight of parts of the winch In short, it provides a compact winch.

Particularly, the object of the present invention is not only the shape of the housing is simple by installing the worm wheel and the drum on the shaft fixed to the housing, but also the shape is simple and assembled by installing the sleeve on the spline of the worm wheel and the drum where the spline is formed on the outer circumferential surface thereof. This is to provide a simple winch.

1 is a cross-sectional view showing a winch according to an embodiment of the present invention.

Figure 2 is a cross-sectional view showing a partially cut winch according to an embodiment of the present invention

3 is a cross-sectional view showing a cross section taken along the line A-A of FIG.

4 is a cross-sectional view showing a cross section taken along the line B-B of FIG.

5 is a cross-sectional view showing a winch according to another embodiment of the present invention.

<Short description of the major reference symbols>

1 winch 10 housing

20 Support bracket 30 Fixed shaft

40 Worm wheel 41 Worm gear

43 First Spline 50 Drum

51 Bobbin 53 Second Spline

61 sleeve 70 worm shaft

71 Worm part 80 Sleeve moving means

81 Cylinder housing 84 Cylinder rod

87 fork 89 lever

90 Motor 91 Output Shaft

The winch according to the present invention for achieving the above object, the housing having an opening in one side, a support bracket, one end is fixed to the housing inside the housing, the other end is the inlet of the housing A fixed shaft fixed to the support bracket and extending to the outside of the housing, a through hole formed in the axial direction at the center, a worm gear portion, and a first spline portion having a spline formed at an outer circumferential surface of one end in the axial direction; A worm wheel in which the fixed shaft is inserted into the through hole so that the first spline portion faces the inlet of the housing, the rotatable wheel rotatably installed with respect to the fixed shaft; A hollow portion and a second spline portion having a spline formed on an outer circumferential surface of one end portion in the axial direction, wherein the second spline portion has the lower portion; A drum provided with the fixed shaft inserted in the through hole so as to be exposed to the outside of the housing between the housing and the support bracket and adjacent to the first spline portion within the gong, the drum being rotatably installed with respect to the fixed shaft. And a spline groove formed on an inner circumferential surface thereof to engage with the spline of the first spline portion and the second spline portion, and the spline groove meshes with the spline of the first spline portion and the second spline portion to reciprocate in the axial direction. A sleeve provided in the first spline portion and the second spline portion, a sleeve moving means connected to the sleeve to reciprocally move the sleeve, and a worm portion rotatably engaged with the worm gear portion to rotate inside the housing. An installed worm shaft and an output shaft including a motor connected to the worm shaft do.

In addition, the winch according to the invention, the sleeve movement means, the hydraulic cylinder is provided with a lever connected to the cylinder rod to apply an external force for moving the cylinder rod, one end is connected to the cylinder rod of the hydraulic cylinder The other end includes a fork rotatably connected to the sleeve with respect to the sleeve, and the cylinder rod is moved by hydraulic pressure such that the spline groove is engaged with the spline of the first spline part and the spline of the second spline part simultaneously by hydraulic pressure. And the spline groove is moved to engage any one of the spline of the first spline portion and the spline of the second spline portion by an external force applied to the lever.

In addition, the winch according to the invention is characterized in that the sensor for detecting the position of the cylinder rod is installed in the hydraulic cylinder.

In addition, the winch according to the invention is characterized in that the drum is supported by a friction bearing is installed on the fixed shaft.

In addition, the winch according to the invention, characterized in that the discharge port is formed in the housing.

In addition, the winch according to the present invention is rotated in contact with the rotation arm is provided with one end portion rotatably up and down from the upper portion of the bobbin portion, and a rope wound around the bobbin portion at one end portion of the rotation arm located above the bobbin portion. And a pressurizing device provided with a roller which is installed as possible, and a spring for applying the force to the pivotal arm in the direction in which the roller presses the rope wound on the bobbin portion.

In addition, the winch according to the invention is characterized in that it further comprises a guide provided to be spaced apart from the outer peripheral surface of the bobbin portion by a predetermined interval.

Hereinafter, with reference to the embodiment shown in the drawings will be described in detail the winch according to the present invention.

1 is a cross-sectional view showing a winch according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a partially cut winch according to an embodiment of the present invention, Figure 3 is a cross-sectional view along line AA of Figure 2 4 is a cross-sectional view illustrating a cross section taken along line BB of FIG. 2, and FIG. 5 is a cross-sectional view illustrating a winch according to another embodiment of the present invention.

1 to 4, the winch 1 according to an embodiment of the present invention includes a housing 10, a support bracket 20, a fixed shaft 30, a worm wheel 40, and a drum ( 50, a sleeve 61, a sleeve moving means 80, a worm shaft 70, and a motor 90.

The housing 10 has an inlet 11 opened to one side. On the inner edge of the inlet 11 is formed a seat surface 11a to which the sealing member 37 described below abuts. Inside the housing, a hole 12 for inserting and fixing one end of the fixed shaft 30 is formed at a position opposite to the inlet 11. In addition, a hole 13 is formed in the housing 10 so that one end of the worm shaft 70 is rotatably supported. One end of the fixed shaft 20 is accommodated in the housing 10, and one end thereof is fixed to the hole 12, and a second spline portion of the worm wheel 40 and the drum 50 is disposed therein. 53 and the sleeve 61 are received. The housing 10 is fixed by fixing the fixed bracket portion 14 integrated with the housing 10 to a predetermined support structure 5.

Winch 1 according to an embodiment of the present invention is characterized in that the outlet 16 is formed in the upper portion of the housing (10). The outlet 16 is generated by the rotation of the worm wheel 40, the second spline portion 53 of the drum 50, the sleeve 61, and the worm shaft 70 inside the housing 10. To release heat and pressure. Reference numeral 16a denotes an extension nipple of the outlet.

Referring to the drawing, a drain hole 17 for discharging lubricating oil or the like is formed in the lower portion of the housing 10, and the drain hole 17 is sealed to be opened and closed by a stopper 17a.

The support bracket 20 is fixed to a predetermined support structure 6 so that the other end of the fixed shaft 30, which is the opposite end of the one end fixed to the housing 10, is fixed to the housing 10. Support the fixed shaft 30 together. Referring to the drawings, the support bracket 20 is formed with a hole 21 for inserting and fixing the other end of the fixed shaft 30.

Both ends of the fixed shaft 30 are fixed to and supported by the housing 10 and the support bracket 20. That is, one end of the fixed shaft 30 is inserted into and fixed to the hole 12 of the housing 10 inside the housing 10, and the other end thereof is inserted into the housing 10 through the inlet of the housing 10. It is extended to the outside of the support bracket 20 is inserted into and fixed to the hole 21 of the support bracket 20. The worm wheel 40 and the drum 50 are rotatably installed on the fixed shaft 20. The fixed shaft 20 preferably has a cylindrical shape to smoothly rotate the worm wheel 40 and the drum 50.

The worm wheel 40 is to reduce the rotation of the worm shaft 70 to be described below to be delivered to the drum 50 through the clutch, the through-hole formed in the axial direction in the center, the worm gear portion 41, It has a first spline portion 43. The worm gear part 41 is a portion where the worm gear is formed on the outer circumferential surface and is engaged with the worm part 71 described below. The first spline portion 43 is a portion in which a spline groove in which a spline groove of the sleeve 61 described below is engaged is formed on an outer circumferential surface thereof so that the sleeve 61 can be reciprocated. The present invention is characterized in that the worm wheel 40 is integrally provided with the worm gear part 41 and the first spline part 43. In the worm wheel 40 as described above, the fixed shaft 30 is inserted into the through hole so that the first spline portion 43 faces the inlet of the housing in the housing 10. 30) is rotatably installed. Referring to the drawings, it is preferable that the oil groove 45 is formed on the inner circumferential surface of the through hole of the worm wheel 40 so that the worm wheel 40 rotates smoothly and oil is supplied thereto.

The drum 50 is rotated by receiving rotation from the worm wheel 40 when the clutch is connected to wind the rope, and includes a through hole formed in the center in the axial direction, a bobbin part 51, and a second spline part ( 53). The bobbin portion 51 is a portion in which the rope is wound, and is a cylindrical portion having flanges 51a and 51b on both sides. The second spline portion 53 is a portion in which a spline groove in which a spline groove of the sleeve 61 described below is engaged is formed on an outer circumferential surface thereof so that the sleeve 61 can be reciprocated. The present invention is characterized in that the drum 50 is integrally provided with the bobbin portion 51 and the second spline portion 53. In the drawing, an embodiment in which the second spline portion 53 is integrally coupled to one side of the bobbin portion 51 by a bolt 53b is illustrated. On the other hand, Figure 5 shows a winch 1 according to another embodiment of the present invention, it shows an embodiment in which the bobbin portion 51 and the second spline portion 53 is integrally formed. In the drum 50 as described above, the second spline part 53 is adjacent to the first spline part 43 inside the housing 10, and the bobbin part 51 is connected to the housing 10 and the The fixed shaft 30 is inserted into the through hole so as to be exposed to the outside of the housing 10 between the support brackets 20 so as to be rotatable about the fixed shaft 30. Since the wire is wound around the bobbin portion 51 under a high tensile force, a large vertical force is generated between the inner surface of the through hole of the drum 50 and the outer surface of the rotating shaft 50, thereby causing a large friction. . Thus, the drum 50 has friction bearings 55a and 55b provided between the inner surface of the through hole and the outer surface of the fixed shaft 30 at both side inlets of the through hole so that the drum 50 can be smoothly rotated. It is preferable to be supported by.

Meanwhile, in the drawing, the sealing members 36 and 37 for preventing leakage of oil or dust are formed, and the gap between the support bracket 20 and the drum 50 and the housing 10 and the drum 50 are formed. An embodiment installed in each of the gaps is shown. Referring to the drawings, a floating seal is installed to the sealing member 37 in a gap formed between the housing 10 and the drum 50.

The sleeve 61 is installed on the first spline portion 43 and the second spline portion 53 to intercept rotation transmitted from the worm wheel 40 to the drum 50. Spline grooves that can engage with the spline of the first spline portion 43 and the spline of the second spline portion 53 are formed. The sleeve 61 is engaged with the spline of the first spline portion 43 and the spline of the second spline portion 53 so as to reciprocate in the axial direction to enable the first spline portion 43 and the first spline portion 43. It is installed in two spline parts 53. The sleeve 53 is reciprocated by the sleeve moving means 80, the spline groove of the sleeve 61 is the spline of the first spline portion 43 and the spline of the second spline portion 53 The power is cut off when it is engaged with any of the teeth. 1 illustrates a state in which power is cut off as described above, and a state in which the sleeve 61 is moved to be positioned at the first spline part 43 is illustrated in the drawing, and in this state, the worm wheel 40 is shown. Rotation of the sleeve 61 rotates but the drum 50 does not rotate. On the other hand, FIG. 5 illustrates a state in which the sleeve 61 is moved in engagement with the spline of the first spline part 43 and the spline of the second spline part 53 at the same time. In the same state, the rotation of the worm wheel 40 is transmitted to the drum 50 through the sleeve 61 so that the worm wheel 40, the sleeve 61, and the drum 50 are integrally rotated.

The sleeve moving means 80 is for reciprocating the sleeve 61, one embodiment of which is shown in detail in FIGS. 1 to 4, the sleeve moving means 80 includes a hydraulic cylinder, a fork 87, and a lever 89.

The hydraulic cylinder is installed to the outside of the housing 10 to move the fork 87 forward and backward. Referring to the drawings, the hydraulic cylinder has a cylinder housing 81 which is formed in the hole (83) which passes through the inside of the housing so that the fork 87 can pass and fixed to the outer surface of the housing 10, and the cylinder It has the cylinder rod 84 installed so that reciprocation is possible inside. The cylinder rod 84 has a piston 85 having a hydraulic pressure receiving surface, and is installed to be sealed by a sealing member 85a between cylinder inner surfaces 81a of the cylinder housing 81 to which the outer surface abuts. . Accordingly, an oil loss is formed by the cover 85 sealed by the sealing member 82a and blocking the piston 85, the cylinder inner surface 81a, and one side inlet of the cylinder. The oil chamber is formed in the cylinder housing 81 is formed with an inlet for connecting the conduit, the conduit is connected to a fluid source not shown in the figure, such as a pump for supplying a high pressure fluid. When the fluid is supplied from the fluid source to the oil chamber through the conduit, the cylinder rod 85 moves in one direction.

The fork 87 is for connecting the reciprocating motion of the cylinder rod 85 to the sleeve 61, one end is connected to the cylinder rod 85 of the hydraulic cylinder, the other end is the cylinder housing 81 It extends into the housing (10) through a hole (83) of the) and is connected to the sleeve (61) rotatably with respect to the sleeve (61).

On the other hand, the winch 1 according to an embodiment of the present invention, the hydraulic cylinder is provided with a lever (89) connected to the cylinder rod (85) to apply an external force for moving the cylinder rod (85) The cylinder rod 85 is moved by hydraulic pressure so that the spline groove meshes with the spline of the first spline part 43 and the spline of the second spline part 53 at the same time, and an external force applied to the lever. The spline groove is moved so as to be engaged with any one of the spline of the first spline portion 43 and the spline of the second spline portion 53. That is, the cylinder rod in the direction in which the sleeve 61 is moved so that the spline groove of the sleeve 61 meshes with the spline of the first spline portion 43 and the spline of the second spline portion 53 at the same time. It is characterized in that the 85 is moved by hydraulic pressure, and in the opposite direction, by the operation of the lever 89 connected to the cylinder rod 85. The winch according to the present invention should remain connected to the clutch during work in which heavy goods are connected to the rope. This means that the worm wheel 40 and the worm shaft are not inverted so that rotation is transmitted from the motor 90 in order to wind the rope to which the heavy material is connected to the drum 50, and the heavy rope is not reversed so as not to be released from the drum 50. This is because the drum 50 must be self-locking by 70. Accordingly, the winch 1 according to the embodiment of the present invention has a hydraulic pressure such that the cylinder rod 85 is moved in the direction in which the clutch is connected while the hydraulic cylinder of the sleeve moving means 80 is maintained. It is supplied and moved in the opposite direction by the operation of the lever (89). The lever 89 is rotatably hinged to a hinge bracket 88 fixed to the cylinder housing 81, and one end is hinged to one end of the cylinder rod 85. Reference numeral 88a denotes a hinge pin.

On the other hand, the winch 1 according to an embodiment of the present invention is characterized in that the sensor 63 for generating a signal by detecting the position of the cylinder rod 85 is installed in the hydraulic cylinder. Since the position of the cylinder rod 85 corresponds to the connection state of the clutch, the signal generated by the sensor 63 can be used to inform the operator whether the user is currently working or to control a separate safety device. . 2 and 3, the sensor 63 is installed in the cylinder housing 81 to detect a state in which the cylinder rod 63 is advanced by hydraulic pressure.

The worm shaft 70 transmits rotation from the motor 90 to the worm wheel 40, and has a worm portion 71 in which a worm is engaged with the worm gear of the worm gear portion 41. The worm shaft 70 is rotatably installed in the housing 10.

The motor 90 is for generating rotation, and the output shaft 91 is connected to the worm shaft 70. In general, an electric motor or a hydraulic motor is used as the motor 90.

On the other hand, referring to Figure 2, the winch 1 according to an embodiment of the present invention, one end portion is rotatable arm 97 and the bobbin portion 51 is installed so as to rotate up and down from the upper portion of the bobbin portion 51. The roller 98 is rotatably installed in contact with the rope wound around the bobbin portion 97 at one end of the pivot arm 97 located at the upper portion of the pivot arm, and the roller 98 is the bobbin portion 51. It is characterized in that it further comprises a pressurizing device (96) having a spring (99) for applying an elastic force to the pivotal arm (97) in the direction of pressing the rope wound on. The pressing device presses the rope toward the center of the bobbin part 51 so that the rope is aligned and wound around the bobbin part 51. Referring to the drawings, the pressing device 96 is fixedly installed on a predetermined fixed structure (7).

In addition, the winch 1 according to an embodiment of the present invention is characterized in that it further comprises a guide 95 which is spaced apart from the outer circumferential surface of the bobbin portion 51 by a predetermined interval. Accordingly, the rope is wound around the bobbin portion 51 without being separated from the bobbin portion 51. Referring to the drawings, the guide 95 is fixedly installed on a predetermined fixed structure (8).

The winch according to the present invention having the configuration as described above has a compact advantage that the clutch is composed of a spline portion integrally formed with the worm wheel and the drum and a sleeve installed in the spline portion, thereby reducing the number of parts and weight of the winch.

In particular, the winch according to the present invention is not only the shape of the housing by being installed on the shaft fixed to the housing and the worm wheel, but also the worm wheel because the spline is formed on the outer peripheral surface of the spline portion and the sleeve is installed on the spline portion The drum has a simple shape and simple assembly.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (3)

A housing having an inlet opened to one side, Support Bracket, A fixed shaft fixed to the support bracket, one end of which is fixed to the housing inside the housing and the other end of which extends to the outside of the housing through an inlet of the housing; A through-hole formed in the center in the axial direction, a worm gear portion, and a first spline portion having a spline formed on an outer circumferential surface of one end portion in the axial direction, wherein the first spline portion faces the inlet of the housing inside the housing; A worm wheel inserted into the through hole and rotatably installed with respect to the fixed shaft; A through-hole formed in the center in the axial direction, a bobbin portion, and a second spline portion having a spline formed on an outer circumferential surface of one end portion in the axial direction, wherein the second spline portion is adjacent to the first spline portion in the housing; The bobbin portion is a drum provided with the fixed shaft inserted in the through-hole so as to be exposed to the outside of the housing between the housing and the support bracket so as to rotate about the fixed shaft; Spline grooves are formed on the inner circumferential surface to engage with the splines of the first spline portion and the second spline portion, and the spline grooves can engage with the splines of the first spline portion and the second spline portion to reciprocate in the axial direction. A sleeve installed to the first spline portion and the second spline portion, Sleeve moving means connected to the sleeve for reciprocating the sleeve; A worm shaft installed inside the housing so that the worm portion is rotatably engaged with the worm gear portion; Winch, characterized in that the output shaft includes a motor connected to the worm shaft. The method of claim 1, The sleeve moving means includes a hydraulic cylinder having a lever connected to the cylinder rod to apply an external force for moving the cylinder rod, one end of which is connected to the cylinder rod of the hydraulic cylinder, and the other end of which is rotatable with respect to the sleeve. A fork connected to the sleeve, The cylinder rod is hydraulically moved so that the spline groove meshes with the spline of the first spline portion and the spline of the second spline portion at the same time, and the spline groove is splined by the external force applied to the lever. The winch, characterized in that it is moved to engage any one of the splices of the second spline portion. The method according to claim 1 or 2, The winch, characterized in that the outlet is formed in the housing.