KR20100089308A - A carrier assembly for travel motor reducer in heavy construction equipment - Google Patents

Abstract

The disclosed invention relates to a travel reducer carrier for heavy construction equipment that can improve the performance of the carrier by reducing local stress concentration on the carrier.

A carrier supporting a plurality of first, second and third planetary gears in a reduction gear housing so as to decelerate rotation with respect to a rotation shaft connected to an output shaft of a traveling motor, wherein the carrier is splined to at least one side of the first, second and third sun gear.

A carrier body having a spline coupling part, a plurality of pin coupling holes and a ring seating part, and being splined to one side of the sun gear through the spline coupling part to rotatably support the planetary gear; A planetary gear fixing member axially coupled to a pin coupling hole formed at one side of the carrier body and rotatably supporting the planetary gear; A pin fixing member coupled to an outer circumferential side of the planetary gear fixing member to fix the planetary gear fixing member; And a mounting thrust ring member configured to be in close contact with one side of the outer surface of the planetary gear fixing member to prevent detachment of the planetary gear fixing member.

Description

Travel reducer carrier for heavy construction equipment {a carrier assembly for travel motor reducer in heavy construction equipment}

The present invention relates to a travel reducer carrier for heavy equipment, and more particularly, to improve the performance of the carrier by reducing the local stress concentration phenomenon applied to the carrier, structurally planetary when installing a plurality of carriers in the reducer housing The present invention relates to a travel reducer carrier for heavy construction equipment which is improved to prevent the gear fixing member from being separated.

In general, heavy construction equipment such as excavators and loaders are equipped with a drive system for driving the lower running body. The traveling device includes a traveling motor which receives hydraulic driving force by an engine and a hydraulic pump to generate a rotational force, and a traveling reducer which rotates the sprocket by appropriately decelerating the rotational force of the traveling motor.

As shown in FIG. 1, the traveling reducer for heavy construction equipment is rotatably coupled to the traveling motor 2 (hereinafter referred to as a hydraulic motor) in which the output shaft 1 is rotatably installed, and the traveling motor 2. A gear reducer housing (4) having a plurality of ring gears (3) mounted on an inner side thereof, connected to the output shaft (1) by a coupling (5), rotated at the same rotational speed, and the first sun gear (6) mounted thereon. Meshed with the rotating shaft 9 and the first, second and third sun gears 6, 7, and 8, respectively, and rotated along the first, second and third sun gears 6, 7, and 8, respectively. And first, second and third planetary gears 13, 14 and 15 rotatably fixed to the first and second carriers 10, 11 and 12.

The first carrier 10 and the second carrier 11, which are installed for rotation and revolution, typically have a spline coupling 17 for spline engagement, and each of the first and second planetary gears 13 and 14 It is rotatably coupled by a planetary gear fixing pin (not shown).

At this time, the aforementioned first carrier 10 is splined to the second sun gear 7 so as to be integrally rotated with the second sun gear 7, and the second carrier 11 is splined to the third sun gear 8. It is coupled and rotated integrally, the third carrier 12 is fixed to the driving motor (2) side.

In addition, the first, second, and third planetary gears 13, 14, and 15 are engaged with the ring gear 3 formed on the inner side of the housing 4.

When the rotary shaft 9 connected to the output shaft 1 is rotated by the driving motor 2, the first sun gear 6 mounted at the end of the rotary shaft 9 is rotated simultaneously and the first sun gear 6 and the first sun gear 6 are rotated. The first planetary gear 13 to be engaged is also rotated. The first planetary gear 13 rotates the first carrier 10 while rotating and rotating along the first sun gear 6.

The first carrier 10 simultaneously rotates the second sun gear 7 which is splined thereto, and the second sun gear 7 rotates the second planetary gear 14. The second planetary gear 14 rotates the second carrier 11 while rotating and rotating.

The second carrier 11 simultaneously rotates the third sun gear 8 that is splined thereto, and the third sun gear 8 rotates the third planetary gear 15. The third planetary gear 15 rotates the ring gear 3 of the housing 4 while rotating.

That is, the rotational force transmitted from the traveling motor 2 to the rotary shaft 9 is decelerated at a predetermined rate via the first, second, and third planetary gears 13, 14, and 15, and then transmitted to the ring gear 3. . Therefore, since the housing 4 is rotated in conjunction with the rotation of the ring gear 3, the equipment can be driven by driving a sprocket (not shown) to be fitted to the housing (4).

However, in the conventional speed reducer for heavy construction equipment, each carrier has to take into account the load generated by the rotation of the planetary gear and the pinned bearing force applied perpendicularly to the axial direction of the planetary gear fixing pin. Local stress concentration is induced in the carrier adjacent to the pin fixing part (T), thereby causing problems such as damage and deterioration in long-term use.

In addition, high load is applied to the spline part of the carrier by the combination of the sun gear during the operation, while the relatively low load is applied to the pin fixing point (T) rather than for the stiffness reinforcement for local stress concentration. In addition, the thickness of the pin fixing part (T) has to be increased, causing unnecessary material waste and cost increase.

Accordingly, the present invention is to solve the above problems,

An object of the present invention is to provide a reducer carrier for heavy construction equipment that can reduce the local stress concentration phenomenon applied to the carrier and maintain the carrier performance even long-term use.

Another object of the present invention is to provide a traveling reducer carrier for heavy construction equipment that can prevent the departure of the planetary gear fixing pin member structurally when installing a plurality of carriers in the reducer housing.

In order to achieve the above object, the present invention,

A carrier supporting a plurality of first, second and third planetary gears in a reduction gear housing so as to decelerate rotation with respect to a rotation shaft connected to an output shaft of a traveling motor, wherein the carrier is splined to at least one side of the first, second and third sun gear.

A carrier body having a spline coupling part, a plurality of pin coupling holes and a ring seating part, and being splined to one side of the sun gear through the spline coupling part to rotatably support the planetary gear;

A planetary gear fixing member axially coupled to a pin coupling hole formed at one side of the carrier body and rotatably supporting the planetary gear;

A pin fixing member coupled to an outer circumferential side of the planetary gear fixing member to fix the planetary gear fixing member; And

It is configured to be mounted to the ring seat portion, in close contact with one side of the outer surface of the planetary gear fixing member, the thrust ring member for preventing the departure of the planetary gear fixing member; characterized in that it comprises a.

The carrier body may include a first carrier body having a ring seating portion extending to the inlet of the pin coupling holes, and a second carrier body having a spline coupling portion formed at a center thereof to be splined to the sun gear. It is characterized by.

Preferably, the pin fixing member is composed of a spring pin, the pin fixing member is inserted into the pin seating portion formed on the outer peripheral side of the planetary gear fixing member, the pin fixing member to the compression thrust ring member It is characterized in that the compression-supported in the longitudinal direction of the planetary gear fixing member.

In addition, the pressurized thrust ring member has a groove recessed to seal a part of the pin coupling hole, and the assembly of the pinned member and the planetary gear fixing member in the longitudinal direction of the planetary gear fixing member during assembly. It is characterized in that the outer portion of the crimp support.

In addition, the traveling reducer carrier for construction equipment according to the present invention,

A driving motor in which the output shaft is rotatably installed;

A rotating shaft coupled to the output shaft;

First, second and third sun gears mounted on the rotating shaft;

First, second and third planetary gears meshed with the sun gears;

First, second and third carriers rotatably supporting the respective planetary gears and having a carrier body selectively splined corresponding to the respective sun gears; And

The carrier is formed on the inner surface and is rotatably coupled to the driving motor, the carrier is supported by the planetary gears and the planetary gears that are engaged with each of the sun gear when the rotary shaft is rotated by the driving motor and the splines coupled to the sun gear In the travel reducer carrier for heavy equipment is installed in the reducer housing that is decelerated and rotated by the driving of

A planetary gear fixing member axially coupled to the pin coupling holes formed in the first and second carriers to rotatably support the planetary gear;

A pin fixing member coupled to an outer circumferential side of the planetary gear fixing member to fix the planetary gear fixing member; And

It is configured to be mounted to the ring seat portion, in close contact with one side of the outer surface of the planetary gear fixing member and is supported on one side of the reducer housing, the compression thrust ring member for preventing the departure of the planetary gear fixing member; do.

Preferably, the compression thrust ring member has frictional contact with the inner surface of the side plate cover of the reducer housing when a relative motion occurs between the reducer housing and the first carrier due to the deceleration drive. It is characterized by being installed.

In addition, a second pressurized thrust ring member is further installed on one side of the second carrier, and the second pressurized thrust ring member is supported in friction contact with the first carrier body during deceleration driving.

Travel reducer carrier for heavy equipment according to the invention,

By receiving the load along the longitudinal direction of the planetary gear fixing member to support the planetary gear, there is an advantage that can reduce the local stress concentration phenomenon applied to the carrier and maintain the carrier performance even for long-term use.

In addition, when assembling in the reducer housing is supported by the carrier body adjacent to the side plate has the advantage that the compression thrust ring member can be structurally maintained without being separated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a partial cross-sectional view schematically showing a conventional speed reducer for heavy construction equipment, FIG. 2 is an exploded perspective view of the speed reducer carrier for construction equipment according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention 4 is a cross-sectional view illustrating a planetary gear fixing pin for a drive reducer carrier, FIG. 4 is a cross-sectional view showing a carrier body for a drive reducer according to an embodiment of the present invention, and FIG. 5 is a compression thrust ring member according to an embodiment of the present invention. FIG. 6 is a partial perspective view schematically showing a state in which the side of the planetary gear fixing member is pressed and supported, FIG. 6 is a partial cross-sectional view schematically showing an installation state inside the traveling reducer housing for construction equipment according to an embodiment of the present invention. FIG. 7A is a diagram illustrating a stress concentration state in a conventional carrier. FIG. 7A is a comparison diagram of stresses applied to a carrier for a reduction gear and a planetary gear fixing member. b is a view showing a stress relaxation state in the carrier according to the present invention.

A plurality of first, second, and three planetary gears 13, 14, and 15 are supported in the reduction gear housing 4 so as to decelerate rotation with respect to the rotation shaft 9 connected to the output shaft 1 of the driving motor 2. In the carrier splined to one side of the 1,2,3 sun gear (6,7,8),

And a spline coupling portion 27, a plurality of pin coupling holes 28 and a ring seating portion 29, and are splined to one side of the first sun gear 6 through the spline coupling portion 27, 1 a carrier main body 23 rotatably supporting a planetary gear 13;

A planetary gear fixing member 20 axially coupled to the pin coupling hole 28 formed at one side of the carrier body 23 to rotatably support the planetary gears 13, 14, and 15;

A pin fixing member 25 coupled to one outer circumference of the planetary gear fixing member 20 to fix the planetary gear fixing member 20; And

It is mounted to the ring seating portion 29, the close contact with one side of the outer surface of the planetary gear fixing member 20, the compression thrust ring member 30 to prevent the departure of the planetary gear fixing member 20; includes; It is configured by.

In addition, the carrier body 23 is splined to be splined to the first carrier body portion 23a and the sun gear 14 having a ring-in mounting portion 29 extending to the inlet of the pin coupling holes 28. The part 27 is comprised including the 2nd carrier main body part 23b formed in the substantially center.

In order to fix the pin fixing member 25, a pin seating portion 26 is formed in one side of the outer circumference of the planetary gear fixing member 20, and the pin fixing is inserted into the pin seating portion 26. The member 25 is preferably constituted by a spring pin.

The pin fixing member 25 is crimped and supported in the longitudinal direction of the planetary gear fixing member 20 by the compression thrust ring member 30.

On the other hand, the pin mounting portion 26 may be formed on one side of the inner circumference of the pin insertion hole 28 formed in the second carrier body portion 23b, and the planetary gear fixing member 20 and the pin insertion separately. The hole 28 may be formed in a groove structure at a portion where the inner circumference is grounded.

Although the pin mounting portion 26 is deformed in various ways, the pin fixing member 25 may be pressed and supported in the longitudinal direction of the planetary gear fixing member 20 by the compression thrust ring member 30 during assembly. It is the same.

The pressing thrust ring member 30 is provided with a recessed portion 30a recessed to seal a part of the pin coupling hole 28, and the assembly portion 30a is the planetary gear fixing member 20 during assembly. The pin fixing member 26 and the planetary gear fixing member 20 in the longitudinal direction of the) performs a crimping function.

Through-holes 21 are formed at substantially centers of the carrier body 23 and the second carrier body 23b, and the ring seating portion 29 is formed such that the compression thrust ring member 30 is inserted therein. It has an annular groove belt structure formed radially with respect to the central axis of the through-hole 21.

The planetary gear fixing member 20 has an oil passage 20c communicating with both side surfaces 20a and 20b, and is preferably formed of a steel pin.

On the other hand, the traveling reducer carrier for construction equipment according to the present invention may be installed in a traveling reducer for construction equipment including an excavator, a loader, a hydraulic shovel, when described with reference to Figure 7, the output shaft (1) rotatably installed A driving motor 2, a rotating shaft 9 coupled to and coupled to the output shaft 1, first, second, and third sun gears 6, 7 and 8 mounted on the rotating shaft 9; And rotatably supporting the first, second and third planetary gears 13, 14 and 15 meshed with the sun gears 6, 7 and 8, and the respective planetary gears 13, 14 and 15. A ring on the inner side and the first, second and third carriers 23, 24, 25 having a carrier body 23a or 24a which is selectively splined corresponding to the respective sun gears 6, 7, 8; Planetary gear 3 is formed and rotatably coupled to the traveling motor 2, the planetary gear is engaged with the sun gear (6, 7, 8) when the rotation shaft 9 is rotated by the driving motor drive Deceleration rotation by driving the carriers 23, 24 and 25 which support the gears 13, 14 and 15 and the planetary gears 13, 14 and 15 and are splined to the sun gears 6, 7, and 8. In the travel reducer carrier for heavy equipment is installed in the reduction gear housing (34),

A planetary gear fixing member 20 axially coupled to the pin coupling hole 28 formed at one side of the first and second carriers 23 and 24 and rotatably supporting the planetary gears 13 and 14;

A pin fixing member 25 coupled to one outer circumferential side of the planetary gear fixing member 20 to fix the planetary gear fixing member 20; And

Is mounted to the ring seating portion 29, but close to one side of the outer surface of the planetary gear fixing member 20 and is supported on one side of the reducer housing 34 to prevent separation of the planetary gear fixing member 20 Compression thrust ring member 30; is configured to include.

Preferably, the compressed thrust ring member 30 has an outer surface of the compressed thrust ring member 30 when relative motion occurs between the reducer housing 34 and the first carrier 23 due to the deceleration driving. The inner surface of the side plate cover 34a of the reducer housing 34 is installed in frictional contact, so that the planetary gear fixing member 20 does not escape outside the carrier body 23 or 24 even if the deceleration drive is performed for a long time. It will continue to be installed.

The pressing thrust ring member 30 is provided with a recessed portion 30a recessed to seal a part of the pin coupling hole 28, and the assembly portion 30a is the planetary gear fixing member 20 during assembly. As described above, the pin fixing member 26 and the planetary gear fixing member 20 are pressed and supported in the longitudinal direction.

On the other hand, in order to support the second planetary gear 14 installed in the second carrier 24, the second compression thrust ring member 40 is further installed on one side of the second carrier body 24, deceleration drive Therefore, when the relative movement occurs between the first carrier 23 and the second carrier 24, the second compression thrust ring member 40 is supported in friction contact with one side of the first carrier body 23a.

In the description of the present invention, the planetary gear fixing member 20 is suitably composed of a pin of steel alloy material, the longitudinal direction of the planetary gear fixing member means the same direction as the central axis of the pin.

Although not shown, the second compression thrust ring member 40 is installed in an annular groove structure on one side of the second carrier 24 to support the fixed state of the second planetary gear 14. 1 Since the compression thrust ring member 30 and the first carrier body 23 is the same as the coupling configuration principle, detailed description thereof will be omitted.

In the traveling reducer carrier for heavy construction equipment according to the present invention, the rotational force transmitted from the traveling motor 2 to the rotary shaft 9 is decelerated at a predetermined rate via the first, second and third planetary gears 13, 14 and 15. After the transmission to the ring gear (3), according to the rotation of the ring gear (3), the housing 34 is interlocked and rotated, according to the driving of the sprocket (not shown) to be fitted to the housing 34, the excavator The principle of driving heavy construction equipment including a loader is the same as in the related art.

Referring to Figure 6, during the deceleration drive for the construction of heavy equipment, the outer side of the planetary gear fixing member 20 and the pin fixing member 26 by the crimping thrust ring member 30 according to the present invention is pressed and supported, at this time The pressing support force of the pressing thrust ring member 30 applied to the pin fixing member 25 made of the spring pin acts along the axial direction of the planetary gear fixing member 20.

Accordingly, the first planetary gear 13 remains fixed without being separated from the carrier body 23.

As shown in FIG. 8, the vertical stress in the longitudinal direction of the planetary gear fixing member 20 at the engagement portion of the planetary gear fixing member 20 and the spring pin 25 mounted on the carrier body 23 is dispersed and canceled. As can be seen, this is an effect of resolving the local stress acting perpendicular to the longitudinal direction of the planetary gear fixing member 20 outside the conventional carrier as shown in FIG.

Accordingly, even if the deceleration drive is performed for a long time, local stress concentration is alleviated, thereby preventing damage to the planetary gear fixing member or damage to the carrier.

On the other hand, when a relative motion occurs between the reducer housing 34 and the first carrier 23 due to the deceleration drive, the outer surface of the compression thrust ring member 30 is the side plate cover 34a of the reducer housing 34. In contact with the inner surface of the friction, even if the deceleration drive is performed for a long time, each carrier body (23, 24) and the planetary gear fixing member 20 is firmly fixed to each of the planetary gears (13, 14) without local stress concentration It can support and maintain a smooth rotational drive.

For example, when applied to the second carrier 24 to support the second planetary gear 14, the second compression thrust ring member 40 is supported on the side of the adjacent first carrier body 23, At this time, the pressing support force of the pressing thrust ring member 30 and the second pressing thrust ring member 40 applied to the pin fixing member 25 made of each spring pin is along the longitudinal direction of the planetary gear fixing member 20. Works.

In general, by using a plurality of carrier extension structures as in the prior art, each of the planetary gear fixing members 20 rotates by a crimping support structure applied in the axial direction of the planetary gear fixing member in accordance with the present invention even when the drive is decelerated. The planetary gears 13 and 14 can maintain a smooth rotational drive for a long time without leaving the carrier outside.

In the above, the present invention has been described in detail with reference to the accompanying drawings and embodiments, the accompanying drawings and the above embodiments are described by way of example to help those of ordinary skill in the art to understand the present invention. It is. Accordingly, the above embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention should be construed in accordance with the invention set forth in the appended claims, the scope of which should be understood by those skilled in the art. Include various changes, alternatives, and equivalents by

1 is a partial cross-sectional view schematically showing a conventional speed reducer for heavy construction equipment,

Figure 2 is an exploded perspective view of a travel reducer carrier for construction equipment according to an embodiment of the present invention,

3 is a cross-sectional view showing a planetary gear fixing pin for a drive reducer carrier according to an embodiment of the present invention;

4 is a cross-sectional view showing a carrier body for a speed reducer according to an embodiment of the present invention;

5 is a partial perspective view schematically showing a state in which the pressurized thrust ring member is pressed against the side surface of the planetary gear fixing member according to an embodiment of the present invention;

Figure 6 is a partial cross-sectional view schematically showing an installation state inside the traveling reducer housing for construction equipment according to an embodiment of the present invention,

FIG. 7 is a comparison diagram of stress analysis applied to a carrier for planetary gearbox and a planetary gear fixing member, and FIG. 7A is a diagram illustrating a stress concentration state in a conventional carrier.

Figure 7b is a view showing a stress relaxation state in the carrier according to the present invention.

*** Explanation of symbols for main parts of drawing ***

1: output shaft 2: rotary shaft

6,7,8: 1st, 2nd, 3rd sun gear 13,14,15: 1st, 2nd, 3rd planetary gear

20: planetary gear fixing member 25: pin fixing member

23, 24: first and second carriers 29: ring seat

30: presser thrust ring member 40: second presser thrust ring member

34a: side plate of reducer housing

Claims (7)

A carrier supporting a plurality of first, second and third planetary gears in a reduction gear housing so as to decelerate rotation with respect to a rotation shaft connected to an output shaft of a traveling motor, wherein the carrier is splined to at least one side of the first, second and third sun gear. A carrier body having a spline coupling part, a plurality of pin coupling holes and a ring seating part, and being splined to one side of the sun gear through the spline coupling part to rotatably support the planetary gear; A planetary gear fixing member axially coupled to a pin coupling hole formed at one side of the carrier body and rotatably supporting the planetary gear; A pin fixing member coupled to an outer circumferential side of the planetary gear fixing member to fix the planetary gear fixing member; And A driving reducer carrier for heavy construction equipment, comprising a ring thrust ring member configured to be mounted to the ring seating portion, to close one side of the outer surface of the planetary gear fixing member to prevent the planetary gear fixing member from being separated. . The method according to claim 1, The carrier body includes a first carrier body portion having a ring seating portion extending to the inlet of the pin coupling holes and a second carrier body portion having a spline coupling portion formed in a center thereof so as to spline and couple to the sun gear. A reduction gear carrier for heavy construction equipment, characterized in that. The method according to claim 1, The pin fixing member is composed of a spring pin, the pin fixing member is inserted into the pin seating portion formed on the outer peripheral side of the planetary gear fixing member, the pin fixing member is the planetary gear by the compression thrust ring member The driving reducer carrier for heavy construction equipment, characterized in that the pressing member is supported in the longitudinal direction of the fixing member. The method according to claim 3, The pressurized thrust ring member has a groove recessed to seal a part of the pin coupling hole, and the assembly of the crushed thrust ring member in the longitudinal direction of the planetary gear fixing member to the outside of the pin fixing member and the planetary gear fixing member. A reduction gear carrier for heavy construction equipment, characterized by crimping and supporting a portion. A driving motor in which the output shaft is rotatably installed; A rotating shaft coupled to the output shaft; First, second and third sun gears mounted on the rotating shaft; First, second and third planetary gears meshed with the sun gears; First, second and third carriers rotatably supporting the respective planetary gears and having a carrier body selectively splined corresponding to the respective sun gears; And The carrier is formed on the inner surface and is rotatably coupled to the driving motor, the carrier is supported by the planetary gears and the planetary gears that are engaged with each of the sun gear when the rotary shaft is rotated by the driving motor and the splines coupled to the sun gear In the travel reducer carrier for heavy equipment is installed in the reducer housing that is decelerated and rotated by the driving of A planetary gear fixing member axially coupled to the pin coupling holes formed in the first and second carriers to rotatably support the planetary gear; A pin fixing member coupled to an outer circumferential side of the planetary gear fixing member to fix the planetary gear fixing member; And It is configured to be mounted to the ring seat portion, in close contact with one side of the outer surface of the planetary gear fixing member and is supported on one side of the reducer housing, the compression thrust ring member for preventing the departure of the planetary gear fixing member; Speed reducer carrier for heavy construction equipment. The method according to claim 4, The compression thrust ring member may be installed in friction contact with the inner surface of the side plate cover of the reducer housing when the relative motion occurs between the reducer housing and the first carrier due to the reduction gear. Drive reducer carrier for heavy construction equipment. The method according to claim 4, A second compression thrust ring member is further installed on one side of the second carrier, and the second reduction thrust ring member is supported in friction contact with the first carrier body during deceleration driving. .

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