JP2018017392A - Planetary gear mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planetary gear mechanism capable of reducing a load of a carrier pin supporting the planetary gear.SOLUTION: A planetary gear mechanism of this invention has a first carrier main body and a second carrier main body for supporting each of a first end part and a second end part of a carrier pin. The first carrier main body is provided with a first supporting hole and a first stopper surface. The second carrier main body is provided with a second supporting hole and a second stopper surface. The first carrier main body and the second carrier main body are separably connected to each other under a state in which a first end part of the carrier pin is engaged in the first supporting hole, the second end part of the carrier pin is engaged in the second supporting hole, and a second abutting surface facing to the other side in the axial line direction of the carrier pin is engaged with the second stopper surface.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a planetary gear mechanism.

  The planetary gear mechanism is widely used in HMTs and the like that are applied to a traveling system transmission path of a working vehicle such as a combine or a tractor (see Patent Document 1 below).

  However, in the conventional planetary gear mechanism, a large load is applied to the carrier pin, which is one component, and there is room for improvement in this regard.

  That is, the planetary gear mechanism includes a sun gear, a planetary gear that meshes with the sun gear, an internal gear that meshes with the planetary gear, and the planetary gear so as to be rotatable about an axis and around the sun gear of the planetary gear. And a carrier that rotates around the axis of the sun gear in conjunction with the revolution.

  The carrier includes a carrier pin that supports the planetary gear so as to be rotatable about an axis, and a carrier gear that supports the carrier pin so as to rotate around the axis of the sun gear together with the revolution of the planetary gear around the sun gear. Yes.

  Here, in the planetary gear mechanism described in Patent Document 1, the carrier pin supports the planetary gear on the other side in the axial direction with the one side in the axial direction inserted and supported in a support hole formed in the carrier gear. The carrier pin itself is subjected to a large load.

  In general, the carrier pin is prevented from coming out of the support hole by a retaining pin that is detachably attached to the carrier pin, and a large load is applied to the retaining pin.

Japanese Patent No. 4988111

  The present invention has been made in view of the prior art, and an object of the present invention is to provide a planetary gear mechanism that can reduce a load on a carrier pin that supports a planetary gear.

  In order to achieve the above object, the first aspect of the present invention is to support a sun gear, a planetary gear meshing with the sun gear, an internal gear meshing with the planetary gear, and the planetary gear rotatably around an axis. And a planetary gear mechanism having a carrier that rotates about the axis of the sun gear in conjunction with the revolution of the planetary gear about the sun gear, the carrier comprising a carrier pin that rotatably supports the planetary gear about the axis. A first end portion on one side in the axial direction and a second end portion on the other side in the axial direction of the carrier pin so as to rotate around the axis of the sun gear together with the revolution of the planetary gear around the sun gear. And a second carrier body, wherein the first carrier body is provided with a first support hole and a first stop surface, and the second carrier body has a second support hole and 2 stop surfaces are provided, and the first and second carrier bodies have a first abutment in which the first end of the carrier pin is engaged with the first support hole and faces one side in the axial direction of the carrier pin. A second engaging surface is engaged with the first stop surface, a second end of the carrier pin is engaged with the second support hole, and a second abutting surface facing the other axial direction of the carrier pin is the second A planetary gear mechanism is provided that is separably connected to each other while being engaged with a stop surface.

In the first mode, the first support hole has an axial inner end side close to the second carrier body that opens on a surface facing the second carrier body and an axis opposite to the second carrier body. The outer end side in the direction has a hole portion that terminates within the axial thickness of the first carrier body, and a bottom surface that extends radially inward from the outer end side in the axial direction of the hole portion. The axially inner end side close to the first carrier body opens to the surface facing the first carrier body, and the axially outer end side opposite to the first carrier body is the axial thickness of the second carrier body. And a bottom surface extending radially inward from the axially outer end side of the hole.
In the first embodiment, the end surfaces on one side and the other side in the axial direction of the carrier pin act as the first and second contact surfaces, respectively, and the bottom surfaces of the first and second support holes respectively , Acting as the first and second stop surfaces.

In the first embodiment, preferably, at least one of the first and second carrier bodies is provided with an oil hole.
The oil hole extends from the radially inner end of the bottom surface of the corresponding support hole to the outer end side in the axial direction, and is opened on the rear surface of the corresponding carrier body.

  Preferably, the carrier pin may have a lubricating oil hole that opens to an end surface in the axial direction so as to face the oil hole and opens to a region of the outer peripheral surface that supports the planetary gear.

Preferably, the lubricating oil hole includes an axial hole that opens on one end surface and the other end surface in the axial direction, and a radial hole that opens on the outer peripheral surface at one end side and the other end side in communication with the axial hole. Including
The carrier pin is fixed to at least one of the first and second carrier bodies so that the radial hole cannot rotate about its axis in a state along the radial direction with respect to the rotation center of the sun gear. .

More preferably, the oil hole is provided in both the first and second carrier bodies.
That is, the first carrier body extends from the radially inner end of the bottom surface of the first support hole to the axially outer end side and opens on the back surface of the first carrier body opposite to the second carrier body. A first oil hole is provided, and the second carrier body extends from the radially inner end of the bottom surface of the second support hole to the axially outer end side, and the first carrier body of the second carrier body Is provided with a second oil hole that opens on the opposite back surface.

  In this case, the lubricating oil hole provided in the carrier pin opens on the end face on one axial side so as to face the first oil hole, and opens on the other end face in the axial direction so as to face the second oil hole. At the same time, the outer peripheral surface is formed so as to open to a region supporting the planetary gear.

  In the second form, the carrier pin includes a large-diameter portion at the center in the axial direction, a first small-diameter portion extending from the large-diameter portion to one side in the axial direction along with the first step portion, It has a 2nd small diameter part extended to an axial direction other side with a 2 step part.

  In this case, the first support hole has an opening width into which the large-diameter portion is engaged, and an axially inner end side close to the second carrier body opens to a surface facing the second carrier body. An axially outer end opposite to the second carrier body has a first large-diameter hole that terminates within an axial thickness of the first carrier body, and an axially outer end of the first large-diameter hole. A first bottom surface extending inward in the radial direction, and an opening extending from the radial inner end portion of the first bottom surface toward the axial outer end side, having a smaller diameter than the large diameter portion and engaging the first small diameter portion. A first small-diameter hole having a width.

  The second support hole has an opening width into which the large-diameter portion is inserted, an axially inner end side close to the first carrier body opens to a surface facing the first carrier body, and the second support hole A second large-diameter hole portion having an axially outer end opposite to the one carrier body terminates within an axial thickness of the second carrier body, and a radial direction from the axially outer end side of the second large-diameter hole portion. A second bottom surface extending inward, and extending from a radially inner end portion of the second bottom surface to an axially outer end side, having an opening width smaller than the large diameter portion and into which the second small diameter portion is engaged. The second small diameter hole portion is included.

  In the second embodiment, the first step portion serves as the first contact surface and the first bottom surface serves as the first stop surface, while the second step portion serves as the second contact surface. And the second bottom surface acts as the second stop surface.

  Preferably, the first small-diameter hole portion has an axially outer end opened on the back surface of the first carrier body, and the second small-diameter hole has an axially outer end side opened on the back surface of the second carrier body.

  In the various configurations, the first carrier body is a first radially extending portion that extends in the radial direction with respect to the axis of the planetary gear mechanism, and has a central hole along the axial direction at the center in the radial direction. A first radially extending portion having the first support hole and the first stop surface, and a hollow first extending in an axial direction from a radially inner end of the first radially extending portion. And the second carrier body is a second radially extending portion that extends in the radial direction with respect to the axis of the planetary gear mechanism, the second support hole, and the second carrier body. A second radially extending portion provided with a stop surface and a hollow second cylindrical portion extending in the axial direction from a radially central portion of the second radially extending portion.

In the various configurations, preferably, the first and second carrier bodies are directly connected to the end surfaces on one side and the other side in the axial direction of the sun gear in a state where the first and second carrier bodies are connected, respectively. Alternatively, first and second sandwiching surfaces that are indirectly engaged are provided.
In this case, the sun gear is held in the axial direction while being relatively rotatable around the axis by the first and second holding surfaces.

  In order to achieve the above object, the second aspect of the present invention includes a sun gear, a planetary gear meshing with the sun gear, an internal gear meshing with the planetary gear, and the planetary gear rotatable about an axis. A planetary gear mechanism having a carrier that supports and rotates around the axis of the sun gear in conjunction with the revolution of the planetary gear around the sun gear, the carrier supporting the planetary gear rotatably around the axis. A carrier pin, a carrier body that supports the carrier pin so as to rotate around an axis of the sun gear together with the revolution of the planetary gear around the sun gear, and a carrier cover that is detachably connected to the carrier body, The carrier pin is interposed between first and second ends located on one side and the other side in the axial direction, respectively, and the first and second ends. An intermediate portion for supporting the planetary gear, and first and second contact surfaces facing the one side and the other side in the axial direction, respectively, and the carrier body is located on one side in the axial direction from the planetary gear, A first end wall provided with a first support hole for supporting the first end portion of the carrier pin; and provided radially inward of the first end wall to allow the sun gear to be inserted in the axial direction. A central opening, a second end wall located on the other axial side of the planetary gear, and a connecting portion for connecting the first and second end walls, the second end wall being the carrier pin A second support hole for supporting the second end of the main body, a body-side stop surface engaged with the second contact surface of the carrier pin, and an end surface on the other axial side of the sun gear directly or indirectly engaged And a carrier-side clamping surface, wherein the carrier cover is a first part of the carrier body. A wall portion that is detachably connected to one side in the axial direction of the end wall; and a cylindrical portion that extends in the axial direction from a radially inner end portion of the wall portion and through which a rotating shaft connected to the sun gear is inserted. The wall portion is directly or indirectly connected to a cover-side stop surface that engages with the first contact surface of the carrier pin supported by the first support hole, and an end surface on one side in the axial direction of the sun gear. A planetary gear mechanism is provided that has a cover-side pinching surface that engages with the main body-side pinching surface so as to relatively freely rotate the sun gear around an axis.

In the first mode, the second support hole has an axial inner end that is close to the first end wall and is open on a surface facing the first end wall, and an axis that is opposite to the first end wall. A direction outer end side may have a hole portion that terminates within an axial thickness of the second end wall, and a bottom surface that extends radially inward from the axial outer end side of the hole portion.
In this case, the end surface on the other axial side of the carrier pin acts as the second contact surface, and the bottom surface of the second support hole acts as the main body side stop surface.

In the second mode, the carrier pin is configured such that the second end portion has a diameter smaller than that of the intermediate portion and extends from the intermediate portion to the other side in the axial direction along with a stepped portion. The first end wall in the second end wall has an opening width in which the second end portion can be engaged and has an opening width that is smaller than the intermediate portion, and the inner end side in the axial direction close to the first end wall is the second end wall It is supposed to open on the opposite surface.
In this case, the step portion acts as the second contact surface, and the surface of the second end wall facing the first end wall acts as the main body side stop surface.

  In the various configurations, preferably, the carrier pin is in communication with the axial hole and an axial hole that opens in at least one of the first end surface on one side in the axial direction and the second end surface on the other side. Lubricating oil holes including one end and a radial hole that opens to the outer peripheral surface of the intermediate portion are provided, and at least one of the second end wall of the carrier body and the wall portion of the carrier cover has one end An oil hole is provided which opens on the surface facing the carrier pin and has the other end opened on the back surface so that the side faces the opening of the axial hole.

  More preferably, the carrier pin is provided on at least one of the carrier body and the carrier cover so that the radial hole cannot rotate about its axis in a state along the radial direction with respect to the rotation center of the sun gear. Fixed around the axis.

In the various configurations, preferably, the connecting portion is a plurality of connecting pieces arranged in a circumferential direction, and the first and second end walls are respectively interposed between the planetary gears adjacent in the circumferential direction. It may have a plurality of connecting pieces to be connected.
In this case, the carrier body has an access opening through which the planetary gear can be inserted between the connecting pieces adjacent in the circumferential direction, and the planetary gear is engaged with the sun gear through the access opening. A tooth portion of the planetary gear is configured to extend radially outward from the access opening.

  According to the planetary gear mechanism of the first aspect of the present invention, the carrier rotates around the axis of the sun gear together with the carrier pin that rotatably supports the planetary gear and the revolution of the planetary gear around the sun gear. The carrier pin includes first and second carrier bodies that respectively support a first end portion on one axial side of the carrier pin and a second end portion on the other axial side, and the first carrier body has a first support hole. And a first stop surface, and the second carrier body is provided with a second support hole and a second stop surface, and the first and second carrier bodies have a first end of the carrier pin. A first contact surface engaged with the first support hole and facing one side in the axial direction of the carrier pin is engaged with the first stop surface, and a second end portion of the carrier pin is connected to the second support hole. And the carrier pin Since the second contact surface facing the other side in the axial direction is engaged with the second stop surface so as to be separable from each other, the carrier pin is cantilevered. In comparison, the load on the carrier pin can be reduced.

  Further, according to the first aspect of the present invention, the carrier pin comes off to one side in the axial direction because the first contact surface of the carrier pin contacts the first stop surface of the first carrier body. And the second contact surface of the carrier pin contacts the second stop surface of the second carrier body, thereby preventing the carrier pin from coming off to the other side in the axial direction. The carrier pin can be prevented from coming off without applying an excessive load to a specific member such as the retaining pin.

  According to the planetary gear mechanism according to the second aspect of the present invention, the carrier supports the planetary gear so as to be rotatable about the axis and has first and second contact surfaces facing the one side and the other side in the axial direction. A carrier body supporting a first end portion on one side in the axial direction and a second end portion on the other side in the axial direction of the carrier pin so as to rotate around the axis line of the sun gear together with the revolution of the planetary gear around the sun gear. A carrier cover detachably coupled to the carrier body, the carrier body having a first end wall provided with a first support hole for supporting a first end of the carrier pin; A central opening that is provided radially inward of one end wall and allows the sun gear to be inserted in an axial direction; a second support hole that supports a second end of the carrier pin; Contact surface A second end wall provided with a main body side holding surface that engages directly or indirectly with a main body side stop surface and an end surface on the other axial side of the sun gear; and the first and second end walls. A carrier-side stop surface that engages with a first contact surface of the carrier pin supported by the first support hole, and an axially one side of the sun gear. A carrier-side holding surface that engages directly or indirectly with the end surface and holds the sun gear so as to be relatively rotatable about an axis while cooperating with the body-side holding surface. The load applied to the carrier pin can be reduced as compared with the conventional configuration in which the pin is cantilevered.

  Further, according to the second aspect of the present invention, the first contact surface of the carrier pin contacts the cover-side stop surface of the carrier cover, thereby preventing the carrier pin from coming off to one side in the axial direction. In addition, since the second contact surface of the carrier pin is in contact with the main body side stop surface of the carrier body, the carrier pin is prevented from coming off to the other side in the axial direction. The carrier pin can be prevented from coming off without applying an excessive load to the specific member such as the above.

FIG. 1 is a perspective view showing a state in which an HMT unit including a planetary gear mechanism according to Embodiment 1 of the present invention is attached to a transmission. FIG. 2 is a developed sectional view of the HMT unit and the transmission. FIG. 3 is an exploded cross-sectional view of the HMT unit separated from the transmission. FIG. 4 is a cross-sectional view of the HMT unit taken along line IV-IV in FIG. FIG. 5 is a sectional view of the planetary gear mechanism according to the first embodiment of the present invention. FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is an exploded sectional view of the planetary gear mechanism shown in FIG. FIG. 9 is a cross-sectional view of the planetary gear mechanism according to Embodiment 2 of the present invention. FIG. 10 is an exploded cross-sectional view of the planetary gear mechanism shown in FIG. FIG. 11 is a cross-sectional view of the planetary gear mechanism according to Embodiment 3 of the present invention. FIG. 12 is an exploded sectional view of the planetary gear mechanism shown in FIG. FIG. 13 is an exploded perspective view of the planetary gear mechanism shown in FIGS. 11 and 12. FIG. 14 is a partial cross-sectional view of a planetary gear mechanism according to a modification of the third embodiment.

Embodiment 1
Hereinafter, an embodiment of a planetary gear mechanism according to the present invention will be described with reference to the accompanying drawings.
FIGS. 1 and 2 are a perspective view and a developed sectional view showing a state in which the HMT unit 1 including the planetary gear mechanism 100 according to the present embodiment is mounted on the transmission 500, respectively.
3 is an exploded exploded sectional view of the HMT unit 1 separated from the transmission 500, and FIG. 4 is a sectional view of the HMT unit 1 taken along line IV-IV in FIG.

  As shown in FIGS. 1 to 4, the HMT unit 1 includes an HST 10 that continuously rotates and outputs a rotational power input from a drive source (not shown), a rotational power from the drive source, and the HST 10. The planetary gear mechanism 100 according to the present embodiment that combines and outputs rotational power from the HST 10 and the HST 10 and the planetary gear mechanism 100 are accommodated in a mounting position (the transmission 500 in the illustrated example). And a housing 200 connected to the housing.

  As shown in FIGS. 2 and 4, the HST 10 includes a pump shaft 20 that is operatively rotated by a drive source, a hydraulic pump 25 that is supported on the pump shaft 20 so as not to rotate relative thereto, and the hydraulic pump 25. At least one of a hydraulic motor 35 that is fluidly connected to the hydraulic motor 35 and is hydraulically driven by the hydraulic pump 25, a motor shaft 30 that supports the hydraulic motor 35 in a relatively non-rotatable manner, and the hydraulic pump 25 and the hydraulic motor 35. The volume changing member 40 that continuously changes the ratio of the output rotational speed output from the motor shaft 30 to the input rotational speed input to the pump shaft 20 (that is, the gear ratio by HST) by changing the volume of the pump shaft 20. And have.

  In the present embodiment, the HST 10 uses, as the volume changing member 40, a pump side movable swash plate 40 (P) that changes the volume of the hydraulic pump 25 and a motor side movable diagonal that changes the volume of the hydraulic motor 35. It has a plate 40 (M).

FIG. 5 shows an enlarged cross-sectional view of the planetary gear mechanism 100 according to the present embodiment.
6 is a cross-sectional view taken along line VI-VI in FIG. 5, and FIG. 7 is a cross-sectional view taken along line VII-VII in FIG.

  As shown in FIG. 5 and the like, the planetary gear mechanism 100 includes a sun gear 110, a planetary gear 120 that meshes with the sun gear 110, an internal gear 130 that meshes with the planetary gear 120, and the planetary gear 120 around its axis. And a carrier 150 that rotatably supports and rotates about the axis of the sun gear 110 in conjunction with the revolution of the planetary gear 120 around the sun gear 110.

  In the planetary gear mechanism 100, one of the planetary three elements of the sun gear 100, the carrier 150 and the internal gear 130 acts as a variable input element, and the other element acts as a constant input element. The remaining one element acts as a combined rotational power output element.

  In the present embodiment, the sun gear 100 is supported on the motor shaft 30 so as not to rotate relative to the motor shaft 30 and acts as a variable input element, the internal gear 130 acts as a constant speed input element, and the carrier 150 is combined and rotated. Acts as a power output element.

  As shown in FIG. 5, in the present embodiment, the carrier 150 includes a carrier pin 160 that supports the planetary gear 120 so as to be rotatable about an axis, and the revolution of the planetary gear 120 around the sun gear 110 together with the sun gear. A first end and a second end supporting the first end 162 (1) on one side in the axial direction and the second end 162 (2) on the other side in the axial direction of the carrier pin 160 so as to rotate around the axis of 110, respectively. It has carrier bodies 170 (1) and 170 (2).

  The first carrier body 170 (1) has a first support hole 172 (1) into which the first end 162 (1) of the carrier pin 160 is inserted, and a first end 162 ( 1) The first stop surface 175 (1) that engages with the first contact surface 165 (1) facing the one side in the axial direction of the carrier pin 160 in a state where the first support hole 172 (1) is inserted. And are provided.

  Meanwhile, the second carrier body 170 (2) has a second support hole 172 (2) into which the second end 162 (2) of the carrier pin 160 is inserted, and a second end of the carrier pin 160. A second stop surface 175 (engaged with a second contact surface 165 (2) facing the other axial direction of the carrier pin 160 with the 162 (2) being inserted into the second support hole 172 (2). 2).

  The first and second carrier bodies 170 (1) and 170 (2) have the first end 162 (1) engaged with the first support hole 172 (1) and the first contact surface 165. (1) is engaged with the first stop surface 175 (1), the second end 162 (2) is engaged with the second support hole 172 (2), and the second contact surface 165 ( 2) are connected to the second stop surface 175 (2) so as to be separable from each other via a fastening member 178.

  According to the planetary gear mechanism 100 having such a configuration, the load applied to the carrier pin 160 and the retaining structure of the carrier pin 160 can be effectively reduced, and the durability can be improved.

That is, in the conventional planetary gear mechanism, the carrier pin is in a cantilever support state in which the one side in the axial direction is inserted and supported in the support hole formed in the carrier body such as the carrier gear, and the planetary gear is supported on the other side in the axial direction. It is said that.
In such a conventional configuration, a large load is applied to the carrier pin itself.

  In the conventional planetary gear mechanism, the carrier pin is generally prevented from coming out of the support hole by a retaining pin that is detachably attached to the carrier pin. A large load is applied in the shear direction.

On the other hand, in the present embodiment, the carrier pin 160 has the first and second ends 162 (1) and 162 (2) having the first support holes 172 of the first carrier body 170 (1). (1) and in the both-end support state inserted into the second support hole 172 (2) of the second carrier body 170 (2), the first and second ends 162 (1), 162 (2) The planetary gear 120 is supported by an intermediate portion 163 therebetween.
Therefore, the load applied to the carrier pin 160 can be effectively reduced.

Further, in the present embodiment, the first contact surface 165 (1) contacts the first stop surface 175 (1), so that the carrier pin 160 is prevented from coming off to one side in the axial direction. Further, the second contact surface 165 (2) contacts the second stop surface 175 (2), so that the carrier pin 160 is prevented from coming off to the other side in the axial direction.
Therefore, the carrier pin 160 can be prevented from coming off without imposing an excessive load on a specific member such as the retaining pin.

FIG. 8 shows an exploded sectional view of the planetary gear mechanism 100.
In the present embodiment, as shown in FIG. 8, the first support hole 172 (1) has an axially inner end adjacent to the second carrier body 170 (2) on the second carrier body 170 (2). ) To the surface 170a (1) opposite to the second carrier body 170 (2), and the axially outer end side opposite to the second carrier body 170 (2) terminates within the axial thickness of the first carrier body 170 (1). Part 173 (1) and a bottom face 174 (1) extending radially inward from the axially outer end side of the hole 173 (1).

  Similarly, the second support hole 172 (2) has an axially inner end that is close to the first carrier body 170 (1) and is open to a surface 170a (2) facing the first carrier body 170 (1). And a hole 173 (2) whose outer end in the axial direction opposite to the first carrier body 170 (1) ends within the axial thickness of the second carrier body 170 (2), and the hole 173. A bottom surface 174 (2) extending radially inward from the axially outer end side of (2).

  The first end 162 (1) of the carrier pin 160 is arranged such that the end surface 164 (1) on one axial side is in contact with the bottom 174 (1) of the first support hole 172 (1). The second end 162 (2) of the carrier pin 160 is inserted into the hole 173 (1) of the first support hole 172 (1), and the end surface 164 (2) on the other side in the axial direction is the second end 164 (2). The second support hole 172 (2) is inserted into the hole 173 (2) so as to be in contact with the bottom surface 174 (2) of the support hole 172 (2).

  That is, in the present embodiment, the end surfaces 164 (1) and 164 (2) on one side and the other side in the axial direction of the carrier pin 160 are the first and second contact surfaces 165 (1) and 165, respectively. 165 (2), and the bottom surfaces 174 (1) and 174 (2) of the first and second support holes 172 (1) and 172 (2) are respectively connected to the first and second stop surfaces 175 ( 1) Acts as 175 (2).

In the planetary gear mechanism 100, an oil hole is provided in at least one of the first and second carrier bodies 170 (1) and 170 (2).
In the present embodiment, as shown in FIGS. 5 to 8, oil holes are provided in both the first and second carrier bodies 170 (1) and 170 (2).

  Specifically, as shown in FIGS. 5 to 8, the first carrier body 170 (1) has an axially outer end extending from the radially inner end of the bottom surface 174 (1) of the first support hole 172 (1). A first oil hole 176 (1) that extends to the side and opens on the back surface 170b (1) of the first carrier body 170 (1) opposite to the second carrier body 170 (2) is provided.

  Similarly, the second carrier body 170 (2) extends from the radially inner end of the bottom surface 174 (2) of the second support hole 172 (2) to the axially outer end side to extend to the second carrier body 170. A second oil hole 176 (2) is provided in the back surface 170b (2) opposite to the first carrier body 170 (1) of (2).

  By providing the first and second oil holes 176 (1) and 176 (2), the oil stored in the portion of the housing 200 that houses the planetary gear mechanism 100 can be stored in the carrier pin 160. The first and second ends 162 (1) and 162 (2) can be effectively guided.

Further, in the planetary gear mechanism 100, the carrier pin 160 opens to the end surface 164 (1) on one axial side so as to face the first oil hole 176 (1) and the second oil hole 176 (2 ) Is provided on the other end surface 164 (2) on the other side in the axial direction, and a lubricating oil hole 166 is also provided in the outer peripheral surface of the region supporting the planetary gear 120.
By providing the lubricating oil hole 166, the lubricating oil can be effectively guided to the entire planetary gear mechanism 100.

  When the oil holes 176 (1) and 176 (2) are provided in only one of the first and second carrier bodies 170 (1) and 170 (2), the lubricating oil hole 166 is The outer peripheral surface is formed so as to open to at least one axial direction opposite to the oil hole in a state where the outer peripheral surface is opened in a region supporting the planetary gear 120.

Further, in the planetary gear mechanism 100, the following configuration is adopted in order to smoothly supply the lubricating oil to the entire planetary gear mechanism 100.
That is, as shown in FIGS. 5 to 8, the lubricating oil hole 166 includes an axial hole 166a that opens on the end surfaces 164 (1) and 164 (2) on one axial side and the other axial side, and the axial hole 166a. One end side and the other end side in a state of being communicated with each other include a radial hole 166b that opens to the outer peripheral surface.

  The carrier pin 160 has the first and second carrier bodies 170 (1) such that the radial hole 166b is held in a posture along the radial direction R with respect to the rotation center of the sun gear 110. , 170 (2) is fixed so as not to rotate about the axis.

  In the present embodiment, as shown in FIGS. 5 to 8, the carrier pin 160 is provided with a non-rotating pin 168 extending in the radial direction, and the first carrier body 170 (1) The non-rotating pin 168 is engaged with the holding groove 171 formed on the surface (the surface 170a (1) facing the second carrier body 170 (2)), so that the radial hole 166b becomes the planetary gear. In the state along the radial direction R of the mechanism 100, rotation of the carrier pin 160 around the axis is prevented.

  By providing such a configuration, the lubricating oil introduced into the axial hole 166a during the rotational operation of the carrier 150 is distributed along the entire radial direction of the planetary gear mechanism 100 through the radial hole 166b. It can be diffused smoothly.

  As described above, the carrier pin 160 is prevented from coming off in the thrust direction by engaging the first contact surface 165 (1) and the first stop surface 175 (1) and the second contact. Since the rotation is performed by the engagement of the surface 165 (2) and the second stop surface 175 (2), the anti-rotation pin 168 is not required to be strong enough to prevent the carrier pin 160 from coming off. Only a strength that can prevent rotation of the pin 160 around the axis is sufficient.

  As shown in FIG. 5, in the present embodiment, the first carrier body 170 (1) extends in the radial direction with respect to the axis of the planetary gear mechanism 100 and extends in the radial direction at the center in the radial direction. A first radially extending portion 180 (1) having a central hole; and a hollow first cylindrical portion 185 (1) extending in the axial direction from a radially inner end of the first radially extending portion. The first support hole 172 (1) and the first stop surface 175 (1) are provided in the first radially extending portion 180 (1).

  More specifically, the first radially extending portion 180 (1) has one side in the axial direction of the sun gear 110 in addition to the first support hole 172 (1) and the first stop surface 175 (1). A first sandwiching surface 182 (1) is provided that engages directly or indirectly with the end surface of the first holding surface.

  The first carrier body 170 (1) rotates to the housing 200 (the partition wall 225 in the illustrated embodiment) via a bearing member 226 (1) disposed on the outer periphery of the first cylindrical portion 185 (1). It is supported freely.

  The second carrier body 170 (2) includes a second radially extending portion 180 (2) extending in the radial direction with respect to the axis of the planetary gear mechanism 100 and the second radially extending portion 180 (2). ) And a hollow second cylindrical portion 185 (2) extending in the axial direction from the radial center portion, and the second support hole 172 (2) and the second stop surface 175 (2) are the second diameter. It is provided in the direction extending part 180 (2).

  More specifically, the second radially extending portion 180 (2) includes the second support hole 172 (2) and the second stop surface 175 (2), as well as the other axial side of the sun gear 110. A second sandwiching surface 182 (2) is provided that engages directly or indirectly with the end surface.

  As shown in FIGS. 5 and 8, in a state where the first and second carrier bodies 170 (1) and 170 (2) are connected, the sun gear 110 has the first and second holding surfaces 182 (1 ), 182 (2), it is held in the axial direction while being relatively rotatable about the axis.

The second carrier body 170 (2) is connected to the housing 200 (the support wall 255 shown below in the illustrated embodiment) via a bearing member 256 (2) disposed on the outer periphery of the second cylindrical portion 185 (2). It is supported rotatably.
The internal gear 130 is rotatably supported on the outer periphery of the second cylindrical portion 185 (2) via a bearing member 136.

  In the present embodiment, the motor shaft 30 passes through the central hole of the first radially extending portion 180 (1) and the central hole of the first cylindrical portion 185 (1), and the first axial direction is the first. The sun gear 110 reaches between the radially extending portion 180 (1) and the second radially extending portion 180 (2), and the sun gear 110 is in the first and second radially extending portions 180 ( The motor shaft 30 is supported so as not to be relatively rotatable so as to be positioned between 1) and 180 (2).

  As shown in FIGS. 2 and 3, the housing 200 includes an input shaft 310 that inputs rotational power from the drive source in a state of rotating integrally with the pump shaft 20 of the HST 10 around the axis, and the input shaft 310. A constant-speed transmission unit 330 that transmits the rotational power of the engine to a constant-speed input element formed by one of the internal gear 130 and the carrier 150, and an output element formed by the other of the internal gear 130 and the carrier 150. And an output shaft 350 that outputs the combined rotational power to the outside.

  According to the HMT unit 1 having such a configuration, the HST unit 10 and the planetary gear mechanism 100 can be assembled and adjusted by the HMT unit 1 alone without actually mounting the HST 10 and the planetary gear mechanism 100 on a vehicle. Work can be done.

  That is, in the HMT including the HST and the planetary gear mechanism, the constant-speed rotational power is input to the first element among the three elements including the sun gear, the carrier, and the internal gear in the planetary gear mechanism, and the first of the three elements. The continuously variable rotational power output from the HST is input to the two elements, and the combined rotational power is output from the third element among the three elements.

  Therefore, the HST and the planetary gear mechanism are correctly assembled so that the operation amount of the volume changing member of the HST and the rotational speed of the combined rotational power output from the third element of the planetary gear mechanism have a desired relationship. It is necessary to strictly adjust the output.

  In this regard, in the conventional HMT, the planetary gear mechanism is accommodated in a transmission case that accommodates the auxiliary transmission mechanism, while the HST is separated from the planetary gear mechanism on the outer wall surface of the mission case. It is connected.

  In such a conventional configuration, the planetary gear mechanism is incorporated in the transmission case, and the HMT cannot be adjusted unless the HST is mounted on the transmission case. There is a problem of inefficiency.

  On the other hand, according to the HMT unit 1, the assembly work and the adjustment work of the HST 10 and the planetary gear mechanism 100 can be performed by the HMT unit 1 alone, and the work efficiency can be improved.

  In the specification that the combined rotational power of the planetary gear mechanism 100 can be switched between forward and reverse by the output operation of the HST, it is necessary to perform the adjustment work more strictly, and the HMT unit 1 according to the present embodiment has the above-described operation. The effect, that is, the effect that the assembly work and adjustment work of the HMT can be performed by the single HMT unit is particularly effective.

  In the HMT unit, forward / reverse switching of the combined rotational power of the planetary gear mechanism 100 by an HST output operation is possible with the following configuration.

  That is, in the present embodiment, as described above, the HST 10 includes the pump-side movable swash plate 40 (P) and the motor-side movable swash plate 40 (M) as the volume changing member 40. .

  The pump-side movable swash plate 40 (P) stops the rotation of the motor shaft 30 from the reverse rotation direction maximum tilt position that rotates the motor shaft 30 in the reverse rotation direction maximum speed around the pump side swing axis. The motor shaft 30 is tilted between maximum tilt positions in the normal rotation direction that rotate the motor shaft 30 at the highest speed in the normal rotation direction across the neutral position.

  The motor-side movable swash plate 40 (M) is tilted between a first tilt position and a second tilt position set to be more neutral than the first tilt position around the motor-side swing axis. It is configured to be able to.

  In such a configuration, the forward rotation direction maximum tilt position and the reverse rotation direction maximum tilt position of the pump side movable swash plate 40 (P), and the first and second tilts of the motor side movable swash plate 40 (M). The position and the gear ratio of the planetary gear mechanism 100 are the maximum in the reverse rotation direction of the pump-side movable swash plate 40 (P) in a state where the motor-side movable swash plate 40 (M) is held at the first tilt position. In response to the tilt from the tilt position to the maximum tilt position in the forward rotation direction, the rotational speed of the combined rotational power output from the planetary gear mechanism 100 is steplessly changed from zero to the maximum speed in the forward rotation direction, and The tilt of the motor-side movable swash plate 40 (M) from the first tilt position to the second tilt position in a state where the pump-side movable swash plate 40 (P) is held at the maximum tilt position in the reverse rotation direction. Accordingly, the rotational speed of the combined rotational power of the planetary gear mechanism 100 is zero. In this way, the rotational speed of the planetary gear mechanism 100 can be switched between the highest speed in the reverse direction and the highest speed in the forward direction. Moreover, continuously variable transmission is possible.

  In this configuration, even when the pump-side movable swash plate 40 (P) is positioned at the neutral position and the output of the HST 10 (rotational speed of the motor shaft 30) is zero, the combined rotation of the planetary gear mechanism 100 is performed. The power has a predetermined rotational speed in the forward direction, and the pump-side movable swash plate 40 (P) is at the maximum tilt position in the reverse rotation direction, and the motor-side movable swash plate 40 (M) is at the first tilt position. When the HST 10 is in a predetermined output state, the combined rotational power of the planetary gear mechanism 100 becomes zero and the vehicle is stopped.

  Therefore, it is necessary to perform the assembling work and the adjusting work of the HST 10 and the planetary gear mechanism 100 more strictly. In such a specification, the HMT unit 1 according to the present embodiment is particularly useful.

  In this way, since the HMT unit 1 can switch the rotation direction of the output rotational power in the forward and reverse directions, the transmission 500 to which the HMT unit 1 is mounted needs to include a forward / reverse switching mechanism. There is no.

  As shown in FIG. 2 and the like, the transmission 500 includes a transmission case 510 and a sub-transmission mechanism 530 and a differential transmission mechanism 550 housed in the transmission case 510.

The auxiliary transmission mechanism 530 performs multi-stage transmission of the rotational power from the output shaft 350 of the HMT unit 1.
In the present embodiment, as shown in FIG. 3, the transmission case 510 is provided with an input coupling 530a, and the output shaft 350 of the HMT unit 1 is connected to the auxiliary coupling 530a via the input coupling 530a. It is connected to the drive shaft of the speed change mechanism.
The differential transmission mechanism 550 differentially transmits the rotational power from the auxiliary transmission mechanism 530 to a pair of left and right drive axles 580a and 580b.

  Further, the transmission 500 is selectively and individually selected for each of the parking brake mechanism 560 that can selectively apply a braking force to the driven shaft of the auxiliary transmission mechanism 530 and the pair of left and right drive axles 580a and 580b. It has a pair of left and right traveling brake mechanisms 570a and 570b to which a braking force can be applied.

  As shown in FIGS. 2 and 3, in the present embodiment, the housing 200 includes a hollow peripheral wall 220 and a peripheral wall in which one side and the other side in the first direction are first and second openings 221 and 222, respectively. The housing main body 210 having a partition wall 225 that partitions the inner space of the peripheral wall 220 into a first chamber 200 (1) and a second chamber 200 (2) at a middle position in the first direction of 220 and the first opening 221 are closed. The first lid member 230 is detachably connected to the housing body 210 and the second lid member 250 is detachably connected to the housing body 210 so as to close the second opening 222. ing.

  The housing 200 houses the hydraulic pump 25, the hydraulic motor 35 and the volume changing member 40 in the first chamber 200 (1), and houses the planetary gear mechanism 100 in the second chamber 200 (2). ing.

  In this case, the first lid member 230 is formed with a pair of hydraulic oil passages (not shown) that fluidly connect the hydraulic pump 25 and the hydraulic motor 35.

  In the present embodiment, as shown in FIGS. 2 and 3, the pump shaft 20 and the motor shaft 30 extend along the first direction and the other side in the first direction enters the second chamber 200 (2). In the state, it is supported by the first lid member 230 and the partition wall 225.

  The input shaft 310 is disposed coaxially with the pump shaft 20 on the other side in the first direction from the pump shaft 20 and is not rotatable relative to the pump shaft 20 around the axis, and the other side in the first direction is The second cover member 250 extends outward and functions as an input unit that is operatively connected to the drive source.

  In the present embodiment, as shown in FIG. 3, the input shaft 310 is a separate shaft from the pump shaft 20, and is detachably connected to the pump shaft 20 via a cylindrical connecting shaft 315. Has been.

  Specifically, the cylindrical connecting shaft 315 has a spline on the inner peripheral surface, and the opposing ends of the pump shaft 20 and the input shaft 310 are splined to mesh with the spline of the cylindrical connecting shaft 315 on the outer peripheral surface. have.

Alternatively, the input shaft 310 and the pump shaft 20 can be formed by a single shaft.
In this case, the single shaft supports the hydraulic pump 25 in a portion located in the first chamber 200 (1) and penetrates through the second chamber 200 (2) to the second lid member. It extends outward from 250.

  1 to 3, the HMT unit 1 is mounted on one side in the vehicle width direction of the mission case 510, and rotational power from a drive source (not shown) is applied to the vehicle of the mission case 510. It is transmitted to the other side in the width direction.

Therefore, the power transmission from the drive source to the input shaft 310 is the input transmission shaft 320 arranged coaxially with the input shaft 310, one end side of which is connected to the input shaft 310 for relative rotation around the axis and The other end side is performed via an input transmission shaft 320 extending to the other side in the vehicle width direction of the mission case 510.
The input transmission shaft 320 is inserted into and supported by a shaft case 515 connected to the mission case 510 so as to be rotatable about its axis, and one end side supports an input pulley outside the shaft case 515, and The other end is connected to the input shaft 310 through an output coupling 320a.

  The constant speed transmission unit 330 has an input transmission gear 335 for operating and transmitting rotational power from the input shaft 310 to the constant speed input element.

  In the present embodiment, the internal gear 130 acts as the constant speed input element, and the sun gear 110 acts as a speed change input element by being supported on the motor shaft 30 so as not to be relatively rotatable. Acts as an output element that outputs the combined rotational power.

In this case, the input transmission gear 335 transmits a constant speed rotational power from the input shaft 310 to the internal gear 130.
In the present embodiment, as shown in FIG. 3 and the like, the input transmission gear 335 is a first input transmission gear 335a supported in the second chamber 200 (2) so as not to rotate relative to the input shaft 310. And a second input transmission gear 335b supported by the intermediate shaft 336 so as to mesh with the first input transmission gear 335a and the internal gear 130.

  The output shaft 350 is configured so that the other side in the first direction extends outward from the second lid member 250 and acts as an output portion in a state of being operatively connected to the output element.

  In the present embodiment, as shown in FIG. 3 and the like, the output shaft 350 is operatively connected to the carrier 150 acting as an output element via an output side transmission portion 370, and the planetary gear mechanism 100 is connected. Displaced in the radial direction from the axial position.

  The output-side transmission unit 370 is coaxially connected to the carrier 150 and is connected to the carrier 150 so as not to rotate relative to the carrier 150 so as to be relatively non-rotatable. The output-side transmission unit 370 is supported by the output-side transmission shaft 371 so as not to be relatively rotatable. The first output gear 373 and the output side supported by the portion of the output shaft 350 positioned in the second chamber 200 (2) so as not to rotate relative to the first output gear 373. And a second transmission gear 375.

  In the present embodiment, the output side second transmission gear 375 has a smaller diameter than the output side first transmission gear 373 so that rotational power is transmitted from the output element to the output shaft 350 at an increased speed. Yes.

The output transmission shaft 371 is detachably connected to the carrier 150 via a spline connection.
Specifically, as shown in FIG. 5, the second carrier body 170 (2) extends in the radial direction with respect to the axis of the planetary gear mechanism 100, and the second end 162 (2) of the carrier pin 160. A second radially extending portion 180 (2) that supports the second cylindrical portion 185 (2) that extends in the axial direction from the radially inner end of the second radially extending portion 180 (2); have.

  A spline is formed on the inner peripheral surface of the cylindrical portion 185 (2), and a spline that meshes with the spline is formed on the outer peripheral surface of the connecting end portion of the output side transmission shaft 371.

  In the present embodiment, as shown in FIGS. 3 to 5, the housing body 210 is provided with a support wall 255 so as to be located on the joint surface of the housing body 210 with the second lid member 250. The cylindrical portion 185 (2) of the second carrier body 170 (2) is supported on the support wall 255 via a bearing member 256.

  One end side of the output side transmission shaft 371 is inserted into the cylindrical portion 185 (2) of the second carrier body 170 (2), and the other end side is supported by the second lid member 250.

As shown in FIG. 3 and the like, a bearing member 261 and a seal member 262 are disposed in the support hole for supporting the input shaft 310 in the second lid member 250, and a seal is provided in the support hole for supporting the output shaft 350. A bearing member 265 with a function is disposed, and thereby the second chamber 200 (2) is liquid-tightly partitioned from the outside.
Reference numeral 205 in FIG. 4 denotes an oil level of the oil stored in the second chamber 200 (2).

  As shown in FIG. 3 and the like, the HMT unit 1 further includes a charge pump unit 80 for supplying hydraulic oil to the HST 10.

Specifically, one end side in the axial direction of the pump shaft 20 extends outward from the first lid member 230.
The charge pump unit 80 includes a charge pump main body 81 supported by an outwardly extending portion of the pump shaft 20 and a charge pump case attached to the first lid member 230 so as to surround the charge pump main body 81. 83.

Embodiment 2
Hereinafter, another embodiment of the planetary gear mechanism according to the present invention will be described with reference to the accompanying drawings.
9 and 10 are a sectional view and an exploded sectional view of the planetary gear mechanism 100B according to the present embodiment, respectively.
In the figure, the same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

  The planetary gear mechanism 100B according to the present embodiment is different from the planetary gear mechanism 100 according to the first embodiment in the first carrier body 170 (1), the second carrier body 170 (2), and the carrier. Instead of the carrier 150 including the pin 160, a carrier 150B including a first carrier body 170B (1), a second carrier body 170B (2) and a carrier pin 160B is provided.

  As shown in FIGS. 9 and 10, the carrier pin 160B has a large diameter portion 155 at the center in the axial direction, and a first extending portion 156 (1) from the large diameter portion 155 to the one side in the axial direction. A first small-diameter portion 157 (1) and a second small-diameter portion 157 (2) extending from the large-diameter portion 155 to the other side in the axial direction along with the second step portion 156 (2).

  The first and second small diameter portions 157 (1) and 157 (2) of the carrier pin 160B are inserted into the first and second carrier bodies 170B (1) and 170B (2), respectively. The second support holes 172B (1) and 172B (2) are provided.

  The first support hole 172B (1) has an opening width into which the first small diameter portion 157 (1) can be engaged and has a smaller diameter than the large diameter portion 155, and the second carrier body 170B (2 The inner end side in the axial direction adjacent to the second carrier body is open on the surface 170a (1) facing the second carrier body.

  Similarly, the second support hole 172B (2) has an opening width into which the second small diameter portion 157 (2) can be engaged and has a smaller diameter than the large diameter portion 155, and the first carrier body. The inner end in the axial direction close to 170B (1) is open to the surface 170a (2) facing the first carrier body 170B (1).

  As shown in FIGS. 9 and 10, in the present embodiment, the carrier pin 160B has the first small diameter portion 157 (1) engaged with the first support hole 172B (1) and the carrier pin 160B. When the first step portion 156 (1) is engaged with the facing surface 170a (1), the one end side is supported by the first carrier body 170B (1) while being prevented from moving to one side in the axial direction, The second small diameter portion 157 (2) is engaged with the second support hole 172B (2), and the second step portion 156 (2) is engaged with the facing surface 170a (2). The other end side is supported by the second carrier body 170B (2) in a state of preventing movement to the other side in the axial direction.

  That is, in the present embodiment, the first small diameter portion 157 (1) forms the first end portion 162B (1) of the carrier pin 160B supported by the first support hole 172B (1), and The first step portion 156 (1) and the facing surface 170a (1) act as the first contact surface 165 (1) and the first stop surface 175 (1), respectively.

  The second small diameter portion 157 (2) forms the second end portion 162B (2) of the carrier pin 160B supported by the second support hole 172B (2), and the second step portion 156. (2) and the facing surface 170a (2) act as the second contact surface 165 (2) and the second stop surface 175 (2), respectively.

  The carrier pin 160B functions as the intermediate portion 163 in which the large diameter portion 155 supports the planetary gear 120.

  In the present embodiment, as shown in FIGS. 9 and 10, the first support hole 172B (1) has an axially outer end on the back surface of the first carrier body 170B (1) (the second carrier body 170B). The surface of the second support hole 172B (2) is open on the opposite side of the second carrier body 170B (2) (the first carrier body 170B (1)). Is open on the opposite side of the surface.

  With such a configuration, the oil stored in the portion of the housing 200 that accommodates the planetary gear mechanism 100 is effectively stored in the axial hole 166a of the lubricating oil hole 166 formed in the carrier pin 160B. Can lead.

  In the planetary gear mechanism 10B according to the present embodiment, since the carrier pin 160B has the first and second small diameter portions 157 (1) and 157 (2), the carrier pin 160B Compared with the carrier pin 160 in the planetary gear mechanism 100 according to the first aspect, the strength is slightly reduced, but the both ends are supported by the first and second carrier bodies 170B (1) and 170B (2). Therefore, as compared with the conventional configuration in which the carrier pin is cantilevered, the load applied to the carrier pin 160B can be effectively reduced.

Also in the present embodiment, the first contact surface 165 (1) (in the present embodiment, the first step portion 156 (1)) is connected to the first stop surface 175 (1) (this embodiment). In the embodiment, the carrier pin 160B is prevented from coming off to one side in the axial direction by abutting against the facing surface 170a (1)), and the second abutting surface 165 (2) (in the present embodiment). The second step portion 156 (2)) contacts the second stop surface 175 (2) (in the present embodiment, the opposing surface 170a (2)), so that the other side in the axial direction of the carrier pin 160B. It is prevented from falling out.
Accordingly, the carrier pin 160B can be prevented from coming off without applying an excessive load to the specific member such as the retaining pin.

Embodiment 3 FIG.
Hereinafter, still another embodiment of the planetary gear mechanism according to the present invention will be described with reference to the accompanying drawings.
11 to 13 are a cross-sectional view, an exploded cross-sectional view, and an exploded perspective view of the planetary gear mechanism 100C according to the present embodiment, respectively.
In the figure, the same members as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

  The planetary gear mechanism 100C according to the present embodiment has a carrier 150C instead of the carrier 150, as compared with the planetary gear mechanism 100 according to the first embodiment.

  As shown in FIGS. 11 to 13, the carrier 150 </ b> C supports the carrier pin 160 and first and second ends 162 (1) and 162 (2) of the carrier pin 160, and the planetary gear 120. A carrier body 600 that rotates about the axis of the sun gear 110 together with the revolution around the sun gear 110, and a carrier cover 700 that is detachably connected to the carrier body 600.

  As shown in FIGS. 11 to 13, the carrier body 600 is positioned on one axial side of the planetary gear 120 and supports a first end 162 (1) of the carrier pin 160. A first end wall 610 provided with (1), a central opening 640 provided radially inward of the first end wall 610 and allowing the sun gear 110 to be inserted in the axial direction; and the planetary gear. A second end wall 620 located on the other side in the axial direction from 120 and a connecting portion 630 for connecting the first and second end walls 610 and 620 are provided.

  The second end wall 620 includes a second support hole 642 (2) that supports the second end 162 (2) of the carrier pin 160, and a second contact surface 165 (2) (the book) of the carrier pin 160. In the embodiment, the main body side stop surface 645 that engages with the end surface 164 (2) of the second end portion 162 (2) and the end surface on the other side in the axial direction of the sun gear 110 are directly or indirectly engaged. A main body side holding surface 647.

  As shown in FIGS. 11 and 12, the first support hole 642 (1) has an inner diameter that is as close as possible to the outer diameter of the carrier pin 160 as long as the carrier pin 160 can be inserted. And penetrates the first end wall 610 in the axial direction.

  On the other hand, the second support hole 642 (2) has a hole 643 and a bottom surface 644 extending in the axial direction, as shown in FIG.

The hole 643 is as close as possible to the outer diameter of the second end 162 (2) of the carrier pin 160 within a range that allows the insertion of the second end 162 (2) of the carrier pin 160. The first end wall 610 has an inner diameter that is close to the first end wall 610 and opens in a surface facing the first end wall 610 in the second end wall 620. The other side in the axial direction of the opposite side ends within the axial thickness of the second end wall 620.
The bottom surface 644 extends radially inward from the other axial side of the hole 643.

  In the present embodiment, the bottom surface 644 of the second support hole 642 (2) is the end surface 164 of the second end portion 162 (2) of the carrier pin 160 that acts as the second contact surface 165 (2). It acts as the main body side stop surface 645 engaged with (2).

  In the carrier body 600 having such a configuration, as shown in FIG. 12, the second end 162 (2) of the carrier pin 160 is inserted from the one side in the axial direction through the first support hole 642 (1). By inserting the second support hole 642 (2) into the second end surface of the carrier pin 160 in a state where the second contact surface 165 (2) of the carrier pin 160 is engaged with the main body side stop surface 645. The portion 162 (2) may be supported by the second support hole 642 (2), and the first end 162 (1) of the carrier pin 160 may be supported by the first support hole 642 (1).

  In the present embodiment, the carrier body 600 further includes a cylindrical portion 650 extending in the axial direction from the radially inner end portion of the second end wall 620.

  Also in the present embodiment, as in each of the above embodiments, the carrier 150C acts as a combined rotational power output member, and the combined rotational power is output from the tube portion 650.

Specifically, the cylindrical portion 650 is provided with a spline on the inner peripheral surface, and an output shaft (not shown) is connected so as not to be relatively rotatable and detachable.
Moreover, as shown in FIG. 11, the said cylinder part 650 is supported by the support wall 255 of a housing via the bearing member 256 (2) arrange | positioned at an outer peripheral surface.

  The carrier cover 700 is detachably connected to the carrier body 600 through a fastening member 178 in a state where the carrier cover 700 is in contact with the first end wall 610 of the carrier body 600.

  As shown in FIGS. 11 and 12, the carrier cover 700 includes a wall portion 710 that is detachably connected to one axial direction side of the first end wall 610 of the carrier body 600, and a radial direction of the wall portion 710. It has a cylinder portion 750 that extends in the axial direction from the inner end portion and through which a rotating shaft (the motor shaft 30 in the present embodiment) connected to the sun gear 110 is inserted.

  The wall portion 710 is a first contact surface 165 (1) of the carrier pin 160 supported by the first support hole 642 (1) (in this embodiment, the end surface of the first end portion 162 (1)). 164 (1)) is engaged directly with the end surface on one side in the axial direction of the sun gear 110 and indirectly with the main body side holding surface 647. A cover-side holding surface 717 for holding the sun gear 110 so as to be relatively rotatable about an axis.

The planetary gear mechanism 100C having such a configuration has the same effects as in the first embodiment.
That is, in the present embodiment, the carrier pin 160 has the first and second end portions 162 (1) and 162 (2) that are connected to the first support hole 642 (1) of the first end wall 610 and the first end portion 610, respectively. In the doubly supported state inserted in the second support hole 642 (2) of the second end wall 620, the planetary unit 163 is in the middle portion 163 between the first and second end portions 162 (1) and 162 (2). The gear 120 is supported.
Therefore, the load applied to the carrier pin 160 can be effectively reduced.

In the present embodiment, the first contact surface 165 (1) contacts the cover-side stop surface 715, so that the carrier pin 160 is prevented from coming off to one side in the axial direction, and the The second contact surface 165 (2) contacts the main body side stop surface 645, thereby preventing the carrier pin 160 from coming off to the other side in the axial direction.
Therefore, the carrier pin 160 can be prevented from coming off without imposing an excessive load on a specific member such as the retaining pin.

  Hereinafter, the lubricating oil supply structure provided in the planetary gear mechanism 100C according to the present embodiment will be described.

  As shown in FIGS. 11 and 12, in the present embodiment, the second end wall 620 of the carrier body 600 is connected to the carrier pin 160 so that one end thereof faces the opening of the axial hole 166a. An oil hole 646 that opens to the opposite surface and opens to the back surface at the other end side is formed.

  Further, the wall 710 of the carrier cover 700 is provided with an oil hole 716 that opens to the surface facing the carrier pin 160 and has the other end opened to the back so that one end faces the opening of the axial hole 166a. ing.

  By providing the oil holes 646 and 716, the oil stored in the accommodation space of the planetary gear mechanism 100C is effectively applied to the first and second ends 162 (1) and 162 (2) of the carrier pin 160. Can lead to.

Note that it is possible to delete one of the oil hole 646 of the second end wall 620 and the oil hole 716 of the wall portion 710.
In this case, the axial hole 166a of the lubricating oil hole 166 is opened at least on the end surface facing the oil hole.

  Also in the planetary gear mechanism 100C according to the present embodiment, the carrier pin 160 is held so as not to rotate about its axis in a state where the radial hole 166b is along the radial direction with the rotation center of the sun gear 110 as a reference. ing.

  In detail, a holding groove 615 into which a detent pin 168 attached to the carrier pin 160 is engaged is formed on a surface of the first end wall 610 facing the carrier cover 700. Is connected to the carrier body 600, so that the holding groove 615 is closed by the carrier cover 700 in a state where the detent pin 168 is engaged with the holding groove 615.

The connecting portion 630 may take various forms as long as the first and second end walls 610 and 620 are connected.
In the present embodiment, as shown in FIG. 13, the connecting portion 630 has a plurality of connecting pieces 631 arranged in the circumferential direction.

Each of the plurality of connecting pieces 631 connects the first and second end walls 610 and 620 between the planetary gears 120 adjacent in the circumferential direction.
In the present embodiment, the connecting piece 631 connects the radially outer ends of the first end wall 610 and the second end wall 620 with respect to the radial position.

  In this embodiment, as shown in FIGS. 12 and 13, the carrier body 600 has an access opening 635 through which the planetary gear 120 can be inserted in the radial direction between the connecting pieces 631 adjacent in the circumferential direction. So that the teeth 122 of the planetary gear 120 extend radially outward from the access opening 635 when the planetary gear 120 is engaged with the sun gear 110 via the access opening 635. It is configured.

  According to such a configuration, it is possible to facilitate the assembling work between the planetary gear 120 and the sun gear 110 and the assembling work between the planetary gear 120 and the internal gear 130.

  The planetary gear mechanism 100C according to the present embodiment includes the carrier pin 160 having the same configuration as that of the planetary gear mechanism 100 according to the first embodiment, but instead of this, the second end portion 162 is provided. (2) may be modified to have a carrier pin 160C having a small diameter.

FIG. 14 is a partial cross-sectional view of the planetary gear mechanism 100C ′ modified to use the carrier pin 160C.
In the figure, the same members as those in the above embodiment are denoted by the same reference numerals.

As shown in FIG. 14, the carrier pin 160 </ b> C has a second end portion 162 (2) having a smaller diameter than the intermediate portion 163 that supports the planetary gear 120, and the intermediate portion 163 is accompanied by a step portion 156. It extends to the other side in the axial direction.
In the modification shown in FIG. 14, the first end portion 162 (1) has the same outer diameter as the intermediate portion 163.

In the modified example 100C ′, the second support hole 642C (2) formed in the second end wall 620 has a smaller diameter than the intermediate portion 163 in which the second end portion 162 (2) can be engaged. The inner end side in the axial direction close to the first end wall 610 has an opening width that is open to a surface 620a of the second end wall 620 facing the first end wall 610.
In the modification shown in FIG. 14, the oil hole 646 has the same inner diameter as the second support hole 642C (2).

  In this modification 100C ', the step 156 of the carrier pin 160C acts as the second contact surface 165 (2), and the facing surface 620a acts as the second stop surface 175 (2).

  That is, the step 156 is engaged with the facing surface 620a in a state where the second end 162 (2) is engaged with the second support hole 642C (2). The movement of 160C to the other side in the axial direction is prevented.

100, 100B, 100C, 100C ′ Planetary gear mechanism 110 Sun gear 120 Planetary gear 130 Internal gear 150, 150C Carrier 155 Large diameter portion 156 (1) First step portion 156 (2) Second step portion 157 (1) First Small diameter portion 157 (2) Second small diameter portion 160, 160B, 160C Carrier pins 162 (1), 162B (1) First end portion 162 (2), 162B (2) Second end portion 165 (1) First contact Contact surface 165 (2) Second contact surface 166 Lubricating oil hole 166a Axial direction hole 166b Radial direction holes 170 (1), 170B (1) First carrier body 170a (1) Opposing surface 170 (2) 2), 170B (2) Second carrier body 170a (2) Opposing surface 172 (1), 172B (1), 642 (1) first carrier hole 172 (2) , 172B (2), 642 (2) Second support hole 173 (1), 173 (2), 643 Hole 175 (1) First stop surface 175 (2) Second stop surface 176 (1) First oil Hole 176 (2) Second oil hole 180 (1) First radially extending portion 180 (2) Second radially extending portion 182 (1) First sandwiching surface 182 (2) Second sandwiching surface 185 (1) 1st cylinder part 185 (2) 2nd cylinder part 600 Carrier main body 610 1st wall part 620 2nd end wall 630 Connection part 631 Connection piece 635 Access opening 640 Center opening 644 Bottom face 645 Main body side stop surface 646 Oil hole 647 Main body side holding surface 700 Carrier cover 710 Wall portion 715 Cover side stop surface 716 Oil hole 717 Cover side holding surface 750 Tube portion

Claims (15)

A sun gear, a planetary gear meshing with the sun gear, an internal gear meshing with the planetary gear, the planetary gear rotatably supporting an axis, and in conjunction with the revolution of the planetary gear around the sun gear. A planetary gear mechanism having a carrier that rotates about the axis of
The carrier includes a carrier pin that supports the planetary gear so as to be rotatable about an axis, and a first end on one axial direction of the carrier pin so as to rotate around the axis of the sun gear together with the revolution of the planetary gear around the sun gear. And first and second carrier bodies that respectively support the second end portion on the other side in the axial direction,
The first carrier body is provided with a first support hole and a first stop surface, the second carrier body is provided with a second support hole and a second stop surface,
In the first and second carrier bodies, a first contact surface in which a first end portion of the carrier pin is engaged with the first support hole and faces one side in the axial direction of the carrier pin is the first stop surface. The second end of the carrier pin is engaged with the second support hole, and the second contact surface facing the other side in the axial direction of the carrier pin is engaged with the second stop surface. A planetary gear mechanism characterized by being connected to each other in a separable manner. The first support hole has an axially inner end side close to the second carrier body that opens to a surface facing the second carrier body, and an axially outer end side opposite to the second carrier body has the first support hole. A hole that terminates within the thickness of one carrier body in the axial direction; and a bottom surface that extends radially inward from the axially outer end of the hole;
The second support hole has an axially inner end close to the first carrier body that opens to a surface facing the first carrier body, and an axially outer end opposite to the first carrier body has the first outer end side. 2 a hole that terminates within the thickness of the carrier body in the axial direction; and a bottom surface that extends radially inward from the axially outer end of the hole;
End surfaces on one side and the other side in the axial direction of the carrier pin act as the first and second contact surfaces, respectively.
The planetary gear mechanism according to claim 1, wherein the bottom surfaces of the first and second support holes act as the first and second stop surfaces, respectively. Oil holes are provided in at least one of the first and second carrier bodies,
The said oil hole is extended in the axial direction outer end side from the radial direction inner end of the bottom face of the said corresponding support hole, and is opened in the back surface of the said corresponding carrier main body. Planetary gear mechanism.   4. The carrier pin according to claim 3, wherein the carrier pin has a lubricating oil hole that opens to an end face in an axial direction so as to face the oil hole and opens to a region of the outer peripheral surface that supports the planetary gear. The planetary gear mechanism described. The lubricating oil hole includes an axial hole that opens to an axial end surface, and a radial hole that opens to the outer peripheral surface at one end and the other end in a state of communicating with the axial hole.
The carrier pin is fixed to at least one of the first and second carrier bodies so that the radial hole cannot rotate about its axis in a state along the radial direction with respect to the rotation center of the sun gear. The planetary gear mechanism according to claim 4, wherein the planetary gear mechanism is provided. The carrier pin has a large-diameter portion at the center in the axial direction, a first small-diameter portion extending from the large-diameter portion to the one side in the axial direction along with the first step portion, and a second-step portion from the large-diameter portion. A second small diameter portion extending in the other axial direction,
The first support hole has an opening width in which the first small-diameter portion can be engaged and is smaller in diameter than the large-diameter portion, and an inner end side in the axial direction adjacent to the second carrier body is the second carrier. Open on the surface facing the body,
The second support hole has an opening width in which the second small-diameter portion can be engaged and has a smaller diameter than the large-diameter portion, and an axially inner end side close to the first carrier body is the first carrier. Open on the surface facing the body,
The first step portion acts as the first contact surface and the surface of the first carrier body facing the second carrier body acts as the first stop surface, while the second step portion acts as the first stop surface. 2. The planetary gear mechanism according to claim 1, wherein the planetary gear mechanism acts as a second abutment surface, and a surface of the second carrier body facing the first carrier body acts as the second stop surface.   The first support hole has an axially outer end opened on the back surface of the first carrier body, and the second support hole has an axially outer end opened on the back surface of the second carrier body. The planetary gear mechanism according to claim 6. The first carrier body is a first radially extending portion that extends in the radial direction with respect to the axis of the planetary gear mechanism, and has a central hole along the axial direction at the radial center and the first carrier body. A first radially extending portion provided with a support hole and the first stop surface; and a hollow first tube portion extending in the axial direction from a radially inner end of the first radially extending portion. ,
The second carrier body is a second radially extending portion extending in a radial direction with reference to the axis of the planetary gear mechanism, and has a second diameter provided with the second support hole and the second stop surface. 8. The apparatus according to claim 1, further comprising: a direction extending portion, and a hollow second cylindrical portion extending in an axial direction from a radial center portion of the second radial extending portion. The planetary gear mechanism described. The first and second carrier main bodies are directly or indirectly engaged with the end surfaces on one side and the other side in the axial direction of the sun gear in a state where the first and second carrier main bodies are connected, respectively. And a second clamping surface is provided,
9. The planetary gear mechanism according to claim 1, wherein the sun gear is held in the axial direction while being relatively rotatable about the axis by the first and second holding surfaces. A sun gear, a planetary gear meshing with the sun gear, an internal gear meshing with the planetary gear, the planetary gear rotatably supporting an axis, and in conjunction with the revolution of the planetary gear around the sun gear. A planetary gear mechanism having a carrier that rotates about the axis of
The carrier includes a carrier pin that supports the planetary gear so as to be rotatable about an axis, a carrier body that supports the carrier pin so as to rotate around the axis of the sun gear together with the revolution of the planetary gear around the sun gear, and the carrier A carrier cover removably coupled to the body,
The carrier pin includes first and second ends located on one side and the other side in the axial direction, an intermediate portion supporting the planetary gear between the first and second ends, and one side in the axial direction. And first and second contact surfaces facing the other side,
The carrier body is positioned on one axial side of the planetary gear, has a first end wall provided with a first support hole for supporting the first end of the carrier pin, and a radial direction of the first end wall A central opening that is provided inward and allows the sun gear to be inserted in the axial direction, a second end wall that is located on the other axial side of the planetary gear, and the first and second end walls are connected to each other. A connecting portion,
The second end wall includes a second support hole that supports the second end of the carrier pin, a main body-side stop surface that engages with the second contact surface of the carrier pin, and the other axial side of the sun gear. A body-side clamping surface that directly or indirectly engages the end surface of
The carrier cover is detachably connected to one axial side of the first end wall of the carrier body, and extends in the axial direction from a radially inner end of the wall, and is connected to the sun gear. A cylindrical portion through which the rotating shaft is inserted,
The wall portion is directly or indirectly engaged with a cover-side stop surface that engages with the first contact surface of the carrier pin supported by the first support hole, and an end surface on one side in the axial direction of the sun gear. A planetary gear mechanism having a cover-side holding surface that holds the sun gear so as to be relatively rotatable about an axis while cooperating with the body-side holding surface. The second support hole has an axially inner end side close to the first end wall that opens to a surface facing the first end wall and an axially outer end side opposite to the first end wall is the first end wall. A hole that terminates within the axial thickness of the two end walls, and a bottom surface extending radially inward from the axially outer end of the hole;
The end surface on the other side in the axial direction of the carrier pin acts as the second contact surface, and the bottom surface of the second support hole acts as the main body side stop surface. Planetary gear mechanism. The carrier pin has the second end portion having a smaller diameter than the intermediate portion, and extends from the intermediate portion to the other side in the axial direction along with a stepped portion.
The second support hole has an opening width in which the second end portion can be engaged and has a smaller diameter than the intermediate portion, and the inner end side in the axial direction adjacent to the first end wall is the second end wall. In the surface facing the first end wall in
The said step part acts as the said 2nd contact surface, and the opposing surface with the said 1st end wall in the said 2nd end wall acts as the said main body side stop surface. Planetary gear mechanism. The carrier pin has an axial hole that opens in at least one of the first end surface on the one axial side and the second end surface on the other axial side, and one end and the other end that are in communication with the axial hole. A lubricating oil hole including a radial hole opening in the outer peripheral surface of the part is provided,
At least one of the second end wall of the carrier body and the wall portion of the carrier cover has an oil that opens on the surface facing the carrier pin so that one end faces the opening of the axial hole and the other end opens on the back surface. The planetary gear mechanism according to any one of claims 10 to 12, wherein a hole is provided.   The carrier pin is fixed around at least one of the carrier body and the carrier cover with respect to the axis so that the radial hole cannot rotate about the axis when the radial hole is along the radial direction with respect to the rotation center of the sun gear. The planetary gear mechanism according to claim 13, wherein the planetary gear mechanism is provided. The connecting portion includes a plurality of connecting pieces arranged in a circumferential direction, each connecting a plurality of connecting pieces connecting the first and second end walls between the planet gears adjacent in the circumferential direction. ,
The carrier body has an access opening through which the planetary gear can be inserted between the connecting pieces adjacent in the circumferential direction, and the planetary gear is engaged with the sun gear through the access opening. The planetary gear mechanism according to any one of claims 10 to 14, wherein a tooth portion of the planetary gear is configured to extend radially outward from the access opening.

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