JP6795405B2 - Dampering - Google Patents

Description

The present invention relates to damping used in, for example, a transfer device for a four-wheel drive vehicle.

The transfer device of a four-wheel drive vehicle is a planetary gear type auxiliary transmission that can select between Hi (high-speed output mode) and Lo (low-speed output mode) by inputting the rotational driving force from the main transmission. Has. FIG. 8 shows an example of this type of auxiliary transmission, that is, the transfer case 101 and the spline 102a on the inner circumference are spline-fitted with the output shaft of the main transmission (not shown) and rotationally driven from the main transmission. The input shaft 102 for inputting force, the sun gear 103 integrally provided on the outer periphery of the rear end of the input shaft 102, a plurality of planetary gears 104 arranged around the sun gear 103, and the planetary gear 104 are supported at predetermined angular intervals. The carrier 105 and the ring gear 106 supported by the transfer case 101 are provided. Each planetary gear 104 is meshed with the outer peripheral teeth of the sun gear 103 and with the inner peripheral teeth of the ring gear 106.

The carrier 105 is rotatably supported by the transfer case 101 via a ball bearing 107, and the input shaft 102 is rotatably supported by the inner circumference of the carrier 105 via a needle bearing 108. The gap between the shaft hole of the transfer case 101 and the input shaft 102 inserted through the shaft hole 101 is sealed by an oil seal 109.

Further, a rear output shaft 110 is coaxially and rotatably arranged behind the input shaft 102, and a spline 110a formed on the outer periphery of the rear output shaft 110 can be moved in the axial direction by a switching arm 112. The switching sleeve 111 is spline-fitted, and the spline 111a formed on the outer periphery of the switching sleeve 111 is the spline 103a formed on the inner peripheral portion of the sun gear 103 or the spline 105a formed on the inner peripheral portion of the carrier 105. Can be selectively fitted to.

Then, as shown in the drawing, when the spline 111a of the switching sleeve 111 is fitted with the spline 103a of the sun gear 103, the rotational driving force input to the input shaft 102 is transferred from the sun gear 103 to the rear output shaft 110 via the switching sleeve 111. Since it is transmitted, the rear output shaft 110 rotates at a constant speed with the input shaft 102 (high-speed output mode), and the switching sleeve 111 moves rearward on the spline 110a of the rear output shaft 110 to move the spline of the carrier 105. In the state of being fitted with the 105a, the rotational driving force input to the input shaft 102 is transmitted from the sun gear 103 to the rear output shaft 110 while being decelerated via the planetary gear 104, the carrier 105, and the switching sleeve 111. Slow output mode).

Here, in the auxiliary transmission as described above, the ring gear 106 meshed with the planetary gear 104 is spline-fitted to the transfer case 101, that is, the spline 106a formed on the outer peripheral surface of the ring gear 106 is the transfer case. It is fitted with a spline 101a formed on the inner peripheral surface of the ring gear support portion of 101, and is fixed by a snap ring 113 to prevent it from coming off. Then, in order to prevent radial rattling due to the clearance between the ring gear 106 and the transfer case 101, the front outer peripheral surface 106b in which the spline 106a of the ring gear 106 is not formed and the inside of the ring gear support portion of the transfer case 101 A damper ring 200 is interposed between the inner peripheral surface 101b on the back side where the spline 101a is not formed on the peripheral surface.

That is, when assembling the ring gear 106, first, the damper ring 200 is inserted into the inner peripheral surface 101b on the back side of the ring gear support portion of the transfer case 101, oil is applied to the periphery thereof, and then the ring gear 106 is splined on the outer circumference thereof. While fitting the 106a with the spline 101a of the transfer case 101, the front end surface is inserted until it comes into contact with the stepped surface on the back side of the ring gear support portion of the transfer case 101, and the snap ring 113 prevents the 106a from coming off. At this time, in the process of inserting the ring gear 106, the front outer peripheral surface 106b of the ring gear 106 is press-fitted into the damper ring 200, and the outer peripheral surface of the damper ring 200 is the inner peripheral surface on the inner peripheral surface of the ring gear support portion of the transfer case 101. Since the damper ring 200 is pressure-welded to the 101b, that is, the damper ring 200 is compressed in the radial direction with an appropriate crushing allowance, the ring gear 106 is elastically float-supported to the transfer case 101 via the damper ring 200, thereby causing the transfer. It is possible to prevent the generation of impact and abnormal noise due to the contact between the case 101 and the ring gear 106.

Here, when the damper ring 200 is made of, for example, a single rubber elastic body, it is inserted into the inner peripheral surface 101b on the inner side of the ring gear support portion of the transfer case 101, and then oil is applied to insert the ring gear 106. The purpose of this is to prevent the transfer case 101 from falling off from the upper inner peripheral surface of the ring gear support portion of the transfer case 101 so as to fold downward without being able to withstand the deformation force due to its own weight. So, conventionally, as shown in FIG. 9, it is known that a core material for reinforcement is embedded inside.

That is, the damper ring 200 shown in FIG. 9 is made of a plurality of sausage-shaped damper bodies 201 made of rubber elastic bodies, and metal or plastic embedded in these damper bodies 201 and connecting the damper bodies 201 to each other in the circumferential direction. An annular core material 202 is provided. Then, as shown in FIG. 10, the damper ring 200 joins the connecting portions 202a and 202b formed at both ends of the core material 202 after the damper main body 201 is vulcanized and molded on the core material 202 extending linearly. By doing so, it is formed into a ring shape as shown in FIG.

Further, among the plurality of damper body 201, a pair of damper body ₂₀₁ 1, 201 ₂ at the predetermined position, the stopper portion 201a which protrudes respectively radially outwardly is formed. A notch 101c extending in the axial direction is formed at one position in the circumferential direction of the ring gear support portion of the transfer case 101 for the purpose of adjusting the mounting position of the damper ring 200 and facilitating mounting of the snap ring 113. cage, the stepped surface 101d of both lateral sides of the cutout portion 101c, in 101d, by locking the damper body ₂₀₁ 1, 201 ₂ stopper 201a formed, thereby achieving a detent of the damper ring 200 ( For example, see the prior art document below).

JP-A-2002-257170 JP-A-2002-257171 JP-A-2002-257188

However, in the conventional damper ring 200, when the stopper portion 201a needs to be in a state of facing outward in the radial direction as shown in the illustrated example, or conversely, in a state of facing inward in the radial direction, the core material 202 coupling portions 202a at both ends, in the state where an annular by coupling 202b together, the structure of the core 202, since the twist direction of the direction (direction of arrow T in FIG. 9) is not restricted, the damper body 201 ₁ is not restricted also the orientation of the stopper portion 201a of the 201 _2, Therefore, as in the example shown, to maintain the stopper portion 201a, the state facing radially outward or state opposite to facing radially inward, Was difficult.

The present invention has been made in view of the above points, and a technical problem thereof is to provide a detent function for a stopper portion formed on a damper body in a dampering used in a transfer device or the like. The purpose is to make it possible to maintain a state in which the player faces a predetermined direction for playing.

The damping according to the first aspect of the present disclosure is interposed in an annular gap between the inner peripheral side member and the outer peripheral side member which are concentrically arranged with each other in a state of being arranged in the circumferential direction at an appropriate interval. A plurality of damper bodies made of rubber elastic bodies and a core material embedded in each damper body and connecting the damper bodies to each other are provided, and the damper body is formed on the inner peripheral side member or the outer peripheral side member. A stopper portion to be locked to the notch portion is formed, and the core material is made of a material having higher rigidity and appropriate elasticity than a rubber elastic body, and the core material projects to both sides in the axial direction. fins made of a rubber elastic material extending between the damper body provided with Rutotomoni, the core material is characterized in that a wire or a coil spring.

The damping according to the second aspect of the present disclosure is interposed in an annular gap between the inner peripheral side member and the outer peripheral side member which are concentrically arranged with each other in a state of being arranged in the circumferential direction at an appropriate interval. A plurality of damper bodies made of rubber elastic bodies and a core material embedded in each damper body and connecting the damper bodies to each other are provided, and the damper body is formed on the inner peripheral side member or the outer peripheral side member. A stopper portion to be locked to the notch portion is formed, and the core material is made of a material having higher rigidity and appropriate elasticity than a rubber elastic body, and the core material projects to both sides in the axial direction. It is characterized in that fins made of a rubber elastic body extending between the damper main bodies are provided together with the fins , and the fins are located between the damper main bodies in which the stopper portion is formed.

The damper ring according to the third aspect of the present disclosure is interposed in the annular gap between the inner peripheral side member and the outer peripheral side member which are concentrically arranged with each other in a state of being arranged in the circumferential direction at an appropriate interval. A plurality of damper bodies made of rubber elastic bodies and a core material embedded in each damper body and connecting the damper bodies to each other are provided, and the damper body is formed on the inner peripheral side member or the outer peripheral side member. A stopper portion to be locked to the notch portion is formed, and the core material is made of a material having higher rigidity and appropriate elasticity than a rubber elastic body, and the core material projects to both sides in the axial direction. Along with providing fins made of a rubber elastic body extending between the damper bodies, the core material is projected from a position between the fins on both sides in the axial direction in a direction orthogonal to the fins and rubber elasticity extending between the damper bodies. It is characterized by providing orthogonal fins made of a body.

According to the damper ring according to the present invention, since the twist of the core material is suppressed by the fins, inadvertent displacement of the stopper portion of the damper body in the twisting direction is restricted. Therefore, the stopper portion is placed on the inner peripheral side. By being locked to the notch formed in the member or the outer peripheral side member, it is possible to maintain the state facing a predetermined direction for performing the detent function.

It is an axial projection drawing which shows the 1st Embodiment of the damper ring which concerns on this invention. It is a figure which shows the state before connecting the core material in an annular shape in the 1st Embodiment of the damper ring which concerns on this invention. It is a partially enlarged view which shows the joint part at both ends of the core material in the 1st Embodiment of the damper ring which concerns on this invention. It is a main part perspective view which shows the 1st Embodiment of the damper ring which concerns on this invention. It is an axial projection drawing which shows the 2nd Embodiment of the damper ring which concerns on this invention. It is a figure which shows the state before connecting the core material in an annular shape in the 2nd Embodiment of the damper ring which concerns on this invention. It is a main part perspective view which shows the 2nd Embodiment of the damper ring which concerns on this invention. It is explanatory drawing which shows the relationship between an example of the auxiliary transmission in a transfer device, and the damper ring attached to this example. It is an axial projection drawing which shows an example of the conventional damper ring. It is a figure which shows the state before connecting the core material in an annular shape in the conventional damper ring.

Hereinafter, preferred embodiments of damping according to the present invention will be described with reference to the drawings. First, FIG. 1 shows the first embodiment.

That is, as shown in FIG. 1, the damper ring 10 of the first embodiment is composed of a plurality of damper main bodies 11 made of a rubber elastic body and a damper main body 11 made of, for example, a metal or synthetic resin having higher rigidity than the rubber elastic body. It is provided with a core material 12 which is embedded in a state of passing through the center and connects the damper main bodies 11 to each other in the circumferential direction. As shown in FIG. 2, the damper ring 10 joins the connecting portions 12a and 12b formed at both ends of the core material 12 after the damper main body 11 is vulcanized and molded on the core material 12 extending linearly. As a result, it is circular as shown in FIG.

The damper main body 11 is formed between the inner peripheral surface 101b on the inner peripheral surface of the ring gear support portion of the transfer case 101 shown in FIG. 8 and the outer peripheral surface 106b on the front side of the ring gear 106 fixed to the inner peripheral surface thereof. By being interposed in the compressed state, the ring gear 106 is elastically floated and supported on the inner circumference of the transfer case 101, thereby preventing the generation of impact and abnormal noise due to the contact between the transfer case 101 and the ring gear 106. It is formed in a sausage shape with both ends forming a spherical convex surface, and is arranged side by side at appropriate intervals from each other. The transfer case 101 corresponds to the outer peripheral side member described in each of the first to third aspects , and the ring gear 106 is attached to the inner peripheral side member described in each of the first to third aspects. It is equivalent.

As shown in FIGS. 3 and 4, the core material 12 is made of an elongated coil spring made of spring steel in this embodiment, and has a damper main body 11 and rubber elasticity extending continuously from the damper main body 11. It is embedded in a connecting portion 13 having a wire diameter substantially equal to the winding diameter of the core material 12 (coil spring) made of a body so as to alternately pass through the damper main body 11 and the connecting portion 13.

Further, as shown in FIG. 3, the connecting portions 12a and 12b formed at both ends of the core material 12 made of the coil spring are exposed from the rubber elastic body of the connecting portion 13, and one of the connecting portions 12a is exposed. The winding pitch of the coil spring is small and the diameter is large, and the other coupling portion 12b has a small winding pitch and a small diameter of the coil spring and can be screwed to the inner circumference of the coupling portion 12a. That is, the coupling portions 12a and 12b are twisted in the direction opposite to the winding direction of the coil spring as shown by arrows T1 and T2 in FIG. 3, and then the twisting force is applied in a state where they are abutted against each other as shown by arrow X. By releasing them, they can be screwed together to form a combined state.

Of the damper body 11, the coupling portion 12a of the core member 12, the damper body ₁₁ 1, 11 ₂ opposed to each other in the circumferential direction on both sides of 12b and 180 degrees symmetrical positions, extending linearly as shown in FIG. 2 in other words The damper bodies 11 ₁ and 11 ₂ facing each other in the vicinity of the middle in the longitudinal direction in the state are formed with stopper portions 11a protruding outward in the radial direction, respectively. A notch 101c extending in the axial direction is formed at one position in the circumferential direction of the ring gear support portion of the transfer case 101 for the purpose of adjusting the mounting position of the damper ring 10 and facilitating mounting of the snap ring. , both sides in the width direction of the stepped surface 101d of the cutout portion 101c, in 101d, by locking the damper body ₁₁ 1, 11 ₂ stopper 11a formed on, thereby achieving a detent of the damper ring 10.

Here, the damper ring 10 is not compressed even if the damper main body 11 is present at the position where the notch 101c is formed in the ring gear support portion of the transfer case 101, and does not function as a damper. Therefore, the damper body 11 is not provided at a position between the damper body ₁₁ 1, 11 ₂ having a stopper portion 11a which is engaged with the notch 101c, also of 180 degrees symmetrical positions to this A damper main body 11 is not provided near the coupling portions 12a and 12b for the purpose of balancing the supporting load with respect to the ring gear 106.

And out of the core 12, the portion extending between the damper body ₁₁ 1, 11 ₂ having a stopper portion 11a, extends continuously from the damper main body ₁₁ 1, 11 _2, the connecting member 13 and the rubber elastic body integrally Fins 14 are integrally provided.

As shown in FIG. 4, the fin 14 has a flat shape protruding from the connecting portion 13 in which the core material 12 is embedded to both sides in the axial direction. The axial width w of the protruding end portion of one of the fins 14 to the flared end portion of the other of the fin 14, the damper body 11 (11 1, _{11 2)} is substantially equal wire diameters between. Since the fin 14 has a smaller radial thickness t than the axial width w, the core material 12 has a function of making it difficult to bend in the axial direction and relatively easy to bend in the radial direction. Has.

In the manufacture of the damper ring 10 configured as described above, first, a core material 12 composed of a coil spring extending linearly is linearly arranged as shown in FIG. 2 using a mold (not shown). The plurality of damper main bodies 11, the connecting portion 13, and the fins 14 are integrally vulcanized and molded. Specifically, a plurality of damper body molding recesses and core material support recesses between them are formed in a straight line on the parting surface of the mold, and the width of the core material support recesses located in the middle of the longitudinal direction is formed. Fin molding recesses are formed on both sides in the direction, and the core material 12 is set in this mold so as to alternately pass through the damper body molding recesses and the core material support recesses, and then the mold is fastened. By mold clamping, unvulcanized rubber material is filled in the cavities defined between the recesses for molding the damper body, the recesses for supporting the core material, and the recesses for fin molding, and vulcanized. That is, the damper main body 11 is formed in the cavity between the damper main body molding recesses, the connecting portion 13 is formed between the core material supporting concave portions, and the fin 14 protruding from the connecting portion 13 is formed between the fin forming concave portions.

In this manner, be shaped as shown in FIG. 2, the molded article was taken out from the mold, while bent to the damper main body 11 _1, 11 ₂ stopper 11a formed on the faces radially outward, the core By connecting the connecting portions 12a and 12b at both ends of the twelve to each other, a ring shape as shown in FIG. 1 is formed.

In this case, the fins 14 provided integrally with the connecting member 13 between the damper body 11 _1, 11 _2, the protruding direction parallel to the direction of the stopper portion 11a is in the (radial thickness t direction in FIG. 4) bent Since it is easy and difficult to bend in the width w direction, the bending direction of the core material 12 is guided so that the stopper portion 11a faces outward in the radial direction.

Then, the damper ring 10 thus formed into an annular shape is attached as follows in the process of assembling the ring gear 106 to the transfer case 101 shown in FIG.

That is, first, the damper ring 10 is inserted into the inner peripheral surface 101b on the back side of the ring gear support portion of the transfer case 101. At this time, since the core material 12 that reinforces the damper ring 10 can be arbitrarily deformed, it can be easily inserted while being appropriately deformed.

Further, in the insertion process of the damper ring 10, the damper body 11 _1, 11 ₂ from projecting toward the radially outer stopper portion 11a, a 11a, notches formed on the inner peripheral surface of the ring gear supporting portion of the transfer case 101 It can be moved within 101c. Therefore, the stopper portions 11a and 11a can be locked to the stepped surfaces 101d and 101d on both sides of the notch portion 101c in the width direction to prevent the damper ring 10 from rotating.

Further, the twist of the damper ring 10 in the process of inserting into the transfer case 101 is suppressed by the fins 14 and 14 protruding from the connecting portion 13 between the damper main bodies 11 ₁ and 11 _{2 in} both axial directions, so that the damper main body 11 _1, 11 ₂ which is formed in the stopper portion 11a, 11a is maintained a state facing radially outward, thus the stopper portions 11a, 11a, and both sides in the width direction of the stepped surface 101d of the notch 101c, securely engaged with the 101d It can be stopped.

Further, the damper ring 10 inserted into the inner peripheral surface 101b on the inner side of the ring gear support portion of the transfer case 101 in this way is compared with a damper ring 10 made of only a single rubber elastic body by the core material 12 made of a coil spring. Because of its high rigidity, it is maintained in a circular state along the inner peripheral surface 101b on the inner side of the ring gear support portion. Therefore, before the damper ring 10 is supported from the inner peripheral side by the front outer peripheral surface 106b of the ring gear 106 inserted thereafter, the damper ring 10 cannot withstand the deformation force due to its own weight, and the transfer case 101 It is possible to effectively prevent the ring gear support portion from being bent downward from the upper inner peripheral surface, being bitten by the ring gear 106, or being cut off.

Next, FIGS. 5 to 7 show a second embodiment of damping according to the present invention. In the damper ring 10 of this second embodiment, and it is different from the first embodiment described above, among the core 12, the portion extending between the damper body 11 _1, 11 ₂ having a stopper portion 11a, In addition to the fins 14 and 14 projecting to both sides in the axial direction, orthogonality extending from the position between the fins 14 and 14 in the direction orthogonal to the fins 14, specifically, in the projecting direction (diameter outside) of the stopper portion 11a. It is at the point where the fin 15 is provided. Like the fins 14, the orthogonal fins 15 can also be formed at the same time when the damper main body 11 (and the connecting portion 13) is integrally vulcanized with the core material 12. Other configurations are the same as those in the first embodiment.

Specifically, as shown in FIG. 7, the orthogonal fin 15 has substantially the same size as the fin 14 on one side, and has a flat shape protruding outward in the radial direction from the connecting portion 13 in which the core material 12 is embedded. When the core material 12 is bent in a direction in which the stopper portion 11a is radially outward, such bending is relatively easily allowed, but in the opposite direction, that is, the stopper portion 11a is radially inward. When the core material 12 is to be bent in the direction of

Therefore, in addition to the functions of the fins 14 and 14 that guide the bending of the core material 12 in the direction parallel to the protruding direction of the stopper portion 11a, as described above, the orthogonal fins 15 make the stopper portion 11a radially inward. Since it becomes difficult to bend in such a direction, the core material 12 can be surely bent so that the stopper portion 11a faces the outer side in the radial direction from the linear shape shown in FIG. 6 to obtain the shape shown in FIG. it can.

In addition to the fins 14, 14 which projects axially on both sides, by providing the orthogonal fins 15 which projects in a direction perpendicular thereto, rigidity be further increased with respect to torsion between the damper body 11 _1, 11 ₂ Can be done.

In the first and second embodiments described above, the core material 12 has been described as being made of a coil spring made of spring steel, but the core material 12 is a metal such as spring steel that is not spirally wound. Alternatively, it may be made of a wire made of synthetic resin.

Further, when the core material 12 is made of a coil spring made of spring steel as in the first and second embodiments described above, the unsulfided rubber material is used in the molding process of the damper body 11 by the mold. Since it flows from the inside of the damper body molding cavity into the core material support portion along the inner circumference of the coil spring, a connecting portion 13 integrated with the coil spring is formed between the adjacent damper bodies 11 and 11, but the core When the material 12 is made of a metal such as spring steel or a wire made of synthetic resin that is not spirally wound, the damper bodies 11, 11, ... Are connected only through the core material 12. Can be.

Further, in the first and second embodiments described above, the fins 14 projecting in the axial direction or the orthogonal fins 15 projecting in the radial direction are the damper main bodies 11 ₁ , 11 having the stopper portion 11a of the core material 12. is provided only in a portion extending between the _2, further damper body 11 _1, 11 may also be provided in a portion extending between the _two other than the damper body 11, 11 of the core member 12.

Further, in the first and second embodiments described above, the stopper portion 11a faces radially outward in order to lock the stopper portion 11a in the notch portion 101c of the transfer case 101. , It can be applied to the case where it faces inward in the radial direction or when it faces in another direction, and the shape of the stopper portion 11a is also the shape of the notch portion 101c for locking the stopper portion 11a. It is decided according to.

10 Damper ring 11 Damper body 11a Stopper part 12 Core material 12a, 12b Coupling part 13 Connecting part 14 Fin 15 Orthogonal fin 101 Transfer case (outer peripheral side member)
101c Notch 101d Step surface 106 Ring gear (inner peripheral side member)

Claims (3)

A plurality of damper bodies made of rubber elastic bodies arranged concentrically with each other in an annular gap between the inner peripheral side member and the outer peripheral side member and interposed at appropriate intervals in a state of being arranged in the circumferential direction, and each damper. A stopper portion that is embedded in the main body and is provided with a core material that connects the damper main bodies to each other, and is locked to a notch formed in the inner peripheral side member or the outer peripheral side member is formed in the damper main body. The core material is made of a material that is more rigid than the rubber elastic body and has appropriate elasticity, and is made of a rubber elastic body that projects on both sides in the axial direction and extends between the damper bodies. Rutotomoni provided with a fin,
The dampering is characterized in that the core material is a wire or a coil spring . A plurality of damper bodies made of rubber elastic bodies arranged concentrically with each other in an annular gap between the inner peripheral side member and the outer peripheral side member and interposed at appropriate intervals in a state of being arranged in the circumferential direction, and each damper. A stopper portion that is embedded in the main body and is provided with a core material that connects the damper main bodies to each other, and is locked to a notch formed in the inner peripheral side member or the outer peripheral side member is formed in the damper main body. The core material is made of a material that is more rigid than the rubber elastic body and has appropriate elasticity, and is made of a rubber elastic body that projects on both sides in the axial direction and extends between the damper bodies. With fins
Fins, it features and to holder Nparingu to be located between the damper body the stopper portion is formed. A plurality of damper bodies made of rubber elastic bodies arranged concentrically with each other in an annular gap between the inner peripheral side member and the outer peripheral side member and interposed at appropriate intervals in a state of being arranged in the circumferential direction, and each damper. A stopper portion that is embedded in the main body and is provided with a core material that connects the damper main bodies to each other, and is locked to a notch formed in the inner peripheral side member or the outer peripheral side member is formed in the damper main body. The core material is made of a material that is more rigid than the rubber elastic body and has appropriate elasticity, and is made of a rubber elastic body that projects on both sides in the axial direction and extends between the damper bodies. With fins
The core material, wherein the to holder Nparingu in that a quadrature fins made of a rubber elastic material extending between the damper body with overhang the position between the axially opposite sides of the fin in a direction perpendicular to the fin.

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