JP2018084311A - Rotary meshing type engagement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more smoothly engage a sleeve and a piece for transmitting power of a hub to the piece relatively rotated to a rotating shaft.SOLUTION: A meshing internal tooth 12A is formed on an inner peripheral part of a sleeve 3, and a meshing tooth groove 14A for positioning the meshing internal tooth 12A is formed on an outer peripheral part of a hub 2. An external tooth 8 capable of being meshed with the meshing internal tooth 12A is formed on an outer peripheral part of a piece 7. An inclined guide internal tooth 12B is formed between adjacent meshing internal teeth. A guide tooth groove 14B disposed along a tooth trace direction of the guide internal tooth 12B for positioning the guide internal tooth 12B is formed on the outer peripheral part of the hub 2. A space to allow the sleeve to be moved in an axial direction of a rotating shaft and to be relatively rotated to the hub is formed between the meshing internal tooth 12A and the meshing tooth groove 14A.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a rotary meshing engagement device.

  A conventional rotary meshing engagement device includes a rotary shaft that transmits power, and a hub that is mounted to rotate integrally with an outer peripheral portion of the rotary shaft. A sleeve is mounted on the outer peripheral portion of the hub and supported so as to be slidable in the axial direction of the rotating shaft. The pieces are supported on the outer peripheral portion of the rotary shaft so as to be relatively rotatable and are arranged side by side in the axial direction of the hub and the rotary shaft. A plurality of meshing internal teeth are formed on the inner peripheral portion of the sleeve. A plurality of meshing teeth grooves are formed on the outer peripheral portion of the hub for positioning and meshing the plurality of meshing inner teeth. A plurality of external teeth that can mesh with the plurality of meshing internal teeth are formed on the outer peripheral portion of the piece. The plurality of meshing internal teeth and the plurality of external teeth are selectively meshed and disengaged according to the sliding movement of the sleeve in the axial direction of the rotation shaft.

  In such a rotation meshing type engagement device, when the sleeve slides in the axial direction of the rotation shaft and the meshing internal teeth of the sleeve mesh with the external teeth of the piece, the meshing internal teeth And the inclined surfaces of the chamfers respectively formed at the end portions of the external teeth come into contact with each other. Further, the sleeve rotates relative to the piece, the phase thereof is adjusted appropriately, and the meshing can be performed smoothly.

  However, if the chamfers of the internal teeth for engagement and the chamfers of the external teeth are in contact with each other at portions other than the inclined surfaces, the phase adjustment is properly performed. It becomes difficult to do.

  In order to prevent such inconvenience, for example, Patent Document 1 discloses that the meshing inner teeth of the sleeve and the meshing gear grooves of the hub are formed in an oblique direction with respect to the rotation shaft. A rotary meshing engagement device is disclosed in which a use internal tooth contacts an external tooth of a piece from an oblique direction. With this configuration, the sleeve smoothly engages with the piece.

International Publication No. 2010/122664 Pamphlet

  In the case of the rotary meshing type engagement device of Patent Document 1, the sleeve smoothly moves in comparison with the sleeve in which the meshing inner teeth of the sleeve and the meshing gear grooves of the hub are parallel to the rotation shaft. The chamfers formed at the end portions of the inner teeth for engagement of the sleeve and the end portions of the outer teeth forming the engagement tooth grooves are also connected to the rotating shaft. Facing diagonally. Therefore, when the portions of the chamfer that have no scraping action contact each other, it may be difficult for the sleeve to smoothly engage with the piece.

  An object of the present invention is to smoothly engage a sleeve with a piece.

  In order to solve the above problems, a rotating shaft that transmits power, a hub that is mounted to rotate integrally with the outer periphery of the rotating shaft, a rotating shaft that transmits power, and a rotating shaft that rotates integrally with the outer periphery of the rotating shaft. A hub mounted on the outer periphery of the hub, and a sleeve mounted on the outer periphery of the hub and supported so as to be slidable in the axial direction of the rotary shaft, and supported on the outer peripheral portion of the rotary shaft so as to be rotatable relative to the hub. A plurality of meshing internal teeth formed on the inner peripheral portion of the sleeve, and the plurality of meshing internal teeth on the outer peripheral portion of the hub. Correspondingly, a plurality of meshing teeth grooves that are always meshed are formed, and a plurality of external teeth that can mesh with the plurality of meshing internal teeth are formed on the outer peripheral portion of the piece, and the rotation of the sleeve By sliding the shaft in the axial direction A plurality of meshing inner teeth of the sleeve and a plurality of the meshing external teeth of the piece for engaging and releasing meshing, and for the adjacent meshing in the inner peripheral portion of the sleeve Between the internal teeth, guide internal teeth inclined with respect to the meshing internal teeth are formed, and the length of the guide internal teeth in the axial direction of the rotating shaft is the length of the meshing internal teeth. A guide tooth groove along the tooth trace direction of the guide inner tooth and where the guide inner tooth is located is formed separately from the meshing tooth groove on the outer peripheral portion of the hub. The sleeve is allowed to rotate relative to the hub in one direction due to the movement of the guide inner teeth in the guide tooth groove accompanying the movement of the sleeve in the axial direction of the rotation shaft. Space is located between the meshing internal teeth and the meshing internal teeth That is being formed between the mating teeth grooves.

  The meshing tooth gap may be formed in a tooth trace direction of the meshing internal tooth.

  The meshing inner teeth may be formed in a direction parallel to the rotation axis.

  The internal teeth for guide and the guide tooth groove for adjusting the sleeve to an appropriate phase with respect to the piece are formed separately from the internal teeth for engagement and the tooth groove for engagement, and the internal teeth for engagement and the engagement teeth Since a space allowing movement is formed between the groove and the sleeve, the sleeve can be more smoothly engaged with the piece.

It is sectional drawing which shows the principal part structure of the synchronous meshing apparatus of the transmission to which the rotation meshing type engagement apparatus of this invention is applied. It is a fragmentary fragmentary sectional view of a sleeve, a hub, and a transmission gear. (A) is explanatory drawing which shows the state which positioned the sleeve in the neutral position, (B) is explanatory drawing which shows the state in the middle of the sleeve slidingly moving from the neutral position to the shift position, (C) FIG. 9 is an explanatory view showing a state in which the slide of the sleeve to the shift position is completed. It is explanatory drawing explaining the structure of the modification of this invention.

  FIG. 1 is a cross-sectional view showing a main configuration of a synchronous meshing device of a transmission to which a rotary meshing engagement device of the present invention is applied, and FIG. 2 is a partial sectional view of a sleeve, a hub, and a transmission gear. . The transmission includes an input shaft (not shown) through which power of the engine is transmitted, and a counter shaft (rotary shaft) 1 that is arranged in parallel with the input shaft and outputs power to the wheel side via a differential device or the like. Yes.

  A synchronous meshing device which is a kind of rotational meshing engagement device includes a counter-shaft 1, a ring-shaped hub 2 mounted on the outer periphery of the countershaft 1 so as to rotate integrally with the countershaft 1, and a hub 2. Ring-shaped sleeve 3 mounted on the outer periphery of the sleeve, gears 4 and 4 disposed on both sides of the counter shaft 1 in the hub 2 and the sleeve 3, respectively, and disposed between the gears 4 and 4 and the hub 3, respectively. And a synchronizer ring 5 having the same axis as the counter shaft 1.

  One of the two gears 4 and 4 is a large-diameter low-speed gear 4A, and the other is a small-diameter high-speed gear 4B. The low speed gear 4A always meshes with a small-diameter low-speed gear (not shown) that rotates integrally with the input shaft, and the high-speed gear 4B always meshes with a large-diameter high-speed gear (not shown) that rotates integrally with the input shaft. Each gear 4 is supported on the counter shaft 1 by a bearing 6 so as to be relatively rotatable. A piece 7 formed in a ring shape having the same axis as the counter shaft 1 is integrally formed in a portion of each gear 4 adjacent to the hub 2.

  A plurality of outer teeth 8 parallel to the counter shaft 1 are uniformly formed on the outer peripheral surface of the piece 7 over the entire circumferential direction. In other words, the tooth trace direction of the external teeth 8 is directed in the direction parallel to the counter shaft 1 (the axial direction of the counter shaft 1). The outer peripheral surface of the portion protruding from each piece 7 toward the hub 2 becomes a friction surface 9 a formed in a truncated cone shape having the same axis as the counter shaft 1.

  The inner peripheral surface of the hub 2 and the outer peripheral surface of the counter shaft 1 are splined by spline teeth 1a and 2a. As a result, the hub 2 rotates integrally with the counter shaft 1. A plurality of external teeth 11 are formed on the outer peripheral surface of the hub 2.

  The synchronizer ring 1 is supported so as to be slidable in the axial direction of the counter shaft 1. The inner peripheral surface of the synchronizer ring 1 is formed into a tapered shape into which the friction surfaces 9a and 9a are fitted and inserted, and constitutes friction surfaces 9b and 9b. On the other hand, a plurality of external teeth 5a parallel to the counter shaft 1 are formed on the outer peripheral portion of the synchronizer ring 1 over the entire circumferential direction.

  On the inner peripheral surface of the sleeve 3, a plurality of inner teeth 12 that always mesh with the outer teeth 11 are formed. The sleeve 3 is supported by the external teeth 11 and the internal teeth 12 so as to be slidable in the axial direction of the counter shaft 1 with respect to the hub 2, and the sleeve 3 and the hub 2 rotate integrally. .

  The external teeth 8, 5a, 11 arranged in the axial direction of the counter shaft 1 are arranged so that the internal teeth 12 can mesh with the external teeth 8 and the external teeth 5a. The distance from is set to be the same or substantially the same.

  On the outer peripheral surface of the sleeve 3, there is formed an engagement groove 3a with which the shift fork 13 is fitted and engaged. The sleeve 3 is slid in the axial direction of the counter shaft 1 by the shift fork 13. More specifically, the shift fork 13 causes the sleeve 3 to slide from a neutral position shown in FIG. Shift to the side.

  When the sleeve 3 is slid from the neutral position toward the shift position, first, the outer teeth 5a and the inner teeth 12 on the slide side mesh with each other, and the sleeve 3 and the synchronizer ring 5 rotate together, and the slide side The friction surface 9b is pressed against the friction surface 9b, and a frictional force is generated between the two. The slide-side piece 7 (gear 4) rotates as the counter shaft 1 rotates. Further, when the sleeve 3 is slid to the shift position side, the frictional force is increased, and the slide-side piece 7 (transmission gear 4) is rotated integrally with the counter shaft 1. When the sleeve 3 is further slid to the shift position side, the inner teeth 12 of the sleeve 3 engage with the outer teeth 8 with the piece 7, and the sleeve 3 is slid to the shift position to complete the shift operation.

  In order to smoothly engage the sleeve 3 and the piece 7 during the shift operation, it is necessary to appropriately adjust the relative rotational position (phase) of the sleeve 3 and the piece 7.

  FIG. 3A is an explanatory view showing a state where the sleeve is positioned at the neutral position, and FIG. 3B is an explanatory view showing a state where the sleeve is slid from the neutral position to the shift position. C) is an explanatory view showing a state in which the sliding of the sleeve to the shift position is completed.

  As shown in FIGS. 2 and 3, the inner peripheral surface of the sleeve 12 has a plurality of meshing internal teeth 12 </ b> A that mesh with the external teeth 8 of the piece 7 as the internal teeth 12, and for adjusting the relative rotational position. A plurality of guide inner teeth 12B are provided. The plurality of internal teeth for engagement 12A are evenly arranged at predetermined intervals over the entire circumference of the sleeve 12 in the circumferential direction. The plurality of guide internal teeth 12 </ b> B are also arranged at predetermined intervals over the entire circumference in the circumferential direction of the sleeve 12. The guide inner teeth 12 </ b> B and the meshing inner teeth 12 </ b> A are alternately arranged in the circumferential direction of the sleeve 12.

  The meshing internal teeth 12 </ b> A have the tooth trace direction oriented in a direction parallel to the counter shaft 1. In the guide internal teeth 12B, the tooth trace direction is directed in a direction inclined with respect to the mesh internal teeth 12A. The length L2 of the guide inner teeth 12B projected onto the countershaft 1 (the axial length of the countershaft 1) L2 is set shorter than the length L1 of the meshing inner teeth 12A projected onto the countershaft 1. The guide inner teeth 12B are arranged at positions where the axial range of the counter shaft 1 is all within the axial range of the counter shaft 1 of the meshing inner teeth 12A.

  A chamfer 12a is formed at the end of the meshing inner tooth 12A that meshes with the external tooth 8 of the piece 7 in a wedge shape that tapers as viewed from the tooth surface side. Correspondingly, a chamfer 8a is formed in the outer teeth 8 of the piece 7 at the end engaging with the engaging inner teeth 12A in a wedge shape that is tapered when viewed from the tip surface side. These two chamfers 8 a and 12 a are oriented in the axial direction of the counter shaft 1.

  The plurality of external teeth 11 are arranged at predetermined intervals over the entire circumferential direction of the hub 2. Between the adjacent external teeth 11, 11, a tooth groove 14 for positioning the internal teeth 12 is formed. More specifically, as the tooth groove 14, a meshing tooth groove 14A that always positions the meshing inner teeth 12A and a guide tooth groove 14B that always positions the guiding inner teeth 12B are mutually arranged. Yes.

  The guide tooth groove 14B is formed in the tooth trace direction of the guide inner teeth 12B. The meshing tooth groove 14A is formed in a direction parallel to the counter shaft 1 in the same manner as the tooth trace direction of the meshing internal teeth 12A.

  As described above, when the sleeve 3 is slid from the neutral position toward the shift position, the guide inner teeth 12B are moved in an oblique direction with respect to the axial direction of the counter shaft 1 along the guide tooth grooves 14B. Guided (see FIGS. 3A and 3B). In this example, the tooth thickness of the guide internal teeth 12B and the groove width of the guide tooth groove 14B are the same or substantially the same, and no gap is formed between them. It may be designed slightly smaller than the groove width, and a gap may be formed between the two. However, in this case as well, it is necessary to provide a gap that does not impair the guide function.

  The sleeve 3 rotates relative to the hub 2 in the circumferential direction by the oblique movement of the guide inner teeth 12B in the guide tooth groove 14B. At this time, the meshing internal teeth 12A also move relative to each other in the circumferential direction of the hub 2 within the meshing tooth groove 14A, but the space S that allows this relative movement is the meshing tooth groove 14A (meshing). The tooth surfaces of the external teeth 11 and 11 constituting the tooth groove 14A) and the internal teeth 12A for meshing are formed.

  This space S needs to be provided separately for rotation in one direction of the counter shaft 1 and for rotation in the other direction. Since the transmission can be configured so that the countershaft 1 rotates only in one direction, it is sufficient to provide the space S for at least rotation in the one direction. A space S corresponding to the rotation in the direction is also provided.

  In this state, when the sleeve 3 is slid to the shift position, the meshing inner teeth 12A are relatively rotated to a position where they can mesh with the outer teeth 8, and the tooth surfaces of the two teeth 12A, 8 are brought together. Abut against each other (see FIG. 3C).

  During this engagement, the chamfers 8a and 12a also act as necessary to assist the proper phase adjustment operation. Further, when the meshing inner teeth 12A and the external teeth 8 are meshed, the guide inner teeth 12B remain in a state of being located in the guide tooth groove 14B by the above-described length setting. Become.

  According to the synchronous meshing device of the transmission configured as described above, the meshing internal teeth 12A and the external teeth 8 are used when the meshing internal teeth 12A of the sleeve 3 and the external teeth 8 of the piece 7 are meshed. The internal gear teeth 12A and the guide tooth grooves 14B that are inclined with respect to the axial direction of the counter shaft 1 parallel to the tooth trace direction of the counter teeth 1 move relative to the circumferential direction of the sleeve 3, It is possible to smoothly engage the two.

  Note that a mechanism for synchronizing rotation using the pair of contacting friction surfaces 9a and 9b is not necessarily essential, and a mechanism that performs rotation switching by stopping the rotation of the rotation shaft 1 or rotation of the input shaft and the counter shaft 1 is not necessary. Can be omitted by using a power source or a generator.

  Further, when the meshing inner teeth 12A are meshed with the external teeth 8, the meshing tooth grooves 14B are arranged such that the meshing internal teeth 12A come into contact with the external teeth 11 and the gap S is eliminated. Although the size may be designed, the size of the meshing tooth groove 14B may be designed so that a gap S is formed between both in this state.

  Further, the meshing internal teeth 12A can be prevented from coming into contact with the external teeth 11 and 11 constituting the meshing tooth groove 14A in the meshing tooth groove 14A. It is not essential to direct the direction of the tooth trace in the same direction as the tooth trace direction of the internal teeth 12A for meshing. For example, as shown in FIG. 4, the tooth trace direction of the meshing tooth groove 14A may be directed in the direction along the tooth trace direction of the guide tooth groove 14B.

1 Counter shaft (rotating shaft)
2 Hub 3 Sleeve 7 Piece 8 External tooth 12A Engaging internal tooth 12B Guide internal tooth 14A Engaging tooth groove 14B Guide tooth groove L1 Length L2 Length S Space

Claims (3)

A rotating shaft that transmits power;
A hub mounted to rotate integrally with the outer periphery of the rotating shaft;
A sleeve mounted on the outer periphery of the hub and supported so as to be slidable in the axial direction of the rotary shaft;
A piece that is supported on an outer peripheral portion of the rotary shaft so as to be relatively rotatable, and is arranged in the axial direction of the hub and the rotary shaft;
A plurality of meshing internal teeth are formed on the inner peripheral portion of the sleeve,
On the outer peripheral portion of the hub, there are formed a plurality of meshing teeth grooves corresponding to the plurality of meshing internal teeth and always meshing,
A plurality of external teeth that can mesh with the plurality of meshing internal teeth are formed on the outer peripheral portion of the piece,
The sleeve has a structure for engaging / disengaging the plurality of meshing internal teeth of the sleeve and the plurality of external teeth of the piece by sliding movement of the sleeve in the axial direction of the rotation shaft. ,
Between adjacent meshing inner teeth in the inner peripheral portion of the sleeve, guide inner teeth inclined with respect to the meshing inner teeth are formed,
The length of the guide inner teeth in the axial direction of the rotating shaft is shorter than the length of the meshing inner teeth,
In the outer peripheral portion of the hub, a guide tooth groove along the direction of the tooth trace of the guide inner tooth and where the guide inner tooth is located is formed separately from the meshing tooth groove,
The sleeve is allowed to rotate relative to the hub in one direction due to the movement of the guide inner teeth in the guide tooth groove accompanying the movement of the sleeve in the axial direction of the rotation shaft. A rotary meshing engagement device, wherein a space is formed between the meshing internal teeth and the meshing tooth groove in which the meshing internal teeth are located. The rotary meshing engagement device according to claim 1, wherein the meshing tooth groove is formed in a tooth trace direction of the meshing internal tooth. The rotary meshing engagement device according to claim 1, wherein the meshing internal teeth are formed in a direction parallel to the rotation shaft.

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