JPH04110230U - Synchronous meshing device - Google Patents

Abstract

(57) [Summary] [Purpose] This invention is a synchronous meshing device that can transmit the pressing force of the sleeve to the synchro ring via the synchro spring. The purpose is to improve the operability of [Structure] Here, a concave groove 20 is formed in the tooth tip surface 112 of the internal tooth 101 of the sleeve 10, and the diameter-expanding deformation portion e2 of the synchro spring 15, which expands and deforms in response to a pressing force, is fitted into the concave groove 20. This prevents interference between the enlarged diameter portion e2 and the inner teeth 101 of the sleeve 10.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention consists of a hub disposed within the gear train and integrally connected to the rotating shaft, and a hub that is located relative to the rotating shaft. A rotatably supported gear is integrally connected with a sleeve supported on the hub side. Prior to mating, synchronized operation is possible to eliminate the relative rotation difference between the gear and hub side. Synchronous meshing devices with synchronization means, especially those caused by axial movement of the sleeve. The pressing force is transmitted to the synchro ring via the synchro spring, and its sink The relative rotational difference between the gear and the hub side is adjusted according to the frictional sliding contact between the rolling ring and the gear side. Synchronous meshing device that can be removed and meshed together via a sleeve Regarding.

0002

[Conventional technology]

In the power transmission system of a vehicle, there is a transmission that changes the input rotation at a predetermined rotation ratio and outputs it. A transfer is installed that can branch and transmit the input rotation to multiple output rotation systems. ing. The meshing means in the gear train used in these transmissions and transfers are mutually exclusive. In order to smoothly engage and separate a pair of gears facing each other, Synchronization means are often added. This kind of synchronous meshing device constantly meshes the input and output side gears, A gear coaxially supported for relative rotation with one of the output shaft or input shaft. are configured for synchronous operation to eliminate relative rotation prior to engagement between the There is. An example of this synchronous meshing device is shown in FIG.

0003 Here, a speed gear 102 is supported on the rotating shaft 100 via a bearing 113. held. This speed gear 102 is integrally supported by the rotating shaft 100. A sleeve 104 is fitted onto the hub 103. vinegar On the side wall of the speed gear 102 on the hub side, there is a cone surface 105 and a clutch gear following it. 106 is formed. The outer circumferential cone surface 105 is provided with an inner circumferential cone surface 107. A synchro ring 108 is fitted onto the outside. This synchro ring 108 has teeth 11 0 and the side wall on the hub 103 side at equal intervals in the circumferential direction, here 120° Three protrusions 109 are provided at intervals. The three protrusions 109 are concave on the hub side. In addition, synchro springs 111 are engaged with the three protrusions 109. is fitted externally.

0004 Here, the sleeve 104 has inner teeth 1 at its center that mesh with the outer teeth of the hub 103. 12 are formed continuously in the circumferential direction, and as shown in FIG. It has a tooth width B, a tooth thickness T, and a tooth height H (see FIG. 5(b)). In particular, internal tooth 1 Of the 12 teeth, two teeth are spaced at equal intervals in the circumferential direction, here 120 degrees apart. is formed so that a side end protruding portion a protrudes from the tooth tip surface 114 thereof. Note that the side end protrusion a is mutually different from the three protrusions 109 on the synchro ring 108. They are arranged so that they do not interfere in the circumferential direction. Moreover, the side edges protrude Part a is attached in the axial direction S to the synchro spring 111 which is fitted externally while maintaining a ring shape. The amount of protrusion is set to an extent that a pressing force can be applied.

[0005] In such a keyless type synchronous meshing device, the sleeve 104 is axially When the sleeve 104 is slid in the The synchro spring 111 presses the synchro spring 111 and the synchro ring 1 Press 08.

[0006] Subsequently, the synchro spring 111 is elastically deformed as shown by the two-dot chain line in FIG. , the inner teeth 112 of the sleeve 104 ride over the synchro spring 111. So The internal tooth 112 has a tapered guide surface 114 on the tooth side of the synchro ring 10. This makes contact with the tapered guide surface 116 on the tooth side of the outer peripheral tooth 115 of No. 8. The inner circumferential cone surface 107 of the enclosure ring 108 is pressed against the outer circumferential cone surface 105, This friction synchronous operation on both sides is performed, and the rotation of the hub 103 and the speed gear 102 is performed. Differences are eliminated.

[0007]

[Problem that the idea aims to solve] At this point, the three side end protrusions a of the internal teeth 112 of the sleeve 104 are synchronized. As the ring 108 is pressed in the axial direction S, the synchro spring 111 is activated at three locations. The diameter-reducing deformation portion e1 is elastically deformed in the diameter-reducing direction to form a portion facing the three protrusions 109. The diameter-expanding deformation portion e2 is elastically deformed in the diameter-expanding direction. Therefore, each of the three diameter enlarged deformed portions e2 comes into contact with the tooth tip surface 114 of the inner tooth of the sleeve. This increases the sliding resistance of the sleeve 104 in the axial direction S, and the switching operation This is becoming a problem. The purpose of this invention is to provide a synchronous meshing device that can improve switching operability. It is in.

[0008]

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention includes a gear fitted externally to a rotating shaft so as to be relatively rotatable. A clutch gear that is integrally formed on the side of the gear and a clutch gear that rotates integrally with the rotating shaft. A sleeve whose internal teeth mesh with the hub, and a sleeve that is integrally formed on the side of the clutch gear. and a cone section that is disposed opposite to the hub, and a cone section that is externally fitted onto the cone section and is connected to each other. A sink that synchronizes the hub and the clutch gear side by sliding contact between the ring surfaces. rolling and the internal teeth at multiple locations in the circumferential direction of the sleeve from the tooth tip surface. a side end protrusion formed to protrude; and a side end protrusion that is fitted onto the synchro ring The synchro ring receives pressing force from the side end protrusions at multiple locations and transfers the pressing force to the synchro ring. and a synchro spring that transmits transmission to the synchro ring, and Both the synchro springs are supported at other locations apart from the multiple pressing locations. It is equipped with a plurality of protrusions, especially a few of the tip surfaces of the internal teeth of the sleeve. A recess is formed in at least a portion of the synchro spring. It is formed at a position opposite to the other diameter expanding deformation part where the number of pressing points is removed. It is characterized by.

[0009]

[Effect]

Other locations where multiple pressure points of the synchro spring are removed when the sleeve slides Even if the sleeve undergoes diameter expansion deformation, the diameter expansion deformation portion will cover at least one part of the tooth tip surface of the inner peripheral tooth of the sleeve. It fits into the groove formed in the sleeve to prevent interference between the expanded diameter part and the inner teeth of the sleeve. This prevents an increase in the sliding resistance of the sleeve.

0010

【Example】

Figure 1 shows the main parts of a synchronous meshing device as an embodiment of the present invention. . As shown in Fig. 2, the transmission M equipped with this synchronous meshing device is equipped with The input shaft 3 receives the output rotation of the latch, and the output shaft 2 is arranged on the same line as the same shaft. , and a counter shaft 4 installed opposite to these shafts 3 and 2 with a predetermined interval therebetween. , each of these shafts is pivotally supported by a casing (not shown). The input shaft 3 and the output shaft 2 are arranged opposite each other via a directly coupled 3-speed synchronous meshing device G3. , the input shaft 3 and the countershaft 4 are rotated a predetermined number of times by a pair of gears 7 and 8 that are always in mesh with each other. They rotate simultaneously while maintaining the rotation ratio. The countershaft 4 and the output shaft 2 have multiple speeds Each meshing device G1, G2, GR of 1st speed, 2nd speed, reverse so that the ratio can be achieved. Equipped with

[0011] In such a transmission M, there is a second speed as a synchronous meshing device to which the present invention is applied. A synchronous meshing device G2 is provided. In addition, here mainly two-speed synchronous type Although the meshing device G2 will be explained, other 1st speed and 3rd speed synchronous meshing devices G 1 and G3 are similarly configured.

0012 This two-speed synchronous meshing device G2 is an output that is pivotally supported by a casing (not shown). A power shaft 2 and a spindle externally fitted on the output shaft 2 through a bearing 12 so as to be relatively rotatable. The speed gear 1 is received from the counter shaft 4 side by meshing with the speed gear 1 appropriately. The digit rotation is transmitted to the output shaft 2, divided as appropriate, and connected to the counter on the speed gear 1 side. The rotation on the shaft 4 side is separated from the output shaft 2. The two-speed synchronous meshing device G2 includes a hub 9 that rotates integrally with the output shaft 2, and a hub 9 that rotates integrally with the output shaft 2. a sleeve 10 that meshes with the clutch gear 1, and a clutch gear that is integrally formed on the side of the speed gear 1. A 17 is integrally formed on the side of the clutch gear 17 and is provided opposite to the hub 9. The cone portion 18 and the cone surfaces 12 and 16 that are fitted onto the outside of the cone portion 18 and come into sliding contact with each other. The synchronizer ring 13 synchronizes the hub 9 and the clutch gear 17 side by and a synchro spring 15 that is fitted onto the synchro ring.

[0013] On the outer periphery of the hub 9, outer teeth 901 are continuously formed in the circumferential direction, and on one side, there are teeth 901 in the circumferential direction. Locking grooves are formed at regular intervals, into which the protrusions 132 of the synchro ring 13 are inserted by a predetermined amount. are fitted to allow for relative misalignment. As shown in FIGS. 4, 5(a) and 5(b), the sleeve 10 has a hub 9 in its center. Inner peripheral teeth 101 that mesh with outer peripheral teeth 901 are formed, and a shift (not shown) is formed on the outer peripheral wall. An annular engagement groove is formed in which the fork engages. Protruding from the tooth tip surface at multiple locations in the inner circumferential direction of the inner circumferential tooth 101 A side end protruding portion a is formed so as to. Here, three locations are placed at regular intervals in the circumferential direction, immediately. In other words, side end protrusions a are formed on each of the two teeth spaced apart by 120°. This side end protrusion The protruding portion a is configured to apply a pressing force in the axial direction S to the synchro spring 15. There is.

[0014] As shown in FIGS. 5(a) and 5(b), the tooth tip surface 11 of the internal tooth 101 of the sleeve 10 2, 3 maintains a 60° deviation from the circumferential portion where the inner end protrusion a is formed. A recess 20 is formed at the position and a position near the position. This groove 20 is a sink A shape that can prevent interference with the expanded diameter deformation part e2 of the lower spring 15 (see Figures 3 and 8). It is formed in the shape of A cone surface 16 is formed on the synchro ring 13, and outer peripheral teeth 131 are formed on the outer peripheral wall. The side wall on the hub 9 side (the front side of the paper in FIG. Three protrusions 132 are provided at intervals. These three protrusions 132 have synchronization A spring 15 is fitted onto the outside while maintaining a circular shape.

[0015] As shown in Fig. 8, the ring-shaped synchro spring 15 maintains a circular shape during normal operation. When the sleeve 10 is externally fitted and receives a pressing force from the side end protrusion a on the sleeve 10 side, 2 is shown in FIG. It is formed to be elastically deformable in the radial direction as shown by the dotted chain line. That is, side edge protrusion The part facing part a is deformed in the radial direction which is the axial direction, and from the radially reduced deformed part e1 The diameter-expanding deformation portion e2, which is located opposite the protrusion 132 shifted by 60°, undergoes diameter-expanding deformation.

[0016] Here, the operation of the two-speed synchronous meshing device shown in FIG. 1 will be described below. First, the fork of the speed change link system (not shown) moves from the neutral position S1 to the 2nd speed position S. When the sleeve 10 is switched to 2, the toothed side of the sleeve 10 The synchro spring 15 is pressed in the direction of the output shaft via the ring 15. in this case, The plurality of side end protrusions a of the teeth on the sleeve 10 side are deformed in the diameter reduction direction, and the diameter reduction deformation The diameter-expanding deformation portion e2, which is at a position opposite to the protrusion 132 shifted by 60° from the Ru. At this time, the enlarged diameter deformed portion e2 loosely fits into the recess 20 and comes into contact with the inner tooth 101. First, the sliding resistance on the sleeve 10 side does not increase. Furthermore, the synchro spring 15 is elastically deformed as shown by the two-dot chain line in FIG. The leaf 10 climbs over the synchro spring 15, and the tapered guide surface of the inner tooth This corresponds to the tapered guide surface of the outer tooth 131 of the black ring. After this, reduce the pressing force. The synchro ring 13 received from the tube 10 has its inner cone surface 16 aligned with the outer cone surface. By pressing 12, synchronous operation proceeds. After this, synchronous operation progresses and three The inner teeth 101 of the clutch gear 10 are connected to the outer teeth of the synchro ring 13 and the clutch gear 17. The two gears engage and the sleeve reaches the second gear position S2, completing the second gear shift.

[0017] Next, the fork of the speed change link system (not shown) moves from the second gear position S2 to the neutral position S. When the sleeve 10 is returned to the position shown in FIG. and from each tooth of the clutch gear 17, and further rides on the synchro spring 15. exceed. In this way, the sleeve 10 slides back and forth between the neutral position S1 and the second speed position S2. During this period, the enlarged diameter portion e2 of the synchro spring 15 loosely fits into the groove of the inner tooth. Therefore, it is possible to prevent sliding resistance from increasing when the sleeve 10 moves. Especially this Here, three diameter expansion deformations of the synchro spring 15 where the concave groove 20 is required are shown. Since it was formed only in the part facing the part e2, during heat treatment of the sleeve 10, It is possible to suppress the occurrence of distortion.

[0018] In addition, the fork of the speed change link system (not shown) allows the shift from the neutral position S1 to the 2nd speed position. When the sleeve 10 is switched to the third gear position S3 (indicated by a solid line in FIG. 2) opposite to S2, Similar effects can be obtained when In the above, the synchronous meshing device shown in Fig. 1 is installed in the speed change operation system of the transmission. However, other examples include the transfer's 2WD/4WD switching mechanism and the high-speed It can be similarly applied to a low switching mechanism. Furthermore, the concave groove 20 is formed on the tooth tip surface. It was formed at least only in the part facing the enlarged diameter deformation part e2, but it was formed uniformly in the circumferential direction. A groove may also be formed.

[0019]

[Effect of the idea]

As described above, the present invention allows the synchro spring to undergo diameter expansion deformation when the sleeve slides. Even if the diameter of the part is expanded, the expanded diameter part fits into the groove of the inner teeth of the sleeve and expands. This prevents interference between the radially deformed part and the inner tooth of the sleeve, which increases the sliding resistance of the sleeve. This prevents damage, improves operability during switching, prevents early wear, and prevents deterioration of durability. Wear.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of a synchronous meshing device as an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of a transmission equipped with the synchronous meshing device of FIG. 1;

FIG. 3 is an explanatory diagram of the operation of the synchro spring engaged with the synchro ring in FIG. 1;

FIG. 4 is a partial side view of the sleeve in FIG. 1;

5(a) is a plan view of the internal teeth on the sleeve in FIG. 4 viewed from A, and FIG. 5(b) is a sectional view taken along line BB in FIG. 4;

FIG. 6 is a schematic cross-sectional view of a conventional synchronous meshing device.

FIG. 7 is a partial plan view of internal teeth of a conventional sleeve.

8 is an explanatory diagram of the operation of the synchro spring in FIG. 6. FIG.

[Explanation of symbols]

1 Speed gear 2 Output shaft 9 hub 10 Sleeve 12 Outer cone surface 13 Synchro ring 15 Synchro spring 12,16 Cone surface 17 Clutch gear 18 Cone part 20 Concave groove 101 Internal teeth e1 Diameter reduction deformation part e2 Diameter expansion deformation part

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Yasushi Saeki Mitsubishi Motors, 5-33-8 Shiba, Minato-ku, Tokyo Inside Kogyo Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A gear externally fitted on a rotating shaft so as to be relatively rotatable, a clutch gear integrally formed on a side of the gear, a sleeve whose internal teeth mesh with a hub that rotates integrally with the rotating shaft, and the above-mentioned sleeve. A cone part that is integrally formed on the side of the clutch gear and is provided opposite to the hub, and a cone part that is fitted onto the outside of the cone part so that the cone surfaces of the two come into sliding contact to achieve synchronization between the hub and the clutch gear side. a synchronizer ring; a side end protrusion formed on a plurality of internal peripheral teeth in the circumferential direction of the sleeve so as to protrude from the tooth tip surface thereof; and a side end protruding portion that is externally fitted on the synchro ring and at a plurality of positions. a synchro spring that receives a pressing force from a protrusion and transmits the pressing force to the synchro ring; and a synchro spring that is formed on the outer peripheral wall of the synchro ring and supports the synchro spring at other points other than the plurality of pressing points. In the synchronous meshing device, a recess is formed in at least a part of the tip surface of the inner peripheral tooth of the sleeve, and the recess is formed at the plurality of pressing points of the synchro spring. A synchronous meshing device characterized in that it is formed at a position opposite to another diameter-expanding deformation part that is removed.