JP3758153B2 - Assembly tool for toroidal continuously variable transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an assembly jig for a toroidal type continuously variable transmission.
[0002]
[Prior art]
FIG. 4 shows a conventional toroidal type continuously variable transmission that can be used as a transmission for an automobile. This toroidal type continuously variable transmission is a so-called double cavity type toroidal type continuously variable transmission for high torque, and two input disks 2A and 2B and two output disks 3A and 3B are arranged on the outer periphery of the input shaft 1. It is attached to.
[0003]
An output gear 4 is rotatably supported on the outer periphery of the intermediate portion of the input shaft 1. Output disks 3A and 3B are connected to cylindrical flange portions 4a and 4a provided at the center of the output gear 4 by spline engagement. The output gear 4 is supported in a housing (not shown) via a partition wall 13 formed by coupling two members, so that the output gear 4 can be rotated about the axis O while being displaced in the direction of the axis O. Is blocked.
[0004]
A flange portion 1a is provided at the base end portion (left side surface in FIG. 4) of the input shaft 1, and an angular inner ring raceway 35 is formed on the inner surface of the flange portion 1a. A loading cam 7 to which torque is input is disposed in the vicinity of the flange portion 1a, and an angular outer ring raceway 37 is formed on the inner peripheral edge of the outer surface of the loading cam 7. A plurality of balls 39 are rotatably arranged between the inner ring raceway 35 and the outer ring raceway 37 to constitute an angular type ball bearing 41 which is a rolling bearing. The ball bearing 41 supports a thrust load of the pressing device 12 described later.
[0005]
Each input disk 2A, 2B is supported by the input shaft 1 via ball splines 6A, 6B so as to rotate integrally with the input shaft 1 and be displaced in the direction of the axis O of the input shaft 1. Yes. The ball splines 6A and 6B are formed of ball spline grooves 61A and 61B formed on the outer peripheral surface of the input shaft 1, ball spline grooves 62A and 62B formed on the inner peripheral surfaces of the input disks 2A and 2B, and the ball splines. It consists of a plurality of balls 63 interposed between the grooves 61A, 62A, 61B, 62B so as to roll freely.
[0006]
The output disks 3A and 3B are supported rotatably about the axis O of the input shaft 1 by needle bearings 5 and 5 interposed between the output disks 3A and 3B. Power rollers 11A and 11B are rotatably held between the inner surfaces (concave surfaces) 3a and 3b of the output disks 3A and 3B and the inner surfaces (concave surfaces) 2a and 2b of the input disks 2A and 2B.
[0007]
On the other hand, on the inner side surface of the loading cam 7, a driving side cam surface 7a, which is an uneven surface that wraps around the inner side surface in the circumferential direction, is formed. Of the inner and outer side surfaces of the input disk 2A on the front side (the left side in the figure), the outer surface facing the driving cam surface 7a of the loading cam 7 is a driven side which is an uneven surface extending in the circumferential direction. A cam surface 14 is formed. Between the driving cam surface 7a of the loading cam 7 and the driven cam surface 14 of the input disk 2A on the front side, a plurality of loading rollers 43 are rotatably held by a retainer 45, and the loading cam A pressing device 12 of the type is configured.
[0008]
A first disc spring 8 is provided between the input disc 2A on the front side and the loading cam 7, and a first disc spring 8 is provided between the input disc 2B on the rear side (right side in the figure) and the loading nut 9. Two disc springs 10 are provided. These disc springs 8 and 10 apply preload to the contact portions between the concave surfaces 2a, 2b, 3a and 3b of the respective disks 2A, 2B, 3A and 3B and the peripheral surfaces 11a and 11b of the power rollers 11A and 11B. It has become.
[0009]
The toroidal type continuously variable transmission of the above construction, when the torque to a drive shaft (not shown) with the engine operation is transmitted, the torque presses the input disk 2A of the front-side elastically to the output disk 3A of the front side It is transmitted to the input disk 2A on the front side via the pressing device 12 that is being transmitted, and is also transmitted to the input disk 2B on the rear side via the input shaft 1, and the input disks 2A and 2B rotate.
Torque input to the input disks 2A and 2B is transmitted to the output disks 3A and 3B at a constant speed ratio via the power rollers 11A and 11B. The rotations of the output disks 3A and 3B are transmitted from the output gear 4 to the output shaft (not shown) via the transmission gear 15 and the like.
[0010]
By the way, when assembling the toroidal-type continuously variable transmission configured as described above, each component is assembled inside the case that houses the main body of the toroidal-type continuously variable transmission. Here, a drive composed of a loading cam 7, a loading roller 43, a retainer 45, a ball 39 of a ball bearing 41, a disc spring 8, a ball 6A of a ball spline 6, a front input disk 2A and the like disposed on the input shaft 1 is provided. When the transmission unit 50 is assembled in a case that houses the main body of the toroidal-type continuously variable transmission, each drive transmission unit 50 that has been temporarily assembled on the input shaft 1 is not assembled together in the case. Parts are separated and cannot be assembled efficiently.
[0011]
If the loading roller 43 is not aligned with the driving cam surface 7a of the loading cam 7, when the loading nut 9 is tightened, the front input disk 2A is pushed to the front side from the actual initial position. It becomes a state. For this reason, the first disc spring 8 in the initial state is crushed more than usual, and an excessive preload is applied to the input disk 2A on the front side. The efficiency will be reduced.
[0012]
In order to solve the above problem, in Japanese Patent Laid-Open Nos. 2001-4001 and 2000-9196, a loading roller 43 held by a retainer 45 between the loading cam 7 and the input disk 2A on the front side. In the state where the position of the loading roller 43 is aligned with the drive side cam surface 7a of the loading cam 7, these are fixed by a plurality of bolts so that the parts are not separated.
[0013]
[Problems to be solved by the invention]
However, if a plurality of bolts are used as a jig for temporary assembly as described above, screw holes that are not necessary for the function must be processed into a loading cam, a retainer, an input disk, etc. Since it uses, processing cost will become high. Moreover, since the operation | work which fastens a some volt | bolt to each screw hole is required, temporary assembly work will become complicated.
[0014]
The present invention has been made in view of the above circumstances, and provides an assembly jig for a toroidal-type continuously variable transmission that can reduce processing costs and can easily perform temporary assembly work. Objective.
[0015]
[Means for Solving the Problems]
In order to solve the above-mentioned object, an invention described in claim 1 is directed to an input disk that is supported by an input shaft having a flange portion via a ball spline and rotates integrally with the input shaft; The drive transmission unit, which is provided between the flange of the input shaft and includes a pressing device that applies a pressing force corresponding to the input torque to the input disk, has a positional relationship after the assembly of the toroidal continuously variable transmission is completed. An assembly jig for a toroidal-type continuously variable transmission for temporary assembly to the input shaft,
A jig main body having a protrusion, and an attaching means for attaching the jig main body to the input shaft, the jig main body is in a state where the protrusion is inserted into the ball spline groove of the input shaft, The attachment means is attached to the input shaft so as to sandwich the drive transmission unit together with the flange portion of the input shaft, and the projection of the jig body abuts on the raised portion of the Bose spline groove of the input shaft. Thus, the movement of the assembly jig in the axial direction of the input shaft is restricted, and the drive transmission unit is restricted from moving away from the flange portion of the input shaft .
[0016]
In the first aspect of the invention, in order to temporarily assemble the drive transmission unit on the input shaft using the assembly jig, first, the drive transmission unit is in a positional relationship after the assembly of the toroidal continuously variable transmission is completed. Attach to the input shaft. Then, while inserting the protrusion of the jig body into the ball spline groove of the input shaft, the jig body is arranged on the input shaft so that the drive transmission unit is sandwiched between the jig body and the flange of the input shaft. The jig body is attached to the input shaft by attachment means.
[0017]
As described above, when the drive transmission unit is temporarily assembled to the input shaft by the assembly jig, even if the drive transmission unit moves in the axial direction of the input shaft, particularly in the direction away from the flange portion of the input shaft, the protrusion of the jig body. Since the movement of the assembly jig in the axial direction is restricted by abutting (locking) with the raised portion of the Bose spline groove of the input shaft, the movement of the drive transmission unit in the axial direction is restricted. Can do. Therefore, the drive transmission unit can be prevented from coming off the input shaft, and the drive transmission unit can be prevented from separating.
[0018]
In the present invention, the drive transmission unit can be made non-separable simply by inserting the protrusion of the jig body into the ball spline groove of the input shaft. Since the time and labor for joining can be saved, the time required for temporary assembly can be shortened and the temporary assembly work can be facilitated. Furthermore, it is not necessary to machine screw holes for bolts in the drive transmission unit pressing device or the input disk, and it is not necessary to prepare a plurality of bolts or the like for coupling the drive transmission unit, thereby reducing machining costs. be able to.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same components as those in FIG. 1 and 2 show a first embodiment of the present invention.
[0020]
As shown in FIG. 1, the input shaft 1 includes a ball 39 of a ball bearing 41, a loading cam 7, a cam roller 43, a retainer 45, a disc spring 8, a ball 63 of a ball spline 6A, a front input disk 2A, and the like. The drive transmission unit 50 is temporarily assembled by the assembly jig 51 shown in FIG. 2 so that the positional relationship after the assembly of the toroidal continuously variable transmission is completed.
[0021]
The assembly jig 51 includes a jig main body 53 having a substantially annular shape, and bolts (attachment means) 59 and 59 for attaching the jig main body 53 to the input shaft 1.
The jig body 53 has jig pieces 55 and 57 each formed in a substantially semi-annular shape, and the jig pieces 55 and 57 are engaged with the ball spline grooves 61 </ b> A of the input shaft 1. Protrusions 65, 65 are provided, and screw holes 55d, 55d, 57d, 57d into which bolts 59, 59 are screwed are formed. In addition, in the right jig piece 57 in FIG. 2, recessed portions 57 e and 57 e for accommodating the heads of the bolts 59 and 59 are formed.
Then, by joining the jig pieces 55, 55 with bolts 59, a disk-shaped hollow portion 53a having protrusions 65, 65 protruding inward is formed in the jig body 53, and Both end faces 55b, 57b, 55c, 57c of the jig pieces 55, 57 are flush with each other, and both end faces 53b, 53c of the jig body 53 are formed.
[0022]
Further, the protrusions 65 and 65 of the jig pieces 55 and 57 are provided so as to face each other in the hollow portion 53 a of the jig main body 53. These protrusions 65 and 65 are provided so as to be substantially the same height as the deepest part 61c of the ball spline groove 61A of the input shaft 1, and as shown in FIG. 1, the protrusions 65 and 65 of the hollow part 53a are ball balls. The contact of the assembly jig 51 in the direction of the axis O is restricted by coming into contact with the raised portion (groove wall portion of the ball spline groove 61A) 61d of the spline groove 61A.
[0023]
In order to temporarily assemble the drive transmission unit on the input shaft using the assembly jig 51 having the above-described configuration, the input shaft 1 is positioned so that the drive transmission unit 50 has a positional relationship after the assembly of the toroidal continuously variable transmission is completed. Then, the projection 65, 65 of the jig body 53 is inserted into the ball spline groove 61A of the input shaft 1, and the drive transmission unit 50 is sandwiched between the jig body 53 and the flange 1a of the input shaft 1. As described above, the jig body 53 is attached to the input shaft 1 with bolts 59 and 59.
[0024]
That is, after attaching the drive transmission unit 50 to the input shaft 1, the protrusions 65, 65 of the jig pieces 55, 57 are inserted into the ball spline grooves 61 A of the input shaft 1, and The inner peripheral surfaces 55a and 57a of the jig pieces 55 and 57 are arranged on the outer peripheral surface of the input shaft 1 while the front side end surfaces 55b and 57b abut against the rear side end surface 2c of the input disk 2A. These jig pieces 55 and 57 are coupled by bolts 59 and 59.
As a result, the front side end surfaces 55b and 57b of the assembly jig 51 abut against the rear side end surface 2c of the input disk 2A, and the drive transmission unit 50 is sandwiched between the assembly jig 51 and the flange portion 1a of the input shaft 1. It will be in the state.
[0025]
Thus, when the drive transmission unit 50 is temporarily assembled on the input shaft 1 using the assembly jig 51, the drive transmission unit 50 is in the direction of the axis O of the input shaft 1, particularly in the direction away from the flange 1 a of the input shaft 1. if you try to move in, by projections 65, 65 of the jig body 53 abuts against the ramped portion 61d of the ball spline grooves 61A of the input shaft 1, moves in the axial direction of the assembly jig 51 is restricted Therefore, the movement of the drive transmission unit 50 in the axis O direction can be restricted.
[0026]
Therefore, it is possible to prevent the drive transmission unit 50 from coming off the input shaft 1 and to prevent the parts of the drive transmission unit 50 from being separated. Moreover, ramped portion 61d of the bow Luz spline grooves 61A, projections 65, 65 are in contact is a portion where the ball of the ball spline 6A is not in contact during use of the toroidal type continuously variable transmission, a trouble in the function of the ball spline 6A Can be prevented.
[0027]
Further, since the projections 65 and 65 of the assembly jig 51 are merely engaged with the ball spline groove 61A of the input shaft 1, and the trouble of connecting the drive transmission unit with a plurality of bolts as in the prior art can be saved. It is possible to shorten the time required for the temporary assembly work and facilitate the temporary assembly work. Further, it is not necessary to machine screw holes for bolts in the loading cam 7 and the input disk 2A of the drive transmission unit 50, and it is not necessary to prepare a plurality of bolts for making the drive transmission unit 50 non-separable. Since it is good, processing cost can be reduced.
[0028]
Further, since the projections 65, 65 of the assembly jig 51 are engaged with the ball spline grooves 61A of the input shaft 1 at positions facing each other, rattling of the assembly jig 51 attached to the input shaft 1 is prevented. be able to.
Furthermore, since the assembly jig 51 can be separated into the jig pieces 55 and 57, when the assembly jig 51 is attached to the input shaft 1, the jig pieces 55 and 57 are arranged on the outer peripheral surface of the input shaft 1. However, the jig pieces 55 and 57 are simply coupled by the bolts 59 and 59. When the assembly jig 51 is removed from the input shaft 1, the assembly jig 51 is simply separated into the jig pieces 55 and 57. Therefore, the assembly jig 51 can be easily attached to and detached from the input shaft 1.
[0029]
FIG. 3 is a diagram showing a second embodiment of the present invention. In the second embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description is simplified.
[0030]
In the drive transmission unit 76 of the second embodiment, a locking collar 70 having an outer ring raceway 37 is attached to the loading cam 7, and between the locking collar 70 and the input disk 2A on the front side, A thrust needle bearing 72 and a disc spring 73 are provided in this order from the locking collar portion 70 side. Further, a disc spring 74 for preventing rattling between the locking hook 70 and the loading cam 7 is provided between the locking hook 70 and the loading cam 7.
[0031]
The disc spring 73 of the drive transmission unit 76 presses the locking collar 70 and the front input disk 2A, respectively, and only applies preload to the front input disk 2A. The pressing force in the direction of the axis O is larger than the disc spring 8 of the drive transmission unit 50 in FIG.
As a result, the drive transmission unit 76 according to the second embodiment is easier to separate than the drive transmission unit 50 according to the first embodiment. By using the same assembly jig 51 as that of the first embodiment, the same effects as those of the first embodiment can be obtained. Thus, the assembly jig 51 according to the present invention can be used regardless of the mechanism of the toroidal-type continuously variable transmission, and there is no need to use different jigs according to the mechanisms of the toroidal-type continuously variable transmission. Therefore, the processing cost can be further reduced.
[0032]
The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the invention. For example, in the present embodiment, the two protrusions 65, 65 are provided on the assembly jig 51. However, the present invention is not limited to this, and the number of the protrusions 65 may be one or three or more. good.
In this embodiment, bolts 59 and 59 are used as attachment means, and the jig pieces 55 and 57 are coupled by the bolts 59 and 59. However, instead of the bolts 59 and 59, wires or the like are used. Also good.
Further, in the present embodiment, the jig body 53 is configured by the two jig pieces 55 and 57, but may be configured by three or more jig pieces instead.
[0033]
【The invention's effect】
As described above, according to the first aspect of the invention, the movement of the drive transmission unit in the axial direction is restricted by the projection of the jig body being locked in the ball spline groove of the input shaft. Therefore, the drive transmission unit can be prevented from coming off the input shaft, and the drive transmission unit can be prevented from separating. Therefore, since the trouble of connecting the drive transmission unit with a plurality of bolts can be saved as in the prior art, the time required for the temporary assembly can be shortened and the temporary assembly work can be facilitated. Furthermore, it is not necessary to machine screw holes for bolts in the drive transmission unit pressing device or input disk, and it is not necessary to prepare multiple bolts etc. for non-separation of the drive transmission unit. Can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state in which a drive transmission unit according to a first embodiment of the present invention is temporarily assembled to an input shaft by an assembly jig.
2 is an enlarged cross-sectional view of the assembly jig shown in FIG. 1. FIG.
FIG. 3 is a cross-sectional view showing a state in which a drive transmission unit according to a second embodiment of the present invention is temporarily assembled to an input shaft by an assembly jig.
FIG. 4 is a cross-sectional view showing a conventional toroidal-type continuously variable transmission.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Input shaft 1a Eaves part 2A Input disk 6A Ball spline 12 Pressing device 51 Assembly jig 53 Jig body 59 Bolt (attachment means)
61A Ball spline groove 65 of input shaft

Claims (1)

An input disk supported by a ball spline on an input shaft having a flange and rotating integrally with the input shaft, and a pusher provided between the input disk and the flange of the input shaft and corresponding to the input torque. A toroidal continuously variable transmission for temporarily assembling a drive transmission unit having a pressing device for applying pressure to the input disk to the input shaft so as to have a positional relationship after the assembly of the toroidal continuously variable transmission is completed. Assembly jig,
A jig main body having a protrusion, and an attaching means for attaching the jig main body to the input shaft, the jig main body is in a state where the protrusion is inserted into the ball spline groove of the input shaft, The attachment means is attached to the input shaft so as to sandwich the drive transmission unit together with the flange portion of the input shaft, and the projection of the jig body abuts on the raised portion of the Bose spline groove of the input shaft. To restrict the movement of the assembly jig in the axial direction of the input shaft and restrict the drive transmission unit from moving away from the flange of the input shaft. Assembly jig for transmission.

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