JP4334408B2 - Method for manufacturing constant velocity joint - Google Patents

Description

  The present invention relates to, for example, a method for manufacturing a constant velocity joint that connects one transmission shaft and the other transmission shaft in a driving force transmission portion of an automobile.

  Conventionally, in a driving force transmission unit of an automobile, a constant velocity joint that connects one transmission shaft and the other transmission shaft and transmits a rotational force to each axle is used.

  As a constant velocity joint according to this type of prior art, Patent Document 1 discloses a set of preventing rolling elements 3 (rollers, needles, etc.) from coming off at both axial ends of the cylindrical inner peripheral surface 2 of the roller 1. A flange portion (not shown) is formed, and a plurality of rolling elements 3 smaller than the total number are arranged in a series between the pair of flange portions of the cylindrical inner peripheral surface 2. Is set so that d2 <d1 and the difference (d1−d2) is several μm to several tens. The final rolling element 3a is press-fitted into the gap from the radially outer side of the cylindrical inner peripheral surface 2 of the roller 1 along the cylindrical inner peripheral surface 2 of the roller 1. A technical idea of mounting a plurality of rolling elements 3 in series is disclosed (see FIG. 20).

  A method of arranging a plurality of rolling elements 3 in series along the cylindrical inner peripheral surface 2 of the roller 1 in this manner is called a keystone method, and the roller 1 and the rolling element 3 are integrated as an assembly that does not separate. It is said that it can be attached to the leg shaft at the same time.

Japanese Patent Laid-Open No. 10-184717

  However, by applying the method for assembling the rolling elements disclosed in Patent Document 1, a plurality of rolling elements 3 that are one less than the total number between the pair of flanges of the cylindrical inner peripheral surface 2 of the roller 1 are annularly formed. For example, the rolling elements 3 are arranged one by one in order by mechanical means (not shown) such as a cam along the cylindrical inner peripheral surface 2 of the roller 1 rotating in the circumferential direction. If it is going to arrange, the clearance of the circumferential direction may generate | occur | produce between the some rolling elements 3 arranged along the cylinder internal peripheral surface 2, or the some rolling elements arranged along the cylindrical internal peripheral surface 2 The clearance generated between the three may be non-uniform.

  Therefore, even if it is going to press-fit the last one rolling element 3a from the radial outer direction of the cylindrical inner peripheral surface 2 of the roller 1 to the gaps at both ends of the plurality of rolling elements 3 arranged in a ring in this way, Because the press-fitting allowance is larger than the press-fitting allowance set in advance due to the clearance, it is difficult to press-fit the last one rolling element 3a, or it is possible to force press-fitting. However, there is a problem that the rolling elements 3, 3a are deformed.

  Furthermore, in the method of assembling the rolling elements disclosed in Patent Document 1, as shown in FIG. 20, when the last rolling element 3a is press-fitted into the gap, a pressing force (pressure) toward the outer diameter direction is applied. Since the input) is concentrated on the last rolling element 3a, a receiving member 4 for receiving the pressing force is required on the outer peripheral portion of the roller 1. As a result, there is a problem that the number of parts constituting the assembling apparatus increases and the manufacturing cost increases.

  A general object of the present invention is to generate a plurality of rolling elements even if circumferential clearance occurs between the plurality of rolling elements arranged along the inner diameter portion of the roller member or the generated circumferential clearance is not uniform. An object of the present invention is to provide a method for manufacturing a constant velocity joint that can be smoothly press-fitted along a gap.

  Another object of the present invention is to provide a method of manufacturing a constant velocity joint capable of further reducing the manufacturing cost by dispersing the pressing force during press-fitting and improving the assembly workability of the rolling element with respect to the roller member. There is to do.

  In this section, for ease of understanding, the reference numerals in the accompanying drawings will be described in parentheses. However, the contents described in this section should not be construed as being limited to those given the reference numerals.

The present invention includes a cylindrical outer member (12) that is provided with a plurality of guide grooves (18a to 18c) that are spaced apart from each other at a predetermined interval and extend along the axial direction, and is connected to one transmission shaft. A plurality of trunnions (26a to 26c) that bulge toward the guide groove, a ring-shaped roller member (30) that contacts the guide groove and is fitted on the trunnion, and the trunnion and the roller member. In a manufacturing method of a tripod type constant velocity joint provided with a plurality of rolling elements (28) interposed so as to freely roll between,
First and second flange portions (42, 44) that protrude inward in the radial direction and hold the rolling elements are formed at both end portions along the axial direction of the inner diameter portion (40) of the roller member (30). And
Except for the plurality of rolling elements (28a to 28c), the total number of rolling elements (28) are arranged along the inner diameter portion of the roller member, and then the plurality of removed rolling elements (28a to 28c) are arranged around the circumference. It is respectively distributed in the direction and simultaneously press-fitted into the gaps (56a to 56c) between the rolling elements along the radially outward direction of the inner diameter part (40).

  In this case, the plurality of removed rolling elements may be inserted into the cam groove of the cam, and then pressed into the gap at the same time by being pressed outward in the radial direction by the pressing surface of the cam rotating in a predetermined direction. The plurality of removed rolling elements can be easily press-fitted simultaneously into the gap by the rotation of the cam. The plurality of removed rolling elements are arranged at equal angular intervals along the circumferential direction and are simultaneously press-fitted, whereby the pressing load when the rolling elements are press-fitted is dispersed, Each load is preferably canceled out.

  Further, the plurality of removed rolling elements are simultaneously press-fitted by an arm having a pair of gripping claws pivotally supported by pins, respectively, or by a jig that is displaced along the axial direction of the inner diameter portion of the roller member. It is good to press fit at the same time.

  According to the present invention, after all of the rolling elements except for the plurality of rolling elements are arranged along the inner diameter portion of the roller member, the removed rolling elements are individually dispersed along the circumferential direction. Furthermore, since it is press-fitted into the gap between the rolling elements along the radially outward direction (lateral direction perpendicular to the axis) with respect to the inner diameter of the roller member, the assembly workability of the rolling element with respect to the roller member is improved. Manufacturing cost can be further reduced.

  In this case, when the individual rolling elements distributed along the circumferential direction are press-fitted into the gaps between the rolling elements, the number of the rolling elements already arranged between the gaps and the adjacent gaps is the same as the prior art. Since there are few compared, the force which makes the adjacent rolling elements already arranged in the inside diameter part approach easily acts, and each rolling element is smoothly press-fitted with respect to a plurality of gaps, respectively.

  Therefore, in the present invention, when all the rolling elements except for the plurality of rolling elements are arranged along the inner diameter portion of the roller member, a circumferential clearance is generated between the adjacent rolling elements in the circumferential direction, Alternatively, even when non-uniform circumferential clearance occurs, the removed plurality of rolling elements are smoothly pressed into the gaps.

  According to the present invention, the following effects can be obtained.

  That is, a circumferential clearance is generated between a plurality of rolling elements arranged along the inner diameter portion of the roller member, or even if the generated circumferential clearance is not uniform, the plurality of rolling elements are smoothly moved along the gap. Can be press-fitted into.

  In addition, the pressing force at the time of press-fitting can be dispersed to improve the assembly workability of the rolling element with respect to the roller member, and the manufacturing cost can be further reduced.

  A preferred embodiment of a method for manufacturing a constant velocity joint according to the present invention will be described in detail below with reference to the accompanying drawings.

  In FIG. 1, reference numeral 10 indicates a tripod type constant velocity joint manufactured by the method of manufacturing a constant velocity joint according to the embodiment of the present invention. The constant velocity joint 10 is one end of a first shaft (not shown). Are basically connected to a cylindrical outer cup (outer member) 12 having an opening and an inner member 16 fixed to one end of the second shaft 14 and accommodated in the hole of the outer cup 12. Composed.

  As shown in FIG. 1, three guide grooves 18 a to 18 c are formed on the inner wall surface of the outer cup 12. The three guide grooves 18 a to 18 c extend along the axial direction and are spaced by 120 degrees around the axis. (However, the guide grooves 18b and 18c are not shown). The guide grooves 18a to 18c are composed of a ceiling portion 20 having a curved section, and sliding portions 22a and 22b that are opposed to each other on both sides of the ceiling portion 20 and have a circular arc shape. .

  A spider 24 including a ring-shaped portion is connected to the second shaft 14, and the spider 24 is swelled toward the guide grooves 18 a to 18 c on the outer peripheral surface of the spider 24 at intervals of 120 degrees around the axis. The trunnions 26a to 26c are integrally formed (however, trunnions 26b and 26c are not shown).

  A ring-shaped roller member 30 is fitted around the outer periphery of the trunnion 26a (26b, 26c) via a plurality of rolling elements 28. In addition, the rolling element 28 should just be a rolling bearing containing a needle, a roller, etc., for example.

  As shown in FIG. 2, the outer circumferential surface of the roller member 30 has an arcuate surface portion 32 formed corresponding to the cross-sectional shape of the sliding portions 22a and 22b so as to come into surface contact with the sliding portions 22a and 22b. And a first annular inclined surface portion 36a continuous from the arcuate surface portion 32 to the first surface 34, and a second annular inclined surface portion 36b continuous from the arcuate surface portion 32 to the second surface 38.

  Further, an inner diameter portion 40 having a constant diameter and functioning as a rolling surface of the rolling element 28 is formed on the inner periphery of the roller member 30. An annular first flange portion 42 is formed integrally with an upper portion (one end portion) of the inner diameter portion 40 so as to protrude in a radial inward direction by a predetermined length. An annular second flange portion 44 is integrally provided at a lower portion (the other end portion) of the inner diameter portion 40 on the opposite side, and is formed so as to protrude by a predetermined length in the radial inward direction. Therefore, the rolling element 28 mounted in the inner diameter portion 40 of the roller member 30 is held from above and below by the first flange portion 42 and the second flange portion 44.

  The first flange portion 42 and the second flange portion 44 are integrally formed with the roller member 30 as shown in FIGS. 1 and 2, but are not limited thereto. For example, The rolling elements 28 may be configured to be held from above and below using a holding mechanism such as a washer (not shown) mounted via an annular groove (not shown) formed in the inner diameter portion 40 of the roller member 30. In this case, the washer may be used only in one or both of the vertical directions.

  As shown in FIG. 2, a lubricant (grease) is applied to the boundary portion between the inner diameter portion 40 of the roller member 30 and the first flange portion 42 and the second flange portion 44, as shown in FIG. 2. When this is done, annular grooves 46a, 46b that function as oil reservoirs are formed.

  In the inner diameter portion 40 of the roller member 30, a plurality of rolling elements 28 are juxtaposed in parallel along the circumferential direction, and the rolling elements 28 are radially inward at both ends of the inner diameter portion 40, as will be described later. The first flange portion 42 and the second flange portion 44 projecting in the direction are held so as not to be separated and dropped from the inner diameter portion 40. The plurality of rolling elements 28 loaded along the inner diameter portion 40 of the roller member 30 have substantially the same diameter and are formed in substantially the same shape. The trunnions 26a (26b, 26c) are formed in a columnar shape having a constant outer diameter.

  The constant velocity joint 10 manufactured by the method of manufacturing a constant velocity joint according to the present embodiment is basically configured as described above, and the operation and effect thereof will be described next.

  First, a first assembling method of the constant velocity joint 10 (an assembling method of the plurality of rolling elements 28 with respect to the inner diameter portion 40 of the roller member 30) will be described.

  A total number (predetermined number) of rolling elements 28 excluding three are loaded in the inner diameter portion 40 of the roller member 30. In this case, for example, as shown in FIG. 3, the first to third cam grooves 48 a to 48 c that are spaced apart at an equal angle along the circumferential direction and the cross-sectional arc shape continuous to the first to third cam grooves 48 a to 48 c. The cam member 52 having the first to third pressing surfaces 50a to 50c and rotatably provided in the direction of arrow A via a rotation driving means (not shown), and the roller member 30 according to the loading state of the rolling elements 28 A rolling element loading device provided with a rotating means (not shown) (for example, a step motor) that rotates in the direction of arrow B by a predetermined angle is used.

  Three rolling elements 28 conveyed through a plurality of shooters (not shown) are inserted into the first to third cam grooves 48a to 48c substantially simultaneously (see FIG. 3), and then the cam 52 is moved in the direction of arrow A. By rotating, the three rolling elements 28 are pressed substantially radially outward by the first to third pressing surfaces 50a to 50c continuous to the first to third cam grooves 48a to 48c, so that the roller member 30 The inner diameter portion 40 is loaded.

  When the first to third pressing surfaces 50a to 50c of the cam 52 are pressed radially outward, the three rolling elements 28 are guide grooves formed on a stage (not shown) on which the roller member 30 is placed. The guides 54a to 54c smoothly displace along the radial outward direction.

  Note that a lubricant (for example, grease or the like) is applied in advance to the wall surface of the inner diameter portion 40 of the roller member 30, and the rolling element 28 pressed into the inner diameter portion 40 of the roller member 30 has the lubricant. Is locked to the inner diameter portion 40.

  After the three rolling elements 28 are loaded into the inner diameter portion 40 of the roller member 30, the roller member 30 is rotated by a predetermined angle in the direction of arrow B under the biasing action of a rotating means (not shown). By sequentially repeating these steps, all the rolling elements 28 excluding the three rolling elements 28a to 28c are sequentially loaded into the inner diameter portion 40 of the roller member 30 (see FIGS. 4 and 5). At that time, as shown in FIG. 5, the plurality of rolling elements 28 arranged along the inner diameter portion 40 of the roller member 30 are separated by the first to third gaps 56 a to 56 c that are separated along the circumferential direction. Divided into a group of rolling elements. In other words, the first to third gaps 56a to 56c are formed between the rolling elements 28 at the end of the three sets of rolling elements arranged in an arc shape.

  In this case, a circumferential clearance C may occur between adjacent rolling elements 28 constituting the rolling element group, as shown in FIG. 5, and the circumferential clearance C is at random. It is formed unevenly.

  In addition, you may load all the rolling elements 28 except the said 3 collectively using the rolling element loading apparatus which is not shown in figure. The plurality of rolling elements 28 loaded in the inner diameter portion 40 of the roller member 30 may be held by the lubricant, or may be held by other mechanical or physical holding means (not shown). Also good. For example, there is a method of holding a plurality of rolling elements 28 loaded in the inner diameter portion 40 of the roller member 30 by a magnetic force of a magnet (not shown). Furthermore, the rolling element 28 may be loaded in a state where only the cam 52 is rotated along the direction of arrow A and the roller member 30 is stationary.

  The total number of the rolling elements 28 excluding the three rolling elements 28 a to 28 c (the number of the rolling elements 28 in FIG. 6 and FIG. 7 is not limited to 21 but is limited thereto) is the inner diameter portion 40 of the roller member 30. The three remaining rolling elements 28a to 28c are arranged in the arc-shaped three sets of rolling elements along the radius of the inner diameter portion 40 of the roller member 30 with respect to the first to third gaps 56a to 56c. It press-fits with the cam 52 along an outer direction (lateral direction) (refer FIGS. 5-7). After the remaining three rolling elements 28a to 28c are press-fitted into the first to third gaps 56a to 56c, a plurality of rolling elements 28 including the three rolling elements 28a to 28c are adjacent to each other. With the circumferential clearance C between the moving bodies, they are arranged in an annular shape along the inner diameter portion 40 of the roller member 30 so that the keystone effect can be generated (see FIG. 7).

  That is, the three rolling elements 28a to 28c are press-fitted into the first to third gaps 56a to 56c by rotating the cam 52 in the direction of arrow A as shown in FIG. By pressing the remaining rolling elements 28a-28c toward the first to third gaps 56a-56c radially outward by the first to third pressing surfaces 50a-50c continuous to the three cam grooves 48a-48c, substantially simultaneously. Carried out. The relationship between the minimum distance d2 of the first to third gaps 56a to 56c and the diameter d1 of the rolling elements 28a to 28c is set so as to satisfy d2 <d1 as in the prior art.

  The total number of rolling elements 28, 28 a to 28 c loaded in the inner diameter portion 40 of the roller member 30 in this manner are suitably held in the vertical direction between the first flange portion 42 and the second flange portion 44. At the same time, the occurrence of the keystone effect prevents separation / dropping of the roller member 30 from the inner diameter portion 40.

  As shown in FIG. 8, when all the rolling elements 28, 28 a to 28 c are held in series along the circumferential direction by the keystone effect, the outer peripheral surface of the rolling elements 28, 28 a to 28 c and the roller member 30. A clearance H in the radial direction is formed between the inner wall of the inner diameter portion 40. Moreover, in FIG. 8, the dashed-two dotted line K shows the virtual circle which connected each contact point of the adjacent rolling elements 28 and 28a-28c.

  In the first assembling method, the plurality of rolling elements 28 arranged along the inner diameter portion 40 of the roller member 30 are divided into three sets of rolling element groups (configured by six rolling elements 28), and the rolling elements are divided. Even if the circumferential clearance C between the adjacent rolling elements 28 constituting the moving body group is generated or the generated circumferential clearance C is not uniform, the rolling elements 28 are not deformed, and the first to third elements are not deformed. The three rolling elements 28a to 28c can be smoothly pressed into the gaps 56a to 56c.

  That is, in the prior art shown in FIG. 20, a series of rolling element groups are constituted by a plurality of rolling elements 3 excluding the last one rolling element 3a, and a nonuniform clearance is provided between the series of rolling element groups. When this occurs, the gap formed by the end of the series of rolling element groups becomes narrower, resulting in a press-fitting allowance larger than a preset press-fitting allowance and press-fitting the last one rolling element 3a into the gap. May not be possible. At that time, if the press-fitting load is increased and the last rolling element 3a is forced to be press-fitted, the last rolling element 3a to be press-fitted or the rolling element 3 on the press-fitting side may be deformed.

  On the other hand, in the first assembling method, since all the rolling elements except the last three are configured as the rolling element group divided into three sets, the rolling elements 28 constituting one rolling element group By reducing the number, the force that makes the adjacent rolling elements 28 approach each other when press-fitting easily acts, and the circumferential clearance C between the rolling elements 28 can be minimized.

  For example, as shown in FIG. 9, in the comparative example in which only the last one rolling element 28a is press-fitted, the single gap 56a into which the rolling element 28a is press-fitted and the position moved in the circumferential direction by about 180 degrees. When the circumferential clearance C1 between the rolling elements 28C and 28D is formed, the pressing force L when the last one rolling element 28a is press-fitted is caused by the adjacent rolling elements 28A and 28B constituting the gap 56a. Since it is transmitted in sequence along a plurality of rolling elements 28 that are branched into pressing forces L1 and L2 and arranged in the circumferential direction, the rolling elements 28C that are farthest from the adjacent rolling elements 28A and 28B. 28D, the pressing forces L1 and L2 act to make the circumferential clearance C1 zero or narrow.

  On the other hand, in this Embodiment, as FIG. 10 shows, each rolling element 28a-28c distributed along the circumferential direction is each press-fit in the 1st-3rd clearance gaps 56a-56c between rolling elements. The number of rolling elements 28 (rolling element group) already arranged between the first gap 56a and the adjacent second gap 56b (third gap 56c) is smaller than that of the comparative example, and The branched pressing forces L1 and L2 act in the direction in which they approach each other, and the force that causes the adjacent rolling elements 28 and 28 already arranged in the inner diameter portion 40 to approach each other easily (see the two-dot chain line in FIG. 10). ), The circumferential clearance C formed by the adjacent rolling elements 28, 28 can be made zero or narrow, and the individual rolling elements 28a-28c can be smoothly press-fitted into the plurality of gaps (56a-56c), respectively. it can.

  Therefore, in the first assembling method, even if the circumferential clearance C between the adjacent rolling elements 28 constituting the rolling element group is generated or the generated circumferential clearance C is not uniform, it is divided into three. The first to third gaps 56a to 56c formed by the end of the rolling element group thus formed can be suppressed to be close to a preset press-fitting allowance.

  In the first assembling method, a plurality of rolling elements 28 can be supplied almost simultaneously via a plurality of shooters (not shown), and the rolling elements 28a to 28c can be press-fitted almost simultaneously into the last three. Compared with the prior art in which only one of these is press-fitted, the cycle time can be shortened.

  Furthermore, in the first assembling method, the pressing load at the time of press-fitting does not concentrate at one place and can be dispersed at a plurality of places, so that the receiving member 4 as in the prior art becomes unnecessary. Therefore, the number of parts of the assembling apparatus can be reduced and the manufacturing cost can be reduced. In this case, in the first assembling method, the pressing loads at the time of press-fitting can be made to cancel each other depending on the arrangement angle of the plurality of rolling elements (28a to 28c) that are finally press-fitted.

  In the first assembling method, the number of rolling elements 28a to 28c that are finally press-fitted is set to three. However, the number of rolling elements 28a to 28c is not limited to this, and may be two or more.

  For example, as shown in FIG. 11, the total number of rolling elements (21 in FIG. 11) is reduced by setting the total number of rolling elements to 21 and setting the number of press-fitted rolling elements 28a to 28f to six. Thus, the circumferential clearance C can be easily made zero. In this case, the number of cam grooves formed in the cam 52 may be set corresponding to the number of the press-fits last.

  Further, as shown in FIG. 12, the number of rolling element groups arranged between the first gap 56a and the second gap 56b into which the two rolling elements 28a and 28b are press-fitted is, for example, seven ( I to VII) and 6 (I to VI) are not necessarily equal.

  As shown in FIGS. 13 and 14, in place of the cam 52, a plurality of arms 62a to 62c having a pair of gripping claws 60a and 60b pivotally supported by pins 58 are used as the last. You may make it press-fit in the state which hold | gripped the three rolling elements 28a-28c. The arms 62a to 62c are connected to a robot arm (not shown) that is displaced along multiple axes including the XYZ axes.

  After the roller assembly in which the plurality of rolling elements 28 and 28a to 28c are prevented from being separated and dropped from the inner diameter portion 40 of the roller member 30 in this way is formed, It is inserted along the direction and assembled to the spider 24. Further, as shown in FIG. 1, a spider 24 including a roller assembly is inserted into the hole of the outer cup 12, and three guide grooves 18 a to 18 c formed on the inner wall surface of the outer cup 12. Can be slidably assembled along.

  Next, a second assembling method of the rolling element 28 with respect to the inner diameter portion 40 of the roller member 30 is shown in FIGS.

  In the second assembling method, the first three rolling elements 28 a to 28 c are press-fitted using a jig 64 that moves up and down along the axial direction of the inner diameter portion 40 of the roller member 30. Different from the method.

  The jig 64 is formed of a cylindrical body connected to an elevating means (not shown). A tapered surface 66 that gradually decreases in diameter toward the tip end side is formed at the end of the cylindrical body. Three engagement grooves 68a to 68c having an arcuate cross section extending along the axial direction and spaced apart at equal angles along the circumferential direction are formed. As shown in FIG. 17, the engaging grooves 68a to 68c are arcuate surfaces having an arcuate cross section corresponding to the outer peripheral surface of the rolling element 28, and as shown in FIG. It is formed so as to incline at a predetermined angle corresponding to the moving body 28 and to gradually increase the depth of the groove toward the tip.

  In this case, the last three rolling elements 28a to 28c are loaded in a state inclined at a predetermined angle on the convex portion 72 of the holder 70 holding the roller member 30, and then the jig 64 is moved in the direction of arrow D. By lowering, the last three rolling elements 28a to 28c are engaged with engagement grooves 68a to 68c formed on the tapered surface 66 of the jig 64, and toward the radially outward direction (arrow E direction). Pressed and smoothly pressed into the first to third gaps 56a to 56c.

  The second assembling method has an advantage that the durability of the assembling apparatus can be improved by using the jig 64. Further, by loading the rolling element in an inclined state, the contact between the outer peripheral surface of the rolling element and the engagement groove of the jig gradually changes from line contact to surface contact, and the rolling element is press-fitted more smoothly. be able to.

  Next, a third assembly method is shown in FIGS.

  In this third assembling method, the three divided rolling element groups as in the first assembling method are not formed, and the last assembly is performed along the inner diameter portion 40 of the roller member 30 as shown in FIG. After all of the rolling elements 28 except for the three rolling elements 28a to 28c are collectively inserted at random, the roller member 30 is moved along the circumferential direction (in the directions of arrows F1 and F2) via vibration means (not shown). Vibrate only a small distance. Subsequently, as shown in FIG. 19, the last three rolling elements 28 a to 28 c are press-fitted using the jig 64, whereby the loading operation of the rolling elements 28 to the inner diameter portion 40 of the roller member 30 is completed. To do.

  In the third assembling method, since all the rolling elements 28 except for the last three rolling elements 28a to 28c are inserted at random along the inner diameter portion 40 of the roller member 30, the cycle time is reduced. In addition, when the entire number of rolling elements 28 except for the last three rolling elements 28 a to 28 c are arranged along the inner diameter portion 40 of the roller member 30, complicated and special mechanical operation becomes unnecessary. There is an advantage that the assembly work can be performed efficiently.

  The roller member 30 assembled by the first to third assembly methods is mounted along the guide grooves 18 a to 18 c of the outer cup 12 after being mounted on the trunnions 26 a to 26 c of the spider 24.

It is a partial expanded longitudinal cross-sectional view along the direction orthogonal to the axis line of the constant velocity joint manufactured by the manufacturing method of the constant velocity joint which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the roller member which comprises the constant velocity joint shown in FIG. It is a cross-sectional explanatory drawing which shows the 1st assembly method which assembles the several rolling element with respect to the internal diameter part of a roller member. It is a cross-sectional explanatory drawing which shows the state by which the rolling element was arrange | positioned along the internal diameter part of the roller member with the cam. It is a cross-sectional explanatory drawing which shows the state by which the last three rolling elements were loaded in the cam groove. It is a cross-sectional explanatory drawing which shows the state by which the said last 3 rolling elements were press-fitted by the press surface of the cam. It is a cross-sectional explanatory view showing a state in which a plurality of rolling elements are loaded in an inner diameter portion of a roller member after the last three rolling elements are press-fitted into a gap. It is a cross-sectional explanatory view showing a state in which a plurality of rolling elements loaded in an inner diameter portion of a roller member exerts a keystone effect while having a radial clearance H with the inner wall of the inner diameter portion. It is an assembling method according to a comparative example, and is a cross-sectional explanatory view showing an action state of a pressing force when the last one rolling element is press-fitted into a gap. It is a 1st assembly method which concerns on this Embodiment, Comprising: It is a cross-sectional view which shows the action state of pressing force when the three rolling elements arrange | positioned disperse | distributed to the circumferential direction are press-fitted in a gap | interval. It is a 1st assembly method which concerns on this Embodiment, Comprising: It is a cross-sectional view which shows the state which press-fits six rolling elements arrange | positioned disperse | distributed to the circumferential direction in a gap | interval. It is a 1st assembly method which concerns on this Embodiment, Comprising: It is a cross-sectional view which shows the state where the rolling element group divided | segmented by the two rolling elements press-fit is not uniform. It is a cross-sectional explanatory drawing which shows the state which press-fits the last three rolling elements with an arm instead of the said cam. It is a cross-sectional explanatory drawing which shows the state which press-fits the last three rolling elements with an arm instead of the said cam. It is a longitudinal cross-sectional explanatory drawing which shows the 2nd assembly method using the jig | tool which raises / lowers along the axial direction of the internal diameter part of a roller member. It is a longitudinal cross-sectional explanatory drawing which shows the state by which a rolling element is press-fit by the engagement groove formed in the said jig | tool. It is a cross-sectional view along the XVII-XVII line of FIG. It is a cross-sectional explanatory drawing which shows the 3rd assembly method which has arrange | positioned several rolling elements at random along the internal diameter part of a roller member. FIG. 16 is a cross-sectional explanatory diagram illustrating a state in which the last three rolling elements are press-fitted using the jig illustrated in FIG. 15. In the constant velocity joint which concerns on a prior art, it is a cross-sectional view which shows the press injection method of the rolling element to the cylindrical internal peripheral surface of a roller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Constant velocity joint 16 ... Inner member 18a-18c ... Guide groove 26a-26c ... Trunnion 28, 28a-28f, 28A-28D ... Rolling element 30 ... Roller member 40 ... Inner diameter part 42, 44 ... Flange part 48a-48c ... Cam groove 50a-50c ... Pressing surface 52 ... Cam 54a-54c ... Guide groove 56a-56c ... Gap 58 ... Pin 60a, 60b ... Grip claw 62a-62c ... Arm 64 ... Jig 66 ... Tapered surface 68a-68c ... Engagement Groove 70 ... Holder

Claims (6)

A plurality of guide grooves that are spaced apart by a predetermined distance and extend along the axial direction are provided on the inner peripheral surface and are connected to one transmission shaft, and a plurality of trunnions that bulge toward the guide grooves A ring-shaped roller member that comes into contact with the guide groove and is externally fitted to the trunnion, and a plurality of rolling elements that are movably interposed between the trunnion and the roller member. In the constant velocity joint manufacturing method,
First and second flange portions that protrude inward in the radial direction and hold the rolling elements are formed at both ends along the axial direction of the inner diameter portion of the roller member,
Except for the plurality of rolling elements, the total number of rolling elements are arranged along the inner diameter portion of the roller member, and then the plurality of removed rolling elements are dispersed in the circumferential direction so as to be radially outward of the inner diameter portion. A method for manufacturing a constant velocity joint, wherein the joint is simultaneously press-fitted into a gap between the rolling elements along the line. In the manufacturing method of Claim 1,
The plurality of removed rolling elements are inserted into the cam groove of the cam and then pressed into the gaps simultaneously by being pressed radially outward by the pressing surface of the cam rotating in a predetermined direction. A method for manufacturing a constant velocity joint. In the manufacturing method of Claim 1,
The method of manufacturing a constant velocity joint, wherein the plurality of removed rolling elements are simultaneously press-fitted by an arm having a pair of gripping claws pivotally supported by pins. In the manufacturing method of Claim 1,
The method of manufacturing a constant velocity joint, wherein the plurality of removed rolling elements are simultaneously press-fitted by a jig that is displaced along an axial direction of an inner diameter portion of a roller member. In the manufacturing method of Claim 1,
When the total number of rolling elements excluding the plurality of rolling elements is arranged along the inner diameter portion of the roller member, there is a non-uniform circumferential clearance between the adjacent rolling elements in the circumferential direction. A method of manufacturing a characteristic constant velocity joint. In the manufacturing method of Claim 1,
The method of manufacturing a constant velocity joint, wherein the plurality of removed rolling elements are arranged in a state of being spaced apart at equal angles along a circumferential direction and are simultaneously press-fitted.

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