JP2008144922A - Press-in device for sealant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simplified and inexpensive press-in device for sealant, not having many structural constraints of the sealant or an opening periphery, facilitating press-in work, and facilitating maintaining of quality. <P>SOLUTION: In the press-in device 1, the circular sealant is attached to an opening of a housing pierced by a shaft member. It is provided with a body 2 having a cylinder 21 opened in one end, a piston 6 arranged in the cylinder 21 and moving towards the opening side, a free engagement part engaged with one end of the piston 6 to tilt and move in an axial direction, a pressing part 4 connected to an opposite side of the free engagement part, a driving means for the piston 6, and plural arm members 3 pivotally supported on the body 2 to grasp and release the opening. The pressing part 4 is provided with a tube part 41 wherein the shaft member is inserted into an inner circumference to protect the sealant, and the sealant is arranged coaxially with the shaft member, and a circular plane aligning member 5 provided on an outer circumference side of the tube part 41, holding the sealing member in an inner circumference, and abutted on the opening. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a press-fitting device for assembling a seal material used in an oil-tight structure around a shaft of a vehicle transmission.

  The vehicle transmission includes an input shaft and an output shaft, and is configured to be connected to another device such as a transfer device to transmit a driving force. Also, in driving force transmission devices such as a vehicle transmission, lubricating oil is enclosed and used in a circulating manner to prevent functional deterioration due to internal heat generation and wear. Even when the shaft member is inserted through the housing of the device, an oil seal is generally used to prevent the lubricating oil from leaking out of the housing or coming and going to other devices. The oil seal is made of, for example, synthetic rubber and has an annular shape, and is often disposed in the gap between the shaft member and the housing.

  The oil seal described above is usually assembled by press fitting while applying a load from the shaft end after the assembly of the shaft member. In press-fitting, it is preferable that the shaft member and the oil seal are aligned with each other so that a uniform load is applied over the entire circumference of the oil seal. In order to reliably perform this press-fitting work, various press-fitting jigs have been invented. For example, Patent Literature 1 discloses a technique of a press-fitting jig that includes a guide portion, a contact portion, and a screwdriver portion and press-fits an oil seal into a camshaft. The guide portion has a tapered portion with a changing outer diameter, and is temporarily attached to the camshaft to form a press-fitting path. The contact portion is driven by the screwdriver, and the oil seal is moved and press-fitted.

On the other hand, the oil seal that is separated from the shaft member and held in the opening of the housing cannot make the shaft member a direct press-fitting path. For this reason, a method and an apparatus are employed in which the shaft center is obtained with reference to the other end of the shaft member opposite to the opening, and the oil seal is pressed along the shaft center.
JP 2006-68828 A

  By the way, in the press-fitting jig of Patent Document 1, since the oil seal is press-fitted along the shaft member, applicable structures are limited. In addition, the method and apparatus for obtaining the shaft center from the other end of the shaft member have increased versatility, but the manufacturing equipment has become large and expensive. Furthermore, in any of the methods, workers must pay close attention to prevent dust and moisture from adhering to the oil seal and damage to the oil seal itself, and it takes time and effort to maintain and manage quality. It was.

  The present invention has been made in view of the above background, and there are few structural constraints around the sealing material and the opening, the press-fitting operation is easy and the quality can be easily maintained, and the press-fitting of a simple and inexpensive sealing material is performed. Providing equipment.

  The press-fitting device for a sealing material of the present invention is a press-fitting device for assembling an annular sealing material into an opening of a housing through which a shaft member is inserted, and includes a main body having a cylinder opened at one end, A piston that moves to the opening side, a universal engagement portion that engages with one end of the piston so as to be axially movable and tiltable, and a pressure that connects the universal engagement portion to the opposite side of the piston And a drive means for driving the piston, and pivotally supported by the body so that the tip is opened and closed, the tip is closed and grips the outside of the opening, and the tip is opened and the opening is opened. A plurality of arm members for releasing the portion, and the pressing portion further houses the shaft member inserted therein to protect the seal material and arrange the seal material coaxially with the shaft member. Provided on the outer peripheral side of the tube portion and the tube portion Is to hold the inner circumference in the sealant in an annular, relatively displaced in the axial direction and is biased from the pressing portion, characterized in that it comprises a surface alignment member is brought into contact with the opening.

  In the present invention, a simple press-fitting device is arranged in the vicinity of the opening instead of a large-sized manufacturing facility that obtains the shaft center from the other end of the conventional shaft member, and even if the shaft center is slightly deviated, it is sealed in the device. The main purpose is to enable accurate press-fitting by automatically correcting the posture of the material. The sealing material press-fitting device of the present invention is intended for an annular sealing material that is press-fitted into an opening of a housing through which a shaft member such as an output shaft of a vehicle transmission is inserted, and is separated from the shaft member. The effect is particularly remarkable in the provided sealing material.

  The sealing material press-fitting device of the present invention can be composed of a main body, a piston, a universal engagement portion, a pressing portion, a driving means, and a plurality of arm members. The main body forms a casing of the press-fitting device, forms a cylinder inside as a substantially cylindrical shape that opens at one end, and can be formed so that a piston, which will be described later, can reciprocate in the axial direction. In addition, the handle | steering-wheel for a movement, a hanging jig | tool, etc. can be provided in a main body, and the convenience of handling can be aimed at. The piston is disposed in the cylinder, and can be formed so as to perform a press-fitting operation by moving to the opening side.

  The universal engagement portion is formed to engage with one end of the piston so as to be axially movable and tiltable. The universal engagement portion is a portion that engages the pressing portion and the piston, and can be moved in the axial direction and tilted by, for example, a configuration that moves freely through an elastic body.

  The pressing portion is a portion connected to the opposite side of the universal engaging portion to the piston, and can be configured by a cylindrical portion and a surface matching member. The cylindrical portion can be formed so that the shaft member is inserted and accommodated in the inner periphery to protect the seal material, and the seal material is arranged coaxially with the shaft member. The inner diameter of the cylindrical portion can be made slightly larger than the outer diameter of the shaft member so that the shaft member can be fitted. Further, the shaft member can be easily inserted by chamfering or tapering the inlet of the cylindrical portion. The outer diameter of the cylindrical portion can be made substantially the same as the inner diameter of the sealing material so that the sealing material can be held.

  The surface matching member is provided on the outer peripheral side of the cylindrical portion, and can be formed in an annular shape so as to hold the sealing material on the inner periphery. Further, it can be formed so as to be biased and relatively displaced in the axial direction so as to come into contact with the opening. By the surface matching member, the entire surface of the opening can be contacted and the surface orthogonal to the shaft center can be determined, and the sealing material can be directly opposed and press-fitted uniformly. As the surface matching member, an annular member corresponding to the size of the opening can be used, and an urging means such as a spring can be used.

  The drive means can drive the piston and can be applied regardless of the system as long as it can generate an operation force necessary for press-fitting. In order to perform a reliable press-fitting operation, it is possible to use an electric operation device or a pressure operation device that is stable and easy to control.

  The plurality of arm members are members that attach the entire assembly device to the housing by gripping the outside of the opening. For example, the arm members can be arranged on the outer periphery of the main body at equal intervals, and a mechanism can be provided so that all the arm members are interlocked.

  The universal engagement part is divided into two parts, the pressing part side and the piston side, and the pressing surface between them is formed by a spherical convex part and a concave part that fit together, and the pressing part It is preferable that pressing is possible even if the axis of the piston and the axis of the piston have an angle.

  One of the pressing surfaces between the two portions of the pressing portion side and the piston side can be fitted with a spherical convex portion and the other as a spherical concave portion. Then, even if the axial centers of the two do not completely coincide and have an angle, the convex portion and the concave portion are relatively rotationally displaced and the fitting is maintained. It can be performed.

  The housing may have a recess in the outer periphery of the opening, and the arm member may have a claw that is inserted into the recess when the tip is closed. The press-fitting device can be firmly fixed by providing a claw portion on the arm member and inserting it into the recess of the housing.

  It is preferable that the housing has a reference surface that comes into contact with the surface alignment member, and the reference surface is finished by cutting. By providing a reference surface with high surface accuracy by cutting, the press-fitting operation can be performed with high accuracy.

  The housing may be a rear housing of an automatic transmission, and the seal material may be an oil seal that seals lubricating oil. The present invention is suitable for press-fitting an oil seal used in an automatic transmission for a vehicle.

  Next, the usage method and operation of the sealing material press-fitting device of the present invention configured as described above will be described. First, a sealing material is set in the cylinder part of a press part. Next, the press-fitting device is arranged toward the opening of the housing, and the arm member is rotated to grip the outside of the opening. The entire press-fitting device is attached to the housing by gripping. Since the housing of a vehicle transmission is usually cast, the machining accuracy is low even if the outer surface of the housing is axisymmetric. Therefore, the assembling apparatus is not always attached directly in front of the shaft member. However, in the present invention, there is no problem even if the assembling apparatus and the shaft center of the shaft member are in an inclined mounting state having a slight angle, and it is only necessary that the assembling apparatus is mounted without looseness.

  Subsequently, when the piston is further driven by the driving means, the pressing portion is pressed and advances toward the shaft member. At this time, even in the above-described inclined mounting state, the pressing portion can smoothly advance by the action of the universal engaging portion and the spherical pressing surface. And if the front-end | tip of a shaft member is inserted in a cylinder part, after that, it will be guided by the shaft member and a press part will advance. When the surface alignment member that moves forward together with the cylindrical portion reaches the opening, it is brought into contact with the entire circumferential surface, so that it is corrected to a posture orthogonal to the axis. The pressing portion further driven by the piston can reach the predetermined position in the correct posture at the end while being corrected by the reaction force of the urging means that presses the surface matching member, and can be assembled by press-fitting the sealing material. .

  As described above, according to the present invention, even if the press-fitting device is attached with a slight inclination, the posture of the sealing material can be corrected in the device and the press-fitting can be accurately performed. Further, since the posture of the sealing material is automatically corrected, manual operation is easy.

  Hereinafter, a mode in which the reliability of the press-fitting work is further improved will be described.

  A detection hole that opens on at least one of a surface on which the pressing portion presses the sealing material and a surface on which the surface alignment member abuts on the opening, and pressurized gas is supplied into the detection hole Pressurizing means for detecting the pressure drop in the detection hole, and determining means for determining an abnormality.

  The purpose of providing the detection hole is to confirm the set state of the sealing material and to confirm the close contact state with the periphery of the opening. The detection holes can be provided on at least one surface, but are preferably provided on both. Furthermore, from the viewpoint of reliability, it is preferable to provide a plurality of each surface. The pressurizing means is means for supplying pressurized gas such as compressed air to each detection hole, and can be configured by combining piping, pressure adjusting means, and valves. The determination means is means for detecting a pressure drop in the detection hole and determining that it is abnormal. For example, a pressure sensor or a pressure switch can be applied. In addition, the determination means can be provided separately for the pressing portion and for the face-matching member, and can be determined individually.

  In the aspect in which the detection hole is provided in the pressing portion, when the back surface of the sealing material with unevenness is set, the pressurized gas leaks and the pressure decreases, so that it can be determined as abnormal. In the aspect which provided the detection hole in the surface matching member, it can determine with abnormality, when not closely_contact | adhering with the perimeter of an opening part.

  It is preferable that the pressurizing unit is a pressurized gas supply device and is also used as the driving unit. As the pressurizing means, for example, a dedicated means such as a compression pump can be used, but it is preferable to use a pressurized gas supply device shared by the entire line in a transmission manufacturing line or the like. Further, the shared pressurized gas supply device can also be used as the driving means, that is, the piston can be driven by the gas pressure, whereby the rationalization of the manufacturing equipment can be realized.

  The determination means may prohibit the driving of the piston when it is determined to be abnormal. An interlock means for prohibiting the drive of the piston can be provided in case an abnormality occurs. Furthermore, alarm means for reporting an abnormality to the worker can be provided.

  The sealing material is an oil seal having a recess extending over the entire circumference on one surface side facing the axial direction, and an inner circumferential side being a lip portion that maintains oil tightness, and is inserted into the inner circumference of the pressing portion in the axial direction. An operation member that can be displaced, and an annular insertion recess that is disposed coaxially with the operation member and is axially displaceable so that the tip abuts against the face-matching member and the oil seal can be fitted to the inner periphery of the tip And a holding member having a knock pin that is erected on the bottom of the fitting recess and is received in the recess of the oil seal, and a slide member that is driven in the distal direction by the operation member to push out the oil seal. A setting jig may be provided.

  You may make it provide the setting jig | tool for setting the sealing material from the front end side of a press part for the oil seal which has the recessed part over the perimeter on the one surface side, and the inner peripheral side becomes a lip | rip part. By inserting the operation member of the setting jig into the cylindrical portion instead of the shaft member, the axis of the setting jig and the press-fitting device can be aligned. The holding member can be formed so that the distal end abuts the surface-matching member of the press-fitting device on the entire circumference and holds the sealing material in the fitting recess on the inner periphery of the distal end. By the holding member, the sealing member can be directly opposed to the holding member on the pressing portion side in a stable posture. Furthermore, the knock pin erected on the bottom of the insertion recess is accommodated in the recess of the oil seal, so that the front and rear directions of the oil seal can be prevented from being mistaken. The slide member pushes out the oil seal and is set on the pressing portion.

  By using the setting jig, it is possible to prevent the lip portion of the oil seal from touching the operator and the press-fitting device, and it is possible to confirm the front and back of the sealing material, which is effective in maintaining the quality.

  In the press-fitting device for the sealing material of the present invention, the press-fitting is provided because the surface alignment member for holding the sealing material and the pressing portion to be pressed are engaged with the press-fitting device main body so as to be axially movable and tiltable. Even if the device is mounted with a slight inclination, the posture of the sealing material can be automatically corrected in the device and accurately press-fitted. Further, since the posture of the sealing material is automatically corrected, the manual operation is simple, and the manufacturing facility is simpler and less expensive than the conventional one.

  In addition, an aspect in which a detection hole, a pressurizing means, and a determination means are provided to detect an abnormal setting of the seal member and an adhesion abnormality to the opening, and an aspect in which the setting jig is provided can improve the reliability of press-fitting work and maintain quality. It is effective.

  The best mode for carrying out the present invention will be described with reference to FIGS. 1A and 1B are views for explaining an automatic transmission for a vehicle to which an oil seal is assembled. FIG. 1A is a side cross-sectional view of the entire automatic transmission, and FIG. 1B is a detailed enlarged view near an opening. As shown in FIG. 1A, the housing 91 of the automatic transmission 9 is placed on a pallet 99 on a conveyor (not shown). Although the transmission gear portion in the housing 91 is not shown, the right end in the drawing is an opening 92. The entire circumference of the opening 92 is finished by cutting and can be used as a reference surface. An output shaft 93 is already assembled to the axial center of the opening 92. Further, a shipping cap 95 is temporarily provided outside the opening 92 as a temporary structure during assembly and transportation. Then, as shown in FIG. 1B, the oil seal S that is a sealing material is assembled to the stepped portion 94 on the inner peripheral surface of the opening 92. The lip portion L of the inner peripheral portion of the oil seal S is separated from the output shaft 93 and is in sliding contact with a propeller shaft or a center differential input shaft that is spline-fitted outside the output shaft 93 in a later process. Has the role of maintaining oil tightness. Moreover, the recessed part between the ribs formed in the outer periphery of the housing 91 is utilized as the clamped part 96 as described later.

  The press-fitting device according to the embodiment of the present invention is for assembling an oil seal S, FIG. 2 is a side sectional view, and FIG. 3 is a rear view as viewed from the right side of FIG. The press-fitting device 1 according to the embodiment includes a main body 2, three arm members 3, a pressing portion 4, a face-matching member 5, a piston 6, a compressed air supply device 7, a determination unit having a reference sign, and a set. And a jig 8.

  As shown in FIG. 2, the main body 2 has a substantially cylindrical shape in which a plurality of members are coupled by a fastening member such as a bolt, and a cylinder 21 opened at one end on the left side in the figure is formed inside. ing. Further, a pressurizing hole 22 communicating with the other end on the right side of the cylinder 21 is formed and connected to the compressed air supply device via a pipe. Further, a handle 23 for lifting the press-fitting device 1 is provided to facilitate handling.

  The three arm members 3 are formed of rod-like members, and are arranged at intervals of approximately 120 ° on the outer peripheral edge of the main body 2 as shown in FIG. As shown in FIG. 2, one end of the arm member 3 is bent inward to form a claw portion 31, and the other end side partially protrudes inward to form a locking portion 32. The pivot 33 is pivotally supported. A spring 34 held by the main body 2 is disposed between the claw portion 31 and the pivotal support portion 33. The spring 34 urges the arm member 3 toward the outside to be in a released state shown in FIG. . On the other hand, an annular locking ring 35 that is engaged with and disengaged from the locking portion 32 by moving in the axial direction is disposed on the outer periphery of the main body 2. Then, when the locking ring 35 is locked inside the locking portion 32 by the operation knob 36 of FIG. 3, the locking portions 32 of the three arm members 3 are simultaneously driven to the outside simultaneously. By this action, the claw portion 31 swings and closes inward, and the sandwiched portion 96 of the housing 91 is sandwiched as shown in FIG.

  As shown in FIG. 2, the pressing portion 4 is disposed on the left side of the main body 2 in the drawing, and is formed of a cylindrical portion 41 and an engaging member 42. The inner diameter of the cylindrical portion 41 is slightly larger than the outer diameter of the output shaft 93, has a chamfered portion 43, and opens on the left side in the figure. The outer diameter of the cylinder portion 41 is set so as not to touch the lip portion L inside the oil seal S, and the oil seal S is set from the left side. Further, a seal holding portion 44 that protrudes like a bowl is formed in the middle of the cylinder portion 41 in the axial direction, so that the oil seal S is stably held and press-fitted. The engaging member 42 is formed integrally with the cylindrical portion 41, and a spherical concave portion 49 is formed at the axial center of the right end surface. The engaging member 42 is engaged with the main body 2 by a plurality of floating engaging portions 45 so as to be axially movable and tiltable.

  FIG. 4 is a plan partial sectional view for explaining the details of the floating engagement portion 45. As shown in the figure, the floating engagement portion 45 includes an engagement hole 25 provided on the main body 2 side, an engagement pin 46 that is erected on the engagement member 42 and engages with the engagement hole 25, And a coil spring 47 surrounding the mating pin 46. More specifically, the engagement hole 25 is formed from the left end face of the main body 2 toward the right, and the left inlet in the figure has a small diameter and the right back has a large diameter. The engaging pin 46 includes a head 461 and a shaft 462. The head 461 has a medium diameter and is disposed at the back of the engaging hole 25. The shaft 462 protrudes leftward from the engaging hole 25 with a minimum diameter. The engagement member 42 is screwed. The coil spring 47 is inserted between the entrance of the engagement hole 25 and the head 461 of the engagement pin 46 so as to surround the shaft portion 462. The engagement pin 46 is urged to the right in the figure by the coil spring 47. However, when a load exceeding the urging force is applied in the left direction, the engagement pin 46 moves in the engagement hole 25 in the axial direction. Move relative. Therefore, the engaging member 42 and the entire pressing portion 4 are also relatively moved in the axial direction. Note that the floating engagement portions 45 are provided at a plurality of locations in the circumferential direction, and the pressing portion 4 tilts with respect to the main body 2 when the relative movement amount of each of the floating engagement portions 45 changes.

  As shown in FIG. 2, the surface matching member 5 is formed of an annular member disposed on the outer periphery of the seal holding portion 44 of the pressing portion 4. The left side of the face-matching member 5 protrudes to the left by the thickness of the sealing material S from the seal holding portion 44 and the left end is an annular contact surface 51. The contact surface 51 comes into contact with the opening 92 of the housing 91 when the pressing portion 4 advances to the left. The inner periphery on the right side of the surface matching member 5 is held by the cylinder portion 41 so as to be movable in the axial direction. Furthermore, a plurality of coil springs 53 are disposed between the right end 52 of the surface matching member 5 and the engaging member 42, and the surface matching member 5 is biased toward the left.

  The piston 6 is disposed in the cylinder 21 of the main body 2 and is slidable in the axial direction. A coil spring 61 is disposed on the left side of the cylinder 21 so as to surround the piston 6, and the coil spring 61 biases the piston 6 to the right. The tip of the left side of the piston 6 is finished in a spherical shape to form a convex portion 62, which protrudes from the main body 2 and presses the concave portion 49 of the engaging member 42 of the pressing portion 4.

  The compressed air supply device (not shown in FIG. 2) corresponds to a driving means. The compressed air is supplied to the cylinder 21 from the pressurizing hole 22 of the main body 2 to compress the coil spring 61, and the piston 6 is moved to the left. And the piston 6 can be returned to the right by discharging the compressed air.

  Next, the compressed air supply device 7 and the determination unit will be described with reference to FIG. FIG. 5 is a compressed air system diagram for explaining the compressed air supply device and the determination means used in the press-fitting device 1 of the embodiment. The compressed air supply device 7 shown in the figure is a facility shared by the entire production line, and supplies compressed air by using both a driving means and a pressurizing means. The compressed air is branched into three systems by piping, the first system 71 is used as driving means, and the second system 72 and the third system 73 are used as pressurizing means.

  The first system 71 is connected to a booster 74 via a valve or a check valve, and compressed air pressurized by the cross-sectional area ratio of the booster 74 is supplied to the pressurizing hole 22 of the main body 2. . In addition, FIG. 5 has shown the outline | summary and instruments, such as a pressure change switch and a protective device which are not shown in figure, are actually used.

  In the second system 72, the pressure is adjusted by the pressure reducing valve 75, and compressed air is supplied to the detection hole 76 of the pressing portion 4 and pressurized. Further, a pressure switch 77 and a pressure gauge 78 are provided as determination means for detecting the pressure in the detection hole 76 and determining that it is abnormal. Here, a plurality of detection holes 76 of the pressing part 4 are provided, and are open to the surface of the seal holding part 44 that holds the oil seal. Therefore, if the set oil seal S is normally held, the amount of compressed air leaking from the detection hole 73 is small. However, the oil seal S has front and back surfaces as shown in FIG. 1B, and the leakage amount becomes excessive when held on the back surface with dents. Therefore, it can be determined as abnormal by detecting the pressure drop of the pressure switch 77 or checking the pressure value by the pressure gauge 78. In addition, when the oil seal S is a defective product or is set in a tilted or floating state, it can be determined that there is an abnormality.

  The same applies to the third system 73, and the compressed air whose pressure is adjusted by the pressure reducing valve 75 is supplied to the detection hole 76 of the surface matching member 5 and pressurized. A plurality of detection holes 76 of the surface matching member 5 are also provided and open to the contact surface 51. Therefore, when the pressing portion 4 is advanced to bring the contact surface 51 into contact with the opening 92, the amount of leakage of compressed air is small if it is in good contact with the entire circumference. However, when contact is made in an inclined state, leakage from a part of the detection holes 76 becomes significant, and it can be determined that there is an abnormality. In the present embodiment, the abnormality detection signal of the pressure switch 77 is used in the interlock mechanism, and the piston 6 cannot be driven when an abnormality occurs.

  Next, the setting jig will be described with reference to FIG. 6A and 6B are views for explaining a setting jig for setting the oil seal S in the press-fitting device 1, wherein FIG. 6A is a side sectional view of the setting jig, and FIG. 6B is a cam groove formed in the jig body. It is explanatory drawing of. The press-fitting device 1 is indicated by a one-dot chain line in the drawing. The set jig 8 includes a jig body 81, a slide member 84, and an operation member 85, and the jig body 81 includes a holding portion 82 and a fitting portion 83.

  The holding portion 82 of the jig body 81 is formed of a substantially cylindrical member, and the right end 821 in the drawing contacts the contact surface 51 of the surface matching member 5 and the oil seal S is inserted into the insertion recess 822 on the inner periphery of the right end. It has come to be. Furthermore, the knock pin 823 erected in the right direction in the drawing from the bottom of the insertion recess 822 is accommodated in the recess of the oil seal S so that the front and rear directions are not mistaken. The fitting part 83 of the jig body 81 is formed by an inner cylinder part 831 inserted into the inner periphery of the cylinder part 41, and a flange part 832 that couples the inner cylinder part 831 and the holding part 82. A cam groove 833 is formed in the inner cylinder portion 831 as shown in FIG. The cam groove 833 includes a switching groove 834 extending in the circumferential direction, a moving groove 835 extending short from the upper end of the switching groove 834 to the right in the figure, and a right side in the figure from the lower end of the switching groove 834. And a set groove 836 extending long.

  The slide member 84 is formed by a plurality of slide rods 841 that pass through the flange portion 832 so as to be movable, and an annular pressing plate 843 provided in common at the left end of the slide rod 841. The right end of the slide rod 841 is radially expanded in the shape of a flange to form an extruded portion 845, and the extruded portion 845 directly contacts the sealing material S and has a role of pushing out in the right direction in the figure. In the center of the pressing plate 843, an operation member 85 (described later) penetrates, and a hole groove 847 cut out only in the vertical direction in the drawing is formed. A coil spring 844 is inserted between the pressing plate 843 and the flange portion 832.

  A shaft-shaped member having a step is used as the operation member 85, and the fitting portion 852 to be fitted into the cylindrical portion 41 of the pressing portion 4 and the cam groove 833 of the inner cylindrical portion 831 in this order from the right end 851 side in the drawing. A cam follower 853 to be guided, a knock pin 854 that passes through the hole groove 847 of the slide member 84 only at a predetermined phase angle, a pressing flange 855 that presses the pressing plate 843, and a handle 856 that the operator holds. The cam follower 853 is arranged in the set groove 836 at a phase angle at which the knock pin 854 passes through the hole groove 847.

  FIG. 6A shows a state in which the oil seal S has been attached to the setting jig 8 and is fitted into the press-fitting device 1. This state is a state where the knock pin 854 is aligned with the hole groove 847 and the handle 856 is pushed halfway. Subsequently, when the handle 856 is pushed rightward, the cam follower 853 advances in the set groove 836, the pressing flange 855 pushes the pressing plate 843, the coil spring 844 contracts, and the tip 851 of the operating member 85 is moved to the cylindrical portion 41. The push-out portion 845 presses the oil seal S, and the oil seal S is set on the seal holding portion 44. Further, when the handle 855 is pulled leftward from the state of FIG. 6A, the fitting portion 852 is retracted to the position Z in the drawing, and a new oil seal S can be attached.

  By using the setting jig 8, the lip portion L on the inner peripheral side of the oil seal S can be fitted without touching anywhere, and the quality is reliably maintained.

  Next, an operation method of the press-fitting device 1 of the embodiment will be described with reference to FIG. First, the oil seal S is set on the seal holding portion 44 of the pressing portion 4 by the setting jig 8 described above. At this time, it is confirmed by the pressure switch 77 that no abnormality has occurred. Next, the press-fitting device 1 is brought close to the housing 91, and the operation knob 36 is operated so that the claw portion 31 of the arm member 3 comes to the constricted portion 95 of the housing 91 and is clamped. FIG. 7 shows the state at this time. Next, if the piston 6 is driven, the oil seal S is automatically press-fitted thereafter. If the adhesion between the surface matching member 5 and the opening 92 is not good, it is detected by the pressure switch 77 and the press-fitting operation is interrupted.

  The assembling apparatus 1 according to the embodiment is easy to operate, small, light and inexpensive. On the other hand, conventionally, as shown in FIG. 1A, the housing 91 is fixed by the mounting surface 98 opposite to the opening 92, and the press-fitting operation is performed with the axis 97 on the opposite side as a reference. It was. Therefore, the conventional assembly equipment is large and expensive, and the effect of the present invention is remarkable.

It is a figure explaining the automatic transmission for vehicles by which an oil seal is assembled | attached, (A) is side sectional drawing of the whole automatic transmission, (B) is the detailed enlarged view near opening part. It is side surface fragmentary sectional drawing explaining the press injection apparatus of the Example of this invention. It is the rear view which looked at the Example of FIG. 2 from the right side. FIG. 3 is a partial plan view of a plane for explaining details of the floating engagement portion in the embodiment of FIG. 2. It is a compressed air system diagram explaining the compressed air supply apparatus and determination means used for the Example of FIG. It is a figure explaining the setting jig | tool used for the Example of FIG. 2, (A) is side surface sectional drawing of a setting jig, (B) is explanatory drawing of the cam groove formed in the jig | tool main body. It is a figure explaining the operating method of the press injection apparatus of the Example of FIG. 2, and the state which the arm member clamped the housing is shown.

Explanation of symbols

1: Press-fitting device 2: Body
21: Cylinder 22: Pressurizing hole 23: Handle 3: Arm member
31: Claw part 32: Locking part 33: Pivot part
34: Spring 35: Locking ring 36: Operation knob 4: Pressing part
41: Tube portion 42: Engaging member 43: Chamfered portion
44: Seal holding part 45: Floating engagement part 49: Recessed part 5: Surface matching member
51: Contact surface 53: Coil spring 6: Piston
61: Coil spring 62: Convex part 7: Compressed air supply device
71: 1st system 72: 2nd system 73: 3rd system
74: Booster 75: Pressure reducing valve 76: Detection hole
77: Pressure switch 78: Pressure gauge 8: Set jig
81: Jig body 82: Holding part 83: Fitting part
84: Slide member 85: Operation member 9: Automatic transmission
91: Housing 92: Opening 93: Output shaft
94: Stepped portion 95: Shipping cap 96: Clamped portion
97: shaft center 98: mounting surface 99: pallet S: oil seal L: lip

Claims (9)

A press-fitting device for assembling an annular sealing material in an opening of a housing through which a shaft member is inserted,
A body having a cylinder opening at one end;
A piston disposed in the cylinder and moving toward the opening;
A free engagement portion engaged with one end of the piston so as to be axially movable and tiltable;
A pressing portion connected to the opposite side of the universal engagement portion from the piston;
Drive means for driving the piston;
A plurality of arm members pivotally supported by the body so as to rotate so that the tip is opened and closed, the tip is closed and grips the outside of the opening, and the tip is opened to release the opening. ,
The pressing portion is further
A cylindrical portion that inserts and accommodates the shaft member on the inner periphery to protect the seal material and arrange the seal material coaxially with the shaft member;
A surface-matching member provided on the outer peripheral side of the cylindrical portion, holding a sealing material in an annular shape on the inner periphery, biased and relatively displaced in the axial direction, and abutting against the opening;
A press-fitting device for sealing material, comprising:   The universal engagement part is divided into two parts, the pressing part side and the piston side, and the pressing surface between them is formed by a spherical convex part and a concave part that fit together, and the pressing part 2. The press-fitting device for a sealing material according to claim 1, which can be pressed even if the shaft center of the piston and the shaft center of the piston have an angle.   The sealing material according to claim 1, wherein the housing has a recess in an outer peripheral portion of the opening, and the arm member has a claw portion that is inserted into the recess when the tip is closed. Press-fitting device.   The press-fitting device for a sealing material according to any one of claims 1 to 3, wherein the housing has a reference surface that comes into contact with the surface alignment member, and the reference surface is finished by cutting.   The seal housing press-fitting device according to claim 1, wherein the housing is a rear housing of an automatic transmission, and the seal material is an oil seal that seals lubricating oil.   A detection hole that opens on at least one of a surface on which the pressing portion presses the sealing material and a surface on which the surface alignment member abuts on the opening, and pressurized gas is supplied into the detection hole A press-fitting device for a sealing material according to any one of claims 1 to 5, further comprising a pressurizing unit that performs a determination and a determination unit that detects a pressure drop in the detection hole and determines that the pressure is abnormal.   7. The press-fitting device for a sealing material according to claim 6, wherein the pressurizing means is a pressurized gas supply device that is also used as the driving means.   The sealing material press-fitting device according to claim 6, wherein the determination unit prohibits the driving of the piston when it is determined as abnormal.   The sealing material is an oil seal having a recess extending over the entire circumference on one surface side facing the axial direction, and an inner circumferential side being a lip portion that maintains oil tightness, and is inserted into the inner circumference of the pressing portion in the axial direction. An operation member that can be displaced, and an annular insertion recess that is disposed coaxially with the operation member and is axially displaceable so that the tip abuts against the face-matching member and the oil seal can be fitted to the inner periphery of the tip And a holding member having a knock pin that is erected on the bottom of the fitting recess and is received in the recess of the oil seal, and a slide member that is driven in the distal direction by the operation member to push out the oil seal. The sealing material press-fitting device according to claim 1, further comprising a setting jig.

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