JP2006212757A - Snap ring installing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a snap ring installing device capable of manually installing a snap ring for reducing cost and saving space. <P>SOLUTION: This snap ring installing device installs the snap ring 18 in an inner peripheral groove 13 of a case 1a of an automatic transmission. This snap ring installing device has a graspable body part 30, a case locking part 80 connected to the body part 30 and locked on the case 1a for forming the inner peripheral groove 13 for installing the snap ring 18, a snap ring holding part 50 capable of holding the diametrally contracted snap ring 18, a snap ring pressing part 40 composed of a shaft shape having a pressing end surface on one end side for pressing the snap ring 18 held by the snap ring holding part 50 and movably supported in the shaft direction in the body part 30, and an operation part 60 connected to the body part 30 and the snap ring pressing part 40 and moving the snap ring pressing part 40 to the body part 30 in the shaft direction so as to approach the inner peripheral groove 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a snap ring assembling apparatus.

Conventionally, there are various snap ring insertion devices. For example, there is a manual tool that holds a state in which the outer diameter is reduced by grasping a hole formed in the end of the C ring and grasping the tool. Further, for example, there is a snap ring assembling device disclosed in Japanese Patent Laid-Open No. 2001-138144. This snap ring assembling device is a device that inserts and mounts the snap ring in the inner circumferential groove by pressing the snap ring in the axial direction by the pressing shaft body. And the said snap ring assembly | attachment apparatus is equipped with the raising / lowering apparatus in order to move a press shaft body to an axial direction.
JP 2001-138144 A

  By the way, for example, it may be necessary to mount the snap ring in the inner circumferential groove while pressing it in the axial direction. In such a case, with the above-described manual tool, the snap ring cannot be mounted while being pressed in the axial direction. On the other hand, according to the snap ring assembling apparatus disclosed in Patent Document 1, the snap ring can be easily mounted in the inner circumferential groove. Thus, in order to mount the snap ring in the inner circumferential groove while pressing in the axial direction, a snap ring assembling apparatus described in Patent Document 1 or the like had to be used. However, since a large device such as a lifting device is required, the cost is increased. Furthermore, a space for arranging such a large snap ring assembling apparatus is also required.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a snap ring assembling apparatus capable of manually assembling a snap ring in order to reduce cost and save space. And

Means for Solving the Problems and Effects of the Invention

  The snap ring assembling apparatus of the present invention is fixedly disposed on a mountable member or a mounted member that is connected to the grippable main body and the inner peripheral groove that is connected to the main body and is mounted with the snap ring. A locking portion that is locked to the fixed member, a snap ring holding portion that can hold the snap ring having a reduced diameter, and a pressing end surface that presses the snap ring held by the snap ring holding portion on one end side A pressing portion that is supported by the main body portion so as to be movable in the axial direction, and is connected to the main body portion and the pressing portion, and the pressing portion approaches the inner circumferential groove with respect to the main body portion. And an operation unit that moves in the axial direction.

  When the snap ring is mounted in the inner circumferential groove of the mounted member, the snap ring is reduced in diameter in advance and held in the snap ring holding portion. At this time, the snap ring may be brought into contact with the pressing end surface of the pressing portion, or may have a gap between the snap ring and the pressing end surface of the pressing portion. Then, the locking portion is locked to the mounted member or the fixing member. That is, the snap ring assembling device itself is fixed to the mounted member. Thereafter, the operator manually operates the operation unit to move the pressing unit to the inner circumferential groove side. Then, with the movement of the pressing portion, the snap ring moves to the inner circumferential groove side of the mounted member and is mounted. At this time, even if a large reaction force acts on the snap ring assembly device, the reaction force can be received by the locking portion. That is, even when the reaction force acts, the operator can mount the snap ring in the inner circumferential groove of the mounted member while pressing the snap ring in the axial direction only by manually operating the operation unit. .

  As described above, the snap ring assembling apparatus of the present invention is an apparatus capable of manually assembling the snap ring. Therefore, compared with the snap ring assembling apparatus disclosed in Patent Document 1 or the like, the cost can be greatly reduced. Can be planned. Furthermore, since the snap ring assembling apparatus of the present invention is large enough to be operated manually, it can be carried. That is, the size can be significantly reduced as compared with the conventional snap ring assembling apparatus, and an arrangement space dedicated to the snap ring assembling apparatus becomes unnecessary. As described above, in addition to mounting the snap ring in the inner circumferential groove of the mounted member while pressing the snap ring in the axial direction, the present invention is also applicable to the case where it is not necessary to press the snap ring in the axial direction. It goes without saying that the snap ring assembling apparatus can be applied.

  In addition, the snap ring holding portion has a substantially cylindrical shape that comes into contact with the opening end surface of the mounted member, the pressing end surface is circular, and the outer diameter of the pressing end surface is larger than the inner diameter of the snap ring holding portion. The pressing portion may be small and supported on the inner peripheral side of the snap ring holding portion so as to be relatively movable in the axial direction.

  The inner diameter of the snap ring holding part may be smaller than the diameter of the opening hole of the mounted member into which the snap ring is introduced. That is, when the snap ring moves from the snap ring holding portion to the inner peripheral side of the mounted member, the snap ring acts in the direction of expanding the diameter. Thereby, a snap ring can be easily introduced into the opening hole of the mounted member. Therefore, workability is improved.

  Moreover, it is good for the one end surface which can contact | abut to the opening end surface of the said to-be-attached member among the said snap ring holding | maintenance parts that the inner diameter side protrudes in the axial direction outward from the outer diameter side. For example, when one end face of the snap ring holding portion and the opening end face of the attached member are both planes perpendicular to the axial direction, in some cases, one end face of the snap ring holding portion and the opening end face of the attached member There is a possibility that the snap ring is caught in a short period of time, and the snap ring cannot be mounted in the inner circumferential groove. However, the snap ring can be reliably introduced from the snap ring holding portion to the mounted member by projecting the inner diameter side of the one end surface of the snap ring holding portion axially outward from the outer diameter side. The axially outward direction is the inner circumferential groove side of the mounted member of the snap ring holding portion when the snap ring holding portion is in contact with the opening end surface of the mounted member.

  Moreover, the snap ring assembling apparatus of the present invention may include a locking operation unit that locks the locking portion to the mounted member or the fixing member. By providing the locking operation portion, the locking portion can be easily locked to the mounted member or the fixing member.

  The operation unit may be rotatably connected to the main body unit, and may convert the rotational movement with respect to the main body unit into a linear motion to move the pressing unit in the axial direction. For example, an example of the operation unit is a toggle. A large pressing force can be easily applied by using a mechanism that converts a rotary motion such as a toggle into a linear motion. In other words, even when a large reaction force acts on the snap ring assembly device when the snap ring is mounted in the inner peripheral groove of the mounted member, a pressing force larger than this reaction force is reliably output by an operation unit such as a toggle. can do.

  In addition to the toggle, the operation unit may be configured as follows. For example, the operation portion is supported by the pressing portion so as to be movable in the axial direction, and is engaged with the pressing portion as it is inclined with respect to the pressing portion so that the pressing portion is moved with respect to the main body portion. A driving member that moves in the axial direction, and is supported by the main body so as to be swingable about a substantially orthogonal axis of the pressing portion, and a swinging action point engages with an eccentric position of the driving member to cause the driving member to move. A gripping lever that can be tilted and a lock lever that is swingably supported by the pressing portion and that can lock the axial position of the pressing portion with respect to the main body portion.

  By using such an operation unit, it is possible to easily apply a large pressing force similarly to the toggle. Therefore, even when a large reaction force acts on the snap ring assembly device when the snap ring is mounted in the inner peripheral groove of the mounted member, it is possible to reliably output a pressing force larger than the reaction force. The swinging action point is a point away from the center point of swinging, and is a point that moves in an arc shape when the gripping lever swings.

  Next, the present invention will be described in more detail with reference to embodiments.

(1) Overall Configuration of Automatic Transmission The overall configuration of the automatic transmission according to this embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is an axial sectional view of an embodiment of an automatic transmission. 2 is a cross-sectional view taken along the line AA in FIG. The automatic transmission according to the present embodiment is applied to a front engine / front drive (FF) vehicle or a rear engine / rear drive (RR) vehicle. Further, since the configuration of the automatic transmission is known from, for example, Japanese Patent Laid-Open No. 2000-220704, detailed description is omitted, and only the outline is described here.

  As shown in FIG. 1, in the automatic transmission, the elements of the speed change mechanism are arranged in the cases 1a and 1b on the main shaft X, the counter shaft Y, and the differential shaft Z arranged in parallel with each other. ing. On the main shaft X, a torque converter 2 for inputting engine rotation, a planetary gear G having a speed change element, a reduction planetary gear G1, a first brake B1 for rotationally locking the reduction planetary gear G1, and one element of the planetary gear G are rotated. A second brake B2 to be locked and three clutches C1 to C3 are provided. The planetary gear G and the reduction planetary gear G1 are connected to a counter drive gear 3 that is an output element on the main shaft X.

  A counter gear 4 is disposed on the counter shaft Y. The counter gear 4 includes a counter driven gear 5 that meshes with the counter drive gear 3 and a differential drive pinion gear 6 that is an output element on the counter shaft Y. A differential device 7 is disposed on the differential shaft Z. The differential device 7 includes a differential ring gear 8 that meshes with the differential drive pinion gear 6 and a differential gear 9 that is coupled to drive wheels (not shown).

  Next, the detailed configuration of the first brake B1 and the B1 piston P will be described with reference to FIG. As shown in FIG. 2, the first brake B1 is a band brake, and is disposed on the outer peripheral side of the clutch drum C3 of the speed reduction planetary gear G1. The first brake B1 includes a ring portion B1R having a ring-like shape having a closed end wound substantially doubly, and an engaging portion B1P projecting on the outer peripheral side on one end side of the ring portion B1R. Consists of. The other end side of the ring portion B1R is fixed to the case 1a by a bolt 21. Therefore, when the engaging portion B1P is pressed in the substantially tangential direction of the ring portion B1R, the ring portion B1R acts to reduce the diameter. Thus, when the diameter of the first brake B1 is reduced, the rotation operation of the member on the outer peripheral side of the reduction planetary gear G1 can be stopped.

  The engaging portion B1P of the first brake B1 is pressed in the substantially tangential direction (upward direction in FIG. 2) of the ring portion B1R by the tip end side of the B1 piston P. Here, the B1 piston P is mounted in the bottomed cross-sectional circular hole 11 formed in the case 1a. A circular hole 12 is formed on the bottom surface of the circular hole 11 having a bottomed cross section formed in the case 1a. Further, an inner peripheral groove 13 is formed on the inner peripheral surface near the opening of the bottomed circular hole 11 over the entire circumference.

  The B1 piston P mounted in the bottomed cross-sectional circular hole 11 specifically includes a cylinder 16 fixedly disposed in the case 1a, and a ring portion B1R of the first brake B1 with respect to the cylinder 16. The piston 17 is capable of reciprocating in a substantially tangential direction. The cylinder 16 has a substantially bottomed cylindrical shape, and is arranged so that the opening side faces the bottom surface side of the case 1a. And the lower end surface in FIG. 2 of the bottom face of the cylinder 16 is latched by the snap ring 18 attached to the inner peripheral groove 13 of the case 1a. The piston 17 includes a substantially disk-shaped piston portion 19 that slides on the inner peripheral surface of the cylindrical portion of the cylinder 16, and a rod-shaped piston rod 20 that is fixed to the piston portion 19 in a direction perpendicular to the piston portion 19. The piston portion 19 is pressed to the opening side of the bottomed cross-sectional circular hole 11 of the case 1a by a return spring disposed between the bottom surface of the bottomed cross-sectional circular hole 11 of the case 1a. On the other hand, the piston portion 19 is pressed to the bottom surface side of the bottomed cross-sectional circular hole 11 of the case 1 a by the action of hydraulic oil injected between the bottom surface of the cylinder 16. Further, the piston rod 20 is inserted through the circular hole 12 of the bottomed cross-sectional circular hole 11 of the case 1a and is in contact with the engaging portion B1P of the first brake B1. That is, by adjusting the pressure of the hydraulic oil injected between the piston portion 19 and the bottom surface of the cylinder 16, the piston 17 moves and the first brake B1 rotates the clutch drum C3 with respect to the case 1a. Can be stopped.

(2) Mounted member for mounting a snap ring by the snap ring assembly device of the present invention Next, a mounted member for mounting a snap ring by the snap ring assembly device of the present invention will be described with reference to FIG. . The mounting target of the snap ring assembly device of the present invention is the snap ring 18 mounted in the inner peripheral groove 13 of the bottomed cross-sectional circular hole 11 of the case 1a. That is, the mounted member is the case 1a.

  In order to mount the snap ring 18 to be mounted in the inner circumferential groove 13 of the case 1a, the return spring and the B1 piston P are inserted in advance into the bottomed cross-sectional circular hole 11 of the case 1a, and then the snap ring 18 is mounted. It is introduced into the circular hole 11 with a bottomed cross section and attached to the inner circumferential groove 13. Here, the B1 piston P is subjected to a force to move toward the opening side of the bottomed cross-sectional circular hole 11 of the case 1a by the urging force of the return spring. Therefore, it is necessary to introduce the snap ring 18 into the bottomed cross-sectional circular hole 11 while pressing the B1 piston P toward the bottom surface side of the bottomed circular hole 11 against the urging force of the return spring. .

(3) Snap Ring Assembly Device of First Embodiment (3.1) Configuration of Snap Ring Assembly Device of First Embodiment Next, the configuration of the snap ring assembly device of the first embodiment will be described with reference to FIGS. This will be described with reference to FIG. FIG. 3 is a front view of the snap ring assembling apparatus. FIG. 4 is a plan view of the snap ring assembling apparatus, that is, a view seen from the upper side of FIG. FIG. 5 is a right side view of the snap ring assembling apparatus, that is, a view seen from the right side of FIG. 6 is an axial sectional view of the snap ring assembling apparatus, that is, a BB sectional view of FIG. 7 is a cross-sectional view taken along the line CC of FIG.

  As shown in FIGS. 3 to 7, the snap ring assembling apparatus of the first embodiment includes a main body portion 30, a snap ring pressing shaft 40, a snap ring holding portion 50, a pressing operation portion 60, and a positioning pin. 70, a case locking portion 80, and a locking operation portion 90. Here, for ease of explanation, the right side of FIGS. 3 to 4 and 6 is referred to as the front end side, and the left side of FIGS. 3 to 4 and 6 is referred to as the rear end side. The upper side is referred to as the upper end side, and the lower side in FIGS. 3 and 5 to 6 is referred to as the lower end side.

  The main body 30 is a portion that can be gripped by an operator and is fixedly disposed on the case 1a. The main body 30 includes a main body gripping portion 31 having a substantially cylindrical shape with a C-shaped cross section and an L-shaped fixing portion 32 fixed to the main body gripping portion 31. The main body gripping portion 31 can grip the outer peripheral surface by an operator. Further, a pressing link member 62 described later is interposed in the axial cutout portion 31 a (shown in FIG. 6) of the main body gripping portion 31. A circular hole is formed in the axial center of the main body grip 31.

  The L-shaped fixing part 32 includes an L-shaped plate-like part 33 and a fixed shaft 34. The L-shaped plate portion 33 has an L-shaped cross section, and a first circular hole 33a (shown in FIG. 6) is formed on one flat plate surface. The first circular hole 33 a is slightly larger than the outer diameter of the main body grip portion 31. Further, two second circular holes 33b (shown in FIG. 5) are formed on the other flat plate surface of the L-shaped plate portion 33. A guide rod 82 described later slides in the second circular hole 33b. The fixed shaft 34 has a rod shape, and is fixed to substantially the center of the other flat plate surface of the L-shaped plate portion 33 so as to extend in the vertical direction opposite to the one flat plate surface of the L-shaped plate portion 33. Yes. And the L-shaped fixing | fixed part 32 is being fixed to the front-end side of the main body holding part 31 with the nuts 35 and 36 so that the L-shaped plate-shaped part 33 may become a reverse L-shape.

  The snap ring pressing shaft 40 is supported by the main body gripping portion 31 so as to be relatively movable in the axial direction of the main body gripping portion 31. The snap ring pressing shaft 40 includes a moving shaft portion 41 and a circular pressing plate 42. The moving shaft portion 41 has a substantially cylindrical shape that is substantially the same as the inner diameter of the circular hole at the center of the main body gripping portion 31, and is supported by the circular hole of the main body gripping portion 31 so as to be relatively movable in the axial direction. Further, the moving shaft portion 41 is formed with a notch 41a (shown in FIG. 6) parallel to the axial direction from substantially the center in the axial direction toward the rear end side. A pin 41 b is fixed to the cutout 41 a in the radial direction of the moving shaft portion 41. Further, a concave groove 41d in which a snap ring 41c is disposed on the outer peripheral surface is formed on the front end side of the moving shaft portion 41. The snap ring 41c is engaged with a rear end side surface of a snap ring holding portion 50 described later. The circular pressing plate 42 has a disk shape and is fixed to the front end side of the moving shaft portion 41. The circular pressing plate 42 is larger than the outer diameter of the moving shaft portion 41 and slightly smaller than the inner diameter of the bottomed cross-sectional circular hole 11 of the case 1a. Note that an end surface (pressing end surface) on the front end side of the circular pressing plate 42 is a surface that presses the snap ring 18 to be attached to the snap ring assembling apparatus toward the front end side.

  The snap ring holding portion 50 has a circular cup shape, and a circular hole 50a is formed at the center of the bottom surface. The inner diameter of the circular hole 50a is larger than the outer diameter on the front end side of the moving shaft portion 41 of the snap ring pressing shaft 40 from the position where the snap ring 41c is disposed. The inner diameter of the cup portion of the snap ring holding portion 50 is slightly larger than the outer diameter of the circular pressing plate 42 of the snap ring pressing shaft 40. The inner diameter of the cup portion of the snap ring holding portion 50 is set to a size that allows the snap ring 18 to be mounted to be attached in a reduced state. Further, the inner diameter of the cup portion of the snap ring holding portion 50 is made slightly smaller than the inner diameter of the bottomed cross-sectional circular hole 11 of the case 1a. The axial length of the cup portion of the snap ring holding portion 50 is slightly longer than the thickness of the circular pressing plate 42 of the snap ring pressing shaft 40. Further, the opening end surface of the cup portion of the snap ring holding portion 50 has an inner diameter side protruding from the outer diameter side to the opening side (axially outward). That is, the inner diameter side of the opening end surface of the cup portion of the snap ring holding portion 50 is formed in an acute angle shape.

  The snap ring holding portion 50 having such a shape is arranged such that the opening side of the cup portion faces the front end side from the position where the snap ring 41c is arranged in the moving shaft portion 41 of the snap ring pressing shaft 40. Has been placed. That is, the snap ring holding part 50 is supported by the snap ring pressing shaft 40 so as to be movable in the axial direction.

  The pressing operation unit 60 uses a so-called toggle (bending lever). The pressing operation unit 60 includes a pressing operation arm unit 61 and a pressing link member 62. One end of the pressing operation arm 61 is connected and supported so as to be swingable to the rear end of the circular hole in the axial center of the main body grip 31. The other end side of the pressing operation arm portion 61 is a grip portion that can be operated by an operator. One end side of the pressing link member 62 is connected and supported so as to be swingable near the center of the pressing operation arm portion 61, and the other end side is connected and supported so as to be swingable to a pin 41 b fixed to the moving shaft portion 41. . Therefore, the operator can move the snap ring pressing shaft 40 to the front end side with respect to the main body 30 by swinging the pressing operation arm portion 61 to the front end side.

  As shown in FIG. 7, the positioning pin 70 has a cylindrical shape with one end projecting and having a reduced diameter. The positioning pin 70 is arranged on one flat plate surface of the L-shaped plate portion 33 of the L-shaped fixing portion 32 so as to extend in a direction slightly inclined with respect to the axial direction. The positioning pin 70 can be inserted into a reference hole (not shown) of the case 1a. That is, the positioning pin 70 is used for positioning when the snap ring assembly device is fixed to the case 1a.

  The case locking part 80 is a member for locking to the case 1a. The case locking portion 80 includes a locking plate 81 and a guide bar 82. The locking plate 81 has a substantially flat plate shape having a substantially rectangular protrusion 81a on the upper end side. A guide circular hole 81 b is formed in the center of the locking plate 81. The guide circular hole 81 b is slightly larger than the outer diameter of the fixed shaft 34 of the L-shaped fixed portion 32. The guide circular hole 81b supports the fixed shaft 34 of the L-shaped fixed portion 32 so as to be relatively movable in the axial direction. Further, the locking plate 81 is formed with two fixing circular holes 81c and 81c in addition to the guide circular hole 81b. The inner diameters of the fixing circular holes 81c and 81c are larger than the outer diameter of the head of the bolt 100 (shown in FIGS. 8 to 10 described later). The fixing circular holes 81c and 81c are engaged with a bolt 100 used for connecting and fixing the case 1a and the case 1b. The guide rod 82 has a columnar shape and is supported by the two second circular holes 33b and 33b formed in the L-shaped plate portion 33 so as to be relatively movable in the axial direction. That is, the outer diameter of the guide rod 82 is made smaller than the inner diameter of the second circular holes 33b and 33b. That is, the case locking portion 80 can move relative to the L-shaped fixing portion 32 in the vertical direction. Note that the lower end side of the guide rod 82 is positioned on the positioning pin 70 or the like even when the lower end side surface of the locking plate 81 is in contact with the upper end side surface of the other flat plate surface of the L-shaped plate portion 33. The length is such that it does not contact.

  The locking operation unit 90 uses a so-called toggle (bending lever). The locking operation portion 90 includes a locking operation arm portion 91, a first locking link member 92, and a second locking link member 93. One end side of the locking operation arm portion 91 is a grip portion that can be operated by an operator. One end side of the first locking link member 92 is swingably connected to the other end side of the locking operation arm portion 91, and the other end side swings to the upper end side of the fixed shaft 34 of the L-shaped fixing portion 32. It is movably connected and supported. One end side of the second locking link member 93 is swingably connected to and supported by the other end side of the locking operation arm portion 91, and the other end side of the second locking link member 93 is swingably connected to the protrusion 81 a of the locking plate 81. Has been. Therefore, the operator can move the case locking portion 80 to the lower end side with respect to the L-shaped fixing portion 32 of the main body portion 30 by swinging the locking operation arm portion 91 to the front end side.

(3.2) Operation of Snap Ring Assembly Device of First Embodiment Next, with respect to the mounting operation of the snap ring 18 by the snap ring assembly device of the first embodiment configured as described above, FIGS. The description will be given with reference. FIG. 8 is a view showing a state in which the snap ring assembly device is locked to the case 1a. FIG. 9 is a diagram illustrating a state in which the opening end surface of the snap ring holding portion 50 is in contact with the opening end surface of the bottomed cross-sectional circular hole 11 of the case 1a. FIG. 10 is a view showing a state in which the snap ring 18 to be attached is attached to the inner peripheral groove 13 of the bottomed cross-sectional circular hole 11 of the case 1a. FIG. 11 is a partially enlarged view of FIG.

  First, the snap ring 18 is attached and held in a reduced diameter state on the front end side of the circular pressing plate 42 of the snap ring pressing shaft 40 in the cup portion of the snap ring holding portion 50 of the snap ring assembling apparatus. In this state, the snap ring pressing shaft 40 and the snap ring holding portion 50 are integrated. The end face on the rear end side of the snap ring 18 is in contact with the end face on the front end side of the circular pressing plate 42 of the snap ring pressing shaft 40.

  Further, the B1 piston P is inserted into the bottomed cross-sectional circular hole 11 of the case 1a. However, the B1 piston P is located on the opening side of the bottomed cross-sectional circular hole 11 by the urging force of the return spring. Subsequently, the positioning pin 70 is inserted into a reference hole (not shown) of the case 1a to position the snap ring assembly device with respect to the case 1a. At this time, the axial center of the bottomed cross-sectional circular hole 11 of the case 1a coincides with the axial center of the snap ring pressing shaft 40. Furthermore, the end surface on the front end side of the snap ring 18 held by the snap ring holding portion 50 abuts on the B1 piston P.

  Subsequently, as shown in FIG. 8, the operator grasps the locking operation arm 91 of the locking operation unit 90 and swings the locking operation arm 91 to the front end side. With this operation, the case locking portion 80 moves to the lower end side with respect to the L-shaped fixing portion 32 of the main body 30, and the upper end surface of the L-shaped fixing portion 32 and the lower end of the case locking portion 80 are moved. The side surface comes into contact. At this time, the fixing circular hole 81 c of the locking plate 81 is locked to the bolt 100. That is, the snap ring assembling device is fixed to the case 1a by this operation.

  Subsequently, as shown in FIG. 9, the operator holds the pressing operation arm portion 61 of the pressing operation portion 60 and swings the pressing operation arm portion 61 to the front end side. With this operation, the snap ring pressing shaft 40 and the snap ring holding portion 50 move to the front end side with respect to the main body portion 30. If it does so, the opening end surface of the cup part of the snap ring holding | maintenance part 50 will contact | abut to the opening end surface of the bottomed cross-section circular hole 11 of case 1a. Then, the return spring urging the B1 piston P is compressed, and the B1 piston P also moves to the front end side.

  Subsequently, as shown in FIGS. 10 and 11, when the pressing operation arm portion 61 is further swung to the front end side, the snap ring pressing shaft 40 is moved to the main body portion 30 and the snap ring holding portion 50 by the B1 piston. While pressing P, it moves further to the front end side. If it does so, the snap ring 18 will detach | leave from the snap ring holding | maintenance part 50, and will contact | abut to the internal peripheral surface of the bottomed cross-section circular hole 11 of case 1a. When the snap ring pressing shaft 40 further moves to the front end side, the snap ring 18 reaches the position of the inner peripheral groove 13 formed in the bottomed cross-sectional circular hole 11 of the case 1a. Then, the snap ring 18 is expanded in diameter and engaged with the inner circumferential groove 13 and attached.

  Then, the operation | movement reverse to the operation | movement which mounts the snap ring 18 mentioned above to the inner peripheral groove | channel 13 is performed, and a snap ring assembly apparatus is taken out from the bottomed cross-section circular hole 11 of case 1a.

(4) Snap Ring Assembly Device of Second Embodiment (4.1) Configuration of Snap Ring Assembly Device of Second Embodiment Next, with respect to the configuration of the snap ring assembly device of the second embodiment, FIG. This will be described with reference to FIG. FIG. 12 is a front view of the snap ring assembling apparatus. FIG. 13 is an axial cross-sectional view of the snap ring assembly device.

  As shown in FIGS. 12 and 13, the snap ring assembling apparatus includes a main body portion 130, a snap ring pressing shaft 140, a snap ring holding portion 50, a pressing operation portion 160, a positioning pin 70, and a case engaging member. It comprises a stop portion 80 and a locking operation portion 90. Here, in the snap ring assembling apparatus of the second embodiment, the same components as those of the above-described snap ring assembling apparatus of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The main body 130 is a portion that can be gripped by an operator and is fixedly disposed on the case 1a. The main body 130 includes a barrel portion 131, a grip portion (gripping handle) 132 fixed to the barrel portion 131, and an L-shaped fixing portion 32 fixed to the barrel portion 131.

  The barrel portion 131 has two through holes 131a and 131b that are substantially circular and are coaxially formed. A space 131c larger than the through holes 131a and 131b is formed between the two through holes 131a and 131b. Further, the barrel part 131 is formed with a locking pin 131d for locking a lock lever 163 of a pressing operation part 160 described later. Specifically, the locking pin 131d is formed on the rear side of the barrel portion 131 from the position where the through hole 131b on the rear end side is formed.

  The grip portion 132 is fixed so as to extend in a direction substantially perpendicular to the axial direction of the barrel portion 131, and is a portion that is gripped by an operator. The L-shaped fixing part 32 has the same configuration as the L-shaped fixing part 32 of the first embodiment described above. The L-shaped fixing portion 32 is fixed to the front end side of the barrel portion 131 with nuts 35 and 36.

  The snap ring pressing shaft 140 is supported by the barrel portion 131 so as to be relatively movable in the axial direction of the barrel portion 131. The snap ring pressing shaft 140 includes a moving shaft portion 141 and a circular pressing plate 42. The moving shaft portion 141 has a substantially cylindrical shape substantially the same as the inner diameter of the through hole 131a of the barrel portion 131, and is supported by the through hole 131a of the barrel portion 131 so as to be relatively movable in the axial direction. On the front end side of the moving shaft portion 141, a concave groove 41d in which the snap ring 41c is disposed is formed on the outer peripheral surface. Further, a disk 141 a is fixed to the rear end side of the moving shaft portion 141. The snap ring 41 c is engaged with the rear end side surface of the snap ring holding portion 50. The circular pressing plate 42 has the same configuration as the circular pressing plate 42 of the first embodiment described above, and is fixed to the front end side of the moving shaft portion 141.

  The pressing operation unit 160 includes a drive member 161, a grip lever 162, a lock lever 163, a first spring 164, a second spring 165, and a third spring 166.

  The drive member 161 has a substantially disk shape with a circular hole 161a formed in the center. The circular hole 161 a formed in the drive member 161 is formed slightly larger than the shaft diameter of the snap ring pressing shaft 140 and is inserted and supported on the outer peripheral side of the snap ring pressing shaft 140. That is, the drive member 161 is disposed so as to be movable in the axial direction with respect to the snap ring pressing shaft 140. Further, the drive member 161 is disposed in a space 131 c formed in the barrel part 131. Further, since the circular hole 161 a of the driving member 161 is larger than the shaft diameter of the snap ring pressing shaft 140, the driving member 161 contacts the outer peripheral surface of the snap ring pressing shaft 140 by being inclined with respect to the snap ring pressing shaft 140. To do. Although details will be described later, when the driving member 161 is in contact with the snap ring pressing shaft 140, an axial force acts on the driving member 161, so that the driving member 161 moves the snap ring pressing shaft 140 in the axial direction. be able to.

  The grip lever 162 is fixed to the barrel portion 131 by a fulcrum pin 162a. That is, the grip lever 162 can swing around the substantially orthogonal axis of the snap ring pressing shaft 140 with respect to the main body 130 around the fulcrum pin 162a. The grip lever 162 is disposed on the front side of the grip portion 132, and the operator can grip the grip lever 162 together with the grip portion 132. Further, an action pin (swinging action point) 162b is fixed to the upper end side of the grip lever 162. The action pin 162b is arranged in the space 131c of the barrel portion 131 and on the rear end face side of the drive member 161. Furthermore, the action pin 162b is in contact with a position eccentric from the axis of the circular hole 161a on the rear end surface of the drive member 161. That is, when the lower end side of the grip lever 162 is swung in a direction approaching the grip portion 132, the action pin 162b presses the rear end surface of the drive member 161 toward the front side.

  The lock lever 163 has a substantially plate shape with a circular hole 163a formed in the center. The circular hole 163 a formed in the lock lever 163 is formed slightly larger than the shaft diameter of the snap ring pressing shaft 140 and is inserted and supported on the outer peripheral side of the snap ring pressing shaft 140. That is, the lock lever 163 is disposed so as to be movable in the axial direction with respect to the snap ring pressing shaft 140. The lock lever 163 is disposed on the rear side of the through hole 131b on the rear end side of the barrel portion 131 and on the front side of the locking pin 131d. Further, since the circular hole 163 a of the lock lever 163 is larger than the diameter of the snap ring pressing shaft 140, the lock lever 163 contacts the outer peripheral surface of the snap ring pressing shaft 140 by being inclined with respect to the snap ring pressing shaft 140. To do. Although details will be described later, when the lock lever 163 contacts the snap ring pressing shaft 140, the snap ring pressing shaft 140 acts to prevent the axial movement of the snap ring pressing shaft 140 to the rear side. That is, the lock lever 163 can lock the axial position of the snap ring pressing shaft 140.

  The first spring 164 is disposed on the outer peripheral side of the snap ring pressing shaft 140 such that one end thereof is in contact with the rear end surface of the through hole 131a on the front end side of the barrel portion 131 and the other end is in contact with the driving member 161. Has been. That is, the first spring 164 urges the drive member 161 rearward with respect to the barrel part 131.

  The second spring 165 is on the outer peripheral side of the snap ring pressing shaft 140 and has one end abutting on the rear end surface of the through hole 131b on the rear end side of the barrel portion 131 and the other end abutting on the lock lever 163. Has been placed. That is, the second spring 165 urges the lock lever 163 backward with respect to the barrel part 131.

  The third spring 166 is on the outer peripheral side of the snap ring pressing shaft 140, and one end thereof is in contact with the rear end surface of the barrel part 131, and the other end is in contact with the disk 141 a of the snap ring pressing shaft 140. That is, the third spring 166 urges the snap ring pressing shaft 140 rearward with respect to the barrel portion 131.

(4.2) Operation of Snap Ring Assembly Device of Second Embodiment Next, with respect to the mounting operation of the snap ring 18 by the snap ring assembly device of the second embodiment configured as described above, FIGS. The description will be given with reference. FIG. 14 is a sectional view in the axial direction of the snap ring assembling apparatus, and shows a state where the grip lever 162 is first gripped. FIG. 15 is a sectional view in the axial direction of the snap ring assembling apparatus, and shows a state where the grip lever 162 is released from the state of FIG. FIG. 16 is a cross-sectional view in the axial direction of the snap ring assembling apparatus, and shows a state in which the grip release of the grip lever 162 is repeated a plurality of times. FIG. 17 is a sectional view in the axial direction of the snap ring assembling apparatus, and shows a state in which the lock is released by operating the lock lever 163 from the state of FIG.

  Here, the snap ring assembling apparatus of the second embodiment is mainly different from the snap ring assembling apparatus of the first embodiment in the pressing operation unit 160. That is, the operation of the snap ring assembly device of the second embodiment and the first embodiment is the operation until the snap ring assembly device is fixed to the case 1a by operating the locking operation unit 90 described above. The operation of the other components accompanying the movement of the snap ring pressing shaft 140 forward is the same. Therefore, only the operation of the snap ring pressing shaft 140 accompanying the operation of the pressing operation unit 160 will be described here.

  First, as shown in FIG. 14, when the operator grips the grip lever 162, the lower end side of the grip lever 162 swings in a direction approaching the grip portion 132 (clockwise direction in FIG. 14). Along with this operation, the action pin 162b on the upper end side of the grip lever 162 presses the eccentric position of the rear end surface of the drive member 161 forward. Since the circular hole 161a of the drive member 161 is larger than the shaft diameter of the snap ring pressing shaft 140, immediately after the grip lever 162 swings in the clockwise direction of FIG. Tilt against. As a result, the opening portion of the circular hole 161 a of the driving member 161 contacts the outer peripheral surface of the snap ring pressing shaft 140.

  In this state, when the grip lever 162 further swings in the clockwise direction of FIG. 14, the drive member 161 tends to move forward. At this time, the frictional force between the opening portion of the circular hole 161a of the driving member 161 and the outer peripheral surface of the snap ring pressing shaft 140 resists the biasing force of the third spring 166 and prevents the driving member 161 from moving forward. Accordingly, the snap ring pressing shaft 140 moves forward with respect to the main body 130. Here, due to the first spring 164 that biases the drive member 161 rearward with respect to the barrel portion 131, the frictional force between the opening portion of the circular hole 161a of the drive member 161 and the outer peripheral surface of the snap ring pressing shaft 140 is large. Become. That is, the first spring 164 can surely move the snap ring pressing shaft 140 forward as the drive member 161 moves forward.

  By the way, in the lock lever 163 before the operator holds the grip lever 162, the opening portion of the circular hole 163 a of the lock lever 163 is in contact with the outer peripheral surface of the snap ring pressing shaft 140. When the operator grips the grip lever 162 and the snap ring pressing shaft 140 attempts to move forward, the lock lever 163 swings counterclockwise against the biasing force of the second spring 165. .

  Subsequently, as shown in FIG. 15, when the operator releases the grip lever 162, the pressing force applied to the drive member 161 by the action pin 162b of the grip lever 162 is reduced. Then, the drive member 161 is moved rearward with respect to the barrel portion 131 by the first spring 164 urging the front end surface of the drive member 161. At this time, since the pressing force by the action pin 162b of the grip lever 162 does not act on the rear end surface of the driving member 161, the inclination of the driving member 161 with respect to the snap ring pressing shaft 140 is eliminated. That is, the drive member 161 moves rearward with respect to the snap ring pressing shaft 140 while a part of the inner peripheral surface of the circular hole 161 a of the driving member 161 is in sliding contact with the outer peripheral surface of the snap ring pressing shaft 140. Along with this operation, the lower end side of the grip lever 162 swings in a direction away from the grip portion 132 (counterclockwise direction in FIG. 15).

  At this time, since the pressing force to the front side is not applied to the snap ring pressing shaft 140, the snap ring pressing shaft 140 tends to move rearward with respect to the main body portion 130 by the urging force of the third spring 166. To do. However, when the snap ring pressing shaft 140 tries to move backward with respect to the main body 130, the lock lever 163 is swung clockwise by the action of the second spring 165. Then, the opening portion of the circular hole 163 a of the lock lever 163 comes into contact with the outer peripheral surface of the snap ring pressing shaft 140. That is, the snap ring pressing shaft 140 against the main body 130 against the biasing force of the third spring 166 due to the frictional force between the opening portion of the circular hole 163 a of the lock lever 163 and the outer peripheral surface of the snap ring pressing shaft 140. Stop. That is, the lock lever 163 fixes (locks) the axial position of the snap ring pressing shaft 140 once moved forward with respect to the main body 130.

  Subsequently, by repeatedly gripping and releasing the grip lever 162 a plurality of times, the snap ring pressing shaft 140 gradually moves forward with respect to the main body portion 130, resulting in a state as shown in FIG. Thus, by moving the snap ring pressing shaft 140 forward relative to the main body 130, the snap ring 18 engages with the inner circumferential groove 13 formed in the bottomed cross-sectional circular hole 11 of the case 1a and is mounted. Is done. Note that the amount of movement of the snap ring pressing shaft 140 toward the front side with respect to the main body 130 differs depending on the position of the inner circumferential groove 13 formed in the bottomed cross-sectional circular hole 11 of the case 1a.

  Thereafter, as shown in FIG. 17, the operator presses the lower end side of the lock lever 163 forward. Then, the lock lever 163 is unlocked from the state where the axial position of the snap ring pressing shaft 140 is locked. As a result, the snap ring pressing shaft 140 moves rearward with respect to the main body 130 by the biasing force of the third spring 166. And the operation part 90 for latching is operated and a snap ring assembly apparatus is removed from case 1a.

(5) Others In the present embodiment, the bottomed cross-sectional circular hole 11 of the case 1a in which the B1 piston P of the automatic transmission is mounted as the mounted member, but is not limited thereto. The snap ring assembling apparatus of the present invention can be applied when assembling the snap ring to another member without being limited to the automatic transmission, as long as it does not depart from the present invention.

It is an axial sectional view about one embodiment of an automatic transmission. It is AA sectional drawing of FIG. It is a front view of a snap ring assembly apparatus. FIG. 4 is a plan view of the snap ring assembling apparatus, that is, a view seen from the upper side of FIG. 3. FIG. 4 is a right side view of the snap ring assembling apparatus, that is, a view seen from the right side of FIG. 3. It is an axial sectional view of the snap ring assembling apparatus, that is, a sectional view taken along line BB in FIG. It is CC sectional drawing of FIG. It is a figure which shows the state which latched the snap ring assembly apparatus to case 1a. It is a figure which shows the state which the opening end surface of the snap ring holding | maintenance part 50 contact | abutted to the opening end surface of the bottomed cross-section circular hole 11 of case 1a. It is a figure which shows the state by which the snap ring 18 which is mounting | wearing object was mounted | worn in the inner peripheral groove | channel 13 of the bottomed cross-section circular hole 11 of case 1a. It is the elements on larger scale of FIG. It is a front view of a snap ring assembly apparatus. It is an axial sectional view of a snap ring assembling apparatus. It is an axial direction sectional view of a snap ring assembly device, and is a figure showing the state where gripping lever 162 was grasped first. FIG. 15 is a sectional view in the axial direction of the snap ring assembling apparatus, and shows a state where the grip lever 162 is released from the state of FIG. 14. It is an axial direction sectional view of a snap ring assembly device, and is a figure showing the state where grip release of grip lever 162 was repeated a plurality of times. FIG. 17 is a cross-sectional view in the axial direction of the snap ring assembly device, and shows a state in which the lock is released by operating the lock lever 163 from the state of FIG. 16.

Explanation of symbols

1a, 1b: Case, 2: Torque converter, 3: Counter drive gear, 4: Counter gear, 5: Counter driven gear, 6: Differential drive pinion gear, 7: Differential device, 8: Differential ring gear, 9: Differential gear, 11 : Circular hole with bottom cross section, 12: circular hole, 13: inner circumferential groove, 18: snap ring, 30, 130: main body part, 31: main body gripping part, 32: L-shaped fixing part, 33: L-shaped plate shape 34, fixed shaft, 35, 36: nut, 40, 140: snap ring pressing shaft (pressing portion), 41, 141: moving shaft portion, 42: circular pressing plate, 50: snap ring holding portion, 60, 160 : Pressing operation section (operation section), 61: pressing operation arm section, 62: pressing link member, 70: positioning pin, 80: case locking section 81: Locking plate, 82: Guide bar, 90: Locking operation section (locking operation section), 91: Locking operation arm section, 92: First locking link member, 93: Second locking Link member 131: barrel portion 132: grip portion 161: drive member 162: grip lever 163: lock lever 164-166: spring B1: first brake P: B1 piston

Claims (8)

A grippable body,
A locking part that is connected to the body part and is locked to a mounted member in which an inner circumferential groove for mounting a snap ring is formed or a fixed member that is fixedly disposed on the mounted member;
A snap ring holding portion capable of holding the reduced diameter snap ring;
A pressing portion that has a pressing end surface that presses the snap ring held by the snap ring holding portion on one end side, and is supported by the main body portion so as to be axially movable; and
An operation unit that is connected to the main body part and the pressing part and moves the pressing part in the axial direction so as to approach the inner circumferential groove with respect to the main body part,
A snap ring assembling apparatus comprising: The snap ring holding portion has a substantially cylindrical shape that comes into contact with the opening end surface of the mounted member.
The pressing end surface is circular, and the outer diameter of the pressing end surface is smaller than the inner diameter of the snap ring holding portion,
The snap ring assembling apparatus according to claim 1, wherein the pressing portion is supported on the inner peripheral side of the snap ring holding portion so as to be relatively movable in the axial direction.   The snap ring assembling apparatus according to claim 1 or 2, wherein an inner diameter of the snap ring holding portion is smaller than an opening hole diameter of the mounted member into which the snap ring is introduced.   4. The snap ring according to claim 1, wherein one end surface of the snap ring holding portion that can contact the opening end surface of the mounted member has an inner diameter side protruding outward in an axial direction from an outer diameter side. Assembly device.   The snap ring assembling apparatus according to any one of claims 1 to 4, further comprising a locking operation section that locks the locking section to the mounted member or the fixing member.   The snap according to any one of claims 1 to 5, wherein the operation unit is rotatably connected to the main body unit, and converts the rotational movement with respect to the main body unit into a linear motion to move the pressing unit in the axial direction. Ring assembly device.   The snap ring assembling apparatus according to claim 6, wherein the operation unit is a toggle. The operation unit is
A driving member that is supported by the pressing portion so as to be movable in the axial direction, and that engages with the pressing portion and moves the pressing portion in the axial direction with respect to the main body portion as it is inclined with respect to the pressing portion; ,
A gripping lever that is supported by the body portion so as to be swingable about a substantially orthogonal axis of the pressing portion, and a gripping lever that tilts the driving member by engaging a swinging action point with an eccentric position of the driving member; ,
A lock lever that is swingably supported by the pressing portion and that can lock the axial position of the pressing portion with respect to the main body portion;
The snap ring assembling apparatus according to claim 6 having.

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