Press-fitting device

Abstract

To inhibit collision noise.SOLUTION: A press-fitting device press-fits a press-fitting component into an insertion hole of the press-fitting component at a mating component and has a driving jig which transmits a striking force input thereto to the press-fitting component; a first impact absorption material provided at a facing part facing the mating component in the driving jig; and a contact part with which the first impact absorption material contacts when a press-fitting length of the press-fitting component into the insertion hole reaches a predetermined length.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a press-fitting device. [Background technology]

[0002] Various tools have been proposed that utilize compressed air to insert pins into pin insertion holes. Patent Document 1 discloses a tool that applies the impact force of compressed air repeatedly to a pin driving tool to insert a pin held at the tip of the pin driving tool into a pin insertion hole in a mating member. In this tool, a pin holding hole for holding the pin is opened at the tip of the pin driving tool. In this tool, a resin pad is inserted into the bottom of the pin holding hole to reduce the impact noise generated when a striking force is applied to the pin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 1-026179 Summary of the Invention [Problem to be solved by the invention]

[0004] When the pin driving tool is used while in contact with the opposing member, the impact force is transmitted to the opposing member, generating a collision noise. When inserting a pin into a pin insertion hole in a mating member, it is necessary to control the insertion length of the pin into the pin insertion hole. If the pin is inserted while the tip of the pin driving tool is in contact with the mating member, the insertion length of the pin can be controlled to be approximately constant. However, it is impossible to avoid the generation of a collision sound. Therefore, there is a need to suppress the impact noise that occurs when the pin, which is a press-fit component, is inserted. [Means for solving the problem]

[0005] One aspect of the present invention is A press-fitting device that presses a press-fit part into an insertion hole of a mating part, A driving jig that transmits the input impact force to the press-fit part; A first impact absorbing material provided at a portion of the driving jig facing the mating component; and a contact portion with which the first impact absorbing material comes into contact when the press-fit length of the press-fit part into the insertion hole reaches a predetermined length. Effect of the Invention

[0006] According to one aspect of the present invention, it is possible to suppress impact noises that occur when a pin, which is a press-fit component, is inserted. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram illustrating a press-fitting device. [Diagram 2] FIG. 2 is a diagram illustrating a guide jig. [Diagram 3] FIG. 3 is an enlarged cross-sectional view showing a main part of the guide jig. [Figure 4] FIG. 4 is a plan view of the guide jig as viewed from above. [Diagram 5] FIG. 5 is a perspective view of the guide jig as viewed obliquely from below. [Figure 6] FIG. 6 is a diagram for explaining an example of use of the press-fitting device. [Figure 7] FIG. 7 is a diagram for explaining an example of use of the press-fitting device. [Figure 8] FIG. 8 is a diagram for explaining an example of use of the press-fitting device. [Figure 9] FIG. 9 is a diagram illustrating a guide jig according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described. Fig. 1 is a diagram illustrating a press-fitting device 1. For ease of explanation, Fig. 1 shows a cross section of a part of an air hammer 11, a part of an attachment part 12, a jig 13, a shock absorbing material 14, a press-fitting pin P, and a guide jig 2. Here, the attachment part 12 and the jig 13 constitute a driving jig according to the invention. In the following, when describing the positional relationship of each component of the press-fitting device 1, for convenience of explanation, the description will be based on the vertical direction in Fig. 1. For example, when the term "upper surface" is used, it means the surface on the upper side in the vertical direction in Fig. 1. Therefore, even when the term "upper surface" is used in the specification, it may refer to the surface located on the lower side depending on the state of use of the press-fitting device 1.

[0009] As shown in FIG. 1, the press-fitting device 1 has a jig 13 connected to an air hammer 11, and a guide jig 2 having an insertion hole 210 for a press-fitting pin P (press-fitting part). The jig 13 is connected to the main body 110 of the air hammer 11 via the mounting part 12. In the air hammer 11, the shaft part 121 of the mounting part 12 is inserted from one end side (lower end side) in the longitudinal direction of the main body 110. A support part 122 having a larger diameter than the shaft part 121 is provided at the end of the area of ​​the shaft part 121 protruding from the main body 110.

[0010] The support portion 122 has a predetermined length in the direction of the central axis X of the shaft portion 121. An end face 122a is provided on the side of the support portion 122 opposite the shaft portion 121. The end face 122a is a flat surface perpendicular to the central axis X. The end face 122a can be said to be a portion facing a mating component. When viewed from the direction of the central axis X, the end face 122a has a circular shape. An engagement hole 122b opens in a region of the end face 122a that intersects with the central axis X. The engagement hole 122b is a bottomed hole provided in a direction along the central axis X.

[0011] The base portion 131 (large diameter portion) of the jig 13 is inserted into the engagement hole 122b from the direction of the central axis X. A through hole 122c that penetrates the support part 122 in the radial direction of the central axis X is open on the inner circumference of the engagement hole 122b. The opening on the outer circumference side of the through hole 122c is sealed with a sealant 123. An engagement piece 124 and a spring Sp2 are housed inside the through hole 122c. The spring Sp2 is located between the engagement piece 124 and the sealant 123. The engagement piece 124 is held in a position protruding from the inner circumference of the engagement hole 122b by the spring Sp2. The engagement piece 124 is freely movable in and out of the engagement hole 122b by the biasing force acting from the spring Sp2.

[0012] The jig 13 is held inside the engagement hole 122b by the engagement piece 124 elastically engaging with a recessed groove 131a provided on the outer periphery of the base 131. The jig 13 is detachable from the support portion 122. The jig 13 has a cylindrical base 131 and an operating portion 132 (small diameter portion) having an outer diameter smaller than that of the base 131. The operating portion 132 is also cylindrical. The jig 13 is a rod-shaped member in which the base 131 and the operating portion 132 are arranged in series on the same axis. The boundary area between base portion 131 and operation portion 132 is a reduced diameter portion 133 whose outer diameter decreases from base portion 131 toward operation portion 132 . The operating portion 132 is formed in a shape capable of transmitting the impact force acting from the air hammer 11 to a cylindrical press-fit pin P, which will be described later. In this embodiment, the tip portion 132a of the operation portion 132 is a flat surface perpendicular to the central axis X. Furthermore, in this embodiment, the outer diameter R132 of the tip portion 132a is set to be the same as or slightly larger than the outer diameter Rp of the press-fit pin P.

[0013] In the mounting part 12, one end of the spring Sp is engaged with the outer periphery of the shaft part 121 on the support part 122 side. The other end of the spring Sp is engaged with the main body part 110. The spring Sp applies a biasing force to the mounting part 12 in a direction to pull the mounting part 12 into the main body part 110. A mechanism for applying an impact force of compressed air to the mounting portion 12 is housed inside the main body 110. The impact force of compressed air is repeatedly applied to the mounting portion 12. The impact force applied to the mounting portion 12 is applied to the press-fit pin P via a jig 13 supported by the mounting portion 12.

[0014] The shock absorbing material 14 is fixed to the end surface 122a of the mounting portion 12. In this embodiment, a resin material such as urethane is used as the shock absorbing material 14. The shock absorbing material 14 is not limited to a resin material. Any material that can absorb shock may be used. Another example is rubber.

[0015] The impact absorbing material 14 is formed with an outer diameter slightly smaller than the support portion 122. An insertion hole 141 is formed in the center of the impact absorbing material 14. The insertion hole 141 penetrates the impact absorbing material 14 in the direction of the central axis X. When viewed from the direction of the central axis X, the impact absorbing material 14 is ring-shaped. The insertion hole 141 is formed with an inner diameter that allows the base 131 of the jig 13 to be inserted therethrough. When the jig 13 is attached to the mounting portion 12, the impact absorbing material 14 is arranged to surround the outer periphery of the base 131 on the mounting portion 12 side.

[0016] The configuration of the guide jig 2 will be described below. Fig. 2 is a diagram for explaining the guide jig 2. In Fig. 2, the components of the guide jig 2 (base plate 21, guide tube 22, cover portion 23, shock absorbing material 24, holder portion 25, and handle portion 26) are shown in a cross section passing through the center of the insertion hole 210 of the base plate 21, and are exploded and shown in a schematic manner. Fig. 3 is an enlarged cross-sectional view showing a main part of the guide jig 2. Fig. 3 shows a cross section of the jig 13 when it is placed in an initial position for pressing in the press-fit pin P. Fig. 3 shows the press-fit pin P and members connected by the press-fit pin P (connecting portion 51 of manual plate 50, shaft 55: see Fig. 6) arranged below the operating portion 132 of the jig 13. Fig. 4 is a plan view of the guide jig 2 as viewed from above, and Fig. 5 is a perspective view of the guide jig 2 as viewed obliquely from below.

[0017] As shown in FIG. 1, the guide jig 2 has a base plate 21, a guide tube 22, a cover portion 23, a shock absorbing material 24, a holder portion 25, and a handle portion 26. The base plate 21 is a plate-like member having a thickness W21. A guide tube 22 and a cover portion 23 are fixed to one surface 21a of the base plate 21 in the thickness direction. A shock absorbing material 24, a holder portion 25, and a handle portion 26 are fixed to the other surface 21b of the base plate 21 in the thickness direction.

[0018] The handle 26 has a gripping portion 261 that is substantially parallel to the base plate 21, and legs 262, 262 that extend from both sides of the gripping portion 261 in the longitudinal direction toward the base plate 21. A bolt (not shown) that penetrates the base plate 21 is screwed into the ends 262a, 262a of the legs 262, 262. The handle 26 is fixed to the base plate 21 by the bolt (not shown). In this state, the gripping portion 261 is disposed with a gap between it and the base plate 21. Therefore, a space Sa through which the operator's fingers can be inserted is formed between the base plate 21 and the gripping portion 261. This allows the operator to carry the guide jig 2 by gripping the gripping portion 261.

[0019] The handle portion 26 is positioned with reference to one side edge portion (the left side edge portion 211 in FIG. 1) of the base plate 21. At the other side edge portion (the right side edge portion 212 in FIG. 1) of the base plate 21, the holder portion 25 is positioned with reference to the side edge portion 212.

[0020] As shown in Fig. 4, the base plate 21 has side edges 213, 214 that are perpendicular to the side edge 211 in top view. The side edges 213, 214 are connected to one end and the other end of the side edge 211 in the longitudinal direction, respectively. The side edges 213, 214 extend linearly in a direction away from the side edge 211 (to the right in Fig. 4). The side edges 213, 214 are approximately parallel to each other. The length of side edge 214 (the length in the left-right direction in the drawing) is shorter than side edge 213. Side edge 214 is perpendicular to the central axis X and is connected to side edge 216 in the vicinity of a straight line C1 perpendicular to side edges 213, 214. In top view, side edge 216 is inclined in a direction approaching line C2 as it moves away from side edge 214 in a direction along line C2 (to the right in the figure). Side edge 216 is connected to side edge 212 in the vicinity of line C2. Here, line C2 is a line that is perpendicular to central axis X and line C1, and is also a line that is located on the same plane as line C1.

[0021] A side edge 213 extending from the side edge 211 is connected to a side edge 215 at a position beyond the straight line C1. In top view, side edge 215 is inclined toward line C2 as it moves away from side edge 213 in the direction along line C2 (to the right in the figure). In the direction of line C1 (the up-down direction in the figure), side edge 215 is connected to side edge 212 at a position approximately midway between line C2 and side edge 213.

[0022] In top view, the width of the base plate 21 in the direction of the straight line C1 (the vertical direction in the figure) narrows on the side opposite to the handle portion 26 as seen from the straight line C1 (the right side in the figure) as it moves away from the handle portion 26. By restricting the width on the side edge portion 212 side while ensuring the width necessary for connecting the handle portion 26 on the side of the side edge portion 211, the total weight of the guide jig 2 is reduced. In the base plate 21, an insertion hole 210 is provided in a region where the straight line C2 and the central axis X intersect (see FIGS. 1 and 2). The insertion hole 210 penetrates the base plate 21 in the thickness direction along the central axis X. Here, the lower surface 21a and the upper surface 21b of the base plate 21 are flat surfaces perpendicular to the penetrating direction of the insertion hole 210 (the direction of the central axis X).

[0023] The holder portion 25 is a plate-shaped member for positioning the shock absorbing material 24 at a predetermined position on the base plate 21. Like the shock absorbing material 14, the shock absorbing material 24 is also made of a resin material such as urethane. 4, the holder portion 25 has an opening 250 for exposing the impact absorbing material 24 in a plan view. The opening 250 is located approximately in the center of a plate-shaped base portion 251. 2, the opening 250 penetrates the base portion 251 of the holder portion 25 in the thickness direction. A locking portion 250a surrounding the entire periphery of the opening 250 is provided on a surface 251a of the base portion 251 facing the base plate 21. The facing surface 251a is a flat surface perpendicular to the central axis X. The impact absorbing material 24 has a base 241 formed with the same outer diameter as the opening 250. An insertion hole 240 is formed in the center of the base 241. The insertion hole 240 penetrates the base 241 in the direction of the central axis X. When viewed from the direction of the central axis X, the impact absorbing material 24 is ring-shaped. The insertion hole 240 is formed with an inner diameter that allows the base 131 of the jig 13 to be inserted therethrough (see FIG. 3).

[0024] A surface 241a of the base portion 241 facing the base plate 21 is a flat surface perpendicular to the central axis X. A flange portion 242 extending radially is provided on the outer periphery of the facing surface 241a. The flange portion 242 is provided over the entire circumference in the circumferential direction around the central axis X.

[0025] The shock absorbing material 24 is placed on the base plate 21 so that the insertion hole 240 of the shock absorbing material 24 is concentric with the insertion hole of the base plate 21. In this state, when the holder part 25 is placed on the base plate 21 so as to cover the shock absorbing material 24, the base part 241 is accommodated in the opening 250 on the holder part 25 side. Furthermore, the flange portion 242 of the shock absorbing material 24 is housed in the locking portion 250a on the holder portion 25 side (see FIG. 3). In this state, when the holder portion 25 is fixed to the base plate 21 by the bolt BL (see FIG. 4), the flange portion 242 of the shock absorbing material 24 is gripped between the locking portion 250a and the base plate 21. As a result, the movement of the impact absorbing material 24 in the direction of the central axis X is restricted by the flange portion 242 engaged with the locking portion 250a on the holder portion 25 side. Therefore, the impact absorbing material 24 is positioned at a predetermined position on the base plate 21 in a state where it is restricted from falling off from the holder portion 25.

[0026] 4, guide pins 255 are fixed to the upper surface of the holder portion 25. Three guide pins 255 are provided at intervals in the circumferential direction around the central axis X. In top view, the guide pins 255 are provided at positions circumscribing an imaginary circle Im1 at intervals of 120° in the circumferential direction around the central axis X. The imaginary circle Im1 is a circle whose center is on the central axis X and whose diameter is larger than that of the opening 250. In this embodiment, the imaginary circle Im1 is further set to a diameter that matches the outer diameter of the mounting portion 12 (support portion 122: see FIG. 1) on the air hammer 11 side.

[0027] In this embodiment, the three guide pins 255 , 255 , 255 function as guides for positioning the jig 13 . Specifically, when inserting the operating portion 132 of the jig 13 into the insertion hole 240 of the impact absorbing material 24, the mounting portion 12 (support portion 122) that supports the jig 13 is positioned between the three guide pins 255, 255, 255 so that the operating portion 132 of the jig 13 is positioned opposite the insertion hole 240. This allows the operating portion 132 side of the jig 13 to be smoothly inserted into the insertion hole 240 of the impact absorbing material 24, as shown in FIG.

[0028] As shown in FIGS. 2 and 4, the holder portion 25 is fixed to the surface 21b of the base plate 21 by bolts BL disposed outside the guide pins 255. As shown in FIG.

[0029] As shown in FIG. 1, a cover portion 23 and a guide tube 22 are fixed to a surface 21a on the opposite side in the thickness direction of the base plate 21 by bolts (not shown). 5, the cover portion 23 is a plate-like member formed to a size sufficient to cover the entire surface of the base plate 21. The cover portion 23 is formed to have a reference thickness W23 (see FIG. 2) excluding the peripheral edge portion. A lower surface 23a of the cover portion 23 opposite to the base plate 21 is a flat surface perpendicular to the central axis X. In this embodiment, the lower surface 23a of the cover portion 23 is used as a reference surface when the guide jig 2 is used. Specifically, the lower surface 23a of the cover portion 23 is supported on a reference surface of the mating member (a joint surface 61 of a transmission case 60 described later: see FIG. 6). This allows the inclination of the rod-shaped jig 13 held by the air hammer 11 with respect to the mating member to be maintained at a preset inclination.

[0030] 2, the cover portion 23 has an opening 230 in a region intersecting with the central axis X. The inner diameter R230 of the opening 230 is larger than the inner diameter R210 of the insertion hole 210 on the cover portion 23 side. Furthermore, the inner diameter R230 is larger than the outer diameter R222 of the flange-shaped connecting portion 222 of the guide tube 22. Therefore, the guide tube 22 is adapted to be directly attached to the surface 21a of the base plate 21 inside the opening 230.

[0031] In the guide tube 22, a connection portion 222 is provided at one end of a cylindrical tube portion 221. The connection portion 222 is a flange-shaped portion that surrounds the entire outer periphery of the tube portion 221. A surface 222a of the connection portion 222 facing the base plate 21 is a flat surface that is perpendicular to the central axis X.

[0032] The cylindrical portion 221 is provided in a direction perpendicular to the opposing surface 222a, and extends linearly in a direction away from the connecting portion 222 along the central axis X. The inside of the cylindrical portion 221 forms an insertion hole 220 through which the operating portion 132 can pass. The insertion hole 220 has an expanded diameter portion 220a in which the inner diameter D220a becomes wider in a region located inside the connecting portion 222 toward the base plate 21 side (upper side in FIG. 2). The inner diameter D220 of the insertion hole 220 is set to an inner diameter into which the press-fit pin P can be inserted, preferably an inner diameter that matches the outer diameter of the press-fit pin P. Furthermore, the inner diameter D220 of the insertion hole 220 is set to an inner diameter into which the operation portion 132 of the jig 13 can be inserted. Here, the inner diameter matching the outer diameter of the press-fit pin P means that the press-fit pin P can pass through the insertion hole 220 without receiving a large sliding resistance.

[0033] 5, a positioning protrusion 27 and a wall portion 28 are provided on the lower surface 23a of the cover portion 23. The protrusion 27 and the wall portion 28 protrude in a direction away from the base plate 21. The protrusion 27 is a cylindrical member, and when the guide jig 2 is used, it engages with a positioning hole of the mating member. The wall portion 28 is a rectangular parallelepiped member, and when the guide jig 2 is used, it abuts against a wall portion of the mating member, and restricts rotation of the guide jig 2 about the protrusion 27.

[0034] An example of use of the press-fitting device 1 according to the embodiment will be described below, taking as an example a case in which a manual plate 50 and a shaft 55 provided in an automatic transmission for a vehicle are connected by a press-fitting pin P. 6 to 8 are diagrams for explaining an example of use of the press-fitting device 1. FIG. 6 shows the arrangement of the parts (manual plate 50 and shaft 55) into which the press-fit pin P is press-fitted in a transmission case 60. In FIG. 7, a state in which the guide jig 2 is placed on the transmission case 60 is shown. 6 and 7, in order to easily understand the position of the joint surface 61 between the transmission case 60 and another case, the joint surface 61 is shown with hatching. Furthermore, in Fig. 6, the area of ​​the joint surface 61 on which the guide jig 2 is placed is shown with cross hatching. FIG. 8 shows a schematic cross section of the periphery of the jig 13 when the guide jig 2 is placed on the transmission case 60. As shown in FIG.

[0035] For example, as shown in Fig. 6, a manual plate 50 provided in an automatic transmission for a vehicle is used to operate a parking rod (not shown) of a parking mechanism. In the parking mechanism, the manual plate 50 rotates in conjunction with the rotation of a shaft 55 to move the parking rod forward and backward, thereby operating the parking mechanism. The shaft 55 is rotated by an actuator or the like arranged outside the transmission case 60. Therefore, in the transmission case 60 of the automatic transmission of the vehicle, the shaft 55 passes through a peripheral wall portion 65 of the transmission case 60.

[0036] The manual plate 50 has a connecting portion 51 with the shaft 55. The connecting portion 51 is a cylindrical portion attached to the manual plate 50. The connecting portion 51 of the manual plate 50 is fitted onto one end side of the shaft 55 inside the transmission case 60. In this embodiment, the connecting portion 51 and the shaft 55 are connected by a press-fit pin P so that the shaft 55 and the manual plate 50 can rotate together. Therefore, in the connecting portion 51, the through hole 51a of the press-fit pin P opens to a flat surface 510 provided on the outer periphery of the connecting portion 36. As shown in Fig. 8, the shaft 55 has a through hole 55a in a region inserted into the connecting portion 51. The through hole 55a penetrates the shaft 55 in the direction of a straight line Lc along the diameter line, and is formed with an inner diameter Dx into which the press-fit pin P can be press-fitted. The connecting portion 51 of the manual plate 50 has an insertion hole 511 with an inner diameter that matches the outer diameter of the shaft 55. In a cross-sectional view, the connecting portion 51 is generally ring-shaped. The connecting portion 51 is provided with through holes 51a, 51a that penetrate the connecting portion 51 along a diameter line Lc. The through holes 51a, 51a are also formed with an inner diameter Dx into which the press-fit pin P can be press-fitted.

[0037] The manual plate 50 and the shaft 55 are connected as follows. (a) The shaft 55 is inserted into the insertion hole 511 of the connecting portion 51 of the manual plate 50. (b) The through-hole 55a on the shaft 55 side and the through-hole 51a of the connecting portion 51 of the manual plate 50 are aligned in phase in the circumferential direction about the central axis C (see FIG. 8). (c) A collision force is repeatedly applied to the press-in pin P from the operating portion 132 of the jig 13, so that the press-in pin P is pressed through the through hole 51a, the through hole 55a, and the through hole 51a on the opposite side (see FIG. 3).

[0038] 8, the insertion position of the press-in pin P is located on the rear side (lower side in the figure) when viewed from the joint surface 61 of the transmission case 60. Therefore, it is not easy for an operator to place the press-in pin P held by hand in a predetermined position and then apply a collision force to the press-in pin P from the operation part 132 of the jig 13.

[0039] In this embodiment, the guide jig 2 is used to make it easier to press-fit the press-fit pin. As shown in Fig. 8, transmission case 60 has joint surfaces 61, 61A with other cases at the ends of peripheral wall portion 65. The joint surfaces 61, 61A are aligned at the same height in the height direction of peripheral wall portion 65 (the up-down direction in Fig. 8), and can be used as reference surfaces on the transmission case 60 side.

[0040] As shown in Fig. 6, bolt holes 62 are opened in joint surfaces 61, 61A. A plurality of bolt holes 62 are provided along joint surface 61. As shown in Fig. 5, in cover portion 23 having a reference surface (lower surface 23a) on the guide jig 2 side, protrusion 27 and wall portion 28 are provided protruding from lower surface 23a. In this embodiment, the guide jig 2 is set at a predetermined position on the transmission case 60 in the following procedure. (a) The lower surface 23a of the guide jig 2 is placed on the joint surface 61 while the protrusion 27 (see FIG. 5) on the guide jig 2 side is engaged with the bolt hole 62a on the transmission case 60 side (see FIGS. 6 and 7). (b) The guide jig 2 is rotated around the protrusion 27, and the wall portion 28 is brought into contact with the outer peripheral edge 610 (see FIG. 6) of the joint surface 61 of the transmission case 60, thereby positioning the guide jig 2. As a result, the guide jig 2 is placed in the area of ​​the joint surface 61A shown by the crossed hatching in FIG.

[0041] The guide jig 2 is placed on the joint surface 61, whereby it is positioned in a direction perpendicular to the joint surface 61 (the vertical direction in FIG. 8). Furthermore, the protrusion 27 engaged with the bolt hole 62a and the wall portion 28 abutting against the outer circumferential edge 610 of the joint surface 61 position the protrusion 27 in the circumferential direction about the central axis X1 (see FIG. 7).

[0042] As a result, the base plate 21 is disposed parallel to the joint surface 61 on the transmission case 60 side and the lower surface 23a on the guide jig 2 side, which are used as reference surfaces. Here, the guide tube 22 is disposed in a direction perpendicular to the base plate 21 . Therefore, the guide tube 22 is disposed inside the transmission case 60 facing the connecting portion 51 of the manual plate 50 . In this embodiment, the length L22 (see FIG. 8) of the guide tube 22 is set so that a gap h is generated between the lower end 22a of the guide tube 22 and the flat surface 510 of the connecting portion 51. By not bringing the guide tube 22 into contact with the connecting portion 51, it is possible to prevent a collision force from being directly transmitted from the guide tube 22 to the connecting portion 51 during press-fitting.

[0043] When the guide jig 2 is placed on the joint surface 61, the insertion hole 240 of the shock absorbing material 24 opens at the top of the guide jig 2. Directly below the insertion hole 240, the insertion hole 210 of the base plate 21 and the insertion hole 220 of the guide tube 22 are located. Therefore, when the press-in pin P is inserted into the insertion hole 240 of the impact absorbing material 24, the press-in pin passes through the insertion holes 240, 210, 220 and moves downward toward the connecting portion 51 side by its own weight. In this case, the lower end 22a of the guide tube 22 faces the flat surface 510 of the connecting portion 51 with a gap h therebetween, so that a part of the press-in pin P protrudes from the lower end 22a of the guide tube 22, and the lower end of the press-in pin P is positioned in a position in contact with the through hole 51a that opens directly below the guide tube 22 (see the press-in pin P shown by the virtual line in Figure 8).

[0044] In the press-fitting device 1, in order to apply an impact force to the press-fitting pin P, it is necessary to bring the operating portion 132 of the jig 13 into contact with the press-fitting pin P when using the press-fitting device 1. For this purpose, the operating portion 132 of the jig 13 is inserted through the insertion hole 210 of the impact absorbing material 24 and brought into contact with the press-fit pin P inside the guide tube 22 (see FIG. 3). At this time, the mounting portion 12 (support portion 122) that supports the jig 13 is positioned between the three guide pins 255, 255, 255 so that the operating portion 132 side of the jig 13 can be smoothly inserted into the insertion hole 240 of the impact absorbing material 24.

[0045] Next, with the operating portion 132 of the jig 13 in contact with the press-fit pin P, a collision force is transmitted from the jig 13 to the press-fit pin P, thereby pressing the press-fit pin P into the inside of the object to be pressed in. In this embodiment, as shown in FIG. 3, when the press-in pin P is pressed in, the impact absorbing material 14 is set to abut against the abutment portion (impact absorbing material 24) on the guide jig 2 side when the press-in length (insertion length) of the press-in pin P from the press-in starting point st reaches a predetermined length La. Specifically, the height h14 of the impact absorbing material 14 in the direction of the central axis X and the length of the jig 13 are set so that when the operating part 132 is brought into contact with the press-in pin P, the separation distance in the opposing direction between the impact absorbing material 14 and the impact absorbing material 24 becomes the same as the predetermined length La, which is the press-in length of the press-in pin P.

[0046] As a result, when the impact force is transmitted to the press-fit pin P, the impact absorbing materials 14 and 24 collide with each other in the direction of the central axis X. As described above, the impact absorbing materials 14 and 24 are made of a resin material capable of absorbing impact, so that the impact force is absorbed by the impact absorbing materials 14 and 24, and the magnitude of the impact force propagated to the base plate 21, which is the abutting portion on the guide jig 2 side, can be reduced. Furthermore, the impact sound is also reduced.

[0047] Here, the contact portion on the guide jig 2 side is the shock absorbing material 24 when the guide jig 2 is provided with the shock absorbing material 24, and is the surface 21b of the base plate 21 when the shock absorbing material 24 is not provided. Therefore, when the shock absorbing material 24 is not provided, as an example, the height h14 of the shock absorbing material 24 in the direction of the central axis X is increased so that the distance indicated by the symbol La' in FIG. 3 approximately coincides with the predetermined length La.

[0048] FIG. 9 is a diagram illustrating a guide jig 2A according to a modified example. In the above embodiment, the insertion holes (through holes 51a, 55a) of the press-fit pins P are arranged with their openings facing upward in the direction of the vertical line VL (see FIG. 8). Due to limitations in the layout of the mating component, the opening direction of the insertion holes (through holes 51a, 55a) is not necessarily along the vertical line VL. For example, there are cases where the openings face a direction inclined with respect to the vertical line VL (see FIG. 9).

[0049] The guide jig 2A is a jig that is used when the insertion holes (through holes 51a, 55a) of the press-fit pins P are inclined with respect to the vertical line VL. The guide jig 2A has a base plate 21A with a cross-sectional shape different from that of the base plate 21 of the guide jig 2 described above. An inclined surface 21c is provided on the upper surface 21b of the base plate 21A on the side edge 212 side (the right side in FIG. 9). The inclined surface 21c is inclined at a predetermined angle θ with respect to the upper surface 21b along the horizontal line HL. This angle θ is the same as the inclination angle θ of the insertion holes (through holes 51a, 55a) of the press-fit pins P with respect to the vertical line VL.

[0050] The holder portion 25 is attached to the inclined surface 21c. The impact absorbing material 24 is disposed in a state in which it is held between the holder portion 25 and the inclined surface 21c. In this state, the insertion hole 240 of the impact absorbing material 24 is disposed concentrically with the insertion holes (through holes 51a and 55a).

[0051] A recess 217 is provided on the lower surface 21a of the base plate 21A on the side of the side edge 212 (the right side in FIG. 9). The recess 217 is recessed toward the inclined surface 21c from the surface 21a. An insertion hole 210 opens in a bottom surface 217a of the recess 217. The bottom surface 217a is a flat surface parallel to the inclined surface 21c. A straight line Lv2 along the inclined surface 21c and a straight line Lv1 along the bottom surface 217a are perpendicular to the opening direction of the insertion hole 210. A connecting portion 222 of the guide tube 22 is attached to the bottom surface 217a. A tube portion 221 of the guide tube 22 is provided in a direction perpendicular to the bottom surface 217a and extends linearly in a direction away from the connecting portion 222.

[0052] When the guide jig 2A having such a configuration is placed on the joint surface 61 of the transmission case 60, the guide tube 22 is disposed along and on a straight line Lc that is aligned with the opening direction of the insertion holes (through holes 51a, 55a) of the press-fit pin P. Furthermore, the lower end 22a of the guide tube 22 faces the flat surface 510 of the connecting portion 51 with a gap h therebetween. In this state, at the top of the guide jig 2A, the shock absorbing material 24 is in contact with the peripheral portion surrounding the opening of the insertion hole 210, and the opening of the insertion hole 240 of the shock absorbing material 24 faces diagonally upward. On the extension of the insertion hole 240, the insertion hole 210 of the base plate 21A and the insertion hole 220 of the guide tube 22 are located along the straight line Lc. Therefore, when the press-in pin P is inserted into the insertion hole 240 of the impact absorbing material 24, the press-in pin passes through the insertion holes 240, 210, 220 and moves downward toward the connecting portion 51 side by its own weight. As a result, a portion of the press-in pin P protrudes from the lower end 22a of the guide tube 22, and the lower end of the press-in pin P is positioned in contact with the through hole 51a that opens on an extension of the guide tube 22 (see the press-in pin P shown by the virtual line in Figure 9).

[0053] Then, the mounting portion 12 (support portion 122) that supports the jig 13 is disposed between the three guide pins 255, 255, 255, while the operation portion 132 of the jig 13 is inserted through the insertion hole 240 of the impact absorbing material . As a result, the operating portion 132 of the jig 13 is disposed in the guide tube 22 in a direction along the straight line Lc, and contacts the press-fit pin P from the direction of the straight line Lc.

[0054] As a result, when a collision force is transmitted from the jig 13 to the press-in pin P with the operating portion 132 of the jig 13 in contact with the press-in pin P, the collision force acts on the press-in pin P from the direction of the straight line Lc, and the press-in pin P is pressed into the insertion hole (through hole 51a, through hole 55a). In this way, even if the insertion holes (through holes 51a, 55a) of the press-fit pins P are inclined with respect to the vertical line VL, the press-fit pins P can be press-fitted into the insertion holes (through holes 51a, 55a).

[0055] Furthermore, in the modified example, when the press-in length (insertion length) of the press-in pin P reaches a predetermined length La, the impact absorbing material 14 abuts against the abutment portion (impact absorbing material 24) on the guide jig 2A side from the direction of the straight line Lc. As a result, when the impact force is transmitted to the press-fit pin P, the impact absorbing materials 14 and 24 collide with each other in the direction of the central axis X. As described above, the impact absorbing materials 14 and 24 are made of a resin material capable of absorbing impact, so that the impact force is absorbed by the impact absorbing materials 14 and 24, and the magnitude of the impact force propagated to the base plate 21A, which is the contact portion on the guide jig 2 side, can be reduced. The generation of loud impact noise can also be suppressed.

[0056] Here, the guide tube 22 and the base plates 21 and 21A are replaceable. Therefore, a plurality of guide tubes 22 having different lengths L22 (see FIG. 8) and a plurality of base plates 21 having different inclinations of the insertion holes 210 are prepared. Then, by preparing a guide jig by appropriately selecting and combining the guide tubes 22 and the base plates 21 according to the position and inclination of the insertion hole into which the press-fit pin P is press-fitted, a highly versatile guide jig can be provided.

[0057] The configuration of the press-fitting device 1 according to an embodiment of the present invention will be listed below. (1) The press-fitting device 1 is a tool for press-fitting a press-fit pin P (press-fit component) into an insertion hole (through hole 51a, through hole 55a) of the press-fit component in a mating component. The press-fitting device 1 includes a press-fitting jig (a mounting portion 12, a jig 13) that transmits an input impact force to the press-fitting pin P, A shock absorbing material 14 (first shock absorbing material) provided on an end surface 122a of the mounting portion 12, which is a portion facing a mating component; and a contact portion with which the impact absorbing material 14 comes into contact when the press-fit length of the press-fit pin P into the insertion hole reaches a predetermined length La.

[0058] With this configuration, when the press-in length of the press-in pin P reaches the predetermined length La, the impact absorbing material 14 comes into contact with the contact portion, and the press-in of the press-in pin P by the jig 13 ends. The transmission of the impact force input to the jig 13 to the contact portion is mitigated by the impact absorbing material 14, so that the impact noise generated when the press-in pin P is inserted can be suppressed. This makes it possible to control the press-in length of the press-in pin P and suppress the impact noise generated when the press-in pin P is pressed in.

[0059] (2) A guide jig 2 having an insertion hole for the press-fit pin P is provided. The insertion hole is configured by connecting an insertion hole 220 (first hole portion) having an inner diameter matching the outer diameter of the press-fit pin P and an insertion hole 210 (second hole portion) having a larger diameter than the insertion hole 220 in the axial direction. A shock absorbing material 24 (second shock absorbing material) that functions as a contact portion is provided on the peripheral edge surrounding the opening of the insertion hole 210 in the guide jig 2.

[0060] With this configuration, when the press-in length of the press-in pin P reaches the predetermined length La, the shock absorbing material 14 on the jig 13 side comes into contact with the shock absorbing material 24 (second shock absorbing material) on the guide jig 2 side. As a result, the transmission of the impact force input to the jig 13 is mitigated by the two shock absorbing materials 14, 24, and it is expected that the impact sound generated when the press-in pin P is inserted can be further suppressed.

[0061] (3) On the side of the insertion hole 220 (first hole portion) facing the insertion hole 210 (second hole portion), there is provided an expanded diameter portion 220a whose inner diameter becomes larger toward the insertion hole 210.

[0062] When configured in this manner, the insertion holes (insertion holes 220, 210) on the guide jig 2 side and the insertion holes (through holes 51a, 55a) for the press-in pin P of the opposing member are arranged coaxially, and by simply inserting the press-in pin P into the insertion hole on the guide jig 2 side, the press-in pin P can be positioned opposite the insertion holes (through holes 51a, 55a). This reduces the time required to position the press-in pins P and the insertion holes (through holes 51a and 55a). This is expected to reduce the work time required to press-in the press-in pins P and improve the work efficiency of the press-in work.

[0063] (4) The guide jig 2 is A base plate 21 (plate portion) having an insertion hole 210 corresponding to a part of the insertion hole; a guide tube 22 (cylindrical portion) that is fixed to one surface 21a in the thickness direction of the base plate 21 and has an insertion hole 220 that corresponds to the remaining portion of the insertion hole; The holder portion 25 is fixed to the other surface 21b of the base plate 21 in the thickness direction, and holds the shock absorbing material 24 between the holder portion 25 and the base plate 21. In the base plate 21, a surface 21a which is the mounting surface for the guide tube 22 and a surface 21b which is the mounting surface for the holder portion 25 are flat surfaces perpendicular to the penetrating direction of the insertion hole 210.

[0064] With this configuration, the press-in direction of the press-in pin P can be adjusted by changing the penetration direction (inclination) of the insertion hole 210. The press-in pin P can be easily pressed in when the insertion holes (through holes 51a, 55a) of the press-in pin P are arranged with their openings facing upward in the vertical line VL direction. However, due to layout restrictions of the mating component, the opening direction of the insertion holes (through holes 51a, 55a) is not necessarily along the vertical line VL. For example, the opening may be oriented in a direction inclined relative to the vertical line VL. When the inclination relative to the vertical line VL is within a range in which the penetration direction of the insertion hole 210 of the base plate 21 can be adjusted, the penetration direction of the insertion hole 210 and the opening direction of the insertion holes (through holes 51a, 55a) can be matched to arrange the press-fit pin P coaxially with the insertion holes (through holes 51a, 55a). This is expected to improve the efficiency of the press-fitting operation.

[0065] (5) The jig 13 is It has a rod-shaped member that has a base 131 (large diameter portion) that is inserted and supported in the engagement hole 122b (support hole) of the mounting portion 12 (support portion) and an operating portion 132 (small diameter portion) that has an outer diameter smaller than that of the base 131, which are connected coaxially in the axial direction. The impact absorbing material 14 (first impact absorbing material) is fitted onto the base portion 131 and disposed at a position where it abuts against the mounting portion 12 in the axial direction. The holder portion 25 (holder portion) has an opening 250 (first opening) having an opening diameter that matches the outer diameter of the impact absorbing material 24 when viewed in the axial direction, and a locking portion 250a (second opening) having a diameter larger than that of the opening 250, The locking portion 250a is located at the end of the opening 250 on the base plate 21 side. The impact absorbing material 24 (second impact absorbing material) has a rib-shaped flange portion 242 at the end on the base plate 21 side, which is inserted into the engagement portion 250a.

[0066] When configured in this manner, the flange portion 242 of the impact absorbing material 24 is gripped between the holder portion 25 and the base plate 21, so that the impact absorbing material 24 is positioned in a state in which it is prevented from falling off the holder portion 25. Furthermore, when the press-in length of the press-in pin P reaches the predetermined length La, the shock absorbing material 14 on the jig 13 side and the shock absorbing material 24 on the guide jig 2 side can be reliably brought into contact with each other. As a result, the transmission of the impact force input to the jig 13 to the guide jig 2 side is mitigated by the two shock absorbing materials 14, 24 (first shock absorbing material, second shock absorbing material), so that it is expected that the impact sound generated when the press-in pin P is inserted can be suppressed.

[0067] (6) When viewed from the direction of the central axis X (axial direction), the holder portion 25 is provided with a guide pin 255 at a position that surrounds the opening 250 and circumscribes an imaginary circle Im1 along the outer periphery of the mounting portion 12 (support portion), At least three guide pins 255 are provided at intervals in the circumferential direction of the imaginary circle Im1.

[0068] With this configuration, the mounting portion 12 with the jig 13 attached thereto can be inserted between the guide pins 255, 255, 255, whereby the jig 13 can be easily positioned. When the mounting portion 12 is inserted between the guide pins 255, 255, 255, the jig 13, the guide tube 22 of the guide jig 2, and the insertion holes of the press-in part in the mating part (through hole 51a, through hole 55a) are set to be arranged coaxially, so that the press-in pin P can be positioned opposite the insertion holes (through hole 51a, through hole 55a) simply by inserting the press-in pin P into the insertion hole on the guide jig 2 side. This can reduce the time required to position the press-in pin P and the insertion holes (through holes 51a and 55a). This can reduce the work time required to press-in the press-in pin P and improve the work efficiency of the press-in work. Then, when the press-in length of the press-in pin P reaches the predetermined length La, the impact absorbing material 14 on the driving jig side and the impact absorbing material 24 on the guide jig side can be brought into contact with each other reliably and easily. This allows the two shock absorbing materials 14, 24 (the first shock absorbing material and the second shock absorbing material) to reduce the transmission of the impact force input to the driving jig to the guide jig 2 as the contact member. This is expected to reduce the impact noise when the press-in pin P is inserted.

[0069] In the above-described embodiment, a method of fixing the jig 13 in the engagement hole 122b of the mounting portion 12 is exemplified in which the engagement piece 124 is elastically engaged with the groove 131a provided on the outer periphery of the base 131 of the jig 13 by the biasing force of the spring Sp2. The method of fixing the jig 13 is not limited to this embodiment. For example, the jig 13 may have an elastic O-ring attached to the base 131. In this case, by inserting the region of the base 131 where the elastic O-ring is attached into the engagement hole 122b of the mounting part 12, the jig 13 can be held in a state inserted into the engagement hole 122b of the mounting part 12 by the elastic force of the elastic O-ring.

[0070] In the above embodiment, the guide pins 255 are provided at intervals of 120° in the circumferential direction around the central axis X at positions circumscribing the imaginary circle Im1 in a top view (see FIG. 4). The intervals of the guide pins 255 are not limited to 120°. The intervals may be slightly deviated from 120° in relation to other components, for example, an attachment portion on the driving jig side.

[0071] Although the embodiment of the present invention has been described above, the above embodiment merely shows one application example of the present invention, and the technical scope of the present invention is not limited to the specific configuration of the above embodiment. Appropriate modifications are possible within the scope of the technical concept of the invention. [Explanation of symbols]

[0072] 1: Press-fitting device 12: Mounting part (driving jig) 122: Support part 122a: End face (opposing part with the mating part) 122b: Engagement hole (support hole of support part) 13: Jig (driving jig) 131: Base (large diameter part) 132: Operation part (small diameter part) 14: Shock absorbing material (first shock absorbing material) 2, 2A: Guide jig 21, 21A: Base plate (plate part) 21a: Surface (Guide tube mounting surface) 21b: surface (mounting surface of holder part) 21c: Inclined surface (mounting surface of holder part) 210: Insertion hole (second hole portion) 217a: Bottom surface (mounting surface of holder part) 22: Guide tube (cylindrical part) 220: Insertion hole (first hole portion) 24: Shock absorbing material (second shock absorbing material) 242: Flange part (rib) 25: Holder part 51: Connection part (counterpart) 51a: Through hole (insertion hole for press-fit parts) 55: Shaft (counterpart) 55a: Through hole (insertion hole for press-fit parts) Im1: Virtual circle La: specified length P: Press-fit pin

Claims

1. A press-fitting device that presses a press-fit part into an insertion hole of a mating part, A driving jig for transmitting an input impact force to the press-fitted part; A first impact absorbing material provided at a portion of the driving jig facing the mating component; a contact portion with which the first shock absorbing material comes into contact when a press-fit length of the press-fit part into the insertion hole reaches a predetermined length.

2. In claim 1, a guide jig having an insertion hole for the press-fit component, The insertion hole is configured by connecting a first hole portion having an inner diameter matching an outer diameter of the press-fitting part and a second hole portion having a larger diameter than the first hole portion in the axial direction, A press-fitting device, wherein a second shock absorbing material functioning as the abutment portion is provided on a peripheral portion surrounding the opening of the second hole portion in the guide jig.

3. In claim 2, The press-fitting device, wherein the first hole portion is provided on the second hole portion side with an expanded diameter portion whose inner diameter increases toward the second hole portion.

4. In claim 3, The guide jig is a plate portion having a through hole corresponding to a part of the insertion hole; a cylindrical portion fixed to one surface of the plate portion in a thickness direction and having a remaining portion of the insertion hole; a holder portion that is fixed to the other surface of the plate portion in the thickness direction and that holds the second impact absorbing material between the plate portion and the holder portion, In the plate portion, the mounting surface of the cylindrical portion and the mounting surface of the holder portion are flat surfaces perpendicular to the penetration direction of the through hole.

5. In claim 4, The driving jig is a rod-shaped member including a large diameter portion inserted into a support hole of a support portion and a small diameter portion having an outer diameter smaller than that of the large diameter portion, the rod-shaped member being arranged coaxially in an axial direction; the first impact absorbing material is disposed at a position where it is fitted onto the large diameter portion and abuts against the support portion, The holder portion includes: a first opening having an opening diameter that matches an outer diameter of the first shock absorbing material as viewed in the axial direction; a second opening having a larger diameter than the first opening, the second opening is located at an end of the first opening on the plate portion side, The second shock absorbing material has a rib at an end portion on the plate portion side that is inserted into the second opening.

6. In claim 5, A guide pin is provided in the holder portion at a position surrounding the first opening and circumscribing a virtual circle along an outer periphery of the support portion, as viewed in the axial direction, At least three of the guide pins are provided at intervals in the circumferential direction of the imaginary circle.

Images