JP2017217678A - Caulking machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caulking machine with a simple structure which can stably obtain the fixed amount of caulking.SOLUTION: There is provided a caulking machine 10 for caulking a peripheral part of a hole of a second component in which a first component is press-fitted. The caulking machine includes: a body 11 which extends from a rear side to a front side in an axial direction; a hummer member 12 which is disposed on the body slidably in the axial direction, and has a claw 17 striking the peripheral part when the peripheral part is caulked; a stopper ring 13 which is disposed on an outer peripheral side of the body adjacent to the rear side of the hummer member, and can move in a vertical direction to the axial direction between an engaging position engaging with the hammer member and a releasing position releasing the engagement with the hammer member; a striking spring 14 for applying a forward load on the stopper ring; and a cam surface 15 which is provided on the body, and moves the stopper ring at the engaging position to the releasing position when the hammer member slides backward to the body by a predetermined distance.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a caulking machine, and more particularly to a caulking machine for caulking a peripheral portion of a hole of a second part into which a first part is press-fitted.

  For example, in the manufacturing process of a vehicle transmission, a bushing as a first part is press-fitted into a hole formed in a transmission case as a second part, and then a peripheral part of the hole of the transmission case is caulked to place the bushing in the hole. May be fixed.

JP 62-162476 A

  In general, the above caulking is performed manually by an operator applying a chisel to the peripheral portion of the hole and hitting the chisel with a hammer. Or the nail | claw of a jig | tool is applied to the surrounding part of a hole, a static pressure is given to a jig | tool with a press machine, and a nail | claw is pushed into the surrounding part of a hole slowly.

  However, in the former manual method, it is relatively difficult to adjust the amount of caulking, and a problem remains in terms of work safety. On the other hand, in the latter method using a press machine, a high static pressure is required for caulking, so that a relatively large press machine is required, and there is a problem that the equipment becomes large and the cost becomes high.

  Accordingly, the present invention has been made in view of such circumstances, and an object thereof is to solve at least one of the above-described problems, and in particular, a caulking machine having a simple structure capable of stably obtaining a certain amount of caulking. Is to provide.

According to one aspect of the invention,
A caulking machine for caulking the peripheral part of the hole of the second part into which the first part is press-fitted,
A main body extending from the rear to the front in the axial direction;
A hammer member disposed on the main body so as to be slidable in the axial direction, and having a claw for hitting the peripheral portion when the peripheral portion is caulked at a front end portion;
An axial direction between an engagement position that is disposed on the outer peripheral side of the main body adjacent to the rear of the hammer member and engages the hammer member and a release position in which the engagement with the hammer member is released. A stopper ring movable in a direction perpendicular to
A striking spring for applying a forward load to the stopper ring;
A cam surface that is provided on the main body and moves the stopper ring, which is in the engagement position, to the release position when the hammer member slides backward by a predetermined distance with respect to the main body;
A caulking machine characterized by comprising:

Preferably, the caulking machine is also for press-fitting the first part into the hole of the second part,
The main body has a pressing surface at the front end portion that presses the first component forward when the first component is press-fitted.

  Preferably, the caulking machine further includes a ring holder that holds the stopper ring so as to be movable in a direction perpendicular to the axial direction.

  Preferably, the caulking machine further includes a biasing spring that biases the stopper ring toward the engagement position.

  Preferably, the caulking machine further includes a return spring for urging the stopper ring backward with respect to the hammer member.

  Preferably, the cam surface is an inclined surface inclined with respect to the axial direction.

  Preferably, the first part has a cylindrical shape, and the main body has a support shaft at the front end portion that is fitted and inserted into a center hole of the first part when the first part is press-fitted.

  Preferably, the first part is a bush.

  According to the present invention, it is possible to solve at least one of the above problems, and in particular, it is possible to provide a caulking machine having a simple structure capable of stably obtaining a certain amount of caulking.

It is a perspective view which shows a 1st component and a 2nd component. It is a perspective view which shows the state after press-fit crimping. It is a perspective view which shows the whole caulking machine. It is a section perspective view showing the whole caulking machine. It is a disassembled perspective view which shows the components of the principal part of a crimping machine. It is VI-VI sectional drawing of FIG. 3 which shows the cross-sectional shape of a nail | claw. It is a cross-sectional perspective view of a ring holder. It is side surface sectional drawing for demonstrating the action | operation of a crimping machine. It is side surface sectional drawing for demonstrating the action | operation of a crimping machine. It is side surface sectional drawing for demonstrating the action | operation of a crimping machine.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 shows a first part and a second part to which the caulking machine according to this embodiment is applied. In the present embodiment, the second component is a housing of a vehicle transmission, that is, a transmission housing, and in particular, is a housing cylindrical portion 1 that is a part thereof. The first part is a cylindrical part, specifically a bush 2. The housing cylindrical part 1 has a circular hole 3. The caulking machine of this embodiment is used for the purpose of caulking the peripheral portion 4 of the hole 3 into which the bush 2 is press-fitted coaxially (the portion 4 positioned around the hole 3).

  In this embodiment, the transmission is a manual transmission that is applied to large vehicles such as trucks and buses. However, the types of the vehicle and the transmission are arbitrary, the vehicle may be a small vehicle such as a passenger car, and the transmission may be an automatic transmission.

  The bush 2 is a relatively thin cylindrical part, and has a front end portion 2A positioned forward in the axial direction and a rear end portion 2B positioned rearward in the axial direction. Here, the front in the press-fitting direction X is the front. The bush 2 has a symmetrical shape so that it can be inserted into the hole 3 from either the front or the rear, and has chamfered portions 2C and 2D for facilitating initial insertion into the hole 3 at the front end 2A and the rear end 2B. .

  The housing cylindrical portion 1 also has a chamfered portion 4A at the inlet portion of the hole 3 in order to facilitate initial insertion into the hole 3 of the bush 2. The chamfered portion 4A is included in the peripheral portion 4.

  FIG. 2 shows a state after the bush 2 is press-fitted into the hole 3 and the peripheral portion 4 is caulked (referred to as a state after press-fitting caulking). At the time of caulking, the caulking machine, which will be described later, strikes the peripheral portion 4 of the hole 3, particularly the chamfered portion 4 </ b> A, toward the front in the axial direction at a plurality of circumferential locations (three in this embodiment). As a result, caulking marks 5, that is, dents, are formed in the chamfered portion 4 </ b> A at three circumferential directions. The peripheral portion 4 located radially inward from the caulking trace 5 is plastically deformed radially inward, tightening the bush 2 from the radially outer side, and fixing the bush 2 in the hole 3.

  The bush 2 may function as a slide bearing. In this case, a shaft-like component (not shown) is inserted into the bush 2 in a later process, and the shaft-like component is rotatably supported.

  Next, the caulking machine of this embodiment will be described. 3 is a perspective view showing the entire caulking machine 10, FIG. 4 is a cross-sectional perspective view showing the entire caulking machine 10, and FIG. 5 is an exploded perspective view showing the main components of the caulking machine 10. As shown in FIG.

  As shown in FIGS. 3 to 5, the caulking machine 10 includes a main body 11 extending from the rear to the front in the direction (axial direction) of the longitudinal central axis C, and a hammer disposed on the main body 11 so as to be axially slidable. A member 12, a stopper ring 13 disposed on the outer peripheral side of the main body 11 adjacent to the rear of the hammer member 12, a striking spring 14 for applying a forward load to the stopper ring 13, and a cam provided on the main body 11 A surface 15.

  The caulking machine 10 also has a function of press-fitting the bush 2 into the hole 3 of the housing cylindrical portion 1 before caulking. The main body 11 has a pressing surface 16 at the front end portion that presses the bush 2 forward when the bush 2 is press-fitted. The hammer member 12 has a claw 17 at the front end portion that strikes the peripheral portion 4 of the hole 3 when the peripheral portion 4 (the chamfered portion 4A) of the hole 3 is caulked. The stopper ring 13, which will be described in detail later, is a direction perpendicular to the axial direction (illustrated example) between an engagement position where the stopper ring 13 is engaged with the hammer member 12 and a release position where the engagement with the hammer member 12 is released. Then, it can move up and down. As will be described in detail later, the cam surface 15 moves the stopper ring 13 at the engagement position to the release position when the hammer member 12 slides backward by a predetermined distance with respect to the main body 11.

  The caulking machine 10 also includes a ring holder 18 that holds the stopper ring 13 so as to be movable in the vertical direction, a biasing spring 19 that biases the stopper ring 13 downward toward the engagement position, and a stopper ring 13 that is hammered. A return spring 20 for urging the member 12 backward is further provided.

  The cam surface 15 is an inclined surface that is inclined with respect to the axial direction. The main body 11 has a support shaft 21 at the front end that is fitted and inserted into the center hole 2E (see FIG. 1) of the bush 2 when the bush 2 is press-fitted. Hereinafter, each part will be described in detail.

  The main body 11 has a divided structure in the present embodiment, and includes a rear cylindrical member 22, a spring case 23, a main shaft 24, a guide member 25, and a press-fit shaft 26 that are sequentially arranged from the rear and are assembled coaxially with each other.

  The rear cylindrical member 22, the spring case 23, and the main shaft 24 are fastened together with bolts 27 (hexagon socket head bolts in the present embodiment) at their central portions and assembled. A female screw 28 to which a male screw shaft such as a fluid pressure cylinder (not shown) is screwed is provided on the rear side of the inner peripheral portion of the rear cylindrical member 22 during press-fitting.

  The spring case 23 has a cylindrical cover portion 29 surrounding the rear end portion of the impact spring 14 formed of a coil spring from the outside in the radial direction on the outer peripheral portion. A substantially lower half portion of the cover portion 29 protrudes forward to form a substantially semi-cylindrical protrusion portion 30, and a cam surface 15 is formed on the inner peripheral side of the front end portion of the protrusion portion 30. Pin press-fit holes 31 extending in the axial direction are formed at both ends in the circumferential direction of the protrusion 30, and rotation restricting pins 32 are press-fitted and fixed in these pin press-fit holes 31 (see FIG. 3). As will be understood later, the rotation restricting pin 32 restricts the rotation of the ring holder 18 around the axis.

  The main shaft 24 has a shaft center hole 33 opened on the front end surface thereof, and a pin press-fitting hole 34 is provided in the main shaft 24 so as to be orthogonal to the shaft center hole 33.

  The press-fit shaft 26 has the above-described support shaft 21 at the front portion thereof, a fixed shaft 35 at the rear portion thereof, and a pressing flange portion 36 between the support shaft 21 and the fixed shaft 35. The aforementioned pressing surface 16 is formed by the front end surface of the pressing flange portion 36.

  The fixed shaft 35 is inserted into the guide center hole 37 of the guide member 25 from the front, and then inserted into the shaft center hole 33 of the main shaft 24 from the front. A hollow fixing pin 38 is press-fitted into the pin press-fitting hole 34 of the main shaft 24 and the pin press-fitting hole 39 of the fixed shaft 35 in a penetrating state. Thereby, the main shaft 24, the guide member 25, and the press-fit shaft 26 are assembled | attached mutually coaxially.

  The bolt 27 and the fixing pin 38 are detachable. By removing them, the main body 11 and thus the caulking machine 10 can be disassembled. As a result, if any one of the components is damaged, it can be replaced. In particular, when the press-fit shaft 26 used for repeated press-fitting and the claw 17 of the hammer member 12 used for repeated press-fitting are worn or damaged, they can be easily replaced.

  The hammer member 12 has a plurality (three in the present embodiment) of hammer arms 40 extending in the forward direction at equal intervals in the circumferential direction. The above-mentioned claw 17 is integrally formed on the front end surface of the hammer arm 40 and on the entire inner peripheral edge. Further, the hammer member 12 has a hammer cylindrical portion 41 that is coaxially and slidably fitted to the outside of the main shaft 24 at the rear portion thereof.

  FIG. 6 shows a cross-sectional shape of the claw 17 (a VI-VI cross-sectional view of FIG. 3). The claw 17 has a triangular cross-sectional shape. The claw 17 includes a claw front end surface 17A extending from the inner peripheral edge 40A of the hammer arm 40 to the front end surface 40B of the hammer arm 40 at a predetermined angle θ and extending radially outward and forward, and the radius of the front end surface 17A. A claw outer peripheral surface 17C extending perpendicularly to the front end surface 40B from a claw ridge 17B located on the outer side and the front side in the direction. According to this, at the time of caulking, the claw ridge 17B can be effectively bited into the inclined chamfered portion 4A, and caulking can be performed efficiently. But the cross-sectional shape of the nail | claw 17 is arbitrary and is not limited to such a cross-sectional shape. The front end surface 40B of the hammer arm 40 is perpendicular to the longitudinal central axis C.

  3-5, since three hammer arms 40 extending forward are provided at equal intervals in the circumferential direction, the guide member 25 has notches 42 that allow the hammer arms 40 to pass in the axial direction. Three are provided at intervals. Since the guide member 25 is fixed to the main shaft 24, the relative rotation of the hammer member 12 with respect to the main shaft 24 is thereby restricted. In other words, the hammer member 12 is restricted by the guide member 25 from relative rotation with respect to the main shaft 24 and thus the main body 11, and is guided only in the axial movement.

  Similarly, the flange portion 36 of the press-fit shaft 26 is also provided with three notches 43 that allow the hammer arm 40 to pass in the axial direction at equal intervals in the circumferential direction. In order to allow the entire circumference of the bush 2 to be pressed, the pressing surface 16 is left inside the notch 43 in the radial direction. However, the bush 2 may be pressed at three locations in the circumferential direction without leaving the pressing surface 16 inside the notch 43 in the radial direction. In the illustrated example, the maximum outer diameter of the flange portion 36 is made larger than the outer diameter of the bush 2, but it may be made equal to the outer diameter of the bush 2.

  In the axial direction, a ring holder 18 is disposed on the rear side of the hammer member 12, and a striking spring 14 is disposed on the rear side of the ring holder 18. A return spring 20 is disposed between the hammer member 12 and the ring holder 18, and the ring holder 18 is sandwiched between the striking spring 14 and the return spring 20. The stopper ring 13 is held in the ring holder 18 so as to be slidable in the vertical direction. The urging spring 19 is attached to the upper surface portion of the ring holder 18 and urges the upper end portion of the urging spring 19 to be pushed down.

  As shown also in FIG. 7, the ring holder 18 integrally includes a holder main body 51 and a holder cylindrical portion 52 that protrudes forward from the holder main body 51. The holder main body 51 has a holder fitting hole 53 that can be fitted to the outside of the hammer cylindrical portion 41 of the hammer member 12 at the center thereof. The inner diameter D1 of the holder fitting hole 53 is substantially equal to or slightly larger than the outer diameter d of the hammer cylindrical portion 41. Further, the inner diameter D2 of the holder cylindrical portion 52 is larger than the inner diameter D1 of the holder fitting hole 53, and the rear end portion of the return spring 20 made of a coil spring fitted and arranged outside the hammer cylindrical portion 41 is connected to the hammer cylindrical portion 41. The holder is held between the cylindrical portions 52. At the same time, the return spring 20 fitted and disposed outside the hammer cylindrical portion 41 holds the holder cylindrical portion 52 and thus the ring holder 18 at a position coaxial with the hammer cylindrical portion 41.

  The holder main body 51 has a slit 54 formed so as to penetrate in the vertical direction, and the stopper ring 13 is slidably held in the slit 54 in the vertical direction.

  The stopper ring 13 is a circular ring-shaped member having an outer peripheral surface 57 and an inner peripheral surface 58. The stopper ring 13 is inserted into the slit 54 such that the ring center axis C1 is parallel to the longitudinal center axis C. The stopper ring 13 is slidably supported on the inner wall surface of the slit 54 by its front and rear surfaces and right and left side surfaces so that the ring center axis C1 can slide up and down while maintaining a state parallel to the longitudinal center axis C. It has become. Ring flat surfaces 55 extending in the vertical direction are formed on the left and right side surfaces of the stopper ring 13, and these ring flat surfaces 55 are in sliding contact with holder flat surfaces 56 formed on the left and right inner wall surfaces of the slit 54. Thereby, the stopper ring 13 is smoothly guided in the vertical direction without rotating in the ring holder 18. Chamfered portions 57A and 57B for facilitating insertion into the slit 54 are formed at the front and rear edge portions of the stopper ring outer peripheral surface 57 (see FIG. 8A).

  It should be noted that the inner diameter D3 of the stopper ring 13 is substantially equal to or slightly larger than the outer diameter d of the hammer cylindrical portion 41. In the present embodiment, the inner diameter D3 of the stopper ring 13 is made equal to the inner diameter D1 of the holder fitting hole 53.

  The stopper ring 13 is movable in the vertical direction between a lower engagement position as shown in FIG. 8B and an upper release position as shown in FIG. 9A, for example. When the stopper ring 13 is in the engagement position, the stopper ring 13 is eccentrically arranged so that the ring center axis C1 is located substantially below the longitudinal center axis C, and engages with the rear end 41E of the hammer cylindrical portion 41. To do. As a result, even if the stopper ring 13 receives a relatively strong forward load or spring force from the impact spring 14, the stopper ring 13 is prevented from being fitted to the outside of the hammer cylindrical portion 41.

  On the other hand, when the stopper ring 13 is in the release position, the stopper ring 13 is coaxially disposed so that the ring center axis C1 is substantially coaxial with the longitudinal center axis C, and the engagement with the hammer cylinder rear end 41E is released. And can be fitted to the outside of the hammer cylindrical portion 41. As a result, the stopper ring 13 receives a forward load from the impact spring 14, can be fitted to the outside of the hammer cylindrical portion 41, and can slide forward on the hammer cylindrical portion 41.

  Although omitted in FIGS. 5 and 7, the biasing spring 19 is fixed to the upper surface portion and the left and right center portion of the holder main body 51 by a hexagon socket head bolt 59. In this embodiment, the urging spring 19 is a plate spring, and its base end is fixed by a bolt 59, and its tip end faces the slit 54 and abuts against the stopper ring outer peripheral surface 57. A downward projecting portion 60 that is in contact with the upper end of the stopper ring outer peripheral surface 57 is integrally formed at the tip of the biasing spring 19. The biasing spring 19 always pushes the stopper ring 13 downward toward the engagement position with a relatively weak spring force.

  The striking spring 14 has a relatively strong spring force, and is composed of a coil spring formed by spirally winding spring steel having a square cross section. The striking spring 14 is fitted and disposed outside the main shaft 24 in the radial direction, and is disposed at a position between the ring holder 18 and the spring case 23 in the axial direction. When the impact spring 14 is compressed, the stopper ring 13 is urged strongly forward in the axial direction, that is, in the press-fitting direction and the caulking direction via the ring holder 18, and applies a forward load to the stopper ring 13. The striking spring 14 may be manufactured using a spring for a metal press machine.

  According to the above-described configuration, the ring holder 18 may rotate around the axis. Therefore, a pair of left and right rotation restricting pins 32 are provided protruding forward from the spring case 23 for the purpose of restricting this rotation. The rotation restricting pin 32 is disposed in the vicinity of the left and right lower surface portions of the ring holder 18 and restricts the rotation when the ring holder 18 is about to rotate.

  The cam surface 15 is formed on the inner peripheral side of the front end portion of the protruding portion 30 of the spring case 23. As shown in FIG. 8A, the cam surface 15 is an inclined surface inclined at a predetermined angle α with respect to the axial direction. In particular, the cam surface 15 is composed of a tapered surface whose front side has a larger diameter than the rear side.

  As shown in FIGS. 8B and 9A, the cam surface 15 raises the stopper ring 13 from the lower engagement position to the upper release position when the stopper ring 13 is pressed rearward thereto. It is configured to move. During this movement, the chamfered portion 57B on the rear side of the stopper ring 13 comes into surface contact with the cam surface 15, so that the movement can be performed smoothly.

  Next, the operation of the caulking machine 10 and the press-fitting caulking method using the caulking machine 10 will be described.

  FIG. 8A shows the caulking machine 10 in an initial state before press-fitting caulking. As shown in the figure, the hole 3 of the housing cylindrical portion 1 is disposed sideways, and accordingly, the caulking machine 10 is also disposed sideways toward the hole 3 coaxially with the hole 3. The bush 2 is attached to the front end portion of the caulking machine 10 in advance. The caulking machine 10 is connected to a fluid pressure cylinder (for example, a hydraulic cylinder) as a drive source (not shown), and is moved forward by the fluid pressure cylinder. Thus, since the crimping machine 10 is moved by a fluid pressure cylinder much smaller than a general press machine, the equipment can be greatly simplified.

  The bush 2 is fitted around the support shaft 21 of the press-fit shaft 26, and the rear end thereof is in contact with the pressing surface 16 of the press-fit shaft 26. A fluid pressure cylinder (not shown) or a male screw shaft of a member connected thereto is fastened and fixed to the female screw 28 (FIG. 4) of the rear cylindrical member 22 of the caulking machine 10.

  In this initial state, the impact spring 14 has a natural length or a free length that is not substantially compressed, and the return spring 20 is lightly compressed to press the ring holder 18 against the impact spring 14. The stopper ring 13 is positioned at the lower engagement position by the urging force of the urging spring 19 and its own weight.

  The bush 2 is shown as a state immediately before press-fitting. At this time, the bush 2 is positioned so that the axial position of the front end thereof coincides with the axial position of the rear end of the hole 3, and only the portion of the support shaft 21 protruding forward from the bush 2 is inserted into the hole 3. . The claw 17 of the hammer member 12 is brought into contact with the peripheral portion 4 (the chamfered portion 4A) of the hole 3. The hammer member 12 is pushed forward by the return spring 20 on the main shaft 24, and the front end surface 12 </ b> A between the hammer arms 40 is in the foremost position where it contacts the rear end surface 25 </ b> A of the guide member 25.

  At this time, the main body 11 is at the reference position P1. The axial distance L between the guide member 25 and the peripheral portion 4 is L1, and the axial distance M between the front end of the hammer cylindrical portion 41 of the hammer member 12 and the ring holder 18 is M1.

  Next, as shown in FIG. 8B, when the main body 11 receives the forward driving force F from the fluid pressure cylinder and moves forward to the position P2, the bush 2 is pushed by the pressing surface 16 and the main body 11 The hole 3 is press-fitted into the hole 3 by a length equal to the amount of movement (P2-P1, where the front is positive). Since the press-fitting is performed in a state where the bush 2 is supported by the support shaft 21 from the inside in the radial direction, it is possible to reliably prevent the bush 2 from being crushed or deformed during the press-fitting.

  On the other hand, since the relative position of the hammer member 12 with respect to the housing cylindrical portion 1 does not change, the hammer member 12 is relatively moved backward with respect to the main body 11 by a distance equal to the movement amount (P2-P1).

  Then, the hammer member 12 compresses and retracts the return spring 20 in the axial direction, and directly pushes the portion of the stopper ring 13 positioned in the holder fitting hole 53 of the ring holder 18 to the rear. The impact spring 14 is compressed and contracted in the axial direction via the main body 51.

  At this time, the stopper ring 13 is still in the engaged position and is engaged with the rear end 41E of the hammer member 12. The chamfered portion 57 </ b> B on the rear side of the stopper ring 13 starts surface contact with the cam surface 15. Thereafter, the holder main body 51 of the ring holder 18 slides on the inner peripheral surface of the protruding portion 30 of the spring case 23.

  At this time, the axial distance L between the guide member 25 and the peripheral portion 4 is shorter L2, and the axial distance M between the front end of the hammer cylindrical portion 41 and the ring holder 18 is also shorter M2.

  Next, as shown in FIG. 9A, when the main body 11 is further moved forward to reach the position P3, the bush 2 is further press-fitted into the hole 3 by a length equal to the movement amount (P3-P2). The The bush 2 is in a state where almost the entire length thereof is press-fitted into the hole 3.

  On the other hand, since the relative position of the hammer member 12 with respect to the housing cylindrical portion 1 is not changed, the hammer member 12 is further moved backward relative to the main body 11 by a distance equal to the movement amount (P3-P2).

  Then, the hammer member 12 pushes the portion of the stopper ring 13 positioned in the holder fitting hole 53 of the ring holder 18 further directly rearward. Then, the stopper ring 13 slides and rises on the cam surface 15 while deforming the biasing spring 19 in the counter-biasing direction, and moves to the release position as shown in the figure.

  At this time, the striking spring 14 is pushed by the holder body 51 of the ring holder 18 and compressed and contracted in the axial direction until just before the stopper ring 13 moves to the release position. Although the axial distance L between the guide member 25 and the surrounding portion 4 is even shorter L3, the axial distance M between the front end of the hammer cylindrical portion 41 of the hammer member 12 and the ring holder 18 does not change, and M3 = M2. Remains.

  When the stopper ring 13 is moved to the release position, the inner peripheral surface 58 of the stopper ring 13 and the inner peripheral surface of the holder fitting hole 53 of the ring holder 18 are aligned to be in a flush state. Then, the hammer cylindrical portion 41 of the hammer member 12 can slide through them.

  As shown in FIG. 9B, immediately after the stopper ring 13 is moved to the release position, the spring force accumulated in the impact spring 14 is instantaneously released, the impact spring 14 is instantly extended, and the hammer member 12 is moved. Move forward in an instant. The claw 17 of the hammer member 12 strikes the peripheral portion 4 of the hole 3, specifically the chamfered portion 4A. As a result, the caulking at three locations in the circumferential direction ends simultaneously.

  Specifically, immediately after the stopper ring 13 moves to the release position, the stopper ring 13 and the ring holder 18 move forward relatively and instantaneously on the hammer cylindrical portion 41 of the hammer member 12. As a result, the return spring 20 instantaneously contracts to the maximum, and the holder cylindrical portion 52 of the ring holder 18 strikes the hammer member 12 forward. This striking force is transmitted to the hammer member 12, and the claw 17 of the hammer member 12 strikes the chamfered portion 4A. The claw 17 bites into the chamfered portion 4A, and plastically deforms the flesh portion of the chamfered portion 4A located radially inward from the claw 17 inward in the radial direction.

  FIG. 9B shows a state when the chamfered portion 4A is hit. The main body 11 is moved forward by a slight movement amount (P4-P3) from the position P3 to the position P4 between the time when the stopper ring 13 is moved to the release position and the time of hitting. This movement further advances the press-fitting. At the same time as the caulking is finished, the press-fitting is finished, and the supply of the forward driving force F and the forward movement of the main body 11 are stopped. The axial distance M between the front end of the hammer cylindrical portion 41 of the hammer member 12 and the ring holder 18 is M4 = 0.

  After all, from the initial state shown in FIG. 8A, when the hammer member 12 moves backward by a predetermined distance (P3-P1) with respect to the main body 11, the cam surface 15 moves the stopper ring 13 in the engaged position. Move to the release position. At substantially the same time, the hammer member 12 performs caulking by striking. The predetermined distance (P3-P1) is substantially equal to the entire length of the bush 2 or the press-fit length of the bush 2. Therefore, caulking is performed substantially simultaneously with the end of press-fitting of the bush 2.

  For convenience, FIG. 9B shows an example in which the pressing flange portion 36 and the pressing surface 16 of the press-fit shaft 26 have a circular shape slightly smaller in diameter than the bush 2, unlike the above. In this case, as shown in the figure, at the end of press-fitting caulking, the pressing flange portion 36 is partially inserted into the hole 3 and the bush 2 is completely press-fitted into the hole 3. In the illustrated example, the axial distance L between the guide member 25 and the surrounding portion 4 is L4 = 0.

  Thereafter, as shown in FIG. 10, a backward driving force F 'is supplied to the main body 11, and the main body 11 is moved backward to the reference position P1 in the same manner as in the initial state shown in FIG. Then, along with this backward movement, the hammer member 12 is maintained at the same position by the action of the return spring 20, and the stopper ring 13 and the ring holder 18 are relatively rearward on the hammer cylindrical portion 41 of the hammer member 12. Is moved back to the initial state. The stopper ring 13 is moved back to the lower engagement position by the urging force and the own weight of the urging spring 19 at the same time when the stopper ring 13 is disengaged behind the hammer cylindrical portion 41. As a result, the caulking machine 10 is returned to the initial state. Since the caulking has already been completed, the bush 2 remains fixed in the hole 3 even if the press-fit shaft 26 is pulled out from the bush 2.

  Thus, in this embodiment, at the time of press-fitting before caulking, the main body 11 is moved forward with the stopper ring 13 positioned at the engagement position, and the hammer member 12 is moved rearward relative to the main body 11 so that the impact spring 14 Compresses and accumulates striking power. When the hammer member 12 slides backward by a predetermined distance with respect to the main body 11, the stopper ring 13 is moved to the release position by the cam surface 15, and this is used as a trigger to release the accumulated spring force or striking force. The hammer member 12 is instantaneously moved forward and caulked by striking.

  Therefore, it is possible to easily obtain a much more stable fixed amount of caulking (for example, the amount of biting of the nail 17) than a general manual method. Moreover, since this embodiment performs caulking by striking using the spring force accumulated in the striking spring 14, a higher pressure is required compared to a method of slowly caulking with a high static pressure by a general press machine. The caulking can be performed with simpler and smaller equipment. And since the structure of the caulking machine 10 of this embodiment is also simple and simple, it can caulk at low cost as a result.

  Further, in the present embodiment, the caulking machine 10 is also for press-fitting the bush 2 into the hole 3, and the main body 11 has a pressing surface 16 that presses the bush 2 forward when the bush 2 is press-fitted at the front end. ing. For this reason, the press-fitting before caulking can be performed by the caulking machine 10, and both the press-fitting and caulking can be continuously performed by one forward operation of the caulking machine 10. Therefore, workability can be greatly improved.

  In the present embodiment, since the ring holder 18 that holds the stopper ring 13 so as to be movable in the vertical direction is provided, the stopper ring 13 can be moved up and down while the attitude of the stopper ring 13 is stably held when the caulking machine 10 is operated. Can be moved. That is, the ring center axis C1 of the stopper ring 13 can be prevented from being inclined or wobbling with respect to the longitudinal center axis C, and the operation of the stopper ring 13 can be stabilized. In this way, it is possible to accurately maintain the timing at which the stopper ring 13 moves to the release position, and thus the timing at which the hammer member 12 starts to advance (fires), and the accurate press-fitting length and the amount of caulking can be stably obtained.

  Further, in this embodiment, since the biasing spring 19 that biases the stopper ring 13 toward the engagement position is provided, the stopper ring 13 is prevented from inadvertently moving to the release position, and stable operation is achieved. Is obtained. Further, when returning to the initial state after caulking, the stopper ring 13 can be automatically returned to the engaged position at the same time when the stopper ring 13 is disengaged behind the hammer member 12. Thereby, workability can be improved.

  In this embodiment, since the return spring 20 for biasing the stopper ring 13 backward with respect to the hammer member 12 is provided, the hammer member 12, the stopper ring 13 and the ring holder 18 are automatically set to the initial state after caulking. It can be restored and workability can be improved.

  In the present embodiment, the cam surface 15 is an inclined surface inclined with respect to the axial direction, so that the stopper ring 13 can be accurately moved to the release position by the cam surface 15 having a simple configuration.

  Further, in this embodiment, since the support shaft 21 fitted and inserted into the center hole 2E of the bush 2 is provided in the main body 11, the bush 2 can be press-fitted while the bush 2 is supported from the inside in the radial direction. The crushing and deformation of the bush 2 during press-fitting can be reliably suppressed.

  In the present embodiment, since the chamfered portion 4A that is very close to the hole 3 is caulked in the peripheral portion 4 of the housing cylindrical portion 1, caulking can be performed efficiently with a small caulking amount and a striking load. This is very advantageous for simplification of the caulking machine 10.

  As mentioned above, although embodiment of this invention was described in detail, embodiment of this invention is not restricted to the above-mentioned basic embodiment, The following various modifications are possible.

  (1) For example, various modifications in which the above-described basic embodiment is simplified are possible. For example, the ring holder 18 may be omitted if the stopper ring 13 can be accurately held and guided. Further, the biasing spring 19 may be omitted if the stopper ring 13 can be stably held in the engaged position. If the stopper ring 13 and the ring holder 18 can be returned to the initial state by any means (including manual operation) after caulking, the return spring 20 may be omitted.

  (2) The caulking machine according to the present invention does not necessarily have a press-fitting function. That is, the bush 2 may have only a function of caulking the peripheral portion 4 of the hole 3 into which the desired length is press-fitted. In this case, the pressing surface 16 used for press-fitting and thus the press-fitting shaft 26 can be omitted. However, since the center positioning (centering) of the caulking machine 10 can be performed by the press-fit shaft 26, it is preferable that the press-fit shaft 26 is provided.

  (3) The first part press-fitted into the hole may not be the bush 2 and may not be cylindrical. The outer shape, cross-sectional shape, structure, etc. of the first component are arbitrary. For example, the first part may be a sphere, a solid shaft, a disk, or the like.

  (4) Similarly, the shape of the hole of the second part into which the first part is press-fitted is arbitrary, and may not be circular. The caulking location in the peripheral portion of the hole is not limited to the chamfered portion 1A described above, and may be a location on the radially outer side. The second part is not limited to the mission housing, and may be various parts.

  (5) The types of the impact spring 14, the biasing spring 19, and the return spring 20 can be changed. For example, the striking spring 14 and the return spring 20 can be formed from a leaf spring, and the biasing spring 19 can be formed from a coil spring. One end of the impact spring 14 may be fixed to the main body 11, and one end of the return spring 20 may be fixed to the hammer member 12.

  (6) The shape of the stopper ring 13 can be arbitrarily changed. For example, the outer shape of the stopper ring 13 may be a polygon such as a quadrangle. If possible, the stopper ring 13 may be a C-shaped ring.

  (7) The number of caulking locations and the number of claws 17 is not limited to three, and the number is arbitrary. For example, it can be two or four.

  (8) The caulking machine is not limited to landscape orientation and can be used in any posture. For example, it is possible to use a caulking machine arranged vertically downward in accordance with a hole arranged vertically upward.

  The embodiment of the present invention is not limited to the above-described embodiment, and includes all modifications, applications, and equivalents included in the concept of the present invention defined by the claims. Therefore, the present invention should not be construed as being limited, and can be applied to any other technique belonging to the scope of the idea of the present invention.

DESCRIPTION OF SYMBOLS 1 Housing cylindrical part 2 Bushing 2E Center hole 3 Hole 4 Peripheral part 10 Caulking machine 11 Main body 12 Hammer member 13 Stopper ring 14 Impact spring 15 Cam surface 16 Pressing surface 17 Claw 18 Ring holder 19 Energizing spring 20 Return spring 21 Support shaft

Claims (8)

A caulking machine for caulking the peripheral part of the hole of the second part into which the first part is press-fitted,
A main body extending from the rear to the front in the axial direction;
A hammer member disposed on the main body so as to be slidable in the axial direction, and having a claw for hitting the peripheral portion when the peripheral portion is caulked at a front end portion;
An axial direction between an engagement position that is disposed on the outer peripheral side of the main body adjacent to the rear of the hammer member and engages the hammer member and a release position in which the engagement with the hammer member is released. A stopper ring movable in a direction perpendicular to
A striking spring for applying a forward load to the stopper ring;
A cam surface that is provided on the main body and moves the stopper ring, which is in the engagement position, to the release position when the hammer member slides backward by a predetermined distance with respect to the main body;
A caulking machine characterized by comprising: The caulking machine is for press-fitting the first part into the hole of the second part;
The caulking machine according to claim 1, wherein the main body has a pressing surface that presses the first component forward when the first component is press-fitted at a front end portion. The caulking machine according to claim 1, further comprising a ring holder that holds the stopper ring so as to be movable in a direction perpendicular to the axial direction. The caulking machine according to any one of claims 1 to 3, further comprising a biasing spring that biases the stopper ring toward the engagement position. The caulking machine according to any one of claims 1 to 4, further comprising a return spring for urging the stopper ring backward with respect to the hammer member. The caulking machine according to any one of claims 1 to 5, wherein the cam surface is an inclined surface inclined with respect to an axial direction. The said 1st component is cylindrical shape, The said main body has the support shaft fitted and inserted in the center hole of the said 1st component at the time of the press injection of the said 1st component. The caulking machine according to any one of 6. The caulking machine according to any one of claims 1 to 7, wherein the first part is a bush.

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