JP4084540B2 - Method for connecting ball stud and lever member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, a connecting hole of a lever member is fitted into a stud portion having a flange portion at an intermediate portion of a ball stud coupled with a ball socket, and one side surface thereof is brought into contact with the flange portion, and the connection The present invention relates to an improved ball stud and lever member coupling method that forms an enormous end portion that firmly clamps the lever member in cooperation with the flange portion by caulking the end portion of the stud portion protruding outward from the hole. .
[0002]
[Prior art]
In the conventional ball stud and lever member coupling method, as shown in FIG. 7, first, the ball portion 11a of the ball stud 11 coupled to the ball socket 10 is moved from the side opposite to the stud portion 11b to the jig base. Is supported by a load receiving jig 032 fixed to 30, and then the connecting hole 21 of the lever member 1 is fitted into the stud portion 11 b so that the lever member 1 is brought into contact with the flange portion 16 at the intermediate portion of the stud portion 11 b. and then, while pressing the crimping punch 38 to the upper end of the stud portion 11b protruding above the connecting hole 21, providing the punch 38 two precession. By doing so, the stud end 11b is formed with an enormous end portion 22 that firmly holds the lever member 1 in cooperation with the flange portion 16.
[0003]
[Problems to be solved by the invention]
In the conventional method of connecting the ball stud and lever member as described above, the caulking force applied to the stud portion 11b is received by the load receiving jig 032 for supporting the ball portion 11a, so that a large caulking force is applied to the ball portion 11a itself. Therefore, the ball portion 11a may be deformed or scratched, which is not preferable.
[0004]
The present invention has been made in view of such circumstances, and a ball stud and lever member coupling method that enables caulking coupling between a stud portion and a lever member without applying a caulking force to the ball portion. The purpose is to provide.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a connecting hole of a lever member is fitted into a stud portion having a flange portion at an intermediate portion of a ball stud coupled to a ball socket, and one side surface of the stud portion is connected to the flange portion. A ball stud that is brought into contact with a portion and crimps an end portion of the stud portion that protrudes outward from the connection hole to form a massive end portion that firmly clamps the lever member in cooperation with the flange portion; In the lever member coupling method, when the caulking force is applied to the end portion of the stud portion by a caulking punch to form the enormous end portion at the end portion, the flange portion is subjected to a load receiving treatment in order to receive the caulking force. The first feature is to support with a tool. The lever member corresponds to an output arm portion 1a and an operating lever 8 in an embodiment of the present invention described later.
[0006]
According to the first feature, at the time of the caulking coupling of the stud portion to the lever member, the caulking force is received by the load receiving jig via the flange portion to avoid the load on the ball portion or the socket portion. As a result, deformation of the ball portion and the socket portion can be prevented, and the function of the ball joint can be maintained normally.
[0007]
According to the present invention, in addition to the first feature, the heel portion includes a small-diameter heel portion connected to a neck portion of the stud portion to which a waterproof boot is attached via a small-diameter step portion, and a large-diameter ridge portion. A large diameter flange portion connected via a diameter step portion is formed into a stepped shape, and when the caulking force is applied to the end portion of the stud portion by the caulking punch, the large diameter step portion is supported by the load receiving jig. This is a second feature.
[0008]
According to the second feature, the waterproof boot can be mounted between the ball socket and the ball stud before the stud portion and the lever member are caulked and joined, so that the waterproof boot is not disturbed by the lever member. Can be easily mounted without significant deformation of the boot, preventing damage to the waterproof boot and improving the assembly of the ball joint.
[0009]
Further, in addition to the second feature, the present invention fits the outer peripheral surface of the flange portion to the support surface formed on the load receiving jig when the caulking force is applied to the end portion of the stud portion by the caulking punch. The combination is the third feature.
[0010]
According to the third feature, when the stud portion and the lever member are caulked and joined, the load receiving jig exerts the function of stabilizing the ball stud, and the caulking is not performed without using a special anti-rest means. Bonding can be stabilized.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The form of the Example of this invention is demonstrated below based on the Example of this invention shown to an accompanying drawing.
[0012]
FIG. 1 is a side view of a change operating device for a motorcycle according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. 1, and FIG. 3 is a caulking / joining step between a ball stud and a lever member. 4 is a cross-sectional view taken along line 4-4 of FIG. 3, FIG. 5 is a diagram showing a second embodiment of the present invention, a diagram corresponding to FIG. 2, and FIG. 6 is a diagram showing the second embodiment. FIG.
[0013]
First, the first embodiment of the present invention shown in FIGS. 1 and 2 will be described.
[0014]
In FIG. 1, reference numeral F denotes a body frame of a motorcycle, and E denotes an engine. A change pedal 1 is rotatably attached to the vehicle body frame F via a pivot 2, and an engine E is provided with a change spindle 4 that passes through one side wall of the crankcase 3. 4 are connected via the link device 5 of the present invention.
[0015]
The link device 5 is fixed by serration fitting to the output arm 1a formed integrally with the change pedal 1, the first ball joint 6 attached to the output arm 1a, and the outer end of the change spindle 4. And the second ball joint 7 attached to the operation lever 8, and a link 9 connecting the first and second ball joints 6 and 7.
[0016]
Thus, when the operator swings the change pedal 1 upward or downward, the output arm portion 1a pulls or pushes the link 9 accordingly, and the operating lever 8 is rotated backward or forward. As the change spindle 4 rotates, the transmission in the crankcase 3 is shifted up or down.
[0017]
As shown in FIG. 2, the first and second ball joints 6 and 7 have the same structure, and a ball socket 10 having a spherical socket portion 10a at one end and a shank portion 10b at the other end. , A ball portion 11a to be mounted on the socket portion 10a at one end, and a ball stud 11 having a stud portion 11b at the other end. The socket portion 10a has open ports 12 and 13 at both ends, and a cap 14 is caulked and joined to the periphery of one open port 12, and the ball portion 11a is attached to the socket portion 10a from the other open port 13. .
[0018]
In the stud portion 11 b of the ball stud 11, a neck portion 15, a stepped flange portion 16 and a connecting shaft portion 17 are sequentially formed from the ball portion 11 a side, and are formed around the neck portion 15 and the opening 13 of the ball socket 10. Both ends of a bellows-shaped waterproof boot 19 made of an elastic material such as rubber and sealing the opening 13 are fitted to the cylindrical boot mounting portion 18 with a predetermined tightening margin. At that time, the grease 20 for lubrication is filled in the socket portion 10a and the waterproof boot 19.
[0019]
After mounting the waterproof boot 19 between the ball socket 10 and the ball stud 11 as described above, the output arm portion 1a or the operating lever 8 of the corresponding change pedal 1 is connected to the connecting shaft portion 17 of the ball stud 11 as follows. To be fixed. Hereinafter, the output arm portion 1a and the operation lever 8 are collectively referred to as lever members 1a and 8.
[0020]
The stepped heel portion 16 is composed of a small diameter ridge portion 16b connected to the neck portion 15 via a small diameter step portion 16a, and a large diameter ridge portion 16d connected to the small diameter ridge portion 16b via a large diameter step portion 16c. The On the other hand, a connecting hole 21 is provided in the lever members 1 a and 8, and the connecting shaft portion 17 of the ball stud 11 is fitted into the connecting hole 21. Then, by crimping the end portion of the connecting shaft portion 17 that protrudes from the connecting hole 21, a massive end portion 22 that tightly holds the lever members 1 a and 8 in cooperation with the large-diameter flange portion 16 d is formed. The When the caulking is performed, the chamfered portion 21a is formed on the outer peripheral edge of the coupling hole 21 and the enormous end portion 22 is bitten into the chamfered end portion 21a. It is effective.
[0021]
A screw hole 25 is formed in the shank portion 10b of the ball socket 10, and the end of the link 9 is screwed into the screw hole 25, and the effective length of the link 9 is adjusted by adjusting the screwing depth. Thereafter, the shank portion 10b and the link 9 are secured by the lock nut 26.
[0022]
Now, a method for caulking and coupling the connecting shaft portion 17 to the lever members 1a and 8 will be described with reference to FIGS.
[0023]
A pair of opposing load receiving jigs 32 and 33 are slidably attached to the rail 31 on the jig base 30 so as to be able to open and close each other. The opposed end surfaces of these load receiving jigs 32 and 33 are semi-cylindrical support surfaces 34 and 35 that fit the outer peripheral surface of the stepped flange portion 16 of the ball stud 11 when both are closed, and these support surfaces. A recessed portion 37 that accommodates the ball stud 11 and the waterproof boot 19 is formed below 34 and 35. The support surfaces 34 and 35 are provided with step portions 34 a and 35 a that can come into contact with the large-diameter step portion 16 c of the stepped flange portion 16 in the intermediate portion.
[0024]
In the caulking and coupling of the connecting shaft portion 17 to the lever members 1a and 8, first, the ball joints 6 and 7 fitted with the waterproof boot 19 are arranged between the load receiving jigs 32 and 33 in the open state. Then, the load receiving jigs 32 and 33 are closed, and the support surfaces 34 and 35 of the load receiving jigs 32 and 33 are fitted to the outer peripheral surface of the stepped flange portion 16 of the ball stud 11. In this way, the stepped flange portion 16 is sandwiched between the load receiving jigs 32 and 33, and the downward large-diameter step portion 16c is supported by the upward step portions 34a and 35a of the support surfaces 34 and 35.
[0025]
Then, after fitting the connecting hole 21 of the lever member 1a, 8 to the connecting shaft portion 17, while pressing the crimping punch 38 to the upper end portion of the connection shaft portion 17 which projects above the coupling hole 21, the path The precession is given to the punch 38 to form the enormous end portion 22, and the lever members 1a and 8 are pressure-bonded to the upper end surface of the large-diameter flange portion 16d to connect the connecting shaft portion 17 to the lever members 1a and 8 Complete the caulking bond.
[0026]
In this way, at the time of caulking and coupling, the end of the connecting shaft portion 17 is caulked while supporting the stepped flange portion 16 of the ball stud 11 by both load receiving jigs 32 and 33, so that the caulking applied to the connecting shaft portion 17 is performed. The force is received by the load receiving jigs 32 and 33 from the stepped flange portion 16, and does not act on the waterproof boot 19, the ball portion 11a, and the socket portion 10a. Therefore, not only the waterproof boot 19 but also the ball portion 11a and the socket portion 10a are prevented from being deformed, and the functions of the ball joints 6 and 7 can be maintained normally.
[0027]
The support surface 34, 35 of the two load receiving jig 32, 33 is suppressed outer peripheral surface of the stepped collar portion 16 of the stud part 11b, so exhibit bracing function for the ball stud 11, actuation of the crimping punch 38 In the middle, the runout of the ball stud 11 can be prevented, and the caulking connection between the connecting shaft portion 17 and the lever member can be stabilized.
[0028]
Further, since the waterproof boot 19 is mounted between the ball socket 10 and the ball stud 11 before the connecting shaft portion 17 is caulked and joined to the lever members 1 a and 8, the waterproof boot 19 is attached to the lever member, that is, the output arm portion 1 a and the operating lever 8. The waterproof boot 19 can be easily mounted without any significant deformation without being obstructed at all, thereby preventing the waterproof boot 19 from being damaged and improving the assemblability of the ball joints 6 and 7. Will bring.
[0029]
Next, a second embodiment of the present invention shown in FIGS. 5 and 6 will be described.
[0030]
In this second embodiment, both open ports 12 and 13 of the socket 10a of the ball socket 10 are sealed with a bag-type waterproof boot 39 that covers the entire end of the ball socket 10 while tightening the neck 15 of the ball stud 11. Except for the points described above, the configuration is the same as that of the previous embodiment. In the figure, the same reference numerals are assigned to portions corresponding to the previous embodiment, and the description thereof is omitted.
[0031]
Therefore, the caulking coupling structure and the caulking coupling method of the stud portion 11b of the ball stud 11 to the lever members 1a and 8 in this second embodiment are different from the previous embodiment, as is apparent from FIGS. Absent.
[0032]
The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention.
[0033]
【The invention's effect】
As described above, according to the first feature of the present invention, the connecting hole of the lever member is fitted into the stud portion having the flange portion at the intermediate portion of the ball stud coupled to the ball socket, In contact with the flange, caulking the end of the stud protruding outward from the connecting hole, and forming a massive end that firmly clamps the lever member in cooperation with the flange. In the ball stud and lever member coupling method, when the caulking force is applied to the end portion of the stud portion by caulking punch, and the enormous end portion is formed at the end portion, the flange portion is received to receive the caulking force. Because it is supported by the load receiving jig, when the stud is caulked to the lever member, the caulking force is received by the load receiving jig via the collar to avoid the load on the ball or socket. And this Prevents deformation of the ball portion and the socket portion, the function of the ball joint can be maintained properly.
[0034]
Further, according to the second feature of the present invention, in addition to the first feature, the heel portion is connected to the neck portion of the stud portion to which the waterproof boot is attached via a small-diameter step portion. The small diameter flange portion is configured to be stepped with a large diameter flange portion connected via a large diameter step portion, and when the caulking force is applied to the end portion of the stud portion by the caulking punch, the large diameter step portion is Since it is supported by the load receiving jig, it is possible to attach a waterproof boot between the ball socket and the ball stud before the stud portion and the lever member are caulked and joined. The boot can be easily mounted without significant deformation of the boot, preventing damage to the waterproof boot and improving the assembly of the ball joint.
[0035]
Further, according to the third feature of the present invention, in addition to the second feature, when the caulking force is applied to the end portion of the stud portion by the caulking punch, the outer peripheral surface of the flange portion is used as the load receiving jig. Since it is fitted to the formed support surface, the load receiving jig will function as a ball stud steady when the stud part and the lever member are caulked and joined without using a special steady rest. , It can stabilize the caulking bond.
[Brief description of the drawings]
FIG. 1 is a side view of a change operating device for a motorcycle according to a first embodiment of the present invention.
2 is an enlarged sectional view taken along line 2-2 of FIG.
FIG. 3 is a cross-sectional view showing a caulking / bonding step between a ball stud and a lever member.
4 is a cross-sectional view taken along line 4-4 of FIG. 3;
FIG. 5 is a diagram corresponding to FIG. 2, showing a second embodiment of the present invention.
FIG. 6 is a view corresponding to FIG. 3, showing the second embodiment.
FIG. 7 is a cross-sectional view showing a conventional caulking / bonding step between a ball stud and a lever member.
[Explanation of symbols]
1a .... Lever member (output arm part)
6, 8 ... Ball joint 8 ... Lever member (operating lever)
DESCRIPTION OF SYMBOLS 10 .... Ball socket 10a ... Socket part 11 ... Ball stud 11a ... Ball part 11b ... Stud part 16 ...... A collar part (stepped collar part)
16a ... small diameter step 16b ... small diameter flange 16c ... large diameter step 16d ... large diameter flange 17 ... connecting shafts 19, 39 ... waterproof boot 21 ... · coupling hole 22 ... large end portions 32, 33 ... load receiving jig 38 ... crimping punch

Claims (3)

The connecting hole (21) of the lever member (1a, 8) is fitted into the stud part (11b) having the flange part (16) in the middle part of the ball stud (11) coupled with the ball socket (10). Then, one side surface is brought into contact with the flange portion (16), and the end portion of the stud portion (11b) protruding outward from the connection hole (21) is caulked to cooperate with the flange portion (16). In the method of connecting the ball stud and the lever member to form the enormous short part (22) that works to firmly hold the lever member (1a, 8),
When the caulking force is applied to the end portion of the stud portion (11b) by the caulking punch (38) to form the enormous short portion (22) at the end portion, the flange portion (16 ) Is supported by a load receiving jig (32, 33), and the ball stud and lever member are combined.   The ball stud and lever member coupling method according to claim 1, wherein the flange portion (16) is connected to a neck portion (15) of the stud portion (11b) to which a waterproof boot (19, 39) is attached. A small-diameter collar part (16b) connected via the part (16a) and a large-diameter collar part (16d) connected to the small-diameter collar part (16b) via a large-diameter step part (16c) are configured in a stepped manner. When the caulking force is applied to the end of the stud portion (11b) by the caulking punch (38), the large diameter step portion (16c) is supported by the load receiving jig (32, 33). The method of connecting the ball stud and lever member.   The ball stud and lever member coupling method according to claim 2, wherein when the caulking force is applied to the end of the stud portion (11b) by the caulking punch (38), the outer peripheral surface of the flange portion (16) is applied to the load. A ball stud and lever member coupling method characterized by being fitted to support surfaces (34, 35) formed on a receiving jig (32, 33).

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