JPS5812831A - Terminal device of control cable - Google Patents

Abstract

PURPOSE:To fit an outer tube easily and reliably by engaging an elastic coupling piece made of a spring plate with a coupling hub which engages the outer tube of a control cable with a case. CONSTITUTION:When the boss 5 of a hub 1 is pressed on the outside surface of a case s through the fitting hole t of the case s, a gap C is created corresponding to the projection from the groove 4 of a seal 7 between the collar 2 of the hub 1 and the protrusion face 3. Next, when an elastic coupling piece 8 is inserted from above into the coupling groove formed around the boss 5 of the hub 1, the coupling piece 8 is engaged with it while undergoing elastic deformation so as to be flattened, and both upper and lower ends push the inside surface of the case s by means of the elastic restoring force to draw the hub 1 toward the case s side. Accordingly, the seal 7 is crushed and the protrusion face 3 hits the outside surface of the case s.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control cable in which an inner cable is slidably inserted into an outer tube to transmit operating force in both directions or in either direction. Regarding a terminal device that connects the end of an inner cable protruding from an outer tube to a driving member or a driven member, the terminal device is particularly easy to assemble, and is capable of firmly fixing the outer tube to the fixing plate and sealing it. This invention relates to a terminal device that can be easily fixed.

The control cable has an inner cable that slides freely through the outer tube to transmit operating force.
Since the cable can be bent and routed freely, its use is expanding in place of the conventional connecting rod, but this control cable can be used, for example, to connect the operating force between the gear shift lever and the transmission of a car. When used as a transmission member, it is required that the terminal device be assembled quickly and easily, and furthermore, the terminal device on the operating lever side must be inserted into the vehicle interior through the gap with the mounting hole cut through the vehicle body. High sealing performance is required to reliably prevent water, dust, etc. from entering the device, and this requirement is also common in control cable terminal devices other than automobile transmission mechanisms. .

As shown in Fig. 1, a terminal device that satisfies these requirements has a control cable A in which an inner cable b is slidably inserted into an outer tube a, and a center hole d and a center hole d at the end of an outer tube a. Four spherical surfaces connected to e
A flange 'f is formed around one circumference of the tip, and a boss h is formed at the center of the end face g of the flange f.The c2'c is fixed by caulking, and the rear part of the sleeve is fixed. J at the end
The EJ-formed spherical head m is fitted into the four spherical faces θ, and the outer periphery of the boss h is squeezed to form a reduced diameter part j on the inner periphery, and the sleeve k can be freely swung around the spherical head m. In addition, a locking groove j is formed on the outer periphery of the reduced diameter portion 1, and an inner cable b protrudes from the outer tube a.
The end of the inner cable b is inserted into the sleeve through the center hole d of the hub C, and the end of the inner cable b is connected to the rod n which is slidably fitted from the tip to the rear end of the sleeve. A ring-shaped seal V made of an elastic material such as rubber is applied to the end face of f, the boss h of the hub C is passed through the mounting hole t of the case B fixed to the lower surface of the vehicle body r, and the boss h of the hub C is inserted into the locking groove j on the inside of the case. An elastic locking piece U made of a spring steel plate is elastically deformed and locked, and its elastic restoring force pulls the hub C into the case S to form a seal V between the collar f and the case 8.
is clamped to fix the hub C to the case 8 and at the same time prevent water, dust, etc. from entering from the outside of the mounting hole t to the inside.The tip of the rod n is connected to the lower end of the operating lever p by a pin q. However, since the hub C is fixed to the case via a seal V made of an elastic material, all the force for fixing the knob C acts on the seal V. The rocking of the operating lever p causes the rod t'n and the connected inner cable bcass IJ-bk C1) to oscillate around the spherical head m and reciprocate in the axial direction. When the movement occurs, the hub c causes elastic deformation of the seal V due to the frictional resistance between the spherical head In and the spherical four faces θ, the inner circumference of the rod 11 and the sleeve, and the inner cable b and the outer tube b. The kneading may cause shaking and axial vibration, and the kneading may cause abnormal noise at each sliding contact part, adversely affect the operating feeling of the operating lever P, and furthermore, the seal V may fatigue prematurely. It has become clear that this method has drawbacks such as cracking and reduced sealing performance.

The present invention further develops the terminal device shown in FIG. 1 and eliminates the drawbacks of -F.

Hereinafter, some embodiments of the present invention will be sequentially described based on FIGS. 2 to 7.

A first embodiment of the present invention is shown in FIGS. 2-4. The parts whose explanation is omitted have the same configuration as the first example shown in the figure.

In the hub l of this embodiment, a circular groove 4 is formed on the abutting surface 3 of the end face of the collar 2, concentrically with the boss 5, and a seal 7 consisting of an O-ring made of synthetic rubber is partially installed in this groove 4. It is fitted so as to protrude from the abutment surface 3, and when the boss 5 of this hub l is passed through the mounting hole t of the case S and pressed against the outer surface of the case S,
As shown in FIG. 4, a gap C is created between the abutment surface 3 of the flange 2 of the hub 1 and the gap C corresponding to the protrusion of the seal 7 from the bottom 4. The elastic locking piece 8 has the same structure as the elastic locking piece U shown in the example shown in FIG. When inserted from above the retaining groove 6, it is locked while being elastically deformed in the direction of @)F, and due to the elastic recovery pressure, the inner surface of the case S is pushed at both ends of the lower part of -L, and the hook 1 is pushed to the case 8 side. The seal 7 is crushed and the abutment surface 3 abuts against the outer surface of the case 8.

Therefore, when /J is applied to push hub 1 toward nurse S, there is no risk of hub S moving; on the contrary, hub l
When a sword is applied in a direction that moves the case S away from the case S, or when a force that causes the head to swing is applied, the hub 1 moves in the axial direction due to the deformation of the elastic IE piece 8.
Although the elastic restoring force of the elastic locking piece 8 is large enough to crush the seal 7 (2. As shown in the example in Fig. 1, the hub C and the case The movement of the hub 1 is extremely small compared to the case where the sealing material V sandwiched between the hubs S is deformed.

A second embodiment of the invention, shown in FIG.
A lip 17b is formed on the front surface of the outer edge of the ring body 17a in a groove 14 formed on the outer circumference of the metal ring 17.
A synthetic rubber seal 17 fitted with c is fitted, and by elastically deforming and locking the elastic locking piece 8 in the locking groove 16 of the post 15, the elastic restoring force The hub 11 is drawn toward the case 6 side, and the lip 17b of the seal 17 is elastically deformed to expand outward.
The abutment surface 13 of the case abuts against the outer surface of the case, and the effect is the same as that of the first embodiment.

The eighth embodiment of the present invention shown in FIG.
A concave surface 24 is formed inside the end surface 23 of the first case S.
After fitting the seal 27 having a concave cross section to the edge of the mounting hole t, pass the boss 25 of the hub 21 through the center of the seal 27,
Inside the case 8, the washer 29 is fitted into the post 25, and the 4'f locking piece 8 is elastically deformed and locked in the locking groove 26, and the seal 27 is closed by the elastic restoring force. The washer 29 and the hub 21 are pressed against the case 8 to cause elastic deformation, so that the end surface 23 of the flange 22 abuts against the outer surface of the case S. The function and effect of this embodiment are also equivalent to those of the first and second embodiments in IU, but in this embodiment, the seal 27 has a concave cross section and fits into the hole edge of the mounting hole t. This has the advantage of superior sealing properties.

Note that, as in each embodiment f'l of 1-1, the sleeve is freely supported with respect to the hub, and the inner cable is connected to the rod inserted through the sleeve [limited to the terminal device of i]. Instead of a sleeve, the rod is supported so that it can move freely in the C-axis direction and swing relative to the hub, or only in the axial direction, and the inner cable is connected to this. It can also be applied to terminal devices with other structures such as.

As specifically explained in the above-mentioned embodiments, the control cable terminal device of the present invention has an inner pull inserted into the outer tube so as to be freely slidable. A hub having a protruding boss and a locking part formed on the outer periphery is fixed, the boss of the hub is fixed and passed through a mounting hole made transparent in the plate, and one side of the fixing plate is made of a spring plate. Elastic modulus 11
One piece is elastically deformed and locked to the locking portion, and the elastic restoring force of the elastic locking piece causes elastic deformation of the seal provided between the hub and the fixed plate, so that the abutting surface abutting against the other side of the fixing plate, inserting the inner cable into the center hole of the hub, and connecting the end thereof to a rod supported so as to be freely movable in the axial direction with respect to the hub;
The gist is that the rod is connected to a driving member or a driven member, and can be assembled by simply passing the boss of the hub through the mounting hole and locking the elastic stopper to the locking part. In addition, the number depends on the elastic restoring force of the elastic locking piece)
The seal provided between the hub and the fixed plate is elastically deformed so that the abutment surface of the hub abuts against the fixed side.
The seal is stably fixed to the fixed plate, there is little risk of it shaking due to operating force, and there is no excessive load acting on the seal, resulting in the ability to maintain excellent sealing performance over a long period of time. .

[Brief explanation of drawings]

FIG. 1 is a sectional view of a terminal device devised by the inventor before the completion of the present invention, FIGS. 2 to 7 show embodiments of the present invention, and FIG.
The figure is a sectional view of the first embodiment, FIG. 8 is an enlarged exploded perspective view of the main parts, FIG. 4 is an enlarged sectional view of a part of the assembly process, and FIG. 5 is a sectional view of the second embodiment. FIG. 6 is an enlarged sectional view of a part of the assembly during assembly, and FIG. 7 is a sectional view of the eighth embodiment. A: Control a-lunar pull a: Outer tube b:
Inner table 1, 11, 21: Hub 5.15.2
5: Boss 6.16.26° engagement groove (locking part) 7.
17.27: Seal 8: Elastic locking piece S: Case (fixing plate) also. Mounting hole n: Rod p: Operation lever (driving member) Applicant Chuo Spring Co., Ltd. Agent Patent attorney Hiroshi Shuguchi lol! J3v! 4 times

Claims (1)

[Claims] A hub having a boss protruding from the abutment surface of the end face and a locking part formed on the outer periphery is fixed to the end of the fm outer tube of the control cable in which the inner cable is freely inserted into the outer tube, and the hub The boss is passed through a mounting hole provided through the fixing plate, and an elastic locking piece made of a spring plate is elastically deformed on one side of the fixing plate to lock it to the locking part. The elastic restoring force of the piece causes elastic deformation of the seal provided between the hub and the fixing plate to abut the MiJ abutting surface against the other side of the fixing plate, and the inner cable is inserted into the center hole of the hub. A terminal device for a control cable, characterized in that the terminal is inserted through the hub and connected to a rod that is supported to move freely in the axial direction with respect to the hub, and the rod is connected to a driving member or a driven member.