JP2009197865A - Terminal supporting device for control cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal supporting device for a control cable, having improved vibration absorbency, shock absorbency and operation responsiveness without degrading its operation feeling. <P>SOLUTION: A locking flange 20 is formed on the outer periphery of a casing cap 15 joined to a terminal portion of a guide tube 14, and an annular storage chamber 21 is formed in a socket 17 to store the locking flange 20. A cap rubber 18 is attached to the locking flange 20 in a closely contacting condition, and a flange attachment portion of the cap rubber 18 is tapered to be gradually narrower toward the outer periphery side of the locking flange 20 in the axial direction. An inner face 21a of the storage chamber 21 opposed to the tapered end face of the flange attachment portion of the cap rubber 18 is formed so that a distance to the tapered end face of the flange attachment portion is gradually wider toward the radial outside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a terminal support device for a control cable for supporting a control cable for transmitting an operating force to an operated portion to a fixed portion on the vehicle body side.

  The control cable that transmits the operation of the shift lever of the vehicle to the transmission is surrounded by a guide tube with an inner cable that connects the rod on the shift lever side and the rod on the transmission side. It is supported by the fixed part. The terminal support portion of the guide tube receives input vibration from the engine side, impact associated with operation, and the like, so the terminal support device incorporates an elastic member for absorbing input vibration, operation impact, and the like ( For example, see Patent Document 1).

In the terminal support device described in Patent Document 1, a flange is formed on the outer periphery of a cylindrical casing cap coupled to the terminal portion of the guide tube, and the casing cap is accommodated in a socket that is attached to the fixing portion on the vehicle body side. A storage chamber is formed, and an elastic member is interposed between the wall of the storage chamber and the flange of the casing cap. The elastic member is formed in the shape of a disc spring and is curved in the radial direction, and is provided on both the front and rear sides of the flange.
In this terminal support device, vibration such as engine vibration is absorbed by the low spring rigidity of the curved elastic member, and when a large load such as an operation impact is input, the elastic member is flattened so that the elastic member is cut into high spring rigidity. Change. Therefore, this makes it possible to achieve both absorption of minute input vibrations, shock absorption and operation response.
JP 2004-84684 A

  However, this conventional terminal support device has a structure in which a low-stiffness first-stage spring characteristic and a high-rigidity second-stage spring characteristic are obtained by a disc spring-like elastic member. Therefore, there is a concern that the operation feeling during the operation of the control cable is lowered.

  Therefore, the present invention is intended to provide a terminal support device for a control cable that can improve vibration absorption and improve shock absorption and operation responsiveness without deteriorating operation feeling. is there.

The invention according to claim 1, which solves the above problem, includes a terminal portion of a guide tube (for example, a guide tube 14 in an embodiment described later) surrounding an inner cable (for example, an inner cable 12 in an embodiment described later). A terminal support device for a control cable (for example, a control cable 4 in an embodiment described later) supported by a fixing portion on the vehicle body side, and a substantially cylindrical casing cap (for example, described later) coupled to the terminal portion of the guide tube Casing cap 15) in this embodiment, a socket (for example, socket 17 in the embodiment described later) attached to the vehicle body side fixing portion while holding the casing cap, and between the socket and the casing cap Interposed elastic member (for example, in an embodiment described later) An annular storage chamber (e.g., a flange (e.g., a locking flange 20 in an embodiment to be described later) formed on the outer periphery of the casing cap and accommodating the flange in the socket. The accommodation chamber 21 in the embodiment described later is formed, and the elastic member is attached to the flange in a close contact state, and the portion of the elastic member attached to the flange is directed toward the outer peripheral side of the flange. The inner surface of the storage chamber (for example, the inner surface 21a in the embodiment described later) facing the tapered end surface of the portion attached to the flange of the elastic member is tapered. It is characterized in that it is formed so that the separation width between the worn portion and the tapered end face increases radially outward.
While the input load is small, only the radially inner region of the part of the elastic member attached to the flange abuts the inner surface of the socket housing chamber so that the elastic member contributes to vibration absorption as a low spring rigidity vibration absorbing member. Become. When the input load increases from this state, the region of the portion attached to the flange of the elastic member that contacts the inner surface of the socket expands radially outward according to the input load. As a result, the spring rigidity of the elastic member gradually increases, and the characteristics for shock absorption and displacement regulation are gradually switched.

According to a second aspect of the present invention, in the control cable terminal supporting device according to the first aspect, the socket accommodating chamber has a gap (for example, described later) on the outer peripheral surface of the portion that adheres to the flange of the elastic member It is characterized by being formed so as to cover with a gap d) in the embodiment.
When the input load increases, the area where the elastic member is crushed and deformed expands outward in the radial direction and the amount of expansion of the elastic member outward in the radial direction also increases. In the stage, it is allowed by the gap with the storage chamber. Further, when the elastic member bulges to the outside in the radial direction to a certain degree or more, the gap gradually disappears, the bulging portion comes into close contact with the inner surface of the storage chamber, and the spring rigidity of the elastic member further increases.

According to a third aspect of the present invention, in the control cable terminal support device according to the first or second aspect, the flange of the casing cap is formed in a tapered shape whose width in the axial direction narrows radially outward. It is characterized by.
Thereby, the site | part with which the flange of an elastic member is mounted | worn can be made into the taper shape which an axial width | variety becomes narrow toward the outer peripheral side of a flange, without changing the axial thickness of an elastic member largely. Therefore, it is possible to sufficiently ensure the axial thickness of the elastic member on the flange tip side.

According to a fourth aspect of the present invention, in the terminal support device for a control cable according to the second aspect, a curved surface that is curved along the axial direction is formed on the outer peripheral portion of the portion that is attached to the flange of the elastic member. It is characterized by.
When the input load increases, the amount of bulging outward of the elastic member in the radial direction increases. At this time, a curved surface that is curved along the axial direction is provided on the outer peripheral portion of the elastic member. It becomes difficult to fill the gaps between the two.

  According to the first aspect of the present invention, while the input load is small, only the radially inner region of the portion attached to the flange of the elastic member abuts on the inner surface of the socket housing chamber, and the input load increases. Of the part attached to the flange of the elastic member, the area that contacts the inner surface of the socket gradually expands outward in the radial direction. The characteristic to the high spring characteristic region can be changed gradually. Therefore, according to the present invention, it is possible to improve operation feeling while ensuring vibration absorption, shock absorption, and operation response.

  According to the second aspect of the present invention, the initial bulging outward of the elastic member in the radial direction due to the increase in the input load can be allowed by the gap between the outer peripheral surface of the elastic member and the storage chamber. The rapid increase in the spring characteristics of the member can be made more gradual. Further, when an excessive load is input, the bulging elastic member disappears the gap, so that it is possible to reliably restrict an excessive displacement of the casing cap.

  According to the third aspect of the present invention, since the flange of the casing cap is formed in a taper shape with the axial width becoming narrower toward the radially outer side, the axial thickness on the front end side of the flange of the elastic member is sufficient. The change in the spring characteristics of the elastic member can be made more gradual.

  According to the fourth aspect of the present invention, since the curved surface curved along the axial direction is formed on the outer peripheral portion of the portion attached to the flange of the elastic member, when the elastic member bulges outward in the radial direction. It is difficult for the gap with the storage chamber to be filled rapidly, and the change in the spring characteristics of the elastic member can be made more gradual.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an operation system on the shift lever 2 side of a transmission 1 to which a terminal support device 10 according to the present invention is applied.
As shown in the figure, the ends of two control cables 4 are supported via a terminal support device 10 on a lever support portion 3 on the vehicle body side that holds the shift lever 2 (a fixed portion on the vehicle body side). One end side of each control cable 4 is connected to the shift lever 2 side, and the other end side is connected to the main body (transmission) side of the transmission 1.

FIG. 2 is a side view in which the lower half of the terminal support device 10 is taken as a cross section.
The control cable 4 is disposed around the inner cable 12 via a liner 13 and an inner cable 12 whose both ends are directly connected to a rod 11 on the shift lever 2 side and a rod (not shown) on the main body side. It comprises a guide tube 14.

  The terminal support device 10 includes a substantially cylindrical casing cap 15 in which the inner cable 12 penetrates the inside and the terminal portion of the guide tube 14 is caulked and fixed to one end, and a rod on the shift lever 2 side coupled to the inner cable 12. A guide pipe 16 that slidably guides the front end of 11, a substantially cylindrical socket 17 that is disposed around the casing cap 15 and the guide pipe 16 to hold both, and is fixed to the lever support 3. A rubber cap rubber 18 (elastic member) interposed between the casing cap 15 and the periphery of the guide pipe 16 and the socket 17 is provided.

  The socket 17 has three socket parts 17a, 17b, and 17c assembled in the axial direction, and a space for holding the casing cap 15, the guide pipe 16, and the cap rubber 18 is provided therein.

  The casing cap 15 is provided with a tube fixing portion 19 on which one end of the guide tube 14 is caulked on one end side in the axial direction, and a substantially disc-shaped locking flange 20 (flange) projecting radially outward on the outer periphery of the center portion. ) Is extended. The locking flange 20 is accommodated in an accommodating chamber 21 provided in an annular shape on the inner periphery of the socket 17, and the tube fixing portion 19 protrudes outward from the axial end of the socket 17.

  The guide pipe 16 is provided with a substantially spherical bulging portion 22 at the tip, and the bulging portion 22 is swingably held in the socket 17 via the cap rubber 18.

  The cap rubber 18 is formed in a substantially cylindrical shape as a whole and is attached in close contact with the outer peripheral surface of the casing cap 15 excluding the tube fixing portion 19, and protrudes from the casing cap 15 and extends in the axial direction. The bulging portion 22 of the guide pipe 16 is fitted to the cylindrical portion 23. In the following description, a portion of the cap rubber 18 that is attached to the locking flange 20 of the casing cap 15 is referred to as a flange-attached portion 18a, and is a portion that is attached to the front and rear shaft portions of the locking flange 20. Is referred to as a shaft-attached portion 18b.

FIG. 3 is an enlarged view of a part of the cross section of the casing cap 15 and the cap rubber 18 together with the cross sectional shape of the socket 17.
As shown in the figure, the locking flange 20 of the casing cap 15 is formed in a taper shape in which the axial width gradually decreases from the root side toward the outer peripheral side, and the flange-attached portion 18a of the cap rubber 18 is engaged. A disk-like raised wall 24 that contacts the taper surfaces of the stop flange 20 in the axial direction is formed thicker than the thickness of the shaft-attached portion 18b, and contacts the outer peripheral surface of the locking flange 20. The top wall 25 is formed to be thinner than the wall thickness of the raised wall 24. The raised wall 24 is formed to have a substantially constant thickness from the base portion side to the outer peripheral side although the thickness of the outermost peripheral portion is slightly thicker, and the outer surface of the raised wall 24 when attached to the locking flange 20. 24 a (end face) is inclined substantially in a taper shape following the cross-sectional shape of the locking flange 20. Further, the top wall 25 has a central portion in the axial direction that bulges to the outside in the radial direction, and its outer peripheral surface 25a is a curved surface that curves in the axial direction.

On the other hand, the inner surface 21a of the storage chamber 21 of the socket 17 that faces the outer surface 24a of the raised wall 24 of the cap rubber 18 is formed along the direction orthogonal to the axis of the socket 17, and the outer surface of the cap rubber 18 side. The separation width with respect to 24a expands radially outward.
Moreover, the inner peripheral surface 21b of the storage chamber 21 that faces the outer peripheral surface 25a of the cap rubber 18 is formed to have a constant inner diameter that is slightly larger than the maximum outer diameter of the outer peripheral surface 25a on the cap rubber 18 side in the axial direction. Has been. Accordingly, a gap d is provided between the inner peripheral surface 21b of the storage chamber 21 and the outer peripheral surface 25a of the cap rubber 18. The gap d is narrowest at the substantially central portion in the axial direction and gradually expands toward both ends. It is like that.

In the above configuration, vibration such as engine vibration transmitted through the guide tube 14 of the control cable 4 is absorbed by the cap rubber 18, thereby blocking input to the socket 17 side (vehicle body side).
At this time, as shown in FIG. 3, the cap rubber 18 is in contact with the socket 17 only at the root portion of the shaft attaching portion 18b and the flange attaching portion 18a. For this reason, the spring rigidity of the flange-attached portion 18a is lowered, and the absorption performance against the input vibration is maintained high.

  Further, when an axial load is input to the casing cap 15 through the guide tube 14 in accordance with the operation of the shift lever 2, the casing cap 15 moves in the axial direction with respect to the socket 17, and the flange of the cap rubber 18. The contact area (collapse area) of the inner surface 21a of the socket 17 with respect to the adherend 18a gradually expands radially outward. During this time, the spring rigidity of the flange-attached portion 18a gradually increases as the contact area increases, and after the inner surface 21a of the socket 17 contacts almost the entire area of the outer surface 24a of the flange-attached portion 18a, shock absorption, Switch to high spring stiffness characteristics with excellent operation response.

FIG. 4 is a view showing a deformed state of the flange-attached portion 18a after switching to the high spring characteristic.
When the inner surface 21a of the socket 17 comes into contact with almost the entire outer surface 24a of the flange-attached portion 18a, the flange-attached portion 18a gradually bulges to the outer peripheral side, and finally, as shown in FIG. The flange adherence portion 18a comes into close contact with the inner peripheral surface 21b of the storage chamber 21 so as to eliminate a part of the gap d.

  In the terminal support device 10, the cap rubber 18 is attached in close contact with the locking flange 20, and the inner surface 21 a of the storage chamber 21 perpendicular to the axial direction is in contact with the tapered outer surface 24 a of the cap rubber 18. The structure allows a gradual switching from the low spring rigidity of the first stage to the high spring characteristics of the second stage, which ensures vibration absorption, shock absorption and operation response by both characteristics. However, it is possible to improve the operational feeling.

In the terminal support device 10, a gap d is provided between the outer peripheral surface 25 a of the flange-attached portion 18 a of the cap rubber 18 and the inner peripheral surface 21 b of the storage chamber 21, and the flange-attached portion is formed by the gap d. Since the bulging of 18a radially outward is allowed, the switching from the low spring stiffness to the high spring stiffness can be made more gradual.
In particular, in this embodiment, since the outer peripheral surface 25a of the flange-attached portion 18a is provided with a curved surface that curves along the axial direction, a gap is formed when the flange-attached portion 18a bulges radially outward. The disappearance of d is delayed, and the switching of characteristics becomes more gradual.

  Further, in this terminal support device 10, since the locking flange 20 itself is formed in a tapered shape, it is not necessary to reduce the thickness of the raised wall 24 of the flange-attached portion 18a toward the outside in the radial direction. This is also advantageous for gradual switching of characteristics.

5 and 6 are cross-sectional views showing the cap rubber 18 when the axial widths W1 and W2 (thicknesses) of the flange-attached portion 18a are changed, and FIG. 7 shows each of the widths W1 and W2 changed. It is the graph which showed the 1st step | paragraph spring characteristic in the case compared with the case of the conventional structure.
As shown in FIG. 7, the first-stage spring characteristics can be arbitrarily changed by changing the axial widths W1, W2 of the flange-attached portion 18a. The first-stage spring characteristics can also be adjusted by changing the inclination angle of the raised wall 24 of the other flange-attached portion 18a.

8 and 9 are sectional views showing the cap rubber 18 when the radius of curvature R1, R2 in the axial direction of the top wall 25 of the flange-attached portion 18a is changed, and FIG. 10 shows the radius of curvature R1, R2. It is the graph which showed the 2nd step | paragraph spring characteristic in each case changed compared with the case of the conventional structure.
As shown in FIG. 10, the second-stage spring characteristics can be arbitrarily changed by changing the curvature radii R1, R2 of the top wall 25 of the flange-attached portion 18a.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

The perspective view of the operating system of the transmission which shows one Embodiment of this invention. The side view which made the lower half of the terminal support apparatus of the embodiment the cross section. The expanded sectional view of the principal part of the embodiment. The expanded sectional view when the load of the principal part of the embodiment is input. Sectional drawing which shows an example of the embodiment. Sectional drawing which shows the other example of the embodiment. The load-displacement characteristic figure in the case of each example of the embodiment. Sectional drawing which shows an example of the embodiment. Sectional drawing which shows the other example of the embodiment. The load-displacement characteristic figure in the case of each example of the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 4 ... Control cable 10 ... Terminal support device 12 ... Inner cable 14 ... Guide tube 15 ... Casing cap 17 ... Socket 18 ... Cap rubber (elastic member)
20 ... locking flange (flange)
21 ... Container 21a ... Inner surface d ... Gap

Claims (4)

A terminal support device for a control cable that supports a terminal portion of a guide tube that surrounds the inner cable to a fixed portion on the vehicle body side,
A substantially cylindrical casing cap coupled to the end of the guide tube;
A socket attached to the vehicle body side fixed portion while holding the casing cap;
An elastic member interposed between the socket and the casing cap,
Forming a flange on the outer periphery of the casing cap;
Forming an annular housing chamber for housing the flange in the socket;
The elastic member is attached to the flange in close contact, and the portion of the elastic member attached to the flange is tapered so that the axial width decreases toward the outer peripheral side of the flange.
The separation width between the inner surface of the storage chamber facing the tapered end surface of the portion attached to the flange of the elastic member and the tapered end surface of the portion attached to the flange increases radially outward. An end support device for a control cable, characterized by being formed as described above.   2. The control cable terminal support device according to claim 1, wherein the socket accommodating chamber is formed so as to cover an outer peripheral surface of a portion attached to the flange of the elastic member with a gap.   3. The control cable terminal support device according to claim 1, wherein the flange of the casing cap is formed in a tapered shape in which a width in an axial direction is narrowed toward a radially outer side. 4.   The terminal support device for a control cable according to claim 2, wherein a curved surface that is curved along the axial direction is formed on an outer peripheral portion of a portion that is attached to the flange of the elastic member.

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