JP2008267392A - Control cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control cable capable of reducing sliding resistance between an outer casing inner peripheral surface and an inner cable outer peripheral surface, with reduced backlash. <P>SOLUTION: The control cable 1 comprises the cylinder shaped outer casing 2 and the inner cable 3 having a core wire 30 reciprocally inserted into the outer casing 2 and extending axially, and a group of side-wires 31 comprising two or more kinds of side-wires 310, 311 wound around the core wire 30 as well as having mutually different diameters. Out of two or more kinds of the side-wires 310, 311 having the different diameters, the side-wires 310 having the maximum diameter sliding on the inner peripheral surface of the outer casing 2 are disposed almost at equal intervals in the circumferential direction in the cross section in the axial longitudinal direction of the inner cable 3, and made of stainless steel. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a control cable used for, for example, a gear change of a transmission.

  The control cable is arranged, for example, between a shift lever and a transmission lever of an automatic transmission. The control cable includes an outer casing and an inner cable. The inner cable is inserted into the cylindrical outer casing so as to be slidable in the axial direction.

  Control cables are often routed in a curved manner so as to sew between various devices. By pulling the other axial end of the inner cable while fixing one axial end of the curved control cable, the inner cable can be moved in the axial direction by a slight amount. The amount of movement of the inner cable increases as the clearance (diameter difference) between the inner peripheral surface of the outer casing and the outer peripheral surface of the inner cable increases. Further, the amount of movement of the inner cable increases as the total bending angle in the control cable routing path increases. The amount of movement is called backlash. Even if the operation side end of the inner cable is pushed and pulled, if the amount of pushing and pulling is less than the backlash, the operation side end of the inner cable does not move. In other words, the greater the backlash, the greater the play (play) when operating the inner cable.

Here, in order to improve operability, the backlash may be reduced. That is, the clearance between the outer casing inner peripheral surface and the inner cable outer peripheral surface may be reduced. However, when the clearance is reduced, the sliding resistance between the outer circumferential surface of the outer casing and the outer circumferential surface of the inner cable is increased accordingly. When the sliding resistance increases, the load transmission loss from the operation side to the operation side increases, and the desired load efficiency (= operation side output load / operation side input load × 100 (%)) may not be ensured.
JP 2000-314416 A JP 2003-287018 A

  Thus, the control cable has two conflicting needs to reduce the sliding resistance between the inner peripheral surface of the outer casing and the outer peripheral surface of the inner cable while reducing the backlash. In view of this point, Patent Document 1 introduces a control cable in which the shape and material of the outer casing liner are improved. The liner constitutes the innermost peripheral layer of the outer casing and is in sliding contact with the inner cable. The cross-sectional shape in the axial direction of the liner described in Patent Document 1 has a hexagonal shape. On the other hand, the inner cable includes a single core wire and a large number of side wires. A large number of side wires have the same diameter and are wound around the core wire. The cross-sectional shape of the inner cable in the axial direction is circular as a whole. For this reason, the sliding contact area between a liner inner peripheral surface and an inner cable outer peripheral surface is small. The liner is made of PTFE (polytetrafluoroethylene).

  According to the control cable described in Patent Document 1, the sliding contact area between the inner peripheral surface of the liner (that is, the inner peripheral surface of the outer casing) and the outer peripheral surface of the inner cable is small, and the liner is made of PTFE. For this reason, even if the clearance between the inner peripheral surface of the outer casing and the outer peripheral surface of the inner cable is reduced to about 0.05 mm to 0.15 mm, an increase in sliding resistance can be suppressed. That is, the sliding resistance can be reduced while reducing the backlash.

  Patent Document 2 introduces a control cable in which the shape of the inner cable is improved. The inner cable includes one core wire, five main side lines, and five sub side lines. The main side wire and the sub side wire are wound around the core wire. The main side line and the sub side line are arranged so as to be alternately arranged in the circumferential direction in the cross section in the axial direction. For this reason, the main side line is arranged at the apex position of a regular pentagon surrounding the core line in the axial perpendicular section. On the other hand, the cross-sectional shape in the axial direction of the liner of the outer casing is circular. Therefore, the sliding contact area between the inner peripheral surface of the liner and the outer peripheral surface of the inner cable (specifically, the outer peripheral surface of the five main side lines) is small.

  According to the control cable described in Patent Document 2, since the sliding contact area between the liner inner peripheral surface (that is, the outer casing inner peripheral surface) and the inner cable outer peripheral surface is small, the outer casing inner peripheral surface and the inner cable outer peripheral surface Even if the clearance between them is reduced to about 0.1 mm to 0.4 mm, an increase in sliding resistance can be suppressed. That is, the sliding resistance can be reduced while reducing the backlash.

  In recent years, however, control cable routing has become increasingly complex. In addition, the control cable routing space is becoming narrower. For this reason, the total bending angle of the routing route tends to increase. Therefore, even with the control cables described in Patent Documents 1 and 2, there is a possibility that the increase in backlash and sliding resistance cannot be sufficiently suppressed.

  The control cable of the present invention has been completed in view of the above problems. Therefore, an object of the present invention is to provide a control cable that can sufficiently reduce the sliding resistance between the inner peripheral surface of the outer casing and the outer peripheral surface of the inner cable while reducing the backlash. .

  (1) In order to solve the above problems, a control cable according to the present invention includes a cylindrical outer casing, a core wire that is reciprocally inserted in the outer casing and extends in the axial direction, and a periphery of the core wire. A control cable comprising: an inner cable having a plurality of types of side wires each having a different diameter and being wound around the outer casing, and the outer casing of the plurality of types of side wires having different diameters. A plurality of the side lines having the maximum diameter in sliding contact with the inner peripheral surface of the inner cable are arranged at substantially equal intervals in the circumferential direction in the cross section in the axial direction of the inner cable and are made of SUS. Corresponding).

  The side line group of the control cable according to the present invention includes a plurality of types of side lines having different diameters. Of the plurality of types of side lines, only the side line with the largest diameter is in sliding contact with the inner peripheral surface of the outer casing. For this reason, the slidable contact area between the inner peripheral surface of the outer casing and the outer peripheral surface of the side wire having the maximum diameter (that is, the inner cable outer peripheral surface) is small. And the side line of the maximum diameter is a product made from SUS. For this reason, the surface is smooth and the sliding resistance between the outer peripheral surface of the outer casing and the outer peripheral surface of the side wire having the maximum diameter (that is, the outer peripheral surface of the inner cable) is small. Therefore, according to the control cable of the present invention, an increase in sliding resistance can be suppressed even if the clearance between the outer peripheral surface of the outer casing and the outer peripheral surface of the inner cable is reduced. That is, it is possible to reduce the sliding resistance while sufficiently reducing the backlash.

  (2) Preferably, in the configuration of (1), a clearance between the inner peripheral surface of the outer casing and a circumscribed circle of the side wire having the maximum diameter is −0.05 mm or more and less than 0.1 mm. It is better to have a configuration (corresponding to claim 2).

  Here, “clearance” refers to a gap width between the inner peripheral surface of the outer casing and the circumscribed circle of the side line with the maximum diameter. That is, the diameter difference between the inner peripheral surface of the outer casing and the circumscribed circle of the side line with the maximum diameter.

  The reason why the clearance is less than 0.1 mm is that the backlash increases when the clearance is 0.1 mm or more. Further, the clearance is set to -0.05 mm or more. When the clearance is less than -0.05 mm, the side wire having the maximum diameter is excessively pressed against the inner peripheral surface of the outer casing, and the sliding resistance is increased. Because.

  (2-1) Particularly preferably, in the configuration of (2), the clearance is preferably 0 mm or less. This will prevent backlash.

  (3) Preferably, in the configuration of (1) or (2), the outer casing includes a liner that is in sliding contact with the side line having the maximum diameter, and the compression elastic modulus of the liner is 200 MPa or more and 1000 MPa or less. It is better to have a configuration (corresponding to claim 3).

  The compression modulus is measured by the test method of ASTM D638. The reason why the compression elastic modulus of the liner is 200 MPa or more is that when it is less than 200 MPa, the control cable is overloaded by force majeure during operation, and the side line of the inner cable may be buried excessively. Further, the reason why the compression elastic modulus of the liner is set to 1000 MPa or less is that when it exceeds 1000 MPa, the liner becomes excessively hard and the sliding resistance between the inner peripheral surface of the outer casing and the outer peripheral surface of the inner cable may increase. Because.

  (4) Preferably, in the configuration of (3) above, the liner is preferably made of PTFE (corresponding to claim 4). The compression elastic modulus of PTFE is about 350 MPa. For this reason, even if the inner cable outer peripheral surface bites into the inner peripheral surface of the liner, for example, in a curved portion of the routing route, the inner peripheral surface of the liner is relatively simple and concave so as to avoid the inner cable outer peripheral surface. Can be transformed into In addition, PTFE has a small friction coefficient. Therefore, sliding resistance can be reduced.

  (5) Moreover, in order to solve the said subject, the control cable of this invention is a cylindrical outer casing, the core wire inserted in this outer casing so that reciprocation is possible, and extending in an axial direction, and this core wire An inner cable having a plurality of types of side wires wound around each other and having different diameters, and among the plurality of types of side wires having different diameters, A plurality of the side lines of the maximum diameter that are in sliding contact with the inner peripheral surface of the outer casing are arranged at substantially equal intervals in the circumferential direction in the cross section in the axial direction of the inner cable. The clearance between the circumscribed circle of the side line of the diameter is not less than −0.05 mm and less than 0.1 mm (corresponding to claim 5).

  Here, “clearance” refers to a gap width between the inner peripheral surface of the outer casing and the circumscribed circle of the side line with the maximum diameter. That is, the diameter difference between the inner peripheral surface of the outer casing and the circumscribed circle of the side line with the maximum diameter.

  The side line group of the control cable according to the present invention includes a plurality of types of side lines having different diameters. Of these plural types of side lines, the side line with the largest diameter is in sliding contact with the inner peripheral surface of the outer casing. For this reason, the slidable contact area between the inner peripheral surface of the outer casing and the outer peripheral surface of the side wire having the maximum diameter (that is, the inner cable outer peripheral surface) is small.

  The reason why the clearance is less than 0.1 mm is that the backlash increases when the clearance is 0.1 mm or more. Further, the clearance is set to -0.05 mm or more. When the clearance is less than -0.05 mm, the side wire having the maximum diameter is excessively pressed against the inner peripheral surface of the outer casing, and the sliding resistance is increased. Because.

  According to the control cable of the present invention, since the sliding contact area between the inner peripheral surface of the outer casing and the outer peripheral surface of the inner cable is small, the sliding resistance can be reduced. Moreover, since the clearance between the inner peripheral surface of the outer casing and the outer peripheral surface of the inner cable is suppressed to −0.05 mm or more and less than 0.1 mm, backlash can be reduced.

  (5-1) Particularly preferably, in the configuration of the above (5), the clearance is preferably 0 mm or less. This will prevent backlash.

  (6) Preferably, in the configuration of (5), the outer casing includes a liner that is in sliding contact with the side line having the maximum diameter, and the compression elastic coefficient of the liner is 200 MPa or more and 1000 MPa or less. Is better (corresponding to claim 6).

  The compression modulus is measured by the test method of ASTM D638. The reason why the compression elastic modulus of the liner is 200 MPa or more is that when it is less than 200 MPa, the control cable is overloaded by force majeure during operation, and the side line of the inner cable may be buried excessively. Further, the reason why the compression elastic modulus of the liner is set to 1000 MPa or less is that when it exceeds 1000 MPa, the liner becomes excessively hard, and the sliding resistance between the inner peripheral surface of the outer casing and the outer peripheral surface of the inner cable may increase. Because.

  (7) Preferably, in the configuration of (6) above, the liner is preferably made of PTFE (corresponding to claim 7). The compression elastic modulus of PTFE is about 350 MPa. For this reason, even if the inner cable outer peripheral surface bites into the inner peripheral surface of the liner, for example, in a curved portion of the routing route, the inner peripheral surface of the liner is relatively simple and concave so as to avoid the inner cable outer peripheral surface. Can be transformed into In addition, PTFE has a small friction coefficient. Therefore, sliding resistance can be reduced.

  According to the present invention, it is possible to provide a control cable that can sufficiently reduce the sliding resistance between the inner peripheral surface of the outer casing and the outer peripheral surface of the inner cable while reducing the backlash sufficiently.

  Hereinafter, an embodiment in which the control cable of the present invention is embodied for automatic transmission operation will be described.

  First, the arrangement of the control cable of this embodiment will be described. FIG. 1 shows a layout diagram of the control cable of the present embodiment. As shown in FIG. 1, the operation side end of the control cable 1 is fixed to the operation side bracket 9a via the operation side cap 4a. Further, the operating side end of the control cable 1 is fixed to the operating side bracket 9b via the operating side cap 4b.

  FIG. 2 shows an enlarged view in a circle II in FIG. As shown in FIG. 2, the operation side bracket 9b is made of steel and includes a U-shaped cutout 90b. The operation side cap 4b has a cylindrical shape. The operation side cap 4b is locked to the notch 90b. The operating side cap 4b has a cable insertion hole 40b extending in the axial direction.

  The control cable 1 of the present embodiment includes an outer casing 2 and an inner cable 3. The outer casing 2 has a cylindrical shape. The operation side end 2b of the outer casing 2 is fixed in the cable insertion hole 40b of the operation side cap 4b. The inner cable 3 has a linear shape. The operating side end 3b of the inner cable 3 passes through the cable insertion hole 40b. A mission lever 91 is connected to the operating side end 3b.

  The configuration of the operation side end of the control cable 1 is the same as the configuration of the operation side end. That is, the operation side end portion of the outer casing 2 is inserted and fixed to the operation side cap 4a locked to the operation side bracket 9a. A shift lever 92 is connected to the operation side end 3 a of the inner cable 3. By pushing and pulling the shift lever 92, the automatic transmission mode can be switched.

  Next, the configuration of the control cable 1 of the present embodiment will be described. FIG. 3 is a perspective sectional view of the control cable of the present embodiment. 4 is a cross-sectional view in the IV-IV direction in FIG. 3 (cross-sectional view in the direction perpendicular to the axis).

  As shown in FIGS. 3 and 4, the outer casing 2 has a three-layer structure including a liner 20, a shield layer 21, and a coat layer 22. The liner 20 corresponds to the innermost layer and has a cylindrical shape. The liner 20 is made of PTFE. The shield layer 21 is made of a hard steel wire wound around the outer peripheral surface of the liner 20. The coat layer 22 is made of resin and covers the outer peripheral side of the shield layer 21.

  The inner cable 3 includes a core wire 30 and a side wire group 31. The inner cable 3 is slidably inserted into the inner diameter side of the liner 20. The core wire 30 is a hard steel wire and extends in the axial direction. The side line group 31 covers the outer peripheral surface of the core wire 30. The side line group 31 includes two types of side lines having different diameters, a large diameter side line 310 and a small diameter side line 311. The large-diameter side wire 310 and the small-diameter side wire 311 are SUS wires having a smooth surface and glossiness. Five large-diameter side wires 310 and five small-diameter side wires 311 are arranged. The large diameter side wire 310 and the small diameter side wire 311 are wound around the outer peripheral surface of the core wire 30. As shown in FIG. 4, the large-diameter side lines 310 and the small-diameter side lines 311 are alternately arranged in the circumferential direction in the cross section perpendicular to the axis. In other words, the large-diameter side line 310 is arranged at approximately every 72 ° at the apex position of a regular pentagon surrounding the core wire 30.

  Next, the dimension of the control cable 1 of this embodiment is demonstrated. The total bending angle of the routing route of the control cable 1 is about 280 °. In addition, the total length of the routing route of the control cable 1 is 1500 mm. The inner diameter (that is, the inner diameter of the outer casing 2) D2 of the liner 20 is 3.0 mm. Moreover, the diameter d1 of the core wire 30 is 1.55 mm. Moreover, the diameter d2 of the large diameter side wire 310 is 0.725 mm. Moreover, the diameter d3 of the small diameter side line 311 is 0.58 mm. The diameter of the circumscribed circle S1 of the five large-diameter side wires 310 (that is, the outer diameter D1 of the inner cable 3) is 3.0 mm.

  That is, the outer diameter D1 of the inner cable 3 and the inner diameter D2 of the outer casing 2 are the same. Therefore, the clearance C (diameter difference) between the inner peripheral surface of the outer casing 2 and the outer peripheral surface of the inner cable 3 is set to zero.

  Next, the effect of the control cable 1 of this embodiment is demonstrated. According to the control cable 1 of the present embodiment, only the large diameter side wire 310 out of the large diameter side wire 310 and the small diameter side wire 311 is in sliding contact with the inner peripheral surface of the liner 20. For this reason, the sliding contact area between the inner peripheral surface of the liner 20 and the outer peripheral surface of the large-diameter side wire 310 (that is, the outer peripheral surface of the inner cable 3) is small. In addition, the large-diameter side wire 310 is a SUS wire having a smooth surface and glitter. For this reason, the sliding resistance between the inner peripheral surface of the liner 20 and the outer peripheral surface of the large-diameter side wire 310 (that is, the outer peripheral surface of the inner cable 3) is small. Therefore, according to the control cable 1 of the present embodiment, it is possible to suppress an increase in sliding resistance even though the clearance between the outer peripheral surface of the outer casing 2 and the outer peripheral surface of the inner cable 3 is zero. it can. That is, backlash can be eliminated and sliding resistance can be reduced.

  The liner 20 is made of PTFE. For this reason, as shown in FIG. 1 above, even if the outer peripheral surface of the large-diameter side line 310 bites into the inner peripheral surface of the liner 20 at the curved portions R1, R2, etc. of the routing route of the control cable 1, In order to avoid the outer peripheral surface of the large-diameter side line 310 that bites in, it can be deformed into a concave shape relatively easily. In addition, PTFE has a small friction coefficient. Therefore, sliding resistance can be reduced.

  The embodiments of the control cable of the present invention have been described above. However, the embodiment is not particularly limited to the above embodiment. Various modifications and improvements that can be made by those skilled in the art are also possible.

  For example, in the above embodiment, the control cable of the present invention is used for automatic transmission operation, but may be used for opening / closing operation of a vehicle door, opening / closing lock operation of a vehicle door, and the like. Moreover, in the said embodiment, although the side line group 31 which consists of the large diameter side line 310 and the small diameter side line 311 was used, you may use the side line group with three or more types of diameters. Moreover, in the said embodiment, although the large diameter side line 310 was arrange | positioned in the vertex position of the regular pentagon surrounding the core wire 30, a regular triangle (three large diameter side lines 310) and a square (four large diameter side lines 310) are arranged. ), Regular hexagons (six large-diameter side lines 310), regular heptagons (seven large-diameter side lines 310), and the like.

  Hereinafter, the evaluation experiment performed with respect to the control cable 1 of the said embodiment is demonstrated, referring FIGS. 1-4.

<Sample>
The configurations of Examples 1 to 4 are the same as the control cable 1 of the above embodiment. Therefore, explanation is omitted here. The clearances C (see FIG. 4) of Examples 1 to 4 are set to 0.2 mm, 0.1 mm, 0 mm, and −0.05 mm, respectively. In addition, what was shown in the above-mentioned FIG. 4 is equivalent to Example 3 with clearance C = 0 mm.

  FIG. 5 shows a cross-sectional view in the axial direction of the control cable of the comparative example. As shown in FIG. 5, the control cable 5 of the comparative example includes an outer casing 6 and an inner cable 7. The outer casing 6 has a cylindrical shape. The outer casing 6 has a three-layer structure including a liner 60, a shield layer 61, and a coat layer 62. The inner cable 7 includes a core wire 70 and a side wire group 71. The side wire group 71 is composed of the same diameter side wires 710 having the same diameter.

  The difference between the control cable 5 of the comparative example shown in FIG. 5 and the control cable 1 of the embodiment shown in FIGS. 1 to 4 is only the configuration and material of the side line group. That is, the side line group 31 of the control cable 1 according to the embodiment includes a large diameter side line 310 and a small diameter side line 311. On the other hand, the side line group 71 of the control cable 5 of the comparative example is composed of only the same-diameter side line 710. Moreover, the side line group 31 of the control cable 1 of an Example is a product made from SUS. On the other hand, the side wire group 71 of the control cable 5 of the comparative example is made of hard steel wire.

  The inner diameter (that is, the inner diameter of the outer casing 6) D2 of the liner 60 is 2.35 mm. Moreover, the diameter d1 of the core wire 70 is 1.6 mm. Moreover, the diameter d4 of the same diameter side line 710 is 0.38 mm. The diameter of the circumscribed circle S2 of the same-diameter side line 710 (that is, the outer diameter D1 of the inner cable 7) is 2.35 mm.

  That is, the outer diameter D1 of the inner cable 7 and the inner diameter D2 of the outer casing 6 are the same. Therefore, the clearance C between the inner peripheral surface of the outer casing 6 and the outer peripheral surface of the inner cable 7 is set to zero.

  The clearances C of Comparative Examples 1 to 3 are set to 0.2 mm, 0.1 mm, and 0 mm, respectively. In addition, what is shown in FIG. 5 is equivalent to the comparative example 3 with clearance C = 0 mm. These Examples 1 to 4 and Comparative Examples 1 to 3 are curvedly arranged between the shift lever 92 and the mission lever 91 as shown in FIG.

<Evaluation items>
The evaluation items are six items of backlash, lever jump, load efficiency, sliding resistance, feeling sensory value, and NV (noise vibration) sensory value. The backlash is evaluated by pushing and pulling the operation side end of the inner cable. The backlash amount is the amount by which the operation side end can be pushed and pulled (shaking in the axial direction) without moving the operation side end.

  Lever jump evaluation is performed by operating the shift lever. Even if the shift lever is switched, it is NG when the mission lever is not switched, and OK when the shift lever is switched and the mission lever is switched.

  For example, when the shift lever is switched from P (parking position) to R (reverse position), the case where the mission lever does not switch from the parking state to the reverse gear is NG, and the case where the mission lever switches from the parking state to the reverse gear is OK. .

  The load efficiency is evaluated by measuring the operating side (shift side) input load and the operating side (mission side) output load of the inner cable. The load efficiency (%) is calculated from an equation of (actuation side output load / operation side input load × 100).

  The sliding resistance is evaluated by measuring the sliding resistance between the inner peripheral surface of the outer casing and the outer peripheral surface of the inner cable. The feeling sensory value is evaluated by the driver judging the feeling of operation when operating the shift lever. A case where the feeling of operation is good is indicated by ◯, a case where it is bad is indicated by ×, and a case where neither can be said is indicated by △.

  The evaluation of the NV sensory value is performed by the driver judging vibration transmitted from the engine room to the driver's palm through the control cable and the shift lever when the engine is driven. The case where the vibration is small is indicated by ◯, the case where the vibration is large is indicated by ×, and the case where neither of the vibrations is possible is indicated by △.

<Evaluation results>
Table 1 shows the evaluation results of each sample.

  As for backlash, as shown in Examples 1 to 3 and Comparative Examples 1 to 3, it can be seen that the smaller the clearance, the smaller the backlash. Further, as shown in Examples 3 and 4, it can be seen that even if the clearance is set to be negative, the backlash does not change from the case of the clearance 0. As for the lever jump, it can be seen that the lever skip does not occur except in Example 1 and Comparative Example 1 where the clearance is large.

  About load efficiency, it turns out that the direction of Example 1- Example 4 has higher load efficiency than Comparative Example 1- Comparative Example 3. For example, even in Example 4 (load efficiency = 75%) having the lowest load efficiency among Examples 1 to 4, Comparative Example 1 (load) having the highest load efficiency among Comparative Examples 1 to 3 It can be seen that the load efficiency is higher than (efficiency = 70%).

  FIG. 6 shows the relationship between clearance and load efficiency. In FIG. 6, a thick line connects the load efficiencies of the first to fourth embodiments. The thin line connects the load efficiencies of Comparative Examples 1 to 3.

  As shown in FIG. 6, it can be seen that in both the example and the comparative example, the load efficiency decreases as the clearance decreases. However, it can be seen that the load efficiency change amount with respect to the clearance change amount is smaller in the example than in the comparative example. That is, it can be seen that the load efficiency is less likely to decrease in the example even if the clearance is set smaller than in the comparative example.

  More specifically, in the comparative example, the inclination of the straight line connecting the comparative example 1 and the comparative example 2 (90 (% / mm) = (70% −61%) / (0.2 mm−0.1 mm)) is compared. The slope of the straight line connecting Comparative Example 2 and Comparative Example 3 (310 (% / mm) = (61% −30%) / (0.1 mm−0 mm)) is suddenly increased. I understand. That is, when the clearance is less than 0.1 mm, it can be seen that the load efficiency is drastically reduced.

  On the other hand, in the example, the slope of the straight line connecting Example 1 and Example 2 (50 (% / mm) = (83% −78%) / (0.2 mm−0.1 mm)) and In comparison, the slope of the straight line connecting Example 2 and Example 3 (20 (% / mm) = (78% −76%) / (0.1 mm−0 mm)), and Example 3 and Example 4 were compared. It can be seen that the slope of the straight line connecting the lines (20 (% / mm) = (76% −75%) / (0 mm − (− 0.05 mm))) is small. That is, it can be seen that when the clearance is less than 0.1 mm, the decrease in load efficiency is reduced.

  About sliding resistance, it turns out that the direction of Example 1- Example 4 is generally lower in sliding resistance than Comparative Example 1- Comparative Example 3. For example, Example 4 (sliding resistance = 11 N) having the highest sliding resistance among Examples 1 to 4 and Comparative Example 1 having the lowest sliding resistance among Comparative Examples 1 to 3 ( Comparison of sliding resistance = 10N) shows that the sliding resistance is different only by 1N.

  FIG. 7 shows the relationship between clearance and sliding resistance. In FIG. 7, the bold line connects the sliding resistances of the first to fourth embodiments. The thin line connects the sliding resistances of Comparative Examples 1 to 3.

  As shown in FIG. 7, it can be seen that in both the example and the comparative example, the sliding resistance increases as the clearance decreases. However, it can be seen that the amount of sliding resistance change with respect to the amount of clearance change is smaller in the example than in the comparative example. That is, it can be seen that the sliding resistance is less likely to increase in the example even if the clearance is set smaller than in the comparative example.

  More specifically, in the comparative example, it is compared with the slope of the straight line connecting the comparative example 1 and the comparative example 2 (−80 (N / mm) = (10N−18N)) / (0.2 mm−0.1 mm)). Then, the slope of the straight line connecting Comparative Example 2 and Comparative Example 3 (= −170 (N / mm) = (18N−35N) / (0.1 mm−0 mm)) is abruptly increased. I understand. That is, it can be seen that the sliding resistance increases drastically when the clearance is less than 0.1 mm.

  In contrast, in the example, the slope of the straight line connecting Example 1 and Example 2 (−30 (N / mm) = (4N−7N) / (0.2 mm−0.1 mm)), The inclination of the straight line connecting Example 2 and Example 3 (−20 (N / mm) = (7N−9N) / (0.1 mm−0 mm)) and the straight line connecting Example 3 and Example 4 It can be seen that the inclination (−40 (N / mm) = (9N−11N) / (0 mm − (− 0.05 mm))) is not significantly different. That is, even if the clearance is less than 0.1 mm, it can be seen that the increase in sliding resistance is small as in the case of the clearance of 0.1 mm or more.

  About feeling feeling value, it turns out that the direction of Example 1- Example 4 has better operation feeling than Comparative Example 1- Comparative Example 3. FIG. As for the NV sensory value, it can be seen that the examples 1 to 4 are less likely to transmit vibration to the driver as a whole than the comparative examples 1 to 3.

It is an arrangement plan of a control cable of one embodiment of the present invention. It is an enlarged view in the circle | round | yen II of FIG. It is a perspective sectional view of the control cable of the embodiment. FIG. 4 is a cross-sectional view in the IV-IV direction of FIG. 3. It is an axial perpendicular direction sectional view of the control cable of a comparative example. It is a graph which shows the relationship between clearance and load efficiency. It is a graph which shows the relationship between clearance and sliding resistance.

Explanation of symbols

1: Control cable.
2: outer casing, 2b: working side end, 20: liner, 21: shield layer, 22: coat layer.
3: inner cable, 3a: operation side end, 3b: operation side end, 30: core wire, 31: side wire group, 310: large diameter side wire, 311: small diameter side wire.
4a: operation side cap, 4b: operation side cap, 40b: cable insertion hole.
5: Control cable.
6: outer casing, 60: liner, 61: shield layer, 62: coat layer.
7: Inner cable, 70: Core wire, 71: Side wire group, 710: Same diameter side wire.
9a: operation side bracket, 9b: operation side bracket, 90b: notch, 91: mission lever, 92: shift lever.
C: clearance, D1: outer diameter, D2: inner diameter, R1: curved portion, R2: curved portion, S1: circumscribed circle, S2: circumscribed circle, d1 to d4: diameter.

Claims (7)

A cylindrical outer casing;
An inner cable having a core wire that is inserted in the outer casing so as to be reciprocable and extends in the axial direction, and a side wire group that is wound around the core wire and includes a plurality of types of side wires having different diameters. When,
A control cable comprising:
Among a plurality of types of the side lines having different diameters, a plurality of the side lines having the maximum diameter that are in sliding contact with the inner peripheral surface of the outer casing are arranged at substantially equal intervals in the circumferential direction in the cross section in the axial direction of the inner cable. A control cable made of SUS.   2. The control cable according to claim 1, wherein a clearance between the inner peripheral surface of the outer casing and a circumscribed circle of the side wire having the maximum diameter is −0.05 mm or more and less than 0.1 mm. The outer casing includes a liner that slidably contacts the side line of the maximum diameter,
The control cable according to claim 1 or 2, wherein the compression elastic modulus of the liner is 200 MPa or more and 1000 MPa or less.   The control cable according to claim 3, wherein the liner is made of PTFE. A cylindrical outer casing;
An inner cable having a core wire that is inserted in the outer casing so as to be reciprocable and extends in the axial direction, and a side wire group that is wound around the core wire and includes a plurality of types of side wires having different diameters. When,
A control cable comprising:
Among the plurality of types of side lines having different diameters, a plurality of the side lines having the maximum diameter that are in sliding contact with the inner peripheral surface of the outer casing are arranged at substantially equal intervals in the circumferential direction in the cross-section in the axial direction of the inner cable. ,
A control cable, wherein a clearance between the inner peripheral surface of the outer casing and a circumscribed circle of the side line having the maximum diameter is −0.05 mm or more and less than 0.1 mm. The outer casing includes a liner that slidably contacts the side line of the maximum diameter,
The control cable according to claim 5, wherein the liner has a compressive elastic modulus of 200 MPa to 1000 MPa.   The control cable according to claim 6, wherein the liner is made of PTFE.

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