JPH0613384Y2 - Connection member for torque transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Use) The present invention relates to a connecting member for transmitting a torque of a drive shaft to a driven shaft, for example, a damping force control rod of a shock absorber (driven shaft). The present invention relates to a connecting member for connecting a shaft) to an output shaft (driving shaft) of an actuator that is rotationally driven for switching damping force, and a connecting member for other uses having a function similar to this.

(Prior Art) For a concrete understanding, for example, a connecting member of a shock absorber will be described. US Pat. No. 4,702,123
In the specification, an actuator for driving a control rod of a shock absorber is presented. This actuator selectively rotationally drives the control rod of the shock absorber to three positions. In order to ensure the positioning of the rod reliably and accurately, three stoppers are provided, and the stopper arm connected to the output shaft of the actuator collides with one of the stoppers so that one of the three positions is reached. The rotation angle of the output shaft of the actuator is restricted.

Even if there is a slight misalignment between the control rod and the output shaft of the actuator, when the output shaft rotates to drive the control rod in rotation,
The output shaft of the actuator is connected to the control rod via a connecting member so that a force that deforms the shaft center is not applied. A concrete example of this connecting member is Shokai Sho 61.
-188048.

(Problems to be solved by the invention) Even if there is a slight positional deviation between the control rod and the output shaft of the actuator, when the output shaft rotates and the control rod is rotationally driven, the former and the latter have axial centers. The connecting member is connected to both the output shaft of the actuator and the control rod in the rotational direction and can be displaced relative to each other in the radial direction so that the force that deforms is not applied. It has an engaging structure in which the other tenon-shaped projection enters. The connecting member is made of metal so that it will not be deformed or damaged even if a relatively strong force is applied by the actuator, and when the actuator starts driving the control rod, the connecting shaft of the actuator output shaft and the connecting member is A collision sound (a metallic sound) is generated between the control member and the control member.

If the connecting member is made of a soft synthetic resin, such collision noise is reduced, but since a torsional force acts on the connecting member, the connecting member is twisted and deformed or damaged.

An object of the present invention is to reduce a collision noise generated by a connecting member and prevent twisting deformation or damage of the connecting member.

[Constitution of device]

(Means for Solving the Problems) In order to achieve the above-mentioned object, in the present invention, the connecting member is made of a metal cylinder and a synthetic resin molded therein, and further, it slides in the drive shaft and the axial direction and rotates in the rotational direction. An input coupling portion that engages with the driven shaft and an output coupling portion that slides in the axial direction with respect to the driven shaft and engages in the rotation direction are provided.
The input coupling portion has an input side end portion of the metal cylinder for engaging the drive shaft and a synthetic resin portion covering the portion, and the output coupling portion is for engaging the driven shaft. An output side end of the metal cylinder and a synthetic resin portion covering the output side end, and a synthetic resin covering the input side end of the metal cylinder and the output side end of the metal cylinder are provided. The synthetic resin coated with is integrally continuous through the inside of the metal cylinder.

(Operation) Since the input end of the metal cylinder of the connecting member, that is, the engaging portion with the drive shaft is covered with the synthetic resin, the collision noise between the drive shaft and the connecting member is reduced. Further, since the output end of the metal cylinder of the connecting member, that is, the engaging portion with the driven shaft, is covered with the synthetic resin, the collision noise between the connecting member and the driven shaft is reduced.

The synthetic resin covering the input end and the synthetic resin covering the output end of the metal cylinder are integrally continuous and molded in the metal cylinder, that is, the synthetic resin is bonded to the metal cylinder, and Since the inside of the metal cylinder is filled, the connection of the synthetic resin to the metal cylinder is strong, and the force applied to the synthetic resin from the output shaft and the driven shaft of the actuator is substantially generated by the metal cylinder through the synthetic resin. Since it receives and withstands this, there is substantially no deformation or breakage of the connecting member.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

(Embodiment) FIG. 1 shows a longitudinal section of an embodiment of the present invention, and FIG.
The cross section of the actuator shown in Fig. 1 (II-II in Fig. 1
A line cross section) is shown. First, the structure of this actuator will be described. The mandrel 2 is located at the central axis position of the cup-shaped case 1, and the mandrel 2 is fixed to the bottom of the case 1 (upper end surface in FIG. Stands upright toward the opening (downward in FIG. 1) of the case. A rotor 4 is attached to the mandrel 2 via a bearing 3. Bearing 3 of rotor 4
A steel ball 5 is put in the bottom of the hole into which the steel ball 5 has entered, and the steel ball 5 is in contact with the tip (lower end) of the mandrel.

A tooth 4b is cut on the lower end side surface of the rotor 4, and a gear 8 is meshed with the tooth 4b, but the tooth 4b does not exist on the entire circumference of the side surface of the rotor 4. The stopper arm 4a is planted at the position where it does not exist. The rotor 4 constitutes one output shaft (drive shaft) 4A, and the gear 8 constitutes another output shaft (drive shaft) 8A.

The lower end surfaces of the output shafts 4A and 8A, that is, the lower surface of the rotor 4 and the lower surface of the gear 8 have slots into which the upper ends (9a: FIG. 3) of the connecting members 9 and 10 are fitted,
The input coupling portion, that is, the upper end of the connecting members 9 and 10 is inserted into the slot. As a result, when the rotor 4 rotates, the connecting member 9 and the gear 8 rotate. The rotation of the gear 8 causes the connecting member 10 to rotate in the opposite direction to the connecting member 9.

On the side surface of the rotor 4, two permanent magnets 6a and 6b are provided.
Are fixed at positions symmetrical with respect to the axis of the rotor 4. Four magnetic poles are fixed to the magnetic cylinder 7,
Electric coils 7A and 7C (7A to 7D: Fig. 2) on each magnetic pole
Is wound.

When the electric coil 7A is energized, the rotor 4 comes to the rotational position shown in FIG.

When the electric coil 7A is de-energized and the electric coils 7B and 7C are energized when the rotor 4 is in the position, the electric coil 7B attracts the magnet 6b, the electric coil 7C repels the magnet 6a, and the rotor 4 moves. , The permanent magnet 6b approaches the electric coil 7B, the permanent magnet 6a rotates in the direction toward the electric coil 7D, and the stopper arm 4a moves to the base member 1
It stops at the position where it hits the stopper surface 11a of No.1. When reaching the position, the electric coil 7C is de-energized.

When the electric coil 7B is de-energized and the electric coils 7A and 7D are energized when the rotor 4 is in the position, the magnet 6b is attracted to the electric coil 7A, the magnet 6a is repelled by the electric coil 7D, and the rotor 4 moves. Rotate to position. When reaching the position, the electric coil 7D is de-energized.

When the electric coil 7A is de-energized and the electric coils 7D and 7C are energized when the rotor 4 is in the position, the electric coil 7D attracts the magnet 6b, the electric coil 7C repels the magnet 6a, and the rotor 4 moves. , The permanent magnet 6b approaches the electric coil 7D, the permanent magnet 6a rotates in the direction of approaching the electric coil 7B, and the stopper arm 4a moves toward the base member 1.
It stops at the position where it hits the first stopper surface 11b. When reaching the position, the electric coil 7C is de-energized.

When the electric coil 7D is de-energized and the electric coils 7A and 7B are energized when the rotor 4 is in the position, the magnet 6b is attracted to the electric coil 7A, and the magnet 6a is repulsed by the electric coil 7B, so that the rotor 4 moves. Rotate to position. When reaching the position, the electric coil 7B is de-energized.

When the rotor 4 is in the position (hard), the shock absorber 21 largely attenuates the propagation of wheel vibration to the vehicle body. When the rotor 4 is in the position (soft), the damping force of the shock absorber 21 is low. Rotor 4
The position (sport) is a so-called middle position, and the damping force of the shock absorber 21 at this time is a substantially intermediate value between the position and the position.

On the lower surface of the base member 11 to which the flange portion of the case 1 is fixed, a soft resin polyester elastomer (a product name of Toray DuPont: trade name Hytrel) is provided at a position where the connecting members 9 and 10 penetrate and project downward. , The shore hardness 55D to 72D) is fixed.

The external appearance of this laminated material 12 is shown in FIG. The material 12 is
The plate-shaped portion and the sleeve 12 which is continuous with the plate portion and protrudes downward
c and 12d, the holes 12a and 12b of the sleeves 12c and 12d are opened vertically through the plate-shaped portion.

The coupling member 9 is a substantially tenon-shaped input coupling portion 9a that enters into and engages with a substantially tenon-shaped slot on the lower surface of the output shaft 4A of the rotor 4, and an input coupling portion 9a that is integral with the input coupling portion 9a. It has a flange 9b that spreads more to the side and a cylindrical leg-shaped output coupling portion 9c that is integral with the flange 9b.

4a shows an enlarged vertical sectional view of the connecting member 9, FIG. 4b shows the lower end face of the output coupling portion 9c, and FIG. 4c shows the input coupling portion 9.
a, the upper end surface of FIG.
The IVD line sectional view is shown. The continuous member 9 is generally formed by integrally molding a synthetic resin 30 on a metal cylinder 29.

FIG. 5a shows an enlarged plan view of the metal cylinder 29 alone.
FIG. 5b shows the lower end face, FIG. 5c the upper end face, and FIG. 5d the side view.

Referring to FIGS. 5a to 5d, the metal cylindrical body 29 is formed by pressing one end of one metal cylinder into a substantially tenon shape so that the input coupling portion 29 is formed.
a is formed and the other end of the original cylindrical shape is used as the output coupling portion 29c, and two slits 31 and 32 are cut therein.

The metal cylinder 29 is mounted on a mold for resin molding, and a resin molding process is performed to form a connecting member 9 in which a synthetic resin 30 is integrally molded on the metal cylinder 29 as shown in FIGS. 4a to 4d.
Is configured. In this embodiment, the synthetic resin 30 is
It is a polyester elastomer (Toray DuPont product name: Hytrel, Shore hardness 55D to 72D) which is a soft resin.

Please refer to FIGS. 4a to 4d. The inside and outside of the tip of the metal cylinder 29, the tip of the input joint portion 29a pressed into a substantially tenon shape,
The synthetic resin 30 is covered with the input coupling portions 30a ₁ and 30a ₂ , and the inside of the input coupling portion 29a is filled with 30a ₁ . The input coupling portions 30a ₁ and 30a ₂ are integrally continuous with each other, and the outer shape of the outer portion 30a ₁ thereof axially enters and radially engages with the slot of the lower surface of the output shaft 4A of the rotor 4. Shaped like a tenon, and the synthetic resin 30b forming the flange 9b is integrally continuous therewith. The synthetic resin 30b forming the flange 9b is
The inflection part 29b of the metal cylinder 29 is covered. The inner portion 30a ₂ of the input coupling portions 30a ₁ and 30a ₂ fills the inside of the input coupling portion 29a. The portion 30a ₂ is
The inside of the output coupling portion 29c of the metal cylinder 29 is filled,
It is integrally continuous with the output coupling portion 30c ₁ which is a part of the synthetic resin 30. The output coupling portions 30c _1, slot 33 substantially tenon shape of the tip of the upper end of the air damping force control rod (driven shaft) 20 can enter is formed. This output coupling portion 30c _1, the slit 31 of the metallic cylindrical member 29,
The tenon-shaped synthetic resins 30c ₂ and 30c ₃ that have entered 32
It is continuous.

In summary, the synthetic resin 30 has a portion 30b that covers the inflection portion 29b of the metal cylinder 29 as the flange 9b,
Portions 30a ₁ and 30 that are continuous with the above and cover the inside and outside of the input coupling portion 29a of the metal cylinder 29 and fill the inside thereof.
a ₂ , and the output coupling portion 29c of the metal cylinder body 29 continuously from this
Fills the inside of the cylinder, and the pneumatic damping force control rod 2
0 portion 30c ₁ that substantially tenon-shaped upper end has a slot 33 for entry of, and partial _30c 2, 3 of the portion 30c ₁ and successively fill the slits 31, 32 of the metallic cylindrical member 29
0c ₃ , these parts are integrally and continuously molded with each other in the molding process, and the metal cylinder 29
It is molded integrally with.

Because of the above-described structure, a portion 30a of the synthetic resin 30 is provided between the metal cylinder 29 of the connecting member 9 and the output shaft 4A of the rotor 4.
₂ , the synthetic resin 30 is interposed between the metal cylinder 29 of the connecting member 9 and the upper end of the pneumatic damping force control rod 20.
Portion 30c ₁ is interposed, these portions _30a 2, 30
c ₁ is the other portion 30 b, 30 a ₁ , 30 c ₂ , 30 c _3.
Since it is integrally continuous with each other, and each part is integrally joined to the inside and outside of the metal cylinder 29 by molding, the collision noise when the output shaft 4A rotates is small, Moreover, the synthetic resin 30 is not substantially deformed or damaged. The slits 31 and 32 of the metal cylinder 29 and the synthetic resins 30c ₂ and 30c ₃ filling them are particularly effective in preventing the torsional deformation of the portion 30c ₁ inside the output coupling portion 29c of the metal cylinder 29. high.

The structure of the connecting member 10 is similar to the structure of the connecting member 9 described above.

Referring back to FIG. The upper end of the pneumatic damping force control rod 20 enters the slot 33 of the connecting member 9 and engages with the connecting member 9 (a little movable in the extending direction of the rod 20 and the direction orthogonal thereto).
Are engaged with each other in the rotation direction about the shaft center).

The output coupling portion 9c of the coupling member 9 is inserted into the hole 12a of the mating material 12, the output coupling portion of the coupling member 10 is inserted into the hole 12b, and these coupling members 9 and 10 are respectively connected to the output shaft 4A of the rotor 4. Into the slot on the lower surface of the gear 12 and the slot on the lower surface of the output shaft 8A of the gear 8,
As shown in FIG. 1, the connecting member 9 is connected to the output shaft 4A of the rotor 4, and the connecting member 10 is connected to the output of the gear 8 by screwing these screws into the screw holes of the base member 11. The mating member 12 is fixed to the base member 11 while being joined to the shaft 8A.

The actuator described above is attached to the shock absorber 21 as follows. That is, the rubber bush 1 is inserted into the hole penetrating the fixing portion between the case 1 and the base member 11.
3, 14 and insert screws 15, 16 in these bushes.
The sleeve 12d of the mating material 12 is inserted into the opening of the upper end of the piston rod 18 of the shock absorber 21, and the upper end of the control rod 20 is connected to the output coupling portion 9c of the coupling member 9 and the output of the coupling member 10 is inserted. The upper end of the hydraulic damping force control rod (driven shaft) 19 is received in the shaft coupling portion and the actuator is provided with a shock absorber 21.
To the actuator support bracket 17 of the shock absorber 21.
Screw it into the screw hole.

In the embodiment described above, when the stopper arm 4a collides with the stopper surface 11a or 11b (dotted line in FIG. 2) of the base member 11, the rotor 4 and the base member 11 are impacted. This shock, shock absorber 21
The propagation path to (1) base member 11-rubber bushes 13, 14-bracket 17, (2) rotor 4-connecting member 9-control rod 20, (3) rotor 4-gear 8-connecting member 10-control. Rod 19, and
(4) Base member 11-Ladding material 12-Sleeve 12 thereof
There are four types of d-piston rods 18, but the above (1)
In the route of (1), the rubber bush 13 substantially blocks the propagation of impact, and in the route of (2), the synthetic resin 30c ₁ of the connecting member 9 buffers the impact, so the amount of impact propagation is extremely small, and even in the route of (3). Since the synthetic resin of the connecting member 10 buffers the shock, the shock propagation amount is extremely small, and in the path of (4), the mating material 12, particularly the sleeve 12d thereof, substantially blocks the shock propagation.

Further, when the output shafts 4A and 8A start to rotate, the play of the output shaft collides with the plane of the connecting member due to the slight play of the tenon / mortise connection between the output shafts 4A and 8A and the connecting members 9 and 10. Since the plane is made of synthetic resin, the collision noise is small.

Therefore, the collision noise of the actuator is less generated, and the propagation of the collision noise to the shock absorber 21 is significantly reduced.

Since there is a rubber bush between the base member 11 and the screws 15 and 16 integrated with the bracket 17 by screw connection,
In the initial positioning until the screws 15 and 16 are tightened, the positioning of the actuator with respect to the screws 15 and 16 tends to be inaccurate, but at this time, the sleeve 12d engages with the piston rod 18 to define the position, so The screws 15 and 16 are tightened in the state of being positioned. That is, the positioning when the actuator is assembled to the shock absorber 21 becomes accurate.

〔The invention's effect〕

As described above, according to the present invention, the connecting member (9, 10) is composed of the metal tubular body (29) and the synthetic resin (30) molded therein, and further, the drive shaft (4A, 8A) slides in the axial direction and rotates. The input coupling portion (9a) that engages in the direction, and the output coupling portion (9c) that slides in the axial direction with the driven shafts (20, 19) and engages in the rotation direction. The coupling portion (9a) is an input side end portion (29a) of the metal cylinder (29) for engaging the output shaft (4A, 8A) and a synthetic resin portion (30a ₁ , which covers the portion (29a).
30a ₂ ) and the output coupling portion (9c) is a metal cylinder (2) for engaging with the driven shaft (20, 19).
9) has an output side end portion (29c) and a synthetic resin portion (30c ₁ ) covering the portion (29c), and further covers the input side end portion (29a) of the metal tubular body (29). Synthetic resin (30a ₁ , 30a ₂ ) and metal cylinder (29)
Output side end (29c) of the synthetic resin (30
c ₁ ) is integrally continuous through the inside of the metal cylinder (29).

The input end portion (29a) of the metal tubular body (29) of the connecting member (9, 10), that is, the engagement portion (29a) with the drive shaft (4A, 8A), is covered with the synthetic resin (30a ₂ ). Therefore, the collision noise between the drive shaft (4A, 8A) and the connecting member (9, 10) is reduced. Further, the output end portion (29c) of the metal cylindrical body (29) of the connecting member (9, 10), that is, the engaging portion (29c) with the driven shaft (20, 19) is made of synthetic resin (30c ₁ ). Since they are covered, the connecting members (9, 1
0) and the driven shaft (20, 19) reduce the collision noise.

The synthetic resin (30a ₁ ) covering the input end portion (29a) of the metal cylinder (29) and the synthetic resin (30c ₁ ) covering the output end portion (29c) are integrally continuous, and the metal cylinder body (29)
That is, the synthetic resin (30) is bonded to the metal cylinder (29), and the metal cylinder (2)
Since the inside of 9) is filled, the coupling of the synthetic resin (30) to the metal cylinder (29) is strong, and the drive shaft (4
A, 8A) and the force applied to the synthetic resin (30) from the driven shafts (20, 19) are substantially received by the metal cylinder (29) through the synthetic resin (30) and endure this, so that the connecting member ( Substantially no deformation or damage of (9, 10) occurs.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an actuator of a shock absorber equipped with an embodiment of the present invention. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is an exploded perspective view showing the mating material 12 and the output shaft 9 shown in FIG. 1 in an exploded manner. FIG. 4a is an enlarged vertical sectional view of the connecting member 9 shown in FIGS. 1 and 3. FIG. 4b is a plan view showing the front of the output coupling portion of the connecting member 9. FIG. 4c is a plan view showing the front of the input coupling portion of the connecting member 9. FIG. 4d is a sectional view taken along line IVD-IVD of FIG. 4a. FIG. 5a is a plan view of the metal cylinder 29 that constitutes the connecting member 9. FIG. 5b is a right side view showing the end face of the output coupling portion of the metal cylinder 29. FIG. 5c is a left side view showing the end face of the input coupling portion of the metal cylinder 29. FIG. 5d is a front view of the metal cylinder 29. 1: Case, 2: Mandrel 3: Bearing, 4: Rotor 4A: Output shaft (driving shaft), 4a: Stopper arm 4b: Tooth, 5: Steel ball 6a, 6b: Permanent magnet, 7: Magnetic substance 7A to 7D: Electric coil, 8: Gear 8A: Output shaft (driving shaft), 9, 10: Connection member (connection member) 9a: Input coupling part (input coupling part), 9b: Flange 9c: Output coupling part (output coupling part) 11 : Base member, 11a, 11b: Stopper surface 12: Composite material, 12c: Sleeve 12d: Sleeve, 13, 14: Rubber bush 15, 16: Screw, 17: Bracket 18: Piston rod 19: Hydraulic damping force control rod Drive shaft) 20: Pneumatic damping force control rod (driven shaft) 21: Shock absorber, 29: Metal cylinder (metal cylinder) 29a: Input coupling part (input side end part), 29b: Curved portion 29c: output coupling section (output side end portion), 30: synthetic resin 30a _{1, 30a} 2 :( coated synthetic resin portion) _30c 1 :( coated synthetic resin part), 31, 32: slit (slit) 30c ₂ , 30c ₃ : synthetic resin (part)

Continuation of the front page (56) Bibliography Sho 64-12002 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A connecting member, which is interposed between the drive shaft and the driven shaft for transmitting the torque to the driven shaft, is made of a metal cylinder and a synthetic resin molded therein, and is slidable in the axial direction with the drive shaft. An input coupling portion that engages in the rotational direction and an output coupling portion that axially slides in the driven shaft and engages in the rotational direction; and the input coupling portion engages with the drive shaft. An input side end of the metal cylinder for fitting and a synthetic resin part covering the part, and the output coupling part has an output side end of the metal cylinder for engaging the driven shaft. And a synthetic resin portion that covers that portion; the synthetic resin that covers the input side end of the metal cylinder and the synthetic resin that covers the output side end of the metal cylinder are A connecting member for torque transmission, characterized by being integrally continuous through the inside; .