ACTUATOR
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- TOYODA GOSEI CO LTD
- Filing Date
- 2020-01-09
- Publication Date
- 2026-07-23
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
[0001] The present invention relates to an actuator (an actuating element) that is actuated by actuating gas generated by a gas generator, and relates, for example, to an actuator that is suitable for use in an automotive safety device placed on a vehicle, such as a hood release device (engine hood release device) that is actuated to lift a hood panel when picking up a pedestrian who is an object to be protected.
[0002] In the related technology, such a type of actuator is used in the hood-opening device designed to lift the hood plate and comprises: an inner component equipped with a gas generator designed to produce an actuating gas during actuation; and an outer component covering the inner component and moved forward by the actuating gas produced by the gas generator to lift the hood plate (see, for example, JP-A-2015-123868 and JP-A-2017-180668).
[0003] The inner component has a cylindrical housing designed to contain the gas generator. A pointed end section of the housing is open to allow the actuating gas generated by the gas generator to be discharged from the pointed end. The outer component has a head section designed to cover the opening of the inner component's housing and a cylindrical covering section extending from an outer circumferential edge of the head section to cover an outer circumferential surface face of the housing. The outer component directs the actuating gas generated by the gas generator to flow to an inner circumferential face of the covering section on one side of a rear surface of the head section and moves forward so that it is away from the inner component.In such an actuator, a base section side of the inner component located away from the opening in the housing and the head section of the outer component are each connected to a predetermined section of a hinge mechanism of the hood plate, so that the hood plate can be lifted during actuation.
[0004] However, in the actuator of the related technology, the outer component, which includes the head section and the cover section, is formed from a solid block of metal by forging and cutting. That is, the cover section has a cylindrical shape, and after the block material is forged and shaped to a certain extent so that it approximates the essentially cylindrical shape of the cover section, the outer component is formed by cutting around the head section within the cover section. This increases machining man-hours and machining costs, as well as the amount of cutting waste that must be discarded, which is not resource-efficient and leaves room for improvement.
[0005] The present disclosure solves the problems described above, and one object of it is to provide an actuator that can be easily designed in a resource-saving manner.
[0006] According to one aspect of the disclosure, an actuator is provided comprising: an internal component having a housing which has a cylindrical shape, which is configured to hold a gas generator in it, which gas generator is configured to generate an actuating gas during actuation, and in which a tip end section of the housing is open so that the actuating gas generated by the gas generator is enabled to be released (vented) from the tip end;and an outer component comprising a head section configured to cover an opening of the housing, and a covering section having a cylindrical shape extending from an outer circumferential edge of the head section so as to cover an outer circumferential surface side of the housing, which outer component causes the actuating gas generated by the gas generator to flow to an inner circumferential surface side of the covering section on one side of a rear surface of the head section, and moves forward so as to be away from the inner component, wherein: the head section and the covering section of the outer component are configured as separate components; and the outer component is configured by coupling a coupling section corresponding to the head section and a coupling section corresponding to the covering section.
[0007] In the actuator according to the present disclosure, the outer component is formed by coupling the coupling sections provided corresponding to the head section and the cover section. Since the cylindrical cover section can be formed from the tube material instead of from a solid block of material, machining man-hours and machining costs for the outer component can be reduced. Furthermore, resource savings are achieved because machining waste can be reduced.Since the outer component is formed by coupling the head section and the cover section, when a volume of a storage chamber designed to store the actuating gas supplied by the gas generator is set in an initial stage of actuation, a sealing surface that closes the opening of the inner component can be easily adjusted in the head section by recessing or protruding it without altering the cover section. Furthermore, since the outer component is formed by coupling the head section and the cover section, even if the shape of the head section is changed to match the shape of a component to be pressed during actuation of the actuator, the cover section can be easily adjusted with minimal change.
[0008] Therefore, according to the present disclosure, the actuator can be easily manufactured in a resource-saving manner and can also be easily handled, even if a design of the head section is changed.
[0009] In the aspect of the disclosure, the head section of the outer component may have a coupling shaft section, serving as the coupling section, on a base section side, which coupling shaft section has a coupling recess recessed from an outer circumferential surface; and the covering section of the outer component may have on a tip end section thereof a coupling cylinder section having a cylindrical shape, serving as the coupling section and covering an outer circumference of the coupling shaft section, which coupling cylinder section has a fitting projection that fits into the coupling recess of the coupling shaft section and is thus coupled to the coupling shaft section.
[0010] One such design concerns the coupling between the head section and the covering section. The coupling cylinder section on a tip end side of the covering section is covered on the coupling shaft section on the base side of the head section. If the fitting projection, which is formed by crimping to reduce the diameter of the coupling cylinder section, is fitted into the coupling recess, the coupling shaft section can be coupled to the coupling cylinder section. Even if the head section and the covering section are separated, the head section and the covering section can be easily coupled.
[0011] In this aspect of the disclosure, the housing of the inner component can be made of a metal tube material and comprise a general cylinder section arranged on an outer circumferential side of the gas generator, and a tip-end cylinder section arranged on a tip-end side of the general cylinder section, which tip-end cylinder section has a larger diameter than a diameter of the general cylinder section, which covering section of the outer component can be made of a metal tube component, and a reduced-diameter section having a reduced diameter can be arranged on a base section side away from the head section, such that an inner circumferential surface of it is made slidably displaceable on an outer circumferential surface of the general cylinder section.and the tip end cylinder section of the inner component and the reduced diameter section of the outer component can form a stop mechanism in which the reduced diameter section abuts the tip end cylinder section and stops a forward movement of the outer component when the outer component is moved forward during an actuation.
[0012] With such a design, since the reduced-diameter section of the outer component, which is moved forward by a predetermined actuating stroke, abuts the tip end cylinder section of the inner component during actuation and stops any movement of the head section of the outer component, a device using the actuator according to the present disclosure can be actuated without difficulty. Since the housing of the inner component and the covering section of the outer component are formed from the metal tube material, the tip end cylinder section, which has a larger diameter compared to the general cylinder section, can be easily formed in the housing of the inner component, and the reduced-diameter section can be easily formed in the covering section of the outer component by forging.
[0013] In the aspect of the disclosure, a watertight annular sealing material can be arranged over an entire circumference between an inner circumferential surface of the coupling cylinder section of the covering section of the outer component and an outer circumferential surface of the coupling shaft section of the head section.
[0014] With this design, the waterproof sealing material is positioned between the coupling sections of the head section, which covers the opening of the inner component, and the cover section of the outer component of the actuator. This prevents rainwater entering from this section from entering the opening side of the inner component, thus preventing deterioration of the gas generator's contents. If the sealing material is positioned between the coupling sections of the head section and the cover section, the actuating gas released by the gas generator during actuation can be prevented from leaking onto the outside of the outer component. This ensures a stable, predetermined pressure for the actuating gas, allowing the outer component to be moved forward by a predetermined driving force.
[0015] In this aspect of the disclosure, the covering section of the outer component may have an enlarged-diameter cylinder section whose diameter is enlarged, such that a gap is opened between the covering section and the outer circumferential surface of the general cylinder section at an end edge of the reduced-diameter section away from the head section, and a watertight annular sealing material may be arranged over an entire circumference between an inner circumferential surface of the enlarged-diameter cylinder section and the outer circumferential surface of the general cylinder section.
[0016] With this design, rainwater entering from the opening end of the cover section is prevented from entering the head section of the cover section due to the sealing material between the outer circumferential surface of the general cylinder section in the housing of the inner actuator component and the inner circumferential surface of the cover section of the outer component. This prevents deterioration of the gas generator's contents. Since dust is prevented from entering, a sliding surface between the reduced-diameter section of the cover section and the outer circumferential surface of the general cylinder section can remain smooth.During actuation, the reduced-diameter section of the covering section can slide smoothly (frictionlessly) on the outer circumferential surface of the general cylinder section, and thus the actuator can stably exhibit the predetermined driving force.
[0017] According to another aspect of the disclosure, a method for manufacturing an actuator is provided, comprising: an inner component having a housing having a cylindrical shape, configured to hold a gas generator, the gas generator being configured to produce an actuating gas during actuation, and in which a tip end section of the housing is open, allowing the actuating gas produced by the gas generator to be released from the tip end;and an outer component comprising a head section configured to cover the opening of the housing, and a covering section having a cylindrical shape extending from an outer circumferential edge of the head section so as to cover an outer circumferential surface face of the housing, which outer component causes the actuating gas generated by the gas generator to flow to an inner circumferential surface face of the covering section on one side of a rear surface of the head section, and moves forward so as to be away from the inner component, which comprises methods of: forming the housing of the inner component from a metal tube material by forging; forming the covering section of the outer component from a metal tube material by forging; forming the head section of the outer component from a metal block material by forging and cutting;and coupling sections are provided according to the head section and the covering section and coupled together so that the outer component is formed.;
[0018] In the method for manufacturing the actuator according to the present disclosure, the inner component is formed from the metal tube material by forging, even though the housing containing the gas generator has a cylindrical structure in which the generated actuating gas is discharged from the opening at the tip end section. Since cutting operations that produce cutting waste are avoided where possible, the inner component can be manufactured in a resource-saving manner. In the outer component, since the head section is formed from the metal block material by forging and cutting, as described above, and the cover section is formed from the metal tube material by forging, the outer component can also be easily manufactured in a resource-saving manner.Furthermore, since the outer component is formed by coupling the head section and the covering section, which are separate, even if the shape of the head section is changed to match the shape of a component to be pressed during actuation of the actuator, the covering section can be easily handled without modification.
[0019] Therefore, in the process for manufacturing the actuator according to the present disclosure, the actuator can be easily manufactured in a resource-saving manner.
[0020] The following disclosure is more fully understood from the detailed description given below and the accompanying drawing, which is included for illustrative purposes only and is therefore not limiting to the present disclosure, and in which: Fig. 1 a schematic longitudinal partial cross-sectional view of a vehicle to describe an actuation state of a hood opening device which uses an actuator according to an embodiment of the present disclosure; Fig. 2 a schematic longitudinal cross-sectional view of the actuator of the embodiment is, Fig. 3 a schematic longitudinal cross-sectional view after actuation of the actuator of the embodiment; Fig. 4 is a schematic perspective exploded view of the actuator of the embodiment; Fig. 5 describes a process for forming a head section of an external component of the embodiment; Fig. 6 describes a process for forming a covering section of the outer component of the embodiment; Fig. 7 describes a process for coupling the covering section and the head section of the outer component of the embodiment; Fig. 8 describes a process for forming a housing of an internal component of the embodiment; Fig. 9A and Fig. 9B show an actuator that demonstrates a modification of the embodiment and show an adjustment of the volume of a storage chamber; and Fig. Figure 10 shows a schematic longitudinal cross-sectional view of an actuator according to another modification of the embodiment.
[0021] An embodiment of the present disclosure is described below with reference to the drawings. As in Fig. As shown in 1, an actuator is used. 20the embodiment in a hood opening device (hereinafter optionally referred to as the "opening device") U, which serves as an automotive safety device, is used and is mounted on a hinge mechanism. 9 on one side of a rear end 7c a hood panel (engine hood) 7 arranged in a vehicle V.
[0022] A sensor capable of detecting or predicting a collision with a pedestrian is mounted on the front bumper (not shown) of vehicle V. When a control circuit (not shown), configured to receive a signal from the sensor, detects a collision between vehicle V and the pedestrian based on the sensor signal, an explosive (not shown) is released in a gas generator. 40 (see Fig. 2 and Fig. 4) of the actuator 20to generate actuating gas G, so that the actuator 20 is activated, and the folding device U is activated, so that the rear end 7c the hood plate 7 is raised.
[0023] As in Fig. As shown in 1, the hood plate is covered. 7 a top side of an engine compartment ER of vehicle V and is connected to a vehicle body (body) side of vehicle V by a joint mechanism 9 , which is located on the left and right sides in the vicinity of the rear end 7c is arranged (see two-point catenary lines in section A of Fig. 1) connected so that it can be opened and closed from the front. The hood plate 7 is made of a metal sheet made of steel, aluminum alloy or the like, and has an outer plate 7a on one side of an upper surface and an inner plate 7b, which is located on one side of a lower surface, to improve the strength of the outer plate 7a up. The hood plate 7 It is plastically deformable, so that it is able to absorb the kinetic energy of the pedestrian when the hood plate 7 picks up the pedestrian. In this embodiment, the actuator 20 activated when the vehicle V and the pedestrian collide, as described in section B of Fig. 1 is shown, since a deformation space S is located between the rear end 7c the raised hood plate 7 and the engine compartment ER can be formed, the extent of plastic deformation during plastic bending deformation can be increased, and the hood plate 7 can absorb a large amount of the pedestrian's kinetic energy.
[0024] The joint mechanism 9 is on the left and right sides of the rear end 7cthe hood plate 7 arranged. The joint mechanism 9 has a joint base 10 , located on the body-1 side under the rear end 7c the hood plate 7 is attached, a mounting plate 13 , located on one side of a lower surface of the rear end 7c the hood plate 7 is arranged, and has an articulated arm 12 , which passes through the joint base 10 and the mounting plate 13 It is pivotally supported (mounted) on. The joint base 10 is attached to a mounting flange 2 , which is attached to the body-1 side with a hood edge hose or the like. The joint mechanism 9 opens around a support shaft (bearing shaft) 11 , which the articulated arm 12 and the joint base 10 connects and serves as a pivot point when the hood plate 7during normal use (see the two-point catenary lines in section A of Fig. 1).
[0025] The articulated arm 12 It extends forward from a base end to a tip end. The base end is connected to one side of a posterior end of the joint base. 10 through the support shaft 11 connected and is around the support 11 , which serves as the pivot point, is rotatable. The tip end is connected to one side of a front end of the mounting plate. 13 through a support shaft (bearing shaft) 14 connected and is around the support 14 , which serves as the center of rotation, rotatable. Axial directions of the left and right support shafts 11 , 14 They extend along a left-right direction of the vehicle V. However, during normal use, because the articulated arm 12 and the mounting plate 13by a shear pin (shearing pin) 15 , which can break if the actuator 20 is operated, are connected, the articulated arm 12 and the mounting plate 13 not about the support staff 14 turn, and the hood plate 7 a section of the support shaft will be removed 11 , which serves as the pivot point, opened and closed when the hood plate 7 It is opened and closed during normal use. That is, when the hood plate 7 , as in section A of Fig. 1 of solid lines to the two-point catenary lines is shown, when opened, one side of a front end of the hood plate is shown. 7 around the left and right support shaft 11 , which serve as the pivot point, raised, and the hood plate 7 It can be opened from the front. If the side of the front end is lowered, the hood plate 7closed, by surrounding the support shaft 11 , which serves as the center of rotation, is rotated.
[0026] The left and right joint mechanisms 9 are arranged symmetrically, and two ends of the actuator 20 (Sections of connecting holes) 21a and 50a , see Fig. 2 and Fig. 3) are respectively by shaft support pins 17 , 18 with sections of the articulated arm 12 and the mounting plate 13 connected on the engine compartment ER side.
[0027] A known hood locking mechanism is located on the side of the front end of the hood panel. 7 The hood locking mechanism has a locking latch located on a lower surface of a front end of the hood plate. 7is attached, and a latch located on the body-1 side engages the locking bolt. The latch cannot unlock the locked locking bolt without actuating a lever (not shown). Even if the rear end 7c the hood plate 7 When lifted, the front end of the hood plate 7 Due to the trap that locks the locking bolt of the hood locking mechanism, it is not lifted away from the body-1 side. If the actuator 20 When activated and extended, the shear pin 15 broken, and an angle of intersection between the articulated arm 12 and the mounting plate 13 is enlarged. The rear end 7c the hood plate 7 is lifted without lifting the side of the front end that is locked by the hood locking mechanism, as described in section B of Fig. 1 is shown from the two-point catenary lines to the solid lines.
[0028] As in Fig. As shown in 1, there is also a protective cap. 5 behind the hood plate 7 arranged, which form a highly rigid protective cap plate 5a , which is provided on the body-1 side, and a protective cap ventilation grille 5b , which is made of synthetic resin, positioned above the protective cap plate 5a is provided for, has. One side of a rear end of the protective cap ventilation grille 5b is connected to one side of a lower section of a windshield 3 tied together.
[0029] As in Fig. 2 to Fig. As shown in 4, the actuator indicates 20 of the embodiment: an internal component 21 , in which the gas generator 40, which is designed to generate the actuating gas G during actuation; and an external component 50 , which is due to the actuating gas G, which is supplied by the gas generator 40 is generated, forwards and away from the inner component 21 moved.
[0030] The inner component 21 points to the gas generator 40 and a cylindrical housing 22 , which is trained to operate the gas generator 40 to keep it in place. A holder 31 is also in the housing 22 arranged so that it connects to the gas generator 40 It allows it to be positioned and held in place. The connecting hole 21a , through which the shaft support pin 17 is inserted into the inner component 21 on one side of an end section that is connected to the gas generator 40 is removed, provided.
[0031] The holder 31 is equipped with a pin base38 , who is trained to insert a connecting pin 40d of the gas generator 40 and a connecting wire 39 , who is trained to send an activation signal to the gas generator 40 to enter, to connect, to provide and has a base section 32 , in which the pin base 38 is arranged to include an extension spacer section 34 , which connects the wire 39 holds and on the outside of the case 22 protrudes, and a seal 33 , which is designed to provide a watertightness property of the base section 32 and the extension spacer section 34 to improve, on. The base section 32 and the extension spacer section 34 are made of synthetic resin, such as polyamide, and the seal 33 It is made of rubber. The extension spacer section34 halves the case 22 in a direction orthogonal to the axis of the housing 22 , and the connecting wire 39 is sandwiched between the dividing surfaces. In the extension spacer section 34 is an assembly hole 21b , through which a rivet 42 to attach the holder 31 on the case 22 inserted, together with the casing 22 trained.
[0032] A detonator, a micro gas generator, or the like is placed in the gas generator. 40 used so that the actuating gas G is drawn from a tip end 40a by igniting a predetermined explosive (not shown) and burning the explosive itself, or by burning a gas-generating device that is ignited by the explosive. In the gas generator 40 There is a connecting pin 40d from a basic section40b in front, and a flange section 40c stands on an outer perimeter in the vicinity of the base section 40b before. The gas generator 40 is in the case 22 in a state in which the flange section 40c through a retaining ring 36 , which is located on an inner circumferential surface 27b of the case 22 is attached, is pressed and the connecting pin 40d into the pen base 38 of the base section 32 It is inserted, positioned, and held in place. A sealing ring. 37 is also around the connecting pin 40d arranged.
[0033] The case 22 is made from a metallic cylindrical housing tube component 80 , which is made of steel or the like, made of (see Fig. 8), and an opening 23 , which is trained to supply the actuating gas G, which is supplied by the gas generator 40The generated, to be released (omitted), is at a tip end section 22a arranged. The housing 22 features a top end cylinder section 24 , where the opening 23 is provided for, and a cylindrical general cylinder section 27 , which is located on one of the openings 23 The remote page is intended to be used.
[0034] The top end cylinder section 24 It has a cylindrical shape, the diameter of which is enlarged, so that its inner and outer diameters are larger than those of the general cylindrical section. 27 are. A graduated section 25 , which is one of the general cylinder section 27 has an enlarged diameter, is on a diameter enlargement side of the general cylinder section 27 arranged. In this embodiment, an outer circumferential surface serves this purpose. 24a of the top end cylinder section 24as a sliding surface that rests on an inner circumferential surface 60c of the covering section 60 , which is described below, of the outer component 50 slides when the actuator 20 is activated.
[0035] In the general cylinder section 27 are the gas generator 40 and the holder 31 on the side of an inner circumferential surface 27c up to the area surrounding the stepped section 25 arranged, are the connecting hole 21a , through which the shaft support pin 17 is inserted, and the assembly hole 21b , through which the rivet 42 is inserted on the opening 23 It is located on the remote base section page and is an insertion section. 29 , which connects the wire 39 It protrudes, opening on one end edge.
[0036] The case 22 is made from the housing tube material80 manufactured, and forging (for example, upsetting or drop forging), as in sections A and B of Fig. As shown in Figure 8, this is used to form the end cylinder section with an increased diameter. 24 carried out. Afterwards, as described in sections B and C of Fig. As shown in 8, the connecting hole 21a , the assembly hole 21b and the insertion section 29 formed through cutting operations (machining, for example drilling).
[0037] Then the inner component 21 by assembling the base section 32 , in which the pin base 38 , the one with the connecting wire 39 is connected, is arranged, of the sealing ring 37 , the seal 33 and the extension spacer section 34 trained. Each connecting pin 40d is attached to the pin base 38attached, the gas generator 40 will be attached to the holder 31 attached, and the arrangement is placed in the housing 22 from the opening 23 The removed base section page is inserted. Then a section of the connecting wire is inserted. 39 , which is from the extension spacer section 34 The preceding section is inserted into the insertion section. 29 The assembly holes are inserted. 21b of the case 22 and the holder 31 aligned with each other, and the rivet 42 , which serves as a stop through the assembly holes 21b guided. If the rivet 42 on the case 22 Once attached, the holder 31 , which is connected to the gas generator 40 is provided in the case 22 to be attached. Then the retaining ring is used. 36 around the flange section 40c through the opening 23 The gas generator is attached. 40in the case 22 attached, and thus the inner component can 21 to be manufactured.
[0038] The outer component 50 has a head section 51 , who is trained to open the housing 22 to cover, and a cylindrical covering section 60 , which extends from an outer circumferential edge of the head section 51 extends so that it forms an outer circumferential surface-27a side of the housing 22 covered, on. The outer component 50 This causes the actuating gas G, which is supplied by the gas generator, to 40 is generated, in addition to an inner circumferential surface side of the covering section. 60 on one side of a posterior surface of the head section 51 to flow, and moves forward, so that it is separated from the inner component 21 removed. The outer component 50 is in the head section 51 with the connecting hole50a provided by which the shaft support pin 18 , which is trained to control the joint mechanism 9 to the mounting plate 13 to couple, is inserted.
[0039] The head section 51 and the covering section 60 are designed as separate components, and the outer component 50 is achieved by coupling a coupling shaft section 53 and a coupling cylinder section 62 connected to each other, which are designed as coupling sections.
[0040] The head section 51 is made from a head section block component 83 , which is made of metal, such as steel, formed (see Fig. 5) and has a rectangular, plate-shaped body section 52 , which is located on a pointed end face, and the essentially cylindrical coupling shaft section 53, which is located on a base section side. The body section 52 The connecting hole 50a , through which the shaft support pin 18 the joint mechanism 9 is inserted. The coupling shaft section 53 is on an outer circumferential surface 53a with a coupling deepening 54 , which are located on the side of the outer circumferential surface 53a is recessed in a ring shape, and has a ring-shaped receiving groove 53b , in which a ring-shaped sealing material 71 is arranged, provided. The recording 53b is between the coupling deepening 54 and the body part 52 arranged.
[0041] The covering section 60 is made from a cylindrical covering section pipe component 88 , which is made of metal, such as steel, formed (see Fig. 6) and points to a tip end section60a a cylindrical coupling cylinder section 62 , which has an outer circumference of the coupling shaft section 53 of the head section 51 covered, on. The coupling cylinder section 62 has a passing advantage 63 , which enters the coupling deepening 54 of the coupling shaft section 53 It fits, and is therefore attached to the coupling shaft section. 53 coupled. In the coverage section 60 is an essentially cylindrical reduced-diameter section 64 on the head section 51 remote side of a base section 60b arranged. A dimension of an inner diameter of the reduced-diameter section. 64 is reduced, so that an inner circumferential surface is allowed to be used on the outer circumferential surface 27a of the general cylinder section 27 to slide, so that it acts as a sliding surface 64aIt serves a purpose. The reduced-diameter section 64 is designed in such a way that a stepped section 65 , which is on the side of the tip end section 60a of the covering section 60 is located on the stepped section 25 of the inner component 21 bumps into something when the outer component 50 moved forward (see Fig. 3).
[0042] Therefore, the graduated section 25 of the top end cylinder section 24 of the inner component 21 and the graduated section 65 of the reduced-diameter section 64 of the outer component 50 a stop mechanism SS in which the stepped section 65 of the reduced-diameter section 64 at the stepped section 25 of the top end cylinder section 24 initiates a forward movement of the outer component 50stops when the outer component 50 during an actuation of the actuator 20 is moved forwards.
[0043] The covering section 60 of the outer component 50 features an enlarged diameter cylinder section 67 , whose inner diameter dimension is enlarged, so that a gap H between the covering section 60 and the outer circumferential surface 27a of the general cylinder section 27 of the inner component 21 is opened at one end edge of the head section 51 removed reduced-diameter section 64 on. A waterproof, ring-shaped rubber sealing material. 72 is over an entire circumference between an inner circumferential surface 67a of the enlarged diameter cylinder section 67 and the outer circumferential surface 27a of the general cylinder section 27on the side of the inner circumferential surface 67a of the enlarged diameter cylinder section 67 arranged so that the gap H is filled. The sealing material 72 is on the side of the covering section 60 attached. If the actuator 20 When activated, the sealing material slides. 72 on the sliding surface 27b on the side of the outer circumferential surface 27a of the general cylinder section 27 of the inner component 21 (see Fig. 3).
[0044] Furthermore, since a ring-shaped rubber sealing material 71 in the recording 53b , which are in the coupling shaft section 53 of the head section 51 is intended, is included, waterproof properties for an inner circumferential surface 62a of the coupling cylinder section 62 of the covering section 60 and the outer circumferential surface53a of the coupling shaft section 53 of the head section 51 ensured across the entire scope.
[0045] The head section 51 of the outer component 50 is made from a head section block material 83 , which is made of metal, such as steel, and has a predetermined shape, such as a cylindrical shape. External shapes of the body segment 52 without the connecting hole 21a and the coupling shaft section 53 without the recording 53b are shaped by forging (for example, drop forging), as in sections A and B of Fig. 5 is shown. Next, as in section C of Fig. As shown in section 5, the connecting hole 21a and the recording 53b formed by cutting operations (for example, the connecting hole is formed) 21aformed by drilling, and the receiving groove 53b (is formed by turning).
[0046] The covering section 60 is made from the cylindrical covering section pipe material 88 , which is made of metal, such as steel, formed, as in Fig. Figure 6 shows the coupling cylinder section. 62 without the passing advantage 63 and the reduced-diameter section 64 are formed through forging. Next, as in Fig. As shown in section 7, the coupling shaft section 53 of the head section 51 , in which the sealing material 71 in the recording 53b is included in the coupling cylinder section 62 without the passing advantage 63 of the covering section 60 fitted, and caulking is used to reduce the diameter of the coupling cylinder section. 62carried out. If the pass advantage 63 , which enters the coupling deepening 54 of the coupling shaft section 53 It is fitted into the coupling cylinder section 62 Once formed, the coupling cylinder section can 62 and the coupling shaft section 53 can be coupled, and thus the outer component can 50 to be manufactured.
[0047] However, the reduced-diameter section 64 and the passing advantage 63 of the covering section 60 formed, while the outer component 50 to the inner component 21 is cultivated. That is, first the pipe material is 88 on the inner component 21 attached so that it is the inner component 21 in a state where the reduced-diameter section 64 and the passing advantage 63 of the pipe material 88are not trained, covered. The sealing material 72 is located on the side of the inner circumferential surface 60c , which are on the side of the basic section 60b is located, attached. Then the base section-60b side is caulked so that a diameter on the outer circumferential surface-27c side of the general cylinder section 27 of the inner component 21 is reduced, and the reduced-diameter section 64 and the enlarged diameter cylinder section 67 are trained. The sealing material 72 is on the inner circumferential surface-67a-side of the enlarged diameter cylinder section 67 arranged. Next, the coupling cylinder section will be 62 of the covering section 60 before the formation of the pass advantage 63 at a position in the tip end section 22a of the case 22 of the inner component 21arranged. Furthermore, the coupling shaft section 53 of the head section 51 , in which the sealing material 71 in the recording 53b fitted on the inner circumferential surface-62a side of the coupling cylinder section 62 arranged. Then the coupling cylinder section is 62 The crimped joint reduces the diameter, thus increasing the pass. 63 , which is located at the coupling deepening 54 of the covering section 60 is attached, formed, and thus the outer component can be 50 to be manufactured. At the same time, the outer component is being manufactured. 50 on the inner component 21 built-up, and thus the actuator can 20 to be assembled.
[0048] Then the connecting wire 39 with a control circuit (not shown) in the actuator 20, which is assembled as described above, connected. The shaft support pins 17 , 18 are inserted into the connecting holes 21a , 50a regarding the mounting plate 13 and the articulated arm 12 of the left and right joint mechanism 9 the hood plate 7 inserted. The sections of the inner component 21 and the outer component 50 (the sections of the connecting holes 21a , 50a) at both ends of the actuator 20 are connected, and thus the folding device U can be placed on the vehicle V.
[0049] Once the folding device U is placed on the vehicle V, it fills up if the actuator 20 according to the embodiment, and the gas generator 40 The actuating gas G creates a storage chamber. 75 , located on an inner circumferential side of the covering section60 on one side of a rear surface 56 of the head section 51 of the outer component 50 is located. The head section 51 absorbs a pressure of the actuating gas G, and the sliding surface 64a on the inner circumferential surface side of the reduced-diameter section 64 glides on the outer circumferential surface 27a of the case 22 of the inner component 21 , which is the sliding surface 27b serves, as described in Section B of Fig. 1 from two-point catenary lines to solid lines, or in Fig. 2 and Fig. Figure 3 shows the inner circumferential surface. 60c of the covering section 60 of the outer component 50 is applied to the outer circumferential surface 24a of the top end cylinder section 24 of the inner component 21 Slidingly displaced. The outer component 50moves forward in relation to the inner component, the actuator 20 is extended, and the shear pin 15 It will break. Because of a cutting angle between the mounting plate 13 and the articulated arm 12 As it is enlarged, the side of the rear end becomes larger. 7c the hood plate 7 lifted. The hood plate 7 can ensure that the deformation space S is wide, an impact can be mitigated, and a pedestrian can be absorbed by plastic deformation with a large degree of deformation.
[0050] In the actuator 20 According to the present embodiment, the outer component 50 by coupling the coupling sections 53 , 62 , corresponding to the head section 51 and the covering section 60 are designed to be formed together. Since the cylindrical covering section 60 from the pipe material88 Since the outer component can be formed from a solid block of material instead of being formed from a solid block, machining man-hours and machining costs can be reduced. 50 can be reduced. Furthermore, since processing waste can be reduced, resource savings are achieved. Because the outer component 50 by coupling the head section 51 and the covering section 60 is formed when a volume of the storage chamber 75 , which is trained to supply the actuating gas G, which is supplied by the gas generator 40 When dispensed, stored, and set to an initial stage of actuation, the closure surface can be 56 , which opens 23 of the inner component 21 closes, in the head section 51 They can be easily adjusted by deepening or protruding, without affecting the covering section. 60 to change.
[0051] For example, it's like in an actuator. 20A , who in Fig. As shown in 9A, there is a lead 56a on a closure surface 56A , which opens 23 of the inner component 21 closes, in a head section 51A an external component 50A provided, and a volume of a storage chamber 75A is narrowed. If the actuator 20A When activated, a compressive force is exerted on the outer component. 50 increased, or as in an actuator 20B , who in Fig. 9B is shown as a deepening 56b in a closure surface 56B , which opens 23 of the inner component 21 closes, in a head section 51B an external component 50B provided, and a volume of a storage chamber 75B is enlarged. If the actuator 20B When activated, the compressive force of the outer component can be increased. 50be reduced.
[0052] Furthermore, since the outer component 50 by coupling the head section 51 and the covering section 60 is formed, even if a form of the head section 51 corresponding to a form of during the actuation of the actuator 20 The covering section is changed when the component being pressed is altered. 60 easily handled with minimal change.
[0053] For example, as in an actuator 20C , which is defined by two-point catenary lines in Fig. 2 and Fig. As shown in section 3, a body part 52C of a head section 51C the connecting hole 50a , which is in the header section 51 the embodiment does not have a flat printing surface, but rather a flat printing surface. 52a on an upper forehead surface. If the head section 51 of the actuator 20is replaced if the actuator 20C is activated, the printing surface 52a at a recording seat 19a a predetermined printed component 19 on, the printed component 19 , the one with the recording seat 19a is equipped to be moved to a predetermined position.
[0054] Therefore, the actuator can 20 According to the embodiment, it can be easily designed in a resource-saving manner and can also be easily handled, even if the head section is designed in a particular way. 51 is changed.
[0055] In the actuator 20 According to the embodiment, the head section 51 of the outer component 50 the coupling shaft section 53 , which serves as the coupling section, on the base section side. The coupling shaft section 53 The coupling deepening 54, which is recessed from the outer circumferential surface-53a side. The covering section 60 of the outer component 50 points to the top end section 60a the cylindrical coupling cylinder section 62 , which defines the outer circumference of the coupling shaft section 53 covered and serving as the coupling section. The coupling cylinder section 62 indicates the passing advantage 63 , which enters the coupling deepening 54 of the coupling shaft section 53 It fits, and is therefore attached to the coupling shaft section. 53 coupled.
[0056] Therefore, in the actuator 20 according to the embodiment, which concerns the coupling between the head section 51 and the covering section 60 concerns, as in Fig. Figure 7 shows the coupling cylinder section 62 on the tip end section 60a side of the covering section 60on the coupling shaft section 53 on the base section side of the head section 51 covered. If the pass advantage 63 , which reduces the diameter of the coupling cylinder section by caulking 62 is trained, into the coupling deepening 54 Once fitted, the coupling shaft section can 53 to the coupling cylinder section 62 be coupled. Even if the head section 51 and the covering section 60 are separated, the head section 51 and the covering section 60 They can be easily coupled.
[0057] Regarding the coupling between the head section and the covering section, in addition to the caulking, which in this embodiment is accompanied by plastic deformation, as in an actuator 20D , who in Fig. As shown in 10, there is an external thread. 55 on the outer circumferential surface53a a coupling shaft section 53D of a head section 51D an external component 50D provided, and an internal thread 62c is on the inner circumferential surface 62a a coupling cylinder section 62D of a covering section 60D provided for, and thus a coupling shaft section can be 53C by screw coupling to a coupling cylinder section 62C be coupled.
[0058] Furthermore, the coupling between the coupling sections, which correspond to the head section and the covering section of the outer component, can be carried out using welding.
[0059] Furthermore, the actuator 20 of the embodiment the housing 22 of the inner component 21 from the metal pipe material 80 formed and features the general cylinder section 27, which is located on the outer circumference of the gas generator 40 is arranged, and the top end cylinder section 24 , which is located on the tip end face of the general cylindrical section 27 is arranged on which end cylinder section 24 a larger diameter than the diameter of the general cylinder section 27 exhibits. The covering section 60 of the outer component 50 is made from the metal pipe component 88 trained, and the reduced-diameter section 64 , which has the reduced diameter, is on the side of the head section 51 arranged on the remote base section side, so that the inner circumferential surface 64a on the sliding surface 27b the outer circumferential surface 27a of the general cylinder section 27 is made slidably movable. The top end cylinder section 24 of the inner component 21and the reduced-diameter section 64 of the outer component 50 represent the SS stop mechanism, in which the stepped section 65 of the reduced-diameter section 64 at the stepped section 25 of the top end cylinder section 24 initiates and the forward movement of the outer component 50 stops when the outer component 50 is moved forward during operation.
[0060] Therefore, in this embodiment, the reduced-diameter section abuts 64 of the outer component 50 , which is moved forward by a predetermined actuation stroke (actuation distance), at the stepped section 25 of the top end cylinder section 24 of the inner component 21 during activation and stops any movement of the head section. 51 of the outer component 50Consequently, the hood opening device U, which is connected to the actuator, can 20 The design allows it to be operated without any problems. Since the housing 22 of the inner component 21 and the covering section 60 of the outer component 50 from the metal pipe materials 80 , 88 are formed, the tip end cylinder section 24 , which, in comparison to the general cylinder section 27 has an enlarged diameter in the housing 22 of the inner component 21 and the reduced-diameter section 64 in the covering section 60 of the outer component 50 can be easily formed by forging.
[0061] Furthermore, the actuator 20 In this embodiment, the waterproof, ring-shaped sealing material 71 over the entire circumference between the inner circumferential surface 62aof the coupling cylinder section 62 of the covering section 60 of the outer component 50 and the outer circumferential surface 53a of the coupling shaft section 53 of the head section 51 arranged.
[0062] Therefore, in this embodiment, the waterproof sealing material 71 between the coupling sections 53 , 62 of the head section 51 , which opens 23 of the inner component 21 covered, and of the covering section 60 of the outer component 50 of the actuator 20 arranged so that rainwater entering from this section does not enter the opening-23 side of the inner component 21 occurs, and thus a deterioration of the contents of the gas generator can occur. 40 This can be prevented. If the sealing material 71 between the coupling sections 53 , 62of the head section 51 and the covering section 60 is arranged, the actuating gas G, which is supplied by the gas generator, can 40 during operation, it should be prevented from reaching the outside of the outer component. 50 to leak, so that a predetermined pressure for the actuating gas G can be stably ensured, and the outer component 50 can be moved forward by a predetermined driving force.
[0063] In the actuator 20 In this embodiment, the covering section 60 of the outer component 50 the enlarged diameter cylinder section 67 , whose diameter is enlarged, so that the gap H between the covering section 60 and the outer circumferential surface 27a of the general cylinder section 27 at the end edge of the head section 51removed reduced-diameter section 64 when opened. The waterproof, ring-shaped sealing material 72 is across the entire circumference between the inner circumferential surface 67a of the enlarged diameter cylinder section 67 and the outer circumferential surface 27a of the general cylinder section 27 arranged so that the gap H is filled.
[0064] Therefore, in this embodiment, the rainwater that flows from the opening end of the covering section can 60 occurs due to the sealing material 72 between the outer circumferential surface 27a of the general cylinder section 27 in the case 22 of the inner component 21 of the actuator 20 and the inner circumferential surface 60c of the covering section 60 of the outer component 50be prevented from entering the head section-51 page of the covering section 60 to occur, and thus the deterioration of the contents of the gas generator can occur. 40 This can be prevented. Since dust can be prevented from entering, sliding surfaces can be used. 64a , 27b between the reduced diameter section 64 of the covering section 60 and the outer circumferential surface 27a of the general cylinder section 27 maintain a smooth state. During operation, the reduced-diameter section can 64 of the covering section 60 easily on the outer surface 27a of the general cylinder section 27 slide, and thus the actuator can 20 exhibit stable, predetermined driving force.
[0065] In this embodiment, because the dust can escape due to the sealing component 72is prevented from entering the inner circumferential surface 60c of the covering section 60 of the outer component 50 also without problems with regard to the outer surface area 24a of the top end cylinder section 24 of the case 22 of the inner component 21 slide.
[0066] In a process for manufacturing the actuator 20 According to the embodiment, the actuator has 20 the inner component 21 and the outer component 50 up. The inner component 21 The cylindrical housing 22 , which is trained to operate the gas generator 40 to keep in it, on which gas generator 40 is designed to generate the actuating gas G during actuation, and which tip end section 22a of the case 22 is open, so that the actuating gas G, which is supplied by the gas generator 40is generated, enabling it to be released from the tip. The outer component 50 indicates the head section 51 , who is trained to open 23 of the case 22 to cover, and the cylindrical covering section 60 , which extends from the outer circumferential edge of the head section 51 extends so that it covers the outer circumferential surface-27a side of the housing 22 covered, on. The outer component 50 This causes the actuating gas G, which is supplied by the gas generator, to 40 is generated, to the inner circumferential surface-60c side of the covering section 60 on the side of the posterior surface of the head section 51 to flow, and moves forward, so that it is separated from the inner component 21 removed. In this embodiment, the housing 22 of the inner component 21 and the covering section 60 of the outer component50 respectively from the metal pipe materials 80 , 88 trained through forging, as in Fig. 6 and Fig. 7 is shown. As in A to C of Fig. As shown in section 5, the head section will be 51 of the outer component 50 from the metal block component 83 formed through forging and cutting. As in Fig. As shown in Figure 7, the coupling sections are 53 , 62 corresponding to the head section 51 and the covering section 60 provided and coupled together, so that the outer component 50 is trained and the actuator 20 is manufactured.
[0067] In the process for manufacturing the actuator 20 According to the embodiment, the inner component 21 from the metal pipe material 80 formed by forging, even if the case 22 , which the gas generator 40it contains a cylindrical structure in which the generated actuating gas G is drawn from the opening 23 at the peak end section 22a is delivered. Since cutting operations that generate cutting waste are avoided where possible, the inner component can be 21 They can be easily manufactured in a resource-saving manner. In the outer component 50 can, since the head section 51 from the metal block material 83 The covering section is formed by forging and cutting, as described above. 60 from the metal pipe material 88 formed by forging, the outer component 50 can also be easily manufactured in a resource-saving manner.
[0068] Therefore, in the process of manufacturing the actuator 20 according to the embodiment of the actuator 20 They can be easily manufactured in a resource-saving manner.
[0069] In this embodiment, the connecting hole 21a and the recording 53b formed by cutting, and another machining process (instead of cutting) can also be used, for example the connecting hole 21a can be formed by stamping or pressing, alternatively the receiving groove can be 53b be trained through roles.
[0070] Although in the actuator 20 In this embodiment, a case in which the present disclosure is contained in the folding device U, which is the hood plate. 7The present disclosure, which is used as an example, can also be used in an actuator of a head protection device that moves a front section of a headrest forward when a vehicle in which the headrest is divided into a front section and a rear section undergoes a collision, or in a knee protection device in which an inner component and an outer component are connected with a knee support plate in front of a seated driver and an instrument panel reinforcement on one side of the body, such that the knee support plate is moved backward when a vehicle undergoes a frontal collision.Furthermore, the actuator of the present disclosure is not limited to the embodiment, as long as the actuator has a configuration in which the gas generator is actuated to move the outer component in relation to the inner component at a predetermined time, and can be used in various vehicle safety devices.
[0071] It is explicitly stated that all features disclosed in the description and / or the claims are intended to be disclosed separately and independently of one another, both for the purpose of the original disclosure and for the purpose of limiting the claimed invention, irrespective of the combination of features in the embodiments and / or the claims. It is explicitly stated that all ranges of values or specifications of groups of objects disclose every possible intermediate value or every possible object in between, both for the purpose of the original disclosure and for the purpose of limiting the claimed invention, in particular for determining the limits of value ranges. QUOTES INCLUDED IN THE DESCRIPTION
[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature
[0000] JP 2015123868 A
[0002] JP 2017180668 A
[0002]
Claims
[1] Actuator (20) with: an internal component (21) comprising a housing (22) having a cylindrical shape, configured to hold a gas generator (40) therein, the gas generator (40) being configured to generate an actuating gas (G) during actuation, and in which a tip end section of the housing (22) is open, so that the actuating gas (G) generated by the gas generator (40) is enabled to be released from the tip end; and an outer component (50) comprising a head section (51) configured to cover an opening of the housing (22) and a covering section (60) having a cylindrical shape extending from an outer circumferential edge of the head section (51) so as to cover an outer circumferential surface side of the housing (22), which outer component (50) causes the actuating gas (G) generated by the gas generator (40) to flow to an inner circumferential surface side of the covering section (60) on one side of a rear surface of the head section (51), and which moves forward so as to be away from the inner component (21), wherein: the head section (51) and the covering section (60) of the outer component (50) are designed as separate components; and the outer component (50) is formed by coupling a coupling section corresponding to the head section (51) and a coupling section corresponding to the covering section (60). [2] Actuator (20) according to claim 1, wherein: the head section (51) of the outer component (50) has a coupling shaft section (53), which serves as the coupling section, on a base section side, which coupling shaft section (53) has a coupling recess (54) which is recessed from an outer circumferential surface side; and the covering section (60) of the outer component (50) on a tip end section thereof has a coupling cylinder section (62) which has a cylindrical shape, which serves as the coupling section and covers an outer circumference of the coupling shaft section (53), which coupling cylinder section (62) has a fitting projection (63) which fits into the coupling recess (54) of the coupling shaft section (53) and is thus coupled to the coupling shaft section (53). [3] Actuator (20) according to claim 1 or 2, wherein: the housing (22) of the inner component (21) is formed from a metal tube material (80) and has a general cylinder section (27) arranged on an outer circumferential side of the gas generator (40) and a tip end cylinder section (24) arranged on a tip end side of the general cylinder section (27), the tip end cylinder section (24) having a larger diameter than the diameter of the general cylinder section (27); the covering section (60) of the outer component (50) is formed from a metal tube component (88), and a reduced-diameter section (64) having a reduced diameter is arranged on a base section side away from the head section (51), so that an inner circumferential surface thereof is made slidably displaceable on an outer circumferential surface of the general cylindrical section (27); and the tip end cylinder section (24) of the inner component (21) and the reduced diameter section (64) of the outer component (50) form a stop mechanism (SS) in which the reduced diameter section (64) abuts the tip end cylinder section (24) and stops a forward movement of the outer component (50) when the outer component (50) is moved forward during an actuation. [4] Actuator (20) according to claim 2 or 3, wherein a waterproof annular sealing material (71) is arranged over an entire circumference between an inner circumferential surface of the coupling cylinder section (62) of the covering section (60) of the outer component (50) and an outer circumferential surface of the coupling shaft section (53) of the head section (51). [5] Actuator (20) according to claim 3 or 4, wherein: the covering section (60) of the outer component (50) has an enlarged-diameter cylinder section (67) whose diameter is enlarged, such that a gap (H) is opened between the covering section (60) and the outer circumferential surface of the general cylinder section (27) at an end edge of the reduced-diameter section (64) located away from the head section (51); and a waterproof annular sealing material (72) is arranged over an entire circumference between an inner circumferential surface of the enlarged diameter cylinder section (67) and the outer circumferential surface of the general cylinder section (27). [6] Method for manufacturing an actuator (20) comprising: an inner component (21) comprising a housing (22) having a cylindrical shape, configured to hold a gas generator (40) therein, the gas generator (40) being configured to generate an actuating gas (G) during actuation, and in which a tip end section of the housing (22) is open so that the actuating gas (G) generated by the gas generator (40) is enabled to be released from the tip end;and an outer component (50) comprising a head section (51) configured to cover the opening of the housing (22) and a covering section (60) having a cylindrical shape extending from an outer circumferential edge of the head section (51) so as to cover an outer circumferential surface of the housing (22), which outer component (50) causes the actuating gas (G) generated by the gas generator (40) to flow to an inner circumferential surface of the covering section (60) on one side of a rear surface of the head section (51) and moves forward so as to be away from the inner component (21), which comprises a method: ; Forming the housing (22) of the inner component (21) from a metal tube material (80) by forging; Forming the covering section (60) of the outer component (50) from a metal tube material (88) by forging; Forming the head section (51) of the outer component (50) from a metal block material (83) by forging and cutting; and Coupling sections are provided according to the head section (51) and the covering section (60) and are coupled together so that the outer component (50) is formed.