Arrangement structure of an actuator in an adjustment member, and method for manufacturing the arrangement structure of an actuator in an adjustment member

Abstract

To provide an actuator arranging structure in an adjusting member, and a corresponding manufacturing method.SOLUTION: An actuator (1) has at least one guide component (4) for guiding an actuator output component. The guide component penetrates at least one first guide opening portion (14) of an actuator housing (3) of the actuator (1) and at least one second guide opening portion (15) of an adjusting member (13). An arranging structure has first attaching means (8) and second attaching means (5). These attaching means can be fixed to the guide component (4) so that the actuator housing (3) can be stress-fixed between the adjusting member (13) and the first and second attaching means (8, 5). The first attaching means (8) penetrates the first guide opening portion (14) of the actuator housing (3) together with the guide component (4), and has a collar (9).SELECTED DRAWING: Figure 2

Description

Technical Field

[0001]

Background Art

[0002] Patent Document 1 discloses a bearing device for an electromechanical brake booster.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

[0004] The disclosure of the present invention relates to an arrangement structure of an actuator in an adjusting member, and the actuator has at least one guiding component for guiding an actuator output component. The at least one guiding component penetrates through at least one first guiding opening of an actuator housing of the actuator and through at least one second guiding opening of the adjusting member. This arrangement structure has a first mounting means and a second mounting means, and these mounting means can be fixed to the guiding component such that the actuator housing is stress-fixed between the adjusting member and the first and second mounting means. The first mounting means has a collar that penetrates through the first guiding opening of the actuator housing together with the guiding component and is received in proportion into the second guiding opening of the adjusting member.

[0005] The actuator can cause force transmission to the actuator output component starting from, for example, a motor. At this time, the actuator output component can directly or indirectly transmit the force so as to go out from the actuator. This may be, for example, a transmission plate that is guided by the guiding component of the actuator and movably supported. At this time, the guiding component may be correspondingly coupled to or can be coupled to the housing part of the actuator, and may have, for example, a threaded area for accommodating nuts for attachment, and may be provided in the form of a metal rod. Such an actuator may be a brake booster of an automobile. At this time, the actuator can generate a braking force by an electric motor and can transmit this through the output component. The adjusting member can be understood to be, for example, a hydraulic cylinder having a piston that receives the actuator force and generates pressure through a working fluid. The adjusting member may be the master brake cylinder of a hydraulic brake system.

[0006] The mounting means may be provided in the form of a screwable nut that can be screwed onto the guiding component, for example. The adjusting member can be stress-fixed to the actuator housing, particularly in the mounting area - for example, the mounting flange of the adjusting member - between two nuts. If the guiding opening is penetrated by the collar of the first mounting member, a space-saving configuration of the coupling location can be achieved in this way, and at the same time, there is an advantage that the need for a seal can be considered in the coupling area that is vulnerable to the influence between the adjusting member and the actuator.

[0007] In a preferred embodiment, the collar of the mounting means has an internal thread, and the mounting means can be screwed onto the threaded area of the guiding component by this internal thread. In this way, the position of the mounting means on the guiding component can be accurately adjusted, and an easily adjustable assembly is possible.

[0008] At the joint between the adjusting member and the actuator, the influence of the external weather, such as moisture and dirt particles, can be harmful to the interior of the actuator. Therefore, it is preferable that a seal layer is provided in the thread region, and the seal layer seals the first sealing path between the mounting means and the guide component when the mounting means is screwed in. The seal in the thread region has the advantage that it enables a sealing action between the nut and the guide component after screwing. Furthermore, the seal acts to strengthen the fixing of the mounting means and prevent the relaxation / position change of the mounting means.

[0009] Mechanical deformation in the thread region has the advantage of enhancing the fixing of the mounting means on the guide component, which results in a longer service life of the actuator in relation to the adjusting member. This is especially because the nut is maintained in the position adjusted during assembly in this way, and thus accurate positioning of the actuator housing and the adjusting member becomes possible, for example, in the form of a stopper during assembly.

[0010] In a preferred embodiment, the second guide opening has a first region with a first extension and a second region with a second extension. In the first region, the guide component is received together with the collar of the first mounting means (8). And in the second region, the guide component is received without a collar. Thereby, a space-saving arrangement of the first mounting means is possible in the connection region between the adjusting member and the actuator. The second guide opening may be provided as a stepped hole.

[0011] In another embodiment, the mounting means has a recess surrounding the collar. This recess is delimited laterally on the one hand by the collar and on the other hand by a raised portion surrounding the collar radially. The collar has an extension that is larger than that of the radially raised portion in the assembly direction. By providing the radially raised portion, the support of each part to be joined, i.e., the adjusting member and the actuator housing, at the first nut can be added and ensured with accurate positioning. Further, the raised collar having a relatively large extension can ensure the accurate alignment of the guiding component parts with respect to both component parts to be joined by passing through the first guiding opening and by entering the second guiding opening. The recess formed between the radially raised portion and the collar provides a space for accommodating another component part that can be usefully accommodated in the recess when the adjusting member comes into contact with the actuator housing, directly in the mounting member.

[0012] In a preferred embodiment, a sealing member that seals the second sealing path between the mounting means and the actuator housing and produces a sealing action when the adjusting member and the actuator housing are stress-fixed is accommodated in the recess. In particular, when the adjusting member and the actuator housing are stress-fixed, a sealing action is produced between the collar, the recess, and the inner surface of the actuator housing. In this way, the existing sealing path can be easily sealed. Further, a sealing member, for example in the form of an O-ring, which is mounted on the nut before or after screwing the nut, can comfortably and simply ensure sealing in the narrow design space of the joint between the adjusting member and the actuator, especially since the guiding component parts and the collar are already accommodated in the guiding openings of the actuator housing in this area. Since the sealing is produced when the stress-fixing is done, no additional working steps are required.

[0013] In an embodiment of this arrangement structure, when the adjusting member and the actuator housing are stress-fixed, the radial ridges of the mounting means ensure force support along the assembly direction for the actuator housing and the adjusting member. In this way, stress fixation of each component can be generated by the first and second mounting means, and when the second mounting means is screwed into the correct position on the side of the first mounting means, corresponding back pressure exists.

[0014] The chamfer provided in the end region of the female thread of the first mounting means, which faces towards the inside of the actuator housing and whose opening expands in the direction of the inside of the actuator housing, prevents excessive material peeling of the sealing layer during screwing of the first mounting means, and thereby has the advantage of preventing the material of the sealing layer from reaching the inside of the actuator during screwing.

[0015] In the method of the present invention for manufacturing the arrangement structure of the actuator in the adjusting member, the guiding component parts of the actuator are aligned, the first mounting means is attached to the guiding component parts, and the actuator housing is positioned by the first guiding opening of the actuator housing in the guiding component parts. The first mounting means has a collar that penetrates the first guiding opening of the actuator housing together with the guiding component parts. The adjusting member is positioned by the second guiding opening of the adjusting member in the guiding component parts, and the collar is received in proportion into the second guiding opening of the adjusting member together with the guiding component parts. Further, between the first mounting means and the second mounting means attached to the guiding component parts, the adjusting member is stress-fixed to the actuator housing.

[0016] In this way, there is an advantage that the exact positioning of each component involved - namely the guide component, the actuator housing, and the adjusting member - is mutually performed and the fixing is also similarly performed. In addition to this, the best centering is guaranteed. This is because the collar passes through the guide opening of the actuator housing and enters the guide opening of the adjusting member. Furthermore, if the collar extends in the direction of each component to be joined, the design space is reduced. In addition to this, in this way, more guide paths can be provided in the guide component, and the guide paths do not have to be occupied by the collar - and the corresponding thread of the guide component.

[0017] Furthermore, it is preferable that when the first mounting means is mounted on the guide component, the mounting means already has a sealing member, or the sealing member is mounted on the mounting means after the first mounting means is mounted on the guide component. The sealing member can seal the sealing path between the mounting means and the actuator housing, and a sealing action is generated when the adjusting member and the actuator housing are stress-fixed. In particular, a sealing action is generated between the collar of the mounting means, the inner surface of the actuator housing, and the recess of the mounting means surrounding the collar. The inner surface of the actuator housing can be understood to be the wall side of the actuator housing facing the inside of the actuator in this case.

[0018] Next, embodiments of the present invention will be described with reference to the drawings.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Best Mode for Carrying Out the Invention

[0020] FIG. 1 shows a partial view of a known electric brake booster 1 disclosed in Patent Document 1, which is mechanically coupled to a master brake cylinder via two screw joints by mounting screws 5 and 8. The screws 5 and 8 are screwed onto the respective threads of the guide portion 4 for mounting, and at this time, a part of the housing 3 of the brake booster 1 is stress-fixed and fixed to a part of the master brake cylinder 13. The guide component 4 guides the sliding bearing 30 in a well-known manner, and the sliding bearing is operatively coupled to the support plate 34. Through the support plate, the reaction disk 31 of the electric brake booster 1 can be biased by an electric motor. The output member 32 of the brake booster 1 can be offset via the reaction disk 31, and the input piston 33 of the master brake cylinder 13 can be operated by the output member. The reaction disk 31 can be additionally biased by force directly or indirectly by the input piston 35 operated by the driver of the vehicle.

[0021] FIG. 2 shows the arrangement structure of the actuator 1 in the adjusting member 13, taking the brake booster 1 in relation to the master brake cylinder 13 as an example here. The housing portion 3 of the brake booster 1 has an opening 14. Through the opening 14, a part of the guide component 4, particularly the end of the guide component 4, protrudes. The guide component 4 may be coupled to another housing portion (not shown) of the brake booster to which the housing portion 3 is to be attached. As described with respect to FIG. 1, the guide component 4, which may exist particularly in duplicate, guides the components that can be offset by the motor of the brake booster. As shown in FIG. 1, the guide component 4 can guide the sliding bearing 30 that is operatively coupled to the support plate 34, and through the support plate, the output member 32 of the electric brake booster 1 can be directly or indirectly biased via the reaction disk 31 of the electric brake booster 1 by an electric motor.

[0022] The end of the guide component 4 passing through the opening 14 also passes through the opening 15 of the master brake cylinder 13 that abuts against the housing portion 3 of the brake booster 1.

[0023] The guide component 4 has a first threaded region 11 and a second threaded region 12. Mounting means such as nuts 5 to 8 can be screwed onto the threaded regions 11 and 12. For this purpose, the first threaded region 11 is at least partially inside the housing 3 of the brake booster. The second threaded region 12 is outside the housing 3 of the brake booster 1 and is at least partially outside the opening 15 of the master brake cylinder 13 on the side facing away from the housing 3 of the brake booster 1.

[0024] The first mounting means 8 may be provided as a nut screwed onto the guide component 4 in the region of the first threaded region 11.

[0025] The second mounting means 5 may also be provided in the form of a nut 5, and this can be screwed into the guide component 4 in the region of the thread 12 from the direction of the master brake cylinder 13.

[0026] By screwing the mounting means 5 and 8 into the guide component 4, the housing 3 is stress-fixed to the master brake cylinder 13 between the two mounting means 5 and 8.

[0027] The first mounting means 8 has the shape described below. In the outer region of the first mounting means 8, this mounting means has a radially extending ridge 7. At the center of the mounting means 8, this mounting means has an opening that can accommodate the guide component 4. The central opening of the mounting means 8 is surrounded by another radially extending ridge 9, which can also be understood as a collar 9. The collar 9 has a greater extension in the ridge direction (direction x in FIGS. 2, 3, and 4) than the radially extending ridge 7. There is a recess 16 that also extends radially between the radially extending ridge 7 and the collar 9. On the inner wall of the collar 9 facing the opening, there is a thread configured to substantially correspond to the thread region 11. The mounting means 8 is shown separately again in FIG. 3.

[0028] The shape of the mounting means 8 supports the mounting of the master brake cylinder 13 to the housing 3 of the brake booster 1.

[0029] When assembling the master brake cylinder 13 and the brake booster 1, the mounting means 5 and 8 are screwed into the guide component 4. After screwing, the mounting means 5 and 8 move closer to each other. The housing 3 of the brake booster 1 is stress-fixed to the master brake cylinder 13. At this time, the radially extending outer ridge 7 of the mounting means 8 provides a contact portion for the housing 3 of the brake booster 1, and also provides a support portion for the region 17 of the master brake cylinder 13 arranged to face the ridge 7 on the opposite side of the housing 3, especially facing the opposite of the brake booster 1.

[0030] The recess 16 of the mounting member 8 contains the seal member 6, which is compressed during assembly, thereby sealing the internal space of the housing 3 of the brake booster 1. In this way, the internal space of the brake booster 1 is protected from the influence of the weather. The seal member 6 is compressed between the inner surface of the housing wall 3, the bottom surface of the recess 16, and the outer wall of the collar. Thereby, the first seal path in the coupling region between the brake booster 1 and the master brake cylinder 13, which can cause a connection to the internal space of the brake booster 1, is sealed. As the seal member 6, an O-ring that is sufficiently elastic to be deformed during assembly can be used.

[0031] Another seal path extends between the inside of the collar 9 and the guide component 4. In the region of the threaded area 11, the seal layer 10 is mounted on the male thread 11 of the guide component 4, and this seal layer is compressed when the mounting means 8 is screwed onto the guide component 4, resulting in sealing in this region. At this time, the seal layer 10 may be made of, for example, polyamide, and in addition to the sealing function, a clamp that improves the holding between the threaded area 11 and the mounting means 8 is added. Similarly, this coating may be provided in the form of microencapsulation including an adhesion function.

[0032] The collar 9 of the mounting means 8 penetrates the opening 14 of the housing portion 3 of the brake booster 1. The opening 15 of the master brake cylinder 13 is configured in a stepped shape, having a relatively large radius R1 in the front region 18 and a relatively small radius R2 in the rear region 19.

[0033] The collar 9 of the mounting means 8 penetrates the opening 14 when the mounting means 8 is in the assembled state and protrudes into the front region 18 of the opening 15 of the master brake cylinder 13.

[0034] Figure 4 shows again, in a separate drawing, together with the mounting means 5 and 8, the connection point between the brake booster 1 and the master brake cylinder 13. Here, the mounting means 8 has a chamfer on the side facing away from the master brake cylinder 13, for example, a chamfer of 1.2 mm × 45°. At this time, 45° corresponds to the chamfer angle, and 1.2 mm corresponds to the chamfer width. Such a type of chamfer can prevent excessive material peeling of the seal layer 10 in the thread region 11 when the mounting means 8 is screwed in, which may lead to inconvenient dirt inside the brake booster 1.

[0035] Furthermore, the guide component 4 may have a thread deformation part 20 that may be provided multiple times along the circumference of the guide component 4 in the region of the thread region 11. In this way, when the mounting means 8 is screwed in, additional fixing of the mounting means 8 on the guide component 4 can be realized. The thread deformation part 20 can be manufactured, for example, using a reamer in the form of a press-fitting part, and in particular, can be provided in a triple distribution along the circumference. The distribution of the thread deformation part 20 along the circumference is shown in Figure 5, which corresponds to the cross-section of the guide component perpendicular to the longitudinal direction x of the guide component 4.

[0036] As an alternative, a mechanical deformation part 20 may exist such that the pitch of one partial region of the thread 11 is different from the rest of the thread 11, especially in the region of a 360° rotation of the spring thread. The deformation in this case can also be understood as a prior deformation within the framework of the manufacture of the thread 11, and one partial region has a different pitch from the beginning.

[0037] Next, the method procedure for assembling the actuator 1 in the adjusting member 13 will be described with reference to Figure 6.

[0038] In step 201, the guide component 4 is prepared and aligned together with the other parts of the housing of the brake booster 1. Subsequently, in each subsequent step, it is intended to attach the housing part 3 and the master brake cylinder 13.

[0039] In step 202, the mounting means 8, i.e., the nut shown in FIG. 3, is externally fitted onto the guiding component 4. At this time, the screw fitting is performed until the nut 8 occupies the target position on the guiding component 4. In this way, a predetermined position of the nut with respect to the housing of the brake booster is realized, thereby providing an accurate position for each component - the housing 3 to be mounted and the master brake cylinder 13 - to be mounted, or, in other words, providing an accurate stopper. By performing the screw fitting, as described above, the first sealing also occurs in the thread region 11 of the guiding component 4 by the sealing layer 10.

[0040] In step 203, the sealing member 6 is inserted into the corresponding recess 16 of the mounting means 8. As an alternative, the sealing member 6 may already be mounted on the mounting means 8, and the mounting means 8 is screw - fitted together with the sealing member 6 in step 202.

[0041] In step 204, the guiding component 4 is aligned so that it can penetrate through the corresponding openings 14 and 15 of the housing 3 and the master brake cylinder 13. Since the nut 8 can be received in the opening 14 with the collar 9, accurate alignment of the housing 3 with respect to the remaining housing portion of the brake booster 1 is possible. The master brake cylinder 13 can also be accurately aligned by accommodating the guiding component 4. In this way, by accommodating the guiding component 4 together with the mounting means 8 in both openings 14 and 15, accurate positioning of the components involved with each other can be performed. As an alternative or addition thereto, the master brake cylinder 13 can be positioned and aligned by the central hole on the end - face side of the housing portion 3.

[0042] In step 205, the housing portion 3 is arranged on the guiding component 4. By this mounting, accurate alignment of each component with respect to each other, particularly with respect to the remaining housing portion of the brake booster 1, is also performed as described above.

[0043] In step 206, the master brake cylinder 13 is attached to the guide component 4 by pushing open the opening 15 by the guide component 4. When the master brake cylinder is pushed open to a sufficient extent, the collar 9 comes into the interior of the opening 15 of the master brake cylinder 13 according to the ratio.

[0044] In step 207, the guide component 4 which already has the mounting means 8, that is, the nut 8, is stress-fixed to the housing portion 3 and the master brake cylinder 13 by screwing another nut 5 onto the guide component 4. By screwing another nut 5, the housing portion 3 and the master brake cylinder 13 are pressed against each other, and at the corresponding location, as described above, the seal member 6 is compressed in the recess 16 of the nut 8. Thereby, the sealing effect is brought about at other locations of the arrangement structure of the master brake cylinder 13 in the housing portion 3 of the brake booster 1.

[0045] Incidentally, the brake booster 1 can have such a plurality of guide components 4, particularly two guide components 4, in order to realize the corresponding arrangement structure of the master brake cylinder 13 in the brake booster 1.

Description of the reference numerals

[0046] 1 Actuator 3 Actuator housing 4 Guide component 5 Mounting means 6 Seal member 7 Protrusion 8 Mounting means 9 Collar 10 Seal layer 11 Threaded area 13 Adjusting member 14 Guide opening 15 Guide opening 16 Recess 18 First area 19 Second area 20 Deformed part 21 Chamfer 22 female screw

Claims

1. The arrangement structure of the actuator (1) in the adjusting member (13), wherein the actuator (1) has at least one guiding component (4) for guiding the actuator output component, at least one of the guiding components (4) penetrates through at least one first guiding opening (14) of the actuator housing (3) of the actuator (1) and at least one second guiding opening (15) of the adjusting member (13), the arrangement structure has a first mounting means (8) and a second mounting means (5), and these mounting means can be fixed to the guiding component (4) such that the actuator housing (3) is stress-fixed between the adjusting member (13) and the first and second mounting means (8, 5). In the arrangement structure, the first mounting means (8) has a collar (9) that penetrates through the first guiding opening (14) of the actuator housing (3) together with the guiding component (4) and protrudes into the second guiding opening (15) of the adjusting member (13). The arrangement structure is characterized by this.

2. The collar (9) of the mounting means (8) has an internal thread (22), and the mounting means (8) can be screwed onto the threaded area (11) of the guiding component (4) by the internal thread. The arrangement structure according to Claim 1 is characterized by this.

3. A sealing layer (10) is provided in the area of the threaded area (11), and when the mounting means (8) is screwed on, the first sealing path between the mounting means (8) and the guiding component (4) is sealed by the sealing layer. The arrangement structure according to Claim 2 is characterized by this.

4. At least one mechanical deformation part (20) is provided in the threaded area (11) in the area of the threaded area to strengthen the fixing of the mounting means (8) on the guiding component (4). The arrangement structure according to Claim 2 or 3 is characterized by this.

5. The second guiding opening (15) has a first area (18) with a first extension (R1) and a second area (19) with a second extension (R2). The first area (18) houses the guiding component (4) and the collar (9) of the first mounting means (8), and the second area (19) houses the guiding component (4) without the collar (9). The arrangement structure according to Claim 1 is characterized by this.

6. The mounting means (8) has a recess (6) surrounding the collar (9), the recess being delimited laterally on the one hand by the collar (9) and on the other hand by a ridge (7) surrounding the collar (9) radially, and in particular the collar (9) having a greater extension in the assembly direction (x) than the ridge (7), the arrangement structure according to any one of claims 1 to 5.

7. A sealing member (6) is received in the recess (16), the sealing member sealing a second sealing path between the mounting means (8) and the actuator housing (3), the sealing member creating a sealing action when the adjusting member (13) and the actuator housing (3) are stress-fixed, and in particular a sealing action being generated between the collar (9), the recess (16), and the inside of the actuator housing (3) when the adjusting member (13) and the actuator housing (3) are stress-fixed, the arrangement structure according to claim 6.

8. The mounting means (8) has a ridge (7) surrounding the collar (9) radially, the ridge forming a force support along the assembly direction (x) for the actuator housing (3) and the adjusting member (13) when the adjusting member (13) and the actuator housing (3) are stress-fixed, the arrangement structure according to claim 1.

9. A chamfer (21) is provided in the end region of the female thread (22) facing the inside of the actuator housing (3), the opening of the chamfer expanding in the direction of the inside of the actuator housing (3), the arrangement structure according to claim 2.

10. In a method of manufacturing an arrangement structure of an actuator (1) in an adjusting member (13), the following steps, namely, the guiding components of the actuator (1) are aligned (201), a first mounting means (8) is attached to the guiding components (4) (202), the actuator housing (3) is positioned by the guiding components (4) by means of a first guiding opening (14) of the actuator housing (3) (205), the first mounting means (8) having a collar (9) passing through the first guiding opening (14) of the actuator housing (3) together with the guiding components (4), The adjustment member (13) is positioned (206) by the guide component (4) by means of a second guide opening (15) of the adjustment member, and the collar (9) penetrates into the second guide opening (15) of the adjustment member together with the guide component (4), A method including the step of stress-fixing the adjustment member (13) to the actuator housing (3) between a first mounting means (8) and a second mounting means (5) which are attached to the guide component (4). [

11. ] When the first mounting means (8) is attached to the guide component (4) (202), the first mounting means (8) already has a sealing member (6), or after the first mounting means (8) is attached to the guide component (4), the sealing member (6) is attached to the first mounting means (8), and the sealing member (6) can seal a sealing path between the first mounting means (8) and the actuator housing (3), and a sealing action occurs when the adjustment member (13) and the actuator housing (3) are stress-fixed (207). The method according to claim 10.

Images