阅读说明：本技术 内燃机的可变气门传动装置的组件 (Assembly of variable valve gear of internal combustion engine ) 是由 迪米特里·舍特 哈拉尔德·埃伦特 于 2020-03-12 设计创作，主要内容包括：本发明涉及内燃机的可变气门传动装置的组件(1),该组件带有至少一个平行地布置在内燃机的缸盖上的推条(2),该推条(2)具有用于受e致动器(A)的作用而使其纵向移位的接触面(3),并且单独的调节板(4)悬挂在该推板上,其中每个调节板在其自由的端部(5)上均具有接触面(6),用以作用到向相同作用的换气气门进行加载的一列能切换的气门压杆中的至少一个能切换的气门压杆(8)的联接滑动器件(7)上。各个调节板(4)在其面朝推条(2)的端部(9)上成为弯曲的末端条带(10),该末端条带在推条(2)的其中一个纵向侧(11、12)上通过铆接连接(13)紧固。(The invention relates to an assembly (1) of a variable valve drive of an internal combustion engine, comprising at least one push rod (2) arranged parallel to a cylinder head of the internal combustion engine, wherein the push rod (2) has a contact surface (3) for longitudinal displacement thereof by an e-actuator (A), and wherein individual adjusting plates (4) are suspended on the push plate, wherein each adjusting plate has a contact surface (6) at its free end (5) for acting on a coupling slide (7) of at least one switchable valve lever (8) of a row of switchable valve levers that act on identically acting gas exchange valves. Each adjusting plate (4) is formed at its end (9) facing the push bar (2) as a curved end strip (10) which is fastened on one of the longitudinal sides (11, 12) of the push bar (2) by a riveted connection (13).)

1. Assembly (1) of a variable valve gear of an internal combustion engine with at least one push bar (2) arranged in parallel on a cylinder head of the internal combustion engine, the push bar (2) having a contact surface (3) for longitudinal displacement thereof under the action of an e-actuator (A), and from which a separate adjusting plate (4) is suspended, wherein each adjusting plate has a contact surface (6) on its free end (5) for acting on a coupling slide (7) on at least one switchable valve strut (8) of a train of switchable valve struts loading identically acting gas exchange valves, characterized in that each adjusting plate (4) ends on its end (9) facing the push bar (2) with a bent end strip (10) which ends on one of the longitudinal sides (11, 11) of the push bar (2), 12) Is fastened by at least one riveted connection (13).

2. Assembly according to claim 1, characterized in that the respective adjusting plate (4) extends through the slot (14) of the push bar (2) and is fixed with its end strip (10) on the upper longitudinal side (11) of the push bar.

3. Assembly according to claim 2, characterized in that the slit (14) of the push bar (2) encloses the respective adjusting plate (4) "tightly".

4. Assembly according to claim 1, characterized in that at least one additional pin connection (15) extends through the end strip (10) of the respective regulating plate (4) and the push strip (2).

5. Assembly according to claim 1, characterized in that the head (16) of the rivet (17, 18) of the riveted connection (13) projecting from the push bar (2) is at the same time a spacer for the surrounding structure.

6. Assembly according to claim 1, characterized in that the end strip (10) of each adjusting plate (4) is fastened either in a complementary recess of the push bar (2) or between the ridges of the push bar (2).

7. Assembly according to claim 1, characterized in that the adjusting plate (4) is a sheet spring tongue.

8. An assembly according to claim 1, characterized in that the push bar (2) is in a carrier frame (19) engageable with the cylinder head, said carrier frame being provided with a bearing slot (20) for longitudinally guiding the push bar (2).

9. An assembly according to claim 1, characterized in that the contact surface (3) of the push bar (2) for the e-actuator (a) is a single-ended protruding bend.

10. Assembly according to one of the preceding claims, characterized in that for producing the riveted connection (13) either a) a one-piece solid rivet or blind rivet (17, 18) is provided, or b) a multi-piece closed loop-stud connection is provided, or c) the riveted connection (13) is combined with a press-bent connection.

Technical Field

The invention relates to an assembly of a variable valve drive of an internal combustion engine, comprising at least one push rod which can be arranged in parallel on a cylinder head of the internal combustion engine and has a contact surface for the longitudinal displacement of an e-actuator, and on which push plate individual actuating plates are suspended, wherein each actuating plate has a contact surface at its free end for acting on a coupling slide of at least one switchable valve push rod of a row of switchable valve push rods which act on identically acting gas exchange valves.

Background

Generic components in the mounted state on a cylinder head are known from DE 102017101792B 4 in fig. 1, 1 a. Such a complete unit with switchable, longitudinally or transversely lockable valve struts, if appropriate with supporting elements for the valve struts, and with an e-actuator, is also referred to as an e-Rocker module (e-Rocker-module). The respective adjusting plate is thereby inserted as loosely as possible through the transverse slot of the central push rod and is held by a spring clip projecting into the transverse slot. The spring clip is fixed in the constriction of the push bar by legs which project and are bent transversely from this spring clip.

Disclosure of Invention

The object of the invention is to provide an assembly whose adjusting plate is particularly simple and positionally accurate in connection with the push bar.

According to the invention, this object is achieved in that the respective adjusting plate is formed on its end facing the push rod as a curved end strip which is fastened to one of the longitudinal sides of the push rod by means of at least one riveted connection.

Based on this design, a simple, durable and extremely positionally accurate connection of the adjusting plate on the push bar is created. The proposed riveted connection then allows a particularly wide choice of the materials of the push strip and the adjusting plate that differ from one another and their dimensioning. It is obvious that the entire assembly can be delivered to the cylinder head of the internal combustion engine completely preassembled with the adjusting plate and can be finally mounted there.

According to one embodiment of the invention, instead of a pure rivet connection, which can be created, for example, by means of solid or hollow rivets or a two-part rivet connection such as blind rivets, a so-called clinch rivet connection (clinchnietverbindunng), in which a cylindrical part is pressed into the end strips and the adjusting plate, for example, by an embedding process and which is sold under the trade name "ClinchNiet" by the german company "PRESSOTECHNIK", is also considered.

An alternative arrangement of the tip on the upper side of the push bar has proven to be advantageous. Since the adjusting plates in this case extend through the transverse slots of the push bar, additional fastening and better position assignment is thus achieved. This is especially the case if the slot surrounds the adjusting plate to some extent without play ("tightly" (sanugend)), as is further proposed. It is obvious here that individual slots in the push bar can also be dispensed with. The end of the adjusting plate in this case surrounds one of the longitudinal sides of the push bar and is then riveted on the upper or lower side of the push bar.

In a further embodiment of the invention, it is proposed that the end strips of the individual adjusting plates are assigned to one another by means of additional machine elements, such as pins. Instead of pins, screws, embedded points, etc. may also be used. At least one additional press-bending connection may also be used.

Recesses or elevations for the end strips are also proposed above or below the push strip in order to arrange and fasten the end strips precisely to the point on the push strip.

In a further embodiment of the invention, the head of each rivet, for example a semicircular head, also acts as a spacer for the surrounding structure. Here, for example, a second push bar which forms a composite structure with the "first" push bar is also considered, but alternatively a guide on the internal combustion engine side is also considered.

According to a preferred embodiment, the push bar with the adjusting plate thereon is also located in a support frame, which can be connected to the cylinder head. This eliminates the need for expensive guide parts on the cylinder head, which guide parts need to be installed afterwards. Suitable linear guides for the pushers, such as sliding guides or rolling guides, can be prepared in the frame itself.

The adjusting plate may be as rigid a member as possible. However, it is particularly preferred if the adjusting plate is designed as a spring tongue.

A cost-effective interface for the contact surfaces of an e-actuator, which may alternatively also be a hydraulic or pneumatic actuator, is the subject of a further dependent claim. The one-piece bent tab thus projects over the end of the push bar. The tab can alternatively also be located on another longitudinal section of the push bar or be designed as a separate sheet metal part or the like. The e-actuator may extend flush or parallel with the push bar. This e-actuator alternative may be mounted orthogonally, askew or the like; for example, depending on the available installation space. It is also provided that the actuator does not act directly on the contact surface of the push rod, but that an intermediate element is used here.

The riveted connection described here is considered to be a particularly advantageous connection of the actuating plate to the push bar. But also screw connections, clamps, welds or combinations thereof etc. are contemplated.

Drawings

FIG. 1 shows an assembly with a carrying frame in a spatial view;

FIG. 2 shows an enlarged cross-section of FIG. 1 with a switchable valve stem and support member;

FIG. 3 shows a variant of the riveted connection of the adjustment plate to the push bar; and is

Fig. 4 shows a further variant of the rivet connection of the adjusting plate to the push bar and to the additional pin.

Detailed Description

Fig. 1, 2 disclose an assembly 1 of a variable valve gear of an internal combustion engine. The assembly 1 is depicted with a push bar 2 guided in a bearing slot 20 of a carrier frame 19 and is ready for mounting laterally along the cylinder head of an internal combustion engine (see also fig. 1 of DE 102017101792B 4).

The push bar 2, which is present here as a sheet metal strip, has a contact surface 3, which is designed as a curved web, at the end shown on the right in fig. 1 and is intended to be longitudinally displaced in one direction by the e-actuator a. The return of the push bar 2 is effected by a mechanical spring means, not shown.

As can be seen from all the figures, a separate adjusting plate 4, which is embodied as a plate spring tongue, is suspended on the push bar 2. Each actuating plate acts during operation via a contact surface 6 embodied at its free end 5 on a laterally extending coupling slide 7 of a switchable valve rod 8 (see fig. 2), which is a component of a row of switchable valve rods (three here) that act on the same gas exchange valve.

As can be seen from all the figures, the respective adjusting plate 4 is guided "tightly" on its end 9 facing the push bar 2 through the slot 14 of the push bar 2 and rests with a bent end strip 10 on the upper longitudinal side 11 of the push bar 2. Each adjusting plate 4, more precisely the end strip 10 of the adjusting plate, is firmly connected to the push bar 2 by a riveted connection 13. A blind rivet 18 is used for the riveted connection 13 according to fig. 3, and a solid rivet 17 with a semicircular head 16, which projects here from the lower longitudinal side 12 of the push rod 2, is used according to fig. 4. By means of which the push bar 2 can be held spaced apart from an ambient component, such as another push bar.

Fig. 4 also shows that the adjusting plate 4 is aligned precisely by its end strip 10 on the push bar 2, additionally by means of the pin connection 15.

List of reference numerals

1 assembly

2 push strip

3 contact surface

4 adjusting plate

5 end of

6 contact surface

7-link sliding device

8 air valve compression bar

9 end part

10 end strip

11 upper longitudinal side

12 lower longitudinal side

13 riveted connection

14 seam

15 pin connection

16 head

17 rivet (solid rivet)

18 rivet (hollow rivet)

19 bearing frame

20 support slot

A e actuator