CN220955749U - Engine - Google Patents

Abstract

The utility model relates to the field of engines, and discloses an engine, which comprises a valve rocker arm, a valve rocker arm shaft, a rocker arm shaft mounting seat and further comprises the following components: the rib plate is arranged at one of the axial side ends of the rocker shaft mounting seat; the limiting piece comprises two compression ends; the limiting piece is connected with the valve rocker shaft, and two pressing ends of the limiting piece respectively press two sides of the rib plate. The utility model can solve the problems that the prior art can not simply and conveniently solve the problem that the engine is invalid due to the abrasion of the mounting hole of the rocker arm shaft and the breakage of the mounting seat of the rocker arm shaft caused by the rotation of the valve rocker arm shaft.

Description

Engine

Technical Field

The utility model relates to the field of engines, in particular to an engine.

Background

In the high-speed engine of the current mute variable frequency generator set, the valve rocker shaft is subjected to steel heat treatment and has relatively high hardness, the rocker shaft mounting hole on the cylinder head is made of aluminum and has relatively low hardness, and in the use process, the valve rocker shaft and the rocker shaft mounting hole cannot stably and normally operate due to the fact that the rocker shaft mounting hole is easily worn by the rotating valve rocker shaft due to high-speed operation, valve rocker shaft rotation and hardness difference between materials of the valve rocker shaft and the rocker shaft mounting hole, the gap between the valve rocker shaft and the rocker shaft mounting hole is increased, vibration of the valve rocker shaft in the operation process causes impact on the rocker shaft mounting hole, and finally a rocker shaft mounting seat is cracked in rocker shaft mounting Kong Chuduan, so that the valve rocker shaft and a valve cannot stably and normally operate, and the operation of the engine is invalid.

At present, some anti-rotation modes of the valve rocker shaft exist, namely, through holes and threaded holes are mainly formed in a rocker shaft mounting seat and the rocker shaft, and the valve rocker shaft is limited through fastening bolts so as to prevent the valve rocker shaft from rotating and further prevent the rocker shaft mounting hole from being worn. However, this technique has problems in that: the engine assembly process and the manufacturing process are complex. For example, in the prior art CN111774853B, a rocker arm shaft and high strength bolt automatic assembling device for an engine rocker arm is disclosed, the high strength bolt is installed on the rocker arm shaft, but the assembling process is complex, and because the high strength bolt is usually larger in diameter, the diameter of a hole corresponding to the penetrating high strength bolt is also larger, the diameter of the valve rocker arm shaft is also larger, the size of the applicable valve rocker arm shaft is limited, the applicable condition is less, and the wide practicability is not achieved.

In summary, the prior art still cannot simply and conveniently solve the problem that the engine fails due to the fact that the mounting hole of the rocker arm shaft is worn and the mounting seat of the rocker arm shaft is broken when the valve rocker arm shaft rotates.

Disclosure of utility model

The utility model aims to provide an engine so as to solve the problem that the prior art cannot simply and conveniently solve the problem that the engine fails due to the fact that a rocker shaft mounting hole is worn and a rocker shaft mounting seat is broken when a valve rocker shaft rotates.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an engine comprising a valve rocker arm, a valve rocker shaft, and a rocker shaft mount, further comprising:

The rib plate is arranged at one of the axial side ends of the rocker shaft mounting seat;

The limiting piece comprises two compression ends;

The limiting piece is connected with the valve rocker shaft, and two pressing ends of the limiting piece respectively press two sides of the rib plate.

Preferably, as a modification, a stopper is provided at one end of the valve rocker shaft.

Preferably, as an improvement, a plurality of rocker shaft mounting seats are arranged along the axial direction of the valve rocker shaft, the rib plates are positioned between the adjacent rocker shaft mounting seats, and the limiting piece is arranged in the middle of the valve rocker shaft.

Preferably, as an improvement, a radial through hole is formed in the valve rocker shaft, and the limiting piece is arranged in the through hole in a penetrating mode.

Preferably, as an improvement, the limiting piece comprises a straight edge and a bent edge, the straight edge and the bent edge are used as compression ends, the top ends of the straight edge and the bent edge are in arc transition connection, the bent edge comprises at least two bending parts which are propped against the straight edge, the straight edge is arranged in the through hole in a penetrating way and limits the valve rocker shaft between the bent edge and the top end of the straight edge through one of the bending parts, and the two bending parts and the straight edge are clamped on two sides of the rib plate.

Preferably, as a modification, the end of the bending edge is bent towards the side away from the straight edge to form a guide section.

Preferably, as a modification, the stopper is a B-shaped cotter pin.

Preferably, as an improvement, the rib plate and the rocker shaft mounting seat are integrally formed on the cylinder block.

The principle and the advantages of the utility model are: in the prior art, the valve rocker shaft is prevented from rotating by radially penetrating a high-strength bolt to be connected with the cylinder body, so that the structure is complex, the assembly process is complex, and the cost is high. The scheme of the utility model adopts a brand new technical conception, uses the axis parallel surfaces of the valve rocker shaft and the rocker shaft mounting hole as the reference and the limiting support, is simpler and more convenient to process the cylinder body, and in practical application, the limiting piece is matched with the side surfaces of the rib plates to limit the rotation freedom degree of the valve rocker shaft from the two sides of the axis, so that the whole structure is simple, the anti-rotation of the valve rocker shaft is stable and reliable, the assembly operation is only required to complete the insertion of the limiting piece, the operation is simple and convenient, compared with the prior art, the assembly process and the manufacturing process are simplified, and the problem of abrasion and impact fracture between the valve rocker shaft and the rocker shaft mounting hole is effectively solved.

Drawings

Fig. 1 is an assembly view of embodiment 1 of the present utility model.

Fig. 2 is an exploded view of embodiment 1 of the present utility model.

Fig. 3 is an assembly view of a type B cotter pin and a valve rocker shaft in embodiment 1 of the present utility model.

Detailed Description

The following is a further detailed description of the embodiments:

Reference numerals in the drawings of the specification include: the valve rocker arm comprises a valve rocker shaft 1, a through hole 2, a B-shaped cotter pin 3, a cylinder head 4, a rocker shaft mounting seat 5, a rib plate 6, a valve rocker arm 7, a straight edge 31, a bent edge 32, a first bent part 321, a second bent part 322 and a guide section 323.

Example 1, substantially as shown in fig. 1 and 2: an engine comprises a cylinder head 4, valve rocker arms 7, valve rocker arms 1 and rocker arm shaft mounting seats 5 provided with rocker arm shaft mounting holes, wherein the rocker arm shaft mounting seats 5 of the two valve rocker arms 7 are arranged in parallel for the situation of two side by side valve rocker arms 7, the two valve rocker arms 7 are assembled on the same valve rocker arm shaft 1, a through hole 2 is formed in the middle of the valve rocker arm shaft 1, and the through hole 2 is formed in the radial direction. A vertical rib plate 6 is arranged between the rocker arm shaft mounting seats 5 of the two valve rocker arms 7 and is used as a limiting plate, and two side surfaces of the rib plate 6 are used as limiting surfaces. The rib plate 6 is positioned below the axis of the rocker shaft mounting hole, and the rocker shaft mounting seat 5, the rib plate 6 and the cylinder head 4 are integrally formed. After the valve rocker arm 7 is assembled by the valve rocker shaft 1, the B-shaped cotter pin 3 is inserted into the through hole 2 as a limiting member.

In the present embodiment, if two or more valve rocker arms 7 are provided side by side, the rocker arm shaft mounts 5 of the plurality of valve rocker arms 7 are arranged in parallel, one valve rocker shaft 1 is shared by the plurality of valve rocker arms 7, and the rib 6 is provided between any adjacent two of the rocker arm shaft mounts 5. Or a plurality of valve rocker arms 7 are mounted through a plurality of valve rocker shafts 1, and rib plates 6 are arranged between any two adjacent rocker shaft mounting seats 1 corresponding to each valve rocker shaft 1.

As shown in fig. 3, the B-shaped cotter 3 includes a straight edge 31 and a bent edge 32, and the straight edge 31 and the bent edge 32 serve as pressing ends. The straight edge 31 is in arc transition connection with the top end of the bent edge 32, the bent edge 32 comprises two bending parts propped against the straight edge 31, the straight edge 31 is arranged in the through hole 2 in a penetrating way, and the valve rocker shaft 1 is limited between the bent edge 32 and the top end of the straight edge 31 through one of the bending parts 321, so that the B-shaped cotter pin 3 can not rotate relative to the valve rocker shaft 1. The second bending part 322 and the straight edge 31 are clamped at two sides of the limiting plate. The end of the bent edge 32 is bent to the side away from the straight edge 31 to form a guide section 323.

In actual use, during the process of penetrating the B-shaped cotter pin 3 onto the valve rocker shaft 1 and the process of clamping the B-shaped cotter pin 3 onto the rib plate 6, the guide section 323 plays a guiding role, so that the assembly of the B-shaped cotter pin 3 can be completed smoothly. After assembly, part of the valve rocker shaft 1 is positioned in the circular space at the top of the B-shaped cotter pin 3, and the part is limited by one of the bending parts 321, so that the B-shaped cotter pin 3 is prevented from withdrawing from the valve rocker shaft 1. The first bending part 321 simultaneously provides an elastic function for the second bending part 322, so that the second bending part 322 can be effectively pressed on the surface of the rib plate 6, the second bending part 322 and the corresponding straight edge 31 are clamped on two sides of the rib plate 6, the rotation freedom degree of the valve rocker shaft 1 is limited from two sides of the axis of the valve rocker shaft 1, and the valve rocker shaft 1 is prevented from rotating.

In embodiment 2, when a plurality of valve rocker arm seats are not arranged in parallel on a line, valve rocker shafts are required to be used respectively, and the difference from embodiment 1 is that in this embodiment, each valve rocker shaft is required to be provided with a through hole at one end for assembling a B-type cotter pin, each rocker arm shaft mounting seat is provided with a rib plate at one side for matching with the B-type cotter pin, and a circlip is used for the other end of the valve rocker shaft without the through hole for matching with the rocker arm shaft mounting seat.

Example 3 differs from example 2 in that there is only one valve rocker arm, only one valve rocker arm shaft, a through hole is provided at one end of the valve rocker arm shaft for fitting the B-type cotter pin, a rib is provided at one side of the rocker arm shaft mounting seat for fitting the B-type cotter pin, and a circlip is used at the other end of the valve rocker arm shaft not provided with the through hole for fitting the rocker arm shaft mounting seat.

The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (8)

1. An engine comprising a valve rocker arm, a valve rocker shaft and a rocker shaft mount, characterized in that it further comprises:

the rib plate is arranged at one of the axial side ends of the rocker arm shaft mounting seat;

the limiting piece comprises two compression ends;

The limiting piece is connected with the valve rocker shaft, and two pressing ends of the limiting piece respectively press two sides of the rib plate.

2. An engine as set forth in claim 1 wherein: the limiting piece is arranged at one end of the valve rocker shaft.

3. An engine as set forth in claim 1 wherein: a plurality of rocker shaft mounting seats are arranged along the axial direction of the valve rocker shaft, the rib plates are positioned between the adjacent rocker shaft mounting seats, and the limiting piece is arranged in the middle of the valve rocker shaft.

4. An engine as set forth in claim 1 wherein: radial through holes are formed in the valve rocker shafts, and the limiting pieces penetrate through the through holes.

5. An engine as set forth in claim 4 wherein: the limiting piece comprises a straight edge and a bent edge, the straight edge and the bent edge are used as the compression end, the top ends of the straight edge and the bent edge are in arc transition connection, the bent edge comprises at least two bent parts which are propped against the straight edge, the straight edge is arranged in the through hole in a penetrating mode, the valve rocker shaft is limited between the bent edge and the top end of the straight edge through one of the bent parts, and the two bent parts and the straight edge are clamped on two sides of the rib plate.

6. An engine as set forth in claim 5 wherein: the tail end of the bending edge is bent to one side deviating from the straight edge to form a guide section.

7. An engine as set forth in claim 6 wherein: the limiting piece is a B-shaped cotter pin.

8. An engine as set forth in claim 1 wherein: the rib plate and the rocker shaft mounting seat are integrally formed.