CN209671024U - One kind rises disconnected formula camshaft mounting structure - Google Patents

Abstract

The utility model belongs to engine manufacturing technology field, it include cylinder head, Cam bearing pedestal and camshaft bearing lid more particularly to one kind disconnected formula camshaft mounting structure that rises, the Cam bearing pedestal and the cylinder head are integrally formed, the camshaft bearing lid goes up from the Cam bearing pedestal and breaks, and the camshaft bearing lid and the Cam bearing pedestal pass through the disconnecting contacting surface that rises and cooperate.Using Cam bearing pedestal and cylinder head integrated formed structure and the disconnected formula camshaft bearing lid structure that rises, camshaft bearing lid and cylinder head cooperation precision are high, and integrated level is high, has simplified processing and assembly technology, has reduced costs.

Description

One kind rises disconnected formula camshaft mounting structure

Technical field

The utility model belongs to engine manufacturing technology field, and in particular to one kind rises disconnected formula camshaft mounting structure.

Background technique

In the installation of multicylinder engine overhead camshaft, camshaft installation accuracy is more demanding, and camshaft bearing sheet is only Match boring with cylinder cap after processing, processing technology is complicated, and required precision is high, at high cost.To solve the problems, such as that rocker arm axle misalignment is big, The requirement on machining accuracy of part is reduced, the disconnected formula camshaft bearing lid structure that rises can be used in simplified installation.The structure is disconnected by rising Technique makes to be that whole bearing blank part separates up and down originally, then again closes separated bearing with bolt by bearing bolt hole Get up and bearing is machined out, bolt is unclamped after processing and removes camshaft bearing.Each bearing is powder smelting Golden material, has no progeny through rising, then by the effect of bolt power, the bearing upper and lower bonding surfaces after fission can be engaged on one well It rises.As Chinese patent CN203891953U discloses a kind of cam axle fixing structure used for diesel engine, first bearing, the second axis It holds, 3rd bearing, fourth bearing and 5th bearing are the disconnected formula separate structure that rises.First bearing, second bearing, 3rd bearing, Fourth bearing and 5th bearing include support base and the bearing inner race among support base.First bearing, second bearing, The bearing inner race of three bearings, fourth bearing and 5th bearing is equipped with disconnected processing of rising at the bearing upper and lower bonding surfaces of separate structure Slot.But there are still deficiency, bearing block and cylinder head for the structure using seperated design, and bearing block still needs to pacify using bolt and positioning pin On cylinder, installation accuracy requires high, complex process, higher cost.

Utility model content

The one kind that the utility model provides rises disconnected formula camshaft mounting structure, is integrally formed using Cam bearing pedestal and cylinder head Design structure and the disconnected formula camshaft bearing lid structure that rises, camshaft bearing lid and cylinder head cooperation precision are high, and integrated level is high, anti-Transverse Shear It is strong to cut ability, has simplified processing and assembly technology, has reduced costs.

One kind rises disconnected formula camshaft mounting structure, including cylinder head, Cam bearing pedestal and camshaft bearing lid, the camshaft It holds seat and the cylinder head is integrally formed, the camshaft bearing lid goes up from the Cam bearing pedestal and breaks, the camshaft bearing lid Pass through disconnecting contacting surface cooperation of rising with the Cam bearing pedestal.

Using the disconnected formula structure that rises, camshaft bearing lid is matched with Cam bearing pedestal for the Cam bearing pedestal and the camshaft bearing lid It closes precision height and anti-lateral shear ability is strong, in cylinder head and Cam bearing pedestal integrally casting, Cam bearing pedestal and cylinder head are not It needs carrying out location and installation, improves cooperation precision height, simplified processing and assembly technology, reduced costs.

Preferably, described one kind disconnected formula camshaft mounting structure that rises further includes rocker arm axle bearing, the camshaft bearing lid It is formed with the rocker arm shaft bearing integrated, simplifies the fixed installation of rocker arm axle bearing, simplified processing and assembly technology, reduced Cost.

Preferably, the camshaft bearing lid and the Cam bearing pedestal are bolted, convenient for tearing open for camshaft bearing lid It unloads, structure is simple, at low cost.

Preferably, the disconnecting contacting surface that rises between the Cam bearing pedestal and camshaft bearing lid is conducive to mention in corrugated shape The location and installation precision of high Cam bearing pedestal and camshaft bearing lid, cooperation is more firm, and bonding strength is high.

The disconnected method that rises of Cam bearing pedestal and camshaft bearing lid is as follows, and Cam bearing pedestal and camshaft bearing lid are integrally formed, It is needing the position (rise cross section place) disconnected to etch scar very shallow together with laser, is then being set from inside to outside with machinery It is standby that camshaft bearing lid is given to apply a powerful expansive force, at this time camshaft bearing lid will from the position etched in advance from It is disconnected on Cam bearing pedestal.The benefit for the disconnected structure that rises mainly has: first is that precision is high, the Cam bearing pedestal and camshaft to combine Holding between lid is no any gap, is like one complete whole；Second is that anti-lateral shear ability is strong, due to coarse Cooperate between section it is tight, as long as connection bolt does not loosen, in conjunction with two parts will not transverse shifting, so the disconnected structure that rises It is able to bear load more stronger than plain connecting rod.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of disconnected formula camshaft mounting structure that rises described in the utility model.

Fig. 2 is the assembling structure schematic diagram of Cam bearing pedestal and camshaft bearing lid described in the utility model.

In figure: 1, cylinder head；2, Cam bearing pedestal；3, camshaft bearing lid；4, rocker arm axle bearing.

Specific embodiment

The utility model is described further with reference to the accompanying drawings and detailed description:

As depicted in figs. 1 and 2, which is the structure chart of six cylinder machine cylinder caps, and one kind rises disconnected formula camshaft mounting structure, including Cylinder head 1, Cam bearing pedestal 2 and camshaft bearing lid 3, the Cam bearing pedestal 2 use casting integrated molding with the cylinder head 1 Design, the camshaft bearing lid 3 go up from the Cam bearing pedestal 2 and break, the camshaft bearing lid 3 and the Cam bearing pedestal 2 Pass through disconnecting contacting surface cooperation of rising；

Described one kind disconnected formula camshaft mounting structure that rises further includes rocker arm axle bearing 4, the camshaft bearing lid 3 with it is described Rocker arm axle bearing 4 uses casting integrated molded design, and the rocker arm axle bearing 4 is located at 3 top of camshaft bearing lid, described to shake 4 upper surface of arm axle bearing is plane；

The camshaft bearing lid 3 and the Cam bearing pedestal 2 are bolted, and are provided with spiral shell at the top of Cam bearing pedestal 2 Keyhole, camshaft bearing lid 3 are provided with through-hole, and the camshaft bearing lid 3 and the Cam bearing pedestal 2 is bolted；

The disconnecting contacting surface that rises between the Cam bearing pedestal 2 and camshaft bearing lid 3 is in corrugated shape.

A kind of manufacture processing method of disconnected formula camshaft mounting structure that rises described in the utility model is approximately as described to shake Arm axle bearing 4, the camshaft bearing lid 3, the Cam bearing pedestal 2 and 1 integrally casting shaping of cylinder head, then to cam Bearing cap 3 and the Cam bearing pedestal 2 carry out disconnected processing of rising, and then the camshaft bearing lid 3 and the Cam bearing pedestal 2 pass through The section that rises, which is engaged after being bolted, carries out Boring, processes to 4 upper surface of rocker arm axle bearing and connecting hole.

Claims (4)

1. The disconnected formula camshaft mounting structure 1. one kind rises, including cylinder head (1), Cam bearing pedestal (2) and camshaft bearing lid (3), Be characterized in that: the Cam bearing pedestal (2) and the cylinder head (1) are integrally formed, and the camshaft bearing lid (3) is from the cam Bearing block (2), which goes up, to break, and the camshaft bearing lid (3) and the Cam bearing pedestal (2) pass through the disconnecting contacting surface that rises and cooperate.
2. The disconnected formula camshaft mounting structure 2. one kind as described in claim 1 rises, it is characterised in that: further include rocker arm axle bearing (4), the camshaft bearing lid (3) and the rocker arm axle bearing (4) are integrally formed.
3. The disconnected formula camshaft mounting structure 3. one kind as claimed in claim 1 or 2 rises, it is characterised in that: the camshaft bearing lid (3) it is bolted with the Cam bearing pedestal (2).
4. The disconnected formula camshaft mounting structure 4. one kind as claimed in claim 1 or 2 rises, it is characterised in that: the Cam bearing pedestal (2) the disconnecting contacting surface that rises between the camshaft bearing lid (3) is in corrugated shape.