TW201615966A - Clearance eliminating mechanism of engine crankshaft - Google Patents

Abstract

The present invention relates to a clearance eliminating mechanism of engine crankshaft. The crankcase is configured with a crankshaft penetrating the crankcase. The crankcase has a crankshaft bearing bracket configured with a bearing supporting the crankshaft. The crankcase is configured with a plurality of mounting hole seats. The mounting hole seat has a mounting hole penetrated through and formed on the axial wall surface of the crankshaft bearing bracket and is configured with a clearance eliminating mechanism. The clearance eliminating mechanism comprises: a tension plug received in each mounting hole and capable of sliding, a spring pushing against the tension plug, and a position-limiting plate simultaneously covering the plurality of mounting holes and pressing on the spring. In which, the bearing comprises an outer ring and an inner ring. The crankshaft bearing bracket comprises a surrounding wall portion and a vertical wall portion. The mounting hole has an opening, which is opened at the intersection between the surrounding wall portion and the vertical wall portion of the crankshaft bearing bracket. The tension plug may compress the spring while the position-limiting plate covers the mounting holes and further link the spring for pushing the tension plug against the outer ring of the bearing. Thus, the present invention may eliminate the crankshaft clearance, and prevent the piston from occurring with heavy thrust due to the combustion inside the engine. The heavy thrust on the piston may be passed to the crankshaft by the linking rod which may easily generate clearance among the crankshaft, the bearing and the crankshaft bearing bracket, so as to ensure the engagement of other components linked with the crankshaft and further enhance the overall performance of the engine.

Description

Clearance mechanism for engine crankshaft

The present invention relates to a clearance mechanism for an engine crankshaft, and more particularly to a clearance mechanism for an engine crankshaft that can eliminate engine crankshaft clearance and avoid interference between the clearance cancellation mechanism and other components.

When the vehicle engine is running, there is a gap between the crankshaft and the crankshaft bearing. Therefore, when the engine is running, the crankshaft and the crankshaft bearing may generate an impact sound, and at the same time, due to the existence of the gap, the original crankshaft phase Defects such as poor meshing of other members of the meshing are generated.

As shown in Figs. 1 and 2, the manufacturer has created the bearing structure of the crankshaft of the internal combustion engine No. 93126901. The patent case has a clearance absorbing mechanism 11 mounted on the crankcase 1, and the clearance absorbing mechanism 11 includes There is a spring plate 111, a spring member 112 and a pusher insert 113, thereby solving the gap between the crankshaft and the crankshaft bearing. However, the length of the play absorbing mechanism 11 further causes the absence of other parts behind the play absorbing mechanism 11.

However, how to avoid interference between the gap absorbing mechanism and other parts to improve the use efficiency of the engine has been an urgent problem for the locomotive industry.

The main object of the present invention is to provide a clearance eliminating mechanism for an engine crankshaft, On the one hand, the engine crankshaft clearance can be eliminated, and on the other hand, the gap elimination mechanism of the engine crankshaft can easily interfere with other parts.

The present invention is directed to the above object, and the main technical means adopted is to provide a clearance mechanism for an engine crankshaft, the crankcase of the engine is provided with a crankshaft disposed through the crankcase, the crankcase has a crankshaft bearing, the crankshaft bearing The seat is provided with a bearing for supporting a crankshaft, the crankcase is provided with a plurality of mounting holes, the mounting hole has a mounting hole penetrating and formed on an axial wall surface of the crank bearing housing, the mounting hole seat is provided with a clearance eliminating structure; The gap eliminating mechanism includes: a tension plunger respectively accommodated and slidably in the mounting hole, and a spring pushed against the tension plunger, and a limiting plate capable of covering the plurality of mounting holes and pressing the spring at the same time The bearing includes an outer ring and an inner ring, the crank bearing housing includes a ring wall portion and a vertical wall portion; the mounting hole has an opening portion, and the opening portion is a ring wall portion of the crankshaft bearing seat a junction with the vertical wall portion; the tension plunger compresses the spring when the limiting plate member covers the mounting hole, and then the spring is urged to push the tensioning plunger against the bearing .

The effect that the present invention can achieve by the above technical means is that a plurality of gap eliminating mechanisms are mounted on the crankcase, whereby the pressing portion of the limiting plate member of the gap eliminating mechanism can press the spring, the spring Forming a pressure on the tension plunger, the pressing portion of the tension plunger is exposed outside the opening of the mounting hole to press against the outer ring of the bearing, thereby eliminating the gap of the crankshaft, and simultaneously Avoiding the heavy thrust of the piston due to the internal combustion of the engine, the heavy thrust of the piston is transmitted to the crankshaft through the connecting rod, and a gap is generated between the crankshaft, the bearing and the crankshaft bearing housing, thereby ensuring the crankshaft The degree of meshing of the other components connected to each other can further improve the overall use of the engine.

Another effect of the present invention is that the tension plunger of the gap eliminating mechanism The maximum axial length of the tension plunger is shorter than the maximum radial length of the tension plunger, and the axial length of the spring after compression is shorter than the radial length of the spring, thereby effectively reducing the clearance elimination The overall length of the mechanism; therefore, a space is formed in the crankcase at the rear end of the clearance eliminating mechanism, which is available for the installation of the starting gear set or other parts, thereby further improving the use effect of the engine.

1‧‧‧Crankcase

11‧‧‧Gap absorption mechanism

111‧‧‧Spring plate

112‧‧‧Spring components

113‧‧‧Promoting plugins

2‧‧‧Gap elimination mechanism

21‧‧‧Limited plate

211‧‧‧Depression

2111‧‧‧ inner arc

212‧‧‧Fixed Department

2121‧‧‧Keyhole

2122‧‧‧External arc

22‧‧‧ Spring

23‧‧‧Tensor plunger

231‧‧‧Fist

3‧‧‧ crankcase

3a‧‧‧Right crankcase

3b‧‧‧ lifting ears

3c‧‧‧ reinforcing ribs

31‧‧‧Crankshaft housing

311‧‧‧ Ring Wall Department

312‧‧‧ vertical wall

31a‧‧‧Outside

32‧‧‧ Bearing

321‧‧‧Outer Ring

322‧‧‧Rolling parts

323‧‧‧ Inner Ring

33‧‧‧Installation socket

331‧‧‧Installation boss

34‧‧‧Installation holes

341‧‧‧ openings

35‧‧‧Lock hole

4‧‧‧ crankshaft

41‧‧‧Axis and neck

5‧‧‧Start gear set

L‧‧‧Maximum axial length of the tension plunger

L1‧‧‧ axial length after compression of the spring

D‧‧‧Maximum radial length of tension plunger

D1‧‧‧ radial length of the spring

S‧‧‧ screw elements

P‧‧‧ extension line

Fig. 1 and 2 show "bearing structure of a crankshaft of an internal combustion engine" No. 93126901.

Figure 3 is a schematic exploded view of the gap eliminating mechanism of the engine crankshaft of the present invention.

Figure 4 is a schematic view showing the assembly of the gap eliminating mechanism of the engine crankshaft of the present invention.

Figure 5 is a cross-sectional view of the gap eliminating mechanism of the engine crankshaft of the present invention.

In order to make it easier for the reviewing committee to understand the structure of the present invention and the achievable effects, the following description is provided with reference to the drawings; first, referring to Figures 3 and 5, the gap canceling mechanism of the engine crankshaft of the present invention, the gap is eliminated. The mechanism 2 is mounted on a crankcase 3 of an engine. The crankcase 3 is provided with a crank bearing housing 31. A bearing 32 is mounted in the crank bearing housing 31. The bearing 32 is provided with a crankshaft 4 having a journal. The portion 41 is located outside the bearing 32. The crankshaft 4 is coupled to a piston (not shown) by a connecting rod.

As shown in FIG. 5, the crank bearing housing 31 has a ring wall portion 311 and a vertical wall portion 312. The bearing 32 has an outer ring 321, a rolling member 322 (actually implemented by balls or needles), and an inner ring 323. The rolling member 322 is surrounded by the outer ring 321 and the inner ring The outer ring 321 of the bearing 32 has an outer diameter slightly smaller than the inner diameter of the annular wall portion 311 of the crank bearing housing 31, and the outer end of the outer ring 321 of the bearing 32 abuts against the vertical portion of the crank bearing housing 31. The wall portion 312 is configured to be mounted and seated on the annular wall portion 311 of the crank bearing housing 31. The two end sides of the crankshaft 4 are mounted and seated in the inner ring 323 of the bearing 32. Thereby, the crankshaft 4 is stably mounted in the crankcase 3, and can be freely rotated by the piston by the support of the bearing 32.

As shown in FIG. 3 and FIG. 4, the crankcase 3 has a right crankcase 3a and a left crankcase (not shown in the drawings), and a plurality of mounting holes 33 are arranged outside the right crankcase 3a, and the crankcase 3 corresponds to The crankshaft housing shaft 31 is axially projectingly formed with a mounting boss 331 for mounting the socket 33. The present invention is exemplified by two mounting sockets 33. One end of the mounting hole holder 33 is provided with a mounting hole 34 integrally formed to penetrate the wall surface of the crank bearing housing 31 of the crankcase 3 (right crankcase 3a), and the two mounting holes 34 are located at the center of the crank bearing housing 31. The other end of the mounting hole 34 is provided with a locking hole 35; the mounting hole 33 is provided for the clearance eliminating mechanism 2; the crankcase 3 is further provided with a frame (Fig. The connecting lug 3b is not shown in the drawing; the mounting bosses 331 of the crankcase 3 in the plurality of mounting holes 33 each have a corresponding convex crank bearing 31 extending in a radial direction and provided with reinforcing ribs 3c radially outward. The engine (horizontal engine) can be pivoted on the frame of the Scooter type locomotive (not shown in the drawings) by the lifting lug 3b.

As shown in FIG. 3 and FIG. 5, the mounting hole 34 defines an opening portion 341 on one side of the bottom portion. The opening portion 341 of the mounting hole 34 is formed by the outer side of the crankcase 3 toward the annular wall portion 311 of the crank bearing housing 31 and the vertical wall. The intersection of the portion 312 is disposed, and the mounting hole 34 opens the opening portion 34 adjacent to the intersection of the annular wall portion 311 and the vertical wall portion 312 of the crank bearing housing 31. 1. Specifically, the opening of the opening 341 faces the journal portion 41 of the crankshaft 4.

As shown in FIG. 3 and FIG. 5, the gap eliminating mechanism 2 includes a limiting plate member 21, a spring 22 and a force plunger 23; the limiting plate member 21 has a pressing portion 211 and a fixing portion 212, and the fixing portion 212 The locking plate member 21 has two locking holes 2121. The locking plate member 21 is fastened to the locking hole 35 of the mounting hole 33 of the right crankcase 3a by the screwing member S. The locking hole 2121. Coinciding with the reinforcing rib 3c of the crankcase 3 toward the extension, that is, the reinforcing rib 3c of the crankcase 3 is superposed on the extending line P of the locking hole 2121 and the center of the locking hole 2121. The pressing portion 211 can be pressed The spring 22 has one end that abuts against the pressing portion 211 of the limiting plate member 21, and the other end of the spring 22 extends into the tensioning plunger 23; the tensioning plunger 23 has a pressing portion 231, The pressing portion 231 is a chamfered surface, and the pressing portion 231 is exposed outside the opening portion 341 of the mounting hole 34, whereby the pressing portion 231 can be pressed against the outer ring 321 of the bearing 32.

As shown in FIG. 3 and FIG. 4, the fixing portion 212 of the limiting plate member 21 has an outer arcing portion 2122 protruding toward the crank bearing housing 31. The two locking holes 2121 of the fixing portion 212 are adjacent to the outer arcing portion. At the two ends of the end edge of the 2122, the fixing portion 212 is located radially outward of the crank bearing housing 31 of the crankcase 3; the pressing portion 211 of the limiting plate member 21 has an inner arc concave toward the crank bearing housing 31. 2111, the pressing portion 211 is extended toward the center of the crank bearing housing 31 and located outside the outer end portion 31a of the crank bearing housing 31; wherein the arc length of the inner arc portion 2111 is shorter than the arc shape of the outer arc portion 2122 The length can thereby make the limiting plate member 21 and the crankcase 3 more tightly coupled.

As shown in FIGS. 3 and 5, wherein the maximum axial length L of the tension plunger is shorter than the maximum radial length D of the tension plunger, and the axial length L1 of the spring after compression is It is shorter than the radial length D1 of the spring and is also shorter than the maximum radial length D of the tension plunger, whereby the overall length of the gap eliminating mechanism 2 can be effectively shortened to reduce the installation of the gap eliminating mechanism 2 and Other parts cause interference.

Referring to FIG. 3, FIG. 4 and FIG. 5 together, the gap elimination mechanism of the engine crankshaft of the present invention is implemented. The present invention is equipped with a complex array gap eliminating mechanism 2, and the following embodiments are only described by taking one of the groups as an example; The clearance eliminating mechanism 2 is mounted between the lifting lug 3b and the crank bearing housing 31; the tension plunger 23 and the spring 22 of the clearance eliminating mechanism 2 are sequentially mounted in the crankcase 3 (the right crankcase 3a) The limiting plate member 21 is locked to the locking hole 35 of the mounting hole holder 33 of the right crankcase 3a by the two locking holes 2121 of the fixing portion 212 of the screwing member S. The pressing portion 211 of the member 21 can press the spring 22, and the spring 22 can form a pressure on the tension plunger 23, and the pressing portion 231 of the tension plunger 23 is exposed outside the opening portion 341 of the mounting hole 34, and Compressing against the outer ring 321 of the bearing 32, thereby eliminating the gap of the crankshaft 4, and avoiding the heavy thrust generated on the piston by the internal combustion of the engine, the heavy thrust of the piston being transmitted to the piston through the connecting rod The crankshaft 4 easily creates a gap between the crankshaft 4, the bearing 32, and the crank bearing housing 31. The degree of meshing of other components connected to the crankshaft 4 is ensured, thereby improving the overall use of the engine.

As shown in FIG. 3 and FIG. 5, it is necessary to mention that the maximum axial length L of the tension plunger of the tension plunger 23 of the gap eliminating mechanism 2 is shorter than the maximum radial length D of the tension plunger. And the axial length L1 of the spring after compression is shorter than the radial length D1 of the spring, whereby the overall length of the gap eliminating mechanism 2 can be effectively shortened; therefore, the crankcase 3 at the rear end of the clearance eliminating mechanism 2 There is space inside, which is available for starting gear set 5 or other The installation of parts (such as oil pump transmission mechanism, one-way clutch, generator, etc.) can improve the use of the engine.

The effect of the present invention is that a plurality of gap eliminating mechanisms 2 are mounted on the crankcase 3, whereby the pressing portion 211 of the limiting plate member 21 of the gap eliminating mechanism 2 can press the spring 22, that is, the spring 22 The tension plunger 23 can be pressed, and the pressing portion 231 of the tension plunger 23 is exposed outside the opening portion 341 of the mounting hole 34 to be pressed against the outer ring 321 of the bearing 32, thereby eliminating the The clearance of the crankshaft 4 can prevent the heavy thrust of the piston from being generated by the internal combustion of the engine. The heavy thrust of the piston is transmitted to the crankshaft 4 through the connecting rod, and the crankshaft 4, the bearing 32 and the crank bearing housing 31 are easily made. A gap is formed between them, thereby ensuring the degree of meshing of other components coupled to the crankshaft 4, thereby improving the overall use of the engine.

Another effect of the present invention is that the maximum axial length L of the tension plunger of the tension plunger 23 of the gap eliminating mechanism 2 is shorter than the maximum radial length D of the tension plunger, and after the spring is compressed The axial length L1 is shorter than the radial length D1 of the spring, whereby the length of the entire gap eliminating mechanism 2 can be effectively shortened; therefore, a space is formed in the crankcase 3 at the rear end of the clearance eliminating mechanism 2, The space is available for the installation of the gear set 5 or other components, thereby enhancing the use of the engine.

The gap eliminating mechanism of the engine crankshaft of the present invention can achieve the purpose of appeal by the above-mentioned structure, and should meet the requirements of novelty, advancement and industrial utilization of the invention patent, and apply for an invention patent according to law, pray The detailed examination of your review committee, and the approval of the approval of the invention patent, to the sense of virtue.

2‧‧‧Gap elimination mechanism

21‧‧‧Limited plate

211‧‧‧Depression

2111‧‧‧ inner arc

212‧‧‧Fixed Department

2121‧‧‧Keyhole

2122‧‧‧External arc

22‧‧‧ Spring

23‧‧‧Tensor plunger

231‧‧‧Fist

3‧‧‧ crankcase

3a‧‧‧Right crankcase

3b‧‧‧ lifting ears

3c‧‧‧ reinforcing ribs

31‧‧‧Crankshaft housing

311‧‧‧ Ring Wall Department

312‧‧‧ vertical wall

31a‧‧‧Outside

32‧‧‧ Bearing

321‧‧‧Outer Ring

322‧‧‧Rolling parts

323‧‧‧ Inner Ring

33‧‧‧Installation socket

331‧‧‧Installation boss

34‧‧‧Installation holes

341‧‧‧ openings

35‧‧‧Lock hole

41‧‧‧Axis and neck

L‧‧‧Maximum axial length of the tension plunger

L1‧‧‧ axial length after compression of the spring

D‧‧‧Maximum radial length of tension plunger

D1‧‧‧ radial length of the spring

S‧‧‧ screw elements

P‧‧‧ extension line

Claims (10)

A clearance mechanism for an engine crankshaft, the engine is provided with a crankshaft disposed through a crankcase, the crankcase has a crankshaft bearing housing, and the crankshaft bearing housing is provided with a bearing for supporting a crankshaft, wherein the crankcase is provided with a plurality of mounting holes, the mounting holes having mounting holes formed in the axial wall surface of the crankshaft housing, the mounting holes being provided with a clearance eliminating mechanism; the clearance eliminating mechanism includes: being respectively received by the mounting holes a slideable tension plunger, and a spring that pushes against the tension plunger, and a limit plate member capable of simultaneously covering the plurality of mounting holes and pressing the spring; wherein the bearing includes an outer ring and an inner ring, The crankshaft bearing housing includes a ring wall portion and a vertical wall portion; the mounting hole has an opening portion which is formed at a boundary between the ring wall portion and the vertical wall portion of the crankshaft bearing seat; the tension plunger is When the limiting plate covers the mounting hole, the spring is compressed, and the spring is urged to push the tensioning plunger against the outer ring of the bearing. The gap canceling mechanism of the engine crankshaft according to claim 1, wherein the tension plunger of the plurality of mounting holes has a maximum axial length shorter than the tension plunger Maximum radial length. The gap canceling mechanism of the engine crankshaft according to claim 1, wherein the plurality of springs that are received in the mounting hole and pressed by the limiting plate member to push against the tension plunger, the spring is compressed The axial length is shorter than the maximum radial length of the tension plunger. The gap canceling mechanism of the engine crankshaft according to claim 1 or 3, wherein the plurality of bullets accommodated in the mounting hole are pressed by the limiting plate member to push the tension plunger The spring, the axial length of the spring after compression is shorter than the radial length of its spring. The gap canceling mechanism of the engine crankshaft according to the first aspect of the invention, wherein the tension plunger that is pressed against the outer ring of the bearing is a beveled surface as a pressing portion; and the limiting plate member is flat. The gap canceling mechanism of the engine crankshaft according to claim 1 or 5, wherein the limiting plate member has a fixing portion and a pressing portion, and the fixing portion is located radially outward of the crank bearing housing of the crankcase; The pressing portion extends to the outside of the outer end portion of the crankshaft bearing housing of the crankcase toward the center of the crankshaft, and covers the spring to push the tensioning plunger against the outer ring of the bearing; the fixing portion has a pressing portion facing the crankshaft bearing housing; the pressing portion has a concave inner portion facing the crank bearing housing; the fixing portion of the limiting plate member has two locking holes, and the locking holes are adjacent to each other Both ends of the arc end of the arc; the arc length of the inner arc of the recess is shorter than the arc length of the arc portion outside the protrusion. The clearance mechanism of the engine crankshaft according to the first aspect of the invention, wherein the crankcase is formed by a plurality of mounting bosses of the plurality of mounting holes, corresponding to the axial projection of the crankshaft bearing housing, wherein the crankcase is Each of the plurality of mounting bosses has a reinforcing rib disposed radially outwardly, and the limiting plate member has a fixing portion, and the mounting boss is provided with a locking hole corresponding to the fixing portion, and the locking hole is overlapped and reinforced The extension of the ribs. The clearance mechanism of the engine crankshaft of claim 1, wherein the plurality of mounting holes are located within an angle of 120 degrees from the center of the crankshaft housing. The clearance mechanism of the engine crankshaft of claim 1, wherein at least a starting gear set or an oil pump transmission mechanism or a one-way clutch or a generator is provided in addition to the limiting plate member of the clearance eliminating mechanism. The clearance mechanism for an engine crankshaft according to claim 1, wherein the crankcase is further provided with a lifting lug for connecting to the frame, the clearance eliminating mechanism is located between the crank bearing housing and the lifting lug .