CN215256474U

CN215256474U - Engine barring gear

Info

Publication number: CN215256474U
Application number: CN202120574162.1U
Authority: CN
Inventors: 马宝光; 李祥宇; 徐志远; 王浩
Original assignee: Weichai Heavy Machinery Co Ltd
Current assignee: Weichai Heavy Machinery Co Ltd
Priority date: 2021-03-20
Filing date: 2021-03-20
Publication date: 2021-12-21
Anticipated expiration: 2031-03-20

Abstract

The utility model discloses an engine barring device, the fixed barring axle right side that is provided with the barring gear is provided with spacing boss, from left to right, overlaps in proper order on the barring axle and is equipped with barring gear, bearing frame and elastic expansion sleeve. The elastic telescopic sleeve comprises a fixed shaft sleeve, a movable shaft sleeve and a return spring, the return spring is sleeved on the disc axle and is positioned in a cavity formed by sleeving the fixed shaft sleeve and the movable shaft sleeve, and the movable shaft sleeve is limited through a limiting boss. An annular groove is formed between the inner wall and the outer wall of the fixed shaft sleeve, one end of the return spring is abutted against the groove bottom of the annular groove, and the other end of the return spring is abutted against the movable shaft sleeve; the engine barring device further comprises a guide block fixedly connected to the bearing seat, and a non-return structure for preventing the barring gear from being disengaged from the flywheel gear ring is arranged between the movable shaft sleeve and the guide block. When the barring is carried out, the barring gear can be meshed with the starting gear ring without applying external force, and the personal safety of operators can be ensured.

Description

Engine barring gear

Technical Field

The utility model relates to an engine detects, maintenance of equipment technical field, especially relates to an engine barring gear.

Background

The engine is often required to be turned during the assembling and maintenance processes, and the small engine is generally turned in a manner that a rod prizes a flywheel circumferential surface to drill a hole. However, for large diesel engines, the torque to be overcome by turning gear is large and limited by the cabin space, which is difficult to adopt.

In the prior art, barring is often performed by means of a barring mechanism mounted near the flywheel. In order to prevent a gear on the barring mechanism from forgetting to disengage and causing the high-speed rotation of a gear ring reverse towing barring mechanism after an engine starter is started to damage the barring mechanism, the existing barring mechanism usually adopts a normally disengaged structure, namely the barring mechanism and the gear ring are disengaged in a default state. When carrying out the barring, need external force to continuously overcome the spring force in the barring mechanism, the barring mechanism just can not deviate from, and this has increased the barring degree of difficulty, arouses personnel's injury moreover easily.

Disclosure of Invention

In order to overcome the defects, the utility model provides an engine barring gear can guarantee the barring gear and start the ring gear full meshing when carrying out the barring to the engine to can guarantee operating personnel's personal safety.

In order to solve the technical problem, the utility model discloses an engine barring device, engine barring device includes: the turning gear is fixedly arranged on the turning shaft, the elastic telescopic sleeve comprises a fixed shaft sleeve, a movable shaft sleeve and a return spring, the return spring is sleeved on the turning shaft and is positioned in a cavity formed by the fixed shaft sleeve and the movable shaft sleeve, and the movable shaft sleeve is limited through the limiting boss; the fixed shaft sleeve comprises an inner wall and an outer wall, an annular groove is formed between the inner wall and the outer wall, one end of the return spring abuts against the groove bottom of the annular groove, and the other end of the return spring abuts against the movable shaft sleeve; the engine barring gear further comprises a guide block fixedly connected to the bearing seat, and a non-return structure for preventing the barring gear from being disengaged from the flywheel gear ring is arranged between the movable shaft sleeve and the guide block.

Furthermore, the non return structure include the slip needle with set up in guide way on the guide block, the link of slip needle rotate connect in on the loose axle sleeve, the free end of slip needle retrain in the guide way, the guide way is imitative heart-shaped structure. The turning mechanism is characterized in that A, B, C, D four inflection points are sequentially arranged on the guide groove, when the engine turning device is in a free state, the free end of the sliding needle is located at an inflection point A of the guide groove, and when the engine turning device is in a turning state, the free end of the sliding needle is located at an inflection point C of the guide groove, and the inflection point C is called a locking point.

Further, three sections a, B and C are sequentially communicated between the inflection point A and the inflection point B, the depth of the section a groove is H2, the depth of the section B groove is reduced to H1 from H2, the depth of the section C groove is H1, three sections D, e and f are sequentially communicated between the inflection point B and the inflection point C, the section D is communicated with the section C, the depth of the section D groove is H2, the depth of the section e groove is reduced to H1 from H2, the depth of the section f groove is H1, three sections g, H and i are sequentially communicated between the inflection point C and the inflection point A, the section g is communicated with the section f, the section i is communicated with the section a, the inflection point D is located in the section g, the depth of the section g groove is H2, the depth of the section H is reduced to H1 from H2, and the depth of the section i groove is H1.

Furthermore, the bottom of the outer wall is provided with a sliding needle avoiding hole.

Furthermore, the disc axle is provided with a sleeve connecting part on the right side of the limit boss, and the cross section of the sleeve connecting part is hexagonal.

Furthermore, a limiting part protruding towards the disc axle is arranged at the right end part of the inner wall; the turning shaft guide through hole is formed in the right end of the turning shaft and extends to the turning shaft groove; a plug is arranged at the right end of the disc axle guide through hole, a positioning spring and a sliding block are arranged in the disc axle guide through hole, one end of the positioning spring abuts against the plug, the other end of the positioning spring abuts against the sliding block, and the length of the sliding block is greater than that of the disc axle guide through hole; the sleeve mounting part is provided with a sleeve mounting part through hole, a ball is arranged in the sleeve mounting part through hole, a slider groove is arranged on the slider, when the positioning spring is in a free state, the slider groove is aligned with the sleeve mounting part through hole, and when the disk is driven, the moving stroke of the slider is smaller than that of the disk axle.

Furthermore, the turning shaft guide through hole is a rectangular turning shaft guide through hole.

Further, the diameter of the sleeve mounting part through hole is smaller than the outer diameter of the ball.

Further, an end cover is arranged at the left end of the turning gear, and the end cover abuts against the turning gear.

Further, the turning gear is fixedly connected with the turning axle through a C-shaped key.

After the technical scheme is adopted, the beneficial effects of the utility model are that, the fixed barring axle right side that is provided with the barring gear is provided with spacing boss, from left to right, overlaps in proper order on the barring axle and is equipped with barring gear, bearing frame and elastic expansion cover. The elastic telescopic sleeve comprises a fixed shaft sleeve, a movable shaft sleeve and a return spring, the return spring is sleeved on the disc axle and is positioned in a cavity formed by sleeving the fixed shaft sleeve and the movable shaft sleeve, and the movable shaft sleeve is limited through a limiting boss. An annular groove is formed between the inner wall and the outer wall of the fixed shaft sleeve, one end of the return spring is abutted against the groove bottom of the annular groove, and the other end of the return spring is abutted against the movable shaft sleeve; the engine barring device further comprises a guide block fixedly connected to the bearing seat, and a non-return structure for preventing the barring gear from being disengaged from the flywheel gear ring is arranged between the movable shaft sleeve and the guide block. When the engine is turned, the effective meshing of the turning gear and the starting gear ring can be ensured without applying external force, the safety of the turning device is ensured, and the personal safety of operators can be ensured.

Drawings

Fig. 1 is a schematic structural diagram of an engine barring gear of the present invention;

fig. 2 is a schematic structural diagram of a turning state of the engine turning gear of the present invention;

FIG. 3 is an enlarged cross-sectional view taken at E-E of FIG. 1;

FIG. 4 is an enlarged schematic view of the structure of FIG. 3 at F;

FIG. 5 is a schematic view of the structure of FIG. 4 showing the depth of the guide groove at each position;

FIG. 6 is an enlarged perspective view of the disc axle of FIG. 1;

in the figure: 1-positioning spring, 2-ball, 3-slide, 31-slide groove, 4-movable guide sleeve, 5-return spring, 6-fixed guide sleeve, 61-outer wall, 611-slide pin avoiding hole, 62-inner wall, 621-limiting part, 7-turning shaft, 71-turning shaft guiding through hole, 72-limiting boss, 73-turning shaft groove, 74-sleeve mounting part, 741-sleeve mounting part through hole, 75-key groove, 8-slide pin, 9-guiding block, 91-guiding groove, 10-flange, 11-screw, 12-bearing seat, 13-rolling bearing, 14-turning gear, 15-C type key, 16-end cap, 17-bolt, 18-sleeve, 19-flywheel gear ring, 20-plug.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

Referring to fig. 1, 3, 4 and 6, the engine barring device comprises a barring shaft 7, wherein the barring shaft 7 is provided with a left end and a right end, a limiting boss 72 is arranged on the right side of the barring shaft 7, and a barring gear 14, a bearing seat 12 and an elastic telescopic sleeve are sequentially sleeved on the barring shaft 7 along the axis of the barring shaft from left to right. A rolling bearing 13 is provided between the bearing housing 12 and the disc axle 7, and smooth rotation of the disc axle 7 can be ensured. The bearing block 12 is fixedly connected to the flange 10 by means of screws 11. The engine barring gear is fixedly connected to an engine body (not shown in the figure) through a flange 10. When the turning operation is not performed, the turning gear 14 is not meshed with the flywheel ring gear 19.

The barring gear 14 is fixedly arranged on the barring shaft 7. The barring gear 14 is preferably fixedly connected to the barring axle 7 through a key connection, a key groove 75 is formed in the barring axle 7, the barring gear 14 is fixedly connected with the barring axle through a C-shaped key 15, the C-shaped key 15 is fixedly arranged in the key groove 75, in order to enable the barring gear 14 to be more stably connected with the barring axle 7, the barring gear 14 is pressed tightly at the left end of the barring axle 7 through the end cover 16, and the end cover 16 is fixed together with the barring axle 7 through the bolt 17. Alternatively, the turning gear 14 is provided integrally with the turning shaft 7.

The elastic telescopic sleeve comprises a fixed shaft sleeve 6, a movable shaft sleeve 4 and a return spring 5, the return spring 5 is sleeved on the plate axle 7 and is positioned in an inner cavity formed by the fixed shaft sleeve 6 and the movable shaft sleeve 4 in a sleeved mode, and the movable shaft sleeve 4 is limited through a limiting boss 72.

The fixed shaft sleeve 6 comprises an inner wall 62 and an outer wall 61, an annular groove is formed between the inner wall 62 and the outer wall 61, one end of the return spring 5 abuts against the bottom of the annular groove, and the other end of the return spring 5 abuts against the side wall of the movable shaft sleeve 4; the right end of the inner wall 62 is provided with a stopper 621 projecting toward the disk axle 7.

As shown together with fig. 1, fig. 2, fig. 4, and fig. 5, the engine barring apparatus further includes a guide block 9 fixedly connected to the bearing housing 12, and the guide block 9 is in interference fit with a hole on the bearing housing 12. A non-return structure for preventing the turning gear 14 from being disengaged from the flywheel gear ring 19 is arranged between the movable shaft sleeve 4 and the guide block 9.

The non-return structure comprises a sliding needle 8 and a guide groove 91 arranged on the guide block 9, the connecting end of the sliding needle 8 is rotatably connected on the movable shaft sleeve 4, the free end of the sliding needle 8 is restrained in the guide groove 91, and the guide groove 91 is of an imitated heart-shaped structure. In order to prevent the sliding needle 8 from interfering with the outer wall 61 of the fixed shaft sleeve 6 during the movement process, a sliding needle avoiding hole 611 is formed at the bottom of the outer wall 61 of the fixed shaft sleeve 6.

The guide groove 91 is sequentially provided with A, B, C, D four inflection points, when the engine barring gear is in a free state, the free end of the sliding needle 8 is located at an inflection point A of the guide groove 91, and when the engine barring gear is in a barring state, the free end of the sliding needle 8 is located at an inflection point C of the guide groove 91, and the inflection point C is called a locking point.

The depth of the a-section groove is H2, the depth of the B-section groove is reduced to H1 from H2, the depth of the C-section groove is H1, the depth of the inflection point B and the inflection point C are sequentially communicated with the D-section groove, the e-section groove is H2, the depth of the e-section groove is reduced to H1 from H2, the depth of the f-section groove is H1, the depth of the inflection point C and the inflection point A are sequentially communicated with the g-section groove, the H-section groove and the i-section groove, the g-section groove is communicated with the f-section groove, the i-section groove is communicated with the a-section groove, the inflection point D is located in the g-section groove, the depth of the g-section groove is H2, the depth of the H-section groove is reduced to H1 from H2, and the depth of the i-section groove is H1.

The sleeve connecting portion 74 is provided on the barring shaft 7 on the right side of the limit boss 72, the cross section of the sleeve connecting portion 74 is hexagonal, and the sleeve 18 is caught on the sleeve connecting portion 74 when the engine is barring.

The barring shaft guide through hole 71 is arranged at the right end of the barring shaft 7, and the barring shaft guide through hole 71 extends to the barring shaft groove 73. The barring axle guide through hole 71 is a rectangular barring axle guide through hole. The right end of the turning gear shaft guide through hole 71 is provided with a plug 20, the turning gear shaft guide through hole 71 is internally provided with a positioning spring 1 and a sliding block 3, one end of the positioning spring 1 abuts against the plug 20, the other end of the positioning spring 1 abuts against the sliding block 3, and the length of the sliding block 3 is larger than that of the turning gear shaft guide through hole 71. The disk axle guide through hole 71 is clearance fitted with the slider 3, and the slider 3 can freely slide in the disk axle guide through hole 71.

In order to facilitate the installation of the slider 3, the slider 3 is inserted into the pivot guide through hole 71, the positioning spring 1 is installed after the slider 3 is inserted into the pivot guide through hole 71, and then the plug 20 is fitted to the right end of the pivot guide through hole 71.

The sleeve mounting portion 74 is provided with a sleeve mounting portion through hole 741, the ball 2 is provided in the sleeve mounting portion through hole 741, and the diameter of the sleeve mounting portion through hole 741 is smaller than the outer diameter of the ball 2. The slider 3 is provided with a slider groove 31 for mounting the ball 2, and when the positioning spring 1 is in a free state, the slider groove 31 is aligned with the sleeve mounting part through hole 741, and when the engine is turned, the stroke of movement of the slider 3 is smaller than that of movement of the disc axle 7.

The following detailed description of the working process of turning the engine by using the engine turning gear of the utility model is as follows:

referring to fig. 1, in the non-turning state, the detent spring 1 is in a free state, the slider groove 31 is aligned with the sleeve mount through hole 741, and the ball 2 is located in the slider groove 31 and does not protrude from the mating surface of the sleeve mount 74 and the sleeve 18 of the disk axle 7. The sleeve 18 can be smoothly inserted into the sleeve mounting portion 74 of the dial shaft 7.

As shown in fig. 2, pressing the sleeve 18 moves the disk axle 7 to the left, i.e., moves the disk axle 7 to the flywheel ring gear side. In the moving process of the disc axle 7, the movable shaft sleeve 4 is driven to move by the limiting lug boss 72 on the disc axle 7, and the movable shaft sleeve 4 compresses the return spring 5 in the moving process. The dish axletree 7 passes through ball 2 and drives slider 3 forward motion, and after moving certain distance, slider 3 is spacing by spacing portion 621 on the inner wall 62 of fixed axle sleeve 6, and slider 3 overcomes positioning spring 1's elasticity, takes place relative movement with the dish axletree 7, and ball 2 is shifted out slider recess 31, and ball 2 protrusion dish axletree 7's sleeve installation department 74 and the fitting surface of sleeve 18, embedding sleeve 18's ball socket in, sleeve 18 can't withdraw from.

As shown in fig. 2, 3, 4 and 5, the connecting end of the sliding pin 8 is inserted into the movable sleeve 4, and moves together with the movable sleeve 4 in the direction of the flywheel ring gear 19, and the free end of the sliding pin 8 moves in the guide groove 91 in the guide block 9. Because the groove depth of each position is different, the side wall between the inflection point A and the inflection point B plays a guiding role, the free end of the sliding needle 8 moves from the inflection point A to the inflection point B, and the free end of the sliding needle 8 falls into the stepped groove between the inflection point B and the inflection point C after rising for a certain distance. After the external force for pressing the sleeve 18 is removed, the free end of the sliding needle 8 moves from the inflection point B to the inflection point C along the guide groove 9 under the guide action of the side wall of the guide groove 9 and is clamped in the groove of the inflection point C. At this time, the tension of the slide needle 8 can cancel the pressure of the return spring 5. The barring device realizes automatic non-return, and the barring gear 14 is matched with the flywheel gear ring 19 to normally barring the engine.

After the barring process is finished, the ball 2 protrudes out of the matching surface of the sleeve mounting part 74 of the barring shaft 7 and the sleeve 18 and is embedded into the ball socket of the sleeve 18, so that the sleeve 18 cannot be withdrawn, and the accident that the barring device forgets to return after the barring operation is finished is effectively avoided. When the sleeve 18 is pressed again, the external force overcomes the pressure of the return spring 5, the disc axle 7 continues to move to the left, and the free end of the slide needle 8 moves along the guide groove 9 from the inflection point C to the inflection point D. After the external force is removed, the barring shaft 7 resets under the action of the return spring 5, and the automatic end of the sliding needle 8 moves from the inflection point D to the inflection point A to reset. During the process of outwards withdrawing the sleeve 18, the movement of the sliding block 3 is not limited any more, the ball 2 returns to the sliding block groove 31 of the sliding block 3, and the sleeve 18 is withdrawn normally.

The technical features (such as a segment a, a segment B, a segment C, a segment D, a segment C, a segment e, a segment f, a segment g, a segment f, a segment i, an inflection point a, an inflection point B, an inflection point C, an inflection point D, etc.) referred to in this specification are only for distinguishing the technical features, and do not represent the positional relationship, the installation order, the working order, etc. among the technical features.

In the description of the present specification, it is to be understood that the terms "left side", "right side", "left end", "right end", "inner wall", "outer wall", "left to right", "outer surface", and the like, are used in the orientations and positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative work from the above conception, which falls within the protection scope of the present invention.

Claims

1. An engine barring apparatus, comprising:

the turning gear is fixedly arranged on the turning shaft, the elastic telescopic sleeve comprises a fixed shaft sleeve, a movable shaft sleeve and a return spring, the return spring is sleeved on the turning shaft and is positioned in a cavity formed by the fixed shaft sleeve and the movable shaft sleeve, and the movable shaft sleeve is limited through the limit boss; it is characterized in that the preparation method is characterized in that,

the fixed shaft sleeve comprises an inner wall and an outer wall, an annular groove is formed between the inner wall and the outer wall, one end of the return spring abuts against the groove bottom of the annular groove, and the other end of the return spring abuts against the movable shaft sleeve;

the engine barring gear further comprises a guide block fixedly connected to the bearing seat, and a non-return structure for preventing the barring gear from being disengaged from the flywheel gear ring is arranged between the movable shaft sleeve and the guide block.

2. The engine barring device according to claim 1, wherein the non-return structure comprises a sliding needle and a guide groove arranged on the guide block, a connecting end of the sliding needle is rotatably connected to the movable shaft sleeve, a free end of the sliding needle is constrained in the guide groove, and the guide groove is of a heart-imitating structure; the turning mechanism is characterized in that A, B, C, D four inflection points are sequentially arranged on the guide groove, when the engine turning device is in a free state, the free end of the sliding needle is located at an inflection point A of the guide groove, and when the engine turning device is in a turning state, the free end of the sliding needle is located at an inflection point C of the guide groove, and the inflection point C is called a locking point.

3. The engine barring device according to claim 2, wherein three sections a, B and c are sequentially communicated between the inflection point A and the inflection point B, the depth of the a-section groove is H2, the depth of the b-section groove is reduced from H2 to H1, the depth of the c-section groove is H1, three sections d, e and f are sequentially communicated between the inflection point B and the inflection point C, the section d is communicated with the section C, the depth of the d-section groove is H2, the depth of the e-section groove is reduced from H2 to H1, the depth of the f-section groove is H1, three sections g, h and i are sequentially communicated between the inflection point C and the inflection point A, the section g is communicated with the section f, the i section is communicated with the a section, the inflection point D is positioned in the g section, the depth of the g section groove is H2, the depth of the H section groove is reduced from H2 to H1, and the depth of the i section groove is H1.

4. The engine barring device according to claim 2, wherein a sliding needle avoiding hole is formed in a bottom of the outer wall.

5. The engine barring gear according to claim 1, wherein a sleeve mounting portion is provided on the barring axle on the right side of the limit boss, and a cross section of the sleeve mounting portion is hexagonal.

6. The engine barring device according to claim 5, wherein a right end portion of the inner wall is provided with a stopper portion protruding toward the barring shaft; the turning shaft guide through hole is formed in the right end of the turning shaft and extends to the turning shaft groove; a plug is arranged at the right end of the disc axle guide through hole, a positioning spring and a sliding block are arranged in the disc axle guide through hole, one end of the positioning spring abuts against the plug, the other end of the positioning spring abuts against the sliding block, and the length of the sliding block is greater than that of the disc axle guide through hole; the sleeve mounting part is provided with a sleeve mounting part through hole, a ball is arranged in the sleeve mounting part through hole, a slider groove is arranged on the slider, when the positioning spring is in a free state, the slider groove is aligned with the sleeve mounting part through hole, and when the disk is driven, the moving stroke of the slider is smaller than that of the disk axle.

7. The engine barring device of claim 6, wherein the barring axle guide through hole is a rectangular barring axle guide through hole.

8. The engine barring device of claim 6, wherein a diameter of the sleeve mounting portion through hole is smaller than an outer diameter of the ball.

9. The engine barring device according to claim 1 wherein a left end of the barring gear is provided with an end cap, the end cap abutting against the barring gear.

10. The engine barring device of claim 1, wherein the barring gear is fixedly connected to the barring axle by a C-key.