CN106870714B - Double overhead camshaft diesel engine tooth clearance adjusting tool and method - Google Patents
Double overhead camshaft diesel engine tooth clearance adjusting tool and method Download PDFInfo
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- CN106870714B CN106870714B CN201710109067.2A CN201710109067A CN106870714B CN 106870714 B CN106870714 B CN 106870714B CN 201710109067 A CN201710109067 A CN 201710109067A CN 106870714 B CN106870714 B CN 106870714B
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- 238000009434 installation Methods 0.000 claims description 28
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 230000033001 locomotion Effects 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000002697 Tooth Abrasion Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/12—Arrangements for adjusting or for taking-up backlash not provided for elsewhere
- F16H2057/125—Adjustment of backlash during mounting or assembly of gearing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The utility model provides a two overhead camshaft diesel engine gear clearance adjustment tools, includes support arm, left support arm, right support arm, and the one end of support arm is provided with the location boss of No. one, and the other end of support arm is connected with the articulated dish, is provided with No. two location bosses on the articulated dish, and the one end of left support arm, right support arm all articulates with the articulated dish mutually, and the other end of left support arm, right support arm all is provided with the locating piece, and the bottom of locating piece is provided with the locating hole; during backlash adjustment, the second positioning boss is inserted into a hub hole of the camshaft idler gear, the first positioning boss is inserted into a hub eccentric hole of the first intermediate gear, the positioning holes are nested and fixed on a camshaft for installing two camshaft gears, then the camshaft idler gear is fixed, one end of the first intermediate gear, which is close to the second positioning boss, is rotated, and the first intermediate gear is fixed when the gear backlash meets the requirement. The design can be used for adjusting a plurality of gear clearances of the double overhead camshaft diesel engine at one time, and has the advantages of simple structure and simple and convenient operation.
Description
Technical Field
The invention relates to a gear clearance adjusting tool, in particular to a double overhead camshaft diesel engine gear clearance adjusting tool and a method, which are mainly applicable to one-time adjustment of a plurality of gear clearances of a double overhead camshaft diesel engine.
Background
The valve actuating mechanism of the high-power diesel engine in mass production mostly adopts a single overhead camshaft for driving, the application of double overhead camshafts is less, and no systematic and convenient adjustment mode exists for adjusting the gear-driven double overhead camshaft diesel engine gear side gap. In the prior art, the regulation mode of the gear side clearance of the double overhead cam shaft gear train mainly comprises the following two modes: 1. the gear mounting position is limited by a cylindrical positioning boss of the hub, the plane freedom degree of the gear is completely limited, and the gear clearance is ensured by mounting and processing; 2. a1-shaped groove is formed in the machine body, the left and right movement of the hub is limited, the up and down movement and positioning are allowed, and the tooth gap is ensured. The main drawbacks of these two backlash adjustment modes are: 1. the application of the limiting boss ensures that the position of the gear is completely fixed, the adjustability is not realized, the backlash is ensured by installation and processing, the general difficulty is high, the processing precision of the mass-produced gear meets the requirements, the consistency is poor, the processing errors and the installation errors of the relevant parts such as a cylinder body, a cylinder cover and the like cause uneven distribution of the backlash between the idle gear of the cam shaft and the two cam shaft gears, the dynamic stress of the gear teeth of the idle gear is deteriorated, and the reliability cannot be ensured; 2. the 1-shaped groove realizes the adjustability of the gear side clearance in the initial installation and the gear tooth abrasion to a certain extent, but the unidirectional adjustment cannot solve the position offset of the two cam shaft gears caused by the installation errors and the machining errors of the parts such as the cylinder body, the cylinder cover and the like.
Chinese patent, application publication No. CN104235313a, application publication No. 2014, 12, 24, discloses a backlash adjustment method and gear mechanism, in which an idler gear is pressed to a meshing position with respect to a first gear and a second gear via a film, and then the film is drawn out, so that a proper backlash corresponding to the thickness of the film is formed between the first gear, the second gear, and the idler gear. Although this invention can reduce the cost of backlash adjustment, it still has the following drawbacks: the invention can simultaneously adjust the number of gears with tooth gaps to three, and other two gears except the middle gear are fixed, otherwise, only one-to-one adjustment can be performed, meanwhile, the tooth gaps are determined by adopting the film, the movable gear can move in the installation plane and meet the gear with the blocked position, the adjustment is limited, and the design can not adjust more gear gaps at one time and has complex operation.
Disclosure of Invention
The invention aims to overcome the defects and problems that a plurality of gear clearances cannot be adjusted at one time and the operation is complicated in the prior art, and provides a gear clearance adjusting tool and a gear clearance adjusting method for a double-overhead camshaft diesel engine, which can be used for adjusting a plurality of gear clearances of the double-overhead camshaft diesel engine at one time and are simple in structure and convenient to operate.
In order to achieve the above object, the technical solution of the present invention is: this gear clearance adjustment tool of two overhead camshaft diesel engine gear clearance includes support arm, left support arm, right support arm, the one end of support arm is provided with rather than mutually perpendicular's a location boss, and the other end of support arm is connected with the articulated dish, is provided with rather than mutually perpendicular's No. two location bosses on the articulated dish, the one end of left support arm, right support arm all articulates with the articulated dish mutually, the other end of left support arm, right support arm all is provided with the locating piece, locating piece and left support arm, right support arm are mutually perpendicular, and the bottom of locating piece is provided with the locating hole.
The support arm includes bracing piece, a support column, no. two support columns, no. one the one end of support column is connected with a location boss, and the other end of a support column is connected with the one end of bracing piece perpendicularly, and the other end of bracing piece is connected with the hinge dish, and the hinge dish is connected with the one end of No. two support columns perpendicularly, and the other end of No. two support columns is connected with the locating plate perpendicularly, and the locating plate is connected with No. two location bosses perpendicularly.
The hinge plate is of a cylindrical structure, the outer peripheral surface of the hinge plate is connected with the supporting rod, a groove is formed in the outer peripheral surface of the hinge plate, located far away from the position, where the hinge plate is connected with the supporting rod, of the hinge plate, a hinge hole is formed in the end face of the hinge plate, and the left support arm and the right support arm are hinged to the hinge plate through the hinge hole after being inserted into the groove.
The left support arm and the right support arm comprise support arm rods and support arm columns, the positioning blocks comprise a first positioning block and a second positioning block which are connected, one end of each support arm rod is provided with a mounting hole, the mounting holes are hinged with the hinging holes through hinging pieces after the end of each support arm rod is inserted into the corresponding groove, the other ends of the support arm rods are vertically connected with one ends of the support arm columns, the other ends of the support arm columns are vertically connected with one end face of the corresponding first positioning block, and the positioning holes are formed in the other end face of the corresponding first positioning block.
The bottom of No. two locating pieces is provided with No. three location bosss, is provided with eccentric anchor clamps on the No. three location bosss, eccentric anchor clamps include bottom plate and hyoid, be provided with boss and support on the bottom plate, the bolt hole has been seted up on the boss, the cover is equipped with eccentric rod on the support, the one end of hyoid is provided with baffle, and the other end of hyoid is provided with No. two baffles, and No. two baffles contact with eccentric rod's eccentric cam, the position that is close to No. one baffle on the hyoid is provided with positioning groove, no. three location boss are connected with the bolt hole after passing positioning groove.
The utility model provides a two overhead camshaft diesel engine gear gap adjustment method, two overhead camshaft diesel engine include a camshaft gear, no. two camshaft gears, no. one intermediate gear, no. two intermediate gears and with No. one camshaft gear, no. two camshaft gear homoenergetic's camshaft idler gear, no. two intermediate gears install and lie in the position that keeps away from No. one camshaft gear, no. two camshaft gears on one side of the camshaft idler gear, install No. one intermediate gear between camshaft idler gear and the No. two intermediate gears, no. one intermediate gear and camshaft idler gear, no. two intermediate gears homoenergetic mesh, utilize the gear gap adjustment instrument of above-mentioned to carry out the gear gap adjustment, the gear gap adjustment method includes the following steps:
firstly, a first camshaft gear and a second camshaft gear are respectively installed and fixed on a camshaft of a double overhead camshaft diesel engine, then a camshaft idler gear, a first intermediate gear and a second intermediate gear are placed at preset installation positions, the second intermediate gear is fixed through installation bolts, then a second positioning boss is respectively inserted into a hub hole of the camshaft idler gear and a first positioning boss is inserted into a hub eccentric hole of the first intermediate gear, at the moment, the camshaft idler gear freely moves in an installation plane, then a positioning hole of a left support arm is respectively nested and fixed on the camshaft provided with the first camshaft gear, a positioning hole of a right support arm is nested and fixed on the camshaft provided with the second camshaft gear, at the moment, the position of the camshaft idler gear is fixed, then an installation bolt of the camshaft idler gear is screwed, then one end of the first intermediate gear, which is close to the second positioning boss, is screwed when gaps between the first intermediate gear and the camshaft idler gear and the second intermediate gear meet installation requirements, at the moment, the backlash adjusting method is finished.
The bottom of the positioning block is also provided with a third positioning boss, the third positioning boss is provided with an eccentric clamp, the eccentric clamp comprises a bottom plate and a tongue plate, the bottom plate is provided with a boss and a support, the boss is provided with a bolt hole, the support is sleeved with an eccentric rod, one end of the tongue plate is provided with a first baffle, the other end of the tongue plate is provided with a second baffle, the second baffle is contacted with an eccentric cam of the eccentric rod, the tongue plate is provided with a positioning groove at a position close to the first baffle, and the third positioning boss penetrates through the positioning groove and is connected with the bolt hole;
the method for nesting and fixing the positioning holes of the left support arm on the cam shaft provided with the first cam shaft gear and the positioning holes of the right support arm on the cam shaft provided with the second cam shaft gear is as follows: the locating holes of the left support arm are nested on the cam shaft provided with the first cam shaft gear, the locating holes of the right support arm are nested on the cam shaft provided with the second cam shaft gear, and then the eccentric rod is rotated clockwise, at the moment, the eccentric cam of the eccentric rod moves towards the locating holes so as to push the tongue plate to move towards the locating holes to clamp the cam shaft.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to a gear gap adjusting tool and a gear gap adjusting method for a double-overhead camshaft diesel engine, wherein the gear gap adjusting tool comprises a supporting arm, a left supporting arm and a right supporting arm, wherein the left supporting arm and the right supporting arm are hinged with the supporting arm through hinged discs, when the gear gap adjusting tool is used for adjusting the gear gap of the double-overhead camshaft diesel engine, a first camshaft gear and a second camshaft gear are firstly installed, then a camshaft idler gear, a first intermediate gear and a second intermediate gear are arranged at preset installation positions, the second intermediate gear is fixed, then the gaps between the camshaft idler gear and the first camshaft gear and the second camshaft gear are sequentially adjusted through the gear gap adjusting tool, and the gaps between the first intermediate gear and the camshaft idler gear and the second intermediate gear are respectively adjusted. Therefore, the invention not only can adjust a plurality of gear clearances of the double overhead camshaft diesel engine at one time, but also has simple structure and convenient operation.
2. According to the double-overhead camshaft diesel engine gear gap adjusting tool and method, the grooves are formed in the peripheral surface of the hinging disc, the hinging holes are formed in the end face of the hinging disc, the mounting holes are formed in one ends of the left support arm and the right support arm, and the mounting holes are hinged with the hinging holes through the hinging piece after the ends are inserted into the grooves, so that the double-overhead camshaft diesel engine gear gap adjusting tool is simple to install, and multiple types of double-overhead camshaft diesel engine gear gaps can be adjusted through the gear gap adjusting tool. Therefore, the invention has simple installation and wide application range.
3. According to the double-overhead camshaft diesel engine gear clearance adjusting tool and the method, the eccentric clamp is arranged at the bottom of the third positioning boss, in the gear clearance adjusting process, when the positioning hole is nested on the camshaft provided with the camshaft gear, the eccentric rod is rotated clockwise, the eccentric cam of the eccentric rod moves towards the positioning hole to push the tongue plate to move towards the positioning hole to clamp the camshaft, so that the position of the camshaft idler gear is fixed. Therefore, the invention has simple operation, high reliability and wide application range.
Drawings
Fig. 1 is a schematic structural view of a double overhead camshaft diesel engine lash adjustment tool of the present invention.
Fig. 2 is a schematic view of the structure of the support arm of fig. 1.
FIG. 3 is a top view of the left or right arm of FIG. 1.
FIG. 4 is a cross-sectional view of either the left or right arm of FIG. 1.
FIG. 5 is a schematic illustration of the articulating relationship of the left or right arm to the support arm of FIG. 1.
Fig. 6 is a schematic view of the structure of the base plate in fig. 4.
Fig. 7 is a cross-sectional view of fig. 6.
Fig. 8 is a schematic view of the structure of the tongue plate in fig. 4.
Fig. 9 is a cross-sectional view of fig. 8.
Fig. 10 is a schematic view of a structure of a double overhead camshaft diesel engine lash adjustment according to the present invention using the lash adjustment tool shown in fig. 1.
FIG. 11 is a schematic view of the structure of the idler gear of the camshaft of FIG. 10.
FIG. 12 is a schematic diagram of the clearance adjustment of the first intermediate gear with the camshaft idler gear and the second intermediate gear of the present invention.
In the figure: support arm 1, support bar 11, support column 12, positioning boss 13, hinge plate 14, groove 15, hinge hole 16, support column 17, positioning plate 18, positioning boss 19, left support arm 2, support arm lever 21, mounting hole 22, positioning block 23, positioning block 231, positioning block 232, positioning hole 233, positioning boss 234, eccentric jig 24, bottom plate 241, tongue 242, eccentric rod 243, boss 244, support 245, bolt hole 246, baffle 247, baffle 248, positioning groove 249, support arm column 25, hinge 26, right support arm 3, cam gear 4, cam gear 5, cam idler gear 6, hub hole 61, intermediate gear 7, hub hole 71, center 72, end 73, end 74, intermediate gear 8.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 12, a dual overhead camshaft diesel engine gear gap adjusting tool comprises a supporting arm 1, a left supporting arm 2 and a right supporting arm 3, wherein one end of the supporting arm 1 is provided with a first positioning boss 13 which is mutually perpendicular to the supporting arm, the other end of the supporting arm 1 is connected with a hinge plate 14, a second positioning boss 19 which is mutually perpendicular to the hinge plate 14 is arranged on the hinge plate 14, one ends of the left supporting arm 2 and the right supporting arm 3 are hinged with the hinge plate 14, positioning blocks 23 are arranged at the other ends of the left supporting arm 2 and the right supporting arm 3, the positioning blocks 23 are mutually perpendicular to the left supporting arm 2 and the right supporting arm 3, and positioning holes 233 are formed in the bottoms of the positioning blocks 23.
The support arm 1 includes bracing piece 11, a support column 12, no. two support columns 17, no. one support column 12's one end is connected with No. one location boss 13, no. one support column 12's the other end is connected with the one end of bracing piece 11 perpendicularly, and the other end of bracing piece 11 is connected with hinge dish 14, and hinge dish 14 is connected with No. two support column 17's one end perpendicularly, and No. two support column 17's the other end is connected with locating plate 18 perpendicularly, and locating plate 18 is connected with No. two location boss 19 perpendicularly.
The hinge plate 14 is of a cylindrical structure, the outer peripheral surface of the hinge plate 14 is connected with the supporting rod 11, a groove 15 is formed in the outer peripheral surface of the hinge plate 14, which is far away from the connection position of the hinge plate 14 and the supporting rod 11, a hinge hole 16 is formed in the end surface of the hinge plate 14, and the left support arm 2 and the right support arm 3 are hinged to the hinge plate 14 through the hinge hole 16 after being inserted into the groove 15.
The left support arm 2 and the right support arm 3 respectively comprise a support arm rod 21 and a support arm column 25, the positioning block 23 comprises a first positioning block 231 and a second positioning block 232 which are connected, one end of the support arm rod 21 is provided with a mounting hole 22, the mounting hole 22 is hinged with the hinge hole 16 through a hinge piece 26 after the end is inserted into the groove 15, the other end of the support arm rod 21 is vertically connected with one end of the support arm column 25, the other end of the support arm column 25 is vertically connected with one end face of the first positioning block 231, and the positioning hole 233 is formed in the other end face of the first positioning block 231.
The bottom of No. two locating pieces 232 is provided with No. three location bosss 234, is provided with eccentric anchor clamps 24 on No. three location bosss 234, eccentric anchor clamps 24 include bottom plate 241 and hyoid 242, be provided with boss 244 and support 245 on the bottom plate 241, the bolt hole 246 has been seted up on the boss 244, the cover is equipped with eccentric rod 243 on the support 245, the one end of hyoid 242 is provided with baffle 247, and the other end of hyoid 242 is provided with No. two baffles 248, and No. two baffles 248 are contacted with the eccentric cam of eccentric rod 243, the position that is close to baffle 247 on the hyoid 242 is provided with positioning groove 249, no. three location boss 234 is connected with bolt hole 246 after wearing positioning groove 249.
The utility model provides a two overhead camshaft diesel engine gear gap adjustment method, two overhead camshaft diesel engine include a camshaft gear 4, no. two camshaft gears 5, no. one intermediate gear 7, no. two intermediate gear 8 and with No. one camshaft gear 4, no. two camshaft gears 5 homogeneous phase meshed camshaft idler gear 6, no. two intermediate gear 8 install and lie in the position that keeps away from No. one camshaft gear 4, no. two camshaft gears 5 on one side of camshaft idler gear 6, install No. one intermediate gear 7 between camshaft idler gear 6 and No. two intermediate gear 8, no. one intermediate gear 7 and camshaft idler gear 6, no. two intermediate gear 8 homogeneous phase meshing utilize the aforesaid gear gap adjustment instrument to carry out the gear gap adjustment, the gear gap adjustment method includes the following steps:
the first cam shaft gear 4 and the second cam shaft gear 5 are respectively installed and fixed on a cam shaft of a double overhead cam shaft diesel engine, the cam shaft idler gear 6, the first intermediate gear 7 and the second intermediate gear 8 are placed at preset installation positions, the second intermediate gear 8 is fixed through installation bolts, the second positioning boss 19 is respectively inserted into a hub hole 61 of the cam shaft idler gear 6, the first positioning boss 13 is inserted into a hub eccentric hole 71 of the first intermediate gear 7, at the moment, the cam shaft idler gear 6 moves freely on an installation plane, the positioning holes 233 of the left support arm 2 are respectively nested and fixed on the cam shaft of the first cam shaft gear 4, the positioning holes 233 of the right support arm 3 are nested and fixed on the cam shaft of the second cam shaft gear 5, at the moment, the positions of the cam shaft idler gear 6 are fixed, then the installation bolts of the cam shaft idler gear 6 are screwed, the first intermediate gear 7 is then rotated clockwise or anticlockwise to be close to one end of the second positioning boss 19, and when gaps between the first intermediate gear 7 and the first intermediate gear 6 and the second intermediate gear 8 meet the installation requirements, the first intermediate gear 7 is screwed, and the installation bolts are screwed.
The bottom of the positioning block 23 is also provided with a third positioning boss 234, the third positioning boss 234 is provided with an eccentric clamp 24, the eccentric clamp 24 comprises a bottom plate 241 and a tongue plate 242, the bottom plate 241 is provided with a boss 244 and a support 245, the boss 244 is provided with a bolt hole 246, the support 245 is sleeved with an eccentric rod 243, one end of the tongue plate 242 is provided with a first baffle 247, the other end of the tongue plate 242 is provided with a second baffle 248, the second baffle 248 is contacted with an eccentric cam of the eccentric rod 243, the part of the tongue plate 242, which is close to the first baffle 247, is provided with a positioning groove 249, and the third positioning boss 234 penetrates through the positioning groove 249 and is connected with the bolt hole 246;
the nesting and fixing of the positioning hole 233 of the left support arm 2 on the cam shaft provided with the first cam gear 4 and the nesting and fixing of the positioning hole 233 of the right support arm 3 on the cam shaft provided with the second cam gear 5 means that: the positioning hole 233 of the left support arm 2 is nested on the cam shaft provided with the first cam shaft gear 4, the positioning hole 233 of the right support arm 3 is nested on the cam shaft provided with the second cam shaft gear 5, and then the eccentric rod 243 is rotated clockwise, at this time, the eccentric cam of the eccentric rod 243 moves towards the direction of the positioning hole 233, so as to push the flap 242 to move towards the direction of the positioning hole 233 to clamp the cam shaft.
The principle of the invention is explained as follows:
the design provides a tool and a method for quickly adjusting the gear clearance of a double overhead camshaft diesel engine, wherein the adjusting tool is simple in structure and convenient to use, and two adjusting methods are simultaneously used in the adjusting process to adjust the relative clearance between five gears at one time. The adjusting tool consists of a left support arm, a right support arm and a support arm, one end of the left support arm and one end of the right support arm are connected with the support arm through a hinged disc, and an eccentric clamp on the other end is used for fixing a cam shaft; the hinge plate is of a cylindrical structure, a groove is formed in the peripheral surface of the hinge plate, the part, far away from the joint between the hinge plate and the support rod, of the hinge plate is of a C-shaped structure, hinge holes are formed in the upper and lower parts of the groove on the end surface of the hinge plate, after the left support arm and the right support arm are inserted into the groove, the hinge piece sequentially penetrates through the upper hinge holes, the mounting holes of the left support arm and the right support arm and the lower hinge holes and is fixed, and the left support arm and the right support arm can rotate along the circumference of the groove. Eccentric clamp: the eccentric clamp comprises a bottom plate and a tongue plate, a boss and a support are arranged on the bottom plate, one ends of the bottom plate and the boss, which are close to the positioning hole, are provided with a section of radian, and the first baffle is of an arc-shaped structure, so that the eccentric clamp is designed to be matched with the positioning hole to reliably clamp the cam shaft; the positioning groove in the middle of the tongue plate is nested on the third positioning boss, the bottom plate is arranged on the outer layer of the tongue plate through the mounting bolt, and the tongue plate can move left and right in the middle of the positioning groove; the middle part cover of support is equipped with eccentric pole, and eccentric pole includes pole and the eccentric cam that is connected, and eccentric cam cover is established on the support, and eccentric cam contacts with being the second baffle of arciform, and when the pole atress down moved, eccentric cam left motion promotes the tongue plate left movement clamp camshaft.
The adjusting method mainly comprises the following two parts:
1. the gear backlash adjustment method without positioning comprises the following steps:
(1) After the first cam shaft gear and the second cam shaft gear are installed, the positions are fixed, the cam shaft idler gear, the first intermediate gear and the second intermediate gear are sequentially placed to the preset installation positions, a second positioning boss of the support arm is inserted into a hub hole of the cam shaft idler gear, a first positioning boss of the support arm is inserted into a hub eccentric hole of the first intermediate gear, and the cam shaft idler gear can freely move on an installation plane;
(2) The positioning holes of the left and right support arms are nested on a cam shaft provided with a cam shaft gear and clamped by an eccentric clamp;
(3) The position of the idle gear of the camshaft is fixed, and the mounting bolt is screwed down according to a specified moment.
The mounting flange of the camshaft idler gear is separated from the cylinder cover and is in a suspension state, the length of the support arm is equal to the theoretical center distance, the mounting errors of the cylinder body, the cylinder cover, the camshaft and other parts are fully considered, the actual positions of the three gears are determined on the premise of ensuring the tooth gaps, and the mounting bolts of the camshaft idler gear are screwed.
2. The gear backlash adjusting method based on the eccentric hole of the hub comprises the following steps:
(1) In the adjustment, the second positioning boss of the support arm is fixed in position, and the eccentric hole of the hub of the first intermediate gear is fixed;
(2) The middle gear rotates clockwise/anticlockwise and approaches one end of the first positioning boss, and the other end of the middle gear is offset by a large angle;
(3) And when the gear clearance meets the requirement, the mounting bolt is screwed down according to the specified moment.
Referring to fig. 10 and 12, the second intermediate gear 8 is completely limited by a mounting bolt, one end of the supporting arm 1 is embedded into the camshaft idler gear 6 with the determined position, and the first intermediate gear 7 at the other end can eliminate the influence of position deviation caused by machining errors and mounting errors among components by utilizing the adjustment of the lever principle, so that the adjustment requirement of the gear tooth side gap is ensured. The lever principle is as follows: the wheel hub eccentric hole 71 is fixed by the first positioning boss 13 of the supporting arm 1, the first end 73 which is close to the wheel hub eccentric hole 71 is rotated by a small angle, the second end 74 which is far away from the wheel hub eccentric hole 71 moves by a large angle by utilizing the lever principle, and the requirement of backlash adjustment is met. The gear with the blocked position is used during adjustment, the adjustment is not limited, the operation is simple, the cost is low, and the device is suitable for mass production.
Examples:
referring to fig. 1 to 12, a dual overhead camshaft diesel engine gear gap adjusting tool comprises a supporting arm 1, a left supporting arm 2 and a right supporting arm 3, wherein one end of the supporting arm 1 is provided with a first positioning boss 13 which is mutually perpendicular to the supporting arm 1, the other end of the supporting arm 1 is connected with a hinging disc 14, the hinging disc 14 is provided with a second positioning boss 19 which is mutually perpendicular to the hinging disc 14, one ends of the left supporting arm 2 and the right supporting arm 3 are hinged with the hinging disc 14, the other ends of the left supporting arm 2 and the right supporting arm 3 are provided with positioning blocks 23, the positioning blocks 23 are mutually perpendicular to the left supporting arm 2 and the right supporting arm 3, and the bottom of each positioning block 23 is provided with a positioning hole 233; the support arm 1 comprises a support rod 11, a first support column 12 and a second support column 17, one end of the first support column 12 is connected with a first positioning boss 13, the other end of the first support column 12 is vertically connected with one end of the support rod 11, the other end of the support rod 11 is connected with a hinge plate 14, the hinge plate 14 is vertically connected with one end of the second support column 17, the other end of the second support column 17 is vertically connected with a positioning plate 18, and the positioning plate 18 is vertically connected with a second positioning boss 19; the hinge plate 14 is in a cylindrical structure, the outer peripheral surface of the hinge plate 14 is connected with the support rod 11, a groove 15 is formed in the outer peripheral surface of the hinge plate 14 at a position far away from the connection position of the hinge plate 14 and the support rod 11, a hinge hole 16 is formed in the end surface of the hinge plate 14, and the left support arm 2 and the right support arm 3 are hinged with the hinge plate 14 through the hinge hole 16 after being inserted into the groove 15; the left support arm 2 and the right support arm 3 respectively comprise a support arm rod 21 and a support arm column 25, the positioning block 23 comprises a first positioning block 231 and a second positioning block 232 which are connected, one end of the support arm rod 21 is provided with a mounting hole 22, the mounting hole 22 is hinged with the hinge hole 16 through a hinge piece 26 after being inserted into the groove 15, the other end of the support arm rod 21 is vertically connected with one end of the support arm column 25, the other end of the support arm column 25 is vertically connected with one end face of the first positioning block 231, and the positioning hole 233 is formed in the other end face of the first positioning block 231; the bottom of No. two locating pieces 232 is provided with No. three location bosss 234, is provided with eccentric anchor clamps 24 on No. three location bosss 234, eccentric anchor clamps 24 include bottom plate 241 and hyoid 242, be provided with boss 244 and support 245 on the bottom plate 241, the bolt hole 246 has been seted up on the boss 244, the cover is equipped with eccentric rod 243 on the support 245, the one end of hyoid 242 is provided with baffle 247, and the other end of hyoid 242 is provided with No. two baffles 248, and No. two baffles 248 are contacted with the eccentric cam of eccentric rod 243, the position that is close to baffle 247 on the hyoid 242 is provided with positioning groove 249, no. three location boss 234 is connected with bolt hole 246 after wearing positioning groove 249.
The utility model provides a two overhead camshaft diesel engine gear gap adjustment method, two overhead camshaft diesel engine include a camshaft gear 4, no. two camshaft gears 5, no. one intermediate gear 7, no. two intermediate gear 8 and with No. one camshaft gear 4, no. two camshaft gears 5 homogeneous phase meshed camshaft idler gear 6, no. two intermediate gear 8 install and lie in the position that keeps away from No. one camshaft gear 4, no. two camshaft gears 5 on one side of camshaft idler gear 6, install No. one intermediate gear 7 between camshaft idler gear 6 and No. two intermediate gear 8, no. one intermediate gear 7 and camshaft idler gear 6, no. two intermediate gear 8 homogeneous phase meshing utilize the aforesaid gear gap adjustment instrument to carry out the gear gap adjustment, the gear gap adjustment method includes the following steps: the first cam shaft gear 4 and the second cam shaft gear 5 are respectively installed and fixed on a cam shaft of a double-overhead cam shaft diesel engine, the cam shaft idler gear 6, the first intermediate gear 7 and the second intermediate gear 8 are placed at preset installation positions, the second intermediate gear 8 is fixed through installation bolts, the second positioning boss 19 is respectively inserted into a hub hole 61 of the cam shaft idler gear 6, the first positioning boss 13 is inserted into a hub eccentric hole 71 of the first intermediate gear 7, at the moment, the cam shaft idler gear 6 freely moves on an installation plane, the positioning hole 233 of the left support arm 2 is respectively nested on the cam shaft provided with the first cam shaft gear 4, the positioning hole 233 of the right support arm 3 is nested on the cam shaft provided with the second cam shaft gear 5, then the eccentric rod 243 is rotated clockwise, at the moment, the eccentric cam of the eccentric rod 243 moves towards the direction of the positioning hole 233 to push the tongue plate 242 to move and clamp the cam shaft 233, at the moment, the position of the cam shaft idler gear 6 is fixed, the installation bolts of the cam shaft idler gear 6 are screwed down again, then the first intermediate gear 7 is rotated clockwise or anticlockwise, and when the first intermediate gear 7 is close to the second intermediate gear 7, and the first intermediate gear 7 is installed, and the first intermediate gear 8 is installed, and the requirement of the first intermediate gear 8 is met is screwed.
Claims (4)
1. The utility model provides a two overhead camshaft diesel engine gear gap adjustment method, two overhead camshaft diesel engine include camshaft gear (4), no. two camshaft gears (5), no. one intermediate gear (7), no. two intermediate gear (8) and with camshaft gear (4), no. two camshaft gears (5) homoenergetic's camshaft idler gear (6), no. two intermediate gear (8) install and lie in the position of keeping away from camshaft gear (4), no. two camshaft gears (5) on one side of camshaft idler gear (6), install No. one intermediate gear (7) between camshaft idler gear (6) and No. two intermediate gear (8), no. one intermediate gear (7) and camshaft idler gear (6), no. two intermediate gear (8) homoenergetic, its characterized in that: adjusting the backlash by using a backlash adjusting tool;
the backlash adjusting tool comprises a supporting arm (1), a left supporting arm (2) and a right supporting arm (3), wherein a first positioning boss (13) which is mutually perpendicular to the supporting arm is arranged at one end of the supporting arm (1), a second positioning boss (19) which is mutually perpendicular to the second positioning boss is arranged on the hinge plate (14), one ends of the left supporting arm (2) and the right supporting arm (3) are hinged with the hinge plate (14), positioning blocks (23) are arranged at the other ends of the left supporting arm (2) and the right supporting arm (3), the positioning blocks (23) are mutually perpendicular to the left supporting arm (2) and the right supporting arm (3), and positioning holes (233) are formed in the bottoms of the positioning blocks (23); the bottom of the positioning block (23) is also provided with a third positioning boss (234), the third positioning boss (234) is provided with an eccentric clamp (24), the eccentric clamp (24) comprises a bottom plate (241) and a tongue plate (242), the bottom plate (241) is provided with a boss (244) and a support (245), the boss (244) is provided with a bolt hole (246), the support (245) is sleeved with an eccentric rod (243), one end of the tongue plate (242) is provided with a first baffle (247), the other end of the tongue plate (242) is provided with a second baffle (248), the second baffle (248) is contacted with an eccentric cam of the eccentric rod (243), the part, close to the first baffle (247), of the tongue plate (242) is provided with a positioning groove (249), and the third positioning boss (234) is connected with the bolt hole (246) after passing through the positioning groove (249);
the backlash adjustment method comprises the following steps: firstly, a first cam shaft gear (4) and a second cam shaft gear (5) are respectively installed and fixed on a cam shaft of a double-overhead cam shaft diesel engine, then a cam shaft idler gear (6), a first intermediate gear (7) and a second intermediate gear (8) are placed at preset installation positions, the second intermediate gear (8) is fixed through installation bolts, then a second positioning boss (19) is respectively inserted into a hub hole (61) of the cam shaft idler gear (6), a first positioning boss (13) is inserted into a hub eccentric hole (71) of the first intermediate gear (7), at this time, the cam shaft idler gear (6) freely moves on an installation plane, then the positioning holes (233) of a left support arm (2) are respectively nested and fixed on the cam shaft of the first cam shaft gear (4), the positioning holes (233) of a right support arm (3) are nested and fixed on the cam shaft of the second cam shaft gear (5), at this time, the positions of the cam shaft gears (6) are fixed, then the installation bolts of the first idler gear (6) are screwed down, and then the first intermediate gear (7) and the second intermediate gear (7) are screwed down to meet the requirement of the first intermediate gear (7) when the first intermediate gear (7) is installed, the first intermediate gear (7) is screwed down, at this time, the backlash adjustment method ends;
the method is characterized in that the positioning holes (233) of the left support arm (2) are nested and fixed on a cam shaft provided with a first cam shaft gear (4), and the positioning holes (233) of the right support arm (3) are nested and fixed on a cam shaft provided with a second cam shaft gear (5), which means that: the positioning hole (233) of the left support arm (2) is nested on a cam shaft provided with a first cam shaft gear (4), the positioning hole (233) of the right support arm (3) is nested on a cam shaft provided with a second cam shaft gear (5), and then the eccentric rod (243) is rotated clockwise, at the moment, the eccentric cam of the eccentric rod (243) moves towards the positioning hole (233) so as to push the tongue plate (242) to move towards the positioning hole (233) to clamp the cam shaft.
2. The method for adjusting the tooth clearance of a double overhead camshaft diesel engine according to claim 1, wherein the method comprises the following steps: the support arm (1) includes bracing piece (11), a support column (12), no. two support columns (17), the one end of a support column (12) is connected with a location boss (13), the other end of a support column (12) is connected with the one end of bracing piece (11) perpendicularly, the other end of bracing piece (11) is connected with hinge plate (14), hinge plate (14) are connected with the one end of No. two support columns (17) perpendicularly, the other end of No. two support columns (17) is connected with locating plate (18) perpendicularly, locating plate (18) are connected with No. two location boss (19) perpendicularly.
3. The method for adjusting the backlash of a double overhead camshaft diesel engine according to claim 2, wherein the method comprises the following steps: the hinge plate (14) is of a cylindrical structure, the outer peripheral surface of the hinge plate (14) is connected with the supporting rod (11), a groove (15) is formed in the outer peripheral surface of the hinge plate (14) and located at a position, far away from the hinge plate (14), connected with the supporting rod (11), a hinge hole (16) is formed in the end face of the hinge plate (14), and the left support arm (2) and the right support arm (3) are all inserted into the groove (15) and then hinged with the hinge plate (14) through the hinge hole (16).
4. A method for adjusting the backlash of a double overhead camshaft diesel engine according to claim 3, characterized in that: the left support arm (2) and the right support arm (3) comprise a support arm rod (21) and a support arm column (25), the positioning block (23) comprises a first positioning block (231) and a second positioning block (232) which are connected, one end of the support arm rod (21) is provided with a mounting hole (22), the mounting hole (22) is hinged with the hinge hole (16) through a hinge piece (26) after the end is inserted into the groove (15), the other end of the support arm rod (21) is vertically connected with one end of the support arm column (25), the other end of the support arm column (25) is vertically connected with one end face of the first positioning block (231), the positioning hole (233) is formed in the other end face of the first positioning block (231), and the bottom of the second positioning block (232) is provided with a third positioning boss (234).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710109067.2A CN106870714B (en) | 2017-02-27 | 2017-02-27 | Double overhead camshaft diesel engine tooth clearance adjusting tool and method |
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| CN201710109067.2A CN106870714B (en) | 2017-02-27 | 2017-02-27 | Double overhead camshaft diesel engine tooth clearance adjusting tool and method |
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| CN106870714A CN106870714A (en) | 2017-06-20 |
| CN106870714B true CN106870714B (en) | 2023-07-28 |
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| CN108729977B (en) * | 2018-06-11 | 2023-05-30 | 东风商用车有限公司 | Plugging and disassembling device for engine oil in engine and using method thereof |
| CN110925408B (en) * | 2019-12-18 | 2021-09-24 | 东莞市纽格尔行星传动设备有限公司 | Clearance adjusting device of gear meshing transmission mechanism |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0357511A1 (en) * | 1988-09-01 | 1990-03-07 | Nissan Motor Co., Ltd. | Double overhead camshaft engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2590656Y2 (en) * | 1993-04-22 | 1999-02-17 | 三菱自動車工業株式会社 | Backlash eliminator gear assembly jig |
| JP4655650B2 (en) * | 2005-01-31 | 2011-03-23 | いすゞ自動車株式会社 | Assembling method of gear |
| DE112006001731B4 (en) * | 2005-06-27 | 2014-09-04 | Metaldyne Bsm, Llc | Gear driven balancing shaft device with a control of the Kämmungsspiels |
| CN102235190A (en) * | 2010-04-29 | 2011-11-09 | 广西玉柴机器股份有限公司 | Positioning and fixing device capable of ensuring clearance of overhead camshaft gear of engine |
| US20130047801A1 (en) * | 2011-08-24 | 2013-02-28 | Caterpillar, Inc. | Gear Backlash Tool and Method of Using Same |
| CN206503917U (en) * | 2017-02-27 | 2017-09-19 | 东风商用车有限公司 | Double overhead camshaft diesel engine tooth clearance adjusting tool |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0357511A1 (en) * | 1988-09-01 | 1990-03-07 | Nissan Motor Co., Ltd. | Double overhead camshaft engine |
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