CN108583736B - Method for assembling front axle of dump truck - Google Patents
Method for assembling front axle of dump truck Download PDFInfo
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- CN108583736B CN108583736B CN201810361535.XA CN201810361535A CN108583736B CN 108583736 B CN108583736 B CN 108583736B CN 201810361535 A CN201810361535 A CN 201810361535A CN 108583736 B CN108583736 B CN 108583736B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
- B62D65/02—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
- B62D65/02—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components
- B62D65/12—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components the sub-units or components being suspensions, brakes or wheel units
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- Mechanical Engineering (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The method for assembling the front axle of the dump truck comprises the following steps: firstly, preparing before assembly; secondly, assembling a front wheel assembly; thirdly, assembling a steering tie rod assembly; fourthly, assembling the front axle and the steering system assembly; the assembling method is convenient and quick to operate, and the operating process is reasonable in design.
Description
Technical Field
The invention relates to a method for assembling a front axle of a dumper.
Background
At present, the assembly operation of the front axle and the steering system assembly of the 150-ton electric drive dumper is not carried out in a specific standard, great trouble is caused to assembly operators, and the production process of the whole dumper is also influenced by the operation guidance of the standard.
Disclosure of Invention
The invention aims to provide a dumper front axle assembling method which is convenient and quick to operate and reasonable in operation process design.
In order to solve the technical problem, the invention comprises the following steps:
firstly, preparation work before assembly: before assembly, cleaning parts, and simultaneously rechecking main fit dimensions and related precision of the parts and the parts, wherein the main fit dimensions comprise interference fit dimensions, and after the lubrication points of the parts and the parts are assembled, a proper amount of lubricating oil or grease must be injected, so that tools and measuring tools which are installed or checked are checked to ensure that the parts and the parts cannot be polluted and rusted;
secondly, assembling a front wheel assembly:
(1) heating the hub to 100 ℃, vertically placing the hub on a horizontal workbench, correctly judging the orientation of the outer side bearing, placing the outer ring of the outer side bearing into the hub, cooling, and checking the axial gap between the outer ring of the outer side bearing and the hub by using a feeler gauge of 0.05mm after cooling, wherein the feeler gauge cannot be plugged in;
(2) heating the hub provided with the outer ring of the outer bearing to 100 ℃, vertically placing the hub on a horizontal workbench, correctly judging the orientation of the inner bearing, placing the outer ring of the inner bearing into the hub, cooling, and checking the axial gap between the outer ring of the inner bearing and the hub by using a 0.05mm feeler gauge after cooling, wherein the feeler gauge cannot be plugged in;
(3) heating the speed measuring fluted disc to 238 ℃, then installing the speed measuring fluted disc on the hub, cooling, and then checking the axial clearance between the speed measuring fluted disc and the hub by using a 0.05mm feeler gauge which cannot be plugged in;
(4) pressing the oil seal onto the hub;
(5) mounting the brake disc on the hub;
(6) the steering knuckle is vertically placed on a working platform, the shaft end faces upwards, the shaft shoulder is installed on the steering knuckle firstly, the axial gap between the shaft shoulder and the steering knuckle is checked by using a 0.05mm feeler gauge, and the feeler gauge cannot be plugged in. Heating the inner side bearing inner ring again, heating the inner side bearing inner ring to 90 ℃, sliding the inner side bearing inner ring into the steering knuckle spindle, pressing the large end face of the inner side bearing inner ring against a shaft shoulder, applying pressure to the inner ring of the inner side bearing, so that the large end face of the inner side bearing inner ring is always pressed against the shaft shoulder in the cooling process, and checking the shaft gap between the inner side bearing inner ring and the shaft shoulder by using a 0.05mm clearance gauge after the inner side bearing inner ring is cooled to room temperature, wherein the clearance gauge cannot be plugged in;
(7) mounting the brake mounting seat on the steering knuckle;
(8) mounting the hub with the outer ring pressed on the steering knuckle spindle completed in the previous step, heating the inner ring of the outer bearing to 90 ℃, sliding the inner ring of the outer bearing into the steering knuckle spindle without completely positioning, cooling the inner ring to room temperature, locking the bearing positioning plate by using four bolts, pressing the bearing into a small amount by the bearing positioning plate, and after the step is completed, tightly attaching the bearing positioning plate to the outer large end surface of the inner ring of the outer bearing, wherein a certain amount of play exists between the bearings;
(9) after all parts return to the room temperature, measuring the installation clearance of the bearing;
(10) calculating the thickness of the bearing adjusting gasket, adding the gasket according to the calculated thickness of the bearing adjusting gasket when all the components return to the room temperature, and installing a bearing positioning plate;
(11) filling lubricating grease into an inner cavity of the bearing, mounting an O-shaped sealing ring on an end cover after the filling is finished, coating the lubricating grease on the O-shaped sealing ring, coating le tai gum on the matching end surface of a hub end cover and a hub, mounting the end cover on the hub, coating the lubricating grease on a plug screw O-shaped ring, and fastening the plug screw O-shaped ring on the end cover;
(12) mounting the front axle brake on the brake mounting seat;
(13) mounting the sensor fixing plate and the sensor on the front wheel assembly;
(14) mounting the inflating valve on the front rim, and assembling the tire and the front rim together;
thirdly, assembling a steering tie rod assembly:
(1) respectively installing two joint bearings on a left tie rod joint and a right tie rod joint in a pressing manner, and then respectively installing check rings on the left tie rod joint and the right tie rod joint;
(2) respectively installing a left tie rod joint and a right tie rod joint on a tie rod, and enabling the opening direction of a locking clamp plate of the tie rod to face an installer, wherein the left tie rod joint is positioned on the left side of the installer;
fourthly, assembling the front axle and the steering system assembly:
(1) respectively installing the left steering knuckle arm and the right steering knuckle arm on the front wheel assembly;
(2) a piston rod of the front suspension cylinder penetrates into a steering knuckle of the front wheel assembly, and the front suspension cylinder and the steering knuckle of the front wheel assembly are fixed through a bolt;
(3) connecting the steering tie rod assembly to the left and right knuckle arms by using a pin shaft and a bolt;
(4) one end of the power steering cylinder is connected with the knuckle arm, the other end of the power steering cylinder is connected with the frame, an oil pipe interface on a cylinder body of the power steering cylinder faces the outer side of the frame, and a grease filling interface on a piston rod faces the outer side of the knuckle arm;
(5) after the other parts of the whole vehicle are installed, installing a tire and a front rim;
(6) checking the air pressure of the tire; checking a toe-in value of the front wheel; the empty minimum ground clearance is checked.
As a further improvement of the present invention, in step two (1): applying pressure to the outer ring of the outer bearing to prevent a gap between the outer ring of the bearing and the hub during cooling; in step two (2): applying pressure to the outer ring of the inner bearing to prevent a gap between the outer ring of the bearing and the hub during cooling; in step two (3): pressure is applied to the speed measuring fluted disc to prevent the fluted disc and the hub from generating a gap in the cooling process.
As a further improvement of the present invention, in step two (4), a wood block and a wood or rubber hammer are used to lightly knock the oil seal into the seat hole of the hub, and the knocking method is as follows: a. placing a wood block above the oil seal; b. knocking the central part of the wood block by a hammer; c. then the hammer is used for beating along the outer edge of the wood block in a rotating way; d. repeating the operations until the oil seal completely enters the seat hole of the hub, and checking the axial clearance between the oil seal and the hub by using a feeler gauge of 0.05mm after the oil seal is installed in place, wherein the feeler gauge cannot be plugged in; e. grease is applied to the rubber portion of the oil seal.
As a further improvement of the invention, in step two (9), the specific steps of measuring the mounting play of the bearing are as follows: a. when the installation process is verified, firstly, the assembly completed in the step two (7) is hoisted by a crane, a steering knuckle is rotated, an outer side bearing is stressed to rotate, a dial indicator instrument magnetic seat is placed on a hub at a position corresponding to 180 degrees, a wire meter measuring point is placed on a bearing positioning plate, marks are drawn at a measuring position, a wire meter is zeroed, the total weight of the assembly is recorded, the steering knuckle is gently placed on the ground through an electronic crane scale, different forces are maintained to act on the bearing, change values of the steering knuckle under various forces are read from the wire meter and recorded, finally, the crane is not stressed any more, the weight of the hub is loaded on an inner side bearing, and through the measurement, the weight of the hub is determined, the influence of the weight of the steering knuckle on a clearance is determined, and a compensation value S is obtained; b. when production and installation are carried out, the assembly completed in the step two (7) is vertically placed on a workbench, a hub is upward, the hub is rotated, so that a roller and a raceway of an inner side bearing are in mutual contact under the action of the gravity of the hub, a dial indicator magnetic base is placed on the hub at a position corresponding to 180 degrees, a wire indicator measuring point is placed on a bearing positioning plate, a wire indicator is adjusted to zero, the hub is hoisted, a steering knuckle is rotated, the inner and outer sides of the bearing move relatively, the raceways in the outer side bearing are in mutual contact, and a measuring point returns to a mark position to obtain a wire indicator reading C; in step two (10), the thickness value of the bearing adjusting shim is the sum of the thread meter reading C, the play value and the compensation value S.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a structural view of a front wheel assembly of the dump truck of the present invention.
Fig. 2 is an enlarged schematic view of the symbol I of fig. 1.
Fig. 3 is a structural view of a tie rod assembly of the dump truck of the present invention.
Fig. 4 is a structural diagram of a front axle and steering system assembly of the dump truck of the present invention.
Detailed Description
As shown in fig. 1 to 4, the present invention includes the following steps:
firstly, preparation work before assembly: before assembly, cleaning the parts, and simultaneously rechecking the main fit sizes and related precision of the parts and the parts, wherein the main fit sizes comprise interference fit sizes, and after the lubrication points of the parts and the parts are assembled, a proper amount of lubricating oil or grease must be injected, so that tools and measuring tools which are installed or checked are checked to ensure that the tools and the measuring tools cannot be polluted and rusted;
secondly, assembling a front wheel assembly:
(1) heating the hub 6 to 100 ℃, vertically placing the hub on a horizontal workbench, correctly judging the orientation of the outer bearing 18, judging the orientation because the outer bearing 18 has two sides, avoiding reverse installation, placing the outer ring of the outer bearing 18 into the hub 6, cooling, applying pressure to the outer ring of the outer bearing 18 to prevent a gap between the outer ring of the bearing and the hub 6 in the cooling process, checking the axial gap between the outer ring of the outer bearing 18 and the hub 6 by using a 0.05mm feeler gauge after cooling, wherein the feeler gauge cannot be plugged in;
(2) heating the hub 6 provided with the outer ring of the outer bearing 18 to 100 ℃, vertically placing the hub on a horizontal workbench, correctly judging the orientation of the inner bearing 24, judging the orientation because the inner bearing 24 has two sides, avoiding reverse installation, placing the outer ring of the inner bearing 24 into the hub 6, cooling, applying pressure to the outer ring of the inner bearing 24 to prevent a gap between the outer ring of the bearing and the hub 6 in the cooling process, and checking the axial gap between the outer ring of the inner bearing 24 and the hub 6 by using a 0.05mm clearance gauge after cooling, wherein the clearance gauge cannot be plugged;
(3) heating the speed measuring fluted disc 35 to 238 ℃, then installing the speed measuring fluted disc on the hub 6, cooling the speed measuring fluted disc, applying pressure to the speed measuring fluted disc 35 to prevent the fluted disc and the hub 6 from generating a gap in the cooling process, and checking the axial gap between the speed measuring fluted disc 35 and the hub 6 by using a 0.05mm feeler gauge after cooling, wherein the feeler gauge cannot be plugged in;
(4) the oil seal 34 is pressed on the hub 6, the oil seal 34 is lightly knocked into a seat hole of the hub 6 by using a wood block and a wood or rubber hammer, and the knocking method comprises the following steps: a. placing the wood block over the oil seal 34; b. knocking the central part of the wood block by a hammer; c. then the hammer is used for beating along the outer edge of the wood block in a rotating way; d. repeating the above operations until the oil seal 34 completely enters the seat hole of the hub 6, and after the oil seal is installed in place, checking the axial clearance between the oil seal 34 and the hub 6 by using a feeler gauge of 0.05mm, wherein the feeler gauge cannot be plugged in; e. applying grease to the rubber portion of the oil seal 34;
(5) mounting the brake disc 23 on the hub 6;
(6) the steering knuckle 26 is vertically placed on the working platform, the shaft end faces upwards, the shaft shoulder 25 is installed on the steering knuckle 26, the axial gap between the shaft shoulder 25 and the steering knuckle 26 is checked by using a 0.05mm clearance gauge, and the clearance gauge cannot be plugged in. Reheating an inner ring of the inner side bearing 24, heating to 90 ℃, sliding the inner ring of the inner side bearing 24 into a main shaft of the steering knuckle 26, pressing a large end face of the inner ring of the inner side bearing 24 against a shaft shoulder 25, applying pressure to the inner ring of the inner side bearing 24, pressing the large end face of the inner ring of the inner side bearing 24 against the shaft shoulder 25 all the time in the cooling process, and checking an inter-shaft gap between the inner ring of the inner side bearing 24 and the shaft shoulder 25 by using a 0.05mm feeler gauge after the inner ring of the inner side bearing 24 is cooled to room temperature, wherein the feeler gauge;
(7) mounting the brake mount 29 to the knuckle 26;
(8) mounting the hub 6 with the outer ring pressed on the spindle of the steering knuckle 26 completed in the previous step, heating the inner ring of the outer bearing 18, heating the temperature to 90 ℃, sliding the inner ring of the outer bearing 18 into the spindle of the steering knuckle 26 without completely positioning, cooling the spindle to room temperature, locking the bearing positioning plate 13 by using four bolts, pressing the bearing into a small amount by the bearing positioning plate 13, after the step is completed, tightly attaching the bearing positioning plate 13 to the outer large end surface of the inner ring of the outer bearing 18, and forming a certain amount of clearance between the bearings;
(9) and after all parts return to the room temperature, measuring the mounting clearance of the bearing, wherein the specific steps of measuring the mounting clearance of the bearing are as follows: a. during the verification of the installation process, firstly, the assembly completed in the step two (7) is hoisted by a crane, the steering knuckle 26 is rotated, the outer bearing 18 is forced to rotate, the dial indicator instrument magnetic seat is placed on the hub 6 at a position corresponding to 180 degrees, the wire meter measuring point is placed on the bearing positioning plate 13, marks are drawn at the measuring position, the wire meter is adjusted to zero, the total weight of the assembly is recorded, the steering knuckle 26 is gently placed on the ground through an electronic crane scale, different forces are maintained to act on the bearing, the change values under various forces are read from the wire meter and recorded, finally, the crane is not stressed any more, the weight of the hub 6 is loaded on the inner bearing 24, and through the measurement, the weight of the hub 6 is determined, the influence of the weight of the steering knuckle 26 on the play is obtained, and the compensation value S is obtained; b. when in production and installation, the assembly completed in the step (7) is vertically placed on a workbench, the hub 6 is upward, the hub 6 is rotated, the rollers and the raceways are in mutual contact under the action of the gravity of the hub 6 by the inner bearing 24, the dial indicator magnetic seat is placed on the hub 6 at a position corresponding to 180 degrees, the wire indicator measuring point is placed on the bearing positioning plate 13, the wire indicator is zeroed, the hub 6 is hoisted, the steering knuckle 26 is rotated, the inner and outer relative movement of the bearing is realized, the raceways in the outer bearing 18 are in mutual contact, and the measuring point is returned to the mark position to obtain the wire indicator reading C; in the step (10), the thickness value of the bearing adjusting shim 15 is the sum of the thread meter reading C, the play value and the compensation value S;
(10) calculating the thickness of the bearing adjusting gasket 15, adding gaskets according to the calculated thickness of the bearing adjusting gasket 15 and installing the bearing positioning plate 13 when all the components return to the room temperature;
(11) filling lubricating grease into the inner cavity of the bearing, mounting an O-shaped sealing ring 9 on an end cover 12 after the grease filling is finished, coating the lubricating grease on the O-shaped sealing ring 9, coating le tai glue on the matching end surface of the end cover 12 of the hub 6 and the hub 6, mounting the end cover 12 on the hub 6, coating the lubricating grease on the plug screw O-shaped ring, and fastening the plug screw O-shaped ring on the end cover 12;
(12) mounting the front axle brake 33 on the brake mounting seat 29;
(13) mounting the sensor fixing plate 40 and the sensor 39 on the front wheel assembly;
(14) mounting the valve 5 on the front rim 4, and assembling the tire 3 and the front rim 4 together;
thirdly, assembling the steering tie rod 7 assembly:
(1) respectively pressing and installing the two joint bearings 2 on the left tie rod joint 45 and the right tie rod joint 8, and then installing the retainer ring 1 on the left tie rod joint 45 and the right tie rod joint 8;
(2) respectively installing a left tie rod joint 45 and a right tie rod joint 8 on a tie rod 7, and enabling the opening direction of a locking clamp plate of the tie rod 7 to face an installer, wherein the left tie rod joint 45 is positioned on the left side of the installer;
fourthly, assembling the front axle and the steering system assembly:
(1) respectively installing the left steering knuckle arm and the right steering knuckle arm on the front wheel assembly;
(2) a piston rod of the front suspension cylinder penetrates into a steering knuckle 26 of the front wheel assembly, and the front suspension cylinder and the steering knuckle 26 of the front wheel assembly are fixed through a bolt;
(3) connecting the steering tie rod 7 assembly to the left and right knuckle arms by using a pin shaft and a bolt;
(4) one end of the power steering cylinder is connected with the steering knuckle 26 arm, the other end of the power steering cylinder is connected with the frame, an oil pipe interface on the cylinder body of the power steering cylinder faces the outer side of the frame, and a grease filling interface on the piston rod faces the outer side of the steering knuckle 26 arm;
(5) after the other parts of the whole vehicle are installed, installing a tire and a front wheel rim 4;
(6) checking the air pressure of the tire; checking a toe-in value of the front wheel; the empty minimum ground clearance is checked.
Claims (4)
1. A dumper front axle assembling method is characterized by comprising the following steps:
firstly, preparation work before assembly: before assembly, cleaning parts, and simultaneously rechecking main fit dimensions and related precision of the parts and the parts, wherein the main fit dimensions comprise interference fit dimensions, and after the lubrication points of the parts and the parts are assembled, a proper amount of lubricating oil or grease must be injected, so that tools and measuring tools which are installed or checked are checked to ensure that the parts and the parts cannot be polluted and rusted;
secondly, assembling a front wheel assembly:
(1) heating the hub to 100 ℃, vertically placing the hub on a horizontal workbench, correctly judging the orientation of the outer side bearing, placing the outer ring of the outer side bearing into the hub, cooling, and checking the axial gap between the outer ring of the outer side bearing and the hub by using a feeler gauge of 0.05mm after cooling, wherein the feeler gauge cannot be plugged in;
(2) heating the hub provided with the outer ring of the outer bearing to 100 ℃, vertically placing the hub on a horizontal workbench, correctly judging the orientation of the inner bearing, placing the outer ring of the inner bearing into the hub, cooling, and checking the axial gap between the outer ring of the inner bearing and the hub by using a 0.05mm feeler gauge after cooling, wherein the feeler gauge cannot be plugged in;
(3) heating the speed measuring fluted disc to 238 ℃, then installing the speed measuring fluted disc on the hub, cooling, and then checking the axial clearance between the speed measuring fluted disc and the hub by using a 0.05mm feeler gauge which cannot be plugged in;
(4) pressing the oil seal onto the hub;
(5) mounting the brake disc on the hub;
(6) vertically placing the steering knuckle on a working platform, enabling the shaft end to face upwards, firstly installing a shaft shoulder on the steering knuckle, and checking an axial gap between the shaft shoulder and the steering knuckle by using a 0.05mm feeler gauge which cannot be plugged in;
heating the inner side bearing inner ring again, heating the inner side bearing inner ring to 90 ℃, sliding the inner side bearing inner ring into the steering knuckle spindle, pressing the large end face of the inner side bearing inner ring against a shaft shoulder, applying pressure to the inner ring of the inner side bearing, so that the large end face of the inner side bearing inner ring is always pressed against the shaft shoulder in the cooling process, and checking the shaft gap between the inner side bearing inner ring and the shaft shoulder by using a 0.05mm clearance gauge after the inner side bearing inner ring is cooled to room temperature, wherein the clearance gauge cannot be plugged in;
(7) mounting the brake mounting seat on the steering knuckle;
(8) mounting the hub with the outer ring pressed on the steering knuckle spindle completed in the previous step, heating the inner ring of the outer bearing to 90 ℃, sliding the inner ring of the outer bearing into the steering knuckle spindle without completely positioning, cooling the inner ring to room temperature, locking the bearing positioning plate by using four bolts, pressing the bearing into a small amount by the bearing positioning plate, and after the step is completed, tightly attaching the bearing positioning plate to the outer large end surface of the inner ring of the outer bearing, wherein a certain amount of play exists between the bearings;
(9) after all parts return to the room temperature, measuring the installation clearance of the bearing;
(10) calculating the thickness of the bearing adjusting gasket, adding the gasket according to the calculated thickness of the bearing adjusting gasket when all the components return to the room temperature, and installing a bearing positioning plate;
(11) filling lubricating grease into an inner cavity of the bearing, mounting an O-shaped sealing ring on an end cover after the filling is finished, coating the lubricating grease on the O-shaped sealing ring, coating le tai gum on the matching end surface of a hub end cover and a hub, mounting the end cover on the hub, coating the lubricating grease on a plug screw O-shaped ring, and fastening the plug screw O-shaped ring on the end cover;
(12) mounting the front axle brake on the brake mounting seat;
(13) mounting the sensor fixing plate and the sensor on the front wheel assembly;
(14) mounting the inflating valve on the front rim, and assembling the tire and the front rim together;
thirdly, assembling a steering tie rod assembly:
(1) respectively installing two joint bearings on a left tie rod joint and a right tie rod joint in a pressing manner, and then respectively installing check rings on the left tie rod joint and the right tie rod joint;
(2) respectively installing a left tie rod joint and a right tie rod joint on a tie rod, and enabling the opening direction of a locking clamp plate of the tie rod to face an installer, wherein the left tie rod joint is positioned on the left side of the installer;
fourthly, assembling the front axle and the steering system assembly:
(1) respectively installing the left steering knuckle arm and the right steering knuckle arm on the front wheel assembly;
(2) a piston rod of the front suspension cylinder penetrates into a steering knuckle of the front wheel assembly, and the front suspension cylinder and the steering knuckle of the front wheel assembly are fixed through a bolt;
(3) connecting the steering tie rod assembly to the left and right knuckle arms by using a pin shaft and a bolt;
(4) one end of the power steering cylinder is connected with the knuckle arm, the other end of the power steering cylinder is connected with the frame, an oil pipe interface on a cylinder body of the power steering cylinder faces the outer side of the frame, and a grease filling interface on a piston rod faces the outer side of the knuckle arm;
(5) after the other parts of the whole vehicle are installed, installing a tire and a front rim;
(6) checking the air pressure of the tire; checking a toe-in value of the front wheel; the empty minimum ground clearance is checked.
2. The method of assembling a front axle of a dump truck according to claim 1, wherein: in step two (1): applying pressure to the outer ring of the outer bearing to prevent a gap between the outer ring of the bearing and the hub during cooling; in step two (2): applying pressure to the outer ring of the inner bearing to prevent a gap between the outer ring of the bearing and the hub during cooling; in step two (3): pressure is applied to the speed measuring fluted disc to prevent the fluted disc and the hub from generating a gap in the cooling process.
3. The method of assembling a front axle of a dump truck according to claim 1, wherein: in the step (4) of the second step, the oil seal is lightly knocked into the seat hole of the hub by using a wood block and a wood or rubber hammer, and the knocking method is as follows: a. placing a wood block above the oil seal; b. knocking the central part of the wood block by a hammer; c. then the hammer is used for beating along the outer edge of the wood block in a rotating way; d. repeating the operations until the oil seal completely enters the seat hole of the hub, and checking the axial clearance between the oil seal and the hub by using a feeler gauge of 0.05mm after the oil seal is installed in place, wherein the feeler gauge cannot be plugged in; e. grease is applied to the rubber portion of the oil seal.
4. The method of assembling a front axle of a dump truck according to claim 1, wherein: in step two (9), the specific steps of measuring the mounting play of the bearing are as follows: a. when the installation process is verified, firstly, the assembly completed in the step two (7) is hoisted by a crane, a steering knuckle is rotated, an outer side bearing is stressed to rotate, a dial indicator instrument magnetic seat is placed on a hub at a position corresponding to 180 degrees, a wire meter measuring point is placed on a bearing positioning plate, marks are drawn at a measuring position, a wire meter is zeroed, the total weight of the assembly is recorded, the steering knuckle is gently placed on the ground through an electronic crane scale, different forces are maintained to act on the bearing, change values of the steering knuckle under various forces are read from the wire meter and recorded, finally, the crane is not stressed any more, the weight of the hub is loaded on an inner side bearing, and through the measurement, the weight of the hub is determined, the influence of the weight of the steering knuckle on a clearance is determined, and a compensation value S is obtained; b. when production and installation are carried out, the assembly completed in the step two (7) is vertically placed on a workbench, a hub is upward, the hub is rotated, so that a roller and a raceway of an inner side bearing are in mutual contact under the action of the gravity of the hub, a dial indicator magnetic base is placed on the hub at a position corresponding to 180 degrees, a wire indicator measuring point is placed on a bearing positioning plate, a wire indicator is adjusted to zero, the hub is hoisted, a steering knuckle is rotated, the inner and outer sides of the bearing move relatively, the raceways in the outer side bearing are in mutual contact, and a measuring point returns to a mark position to obtain a wire indicator reading C; in step two (10), the thickness value of the bearing adjusting shim is the sum of the thread meter reading C, the play value and the compensation value S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810361535.XA CN108583736B (en) | 2018-04-20 | 2018-04-20 | Method for assembling front axle of dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810361535.XA CN108583736B (en) | 2018-04-20 | 2018-04-20 | Method for assembling front axle of dump truck |
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| Publication Number | Publication Date |
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| CN108583736A CN108583736A (en) | 2018-09-28 |
| CN108583736B true CN108583736B (en) | 2020-11-03 |
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