A flywheel ring gear assembly for engineering machinery and assembly method

Abstract

The invention discloses a flywheel gear ring assembly for an engineering machine and an assembly method, comprising a bearing seat, a flywheel and a gear ring; the flywheel is in a disc shape, and a convex ring is provided on its outer edge, and a groove is provided on the rear side of the convex ring; the bearing seat is connected to the rear side of the middle part of the flywheel; a connecting boss ring is provided at the front of the gear ring, and its overall side view is in the shape of a "convex" character; a plurality of torque converter torque bolt holes and gear ring tightening holes are correspondingly provided on the flywheel and the connecting boss ring; the torque converter torque bolt holes and the gear ring tightening holes are distributed alternately; the gear ring is inserted into the groove through the boss ring, and is tightened to the flywheel through the gear ring fixing bolts; a bearing seat shaft hole is provided in the middle of the bearing seat. The invention has the advantages of high installation coplanarity, stable operation, strong reliability and high assembly effect.

Description

Technical Field

[0001] The invention relates to the technical field of flywheel ring gears for engineering machines, and in particular to a flywheel ring gear assembly for engineering machines and an assembly method thereof. Background Art

[0002] The flywheel and ring gear assembly for automobiles is generally manufactured separately for the flywheel and ring gear, and then assembled. This solution facilitates the heat treatment and strengthening of the ring gear separately, and is suitable for mass production. In addition, when the ring gear is damaged during the use of the vehicle, the ring gear can be replaced separately, and the maintenance cost is low. The torque converter, which is a supporting device for engineering machinery such as excavators and loaders, needs to extend the torque output fastening bolts of the torque converter from the front end face of the flywheel housing, pass through the entire flywheel and connect to the torque converter to output torque. The torque converter torque bolt distribution circle is near the interference fit diameter of the ring gear and flywheel, so that the torque converter torque bolt flange is pressed on the end faces of the flywheel and ring gear at the same time. During the manufacturing process, it is impossible to ensure that the front ends of the flywheel and ring gear are completely flush, resulting in a process problem that the torque converter torque bolts cannot be tightened to the required torque. What is more important is that in actual operation, it is difficult to keep the flywheel rotation plane, the ring gear rotation plane and the torque converter rotation plane completely on the same parallel plane (poor coplanarity), which easily leads to problems such as rapid wear or reduced power output efficiency. One of the reasons for this is the processing accuracy of related components, the structure of each component itself, and the installation and debugging process, especially the installation and debugging process. There is currently no effective installation and debugging method.

[0003] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a flywheel ring gear assembly for an engineering machine with good coplanarity, stable operation and high reliability, and an assembly method with good assembly effect.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A flywheel gear ring assembly for an engineering machine comprises a bearing seat, a flywheel and a gear ring; the flywheel is in the shape of a disk, with a convex ring on its outer edge, and a groove on the rear side of the convex ring; the bearing seat is connected to the rear side of the middle part of the flywheel; the front part of the gear ring is provided with a connecting boss ring, and its overall side view is in the shape of a "convex" character; a plurality of torque converter torque bolt holes and gear ring tightening holes are correspondingly provided on the flywheel and the connecting boss ring; the torque converter torque bolt holes and the gear ring tightening holes are alternately distributed; the gear ring is inserted into the groove through the boss ring, and is tightened to the flywheel through the gear ring fixing bolts; a bearing seat shaft hole is provided in the middle part of the bearing seat.

[0007] Furthermore, the gear ring is provided with 8 tightening holes which are evenly distributed in a circle.

[0008] Furthermore, it also includes a gear ring runout inspection fixture; the gear ring runout inspection fixture includes a connecting seat, a horizontal support arm, a test support and a dial indicator; a threaded sleeve is provided at the lower part of the connecting seat, and one end of the horizontal support arm is coupled to the upper part of the connecting seat; the other end of the horizontal support arm is connected to the test support, and a telescopic rod groove is provided at the lower part of the test support; a telescopic rod is movably distributed in the telescopic rod groove; a roller is rotatably distributed at the lower part of the telescopic rod; a dial indicator side head slot is also correspondingly provided at the upper part of the test support; the dial indicator is correspondingly distributed at the upper part of the test support.

[0009] Furthermore, a spring is distributed in the telescopic rod groove, a spring boss is provided on the top of the telescopic rod, and the spring is distributed below the spring boss.

[0010] Furthermore, a support arm slot is provided at the top of the connecting seat, and a fixing screw hole is provided at the bottom of the support arm slot, and then a through hole is correspondingly provided at one end of the horizontal support arm. When connecting, the connection can be fixed by tightening the screw hole.

[0011] The method for assembling a flywheel ring gear assembly for an engineering machine using the above-mentioned method comprises the following steps:

[0012] (1) Tighten and fix the flywheel and the bearing seat by bolts;

[0013] (2) Preliminarily fix the ring gear and the flywheel with the ring gear fixing bolts, then tighten and fix the bottom of the connecting seat of the ring gear runout inspection fixture on the bearing seat, select a horizontal support arm of the corresponding model, and fix the dial indicator;

[0014] (3) Ensure that the roller at the bottom of the telescopic rod squeezes the outer ring plane of the gear ring, and then adjust the dial indicator to zero;

[0015] (4) Then, the ring gear fixing bolts on the ring gear tightening holes at the four positions of the left, right, upper and lower parts are further tightened and fixed using a digital torque wrench, and the flywheel is rotated more than one circle to check the dial indicator runout values ​​at the four positions of the left, right, upper and lower parts. Then, the ring gear fixing bolts at the four positions of the left, right, upper and lower parts are adjusted and tightened by using the digital torque wrench, until the four dial indicator runout values ​​at the four positions are within the standard range values, and at the same time, the respective tightening torque values ​​at the four positions are recorded;

[0016] (5) Tighten the remaining four gear ring fixing bolts. Based on the respective tightening torque values ​​at the four positions recorded in the above steps, when tightening the gear ring fixing bolt on the upper left side, the tightening torque of the gear ring fixing bolt is limited to the tightening torque values ​​of the gear ring fixing bolts on the left side and the upper side; then tighten the gear ring fixing bolts on the upper right side, lower right side and lower left side in turn according to the above method;

[0017] (6) Rotate the flywheel for more than one circle and check the runout value of the dial indicator. If the maximum runout value is within the standard range, the installation is complete. If the maximum runout value exceeds the standard range, use the midpoint line between two adjacent ring gear fixing bolts as the runout value detection midpoint, check each of the above runout value detection midpoints one by one, fine-tune and tighten the ring gear fixing bolts on both sides of the runout value detection midpoint with the largest runout value, and then continue to measure the runout value of each runout value detection midpoint, and then find the runout value detection midpoint with the largest runout value again, and also fine-tune and tighten the ring gear fixing bolts on both sides of it, and repeat this process until the maximum runout value of the runout value detection midpoint is within the standard range, and the installation is complete.

[0018] The beneficial effects of the present invention compared with the prior art are as follows:

[0019] (1) The present invention sets the flywheel into a disc structure with a convex ring and a concave groove, and sets a connecting boss ring corresponding to the gear ring. The gear ring is tightened by 8 gear ring fixing bolts, so that the coplanarity between the rotating surface of the gear ring and the rotating surface of the flywheel can be effectively adjusted, and the stability and reliability of the later operation can be ensured; by combining the bearing seat with the flywheel, the central rotating shaft of the torque converter of the engineering machinery passes through the shaft hole of the bearing seat, and the coplanarity between the rotating surface of the torque converter and the rotating surface of the flywheel can be effectively controlled by the preparation accuracy. Through the above structure / construction and the layout of each component, the high coplanarity of the three rotating surfaces of the flywheel, the gear ring and the torque converter can be effectively guaranteed, ensuring more stable operation and improving reliability.

[0020] (2) By using this method for assembly, the work efficiency of adjusting the coplanarity of the flywheel and the ring gear can be effectively improved, and the adjustment and assembly time can be shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the assembly structure of the bearing seat, flywheel and gear ring of the present invention;

[0022] Figure 2 is a side view of the gear ring of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the gear ring runout inspection fixture of the present invention. DETAILED DESCRIPTION

[0024] like Figures 1 to 3 As shown, a flywheel gear ring assembly for an engineering machine comprises a bearing seat 4, a flywheel 1 and a gear ring 5; the flywheel 1 is in the shape of a disk, and a convex ring 2 is provided on its outer edge, and a groove is provided on the rear side of the convex ring 2 for connecting and installing the gear ring 5; the bearing seat 4 is connected and fixed to the rear side of the middle part of the flywheel 1 by bolts 3; the front part of the gear ring 5 is provided with a connecting boss ring 5-1, and its overall side view is in the shape of a "convex" character; the flywheel 1 corresponds to the connecting boss ring 5-1 on the A plurality of torque converter torque bolt holes 7 and ring gear tightening holes 6 are provided, and are evenly distributed in a circle; the torque converter torque bolt holes 7 and the ring gear tightening holes 6 are distributed alternately, and in this embodiment, the torque converter torque bolt holes 7 and the ring gear tightening holes 6 are each provided with 8; the ring gear 5 is inserted into the groove through the boss ring 5-1, and is tightened to the flywheel through the ring gear fixing bolts; a bearing seat shaft hole 4-1 is provided in the middle of the bearing seat 4 for supporting the center axis of the torque converter. It also includes a gear ring runout test fixture; the gear ring runout test fixture includes a connecting seat 8, a horizontal support arm 11, a test support 12 and a dial indicator 13; the lower part of the connecting seat 8 is provided with a threaded sleeve 8-1 for connecting to the middle outer thread of the bearing seat 4, and one end 10 of the horizontal support arm 11 is combined with the upper part of the connecting seat 8. In this embodiment, a support arm slot 9 is opened on the upper part of the connecting seat 8, and a fixing screw hole 9-1 is provided at the bottom of the support arm slot 9, and then a through hole is opened at one end 10 of the horizontal support arm 11 10-1, when connected, just connect and fix by tightening the screw hole; the other end of the horizontal support arm 11 is connected to the test support 12, and the lower part of the test support 12 is provided with a telescopic rod slot 12-2; a telescopic rod 16 is movably distributed in the telescopic rod slot 12-2; a roller 17 is rotatably distributed in the lower part of the telescopic rod 16; a dial indicator side head slot 12-1 is also correspondingly opened in the upper part of the test support 12; the dial indicator 13 is correspondingly distributed in the upper part of the test support 12, and is tightened and fixed by tightening the bolt 14. A spring 16 is also distributed in the telescopic rod slot 12-2, and a spring boss is provided on the top of the telescopic rod, and the cross section is T-shaped, and the spring 16 is distributed below the spring boss.

[0025] The method for assembling a flywheel ring gear assembly for an engineering machine using the above-mentioned method comprises the following steps:

[0026] (1) Tighten and fix the flywheel and the bearing seat by bolts;

[0027] (2) Preliminarily fix the ring gear and the flywheel with the ring gear fixing bolts, then tighten and fix the bottom of the connecting seat of the ring gear runout inspection fixture on the bearing seat, select a horizontal support arm of the corresponding model, and fix the dial indicator;

[0028] (3) Ensure that the roller at the bottom of the telescopic rod squeezes the outer ring plane of the gear ring, and then adjust the dial indicator to zero;

[0029] (4) Then, the ring gear fixing bolts on the ring gear tightening holes at the four positions of the left, right, upper and lower parts are further tightened and fixed using a digital torque wrench, and the flywheel is rotated more than one circle to check the dial indicator runout values ​​at the four positions of the left, right, upper and lower parts. Then, the ring gear fixing bolts at the four positions of the left, right, upper and lower parts are adjusted and tightened by using the digital torque wrench, until the four dial indicator runout values ​​at the four positions are within the standard range values, and at the same time, the respective tightening torque values ​​at the four positions are recorded;

[0030] (5) Tighten the remaining four gear ring fixing bolts. Based on the respective tightening torque values ​​at the four positions recorded in the above steps, when tightening the gear ring fixing bolt on the upper left side, the tightening torque of the gear ring fixing bolt is limited to the tightening torque values ​​of the gear ring fixing bolts on the left side and the upper side; then tighten the gear ring fixing bolts on the upper right side, lower right side and lower left side in turn according to the above method;

[0031] (6) Rotate the flywheel for more than one circle and check the runout value of the dial indicator. If the maximum runout value is within the standard range, the installation is complete. If the maximum runout value exceeds the standard range, use the midpoint line between two adjacent ring gear fixing bolts as the runout value detection midpoint, check each of the above runout value detection midpoints one by one, fine-tune and tighten the ring gear fixing bolts on both sides of the runout value detection midpoint with the largest runout value, and then continue to measure the runout value of each runout value detection midpoint, and then find the runout value detection midpoint with the largest runout value again, and also fine-tune and tighten the ring gear fixing bolts on both sides of it, and repeat this process until the maximum runout value of the runout value detection midpoint is within the standard range, and the installation is complete.

Claims

1. A method for assembling a flywheel ring gear assembly for an engineering machine, characterized in that: The flywheel gear ring assembly includes a bearing seat, a flywheel and a gear ring; the flywheel is in the shape of a disk, and a convex ring is provided on its outer edge, and a groove is provided on the rear side of the convex ring; the bearing seat is connected to the rear side of the middle part of the flywheel; a connecting boss ring is provided at the front of the gear ring, and the overall side view of the gear ring and the connecting boss ring is in the shape of a "convex" character; a plurality of torque converter torque bolt holes and gear ring tightening holes are correspondingly provided on the flywheel and the connecting boss ring; the torque converter torque bolt holes and the gear ring tightening holes are distributed alternately; the gear ring is inserted into the groove through the connecting boss ring, and is tightened to the flywheel through the gear ring fixing bolts; a bearing seat shaft hole is provided in the middle of the bearing seat; and also includes a gear ring A runout inspection fixture; the gear ring runout inspection fixture comprises a connecting seat, a horizontal support arm, a test support and a dial indicator; a threaded sleeve is provided at the lower part of the connecting seat, and one end of the horizontal support arm is coupled to the upper part of the connecting seat; the other end of the horizontal support arm is connected to the test support, and a telescopic rod slot is provided at the lower part of the test support; a telescopic rod is movably distributed in the telescopic rod slot; a roller is rotatably distributed at the lower part of the telescopic rod; a dial indicator side head slot is also correspondingly provided at the upper part of the test support; the dial indicator is correspondingly distributed at the upper part of the test support; a spring is also distributed in the telescopic rod slot, a spring boss is provided at the top of the telescopic rod, and the spring is distributed below the spring boss; The assembly method includes the following steps: (1) Tighten and fix the flywheel and the bearing seat by bolts; (2) Preliminarily fix the ring gear and the flywheel with the ring gear fixing bolts, then tighten and fix the bottom of the connecting seat of the ring gear runout inspection fixture on the bearing seat, select a horizontal support arm of the corresponding model, and fix the dial indicator; (3) Ensure that the roller at the bottom of the telescopic rod squeezes the outer ring plane of the gear ring, and then adjust the dial indicator to zero; (4) Then, the ring gear fixing bolts on the ring gear tightening holes at the four positions of the left, right, upper and lower parts are further tightened and fixed using a digital torque wrench, and the flywheel is rotated more than one circle to check the dial indicator runout values ​​at the four positions of the left, right, upper and lower parts. Then, the ring gear fixing bolts at the four positions of the left, right, upper and lower parts are adjusted and tightened by using the digital torque wrench, until the four dial indicator runout values ​​at the four positions are within the standard range values, and at the same time, the respective tightening torque values ​​at the four positions are recorded; (5) Tighten the remaining four gear ring fixing bolts. Based on the respective tightening torque values ​​at the four positions recorded in the above steps, when tightening the gear ring fixing bolt on the upper left side, the tightening torque of the gear ring fixing bolt is limited to the tightening torque values ​​of the gear ring fixing bolts on the left side and the upper side; then tighten the gear ring fixing bolts on the upper right side, lower right side and lower left side in turn according to the above method; (6) Rotate the flywheel for more than one circle and check the runout value of the dial indicator. If the maximum runout value is within the standard range, the installation is complete. If the maximum runout value exceeds the standard range, use the midpoint line between two adjacent ring gear fixing bolts as the runout value detection midpoint, check each runout value detection midpoint one by one, fine-tune and tighten the ring gear fixing bolts on both sides of the runout value detection midpoint with the largest runout value, and then continue to measure the runout value of each runout value detection midpoint, and then find the runout value detection midpoint with the largest runout value again, and also fine-tune and tighten the ring gear fixing bolts on both sides of it, and repeat this process until the maximum runout value of the runout value detection midpoint is within the standard range and the installation is complete.

2. A method for assembling a flywheel ring gear assembly for an engineering machine according to claim 1, characterized in that: A support arm slot is provided on the upper portion of the connection seat, and a fixing screw hole is provided at the bottom of the support arm slot, and a through hole is correspondingly provided at one end of the horizontal support arm.

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