Axial adjustment mechanism for input shaft of precision reducer

Abstract

The present invention provides an axial adjustment mechanism for the input shaft of a precision reducer, and belongs to the field of mechanical technology. It solves the problem of low adjustment accuracy of existing precision reducers. The precision reducer includes a housing with an axial hole, an input shaft and a transmission wheel both arranged in the housing, and the axial adjustment mechanism of the input shaft includes a locking bolt, a locking nut plate and an adjustment sleeve with one end slidingly inserted into the axial hole, one end of the input shaft is axially fixed in the adjustment sleeve, the locking nut plate is sleeved outside the adjustment sleeve and is threadedly connected to the adjustment sleeve, one side of the locking nut plate has a clamping notch that runs from the inner ring to the outer ring, and the locking nut plate is also connected to a fastener that can tighten the clamping notch to lock the thread between the locking nut plate and the adjustment sleeve, and the locking nut plate is pressed against the housing by the locking bolt. There will be no tilting or displacement between the locking nut plate and the adjustment sleeve of the axial adjustment mechanism, and the accuracy after adjustment is higher, which reduces the wear of the worm gear.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to an axial adjustment mechanism for an input shaft of a precision reducer. Background Art

[0002] Precision reducer is a power transmission mechanism that uses a gear speed converter to reduce the number of revolutions of the motor to the desired number of revolutions and obtain a larger torque. Precision reducer has the characteristics of large transmission ratio, wide range, high precision, small backlash, large load capacity, high efficiency, small size, light weight, smooth transmission, low noise, can transmit motion to sealed space, large output stiffness, small backlash, etc. It is now widely used in space technology, energy, electronics industry, petrochemical industry, military industry, robots, instrumentation, textile machinery, printing machinery, packaging machinery, lifting and transportation machinery, medical equipment, food processing machinery and other industries. Precision reducer is a relatively precise machine. The purpose of using it is to reduce the speed and increase the torque. Precision reducer is mainly divided into two types according to the output direction: linear type and angular type.

[0003] An existing angular precision reducer, such as the patent previously applied for by the applicant (application number: 201710741366.8), discloses a worm gear reducer, comprising a housing with an axial hole, a worm wheel arranged in the housing, a worm slidably inserted into the axial hole, an adjusting sleeve and a locking bolt, the adjusting sleeve being arranged at the end of the housing near the output end of the worm and axially fixed to the output end of the worm, one end of the adjusting sleeve being slidably inserted into the axial hole, and the outer peripheral wall of the other end being provided with a protruding annular ridge, the screw portion of the locking bolt passing through the annular ridge is threadedly connected to the housing, and the head of the locking bolt is pressed against the annular ridge, an adjusting counterbore is provided on the end surface of the housing near the output end of the worm, one end of the axial hole passes through the bottom of the adjusting counterbore, and a gap is provided between the annular ridge and the bottom surface of the adjusting counterbore, a clamping nut is sleeved outside the annular ridge and threadedly connected to the annular ridge, one end of the clamping nut is slidably inserted into the adjusting counterbore and can be pressed against the bottom surface of the adjusting counterbore by sliding.

[0004] In the above-mentioned reducer, a certain gap must be maintained between the annular convex edge and the bottom surface of the adjusting countersunk hole so that the adjustment spacing size is infinite. Due to the existence of the above-mentioned gap, in order to ensure better stability, support is achieved by pressing the clamping nut against the bottom of the adjusting countersunk hole, so that the worm gear is always in a tightly fitted state, there is no gap, the adjustment accuracy is high, and the wear of the worm gear is reduced. However, the above-mentioned reducer still has the following defects: the fixing of the adjusting sleeve is achieved by pressing the annular convex edge with the locking bolt and cooperating with the locking nut. In the process of tightening the locking bolt to press the annular convex edge against the housing, since the annular convex edge and the locking nut are threadedly matched, there is a certain gap between the threads. After tightening the locking bolt on one side of the annular convex edge, the annular convex edge is easily tilted in the thread gap due to the different changes in the forces on both sides, and the inclination cannot be adjusted back, that is, one side of the locking bolt is pressed inwardly and the other side is tilted outwardly. After tightening one side, the locking bolt on the other side is tightened. Due to the action of the locking force, the locking bolt on this side can only press the annular convex edge against the housing, and it is impossible to pull the inclination back to a flat state. That is to say, although the above-mentioned reducer can achieve infinite adjustment of the spacing and can eliminate the respective thread gaps to a certain extent, during the locking process, the annular flange and the clamping nut are prone to tilting and warping, which leads to a decrease in the adjusted accuracy, and as a result, there will still be a certain gap between the worm gear and the worm, which is likely to cause vibration and noise after running for a long time, and aggravate the wear of the worm gear. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to propose an axial adjustment mechanism for the input shaft of a precision reducer. The technical problem to be solved by the present invention is: how to improve the accuracy of the axial adjustment of the input shaft.

[0006] The objectives of the present invention can be achieved through the following technical solutions: an axial adjustment mechanism for the input shaft of a precision reducer, the precision reducer comprising a shell with an axial hole, an input shaft and a transmission wheel both arranged in the shell, the axial adjustment mechanism of the input shaft comprising a locking bolt, an annular locking nut plate and an adjustment sleeve with one end slidingly inserted into the axial hole, one end of the input shaft is axially fixed in the adjusting sleeve, the locking nut plate is sleeved outside the adjusting sleeve and is threadedly connected to the adjusting sleeve, characterized in that one side of the locking nut plate has a clamping notch extending from the inner ring to the outer ring, the locking nut plate is also connected to a fastener that can tighten the clamping notch to lock the thread between the locking nut plate and the adjusting sleeve, and the locking nut plate is pressed against the shell by a locking bolt.

[0007] One end of the input shaft on this angular precision reducer is axially fixed and circumferentially rotatably connected in the adjusting sleeve, and the other end is used to connect with the drive motor. The tooth thickness of the input shaft becomes thicker from one end to the other end. When installing and adjusting, push the adjusting sleeve to slide into the shell and drive the input shaft to move, so that the input shaft and the transmission wheel are connected through the meshing teeth with the smallest gap, and then rotate the locking nut plate. The locking nut plate moves inward relative to the adjusting sleeve through the thread cooperation until it is close to the shell, and then tighten the clamping notch through the fastener, so that the thread between the locking nut plate and the adjusting sleeve is stuck and fixed, and then tighten the locking bolt to press the locking nut plate against the shell to achieve fixation.

[0008] Since the adjusting sleeve is slidably inserted into the axial hole of the shell, the adjusting sleeve can move any distance in the axial hole, that is, the adjustment of the spacing size is stepless, and the adjustment of any spacing size can be achieved. After the adjustment is completed, the thread between the locking nut plate and the adjusting sleeve can be in a stuck state through the cooperation of the fastener and the clamping notch, that is, the top of the thread on the locking nut plate is pressed against the bottom of the thread of the adjusting sleeve to form a stuck and fixed state. There is no normal thread matching relationship between the locking nut plate and the adjusting sleeve, and there is no gap between the two, and there will be no mutual movement. At the same time, since the locking nut plate is close to the shell, in the process of tightening the locking bolt to press the locking nut plate against the shell, there will be no tilting or displacement between the locking nut plate and the adjusting sleeve. The accuracy after adjustment is higher, thereby ensuring that the input shaft and the transmission wheel are always in a close fit state, there will be no gap, the adjustment accuracy is high, and the wear of the worm gear is reduced.

[0009] In the axial adjustment mechanism of the input shaft of the precision reducer, the locking nut disc is also provided with a buffer notch penetrating the inner ring of the locking nut disc, and the center line of the buffer notch and the center line of the clamping notch are located on the same diameter of the locking nut disc. The buffer notch is provided so that the locking nut disc is not prone to breakage during the process of tightening the clamping notch by the fastener, so that the clamping notch can be tightened to the maximum extent, so that the threads between the locking nut disc and the adjustment sleeve can be better locked and fixed, and it is ensured that there will be no tilt or displacement between the locking nut disc and the adjustment sleeve, and the accuracy after adjustment is higher, so as to ensure that the input shaft and the transmission wheel are always in a close fit state, there will be no gap, the adjustment accuracy is high, and the wear of the worm gear is reduced.

[0010] In the above-mentioned axial adjustment mechanism of the input shaft of the precision reducer, the buffer gap includes a circular gap and a strip gap distributed along the radial direction of the locking nut disk, the width of the strip gap is smaller than the diameter of the circular gap, one end of the strip gap is connected to the circular gap, and the other end penetrates the inner ring of the locking nut disk. Through the above-mentioned structural design, the buffer gap has a transitional role in the strip gap and a buffering role in the circular gap, making it easier to tighten the clamping gap, and the locking nut disk is not easy to break during the process of tightening the clamping gap by the fastener, so that the clamping gap can be tightened to the greatest extent, so that the thread between the locking nut disk and the adjustment sleeve can be better locked and fixed, ensuring that there will be no tilting or displacement between the locking nut disk and the adjustment sleeve, and the accuracy after adjustment is higher, thereby ensuring that the input shaft and the transmission wheel are always in a close fit state, there will be no gap, the adjustment accuracy is high, and the wear of the worm gear is reduced.

[0011] In the axial adjustment mechanism of the input shaft of the precision reducer, the fastener is a fastening bolt, a through hole is provided on one side wall of the clamping notch, and a threaded hole opposite to the through hole is provided on the other side wall, the screw portion of the fastening bolt passes through the through hole and is threadedly connected in the threaded hole, and the head of the fastening bolt abuts against the edge of the through hole. By turning the fastening bolt, the clamping notch can be tightened by the action of the thread, so that the thread between the locking nut plate and the adjustment sleeve is locked and fixed, ensuring that there will be no tilt or displacement between the locking nut plate and the adjustment sleeve, and the accuracy after adjustment is higher, thereby ensuring that the input shaft and the transmission wheel are always in a close fit state, there will be no gap, the adjustment accuracy is high, and the wear of the worm gear is reduced.

[0012] In the axial adjustment mechanism of the input shaft of the precision reducer, a recessed groove is provided on the locking nut disk, the through hole is connected to the bottom of the recessed groove, the head of the fastening bolt is embedded in the recessed groove and abuts against the bottom of the recessed groove, and the head of the fastening bolt is in planar contact with the bottom of the recessed groove. The head of the fastening bolt is embedded in the recessed groove and will not protrude from the surface of the tightening nut disk, and the overall aesthetics are good. At the same time, the head of the fastening bolt is in planar contact with the bottom of the recessed groove, so that after the clamping notch is tightened by the action of the fastening bolt, the stability is good, so that the thread between the locking nut disk and the adjustment sleeve can be stably fixed, ensuring that there will be no tilting or displacement between the locking nut disk and the adjustment sleeve, and the accuracy after adjustment is higher, thereby ensuring that the input shaft and the transmission wheel are always in a close fit state, there will be no gap, the adjustment accuracy is high, and the wear of the worm gear is reduced.

[0013] In the above-mentioned axial adjustment mechanism of the input shaft of the precision reducer, the side wall of the recessed groove is an arc wall, which matches the contour of the head of the fastening bolt, has better fit and is convenient for the tightening operation of the fastening bolt.

[0014] In the above-mentioned axial adjustment mechanism of the input shaft of the precision reducer, the head of the fastening bolt also has a force groove for a tool to penetrate and twist. The force groove provides a force point for the tool to penetrate, so as to facilitate twisting the fastening bolt to tighten the clamping notch. Preferably, the force groove is a regular hexagonal opening groove.

[0015] In the axial adjustment mechanism of the input shaft of the precision reducer, the fasteners are a fastening bolt and a fastening nut. The two side walls of the clamping notch are provided with connecting holes. The screw portion of the fastening bolt passes through the two connecting holes and is threadedly connected with the fastening nut. The head of the fastening bolt abuts against the edge of one of the connecting holes, and the fastening nut abuts against the edge of the other connecting hole. Through the cooperation of the fastening nut and the fastening bolt, the clamping notch can be tightened, so that the threads between the locking nut plate and the adjustment sleeve are locked and fixed, ensuring that there is no tilt or displacement between the locking nut plate and the adjustment sleeve. The adjusted accuracy is higher, thereby ensuring that the input shaft and the transmission wheel are always in a close fit state without any gap, the adjustment accuracy is high, and the wear of the worm gear is reduced.

[0016] In the above-mentioned axial adjustment mechanism of the input shaft of the precision reducer, the adjustment sleeve is a straight sleeve, the locking nut disc is set outside the adjustment sleeve and is threadedly connected with the adjustment sleeve, the locking nut disc has a plurality of mounting holes, the plurality of mounting holes are evenly distributed on both sides of the clamping notch, the locking nut disc can be abutted against the housing and is in plane contact with the housing, the number of the locking bolts is consistent with the mounting holes and passes through the corresponding mounting holes one by one to press the locking nut disc on the housing. The design of the straight-cylindrical adjustment sleeve is coordinated with setting the pressing point of the locking bolt on the locking nut disc, the threads between the locking nut disc and the adjustment sleeve are fixed and become one body, and then tightened by the locking bolt, the locking nut disc and the housing can ensure the maximum contact area, so that the stability of the fixation after adjustment is better, and it is less likely to have any tilt and displacement, and the accuracy after adjustment is higher, so as to ensure that the input shaft and the transmission wheel are always in a close fit state, there is no gap, the adjustment accuracy is high, and the wear of the worm gear is reduced.

[0017] Compared with the prior art, the axial adjustment mechanism of the input shaft of the precision reducer has the following advantages:

[0018] 1. Through the cooperation of the fastener and the clamping notch, the threads between the locking nut plate and the adjusting sleeve can be stuck. At the same time, because the locking nut plate is close to the housing, when the locking bolt is tightened to press the locking nut plate against the housing, there will be no tilt or displacement between the locking nut plate and the adjusting sleeve. The accuracy after adjustment is higher, thereby ensuring that the input shaft and the transmission wheel are always in a close fit without any gap, the adjustment accuracy is high, and the wear of the worm gear is reduced.

[0019] 2. The strip notch acts as a transition, while the circular notch acts as a buffer, making the clamping notch easier to tighten. The locking nut plate is less likely to break during the process of tightening the clamping notch through the fastener, so that the clamping notch can be tightened to the greatest extent, and the threads between the locking nut plate and the adjusting sleeve can be better fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of the axial adjustment mechanism of the input shaft of the precision reducer in the first embodiment.

[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0022] Figure 3 It is a side view of the axial adjustment mechanism of the input shaft of the precision reducer in the first embodiment.

[0023] Figure 4 yes Figure 3 Cross-sectional view along the BB direction.

[0024] Figure 5 yes Figure 3 Cross-sectional view along CC direction.

[0025] Figure 6 It is a three-dimensional structural diagram of the locking nut plate.

[0026] Figure 7 It is a three-dimensional structural diagram of the adjustment sleeve.

[0027] Figure 8 It is a structural schematic diagram of the axial adjustment mechanism of the input shaft of the precision reducer in the second embodiment.

[0028] In the figure, 1, housing; 1a, shaft hole; 2, input shaft; 3, driving wheel; 4, locking bolt; 5, locking nut plate; 5a, clamping notch; 5b, circular notch; 5c, strip notch; 5d, through hole; 5e, threaded hole; 5f, recessed groove; 5g, mounting hole; 6, adjusting sleeve; 7, fastening bolt; 7a, force groove; 8, fastening nut. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] Embodiment 1

[0031] like Figure 1-5 As shown, the angular precision reducer includes a housing 1 having an axial hole 1 a , an input shaft 2 and a transmission wheel 3 both disposed in the housing 1 , wherein the input shaft 2 passes through the axial hole 1 a and meshes with the transmission wheel 3 .

[0032] The axial adjustment mechanism of the input shaft includes a locking bolt 4, an annular locking nut plate 5 and an adjustment sleeve 6 with one end slidingly inserted into the shaft hole 1a. One end of the input shaft 2 is axially fixed in the adjustment sleeve 6 through a tapered roller bearing, and the other end is slidably connected in the shaft hole 1a through a ball bearing.

[0033] like Figure 1 and 7 As shown, the adjusting sleeve 6 is a straight sleeve, and the locking nut plate 5 is sleeved outside the adjusting sleeve 6 and is threadedly connected to the adjusting sleeve 6 .

[0034] like Figure 4 and 6 As shown, one side of the locking nut plate 5 has a clamping notch 5a that runs from the inner ring to the outer ring, and the locking nut plate 5 is also provided with a buffer notch that runs through the inner ring of the locking nut plate 5, and the center line of the buffer notch and the center line of the clamping notch 5a are located on the same diameter of the locking nut plate 5. The buffer notch includes a circular notch 5b and a strip notch 5c distributed along the radial direction of the locking nut plate 5, the width of the strip notch 5c is smaller than the diameter of the circular notch 5b, one end of the strip notch 5c is connected to the circular notch 5b, and the other end runs through the inner ring of the locking nut plate 5. The locking nut plate 5 is also connected with a fastener that can tighten the clamping notch 5a to lock the thread between the locking nut plate 5 and the adjusting sleeve 6.

[0035] Specifically, the fastener is a fastening bolt 7, and a through hole 5d is provided on one side wall of the clamping notch 5a, and a threaded hole 5e is provided on the other side wall opposite to the through hole 5d. A recess 5f is also provided on the locking nut plate 5, and the side wall of the recess 5f is an arc wall. The through hole 5d is connected to the bottom of the recess 5f, and the screw portion of the fastening bolt 7 passes through the through hole 5d and is threadedly connected in the threaded hole 5e, and the head of the fastening bolt 7 is embedded in the recess 5f and abuts against the bottom of the recess 5f, and the head of the fastening bolt 7 is in plane contact with the bottom of the recess 5f. The head of the fastening bolt 7 also has a force groove 7a for tools to penetrate and twist, providing a force point, so as to facilitate twisting the fastening bolt 7 to achieve tightening the clamping notch 5a. In this embodiment, the force groove 7a is a regular hexagonal opening groove.

[0036] The locking nut plate 5 has a plurality of mounting holes 5g, which are evenly distributed on both sides of the clamping notch 5a. The locking nut plate 5 can be abutted against the shell 1 and have a planar contact with the shell 1. The number of locking bolts 4 is consistent with the mounting holes 5g and they pass through the corresponding mounting holes 5g one by one to press the locking nut plate 5 onto the shell 1.

[0037] During installation and adjustment, the adjusting sleeve 6 is pushed to slide into the housing 1 and drive the input shaft 2 to move. Since the adjusting sleeve 6 is slidably inserted into the shaft hole 1a of the housing 1, the adjusting sleeve 6 can move any distance in the shaft hole 1a, that is, the adjustment of the spacing size is stepless, and any spacing size can be adjusted, so that the input shaft 2 and the transmission wheel 3 are connected through the meshing teeth with the smallest gap. Then rotate the locking nut plate 5, and the locking nut plate 5 moves inward relative to the adjusting sleeve 6 through the thread cooperation until it is close to the housing 1, and then tighten the clamping notch 5a by turning the fastening bolt 7 through the tool, so that the threads between the locking nut plate 5 and the adjusting sleeve 6 are stuck and fixed, so that there is no thread cooperation relationship between the locking nut plate 5 and the adjusting sleeve 6, and there is no gap between the two, and then tighten the locking bolt 4 to press the locking nut plate 5 against the housing 1 to fix it. In the process of tightening the locking bolt 4, there will be no tilting or displacement between the locking nut plate 5 and the adjusting sleeve 6. The accuracy after adjustment is higher, thereby ensuring that the input shaft 2 and the transmission wheel 3 are always in a close fit state without any gap, the adjustment accuracy is high, and the wear of the worm gear is reduced.

[0038] Embodiment 2

[0039] This embodiment is basically the same as the first embodiment, except that: Figure 8 As shown, the fasteners are a fastening bolt 7 and a fastening nut 8. Connection holes are provided on both side walls of the clamping notch 5a. The screw portion of the fastening bolt 7 passes through the two connection holes and is threadedly connected to the fastening nut 8. The head of the fastening bolt 7 abuts against the edge of one of the connection holes, and the fastening nut 8 abuts against the edge of the other connection hole. Through the cooperation of the fastening nut 8 and the fastening bolt 7, the clamping notch 5a can be tightened, so that the threads between the locking nut plate 5 and the adjusting sleeve 6 are locked and fixed, ensuring that there will be no tilt or displacement between the locking nut plate 5 and the adjusting sleeve 6. The adjusted accuracy is higher, thereby ensuring that the input shaft 2 and the transmission wheel 3 are always in a close fit state without any gap, with high adjustment accuracy and reduced wear of the worm gear.

[0040] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An axial adjustment mechanism for an input shaft of a precision reducer, the precision reducer comprising a housing (1) having an axial hole (1a), an input shaft (2) and a transmission wheel (3) both arranged in the housing (1), the axial adjustment mechanism for the input shaft comprising a locking bolt (4), an annular locking nut plate (5) and an adjustment sleeve (6) with one end slidingly inserted into the axial hole (1a), one end of the input shaft (2) being axially fixed in the adjustment sleeve (6), the locking nut plate (5) being sleeved outside the adjustment sleeve (6) and being threadedly connected to the adjustment sleeve (6), characterized in that: The outer wall of the adjusting sleeve (6) is in contact with the inner wall of the shaft hole (1a); the locking nut plate (5) is flat and located outside the housing (1); one side of the locking nut plate (5) has a clamping notch (5a) extending radially from the inner ring to the outer ring; the clamping notch (5a) extends axially through both end surfaces of the locking nut plate (5); the locking nut plate (5) is also connected to a fastener capable of tightening the clamping notch (5a) to lock the threads between the locking nut plate (5) and the adjusting sleeve (6); the locking nut plate (5) is pressed against the housing (1) by a locking bolt (4).

2. The axial adjustment mechanism of the precision reducer input shaft according to claim 1, characterized in that: The locking nut plate (5) is also provided with a buffer notch penetrating the inner ring of the locking nut plate (5), and the center line of the buffer notch and the center line of the clamping notch (5a) are located on the same diameter of the locking nut plate (5).

3. The axial adjustment mechanism of the precision reducer input shaft according to claim 2, characterized in that: The buffer notch comprises a circular notch (5b) and a strip notch (5c) distributed radially along the locking nut plate (5); the width of the strip notch (5c) is smaller than the diameter of the circular notch (5b); one end of the strip notch (5c) is connected to the circular notch (5b) and the other end passes through the inner ring of the locking nut plate (5).

4. The axial adjustment mechanism of the precision reducer input shaft according to claim 1, 2 or 3, characterized in that: The fastener is a fastening bolt (7), a through hole (5d) is provided on one side wall of the clamping notch (5a), and a threaded hole (5e) opposite to the through hole (5d) is provided on the other side wall, the screw portion of the fastening bolt (7) passes through the through hole (5d) and is threadedly connected in the threaded hole (5e), ​​and the head of the fastening bolt (7) abuts against the edge of the through hole (5d).

5. The axial adjustment mechanism of the precision reducer input shaft according to claim 4, characterized in that: The locking nut plate (5) is also provided with a clearance groove (5f), the through hole (5d) is connected to the bottom of the clearance groove (5f), the head of the fastening bolt (7) is embedded in the clearance groove (5f) and abuts against the bottom of the clearance groove (5f), and there is planar contact between the head of the fastening bolt (7) and the bottom of the clearance groove (5f).

6. The axial adjustment mechanism of the precision reducer input shaft according to claim 5, characterized in that: The side wall of the clearance trough (5f) is an arc-shaped wall.

7. The axial adjustment mechanism of the precision reducer input shaft according to claim 4, characterized in that: The head of the fastening bolt (7) also has a force groove (7a) for a tool to be inserted and screwed.

8. The axial adjustment mechanism of the input shaft of the precision reducer according to claim 1, 2 or 3, characterized in that: The fasteners are a fastening bolt (7) and a fastening nut (8), and connecting holes are provided on both side walls of the clamping notch (5a). The screw portion of the fastening bolt (7) passes through the two connecting holes and is threadedly connected to the fastening nut (8). The head of the fastening bolt (7) abuts against the edge of one of the connecting holes, and the fastening nut (8) abuts against the edge of the other connecting hole.

9. The axial adjustment mechanism of the precision reducer input shaft according to claim 4, characterized in that: The adjusting sleeve (6) is a straight sleeve, the locking nut plate (5) is sleeved outside the adjusting sleeve (6) and is threadedly connected to the adjusting sleeve (6), the locking nut plate (5) has a plurality of mounting holes (5g), the plurality of mounting holes (5g) are evenly distributed on both sides of the clamping notch (5a), the locking nut plate (5) can be abutted against the housing (1) and is in planar contact with the housing (1), the number of the locking bolts (4) is consistent with the number of the mounting holes (5g), and the locking bolts (4) are passed through the corresponding mounting holes (5g) one by one to press the locking nut plate (5) onto the housing (1).

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