A clearance adaptive adjustment mechanism for suppressing bevel gear tooth surface reversing gear knocking

Abstract

The present invention specifically relates to a self-adaptive clearance adjustment mechanism for suppressing gear knocking during bevel gear tooth flank reversal. The mechanism comprises a driving bevel gear shaft, a driven bevel gear, and a differential gear housing. The driving bevel gear shaft and the driven bevel gear achieve mechanical transmission through gear meshing. The driven bevel gear is mounted on the differential gear housing. A movable tooth side clearance adjustment ring in the driven bevel gear is provided with a circle of through holes. A fixed tooth side clearance adjustment ring in the differential gear housing is provided with a circle of spiral beveled slots. A force transmission pin extends through the through holes and the spiral beveled slots. A clearance elimination spring is provided between the force transmission pin and the fixed tooth side clearance adjustment ring's limiting spring surface. Snap rings are provided at both ends of the force transmission pin. This mechanism can self-adaptively adjust tooth side clearance during forward and reverse, and forward and reverse torque switching power transmission processes, suppressing gear knocking and impact caused by tooth flank reversal, and preventing meshing failures such as jamming.

Description

Technical Field

[0001] The invention relates to the technical field of gear clearance adjustment, and in particular to a clearance adaptive adjustment mechanism for suppressing bevel gear tooth surface reversing gear knocking. Background Art

[0002] The bevel gear tooth side clearance adjustment mechanism used in production lines and industrial products is generally unable to complete the adaptive adjustment of the tooth side clearance during operation after the tooth side clearance is set. Especially during repeated reversing transmission, problems such as torque shock and gear knocking may occur due to overcoming the circumferential tooth side clearance. For the bevel gear tooth side clearance adjustment mechanism that needs to adaptively adjust the torque according to the load demand during operation to improve the setting performance, there are problems such as complex design and great production difficulty due to the improvement of force. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the bevel gear tooth side clearance adjustment mechanism in the prior art cannot complete the adaptive adjustment of the tooth side clearance during operation, thereby providing a clearance adaptive adjustment mechanism that suppresses the knocking of the bevel gear tooth surface reversing gear.

[0004] A clearance adaptive adjustment mechanism for suppressing bevel gear tooth surface reversing gear knocking comprises a driving bevel gear shaft, a driven bevel gear and a differential gear housing;

[0005] The driving bevel gear shaft and the driven bevel gear are engaged with each other to realize mechanical transmission, and the driven bevel gear is sleeved on the differential gear housing;

[0006] A circle of through holes is provided on the movable tooth side clearance adjustment ring in the driven bevel gear, a circle of spiral bevel groove holes is provided on the fixed tooth side clearance adjustment ring in the differential gear housing, a force transmission pin passes through the through holes and the spiral bevel groove holes, a gap eliminating spring is provided between the force transmission pin and the fixed tooth side clearance adjustment ring limit spring surface on the fixed tooth side clearance adjustment ring, and retaining rings are provided at both ends of the force transmission pin.

[0007] Furthermore, the driven bevel gear further comprises a bevel gear body, the bevel gear body and the driving bevel gear shaft are engaged with each other through gears to achieve mechanical transmission, and the bevel gear body is fixedly connected to the movable tooth side clearance adjustment ring.

[0008] Furthermore, the differential gear housing further includes a differential gear case, the fixed tooth side clearance adjustment ring is sleeved on the differential gear case, and the fixed tooth side clearance adjustment ring is fixedly connected to the differential gear case.

[0009] Furthermore, an annular groove is provided on the fixed tooth side clearance adjustment ring, and the movable tooth side clearance adjustment ring is placed in the annular groove.

[0010] Furthermore, the number of the through holes, the number of the spiral beveled slot holes and the number of the force transmission pins are the same, and the through holes are evenly distributed on the movable tooth side clearance adjustment ring, and the spiral beveled slot holes are evenly distributed on the fixed tooth side clearance adjustment ring.

[0011] Furthermore, the diameters of the through hole, the spiral bevel hole and the force transmission pin are the same.

[0012] Furthermore, a snap ring fixing groove is provided at both ends of the force transmission pin, and the snap ring is embedded in the snap ring fixing groove at both ends of the force transmission pin.

[0013] Furthermore, a circle of pressure balancing holes is provided on the fixed tooth side clearance adjustment ring.

[0014] Furthermore, the active conical tooth surface and the conical tooth surface form a tooth side clearance X. The tooth side clearance adjustment range X0 is determined by the distance between the movable tooth side clearance adjustment ring limit surface, the differential gear case limit surface, the back of the bevel gear and the fixed tooth side clearance adjustment ring limit surface. In order to prevent the clearance from eliminating the spring limit compression transmission torque, the following requirements must be met:

[0015] L 间隙消除弹簧极限压缩长度 sin(β)≥X0

[0016] X 2.1a～6.4c =X 6.1a～2.2b

[0017] Where β is the helix angle of the spiral bevel groove hole, X0≥0, when the tooth side clearance X is reduced to 0, the force transmission pin does not contact the limit small clearance limit surface.

[0018] The present invention also includes a main reducer, which includes the clearance adaptive adjustment mechanism for suppressing the knocking of the bevel gear tooth surface and the reversing gear as described in any of the above items, and the assembled assembly of the driving bevel gear shaft, the driven bevel gear and the differential gear housing is constrained inside the main reducer housing by bearings.

[0019] The present invention solves the problem of tooth surface flipping caused by the radial component of the tooth surface force during bevel gear transmission, can realize adaptive adjustment of the tooth side clearance under different working loads, and at the same time meets the positive demand for tooth side clearance caused by thermal expansion of the gear teeth and the demand for suppression of tooth side clearance caused by tooth surface reversal. Compared with the traditional bevel gear main reducer (which does not have the tooth side clearance adjustment function), the number of parts added is relatively small and there is no complicated process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 This is an exploded view of the tooth side clearance adaptive compensation mechanism of the present invention;

[0023] Figure 3 It is a schematic diagram of the assembled whole of the present invention;

[0024] Figure 4 This is a diagram of the tooth side clearance of the present invention;

[0025] Figure 5 This is a diagram showing the adjustment range of the tooth side clearance of the present invention;

[0026] Description of reference numerals:

[0027] 1—driving bevel gear shaft, 1a—driving bevel tooth surface, 2—driven bevel gear, 2.1—bevel gear body, 2.1a—bevel gear back, 2.1b—conical tooth surface, 2.2—moving tooth side clearance adjustment ring, 2.2a—moving tooth side clearance adjustment ring pin hole, 2.2b—moving tooth side clearance adjustment ring limit, 3—retaining ring, 4—clearance elimination spring, 4a—clearance elimination spring bottom, 4b—clearance adjustment spring top, 5—force transmission pin, 6—differential gear housing, 6.1—differential gear housing, 6.1a—differential gear housing limit surface, 6.2—fixed tooth side clearance adjustment ring, 6.2a—fixed tooth side clearance adjustment ring limit spring, 6.2b—limiting minimum clearance limit surface, 6.2c—spiral bevel slot hole, 6.3c—pressure balance hole, 6.4c—fixed tooth side clearance adjustment ring limit surface, DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] See also Figures 1 to 3 , a clearance adaptive adjustment mechanism for suppressing bevel gear tooth surface reversing gear knocking, comprising a driving bevel gear shaft 1, a driven bevel gear 2 and a differential gear housing 6;

[0033] The driving bevel gear shaft 1 and the driven bevel gear 2 are engaged with each other to realize mechanical transmission, and the driven bevel gear 2 is sleeved on the differential gear housing 6;

[0034] A circle of through holes is provided on the movable tooth side clearance adjustment ring 2.2 in the driven bevel gear 2, and a circle of spiral bevel groove holes 6.2c is provided on the fixed tooth side clearance adjustment ring 6.2 in the differential gear housing 6. The force transmission pin 5 passes through the through holes and the spiral bevel groove holes 6.2c. A gap elimination spring 4 is provided between the force transmission pin 5 and the fixed tooth side clearance adjustment ring limit spring surface 6.2a on the fixed tooth side clearance adjustment ring 6.2. Snap rings 3 are provided at both ends of the force transmission pin 5. The movable tooth side clearance adjustment ring 2.2, the fixed tooth side clearance adjustment ring 6.2, the force transmission pin 5 and the snap ring 3 together constitute a tooth side clearance adaptive compensation mechanism.

[0035] The driven bevel gear 2 further comprises a bevel gear body 2.1, which is engaged with the driving bevel gear shaft 1 through gears to achieve mechanical transmission, and the bevel gear body 2.1 is fixedly connected to the movable tooth side clearance adjustment ring 2.2.

[0036] The differential gear housing 6 further comprises a differential gear case 6.1, and the fixed tooth side clearance adjustment ring 6.2 is sleeved on the differential gear case 6.1, and the fixed tooth side clearance adjustment ring 6.2 is fixedly connected to the differential gear case 6.1.

[0037] The fixed tooth side clearance adjustment ring 6.2 is provided with an annular groove, and the movable tooth side clearance adjustment ring 2.2 is placed in the annular groove.

[0038] The number of the through holes, the number of the spiral beveled slot holes 6.2c and the number of the force transmission pins 5 are the same, and the through holes are evenly distributed on the movable tooth side clearance adjustment ring 2.2, and the spiral beveled slot holes 6.2c are evenly distributed on the fixed tooth side clearance adjustment ring 6.2.

[0039] The diameters of the through hole, the spiral bevel hole 6.2c and the force transmission pin 5 are the same.

[0040] The two ends of the force transmission pin 5 are provided with a snap ring fixing groove, and the snap ring 3 is embedded in the snap ring fixing groove at both ends of the force transmission pin 5 to limit the force transmission pin 5 from moving along the radial direction of the gear.

[0041] The fixed tooth side clearance adjustment ring 6.2 is also provided with a circle of pressure balancing holes 6.3c for balancing the pressure inside and outside the sealing cavity formed by the movable tooth side clearance adjustment ring 2.2 and the fixed tooth side clearance adjustment ring 6.2.

[0042] See also Figure 4 and Figure 5 The active conical tooth surface 1a and the conical tooth surface 2.1b form a tooth side clearance X. The tooth side clearance adjustment range X0 is determined by the distance between the movable tooth side clearance adjustment ring limit surface 2.2b, the differential gear case limit surface 6.1a, the bevel gear back surface 2.1a and the fixed tooth side clearance adjustment ring limit surface 6.4c. To prevent the clearance from being eliminated and the spring 4 from being compressed to transmit torque, the following requirements must be met:

[0043] L 间隙消除弹簧极限压缩长度 sin(β)≥X0

[0044] X 2.1a～6.4c =X 6.1a～2.2b

[0045] Where β is the helix angle of the helical slot hole 6.2c, X0≥0, when the tooth side clearance X is reduced to 0, the force transmission pin (5) does not contact the limit small clearance limit surface (6.2b);

[0046] The design value of the helix angle β of the spiral bevel hole 6.2c is limited by factors such as transmission efficiency and layout space. Since the force transmission pin 5 moves on its working surface driven by torque, self-locking will not occur.

[0047] The bevel gear body 2.1 and the movable tooth side clearance adjustment ring 2.2 can be processed in two ways: one-piece processing and one-piece processing.

[0048] The differential gear housing 6.1 and the fixed tooth side clearance adjustment ring 6.2 can be processed in two ways: one-piece processing and one-piece processing.

[0049] The adaptive clearance adjustment mechanism for suppressing the knocking of the bevel gear tooth surface reversing gear can realize the forward and reverse transmission of torque. The power transmission path is the rotational motion of the active bevel gear shaft 1, which transmits the torque to the driven bevel gear 2 through the tooth surface. The pin hole 2.2a of the mobile tooth side clearance adjustment ring set on the mobile tooth side clearance adjustment ring 2.2 transmits the force to the force transmission pin 5, and the force transmission pin 5 transmits the force to the spiral bevel groove hole 6.2c on the fixed tooth side clearance adjustment ring 6.2, forming a torque transmission to the assembly assembled by the driven bevel gear 2 and the differential gear housing 6, thereby completing the power transmission.

[0050] In the torque transmission direction, where the tooth side clearance increases, the driven bevel gear 2 tends to approach the differential gear case limit surface 6.1a. At this time, the force transmission pin 5 compresses the clearance-eliminating spring 5 along the spiral groove 6.2c. The degree of compression of the clearance-eliminating spring 5 is related to the magnitude of the transmitted torque. As the transmitted torque increases, the degree of compression of the clearance-eliminating spring 5 increases, and the tooth side clearance increases. As the transmitted torque decreases, the degree of compression of the clearance-eliminating spring 5 decreases, and the tooth side clearance decreases. In high-torque (high-load) operating conditions, increasing the tooth side clearance can prevent meshing failures such as seizure caused by heating and expansion of the gear teeth. In low-torque (low-load) operating conditions, reducing the tooth side clearance can prevent gear knocking and impact caused by tooth flank reversal.

[0051] In the torque transmission direction, where the backlash decreases, driven bevel gear 2 tends to move away from differential gear case limit surface 6.1a. At this point, force transfer pin 5 releases backlash-eliminating spring 5 along spiral groove 6.2c. As the transmitted torque increases, the backlash between tooth flank 1a and tooth flank 2.1b decreases. Any resulting heat expansion of the gear teeth compresses backlash-eliminating spring 5, preventing failure.

[0052] The adaptive clearance adjustment mechanism for suppressing gear knocking caused by tooth surface reversal of bevel gears can adaptively adjust the tooth side clearance during the forward and reverse, and forward and reverse torque switching power transmission process, thereby suppressing gear knocking and impact caused by tooth surface reversal and avoiding meshing failures such as jamming.

[0053] The present invention also includes a final reducer, which includes the clearance adaptive adjustment mechanism for suppressing the knocking of the bevel gear tooth surface reversing gear as described in any of the above items, and the assembled assembly of the driving bevel gear shaft 1, the driven bevel gear 2 and the differential gear housing 6 is constrained inside the final reducer housing by bearings.

[0054] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A clearance adaptive adjustment mechanism for suppressing bevel gear tooth surface reversing gear knocking, characterized in that: It comprises a driving bevel gear shaft (1), a driven bevel gear (2) and a differential gear housing (6); The driving bevel gear shaft (1) and the driven bevel gear (2) are engaged with each other to realize mechanical transmission, and the driven bevel gear (2) is sleeved on the differential gear housing (6); A circle of through holes is provided on the movable tooth side clearance adjustment ring (2.2) in the driven bevel gear (2); a circle of spiral bevel slot holes (6.2c) is provided on the fixed tooth side clearance adjustment ring (6.2) in the differential gear housing (6); a force transmission pin (5) passes through the through holes and the spiral bevel slot holes (6.2c); a gap elimination spring (4) is provided between the force transmission pin (5) and the fixed tooth side clearance adjustment ring limiting spring surface (6.2a) on the fixed tooth side clearance adjustment ring (6.2); and snap rings (3) are provided at both ends of the force transmission pin (5); The driven bevel gear (2) further comprises a bevel gear body (2.1), wherein the bevel gear body (2.1) and the driving bevel gear shaft (1) are engaged with each other through gears to achieve mechanical transmission, and the bevel gear body (2.1) is fixedly connected to the movable tooth side clearance adjustment ring (2.2); The differential gear housing (6) further comprises a differential gear case (6.1), the fixed tooth side clearance adjustment ring (6.2) is sleeved on the differential gear case (6.1), and the fixed tooth side clearance adjustment ring (6.2) is fixedly connected to the differential gear case (6.1); The active conical tooth surface (1a) and the conical tooth surface (2.1b) form a tooth side clearance X. The tooth side clearance adjustment range X0 is determined by the distance between the movable tooth side clearance adjustment ring limit surface (2.2b), the differential gear case limit surface (6.1a), the back of the conical gear (2.1a) and the fixed tooth side clearance adjustment ring limit surface (6.4c). In order to prevent the clearance elimination spring (4) from transmitting torque due to extreme compression, the following requirements must be met: L 间隙消除弹簧极限压缩长度 ·sin(β)≥X0 X 2.1a～6.4c =X 6.1a～2.2b Where β is the helix angle of the helical slot hole (6.2c), X0≥0, when the tooth side clearance X is reduced to 0, the force transmission pin (5) does not contact the extreme small clearance limit surface (6.2b).

2. The gap adaptive adjustment mechanism according to claim 1, characterized in that: An annular groove is provided on the fixed tooth side clearance adjustment ring (6.2), and the movable tooth side clearance adjustment ring (2.2) is placed in the annular groove.

3. The gap adaptive adjustment mechanism according to claim 1, characterized in that: The number of the through holes, the number of the spiral beveled slot holes (6.2c) and the number of the force transmission pins (5) are the same, and the through holes are evenly distributed on the movable tooth side clearance adjustment ring (2.2), and the spiral beveled slot holes (6.2c) are evenly distributed on the fixed tooth side clearance adjustment ring (6.2).

4. The gap adaptive adjustment mechanism according to claim 3, characterized in that: The diameters of the through hole, the spiral bevel hole (6.2c) and the force transmission pin (5) are the same.

5. The gap adaptive adjustment mechanism according to claim 1, characterized in that: Snap ring fixing grooves are provided at both ends of the force transmission pin (5), and the snap ring (3) is embedded in the snap ring fixing grooves at both ends of the force transmission pin (5).

6. The gap adaptive adjustment mechanism according to claim 1, characterized in that: The fixed tooth side clearance adjustment ring (6.2) is also provided with a circle of pressure balance holes (6.3c).

7. A main reducer, characterized in that The main reducer includes a clearance adaptive adjustment mechanism for suppressing bevel gear tooth surface reversing gear knocking as described in any one of claims 1 to 6, and the assembled assembly of the driving bevel gear shaft (1), the driven bevel gear (2) and the differential gear housing (6) is constrained inside the main reducer housing by bearings.

Images