Gear transmission device capable of reducing backlash

Abstract

The utility model discloses a gear transmission device capable of reducing backlash, which comprises a box body, a box cover, a motor main body, an axial adjusting piece, a transmission assembly and an output shaft, the box cover is fixedly arranged on the box body in a covering manner, a through hole is formed in the surface of the box cover, a bevel gear is integrally processed and formed on a rotating shaft of the motor main body, and the bevel gear penetrates into the box body from the through hole; the transmission assembly comprises a transmission shaft, a conical tooth piece and a first tooth piece, the conical tooth piece and the first tooth piece are arranged on the transmission shaft, the transmission shaft is rotationally arranged in the box body and is parallel to the rotating shaft, and the conical tooth piece is meshed with the conical gear; the axial adjusting piece is arranged in the box body and located at the end of the transmission shaft, the axial adjusting piece comprises an elastic piece, and the elastic piece abuts against the end of the transmission shaft; the output shaft is provided with a second tooth piece, and the second tooth piece is meshed with the first tooth piece. The gear transmission device has the advantages that the axial adjusting piece can automatically adjust the axial position of the transmission shaft, so that the backlash in the gear transmission device is reduced, and the meshing precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear drive technical field especially relates to a gear drive device that can reduce side gap. BACKGROUND

[0002] Gear plays an outstanding role in the development of industry, and it is of great significance to improve the precision of gear drive. Among them, reducing the side gap of gear drive is the key to improving the precision of gear drive. The side gap of gear drive refers to the gap of a pair of meshing gears on the reference circumference, which affects the precision, stability and life of gear drive. If the side gap is too large, it will lead to a decrease in transmission accuracy, increase in noise and vibration, and even accelerate the wear of gears, shorten the service life. On the contrary, appropriate side gap can ensure smooth entry and exit of gears during meshing, and reduce the unstable transmission phenomenon caused by no gap.

[0003] The usual method to reduce the side gap is to use a small tooth thickness reduction gear, that is, when making the gear, the tooth thickness reduction is controlled to be smaller than the standard gear, and then the gears are meshed at the normal center distance, so that a smaller side gap can be obtained. However, this method requires improving the manufacturing precision of gears, shafts and reduction boxes, otherwise it is easy to cause transmission jamming.

[0004] Referring to patent CN203146762U, the existing gear drive device includes a box body, an input shaft gear, a transmission shaft gear and an output shaft gear arranged in the box body for cooperation and transmission; a transmission bearing is arranged at the input end of the transmission shaft on one side of the transmission shaft gear, and a bearing cover is arranged on the box body outside the transmission bearing; an adjusting gasket is arranged between the bearing cover and the transmission bearing, and the relative meshing gap of the transmission shaft gear with the input shaft gear and the output shaft gear is adjusted by the adjusting gasket.

[0005] In the existing gear drive device, different thickness adjusting gaskets are replaced between the bearing cover and the transmission bearing, so that the transmission shaft gear is formed with high-precision meshing with the input shaft gear and the output shaft gear. In the existing gear drive device, the method for reducing the side gap of gear drive is very inconvenient, and the side gap of gear drive cannot be reduced in time, which needs to be improved. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a gear drive device to solve the problem of large side gap of the existing gear drive mechanism.

[0007] In order to achieve the above technical problems, the utility model provides a gear transmission device that can reduce side gap, including box, box cover, motor main part, axial adjusting part, transmission assembly and output shaft, the box cover fixed installation cover is established in the box, the surface of box cover is equipped with the perforation, the motor main part fixed installation is established in the box cover, the shaft of motor main part is integrally processed and is formed with bevel gear, and from the perforation place is worn into the box, transmission assembly includes transmission shaft and sets up the bevel gear and first tooth piece on transmission shaft, transmission shaft rotation is arranged in the box, and with the shaft is parallel, the bevel gear is engaged with bevel gear, axial adjusting part sets up in the box and is located transmission shaft's end, axial adjusting part includes elastic part, and the elastic part is pressed to transmission shaft's end, output shaft rotation is arranged on the box, output shaft is equipped with second tooth piece, and second tooth piece is engaged with first tooth piece.

[0008] Preferably, the both ends of the transmission shaft are respectively axially fixedly provided with first bearings and second bearings, the elastic part is a wave spring, the end wall in the box is provided with a first mounting groove, the wave spring is axially arranged in the first mounting groove, and the surface of the box cover is provided with a second mounting groove; the first bearing is slidingly arranged in the first mounting groove and abuts against the wave spring, and the second bearing is slidingly arranged in the second mounting groove.

[0009] Preferably, the axial adjusting part further comprises an adjusting nut, the surface of the box is provided with an adjusting screw hole, the adjusting screw hole is in communication with the first mounting groove, the adjusting nut is threadedly connected in the adjusting screw hole, and the both ends of the wave spring respectively abut against the adjusting nut and the first bearing.

[0010] Preferably, a third bearing is arranged between the output shaft and the box, and a fourth bearing is arranged between the end of the output shaft and the box cover.

[0011] Preferably, the bevel gear and the first tooth piece are respectively fixed between the transmission shaft and the output shaft by means of cementing, and the second tooth piece is fixed between the output shaft and the output shaft by means of cementing.

[0012] Preferably, a skeleton oil seal is arranged between the shaft and the motor main part and between the output shaft and the box.

[0013] Preferably, the both end faces of the box cover are provided with first sealing grooves, the surface of the box cover is provided with a second sealing groove along the circumferential side of the perforation, and sealing rings are arranged in the first sealing grooves and the second sealing groove.

[0014] Preferably, the sealing ring is made of rubber material.

[0015] From the above description of the utility model, the utility model has the following beneficial effects:

[0016] 1. This utility model uses a bevel gear and a bevel gear plate to mesh. When the bevel gear plate or bevel gear experiences slight wear, resulting in increased backlash, the transmission shaft can automatically move axially under the action of the elastic element of the axial adjustment component, thereby achieving the purpose of adjusting and compensating for the backlash.

[0017] 2. The elastic element uses wave springs, which have greater stiffness and stronger damping and vibration absorption capacity than conventional springs under the same conditions.

[0018] 2. When the bevel gear or bevel tooth plate is severely worn, or the wave spring ages and its elasticity decreases, the adjusting nut in the adjusting screw hole can be rotated to compress the wave spring and restore its elasticity. This allows the bevel gear plate and bevel gear to maintain low backlash and high meshing accuracy. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of a gear transmission device that can reduce backlash, according to an embodiment.

[0020] Figure 2 This is a cross-sectional view of the motor body, transmission assembly, and axial adjustment component in the embodiment.

[0021] Figure 3 This is a cross-sectional view of the enclosure and lid of the embodiment.

[0022] Figure 4 This is a schematic diagram of the structure of the first and second sealing grooves in the embodiment.

[0023] Reference numerals: 1. Housing; 11. First mounting slot; 12. Adjusting screw hole; 13. Adjusting nut; 2. Housing cover; 21. Through hole; 22. Second mounting slot; 23. First sealing slot; 24. Second sealing slot; 3. Motor body; 31. Rotating shaft; 32. Bevel gear; 4. Axial adjustment component; 41. Elastic component; 5. Transmission assembly; 51. Transmission shaft; 52. Bevel gear; 53. First gear; 54. First bearing; 55. Second bearing; 6. Output shaft; 61. Second gear; 62. Third bearing; 63. Fourth bearing; 7. Sealing ring; 8. Oil seal. Detailed Implementation

[0024] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer and more understandable, the following description is provided in conjunction with the appendix. Figures 1-4 The present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0025] Reference Figure 1The utility model provides a gear transmission device that can reduce side gap, which comprises a box body 1, a box cover 2, a motor body 3, an axial adjusting part 4, a transmission assembly 5 and an output shaft 6, wherein the axial adjusting part 4 and the transmission assembly 5 are arranged in the box body 1, and the box cover 2 is fixedly arranged on the box body 1. A through hole 21 is formed on the surface of the box cover 2, the motor body 3 is fixedly arranged on the box cover 2, the rotating shaft 31 of the motor body 3 passes through the through hole 21 on the surface of the box cover 2 and enters the box body 1, and a conical gear 32 is integrally formed on the rotating shaft 31 of the motor body 3. The conical gear 32 is a continuously displaced conical gear, and the tooth shape and the thickness continuously change.

[0026] With reference to Figure 2 And Figure 3 The transmission assembly 5 comprises a transmission shaft 51, a conical gear piece 52 and a first gear piece 53, the conical gear piece 52 and the first gear piece 53 are fixedly arranged on the transmission shaft 51, the transmission shaft 51 is rotatably arranged in the box body 1, the transmission shaft 51 is parallel to the rotating shaft 31 of the motor body 3, and the conical gear piece 52 is engaged with the conical gear 32. The axial adjusting part 4 comprises an elastic part 41, the elastic part 41 is arranged in the form of a wave spring, a first mounting groove 11 is formed on the end wall in the box body 1, a second mounting groove 22 is formed on the bottom surface of the box cover 2, and the wave spring is arranged in the first mounting groove 11 in the axial direction. The first bearing 54 and the second bearing 55 are fixedly arranged at the two ends of the transmission shaft 51, the first bearing 54 is slidingly mounted in the first mounting groove 11 and abuts against the wave spring, and the second bearing 55 is slidingly mounted in the second mounting groove 22. When the transmission shaft 51 moves in the axial direction, the thickness of the teeth engaged between the conical gear 32 and the conical gear piece 52 changes, so that the side gap is adjusted. The arrangement of the wave spring compensates for the axial direction of the transmission shaft 51, and when the conical gear piece 52 or the conical gear 32 is slightly worn, the conical gear piece 52 and the conical gear 32 can still maintain low side gap and high engagement precision under the elastic force of the wave spring.

[0027] When the conical toothed piece 52 or the conical gear 32 is seriously worn, or the wave spring is aged and the elastic force is reduced, the conical toothed piece 52 cannot be precisely engaged with the conical gear 32. In order to further facilitate the axial position adjustment of the transmission shaft 51, and to improve the engagement precision between the conical toothed piece 52 and the conical gear 32, the axial adjusting member 4 further comprises an adjusting nut 13. A corresponding adjusting screw hole 12 is formed on the surface of the box body 1, the adjusting screw hole 12 is communicated with the first mounting groove 11, the adjusting nut 13 is threadedly connected in the adjusting screw hole 12, and the adjusting nut 13 is abutted against the end of the wave spring away from the first bearing 54. By rotating the adjusting nut 13, the wave spring is compressed, so that the wave spring can further push the conical toothed piece 52 on the transmission shaft 51 to move axially to the right, so as to reduce the side clearance with the conical gear 32.

[0028] The output shaft 6 is rotatably arranged on the box body 1, and the output shaft 6 is parallel to the transmission shaft 51. A third bearing 62 is arranged between the output shaft 6 and the box body 1, and a fourth bearing 63 is arranged between the end of the output shaft 6 and the box cover 2. The third bearing 62 and the fourth bearing 63 improve the rotation efficiency of the output shaft 6. A second toothed piece 61 is fixedly arranged on the output shaft 6, and the second toothed piece 61 is engaged with the first toothed piece 53 on the transmission shaft 51. Thus, when the transmission shaft 51 is rotated by the rotating shaft 31 of the motor body 3, the output shaft 6 is also rotated by the transmission shaft 51. In addition, the transmission shaft 51 and the conical toothed piece 52, and the output shaft 6 and the second toothed piece 61 are fixed by gluing, so as to ensure that there is no rotation gap between the conical toothed piece 52 and the transmission shaft 51, and between the second toothed piece 61 and the output shaft 6.

[0029] With reference to Figure 1 , Figure 3 and Figure 4 , in order to improve the sealing performance between the motor body 3 and the box cover 2, and between the box cover 2 and the box body 1, so as to improve the sealing performance inside the gear transmission device, a first sealing groove 23 is formed on the two end surfaces of the box cover 2, a second sealing groove 24 is formed on the surface of the box cover 2, and a sealing ring 7 is arranged in the first sealing groove 23 and the second sealing groove 24. The sealing ring 7 blocks the gap between the box body 1 and the box cover 2, and between the box cover 2 and the motor body 3. The sealing ring 7 is made of rubber material, so as to have better sealing performance. The output shaft 6 is connected with the user's coupling, chain wheel, gear and other components after extending out of the box body 1. In order to further improve the sealing performance inside the gear transmission device, a skeleton oil seal 8 is arranged between the output shaft 6 and the box body 1, so as to prevent the oil inside the transmission device from leaking out. In order to prevent the oil inside the transmission device from entering the motor body 3, a skeleton oil seal 8 is arranged between the rotating shaft 31 and the motor body 3.

[0030] The specific implementation principle of the embodiment of the present application is that when the gear transmission device needs to be used, the output shaft 6 of the gear transmission device is connected with the coupling, sprocket or gear of the external environment. The rotating shaft 31 of the motor body 3 rotates to rotate the bevel gear 32. Since the bevel gear 32 is engaged with the bevel gear tooth 52, and the first gear tooth 53 is engaged with the second gear tooth 61, the bevel gear 32 drives the transmission shaft 51 to rotate, and the first gear tooth 53 drives the output shaft 6 to rotate.

[0031] When the bevel gear tooth 52 or the bevel gear 32 is slightly worn, the transmission shaft 51 can automatically move axially to the right under the action of the wave spring, so that the tooth thickness of the position where the bevel gear 32 is engaged with the bevel gear tooth 52 changes, thereby achieving the purpose of adjusting the side gap. When the bevel gear tooth 52 or the bevel gear 32 is severely worn, or the wave spring is aged and the elastic force decreases, which is not enough to push the bevel gear tooth 52 and the bevel gear 32 to be precisely engaged. The adjusting nut 13 can be rotated to compress the wave spring, so that the wave spring can further push the transmission shaft 51 to move axially to the right, thereby achieving the purpose of adjusting the side gap. The utility model realizes axial compensation by arranging the axial adjusting part 4, so that the bevel gear tooth 52 and the bevel gear 32 can maintain low side gap and high engagement precision.

[0032] The utility model has been described above in conjunction with the drawings, and obviously the specific implementation of the utility model is not limited by the above-mentioned mode. As long as various non-essential improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model is directly applied to other occasions without improvement, they are all within the protection of the utility model.

Claims

1. A gear transmission arrangement in which the backlash can be reduced, characterised in that: Including box, box cover, motor main body, axial adjusting part, transmission assembly and output shaft, the box cover is fixedly installed cover is arranged on the box, the surface of the box cover is provided with a through hole, the motor main body is fixedly installed on the box cover, the shaft of the motor main body is integrally processed with bevel gear, and from the through hole into the box; The transmission assembly includes a transmission shaft, a bevel gear, and a first tooth piece arranged on the transmission shaft, the transmission shaft is rotatably arranged in the box, and is parallel to the shaft, the bevel gear is engaged with the bevel gear; The axial adjusting part is arranged in the box and located at the end of the transmission shaft, the axial adjusting part includes an elastic member, the elastic member abuts against the end of the transmission shaft; The output shaft is rotatably arranged on the box, the output shaft is provided with a second tooth piece, and the second tooth piece is engaged with the first tooth piece.

2. A backlash reducing gear arrangement according to claim 1, characterised in that: Both ends of the transmission shaft are axially fixedly provided with a first bearing and a second bearing, the elastic member is a wave spring, the end wall in the box is provided with a first mounting groove, the wave spring is axially arranged in the first mounting groove, and the surface of the box cover is provided with a second mounting groove; The first bearing is slidably arranged in the first mounting groove and abuts against the wave spring, and the second bearing is slidably arranged in the second mounting groove.

3. A backlash reducing gear arrangement according to claim 2, characterised in that: The axial adjusting part further includes an adjusting nut, the surface of the box is provided with an adjusting screw hole, the adjusting screw hole is in communication with the first mounting groove, the adjusting nut is threadedly connected in the adjusting screw hole, and both ends of the wave spring abut against the adjusting nut and the first bearing.

4. A backlash reducing gear arrangement according to claim 1, characterised in that: The output shaft and the box are provided with a third bearing, and the end of the output shaft and the box cover are provided with a fourth bearing.

5. A backlash reducing gear arrangement according to claim 3, characterised in that: The bevel gear and the first tooth piece are respectively fixed between the transmission shaft and the transmission shaft, and the second tooth piece and the output shaft are fixed by gluing.

6. A backlash reducing gear arrangement according to claim 1, characterised in that: The shaft and the motor main body, and the output shaft and the box are provided with a skeleton oil seal.

7. A backlash reducing gear arrangement according to claim 1, characterised in that: Both end faces of the box cover are provided with a first sealing groove, the surface of the box cover is provided with a second sealing groove along the through hole, and the first sealing groove and the second sealing groove are provided with a sealing ring.

8. A backlash reducing gear arrangement according to claim 7, characterised in that: The sealing ring is made of rubber material.

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