CN112762142A - Bearing type worm and helical gear reduction box - Google Patents

Abstract

The invention discloses a bearing type worm and helical gear reduction box which comprises a box body and a transmission structure, wherein the transmission structure comprises a helical gear transmission mechanism and a worm transmission mechanism; the helical gear transmission mechanism and the worm transmission mechanism are arranged in the box body in a meshing transmission manner; the bevel gear transmission mechanism comprises a stepped rotating shaft, a bevel gear and a plurality of bearing groups A, the stepped rotating shaft is fixed in the box body through the plurality of bearing groups A, the bevel gear is arranged on the stepped rotating shaft and is coaxial with the stepped rotating shaft, and one end of the stepped rotating shaft extends out of the box body to serve as an input end; the worm transmission mechanism comprises a worm and a bearing group B, the worm is fixed in the box body through the bearing group B and is meshed with the helical gear, and two ends of the worm extend out of the box body to serve as output ends. The transmission shaft and the transmission gear of the reduction gearbox have compact structure, so that the volume of the reduction gearbox is reduced; through the meshing transmission of the worm and the helical gear, the contact stress of the tooth surface of the gear is reduced, the gear is prevented from being abraded greatly, and the service life is prolonged.

Description

Bearing type worm and helical gear reduction box

Technical Field

The invention relates to the field of mechanical transmission, in particular to a bearing type worm and helical gear reduction box.

Background

A speed reducer is a power transmission mechanism that uses a speed converter of a gear to reduce the number of revolutions of a motor to a desired number of revolutions and obtain a large torque, and is widely used in mechanisms that transmit power and motion. The speed reducer comprises a reduction gearbox and a prime motor, the prime motor is connected with the reduction gearbox, and the prime motor is used for providing power for the reduction gearbox to realize torque transmission. At present, the transmission structure of the reduction gearbox used for the textile machine is not reasonable in design, scattered in structure, complex in transmission structure and large in occupied space, so that the volume of the reduction gearbox is enlarged; in addition, the gear of the transmission structure is unreasonable in arrangement, so that the gear is seriously abraded, the defects of high temperature, high noise and the like are caused, and after the transmission structure is used for a long time, the gear is greatly abraded, and the service life of the reduction gearbox is seriously influenced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a bearing type worm and helical gear reduction box, the structure between each transmission shaft and a transmission gear is compact, and the volume of the reduction box is reduced; the worm is in meshing transmission with the helical gear, so that the contact stress of the tooth surface of the gear is reduced, and the gear is prevented from being abraded greatly; the rotation precision of the rotating shaft is ensured through the bearing group on the stepped rotating shaft, and the friction coefficient in the movement process of the rotating shaft is reduced, so that the rotating shaft has good bearing performance and high transmission efficiency; in conclusion, the reduction gearbox has the advantages of compact structure, small size, stable transmission, good bearing performance, high transmission efficiency, low noise, higher reliability and the like.

The purpose of the invention is realized by adopting the following technical scheme:

a bearing type worm and helical gear reduction box comprises a box body and a transmission structure, wherein the transmission structure comprises a helical gear transmission mechanism and a worm transmission mechanism;

the helical gear transmission mechanism and the worm transmission mechanism are arranged in the box body in a meshing transmission manner;

the bevel gear transmission mechanism comprises a stepped rotating shaft, a bevel gear and a plurality of bearing groups A, the stepped rotating shaft is fixed in the box body through the plurality of bearing groups A, the bevel gear is arranged on the stepped rotating shaft and is coaxial with the stepped rotating shaft, and one end of the stepped rotating shaft extends out of the box body to serve as an input end;

the worm transmission mechanism comprises a worm and a bearing group B, the worm is fixed in the box body through the bearing group B and is meshed with the helical gear, and two ends of the worm extend out of the box body to serve as output ends.

Further, the plurality of bearing groups A comprise a first sub-bearing group A, a second sub-bearing group A and a third sub-bearing group A; the ladder axis of rotation has the degressive first shaft section of connecting gradually and diameter, second shaft section, third shaft section and output shaft section, the helical gear is located on the first shaft section, first shaft section is fixed in through first subshaft group A in the box, the second shaft section is fixed in the box through second subshaft group A, the third shaft section is fixed in through third subshaft group A in the box, the output shaft section extends out the external formation of box the input.

Further, the first sub-bearing group A comprises a first bearing A and a second bearing A, the first bearing A is fixed on the box body through shaft shoulder positioning and is connected with the first shaft section in a matched mode, the second bearing A is fixed on the box body through an elastic retainer ring sleeved on the first shaft section in a positioned mode and is connected with the first shaft section in a matched mode, and the bevel gear is arranged between the first bearing A and the second bearing A.

Further, the second sub-bearing group A is a third bearing A, and the third bearing A is fixed on the box body through shaft shoulder positioning and is connected with the second shaft section in a matched mode.

Further, third subshaft bearing group A includes fourth bearing A and fifth bearing A, fourth bearing A is fixed in through the shaft shoulder location on the box and with the cooperation of third axial segment is connected, fifth bearing A is fixed in through the circlip location of cover on the third axial segment on the box and with the cooperation of third axial segment is connected.

Furthermore, the box body is provided with a protruding part which is of a hollow structure and communicated with an inner cavity of the box body, a cavity of the protruding part is used for accommodating the second shaft section and the third shaft section, and the output shaft section extends out of the box body from the inner cavity of the protruding part; the outer ring of the third bearing A is fixed in the inner cavity of the bulge, and the inner ring of the third bearing A is connected with the second shaft section in a matched mode.

Further, the outer rings of the fourth bearing A and the fifth bearing A are fixed in the inner cavities of the protruding portions respectively, and the inner rings of the fourth bearing A and the fifth bearing A are connected with the third shaft section in a matched mode respectively.

Further, the bearing group B comprises a first bearing B and a second bearing B, one end of the worm is fixed in the box body through the first bearing B, and the other end of the worm is fixed in the box body through the second bearing B.

Further, the first bearing B and the second bearing B are both tapered roller bearings.

Further, the first bearing A and the second bearing A are both deep groove ball bearings.

Compared with the prior art, the invention has the beneficial effects that:

the transmission shaft and the transmission gear of the reduction gearbox have compact structure, so that the volume of the reduction gearbox is reduced; the worm is in meshing transmission with the helical gear, so that the contact stress of the tooth surface of the gear is reduced, and the gear is prevented from being abraded greatly; the rotation precision of the rotating shaft is ensured through the bearing group on the stepped rotating shaft, and the friction coefficient in the movement process of the rotating shaft is reduced, so that the rotating shaft has good bearing performance and high transmission efficiency; in conclusion, the reduction gearbox has the advantages of compact structure, small size, stable transmission, good bearing performance, high transmission efficiency, low noise, higher reliability and the like.

Drawings

FIG. 1 is a schematic structural view of a reduction gearbox according to the present invention;

FIG. 2 is a schematic structural diagram of a transmission structure according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a stepped rotating shaft according to an embodiment of the present invention;

FIG. 4 is a front view of the reduction gearbox of the present invention;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;

fig. 6 is a cross-sectional view at B-B in fig. 4.

In the figure: 1. a box body; 10. a projection; 2. a transmission structure; 20. a helical gear transmission mechanism; 200. a stepped rotating shaft; 2000. a first shaft section; 2001. a second shaft section; 2002. a third shaft section; 2003. an output shaft section; 201. a first sub-bearing group A; 2010. a first bearing A; 2011. a second bearing A; 202. a second sub-bearing group A; 203. a third sub-bearing group A; 2030. a fourth bearing A; 2031. a fifth bearing A; 204. a helical gear; 21. a worm drive; 210. a worm; 211. a first bearing B; 212. a second bearing B; 3. a first cover plate; 4. and a second cover plate.

Detailed Description

The present invention will be described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the following description, various embodiments or technical features may be arbitrarily combined to form a new embodiment without conflict.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The implementation mode is as follows:

as shown in figures 1-6, the invention shows a bearing type worm bevel gear reduction box. As shown in figures 1 and 2, the reduction gearbox comprises a box body 1 and a transmission structure 2, wherein the transmission structure 2 comprises a bevel gear transmission mechanism 20 and a worm transmission mechanism 21, and the bevel gear transmission mechanism 20 and the worm transmission mechanism 21 are arranged in the box body 1 in a meshing transmission manner. The bevel gear transmission mechanism 20 comprises a stepped rotating shaft 200, a bevel gear 204 and a plurality of bearing sets A, wherein the stepped rotating shaft 200 is fixed in the box body 1 through the plurality of bearing sets A, the bevel gear 204 is arranged on the stepped rotating shaft 200 and is coaxially arranged with the stepped rotating shaft 200, and the bevel gear 204 is in key connection with the stepped rotating shaft 200, so that the bevel gear 204 rotates along with the rotation of the stepped rotating shaft 200. Of course, one end of the stepped rotating shaft 200 extends out of the box body 1 to serve as an input end, the input end is in driving connection with an output shaft of a prime power motor, and the prime power motor is used for providing transmission power for the reduction gearbox.

The worm transmission mechanism 21 includes a worm 210 and a bearing set B, the worm 210 is fixed in the box 1 through the bearing set B and is meshed with the helical gear 204, two ends of the worm 210 extend out of the box 1 to serve as output ends, the output ends are connected with an external working machine or an execution mechanism, that is, under the driving of a prime motor, the helical gear 204 rotates, and the helical gear 204 is meshed with the worm 210 for transmission, so that the transmission of torque is realized.

When the gearbox is used, the gearbox is provided with two output ends, so that the gearbox can be conveniently connected with an external working machine or an actuating mechanism, double output is realized, and the driving efficiency of the gearbox is improved; in the meshing transmission process of the worm transmission mechanism 21 and the helical gear transmission mechanism 20 of the reduction gearbox, the stepped rotating shaft 200 and the worm 210 are vertically arranged, so that the structure between each transmission shaft and each transmission gear is compact, the volume of the reduction gearbox is reduced, and the reduction gearbox is compact in structure; in addition, the worm 210 and the helical gear 204 are in meshing transmission, so that the contact stress of the tooth surface of the gear is reduced, the gear is prevented from being abraded greatly, and the service life of the reduction gearbox is prolonged; in the transmission process of the transmission structure 2 of the reduction gearbox, the rotation precision of the rotating shaft is ensured through the bearing set on the stepped rotating shaft 200, the friction coefficient in the movement process is reduced, and the bearing performance and the transmission efficiency are good; in conclusion, the reduction gearbox has the advantages of compact structure, small size, stable transmission, good bearing performance, high transmission efficiency, low noise, higher reliability and the like, and meanwhile, the worm 210 and the helical gear 204 are meshed for transmission, so that the reduction gearbox also has the effect of good braking effect.

Further explaining the present embodiment, as shown in fig. 2 and 3, the plurality of bearing sets a includes a first sub-bearing set a201, a second sub-bearing set a202, and a third sub-bearing set a 203; the stepped rotating shaft 200 is provided with a first shaft section 2000, a second shaft section 2001, a third shaft section 2002 and an output shaft section 2003 which are sequentially connected and have decreasing diameters; the bevel gear 204 is arranged on the first shaft section 2000, and the first shaft section 2000 is fixed in the box body 1 through a first sub-bearing group A201. This first subshaft set A201 is including first bearing A2010 and second bearing A2011, and first bearing A2010 and second bearing A2011 are deep groove ball bearing, are applicable to the operation of high rotational speed even extremely high rotational speed, and are very durable moreover, need not often to maintain.

As shown in fig. 5, the first bearing a2010 is fixed on the housing 1 by a shoulder positioning and is connected with the first shaft section 2000 in a matching manner, that is, an outer ring of the first bearing a2010 is fixed with an inner cavity of the housing 1, an inner ring of the first bearing a2010 is connected with the first shaft section 2000 in a matching manner, and the first bearing a2010 can prevent the first bearing a2010 from moving in an axial direction by the shoulder positioning. Second bearing A2011 is fixed in through the circlip location of establishing on first shaft section 2000 on the box 1 and with first shaft section 2000 cooperation is connected, and it is also that the outer lane of second bearing A2011 is fixed with the inner chamber of box 1, and the inner circle of second bearing A2011 is connected with first shaft section 2000 cooperation, and second bearing A2011 can prevent the axial float of second bearing A2011 through the circlip location. Of course, the helical gear 204 is arranged between the first bearing a2010 and the second bearing a2011, that is, the helical gear 204 is clamped between the first bearing a2010 and the second bearing a2011, and the first bearing a2010 and the second bearing a2011 are used as auxiliary power of the first shaft section 2000, so that the rotation precision of the first shaft section 2000 is ensured, the friction coefficient in the movement process of the first shaft section is reduced, the bearing performance of the first shaft section is good, the transmission efficiency is higher, and therefore the helical gear 204 connected with the first shaft section 2000 in a key mode runs stably, and the rotation precision is higher.

Further explaining the present embodiment, as shown in fig. 2 or fig. 5, the box body 1 has a protruding portion 10, the protruding portion 10 is a hollow structure and is communicated with the inner cavity of the box body 1, and the cavity of the protruding portion 10 is used for accommodating the second shaft segment 2001 and the third shaft segment 2002. The second shaft segment 2001 is fixed in the box body 1 by a second sub-bearing group a202, and the third shaft segment 2002 is fixed in the box body 1 by a third sub-bearing group a 203. That is, on the basis that the first shaft segment 2000 is fixed in the inner cavity of the box body 1, the second shaft segment 2001 is fixed in the inner cavity of the protruding portion 10 through the second sub-bearing set a202, and the third shaft segment 2002 is fixed in the inner cavity of the protruding portion 10 through the third sub-bearing set a 203. The output shaft section 2003 extends out of the box body 1 to form the input end, namely the output shaft section 2003 extends out of the box body 1 from the inner cavity of the bulge part 10, so that the reduction gearbox is compact in structure and small in size.

In the preferred embodiment, as shown in fig. 2 or fig. 5, the second sub-bearing group a202 is a third bearing a, and by adopting the above technical solution that the second shaft section 2001 is fixed in the box body 1 through the second sub-bearing group a202, it can be understood that the third bearing a is fixed on the box body 1 through a shaft shoulder and is in fit connection with the second shaft section 2001, that is, an outer ring of the third bearing a is fixed in an inner cavity of the protruding portion 10, and an inner ring of the third bearing a is in fit connection with the second shaft section 2001. Of course, the third bearing a can prevent the axial play of the shaft shoulder through the positioning of the shaft shoulder, and in addition, the third bearing a is used as the auxiliary power of the second shaft section 2001, so that the rotation precision of the second shaft section 2001 is ensured, the friction coefficient in the movement process is reduced, the bearing performance is good, and the transmission efficiency is higher.

In this preferred embodiment, as shown in fig. 2 or fig. 5, the third sub-bearing group a203 includes a fourth bearing a2030 and a fifth bearing a2031, and with the above technical solution that the third shaft segment 2002 is fixed in the box body 1 through the third sub-bearing group a203, it can be understood that the fourth bearing a2030 is fixed on the box body 1 through a shoulder and is in fit connection with the third shaft segment 2002, the fifth bearing a2031 is fixed on the box body 1 through a circlip sleeved on the third shaft segment 2002 and is in fit connection with the third shaft segment 2002, that is, outer rings of the fourth bearing a2030 and the fifth bearing a2031 are respectively fixed in an inner cavity of the protruding portion 10, and inner rings of the fourth bearing a2030 and the fifth bearing a2031 are in fit connection with the third shaft segment 2002. It will be appreciated that the fourth bearing a2030 is prevented from axial play by the location of the shoulder and the fifth bearing a2031 is prevented from axial play by the location of the circlip. The fourth bearing A2030 and the fifth bearing A2031 are used as auxiliary power of the third shaft section 2002, so that the rotation precision of the third shaft section 2002 is ensured, the friction coefficient in the movement process is reduced, the bearing performance is good, and the transmission efficiency is higher.

Further explaining the present embodiment, as shown in fig. 2 or fig. 6, the bearing set B includes a first bearing B211 and a second bearing B212, one end of the worm 210 is fixed in the box body 1 through the first bearing B211, and the other end of the worm 210 is fixed in the box body 1 through the second bearing B212. That is, the outer ring of the first bearing B211 is fixed to the inner cavity of the housing 1, the inner ring of the first bearing B211 is connected to the worm 210 in a fitting manner, the outer ring of the second bearing B212 is fixed to the inner cavity of the housing 1, and the inner ring of the second bearing B212 is connected to the worm 210 in a fitting manner, so that the worm gear 21 is fixed to the housing 1. Because the two ends of the worm 210 extend out of the box body 1 to serve as output ends, and the load and the impact load are large, the first bearing B211 and the second bearing B212 are both tapered roller bearings, and the tapered roller bearings have large radial bearing capacity, can bear heavy load and impact load, and have large load capacity.

In this preferred embodiment, the box body 1 is further provided with a first cover plate 3, the first cover plate 3 is located at a position opposite to the input end, the first cover plate 3 is connected with the box body 1 in a matching manner, and the first cover plate 3 is detachably connected with the box body 1. That is, the operator can inspect or maintain and repair various parts of the bevel gear transmission mechanism 20 in the box body 1 by detaching the first cover plate 3, and the detachable connection mode is preferably a screw connection mode in the embodiment. Of course, still be provided with second apron 4 on the box 1, second apron 4 is located the position that worm 210 extends to the box 1, second apron 4 is connected with the box 1 cooperation, second apron 4 can dismantle with box 1 and be connected, and the preferred mode of dismantling the connection of this embodiment is screw connection. Of course, the oil leakage of the reduction gearbox can be prevented through the arrangement of the first cover plate 3 and the second cover plate 4.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (10)

1. The utility model provides a bearing formula worm helical gear reducing gear box, includes box and transmission structure, its characterized in that: the transmission structure comprises a helical gear transmission mechanism and a worm transmission mechanism;

the helical gear transmission mechanism and the worm transmission mechanism are arranged in the box body in a meshing transmission manner;

the bevel gear transmission mechanism comprises a stepped rotating shaft, a bevel gear and a plurality of bearing groups A, the stepped rotating shaft is fixed in the box body through the plurality of bearing groups A, the bevel gear is arranged on the stepped rotating shaft and is coaxial with the stepped rotating shaft, and one end of the stepped rotating shaft extends out of the box body to serve as an input end;

the worm transmission mechanism comprises a worm and a bearing group B, the worm is fixed in the box body through the bearing group B and is meshed with the helical gear, and two ends of the worm extend out of the box body to serve as output ends.

2. The bearing type worm bevel gear reduction box according to claim 1, characterized in that: the plurality of bearing groups A comprise a first sub-bearing group A, a second sub-bearing group A and a third sub-bearing group A; the ladder axis of rotation has the degressive first shaft section of connecting gradually and diameter, second shaft section, third shaft section and output shaft section, the helical gear is located on the first shaft section, first shaft section is fixed in through first subshaft group A in the box, the second shaft section is fixed in the box through second subshaft group A, the third shaft section is fixed in through third subshaft group A in the box, the output shaft section extends out the external formation of box the input.

3. The bearing type worm bevel gear reduction box according to claim 2, characterized in that: first subshaft set A includes first bearing A and second bearing A, first bearing A is fixed in through the shaft shoulder location on the box and with first axle section cooperation is connected, second bearing A is fixed in through the circlip location of cover on the first axle section on the box and with first axle section cooperation is connected, the helical gear arrange in between first bearing A and the second bearing A.

4. The bearing type worm bevel gear reduction box according to claim 2, characterized in that: and the second sub-bearing group A is a third bearing A, and the third bearing A is positioned and fixed on the box body through a shaft shoulder and is connected with the second shaft section in a matching way.

5. The bearing type worm bevel gear reduction box according to claim 2, characterized in that: the third sub-bearing group A comprises a fourth bearing A and a fifth bearing A, the fourth bearing A is fixed on the box body through shaft shoulder positioning and is connected with the third shaft section in a matched mode, and the fifth bearing A is fixed on the box body through an elastic retainer ring which is sleeved on the third shaft section in a positioned mode and is connected with the third shaft section in a matched mode.

6. The bearing type worm bevel gear reducer box according to claim 5, characterized in that: the box body is provided with a bulge, the bulge is of a hollow structure and is communicated with the inner cavity of the box body, the cavity of the bulge is used for accommodating the second shaft section and the third shaft section, and the output shaft section extends out of the box body from the inner cavity of the bulge; the outer ring of the third bearing A is fixed in the inner cavity of the bulge, and the inner ring of the third bearing A is connected with the second shaft section in a matched mode.

7. The bearing type worm bevel gear reducer box according to claim 6, characterized in that: the outer rings of the fourth bearing A and the fifth bearing A are fixed in the inner cavities of the protruding portions respectively, and the inner rings of the fourth bearing A and the fifth bearing A are connected with the third shaft section in a matched mode respectively.

8. The bearing type worm bevel gear reduction box according to claim 1, characterized in that: the bearing group B comprises a first bearing B and a second bearing B, one end of the worm is fixed in the box body through the first bearing B, and the other end of the worm is fixed in the box body through the second bearing B.

9. The bearing type worm bevel gear reducer box according to claim 8, characterized in that: the first bearing B and the second bearing B are both tapered roller bearings.

10. The bearing type worm bevel gear reduction box according to claim 3, characterized in that: the first bearing A and the second bearing A are both deep groove ball bearings.

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