Right-angle speed reducer capable of adjusting mounting distance and axial clearance through elastic deformation

Abstract

The utility model discloses a right-angle speed reducer capable of adjusting installation distance and axial clearance through elastic deformation, which comprises a box body, an input shaft and an output shaft, the input shaft and the output shaft respectively form an input end and an output end on two sides of the box body, an input bevel gear is arranged on the input shaft, an output bevel gear is arranged on the output shaft, and the output bevel gear is arranged on the box body. The input bevel gear is meshed with the output bevel gear; at least one of the input shaft and the output shaft is sleeved with a distance ring in the axial direction, and the distance ring is provided with set deformation in the axial direction. The distance ring structure is arranged in the transmission structure of the input shaft and the output shaft, the axial installation distance during installation of the shaft and the gear is controlled and the axial gap is controlled or eliminated through the deformation characteristic of the distance ring in the axial direction, so that the gear and the shaft are tightly matched in the axial direction, stable meshing between gear transmission is ensured, and the transmission efficiency is improved. Therefore, the transmission stability and precision are ensured.

Description

Technical Field

[0001] The utility model belongs to the field of speed reducers and relates to a right-angle speed reducer which adjusts the installation distance and the axial clearance through elastic deformation. Background Art

[0002] A reducer is an independent component consisting of a gear transmission, a worm transmission, and a gear-worm transmission enclosed in a rigid housing. It is often used as a reduction transmission device between the prime mover and the working machine. The interior of a traditional gear reducer is a transmission structure formed by assembling multiple components such as shafts, gears, and bearings. It is affected by component processing errors, assembly errors, etc., which will cause assembly gaps between parts, such as the axial gap between the shaft and the gear, thereby affecting the meshing accuracy in the transmission structure. Especially in high-torque working scenarios, insufficient meshing accuracy leads to transmission noise, jitter, etc. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a right-angle reducer capable of adjusting the installation distance and the axial clearance through elastic deformation.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A right-angle reducer that adjusts the installation distance and axial clearance through elastic deformation includes a housing, an input shaft, and an output shaft, wherein the input shaft and the output shaft respectively form an input end and an output end on both sides of the housing, an input bevel gear is provided on the input shaft, and an output bevel gear is provided on the output shaft, and the input bevel gear is meshed with the output bevel gear; at least one of the input shaft and the output shaft is axially sleeved with a distance ring, and the distance ring is axially provided with a set deformation amount.

[0006] Furthermore, the distance ring includes a first ring piece and a second ring piece, the first ring piece and the second ring piece are stacked along the axial direction, the inner periphery of the first ring piece is axially protruding with an inner step, and the outer periphery of the second ring piece is axially protruding with an outer step.

[0007] Furthermore, the inner step abuts against an end of the second ring piece opposite to the outer step, or the outer step abuts against an end of the first ring piece opposite to the inner step.

[0008] Furthermore, the input shaft and the output shaft are arranged vertically.

[0009] Furthermore, it also includes a connecting shaft and a planetary gear train, the connecting shaft is coaxial with the output shaft, the planetary gear train includes an inner ring gear, a planetary carrier, planetary wheels and a sun gear shaft, the planetary wheels are mounted on the planetary carrier, the inner ring gear is fixedly connected to the housing and meshes with the outer sides of the planetary wheels, the sun gear shaft is coaxially connected to the connecting shaft and meshes with the inner sides of the planetary wheels, and the output shaft is coaxially connected to the planetary carrier.

[0010] Furthermore, the output bevel gear is spline-connected to the connecting shaft, a tapered roller bearing is provided on an outer sleeve of the output bevel gear, an adjusting nut is fitted on the outer periphery of the tapered roller bearing, and the adjusting nut is threadedly connected to the housing.

[0011] Furthermore, adjacent round nuts and locking washers are provided on the outer periphery of the input shaft, and the round nuts are threadedly connected to the input shaft.

[0012] In summary, the benefits of the present invention are:

[0013] The utility model provides a distance ring structure in the transmission structure of the input shaft and the output shaft. By utilizing the deformation characteristics of the distance ring in the axial direction, the axial installation distance between the shaft and the gear when being installed is controlled, the axial clearance is controlled or eliminated, and the gear and the shaft are tightly matched in the axial direction, thereby ensuring stable meshing between the gear transmissions and thus guaranteeing transmission stability and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the reducer of the present utility model.

[0015] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of A in the middle.

[0016] Markings in the figure: 1. Housing; 2. Input shaft; 21. Input bevel gear; 3. Output shaft; 31. Output bevel gear; 32. Planet carrier; 33. Sun gear shaft; 34. Internal ring gear; 4. Connecting shaft; 41. Adjusting nut; 51. First ring piece; 52. Second ring piece. DETAILED DESCRIPTION

[0017] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within these embodiments may be combined with one another, unless they conflict.

[0018] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed arbitrarily, and the component layout type may also be more complicated.

[0019] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0020] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the perpendicular relationship may actually be an approximately perpendicular relationship.

[0021] This embodiment provides a right-angle reducer that adjusts the installation distance and axial clearance by elastic deformation, referring to Figure 1 , including a housing 1, an input shaft 2, an output shaft 3, and a plurality of elastic distance rings arranged on the input shaft 2 and the output shaft 3, so as to control the installation distance and axial clearance between the input shaft 2 and the output shaft 3.

[0022] Specifically, the input shaft 2 is passed through one side of the housing 1 , and one end of the input shaft 2 forms an input end on the housing 1 . The input end is provided with an input flange for connecting the housing 1 to an external device, and torque is input through the input shaft 2 .

[0023] The outer periphery of the input shaft 2 is assembled with the housing 1 through deep groove ball bearings and tapered roller bearings, ensuring stable support and rotation of the input shaft 2 and enhancing the axial load-bearing capacity.

[0024] The output shaft 3 is passed through the other side of the box body 1 , and one end of the output shaft 3 forms an output end on the box body 1 . The output end is provided with an output flange for connecting the box body 1 to an external device, and outputting torque through the output shaft 3 .

[0025] The other end of the output shaft 3 extends into the housing 1 and is coaxially connected to a connecting shaft 4. The connecting shaft 4 is splined with an output bevel gear 31. An input bevel gear 21 is provided at the end of the input shaft 2. The input bevel gear 21 is engaged with the output bevel gear 31, thereby forming a torque transmission from the input shaft 2 to the connecting shaft 4 and the output shaft 3. At the same time, the input shaft 2 and the output shaft 3 form a vertical right-angle structure, which effectively reduces the total length of the reducer and controls the overall size.

[0026] One end of the connecting shaft 4 is connected to the housing 1 through a tapered roller bearing, and the outer periphery of the output bevel gear 31 is sleeved with a tapered roller bearing and connected to the housing 1 to form a support for the rotation of the connecting shaft 4. A flange is provided on the outer periphery of the connecting shaft 4 so that one axial end of the output bevel gear 31 abuts against the flange and the other end abuts against the tapered roller bearing, thereby realizing axial limitation of the output bevel gear 31 and the connecting shaft 4.

[0027] Furthermore, a planetary gear train is also provided in the housing 1, which includes an inner ring gear 34, a planet carrier 32, planetary wheels and a sun gear shaft 33. The planetary wheels are mounted on the planet carrier 32, and the sun gear shaft 33 is arranged between the output shaft 3 and the connecting shaft 4. The sun gear shaft 33 is spline-connected coaxially with the connecting shaft 4 or the output bevel gear 31, and the outer periphery of the sun gear shaft 33 is meshed with the inner side of the planetary wheel. The inner ring gear 34 is fixedly mounted on the housing 1, and the outer side of the planetary wheel is meshed with the inner ring gear 34. The planet carrier 32 is spline-connected coaxially with the output shaft 3 to realize torque transmission from the connecting shaft 4 to the output shaft 3.

[0028] In order to ensure the effective engagement of the output bevel gear 31 and the input bevel gear 21 and to ensure the axial stability of the output shaft 3, the connecting shaft 4 and the input shaft 2, refer to Figure 2 As shown, the distance ring has an annular structure and is inserted into the outer periphery of the shaft or the inner periphery of the housing 1. The axial ends of the distance ring are directly or indirectly pressed against the shaft and the housing 1 respectively, forming axial support for the shaft. The distance ring includes a first ring piece 51 and a second ring piece 52 coaxially stacked, wherein the inner periphery of the first ring piece 51 is provided with an inner step protruding along the axial direction, and the outer periphery of the second ring piece 52 is provided with an outer step protruding along the axial direction. When the distance ring is set, the inner step and the outer step are both in abutment state, so that the first ring piece 51 can have a certain deformation amount relative to the inner step in the axial direction, and the second ring piece 52 can have a certain deformation amount relative to the outer step in the axial direction. By setting a certain deformation amount when installed in place, the distance ring generates a reverse thrust on the shaft on which it is installed.

[0029] In this embodiment, the distance ring includes a first distance ring and a second distance ring. The first distance ring is coaxially arranged on the inner periphery of the housing 1 outside the input shaft 2, and the second distance ring is coaxially sleeved on the outer periphery of the connecting shaft 4. When the first distance ring and the second distance ring are installed in place, they respectively form a reverse thrust on the input shaft 2 and the output shaft 3 to control the axial clearance between the input shaft 2 and the output shaft 3, thereby maintaining the installation distance between the input bevel gear 21 and the output bevel gear 31.

[0030] Furthermore, a round nut is provided on the outer periphery of the input shaft 2 for pre-tightening the tapered roller bearing to prevent movement, and a locking washer is provided to prevent the round nut from failing.

[0031] An adjusting nut 41 is provided on the outer periphery of the connecting shaft 4. The adjusting nut 41 is threadedly connected to the inner wall of the box body 1 along the axial direction of the connecting shaft 4. The adjusting nut 41 directly or indirectly abuts against the connecting shaft 4 in the axial direction. In this embodiment, the adjusting nut 41 abuts against the tapered roller bearing on the output bevel gear 31. By rotating the adjusting nut 41 to adjust the axial position of the connecting shaft 4 and the deformation of the second distance ring, the axial clearance between the output bevel gear 31 and the connecting shaft 4 is controlled, and the installation distance between the input bevel gear 21 and the output bevel gear 31 is maintained.

[0032] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A right-angle reducer that adjusts the installation distance and axial clearance by elastic deformation, characterized in that: The invention comprises a housing (1), an input shaft (2), and an output shaft (3), wherein the input shaft (2) and the output shaft (3) respectively form an input end and an output end on both sides of the housing (1), an input bevel gear (21) is provided on the input shaft (2), and an output bevel gear (31) is provided on the output shaft (3), and the input bevel gear (21) is meshed with the output bevel gear (31); and a distance ring is sleeved axially on at least one of the input shaft (2) and the output shaft (3), and the distance ring is provided with a set deformation amount along the axial direction.

2. A right-angle reducer for adjusting the installation distance and axial clearance by elastic deformation according to claim 1, characterized in that: The distance ring comprises a first ring piece (51) and a second ring piece (52), wherein the first ring piece (51) and the second ring piece (52) are stacked in an axial direction, the inner periphery of the first ring piece (51) is provided with an inner step protruding in the axial direction, and the outer periphery of the second ring piece (52) is provided with an outer step protruding in the axial direction.

3. A right-angle reducer for adjusting the installation distance and axial clearance by elastic deformation according to claim 2, characterized in that: The inner step abuts against an end of the second ring piece (52) opposite to the outer step, or the outer step abuts against an end of the first ring piece (51) opposite to the inner step.

4. The right-angle reducer for adjusting the installation distance and axial clearance by elastic deformation according to claim 1, characterized in that: The input shaft (2) and the output shaft (3) are arranged vertically.

5. The right-angle reducer for adjusting the installation distance and axial clearance by elastic deformation according to claim 1, characterized in that: The invention also includes a connecting shaft (4) and a planetary gear train, wherein the connecting shaft (4) is coaxial with the output shaft (3), the planetary gear train includes an inner ring gear (34), a planetary carrier (32), planetary wheels and a sun gear shaft (33), the planetary wheels are mounted on the planetary carrier (32), the inner ring gear (34) is fixedly connected to the housing (1) and meshes with the outer side of the planetary wheels, the sun gear shaft (33) is coaxially connected to the connecting shaft (4) and meshes with the inner side of the planetary wheels, and the output shaft (3) is coaxially connected to the planetary carrier (32).

6. A right-angle reducer for adjusting installation distance and axial clearance by elastic deformation according to claim 5, characterized in that: The output bevel gear (31) is spline-connected to the connecting shaft (4); a tapered roller bearing is provided on the outer sleeve of the output bevel gear (31); an adjusting nut (41) is fitted on the outer periphery of the tapered roller bearing; and the adjusting nut (41) is threadedly connected to the housing (1).

7. The right-angle reducer for adjusting the installation distance and axial clearance by elastic deformation according to claim 1, characterized in that: Adjacent round nuts and stop washers are provided on the outer periphery of the input shaft (2), and the round nuts are threadedly connected to the input shaft (2).

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