Slewing reducer without slewing bearing

Abstract

The utility model relates to a slewing reducer without a slewing bearing, which comprises a shell, the shell comprises a shell gear cavity and a shell worm cavity, a gear output shaft is arranged in the shell gear cavity, the gear output shaft comprises an output shaft body, a slewing gear is arranged on the output shaft body, a worm is arranged in the shell worm cavity, and the shell gear cavity and the shell worm cavity are respectively provided with a rotary gear. The rotary gear is meshed with the worm, a shell outer roller path is arranged on the inner circumferential wall of a shell gear cavity, an output shaft inner roller path is arranged on the outer circumferential wall of an output shaft body, the shell outer roller path and the output shaft inner roller path jointly form a rolling body working roller path, and a plurality of rolling bodies are arranged in the rolling body working roller path. According to the slewing reducer without the slewing bearing, the gear output shaft is connected with the shell through the rolling body, bolt connection of a traditional slewing bearing and the shell is replaced, performance is improved, meanwhile, the number of parts and machining faces of the parts are reduced, the structure is simple, and economical efficiency is better.

Description

Technical Field

[0001] This utility model discloses a slewing reducer without a slewing bearing, which is mainly used for slewing applications in engineering machinery and solar energy, and belongs to the technical field of slewing reducers. Background Technology

[0002] Existing rotary reducers mostly adopt a slewing bearing and worm gear structure, consisting of a housing (base), slewing bearing, worm gear, worm gear bearing, top plate (partially integrated with the outer ring of the slewing bearing), and seals. The inner ring of the slewing bearing is bolted to the rotary reducer housing (base), and the outer ring of the slewing bearing is connected to the top plate (some models lack a top plate). The slewing bearing (composed of an inner ring, toothed outer ring, steel balls, spacers, plugs, pins, inner ring seals, and outer ring seals) has a complex structure with many parts, requiring high precision in machining and assembly. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a slewing bearing-less slewing reducer that is in contrast to the above-mentioned prior art. Its gear output shaft is connected to the housing through rolling elements, which replaces the bolt connection between the traditional slewing bearing and the housing, improves performance, and reduces the number of parts and the machining surface of the parts. The structure is simple and more economical.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: a rotary reducer without a slewing bearing, comprising a housing, the housing including a housing gear cavity and a housing worm cavity, a gear output shaft disposed in the housing gear cavity, the gear output shaft including an output shaft body, a rotary gear disposed on the output shaft body, a worm disposed in the housing worm cavity, the rotary gear meshing with the worm, an outer raceway disposed on the inner peripheral wall of the housing gear cavity, an inner raceway disposed on the outer peripheral wall of the output shaft, the outer raceway and the inner raceway together forming a rolling element working raceway, and a plurality of rolling elements disposed in the rolling element working raceway.

[0005] Optionally, an oil reservoir is provided at the bottom of the outer raceway of the housing and the inner raceway of the output shaft.

[0006] Optionally, the outer raceway of the housing and the inner raceway of the output shaft have cross sections comprising two large circular arc segments with the same radius, arranged symmetrically vertically, with a small circular arc segment between the two large circular arc segments.

[0007] Optionally, the outer raceway of the housing and the inner raceway of the output shaft have cross-sections comprising two straight segments, which are arranged symmetrically vertically, with a small arc segment between them.

[0008] Optionally, the worm is disposed within the worm cavity of the housing via a worm bearing.

[0009] Optionally, a first sealing groove and a second sealing groove are provided on the inner peripheral wall of the gear cavity of the housing. The first sealing groove and the second sealing groove are respectively located on the upper and lower sides of the gear output shaft, and a first sealing element and a second sealing element are respectively provided in the first sealing groove and the second sealing groove.

[0010] Optionally, a first mounting flange is provided on the lower side of the housing, and a second mounting flange is provided on the upper side of the gear output shaft.

[0011] Compared with the prior art, the advantages of this utility model are:

[0012] This utility model discloses a rotary reducer without a slewing bearing. The gear output shaft is connected to the housing through rolling elements, which replaces the traditional bolted connection between the slewing bearing and the housing. This improves performance, reduces the number of parts and the machining surface of the parts, and makes the structure simpler and more economical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a rotary reducer without a slewing bearing according to this utility model.

[0014] Figure 2 This is a structural schematic diagram of a rotary reducer without a slewing bearing, as described in this utility model, from another perspective.

[0015] in:

[0016] Casing 1

[0017] Housing gear cavity 1.1

[0018] 1.2 worm gear cavity in the housing

[0019] Gear output shaft 2

[0020] Output shaft 2.1

[0021] Rotary gear 2.2

[0022] Worm 3

[0023] Outer raceway 4 of the housing

[0024] Output shaft inner raceway 5

[0025] 7 rolling elements

[0026] Oil storage tank 8

[0027] worm bearing 9

[0028] First sealing groove 10

[0029] Second sealing groove 11

[0030] First sealing element 12

[0031] Second sealing element 13

[0032] First mounting flange 14

[0033] Second mounting flange 15. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0035] like Figure 1 , Figure 2 As shown, this embodiment of a rotary reducer without a slewing bearing includes a housing 1, which includes a housing gear cavity 1.1 and a housing worm cavity 1.2. A gear output shaft 2 is disposed in the housing gear cavity 1.1, and the gear output shaft 2 includes an output shaft body 2.1. A rotary gear 2.2 is disposed on the output shaft body 2.1. A worm 3 is disposed in the housing worm cavity 1.2, and the rotary gear 2.2 meshes with the worm 3. An outer raceway 4 is disposed on the inner peripheral wall of the housing gear cavity 1.1, and an inner raceway 5 is disposed on the outer peripheral wall of the output shaft body 2.1. The outer raceway 4 and the inner raceway 5 together form a rolling element working raceway 6, and a plurality of rolling elements 7 are disposed in the rolling element working raceway 6.

[0036] The bottom of the outer raceway 4 of the housing and the inner raceway 5 of the output shaft are provided with oil storage tanks 8;

[0037] The outer raceway 4 of the housing and the inner raceway 5 of the output shaft have two large circular arc segments with the same radius. The two large circular arc segments are arranged symmetrically up and down, and a small circular arc segment (oil reservoir) is provided between the two large circular arc segments. The radius of the large circular arc segment is slightly larger than the radius of the rolling element 7 (steel ball). The two large circular arc segments are tangent to the rolling element first, and the small circular arc segment is used to increase the oil storage space of the raceway.

[0038] The outer raceway 4 of the housing and the inner raceway 5 of the output shaft can also include two straight segments, which are arranged symmetrically up and down, and a small arc segment (oil reservoir) is provided between the two straight segments.

[0039] The worm 3 is housed within the worm cavity 1.2 via the worm bearing 9;

[0040] The inner peripheral wall of the gear cavity 1.1 of the housing is provided with a first sealing groove 10 and a second sealing groove 11. The first sealing groove 10 and the second sealing groove 11 are respectively located on the upper and lower sides of the gear output shaft 2. The first sealing groove 10 and the second sealing groove 11 are respectively provided with a first sealing element 12 and a second sealing element 13.

[0041] The housing 1 has a first mounting flange 14 on its lower side and the gear output shaft 2 has a second mounting flange 15 on its upper side. When the product is used, the housing or the gear output shaft can be fixedly mounted.

[0042] Working principle:

[0043] The outer raceway of the housing, the inner raceway of the gear output shaft, and the rolling elements constitute a rotating component, enabling relative rotational motion. When the worm, mounted in the worm cavity of the housing, rotates, it drives the gear output shaft, supported by the rolling elements, to rotate. In application, the housing can be fixed for installation, allowing the gear output shaft to rotate; or the gear output shaft can be fixed for installation, allowing the housing (base) to rotate through the relative motion between the gear and the worm.

[0044] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A slewing bearing type slewing reducer characterized by: It includes the casing (1), the casing (1) includes casing gear cavity (1.1) and casing worm cavity (1.2), the gear output shaft (2) is arranged in the casing gear cavity (1.1), the gear output shaft (2) includes output shaft body (2.1), the output shaft body (2.1) is provided with rotary gear (2.2), the worm (3) is arranged in the casing worm cavity (1.2), the rotary gear (2.2) is engaged with worm (3), the casing outer raceway (4) is arranged on the inner wall of the casing gear cavity (1.1), the output shaft inner raceway (5) is arranged on the outer wall of the output shaft body (2.1), the casing outer raceway (4) and output shaft inner raceway (5) are jointly formed into rolling body working raceway (6), a plurality of rolling bodies (7) are arranged in the rolling body working raceway (6).

2. The slew reduction gear of claim 1, wherein: The bottom of the casing outer raceway (4) and the output shaft inner raceway (5) is provided with an oil storage groove (8).

3. A slewing reducer of the non-rotating bearing type according to claim 2, characterized in that: The casing outer raceway (4) and the output shaft inner raceway (5) cross section includes two radius same big circular arc segment, two big circular arc segment symmetrical arrangement, one small circular segment is arranged between two big circular arc segment.

4. The slew reduction gear of claim 2, wherein: The casing outer raceway (4) and the output shaft inner raceway (5) cross section includes two straight line segment, two straight line segment symmetrical arrangement, one small circular segment is arranged between two straight line segment.

5. The slew reduction gear of claim 1, wherein: The worm (3) is arranged in the casing worm cavity (1.2) through the worm bearing (9).

6. The slew reduction gear of claim 1, wherein: The first sealing groove (10) and the second sealing groove (11) are arranged on the inner wall of the casing gear cavity (1.1), the first sealing groove (10) and the second sealing groove (11) are respectively located on the upper and lower sides of the gear output shaft (2), the first sealing groove (10) and the second sealing groove (11) are respectively provided with the first sealing element (12) and the second sealing element (13).

7. The slew reduction gear of claim 1, wherein: The lower side of the casing (1) is provided with the first mounting flange (14), and the upper side of the gear output shaft (2) is provided with the second mounting flange (15).

Images