Bimetal speed reducer worm gear convenient to assemble

Abstract

The utility model relates to the technical field of speed reducer production, in particular to a bimetallic speed reducer worm gear convenient to assemble, which is reasonable in structural design and mainly comprises an inner ring piece, two outer ring pieces and fastening screws, each outer ring piece is mounted on the outer side of the inner ring piece through the corresponding fastening screw, and the inner ring piece and the outer ring piece are integrally formed. On one hand, the mode that the fastening screws are installed from the outer side is adopted, the assembling operation is not affected by the specification of the inner ring piece, and assembling is convenient; on the other hand, the annular baffle is additionally arranged on the inner ring piece, the semicircular arc groove matched with the annular baffle is additionally arranged on the outer ring piece, and an axial limiting structure formed by the annular baffle and the semicircular arc groove is used for sharing the axial dislocation force borne by the fastening screw. Large deformation of the fastening screws is avoided, and subsequent smooth disassembly and replacement of the outer ring part are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer manufacturing technology, and in particular to a bimetallic speed reducer worm gear that is easy to assemble. Background Technology

[0002] Worm gears in speed reducers are generally made of either all-copper alloy or all-steel. However, all-steel worm gears suffer from poor meshing performance, while all-copper alloy worm gears have drawbacks such as high manufacturing and maintenance costs. With technological advancements, a new type of worm gear has emerged, comprising a steel base with mounting shaft holes and copper alloy worm gear teeth tightly connected to the steel base via bolts or pins. However, this bolted or pin-connected method suffers from poor connection stability between the steel base and the copper alloy worm gear teeth.

[0003] To address this, the patent specification with publication number CN218094107U discloses a bimetallic worm gear with an easily replaceable outer ring, comprising an outer ring, an inner ring, and a fastening screw. The outer ring includes a first ring body, with teeth evenly distributed circumferentially on its outer wall and staggered slots and outer fastening holes on its inner wall. The inner ring includes a second ring body, with a protrusion on its outer wall and staggered keyways and inner fastening holes on its inner wall. The fastening screw is screwed into the corresponding outer fastening hole through the inner fastening hole to fix the inner and outer rings together. This bimetallic worm gear structure mainly consists of a copper-based outer ring, a steel-based inner ring, and a fastening screw. The outer and inner rings are synchronously driven mainly by the slots and protrusions, and the fastening screw is used for axial positioning to prevent axial displacement after assembly. This bimetallic worm gear has the advantage of easy assembly and disassembly; when the outer ring is severely worn, it can be quickly disassembled and replaced.

[0004] The aforementioned bimetallic reducer worm gear has several drawbacks. First, it requires the fastening screws to be installed from the inner side of the inner ring, necessitating a relatively large inner diameter, making it unsuitable for assembling and machining small-sized bimetallic reducer worm gears. Second, it relies entirely on the fastening screws to withstand axial misalignment forces; if the fastening screws experience localized deformation, the outer ring may become difficult to disassemble and replace. Therefore, its structure needs to be optimized and improved. Utility Model Content

[0005] The purpose of this invention is to overcome the aforementioned problems in traditional technologies and provide a bimetallic reducer worm gear that is easy to assemble.

[0006] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0007] A bimetallic reducer worm gear that is easy to assemble includes an inner ring, an outer ring, and fastening screws. There are two outer rings, which are respectively installed on the outside of the inner ring by fastening screws.

[0008] The inner ring component includes a circular ring body. The upper and lower ends of the circular ring body are provided with annular baffles with increasing diameter. The circular ring body and the annular baffles are provided with keyways at the edge of the inner hole. The outer side of the circular ring body is provided with two sets of inner fastening holes symmetrically about the keyways.

[0009] The outer ring component includes a semi-circular plate with protruding teeth evenly distributed on its outer side. The semi-circular plate has semi-circular arc grooves symmetrically opened near its upper and lower ends to cooperate with the annular baffle. A set of outer fastening holes is opened in the middle of the semi-circular plate, and the positions of the outer fastening holes correspond one-to-one with the positions of the inner fastening holes. The fastening screw can be screwed into the inner fastening hole through the outer fastening hole.

[0010] Furthermore, in the aforementioned bimetallic reducer worm gear, the outer side of the annular body is provided with symmetrical positioning protrusions about the keyway, and the inner side of the outer ring is provided with positioning grooves that cooperate with the positioning protrusions.

[0011] Furthermore, in the aforementioned bimetallic reducer worm gear, each of the outer ring components is mounted on the outside of the inner ring component by two fastening screws, the included angle between the centers of the two fastening screws is 90 degrees, and the included angle between the centers of each fastening screw and the adjacent end of the outer ring component is 45 degrees.

[0012] Furthermore, in the aforementioned bimetallic reducer worm gear, the maximum thickness of the inner ring component is equal to the maximum thickness of the outer ring component.

[0013] Furthermore, in the aforementioned bimetallic reducer worm gear, the outer diameter of the annular baffle in the inner ring component is smaller than the outer diameter of the outer circular plate in the outer ring component.

[0014] Furthermore, in the aforementioned bimetallic reducer worm gear, the position of the outer fastening hole is offset from the position of the semi-circular groove.

[0015] Furthermore, in the aforementioned bimetallic reducer worm gear, the inner ring is made of a steel-based material.

[0016] Furthermore, in the aforementioned bimetallic reducer worm gear, the outer ring is made of a copper-based material.

[0017] The beneficial effects of this utility model are:

[0018] This utility model has a reasonable structural design, mainly consisting of an inner ring, an outer ring, and fastening screws. There are two outer rings, each mounted on the outside of the inner ring via fastening screws. Firstly, by using an outside mounting method, the assembly operation is not affected by the specifications of the inner ring, facilitating assembly. Secondly, by adding an annular baffle to the inner ring and a semi-circular groove to the outer ring that mates with the annular baffle, the axial limiting structure formed by the annular baffle and the semi-circular groove distributes the axial misalignment force borne by the fastening screws. This prevents significant deformation of the fastening screws and facilitates the subsequent easy disassembly and replacement of the outer rings.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is an exploded view of the overall structure of this utility model;

[0023] Figure 3 This is a structural schematic diagram of the inner ring component in this utility model;

[0024] Figure 4 This is a front view schematic diagram of the inner ring component in this utility model;

[0025] Figure 5 This is a structural schematic diagram of the outer ring component at one angle in this utility model;

[0026] Figure 6 This is a structural schematic diagram of the outer ring component from another angle in this utility model;

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1-Inner ring part, 101-Circular ring, 102-Annular baffle, 103-Keyway, 104-Inner fastening hole, 2-Outer ring part, 201-Semi-circular plate, 202-Protruding tooth, 203-Semi-circular groove, 204-Outer fastening hole, 3-Fasting screw. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figures 1-6 As shown, this embodiment provides a bimetallic reducer worm gear that is easy to assemble, including an inner ring 1, an outer ring 2, and fastening screws 3. There are two outer rings 2, which are respectively installed on the outside of the inner ring 1 by fastening screws 3.

[0031] In this embodiment, the inner ring component 1 includes a ring body 101. The upper and lower ends of the ring body 101 are provided with annular baffles 102 with increased diameter. The ring body 101 and the annular baffles 102 are provided with keyways 103 at the edge of the inner hole. The outer side of the ring body 101 is provided with two sets of inner fastening holes 104 symmetrically about the keyways 103.

[0032] In this embodiment, the outer ring component 2 includes a semi-circular plate 201. The outer side of the semi-circular plate 201 is evenly distributed with protruding teeth 202. The semi-circular plate 201 has symmetrically formed semi-circular arc grooves 203 near its upper and lower ends, which mate with the annular baffle 102. A set of external fastening holes 204 are formed in the middle of the semi-circular plate 201. The positions of the external fastening holes 204 correspond one-to-one with the positions of the internal fastening holes 104, allowing the fastening screws 3 to be screwed into the internal fastening holes 104 via the external fastening holes 204.

[0033] In this embodiment, the outer side of the ring 101 is provided with positioning protrusions symmetrically about the keyway 103. The cross-section of the positioning protrusion is rectangular, and the angle between the length direction of the positioning protrusion and the keyway is 90 degrees. The inner side of the outer ring 2 is provided with positioning grooves that cooperate with the positioning protrusions.

[0034] In this embodiment, each outer ring 2 is installed on the outside of the inner ring 1 by two fastening screws 3. The included angle between the centers of the two fastening screws 3 is 90 degrees, and the included angle between the centers of each fastening screw 3 and the adjacent end of the outer ring 2 is 45 degrees.

[0035] In this embodiment, the maximum thickness of the inner ring 1 is equal to the maximum thickness of the outer ring 2. The thickness of the portion of the inner ring 1 located between the two annular baffles 102 is equal to the thickness of the portion of the outer ring 2 located between the two semi-circular grooves 203.

[0036] In this embodiment, the outer diameter of the annular baffle 102 in the inner ring component 1 is smaller than the outer diameter of the outer circular plate in the outer ring component 2.

[0037] In this embodiment, the position of the external fastening hole 204 is offset from the position of the semi-circular groove 203.

[0038] In this embodiment, the inner ring 1 is made of steel-based material.

[0039] In this embodiment, the outer ring 2 is made of copper-based material.

[0040] A specific application of this embodiment is as follows: The worm gear of this bimetallic reducer mainly consists of an inner ring 1, an outer ring 2, and fastening screws 3. There are two outer rings 2, and each outer ring 2 is installed on the outside of the inner ring 1 by fastening screws 3. On the one hand, by using the method of installing the fastening screws 3 from the outside, the assembly operation is not affected by the specifications of the inner ring 1, which facilitates assembly. On the other hand, by adding an annular baffle 102 to the inner ring 1 and a semi-circular groove 203 that cooperates with the annular baffle 102 to the outer ring 2, the axial limiting structure formed by the annular baffle 102 and the semi-circular groove 203 is used to share the axial misalignment force borne by the fastening screws 3. This avoids large deformation of the fastening screws 3 and facilitates the smooth disassembly and replacement of the outer ring 2.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to specific implementation methods. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A bimetallic reducer worm gear that is easy to assemble, characterized in that: It includes an inner ring, an outer ring, and fastening screws. There are two outer rings, each mounted on the outside of the inner ring by fastening screws. The inner ring component includes a circular ring body. The upper and lower ends of the circular ring body are provided with annular baffles with increasing diameter. The circular ring body and the annular baffles are provided with keyways at the edge of the inner hole. The outer side of the circular ring body is provided with two sets of inner fastening holes symmetrically about the keyways. The outer ring component includes a semi-circular plate with protruding teeth evenly distributed on its outer side. The semi-circular plate has semi-circular arc grooves symmetrically opened near its upper and lower ends to cooperate with the annular baffle. A set of outer fastening holes is opened in the middle of the semi-circular plate, and the positions of the outer fastening holes correspond one-to-one with the positions of the inner fastening holes. The fastening screw can be screwed into the inner fastening hole through the outer fastening hole.

2. The bimetallic reducer worm gear according to claim 1, characterized in that: The outer side of the ring body is provided with positioning protrusions symmetrically about the keyway, and the inner side of the outer ring part is provided with positioning grooves that cooperate with the positioning protrusions.

3. The bimetallic reducer worm gear according to claim 1, characterized in that: Each of the outer ring components is mounted on the outside of the inner ring component by two fastening screws, with a central angle of 90 degrees between the two fastening screws and a central angle of 45 degrees between each fastening screw and the adjacent end of the outer ring component.

4. The bimetallic reducer worm gear according to claim 1, characterized in that: The maximum thickness of the inner ring component is equal to the maximum thickness of the outer ring component.

5. The bimetallic reducer worm gear according to claim 1, characterized in that: The outer diameter of the annular baffle in the inner ring component is smaller than the outer diameter of the outer circular plate in the outer ring component.

6. The bimetallic reducer worm gear according to claim 1, characterized in that: The position of the external fastening hole is offset from the position of the semi-circular groove.

7. The bimetallic reducer worm gear according to claim 1, characterized in that: The inner ring is made of a steel-based material.

8. The bimetallic reducer worm gear according to claim 1, characterized in that: The outer ring is made of copper-based material.

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