Bimetal worm wheel assembly structure of speed reducer

Abstract

The utility model relates to the technical field of speed reducer production, in particular to a bimetallic worm wheel assembly structure of a speed reducer, which is reasonable in structural design, when assembly is needed, a locking block of an inner ring metal casting is firstly clamped into a guide groove of an outer ring metal casting, then the locking block is screwed into a locking groove of the outer ring metal casting, and the locking block is screwed into the guide groove of the outer ring metal casting. And then a riveting piece penetrating through the locking block is additionally arranged between the outer ring metal casting and the inner ring metal casting through a rivet pulling technology, in this way, axial deviation prevention and circumferential deviation prevention can be considered at the same time, axial deviation prevention mainly uses wall parts on the upper side and the lower side of a locking groove to stop axial displacement of the locking block, and circumferential deviation prevention mainly controls the rotating direction of a worm gear. The inner end face of the lock groove abuts against the inner end face of the lock block, namely, the lock block has the trend of moving inwards, so that the riveting piece does not need to bear torsion acting force, the overall structure is simple, and industrial production and assembly are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer manufacturing technology, and in particular to a bimetallic worm gear assembly structure for a speed reducer. Background Technology

[0002] The worm gear in a speed reducer primarily serves the following functions: 1) The worm gear and worm shaft work together to transmit motion and power between two intersecting shafts. This structural characteristic allows worm gear reducers to play a crucial role in situations where space is limited or the direction of power transmission needs to be changed. 2) Worm gear mechanisms can provide a large gear reduction ratio, meaning that the worm gear can reduce the input shaft speed while increasing the output shaft torque, thus meeting the different speed and torque requirements of various mechanical equipment. 3) The worm gear mechanism has a relatively compact structure, enabling efficient transmission within a limited space. Furthermore, since worm transmission is equivalent to helical transmission, it is a multi-tooth meshing transmission, thus featuring smooth transmission and low noise.

[0003] Worm gears in speed reducers are typically 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. Therefore, bimetallic worm gears, composed of outer and inner metal castings made of different materials, have emerged.

[0004] The existing bimetallic worm gear assembly structure design of the reducer is not reasonable enough. The connection structure between its outer ring metal casting and inner ring metal casting is not reliable enough. It cannot simultaneously take into account axial and circumferential anti-offset, and it is not conducive to industrial production assembly. Summary of the Invention

[0005] The purpose of this invention is to overcome the aforementioned problems in traditional technologies and provide a bimetallic worm gear assembly structure for a speed reducer.

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

[0007] A bimetallic worm gear assembly structure for a speed reducer, comprising:

[0008] An outer ring metal casting includes an outer ring body. The outer ring body has several protruding teeth along its outer side in the circumferential direction. The outer ring body has mounting holes inside. The sidewalls of the mounting holes have several guide grooves along the circumferential direction. The outer ring body has a locking groove on one side of each guide groove. The outer ring body has external riveting holes symmetrically opened on the upper and lower walls of the locking grooves.

[0009] An inner ring metal casting includes an inner ring body, the inner ring body has a shaft hole with a keyway inside, and the outer side of the inner ring body has a plurality of locking blocks that match the shape of the locking groove along the circumferential direction, and the locking blocks have internal riveting holes.

[0010] A riveting component, wherein the riveting component is installed in corresponding inner and outer riveting holes.

[0011] Furthermore, in the bimetallic worm gear assembly structure of the aforementioned reducer, the diameter of the mounting hole is equal to the outer diameter of the inner ring.

[0012] Furthermore, in the bimetallic worm gear assembly structure of the aforementioned reducer, the axial depth of the guide groove is equal to the axial thickness of the outer ring body, and the axial depth of the locking groove is less than the axial thickness of the outer ring body.

[0013] Furthermore, in the bimetallic worm gear assembly structure of the aforementioned reducer, the width of the guide groove is equal to or greater than the width of the locking groove.

[0014] Furthermore, in the bimetallic worm gear assembly structure of the aforementioned reducer, after the locking block is fully engaged in the corresponding locking groove via the guide groove, the inner riveting hole of the locking block is connected to the outer riveting holes on both sides of the locking groove, forming a riveting channel.

[0015] Furthermore, in the bimetallic worm gear assembly structure of the aforementioned reducer, the riveting component is installed in the riveting channel by a riveting process.

[0016] Furthermore, in the bimetallic worm gear assembly structure of the aforementioned reducer, the outer ring metal casting is made of a steel-based material.

[0017] Furthermore, in the bimetallic worm gear assembly structure of the aforementioned reducer, the inner ring metal casting is made of copper-based material.

[0018] The beneficial effects of this utility model are:

[0019] This utility model has a reasonable structural design, mainly composed of an outer ring metal casting, an inner ring metal casting, and a riveting component. When assembly is required, the locking block of the inner ring metal casting is first inserted into the guide groove of the outer ring metal casting. Then, the inner and outer ring metal castings are rotated relative to each other, so that the locking block of the inner ring metal casting is screwed into the locking groove of the outer ring metal casting. Then, a riveting component that penetrates the locking block is installed between the outer and inner ring metal castings through the riveting process. In this way, both axial and circumferential anti-displacement can be achieved simultaneously. Axial anti-displacement mainly uses the upper and lower walls of the locking groove to prevent the axial displacement of the locking block. Circumferential anti-displacement mainly controls the rotation direction of the worm gear so that the inner end face of the locking groove abuts against the inner end face of the locking block, that is, the locking block has a tendency to move inward. This allows the riveting component not to bear torsional force. The overall structure is relatively simple and conducive to industrial production and assembly.

[0020] 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

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the outer ring metal casting in this utility model;

[0024] Figure 3 This is a top view of the outer ring metal casting in this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the inner ring metal casting in this utility model;

[0026] Figure 5 This is a top view of the inner ring metal casting in this utility model;

[0027] Figure 6 This is a front view schematic diagram of the inner ring metal casting in this utility model;

[0028] In the attached diagram, the components represented by each number are as follows:

[0029] 1-Outer ring metal casting, 101-Outer ring body, 102-Protruding tooth, 103-Mounting hole, 104-Guide groove, 105-Locking groove, 106-Outer riveting hole; 2-Inner ring metal casting, 201-Inner ring body, 202-Shaft hole, 203-Locking block, 204-Inner riveting hole; 3-Riveting component. Detailed Implementation

[0030] 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.

[0031] like Figures 1-6As shown, this embodiment provides a bimetallic worm gear assembly structure for a speed reducer, including an outer ring metal casting 1, an inner ring metal casting 2, and a riveting component 3.

[0032] In this embodiment, the outer ring metal casting 1 includes an outer ring body 101. The outer ring body 101 has a plurality of protruding teeth 102 along the circumferential direction on its outer side. The outer ring body 101 has a mounting hole 103 inside. The sidewall of the mounting hole 103 has a plurality of guide grooves 104 along the circumferential direction. The outer ring body 1 has a locking groove 105 on one side of each guide groove 104. The outer ring body 101 has external riveting holes 106 symmetrically opened on the upper and lower walls of the locking groove 105.

[0033] In this embodiment, the inner ring metal casting 2 includes an inner ring body 201. The inner ring body 201 has a shaft hole 202 with a keyway inside. The outer side of the inner ring body 201 has a plurality of locking blocks 203 that match the shape of the locking groove 105 along the circumferential direction. The locking blocks 203 have internal riveting holes 204.

[0034] In this embodiment, the riveting component 3 is installed in the corresponding inner riveting hole 204 and outer riveting hole 106.

[0035] In this embodiment, the diameter of the mounting hole 103 is equal to the outer diameter of the inner ring 201.

[0036] In this embodiment, the axial depth of the guide groove 104 is equal to the axial thickness of the outer ring body 101, and the axial depth of the locking groove 105 is less than the axial thickness of the outer ring body 101. The width of the guide groove 104 is equal to or greater than the width of the locking groove 105.

[0037] In this embodiment, after the locking block 203 is fully inserted into the corresponding locking groove 105 via the guide groove 104, the inner riveting hole 204 of the locking block 203 is connected to the outer riveting holes 106 on both sides of the locking groove 105, and forms a riveting channel.

[0038] In this embodiment, the riveting component 3 is installed in the riveting channel by a riveting process.

[0039] In this embodiment, the outer ring metal casting 1 is made of steel-based material.

[0040] In this embodiment, the inner ring metal casting 2 is made of copper-based material.

[0041] A specific application of this embodiment is as follows: This bimetallic worm gear assembly structure mainly consists of an outer ring metal casting 1, an inner ring metal casting 2, and a riveting component 3. When assembly is required, first, the locking block 203 of the inner ring metal casting 2 is inserted into the guide groove 104 of the outer ring metal casting 1. Then, the inner ring metal casting 2 and the outer ring metal casting 1 are rotated relative to each other, so that the locking block 203 of the inner ring metal casting 2 is screwed into the locking groove 105 of the outer ring metal casting 1. Finally, the outer ring metal casting 1 and the inner ring metal casting 2 are connected by a riveting process. By adding a rivet 3 that penetrates the locking block 203, both axial and circumferential anti-displacement measures can be taken into account. Axial anti-displacement mainly uses the upper and lower walls of the locking groove 105 to prevent the locking block 203 from moving axially. Circumferential anti-displacement mainly controls the rotation direction of the worm gear so that the inner end face of the locking groove 105 abuts against the inner end face of the locking block 203, that is, the locking block 203 has a tendency to move inward. This allows the rivet 3 to not bear torsional force, and the overall structure is relatively simple, which is conducive to industrial production and assembly.

[0042] 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 worm gear assembly structure for a speed reducer, characterized in that, include: An outer ring metal casting includes an outer ring body. The outer ring body has several protruding teeth along its outer side in the circumferential direction. The outer ring body has mounting holes inside. The sidewalls of the mounting holes have several guide grooves along the circumferential direction. The outer ring body has a locking groove on one side of each guide groove. The outer ring body has external riveting holes symmetrically opened on the upper and lower walls of the locking grooves. An inner ring metal casting includes an inner ring body, the inner ring body has a shaft hole with a keyway inside, and the outer side of the inner ring body has a plurality of locking blocks that match the shape of the locking groove along the circumferential direction, and the locking blocks have internal riveting holes. A riveting component, wherein the riveting component is installed in corresponding inner and outer riveting holes.

2. The bimetallic worm gear assembly structure of the speed reducer according to claim 1, characterized by, The diameter of the mounting hole is equal to the outer diameter of the inner ring.

3. The bimetallic worm gear assembly structure of the speed reducer according to claim 1, characterized by The axial depth of the guide groove is equal to the axial thickness of the outer ring body, and the axial depth of the locking groove is less than the axial thickness of the outer ring body.

4. The bimetallic worm gear assembly structure of the speed reducer according to claim 1, characterized by The width of the guide groove is equal to or greater than the width of the guide groove.

5. The bimetallic worm gear assembly structure of the speed reducer according to claim 1, characterized by After the lock block is fully inserted into the corresponding lock groove via the guide groove, the inner riveting hole of the lock block is connected to the outer riveting holes on both sides of the lock groove, forming a riveting channel.

6. The bimetallic worm gear assembly structure of the speed reducer according to claim 5, characterized by The riveting components are installed in the riveting channel using a riveting process.

7. The bimetallic worm gear assembly structure of the speed reducer according to claim 1, characterized by The outer ring metal casting is made of steel-based material.

8. The bimetallic worm gear assembly structure of the speed reducer according to claim 1, characterized by, The inner ring metal casting is made of copper-based material.

Images