Injection molding worm assembly with double-end gear structure
By using a composite design of 42CrMo iron core and POM plastic worm gear injection molding, combined with a specific structure, the problems of high processing difficulty and poor wear resistance of plastic worm gear components have been solved, achieving low-cost, high-efficiency production and improved driving comfort.
Patent Information
- Application Number
- CN202520785727.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-04-24
AI Technical Summary
Existing plastic worm gear components are difficult to process and have poor wear resistance, resulting in high manufacturing costs and high meshing noise, which limits mass production efficiency and driving comfort.
The design incorporates a 42CrMo iron core and POM plastic worm gear and worm wheel injection molding composite design, combined with structures such as gear ring, threaded sleeve, limit plate, magnetic ring and guide groove, to improve strength and wear resistance, reduce meshing noise, and simplify the design to improve production efficiency.
It reduces manufacturing costs and weight, improves driving comfort and production efficiency, meets the needs of lightweight and efficient production, and conforms to environmental protection trends.
Smart Images
Figure CN223806580U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of automobile parts, and relates to a worm assembly, in particular to a double-end gear structure injection molding worm assembly. BACKGROUND
[0002] The automobile steering system is an important part of the automobile, which directly affects the driving safety of the automobile. Among them, the height adjustment of the steering wheel is one of the important functions of the automobile steering system, which can be adjusted according to the height of the driver and the driving habit to improve the driving comfort and safety. The existing steering wheel height adjustment mechanism usually adopts a metal worm assembly. The advantages of this assembly are high strength and wear resistance, but its manufacturing cost is high, the processing difficulty is large, and the weight is large. With the development of science and technology, plastic worm assemblies are gradually applied to automobile steering systems.
[0003] However, the existing plastic worm assembly technology still has some problems. First, although the material cost of the plastic worm assembly is low, its processing difficulty is still large, which increases the manufacturing cost to some extent. Secondly, due to the relatively poor wear resistance of the plastic worm assembly, the meshing noise is still large after a long time of use, which will affect the driving comfort. In addition, the design of the existing plastic worm assembly is still relatively complex, which limits the improvement of the batch production efficiency to some extent. SUMMARY
[0004] The utility model discloses a double-end gear structure injection molding worm assembly that guarantees the strength and wear resistance of the worm assembly, effectively reduces the meshing noise, and reduces the production cost.
[0005] The utility model discloses a double-end gear structure injection molding worm assembly, including the worm, the right side fixed coupling of worm has the worm wheel, the right side fixed coupling of worm wheel has the iron core pole, the left side of iron core pole respectively penetrates worm wheel and worm and extends to the outside of worm, the surface fixed sleeve of iron core pole has the tooth ring, the inner wall of worm and worm wheel all are seted up tooth groove, the side of tooth ring away from iron core pole extends to the inner chamber of tooth groove.
[0006] The application can be engaged with the tooth groove by setting the tooth ring, and the worm is stably driven to rotate in the rotation process of the iron core rod, realizing stable transmission of rotation force. The worm, the worm wheel and the iron core rod are composed of 42CrMo iron core, POM plastic worm and POM plastic worm wheel injection molding composite. This design not only guarantees the strength and wear resistance of the worm assembly, but also effectively reduces the meshing noise and improves the driving comfort.
[0007] In the double-head gear structure injection molding worm assembly, the two sides of the surface of the iron core rod are sleeved with threaded sleeves, the inner wall of the threaded sleeve is threadedly connected with the outer surface of the iron core rod, one side of the threaded sleeve is fixedly connected with a limiting disc, and the worm and the worm wheel are located between the two limiting discs. By arranging the threaded sleeve and the limiting disc, the worm wheel and the worm can be tightly fixed, the stability of the connection between the worm wheel, the worm and the iron core rod is improved, the separation and disassembly of the worm wheel, the worm and the iron core rod are facilitated, the iron core rod can be recycled after the plastic worm wheel and the worm are damaged, and economic cost is saved.
[0008] In the double-head gear structure injection molding worm assembly, the two sides of the surface of the iron core rod are sleeved with threaded sleeves, the inner wall of the threaded sleeve is threadedly connected with the outer surface of the iron core rod, one side of the threaded sleeve is fixedly connected with a limiting disc, and the worm and the worm wheel are located between the two limiting discs. By arranging the threaded sleeve and the limiting disc, the worm wheel and the worm can be tightly fixed, the stability of the connection between the worm wheel, the worm and the iron core rod is improved, the separation and disassembly of the worm wheel, the worm and the iron core rod are facilitated, the iron core rod can be recycled after the plastic worm wheel and the worm are damaged, and economic cost is saved.
[0009] In the double-head gear structure injection molding worm assembly, the two sides of the surface of the iron core rod are sleeved with threaded sleeves, the inner wall of the threaded sleeve is threadedly connected with the outer surface of the iron core rod, one side of the threaded sleeve is fixedly connected with a limiting disc, and the worm and the worm wheel are located between the two limiting discs. By arranging the threaded sleeve and the limiting disc, the worm wheel and the worm can be tightly fixed, the stability of the connection between the worm wheel, the worm and the iron core rod is improved, the separation and disassembly of the worm wheel, the worm and the iron core rod are facilitated, the iron core rod can be recycled after the plastic worm wheel and the worm are damaged, and economic cost is saved.
[0010] In the double-head gear structure injection molding worm assembly, the two sides of the surface of the iron core rod are sleeved with threaded sleeves, the inner wall of the threaded sleeve is threadedly connected with the outer surface of the iron core rod, one side of the threaded sleeve is fixedly connected with a limiting disc, and the worm and the worm wheel are located between the two limiting discs. By arranging the threaded sleeve and the limiting disc, the worm wheel and the worm can be tightly fixed, the stability of the connection between the worm wheel, the worm and the iron core rod is improved, the separation and disassembly of the worm wheel, the worm and the iron core rod are facilitated, the iron core rod can be recycled after the plastic worm wheel and the worm are damaged, and economic cost is saved.
[0011] In the double-head gear structure injection molding worm assembly, the two sides of the surface of the iron core rod are sleeved with threaded sleeves, the inner wall of the threaded sleeve is threadedly connected with the outer surface of the iron core rod, one side of the threaded sleeve is fixedly connected with a limiting disc, and the worm and the worm wheel are located between the two limiting discs. By arranging the threaded sleeve and the limiting disc, the worm wheel and the worm can be tightly fixed, the stability of the connection between the worm wheel, the worm and the iron core rod is improved, the separation and disassembly of the worm wheel, the worm and the iron core rod are facilitated, the iron core rod can be recycled after the plastic worm wheel and the worm are damaged, and economic cost is saved.
[0012] Compared with the prior art, the double-head gear structure injection molding worm assembly has the following advantages:
[0013] 1. The plastic worm gear assembly of the utility model adopts 42CrMo iron core, POM plastic helical gear and POM plastic worm wheel injection molding composite composition, which not only guarantees the strength and wear resistance of the worm gear assembly, but also reduces its weight and manufacturing cost, meets the demand of the automobile steering system for high strength, light weight and low cost, secondly, the plastic worm gear assembly has small meshing noise, improves the driving comfort, meets the demand of the automobile seat height adjustment for the mute performance, in addition, the plastic worm gear assembly is simple in design, which is beneficial to improve the batch production efficiency, meets the demand of the mechanical equipment manufacturer for high efficiency production, has wide market prospect and application value.
[0014] 2. The utility model discloses a plastic worm gear assembly, compared with the traditional metal worm gear assembly, the material cost is lower, thereby reduce the manufacturing cost of whole automobile steering system, simultaneously, reduce the processing cost to a certain extent, compared with the existing plastic worm gear assembly, simplify the design while guaranteeing the performance, reduce the production difficulty, thereby improve the production efficiency, the plastic worm gear assembly is light in weight, this has important significance to realize the light weight of automobile, simultaneously, the light weight automobile is also favorable to improve fuel economy and reduce the discharge, accords with the current environmental protection trend. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the structure schematic diagram of the explosion of the double head gear structure injection molding worm gear assembly.
[0016] Figure 2 It is the side view structure schematic diagram of the power head in the double head gear structure injection molding worm gear assembly.
[0017] Figure 3 It is the cross section structure schematic diagram of the power head in the double head gear structure injection molding worm gear assembly.
[0018] Figure 4 It is the tooth ring and tooth groove exploded schematic diagram of the power head in the double head gear structure injection molding worm gear assembly.
[0019] Figure 5 It is the first magnet ring and second magnet ring exploded schematic diagram of the power head in the double head gear structure injection molding worm gear assembly.
[0020] In the drawing, 1, rack;2, main shaft;3, disc;4, tool holder;5, adjusting screw;6, strip-shaped connecting hole;7, connecting seat;8, guide strip;9, guide groove;10, servo motor;11, rectangular shell;12, shaft coupling;13, flange plate;14, circular boss;15, assembly groove;16, circular recess;17, fixed seat;18, moving seat;19, dovetail edge;20, air cylinder. DETAILED DESCRIPTION
[0021] The utility model discloses the specific embodiment of the following is combined with the drawings, and the technical scheme of the utility model is further described, but the utility model is not limited to these embodiments.
[0022] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in the figure, the double-head gear structure injection molding worm assembly includes a worm 1, the right side of the worm 1 is fixedly connected with a worm wheel 2, the right side of the worm wheel 2 is fixedly connected with an iron core rod 3, the left side of the iron core rod 3 respectively penetrates the worm wheel 2 and the worm 1 and extends to the outside of the worm 1, the surface of the iron core rod 3 is fixedly sleeved with a gear ring 4, the inner walls of the worm 1 and the worm wheel 2 are both provided with a gear slot 5, and the side, away from the iron core rod 3, of the gear ring 4 extends to the inner cavity of the gear slot 5.
[0023] Further, the surfaces of the iron core rod 3 are both sleeved with a threaded sleeve 6, the inner wall of the threaded sleeve 6 is threadedly connected with the outer surface of the iron core rod 3, one side of the threaded sleeve 6 is fixedly connected with a limiting disc 7, and the worm 1 and the worm wheel 2 are located between the two limiting discs 7.
[0024] The limiting disc 7 is movably sleeved on the surface of the iron core rod 3, and the left side of the worm 1 and the right side of the worm wheel 2 are both in contact with the limiting disc 7. The surface of the threaded sleeve 6 is sleeved with a limiting sleeve 8, one side of the limiting sleeve 8 is fixedly connected with a connecting ring 9, and the connecting ring 9 is movably sleeved on the surface of the iron core rod 3.
[0025] One side of the threaded sleeve 6 is fixedly connected with a first magnet ring 10, the surface of the connecting ring 9 is fixedly connected with a second magnet ring 11, and the first magnet ring 10 is attracted to the second magnet ring 11. The surface of the iron core rod 3 is provided with a guide groove 12, the inner wall of the connecting ring 9 is fixedly connected with a sliding block 13, and one side of the sliding block 13 extends to the inner cavity of the guide groove 12.
[0026] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art. The specific embodiments described in the paper are only illustrative of the spirit of the utility model. The person skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the utility model or exceed the range defined by the attached claims.
Claims
1. A dual head gear structure injection molded worm assembly comprising a worm (1) characterized by: The right side of the worm (1) is fixedly connected with a worm gear (2), the right side of the worm gear (2) is fixedly connected with an iron core rod (3), the left side of the iron core rod (3) respectively penetrates the worm gear (2) and the worm (1) and extends to the outside of the worm (1), the surface of the iron core rod (3) is fixedly sleeved with a gear ring (4), the inner walls of the worm (1) and the worm gear (2) are both provided with a gear slot (5), the side, away from the iron core rod (3), of the gear ring (4) extends to the inner cavity of the gear slot (5).
2. A dual pitch gear structure injection molded worm assembly according to claim 1, wherein: The surfaces of the iron core rod (3) are both sleeved with a threaded sleeve (6), the inner wall of the threaded sleeve (6) is threadedly connected with the outer surface of the iron core rod (3), one side of the threaded sleeve (6) is fixedly connected with a limiting disc (7), the worm (1) and the worm gear (2) are located between the two limiting discs (7).
3. A dual pitch gear structure injection molded worm assembly according to claim 2, wherein: The limiting disc (7) movably sleeves the surface of the iron core rod (3), the left side of the worm (1) and the right side of the worm gear (2) are both in contact with the limiting disc (7).
4. A dual pitch gear structure injection molded worm assembly according to claim 3, wherein: The surface of the threaded sleeve (6) is sleeved with a limiting sleeve (8), one side of the limiting sleeve (8) is fixedly connected with a connecting ring (9), the connecting ring (9) movably sleeves the surface of the iron core rod (3).
5. A dual pitch gear structure injection molded worm assembly according to claim 4, wherein: One side of the threaded sleeve (6) is fixedly connected with a first magnet ring (10), the surface of the connecting ring (9) is fixedly connected with a second magnet ring (11), the first magnet ring (10) and the second magnet ring (11) are attracted.
6. A dual pitch gear structure injection molded worm assembly according to claim 4, wherein: The surface of the iron core rod (3) is provided with a guide groove (12), the inner wall of the connecting ring (9) is fixedly connected with a sliding block (13), one side of the sliding block (13) extends to the inner cavity of the guide groove (12).