High-precision motor assembly for automotive steering systems
By introducing rubber connecting plates and buffer columns into the motor assembly of the automotive steering system to buffer vibration, and combining this with a heat dissipation structure to dissipate heat, the problem of loose connections caused by motor vibration is solved, thereby improving the reliability of the system and the driving experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU TANCOOM MECHANICAL & ELECTRICAL ENG
- Filing Date
- 2025-05-20
- Publication Date
- 2026-06-05
AI Technical Summary
Electric motors are prone to vibration during operation. Prolonged vibration can cause the connection with the housing to loosen, affecting the reliability of the steering system and the driving experience.
The system employs components such as a positioning and mounting housing, a gear reducer, a reciprocating self-locking drive component, a rubber connecting plate, a rubber buffer column, a buffer structure, a heat dissipation structure, and a positioning and mounting plate. Vibration is buffered by the rubber connecting plate and buffer column, heat is dissipated by the heat dissipation structure, dust is prevented from entering, and the system reliability and accuracy are improved.
It effectively reduces connection loosening caused by vibration, improves the reliability of the steering system and driving experience, extends the service life of the rubber buffer column, and ensures transmission accuracy and overall performance.
Smart Images
Figure CN224329308U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of motor assembly technology, and more specifically, it relates to a high-precision automotive steering system motor assembly. Background Technology
[0002] The automotive steering system motor assembly typically consists of an electric motor, a reducer, sensors, an electronic control unit (ECU), and a housing. When the driver turns the steering wheel, a high-precision torque sensor accurately detects the torque change on the steering wheel, while a high-precision angle sensor measures the steering wheel's rotation angle. The vehicle speed sensor transmits the vehicle's speed information to the ECU. Based on the signals from these sensors, the ECU calculates the required steering assist amount and direction, and then sends corresponding control signals to the electric motor. Upon receiving the control signals, the electric motor generates corresponding torque, which is amplified and its speed reduced by a gear reducer, ultimately transmitting the assist to the steering mechanism. This helps the driver turn the steering wheel more easily and precisely, enabling vehicle steering.
[0003] For example, CN218021808U discloses a motor assembly with a controller, an automotive steering system, and an automotive vehicle. The motor assembly with a controller includes a controller cover, a PCBA board, connectors, an angle magnet, and the motor assembly. The controller cover is mounted on the rear end cover of the motor assembly to form a receiving space based on the controller cover and the rear end cover of the motor assembly. The PCBA board is fixed to the rear end cover of the motor assembly, the connectors are welded to the PCBA board, and the angle magnet is mounted on the rotation shaft of the motor assembly. By applying the technical solution of this utility model, the problems of complex installation process, large space occupation, and inconvenient assembly of electric power steering systems can be solved, thereby optimizing the overall structure and making the steering system structure simpler and more compact.
[0004] Based on the above, the electric motor is usually fixed to the housing with bolts. The electric motor is prone to vibration when it is working. Long-term vibration can cause the connection between the electric motor and the housing to loosen, which in turn affects the reliability of the steering system and the driving experience. Utility Model Content
[0005] To address the aforementioned technical problems, this utility model provides a high-precision automotive steering system motor assembly. This addresses the issue that motors are typically fixed to the housing with bolts, which can easily cause vibrations during operation. Prolonged vibration can lead to loosening of the connection between the motor and the housing, thereby affecting the reliability of the steering system and the driving experience.
[0006] The purpose and effect of this high-precision automotive steering system motor assembly are achieved by the following specific technical means:
[0007] A high-precision automotive steering system motor assembly includes a positioning and mounting housing, a gear reducer, a reciprocating self-locking drive component, rubber connecting plates, a positioning connecting plate, rubber buffer pillars, a buffer structure, a heat dissipation structure, and a positioning and mounting plate. The gear reducer is bolted to the upper part of the positioning and mounting housing; the reciprocating self-locking drive component is bolted to the lower part of the gear reducer; the heat dissipation structure is disposed on the inner side of the positioning and mounting housing; the positioning and mounting plate is fixedly connected to the inner side of the positioning and mounting housing; multiple rubber connecting plates are provided, and the multiple rubber connecting plates are evenly distributed and bonded to the inner side of the positioning and mounting housing; multiple positioning connecting plates are provided, and the multiple positioning connecting plates are evenly distributed and fixedly connected to the inner side of the multiple rubber connecting plates; multiple rubber buffer pillars are provided, and the multiple rubber buffer pillars are respectively fixedly connected to the inner side of the multiple positioning connecting plates; the buffer structure is disposed on the inner side of the positioning and mounting housing.
[0008] Furthermore, the heat dissipation structure includes a transmission mounting shaft and a transmission threaded sleeve; two transmission mounting shafts are provided, and the two transmission mounting shafts are rotatably connected to the upper and lower sides of the positioning mounting housing respectively, and both transmission mounting shafts are elastically connected to the positioning mounting housing through a spiral spring; four transmission threaded sleeves are provided, and the four transmission threaded sleeves are fixedly connected to the left and right sides of the two transmission mounting shafts respectively.
[0009] Furthermore, the heat dissipation structure also includes a transmission connecting plate and a sliding sealing plate; four transmission connecting plates are provided, and the four transmission connecting plates are respectively threaded to the outside of four transmission threaded sleeves; two sliding sealing plates are provided, and the two sliding sealing plates are respectively slidably connected to the left and right sides of the positioning and mounting housing, the left sliding sealing plate is fixedly connected to the two left transmission connecting plates, and the right sliding sealing plate is fixedly connected to the two right transmission connecting plates.
[0010] Furthermore, the heat dissipation structure also includes a wind-driven fan and a heat dissipation fan; two wind-driven fans are provided, and the two wind-driven fans are respectively fixedly connected to the middle of the two transmission mounting shafts; two heat dissipation fans are provided, and the two heat dissipation fans are respectively bolted to the upper and lower sides of the positioning mounting plate.
[0011] Furthermore, the heat dissipation structure also includes position limiting push plates and first reset elastic elements; four position limiting push plates are provided, and the four position limiting push plates are slidably connected to the outside of the two transmission mounting shafts respectively; four first reset elastic elements are provided, and the four position limiting push plates are elastically connected to the two wind-driven fans through the four first reset elastic elements.
[0012] Furthermore, the buffer structure includes heat dissipation through holes and positioning adhesive stickers; multiple heat dissipation through holes are provided, and the multiple heat dissipation through holes are evenly distributed and opened on the inner side of the multiple rubber connecting plates; multiple positioning adhesive stickers are provided, and the multiple positioning adhesive stickers are evenly distributed and fixedly connected to the outer side of the multiple rubber connecting plates.
[0013] Furthermore, the buffer structure also includes auxiliary support springs and reinforcing fiber filaments; multiple auxiliary support springs are provided, and the multiple auxiliary support springs are respectively provided on the outside of the multiple rubber buffer pillars; multiple reinforcing fiber filaments are provided, and the multiple reinforcing fiber filaments are evenly distributed on the outside of the multiple rubber buffer pillars.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] This invention utilizes a heat dissipation fan to expel heat from the positioning and mounting housing, effectively improving the heat dissipation of the reciprocating self-locking drive component and preventing damage due to overheating. The fan's movement alters the position of the sliding sealing plate, controlling the opening and closing of the air outlet. This effectively prevents dust from entering the positioning and mounting housing when no hot air is being expelled, thus avoiding dust accumulation on the drive component and extending its lifespan. Rubber connecting plates, positioning connecting plates, and rubber buffer pillars buffer the vibrations generated during operation, effectively reducing vibrations to the positioning and mounting housing and minimizing loosening at the drive component connections. This ensures the reliability of the steering system and the driving experience, guaranteeing the performance of the automotive steering system motor assembly and preventing transmission accuracy issues caused by loose connections. Furthermore, auxiliary support springs and reinforcing fibers reduce plastic deformation of the rubber buffer pillars after prolonged use, effectively extending their lifespan. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0017] Figure 2 This is a schematic diagram showing the positional relationship between the reciprocating self-locking drive component, the rubber connecting plate, and the positioning mounting plate of this utility model.
[0018] Figure 3 This is a schematic diagram showing the positional relationship between the positioning mounting plate and the sliding sealing plate of this utility model.
[0019] Figure 4 This is a schematic diagram showing the positional relationship between the transmission mounting shaft, transmission threaded sleeve, transmission connecting plate, and sliding sealing plate of this utility model.
[0020] Figure 5 This is a schematic diagram of the structure of the rubber connecting plate and rubber buffer column of this utility model.
[0021] Figure 6 This is a structural schematic diagram of the positioning connecting plate and rubber buffer column of this utility model.
[0022] In the diagram, the correspondence between component names and drawing numbers is as follows:
[0023] 1. Positioning and mounting housing; 101. Transmission mounting shaft; 102. Transmission threaded sleeve; 103. Transmission connecting plate; 104. Sliding sealing plate; 105. Wind-driven fan; 106. Position limiting push plate; 107. First reset elastic element; 2. Gear reducer; 3. Reciprocating self-locking drive element; 4. Rubber connecting plate; 401. Heat dissipation through hole; 402. Positioning adhesive sticker; 5. Positioning connecting plate; 501. Auxiliary support spring; 6. Rubber buffer column; 601. Reinforcing fiber filament; 7. Positioning and mounting plate; 701. Heat dissipation fan. Detailed Implementation
[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. Example 1
[0025] As attached Figure 1 To be continued Figure 4 As shown:
[0026] This utility model provides a high-precision automotive steering system motor assembly, including a positioning and mounting housing 1, a gear reducer 2, a reciprocating self-locking drive component 3, a heat dissipation structure, and a positioning and mounting plate 7; the gear reducer 2 is bolted to the upper part of the positioning and mounting housing 1; the reciprocating self-locking drive component 3 is bolted to the lower part of the gear reducer 2; the heat dissipation structure is disposed on the inner side of the positioning and mounting housing 1; and the positioning and mounting plate 7 is fixedly connected to the inner side of the positioning and mounting housing 1.
[0027] The heat dissipation structure includes a transmission mounting shaft 101 and a transmission threaded sleeve 102. There are two transmission mounting shafts 101, which are rotatably connected to the upper and lower sides of the positioning mounting housing 1, respectively. Both transmission mounting shafts 101 are elastically connected to the positioning mounting housing 1 through a spiral spring. There are four transmission threaded sleeves 102, which are fixedly connected to the left and right sides of the two transmission mounting shafts 101, respectively.
[0028] The heat dissipation structure also includes a transmission connecting plate 103 and a sliding sealing plate 104. There are four transmission connecting plates 103, which are threadedly connected to the outside of four transmission threaded sleeves 102 respectively. There are two sliding sealing plates 104, which are slidably connected to the left and right sides of the positioning and mounting housing 1 respectively. The left sliding sealing plate 104 is fixedly connected to the two left transmission connecting plates 103, and the right sliding sealing plate 104 is fixedly connected to the two right transmission connecting plates 103.
[0029] The heat dissipation structure also includes a wind-driven fan 105 and a heat dissipation fan 701; there are two wind-driven fans 105, which are fixedly connected to the middle of two transmission mounting shafts 101 respectively; there are two heat dissipation fans 701, which are bolted to the upper and lower sides of the positioning mounting plate 7 respectively.
[0030] The heat dissipation structure also includes position limiting push plates 106 and first reset elastic elements 107; four position limiting push plates 106 are provided, and the four position limiting push plates 106 are slidably connected to the outside of the two transmission mounting shafts 101 respectively; four first reset elastic elements 107 are provided, and the four position limiting push plates 106 are elastically connected to the two wind-driven fans 105 through the four first reset elastic elements 107.
[0031] The specific usage and function of this embodiment: When assembling the automotive steering system motor assembly, first fix the reciprocating self-locking drive 3 to the lower part of the gear reduction box 2, and then fix the gear reduction box 2 to the upper part of the positioning and mounting housing 1 with bolts to complete the assembly. When the reciprocating self-locking drive 3 is working, the heat dissipation fan 701 installed on the positioning and mounting plate 7 starts, blowing the heat generated by the reciprocating self-locking drive 3 out of the positioning and mounting housing 1. At this time, the wind-driven fan 105 drives the transmission mounting shaft 101 and the transmission threaded sleeve 102 to rotate under the blowing of hot air. When the transmission threaded sleeve 102 rotates, it will cause the transmission connecting plate 103 to drive the sliding sealing plate 104 to slide towards the middle. At this time, the positioning and mounting... The air outlet of housing 1 is no longer blocked, and the hot air inside the positioning and mounting housing 1 can be discharged smoothly. After the transmission connecting plate 103 passes the transmission threaded sleeve 102, the still rotating transmission threaded sleeve 102 will push the transmission connecting plate 103 to continuously squeeze the position limiting push plate 106. After the heat dissipation fan 701 is turned off, the wind-driven fan 105 is no longer driven by airflow. At this time, the spiral spring drives the transmission mounting shaft 101 and the wind-driven fan 105 to reverse. The first reset elastic element 107 will apply pressure to the transmission connecting plate 103, so that the transmission connecting plate 103 resets along the transmission threaded sleeve 102. At this time, the sliding sealing plate 104 will block the inside of the air outlet to prevent external dust from entering the positioning and mounting housing 1. Example 2
[0032] As attached Figure 2 To be continued Figure 6 As shown:
[0033] Based on Embodiment 1, it also includes a rubber connecting plate 4, a positioning connecting plate 5, a rubber buffer column 6, and a buffer structure; multiple rubber connecting plates 4 are provided, and multiple rubber connecting plates 4 are evenly distributed and bonded to the inner side of the positioning and mounting housing 1; multiple positioning connecting plates 5 are provided, and multiple positioning connecting plates 5 are evenly distributed and fixedly connected to the inner side of multiple rubber connecting plates 4; multiple rubber buffer columns 6 are provided, and multiple rubber buffer columns 6 are respectively fixedly connected to the inner side of multiple positioning connecting plates 5; the buffer structure is provided on the inner side of the positioning and mounting housing 1.
[0034] The buffer structure includes heat dissipation through holes 401 and positioning adhesive stickers 402; multiple heat dissipation through holes 401 are provided, and the multiple heat dissipation through holes 401 are evenly distributed and opened on the inner side of multiple rubber connecting plates 4; multiple positioning adhesive stickers 402 are provided, and the multiple positioning adhesive stickers 402 are evenly distributed and fixedly connected to the outer side of multiple rubber connecting plates 4.
[0035] The buffer structure also includes auxiliary support springs 501 and reinforcing fiber filaments 601; multiple auxiliary support springs 501 are provided, and multiple auxiliary support springs 501 are respectively provided on the outside of multiple rubber buffer pillars 6; multiple reinforcing fiber filaments 601 are provided, and multiple reinforcing fiber filaments 601 are evenly distributed on the outside of multiple rubber buffer pillars 6.
[0036] The specific usage and function of this embodiment are as follows: Before placing the reciprocating self-locking drive 3 into the positioning and mounting housing 1, the rubber connecting plate 4 is first bonded to the outside of the reciprocating self-locking drive 3 using the positioning adhesive 402. After placing the reciprocating self-locking drive 3 into the positioning and mounting housing 1, the positioning adhesive 402 on the other side of the rubber connecting plate 4 will bond the rubber connecting plate 4 to the inside of the positioning and mounting housing 1. The heat generated when the reciprocating self-locking drive 3 is working can be dissipated to the outside of the rubber connecting plate 4 through the heat dissipation hole 401. The vibration generated when the reciprocating self-locking drive 3 is working will pass through the rubber connecting plate 4, the positioning connecting plate 5 and the rubber buffer column 6 in sequence. After being buffered by the rubber buffer column 6, it can be transmitted to the positioning and mounting housing 1. The auxiliary support spring 501 and the reinforcing fiber 601 can reduce the plastic deformation generated by the rubber buffer column 6 after long-term use.
[0037] The following points should be noted in this article:
[0038] 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.
[0039] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.
[0040] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.
Claims
1. A high-precision automotive steering system motor assembly, comprising a positioning and mounting housing (1), a gear reducer (2), a reciprocating self-locking drive component (3), a rubber connecting plate (4), a positioning connecting plate (5), a rubber buffer column (6), a buffer structure, a heat dissipation structure, and a positioning and mounting plate (7); the gear reducer (2) is bolted to the upper part of the positioning and mounting housing (1); the reciprocating self-locking drive component (3) is bolted to the lower part of the gear reducer (2); characterized in that: The heat dissipation structure is disposed on the inner side of the positioning and mounting housing (1); the positioning and mounting plate (7) is fixedly connected to the inner side of the positioning and mounting housing (1); multiple rubber connecting plates (4) are disposed, and multiple rubber connecting plates (4) are evenly distributed and bonded to the inner side of the positioning and mounting housing (1); multiple positioning connecting plates (5) are disposed, and multiple positioning connecting plates (5) are evenly distributed and fixedly connected to the inner side of multiple rubber connecting plates (4); multiple rubber buffer pillars (6) are disposed, and multiple rubber buffer pillars (6) are respectively fixedly connected to the inner side of multiple positioning connecting plates (5); the buffer structure is disposed on the inner side of the positioning and mounting housing (1).
2. The high-precision automotive steering system motor assembly as described in claim 1, characterized in that: The heat dissipation structure includes a transmission mounting shaft (101) and a transmission threaded sleeve (102); there are two transmission mounting shafts (101), which are rotatably connected to the upper and lower sides of the positioning mounting housing (1), respectively, and both transmission mounting shafts (101) are elastically connected to the positioning mounting housing (1) through a spiral spring; there are four transmission threaded sleeves (102), which are fixedly connected to the left and right sides of the two transmission mounting shafts (101).
3. The high-precision automotive steering system motor assembly as described in claim 2, characterized in that: The heat dissipation structure also includes a transmission connecting plate (103) and a sliding sealing plate (104); four transmission connecting plates (103) are provided, and the four transmission connecting plates (103) are respectively threaded to the outside of the four transmission threaded sleeves (102); two sliding sealing plates (104) are provided, and the two sliding sealing plates (104) are respectively slidably connected to the left and right sides of the positioning and mounting housing (1), the left sliding sealing plate (104) is fixedly connected to the two left transmission connecting plates (103), and the right sliding sealing plate (104) is fixedly connected to the two right transmission connecting plates (103).
4. The high-precision automotive steering system motor assembly as described in claim 3, characterized in that: The heat dissipation structure also includes a wind-driven fan (105) and a heat dissipation fan (701); there are two wind-driven fans (105), which are fixedly connected to the middle of the two transmission mounting shafts (101); there are two heat dissipation fans (701), which are bolted to the upper and lower sides of the positioning mounting plate (7).
5. The high-precision automotive steering system motor assembly as described in claim 4, characterized in that: The heat dissipation structure further includes a position limiting push plate (106) and a first reset elastic member (107); four position limiting push plates (106) are provided, and the four position limiting push plates (106) are slidably connected to the outside of the two transmission mounting shafts (101); four first reset elastic members (107) are provided, and the four position limiting push plates (106) are elastically connected to the two wind-driven fans (105) through the four first reset elastic members (107).
6. The high-precision automotive steering system motor assembly as described in claim 1, characterized in that: The buffer structure includes heat dissipation through holes (401) and positioning adhesive stickers (402); multiple heat dissipation through holes (401) are provided, and the multiple heat dissipation through holes (401) are evenly distributed and opened on the inner side of multiple rubber connecting plates (4); multiple positioning adhesive stickers (402) are provided, and the multiple positioning adhesive stickers (402) are evenly distributed and fixedly connected to the outer side of multiple rubber connecting plates (4).
7. The high-precision automotive steering system motor assembly as described in claim 6, characterized in that: The buffer structure also includes auxiliary support springs (501) and reinforcing fiber filaments (601); multiple auxiliary support springs (501) are provided, and multiple auxiliary support springs (501) are respectively provided on the outside of multiple rubber buffer pillars (6); multiple reinforcing fiber filaments (601) are provided, and multiple reinforcing fiber filaments (601) are evenly distributed on the outside of multiple rubber buffer pillars (6).