A shock-absorbing mounting structure of a urea injection control unit of an engine SCR system
By combining support rods, connecting plates, and rubber blocks, the high failure rate and poor adaptability of the urea injection control unit caused by vibration are solved, and the shock absorption and heat dissipation effects are improved, making it suitable for installation of different sizes and hole positions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI UNIV
- Filing Date
- 2025-12-04
- Publication Date
- 2026-08-04
AI Technical Summary
Traditional urea injection control units are rigidly fixed directly in the engine compartment with metal brackets, which causes vibration to be transmitted to the interior, resulting in a high failure rate of components. In addition, the differences in the size and mounting hole positions of control units for different engine models lead to low compatibility.
The shock-absorbing structure, consisting of support rods, connecting plates, and rubber blocks, combined with the adjustment design of screws and nuts, achieves horizontal and axial buffering and shock absorption. The combination of cooling fans and support bars allows for installation in different sizes and hole positions.
It reduces vibration acceleration, extends service life, improves adaptability and versatility, reduces replacement and maintenance costs, and enhances heat dissipation.
Smart Images
Figure CN224592207U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of urea injection control unit installation in engine SCR system, and more specifically, to a shock-absorbing installation structure for urea injection control unit in engine SCR system. Background Technology
[0002] SCR (Selective Catalytic Reduction) system is a purification process for nitrogen oxides (NOx) in diesel vehicle exhaust. By injecting urea solution or ammonia into the exhaust, NOx is converted into harmless nitrogen and water under the action of a catalyst. The urea injection control unit (DCU) is the "brain" of the engine SCR system, responsible for precisely controlling the amount of urea injected, the timing of injection, and the catalytic reaction process. Its working stability directly determines whether the engine exhaust emissions meet the standards. Traditional control units are often rigidly fixed directly in the engine compartment using metal brackets. Engine vibrations are directly transmitted to the inside of the control unit, leading to fatigue fracture of PCB circuit board solder joints, detachment of components such as capacitors and resistors, and a high failure rate. In addition, the size and mounting hole positions of control units vary between different engine models. Traditional mounting brackets are fixed structures that can only accommodate a single type of control unit. When replacing the engine or upgrading the control unit, a new bracket must be customized, resulting in a low compatibility rate. Therefore, a vibration-damping mounting structure for the urea injection control unit of the engine SCR system is proposed. Utility Model Content
[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a shock-absorbing mounting structure for the urea injection control unit of an engine SCR system, so as to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a shock-absorbing mounting structure for a urea injection control unit of an engine SCR system, comprising a control unit body and support rods located on both sides of the bottom of the control unit body, two connecting plates being provided between the two support rods, a support strip being fixedly connected to the top of the connecting plate, and a cooling fan being provided between the two support strips; The support rod has symmetrical adjustment holes at both ends, a screw is inserted in the middle of the adjustment hole, a limit plate is fixedly connected to the bottom of the screw, and a nut and a rubber ring are sleeved on the top of the screw. The connecting plate has upright plates fixedly connected to both ends, and multiple rubber blocks are symmetrically fixedly connected to both sides of the upright plates. A limiting ring is inserted in the middle of the upright plate, and a connecting bolt is inserted in the middle of the limiting ring. Connecting holes are symmetrically opened on both sides of the support rod.
[0005] Preferably, mounting ears are fixedly connected to the bottom perimeter of the control unit body, and the screw passes through the middle of the mounting ears.
[0006] Preferably, the nut is located on top of the rubber ring, the rubber ring is located on top of the mounting ear plate, and the nut is threadedly connected to the screw.
[0007] Preferably, the cross-sectional shape of the support rod is set to "U" shape, the size of the limiting plate is adapted to the inner cavity size of the support rod, and the limiting plate is set in the middle of the support rod.
[0008] Preferably, the two end plates of the connecting plate are located in the middle of the support rod, and one end of the rubber block is in contact with the inner wall of the support rod.
[0009] Preferably, the limiting ring corresponds to the connecting hole, and the connecting bolt passes through the middle of the connecting hole.
[0010] Preferably, the surface of the connecting plate has two second mounting holes and a fixing hole, and the surface of the support strip has a first mounting hole.
[0011] Preferably, the cross-sectional shape of the support bar is set to "U" shape, the two ends of the cooling fan extend to the middle of the support bar, and the first mounting hole corresponds one-to-one with the fixing hole.
[0012] The technical effects and advantages of this utility model are as follows: 1. This utility model firstly achieves buffering and shock absorption in the horizontal and axial directions by using the combination of rubber rings and rubber blocks, thereby reducing vibration acceleration, extending service life, and reducing replacement and maintenance costs. Furthermore, by using a screw that slides inside the adjustment hole and a connecting bolt that slides inside the connection hole, the distance between the two connecting plates can be adjusted. The screw in the middle of the adjustment hole can also be adapted to the mounting ear plates on the control unit body of different sizes for installation and use, thereby improving versatility and compatibility. 2. This utility model also features a cooling fan that can dissipate heat and cool the bottom of the control unit body, improving the heat dissipation effect of the control unit body. The cooling fan is supported and limited by a support bar, which improves the stability of the cooling fan and prevents it from shaking. The second mounting hole allows for adjustment of the mounting position of the connecting plate, making it easy to adapt to different mounting hole positions on the engine compartment and facilitating installation and fixing. In summary, through the interaction of the above-mentioned multiple functions, it can be adapted to control unit bodies of different sizes and mounting hole positions for installation and fixation, improving versatility and compatibility. At the same time, it can achieve buffering and shock absorption in the horizontal and axial directions, reduce vibration acceleration, extend service life, and reduce replacement and maintenance costs. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0014] Figure 2 This is a schematic diagram of the disassembled structure of this utility model.
[0015] Figure 3 This is a schematic diagram showing the disassembled structure of the support rod and screw of this utility model.
[0016] Figure 4 This is a schematic diagram showing the disassembled structure of the connecting plate and support strip of this utility model.
[0017] Figure 5 This utility model Figure 4 A magnified schematic diagram of the structure at point A in the middle.
[0018] The attached diagram is labeled as follows: 1. Control unit body; 2. Support rod; 3. Connecting plate; 4. Support bar; 5. Cooling fan; 6. Adjustment hole; 7. Screw; 8. Limiting plate; 9. Nut; 10. Rubber ring; 11. Mounting ear plate; 12. Rubber block; 13. Limiting ring; 14. Connecting bolt; 15. Connecting hole; 16. First mounting hole; 17. Second mounting hole; 18. Fixing hole. Detailed Implementation
[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0020] Example 1 As attached Figure 1-5 The vibration damping mounting structure of a urea injection control unit for an engine SCR system shown includes a control unit body 1 and support rods 2 located on both sides of the bottom of the control unit body 1. Two connecting plates 3 are arranged between the two support rods 2. The support rods 2 and the connecting plates 3 can form a stable frame, and the frame structure provides sufficient space for air circulation. The support rods 2 support the control unit body 1 to improve the support strength. The top of the connecting plates 3 is fixedly connected to a support bar 4. A cooling fan 5 is arranged between the two support bars 4. The support bars 4 support and limit the cooling fan 5. The cooling fan 5 can blow air onto the heat dissipation surface at the bottom of the control unit body 1 to improve the heat dissipation efficiency. The support rod 2 has symmetrical adjustment holes 6 at both ends. A screw 7 is inserted in the middle of the adjustment hole 6. A limit plate 8 is fixedly connected to the bottom of the screw 7. A nut 9 and a rubber ring 10 are fitted on the top of the screw 7. The screw 7 and the nut 9 cooperate to fix the bottom mounting ear plate 11 of the control unit body 1 to the support rod 2. The position of the screw 7 can be adjusted by sliding the screw 7 inside the adjustment hole 6, so as to adapt to the installation and use of control unit bodies 1 of different sizes. By squeezing the rubber ring 10 by the mounting ear plate 11, the rubber ring 10 can use its own elasticity to dampen the vibration along the axial direction of the screw 7, so as to avoid the vibration being directly transmitted to the control unit body 1. At the same time, by squeezing and deforming the rubber ring 10, only a small elastic movement can be generated during vibration, which not only ensures the shock absorption effect, but also avoids the installation instability caused by excessive shaking. The connecting plate 3 is fixedly connected to two vertical plates at both ends. Multiple rubber blocks 12 are symmetrically fixedly connected to both sides of the vertical plates. A limiting ring 13 is inserted in the middle of the vertical plate, and a connecting bolt 14 is inserted in the middle of the limiting ring 13. Connecting holes 15 are symmetrically opened on both sides of the support rod 2. By moving the support rod 2 horizontally, the rubber blocks 12 can be squeezed and stretched, so that the rubber blocks 12 can absorb horizontal vibration and improve the shock absorption effect. The connecting bolt 14 passes through the middle of the limiting ring 13 and the connecting hole 15 and is fastened with a nut, so that the position of the connecting plate 3 can be fixed, making it convenient to connect the connecting plate 3 to the support rod 2. By controlling the sliding of the connecting bolt 14 inside the connecting hole 15, the position of the connecting plate 3 can be easily adjusted. The limiting ring 13 improves the stability of the connection of the connecting bolt 14.
[0021] As attached Figure 1-5 As shown, mounting ear plates 11 are fixedly connected to the bottom of the control unit body 1. A screw 7 passes through the middle of the mounting ear plate 11. A nut 9 is set on the top of the rubber ring 10. The rubber ring 10 is set on the top of the mounting ear plate 11. The nut 9 is threadedly connected to the screw 7. The cross-sectional shape of the support rod 2 is set as "U". The size of the limiting plate 8 is adapted to the inner cavity size of the support rod 2. The limiting plate 8 is set in the middle of the support rod 2. The two end plates of the connecting plate 3 are located in the middle of the support rod 2. One end of the rubber block 12 is attached to the inner cavity wall of the support rod 2. The mounting ear plate 11 facilitates the screw 7 to pass through the mounting ear plate 11 and be squeezed and tightened by the nut 9. This facilitates the installation of the control unit body 1 on the support rod 2. By squeezing the rubber ring 10, the loosening is prevented and the axial vibration is buffered. The limiting plate 8 limits the screw 7, which facilitates the rotation of the nut 9 on the screw 7. By the horizontal movement of the support rod 2, the rubber block 12 is squeezed, which can achieve horizontal buffering and shock absorption, ensuring the shock absorption effect.
[0022] Example 2 Based on Embodiment 1, this embodiment also provides a vibration damping mounting structure for the urea injection control unit of an engine SCR system, as shown in the attached figure. Figure 2 , 4 As shown in Figure 5, the limiting ring 13 corresponds to the connecting hole 15, the connecting bolt 14 passes through the middle of the connecting hole 15, the surface of the connecting plate 3 has two second mounting holes 17 and a fixing hole 18, the surface of the support bar 4 has a first mounting hole 16, the cross-sectional shape of the support bar 4 is set as "U", the two ends of the cooling fan 5 extend to the middle of the support bar 4, the first mounting hole 16 and the fixing hole 18 correspond one-to-one, the position of the connecting plate 3 relative to the support rod 2 can be adjusted by sliding the connecting bolt 14 inside the connecting hole 15, it can be adapted to different mounting holes on the engine compartment for installation and fixing, the second mounting hole 17 makes it easy to install and fix the connecting plate 3 in the preset position of the engine compartment, and the cooperation of the fixing hole 18 and the first mounting hole 16 makes it easy to fix the support bar 4 and the cooling fan 5 at the top of the connecting plate 3 at the same time, which facilitates the installation and fixing of the cooling fan 5 and the support bar 4 and improves the fixing strength; It should be noted that the bolts used in this application have anti-slip grooves on one side of the nut at one end, which can achieve the fastening of the bolts and prevent loosening. In addition, each bolt has two nuts on one end: a main nut and an anti-loosening secondary nut. The tightening torque of the secondary nut is 80% of that of the main nut, forming an axial preload lock to achieve the anti-loosening effect. This is existing technology and can be set according to actual needs, so it will not be elaborated further.
[0023] The working principle of this utility model is as follows: When in use, the connecting plate 3 is installed and fixed on the engine compartment by bolts passing through the second mounting hole 17. Then, the cooling fan 5 and the support bar 4 are installed on the top of the connecting plate 3 by bolts passing through the first mounting hole 16. The connecting bolt 14 passes through the middle of the limiting ring 13 and the connecting hole 15 to connect the connecting plate 3 and the support rod 2, and the rubber block 12 is located in the middle of the support rod 2. Then, according to the position of the mounting ear plates 11 around the control unit body 1, slide the screw 7 inside the adjustment hole 6 so that the screw 7 corresponds to the mounting ear plate 11. Then, pass the screw 7 through the middle of the mounting ear plate 11, and put the rubber ring 10 and the nut 9 on the top of the screw 7 so that the nut 9 presses against the rubber ring 10 to fix the control unit body 1 on the support rod 2. Then, connect the wire of the cooling fan 5 to the engine power supply. When the engine compartment vibrates, the connecting plate 3 will squeeze the rubber block 12, which will achieve horizontal buffering and shock absorption through the rubber block 12, and axial shock absorption through the compression deformation of the rubber ring 10, which can reduce the vibration amplitude of the control unit body 1. When the control unit body 1 is started, it can control the cooling fan 5 to start synchronously to blow air and cool the bottom of the control unit body 1, thereby improving the heat dissipation effect; By sliding the screw 7 inside the adjustment hole 6, it can be adapted to install and fix support rods 2 of different sizes. By sliding the connecting bolt 14 inside the connecting hole 15, the distance between the two connecting plates 3 can be adjusted, making it convenient to adapt to the mounting holes in different positions on the engine compartment.
[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A vibration damping mounting structure for a urea injection control unit of an engine SCR system, comprising a control unit body (1) and support rods (2) located on both sides of the bottom of the control unit body (1), characterized in that: Two connecting plates (3) are provided between the two support rods (2), and a support bar (4) is fixedly connected to the top of the connecting plate (3). A cooling fan (5) is provided between the two support bars (4). The support rod (2) has symmetrical adjustment holes (6) at the top of both ends. A screw (7) is inserted in the middle of the adjustment hole (6). A limit plate (8) is fixedly connected to the bottom of the screw (7). A nut (9) and a rubber ring (10) are sleeved on the top of the screw (7). The connecting plate (3) is fixedly connected to two ends of a vertical plate, and multiple rubber blocks (12) are fixedly connected to both sides of the vertical plate. A limiting ring (13) is inserted in the middle of the vertical plate, and a connecting bolt (14) is inserted in the middle of the limiting ring (13). Connecting holes (15) are symmetrically opened on both sides of the support rod (2).
2. The vibration damping mounting structure for the urea injection control unit of an engine SCR system according to claim 1, characterized in that: The bottom of the control unit body (1) is fixedly connected with mounting ear plates (11), and the screw (7) passes through the middle of the mounting ear plates (11).
3. The vibration damping mounting structure for the urea injection control unit of an engine SCR system according to claim 2, characterized in that: The nut (9) is located on the top of the rubber ring (10), which is located on the top of the mounting ear plate (11). The nut (9) is threadedly connected to the screw (7).
4. The vibration damping mounting structure for the urea injection control unit of an engine SCR system according to claim 1, characterized in that: The cross-sectional shape of the support rod (2) is set to "U" shape, and the size of the limiting plate (8) is adapted to the inner cavity size of the support rod (2). The limiting plate (8) is set in the middle of the support rod (2).
5. The vibration damping mounting structure of the urea injection control unit of an engine SCR system according to claim 1, characterized in that: The two end plates of the connecting plate (3) are located in the middle of the support rod (2), and one end of the rubber block (12) is in contact with the inner wall of the support rod (2).
6. The vibration damping mounting structure of the urea injection control unit of an engine SCR system according to claim 1, characterized in that: The limiting ring (13) corresponds to the connecting hole (15), and the connecting bolt (14) passes through the middle of the connecting hole (15).
7. The vibration damping mounting structure for the urea injection control unit of an engine SCR system according to claim 1, characterized in that: The surface of the connecting plate (3) has two second mounting holes (17) and a fixing hole (18), and the surface of the support strip (4) has a first mounting hole (16).
8. The vibration damping mounting structure for the urea injection control unit of an engine SCR system according to claim 7, characterized in that: The cross-sectional shape of the support bar (4) is set to "U" shape, and the two ends of the cooling fan (5) extend to the middle of the support bar (4). The first mounting hole (16) corresponds to the fixing hole (18).