Refueling hole sealing structure, transmission, and vehicle
Patent Information
- Application Number
- CN202522612826.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-12-09
AI Technical Summary
[0004]有鉴于此，本申请实施例提供一种加注孔密封结构、变速器以及车辆，以解决塑料螺塞容易松脱的技术问题
[0029]本申请提供的车辆通过采用上述的变速器，使得车辆的制造成本低，且车辆的使用性能较好。
Smart Images
Figure CN224871876U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle component technology, and in particular to a filling hole sealing structure, a transmission, and a vehicle. Background Technology
[0002] Currently, many key components in automobiles, such as engines and transmissions, are designed with filling ports to meet the needs of these components for adding corresponding fluids (such as lubricants) during after-sales repairs and routine maintenance.
[0003] In related technologies, to prevent the filled liquid from leaking from the filling hole, a plug is usually inserted into the filling hole for sealing. The plugs are mainly made of steel or high-strength plastic. However, steel plugs are more expensive, which is not conducive to companies achieving cost reduction and efficiency improvement goals; while plastic plugs are cheaper, their strength is relatively poor and they cannot withstand excessive tightening force. This causes plastic plugs to easily loosen due to vibration and other factors during vehicle operation, thus affecting vehicle driving safety. Utility Model Content
[0004] In view of this, embodiments of this application provide a filling hole sealing structure, a transmission, and a vehicle to solve the technical problem of easy loosening of plastic plugs.
[0005] In a first aspect, this application provides a filling hole sealing structure, which includes: The boss includes a first side surface, which is provided with an injection hole and an anti-detachment groove, the anti-detachment groove being located around the injection hole; A screw plug includes a screw head and a screw rod. The screw head has a second side surface. One end of the screw rod is connected to the second side surface. The second side surface is provided with a relief groove and an elastic snap-fit member. The first end of the elastic snap-fit member is connected to the inner wall surface of the relief groove, and the second end of the elastic snap-fit member extends at least partially out of the relief groove. The screw is used to engage with the filling hole threadedly so that the second side contacts the first side, and the second end of the elastic snap-fit is engaged with the anti-loosening groove to prevent the plug from loosening.
[0006] Thus, when the screw is threaded into the filling hole, rotating the screw in the positive direction allows it to gradually extend into the filling hole, and the second side gradually approaches the first side until the second side contacts the first side. At this point, the plug and the filling hole are tightened, and the second side can abut against the first side, thereby sealing the filling hole and preventing the filled liquid from leaking out. Furthermore, the second end of the elastic locking component engages with the anti-disengagement groove, preventing the plug from rotating in the opposite direction, which is the direction for loosening the plug. This prevents the plug from coming loose from the filling hole and avoids the plastic plug coming loose due to vibrations generated during vehicle operation.
[0007] More specifically, as the plug is gradually tightened, the elastic locking element contacts the first side. As the screw gradually extends into the filling hole, the distance between the second side and the first side gradually decreases. When the distance between the second side and the first side is too small to accommodate the portion of the second end of the elastic locking element extending out of the relief groove, the first side can press the second end of the elastic locking element into the relief groove, so that the second end of the elastic locking element will not interfere with the tightening process of the plug. That is, the second end of the elastic locking element will not prevent the second side from gradually approaching the first side. When the plug is tightened, the second end of the elastic locking element is positioned opposite to the anti-disengagement groove. At this time, under the elastic force of the elastic locking element, the second end of the elastic locking element can extend out of the relief groove and engage in the anti-disengagement groove, thereby restricting the plug from rotating in the opposite direction and preventing the plug from coming loose from the filling hole.
[0008] In addition, since the plug is made of plastic, it has a certain degree of elasticity. Although the elasticity of the plug is relatively weak, it still has a certain deformation allowance as it is gradually tightened. Even if the plug is tightened to the point where the second side contacts the first side, if the second end of the elastic snap-fit is not yet engaged in the anti-disengagement groove, the plug can still be tightened a little more to ensure that the second end of the elastic snap-fit can be engaged in the anti-disengagement groove.
[0009] As an optional implementation, the screw is threaded into the filling hole, and the screw has a tightened position and a loosened position arranged axially along the filling hole; When the screw is in the released position, there is a first distance between the second side and the first side, and the second end of the elastic snap-fit member leaves the anti-dislodgement groove. When the screw is in the tightened position, the second side contacts the first side, and the second end of the elastic snap-fit is engaged with the anti-disengagement groove to restrict the screw from moving to the loosened position.
[0010] Thus, when the screw is in the loosened position, there is a first distance between the second side and the first side. At this time, the second end of the elastic snap-fit is not in contact with the first side, and the second end of the elastic snap-fit leaves the anti-disengagement groove, so the screw plug can be easily turned.
[0011] Continuing to rotate the screw in the positive direction will drive it to the tightened position. At this point, the second side contacts the first side, or in other words, the second side abuts against the first side, thereby sealing the filling hole and preventing the filled liquid from leaking out of the filling hole. In addition, the second end of the elastic snap-fit part engages with the anti-dislodgement groove, which can prevent the plug from rotating in the opposite direction and prevent the plug from coming loose from the filling hole, thus avoiding the plastic plug from coming loose due to vibrations generated when the vehicle is running.
[0012] As an optional implementation, the inner surface of the anti-detachment groove includes a first guide surface and a first abutting surface disposed opposite to each other; When the screw switches from the loose position to the tighten position, the first guide surface slides in contact with the second end of the elastic snap-fit member, and the first guide surface is used to guide the second end of the elastic snap-fit member away from the anti-disengagement groove. When the screw is in the tightened position, the first abutting surface abuts against the second end of the elastic snap-fit member to restrict the screw from switching from the tightened position to the loosened position.
[0013] Thus, as the screw is rotated in the positive direction, driving it from the loose position to the tightened position, the second end of the elastic locking component will slide into contact with the first side. As the screw continues to rotate in the positive direction, the second end of the elastic locking component will enter the anti-disengagement groove, and the first guide surface will slide into contact with the second end of the elastic locking component. The first guide surface can guide the second end of the elastic locking component to leave the anti-disengagement groove, thereby preventing the second end of the elastic locking component from obstructing the screw from rotating in the positive direction, and thus the screw can be smoothly switched from the loose position to the tightened position.
[0014] When the screw is in the tightened position, the first abutting surface abuts against the second end of the elastic locking member. The first abutting surface can prevent the second end of the elastic locking member from leaving the anti-disengagement groove, thereby preventing the screw from rotating in the opposite direction. This limits the screw from switching from the tightened position to the loosened position, ensuring that the screw plug can be stably assembled in the filling hole. Even if the vehicle vibrates while driving, the screw plug is not easy to come loose from the filling hole.
[0015] As an optional implementation, the second end of the elastic snap-fit member has a snap-fit connector, which includes a second guide surface and a second abutment surface disposed opposite to each other; When the screw switches from the loosened position to the tightened position, the second guide surface slides into contact with the first guide surface to guide the snap-fit connector away from the anti-disengagement groove. When the screw is in the tightened position, the second abutting surface abuts against the first abutting surface to restrict the screw from switching from the tightened position to the loosened position.
[0016] Thus, during the process of rotating the screw in the positive direction to switch it from the loose position to the tight position, the snap-fit connector will be squeezed by the first side, causing it to retract into the relief groove. When the snap-fit connector is aligned with the anti-disengagement groove, under the action of the elastic snap-fit component's own elasticity, the snap-fit connector extends into the anti-disengagement groove. As the screw continues to rotate in the positive direction, the second guide surface of the snap-fit connector will slide into contact with the first guide surface, and under the guidance of the first guide surface, the snap-fit connector can leave the anti-disengagement groove, allowing the screw to rotate smoothly in the positive direction. This makes it very convenient to switch the screw from the loose position to the tight position.
[0017] When the screw is in the tightened position, the first abutting surface and the second abutting surface abut against each other, which can better prevent the snap-fit connector from leaving the anti-disengagement groove, thereby preventing the screw from rotating in the opposite direction and further restricting the screw from switching from the tightened position to the loosened position, making it difficult for the screw plug to come off from the filling hole.
[0018] As an optional implementation, the screw has a first threaded structure on its circumferential side, and the filling hole sealing structure further includes a sealing ring, which is sleeved on the screw and located between the first threaded structure and the screw head; The screw is inserted into the filling hole, the first thread structure is threadedly engaged with the filling hole, and the sealing ring is used to seal the gap between the screw and the inner wall surface of the filling hole.
[0019] Thus, when the screw is in the tightened position, the sealing ring is squeezed between the screw and the inner wall of the filling hole, and the sealing ring can also abut against the second side, so that the sealing ring can seal the gap between the inner wall of the filling hole and the screw plug, which can further increase the sealing performance of the filling hole.
[0020] As an optional implementation, the screw is further provided with a mounting groove on its circumferential side. The mounting groove extends around the circumference of the screw and is located between the first threaded structure and the screw head. The sealing ring is installed in the mounting groove.
[0021] In this way, the sealing ring can be stably installed on the screw, and when the screw is inserted into the filling hole and the inner wall of the filling hole squeezes the sealing ring, the mounting groove can restrict the movement of the sealing ring. Thus, even if the sealing ring is squeezed and deformed, the position of the sealing ring is still between the first thread structure and the screw head, ensuring that the sealing ring can seal the gap between the inner wall of the filling hole and the screw plug.
[0022] As an optional implementation, the screw head has a third side surface, which is disposed opposite to the second side surface, and the third side surface is provided with a wrench interface.
[0023] In this way, the wrench can be matched with the wrench interface, and the screw plug can be turned easily by turning the wrench.
[0024] As an optional implementation, the first side is provided with multiple sets of anti-detachment groove groups, which are arranged around the axis of the filling hole. Each set of anti-detachment groove groups includes multiple anti-detachment grooves, which are arranged around the axis of the filling hole.
[0025] Thus, when the screw is in the tightened position, the clamp can engage with one of the multiple anti-disengagement grooves to prevent the screw from rotating in the opposite direction. Therefore, during the process of the screw switching from the loosened position to the tightened position, the clamp can selectively engage with one of the multiple anti-disengagement grooves, which can avoid the situation where the first side and the second side have already made contact, but the clamp is not engaged with the anti-disengagement groove.
[0026] Secondly, this application also provides a transmission, including a housing and the above-mentioned filling hole sealing structure, the housing having a receiving cavity, the boss being disposed on the housing, and the filling hole communicating with the receiving cavity.
[0027] In this way, lubricant can be injected into the receiving cavity from the filling hole, and the screw plug can be threaded into the filling hole and tightened to the tightened position, thereby sealing the filling hole, preventing lubricant from leaking from the filling hole, and preventing the screw plug from coming loose from the filling hole, thus avoiding the screw plug coming loose due to vibration generated during vehicle operation.
[0028] Thirdly, this application also provides a vehicle, including a body and the aforementioned transmission, wherein the transmission is mounted on the body.
[0029] The vehicle provided in this application, by employing the aforementioned transmission, achieves low manufacturing costs and good performance. Attached Figure Description
[0030] Figure 1 This is a three-dimensional structural diagram of a filling hole sealing structure provided in an embodiment of this application; Figure 2 This is a three-dimensional structural diagram of the screw plug provided in an embodiment of this application; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 A three-dimensional structural diagram of the boss provided in an embodiment of this application; Figure 5 A simplified schematic diagram of the anti-detachment structure provided in the embodiments of this application; Figure 6 This is a simplified schematic diagram of the structure of the elastic snap-fit connector connected to the clearance groove according to an embodiment of this application; Figure 7 This is a cross-sectional structural diagram of the screw plug provided in an embodiment of this application.
[0031] Explanation of reference numerals in the attached figures: 1. Boss; 11. First side surface; 12. Filling hole; 13. Anti-detachment groove; 131. First guide surface; 132. First abutment surface; 14. Anti-detachment groove assembly; 2. Plug; 21. Plug head; 211. Second side surface; 212. Clearance groove; 213. Elastic snap-fit component; 214. Snap-fit connector; 2141. Second guide surface; 2142. Second abutment surface; 215. Third side surface; 216. Wrench interface; 22. Threaded rod; 221. First thread structure; 222. Mounting groove; 3. Sealing ring. Detailed Implementation
[0032] The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.
[0033] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
[0034] Currently, many key components in automobiles, such as engines and transmissions, are designed with filling ports to meet the needs of these components for adding corresponding fluids (such as lubricants) during after-sales repairs and routine maintenance.
[0035] In related technologies, to prevent the added liquid from leaking from the filling hole, a screw plug is usually inserted into the filling hole for sealing. The screw plug is mainly made of steel or plastic, as detailed below: From a cost perspective, steel screw plugs have a higher overall cost due to a combination of factors, including raw material costs and processing costs. For companies producing a large number of automotive parts and equipping them with corresponding screw plugs, using steel screw plugs increases production costs, which contradicts the company's goal of reducing costs, increasing efficiency, enhancing product competitiveness, and increasing profit margins.
[0036] Plastic plugs have a relatively low raw material cost, giving them a cost advantage. However, the physical properties of plastic mean that its strength is relatively lower than that of steel. This means that plastic plugs cannot withstand excessive tightening force. If the tightening force exceeds the plastic plug's tolerance when screwing it into the filling hole, it may damage the plug. Therefore, plastic plugs cannot be installed in the filling hole with the same high tightening force as steel plugs, resulting in a lower tightness between the plastic plug and the filling hole compared to steel plugs.
[0037] Furthermore, vehicles inevitably experience continuous vibrations during operation. These vibrations exert forces on the filler plugs. Because plastic filler plugs are not as tight as steel plugs, they are more prone to loosening under prolonged vibration. Once a plastic plug loosens, the seal of the filler hole is compromised, and the filled fluid may leak out. For critical components such as the engine and transmission, fluid leakage can affect their normal lubrication and cooling functions, thereby impacting the vehicle's driving performance.
[0038] Based on this, this application provides a filling hole sealing structure, a transmission, and a vehicle. The filling hole sealing structure includes a boss 1 and a plug 2. The first side 11 of the boss 1 is provided with a filling hole 12 and an anti-detachment groove 13. The plug 2 is a plastic plug 2, which includes a screw 22 and a screw head 21. The second side 211 of the screw head 21 is provided with a relief groove 212 and an elastic snap-fit member 213. When the screw 22 is threadedly engaged with the filling hole 12, and the plug 2 is tightened to the filling hole 12 until the second side 211 contacts the first side 11, the second end of the elastic snap-fit member 213 snaps into the anti-detachment groove 13, which can prevent the plug 2 from rotating in the direction of loosening, thereby preventing the plug 2 from coming loose from the filling hole 12 and avoiding the plastic plug 2 from coming loose due to vibration generated during vehicle operation.
[0039] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific implementation details.
[0040] like Figures 1 to 4This application provides a filling hole sealing structure, which includes a boss 1 and a screw plug 2. The boss 1 includes a first side surface 11, which has a filling hole 12 and an anti-detachment groove 13. The anti-detachment groove 13 is located on the periphery of the filling hole 12. The screw plug 2 includes a screw head 21 and a screw rod 22. The screw head 21 has a second side surface 211. One end of the screw rod 22 is connected to the second side surface 211. The second side surface 211 has a relief groove 212 and an elastic snap-fit member 213. The first end of the elastic snap-fit member 213 is connected to the inner wall surface of the relief groove 212, and the second end of the elastic snap-fit member 213 extends at least partially out of the relief groove 212. The screw rod 22 is used to thread into the filling hole 12 so that the second side surface 211 contacts the first side surface 11, and the second end of the elastic snap-fit member 213 snaps into the anti-detachment groove 13 to prevent the screw plug 2 from loosening.
[0041] It should be noted that the boss 1 is a component that forms the filling hole 12. Specifically, the boss 1 can be a part of an automobile component such as an engine or transmission that has a filling hole 12. The boss 1 includes a first side surface 11, which is a plane. The first side surface 11 has a filling hole 12 and an anti-detachment groove 13. The anti-detachment groove 13 is located on the periphery of the filling hole 12, and the groove depth direction of the anti-detachment groove 13 is perpendicular to the first side surface 11.
[0042] The screw plug 2 is made of plastic, and the screw head 21 and the screw rod 22 are integrally injection molded. The screw head 21 has a second side surface 211, which is flat. One end of the screw rod 22 is connected to the second side surface 211. The second side surface 211 is provided with a relief groove 212 and an elastic snap-fit member 213. The relief groove 212 is located on the periphery of the screw rod 22 and extends along the circumference of the screw rod 22. The first end of the elastic snap-fit member 213 is connected to the inner wall surface of the relief groove 212. The elastic snap-fit member 213 also extends along the circumference of the screw rod 22, and the second end of the elastic snap-fit member 213 extends at least partially out of the relief groove 212.
[0043] When the screw 22 is threaded into the filling hole 12, the screw 22 is rotated in the positive direction, so that the screw 22 can gradually extend into the filling hole 12, and the second side 211 can gradually approach the first side 11 until the second side 211 contacts the first side 11. At this time, the plug 2 and the filling hole 12 are in a tightened state. At this time, the second side 211 can abut against the first side 11, thereby sealing the filling hole 12 and preventing the filled liquid from leaking from the filling hole 12. In addition, the second end of the elastic snap-fit member 213 snaps into the anti-disengagement groove 13, which can prevent the plug 2 from rotating in the opposite direction. The opposite direction is the direction of loosening the plug 2, thereby preventing the plug 2 from coming loose from the filling hole 12 and avoiding the plastic plug 2 from coming loose due to vibration generated when the vehicle is running.
[0044] More specifically, as the plug 2 is gradually tightened, the elastic retaining member 213 will contact the first side 11. As the screw 22 gradually extends into the filling hole 12, the distance between the second side 211 and the first side 11 gradually decreases. When the distance between the second side 211 and the first side 11 is too small to accommodate the portion of the second end of the elastic retaining member 213 extending out of the relief groove 212, the first side 11 can press the second end of the elastic retaining member 213 into the relief groove 212, thus allowing the elastic retaining member to... The second end of the connector 213 will not interfere with the tightening process of the plug 2. That is, the second end of the elastic connector 213 will not prevent the second side 211 from gradually approaching the first side 11. When the plug 2 is tightened, the second end of the elastic connector 213 is positioned opposite to the anti-disengagement groove 13. At this time, under the elastic force of the elastic connector 213, the second end of the elastic connector 213 can extend out of the relief groove 212 and be inserted into the anti-disengagement groove 13, thereby restricting the plug 2 from rotating in the opposite direction to prevent the plug 2 from coming loose from the filling hole 12.
[0045] In addition, since the screw plug 2 is made of plastic, the screw plug 2 itself has a certain degree of elasticity. Although the elasticity of the screw plug 2 is relatively weak, the screw plug 2 can still have a certain deformation margin during the process of gradually tightening the screw plug 2. Even if the screw plug 2 is tightened to the point that the second side 211 contacts the first side 11, if the second end of the elastic snap-fit 213 has not yet been inserted into the anti-disengagement groove 13, the screw plug 2 can still be tightened a little more to ensure that the second end of the elastic snap-fit 213 can be inserted into the anti-disengagement groove 13.
[0046] Please see Figures 1 to 4 In some embodiments, the screw 22 is threaded into the filling hole 12. The screw 22 has a tightened position and a loosened position arranged axially along the filling hole 12. When the screw 22 is in the loosened position, there is a first distance between the second side 211 and the first side 11, and the second end of the elastic locking member 213 leaves the anti-disengagement groove 13. When the screw 22 is in the tightened position, the second side 211 contacts the first side 11, and the second end of the elastic locking member 213 engages with the anti-disengagement groove 13 to restrict the screw 22 from moving to the loosened position.
[0047] Optionally, during the tightening of the bolt, the screw 22 is threaded into the filling hole 12, and rotating the screw 22 in the positive direction will cause the screw 22 to gradually extend into the filling hole 12 along the axial direction. During this process, the screw 22 will move from the loosened position to the tightened position.
[0048] When the screw 22 is in the loose position, there is a first distance between the second side 211 and the first side 11. At this time, the second end of the elastic snap fastener 213 does not contact the first side 11, and the second end of the elastic snap fastener 213 leaves the anti-disengagement groove 13, so the screw plug 2 can be easily turned.
[0049] Continuing to rotate the screw 22 in the positive direction will drive it to the tightened position. At this time, the second side 211 will contact the first side 11, or in other words, the second side 211 will abut against the first side 11, thereby sealing the filling hole 12 and preventing the filled liquid from leaking from the filling hole 12. In addition, the second end of the elastic snap-fit 213 will engage with the anti-disengagement groove 13, preventing the plug 2 from rotating in the opposite direction and preventing the plug 2 from coming loose from the filling hole 12, thus avoiding the plastic plug 2 from coming loose due to vibration generated when the vehicle is running.
[0050] Please see Figure 5 and Figure 6 In some embodiments, the inner surface of the anti-detachment groove 13 includes a first guide surface 131 and a first abutting surface 132 disposed opposite to each other. When the screw 22 switches from the loose position to the tightened position, the first guide surface 131 slides in contact with the second end of the elastic snap-fit member 213. The first guide surface 131 is used to guide the second end of the elastic snap-fit member 213 away from the anti-detachment groove 13. When the screw 22 is in the tightened position, the first abutting surface 132 abuts against the second end of the elastic snap-fit member 213 to restrict the screw 22 from switching from the tightened position to the loosened position.
[0051] Optionally, the first guide surface 131 and the first abutting surface 132 are arranged circumferentially along the filling hole 12, and the first guide surface 131 and the first abutting surface 132 are arranged opposite to each other. The first guide surface 131 is an inclined surface and is inclined relative to the axis of the filling hole 12. The first abutting surface 132 is a vertical surface and is parallel to the axis of the filling hole 12. The first guide surface 131 includes a first side and a second side arranged opposite to each other. The first side is located near the opening of the anti-detachment groove 13, and the second side is located near the bottom surface of the anti-detachment groove 13. The first side is farther away from the first abutting surface 132 than the second side.
[0052] During the process of rotating the screw 22 in the positive direction to switch the screw 22 from the loose position to the tightened position, the second end of the elastic locking member 213 will slide into contact with the first side 11. As the screw 22 continues to rotate in the positive direction, the second end of the elastic locking member 213 will enter the anti-disengagement groove 13. The first guide surface 131 slides into contact with the second end of the elastic locking member 213, which can guide the second end of the elastic locking member 213 to leave the anti-disengagement groove 13. This prevents the second end of the elastic locking member 213 from obstructing the screw 22 from rotating in the positive direction, and thus the screw 22 can be switched from the loose position to the tightened position very smoothly.
[0053] When the screw 22 is in the tightened position, the first abutting surface 132 abuts against the second end of the elastic locking member 213. The first abutting surface 132 can prevent the second end of the elastic locking member 213 from leaving the anti-disengagement groove 13, thereby preventing the screw 22 from rotating in the opposite direction. This limits the screw 22 from switching from the tightened position to the loosened position, ensuring that the screw plug 2 can be stably installed in the filling hole 12. Even if the vehicle vibrates while driving, the screw plug 2 will not easily come loose from the filling hole 12.
[0054] Please see Figure 5 and Figure 6 In some embodiments, the second end of the elastic snap-fit member 213 has a snap-fit connector 214, which includes a second guide surface 2141 and a second abutment surface 2142 disposed opposite to each other. When the screw 22 switches from the loose position to the tightened position, the second guide surface 2141 slides in contact with the first guide surface 131 to guide the snap-fit connector 214 away from the anti-disengagement groove 13. When the screw 22 is in the tightened position, the second abutment surface 2142 abuts against the first abutment surface 132 to restrict the screw 22 from switching from the tightened position to the loose position.
[0055] Optionally, when the elastic snap-fit 213 is in the normal state, the snap-fit connector 214 extends out of the relief groove 212. The normal state of the elastic snap-fit 213 refers to the state in which the elastic snap-fit 213 is not subjected to external force. The second guide surface 2141 and the second abutment surface 2142 of the snap-fit connector 214 are arranged circumferentially along the filling hole 12.
[0056] During the process of rotating the screw 22 in the positive direction to switch it from the loose position to the tightened position, the retaining connector 214 is squeezed by the first side 11, causing the retaining connector 214 to retract into the relief groove 212. When the retaining connector 214 is facing the anti-disengagement groove 13, under the action of the elastic force of the elastic retaining member 213, the retaining connector 214 extends into the anti-disengagement groove 13. As the screw 22 continues to rotate in the positive direction, the second guide surface 2141 of the retaining connector 214 will slide into contact with the first guide surface 131. Under the guidance of the first guide surface 131, the retaining connector 214 can leave the anti-disengagement groove 13, so that the screw 22 can rotate smoothly in the positive direction, thereby making it easy to switch the screw 22 from the loose position to the tightened position.
[0057] When the screw 22 is in the tightened position, the first abutting surface 132 abuts against the second abutting surface 2142, which can better prevent the snap-fit connector 214 from leaving the anti-disengagement groove 13, thereby preventing the screw 22 from rotating in the opposite direction and further restricting the screw 22 from switching from the tightened position to the loosened position, making it difficult for the screw plug 2 to come off from the filling hole 12.
[0058] Please see Figure 7In some embodiments, the peripheral side of the screw 22 is provided with a first thread structure 221, and the filling hole sealing structure further includes a sealing ring 3. The sealing ring 3 is sleeved on the screw 22 and is located between the first thread structure 221 and the screw head 21. The screw 22 is used to be inserted into the filling hole 12, the first thread structure 221 is threadedly engaged with the filling hole 12, and the sealing ring 3 is used to seal the gap between the screw 22 and the inner wall surface of the filling hole 12.
[0059] Optionally, the inner wall of the filling hole 12 is provided with a second thread structure. When the screw 22 is inserted into the filling hole 12, the first thread structure 221 and the second thread structure are threadedly engaged. Since the sealing ring 3 is located between the first thread structure 221 and the screw head 21, when the screw 22 is in the tightened position, the sealing ring 3 is squeezed between the screw 22 and the inner wall of the filling hole 12. The sealing ring 3 can also abut against the second side 211, so that the sealing ring 3 can seal the gap between the inner wall of the filling hole 12 and the screw plug 2, which can further increase the sealing performance of the filling hole 12.
[0060] Please see Figure 2 and Figure 7 In some embodiments, the peripheral side of the screw 22 is also provided with a mounting groove 222. The mounting groove 222 extends around the circumference of the screw 22 and is located between the first thread structure 221 and the screw head 21. The sealing ring 3 is installed in the mounting groove 222.
[0061] In this way, the sealing ring 3 can be stably installed on the screw 22, and when the screw 22 is inserted into the filling hole 12, the inner wall surface of the filling hole 12 squeezes the sealing ring 3, the mounting groove 222 can restrict the movement of the sealing ring 3. Thus, even if the sealing ring 3 is squeezed and deformed, the position of the sealing ring 3 is still between the first thread structure 221 and the screw head 21, ensuring that the sealing ring 3 can seal the gap between the inner wall surface of the filling hole 12 and the screw plug 2.
[0062] Please see Figure 1 and Figure 7 In some embodiments, the screw head 21 has a third side 215, which is disposed opposite to the second side 211, and the third side 215 is provided with a wrench interface 216.
[0063] In this embodiment, a wrench interface 216 is provided on the side of the screw head 21 facing away from the second side 211, so that the wrench can be engaged with the wrench interface 216. By rotating the screw plug 2 with the wrench, the screw plug 2 can be rotated very easily. Furthermore, the screw head 21 can be designed as a disc shape, which can save more space. The wrench interface 216 can be an internal hexagonal hole, which can increase the force-bearing area between the screw head 21 and the wrench, so that the screw head 21 will not be crushed when assembling and disassembling the screw plug 2.
[0064] Please see Figure 4 In some embodiments, the first side 11 is provided with multiple anti-detachment groove groups 14, which are arranged around the axis of the filling hole 12. Each anti-detachment groove group 14 includes multiple anti-detachment grooves 13, which are arranged around the axis of the filling hole 12.
[0065] In this embodiment, the first side 11 is provided with four sets of anti-detachment groove groups 14. The four sets of anti-detachment groove groups 14 are evenly arranged around the axis of the filling hole 12. Each set of anti-detachment groove groups 14 includes four anti-detachment grooves 13. The four anti-detachment grooves 13 are evenly arranged around the axis of the filling hole 12. When the screw 22 is in the tightened position, the snap-fit connector 214 can engage with one of the multiple anti-detachment grooves 13 to prevent the screw 22 from rotating in the opposite direction. Thus, during the process of the screw 22 switching from the loosened position to the tightened position, the snap-fit connector 214 can selectively engage with one of the multiple anti-detachment grooves 13, which can avoid the situation where the first side 11 and the second side 211 have come into contact, but the snap-fit connector 214 has not engaged with the anti-detachment groove 13.
[0066] In some other embodiments, other numbers of anti-detachment groups 14 may be provided, and each anti-detachment group 14 may be provided with other numbers of anti-detachment slots 13. This application does not limit the specific number of anti-detachment slots 13, as long as it is ensured that when the screw 22 is in the tightened position, the snap-fit connector 214 can snap into the anti-detachment slot 13.
[0067] This application embodiment also provides a transmission, which includes a housing and the above-mentioned filling hole sealing structure. The housing has a receiving cavity, a boss 1 is disposed on the housing, and the filling hole 12 communicates with the receiving cavity.
[0068] In this way, lubricant can be injected into the receiving cavity from the filling hole 12, and the screw plug 2 is threaded into the filling hole 12 and tightened to the tightened position, thereby sealing the filling hole 12, preventing lubricant from leaking from the filling hole 12, and preventing the screw plug 2 from coming loose from the filling hole 12, thus avoiding the screw plug 2 from coming loose due to vibration generated when the vehicle is running.
[0069] This application also provides a vehicle, including a body and the aforementioned transmission, with the transmission mounted on the body. It should be noted that the vehicle provided in this embodiment may also include other modules or components that enable the vehicle to operate normally; however, these other modules or components will not be described in detail here.
[0070] The vehicle provided in this embodiment, by employing the aforementioned transmission, achieves lower manufacturing costs and better performance.
[0071] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A filling hole sealing structure, characterized in that, include: The boss includes a first side surface, which is provided with an injection hole and an anti-detachment groove, the anti-detachment groove being located around the injection hole; A screw plug includes a screw head and a screw rod. The screw head has a second side surface. One end of the screw rod is connected to the second side surface. The second side surface is provided with a relief groove and an elastic snap-fit member. The first end of the elastic snap-fit member is connected to the inner wall surface of the relief groove, and the second end of the elastic snap-fit member extends at least partially out of the relief groove. The screw is used to engage with the filling hole threadedly so that the second side contacts the first side, and the second end of the elastic snap-fit is engaged with the anti-loosening groove to prevent the plug from loosening.
2. The filling hole sealing structure according to claim 1, characterized in that, The screw is threaded into the filling hole, and the screw has a tightened position and a loosened position arranged along the axial direction of the filling hole; When the screw is in the released position, there is a first distance between the second side and the first side, and the second end of the elastic snap-fit member leaves the anti-dislodgement groove. When the screw is in the tightened position, the second side contacts the first side, and the second end of the elastic snap-fit is engaged with the anti-disengagement groove to restrict the screw from moving to the loosened position.
3. The filling hole sealing structure according to claim 2, characterized in that, The inner surface of the anti-detachment groove includes a first guide surface and a first abutting surface that are disposed opposite to each other; When the screw switches from the loose position to the tighten position, the first guide surface slides into contact with the second end of the elastic snap-fit member, and the first guide surface is used to guide the second end of the elastic snap-fit member away from the anti-disengagement groove. When the screw is in the tightened position, the first abutting surface abuts against the second end of the elastic snap-fit member to restrict the screw from switching from the tightened position to the loosened position.
4. The filling hole sealing structure according to claim 3, characterized in that, The second end of the elastic snap-fit member has a snap-fit connector, which includes a second guide surface and a second abutment surface disposed opposite to each other; When the screw switches from the loosened position to the tightened position, the second guide surface slides into contact with the first guide surface to guide the snap-fit connector away from the anti-disengagement groove. When the screw is in the tightened position, the second abutting surface abuts against the first abutting surface to restrict the screw from switching from the tightened position to the loosened position.
5. The filling hole sealing structure according to claim 1, characterized in that, The screw has a first thread structure on its circumferential side, and the filling hole sealing structure also includes a sealing ring. The sealing ring is sleeved on the screw and is located between the first thread structure and the screw head. The screw is inserted into the filling hole, the first thread structure is threadedly engaged with the filling hole, and the sealing ring is used to seal the gap between the screw and the inner wall surface of the filling hole.
6. The filling hole sealing structure according to claim 5, characterized in that, The screw is also provided with a mounting groove on its circumferential side. The mounting groove extends around the circumference of the screw and is located between the first threaded structure and the screw head. The sealing ring is installed in the mounting groove.
7. The filling hole sealing structure according to claim 1, characterized in that, The screw head has a third side surface, which is positioned opposite to the second side surface, and the third side surface is provided with a wrench interface.
8. The filling hole sealing structure according to claim 1, characterized in that, The first side is provided with multiple sets of anti-detachment grooves, which are arranged around the axis of the filling hole. Each set of anti-detachment grooves includes multiple anti-detachment grooves, which are arranged around the axis of the filling hole.
9. A transmission, characterized in that, The device includes a housing and a filling hole sealing structure as described in any one of claims 1-8, wherein the housing has a receiving cavity, the boss is disposed on the housing, and the filling hole communicates with the receiving cavity.
10. A vehicle, characterized in that, It includes a vehicle body and a transmission as described in claim 9, wherein the transmission is mounted on the vehicle body.