Speed limiting device
By designing a speed limiting device that is matched with the transmission, the throttle opening is adjusted using the structure of the speed limit gear and speed limit swing arm, the problem of overheating and wear of the engine and transmission under long-term high-speed operation is solved, and the effect of extending service life and improving fuel economy is achieved.
Patent Information
- Application Number
- CN202422133925.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In long-term high-speed operation, the load of the engine and gearbox is significantly increased, which may cause internal components to overheat and wear, affect service life, and have high fuel consumption and reduce fuel economy.
A speed limiting device is designed, including a speed limiting gear and a speed limiting swing arm. The speed limiting gear is arranged in the transmission and meshed with the power input shaft gear. The top sleeve is pushed out through the swing of the centrifuge, which in turn drives the speed limiting swing arm to rotate, adjust the throttle opening, control the amount of gasoline entering the engine, and reduces the energy supply of the engine.
Effectively reduce the energy supply of the engine, avoid the problems of overheating and wear of internal components during long-term high-speed operation, improve service life and fuel economy, and reduce engine noise and vibration, and improve vehicle riding comfort.
Smart Images
Figure CN222910123U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of automotive components, and particularly to a speed limiting device that cooperates with a gearbox to work. Background Art
[0002] When an automobile is in a high-speed driving state, the engine needs to generate greater power and effectively transmit the power to the wheels through the gearbox. However, in the state of long-term high-speed operation, the loads of the engine and the gearbox increase significantly, and problems such as overheating and wear of internal components may occur, affecting the service life of the engine and the gearbox; moreover, when the engine is in a high-speed and high-load state for a long time, the fuel consumption is relatively high, reducing the fuel economy. Therefore, it is necessary to provide a speed limiting device that cooperates with the gearbox to work. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to provide a speed limiting device that can be driven by the gearbox to perform corresponding actions when the gearbox rotates at a high speed, thereby reducing the energy supply of the engine.
[0004] A speed limiting device includes a speed limiting gear and a speed limiting swing arm, wherein:
[0005] The speed limiting gear is arranged in the gearbox and is meshed and connected with the gear on the power input shaft of the gearbox. A positioning shaft penetrates through the central axis of the speed limiting gear. One end of the positioning shaft is fixedly connected to the side wall of the gearbox, and the other end is sleeved with a top sleeve. A limiting convex edge is arranged around the outer side of the sleeve opening of the top sleeve. A circular groove is arranged on the end face of the speed limiting gear close to the top sleeve. Two parallel connecting shafts are installed at the bottom of the circular groove. The two connecting shafts are respectively located on both sides of the top sleeve, and centrifugal members are rotatably connected to both connecting shafts. An L-shaped pushing portion is arranged on the centrifugal member at the rear side of the limiting convex edge. When the speed limiting gear rotates at a high speed, the centrifugal member can rotate around the connecting shaft away from the central axis of the speed limiting gear, and the pushing portion is used to push the limiting convex edge forward;
[0006] The speed limiting swing arm is rotatably connected to the side wall of the gearbox. The speed limiting swing arm is L-shaped, one end of which contacts the front end of the top sleeve, and the other end passes through the gearbox and is connected to the throttle structure.
[0007] In some embodiments, a protruding limiting portion is arranged on the centrifugal member at the front side of the limiting convex edge, and the limiting portion is used to limit the limiting convex edge.
[0008] Compared with the prior art, the utility model at least achieves the following beneficial effects:
[0009] When the transmission is running at high speed, the speed-limiting gear of the speed-limiting device is driven to rotate at high speed, and two centrifugal components swing, that is, the centrifugal components rotate around the connecting shaft away from the central axis of the speed-limiting gear, thereby pushing out the top sleeve, and then driving the speed-limiting swing arm to rotate. When the speed-limiting swing arm rotates, it is used to adjust the throttle opening and control the amount of gasoline entering the engine, which can reduce the energy supply of the engine, achieve the purpose of speed limitation, avoid the problems of overheating and wear of internal components of the engine and transmission under the long-term high-speed operation state, improve the service life of the engine and transmission, improve fuel economy, and at the same time reduce the energy supply can reduce the noise and vibration of the engine and improve the riding comfort of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Now, one or more embodiments of the present invention will be described only by way of example with reference to the accompanying drawings, in which:
[0011] Figure 1 is a schematic diagram of the embodiment of the present application provided in the transmission;
[0012] Figure 2 is an exploded view of the embodiment of the present application;
[0013] Figure 3 is a schematic diagram when the top sleeve of the embodiment of the present application is pushed out;
[0014] Figure 4 is a schematic diagram of the structure of the speed-limiting gear and the positioning shaft of the embodiment of the present application.
[0015] The reference numerals in the drawings are: 1, speed-limiting gear; 11, circular groove; 12, connecting hole; 121, limiting convex block; 2, speed-limiting swing arm; 21, connecting plate; 3, positioning shaft; 31, limiting shoulder; 4, top sleeve; 41, limiting flange; 5, connecting shaft; 6, centrifugal component; 61, pushing part; 62, limiting part; 7, oil seal; 8, thrust cylindrical roller bearing; 9, transmission; 91, power input shaft; 10, transmission device; 20, rear axle main body. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] The present invention will be described in detail below with reference to the exemplary embodiments in the drawings. It should be understood, however, that the present application can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.
[0017] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a number of" and "a plurality of" is two or more, unless otherwise specifically defined. In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In the present application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.
[0018] As Figure 1 shown, in this embodiment, the speed limiting device is provided on the transmission 9, the transmission 9 is mounted on the transmission device 10, and the transmission device 10 is mounted on the rear axle main body 20. When the transmission 9 operates at a high speed, the transmission 9 drives the speed limiting device to perform corresponding actions, and the speed limiting device is used to reduce the energy supply of the engine, so as to achieve the purpose of speed limitation.
[0019] Referring to Figures 2 to 4 , the speed limiting device includes a speed limiting gear 1 and a speed limiting swing arm 2, wherein:
[0020] The speed-limiting gear 1 is arranged in the transmission 9 and meshed with the gear on the power input shaft 91 of the transmission 9. A positioning shaft 3 is penetrated through the central axis of the speed-limiting gear 1. One end of the positioning shaft 3 is fixedly connected to the side wall of the transmission 9, and a top sleeve 4 is sleeved on the other end. A limiting convex edge 41 is arranged around the outer side of the sleeve opening of the top sleeve 4. A circular groove 11 is arranged on the end face of the speed-limiting gear 1 close to the top sleeve 4. Two parallel connecting shafts 5 are installed at the bottom of the circular groove 11. The two connecting shafts 5 are respectively located on both sides of the top sleeve 4, and a centrifugal member 6 is rotatably connected to each of the two connecting shafts 5. An L-shaped pushing portion 61 is arranged on the centrifugal member 6 at the rear side of the limiting convex edge 41; it should be noted that when the transmission 9 runs at a high speed, it drives the speed-limiting gear 1 to rotate at a high speed. At this time, the two centrifugal members 6 swing, that is, the centrifugal members 6 rotate around the connecting shafts 5 away from the central axis of the speed-limiting gear 1. When the centrifugal members 6 rotate, the pushing portion 61 can push the limiting convex edge 41 forward, thereby ejecting the top sleeve 4;
[0021] The speed-limiting swing arm 2 is rotatably connected to the side wall of the transmission 9. The speed-limiting swing arm 2 is L-shaped. One end of it contacts the front end of the top sleeve 4, and the other end passes through the transmission 9 and is connected to the throttle structure; it should be noted that when the top sleeve 4 is ejected, it pushes the speed-limiting swing arm 2 to rotate on the transmission 9.
[0022] The working principle of this speed-limiting device is as follows: when the transmission 9 runs at a high speed, it drives the two centrifugal members 6 to swing, thereby ejecting the top sleeve 4, and then driving the speed-limiting swing arm 2 to rotate. When the speed-limiting swing arm 2 rotates, it adjusts the opening of the throttle, thereby controlling the amount of gasoline entering the engine. When the amount of gasoline entering the combustion chamber decreases, the energy supply of the engine can be reduced, achieving the purpose of speed limitation, avoiding problems such as overheating and wear of internal components of the engine and the transmission 9 during long-term high-speed operation, improving the service life of the engine and the transmission 9, improving fuel economy. At the same time, reducing the energy supply can reduce the noise and vibration of the engine, make the vehicle interior environment quieter, and improve the riding comfort of the vehicle.
[0023] Optionally, a protruding limiting portion 62 is arranged on the centrifugal member 6 at the front side of the limiting convex edge 41. When the top sleeve 4 is ejected, the limiting portion 62 can limit the limiting convex edge 41.
[0024] Optionally, a connecting plate 21 is arranged at the end of the speed-limiting swing arm 2 in contact with the top sleeve 4. The connecting plate 21 enables the top sleeve 4 to smoothly push the speed-limiting swing arm 2. An oil seal 7 is arranged between the speed-limiting swing arm 2 and the transmission 9. The oil seal 7 can prevent the gear oil from leaking from the inside of the transmission 9 to the external environment, ensure the normal operation of mechanical components and reduce frictional losses.
[0025] Optionally, a thrust cylindrical roller bearing 8 is connected to the positioning shaft 3. The thrust cylindrical roller bearing 8 is located between the speed-limiting gear 1 and the side wall of the gearbox 9, and the thrust cylindrical roller bearing 8 can bear axial loads in a single direction. A limiting shoulder 31 is provided on the positioning shaft 3; a connecting hole 12 is provided on the central axis of the speed-limiting gear 1, and an arc-shaped limiting projection 121 matching the limiting shoulder 31 is provided on the front side wall of the connecting hole 12. The cooperation between the limiting projection 121 and the limiting shoulder 31 can limit the speed-limiting gear 1.
[0026] It should be understood that all of the above embodiments are exemplary rather than restrictive. Under the concept of the present invention, any modifications, equivalent changes, and modifications made to the specific embodiments described above by those skilled in the art still fall within the scope of the technical solutions of the present invention.
Claims
1. A speed limiting device, characterized in that: Including speed limiting gear and speed limiting swing arm; The speed limiting gear is arranged in the gearbox and meshed with the gear on the power input shaft of the gearbox. A positioning shaft is passed through the central axis of the speed limiting gear. One end of the positioning shaft is fixedly connected to the side wall of the gearbox, and the other end is sleeved with a top sleeve. A limiting convex edge is surrounded by the outer side of the sleeve opening of the top sleeve. A circular groove is provided on the end surface of the speed limiting gear close to the top sleeve. Two parallel connecting shafts are installed at the bottom of the circular groove. The two connecting shafts are respectively located on both sides of the top sleeve, and centrifugal parts are rotatably connected to the two connecting shafts. An L-shaped pushing part is provided on the centrifugal part at the rear side of the limiting convex edge. When the speed limiting gear rotates at a high speed, the centrifugal part can rotate around the connecting shaft away from the central axis of the speed limiting gear, and the pushing part is used to push the limiting convex edge forward; The speed limiting swing arm is rotatably connected to the side wall of the gearbox. The speed limiting swing arm is L-shaped, one end of which is in contact with the front end of the top sleeve, and the other end passes through the gearbox and is connected to the throttle structure.
2. The speed limiting device according to claim 1, characterized in that: A raised limiting portion is provided on the centrifugal member at the front side of the limiting convex edge, and the limiting portion is used to limit the limiting convex edge.
3. The speed limiting device according to claim 1, characterized in that: A connecting plate is provided at one end of the speed limiting swing arm that contacts the top sleeve.
4. The speed limiting device according to claim 1 or 3, characterized in that: An oil seal is arranged between the speed limiting swing arm and the gearbox.
5. The speed limiting device according to claim 1, characterized in that: The positioning shaft is connected with a thrust cylindrical roller bearing, and the thrust cylindrical roller bearing is located between the speed limiting gear and the side wall of the gearbox.
6. The speed limiting device according to claim 1 or 5, characterized in that: The positioning shaft is provided with a limiting shoulder; the central axis of the speed-limiting gear is provided with a connecting hole, and the front end side wall of the connecting hole is provided with an arc-shaped limiting protrusion matching the limiting shoulder.