A type of anti-offset automotive engine rocker arm shaft with positioning slot

Abstract

This application relates to the field of automotive engine component technology and discloses an anti-deviation automotive engine rocker arm shaft with positioning slots, including a shaft body and a shaft seat. The two ends of the shaft body are rotatably connected to the inside of the shaft seat through multiple bearings. Multiple sets of positioning slots are opened on the outer circumference of the shaft body. Multiple rocker arm bodies are sleeved on the outer wall of the shaft body, and the rocker arm bodies correspond to the positioning slots. A positioning mechanism is installed inside the rocker arm body. The positioning mechanism includes a movable block, a positioning block, and a spring. In this utility model, by setting the positioning slots with equal spacing linear array on the shaft body, and cooperating with the positioning block of the positioning mechanism inside the rocker arm body, a stable locking fit is formed. When the engine vibrates during operation, or when the rocker arm and the rocker arm shaft have frequent relative movements, the positioning block is firmly embedded in the positioning slot, effectively limiting the axial movement of the rocker arm body on the shaft body and preventing the rocker arm shaft from deviating.

Description

Technical Field

[0001] This application relates to the field of automotive engine component technology, and in particular to an anti-offset automotive engine rocker arm shaft with a positioning slot. Background Technology

[0002] In the valve train of an automobile engine, the rocker arm shaft is a key component. Its function is to support the rocker arm and transmit the movement and force of the camshaft to control the opening and closing of the valves.

[0003] However, existing automotive engine rocker arm shafts have some problems in actual use. For example, due to the vibration of the engine during operation and the frequent relative movement between the rocker arm and the rocker arm shaft, the rocker arm shaft is prone to misalignment, which in turn affects the normal opening and closing time and lift of the valves, reducing engine performance and fuel economy.

[0004] In addition, the existing rocker arm shaft is not easy to operate during installation and disassembly, which increases the difficulty and cost of maintenance and repair. Therefore, an anti-offset automotive engine rocker arm shaft with positioning slot is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an anti-deviation automotive engine rocker arm shaft with a positioning slot to solve the problems mentioned in the background art.

[0006] The anti-deviation automotive engine rocker arm shaft with positioning slot provided in this application adopts the following technical solution:

[0007] An anti-offset automotive engine rocker arm shaft with positioning slots includes a shaft body and a shaft seat. The two ends of the shaft body are rotatably connected to the inside of the shaft seat through multiple bearings. Multiple sets of positioning slots are formed on the outer circumferential wall of the shaft body. The multiple sets of positioning slots are evenly distributed in a linear array with equal spacing on the outer wall of the shaft body.

[0008] Multiple rocker arm bodies are sleeved on the outer wall of the shaft. Each rocker arm body corresponds to a positioning slot. A positioning mechanism is installed inside the rocker arm body. The positioning mechanism includes a movable block, a positioning block, and a spring. Multiple movable blocks are arranged inside the rocker arm body. The positioning block is fixedly connected to the movable block. The end of the positioning block away from the movable block passes through the rocker arm body and is adapted to and engaged with the positioning slot. The spring is fixedly connected to the outer wall of the movable block on the side away from the positioning block.

[0009] Preferably, the rocker arm body has multiple movable slots inside, the movable block is slidably connected to the inner wall of the movable slot, and the end of the spring away from the movable block is fixedly connected to the inner wall of the movable slot.

[0010] Preferably, the inner walls on both sides of the rocker arm body are provided with multiple actuation grooves, and a lever is slidably connected to each pair of inner walls opposite to the actuation grooves. The two ends of the lever are fixedly connected to the outer wall of the movable block.

[0011] Preferably, the bearing seat includes a base and a bearing bush, which are fixedly connected by two fastening bolts, and the inner walls of both the base and the bearing bush are provided with multiple annular positioning grooves.

[0012] Preferably, the bearing includes an inner ring and an outer ring, with a plurality of bearing balls rollingly connected between the inner ring and the outer ring, wherein the inner ring is detachably mounted on the end of the shaft, and the outer ring is clamped inside the annular positioning groove.

[0013] Preferably, a through hole is provided in the middle inner wall of the rocker arm body, and the shaft is movably connected to the rocker arm body through the through hole.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] 1. By setting equidistant linear array positioning slots on the shaft, and cooperating with the positioning blocks of the internal positioning mechanism of the rocker arm body, a stable locking fit is formed. When the engine vibrates during operation, or when the rocker arm and rocker arm shaft move frequently relative to each other, the positioning blocks are firmly embedded in the positioning slots, effectively limiting the axial movement of the rocker arm body on the shaft and preventing the rocker arm shaft from shifting. This ensures that the valves can open and close according to the accurate time and lift, maintain the normal operation of the engine valve train, thereby improving engine performance, optimizing fuel economy, and avoiding problems such as power reduction and increased fuel consumption caused by rocker arm shaft shift.

[0016] 2. On the one hand, the inner ring of the bearing is detachably installed at the end of the shaft using a threaded connection, which can be quickly loosened and disassembled using conventional tools, creating conditions for the overall disassembly of the rocker arm body. On the other hand, the positioning mechanism inside the rocker arm body allows for easy disassembly by simply moving the lever in the moving groove on both sides of the inner wall, which drives the movable block to slide in the moving groove, causing the positioning block to exit from the positioning groove of the shaft body, easily releasing the axial positioning between the rocker arm body and the shaft body. This dual convenient disassembly design avoids the complex operation of the positioning mechanism in the traditional disassembly process and does not require the use of special tools, greatly shortening the maintenance time and significantly reducing the difficulty and cost of maintenance. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of an embodiment of the application;

[0018] Figure 2 This is an exploded view of an embodiment of the application;

[0019] Figure 3 for Figure 2Enlarged schematic diagram of the structure at point A in the middle;

[0020] Figure 4 This is an internal sectional view of the shaft and rocker arm body in the embodiment of the application.

[0021] Explanation of reference numerals in the attached drawings: 1. Shaft body; 101. Positioning slot; 2. Shaft seat; 201. Base; 202. Bearing bush; 203. Annular positioning groove; 204. Fastening bolt; 3. Rocker arm body; 301. Movable groove; 302. Movable block; 303. Positioning block; 304. Spring; 305. Actuating groove; 306. Actuating rod; 307. Through hole; 4. Bearing; 401. Inner ring; 402. Outer ring. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0023] This application discloses an anti-deviation automotive engine rocker arm shaft with a positioning slot. (See also...) Figure 1-4 A rocker arm shaft for an automotive engine with positioning slots is provided, comprising a shaft body 1 and a bearing seat 2. The shaft body 1 serves as the main load-bearing and transmission structure of the rocker arm shaft, and its two ends are rotatably connected to the bearing seat 2 by means of bearings 4. This rotatable connection method ensures that the shaft body 1 can rotate flexibly and provides stable support for it. Multiple positioning slots 101 are distributed on the outer circumference of the shaft body 1. These positioning slots 101 are evenly arranged in a linear array with equal spacing along the axial direction of the shaft body 1. The presence of the positioning slots 101 provides a structural basis for the subsequent precise positioning of the rocker arm body 3.

[0024] Multiple rocker arm bodies 3 are sleeved on the outer wall of the shaft 1. Each rocker arm body 3 is correspondingly set with a set of positioning slots 101. Each set of positioning slots 101 has four slots, arranged symmetrically in pairs. A positioning mechanism is installed inside the rocker arm body 3. This positioning mechanism consists of a movable block 302, a positioning block 303, and a spring 304. The movable block 302 can slide inside the rocker arm body 3. Its sliding space and trajectory are limited by the internal structure of the rocker arm body 3. The positioning block 303 is fixedly connected to the movable block 302. When the movable block 302 moves, the positioning block 303... 2. When sliding, the positioning block 303 moves accordingly. The end of the positioning block 303 away from the movable block 302 passes through the rocker arm body 3 and can form a snap-fit ​​with the positioning slot 101. Through this snap-fit, the rocker arm body 3 is axially positioned on the shaft 1 to prevent it from shifting. The spring 304 is fixedly connected to the outer wall of the movable block 302 away from the positioning block 303. The spring 304 provides elastic force to the movable block 302, pushing the movable block 302 to keep the positioning block 303 in the snap-fit ​​state with the positioning slot 101.

[0025] The rocker arm body 3 has multiple movable slots 301 inside. These movable slots 301 provide guidance and limiting space for the sliding of the movable block 302. The movable block 302 is slidably connected to the inner wall of the movable slot 301. The shape and size of the movable slot 301 are adapted to the movable block 302 to ensure that the movable block 302 will not shake or deviate during the sliding process, thereby ensuring that the positioning block 303 can accurately engage and disengage with the positioning slot 101. The end of the spring 304 away from the movable block 302 is fixedly connected to the inner wall of the movable slot 301. When the movable block 302 is subjected to external force to compress the spring 304, the spring 304 accumulates elastic potential energy. When the external force disappears, the spring 304 releases the elastic potential energy, pushing the movable block 302 to reset and maintaining the normal operation of the positioning mechanism.

[0026] Multiple actuation grooves 305 are provided on the inner walls of both sides of the rocker arm body 3. A lever 306 is slidably connected between the inner walls of every two opposing actuation grooves 305. The two ends of the lever 306 are fixedly connected to the outer walls of the movable block 302. The lever 306 provides the operator with a convenient operating component. When it is necessary to disassemble or adjust the rocker arm body 3, the operator can move the lever 306 to drive the movable block 302 to slide in the movable groove 301. Since the lever 306 is fixedly connected to the movable block 302, the movement of the lever 306 can be accurately transmitted to the movable block 302, causing the positioning block 303 to exit from the positioning slot 101, thereby realizing the separation of the rocker arm body 3 from the shaft 1, which facilitates the maintenance and repair of the equipment.

[0027] The bearing seat 2 consists of a base 201 and a bearing bush 202. The base 201 and the bearing bush 202 are fixedly connected by two fastening bolts 204. This connection method facilitates the installation and disassembly of the bearing seat 2, while ensuring the overall structural stability of the bearing seat 2. Both the inner walls of the base 201 and the bearing bush 202 are provided with annular positioning grooves 203. The function of the annular positioning grooves 203 is to provide installation and positioning space for the outer ring 402 of the bearing 4. During installation, the outer ring 402 of the bearing 4 is placed in the annular positioning groove 203, and the base 201 and the bearing bush 202 are tightened by fastening bolts 204, so that the outer ring 402 is clamped and fixed in the annular positioning groove 203. This ensures that the bearing seat 2 can stably support and position the shaft 1 during rotation, preventing the shaft 1 from radially shifting.

[0028] The bearing 4 includes an inner ring 401 and an outer ring 402. Multiple bearing balls are rolled between the inner ring 401 and the outer ring 402. The inner ring 401 is detachably installed at the end of the shaft 1. The inner ring 401 can be fixed to the end of the shaft 1 with screws, which not only ensures a firm connection between the inner ring 401 and the shaft 1, but also facilitates the disassembly of the bearing 4, so that the rotation of the shaft 1 can be accurately transmitted to the inner ring 401. The outer ring 402 is clamped inside the annular positioning groove 203 and forms a stable connection with the bearing seat 2. The presence of the bearing balls makes the relative rotation between the inner ring 401 and the outer ring 402 smoother, greatly reducing frictional resistance, reducing energy loss during equipment operation, and improving the accuracy and stability of the rotation of the shaft 1, ensuring the normal operation of the rocker arm shaft in the automobile engine.

[0029] A through hole 307 is provided in the middle inner wall of the rocker arm body 3. The shaft 1 is movably connected to the rocker arm body 3 through the through hole 307. The size of the through hole 307 is slightly larger than the outer diameter of the shaft 1, so that the rocker arm body 3 can be smoothly fitted onto the shaft 1. When the shaft 1 rotates, the rocker arm body 3 can move to a certain extent relative to the shaft 1. This movable connection method not only ensures the convenience of installing and disassembling the rocker arm body 3 on the shaft 1, but also does not affect the positioning function of the positioning mechanism on the rocker arm body 3. This allows the rocker arm body 3 to participate normally in the operation of the engine valve train mechanism, transmitting power and motion, while achieving anti-deviation positioning.

[0030] The implementation principle of the anti-offset automobile engine rocker arm shaft with positioning slot in this application embodiment is as follows: the outer ring 402 of the bearing 4 is placed in the annular positioning groove 203 of the shaft seat 2. The shaft seat 2 is composed of a base 201 and a bearing shell 202. At this time, the outer ring 402 is located in the annular positioning groove 203 on the inner wall of the base 201 and the bearing shell 202. Two fastening bolts 204 are used to pass through the base 201 and the bearing shell 202. The bolts are tightened to fix the base 201 and the bearing shell 202. The outer ring 402 of the bearing 4 is clamped and fixed in the annular positioning groove 203, completing the installation of the shaft seat 2 and the bearing 4, and providing a stable support foundation for the shaft body 1.

[0031] A threaded hole is opened at the end of the shaft 1, and an external thread is provided at the corresponding position of the inner ring 401 of the bearing 4. The inner ring 401 is installed at the end of the shaft 1 by screwing on the thread. This detachable connection method is more flexible than welding. During installation, ensure that the inner ring 401 is tightly fitted to the end of the shaft 1. The tightening action of the thread ensures that the inner ring 401 is firmly connected to the shaft 1. At the same time, the shaft 1 is rotatably connected to the inside of the bearing seat 2 through the bearing 4. The bearing balls between the inner ring 401 and the outer ring 402 of the bearing 4 allow the shaft 1 to rotate flexibly.

[0032] The rocker arm body 3 is fitted onto the shaft 1 through the through hole 307 in its middle inner wall, so that the rocker arm body 3 and the shaft 1 are movably connected. During the fitting process, the two levers 306 are pushed outward, so that the levers 306 drive the movable block 302 to move, thereby driving the positioning block 303 to retract into the movable groove 301, so that the positioning block 303 does not obstruct the rocker arm body 3 from sliding on the shaft 1. When multiple positioning blocks 303 correspond to the positioning groove 101, the spring 304 pushes the movable block 302, and the movable block 302 drives the positioning block 303 fixedly connected to it, so that the positioning block 303 passes through the rocker arm body 3 and is embedded in the positioning groove 101 corresponding to the outer circumference of the shaft 1, thereby realizing the axial positioning of the rocker arm body 3 on the shaft 1 and completing the installation of multiple rocker arm bodies 3.

[0033] When the car engine is working, the shaft 1 rotates under the support of the bearing 4. Since the inner ring 401 of the bearing 4 is fixed to the shaft 1 by threads and the outer ring 402 is fixed to the bearing seat 2, the rolling of the bearing balls makes the shaft 1 rotate smoothly and stably. The rotation of the shaft 1 is transmitted to each rocker arm body 3 through the engagement of the positioning slot 101 and the positioning block 303. The rocker arm body 3 maintains a stable axial position on the shaft 1 and will not deviate. At the same time, it can move a certain amount relative to the shaft 1 to participate in the work of the engine valve train, accurately transmit power and motion, and control the opening and closing of the valves.

[0034] When deep maintenance of the rocker arm shaft is required, or when difficulties are encountered in disassembling the rocker arm body 3 (such as when the positioning block 303 is stuck), the shaft body 1 and the inner ring 401 can be disassembled first. Use the appropriate tools to loosen and remove the thread connecting the inner ring 401 to the end of the shaft body 1, and remove the inner ring 401 from the shaft body 1. At this time, the shaft body 1 loses the constraint of the inner ring 401, and the rocker arm body 3 can be easily removed from the shaft body 1 along with the positioning mechanism. This facilitates comprehensive inspection, repair, and replacement of the rocker arm body 3, shaft 1, and positioning mechanism. After maintenance, install the rocker arm body 3 onto the shaft body 1 in sequence according to the installation process, and then install the inner ring 401 onto the end of the shaft body 1 through the thread to ensure that the rocker arm shaft can work normally.

[0035] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0036] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0037] Finally: 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 kind of anti-deviation automobile engine rocker shaft with positioning slot, including shaft body (1) and shaft seat (2), it is characterized in that: Both ends of the shaft body (1) are rotatably connected in the interior of the shaft base (2) through a plurality of bearings (4), a plurality of positioning clamping grooves (101) are arranged on the circumferential outer wall of the shaft body (1), and the positioning clamping grooves (101) are evenly distributed in linear array at equal intervals. A plurality of rocker arm bodies (3) are sleeved on the outer wall of the shaft body (1), the rocker arm bodies (3) correspond to the positioning clamping grooves (101), a positioning mechanism is installed in the interior of the rocker arm body (3), the positioning mechanism comprises a movable block (302), a positioning clamping block (303) and a spring (304), a plurality of movable blocks (302) are arranged in the interior of the rocker arm body (3), the positioning clamping block (303) is fixedly connected with the movable block (302), one end of the positioning clamping block (303) away from the movable block (302) penetrates through the rocker arm body (3) and is matched with the positioning clamping groove (101), and the spring (304) is fixedly connected to the outer wall of the movable block (302) away from the positioning clamping block (303).

2. The anti-walk automobile engine rocker shaft with locating slot according to claim 1, characterized in that: A plurality of movable grooves (301) are arranged in the interior of the rocker arm body (3), and the movable block (302) is slidably connected to the inner wall of the movable groove (301), wherein one end of the spring (304) away from the movable block (302) is fixedly connected to the inner wall of the movable groove (301).

3. The anti-walk automobile engine rocker shaft with locating slots according to claim 2, characterized in that: A plurality of driving grooves (305) are arranged on the inner walls of the two sides of the rocker arm body (3), and a driving rod (306) is slidably connected to the inner walls of every two driving grooves (305).

4. The anti-walk automobile engine rocker shaft with locating slots of claim 1, wherein: The shaft base (2) comprises a base (201) and a bearing bush (202), the base (201) and the bearing bush (202) are fixedly connected through two fastening bolts (204), and the inner walls of the base (201) and the bearing bush (202) are provided with a plurality of annular positioning grooves (203).

5. The anti-walk automobile engine rocker shaft with locating slots as claimed in claim 4 wherein: The bearing (4) comprises an inner ring (401) and an outer ring (402), a plurality of bearing balls are rollingly connected between the inner ring (401) and the outer ring (402), the inner ring (401) is detachably installed at the end of the shaft body (1), and the outer ring (402) is clamped in the interior of the annular positioning groove (203).

6. The anti-walk automobile engine rocker shaft with locating slots of claim 1, wherein: A through hole (307) is arranged in the middle inner wall of the rocker arm body (3), and the shaft body (1) is movably connected with the rocker arm body (3) through the through hole (307).

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