Adjustable rocker arm anti-rotation mounting device

Abstract

The utility model relates to the technical field of rocker arm installation, in particular to an adjustable rocker arm anti-rotation installation device. Comprising a mounting frame, a plurality of positioning mechanisms distributed in a linear array mode are arranged on the mounting frame, the positioning mechanisms are used for limiting rotation of a rocker arm, each positioning mechanism comprises a mounting plate, and a plurality of positioning seats and anti-rotation seats are symmetrically and fixedly arranged at the positions, close to the two sides, of the bottom of each mounting plate. According to the utility model, the positioning seat and the anti-rotation seat are mounted on the mounting rack through the positioning mechanism, when the rockshaft is connected with the mounting rack, the bottom of the positioning seat is attached to the surface of the rockshaft, the rocker arm on the rockshaft is in close contact with the bottom of the anti-rotation seat, and the position of the rocker arm is limited through the anti-rotation seat; the rocker arm is prevented from rotating and drooping around the rocker arm shaft in the carrying process of the rocker arm shaft, so that a worker does not need to rotate the rocker arm to adjust the mounting position of the rocker arm, the time required for mounting the rocker arm is greatly shortened, and the mounting efficiency of the rocker arm is improved.

Description

Technical Field

[0001] This utility model relates to the field of rocker arm installation technology, specifically to an adjustable rocker arm anti-rotation installation device. Background Technology

[0002] The rocker arm is an important component of the valve train in a car engine. It is responsible for opening and closing the valves and is driven by the camshaft. The rocker arm rod is usually connected to the cylinder head via a rocker arm shaft. During the installation of the rocker arm 31, workers typically first install it onto the rocker arm shaft 3, which has a limiting hole at its end. Then, workers move the rocker arm 31 and rocker arm shaft 3 and install them inside the car engine. Because the rocker arm 31 needs to rotate around the rocker arm 3 during operation, the connection between the rocker arm 31 and the rocker arm shaft 3 is rotatable and distributed across the rocker arm. The rocker arms 31 on both sides of the shaft 3 have different weights, causing the center of gravity of the rocker arm 31 to be located on one side of the rocker arm shaft 3. During the process of workers moving the rocker arm 31 and the rocker arm shaft 3, the rocker arm 31 is prone to rotate around the rocker arm shaft 3 and droop under the action of gravity. At this time, the heavier end of the rocker arm 31 is located at the bottom. When installing the rocker arm 31, it is necessary to first rotate the rocker arm 31 so that the end of the rocker arm 31 is rotated to the position corresponding to the engine mounting location before installation. This results in a long installation time for the rocker arm 31. In view of this, we propose an adjustable rocker arm anti-rotation installation device. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable rocker arm anti-rotation mounting device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, one objective of this utility model is to provide an adjustable rocker arm anti-rotation mounting device, including a mounting frame. Positioning pins are fixedly installed at both ends of the bottom of the mounting frame. The positioning pins are inserted into limiting holes at the ends of the rocker arm shaft, connecting the rocker arm shaft to the mounting frame. A sliding groove penetrating the mounting frame is provided on the mounting frame. Several positioning mechanisms are arranged in a linear array on the mounting frame. These positioning mechanisms are used to limit the rotation of the rocker arm. Each positioning mechanism includes a mounting plate slidably connected inside the sliding groove. Positioning seats and anti-rotation seats are fixedly installed at both ends of the bottom of the mounting plate. Two anti-rotation seats are positioned between two positioning seats. The positioning seats have grooves matching the rocker arm shaft, and the bottom of the anti-rotation seats has anti-rotation grooves matching the top of the rocker arm. When the rocker arm shaft is connected to the mounting frame, the rocker arm shaft fits into the groove, and the top of the rocker arm fits into the anti-rotation groove.

[0005] As a further improvement to this technical solution, the upper surface of the mounting bracket is symmetrically provided with several positioning holes along both sides of the slide groove. A movable plate is provided near the center of the upper surface of the mounting plate. A movable cavity is provided inside the movable plate. Several moving parts are provided inside the movable cavity. The moving parts include a first movable frame and a second movable frame that are slidably disposed inside the movable plate. The ends of the first movable frame and the second movable frame that are near the positioning holes extend out of the movable plate and are fixedly provided with positioning blocks. When the positioning blocks are inserted into the positioning holes, they restrict the position of the movable plate.

[0006] As a further improvement to this technical solution, a first internal compression spring is provided between the first movable frame and the inner wall of the movable cavity. The two ends of the first internal compression spring abut against the inner wall of the movable cavity and the first movable frame, respectively. The second movable frame is U-shaped. The positioning block matches the shape of the positioning hole. The end of the movable first movable frame near the second movable frame is inserted into the interior of the second movable frame. Two second internal compression springs are symmetrically arranged near both sides between the second movable frame and the inner wall of the movable cavity. The two ends of the second internal compression springs abut against the inner wall of the movable cavity and the second movable frame, respectively. When the positioning block moves out of the interior of the positioning hole, the first and second internal compression springs, which are in a compressed state, relax and drive the first and second movable frames to move, causing the positioning block to move towards the movable plate.

[0007] As a further improvement to this technical solution, the sidewalls of the movable plate and the mounting plate are provided with a number of storage slots equal to the number of positioning blocks. The storage slots are connected to the movable cavity. When the positioning block moves toward the movable plate, it is stored inside the storage slot. The length of the storage slot is greater than the length of the positioning block.

[0008] As a further improvement to this technical solution, the positioning mechanism also includes a fixing frame fixedly mounted on the upper surface of the mounting plate. The fixing frame consists of two vertical plates and a horizontal bar. The two vertical plates are fixed on the mounting plate. Limiting grooves are formed on the side walls between the two vertical plates. A limiting rod is fixedly installed inside the limiting groove. A limiting block is fixedly installed on the surface of the movable plate near the limiting groove. The limiting block is slidably connected to the limiting rod and moves up and down along the axial direction of the limiting rod.

[0009] As a further improvement to this technical solution, an external pressure spring is coaxially sleeved on the outside of the limiting rod. The two ends of the external pressure spring abut against the top wall of the limiting cavity and the upper surface of the limiting block, respectively. When the external pressure spring is in a compressed state, it relaxes and drives the movable plate to descend and approach the mounting plate.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This adjustable rocker arm anti-rotation mounting device uses a positioning mechanism to install the positioning seat and anti-rotation seat on the mounting frame. The rocker arm shaft and rocker arm are placed below the mounting frame, and the positioning pins on the mounting frame are inserted into the limiting holes at both ends of the rocker arm shaft. The rocker arm shaft and the mounting frame are connected by the positioning pins. At the same time, the bottom of the positioning seat is in close contact with the surface of the rocker arm shaft, and the rocker arm on the rocker arm shaft is in close contact with the bottom of the anti-rotation seat. The anti-rotation seat restricts the position of the rocker arm, preventing the rocker arm from rotating and sagging around the rocker arm shaft during transportation. This ensures that the position of the rocker arm corresponds to the position of the engine mounting location during installation, eliminating the need for workers to rotate the rocker arm to adjust its installation position. This significantly shortens the time required for rocker arm installation and improves the installation efficiency.

[0012] 2. This adjustable rocker arm anti-rotation mounting device, when it is necessary to install rocker arms of different numbers and spacings, allows the user to grasp the handles on the top of the fixed frame and the movable plate, causing the movable plate to move the positioning block away from the mounting plate, and move the positioning block out of the positioning hole. This allows the mounting plate to slide inside the groove, changing the distance between two adjacent mounting plates. In this way, the anti-rotation seat restricts the position of rocker arms with different spacings on the rocker arm shaft, enabling the rocker arm mounting device to install rocker arms of different numbers and spacings, thereby improving the applicability of the rocker arm mounting device. Attached Figure Description

[0013] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0014] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;

[0015] Figure 3 This is one of the three-dimensional structural schematic diagrams of the positioning mechanism in this utility model;

[0016] Figure 4 This is the second three-dimensional structural schematic diagram of the positioning mechanism in this utility model;

[0017] Figure 5 This is a cross-sectional three-dimensional structural diagram of the positioning mechanism in this utility model.

[0018] The meanings of the labels in the diagram are as follows:

[0019] 1. Mounting bracket; 11. Slide groove; 12. Positioning hole; 13. Positioning pin;

[0020] 2. Positioning mechanism; 21. Mounting plate; 211. Positioning seat; 212. Anti-rotation seat; 22. Movable plate; 221. First moving frame; 222. Second moving frame; 223. Positioning block; 224. First inner compression spring; 225. Second inner compression spring; 226. Limiting block; 23. Fixed frame; 231. Limiting rod; 232. Outer compression spring;

[0021] 3. Rocker arm shaft; 31. Rocker arm. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Please see Figures 1-5 As shown, one of the objectives of this embodiment is to provide an adjustable rocker arm anti-rotation mounting device, including a mounting frame 1. Positioning pins 13 are fixedly installed at both ends of the bottom of the mounting frame 1. The positioning pins 13 are inserted into the limiting holes at the ends of the rocker arm shaft 3, connecting the rocker arm shaft 3 to the mounting frame 1 via the positioning pins 13. When it is necessary to install the rocker arm shaft 3 and the rocker arm 31, the mounting frame 1 is installed on the lifting assembly of a handling equipment. The handling equipment can be a trolley, and the lifting assembly can be an electric telescopic rod. The mounting frame 1 is then installed on the electric telescopic rod... At the piston end of the telescopic rod, the operator moves the rocker arm shaft 3, on which the rocker arm 31 is mounted, to below the mounting frame 1. The electric telescopic rod operates by driving the mounting frame 1 toward the rocker arm shaft 3 through the piston end, so that the positioning pin 13 on the mounting frame 1 is inserted into the limiting hole of the rocker arm shaft 3. The mounting frame 1 and the rocker arm shaft 3 are connected by the positioning pin 13. The electric telescopic rod operates by driving the mounting frame 1 and the rocker arm shaft 3 to rise through the piston end, pushing the trolley to move the mounting frame 1 and the rocker arm shaft 3, thus facilitating the operator to move the rocker arm shaft 3 and the rocker arm 31 through the mounting frame 1.

[0025] Since the rocker arm 31 is rotatably mounted on the rocker arm shaft 3, during the process of transporting the rocker arm shaft 3 and the rocker arm 31 via the mounting bracket 1, the rocker arm 31 is prone to rotate around the rocker arm shaft 3 and droop under the action of gravity. During subsequent installation, the rocker arm 31 needs to be rotated first to reach the engine mounting location for installation. The time required for rotating the rocker arm 31 is relatively long, resulting in a decrease in the installation efficiency of the rocker arm 31. To facilitate the installation of the rocker arm 31, a through-groove 11 is provided on the mounting bracket 1, and several positioning mechanisms are arranged in a linear array on the mounting bracket 1. Structure 2, positioning mechanism 2 is used to restrict the rotation of rocker arm 31, so that the position of rocker arm 31 corresponds to the position of engine mounting location, which facilitates subsequent installation of rocker arm 31 by personnel. Positioning mechanism 2 includes mounting plate 21 slidably connected inside slide groove 11. Positioning seat 211 and anti-rotation seat 212 are fixedly provided at both ends of the bottom of mounting plate 21. The two anti-rotation seats 212 are arranged between the two positioning seats 211. The positioning seat 211 has a groove that matches the rocker arm shaft 3. The bottom of the anti-rotation seat 212 has an anti-rotation groove that matches the top of rocker arm 31. When the rocker arm shaft 3 is aligned with the mounting plate 11, the rocker arm 31 is positioned to prevent rotation. When the frame 1 is connected, the rocker arm shaft 3 fits into the groove, and the top of the rocker arm 31 fits into the anti-rotation groove. The anti-rotation seat 212 restricts the rocker arm 31 from rotating during transportation, keeping the rocker arm 31 in a position corresponding to the engine mounting location. This eliminates the need to adjust the installation position of the rocker arm 31, making it easier for workers to install the rocker arm 31 onto the engine. The mounting plate 21 is inserted into the slide groove 11. First, the positioning seat 211 and the anti-rotation seat 212 are installed at the bottom of the mounting frame 1 using the mounting plate 21. Then, the rocker arm shaft 3 with the rocker arm 31 is installed at the bottom of the mounting frame 1. At this time, the rocker arm 31... The arm shaft 3 and rocker arm 31 are located below the positioning seat 211 and the anti-rotation seat 212. The surface of the rocker arm shaft 3 fits into the groove at the bottom of the positioning seat 211, and the top of the rocker arm 31 fits tightly into the anti-rotation groove at the bottom of the anti-rotation seat 212. The position of the rocker arm 31 is restricted by the anti-rotation seat 212 to prevent the rocker arm 31 from rotating and sagging during transportation. This ensures that the position of the rocker arm 31 corresponds to the position of the engine mounting location during installation, eliminating the need for workers to rotate the rocker arm 31 to adjust its position, thus facilitating subsequent installation of the rocker arm 31.

[0026] Because the mounting plate 21 is slidably connected inside the slide groove 11, it is prone to sliding inside the slide groove 11 during the movement of the mounting frame 1. This causes the positioning seat 211 and the anti-rotation seat 212 to shift and misalign with the rocker arm 31, resulting in a decrease in the limiting effect of the positioning seat 211 and the anti-rotation seat 212 on the rocker arm 31. To prevent the mounting plate 21 from moving during the handling of the mounting frame 1, several positioning holes 12 are symmetrically provided on both sides of the slide groove 11 on the upper surface of the mounting frame 1. A movable plate 22 is provided on the upper surface of the mounting plate 21 near the middle. The movable plate 22 has an internal movable cavity containing several moving parts. These moving parts include a first moving frame 221 and a second moving frame 222 slidably disposed within the movable plate 22. One end of each moving frame 221 and the second moving frame 222 extends out of the movable plate 22 near the positioning hole 12 and is fixedly fitted with a positioning block 223. When the positioning block 223 is inserted into the positioning hole 12, it restricts the position of the movable plate 22. The positioning mechanism 2 also includes a fixed frame 23 fixedly disposed on the upper surface of the mounting plate 21. The fixed frame 23 consists of two vertical plates and a horizontal bar. The two vertical plates are fixed to the mounting plate 21. Limit grooves are formed on the side walls between the two vertical plates. Limit rods 231 are fixedly installed inside the limit grooves. Limit blocks 226 are fixedly installed on the surface of the movable plate 22 near the limit grooves. The limit blocks 226 are slidably connected to the limit rods 231. The limit blocks 226 rise and fall along the axis of the limit rods 231. When the anti-rotation seat 212 needs to restrict the position of the rocker arm 31, the positioning block 223 is pulled away from the movable plate 22, causing the positioning block 223 to move above the positioning hole 12 and be inserted into the positioning hole. The position of the movable plate 22 is restricted inside the positioning hole 12 to prevent the movable plate 22 from corresponding with the mounting frame 1. The mounting plate 21 and the mounting frame 1 are connected by the movable plate 22, the limiting block 226, the fixed frame 23 and the limiting rod 231, so that the mounting plate 21 and the mounting frame 1 will not move. This prevents the mounting plate 21 from moving during the transportation of the mounting frame 1, which would cause the positioning seat 211 and the anti-rotation seat 212 to be misaligned with the rocker arm 31. The anti-rotation seat 212 can better restrict the position of the rocker arm 31.

[0027] When the mounting bracket 1 needs to restrict rocker arms 31 with different spacings, a first internal compression spring 224 is provided between the first movable bracket 221 and the inner wall of the movable cavity. The two ends of the first internal compression spring 224 abut against the inner wall of the movable cavity and the first movable bracket 221, respectively. The second movable bracket 222 is U-shaped, and the positioning block 223 matches the shape of the positioning hole 12. When the first movable bracket 221 moves closer to the second movable bracket 222, the end of the first movable bracket 221 is inserted into the second movable bracket 222. Inside the frame 222, two second inner compression springs 225 are symmetrically arranged near the sides between the second movable frame 222 and the inner wall of the movable cavity. The two ends of the second inner compression springs 225 abut against the inner wall of the movable cavity and the second movable frame 222, respectively. When the positioning block 223 moves out of the positioning hole 12, the first inner compression spring 224 and the second inner compression spring 225, which are in a compressed state, relax and drive the first movable frame 221 and the second movable frame 222 to move, so that the positioning block 223 moves towards the movable plate 22.

[0028] A handle is fixedly installed on the upper surface of the movable plate 22. Several storage slots, the same number as the positioning blocks 223, are opened on the side walls of the movable plate 22 and the mounting plate 21. These storage slots are connected to the movable cavity. When the positioning blocks 223 move towards the movable plate 22, they are retracted into the storage slots. The length of the storage slots is greater than the length of the positioning blocks 223. The operator grips the top of the fixing frame 23 and the handle, gradually tightening the grip to raise the movable plate 22 away from the mounting plate 21. During the upward movement of the movable plate 22, the positioning blocks 223 are moved, causing them to be removed from the positioning holes 12, thus releasing the mounting plate. The connection between plate 21 and mounting bracket 1 is such that the first inner pressure spring 224 and the second inner pressure spring 225, which are in a compressed state, relax and drive the first moving bracket 221 and the second moving bracket 222 to move respectively. The moving first moving bracket 221 and the second moving bracket 222 drive the positioning block 223 to approach the movable plate 22 and move the positioning block 223 into the storage slot. This prevents the positioning block 223 and the first moving bracket 221 from being inserted into the second moving bracket 222 and moving out of the movable plate 22, thus avoiding obstruction of the movable plate 22. This makes it easier for subsequent workers to remove the excess anti-rotation seat 212 from the mounting bracket 1.

[0029] Simultaneously, when the first movable frame 221 and the second movable frame 222 move, the first movable frame 221 inserts into the interior of the second movable frame 222, so that the first movable frame 221 and the second movable frame 222 overlap, thereby reducing the space required for the first movable frame 221 to move into the second movable frame 222. Then, the worker moves the fixed frame 23 to make the mounting plate 21 slide inside the slide groove 11. The moving mounting plate 21 drives the anti-rotation seat 212 to move to the position corresponding to the rocker arm 31. The worker pulls the positioning block 223 out from the inside of the storage groove, so that the movable plate 22 descends and drives the positioning block 223 closer to the mounting frame 1. The descending movable plate 22 inserts the positioning block 223 into the inside of the positioning hole 12, thereby connecting the mounting plate 21 to the mounting frame 1 and fixing the position of the mounting plate 21 and the anti-rotation seat 212. This facilitates the subsequent restriction of the position of the rocker arm 31 by the anti-rotation seat 212, preventing the rocker arm 31 from rotating and sagging during transportation, which would affect the subsequent installation of the rocker arm 31.

[0030] To prevent the positioning block 223 from moving out of the positioning hole 12 during use, an external compression spring 232 is coaxially sleeved on the outside of the limiting rod 231. The two ends of the external compression spring 232 abut against the top wall of the limiting cavity and the upper surface of the limiting block 226, respectively. When the external compression spring 232 is in a compressed state, it relaxes and drives the movable plate 22 to descend and approach the mounting plate 21. During the upward movement of the movable plate 22, the limiting block 226 rises with the movable plate 22 and compresses the external compression spring 232. When the mounting plate 21 has moved and inserted the positioning block 223 into the positioning hole 12, the external compression spring 232 relaxes and exerts a force on the movable plate 22 in the direction of the mounting plate 21, so that the movable plate 22 and the mounting plate 21 are in close contact. This increases the stability of the movable plate 22 during use and prevents the movable plate 22 from separating from the mounting plate 21, which would cause the positioning block 223 to move out of the positioning hole 12. This improves the stability of the connection between the movable plate 22 and the mounting bracket 1.

[0031] In summary, the working principle of this solution is as follows: The operator holds the top of the fixed frame 23 and the handle and gradually tightens the grip, causing the movable plate 22 to rise away from the mounting plate 21. During the rise of the movable plate 22, the positioning block 223 is moved, moving the positioning block 223 out of the positioning hole 12. Then, the operator moves the fixed frame 23 to make the mounting plate 21 slide inside the slide groove 11, moving the anti-rotation seat 212 to the position corresponding to the rocker arm 31. The operator releases the handle and pulls the positioning block 223 out of the storage groove. The compressed external pressure spring 232 relaxes, causing the movable plate 22 to move closer to the mounting plate 21, so that the positioning block 223 is inserted into the positioning hole 12, connecting the mounting frame 1 to the mounting plate 21. Then, the mounting frame 1 is installed on the piston end of the electric telescopic rod. The operator moves the rocker arm shaft 3, on which the rocker arm 31 is installed, below the mounting frame 1. The piston end drives the mounting bracket 1 to move closer to the rocker arm shaft 3, causing the positioning pin 13 on the mounting bracket 1 to insert into the limiting hole of the rocker arm shaft 3. Thus, the mounting bracket 1 and the rocker arm shaft 3 are connected by the positioning pin 13. At this time, the surface of the rocker arm shaft 3 is in contact with the groove at the bottom of the positioning seat 211, and the top of the rocker arm 31 is in close contact with the anti-rotation groove at the bottom of the anti-rotation seat 212. Subsequently, the electric telescopic rod drives the mounting bracket 1 and the rocker arm shaft 3 to rise through the piston end, pushing the trolley to move the mounting bracket 1 and the rocker arm shaft 3. This makes it easier for the staff to move the rocker arm shaft 3 and the rocker arm 31 through the mounting bracket 1. During the movement of the rocker arm shaft 3 and the rocker arm 31, the anti-rotation seat 212 prevents the rocker arm 31 from rotating and sagging during the movement. This ensures that the position of the rocker arm 31 corresponds to the position of the engine mounting location during installation, making it easier for the staff to install the rocker arm 31 later.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable rocker arm anti-rotation mounting device, comprising a mounting frame (1), wherein positioning pins (13) are fixedly provided at both ends of the bottom of the mounting frame (1), the positioning pins (13) are inserted into the limiting holes at the ends of the rocker arm shaft (3), and the rocker arm shaft (3) is connected to the mounting frame (1) through the positioning pins (13), wherein a sliding groove (11) is provided on the mounting frame (1), characterized in that: The mounting frame (1) is provided with a number of positioning mechanisms (2) arranged in a linear array. The positioning mechanism (2) is used to restrict the rotation of the rocker arm (31). The positioning mechanism (2) includes a mounting plate (21) slidably connected inside the slide groove (11). The bottom ends of the mounting plate (21) are fixedly provided with positioning seats (211) and anti-rotation seats (212). Two anti-rotation seats (212) are arranged between two positioning seats (211). The positioning seat (211) is provided with a groove that matches the rocker arm shaft (3). The bottom of the anti-rotation seat (212) is provided with an anti-rotation groove that matches the top of the rocker arm (31). When the rocker arm shaft (3) is connected to the mounting frame (1), the rocker arm shaft (3) fits into the groove, and the top of the rocker arm (31) fits into the anti-rotation groove.

2. The adjustable rocker arm anti-rotation mounting device according to claim 1, characterized in that: The mounting bracket (1) has several positioning holes (12) symmetrically opened on both sides of the slide groove (11) on its upper surface. The mounting plate (21) has a movable plate (22) located near the middle on its upper surface. The movable plate (22) has a movable cavity inside. The movable cavity has several moving parts inside. The moving parts include a first moving frame (221) and a second moving frame (222) that are slidably disposed inside the movable plate (22). The first moving frame (221) and the second moving frame (222) have one end extending out of the movable plate (22) near the positioning hole (12) and are fixedly provided with a positioning block (223). When the positioning block (223) is inserted into the positioning hole (12), it restricts the position of the movable plate (22).

3. The adjustable rocker arm anti-rotation mounting device according to claim 2, characterized in that: A first internal compression spring (224) is provided between the first movable frame (221) and the inner wall of the movable cavity. The two ends of the first internal compression spring (224) abut against the inner wall of the movable cavity and the first movable frame (221) respectively. The second movable frame (222) is U-shaped. The positioning block (223) matches the shape of the positioning hole (12). The movable first movable frame (221) is inserted into the interior of the second movable frame (222) at one end near the second movable frame (222). The second movable frame (222) and the movable cavity... Two second inner compression springs (225) are symmetrically arranged near the two sides of the inner wall. The two ends of the second inner compression springs (225) abut against the inner wall of the movable cavity and the second movable frame (222), respectively. When the positioning block (223) moves out of the positioning hole (12), the first inner compression spring (224) and the second inner compression spring (225) in the compressed state relax and drive the first movable frame (221) and the second movable frame (222) to move, so that the positioning block (223) moves towards the movable plate (22).

4. The adjustable rocker arm anti-rotation mounting device according to claim 2, characterized in that: The sidewalls of the movable plate (22) and the mounting plate (21) are provided with a number of storage slots equal to the number of positioning blocks (223). The storage slots are connected to the movable cavity. When the positioning block (223) moves toward the movable plate (22), the positioning block (223) is stored inside the storage slot. The length of the storage slot is greater than the length of the positioning block (223).

5. The adjustable rocker arm anti-rotation mounting device according to claim 2, characterized in that: The positioning mechanism (2) further includes a fixing frame (23) fixedly mounted on the upper surface of the mounting plate (21). The fixing frame (23) consists of two vertical plates and a horizontal bar. The two vertical plates are fixed on the mounting plate (21). Limiting grooves are opened on the side walls between the two vertical plates. A limiting rod (231) is fixedly installed inside the limiting groove. A limiting block (226) is fixedly installed on the surface of the movable plate (22) near the limiting groove. The limiting block (226) is slidably connected to the limiting rod (231). The limiting block (226) moves up and down along the axis of the limiting rod (231).

6. The adjustable rocker arm anti-rotation mounting device according to claim 5, characterized in that: An external compression spring (232) is coaxially sleeved on the outside of the limiting rod (231). The two ends of the external compression spring (232) abut against the top wall of the limiting cavity and the upper surface of the limiting block (226), respectively. When the external compression spring (232) in the compressed state relaxes, it drives the movable plate (22) to descend and approach the mounting plate (21).

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