Cast steel rocker arm

Abstract

The utility model discloses a cast steel rocker arm and relates to the technical field of rocker arms, the cast steel rocker arm comprises a rocker arm body, the rocker arm body comprises a left rocker arm and a right rocker arm, the left rocker arm is provided with a first clamping groove, a connecting column is arranged in the first clamping groove, and the connecting column is provided with a mounting key connected with a part connected with the rocker arm body in a matched mode; the two sides of the abutting plate abut against the first inner side wall of the clamping groove and a part connected with the rocker arm body respectively, mounting plates are arranged on the two sides of the left rocker arm corresponding to the abutting plate, and the mounting plates are provided with a plurality of fixing bolts connected with the abutting plate through bolts. The abutting plate abuts against the inner side of the first clamping groove, and the connecting column is fixed through the mounting plate and the fixing bolt, so that the firmness and stability of connection between the rocker arm body and a part are improved, the connection part can bear large loads, the stress concentration problem is reduced, and the service life of the rocker arm is prolonged. And the modularized connection mode facilitates the assembly and disassembly of different parts.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of rocker arms, in particular to a cast steel rocker arm. BACKGROUND

[0002] As a core transmission component of industrial equipment, the cast steel rocker arm is widely used in mine machinery, engineering machinery and grinding equipment. In the vertical mill, it needs to bear an alternating load of 500-1000kN, and convert the pressure of the hydraulic cylinder into the rolling pressure of the mill roller on the material; in the excavator, it needs to realize material loading and unloading through high-frequency swinging. With the development of heavy-duty and intelligent equipment, the stability of the connection between the rocker arm and the parts becomes the key to the reliability.

[0003] In the prior art, the connection between the cast steel rocker arm and the parts is usually achieved through the interference fit of the taper sleeve and the shaft to transmit torque, and high-strength bolt groups are used to realize axial locking.

[0004] According to the related technology in the above, the inventor believes that the taper contact is easy to cause stress concentration and thus unstable connection. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the application is to provide a cast steel rocker arm to improve the problem of unstable connection between the cast steel rocker arm and the parts.

[0006] The application provides a cast steel rocker arm, which adopts the following technical scheme:

[0007] A cast steel rocker arm, comprising a rocker arm body, the rocker arm body comprising a left rocker arm and a right rocker arm, the left rocker arm being provided with a clamping groove one, a connecting column being arranged in the clamping groove one, the connecting column being provided with an installation key for connecting with a part connected with the rocker arm body, the connecting column being provided with an abutting plate at both ends, the abutting plate being abutted with the inner side wall of the clamping groove one and the part connected with the rocker arm body at both sides, respectively, the left rocker arm being provided with an installation plate corresponding to the abutting plate at both sides, the installation plate being provided with a plurality of fixing bolts for bolt connection with the abutting plate.

[0008] By adopting the above technical scheme, the abutting plate is abutted with the inner side of the clamping groove one, and the connecting column is fixed by the installation plate using the fixing bolts, the installation key is matched with the key groove of the part, which helps to improve the firmness and stability of the connection between the rocker arm body and the part, so that the connection part can bear a larger load, which helps to reduce the stress concentration problem that may occur in the traditional connection mode, enhances the reliability of the cast steel rocker arm working under complex conditions, and the modular connection mode facilitates the assembly and disassembly of different parts.

[0009] Optionally, the fixing bolts are arranged around the center of the installation plate.

[0010] By adopting the technical scheme, the torsional resistance of the connecting part and the uniformity of the pre-tightening force are improved through the structure feature that the fixing bolts are arranged around the circumference of the center of the mounting plate, which helps to make the stress of each fixing bolt more balanced and reduce the risk of loosening or damage caused by excessive local stress.

[0011] Optionally, the abutting plate is provided with an elastic washer I abutting the inner side wall of the clamping groove I on the side close to the mounting plate.

[0012] By adopting the technical scheme, the absorbing and buffering capacity of the connecting part to vibration and the compensation capacity to casting tolerance are improved through the structure feature that the elastic washer I is arranged on the side of the abutting plate close to the mounting plate and abuts the inner side wall of the clamping groove I, which helps to reduce the loosening of the bolts caused by vibration during equipment operation and adapt to the small gap caused by manufacturing errors to ensure that the abutting plate and the inner side wall of the clamping groove I are always closely fitted and maintain the stability of the connection.

[0013] Optionally, the abutting plate is provided with an elastic washer II abutting the part connected to the rocker body on the side away from the mounting plate.

[0014] By adopting the technical scheme, the vibration transmission is further reduced and the friction between the abutting plate and the part is increased through the structure feature that the elastic washer II is arranged on the side of the abutting plate away from the mounting plate and abuts the part connected to the rocker body, which helps to prevent the relative rotation of the part and also plays a certain anticorrosion isolation role.

[0015] Optionally, the elastic washer II is provided with anti-skid protrusions.

[0016] By adopting the technical scheme, the friction between the elastic washer II and the part connected to the rocker body is improved through the structure feature that the anti-skid protrusions are arranged on the elastic washer II, which helps to prevent the rotation or displacement of the part relative to the abutting plate during work and enhances the reliability and stability of the connection.

[0017] Optionally, the anti-skid protrusions are arranged around the circumference of the center of the abutting plate.

[0018] By adopting the technical scheme, the anti-skid effect and the constraint capacity to the part are further improved through the structure feature that the anti-skid protrusions are arranged around the circumference of the center of the abutting plate, which helps to make the anti-skid force more uniformly distributed in the circumferential direction, helps to prevent the rotation of the part, improves the stability and reliability of the connection, and also enhances the working performance of the cast steel rocker in complex working conditions.

[0019] Optionally, a reinforcing column is inserted in the connecting column, the reinforcing column penetrates through the mounting plate at both ends, and the mounting plate is provided with fastening nuts threadedly connected to both ends of the reinforcing column.

[0020] By adopting the technical scheme, the reinforcing column is arranged, the bending strength and overall rigidity of the connecting column are improved, the connecting column can bear greater bending moment and load, heavy load working conditions are adapted, in the case that the fixing bolt is abnormally loose or fails, the reinforcing column can provide certain redundant bearing capacity, and the safety and reliability of the cast steel rocker arm are improved.

[0021] Optionally, the rocker arm body is rotationally arranged with a fixing seat, the right rocker arm is provided with a clamping groove two, and the side wall of the clamping groove two is provided with a bearing ring.

[0022] By adopting the technical scheme, the fixing seat helps to reduce the frictional resistance when the rocker arm rotates, the rotation is smoother, the energy loss is reduced, the bearing ring can better bear the radial and axial loads, the overall service life of the cast steel rocker arm is prolonged, and the maintenance and replacement of the bearing ring are facilitated, and the maintainability of the equipment is improved.

[0023] To sum up, the present application has at least one of the following beneficial technical effects of the cast steel rocker arm:

[0024] 1. The abutting plate abuts against the inner side of the clamping groove one, and the connecting column is fixedly connected to the mounting plate by the fixing bolt, the mounting key is matched with the part key groove, the firmness and stability of the connection between the rocker arm body and the part are improved, the connecting part can bear larger load, the stress concentration problem that may occur in the traditional connection mode is reduced, the reliability of the cast steel rocker arm working under complex working conditions is improved, and the modular connection mode facilitates the assembly and disassembly of different parts;

[0025] 2. The elastic washer one is arranged on the side of the abutting plate close to the mounting plate and abuts against the inner side wall of the clamping groove one, the absorption and buffering capacity of the connecting part to vibration and the compensation capacity to the casting tolerance are improved; the bolt loosening phenomenon caused by vibration during equipment operation is reduced, and the small gap caused by manufacturing error is adapted, so that the abutting plate and the inner side wall of the clamping groove one are always closely attached, and the stability of the connection is maintained;

[0026] 3. The reinforcing column is arranged, the bending strength and overall rigidity of the connecting column are improved, the connecting column can bear greater bending moment and load, heavy load working conditions are adapted, in the case that the fixing bolt is abnormally loose or fails, the reinforcing column can provide certain redundant bearing capacity, and the safety and reliability of the cast steel rocker arm are improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic view of the overall structure of the cast steel rocker arm;

[0028] Figure 2 is a schematic view of the connecting column structure in the embodiment;

[0029] Figure 3 is Figure 2 is an enlarged schematic view of A in FIG.

[0030] In the figure, 1, rocker body; 11, left rocker; 111, clamping groove one; 12, right rocker; 121, clamping groove two; 1211, bearing ring; 2, connecting column; 21, stop plate; 22, mounting key; 3, mounting plate; 31, fixing bolt; 4, elastic washer one; 5, elastic washer two; 51, anti-skid protrusion; 6, reinforcing column; 61, fastening nut; 7, fixed seat. DETAILED DESCRIPTION

[0031] The following will be combined with the Figure 1 - the Figure 2 , the present application is further described in detail.

[0032] A cast steel rocker, referring to FIG. 1, comprising a rocker body 1, which is long in whole, and the material is selected from high-strength cast steel material. The middle part of the rocker body 1 is rotationally connected with a fixed seat 7 through a pin shaft. The pin shaft, the fixed seat 7 and the corresponding mounting hole on the rocker body 1 adopt interference fit to realize stable rotation setting and ensure that the rocker body 1 can swing flexibly during work. The rocker body 1 comprises a left rocker 11 and a right rocker 12, wherein the left rocker 11 and the right rocker 12 are integrated to ensure the overall structural strength. The left rocker 11 is provided with a clamping groove one 111, which is rectangular in shape and its size is accurately designed according to the specification of the connecting column 2. The right rocker 12 is provided with a clamping groove two 121, which is also rectangular in shape and is designed in correspondence with the clamping groove one 111 of the left rocker 11. The side wall of the clamping groove two 121 is provided with a bearing ring 1211, which is a deep groove ball bearing and is installed on the side wall of the clamping groove two 121 through interference fit.

[0033] Referring to FIG. 2, the clamping groove one 111 is provided with a connecting column 2, which is cylindrical in structure and made of the same high-strength cast steel material as the rocker body 1. A hole is formed in the connecting column 2 to communicate between two ends. The connecting column 2 is provided with a mounting key 22 for connecting with parts. The mounting key 22 and the connecting column 2 are integrated and arranged along the axial direction of the connecting column 2 to realize accurate positioning and connecting with parts.

[0034] Referring to FIG. 2, Figure 3The connecting column 2 is provided with a stop plate 21 at both ends, the stop plate 21 is a circular flat plate, and is firmly connected with the connecting column 2 through a welding process, so as to ensure the integrity and stability of the connection. The two sides of the stop plate 21 are respectively abutted with the inner side wall of the clamping groove one 111 and a part connected with the rocker body 1. The stop plate 21 is provided with an elastic washer one 4 abutting with the inner side wall of the clamping groove one 111 on the side close to the mounting plate 3. The elastic washer one 4 is made of rubber material with good elasticity and wear resistance, and is in the shape of a circular ring piece and is tightly attached to the side of the stop plate 21 close to the inner side wall of the clamping groove one 111 through adhesive material. The side of the stop plate 21 away from the mounting plate 3 is provided with an elastic washer two 5 abutting with the part connected with the rocker body 1. The elastic washer two 5 is also in the shape of a circular ring piece and is made of polyurethane material with good oil resistance, wear resistance and elasticity. The elastic washer two 5 is arranged on the contact surface of the stop plate 21 and the part, and the elastic washer two 5 is provided with anti-skid protrusions 51. The anti-skid protrusions 51 are arranged around the circumferential direction of the center of the stop plate 21, and a plurality of anti-skid protrusions 51 can be arranged. The anti-skid protrusions 51 are in the shape of a long strip and are integrally formed on the surface of the elastic washer two 5 through vulcanization process, so as to increase the friction force when the anti-skid protrusions 51 contact with the part.

[0035] Referring to FIG. 1, Figure 2 The left rocker arm 11 is provided with a mounting plate 3 on both sides corresponding to the stop plate 21. The mounting plate 3 is provided with a plurality of fixing bolts 31 connected with the stop plate 21 through bolts. The fixing bolts 31 are high-strength alloy steel bolts, and are arranged around the circumferential direction of the center of the mounting plate 3 in a uniform distribution state, so as to ensure that uniform fastening force is applied to the stop plate 21 and effectively prevent loosening. The connecting column 2 is provided with a reinforcing column 6. The reinforcing column 6 is a cylindrical solid steel bar, and is made of high-strength alloy steel. The diameter of the reinforcing column 6 is designed according to the bearing requirement of the connecting column 2. The reinforcing column 6 penetrates through the mounting plate 3 at both ends. The mounting plate 3 is provided with a fastening nut 61 threadedly connected with both ends of the reinforcing column 6. The fastening nut 61 is threadedly connected with the reinforcing column 6, and after being tightened, the reinforcing column 6 is firmly fixed on the mounting plate 3, so that the reinforcing column 6 can effectively enhance the bending strength of the connecting column 2.

[0036] The implementation principle of the embodiment of the application is as follows:

[0037] In actual use, the mounting key 22 on the connecting column 2 in the left rocker arm 11 clamping groove 111 is tightly matched with external parts to ensure effective transmission of force, and the abutting plate 21 at both ends of the connecting column 2 cooperates with the elastic washer 1 4 and the elastic washer 2 5 to provide multiple protections. The elastic washer 1 4 absorbs vibration energy, while the elastic washer 2 5 increases the friction between the connecting column 2 and the parts. The fixing bolts 31 evenly distributed on the mounting plate 3 of the left rocker arm 11 are tightened to provide uniform and stable fastening force. The reinforcing column 6 penetrating through the mounting plate 3 and fixed by the fastening nut 61 shares part of the load when the connecting column 2 bears a large bending moment. The above helps to reduce the stress concentration problem that may occur in the traditional connection mode.

[0038] The embodiments of the present specific embodiment are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same parts are indicated by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape, principle of the present application should be covered by the protection scope of the present application.

Claims

1. A cast steel rocker arm comprising a rocker arm body (1), characterized in that: Said rocker body (1) includes left rocker (11) and right rocker (12), the left rocker (11) is provided with clamping groove one (111), the clamping groove one (111) is provided with connecting column (2), the connecting column (2) is provided with mounting key (22) that is connected with the part of the rocker body (1) matched connection, the connecting column (2) is provided with abutment plate (21) at both ends, the abutment plate (21) both sides are respectively with the inner wall of clamping groove one (111) and with the part of the rocker body (1) is connected and is resisted, the left rocker (11) both sides are provided with mounting plate (3) corresponding abutment plate (21), the mounting plate (3) is provided with several fixed bolts (31) that are bolted with abutment plate (21).

2. A cast steel rocker arm according to claim 1, characterized in that: The fixed bolt (31) is arranged around the circumcenter of the mounting plate (3).

3. A cast steel rocker arm as defined in claim 1, wherein: The abutment plate (21) is provided with elastic washer one (4) that is abutted with the inner wall of clamping groove one (111) on the side close to the mounting plate (3).

4. The cast steel rocker arm of claim 1, wherein: The abutment plate (21) is provided with elastic washer two (5) that is abutted with the part of the rocker body (1) connected on the side away from the mounting plate (3).

5. A cast steel rocker arm as defined in claim 4, characterized in that: The elastic washer two (5) is provided with anti-skid protrusion (51).

6. A cast steel rocker arm as defined in claim 5, characterized in that: The anti-skid protrusion (51) is arranged around the circumcenter direction of the abutment plate (21).

7. A cast steel rocker arm as defined in claim 1, wherein: The connecting column (2) is inserted with reinforcing column (6), the reinforcing column (6) penetrates the mounting plate (3) at both ends, and the mounting plate (3) is provided with fastening nut (61) that is screwed at both ends of the reinforcing column (6).

8. The cast steel rocker arm of claim 1, wherein: The rocker body (1) is rotatably provided with fixed seat (7), the right rocker (12) is provided with clamping groove two (121), and the side wall of the clamping groove two (121) is provided with bearing ring (1211).

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