Rocker arms and mechanical equipment

Abstract

The present invention provides a rocker arm and a mechanical device. The rocker arm comprises: a housing, provided with a notch, the opening end of the notch extending to the end face of the housing; a connecting frame, provided at one end of the housing close to the notch; a first fastener, used to connect the housing and the connecting frame, one end of the first fastener extending into the notch; wherein the notch and the first fastener are respectively provided in a one-to-one correspondence and are provided in a plurality. The present invention provides a notch on the housing, the first fastener extends into the notch, and when the first fastener breaks, it is convenient to disassemble and replace the first fastener.

Description

Technical Field

[0001] The present application belongs to the technical field of coal mining equipment, and in particular, relates to a rocker arm and mechanical equipment. Background Art

[0002] In the related technology, the coal mining machine generally adopts a longer split straight rocker arm due to the high mining height of the fully mechanized mining face in thick coal seams. The straight rocker arm has an additional intermediate connection structure compared to the integral curved rocker arm, and the connection structure needs to be connected to the rocker arm body. At present, most of them adopt the structural form of positioning pin positioning and stud connection to connect the rocker arm body and the connection structure. Among them, the connection between the stud and the rocker arm body adopts a planted wire connection or a square nut connection, and the connection between the stud and the connection structure adopts a high-strength nut (tightened with a hydraulic tensioner), a hydraulic nut or a super nut (thrust nut) to tighten.

[0003] When the coal mining machine is cutting gangue with a hardness greater than f4, the rocker arm will vibrate violently. The studs will fail to tighten and become loose within a certain period of time, and the impact force generated by the vibration will make the studs easily break. If the broken studs occur in the inner hole of the rocker arm body, they cannot be disassembled and replaced. Summary of the invention

[0004] The embodiments according to the present invention are intended to solve or improve at least one of the above technical problems.

[0005] A first object of an embodiment of the present invention is to provide a rocker arm.

[0006] A second object of an embodiment of the present invention is to provide a mechanical device.

[0007] To achieve the first purpose of an embodiment of the present invention, the technical solution of the present invention provides a rocker arm, including: a shell, provided with a slot, the opening end of the slot extending to the end face of the shell; a connecting frame, arranged at one end of the shell close to the slot; a first fastener, used to connect the shell and the connecting frame, one end of the first fastener extending into the slot; wherein the slot and the first fastener are respectively arranged in multiple numbers in a one-to-one correspondence.

[0008] In this technical solution, in order to ensure that the shell and the connecting frame are firmly connected, a plurality of first fasteners can be arranged along the circumferential direction of the shell or the connecting frame along the axial direction. And the plurality of first fasteners are spaced apart from each other and evenly distributed. The first fastener can be an integral rod-shaped structure, and one end of the first fastener passes through the connecting frame so that the first fastener can be connected to the connecting frame. The other end of the first fastener extends into the shell so that the first fastener can be connected to the shell. By arranging a notch on the shell, the first fastener extends into the notch. When the first fastener breaks, since the open end of the notch extends to the surface of the shell, the broken part of the first fastener can be easily removed, which facilitates the disassembly and replacement of the first fastener, ensuring that the rocker arm can continue to be used. When the rocker arm is applied to a coal mining machine, the normal use of the coal mining machine is ensured.

[0009] In addition, the technical solution provided according to the embodiment of the present invention may also have the following additional technical features:

[0010] In the above technical solution, the first fastener includes: a screw rod that passes through the connecting frame and one end of the screw rod extends into the slot; a first nut that is arranged in the slot and the first nut is sleeved on the screw rod; and a second nut that is sleeved on one end of the screw rod away from the first nut.

[0011] In this technical solution, the first fastener mainly includes a screw, a first nut and a second nut. Threaded holes are respectively provided in the shell and the connecting frame for passing the screw. The first nut is arranged in the notch for tightening and fixing the connection between the screw and the shell. The second nut is used to tighten and fix the connection between the screw and the connecting frame. The working principle of the super nut is to use the friction between the nut and the bolt for self-locking, which is an anti-loosening measure. When the stud breaks in the notch, the broken screw and the first nut can be directly taken out from the notch. When the screw breaks in the threaded hole of the connecting frame, after disassembling all the screws connecting the shell and the connecting frame, separate the shell from the connecting frame, and the broken screw and the first nut can be taken out.

[0012] In any of the above technical solutions, a groove is provided in the connecting frame, and the second nut is arranged in the groove.

[0013] In this technical solution, in order to increase the structural strength of the connecting frame, a plurality of grooves are provided on the side of the connecting frame, and the end of each screw rod away from the first nut penetrates the connecting frame and then extends into the corresponding groove, making the connection more convenient. The groove can be replaced by a frame structure, and the frame structure is connected to the connecting frame, so that the second nut can act in the groove when subjected to force, thereby avoiding direct force on the connecting frame and increasing the service life of the connecting frame.

[0014] In any of the above technical solutions, the groove is provided with open structures at opposite ends for passing the screw rod, and the groove is provided with a protective cap at the open structure away from the first nut, and the protective cap is connected to the connecting frame through the groove.

[0015] In this technical solution, the opposite ends of the groove can be provided with open structures respectively, so that the screw rod can pass through. The second nut is placed in the groove. The second nut is sleeved on the screw rod and can be used to tighten the connection between the screw rod and the connecting frame. The protective cap is arranged on the open structure of the groove, used to block the groove, and can be used to protect the second nut.

[0016] In any of the above technical solutions, the rocker arm also includes: a first guard plate, which is arranged on the connecting frame, and the first guard plate is located outside the groove to protect the second nut.

[0017] In this technical solution, the first guard plate is connected to the connecting frame, and the first guard plate is located outside the groove, which can protect the second nut. Since the screw rod is provided in plurality, the first guard plate is also provided in plurality on the housing connecting frame.

[0018] In any of the above technical solutions, the rocker arm also includes: a second fastener, one end of which is connected to the connecting frame and the other end of which is connected to the screw rod.

[0019] In this technical solution, the second fastener is used to connect the screw rod and the connecting frame, which can further improve the screw rod's resistance to fracture and increase the structural stability of the screw rod connection housing and the connecting frame.

[0020] In any of the above technical solutions, the rocker arm also includes: a second guard plate, which is arranged on the shell, and the second guard plate is located between the slot and the connecting frame.

[0021] In this technical solution, the second guard plate is connected to the housing, and the second guard plate is located between the notch and the connecting frame, and can protect the first fastener. Specifically, since the screw of the first fastener penetrates into the housing, the second guard plate can mainly protect the screw. Since the screw is provided in plurality, the second guard plate is also provided in plurality on the housing.

[0022] In any of the above technical solutions, the rocker arm also includes: a positioning component, which is arranged between the shell and the connecting frame and is used to position the shell and the connecting frame.

[0023] In this technical solution, the positioning assembly is arranged between the connecting frame and the housing, and is used to position the housing and the connecting frame. After the screw is fastened by the first nut and the second nut, it can be ensured that the screw can be connected without loosening, thereby preventing or reducing the risk of the screw breaking.

[0024] In any of the above technical solutions, the positioning assembly includes: a positioning pin connected between the shell and the connecting frame; and / or a positioning stop provided between the shell and the connecting frame.

[0025] In this technical solution, the positioning pin is connected and arranged between the connecting frame and the shell, wherein the two ends of the positioning pin are respectively inserted into the connecting frame and the shell to achieve relative fixation between the connecting frame and the shell. A plurality of positioning pins can be provided, and they are arranged along the circumference of the shell or the connecting frame in the axial direction, so that the positioning of the connecting frame and the shell is more secure.

[0026] To achieve the second purpose of an embodiment of the present invention, the technical solution of the present invention provides a mechanical device, including: a device body; a rocker arm in any technical solution; wherein at least a portion of the rocker arm is connected to the device body.

[0027] In this technical solution, since the mechanical device provided according to the embodiment of the present invention includes the rocker arm according to any embodiment of the present invention, it has all the beneficial effects of the rocker arm according to any embodiment of the present invention.

[0028] Additional aspects and advantages of embodiments according to the present invention will become apparent in the following description or may be learned through practice of embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the embodiments of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 It is one of the partial cross-sectional structural schematic diagrams of the rocker arm according to some embodiments of the present invention;

[0031] Figure 2 for Figure 1 A magnified view of part A;

[0032] Figure 3 The second schematic diagram of the partial cross-sectional structure of the rocker arm according to some embodiments of the present invention;

[0033] Figure 4 for Figure 3 A magnified view of part B;

[0034] Figure 5 Schematic diagram of the composition of mechanical equipment according to some embodiments of the present invention.

[0035] in, Figures 1 to 5 The corresponding relationship between the reference numerals and component names in the figure is:

[0036] 10: mechanical equipment; 100: rocker arm; 110: housing; 112: notch; 120: connecting frame; 122: groove; 130: first fastener; 132: screw; 134: first nut; 136: second nut; 140: first guard plate; 150: guard cap; 160: second guard plate; 170: second fastener; 180: positioning assembly; 182: positioning pin; 184: positioning stop; 200: equipment body. DETAILED DESCRIPTION

[0037] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments according to the present invention. However, the embodiments according to the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the embodiments according to the present invention is not limited to the specific embodiments disclosed below.

[0039] Refer to the following Figures 1 to 5 A rocker arm 100 and a mechanical device 10 are described according to some embodiments of the present invention.

[0040] Example 1

[0041] like Figure 1 As shown, this embodiment provides a rocker arm 100, including: a housing 110 and a connecting frame 120, wherein the housing 110 is provided with a notch 112, and the open end of the notch 112 extends to the end surface of the housing 110. The connecting frame 120 is provided at one end of the housing 110 close to the notch 112. The first fastener 130 is used to connect the housing 110 and the connecting frame 120, and one end of the first fastener 130 extends into the notch 112. The notch 112 and the first fastener 130 are respectively provided in a plurality in a one-to-one correspondence.

[0042] In this embodiment, the rocker arm 100 includes a rocker arm body and a housing 110, wherein the housing 110 is disposed outside the rocker arm body, and the connecting frame 120 is connected to the rocker arm body through the housing 110. In order to ensure that the housing 110 and the connecting frame 120 can be connected firmly, a plurality of first fasteners 130 can be arranged along the housing 110 or the connecting frame 120 in the axial circumferential direction. The plurality of first fasteners 130 are spaced apart from each other and evenly distributed. The first fastener 130 can be integrally formed into a rod-shaped structure, and one end of the first fastener 130 penetrates the connecting frame 120 so that the first fastener 130 can be connected to the connecting frame 120. The other end of the first fastener 130 extends into the housing 110 so that the first fastener 130 can be connected to the housing 110. By setting a notch 112 on the shell 110, the first fastener 130 extends into the notch 112. When the first fastener 130 breaks, since the open end of the notch 112 extends to the surface of the shell 110, the broken part of the first fastener 130 can be easily removed, which facilitates the disassembly and replacement of the first fastener 130, thereby ensuring that the rocker arm 100 can continue to be used. When the rocker arm 100 is applied to a coal mining machine, the normal use of the coal mining machine is guaranteed.

[0043] Example 2

[0044] like Figure 2 As shown, this embodiment provides a rocker arm 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0045] The first fastener 130 includes a screw rod 132, a first nut 134, and a second nut 136. The screw rod 132 passes through the connecting frame 120, and one end of the screw rod 132 extends into the slot 112. The first nut 134 is disposed in the slot 112, and the first nut 132 is sleeved on the screw rod 132. The second nut 136 is sleeved on one end of the screw rod 132 away from the first nut 132.

[0046] In this embodiment, the first fastener 130 mainly includes a screw rod 132, a first nut 134 and a second nut 136. The housing 110 and the connecting frame 120 are respectively provided with threaded holes for passing the screw rod 132. The first nut 132 is arranged in the notch 112 for tightening and fixing the connection between the screw rod 132 and the housing 110. The second nut 136 is used to tighten and fix the connection between the screw rod 132 and the connecting frame 120. More specifically, a square nut can be selected as the first nut 134, which is easy to install and use. The screw rod 132 can be a stud, and the super nut can be used as the second nut 136. The working principle of the super nut is to use the friction between the nut and the bolt for self-locking, which is a loosening prevention measure. The working process of the super nut is that when the top screw is tightened, the thrust generated directly acts on the hard gasket. A high thrust can be obtained by applying a relatively small torque to the top screw. After manual positioning, the preload is transmitted by the nut body. Hard gaskets are used to transfer preload and protect the nut body and flange surface. The thrust generated by the top screw and the reaction force of the bolt head achieve a tight connection. The top push nut is a kind of super nut. There is a circle of small screws on the nut, which is tightened step by step. Ordinary torque wrenches can also achieve extremely high tightening force. It can be used in places with heavy loads and vibrations, and is easy to install and disassemble.

[0047] In this embodiment, the housing 110 is designed with a U-shaped groove structure as the notch 112, and the notch 112 is subjected to quenching and tempering treatment to improve the structural strength and hardness of the notch 112, so as to prevent the first nut 134 from crushing the butt surface of the housing 110 and the connecting frame 120. When the stud bolt breaks in the notch 112, the broken screw rod 132 and the first nut 134 can be directly taken out from the notch 112. When the screw rod 132 breaks in the threaded hole of the connecting frame 120, all the screw rods 132 connecting the housing 110 and the connecting frame 120 are disassembled, and the housing 110 and the connecting frame 120 are separated, so that the broken screw rod 132 and the first nut 134 can be taken out.

[0048] Example 3

[0049] like Figure 2 As shown, this embodiment provides a rocker arm 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0050] A groove 122 is defined in the connecting frame 120 , and the second nut 136 is disposed in the groove 122 .

[0051] In this embodiment, in order to increase the structural strength of the connecting frame 120, a plurality of grooves 122 are provided on the side of the connecting frame 120, and one end of each screw rod 132 away from the first nut 134 penetrates the connecting frame 120 and then extends into the corresponding groove 122, making the connection more convenient. The groove 122 can be replaced by a frame structure, and the frame structure is connected to the connecting frame 120, so that the second nut 136 can act in the groove 122 when subjected to force, thereby avoiding direct force on the connecting frame 120 and increasing the service life of the connecting frame 120.

[0052] Example 4

[0053] like Figure 2 As shown, this embodiment provides a rocker arm 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0054] The groove 122 is provided with open structures at opposite ends for passing the screw rod 132 . The groove 122 is provided with a protective cap 150 at the open structure away from the first nut 134 . The protective cap 150 is connected to the connecting frame 120 through the groove 122 .

[0055] In this embodiment, the opposite ends of the groove 122 may be provided with open structures respectively, so that the screw rod 132 can pass through. The second nut 136 is placed in the groove 122. The second nut 136 is sleeved on the screw rod 132 and can be used to tighten the connection between the screw rod 132 and the connecting frame 120. The protective cap 150 is provided on the open structure of the groove 122, used to block the groove 122, and can be used to protect the second nut 136.

[0056] Example 5

[0057] like Figure 2 As shown, this embodiment provides a rocker arm 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0058] The rocker arm 100 further includes a first guard plate 140 , which is disposed on the connecting frame 120 and is located outside the groove 122 for protecting the second nut 136 .

[0059] In this embodiment, the first guard plate 140 is connected to the connecting frame 120 and is located outside the groove 122 to protect the second nut 136. Since the screw rod 132 is provided in plurality, the first guard plate 140 is also provided in plurality on the connecting frame 120 accordingly.

[0060] Example 6

[0061] like Figure 2As shown, this embodiment provides a rocker arm 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0062] The rocker arm 100 further includes a second fastener 170 , one end of which is connected to the connecting frame 120 , and the other end of which is connected to the screw rod 132 .

[0063] In this embodiment, the second fastener 170 is used to connect the screw rod 132 and the connecting frame 120, which can further improve the anti-fracture performance of the screw rod 132 and increase the structural stability of the screw rod 132 connecting the housing 110 and the connecting frame 120. Specifically, a fastening screw can be used as the second fastener 170. A countersunk hole is opened in the protective cap 150, and a threaded hole is opened at the end of the screw rod 132, which can be used to penetrate a screw to connect the screw rod 132 and the protective cap 150, which can not only further increase the structural stability of the screw rod 132, but also make the structure of the protective cap 150 more stable.

[0064] Example 7

[0065] like Figure 2 As shown, this embodiment provides a rocker arm 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0066] The rocker arm 100 further includes a second guard plate 160 . The second guard plate 160 is disposed on the housing 110 , and the second guard plate 160 is located between the notch 112 and the connecting frame 120 .

[0067] In this embodiment, the second guard plate 160 is connected to the housing 110, and the second guard plate 160 is located between the notch 112 and the connecting frame 120, and can protect the first fastener 130. Specifically, since the screw rod 132 of the first fastener 130 penetrates into the housing 110, the second guard plate 160 can mainly protect the screw rod 132. Since the screw rod 132 is provided in plurality, the second guard plate 160 is also provided in plurality on the housing 110 accordingly.

[0068] Example 8

[0069] like Figure 3 and Figure 4 As shown, this embodiment provides a rocker arm 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0070] The rocker arm 100 further includes a positioning assembly 180 , which is disposed between the housing 110 and the connecting frame 120 and is used to position the housing 110 and the connecting frame 120 .

[0071] In this embodiment, the positioning assembly 180 is disposed between the connecting frame 120 and the housing 110, and is used to position the housing 110 and the connecting frame 120. After the screw rod 132 is fastened by the first nut 134 and the second nut 136, it can be ensured that the screw rod 132 can be connected without loosening, thereby preventing or reducing the risk of the screw rod 132 breaking.

[0072] Example 9

[0073] like Figure 4 As shown, this embodiment provides a rocker arm 100. In addition to the technical features of the above embodiment, this embodiment also includes the following technical features:

[0074] The positioning assembly 180 includes: a positioning pin 182 and a positioning stop 184 , the positioning pin 182 is connected between the housing 110 and the connecting frame 120 ; and / or the positioning stop 184 is provided between the housing 110 and the connecting frame 120 .

[0075] In this embodiment, the positioning pin 182 is connected and arranged between the connecting frame 120 and the shell 110, wherein the two ends of the positioning pin 182 are respectively inserted into the connecting frame 120 and the shell 110 to achieve relative fixation between the connecting frame 120 and the shell 110. The positioning pin 182 can be set in multiple numbers and arranged along the shell 110 or the connecting frame 120 in the axial circumferential direction, so that the positioning of the connecting frame 120 and the shell 110 is more secure. The positioning stop 184 includes a protruding portion and a recessed portion, wherein the protruding portion is inserted into the recessed portion, and the concave and convex fit can be used to achieve the positioning of the connecting frame 120 and the shell 110. The protruding portion can be set on the connecting frame 120, and the recessed portion is set in the shell 110. Or the protruding portion is set on the shell 110, and the recessed portion is set in the connecting frame 120.

[0076] Example 10

[0077] like Figure 5 As shown, this embodiment provides a mechanical device 10, including: a device body 200 and a rocker arm 100 in any embodiment. At least a portion of the rocker arm 100 is connected to the device body 200.

[0078] In this embodiment, the mechanical equipment 10 may specifically be a coal mining machine. Since the mechanical equipment 10 provided according to the embodiment of the present invention includes the rocker arm 100 according to any embodiment of the present invention, it has all the beneficial effects of the rocker arm 100 according to any embodiment of the present invention.

[0079] Embodiment 11

[0080] like Figure 2 and Figure 4As shown, this embodiment provides a housing 110, including: housing 110, first nut 134, first guard plate 140, screw 132 composed of studs, connecting frame 120, second guard plate 160, second nut 136, protective cap 150, positioning stop 184, outer stop of connecting frame 120 and inner stop of housing 110 cooperate with each other, and positioning pin 182. Among them, housing 110 and connecting frame 120 are fastened by first nut 134, screw 132 and second nut 136. Figure 1 and Figure 3 As shown, the housing 110 and the connecting frame 120 are positioned by the positioning stop 184 and the positioning pin 182. The first guard plate 140, the second guard plate 160 and the protective cap 150 play a role in protecting the screw rod 132 and the second nut 136.

[0081] The housing 110 is designed with a U-shaped groove structure and is quenched and tempered to prevent the first nut 134 from crushing the docking surface of the housing 110. When the screw rod 132 breaks within the U-shaped groove of the housing 110, the broken screw rod 132 and the first nut 134 can be directly taken out from above the housing 110. When the screw rod 132 breaks in the threaded inner hole of the connecting frame 120, the broken screw rod 132 and the first nut 134 can be taken out by disassembling all the screw rods 132 connecting the housing 110 and the connecting frame 120, and then separating the housing 110 from the connecting frame 120.

[0082] In this embodiment, Figure 3 and Figure 4 As shown, the double positioning structure of the positioning stop 184 and the positioning pin 182 can ensure that the screw 132 is not loose after being fastened by the second nut 136. If the screw 132 is not loose, it will not break.

[0083] In this embodiment, the rocker arm 100 for the coal mining machine is connected to the connecting frame 120 through the housing 110, wherein the housing 110 and the connecting frame 120 are connected in a structural form in which the screw rod 132 is connected to the housing 110 and the connecting frame 120 respectively through internal threads, and a push nut is used as the second nut 136, and a protective cap 150 is provided on the outside of the second nut 136 as a protective cover. The problem of the screw rod 132 being loosened by vibration and disassembled after being broken is solved.

[0084] In summary, the beneficial effects of the embodiments of the present invention are as follows:

[0085] 1. The housing 110 is provided with a notch 112 to facilitate the disassembly of the connecting frame 120 and the housing 110 after the screw rod 132 is broken.

[0086] 2. The double positioning structure consisting of the positioning pin 182 and the positioning stop 184 can prevent the connection of the screw 132 from loosening after the screw 132 is fastened by the second nut 136, thereby preventing the screw 132 from breaking or reducing the risk of breaking.

[0087] In the embodiments according to the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments according to the present invention can be understood according to specific circumstances.

[0088] In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the embodiments of the present invention.

[0089] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments according to the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0090] The above are only preferred embodiments according to the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various modifications and changes may be made according to the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention shall be included in the protection scope of the embodiments of the present invention.

Claims

1. A rocker arm, characterized in that: include: A shell body, provided with a notch, wherein an opening end of the notch extends to an end surface of the shell body; A connecting frame, arranged at one end of the housing close to the notch; A first fastener, used to connect the housing and the connecting frame, one end of the first fastener extending into the notch; Wherein, the notches correspond to the first fasteners in a one-to-one manner and are respectively provided in plurality; The first fastener comprises: A screw rod passes through the connecting frame, and one end of the screw rod extends into the notch; A first nut is disposed in the notch and sleeved on the screw rod; A second nut, sleeved on an end of the screw rod away from the first nut; The shell and the connecting frame are respectively provided with threaded holes, the screw rod is a stud, the second nut is used to tighten and fix the connection between the screw rod and the connecting frame, and the U-shaped groove structure serves as the notch; A groove is provided in the connecting frame, and the second nut is arranged in the groove; A plurality of the grooves are arranged on the side of the connecting frame, and one end of each of the screw rods away from the first nut penetrates through the connecting frame and extends into the corresponding groove.

2. The rocker arm according to claim 1, characterized in that: The groove is provided with open structures at two opposite ends for passing the screw rod, and the groove is provided with a protective cap at the open structure away from the first nut, and the protective cap is connected to the connecting frame through the groove.

3. The rocker arm according to claim 1, characterized in that: Also includes: A first guard plate is arranged on the connecting frame, and the first guard plate is located outside the groove, and is used to protect the second nut.

4. The rocker arm according to claim 1, characterized in that: Also includes: A second fastener has one end connected to the connecting frame and the other end connected to the screw rod.

5. The rocker arm according to claim 1, characterized in that: Also includes: The second guard plate is arranged on the shell, and the second guard plate is located between the notch and the connecting frame.

6. The rocker arm according to any one of claims 1 to 5, characterized in that: Also includes: A positioning assembly is disposed between the shell and the connecting frame and is used for positioning the shell and the connecting frame.

7. The rocker arm according to claim 6, characterized in that: The positioning component comprises: A positioning pin connected between the housing and the connecting frame; and / or A positioning stop is arranged between the shell and the connecting frame.

8. A mechanical device, characterized in that: include: Equipment body; The rocker arm according to any one of claims 1 to 7; Wherein, at least a portion of the rocker arm is connected to the device body.

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