Rocker arm connecting rod with good sealing performance

Abstract

The utility model discloses a rocker arm connecting rod with good sealing performance, which comprises a connecting hole arranged on a rocker arm. The connecting shaft is arranged on the connecting rod and is positioned in the connecting hole; the sealing ring is arranged in the connecting hole and abuts against the outer wall of the connecting shaft in a sealed mode. An annular lip is arranged at one end of the sealing ring; a guide angle is arranged at the tail end of the inner wall of the lip; a framework is arranged in the sealing ring; a reinforcing ring is arranged at one end of the framework. When the connecting shaft is inserted into the sealing ring, the guide angle can prevent the lip from deforming, the framework improves the deformation resistance of the sealing ring, and muddy water and mud sand are prevented from entering the sealing ring. The guide angle facilitates insertion of the connecting shaft, prevents deformation of the lip, and increases the contact area between the lip and the connecting shaft. The sealing block tightly abuts against the connecting shaft, enough space is reserved for deformation of the sealing block, and the sealing ring is prevented from protruding and deforming.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing rings, and in particular relates to a rocker arm connecting rod with good sealing performance. Background Art

[0002] The rocker arm connecting rod is a mechanical structure, mainly composed of a connecting rod and a rocker arm. In different application fields, the rocker arm connecting rod may have different forms and functions. In mechanical equipment, the rocker arm connecting rod usually plays the role of connecting and transmitting force. Its design and manufacturing need to consider issues such as material selection, strength calculation, and force analysis. The rocker arm needs to maintain good sealing during operation to prevent dust and other impurities from entering the machine and affecting its normal operation.

[0003] The Chinese patent document with announcement number CN213744922U discloses a PSAY type rocker arm sealing ring with good sealing performance, including a PSAY type rocker arm sealing ring body, the outer end of the PSAY type rocker arm sealing ring body is cooperated with a PSAY type rocker arm sealing layer, the outer end of the PSAY type rocker arm sealing ring body is provided with a layer of PSAY type rocker arm front sealing ring, the inner end of the PSAY type rocker arm sealing ring body is provided with a layer of PSAY type rocker arm inner sealing ring, the PSAY type rocker arm inner sealing ring and the PSAY type rocker arm front sealing ring form a PSAY type rocker arm sealing groove on the PSAY type rocker arm sealing ring body, the PSAY type rocker arm sealing groove is cooperated with a PSAY type rocker arm sealing tooth, and the PSAY type rocker arm sealing ring body, the PSAY type rocker arm front sealing ring and the PSAY type rocker arm inner sealing ring are cast as one piece.

[0004] The sealing structure in the above patent solution is a pure rubber design, which does not take into account the overall deformation of the rubber and the deformation and displacement of the sealing lip during the assembly of the rocker arm connecting rod shaft. After the connecting rod shaft is installed, the rubber sealing ring is displaced and the lip is turned inward, which will seriously affect the service life of the sealing ring. Utility Model Content

[0005] In order to overcome the technical problem that the sealing ring structure of pure rubber design in the prior art will cause overall deformation or sealing lip deformation during the assembly of the rocker arm connecting rod, one purpose of the utility model is to provide a rocker arm connecting rod with good sealing performance, by adding a skeleton for supporting positioning in the rubber sealing ring and increasing the installation guide angle on the sealing lip, so that the shaft can smoothly penetrate the sealing ring, and the deformation of the rubber structure can be eliminated, thereby improving the sealing performance of the product and extending its service life.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a rocker arm connecting rod with good sealing performance, comprising a connecting hole, which is arranged on the rocker arm; a connecting shaft, which is arranged on the connecting rod and is located in the connecting hole; a sealing ring, which is arranged in the connecting hole and seals against the outer wall of the connecting shaft; wherein an annular lip is arranged at one end of the sealing ring; a guide angle is arranged at the end of the inner wall of the lip; a skeleton is arranged in the sealing ring; and a reinforcement ring is arranged at one end of the skeleton.

[0007] The skeleton increases the structural strength of the sealing ring and limits the deformation of the sealing ring; at the same time, when the connecting shaft is inserted into the sealing ring, the guide angle facilitates the insertion of the connecting shaft without causing flanging and deformation of the lip, thereby increasing the sealing effect of the sealing ring and allowing the connecting shaft to smoothly enter the sealing ring while blocking mud, water and sand from entering the connecting hole, reducing the wear of the lip, improving the sealing performance of the product and extending its service life.

[0008] Furthermore, the guide angle is an annular cutout arranged at the end edge of the inner wall of the lip; the annular cutout has two inner walls; the angle between the two inner walls is greater than 110° and less than 180°.

[0009] Furthermore, one of the two inner walls is parallel to the axial direction of the sealing ring, and the other inner wall is inclined toward the inside of the sealing ring.

[0010] During the process of inserting the connecting shaft into the sealing ring, the connecting shaft abuts against the inclined inner wall and applies pressure thereto, causing the lip to deform elastically. The volume of the lip is much larger than the deformation volume of the inner wall, thereby preventing the lip from flanging, increasing the convenience of assembly and the service life of the sealing ring. As the connecting shaft is inserted, the parallel inner wall seals against the outer wall of the connecting shaft, increasing the contact area between the lip and the connecting shaft, thereby improving the sealing effect of the sealing ring.

[0011] Specifically, the reinforcement ring is located at one end of the frame close to the lip; the reinforcement ring extends in the direction of the axis of the sealing ring.

[0012] The radial cross section of the skeleton is L-shaped, which can resist deformation of the skeleton, increase the strength of the skeleton, and further improve the anti-deformation ability of the sealing ring.

[0013] Furthermore, a plurality of sealing blocks are arranged on the inner wall of the sealing ring; and the sealing blocks are evenly spaced and distributed along the circumferential direction of the sealing ring.

[0014] Specifically, one end of each sealing block away from the lip is flush with one end of the sealing ring away from the lip.

[0015] Specifically, the circumferential width of the sealing block is greater than the gap between two adjacent sealing blocks.

[0016] The sealing block can improve the sealing effect of the sealing ring. The sealing block and the connecting shaft have an interference fit to achieve sealing, and can also prevent the sealing ring from separating from the connecting shaft. The gap between two adjacent sealing blocks leaves enough space for the deformation of the sealing blocks, thereby preventing the sealing ring from bulging and causing excessive wear on the connecting shaft, thereby increasing the service life of the sealing ring.

[0017] Furthermore, outer concave rings are respectively provided at both ends of the outer wall of the sealing ring; the diameter of the outer concave ring is smaller than the diameter of the sealing ring.

[0018] The outer concave ring facilitates the sealing ring to be inserted into the connecting hole for matching installation, thereby increasing the convenience of assembly.

[0019] Furthermore, the connecting shaft includes a thick shaft and a thin shaft; the thin shaft is arranged at the central position of one end of the thick shaft, and the diameter of the thin shaft is smaller than the diameter of the thick shaft; an inner convex ring is arranged in the connecting hole; the inner convex ring is respectively abutted against the outer wall of the thin shaft and the end of the thick shaft close to the thin shaft; the sealing ring is arranged on the side of the inner convex ring close to the thick shaft; the lip is arranged on the side of the sealing ring away from the inner convex ring.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. When the connecting shaft is inserted into the sealing ring of the connecting hole, the setting of the guide angle increases the convenience of insertion and prevents the lip from flanging or deformation. At the same time, the setting of the skeleton increases the anti-deformation ability of the sealing ring, prevents muddy water and sand from entering the connecting hole, and increases the service life of the rocker arm connecting rod and the sealing ring.

[0022] 2. The setting of the two inner walls of the guide angle, on the one hand, facilitates the insertion of the connecting shaft and prevents the lip from deformation, and on the other hand, increases the contact area between the lip and the connecting shaft, thereby increasing the sealing effect.

[0023] 3. The sealing block is tightly against the connecting shaft, while sufficient space is reserved for the deformation of the sealing block. This can prevent the sealing ring from convexly deforming during the movement of the connecting shaft relative to the connecting hole, further ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the configuration structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the sealing ring structure of the utility model;

[0026] Figure 3 It is a schematic diagram of the radial cross-section structure of the utility model.

[0027] In the figure: 1, connecting hole; 11, inner convex ring; 2, connecting shaft; 3, skeleton; 31, reinforcement ring; 4, sealing ring; 41, sealing block; 42, lip; 43, outer concave ring; 44, guide angle; 45, chamfer; 46, gap. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0029] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise specified and limited, the terms "setting", "installation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] See also Figure 1-Figure 3 ,like Figure 1As shown, a rocker arm connecting rod with good sealing performance includes a connecting hole 1 arranged on the rocker arm, a connecting shaft 2 arranged on the connecting rod and a sealing ring 4 arranged in the connecting hole 1; the connecting shaft 2 is located in the sealing ring 4; the connecting hole 1, the connecting shaft 2 and the sealing ring 4 are all coaxially arranged; the connecting shaft 2 includes a thick shaft and a thin shaft arranged at the center of the lower end of the thick shaft; the diameter of the thin shaft is smaller than the diameter of the thick shaft; an inner convex ring 11 is arranged in the middle of the connecting hole 1; the inner convex ring 11 is respectively abutted against the outer wall of the thin shaft and the lower end of the thick shaft; the sealing ring 4 is arranged on the side of the inner convex ring 11 close to the thick shaft.

[0033] like Figure 1 , 2 As shown, the upper end of the sealing ring 4 is provided with an annular lip 42 inclined toward the middle of the sealing ring 4; the end of the inner wall of the lip 42 is provided with a guide angle 44; a skeleton 3 is provided in the sealing ring 4; the end of the skeleton 3 close to the lip 42 is provided with a reinforcement ring 31 extending toward the middle of the skeleton 3; the radial cross-section of the skeleton 3 is L-shaped; the inner wall of the sealing ring 4 is provided with a plurality of sealing blocks 41 evenly spaced along the circumferential direction of the sealing ring 4; the end of each sealing block 41 away from the lip 42 is flush with the end of the sealing ring 4 away from the lip 42; the circumferential width of the sealing block 41 is greater than the gap 46 between two adjacent sealing blocks 41; the end of the sealing block 41 away from the lip 42 is located on the inner side of the sealing ring 4 and is provided with a chamfer 45.

[0034] like Figure 3 As shown, the guide angle 44 is an annular cutout arranged at the end edge of the inner wall of the lip 42; the annular cutout has two inner walls with an angle greater than 110° and less than 180°; one of the two inner walls is parallel to the axial direction of the sealing ring 4, and the other inner wall is inclined toward the inside of the sealing ring 4; both ends of the outer wall of the sealing ring 4 are respectively provided with outer concave rings 43 with a diameter smaller than the diameter of the sealing ring 4.

[0035] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A rocker arm connecting rod with good sealing performance, Features: It includes a connecting hole, and the connecting hole is arranged on the rocker arm; A connecting shaft, the connecting shaft is arranged on the connecting rod and is located in the connecting hole; A sealing ring is arranged in the connecting hole and is sealed against the outer wall of the connecting shaft; wherein an annular lip is arranged at one end of the sealing ring; a guide angle is arranged at the end of the inner wall of the lip; a frame is arranged in the sealing ring; a reinforcement ring is arranged at one end of the frame.

2. The rocker arm connecting rod according to claim 1, Features: The guide angle is an annular cutout arranged at the end edge of the inner wall of the lip; the annular cutout has two inner walls; the angle between the two inner walls is greater than 110° and less than 180°.

3. The rocker arm connecting rod according to claim 2, Features: One of the two inner walls is parallel to the axial direction of the sealing ring, and the other inner wall is inclined toward the inside of the sealing ring.

4. The rocker arm connecting rod according to any one of claims 1 to 3, Features: The reinforcement ring is located at one end of the frame close to the lip; the reinforcement ring extends in the direction of the axis of the sealing ring.

5. The rocker arm connecting rod according to any one of claims 1 to 3, Features: The inner wall of the sealing ring is provided with a plurality of sealing blocks; the sealing blocks are evenly spaced and distributed along the circumferential direction of the sealing ring.

6. The rocker arm connecting rod according to claim 4, Features: The inner wall of the sealing ring is provided with a plurality of sealing blocks; the sealing blocks are evenly spaced and distributed along the circumferential direction of the sealing ring.

7. The rocker arm connecting rod according to claim 5, Features: One end of each sealing block away from the lip is flush with one end of the sealing ring away from the lip.

8. The rocker arm connecting rod according to claim 5, Features: The circumferential width of the sealing block is greater than the gap between two adjacent sealing blocks.

9. The rocker arm connecting rod according to any one of claims 1 to 3, Features: Outer concave rings are respectively arranged at two ends of the outer wall of the sealing ring; the diameter of the outer concave ring is smaller than the diameter of the sealing ring.

10. The rocker arm connecting rod according to any one of claims 1 to 3, Features: The connecting shaft includes a thick shaft and a thin shaft; the thin shaft is arranged at the central position of one end of the thick shaft, and the diameter of the thin shaft is smaller than the diameter of the thick shaft; an inner convex ring is arranged in the connecting hole; the inner convex ring is respectively abutted against the outer wall of the thin shaft and the end of the thick shaft close to the thin shaft; the sealing ring is arranged on the side of the inner convex ring close to the thick shaft; the lip is arranged on the side of the sealing ring away from the inner convex ring.

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