Manual transmission shift lever seal structure

Abstract

The utility model discloses a manual gearbox gear lever sealing structure, including the upper and lower sealing cover body of outside along adaptation adhesion, the middle part of upper sealing cover body has the annular convex portion of stair -like that extends upwards and is integrative, the top center of stair -like annular convex portion is equipped with the gear lever upper perforation, and the mouth of gear lever upper perforation is folded and forms the annular sealing edge of being wrapped in the gearbox gear lever wall in the upward direction, the middle part of lower sealing cover body has the conical platform recess that extends downwards and is integrative, and the bottom wall center of conical platform recess is equipped with the gear lever lower perforation corresponding with gear lever upper perforation, and the bottom wall on conical platform recess outer periphery located gear lever lower perforation has annular upper convex. The utility model has the advantages of forming the double -layer sealing structure of being sleeved on the gearbox gear lever, forms a sealed chamber simultaneously, improves structural sealing property, effectively insulates the noise that produces when operating gearbox gear lever and enters the car, reduces the noise in the car, improves the purpose of the comfort of driving and riding.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to a sealing structure for a manual transmission gear lever. Background Technology

[0002] Manual transmissions are widely used in commercial vehicles. However, because the gear lever of a manual transmission is directly connected to the passenger compartment and the transmission is noisy during operation, the sealing of the gear shifting is related to the airtightness of the passenger compartment and the NVH (noise, vibration, and harshness) insulation performance of the entire passenger compartment.

[0003] The shift cover of the existing manual transmission shift lever is usually fixed on the vehicle's sub-dashboard. A single cover made of soft material (such as leather) forms a single-layer seal between the shift lever and the floor. This structure has weak sealing performance and limited isolation from the noise of the transmission operation, resulting in high noise in the vehicle's passenger compartment and affecting the driving and riding experience of the occupants. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a sealing structure for a manual transmission gear lever.

[0005] To achieve the above objectives, the present invention can adopt the following technical solution: The manual transmission gear lever sealing structure of this utility model includes an upper sealing cover and a lower sealing cover that fit together with the outer edge; the upper sealing cover has an integrally formed upward-extending stepped annular protrusion in the middle, and a gear lever upper through hole is opened at the top center of the stepped annular protrusion. The opening edge of the gear lever upper through hole is folded upward to form an annular sealing edge that wraps around the gear lever wall; the lower sealing cover has an integrally formed downward-extending truncated cone recess in the middle, and a gear lever lower through hole corresponding to the gear lever upper through hole is opened at the center of the bottom wall of the truncated cone recess. An annular upper protrusion is located on the bottom wall of the truncated cone recess located on the outer periphery of the gear lever lower through hole.

[0006] Furthermore, the stepped annular protrusion is formed by a multi-stage sealing ring platform with a diameter that gradually decreases from bottom to top, arranged coaxially, and adjacent sealing ring platforms are connected as one unit by an annular transition surface.

[0007] Furthermore, an annular pressure edge is pressed and fastened onto the outer surface of the upper sealing cover. Multiple fixing bolts are evenly distributed on the annular pressure edge. The fixing bolts pass through the annular pressure edge, the upper sealing cover, and the lower sealing cover in sequence from top to bottom, and are screwed and fixed to the vehicle's sub-dashboard. The annular pressure edge ensures that the upper and lower sealing covers are securely installed on the vehicle's sub-dashboard, while also improving the sealing performance at the edges of the upper and lower sealing covers.

[0008] Furthermore, a first positioning mark is provided on the upper surface of the upper sealing cover, and a second positioning mark is provided on the upper surface of the lower sealing cover, so as to facilitate the correct alignment of the installation direction of the upper and lower sealing covers during installation.

[0009] The advantage of this utility model lies in the fact that by using an upper sealing cover and a lower sealing cover that fit together with the outer edge, a double-layer sealing structure is formed on the gearbox gear lever. This effectively seals the part of the gearbox gear lever that passes through the cab while ensuring normal operation of the gearbox gear lever. At the same time, the stepped annular protrusion on the upper sealing cover and the conical truncated recess on the lower sealing cover form a sealed chamber between the two, improving the structural sealing performance and effectively isolating the noise generated when operating the gearbox gear lever from entering the vehicle, thereby reducing in-vehicle noise and improving driving comfort. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 yes Figure 1 Exploded view.

[0012] Figure 3 yes Figure 1 Side view of the upper sealing cover.

[0013] Figure 4 yes Figure 1 Side view of the lower sealing cover. Detailed Implementation

[0014] 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.

[0015] like Figure 1 , 2 As shown, the manual transmission gear lever sealing structure of this utility model includes an upper sealing cover 1 and a lower sealing cover 2. The outer edges of the upper sealing cover 1 and the lower sealing cover 2 are fitted together and match the gear lever through hole on the sub-dashboard between the driver and passenger seats of the vehicle, and can be fixedly installed on the through hole of the sub-dashboard to form a seal.

[0016] Specifically, such as Figure 3As shown, an upwardly extending stepped annular protrusion 3 is integrally formed in the middle of the upper sealing cover 1. The stepped annular protrusion 3 is coaxially arranged from multiple sealing ring platforms 3.1 whose diameter gradually decreases from bottom to top, and adjacent sealing ring platforms 3.1 are connected by an annular transition surface 3.2. At this time, a through hole 4 for the gear lever is opened at the top center of the stepped annular protrusion 3 (i.e., at the top wall center of the uppermost sealing ring platform 3.1). The opening edge of the through hole 4 for the gear lever is folded upward to form an annular sealing edge 5 that wraps around the gear lever wall of the gearbox. Figure 4 As shown, a downwardly extending truncated cone recess 6 is integrally formed in the middle of the lower sealing cover 2. A lower through hole 7, coaxial with the upper through hole 4 of the gear lever, is provided at the center of the bottom wall of the truncated cone recess 6. An annular upper protrusion 8, for enhancing support strength and resilience, is located on the bottom wall of the truncated cone recess 6 on the outer periphery of the lower through hole 7. The upper sealing cover 1 and the lower sealing cover 2 form a double-layer sealing structure fitted onto the gear shift lever, effectively sealing the through hole portion of the gear shift lever that enters the cab while ensuring normal operation. Simultaneously, the stepped annular protrusion 3 on the upper sealing cover 1 and the truncated cone recess 6 on the lower sealing cover 2 form a sealed chamber between them, improving structural sealing and effectively isolating noise generated during gear shift lever operation from entering the vehicle interior, thereby reducing interior noise and improving driving comfort.

[0017] In addition, to facilitate the installation of the upper sealing cover 1 and the lower sealing cover 2, an annular pressing edge 9 should be attached and pressed onto the outer surface of the upper sealing cover 1. Multiple fixing bolts 10 are evenly distributed on the annular pressing edge 9. The fixing bolts 10 pass through the annular pressing edge 9, the upper sealing cover 1 and the lower sealing cover 2 from top to bottom, and are screwed and fixed to the vehicle's sub-dashboard, forming a pressing and securing effect on the upper sealing cover 1 and the lower sealing cover 2. The annular pressing edge 9 can ensure that the upper sealing cover 1 and the lower sealing cover 2 are firmly installed on the vehicle's sub-dashboard, while improving the sealing performance at the edges of the upper sealing cover 1 and the lower sealing cover 2.

[0018] Furthermore, a first positioning mark 11 is provided on the upper surface of the upper sealing cover 1, and a second positioning mark 12 is provided on the upper surface of the lower sealing cover 2. The first positioning mark 11 and the second positioning mark 12 can facilitate the correct alignment of the installation direction of the upper sealing cover 1 and the lower sealing cover 2 during installation, so as to facilitate the quick completion of the installation work.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] In this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

Claims

1. A manual transmission gear lever sealing structure, characterized in that: The device includes an upper sealing cover and a lower sealing cover that fit together with the outer edge. The upper sealing cover has an integrally formed, upwardly extending, stepped annular protrusion in the middle. A through hole for a gear lever is provided at the top center of the stepped annular protrusion. The edge of the through hole for the gear lever is folded upward to form an annular sealing edge that wraps around the gear lever wall. The lower sealing cover has an integrally formed, downwardly extending, truncated cone recess in the middle. A lower through hole for a gear lever is provided at the center of the bottom wall of the truncated cone recess, corresponding to the through hole for the gear lever. An annular upper protrusion is located on the bottom wall of the truncated cone recess located on the outer periphery of the lower through hole for the gear lever.

2. The manual transmission gear lever sealing structure according to claim 1, characterized in that: The stepped annular protrusion is formed by a series of sealing ring platforms arranged coaxially from bottom to top with a diameter that gradually decreases. The sealing ring platforms of adjacent levels are connected as one unit by an annular transition surface.

3. The manual transmission gear lever sealing structure according to claim 1, characterized in that: An annular pressure edge is attached and pressed onto the outer surface of the upper sealing cover. Multiple fixing bolts are evenly distributed on the annular pressure edge. The fixing bolts pass through the annular pressure edge, the upper sealing cover, and the lower sealing cover from top to bottom, and are screwed and fixed to the vehicle's sub-dashboard.

4. The manual transmission gear lever sealing structure according to claim 1, characterized in that: A first positioning mark is provided on the upper surface of the upper sealing cover, and a second positioning mark is provided on the upper surface of the lower sealing cover.

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