Clutch cavity ventilation structure
By designing specific grooves and through-hole structures on the flange surface of the clutch housing, the ventilation requirements of the clutch cavity are achieved, the problems of poor ventilation and complex structure in the prior art are solved, and exhaust noise and machine are reduced Add cost.
Patent Information
- Application Number
- CN202420280988.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-05
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-02-05
AI Technical Summary
In the prior art, the clutch cavity of heavy commercial vehicles is poorly ventilated, resulting in high exhaust noise and additional exhaust devices are required, which increases the structural complexity of the clutch housing.
A clutch cavity ventilation structure is designed, and the gas discharge path is formed by setting up an inner edge groove, an outer edge groove, a bolt through hole and a flange surface groove on the flange surface of the clutch housing. Achieving the ventilation requirements of the clutch cavity.
This structure does not require adding ventilation plugs or processing special mounting holes. It only needs to be modified on the clutch housing blank to meet ventilation needs, reduce parts types and machine-added costs, and reduce exhaust noise.
Smart Images
Figure CN222502466U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heavy commercial vehicles and relates to a clutch cavity ventilation structure. Background Art
[0002] In the field of heavy-duty commercial vehicles, vehicles equipped with AMT generally use pneumatic shift actuators and central clutch actuators. Both of these actuators are driven by high-pressure gas, and the high-pressure gas needs to be discharged after each action. In order to reduce exhaust noise and improve vehicle NVH, most AMT actuators discharge residual high-pressure gas into the clutch cavity.
[0003] However, the clutch cavity is composed of the rear end housing of the engine and the clutch housing. After the transmission and the engine are assembled, there is almost no gap between the clutch housing and the rear end housing of the engine. If no additional exhaust device is provided, the clutch cavity may not be able to exhaust air to the outside world smoothly, thereby generating a large exhaust noise.
[0004] Currently, a common technical means is to add a special vent plug to the transmission clutch housing for exhaust, and it is necessary to process special vent plug mounting holes and other structures. Utility Model Content
[0005] The utility model aims to solve the problem in the prior art that an additional exhaust device needs to be provided, which results in a complicated structure of a clutch housing, and provides a clutch cavity ventilation structure.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] The utility model provides a clutch cavity ventilation structure, comprising a clutch housing; a ventilation structure is arranged on a flange surface of the clutch housing;
[0008] The ventilation structure includes an inner edge groove opened on the inner side of the clutch housing flange surface, an outer edge groove opened on the outer side of the flange surface, a bolt through hole on the flange surface and a flange surface groove excluding the bolt hole surface, and a bolt hole surface groove is opened on the bolt through hole; the inner edge groove is connected to the inside of the clutch cavity, the outer edge groove is connected to the atmosphere outside the clutch cavity, and the bolt hole surface groove is connected to the flange surface groove excluding the bolt hole surface.
[0009] Preferably, the clutch housing is connected to the rear end housing of the engine by means of fixing bolts and bolt through holes.
[0010] Preferably, the fixing bolt and the bolt through hole have a radial clearance fit.
[0011] Preferably, the inner edge groove, the bolt hole surface groove, the flange surface except the bolt hole surface groove and the outer edge groove are all lower than the clutch housing mounting flange surface at their lowest points.
[0012] Preferably, there are a plurality of the bolt through holes and the flange surface grooves excluding the bolt hole surfaces; the bolt through holes and the flange surface grooves excluding the bolt hole surfaces are alternately arranged.
[0013] Preferably, the bolt hole surface grooves are provided on some of the bolt through holes.
[0014] Preferably, there are two ventilation structures, and the two ventilation structures are symmetrically arranged.
[0015] Preferably, the inner edge groove and the outer edge groove are both arranged close to the groove on the flange surface excluding the bolt hole surface.
[0016] Preferably, the bolt hole surface groove is a strip-shaped structure.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] The utility model proposes a clutch cavity ventilation structure, which does not need to add a vent plug, and does not need to process a special vent plug installation hole on the clutch housing. It only needs to make changes on the clutch housing blank to meet the ventilation needs of the clutch cavity. Specifically, an inner edge groove is provided on the inner side of the clutch housing flange surface, an outer edge groove is provided on the outer side of the flange surface, and a bolt through hole and a flange surface groove excluding the bolt hole surface are provided on the flange surface. A bolt hole surface groove is opened on the bolt through hole, and then the inner edge groove is connected to the inside of the clutch cavity, the outer edge groove is connected to the atmosphere outside the clutch cavity, and the bolt hole surface groove is connected to the flange surface groove excluding the bolt hole surface groove. When working, the gas enters the flange surface groove excluding the bolt hole surface groove from the inner edge groove of the clutch housing above the clutch housing, and then passes through the bolt hole surface groove in sequence. The gas reaches the outer edge groove of the clutch housing from the side of the inner edge groove and is discharged from the clutch cavity, which can meet the ventilation needs of the clutch cavity. At the same time, compared with the existing vent plug structure, the types of parts are reduced and the machining cost is saved.
[0019] Furthermore, there are two ventilation structures, and the two ventilation structures are symmetrically arranged to make it easier to discharge the gas inside the clutch cavity.
[0020] Furthermore, the exhaust position is located below the transmission, which can prevent rainwater from above from entering the clutch cavity. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 This is a composition diagram of the installation surface of the clutch chamber ventilation structure of the utility model.
[0023] Figure 2 This is a structural diagram of the clutch housing of the present utility model.
[0024] Figure 3 This is a diagram showing the exhaust gas path of the clutch chamber of the utility model.
[0025] Figure 4 The figure is a diagram of the exhaust gas path at the bolt through hole of the clutch housing of the utility model.
[0026] Among them: 1-clutch housing, 2-fixing bolt, 3-engine rear end housing, 11-inner edge groove, 12-bolt hole surface groove, 13-flange surface excluding bolt hole surface groove, 14-outer edge groove, 15-bolt through hole. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0030] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does 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 therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0031] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0032] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0033] The utility model is further described in detail below with reference to the accompanying drawings:
[0034] The utility model proposes a clutch cavity ventilation structure, such as Figures 1 to 4 As shown, it includes a clutch housing 1, and a ventilation structure is provided on the flange surface of the clutch housing 1. There are two ventilation structures, and the two ventilation structures are symmetrically arranged.
[0035] The ventilation structure includes an inner edge groove 11 provided on the inner side of the flange surface of the clutch housing 1, an outer edge groove 14 provided on the outer side of the flange surface, a bolt through hole 15 provided on the flange surface, and a flange surface groove 13 excluding the bolt hole surface, wherein a bolt hole surface groove 12 is provided on the bolt through hole 15; the inner edge groove 11 is communicated with the inside of the clutch cavity, the outer edge groove 14 is communicated with the atmosphere outside the clutch cavity, and the bolt hole surface groove 12 is communicated with the flange surface groove 13 excluding the bolt hole surface. The clutch housing 1 is connected to the rear end housing 3 of the engine by means of a fixing bolt 2 and a bolt through hole 15, and the mounting surface of the rear end housing 3 of the engine is a plane without a groove structure. The fixing bolt 2 is matched with the bolt through hole 15 in radial clearance, and the black shadow part is the top view shape of the exhaust duct of the bolt hole surface groove 12, and the gap between the bolt through hole 15 and the fixing bolt 2 is for gas to pass through.
[0036] Among them, the inner edge groove 11, the bolt hole surface groove 12, the flange surface except the bolt hole surface groove 13 and the outer edge groove 14 are all lower than the mounting flange surface of the clutch housing 1 at their lowest points.
[0037] There are several bolt through holes 15 and flange surface excluding bolt hole surface grooves 13, which are arranged alternately. Some bolt through holes 15 are provided with bolt hole surface grooves 12, which are strip-shaped structures.
[0038] After the transmission is installed, the inner edge groove 11 and the outer edge groove 14 are both arranged close to the flange surface except for the bolt hole surface groove 13 and connected.
[0039] The utility model provides a clutch cavity ventilation structure, and the high pressure gas in the clutch cavity flows along the Figure 3 The arrow path shown, taking the exhaust path on the left as an example, enters the groove 13 on the flange surface except the bolt hole surface from the inner edge groove 11 of the clutch housing above the clutch housing, and then passes through the bolt hole surface groove 12 and the flange surface groove 13 at other positions in sequence, and the gas passes through the gap between the fixing bolt 2 and the bolt through hole 15, from one side of the hole surface groove to the other side of the hole surface groove, and finally reaches the outer edge groove 14 of the clutch housing and is discharged from the clutch cavity. The exhaust path on the right is similar.
[0040] Therefore, a clutch chamber ventilation structure proposed in the utility model has the following advantages: there is no need to add a vent plug, and there is no need to process a special vent plug mounting hole on the housing. Only changes need to be made to the clutch housing blank to meet the ventilation needs of the clutch chamber, reducing the types of parts and machining costs. The exhaust position is located below the transmission, which can prevent rainwater from above from entering the clutch chamber.
[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A clutch chamber ventilation structure, characterized in that: The invention comprises a clutch housing (1); a venting structure is provided on a flange surface of the clutch housing (1); The ventilation structure comprises an inner edge groove (11) provided on the inner side of the flange surface of the clutch housing (1), an outer edge groove (14) provided on the outer side of the flange surface, a bolt through hole (15) on the flange surface and a flange surface groove (13) excluding the bolt hole surface, wherein a bolt hole surface groove (12) is provided on the bolt through hole (15); the inner edge groove (11) is communicated with the inside of the clutch cavity, the outer edge groove (14) is communicated with the atmosphere outside the clutch cavity, and the bolt hole surface groove (12) is communicated with the flange surface groove (13) excluding the bolt hole surface.
2. The clutch cavity ventilation structure according to claim 1, characterized in that: The clutch housing (1) is connected to the rear end housing (3) of the engine by means of fixing bolts (2) and bolt through holes (15).
3. The clutch cavity ventilation structure according to claim 2, characterized in that: The fixing bolt (2) and the bolt through hole (15) are matched with radial clearance.
4. The clutch chamber ventilation structure according to claim 1, characterized in that: The inner edge groove (11), the bolt hole surface groove (12), the flange surface except the bolt hole surface groove (13) and the outer edge groove (14) are all lower than the clutch housing (1) mounting flange surface at their lowest points.
5. The clutch chamber ventilation structure according to claim 1, characterized in that: There are a plurality of bolt through holes (15) and a plurality of flange surface grooves (13) excluding bolt hole surfaces; the bolt through holes (15) and the flange surface grooves (13) excluding bolt hole surfaces are arranged alternately.
6. The clutch chamber ventilation structure according to claim 5, characterized in that: The bolt hole surface groove (12) is provided on some of the bolt through holes (15).
7. The clutch chamber ventilation structure according to claim 1, characterized in that: There are two ventilation structures, and the two ventilation structures are symmetrically arranged.
8. The clutch chamber ventilation structure according to claim 1, characterized in that: The inner edge groove (11) and the outer edge groove (14) are both arranged close to the flange surface excluding the bolt hole groove (13).
9. The clutch chamber ventilation structure according to claim 1, characterized in that: The bolt hole surface groove (12) is a strip-shaped structure.