Valve plate of gearbox

Abstract

The utility model provides a valve plate of a gearbox, and belongs to the technical field of machinery. The problems that the air tightness is poor and the yield is low due to the fact that the machining quality of the valve plate of an existing gearbox is unstable are solved. The valve plate of the gearbox comprises a body, the bottom face of the body is an abutting face used for being fixedly connected with a gearbox body, an air inlet channel which is horizontally and transversely arranged is formed in the middle of the body, the front end face and the rear end face of the body are each provided with an installation cavity used for installing an electromagnetic valve piston, and the inner ends of the installation cavities are both communicated with the air inlet channel. An air outlet is formed in the upper end face of the body and communicated with the air inlet channel, and the body is of an integrally-formed aluminum alloy forging structure. The valve plate of the gearbox has the advantages of being stable and reliable in machining quality and high in yield.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a valve plate, in particular to a valve plate of a gearbox. Background Art

[0002] The valve plate is a core actuator component in the new generation of automated manual transmissions (AMTs) for commercial vehicles, similar to the main control system. It is a complex housing with a complex spatial structure and numerous key actuators within. This requires high internal airtightness, as any airtightness issues can lead to transmission failure. Existing solutions utilize aluminum alloy die-casting. This process can produce complex parts, especially blanks with complex internal cavities, but the quality of die-cast parts is inconsistent.

[0003] For example, a multi-purpose valve plate support cover disclosed in a Chinese patent document (application number: 202320141954.9) includes a gearbox mounting surface and a valve plate mounting surface. The gearbox mounting surface is used to be installed in combination with the gearbox housing, and the valve plate mounting surface is used to be installed in combination with the valve plate. A number of warping grooves are provided on the gearbox mounting surface, which facilitate the disassembly of the valve plate support cover and the gearbox housing. A number of oil holes are provided on the valve plate mounting surface, which are used to achieve hydraulic control communication between the gearbox and the valve plate. However, the multi-purpose valve plate support cover is formed by one-piece die-casting, so its processing quality is unstable, resulting in poor air tightness and low yield. Summary of the Invention

[0004] The purpose of the utility model is to solve the above problems in the existing technology and to provide a valve plate for a gearbox with stable and reliable processing quality and high yield.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a valve plate of a gearbox, comprising a body, the bottom surface of the body being an abutment surface for being fixedly connected to the gearbox case, characterized in that a horizontally arranged air intake channel is provided in the middle portion of the body, and mounting cavities for mounting an electromagnetic valve piston are provided on both the front and rear end surfaces of the body, the inner ends of the mounting cavities are communicated with the air intake channel, an air outlet is provided on the upper end surface of the body and the air outlet is communicated with the air intake channel, and the body adopts an aluminum alloy forged integrally formed structure.

[0006] During operation, compressed air enters the intake passage. The solenoid valve plate, installed within the mounting cavity, opens and closes to alter the flow of air within the cavity, thereby implementing the transmission's shifting logic. Compared to the die-cast main body, the main body utilizes a one-piece forged aluminum alloy structure, eliminating pores during machining and offering stable, reliable processing quality and a high yield rate.

[0007] In the aforementioned transmission valve plate, the upper end surface of the body has a clearance groove, and the clearance groove is provided with a plurality of bolt holes, through which bolts pass to securely connect the body to the transmission housing. The bolts passing through the bolt holes securely connect the body to the transmission housing, thereby providing the advantages of a simple structure and a secure connection.

[0008] In the above-mentioned valve plate of a gearbox, a pressure relief hole is provided in the said recess and the said pressure relief hole is connected to the said air inlet passage. Pressure relief is achieved through the pressure relief hole connected to the air inlet passage, making the valve plate safe and reliable during operation.

[0009] In the valve plate of the transmission case, the upper end surface of the body is provided with a plurality of threaded holes 1 for fixing the wiring harness. By providing the threaded holes 1, the wiring harness is fixed to the body, which has the advantages of convenient connection and simple structure.

[0010] In the aforementioned transmission valve plate, two rows of connecting posts are provided on both front and rear end surfaces of the body, arranged parallel to each other on either side of the mounting cavity. A second threaded hole is provided in the middle of each connecting post, which is used to secure the solenoid valve. Securing the solenoid valve through the second threaded hole provides the advantages of a simple structure and a secure connection.

[0011] In the valve plate of the gearbox, a notch is provided on the side of the connecting column and the notch is connected to the threaded hole 2. The above arrangement facilitates the installation of the solenoid valve.

[0012] In the aforementioned transmission valve plate, a row of mounting cavities is provided on both the front and rear end surfaces of the body. These mounting cavities are used to mount the solenoid valve piston. An annular protrusion is located in the center of the mounting cavity. The upper end of the annular protrusion serves as a sealing surface for abutting the solenoid valve piston. The sealing surface divides the mounting cavity into cavity one and cavity two. The flow of compressed gas to cavity one or cavity two is controlled by the movement of the solenoid valve piston and whether the piston abuts against the annular protrusion, thereby implementing the shifting logic function. This design offers the advantages of simple structure and reliable and stable operation.

[0013] In the above-mentioned valve plate of a gearbox, the corners of the body are all rounded transitions, and the radius of the rounded corners is 3-8 mm. The above-mentioned arrangement improves the forging process, thereby increasing the yield rate.

[0014] Compared with the existing technology, the valve plate of the gearbox has the following advantages:

[0015] 1. The valve plate of this gearbox adopts aluminum alloy forging integral molding structure, which does not produce air holes during processing, and has the advantages of stable and reliable processing quality and high yield rate.

[0016] 2. The pressure relief hole connected to the air inlet channel realizes pressure relief, making the valve plate safe and reliable when working;

[0017] 3. By moving the piston of the solenoid valve and whether the piston is against the annular convex body, the compressed gas is controlled to flow to cavity one or cavity two to realize the shifting function, which has the advantages of simple structure and reliable and stable operation.

[0018] 4. The corners of the body are all rounded, and the radius of the rounded corners is 3-8mm, which improves the forging process and thus increases the yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of a valve plate of a gearbox.

[0020] Figure 2 This is a schematic diagram of the main view of a valve plate of a gearbox.

[0021] Figure 3 yes Figure 2 AA cross-sectional view of .

[0022] Figure 4 This is a schematic diagram of a valve plate of a gearbox viewed from above.

[0023] Figure 5 yes Figure 3 B is a partial enlarged schematic diagram.

[0024] In the figure, 1, main body; 1a, air inlet channel; 2, abutment surface; 3, mounting cavity; 3a, annular convex body; 3b, sealing surface; 3c, cavity one; 3d, cavity two; 4, air outlet; 5, clearance groove; 6, bolt hole; 7, pressure relief hole; 8, threaded hole one; 9, connecting column; 9a, threaded hole two; 9b, notch. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figures 1 to 5 As shown, a valve plate of a gearbox includes a body 1, the bottom surface of the body 1 is an abutment surface 2 for being fixedly connected to the gearbox case, and is characterized in that a horizontally arranged air intake channel 1a is provided in the middle part of the body 1, and mounting cavities 3 for mounting the solenoid valve piston are provided on the front and rear end surfaces of the body 1, and the inner ends of the mounting cavities 3 are connected to the air intake channel 1a, and an air outlet hole 4 is provided on the upper end surface of the body 1 and the air outlet hole 4 is connected to the air intake channel 1a. The body 1 adopts an aluminum alloy forged integral molding structure.

[0027] The upper end surface of the body 1 has a clearance groove 5, which is provided with several bolt holes 6. Bolts pass through these holes to secure the body 1 to the transmission case, resulting in a simple structure and a secure connection. A pressure relief hole 7 is provided in the clearance groove 5 and communicates with the air intake passage 1a.

[0028] The upper end surface of the main body 1 is provided with a plurality of threaded holes 8 for fixing the wiring harness. The wiring harness is fixed to the main body 1 through the threaded holes 8, which has the advantages of convenient connection and simple structure.

[0029] Two rows of connecting posts 9 are provided on both the front and rear ends of the body 1. These two rows of connecting posts 9 are arranged parallel to each other on either side of the mounting cavity 3. A second threaded hole 9a is provided in the middle of each connecting post 9 for securing the solenoid valve. A notch 9b is provided on the side of each connecting post 9, and this notch 9b communicates with the second threaded hole 9a, facilitating installation of the solenoid valve.

[0030] A row of mounting cavities 3 are provided on both the front and rear end surfaces of the main body 1. The middle part of the mounting cavity 3 has an annular convex body 3a, and the upper end of the annular convex body 3a is a sealing surface 3b. The sealing surface 3b is used to abut against the piston of the solenoid valve. The sealing surface 3b can divide the mounting cavity 3 into cavity 1 3c and cavity 2 3d.

[0031] The corners of the body 1 are all rounded, and the radius of the rounded corners is 3-8 mm, which improves the forging process and thus increases the yield.

[0032] During operation, compressed gas enters the intake channel 1a. The solenoid valve plate, mounted within the mounting chamber 3, controls the flow of compressed gas to either chamber 1 3c or chamber 2 3d by the movement of the solenoid valve piston and its contact with the annular projection 3a, thus implementing the transmission shift logic. This design offers the advantages of simple structure and reliable and stable operation. Compared to the die-cast body 1, the body 1 utilizes a one-piece forged aluminum alloy structure, eliminating pores during machining and resulting in stable, reliable processing quality and a high yield rate. Pressure relief is achieved through a pressure relief hole 7 connected to the intake channel 1a, contributing to the safe and reliable operation of this valve plate.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0034] Although this document frequently uses terms such as body 1, air inlet passage 1a, abutment surface 2, mounting cavity 3, annular protrusion 3a, sealing surface 3b, cavity 1 3c, cavity 2 3d, air outlet 4, clearance groove 5, bolt hole 6, pressure relief hole 7, threaded hole 1 8, connecting column 9, threaded hole 2 9a, and notch 9b, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations would be contrary to the spirit of the present invention.

Claims

1. A valve plate of a gearbox, comprising a body (1), wherein the bottom surface of the body (1) is abutting surface (2) for being fixedly connected to a gearbox housing, characterized in that: The middle part of the body (1) is provided with a horizontally arranged air intake channel (1a), the front and rear end surfaces of the body (1) are provided with mounting cavities (3) for mounting the solenoid valve piston, the inner ends of the mounting cavities (3) are connected to the air intake channel (1a), the upper end surface of the body (1) is provided with an air outlet hole (4) and the air outlet hole (4) is connected to the air intake channel (1a), and the body (1) adopts an aluminum alloy forging integral molding structure.

2. The valve plate of a gearbox according to claim 1, characterized in that: The upper end surface of the main body (1) is provided with a clearance groove (5), and a plurality of bolt holes (6) are provided in the clearance groove (5). Bolts pass through the bolt holes (6) to fix the main body (1) to the box body of the gearbox.

3. The valve plate of a gearbox according to claim 2, characterized in that: A pressure relief hole (7) is provided in the clearance groove (5), and the pressure relief hole (7) is connected to the air inlet channel (1a).

4. A valve plate for a gearbox according to claim 1, 2 or 3, characterized in that: The upper end surface of the main body (1) is provided with a plurality of threaded holes (8) for fixing the wiring harness.

5. A valve plate for a gearbox according to claim 1, 2 or 3, characterized in that: Two rows of connecting columns (9) are provided on both the front and rear end surfaces of the body (1), and the two rows of connecting columns (9) are arranged in parallel on both sides of the installation cavity (3). A second threaded hole (9a) is provided in the middle of the connecting column (9), and the second threaded hole (9a) is used to fix the solenoid valve.

6. The valve plate of a gearbox according to claim 5, characterized in that: A notch (9b) is provided on the side of the connecting column (9), and the notch (9b) is communicated with the second threaded hole (9a).

7. A valve plate for a gearbox according to claim 1, 2 or 3, characterized in that: The front and rear end surfaces of the main body (1) are each provided with a row of mounting cavities (3), the middle portion of the mounting cavity (3) has an annular convex body (3a), the upper end of the annular convex body (3a) is a sealing surface (3b), and the sealing surface (3b) is used to abut against the piston of the solenoid valve. The sealing surface (3b) can divide the mounting cavity (3) into cavity one (3c) and cavity two (3d).

8. A valve plate for a gearbox according to claim 1, 2 or 3, characterized in that: The corners of the body (1) are all rounded transitions, and the radius of the rounded corners is 3-8 mm.

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