A dual H-valve assembly for automotive transmissions with good sealing performance

Abstract

A dual-H valve assembly for automotive transmissions with good sealing performance includes a first channel within the bushing, with the lower ends of two sleeves positioned on a first stepped surface corresponding to the valve chamber, and the upper ends of the two sleeves abutting against the lower ends of their respective bushings. A second channel is provided within the sleeves, with a vent hole connecting to an air outlet. A first limiting protrusion is located at the lower end of the first channel. The upper valve core is positioned within the first channel, with its lower end smaller than its upper end. The upper end of the upper valve core is limited by the first limiting protrusion, and its lower end passes through the first limiting protrusion and rests within the sleeve. Advantages include: maintaining the original dual-H valve performance while continuously reducing switching force, improving guidance, reducing jamming, using dual-force compression to reduce leakage, and preventing leakage due to seal ring detachment; the upper valve core experiences low friction under bushing guidance, resulting in sensitive movement and reduced jamming; the upper valve core is better compressed and sealed under the dual forces of air source pressure and spring, reducing leakage; and the lower valve core seals more easily with the upper valve core.

Description

Technical Field

[0001] This invention relates to the field of valve body technology, and in particular to a double H valve assembly for automotive transmissions with good sealing performance. Background Technology

[0002] The applicant's prior application number is 202221958980.2; a double H valve assembly for an automotive transmission, comprising a valve body and a valve cover, wherein the valve body is provided with an air outlet, two valve chambers and control ports corresponding to each valve chamber, and a valve assembly is installed in each valve chamber, the valve cover is installed on the upper end of the valve body and is provided with an air inlet, the air inlet being connected to the control port through the valve assembly, the valve assembly comprising: a first sleeve, a second sleeve, a third sleeve, a fourth sleeve, a valve core and a return spring.

[0003] The applicant's prior application number is 202620403486.1; a double H valve assembly for an automotive transmission, comprising an air outlet, two valve chambers, and corresponding control ports within the valve body. Each valve chamber contains a valve assembly. A valve cover is mounted on the upper end of the valve body and has an air inlet. The air inlet is connected to the control port via the valve assembly. The valve assembly includes a bushing, a sleeve, a valve core, and a return spring. The bushing and sleeve combine to form a valve core cavity and are disposed within the valve chamber. The valve core is disposed within the valve core cavity, and a return spring is provided between the upper end of the valve core and the indentation of the valve cover. A return spring is used to connect the air inlet and the corresponding control port via the lower end of the valve core, which abuts against a push rod located at one end in the valve cavity. The upper end of the bushing has an upper flange extending into the concave space. The outer side of the upper flange has a first stepped surface that forms a limiting position with the concave wall. The lower end of the bushing has a thickened outer wall that fits snugly against the valve cavity wall. The lower end of the bushing has a second stepped surface that engages with the upper end of the sleeve. The lower end of the sleeve rests on the third stepped surface of the valve cavity of the valve body, forming a limiting position. The inner side of the upper end of the bushing has a limiting protrusion. The valve core flange at the upper end of the valve core cooperates with the limiting protrusion to form a limiting position. The existing double H valve is mainly used for gear shifting in commercial vehicle heavy truck series transmissions. Whether the driver can shift gears smoothly depends on whether the double H valve switches and works properly, so this product is very critical. There are problems such as jamming and air leakage. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a dual H-valve assembly for automotive transmissions with good sealing performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a double H valve assembly for automotive transmissions with good sealing performance, comprising a valve body and a valve cover. The valve body is provided with an exhaust port, two valve chambers, and an exhaust port. Each valve chamber is equipped with a valve assembly. The valve cover is installed on the upper end of the valve body and is provided with an intake port. The intake port is connected to the exhaust port through the valve assembly. The valve assembly includes: a bushing, a sleeve, an upper valve core, a lower valve core, and a return spring. The bushing and sleeve are combined to form a valve core cavity and are disposed within the valve chamber. The outer sides of the two bushings abut against the corresponding lower end of the valve cover. A first channel is provided inside the bushing, and the first channel maintains an air passage gap with the intake port. The two sleeves... The lower end is placed on the first step surface of the valve cavity, and the upper ends of the two sleeves abut against the lower ends of the corresponding bushings. A second channel is provided inside the sleeve, and a vent hole is opened in the second channel to connect to the air outlet. A spring is installed in the recess above the first channel corresponding to the lower end of the valve cover. A return spring is provided between the first channel and the spring installation recess. A first limiting protrusion is provided at the lower end of the first channel. The upper valve core is set in the first channel. The lower end of the upper valve core is smaller than the upper end of the upper valve core. The upper end of the upper valve core is limited by the first limiting protrusion. The lower end of the upper valve core passes through the first limiting protrusion and is placed in the sleeve. The lower end of the upper valve core and the lower valve core in the second channel of the sleeve work together with the push rod assembly in the valve cavity.

[0006] Furthermore, the upper valve core is provided with an upper channel and a lower channel, with a second step surface transitioning between the upper and lower channels. The upper end of the return spring abuts against the inner recess of the spring mounting, and the lower end of the return spring abuts against the second step surface. The airflow passes through the return spring and enters the lower channel from the upper channel.

[0007] Furthermore, the lower valve core is T-shaped, with the upper end of the T-shape located inside the second channel and the lower end of the T-shape passing through the second channel to cooperate with the push rod assembly.

[0008] Furthermore, the outer side of the upper T-shaped part of the lower valve core is wrapped with a rubber layer, and a third step surface is provided in the second channel. The rubber layer on the outer side of the upper T-shaped part is capped at the third step surface.

[0009] Furthermore, the rubber layer fully encloses the T-shaped upper end of the valve core through a rubber vulcanization process.

[0010] Furthermore, the vent is located at the lower end of the sleeve within the valve chamber.

[0011] Furthermore, the push rod assembly includes a sleeve, a push rod, and steel balls. A fourth step surface is provided on the inner wall of the valve cavity located at the lower end of the exhaust port. The sleeve is fitted onto the inner wall of the valve cavity at the lower end of the fourth step surface. The push rod is set inside the valve cavity located at the lower end of the exhaust port. The end of the push rod passes through the sleeve and is located outside the valve cavity. An outer edge is provided on the outer side of the upper end of the push rod. The outer edge is limited on the fourth step surface. A cylindrical concave is provided at the end of the push rod. Several steel balls are provided in the cylindrical concave. The opening of the cylindrical concave limits the steel balls.

[0012] Furthermore, the upper end of the push rod is provided with a push rod guide hole, the size of which matches the lower end of the lower valve core, and the lower end of the lower valve core is inserted into the push rod guide hole.

[0013] Furthermore, a sealing ring is provided between the valve body and the valve cover; a sealing ring is provided between the bushing and the valve cavity; a sealing ring is provided between the sleeve and the valve cavity wall located below the air outlet; a sealing ring is provided between the push rod and the valve cavity; and a sealing ring is provided between the outer wall of the upper valve core and the inner wall of the first channel.

[0014] Furthermore, a filter screen is installed at the air intake.

[0015] The beneficial effects of this invention are as follows: While maintaining the original performance of the double-H valve, it continuously reduces switching force, improves guidance, reduces jamming, reduces leakage due to dual-force compression sealing, and prevents leakage caused by seal ring detachment; the upper valve core has low friction under the guidance of the bushing, making it more sensitive and reducing jamming; the upper valve core is better compressed and sealed under the dual force of air source pressure and spring, reducing leakage; the lower valve core is easier to seal with the upper valve core, resulting in lower switching force within the same cavity; the lower valve core is easier to seal with the sleeve, eliminating the problem of seal ring detachment and reducing leakage; the push rod guide hole matches the lower valve core rod, pushing and guiding the lower valve core to achieve sealing and venting. Attached Figure Description

[0016] Figure 1 This is a structural diagram.

[0017] Figure 2 Schematic diagram of bushing and sleeve assembly.

[0018] 1 is the valve body; 2 is the valve cover; 3 is the upper valve core; 4 is the valve chamber; 5 is the air outlet; 6 is the air inlet; 7 is the bushing; 8 is the sleeve; 9 is the lower valve core; 10 is the return spring; 11 is the sleeve; 12 is the push rod; 13 is the steel ball; 14 is the fourth step surface; 15 is the outer edge; 16 is the cylindrical concave shape; 17 is the push rod guide hole; 18 is the filter screen; 21 is the spring mounting concave shape; 41 is the first step surface; 66 is the exhaust port; 71 is the first channel; 72 is the first limiting protrusion; 73 is the second step surface; 81 is the second channel; 82 is the third step surface; 91 is the rubber layer. Detailed Implementation

[0019] The following will refer to the appendices in the embodiments of the present invention. Figure 1-2 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1 (refer to) Figure 1-2A dual-H valve assembly for automotive transmissions with good sealing performance includes a valve body 1 and a valve cover 2. The valve body has an exhaust port 66, two valve chambers 4, and an outlet 5. Each valve chamber 4 contains a valve assembly. The valve cover 2 is mounted on the upper end of the valve body 1 and has an inlet 6. The inlet 6 is connected to the outlet 5 via the valve assembly. The valve assembly includes: bushings 7, sleeves 8, an upper valve core 3, a lower valve core 9, and a return spring 10. The bushings 7 and sleeves 8 combine to form a valve core cavity and are disposed within the valve chamber. The outer sides of the two bushings 7 abut against the corresponding lower ends of the valve cover 2. A first channel 71 is provided within the bushings 7, maintaining a ventilation gap with the inlet 5. The lower ends of the two sleeves 8 are positioned relative to the valve chambers. On the first step surface 41, the upper ends of two sleeves 8 abut against the lower ends of corresponding bushings 7. A second channel 81 is provided inside the sleeve 8, with a vent hole connecting to the air outlet 6. Above the first channel 71, a spring mounting recess 21 corresponds to the lower end of the valve cover 2. A return spring 10 is provided between the first channel 71 and the spring mounting recess 21. A first limiting protrusion 72 is provided at the lower end of the first channel 71. The upper valve core 3 is located within the first channel, with its lower end smaller than its upper end. The upper end of the upper valve core is limited by the first limiting protrusion, while its lower end passes through the first limiting protrusion and is placed inside the sleeve. The lower end of the upper valve core and the lower valve core 9 within the second channel of the sleeve work together through a push rod assembly within the valve cavity. The connection between the exhaust port 66, the air outlet 5, and the air inlet 6 pushes the cylinder connected to the air outlet 5.

[0021] A double H-valve assembly for automotive transmissions with good sealing performance, wherein the outer side of the air outlet 5 is connected to the cylinder.

[0022] A dual H-valve assembly for automotive transmissions with good sealing performance has an upper valve core with an upper channel and a lower channel, and a second step surface 73 between the upper and lower channels. The upper end of the return spring abuts against the spring mounting recess, and the lower end of the return spring abuts against the second step surface. Airflow passes through the return spring and enters the lower channel from the upper channel.

[0023] A dual H-valve assembly for automotive transmissions with good sealing performance, wherein the lower valve core 9 is T-shaped, the upper end of the T-shape is located in the second channel, and the lower end of the T-shape passes through the second channel and works in conjunction with the push rod assembly.

[0024] A dual-H valve assembly for automotive transmissions with good sealing performance includes a rubber layer 91 wrapped around the outer side of the upper T-shaped part of the lower valve core. A third stepped surface 82 is provided inside the second channel 81, and the rubber layer on the outer side of the upper T-shaped part is capped at the third stepped surface. The third stepped surface 82 is an inclined surface that can achieve an airtight seal with the rubber layer 91.

[0025] A dual-H valve assembly for automotive transmissions with good sealing performance, wherein the rubber layer 91 fully encloses the T-shaped upper end of the valve core through a rubber vulcanization process.

[0026] A dual H-valve assembly for automotive transmissions with good sealing performance, wherein the exhaust port 66 is located in the valve chamber 4 at the lower end of the sleeve 8.

[0027] A dual H-valve assembly for an automotive transmission with good sealing performance includes a pushrod assembly comprising a sleeve 11, a pushrod 12, and steel balls 13. A fourth step surface 14 is provided on the inner wall of the valve cavity located at the lower end of the exhaust port 66 for transition. The sleeve is fitted onto the inner wall of the valve cavity at the lower end of the fourth step surface. The pushrod is disposed in the valve cavity located at the lower end of the exhaust port, with the end of the pushrod passing through the sleeve and located outside the valve cavity. An outer edge 15 is provided on the outer side of the upper end of the pushrod, which is limited on the fourth step surface. A cylindrical recess 16 is provided at the end of the pushrod, and several steel balls are disposed in the cylindrical recess. The opening of the cylindrical recess limits the steel balls.

[0028] A double H-valve assembly for automotive transmissions with good sealing performance has a push rod guide hole 17 at the upper end of the push rod. The size of the push rod guide hole matches the lower end of the lower valve core, and the lower end of the lower valve core is inserted into the push rod guide hole.

[0029] A dual-H valve assembly for an automotive transmission with good sealing performance includes a sealing ring between the valve body 1 and the valve cover 2; a sealing ring between the bushing 7 and the valve cavity 4; a sealing ring between the sleeve 8 and the wall of the valve cavity 4 located below the air outlet; a sealing ring between the push rod and the valve cavity; and a sealing ring between the outer wall of the upper valve core and the inner wall of the first channel.

[0030] A dual H-valve assembly for automotive transmissions with good sealing performance, wherein a filter screen 18 is provided at the air inlet 6.

[0031] A dual H-valve assembly for automotive transmissions with good sealing performance, wherein the upper end of the filter screen abuts against the lower end of the side wall at the air inlet 6, the lower end of the filter screen has a lower edge, and the outer side of the filter screen fits into the channel at the lower end of the air inlet 6.

[0032] The applicant's existing patent application has the following problems: the valve core is very long and the guide is at the upper end, while the lower part of the valve core is not guided and is prone to swaying, resulting in air leakage, jamming and high friction, requiring a larger switching force; the seal is only achieved by the air source pressure, the spring force is very small and negligible, and it is easily affected by unstable air pressure, resulting in air leakage; the lower end of the valve core is covered by a sealing ring, but there is no anti-disengagement limit, so it is easy to be blown off during exhaust, resulting in air leakage. This patent features: the upper valve core has low friction under the guidance of the bushing, making it more sensitive and reducing jamming; the upper valve core is better pressed and sealed under the dual force of air source pressure and spring, reducing air leakage; the lower valve core is easier to seal with the upper valve core, and requires less switching force within the same cavity; the lower valve core is easier to seal with the sleeve, eliminating the problem of the sealing ring coming off, reducing air leakage; the push rod guide hole matches the lower valve core rod, pushing and guiding the lower valve core to achieve sealing and venting.

[0033] A dual H-valve assembly for automotive transmissions with good sealing performance. The thrust pushes the push rod upward to drive the lower valve core to move upward. The rubber layer at the upper end of the lower valve core is attached to the lower end of the upper valve core, sealing the upper and lower channels and driving the airflow to be discharged from the exhaust port.

[0034] A dual H-valve assembly for automotive transmissions with good sealing performance allows air to enter through the intake port when there is no thrust, while the upper and lower valve cores separate. The lower channel connects to the outlet port for air exit, and the rubber layer at the upper end of the lower valve core adheres to the third step surface, sealing the second channel.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A double H-valve assembly for an automotive transmission with good sealing performance, comprising a valve body (1) and a valve cover (2), wherein the valve body is provided with an exhaust port (66), two valve chambers (4) and an exhaust port (5), each valve chamber (4) is equipped with a valve assembly, the valve cover (2) is installed on the upper end of the valve body (1) and is provided with an air inlet (6), the air inlet (6) being connected to the exhaust port (5) through the valve assembly, characterized in that: The valve assembly includes: The valve core consists of a bushing (7), a sleeve (8), an upper valve core (3), a lower valve core (9), and a return spring (10). The bushing (7) and the sleeve (8) are combined to form a valve core cavity and are disposed inside the valve cavity. The outer sides of the two bushings (7) abut against the corresponding lower end of the valve cover (2). The bushing (7) has a first channel (71) inside, which maintains a ventilation gap with the air inlet (6). The lower ends of the two sleeves (8) are placed on the first step surface (41) of the valve cavity, and the upper ends of the two sleeves (8) abut against the lower end of the corresponding bushing (7). The sleeve (8) has a second channel (81) inside, which has a vent hole connected to the air outlet (5). The upper part of the first channel (71) is located above the corresponding... A spring mounting recess (21) is provided at the lower end of the valve cover (2). A reset spring (10) is provided between the first channel (71) and the spring mounting recess (21). A first limiting protrusion (72) is provided at the lower end of the first channel (71). The upper valve core (3) is located in the first channel. The lower end of the upper valve core is smaller than the upper end of the upper valve core. The upper end of the upper valve core is limited by the first limiting protrusion. The lower end of the upper valve core passes through the first limiting protrusion and is placed in the sleeve. The lower end of the upper valve core and the lower valve core (9) in the second channel of the sleeve work together with the push rod assembly in the valve cavity. The upper end of the push rod is provided with a push rod guide hole (17). The size of the push rod guide hole matches the lower end of the lower valve core. The lower end of the lower valve core is inserted into the push rod guide hole.

2. The dual H-valve assembly for automotive transmissions with good sealing performance according to claim 1, characterized in that: The upper valve core is provided with an upper channel and a lower channel. There is a second step surface (73) between the upper channel and the lower channel. The upper end of the reset spring abuts against the inner recess of the spring mounting, and the lower end of the reset spring abuts against the second step surface. The airflow passes through the reset spring and enters the lower channel from the upper channel.

3. The dual H-valve assembly for automotive transmissions with good sealing performance according to claim 1, characterized in that: The lower valve core (9) is T-shaped, with the upper end of the T-shape located in the second channel and the lower end of the T-shape passing through the second channel to work in conjunction with the push rod assembly.

4. The dual H-valve assembly for automotive transmissions with good sealing performance according to claim 3, characterized in that: The upper T-shaped outer side of the lower valve core is wrapped with a rubber layer (91), and the second channel (81) is provided with a third step surface (82). The rubber layer on the outer side of the upper T-shaped outer side is capped at the third step surface.

5. The dual H-valve assembly for automotive transmissions with good sealing performance according to claim 4, characterized in that: The rubber layer (91) fully encloses the upper T-shaped end of the valve core through a rubber vulcanization process.

6. The dual H-valve assembly for automotive transmissions with good sealing performance according to claim 1, characterized in that: The exhaust port (66) is located at the lower end of the sleeve (8) of the valve chamber (4).

7. The dual H-valve assembly for automotive transmissions with good sealing performance according to claim 3, characterized in that: The push rod assembly includes a sleeve (11), a push rod (12), and steel balls (13). A fourth step surface (14) is provided on the inner wall of the valve cavity located at the lower end of the exhaust port (66). The sleeve is fitted on the inner wall of the valve cavity at the lower end of the fourth step surface. The push rod is set in the valve cavity located at the lower end of the exhaust port. The end of the push rod passes through the sleeve and is located outside the valve cavity. An outer edge (15) is provided on the outer side of the upper end of the push rod. The outer edge is limited on the fourth step surface. A cylindrical concave (16) is provided at the end of the push rod. Several steel balls are provided in the cylindrical concave. The steel balls are limited at the opening of the cylindrical concave.

8. The dual H-valve assembly for automotive transmissions with good sealing performance according to claim 1, characterized in that: A sealing ring is provided between the valve body (1) and the valve cover (2); a sealing ring is provided between the bushing (7) and the valve cavity (4); a sealing ring is provided between the sleeve (8) and the wall of the valve cavity (4) located below the air outlet; a sealing ring is provided between the push rod and the valve cavity; and a sealing ring is provided between the outer wall of the upper valve core and the inner wall of the first channel.

9. A dual H-valve assembly for an automotive transmission with good sealing performance according to claim 1, characterized in that: A filter screen (18) is provided at the air inlet (6).

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