Double-pressure-regulating structure, relay valve applying double-pressure-regulating structure and vehicle

Abstract

The utility model discloses a double pressure regulating structure and a relay valve and a vehicle applying the same, the double pressure regulating structure comprises a main valve body and two pressure regulating parts, the main valve body comprises a valve body shell, a first piston assembly and a first spring assembly, the valve body shell is internally provided with a plurality of cavities, and air inlet holes and exhaust holes communicated with the cavities; the first piston assembly and the first spring assembly are sequentially arranged in a cavity of the valve body shell along the same axis, the two pressure adjusting parts are arranged on one side of the main valve body in parallel and at intervals and communicate with the cavity in the main valve body, and each pressure adjusting part is provided with a second piston assembly and an adjusting piece capable of adjusting the movement amplitude of the second piston assembly. The two pressure adjusting parts and the main valve body jointly form a structure which influences the movement of the first piston assembly and outputs different air pressures by adjusting the adjusting pieces corresponding to the second piston assembly respectively. The relay valve solves the problems that in the prior art, a traditional relay valve is limited in adjustable air pressure interval, poor in control precision and poor in working condition matching performance.

Description

Technical Field

[0001] This utility model belongs to the field of relay valve technology, specifically relating to a dual pressure regulating structure and a relay valve and vehicle using it. Background Technology

[0002] With rapid societal development, commercial vehicles are finding increasingly wider applications, and their energy efficiency, environmental friendliness, safety, and intelligence have gradually become a focus of societal attention. Against this backdrop, major commercial vehicle companies are placing greater emphasis on the multi-functional development of vehicle valve products. These products not only significantly improve vehicle performance but also achieve lightweight design while meeting societal demands for energy conservation, environmental protection, and safety.

[0003] Currently, most relay valves on the market use a single pressure regulating device. Traditional relay valves have a limited range of adjustable air pressure and cannot accurately adjust and output air pressure according to the input air pressure, which ultimately affects the operational reliability of the relay valve. At the same time, traditional relay valves cannot meet the braking performance requirements of commercial vehicles under different loads and road conditions. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a dual pressure regulating structure and a relay valve and vehicle using it.

[0005] The purpose of this application is achieved through the following technical solution:

[0006] Firstly, a dual voltage regulation structure is provided, comprising:

[0007] The main valve body includes a valve body shell, a first piston assembly, and a first spring assembly. The valve body shell has multiple cavities and an air inlet and an air outlet communicating with the cavities. The first piston assembly and the first spring assembly are sequentially arranged along the same axis in the cavities of the valve body shell. The first piston assembly reciprocates along the axis under the elastic force of the first spring assembly.

[0008] Two pressure regulating sections are arranged parallel to each other and spaced apart on one side of the main valve body and are both connected to the cavity inside the main valve body. Each pressure regulating section includes a second piston assembly. The second piston assembly has an adjusting element that can adjust the movement amplitude of the second piston assembly. The two pressure regulating sections and the main valve body together constitute a structure that affects the movement of the first piston assembly and outputs different gas pressures by adjusting the adjusting elements corresponding to the second piston assembly respectively.

[0009] Wherein, the axial direction is the axial direction of the first piston assembly.

[0010] In some embodiments, each of the pressure regulating sections, in addition to including the second piston assembly, further includes:

[0011] A housing having a cavity and a through hole communicating with the cavity, the housing being disposed on one side of the valve body housing and communicating with the valve body housing; and

[0012] The second spring assembly is disposed at the bottom of the housing and below the second piston assembly along the axis of the second piston assembly. The second piston assembly reciprocates along the axis under the elastic force of the second spring assembly.

[0013] In some embodiments, the second piston assembly, in addition to the adjusting member, further includes:

[0014] A third spring is disposed within the housing and at the bottom of the adjusting member; and

[0015] The second piston is disposed between the third spring and the second spring assembly, and the second piston reciprocates along the axial direction under the elastic force of the third spring and the second spring assembly.

[0016] In some embodiments, the adjusting member can adjust the spring force of the third spring to adjust the pressure ratio between the air inlet and the exhaust port of the dual pressure regulating structure.

[0017] Secondly, a relay valve is provided, which, in addition to the aforementioned dual pressure regulating structure, also includes a muffler assembly. The muffler assembly is disposed at the bottom of the valve body housing and is used to discharge residual gas when the brake is released.

[0018] Thirdly, a vehicle is provided, including the aforementioned relay valve.

[0019] The beneficial effects of this utility model are: by integrating two pressure regulating parts onto the same relay valve, the working range of the relay valve is effectively expanded, and the output air pressure can be precisely adjusted according to the input air pressure, ensuring reliable operation. At the same time, it can also meet the requirements of vehicle braking force under different load and road conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the dual voltage regulation structure provided in one embodiment of the present invention;

[0022] Figure 2 This is a top view of a dual pressure regulating relay valve provided in one embodiment of the present invention;

[0023] Figure 3 yes Figure 2 Schematic diagram of section AA;

[0024] Figure 4 This is a left view of a dual pressure regulating relay valve provided in one embodiment of the present invention. Detailed Implementation

[0025] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0026] This invention provides a dual pressure regulating structure, a relay valve using the same structure, and a vehicle, solving the problems of limited pressure regulating range, poor control accuracy, and poor adaptability to operating conditions associated with traditional relay valves. This invention also provides a relay valve using the dual pressure regulating structure, and a vehicle using the relay valve.

[0027] like Figure 1 As shown, in one embodiment, a dual pressure regulating structure 10 is provided, which includes a main valve body 101 and two pressure regulating parts 102.

[0028] The main valve body 101 includes a valve body housing 1011, a first piston assembly 1012, and a first spring assembly 1013. The valve body housing 1011 has multiple cavities and air inlet and exhaust ports communicating with the cavities. The first piston assembly 1012 and the first spring assembly 1013 are sequentially arranged along the same axis within the cavities of the valve body housing 1011. The first piston assembly 1012 reciprocates along the axis under the elastic force of the first spring assembly 1013. In one embodiment, the axial direction of the first piston assembly 1012 is a first direction Y. In one embodiment, as... Figure 1 As shown, the valve body housing 1011 includes an upper housing 1011a and a lower housing 1011b. The upper housing 1011a and the lower housing 1011b are fixedly connected by hexagonal socket head cap screws, and an O-ring seal is provided at the connection to ensure the sealing of the entire structure. A second air inlet P2 is provided on the upper right part of the upper housing 1011a. A first air inlet P1 is provided on the right side wall of the lower housing 1011b. The bottom of the lower housing 1011b has an extension extending along the first direction Y. A hollow baffle 1011c is fixed to the top of the extension by an O-ring seal and an elastic baffle. The lower part of the baffle 1011c and the inner side wall of the extension form a first cavity 1014, which communicates with the first air inlet P1. The upper part of the baffle 1011c and the inner side wall of the upper housing 1011a form a second cavity 1015, which communicates with the second air inlet P2.

[0029] The first piston assembly 1012 is disposed within the cavity of the valve body housing 1011, and includes a first piston 1012a and a first piston stop 1012b. In one embodiment, as... Figure 1 As shown, the first piston 1012a is disposed within the second cavity 1015 and reciprocates along the first direction Y; the first piston stop 1012b is an internally hollow annular structure and is fixed to the inner wall of the middle part of the lower housing 1011b by an O-ring and an elastic retaining ring; multiple cavities are formed between the first piston 1012a, the first piston stop 1012b, and the inner wall of the lower housing 1011b, wherein the cavity between the first piston 1012a and the upper housing 1011a constitutes part of the second cavity 1015. a. The second cavity part 1015a is connected to the second air inlet P2; the cavity between the first piston 1012a and the stop part 1011c constitutes the second cavity part 1015b, which is connected to the two pressure regulating parts 102 respectively; the cavity formed by the first piston 1012a, the first piston stop part 1012b and the lower housing 1011b is the second cavity part 3 1015c and the second cavity part 4 1015d respectively, which are connected to the corresponding pressure regulating parts 102 respectively.

[0030] The first spring assembly 1013 is disposed at the bottom of the lower housing 1011b and includes a first spring 1013a, a first spring base 1013b, and a sliding adjustment portion 1013c. In one embodiment, as... Figure 1 As shown, the first spring assembly 1013 is disposed within the first cavity 1014, including a first spring 1013a, a first spring base 1013b, and a sliding adjustment part 1013c. The first spring base 1013b is disposed at the bottom of the first cavity 1014 and is sealed to the lower housing 1011b by an O-ring; the first spring 1013a is sleeved in the groove of the first spring base 1013b; the sliding adjustment part 1013c is an internally hollow annular structure and is sleeved on the outer side wall of the first spring base 1013b and contacts the stop part 1011c. The snap-fit ​​structure inside the sliding adjustment part 1013c contacts the first spring 1013a and reciprocates along the first direction Y under the elastic force of the first spring 1013a.

[0031] Two pressure regulating sections 102 are arranged parallel and spaced apart on one side of the main valve body 101 and are both connected to the cavity inside the main valve body 101. Each pressure regulating section 102 includes a second piston assembly 1022. The second piston assembly 1022 has an adjusting member 1023 capable of adjusting the movement amplitude of the second piston assembly 1022. The two pressure regulating sections 102 and the main valve body 101 together constitute a structure that affects the movement of the first piston assembly 1012 and outputs different gas pressures by adjusting the adjusting members 1023 corresponding to the second piston assemblies 1022 respectively. In one embodiment, as shown... Figure 1 and Figure 3 As shown, the two pressure regulating parts 102 are a first pressure regulating part 102a and a second pressure regulating part 102b, respectively. The two pressure regulating parts 102 are arranged parallel to each other and spaced apart within the cavity on the left side of the lower housing 1011b. Each pressure regulating part 102 includes a second spring assembly 1021 and a second piston assembly 1022. In one embodiment, the second piston assembly 1022 includes a third spring 1022a, a third spring mounting seat 1022b, a second piston 1022c, and an adjusting member 1023. The third spring mounting seat 1022b is disposed within the cavity at the top of the lower housing 1011b and forms a third cavity 1016 with the inner wall of the lower housing 1011b; the second piston 1022c is disposed on the second spring assembly 1021; the third spring 1022a is disposed between the third spring mounting seat 1022b and the second piston 1022c. In one embodiment, as... Figure 1 As shown, the adjusting member 1023 passes through the third spring mounting seat 1022b and enters the third cavity 1016. A cover plate is provided between the adjusting member 1023 and the third spring mounting seat 1022b to ensure the airtightness of the structure. The bottom of the adjusting member 1023 is connected to the third spring 1022a through an adjusting bolt and an adjusting bolt seat. In one embodiment, the adjusting member 1023 uses an internal hex bolt. In one embodiment, as shown... Figure 1 As shown, during the operation of the entire structure, the spring force of the third spring 1022a can be changed by adjusting the adjusting parts 1023 of the two pressure regulating parts 102, thereby adjusting the pressure ratio between the air inlet and exhaust port of the dual pressure regulating structure; at the same time, the entire structure can adjust the values ​​according to customer requirements, thereby accurately adjusting the output air pressure according to the input air pressure, realizing precise control of the braking system, and making the braking process more stable and reliable.

[0032] In one embodiment, such as Figure 1As shown, the second spring assembly 1021 includes a second spring 1021a, a second spring base 1021b, and a second spring insert 1021c. The second spring base 1021b is sleeved on the bottom of the second piston 1022c, with a gap between the second spring base 1021b and the second piston 1022c. The bottom of the second spring base 1021b is sealed to the inner wall of the third cavity 1016 via an O-ring. The second spring 1021a is disposed at the bottom of the third cavity 1016, and the second spring insert 1021c is disposed at the top of the second spring 1021a and can reciprocate along the axial direction under the elastic force of the second spring 1021a. In one embodiment, as... Figure 1 and Figure 3 As shown, the gap inside the first pressure regulating part 102a is connected to the second cavity part 1015b. The end of the gap inside the first pressure regulating part 102a has a first air passage 1031, which extends further and connects with the second cavity part 1015d. The gap inside the second pressure regulating part 201b is connected to the second cavity part 1015b. The end of the gap inside the second pressure regulating part 201b has a second air passage 1032, which extends further and connects with the second cavity part 1015c.

[0033] like Figure 2 As shown, in one embodiment, a relay valve 20 is provided, which, in addition to including the dual pressure regulating structure 10 mentioned in the above embodiments, also includes a silencer assembly 201. In one embodiment, the silencer 201 is disposed at the bottom of the lower housing 1011b and is used to discharge residual gas when the relay valve 20 stops working.

[0034] In one embodiment, such as Figure 1 and Figure 3 As shown, when gas enters the first cavity 1014 through the first air inlet P1, the sliding adjustment part 1013c is in a contact and sealing state with the stop part 1011c under the action of the first spring 1013a, and the first air inlet P1 and the first exhaust port S1 are in a disconnected state.

[0035] When the brake pedal is depressed, gas enters the second cavity 1015a through the second air intake port P2. Under the pressure of the gas, the first piston 1012a moves in the opposite direction of the first direction Y until it contacts the sliding adjustment part 1013c and continues to drive the sliding adjustment part 1013c to move in the opposite direction of the first direction Y. At this time, the sliding adjustment part 1013c is separated from the stop part 1011c, and the first cavity 1014 and the second cavity 1015b are connected through the gap between the sliding adjustment part 1013c and the stop part 1011c. The gas in the first cavity 1014 is discharged through the first exhaust port S1 after passing through the second cavity 1015b, and produces a braking effect on the vehicle. Afterward, the gas enters the two pressure regulating parts 102. At this time, the second piston 1022c is in contact with the second spring insert 1021c under the force of the third spring 1022a. Upon contact and sealing, the gas in the second cavity 1015b passes through the gaps in the two pressure regulating parts 201 and the corresponding connected air passages to the second cavity 1015c and the second cavity 1015d respectively. The gas pressure exerts a thrust on the first piston 1012a in the first direction Y. When the gas pressure in the first exhaust port S1 reaches a certain value, the gas pressure in the second cavity 1015b is greater than the elastic force of the third spring 1022a. The gas pressure in the second cavity 1015b pushes the second piston 1022c to move in the first direction Y. The second piston 1022c separates from the second spring insert 1021c. At the same time, the second spring insert 1021c contacts and seals with the third spring mounting seat 1022c, thereby cutting off the connecting air passages between the second cavity 1015b, the second cavity 1015c, and the second cavity 1015d.

[0036] When the brake pedal is stopped, the gas pressure above the first piston 1012a decreases, and the gas pressure in the second cavity 3 part 1015c and the second cavity 4 part 1015d pushes the first piston 1012a to move along the first direction Y. At this time, the first piston 1012a is separated from the sliding adjustment part 1013c. At the same time, the sliding adjustment part 1013c moves along the first direction Y under the restoring force of the first spring 1013a until it contacts the stop part 1011c. At this time, the first cavity 1014 and the second cavity 2 part 1015b are disconnected. Simultaneously, the gas in the second cavity 1015b is discharged from the relay valve 20 through the gap between the first piston 1012a and the sliding adjustment part 1013c, through the first spring base 1013b and the muffler assembly 201, and the brake is released. When the pressure value of the third spring 1022a is greater than the gas pressure value in the second cavity 1015b, the third spring 1022a moves in the opposite direction to the first direction Y and pushes the second piston 1022c to contact the second spring insert 1021c. At this time, the second spring insert 1021c and the third spring mounting seat 1022c are in a separated state, and the second cavity 1015c and the second cavity 1015d are in a connected state with the second cavity 1015b through the gap between the second spring insert 1021c and the third spring mounting seat 1022c.

[0037] The dual pressure regulating relay valve 20 provided by this utility model adopts two pressure regulating parts 102, which allows the entire device to select any air pressure value within a wider range to switch the pressure magnitude to match the actual braking force required by the vehicle. It has the characteristics of high control precision, reliable operation and strong adaptability to working conditions. In addition, the overall dimensions of the dual pressure regulating relay valve 20 are only slightly different from those of traditional pneumatic relay valves. The structure is compact and lightweight, reducing the adaptation cost caused by installation problems. Compared with traditional pneumatic proportional relay valves, it has a wider application market and stronger versatility.

[0038] The above description is merely a preferred embodiment of one or more embodiments of this specification and is not intended to limit the scope of one or more embodiments of this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the protection scope of one or more embodiments of this specification.

Claims

1. A dual voltage regulation structure, characterized in that, include: The main valve body includes a valve body shell, a first piston assembly, and a first spring assembly. The valve body shell has multiple cavities and an air inlet and an air outlet communicating with the cavities. The first piston assembly and the first spring assembly are sequentially arranged along the same axis in the cavities of the valve body shell. The first piston assembly reciprocates along the axis under the elastic force of the first spring assembly. Two pressure regulating sections are arranged parallel to each other and spaced apart on one side of the main valve body and are both connected to the cavity inside the main valve body. Each pressure regulating section includes a second piston assembly. The second piston assembly has an adjusting element that can adjust the movement amplitude of the second piston assembly. The two pressure regulating sections and the main valve body together constitute a structure that affects the movement of the first piston assembly and outputs different air pressures by adjusting the adjusting elements corresponding to the second piston assembly respectively. Wherein, the axial direction is the axial direction of the first piston assembly.

2. The dual voltage regulation structure according to claim 1, characterized in that, Each of the pressure regulating sections, in addition to including the second piston assembly, also includes: A housing having a cavity and a through hole communicating with the cavity, the housing being disposed on one side of the valve body housing and communicating with the valve body housing; and The second spring assembly is disposed at the bottom of the housing and below the second piston assembly along the axis of the second piston assembly. The second piston assembly reciprocates along the axis under the elastic force of the second spring assembly.

3. The dual voltage regulation structure according to claim 2, characterized in that, In addition to the adjusting member, the second piston assembly also includes: A third spring is disposed within the housing and at the bottom of the adjusting member; and The second piston is disposed between the third spring and the second spring assembly, and the second piston reciprocates along the axial direction under the elastic force of the third spring and the second spring assembly.

4. The dual voltage regulation structure according to claim 3, characterized in that, The adjusting component can adjust the spring force of the third spring to adjust the pressure ratio between the air inlet and the exhaust port of the dual pressure regulating structure.

5. A relay valve, characterized in that, In addition to the dual pressure regulating structure described in any one of claims 1-4, the valve body also includes a muffler assembly disposed at the bottom of the valve body housing for discharging residual gas when the brake is released.

6. A vehicle, characterized in that, Includes the relay valve as described in claim 5.

Images