A brake cylinder pressure regulating device with weighing signal averaging function

Abstract

The present invention belongs to the technical field of brake cylinders, and particularly relates to a brake cylinder pressure regulating device with a weighing signal averaging function. The present invention comprises a housing, a small piston component is installed in the brake valve cavity, and a large piston component is installed in the brake cylinder; a jump suspension rod component is also installed in the housing, and the lower end of the jump suspension rod component is rotatably connected to a balance lever, and the output end of the small piston component and the output end of the large piston component overlap the upper side of the two ends of the balance lever respectively; an averaging part is also installed in the housing, and the output end of the averaging part is rotatably connected to a shift fork, and a signal fulcrum is sleeved in the shift fork; an auxiliary air cylinder is also arranged in the housing, and a check valve is installed in the auxiliary air cylinder, and an atmospheric channel is arranged in the check valve, a small valve port is formed between the large piston component and the check valve, and a valve seat is installed in the auxiliary air cylinder, and a large valve port is formed between the valve seat and the check valve. The present invention provides a brake cylinder pressure regulating device with a weighing signal averaging function.

Description

Technical Field

[0001] The invention belongs to the technical field of brake cylinders, and in particular relates to a brake cylinder pressure regulating device with a weighing signal averaging function. Background Art

[0002] When the vehicle requires empty vehicle pressure, the brake cylinder pressure is low, and when the vehicle requires heavy vehicle pressure, the brake cylinder pressure is high, so the vehicle unbalanced load affects the brake cylinder pressure. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the object of the present invention is to provide a brake cylinder pressure regulating device with a weighing signal averaging function.

[0004] The technical solution adopted by the present invention is:

[0005] A brake cylinder pressure adjustment device with a weighing signal averaging function comprises a shell, wherein the shell is respectively provided with a brake valve chamber and a brake cylinder, a small piston component is installed in the brake valve chamber, and a large piston component is installed in the brake cylinder; a jump suspension rod component is also installed in the shell, the lower end of the jump suspension rod component is rotatably connected to a balance lever, and the output end of the small piston component and the output end of the large piston component respectively overlap the upper sides of the two ends of the balance lever; an averaging part is also installed in the shell, the output end of the averaging part is rotatably connected to a shift fork, the middle section of the shift fork is rotatably connected to the shell, and a signal fulcrum for supporting the balance lever from the lower side is sleeved in the shift fork; an auxiliary air cylinder is also arranged in the shell, the auxiliary air cylinder is connected to the brake cylinder, a check valve is installed in the auxiliary air cylinder, an atmospheric channel is arranged in the check valve, a small valve port is formed between the large piston component and the check valve, a valve seat is installed in the auxiliary air cylinder, and a large valve port is formed between the valve seat and the check valve.

[0006] The present invention uses an averaging unit to perform an average processing on the two input weighing pressure signals to eliminate the influence of eccentric load, and then outputs an average weighing pressure reflecting the vehicle load to control the position of the signal fulcrum in the load sensing and weighing unit. Through the action of the signal action unit and the action balancing unit, the balance lever is kept in a balanced state, thereby realizing the pressure control from the auxiliary air cylinder to the brake cylinder, and can be adjusted throughout the stroke, so as to achieve the purpose of automatically obtaining the pressure air matching the vehicle load in the brake cylinder. The present invention has an ingenious structure and significant effect, and realizes the purpose of the brake cylinder pressure automatically changing in proportion to the change of the vehicle load steplessly and continuously.

[0007] As a preferred embodiment of the present invention, the averaging portion includes a double piston rod, one end of the shift fork is rotatably connected to the double piston rod, one end of the double piston rod is sequentially connected to a first piston and a second piston, a first piston chamber and a second piston chamber are provided in the shell, the first piston is provided in the first piston chamber, the second piston is provided in the second piston chamber, the pressure signal of the intake valve of the first piston chamber comes from the pressure signal at one end of the vehicle, and the pressure signal of the intake valve of the second piston chamber comes from the pressure signal at the other end of the vehicle.

[0008] As a preferred embodiment of the present invention, the area ratio of the first piston to the second piston is 2:1.

[0009] As a preferred solution of the present invention, a signal spring is connected between one end of the double-piston rod away from the first piston and the second piston and the housing.

[0010] As a preferred embodiment of the present invention, the small piston component includes a guide cap, which is fixed in the brake valve cavity. A small piston rod is sleeved in the guide cap. The lower end of the small piston rod contacts the upper side of the balance lever. A small piston body is fixed on the small piston rod, and the small piston body is connected to the brake valve cavity.

[0011] As a preferred embodiment of the present invention, the large piston component includes a guide sleeve, which is fixed in the brake cylinder. A large piston rod is provided in the guide sleeve. The lower end of the large piston rod contacts the upper side of the balance lever. The large piston rod is connected to a large piston body, which is connected to the brake cylinder. An intermediate cavity is provided in the shell, which is respectively connected to the brake cylinder and the auxiliary air cylinder. The upper section of the large piston rod is located in the intermediate cavity, and a small valve port is formed between the upper end of the large piston rod and the lower end of the check valve.

[0012] As a preferred embodiment of the present invention, a guide seat is fixed in the auxiliary air cylinder, the check valve is sleeved in the guide seat, a return spring is connected between the check valve and the guide seat, and the return spring is sleeved on the check valve.

[0013] As a preferred embodiment of the present invention, a jump cavity is provided in the shell, and the jump suspension rod comprises a suspension rod, a jump spring is connected between the upper end of the suspension rod and the lower end of the jump cavity, the jump spring is sleeved on the suspension rod, and the lower end of the suspension rod is rotationally connected to the middle section of the balance lever.

[0014] As a preferred solution of the present invention, a connecting rod is rotatably connected in the shell, and the other end of the connecting rod is rotatably connected to one end of the balance lever.

[0015] As a preferred solution of the present invention, a slideway for guiding the shift fork is installed in the housing.

[0016] The beneficial effects of the present invention are:

[0017] The present invention performs average processing after inputting two weighing signals, eliminates the influence of vehicle eccentric load on brake cylinder pressure, and achieves the purpose of enabling the brake cylinder to automatically obtain pressure air matching the vehicle load. The average part and the brake cylinder automatic adjustment part are integrated, and there are fewer leakage fault points. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0020] In the figure: 1-housing; 2-small piston component; 3-large piston component; 4-jump suspension rod component; 5-balance lever; 6-average part; 7-shift fork; 8-signal fulcrum; 9-check valve; 11-brake valve chamber; 12-brake cylinder; 13-auxiliary air cylinder; 14-first piston chamber; 15-second piston chamber; 16-middle chamber; 17-jump chamber; 18-connecting rod; 19-slideway; 21-guide cap; 22-small piston rod; 23-small piston body; 31-guide sleeve; 32-large piston rod; 33-large piston body; 41-suspender rod; 42-jump spring; 61-double piston rod; 62-first piston; 63-second piston; 64-signal spring; 91-atmospheric channel; 92-small valve port; 93-valve seat; 94-large valve port; 95-guide seat; 96-reset spring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] 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 claimed invention, 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 the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0023] like Figure 1 and Figure 2As shown, the brake cylinder pressure regulating device with weighing signal averaging function of this embodiment comprises a housing 1, wherein the housing 1 is provided with a brake valve chamber 11 and a brake cylinder 12, wherein a small piston assembly 2 is installed in the brake valve chamber 11, and a large piston assembly 3 is installed in the brake cylinder 12; a jump suspension rod assembly 4 is also installed in the housing 1, wherein the lower end of the jump suspension rod assembly 4 is rotatably connected with a balance lever 5, wherein the output end of the small piston assembly 2 and the output end of the large piston assembly 3 are respectively overlapped with the upper sides of the two ends of the balance lever 5; The averaging part 6, the output end of the averaging part 6 is rotatably connected with a shift fork 7, the middle section of the shift fork 7 is rotatably connected with the housing 1, and a signal fulcrum 8 for supporting the balance lever 5 from the lower side is sleeved in the shift fork 7; the housing 1 is also provided with an auxiliary air cylinder 13, the auxiliary air cylinder 13 is connected with the brake cylinder 12, a check valve 9 is installed in the auxiliary air cylinder 13, an atmospheric passage 91 is arranged in the check valve 9, a small valve opening 92 is formed between the large piston assembly 3 and the check valve 9, a valve seat 93 is installed in the auxiliary air cylinder 13, and a large valve opening 94 is formed between the valve seat 93 and the check valve 9.

[0024] The present invention uses the averaging unit 6 to average the two input weighing pressure signals to eliminate the influence of eccentric load, and then outputs an average weighing pressure reflecting the vehicle load to control the position of the signal fulcrum 8 in the load sensing and weighing unit. Through the action of the signal action unit and the action balancing unit, the balance lever 5 is kept in a balanced state, thereby realizing the pressure control from the auxiliary air cylinder 13 to the brake cylinder 12, and can be adjusted in full stroke, so as to achieve the purpose of automatically obtaining the pressure air matching the vehicle load for the brake cylinder 12. The present invention has an ingenious structure and significant effect, and realizes the purpose of the brake cylinder 12 pressure automatically changing steplessly and continuously in direct proportion to the change of the vehicle load.

[0025] Specifically, the averaging part 6 includes a double piston rod 61, one end of the shift fork 7 is rotatably connected to the double piston rod 61, one end of the double piston rod 61 is connected to the first piston 62 and the second piston 63 in sequence, the housing 1 is provided with a first piston chamber 14 and a second piston chamber 15, the first piston 62 is provided in the first piston chamber 14, the second piston 63 is provided in the second piston chamber 15, the intake valve pressure signal of the first piston chamber 14 comes from the pressure signal at one end of the vehicle, and the intake valve pressure signal of the second piston chamber 15 comes from the pressure signal at the other end of the vehicle. A signal spring 64 is connected between the housing 1 and one end of the double piston rod 61 away from the first piston 62 and the second piston 63. The area ratio of the first piston 62 to the second piston 63 is 2:1. The present invention inputs weighing signals from both ends of the vehicle respectively, so that the forces acting on the double piston rod 61 by the first piston 62 and the second piston 63 are averaged, and then the double piston rod 61 pushes the shift fork 7 to rotate a certain angle, and the shift fork 7 pushes the signal fulcrum 8 to move a certain distance, so that the fulcrum of the balance lever 5 can respond to the averaged pressure signal to adjust the pressure of the brake cylinder 12.

[0026] Specifically, the small piston assembly 2 includes a guide cap 21, which is fixed in the brake valve cavity 11. A small piston rod 22 is sleeved in the guide cap 21. The lower end of the small piston rod 22 contacts the upper side of the balance lever 5. A small piston body 23 is fixed on the small piston rod 22. The small piston body 23 is connected to the brake valve cavity 11. After the brake signal is issued, the pressure of the brake valve rises, pushing the small piston body 23 downward, and the small piston body 23 drives the small piston rod 22 downward. The guide cap 21 guides the small piston rod 22.

[0027] Specifically, the large piston assembly 3 includes a guide sleeve 31, which is fixed in the brake cylinder 12, and a large piston rod 32 is sleeved in the guide sleeve 31, the lower end of the large piston rod 32 contacts the upper side of the balance lever 5, and a large piston body 33 is connected to the large piston rod 32, and the large piston body 33 is connected to the brake cylinder 12; the housing 1 is provided with an intermediate cavity 16, which is connected to the brake cylinder 12 and the auxiliary air cylinder 13 respectively, and the upper section of the large piston rod 32 is located in the intermediate cavity 16, and a small valve port 92 is formed between the upper end of the large piston rod 32 and the lower end of the check valve 9. The large piston rod 32 is sleeved in the valve seat 93, and there is an annular gap between the large piston rod 32 and the valve seat 93.

[0028] When the balance lever 5 pushes the large piston rod 32 upward, the large piston rod 32 first contacts the check valve 9, thereby closing the atmospheric passage 91. When the large piston rod 32 continues to rise, it pushes the check valve 9 upward, and the large valve port 94 between the check valve 9 and the valve seat 93 is opened, and the compressed air of the auxiliary air cylinder 13 enters the intermediate cavity 16, and then enters the brake cylinder 12.

[0029] A guide seat 95 is fixed in the auxiliary air cylinder 13, and the check valve 9 is sleeved in the guide seat 95. A return spring 96 is connected between the check valve 9 and the guide seat 95, and the return spring 96 is sleeved on the check valve 9. During braking, after the brake cylinder 12 and the brake valve pressure establish a balanced relationship with the signal fulcrum 8 as the rotation axis, the large valve port 94 is closed.

[0030] When releasing, the brake valve pressure is first reduced, destroying the balance relationship of the balance lever 5, and the large piston rod 32 moves downward under the pressure of the brake cylinder 12, opening the small valve port 92, and the pressurized air in the brake cylinder 12 pipeline is discharged into the atmosphere.

[0031] Specifically, a jump cavity 17 is provided in the shell 1, and the jump suspension rod assembly 4 includes a suspension rod 41, and a jump spring 42 is connected between the upper end of the suspension rod 41 and the lower end of the jump cavity 17, and the jump spring 42 is sleeved on the suspension rod 41, and the lower end of the suspension rod 41 is rotatably connected to the middle section of the balance lever 5.

[0032] A connecting rod 18 is rotatably connected in the housing 1, and the other end of the connecting rod 18 is rotatably connected to one end of the balance lever 5. The connecting rod 18 supports the balance lever 5 to prevent the balance lever 5 from falling. A slideway 19 for guiding the shift fork 7 is installed in the housing 1.

[0033] Working principle:

[0034] 1) Braking initial jump position:

[0035] When the brake is not applied, the inside of the adjustment device is in a relaxed state. At this time, the jump spring 42 lifts the suspension rod 41, and the suspension rod 41 pulls up the balance lever 5 through the suspension rod 41 pin, and the balance lever 5 does not contact the signal fulcrum 8. In the early stage of braking, the pressure of the brake valve rises, pushing the small piston body 23 to move downward, and the top of the small piston rod 22 presses the balance lever 5 downward. The position of the suspension rod 41 pin serves as the fulcrum of the balance lever 5, and the end of the balance lever 5 close to the large piston rod 32 is lifted. The large piston rod 32 first contacts the check valve 9, so that the small valve port 92 is closed, cutting off the passage between the brake cylinder 12 and the atmosphere. The large piston rod 32 continues to rise, pushing the check valve 9 upward, and the large valve port 94 between the check valve 9 and the valve seat 93 is opened, so that the compressed air of the auxiliary air cylinder 13 enters the intermediate cavity 16, and then enters the brake cylinder 12. The compressed air of the brake cylinder 12 enters the upper side of the large piston body 33, pushing the large piston body 33 to drive the large piston rod 32 to move downward. As the pressure in the brake valve and the brake cylinder 12 rises, both ends of the balance lever 5 receive downward pressure, causing the balance lever 5 to move downward as a whole and contact the signal fulcrum 8. At this time, the pressure in the brake cylinder 12 rises to a certain pressure, and the initial jump is completed.

[0036] At the same time as the initial jump, the weighing pressure signals at both ends of the vehicle push the first piston 62 and the second piston 63 to move leftward until they are balanced with the signal spring 64. However, since the signal fulcrum 8 is not in contact with the lever at this time, the position of the signal fulcrum 8 does not affect the pressure ratio between the brake cylinder 12 and the volume chamber during the initial jump.

[0037] 2) Braking position:

[0038] After the initial jump is over, the pressure in the brake cylinder 12 continues to rise. Since the balance lever 5 has contacted the signal fulcrum 8, the brake cylinder 12 and the brake valve pressure establish a balanced relationship with the signal fulcrum 8 as the rotation axis, and then the large valve port 94 is closed. Therefore, the position of the signal fulcrum 8 determines the pressure ratio between the brake valve and the brake cylinder 12, thereby achieving the purpose of adjusting the pressure in the brake cylinder 12 by changing the position of the signal fulcrum 8.

[0039] 3) Relief position:

[0040] During the release, the brake valve pressure is first reduced, destroying the balance relationship of the balance lever 5, and the large piston rod 32 moves downward under the pressure of the brake cylinder 12, opening the small valve port 92, and the pressurized air in the brake cylinder 12 pipeline is discharged into the atmosphere. During the release process, as the brake valve pressure continues to decrease, the brake cylinder 12 pressure is always greater than the brake valve pressure, and the small valve port 92 is always in an open state, so the brake cylinder 12 pressure can be smoothly released to zero.

[0041] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A brake cylinder pressure adjustment device with weighing signal averaging function, characterized in that: The invention comprises a housing (1), wherein the housing (1) is provided with a brake valve chamber (11) and a brake cylinder (12), wherein a small piston assembly (2) is installed in the brake valve chamber (11), and a large piston assembly (3) is installed in the brake cylinder (12); a jump suspension rod assembly (4) is also installed in the housing (1), and the lower end of the jump suspension rod assembly (4) is rotatably connected to a balance lever (5), and the output end of the small piston assembly (2) and the output end of the large piston assembly (3) are respectively overlapped with the upper sides of the two ends of the balance lever (5); an averaging part (6) is also installed in the housing (1), and the output end of the averaging part (6) is rotatably connected to a dial lever (5). The shift fork (7) is rotatably connected to the housing (1). The shift fork (7) is provided with a signal fulcrum (8) for supporting the balance lever (5) from the bottom. The housing (1) is also provided with an auxiliary air cylinder (13). The auxiliary air cylinder (13) is connected to the brake cylinder (12). A check valve (9) is installed in the auxiliary air cylinder (13). An atmospheric passage (91) is provided in the check valve (9). A small valve port (92) is formed between the large piston assembly (3) and the check valve (9). A valve seat (93) is installed in the auxiliary air cylinder (13). A large valve port (94) is formed between the valve seat (93) and the check valve (9).

2. A brake cylinder pressure regulating device with weighing signal averaging function according to claim 1, characterized in that: The averaging portion (6) comprises a double piston rod (61), one end of the shift fork (7) is rotatably connected to the double piston rod (61), one end of the double piston rod (61) is sequentially connected to a first piston (62) and a second piston (63), a first piston chamber (14) and a second piston chamber (15) are arranged in the housing (1), the first piston (62) is arranged in the first piston chamber (14), the second piston (63) is arranged in the second piston chamber (15), an intake valve pressure signal of the first piston chamber (14) comes from a pressure signal at one end of the vehicle, and an intake valve pressure signal of the second piston chamber (15) comes from a pressure signal at the other end of the vehicle.

3. A brake cylinder pressure regulating device with weighing signal averaging function according to claim 2, characterized in that: The area ratio of the first piston (62) to the second piston (63) is 2:

1.

4. A brake cylinder pressure regulating device with weighing signal averaging function according to claim 2, characterized in that: A signal spring (64) is connected between one end of the double piston rod (61) away from the first piston (62) and the second piston (63) and the housing (1).

5. The brake cylinder pressure regulating device with weighing signal averaging function according to claim 1, characterized in that: The small piston assembly (2) comprises a guide cap (21), the guide cap (21) is fixed in the brake valve cavity (11), a small piston rod (22) is sleeved in the guide cap (21), the lower end of the small piston rod (22) contacts the upper side of the balance lever (5), a small piston body (23) is fixed on the small piston rod (22), and the small piston body (23) is connected to the brake valve cavity (11).

6. The brake cylinder pressure regulating device with weighing signal averaging function according to claim 1, characterized in that: The large piston component (3) comprises a guide sleeve (31), the guide sleeve (31) is fixed in the brake cylinder (12), a large piston rod (32) is sleeved in the guide sleeve (31), the lower end of the large piston rod (32) contacts the upper side of the balance lever (5), a large piston body (33) is connected to the large piston rod (32), and the large piston body (33) is connected to the brake cylinder (12); an intermediate cavity (16) is arranged in the housing (1), the intermediate cavity (16) is connected to the brake cylinder (12) and the auxiliary air cylinder (13), the upper section of the large piston rod (32) is located in the intermediate cavity (16), and a small valve port (92) is formed between the upper end of the large piston rod (32) and the lower end of the check valve (9).

7. The brake cylinder pressure regulating device with weighing signal averaging function according to claim 1, characterized in that: A guide seat (95) is fixed in the auxiliary air cylinder (13), the check valve (9) is sleeved in the guide seat (95), a return spring (96) is connected between the check valve (9) and the guide seat (95), and the return spring (96) is sleeved on the check valve (9).

8. The brake cylinder pressure regulating device with weighing signal averaging function according to claim 1, characterized in that: A jump chamber (17) is provided in the shell (1), and the jump suspension rod assembly (4) includes a suspension rod (41), a jump spring (42) is connected between the upper end of the suspension rod (41) and the lower end of the jump chamber (17), the jump spring (42) is sleeved on the suspension rod (41), and the lower end of the suspension rod (41) is rotatably connected to the middle section of the balance lever (5).

9. The brake cylinder pressure regulating device with weighing signal averaging function according to claim 1, characterized in that: A connecting rod (18) is rotatably connected inside the housing (1), and the other end of the connecting rod (18) is rotatably connected to one end of the balancing lever (5).

10. A brake cylinder pressure regulating device with weighing signal averaging function according to any one of claims 1 to 9, characterized in that: A slideway (19) for guiding the shift fork (7) is installed in the housing (1).

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