Commercial vehicle brake pedal structure and adjusting method thereof

Abstract

The invention relates to a commercial vehicle brake pedal structure and an adjusting method thereof. The commercial vehicle brake pedal structure comprises a foot valve mounting shell, a pedal arm, a torsion spring and a brake lamp switch. A pedal arm, a torsion spring and a brake lamp switch are arranged on the foot valve mounting shell; the pedal arm is connected with the torsion spring and is used for rotating and returning the pedal arm on the foot valve mounting shell; the telescopic structure of the brake lamp switch is in contact with the pedal arm and is used for rotating and limiting the pedal arm on the foot valve mounting shell; the pedal force can be effectively reduced, and the idle stroke of the pedal can be rapidly adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of commercial vehicles, and particularly relates to a brake pedal structure of a commercial vehicle and an adjustment method thereof. Background Art

[0002] The brake pedal feel is an important performance parameter of the whole vehicle, and in particular, the brake pedal feel has become an important symbol for measuring the quality of the whole vehicle performance. Currently, a compression spring is commonly connected and installed on the pedal arm of the pedal mechanism. After the pedal is stepped on, the spring is compressed and stressed as the pedal rotates downward. The compression spring generally has a long length and a large force arm, so the spring force moment is relatively large, resulting in a relatively large pedal force when the pedal reaches the maximum stroke. The pedal free travel is often adjusted by a limit screw installed on the pedal arm, with a complex structure. After the pedal mechanism is installed on the vehicle, due to limited debugging space, it is difficult to adjust the free travel. Summary of the Invention

[0003] The purpose of the present invention is to provide a brake pedal structure of a commercial vehicle and an adjustment method thereof that can effectively reduce the pedal force and quickly adjust the free travel in view of the deficiencies of the prior art.

[0004] The present invention is implemented by adopting the following technical solutions:

[0005] A brake pedal structure of a commercial vehicle, comprising a foot valve mounting housing, a pedal arm, a torsion spring, and a brake light switch;

[0006] The pedal arm, the torsion spring, and the brake light switch are provided on the foot valve mounting housing; the pedal arm is connected to the torsion spring and is used for the pedal arm to rotate and return on the foot valve mounting housing; the retractable structure of the brake light switch on the foot valve mounting housing contacts the pedal arm and is used for limiting the rotation of the pedal arm on the foot valve mounting housing.

[0007] As a further description of the invention, the brake pedal structure further includes a sleeve, a movable nut, and a bolt;

[0008] The pedal arm is fixedly provided on the sleeve, the torsion spring is sleeved on the sleeve, and the bolt is located on the foot valve mounting housing and penetrates through the pedal arm, the sleeve, and the torsion spring, and is fixed by the movable nut.

[0009] As a further description of the invention, the retractable structure of the brake light switch includes a fixed nut;

[0010] The fixed nut is fixedly provided on the foot valve mounting housing, and the contact head of the brake light switch is screwed through the fixed nut and contacts the pedal arm.

[0011] As a further description of the invention, the brake pedal structure further includes a push rod connecting plate, a foot valve push rod, a foot valve pedal arm, and a connecting pin shaft;

[0012] One end of the foot valve pedal arm is fixedly arranged on the sleeve, and the other end is connected to the push rod connecting plate through a connecting pin shaft; the push rod connecting plate is connected to the foot valve push rod.

[0013] As a further description of the invention, the brake pedal structure is assembled on the front wall of the cab; the foot valve push rod is connected to the foot valve spool, the foot valve spool is connected to the brake foot valve, the brake foot valve is assembled on the foot valve mounting housing, and the brake light switch is signal-connected to the instrument panel.

[0014] For the adjustment method of the commercial vehicle brake pedal structure as described in any one of the above, the adjustment method includes:

[0015] When the pedal arm is in the initial position, the contact of the brake light switch contacts the pedal arm to limit the initial position and angle of the pedal arm;

[0016] When it is necessary to increase the pedal free travel, reduce the screwing-in amount of the brake light switch on the foot valve mounting housing. Under the action of the torsion spring, the pedal arm, the foot valve pedal arm, and the sleeve rotate counterclockwise together around the center line of the sleeve by a certain amount until they contact the contact of the brake light switch, and the pedal free travel increases;

[0017] When it is necessary to reduce the pedal free travel, increase the screwing-in amount of the brake light switch on the foot valve mounting housing, so that the pedal arm, the foot valve pedal arm, and the sleeve rotate clockwise together around the center line of the sleeve by a certain amount until they contact the contact of the brake light switch, and the pedal free travel decreases.

[0018] As a further description of the invention, the adjustment method further includes:

[0019] When the pedal arm is depressed, the pedal arm, the foot valve pedal arm, and the sleeve rotate clockwise together around the center line of the sleeve. The foot valve push rod pushes the brake foot valve spool downward, the brake foot valve valve opens, the brake air pressure is conducted to the brake chamber, and the whole vehicle generates braking force; at the same time, when the pedal arm is just depressed, the contact of the brake light switch is separated from the pedal arm, and the brake light switch sends a signal to the instrument panel;

[0020] When the pedal arm is released, under the action of the torsion spring, the pedal arm, the foot valve pedal arm, and the sleeve rotate counterclockwise together around the center line of the sleeve until the pedal arm contacts the contact of the brake light switch; the foot valve push rod moves upward, the brake foot valve spool moves upward, the brake foot valve valve closes, the air pressure in the brake chamber decreases, and the vehicle braking is released; at the same time, the pedal arm contacts and presses the contact of the brake light switch, and the signal of the brake light switch is disconnected.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] The present invention mainly consists of a pedal arm, a foot valve mounting housing, a welding nut, a brake light switch, a push rod connecting plate, a foot valve push rod, a foot valve pedal arm, a connecting pin shaft, a sleeve, a torsion spring, a nut, and a bolt. With the structure of the present invention, the torsion spring can shorten the spring force arm, effectively reduce the maximum pedal force of the pedal, improve the pedal feel level of the pedal mechanism, and under the action of the torsion spring when the brake pedal is released, the pedal arm can quickly return to the starting position. The brake light switch with the structure of the present invention can not only adjust the size of the dead travel, but also send a brake light signal. When adjusting the dead travel, it is not restricted by the interior space of the vehicle, and the size of the dead travel can be quickly adjusted by operation. Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the present invention Figure 1 ;

[0024] Figure 2 is the overall structural schematic diagram of the present invention Figure 2 ;

[0025] Figure 3 is Figure 2 the exploded structural schematic diagram of

[0026] Among them, 1. Pedal arm; 2. Foot valve mounting housing; 3. Fixed nut; 4. Brake light switch; 5. Push rod connecting plate; 6. Foot valve push rod; 7. Foot valve pedal arm; 8. Connecting pin shaft; 9. Sleeve; 10. Torsion spring; 11. Movable nut; 12. Bolt. Detailed Embodiment

[0027] Hereinafter, in conjunction with the drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] The orientation terms appearing in the following description are all the directions shown in the drawings, and are not intended to limit the specific structure of the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] For a better understanding of the present invention, the following is combined with Figures 1 - 3A detailed description is given to the commercial vehicle brake pedal structure and its adjustment method provided by the embodiments of the present invention.

[0030] Please refer to Figures 1 - 3 , an embodiment of the present invention provides a commercial vehicle brake pedal structure, including a foot valve mounting housing 2, a pedal arm 1, a torsion spring 10, and a brake light switch 4;

[0031] The pedal arm 1, the torsion spring 10, and the brake light switch 4 are arranged on the foot valve mounting housing 2; the pedal arm 1 is connected to the torsion spring 10 and is used for the pedal arm 1 to rotate and return to its original position on the foot valve mounting housing 2; the telescopic structure of the brake light switch 4 on the foot valve mounting housing 2 contacts the pedal arm 1 and is used for limiting the rotation of the pedal arm 1 on the foot valve mounting housing 2.

[0032] The following further describes in detail the specific structure in which the pedal arm 1 provided by the embodiment of the present invention realizes rotational return under the action of the torsion spring 10 with reference to the accompanying drawings.

[0033] Combined with Figure 2 , Figure 3 as shown, a sleeve 9, a movable nut 11, and a bolt 12 are further provided on the basis of the pedal arm 1 and the torsion spring 10;

[0034] The pedal arm 1 is fixedly arranged on the sleeve 9, the torsion spring 10 is sleeved on the sleeve 9, the bolt 12 is located on the foot valve mounting housing 2 and penetrates through the pedal arm 1, the sleeve 9, and the torsion spring 10, and is fixed by the movable nut 11; so that the pedal arm 1 and the sleeve 9 jointly rotate around the central axis of the sleeve 9; one end of the torsion spring 10 passes through the fixing hole on the foot valve pedal arm 7, and the other end passes through the fixing hole on the foot valve mounting housing 2. Using this structure, the torsion spring 10 can shorten the spring force arm, effectively reduce the maximum pedal force of the pedal, improve the pedal feel level of the pedal mechanism, and when the brake pedal is released, under the action of the torsion spring 10, the pedal arm can quickly return to the starting position.

[0035] The following further describes in detail how the pedal arm 1 provided by the embodiment of the present invention realizes the rotation initial position and angle limit under the action of the brake light switch 4, and realizes the quick adjustment of the pedal free travel size with reference to the accompanying drawings.

[0036] Combined with Figure 1 , Figure 2 , Figure 3 , a fixing nut 3 is further provided on the basis that the telescopic structure of the brake light switch 4 on the foot valve mounting housing 2 contacts the pedal arm 1;

[0037] The fixed nut 3 is welded to the back surface of the foot valve mounting housing 2, and the contact head of the brake light switch 4 is screwed through the fixed nut 3 to contact the pedal arm 1; by adjusting the thread depth of the brake light switch 4 on the fixed nut 3, the starting position of the pedal arm 1 can be limited and adjusted. At the same time, it is better that the contact surface between the pedal arm 1 and the fixed nut 3 is an inclined plane, which can limit and adjust the starting angle of the pedal arm 1 and quickly adjust the size of the pedal free travel.

[0038] In addition to the function of realizing the rotation initial position and angle limit of the above-mentioned pedal arm 1 under the action of the brake light switch 4, a brake signal reminder function is also provided. The following will be described in combination with the braking process of the brake pedal.

[0039] Combined with Figure 2 and Figure 3 , on the basis that the pedal arm 1 rotates and returns under the action of the torsion spring 10, a push rod connecting plate 5, a foot valve push rod 6, a foot valve pedal arm 7, and a connecting pin shaft 8 are further provided;

[0040] One end of the foot valve pedal arm 7 is fixedly arranged on the sleeve 9, and the other end is connected to the push rod connecting plate 5 through the connecting pin shaft 8; the push rod connecting plate 5 is connected to the foot valve push rod 6, so that while the pedal arm 1, the foot valve pedal arm 7, and the sleeve 9 rotate together with the center line of the sleeve 9 as the axis, the foot valve push rod 6 moves up and down on the foot valve mounting housing 2.

[0041] The embodiment of the present invention also provides a commercial vehicle, including the above-mentioned brake pedal structure. Taking the commercial vehicle as an example, the brake pedal structure is assembled to the front panel of the commercial vehicle cab, and the adjustment can be carried out by adjusting the installation depth of the brake light switch 4 on the outside of the cab; the foot valve push rod 6 is connected to the foot valve spool, the foot valve spool is connected to the brake foot valve, the brake foot valve is assembled to the foot valve mounting housing 2, and the brake light switch 4 is signal-connected to the instrument panel.

[0042] For the adjustment method of the above-mentioned commercial vehicle brake pedal structure, the pedal free travel adjustment method includes:

[0043] When the pedal arm 1 is in the initial position, the contact head of the brake light switch 4 contacts the pedal arm 1 to limit the initial position and angle of the pedal arm 1;

[0044] When it is necessary to increase the pedal free travel, reduce the screwing amount of the brake light switch 4 on the foot valve mounting housing 2. Under the action of the torsion spring 10, the pedal arm 1, the foot valve pedal arm 7, and the sleeve 9 rotate in the opposite direction together with the center line of the sleeve 9 by a certain amount until they contact the contact head of the brake light switch 4, and the pedal free travel increases;

[0045] When it is necessary to reduce the pedal free travel, increase the screwing-in amount of the brake light switch 4 on the foot valve mounting housing 2, so that the pedal arm 1, the foot valve pedal arm 7, and the sleeve 9 jointly rotate a certain amount in the positive direction around the center line of the sleeve 9 until they contact the contact of the brake light switch 4, and the pedal free travel is reduced.

[0046] The braking signal reminder method includes:

[0047] When the pedal arm 1 is depressed, the pedal arm 1, the foot valve pedal arm 7, and the sleeve 9 jointly rotate in the positive direction around the center line of the sleeve 9. The foot valve push rod 6 pushes the brake foot valve spool downward, the brake foot valve valve opens, the braking air pressure is conducted to the brake chamber, and the whole vehicle generates braking force; at the same time, when the pedal arm 1 is just depressed, the contact of the brake light switch 4 is disengaged from the pedal arm 1, and the brake light switch 4 sends a signal to the instrument panel;

[0048] When the pedal arm 1 is released, under the action of the torsion spring 10, the pedal arm 1, the foot valve pedal arm 7, and the sleeve 9 rotate in the reverse direction around the center line of the sleeve 9 until the pedal arm 1 contacts the contact of the brake light switch 4; the foot valve push rod 6 moves upward, the brake foot valve spool moves upward, the brake foot valve valve closes, the air pressure in the brake chamber drops to 0, and the braking of the whole vehicle is released; at the same time, the pedal arm 1 contacts and presses the contact of the brake light switch 4, and the signal of the brake light switch 4 is disconnected.

Claims

1. A brake pedal structure for a commercial vehicle, characterized in that, It includes a foot valve mounting housing (2), a pedal arm (1), a torsion spring (10), and a brake light switch (4); The pedal arm (1), the torsion spring (10), and the brake light switch (4) are arranged on the foot valve mounting housing (2); the pedal arm (1) is connected to the torsion spring (10) and is used for the pedal arm (1) to rotate and return to its position on the foot valve mounting housing (2); the retractable structure of the brake light switch (4) on the foot valve mounting housing (2) contacts the pedal arm (1) and is used for limiting the rotation of the pedal arm (1) on the foot valve mounting housing (2).

2. The structure of the commercial vehicle brake pedal according to claim 1, wherein The brake pedal structure further includes a sleeve (9), a movable nut (11), and a bolt (12); The pedal arm (1) is fixedly arranged on the sleeve (9), the torsion spring (10) is sleeved on the sleeve (9), the bolt (12) is located on the foot valve mounting housing (2) and passes through the pedal arm (1), the sleeve (9), and the torsion spring (10), and is fixed by the movable nut (11).

3. The structure of the brake pedal for a commercial vehicle according to claim 2, characterized in that, The retractable structure of the brake light switch (4) includes a fixing nut (3); The fixing nut (3) is fixedly arranged on the foot valve mounting housing (2), and the contact head of the brake light switch (4) is screwed through the fixing nut (3) to contact the pedal arm (1).

4. The structure of the commercial vehicle brake pedal according to claim 3, wherein, The brake pedal structure further includes a push rod connecting plate (5), a foot valve push rod (6), a foot valve pedal arm (7), and a connecting pin shaft (8); One end of the foot valve pedal arm (7) is fixedly arranged on the sleeve (9), and the other end is connected to the push rod connecting plate (5) through the connecting pin shaft (8); the push rod connecting plate (5) is connected to the foot valve push rod (6).

5. The structure of a commercial vehicle brake pedal according to claim 4, characterized in that, The brake pedal structure is assembled to the front panel of the cab; the foot valve push rod (6) is connected to the foot valve spool, the foot valve spool is connected to the brake foot valve, the brake foot valve is assembled to the foot valve mounting housing (2), and the brake light switch (4) is signal-connected to the instrument panel.

6. The adjustment method of the commercial vehicle brake pedal structure according to any one of claims 1-5, characterized in that, The adjustment method includes: When the pedal arm (1) is in the initial position, the contact head of the brake light switch (4) contacts the pedal arm (1) to limit the initial position and angle of the pedal arm (1); When it is necessary to increase the pedal free travel, reduce the screwing-in amount of the brake light switch (4) on the foot valve mounting housing (2). Under the action of the torsion spring (10), the pedal arm (1), the foot valve pedal arm (7), and the sleeve (9) jointly rotate in the reverse direction by a certain amount with the center line of the sleeve (9) as the axis until they contact the contact head of the brake light switch (4), and the pedal free travel increases; When it is necessary to reduce the pedal free travel, increase the screwing-in amount of the brake light switch (4) on the foot valve mounting housing (2), so that the pedal arm (1), the foot valve pedal arm (7), and the sleeve (9) jointly rotate in the positive direction by a certain amount with the center line of the sleeve (9) as the axis until they contact the contact head of the brake light switch (4), and the pedal free travel decreases.

7. The adjustment method of the commercial vehicle brake pedal structure according to claim 6, characterized in that, The adjustment method further includes: When the pedal arm (1) is depressed, the pedal arm (1), the foot valve pedal arm (7), and the sleeve (9) jointly rotate in the positive direction with the center line of the sleeve (9) as the axis. The foot valve push rod (6) pushes the brake foot valve spool downward, the brake foot valve valve opens, the braking air pressure is conducted to the brake chamber, and braking force is generated on the whole vehicle. At the same time, when the pedal arm (1) is just depressed, the contact of the brake light switch (4) disengages from the pedal arm (1), and the brake light switch (4) sends a signal to the instrument panel. When the pedal arm (1) is released, under the action of the torsion spring (10), the pedal arm (1), the foot valve pedal arm (7), and the sleeve (9) rotate in the reverse direction with the center line of the sleeve (9) as the axis until the pedal arm (1) contacts the contact of the brake light switch (4). The foot valve push rod (6) moves upward, the brake foot valve spool moves upward, the brake foot valve valve closes, the air pressure in the brake chamber drops to 0, and the braking of the whole vehicle is released. At the same time, the pedal arm (1) contacts and presses the contact of the brake light switch (4), and the signal of the brake light switch (4) is disconnected.

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