Pressure feedback structure of hydraulic brake device

Abstract

The utility model provides a pressure feedback structure of a hydraulic brake device, and belongs to the technical field of hydraulic pressure. The hydraulic braking device solves the problem that an existing hydraulic braking device is low in braking response speed. According to the pressure feedback structure of the hydraulic braking device, the hydraulic braking device comprises a valve body and a braking rod used for transmitting braking force into the valve body, a supporting frame is fixed to the valve body, the braking rod is hinged to the supporting frame, a braking pedal is fixedly connected to the end of the braking rod, and the pressure feedback structure comprises a connecting rod and a displacement sensor fixed to the supporting frame. The connecting rod is located between the supporting frame and the brake rod, the displacement sensor is provided with a detection head which is fixedly connected with one end of the connecting rod and can rotate, the brake rod is provided with an open groove, the other end of the connecting rod is provided with a follower embedded in the open groove, and when the brake rod rotates, the follower moves along the groove wall of the open groove so that the connecting rod can drive the detection head to rotate. The pressure feedback structure of the hydraulic braking device has the advantage of improving the braking response speed of the hydraulic braking device.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulics and relates to a pressure feedback structure of a hydraulic braking device. Background Art

[0002] The hydraulic braking device comprises a brake valve and a brake lever. One end of the brake lever is connected to a brake pedal. A valve core and a push rod connected to the brake lever are arranged in the brake valve. When a driver steps on the brake pedal, the brake lever drives the valve core to move through the push rod to control the hydraulic oil. An additional braking force is provided by a hydraulic system to reduce the force required for the driver to step on the brake pedal, thereby achieving power-assisted braking.

[0003] In the hydraulic braking device, the brake pedal is a trigger structure of the hydraulic braking device. In the prior art, in order to improve the response speed of the hydraulic braking device, a dead travel is added at the initial stage of the moving stroke of the brake pedal. When the driver steps on the dead travel, no pressure is built up in the valve body. Only when the driver continues to step down the brake pedal, the brake lever can drive the valve core to move through the push rod, the valve opens, the oil pump outputs hydraulic oil, and the hydraulic oil enters the valve body, so that pressure is built up in the valve body. Therefore, the existing hydraulic braking device has the problem of slow braking response speed. Summary of the Invention

[0004] The purpose of the utility model is to solve the problem of slow braking response speed of the hydraulic braking device by providing a pressure feedback structure of the hydraulic braking device for the above problems existing in the prior art.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] A pressure feedback structure of a hydraulic braking device. The hydraulic braking device comprises a valve body and a brake rod for transmitting a braking force into the valve body. A support frame is fixed on the valve body. The brake rod is hinged to the support frame, and a brake pedal is fixedly connected to the end of the brake rod. The pressure feedback structure is characterized in that the pressure feedback structure comprises a connecting rod and a displacement sensor fixed on the support frame. The connecting rod is located between the support frame and the brake rod. The displacement sensor has a detection head fixedly connected to one end of the connecting rod and capable of rotating. An opening groove is formed on the brake rod. A follower is arranged at the other end of the connecting rod and embedded in the opening groove. When the brake rod rotates, the follower moves along the groove wall of the opening groove, so that the connecting rod drives the detection head to rotate.

[0007] When the driver only steps on the idle travel of the brake pedal, the brake rod will rotate. The present application directly transmits the rotation amplitude of the brake rod to the detection head of the displacement sensor through the connecting rod. Specifically, the structure is to fix one end of the connecting rod to the detection head of the displacement sensor, set an open groove on the brake rod, and embed the follower at the other end of the connecting rod in the open groove, so that the open groove provides a clearance space for the swing of the connecting rod. When the brake rod drives the follower to move along the open groove, the connecting rod directly drives the detection head of the displacement sensor to rotate, and then the displacement sensor feeds back an electrical signal to the control system of the hydraulic brake device, so that the control system controls the displacement of the oil pump in advance. When the valve of the valve body is opened, the hydraulic oil can quickly enter the valve body, thereby improving the braking response speed of the hydraulic brake device.

[0008] In the pressure feedback structure of the hydraulic brake device, the support frame includes a main board fixedly connected to the valve body, the brake rod is hinged on the main board, a mounting plate is fixedly connected to the side of the main board facing the brake rod, the connecting rod is located on the side of the mounting plate facing the brake rod, and the displacement sensor is fixedly connected to the other side of the mounting plate. The installation of the displacement sensor and the installation of the brake rod are both based on the main board. On this basis, the mounting plate is fixedly connected to the main board so that the mounting plate is used as an extension plate of the main board. On the one hand, the displacement sensor and the brake rod are staggered, which is convenient for the arrangement of the connecting rod. On the other hand, the distance between the connecting rod and the brake rod is shortened, and the swing stability of the connecting rod is improved. The displacement sensor is fixedly connected to the other side of the mounting plate, which increases the layout area of ​​the displacement sensor while improving the compactness of the structure, so that the power transmission is stable.

[0009] In the pressure feedback structure of the hydraulic brake device, the mounting plate has an L-shaped support portion and a connection portion fixedly connected to the main board, the bottom end of the support portion is fixedly connected to the connection portion, and the displacement sensor is fixedly connected to the support portion and is located above the connection portion. The support portion staggers the displacement sensor and the brake rod, further shortens the distance between the connecting rod and the brake rod, and avoids interference between the connecting rod and the connection portion during power transmission, further improving the stability of power transmission.

[0010] In the pressure feedback structure of the hydraulic brake device, there is a gap between the connecting rod and the brake rod, and there is a gap between the connecting rod and the support part. The gap is set to avoid interference between the connecting rod and the brake rod or the support part when the connecting rod swings, thereby improving the stability of power transmission.

[0011] In the pressure feedback structure of the above hydraulic braking device, one end of the connecting rod faces the supporting part and is provided with a through hole, and one side of the connecting rod has a slot communicated with the through hole and for inserting a fastener. The detection head is inserted into the through hole, and the detection head has a positioning hole communicated with the slot. Since the displacement sensor is fixedly connected to one side of the support, the position of the detection head is determined. During installation, the detection head is inserted into the through hole, the positioning hole is aligned with the slot, and the fastener is inserted into the slot and passed through the positioning hole, so that one end of the detection head can be fixedly connected to the detection head, ensuring the distance between the connecting rod and the supporting part and improving the connection stability between the detection head and the connecting rod.

[0012] In the pressure feedback structure of the above hydraulic braking device, the other end of the connecting rod faces the brake rod and has a boss. The diameter of the boss is smaller than the width of the opening groove. A threaded hole is provided in the boss. The pressure feedback structure further includes a bolt screwed into the threaded hole. The follower is a roller. The roller is sleeved on the rod part of the bolt, and the outer wall of the follower abuts against the wall of the opening groove. This structure positions the follower between the rod part of the bolt and the boss. The follower can rotate relative to the bolt, avoiding jamming when the brake rod drives the follower to move along the wall of the opening groove. If the connecting rod itself is skewed or skewed during power transmission, since the diameter of the boss is smaller than the width of the opening groove, interference between the connecting rod and the brake rod is avoided to ensure the smoothness of power transmission.

[0013] In the pressure feedback structure of the above hydraulic braking device, a support rod and a limiting member are fixedly connected to the support frame. The brake rod has a flange part located between the support rod and the limiting member. The hydraulic braking device further includes a return spring connecting the support rod and the brake rod and pressing the brake rod against the limiting member. The flange part has the above-mentioned opening groove. The limiting member defines the initial position of the brake rod, and the support rod defines the maximum rotation amplitude of the brake rod. By arranging the opening groove on the flange part, the swing trajectory of the connecting rod is determined. Therefore, the depth of the opening groove can be set according to the swing trajectory of the connecting rod to ensure the smoothness of power transmission.

[0014] In the pressure feedback structure of the above hydraulic braking device, the opening groove is a U-shaped groove with an upward opening, and the displacement sensor is located above the opening groove. The displacement sensor is arranged according to the position of the opening groove, shortening the layout length of the connecting rod. Moreover, the structure with the upward opening of the opening groove ensures that the connecting rod is not pressed by the brake rod in the initial state and reduces the processing accuracy of the opening groove.

[0015] In the pressure feedback structure of the above hydraulic braking device, the distance between the axis of the follower and the axis of rotation of the brake rod is less than the distance between the axis of the follower and the axis of the through hole. This structure improves the swing stability of the connecting rod.

[0016] In the pressure feedback structure of the hydraulic braking device described above, the support frame further includes a secondary plate fixedly connected to the valve body. The limiting member is rod-shaped. One end of the limiting member abuts against and is fixedly connected to the main plate, and the other end of the limiting member abuts against and is fixedly connected to the secondary plate. The braking rod is rotatably connected between the main plate and the secondary plate. The main plate and the secondary plate respectively support the two ends of the limiting member, improving the structural strength of the limiting member. The braking rod is rotatably connected between the main plate and the secondary plate, so that the distance between the main plate and the braking rod is determined, ensuring the layout space of the connecting rod.

[0017] Compared with the prior art, the pressure feedback structure of the hydraulic braking device provided by the present utility model has the following advantages: when the braking rod rotates, it drives the follower to move along the groove wall of the opening groove, so that the connecting rod drives the detection head to rotate. Further, the displacement sensor feeds back an electrical signal to the control system of the hydraulic braking device, enabling the control system to pre-control the displacement of the oil pump in advance. When the valve of the valve body is opened, the hydraulic oil can quickly enter the valve body, thereby improving the braking response speed of the hydraulic braking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present hydraulic braking device.

[0019] Figure 2 is Figure 1 a partial enlarged view of part A in

[0020] Figure 3 is Figure 2 a partial enlarged view of part B in

[0021] Figure 4 is a schematic diagram of the pressure feedback structure of the present hydraulic braking device.

[0022] In the figure, 1, valve body; 2, braking rod; 21, opening groove; 22, flange part; 3, support frame; 31, main plate; 32, mounting plate; 321, support part; 322, connecting part; 33, support rod; 34, limiting member; 35, secondary plate; 4, brake pedal; 5, connecting rod; 51, through hole; 52, slot; 53, boss; 6, displacement sensor; 61, detection head; 62, positioning hole; 7, follower; 8, bolt; 9, return spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following are specific embodiments of the present utility model in combination with the drawings, and the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0024] As Figure 1As shown, the pressure feedback structure of a hydraulic braking device. The hydraulic braking device includes a valve body 1 and a brake rod 2 for transmitting braking force into the valve body 1. A support frame 3 is fixed on the valve body 1. The brake rod 2 is hinged to the support frame 3, and a brake pedal 4 is fixedly connected to the end of the brake rod 2. The pressure feedback structure includes a connecting rod 5 and a displacement sensor 6 fixed on the support frame 3. The connecting rod 5 is located between the support frame 3 and the brake rod 2. The displacement sensor 6 has a detection head 61 fixedly connected to one end of the connecting rod 5 and capable of rotating. There is an opening groove 21 on the brake rod 2. The other end of the connecting rod 5 is provided with a follower 7 embedded in the opening groove 21. When the brake rod 2 rotates, the follower 7 moves along the groove wall of the opening groove 21, causing the connecting rod 5 to drive the detection head 61 to rotate.

[0025] As Figure 1 shown, the support frame 3 includes a main board 31 fixedly connected to the valve body 1 and a sub-board 35 fixedly connected to the valve body 1. The brake rod 2 is rotatably connected between the main board 31 and the sub-board 35 through a hinge shaft. On the side of the main board 31 facing the brake rod 2, a mounting plate 32 is fixedly connected. The connecting rod 5 is located on the side of the mounting plate 32 facing the brake rod 2. The displacement sensor 6 is fixedly connected to the other side of the mounting plate 32. The mounting plate 32 has an L-shaped support portion 321 and a connecting portion 322 fixedly connected to the main board 31. The bottom end of the support portion 321 is fixedly connected to the connecting portion 322. The support portion 321 and the connecting portion 322 are of an integral structure. The displacement sensor 6 is fixedly connected to the support portion 321 and is located above the connecting portion 322. There is a gap between the connecting rod 5 and the brake rod 2, and there is a gap between the connecting rod 5 and the support portion 321.

[0026] As Figure 2 and Figure 3 shown, one end of the connecting rod 5 faces the support portion 321 and is provided with a through hole 51. And one side of the connecting rod 5 has a slot 52 communicating with the through hole 51 and for inserting a fastener. The fastener here is a pin. The detection head 61 passes through the through hole 51, and the detection head 61 has a positioning hole 62 communicating with the slot 52.

[0027] As Figure 3 shown, the other end of the connecting rod 5 faces the brake rod 2 and has a boss 53. A threaded hole is opened on the boss 53. The pressure feedback structure further includes a bolt 8 screwed into the threaded hole. The follower 7 is a roller. The follower 7 is sleeved on the rod portion of the bolt 8, and the outer wall of the follower 7 abuts against the groove wall of the opening groove 21.

[0028] As Figure 4As shown, a support rod 33 and a limiting member 34 are fixedly connected to the support frame 3. The limiting member 34 is rod-shaped. One end of the limiting member 34 abuts against the main board 31 and the two are fixedly connected, and the other end of the limiting member 34 abuts against the auxiliary board 35 and the two are fixedly connected. The brake lever 2 has a flange portion 22 located between the support rod 33 and the limiting member 34. The hydraulic braking device further includes a return spring 9 connecting the support rod 33 and the brake lever 2 and making the brake lever 2 abut against the limiting member 34. The flange portion 22 has the above-mentioned opening groove 21, and the opening groove 21 is a U-shaped groove with an upward opening. The displacement sensor 6 is located above the opening groove 21. The distance between the axis of the follower 7 and the rotation axis of the brake lever 2 is less than the distance between the axis of the follower 7 and the axis of the through hole 51.

[0029] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0030] Although terms such as valve body 1, brake lever 2, opening groove 21, flange portion 22, support frame 3, main board 31, mounting board 32, support portion 321, connecting portion 322, support rod 33, limiting member 34, auxiliary board 35, brake pedal 4, connecting rod 5, through hole 51, slot 52, boss 53, displacement sensor 6, detection head 61, positioning hole 62, follower 7, bolt 8, return spring 9, etc. are used more in this article, the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A pressure feedback structure of a hydraulic braking device. The hydraulic braking device includes a valve body (1) and a brake rod (2) for transmitting braking force into the valve body (1). A support frame (3) is fixed on the valve body (1). The brake rod (2) is hinged to the support frame (3), and a brake pedal (4) is fixedly connected to the end of the brake rod (2). It is characterized in that, The pressure feedback structure includes a connecting rod (5) and a displacement sensor (6) fixed on a support frame (3). The connecting rod (5) is located between the support frame (3) and the brake rod (2). The displacement sensor (6) has a detection head (61) fixedly connected to one end of the connecting rod (5) and capable of rotating. The brake rod (2) has an opening groove (21). The other end of the connecting rod (5) is provided with a follower (7) embedded in the opening groove (21). When the brake rod (2) rotates, the follower (7) moves along the groove wall of the opening groove (21), causing the connecting rod (5) to drive the detection head (61) to rotate.

2. The pressure feedback structure of the hydraulic braking device according to claim 1, characterized in that, The support frame (3) includes a main board (31) fixedly connected to the valve body (1). The brake rod (2) is hinged to the main board (31). An installation board (32) is fixedly connected to one side of the main board (31) facing the brake rod (2). The connecting rod (5) is located on the side of the installation board (32) facing the brake rod (2). The displacement sensor (6) is fixedly connected to the other side of the installation board (32).

3. The pressure feedback structure of the hydraulic braking device according to claim 2, characterized in that, The installation board (32) has an L-shaped support portion (321) and a connecting portion (322) fixedly connected to the main board (31). The bottom end of the support portion (321) is fixedly connected to the connecting portion (322). The displacement sensor (6) is fixedly connected to the support portion (321) and is located above the connecting portion (322).

4. The pressure feedback structure of the hydraulic braking device according to claim 3, characterized in that There is a gap between the connecting rod (5) and the brake rod (2), and there is a gap between the connecting rod (5) and the support portion (321).

5. The pressure feedback structure of the hydraulic braking device according to claim 3, characterized in that, One end of the connecting rod (5) faces the support portion (321) and is provided with a through hole (51). One side of the connecting rod (5) has a slot (52) communicating with the through hole (51) for a fastener to be inserted. The detection head (61) passes through the through hole (51), and the detection head (61) has a positioning hole (62) communicating with the slot (52).

6. The pressure feedback structure of the hydraulic braking device according to claim 5, characterized in that, The other end of the connecting rod (5) faces the brake rod (2) and has a boss (53). The diameter of the boss (53) is smaller than the width of the opening groove (21). A threaded hole is provided in the boss (53). The pressure feedback structure further includes a bolt (8) screwed into the threaded hole. The follower (7) is a roller and is sleeved on the rod portion of the bolt (8), and the outer wall of the follower (7) abuts against the groove wall of the opening groove (21).

7. The pressure feedback structure of the hydraulic braking device according to any one of claims 1 to 6, characterized in that, A support rod (33) and a limiting member (34) are fixedly connected to the support frame (3). The brake rod (2) has a flange portion (22) located between the support rod (33) and the limiting member (34). The hydraulic braking device further includes a return spring (9) connecting the support rod (33) and the brake rod (2) and causing the brake rod (2) to abut against the limiting member (34). The flange portion (22) has the above-mentioned opening groove (21).

8. The pressure feedback structure of the hydraulic braking device according to claim 7, characterized in that, The opening groove (21) is a U-shaped groove with an upward opening, and the displacement sensor (6) is located above the opening groove (21).

9. The pressure feedback structure of the hydraulic braking device according to claim 5 or 6, characterized in that, The distance between the axis of the follower (7) and the rotation axis of the brake rod (2) is smaller than the distance between the axis of the follower (7) and the axis of the through hole (51).

10. The pressure feedback structure of the hydraulic braking device according to claim 7, characterized in that, The support frame (3) further includes a secondary plate (35) fixedly connected to the valve body (1). The limiting member (34) is rod-shaped. One end of the limiting member (34) abuts against the main plate (31) and the two are fixedly connected, and the other end of the limiting member (34) abuts against the secondary plate (35) and the two are fixedly connected. The brake rod (2) is rotatably connected between the main plate (31) and the secondary plate (35).

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