Electromagnetic hand brake upper pump

Abstract

The utility model discloses an electromagnetic hand brake upper pump, which belongs to the technical field of electric vehicle equipment and comprises an upper pump main body, an oil cavity and an accommodating cavity are arranged in the upper pump main body, the accommodating cavity is communicated with the oil cavity, an internal plunger rod is slidably connected in the oil cavity, and an external plunger rod is slidably connected in the accommodating cavity. A non-magnetic spring is clamped between the external plunger rod and the internal plunger rod; an oil outlet assembly is arranged at the end, away from the outer plunger rod, of the oil cavity, an oil inlet assembly is arranged on the oil cavity, and a reset assembly is arranged between the oil outlet assembly and the inner plunger rod. An electromagnetic coil is arranged in the containing cavity and arranged outside the outer plunger rod in a sleeving mode, a brake handle is rotationally connected to the upper pump body, and the propelling end of the brake handle makes contact with the end, away from the inner plunger rod, of the outer plunger rod. According to the utility model, the braking process can be regulated and controlled, the instability phenomenon of the vehicle caused by excessive reduction of the wheel speed is reduced, and the stability of the vehicle in the braking process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle equipment, in particular to an electromagnetic handbrake upper pump. Background Art

[0002] The braking system is a vital part of vehicle safety performance, and the handbrake system is an important device for the driver to control the braking system, which plays a vital role in some light and two-wheeled vehicles. The handbrake system usually includes a handle and a handbrake pump, which is used to respond to the driver's action input to control the parking and braking of the vehicle.

[0003] The existing handbrake upper pump relies on hydraulics to transmit the braking force input by the driver to the wheel end. This process is instantaneous, that is, when the driver provides braking force, the braking pressure at the wheel end increases immediately. When the driver cancels the brakes, the braking force will decrease rapidly. Therefore, the existing handbrake upper pump structure is difficult to adjust the vehicle's braking process, which can easily cause a large reduction in wheel speed, resulting in the vehicle rolling over or overturning.

[0004] For this reason, an electromagnetic handbrake upper pump is proposed. Utility Model Content

[0005] The utility model aims to provide an electromagnetic handbrake upper pump, aiming to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following scheme: the utility model provides an electromagnetic handbrake upper pump, comprising an upper pump body, an oil chamber and a receiving chamber are provided in the upper pump body, the receiving chamber is communicated with the oil chamber, an internal plunger rod is slidably connected in the oil chamber, an external plunger rod is slidably connected in the receiving chamber, a non-magnetic spring is sandwiched between the external plunger rod and the internal plunger rod; an oil outlet assembly is provided at one end of the oil chamber away from the external plunger rod, an oil inlet assembly is provided on the oil chamber, and a reset assembly is provided between the oil outlet assembly and the internal plunger rod;

[0007] An electromagnetic coil is arranged in the accommodating cavity, and the electromagnetic coil is sleeved outside the external plunger rod. A brake handle is rotatably connected to the upper pump body, and the thrust end of the brake handle contacts with an end of the external plunger rod away from the internal plunger rod.

[0008] Preferably, the reset assembly includes a reset spring sandwiched between the internal plunger rod and the side wall of the oil chamber, and the reset spring is located at one end of the internal plunger rod close to the oil outlet assembly.

[0009] Preferably, the oil outlet assembly includes an oil outlet bolt threadedly connected to the oil chamber, the oil outlet bolt is located at an end of the internal plunger rod away from the external plunger rod, an oil outlet channel connected to the oil chamber is provided on the oil outlet bolt, and the return spring is located between the internal plunger rod and the oil outlet bolt.

[0010] Preferably, an annular mounting groove is opened on the side wall of the accommodating cavity, a retaining spring is clamped in the annular mounting groove, a plunger rod limit is slidably connected in the accommodating cavity, the electromagnetic coil is clamped between the plunger rod limit and the accommodating cavity, and the plunger rod limit is clamped between the retaining spring and the electromagnetic coil.

[0011] Preferably, avoidance holes are respectively provided on the retaining spring and the plunger rod limiter, the external plunger rod passes through the avoidance hole, the size of the avoidance hole is smaller than the size of the inner ring of the electromagnetic coil, and a limiting ring is provided on the outer wall fixing sleeve of the external plunger rod, and the limiting ring is in sliding contact with the inner wall of the electromagnetic coil.

[0012] Preferably, a fixed sleeve on the outer wall of the inner plunger rod is provided with a conical piston and a plunger rod seal, the plunger rod seal is located between the conical piston and the outer plunger rod, and the conical piston and the plunger rod seal are respectively slidably connected to the inner wall of the oil chamber.

[0013] Preferably, the oil inlet assembly includes a master cylinder fixedly connected to the upper pump body, the master cylinder is provided with an oil inlet hole and an exhaust hole connected to the oil chamber, the master cylinder is detachably connected to an upper cover, and a sealing gasket is sandwiched between the upper cover and the master cylinder.

[0014] Preferably, a hinge bolt is fixed to the upper pump body, and the brake handle is rotatably connected to the hinge bolt.

[0015] The utility model discloses the following technical effects: the driver presses the brake handle tightly, pushing the internal plunger rod to make the brake hydraulic pressure in the oil chamber flow out to the oil outlet component, thereby applying braking force to the wheel; the electromagnetic coil generates an electromagnetic force on the internal plunger rod in the opposite direction to the braking force input by the driver, thereby regulating the braking process, reducing the instability of the vehicle caused by excessive reduction in wheel speed, and improving the stability of the vehicle during the braking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is an axonometric drawing of the utility model;

[0018] Figure 2It is an exploded view of the utility model;

[0019] Figure 3 It is a cross-sectional view of the utility model.

[0020] In the figure: 1. upper pump body; 2. brake handle; 3. return spring; 4. tapered piston; 5. plunger rod seal; 6. internal plunger rod; 7. non-magnetic spring; 8. external plunger rod; 9. electromagnetic coil; 10. plunger rod limit; 11. retaining spring; 12. oil outlet bolt; 13. hinge bolt; 14. master cylinder; 15. oil inlet hole; 16. exhaust hole; 17. copper gasket; 18. upper cover; 19. sealing gasket; 20. oil chamber; 21. accommodating chamber. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Reference Figure 1-Figure 3 The utility model provides an electromagnetic handbrake upper pump, including an upper pump body 1, an oil chamber 20 and a receiving chamber 21 are provided in the upper pump body 1, the receiving chamber 21 is communicated with the oil chamber 20, the receiving chamber 21 is communicated with the outside, an internal plunger rod 6 is slidably connected in the oil chamber 20, an external plunger rod 8 is slidably connected in the receiving chamber 21, and a non-magnetic spring 7 is sandwiched between the external plunger rod 8 and the internal plunger rod 6; an oil outlet assembly is provided at one end of the oil chamber 20 away from the external plunger rod 8, an oil inlet assembly is provided on the oil chamber 20, and a reset assembly is provided between the oil outlet assembly and the internal plunger rod 6;

[0024] An electromagnetic coil 9 is arranged in the accommodating chamber 21, and the electromagnetic coil 9 is sleeved outside the external plunger rod 8. A brake handle 2 is rotatably connected to the upper pump body 1, and the pushing end of the brake handle 2 contacts the end of the external plunger rod 8 away from the internal plunger rod 6;

[0025] In the present application, the power on and off of the electromagnetic coil 9 is controlled by a controller (not shown in the figure). When the driver operates the brake handle 2 to apply pressure to the wheel for braking, the controller can obtain the brake signal of the brake handle 2 and control the power on condition of the electromagnetic coil 9 according to the signal;

[0026] When the driver operates the brake handle 2, the thrust end in the brake handle 2 will push the external plunger rod 8 to move toward the oil outlet assembly, thereby driving the internal plunger rod 6 to move synchronously, so that the brake hydraulic pressure between the internal plunger rod 6 and the oil outlet assembly flows out to the oil outlet assembly, thereby achieving braking of the wheel, and the braking signal is transmitted to the controller. When the braking force increase process time reaches a threshold value preset inside the controller, the controller controls the electromagnetic coil 9 to be energized, and the electromagnetic coil 9 is energized to generate a magnetic field. The external plunger rod 8 is located in the electromagnetic coil 9, which can enhance the magnetic field and increase the suction. Therefore, after the electromagnetic coil 9 is energized, it can generate suction on the internal plunger rod 6, thereby applying a force opposite to the braking direction to the internal plunger rod 6, thereby achieving regulation of the braking force.

[0027] Further optimizing the solution, the reset assembly includes a reset spring 3 sandwiched between the internal plunger rod 6 and the side wall of the oil chamber 20, and the reset spring 3 is located at one end of the internal plunger rod 6 close to the oil outlet assembly;

[0028] The stiffness coefficient of the return spring 3 is smaller than that of the non-magnetic spring 7. When the wheel is braked, the internal plunger rod 6 squeezes the return spring 3, and the braking ends. Under the action of the return spring 3, the internal plunger rod 6 returns to the starting position.

[0029] A further optimized solution is provided, in which the oil outlet assembly includes an oil outlet bolt 12 threadedly connected to the oil chamber 20, the oil outlet bolt 12 is located at the end of the internal plunger rod 6 away from the external plunger rod 8, an oil outlet channel connected to the oil chamber 20 is opened on the oil outlet bolt 12, and the return spring 3 is located between the internal plunger rod 6 and the oil outlet bolt 12; a copper gasket 17 is sandwiched between the oil outlet bolt 12 and the upper pump body 1 to increase the sealing performance.

[0030] Further optimized solution, the side wall of the accommodating chamber 21 is provided with an annular mounting groove, a retaining spring 11 is clamped in the annular mounting groove, a plunger rod limiter 10 is slidably connected in the accommodating chamber 21, the electromagnetic coil 9 is clamped between the plunger rod limiter 10 and the accommodating chamber 21, and the plunger rod limiter 10 is clamped between the retaining spring 11 and the electromagnetic coil 9;

[0031] The retaining ring 11 and the plunger rod limit 10 are respectively provided with avoidance holes, and the external plunger rod 8 passes through the avoidance holes. The size of the avoidance hole is smaller than the size of the inner ring of the electromagnetic coil 9. The outer wall of the external plunger rod 8 is fixedly sleeved with a limit ring, and the limit ring is in sliding contact with the inner wall of the electromagnetic coil 9.

[0032] The electromagnetic coil 9 and the external plunger rod 8 are limited by the plunger rod limit 10 and the retaining spring 11 .

[0033] To further optimize the solution, a conical piston 4 and a plunger rod seal 5 are fixedly sleeved on the outer wall of the internal plunger rod 6, the plunger rod seal 5 is located between the conical piston 4 and the external plunger rod 8, and the conical piston 4 and the plunger rod seal 5 are slidingly connected to the inner wall of the oil chamber 20 respectively.

[0034] According to a further optimized solution, the oil inlet assembly includes a main cylinder 14 fixedly connected to the upper pump body 1, the main cylinder 14 is provided with an oil inlet hole 15 and an exhaust hole 16 connected to the oil chamber 20, the main cylinder 14 is detachably connected to an upper cover 18, and a sealing gasket 19 is sandwiched between the upper cover 18 and the main cylinder 14.

[0035] According to a further optimized solution, a hinge bolt 13 is fixedly connected to the upper pump body 1 , and the brake handle 2 is rotatably connected to the hinge bolt 13 .

[0036] When the utility model is in use, when the driver presses the brake handle 2, the brake handle 2 will push the external plunger rod 8 to move inside the oil chamber 20. Since the spring coefficient of the return spring 3 is smaller than the non-magnetic spring 7, the return spring 3 will be compressed first, so the external plunger rod 8 will drive the internal plunger rod 6 to move together through the non-magnetic spring 7. At this time, the conical piston 4 on the internal plunger rod 6 will release the brake fluid at the front end of the conical piston 4 to the outlet of the oil outlet bolt 12, and the brake fluid will flow to the wheel end brake through the hydraulic pipeline at the oil outlet bolt 12, thereby increasing the wheel end brake pressure and the wheel starts to brake.

[0037] When the driver presses the brake handle 2, the brake signal generated by the vehicle will activate the vehicle controller to control the electromagnetic coil 9: when the above-mentioned braking force increase process time reaches the threshold value preset in the controller, the controller controls the electromagnetic coil 9 to be energized, and the electromagnetic coil 9 generates an electromagnetic force on the internal plunger rod 6 in the opposite direction of the braking force input by the driver, hindering the pressure increase at the wheel end. After the power-on time reaches the set threshold, the controller turns off the power supply, and the braking pressure at the wheel end increases rapidly. The electromagnetic coil 9 is powered on and off at a preset frequency, thereby generating a cycle of pressurization and decompression to prevent the vehicle from being unstable due to excessive reduction in wheel speed. The cycle will be maintained until the driver stops braking and the brake handle 2 is reset to the initial position.

[0038] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. An electromagnetic handbrake upper pump, characterized in that: The invention comprises an upper pump body (1), wherein an oil chamber (20) and a receiving chamber (21) are provided in the upper pump body (1), wherein the receiving chamber (21) is communicated with the oil chamber (20), wherein an internal plunger rod (6) is slidably connected in the oil chamber (20), wherein an external plunger rod (8) is slidably connected in the receiving chamber (21), wherein a non-magnetic spring (7) is sandwiched between the external plunger rod (8) and the internal plunger rod (6); an oil outlet assembly is provided at one end of the oil chamber (20) away from the external plunger rod (8), an oil inlet assembly is provided on the oil chamber (20), and a reset assembly is provided between the oil outlet assembly and the internal plunger rod (6); An electromagnetic coil (9) is arranged in the accommodating chamber (21), and the electromagnetic coil (9) is sleeved outside the external plunger rod (8). A brake handle (2) is rotatably connected to the upper pump body (1), and the thrust end of the brake handle (2) is in contact with an end of the external plunger rod (8) away from the internal plunger rod (6).

2. The electromagnetic handbrake upper pump according to claim 1, characterized in that: The reset assembly comprises a reset spring (3) sandwiched between the internal plunger rod (6) and the side wall of the oil chamber (20); the reset spring (3) is located at one end of the internal plunger rod (6) close to the oil outlet assembly.

3. The electromagnetic handbrake upper pump according to claim 2, characterized in that: The oil outlet assembly comprises an oil outlet bolt (12) threadedly connected to the oil chamber (20); the oil outlet bolt (12) is located at an end of the internal plunger rod (6) away from the external plunger rod (8); an oil outlet channel communicating with the oil chamber (20) is provided on the oil outlet bolt (12); and the return spring (3) is located between the internal plunger rod (6) and the oil outlet bolt (12).

4. The electromagnetic handbrake upper pump according to claim 1, characterized in that: The side wall of the accommodating cavity (21) is provided with an annular mounting groove, a retaining spring (11) is clamped in the annular mounting groove, a plunger rod limiter (10) is slidably connected in the accommodating cavity (21), the electromagnetic coil (9) is clamped between the plunger rod limiter (10) and the accommodating cavity (21), and the plunger rod limiter (10) is clamped between the retaining spring (11) and the electromagnetic coil (9).

5. The electromagnetic handbrake upper pump according to claim 4, characterized in that: The retaining ring (11) and the plunger rod limiter (10) are respectively provided with avoidance holes, the external plunger rod (8) passes through the avoidance holes, the size of the avoidance holes is smaller than the size of the inner ring of the electromagnetic coil (9), and the outer wall of the external plunger rod (8) is fixedly sleeved with a limit ring, and the limit ring is in sliding contact with the inner wall of the electromagnetic coil (9).

6. The electromagnetic handbrake upper pump according to claim 1, characterized in that: A conical piston (4) and a plunger rod seal (5) are fixedly sleeved on the outer wall of the inner plunger rod (6); the plunger rod seal (5) is located between the conical piston (4) and the outer plunger rod (8); and the conical piston (4) and the plunger rod seal (5) are respectively slidably connected to the inner wall of the oil chamber (20).

7. The electromagnetic handbrake upper pump according to claim 1, characterized in that: The oil inlet assembly comprises a main cylinder (14) fixedly connected to the upper pump body (1); the main cylinder (14) is provided with an oil inlet hole (15) and an exhaust hole (16) which are connected to the oil chamber (20); the main cylinder (14) is detachably connected to an upper cover (18); a sealing gasket (19) is sandwiched between the upper cover (18) and the main cylinder (14).

8. The electromagnetic handbrake upper pump according to claim 1, characterized in that: A hinge bolt (13) is fixedly connected to the upper pump body (1), and the brake handle (2) is rotatably connected to the hinge bolt (13).

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