Electromagnetic hydraulic braking structure and electric control electromagnetic hydraulic braking calipers

Abstract

The invention relates to the technical field of electromagnetic brakes, in particular to an electromagnetic hydraulic braking structure and electric control electromagnetic hydraulic braking calipers. The electromagnetic hydraulic braking structure comprises a combined piston assembly, the combined piston assembly comprises a piston cylinder, the piston cylinder is provided with a first piston cavity and a second piston cavity which are communicated with each other, the first piston cavity is provided with a combined outer piston and a combined inner piston in a penetrating mode, and the second piston cavity is provided with a pressurizing small plunger in a penetrating mode; an oil storage cavity is formed outside the piston cylinder, and a plurality of oil holes are formed in the side wall of the piston cylinder and are communicated with the first piston cavity and the oil storage cavity; the electromagnet assembly comprises an armature, and the armature abuts against the combined inner piston; and the hydraulic braking assembly is internally provided with an oil way and communicates with the second piston cavity, and multi-stage pressure amplification is achieved through double-cavity linkage. Gap fluctuation between the brake pad and the brake disc in the braking process can be effectively controlled, the characteristic of large suction force of the tail end of the electromagnet is efficiently utilized, and meanwhile the stable braking effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic brake, in particular to an electromagnetic hydraulic braking structure and an electric control electromagnetic hydraulic braking caliper. BACKGROUND

[0002] The electromagnetic hydraulic braking system combines electromagnetic technology and hydraulic transmission, and adjusts the braking force by controlling the electromagnetic force and suction force.

[0003] For example, the invention application of the electromagnetic hydraulic system disc brake disclosed in Chinese patent CN114838067A can solve the technical problems of large volume, high weight, poor heat dissipation and difficult replacement of spare parts of the electromagnetic brake in the prior art. The deficiency is that when the gap between the brake pad and the brake disc fluctuates, the disc brake in the above-mentioned invention cannot effectively respond. SUMMARY

[0004] In view of the problems in the prior art, an electromagnetic hydraulic braking structure is proposed, which can effectively respond to the gap fluctuation between the brake disc and the brake disc. At the same time, an electric control electromagnetic hydraulic braking caliper applying the electromagnetic hydraulic braking structure is proposed.

[0005] To achieve the above technical effects, the present application proposes: An electromagnetic hydraulic braking structure, comprising: A combined piston assembly, comprising a piston cylinder having a first piston cavity and a second piston cavity in communication with each other, the first piston cavity being provided with a combined outer piston and a combined inner piston, and the second piston cavity being provided with a booster small piston; the piston cylinder is externally provided with an oil storage cavity, and the side wall is provided with a plurality of oil holes and is in communication with the first piston cavity and the oil storage cavity; An electromagnet assembly, comprising an armature abutting the combined inner piston; A hydraulic braking assembly, which is internally provided with an oil circuit and is in communication with the second piston cavity.

[0006] In the present application, the armature of the electromagnet assembly controls the internal movement of the combined piston assembly, further controls the flow direction of the hydraulic oil, and achieves the braking effect of the hydraulic braking assembly. The relative movement between the combined inner piston and the combined outer piston realizes the control of the gap fluctuation between the brake pad and the brake disc. The coordinated movement between the combined inner piston, the combined outer piston and the booster small piston can control the flow of hydraulic oil under different braking states, and the booster small piston has the effect of "controlling large pressure with small area", realizing stable braking.

[0007] The first piston cavity is provided with a limiting boss, the limiting boss is provided with a limiting through hole and is communicated with the second piston cavity, and the booster small plunger is arranged in the limiting through hole; the limiting boss is sleeved with an outer piston return spring, and the outer piston return spring abuts against the combined outer piston.

[0008] The combined outer piston is in a cylindrical shape and is provided with a through hole in an end face, the booster small plunger is arranged in the through hole; the outer side of the combined outer piston is provided with two sealing rings and is in sliding cooperation with the inner side of the piston cylinder.

[0009] The inner side wall of the combined outer piston is provided with a limiting ring, the combined inner piston is arranged in the inside of the combined outer piston and is limited between the limiting ring and the bottom of the combined outer piston.

[0010] The combined inner piston is provided with a boss structure and includes a first boss, a second boss and a third boss, the first boss abuts against the armature, the outer diameter of the second boss is smaller than the inner diameter of the limiting ring, the outer side of the third boss is provided with a sealing ring and is in sliding cooperation with the inner side of the combined outer piston; the combined inner piston is provided with a placing groove, the placing groove is provided with an inner piston return spring, and the placing groove is provided with a sealing block.

[0011] The booster small plunger includes a small diameter section and a large diameter section, the booster small plunger is provided with an oil passage through hole arranged along an axis, the small diameter section passes through the limiting through hole and is arranged in the through hole of the combined outer plunger, and the large diameter section is limited in the second piston cavity; a limiting table is screwed in the inside of the second piston cavity, the limiting table is provided with a through hole and is communicated with the second piston cavity and the oil passage; a small plunger return spring is arranged between the limiting table and the booster small plunger.

[0012] The hydraulic brake assembly includes a caliper, the caliper is provided with a pair of brake piston cylinders, brake pistons and brake discs, brake pads are arranged between the two brake discs; the oil passage is communicated with the two brake piston cylinders.

[0013] The electromagnet includes a magnet shell and a coil arranged in an inner disc, the armature is arranged in the magnet shell and the coil, the magnet shell is butted against the first piston cavity, and the armature abuts against the combined inner piston.

[0014] The oil storage cavity is formed by surrounding the piston cylinder and the magnet shell by an oil storage cavity shell.

[0015] An electric control electromagnetic hydraulic brake caliper, applying the above electromagnetic hydraulic brake structure, further includes an electric control unit connected with the electromagnet through a cable harness.

[0016] The beneficial effects of the present application are: 1. Through the combined piston structure, effectively deal with the gap fluctuation between the brake disc and the brake pad during braking; 2. Through the double-cavity linkage of the first piston cavity and the second piston cavity in the piston cylinder, realize multi-stage pressure amplification, cooperate with the booster small plunger to produce the effect of "small area controlling large pressure", and the braking effect is stable; 3. High overall integration. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural diagram of an electromagnetic hydraulic brake structure.

[0018] Figure 2 It is a structural diagram of a combined piston assembly.

[0019] Figure 3 It is a schematic diagram of each matching surface of the combined piston assembly.

[0020] Figure 4 It is a schematic diagram of the flow direction of hydraulic oil in the non-braking state.

[0021] Figure 5 It is a schematic diagram of the flow direction of hydraulic oil in the braking state one.

[0022] Figure 6 It is a schematic diagram of the flow direction of hydraulic oil in the braking state two.

[0023] Figure 7 It is a connection relationship diagram of the electric control electromagnetic hydraulic caliper.

[0024] Figure 8 It is a structural diagram of the electric control electromagnetic hydraulic caliper.

[0025] In the figure: 100, combined piston assembly; 200, electromagnet assembly; 300, hydraulic brake assembly; 400, oil storage cavity; 500, cable harness; 101, piston cylinder; 102, first piston cavity; 103, second piston cavity; 104, combined outer piston; 105, combined inner piston; 106, booster small plunger; 107, oil hole; 108, limiting boss; 109, limiting through hole; 110, first boss; 111, second boss; 112, third boss; 113, outer piston return spring; 114, inner piston return spring; 115, sealing ring; 116, limiting ring; 117, placing groove; 118, sealing block; 119, small diameter section; 120, large diameter section; 121, oil liquid through hole; 122, limiting table; 123, small plunger return spring; 201, armature; 202, magnet shell; 203, coil; 301, caliper; 302, oil way; 303, brake piston cylinder; 304, brake piston; 305, brake disc; 306, brake pad; 401 oil storage cavity shell DETAILED DESCRIPTION

[0026] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure of the present specification.

[0027] The following specific embodiments of the electromagnetic hydraulic braking structure will be described in detail to illustrate the advantages of the present application.

[0028] Example 1 Referring to the accompanying drawings Figure 1 In this embodiment, the electromagnetic hydraulic braking structure includes a combined piston assembly 100, an electromagnet assembly 200 and a hydraulic braking assembly 300.

[0029] Specifically, referring to the accompanying drawings Figure 2 The combined piston assembly 100 includes a piston cylinder 101, wherein the piston cylinder 101 has a first piston cavity 102 and a second piston cavity 103 in communication with each other, a combined outer piston 104 and a combined inner piston 105 are arranged in the first piston cavity 102, and a booster small piston 106 is arranged in the second piston cavity 103. The outer side wall of the combined outer piston 104 is in sliding fit with the inner side wall of the first piston cavity 102, and the combined inner piston 105 is arranged inside the combined inner piston 105 and in sliding fit with the combined outer piston 104. The outer side wall of the booster small piston 106 is in sliding fit with the inner side wall of the second piston cavity 103, the booster small piston 106 partially penetrates into the first piston cavity 102 from the second piston cavity 103, and this part is arranged in the combined outer piston 104, and in the movement of the combined inner piston 105, it can abut with the booster small piston 106 and push the booster small piston 106.

[0030] The outer part of the piston rod is provided with an oil storage cavity 400, wherein the hydraulic oil is arranged, which enters the first piston cavity 102 through a plurality of oil holes 107 on the outer side wall of the piston cylinder 101.

[0031] The electromagnet assembly 200 has an armature 201 abutting the combined inner piston 105, and by controlling the stroke and suction force of the armature 201, the formation of the combined inner piston 105 is controlled.

[0032] In this embodiment, the first piston cavity 102 is provided with a limiting boss 108, the limiting boss 108 is provided with a limiting through hole 109 and is communicated with the second piston cavity 103, and the booster small plunger 106 is arranged in the limiting through hole 109. The limiting boss 108 is arranged at the bottom of the first piston cavity 102 and is used for limiting the stroke of the combined outer piston 104; the limiting through hole 109 is provided, and the booster small plunger 106 partially passes through the limiting through hole 109 and enters the first piston cavity 102. At the same time, the limiting boss 108 is sleeved with the outer piston reset spring 113, and the outer piston reset spring 113 abuts against the combined outer piston 104. The limiting boss 108 also has a certain positioning effect on the outer piston reset spring 113, and the outer piston reset spring 113 is arranged between the bottom of the first piston cavity 102 and the combined outer piston 104. The space where the outer piston reset spring 113 is arranged is used for storing part of the hydraulic oil entering through the oil hole 107.

[0033] In this embodiment, the combined outer piston 104 is in a cylindrical shape and the end face is provided with a through hole, and the booster small plunger 106 is arranged in the through hole. One end of the combined outer piston 104 is open, and the other end is an end face provided with a through hole, and the booster small plunger 106 partially enters the chamber between the combined inner piston 105 and the combined outer piston 104 through the through hole. The inner diameter of the through hole needs to be slightly larger than the outer diameter of the booster small plunger 106 arranged in the through hole, and there is a certain gap between the through hole and the booster small plunger 106. The end face of the combined outer piston 104 and the bottom surface of the first piston cavity 102 form a chamber for storing part of the hydraulic oil, and the hydraulic oil in the chamber enters the gap between the combined inner piston 105 and the combined outer piston 104 through the gap between the through hole of the end face of the combined outer piston 104 and the booster small plunger 106.

[0034] The outer side of the combined outer piston 104 is provided with two sealing rings 115 and is in sliding cooperation with the inner side of the piston cylinder 101. The two sealing rings 115 are arranged on the outer side wall of the combined outer piston 104 and are spaced apart. In the initial outward movement of the combined outer piston 104, it is necessary to ensure that the positions of the two sealing rings 115 are above the oil hole 107, that is, the oil hole 107 is communicated with the oil storage chamber 400 and the first piston cavity 102, and the hydraulic oil can enter the chamber where the outer piston reset spring 113 is arranged. When the combined outer piston 104 has a certain stroke, the oil hole 107 is blocked by the sealing ring 115 close to the end face of the combined outer piston 104, and further enters the position between the two sealing rings 115. It should be noted that when the end face of the combined outer piston 104 reaches the limiting boss 108, the oil hole 107 needs to be between the two sealing rings 115 or be blocked by the sealing ring 115 close to the open end of the combined outer piston 104. In this process, the oil storage chamber 400 and the first piston cavity 102 are disconnected.

[0035] In the embodiment, the outer piston 104 is provided with a limiting ring 116, and the inner piston 105 is arranged in the outer piston 104 and is limited between the limiting ring 116 and the bottom of the outer piston 104. The inner piston reset spring 114 is arranged between the inner piston 105 and the outer piston 104, and the inner piston reset spring 114 abuts against the inner piston 105 and the outer piston 104. The limiting ring 116 is used to limit the formation of the inner piston 105, and the inner piston 105 moves between the limiting ring 116 and the bottom of the outer piston 104.

[0036] The inner piston 105 is provided with a boss structure, and includes a first boss 110, a second boss 111 and a third boss 112. The first boss 110 abuts against the armature 201. The outer diameter of the second boss 111 is smaller than the inner diameter of the limiting ring 116. The outer side of the third boss 112 is provided with a sealing ring 115 and is in sliding fit with the inner side of the outer piston 104.

[0037] Specifically, the outer diameters of the first boss 110, the second boss 111 and the third boss 112 increase in turn. The outer side wall of the third boss 112 is provided with a sealing ring 115 and is in sliding fit with the inner side wall of the inner piston 105. The sealing ring 115 prevents the hydraulic oil from leaking out. The outer diameter of the second boss 111 is smaller than the inner diameter of the limiting ring 116, so that the second boss 111 can pass through the limiting ring 116. The limiting ring 116 limits the third boss 112 between the end face of the third boss 112 and the outer piston 104, thereby limiting the stroke of the inner piston 105. The end face of the first boss 110 is used to abut against the armature 201.

[0038] The inner piston 105 is provided with a placing groove 117, the placing groove 117 is provided with the inner piston reset spring 114, and the placing groove 117 is provided with a sealing block 118. The bottom of the placing groove 117 is provided with the sealing block 118, which is used to abut against the end of the booster small plunger 106.

[0039] In the embodiment, the booster small plunger 106 includes a small diameter section 119 and a large diameter section 120. The booster small plunger 106 is provided with an oil through hole 121 arranged along an axis. The small diameter section 119 passes through the limiting through hole 109 and is arranged in the through hole of the outer piston 104. The large diameter section 120 is limited in the second piston cavity 103. A limiting table 122 is screwed in the second piston cavity 103. The limiting table 122 is provided with a through hole and communicates the second piston cavity 103 with the oil passage 302. The small plunger reset spring 123 is arranged between the limiting table 122 and the booster small plunger 106.

[0040] The large-diameter section 120 of the booster small plunger 106 is in sliding fit with the second piston cavity 103. The hole diameter of the limiting through hole 109 is smaller than the inner diameter of the second piston cavity 103, so that the small-diameter section 119 of the booster small plunger 106 can pass through the limiting through hole 109, and the large-diameter section 120 is limited in the second piston cavity 103. The second piston cavity 103 is screwed with a limiting platform 122 at the other end, so that the booster small plunger 106 is limited in the second piston cavity 103, and a small plunger return spring 123 is arranged between the booster small plunger 106 and the limiting platform 122. In the initial position of the booster small plunger 106, the large-diameter section 120 always abuts against the bottom of the second piston cavity 103 where the limiting through hole 109 is located. The booster small plunger 106 is provided with an oil liquid through hole 121 penetrating the axis thereof, so as to communicate the first piston cavity 102 with the second piston cavity 103. Specifically, the chamber between the combined inner piston 105 and the combined outer piston 104 is communicated with the second piston cavity 103. The limiting platform 122 is provided with a through hole, so as to communicate the second piston cavity 103 with the oil passage 302.

[0041] With reference to the accompanying drawings Figure 1 In the embodiment, the hydraulic brake assembly 300 comprises a caliper 301, the caliper 301 is provided with a pair of brake pistons 304 cylinders 303101, brake pistons 304 and brake discs 305, and brake pads 306 are arranged between the two brake discs 305; the oil passage 302 communicates the two brake pistons 304 cylinders 303101. The two brake pistons 304 cylinders 303101 of the caliper 301 are oppositely arranged, and the brake pistons 304 are arranged in the two brake pistons 304 cylinders 303101 respectively. The two brake pistons 304 are connected with the brake discs 305 respectively, and the brake pads 306 are arranged between the two brake discs 305. The two brake pistons 304 cylinders 303101 are communicated with the oil passage 302 respectively, and the brake effect of the two brake discs 305 on the brake pads 306 is controlled by the hydraulic oil in the oil passage 302.

[0042] In the embodiment, the electromagnet assembly 200 comprises a magnet shell 202 and a coil 203 arranged inside the magnet shell 202, and the armature 201 penetrates the magnet shell 202 and the coil 203. The magnet shell 202 is in butt joint with the first piston cavity 102, and the armature 201 abuts against the combined inner piston 105. The end of the armature 201 for abutting against the combined inner piston 105 is in the shape of a truncated cone, the main body of the armature 201 has a large outer diameter, and the inner side wall of the magnet shell 202 is in sliding fit with the main body of the armature 201. The end of the armature 201 away from the combined piston assembly 100 is provided with a conical surface, and the magnet shell 202 is provided with a structure for matching the two conical surfaces of the armature 201, so as to limit the stroke of the armature 201 and position the armature 201. The diameter of the end surface of the armature 201 abutting against the combined inner piston 105 is much smaller than the outer diameter of the main body of the armature 201, so that the armature 201 generates a large suction force on the combined inner piston 150.

[0043] The oil storage cavity 400 is formed by the oil storage cavity shell 401, the cylinder and the magnet shell 202. The electromagnetic magnet assembly 200, the combined piston assembly 100 and the oil storage cavity 400 are highly integrated, so that the overall volume of the electromagnetic hydraulic braking structure can be reduced.

[0044] The following specifically describes the motion state of the electromagnetic hydraulic braking structure in this embodiment.

[0045] Referring to the accompanying drawings Figure 3 In the drawings, the plane where the end face of the combined outer piston 104 is located is S1, the bottom face of the first piston cavity 102 is S2, and the plane where the limiting boss 108 is located is S3. The plane where the end face of the third boss 112 of the combined inner piston 105 is located is S4, the bottom face of the placement groove 117 is S5, and the bottom face inside the combined outer piston 104 is S6. The plane where the end face of the small-diameter section 119 of the booster small plunger 106 is located is S7, and the plane where the end face of the large-diameter section 120 is located is S8. The bottom face inside the limiting platform 122 is S9.

[0046] The chamber formed by S1, S2, S3, the side wall of the first piston cavity 102, the side wall of the limiting boss 108 and the side wall of the small-diameter section 119 of the booster small plunger 106 is V1. The chamber formed by S4, S5, S6, S7, the side wall of the placement groove 117, the inner side wall of the combined outer piston 104 and the outer side wall of the small-diameter section 119 of the booster small plunger 106 is V2. The sum of the chamber formed by S8, S9 and the inner side wall of the limiting platform 122 and the chamber formed by the oil liquid through hole 121 of the booster small plunger 106 is V3.

[0047] No braking state Referring to the accompanying drawings Figure 4 The open end of the combined outer piston 104 abuts against the magnet shell 202, the third boss 112 of the combined inner piston 105 abuts against the limiting ring 116, the second boss 111 abuts against the magnet shell 202, and the first boss 110 extends into the magnet shell 202 and abuts against the armature 201. The large-diameter section 120 of the booster small plunger 106 abuts against the bottom face of the first piston cavity 102, and the end of the small-diameter section 119 is a certain distance away from the bottom face of the placement cavity of the combined inner piston 105. The two sealing rings 115 of the outer side wall of the combined outer piston 104 are both located above the oil hole 107, the oil storage cavity 400 is in communication with V1 through the oil hole 107, V1 is in communication with V2 through the gap between the small-diameter section 119 of the booster small plunger 106 and the end face through hole of the combined outer piston 104, V2 is in communication with V3, and V3 is in communication with the oil passage 302. The hydraulic oil in the oil storage cavity 400 fills V1, V2 and V3, so that the three chambers are filled with hydraulic oil.

[0048] Braking state one Referring to the accompanying drawings Figure 5, the coil 203 of the electromagnet assembly 200 is energized to control the armature 201 to move downward, pushing the combined inner piston 105. In this state, the outer piston return spring 113 is compressed, and the inner piston return spring 114 remains unchanged. The combined inner piston 105 moves downward together with the combined outer piston 104. The oil hole 107 is blocked by the sealing ring 115 on the outer wall of the combined outer piston 104, or continues to move downward between the two sealing rings 115, and the oil storage cavity 400 is not connected to V1. V1 is compressed and the volume decreases. The hydraulic oil in V1 enters the oil circuit 302 through V2 and V3. The two brake discs 305 press the brake pads 306 to generate a braking effect.

[0049] In this state, the gap between the brake pads 306 and the brake discs 305 will fluctuate during vehicle operation, i.e. the position of the armature 201 is not convenient, and the gap between the brake pads 306 and the brake discs 305 fluctuates and changes. At this time, the hydraulic oil in the oil circuit 302 will return to V2 and V1 along V3. Since the position of the armature 201 remains unchanged, there is still a gap between the combined inner piston 105 and the booster small piston 106. The volume compensation mechanism between V2 and V1 makes the combined outer piston 104 overcome the spring force of the inner piston return spring 114 to float upward, so as to eliminate the influence of gap fluctuation on the position of the combined inner piston 105.

[0050] The armature 201 continues to move downward until the sealing block 118 of the combined inner piston 105 abuts against the small diameter section 119 of the booster small piston 106, and the braking state changes from state one to state two.

[0051] Braking state two Reference is made to the accompanying drawings Figure 6 The sealing block 118 of the combined inner piston 105 abuts against the end of the small diameter section 119 of the booster small piston 106, and the sealing block 118 blocks one end of the oil liquid through hole 121 of the booster small piston 106, so that V2 and V3 are disconnected. The armature 201 continues to move downward, pushing the combined inner piston 105 and the booster small piston 106 to move downward. The volume of V3 is compressed and reduced, and the hydraulic oil in V3 further enters the oil circuit 302, and the brake disc 305 further presses the brake pad 306. In this state, since V1 and V2 are connected, and V3 and the oil storage cavity 400 are disconnected, during the continuous downward movement of the combined inner piston 105, the hydraulic oil in V2 enters V1, the volume of V2 decreases, the volume of V1 increases, and the combined outer piston 104 rises.

[0052] In this state, since the cross-sectional area of the booster small piston 106 is small, and the total volume of V1 and V2 remains unchanged, the hydraulic oil in the oil circuit 302 is difficult to return to V3, preventing the combined inner piston 105 from being pushed in the opposite direction. The effect of controlling large pressure with small area is achieved, and the braking effect is stable.

[0053] The armature 201 continues to move downward until the third protrusion 112 end face of the combined inner piston 105 contacts the inner bottom surface of the combined outer piston 104, reaching the brake limit position, which is the same as the second brake state, and the brake effect is stable.

[0054] In each of the above brake states, the combined inner piston 105 and the combined outer piston 104 are respectively subjected to the elastic force of the inner piston return spring 114 and the outer piston return spring 113, and return to the non-braking state.

[0055] In this embodiment, through the cooperation of the combined piston assembly 100 and the electromagnet assembly 200, the electromagnetic hydraulic braking effect of the hydraulic brake assembly 300 is realized. When in the first brake state, the combined piston structure can cope with the gap fluctuation between the brake disc 305 and the brake pad 306, and will not affect the travel position of the armature 201. When in the second brake state, the total volume of V1 and V2 remains unchanged, and the booster small piston 106 realizes the effect of controlling large pressure with small area, and the brake effect is stable. The double-cavity linkage of the first piston cavity 102 and the second piston cavity 103 realizes multi-stage pressure amplification, and cooperates with the booster small piston to produce the effect of "controlling large pressure with small area".

[0056] Embodiment Two Referring to the accompanying Figure 7 and 8 , this embodiment applies the electromagnetic hydraulic braking structure of embodiment one, and proposes an electrically controlled electromagnetic hydraulic braking caliper 301, which includes an integrated combined piston assembly 100, an electromagnet, and a hydraulic brake assembly 300. The combined piston assembly 100 and the electromagnet assembly 200 are covered by an oil storage cavity housing 401, which is more compact and beautiful as a whole. The oil storage cavity housing 401 forms an oil storage cavity 400 inside and is in communication with the inside of the combined piston assembly 100, which is used to provide hydraulic oil. The combined piston assembly 100 and the hydraulic brake assembly 300 are connected to the oil circuit 302, which is used to provide hydraulic oil and control the hydraulic brake assembly 300. The electromagnet assembly 200 is connected to the MCU through the cable harness 500, which is used to realize the control and data acquisition of the electromagnet assembly 200, and improve the integration.

[0057] The MCU collects various data of the electromagnetic hydraulic braking structure in the actual braking process, which can be directly integrated and shared with ABS, ESP, and intelligent driving systems (such as AEB automatic emergency braking) without additional hardware.

[0058] Specifically, continuing to refer to the accompanying Figure 1 and 2The first piston cavity 102 is provided with a limiting boss 108, the limiting boss 108 is provided with a limiting through hole 109 and is communicated with the second piston cavity 103, and the booster small plunger 106 is arranged in the limiting through hole 109; the limiting boss 108 is sleeved with an outer piston return spring 113, and the outer piston return spring 113 abuts against the combined outer piston 104.

[0059] The combined outer piston 104 is in a cylindrical shape and is provided with a through hole in the end face, and the booster small plunger 106 is arranged in the through hole; the outer side of the combined outer piston 104 is provided with two sealing rings 115 and is in sliding cooperation with the inner side of the piston cylinder 101.

[0060] The inner side wall of the combined outer piston 104 is provided with a limiting ring 116, the combined inner piston 105 is arranged in the inside of the combined outer piston 104 and is limited between the limiting ring 116 and the bottom of the combined outer piston 104.

[0061] The combined inner piston 105 is provided with a boss structure and includes a first boss 110, a second boss 111 and a third boss 112, the first boss 110 abuts against the armature 201, the outer diameter of the second boss 111 is smaller than the inner diameter of the limiting ring 116, the outer side of the third boss 112 is provided with a sealing ring 115 and is in sliding cooperation with the inner side of the combined outer piston 104; the combined inner piston 105 is provided with a placing groove 117, the placing groove 117 is provided with an inner piston return spring 114, and the placing groove 117 is provided with a sealing block 118.

[0062] The booster small plunger 106 includes a small diameter section 119 and a large diameter section 120, the booster small plunger 106 is provided with an oil liquid through hole 121 arranged along the axis, the small diameter section 119 passes through the limiting through hole 109 and is arranged in the through hole of the combined outer plunger, and the large diameter section 120 is limited in the second piston cavity 103; the second piston cavity 103 is screwed with a limiting table 122 inside, the limiting table 122 is provided with a through hole and is communicated with the second piston cavity 103 and the oil way 302; the limiting table 122 and the booster small plunger 106 are provided with a small plunger return spring 123.

[0063] The hydraulic brake assembly 300 includes a caliper 301, the caliper 301 is provided with a pair of brake pistons 304 cylinders 303101, brake pistons 304 and brake discs 305, the brake pads 306 are arranged between the two brake discs 305; the oil way 302 is communicated with the two brake pistons 304 cylinders 303101.

[0064] The electromagnet assembly 200 includes a magnet shell 202 and a coil 203 arranged inside, the armature 201 is arranged in the magnet shell 202 and the coil 203, the magnet shell 202 is butted with the first piston cavity 102, and the armature 201 abuts against the combined inner piston 105.

[0065] The oil storage cavity 400 is formed by surrounding the piston cylinder 101 and the magnet shell 202 with an oil storage cavity shell 401.

[0066] The above are preferred embodiments of the present application, used to explain the specific structure and functions of the present application, it should be pointed out that, without departing from the principles of the present application, the ordinary skilled in the art can make the expected improvements and modifications to the present application, these improvements and modifications are also within the scope of protection of the present application.

Claims

1. An electromagnetic hydraulic braking structure, characterized in that, include: A combined piston assembly includes a piston cylinder, the piston cylinder having a first piston chamber and a second piston chamber that are interconnected, the first piston chamber having a combined outer piston and a combined inner piston passing through it, and the second piston chamber having a pressure-boosting small plunger passing through it; the piston cylinder has an oil storage chamber on its exterior, and its sidewall has a plurality of oil holes that connect the first piston chamber and the oil storage chamber. An electromagnet assembly, including an armature, the armature abutting against a piston within the assembly; The hydraulic braking assembly has an internal oil passage that connects to the second piston chamber.

2. The electromagnetic hydraulic braking structure according to claim 1, characterized in that, The first piston chamber is provided with a limiting boss, the limiting boss has a limiting through hole and communicates with the second piston chamber, and the pressurizing small plunger passes through the limiting through hole; the limiting boss is fitted with an outer piston return spring, and the outer piston return spring abuts against the combined outer piston.

3. The electromagnetic hydraulic braking structure according to claim 2, characterized in that, The combined outer piston is cylindrical and has a through hole on its end face, through which the pressure boosting plunger passes; the outer side of the combined outer piston is provided with two sealing rings, which slide in cooperation with the inner side of the piston cylinder.

4. The electromagnetic hydraulic braking structure according to claim 3, characterized in that, The inner wall of the combined outer piston is provided with a limiting ring, and the combined inner piston passes through the interior of the combined outer piston and is limited between the limiting ring and the bottom of the combined outer piston.

5. The electromagnetic hydraulic braking structure according to claim 4, characterized in that, The combined inner piston has a boss structure, including a first boss, a second boss and a third boss. The first boss abuts against the armature. The outer diameter of the second boss is smaller than the inner diameter of the limiting ring. The outer side of the third boss is provided with a sealing ring and slides with the inner side of the combined outer piston. The combined inner piston has a placement groove, which is provided with an inner piston return spring and a sealing block.

6. The electromagnetic hydraulic braking structure according to claim 5, characterized in that, The booster plunger includes a small-diameter section and a large-diameter section. The booster plunger has an oil through-hole that runs through the axis. The small-diameter section passes through the limiting through-hole and is inserted into the through-hole of the combined outer plunger. The large-diameter section is confined within the second piston chamber. A limiting platform is screwed into the second piston chamber. The limiting platform has a through-hole that connects the second piston chamber to the oil passage. A plunger return spring is provided between the limiting platform and the booster plunger.

7. An electromagnetic hydraulic braking structure according to any one of claims 1 to 5, characterized in that, The hydraulic braking assembly includes a caliper, which has a pair of brake piston cylinders, brake pistons and brake discs, with a brake pad between the two brake discs; the oil circuit connects the two brake piston cylinders.

8. An electromagnetic hydraulic braking structure according to any one of claims 1 to 5, characterized in that, The electromagnet includes a magnet housing and a coil coiled inside. The armature passes through the magnet housing and the coil. The magnet housing is connected to the first piston chamber, and the armature abuts against the combined inner piston.

9. The electromagnetic hydraulic braking structure according to claim 7, characterized in that, The oil storage chamber is formed by the oil storage chamber shell surrounding the piston cylinder and the magnet shell.

10. An electro-hydraulic brake caliper, comprising the electro-hydraulic brake structure according to any one of claims 1 to 9, characterized in that, It includes an electronic control unit, which is connected to the electromagnet via a cable harness.

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