Hydraulic electronic brake hand brake

Abstract

The application discloses a hydraulic electronic brake hand brake, which comprises a first shell, a second shell connected with the first shell, a piston assembly and a motor connected with the piston assembly; the left end surface of the first shell is provided with an oil outlet for connecting a brake caliper oil circuit system; the right end surface of the first shell is connected with the left end surface of the second shell; the right end surface of the second shell is provided with a motor interface; the inner wall of the first shell and the inner wall of the second shell form a working cavity; the side wall of the first shell is provided with an oil inlet for connecting an automobile oil pipe and an oil inlet groove connected with the oil inlet; the piston assembly is sleeved in the working cavity, and the outer edge of the baffle of the piston assembly is attached to the inner wall of the working cavity; and the push rod of the piston assembly penetrates through the motor interface and is connected with the motor. The above structure is adopted, the electronic hand brake caliper and the brake caliper are designed as a whole, the hydraulic electronic brake hand brake is applicable to medium and large wheel hub vehicles, installation space is saved for brake upgrading, and manufacturing cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of brake calipers of automobile brake systems, and in particular to a hydraulic electronic handbrake. Background Art

[0002] With the development of the automotive industry, consumers are increasingly demanding higher safety performance from their vehicles. Brake calipers, as a crucial safety feature, are particularly crucial. Brake calipers are components that generate braking torque, a force that impedes the vehicle's motion or tendency to move. Currently, friction brake calipers are widely used in automobiles, generating braking torque through friction between the working surfaces of a fixed element and a rotating element.

[0003] In the prior art, if a vehicle with an electronic parking brake on the rear wheels wants to improve its braking performance, it needs to have dual calipers to achieve braking and parking: one caliper uses hydraulics to achieve normal braking, and the other caliper uses an electric motor to achieve parking. The principle of achieving normal braking through hydraulics is as follows: the brake caliper's oil system is connected to the vehicle's brake oil pipe. The brake fluid in the oil system pushes the brake caliper's piston, which pushes the friction plate. At the same time, the two friction plates arranged opposite each other move toward each other, and the two friction plates cooperate to clamp the brake disc to achieve the braking effect; conversely, the two friction plates move away from each other, causing the two friction plates to release the brake disc. Parking with a motor generally uses a motor to mechanically connect the friction plates, driving the two friction plates toward or away from each other. The above dual caliper structure takes up installation space and is relatively expensive. Summary of the Invention

[0004] The purpose of the present invention is to disclose a hydraulic electronic brake handbrake, which solves the problem of large installation space and high cost in the prior art of using double calipers to realize electronic brake and hydraulic brake.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A hydraulic electronic brake handbrake comprises a first housing, a second housing connected to the first housing, a piston assembly and a motor connected to the piston assembly; the left end face of the first housing is provided with an oil outlet for connecting to the brake caliper oil system, the right end face of the first housing is connected to the left end face of the second housing, and the right end face of the second housing is provided with a motor interface; the inner wall of the first housing and the inner wall of the second housing form a working chamber; the side wall of the first housing is provided with an oil inlet for connecting to an automobile oil pipe and an oil inlet groove connected to the oil inlet; the piston assembly is sleeved in the working chamber, and the outer edge of the baffle of the piston assembly is attached to the inner wall of the working chamber; the push rod of the piston assembly passes through the motor interface and is connected to the motor.

[0007] Further, the inner wall of the first shell forms a first cavity, and the inner wall of the second shell forms a second cavity; the first cavity and the second cavity are coaxially matched and constitute the working cavity; and the oil outlet is communicated with the first cavity.

[0008] Further, the piston assembly is coaxially matched with the working cavity.

[0009] Further, the oil inlet is arranged at a position close to the right end of the first shell and penetrates the side wall of the first shell; and the oil inlet groove is arranged on the inner wall of the first shell and is close to the right end of the first shell.

[0010] Further, the longitudinal section of the first cavity is circular, the axis of the oil inlet is arranged along the radial direction of the first cavity, and the oil inlet groove is arranged along the axial direction of the first cavity.

[0011] Further, the right end of the first shell is provided with a first connecting seat, the left end of the second shell is provided with a second connecting seat, and the connecting member penetrates the first connecting seat and the second connecting seat to connect the right end of the first shell with the left end of the second shell.

[0012] Further, the piston assembly comprises a push rod and a piston connected with the push rod; the push rod comprises an externally threaded portion provided with external threads, a chuck portion connected with the externally threaded portion, and a push rod connecting portion connected with the chuck portion; the left end of the externally threaded portion is connected with the chuck portion, the chuck portion is attached to the inner wall of the right end surface of the second shell, the push rod connecting portion is connected with the motor after penetrating the motor interface, and the right end of the externally threaded portion is inserted into the piston.

[0013] Further, the piston assembly further comprises a limiting block; the piston comprises a baffle and a piston connecting portion provided with a piston inner cavity; the longitudinal section of the baffle is circular structure, the shape of the baffle is matched with the shape of the working cavity, and the outer edge of the baffle is attached to the inner wall of the working cavity; the longitudinal section of the piston connecting portion is square structure; the limiting block is sleeved on the outer wall of the piston connecting portion; the right end of the baffle is connected with the left end of the piston connecting portion, the piston inner cavity is coaxially matched with the piston connecting portion, and the piston inner cavity is provided with internal threads; the piston inner cavity is open at the right end of the piston connecting portion; the push rod connecting portion is inserted into the piston inner cavity from the right end of the piston connecting portion, the push rod connecting portion and the piston inner cavity are movably threadedly connected through external threads and internal threads; the longitudinal section of the limiting block is circular, a square limiting hole is arranged at the central position of the limiting block, the piston connecting portion penetrates the limiting hole, and the outer edge of the limiting block is attached to the inner wall of the second shell and is located at a position close to the left end of the second shell.

[0014] Further, the first sealing ring for sealing is arranged between the outer edge of the baffle and the working cavity.

[0015] Further, a one-way valve assembly is further included; the piston is provided with at least one first through hole; the one-way valve assembly includes a valve body, a pressing sheet, a second sealing ring and a spring, the spring is sleeved on the valve body, the right end of the valve body is connected with the left end surface of the baffle through the pressing sheet and the second sealing ring, and the second sealing ring covers the first through hole; the valve body is connected with the piston, the left end of the spring abuts against the flange of the valve body, and the right end of the spring abuts against the pressing sheet.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The present application adopts the structure of cooperation of a working cavity, a motor and a piston assembly, realizes reciprocating displacement of the motor driving the piston assembly in the working cavity, adopts the design of motor control oil way, uses the one-way valve design in the internal structure, realizes normal braking, normal parking and other functions of the vehicle, and is suitable for rear wheel brake assemblies of various medium and large-sized vehicles. When used, the embodiment and the brake caliper are connected in series, the brake oil input into the brake caliper first passes through the embodiment, the output of the whole oil way is controlled by the embodiment, so that the braking and parking of the vehicle are controlled.

[0018] The present application is a split type structure completed through various processes such as aluminum alloy forging and CNC machining, and is connected by bolts. Compared with the prior art, the present application can be suitable for medium and large-sized hubs, and is suitable for rear wheel brake assemblies of more vehicle models; the electronic hydraulic brake hand brake is of a split type single piston structure, is simple in structure and convenient to install. The present application is a hydraulic electronic brake hand brake which integrates automobile hydraulic braking and electronic motor caliper parking, and is mainly used in vehicles with electronic hand brakes at the rear wheels; the present application adopts a motor control oil way system, and can be used in medium and large-sized vehicles with a hub of 17 inches or above. The present application has the characteristics of low manufacturing cost, simple installation, diversified functions and the like. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 is a hydraulic electronic brake hand brake of the present application, a perspective schematic view of the embodiment;

[0021] Figure 2 is Figure 1 an exploded schematic view of the embodiment;

[0022] Figure 3 is Figure 1 a front view schematic view of the embodiment;

[0023] Figure 4 is Figure 3 Schematic diagram of the cross section along the AA direction;

[0024] Figure 5 yes Figure 2 A schematic front cross-sectional view of the first shell;

[0025] Figure 6 yes Figure 2 A schematic front cross-sectional view of the second shell;

[0026] Figure 7 yes Figure 2 Explosion diagram of the piston assembly;

[0027] Figure 8 yes Figure 7 A schematic cross-sectional elevation view of

[0028] Figure 9 yes Figure 7 A schematic front view of the middle piston;

[0029] Figure 10 yes Figure 9 Schematic diagram of the right side;

[0030] Figure 11 yes Figure 7 A front view of the middle limit block;

[0031] Figure 12 yes Figure 11 Schematic diagram of the right side;

[0032] Figure 13 yes Figure 2 Exploded diagram of the one-way valve assembly;

[0033] Figure 14 yes Figure 13 A schematic cross-sectional elevation view of

[0034] In the figure, 1. first shell; 11. oil outlet; 12. first cavity; 13. oil inlet; 14. oil inlet groove; 15. first connecting seat; 2. second shell; 21. motor interface; 22. second cavity; 23. second connecting seat; 3. piston assembly; 31. push rod; 311. external threaded portion; 312. chuck portion; 313. push rod connecting portion; 32. piston; 321. baffle; 322. piston connecting portion; 323. piston inner cavity; 324. first through hole; 33. limit block; 331. limit hole; 332. limit tenon; 4. one-way valve assembly; 41. valve body; 411. flange; 42. pressing plate; 43. second sealing ring; 44. spring; 5. motor; 6. first sealing ring. DETAILED DESCRIPTION

[0035] In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0036] In the present invention, unless otherwise expressly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. The terms "vertical," "horizontal," "left," "right," "above," "below," and similar expressions are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] like Figures 1 to 14 The embodiment shows a hydraulic electronic handbrake, comprising a first housing 1, a second housing 2 connected to the first housing, a piston assembly 3 and a one-way valve assembly 4. The left end face of the first housing 1 is provided with an oil outlet 11 for connecting to the brake caliper oil system, the right end face of the first housing 1 is connected to the left end face of the second housing 2, and the right end face of the second housing 2 is provided with a motor interface 21 for connecting to the motor 5. The inner wall of the first housing 1 forms a first cavity 12, and the inner wall of the second housing 2 forms a second cavity 22. The first cavity 12 and the second cavity 22 are coaxially matched and constitute the working cavity of this embodiment. The oil outlet 11 is connected to the first cavity 12. The piston assembly 3 is sleeved in the working cavity and the piston assembly and the working cavity are coaxially matched. The one-way valve assembly 4 is sleeved in the working cavity and connected to the piston assembly 3.

[0039] The side wall of the first shell 1 is provided with an oil inlet 13 for connecting an oil pipe and an oil inlet groove 14 connected with the oil inlet 13. The oil inlet 13 is arranged near the right end of the first shell 1 and penetrates the side wall of the first shell 1. The oil inlet groove 14 is arranged on the inner wall of the first shell 1 and near the right end of the first shell 1. The longitudinal section of the first cavity 12 is circular, the axis of the oil inlet 13 is arranged along the radial direction R of the first cavity 12, and the oil inlet groove 14 is arranged along the axial direction L of the first cavity 12. The right end of the first shell 1 is provided with a first connecting seat 15, and the left end of the second shell 2 is provided with a second connecting seat 23. A connecting member (not shown) passes through the first connecting seat 15 and the second connecting seat 23 to connect the right end of the first shell 1 with the left end of the second shell 2.

[0040] The piston assembly 3 includes a push rod 31, a piston 32 connected with the push rod 31, and a limiting block 33. The push rod 31 includes an outer threaded part 311 provided with an outer thread, a chuck part 312 connected with the outer threaded part, and a push rod connecting part 313 connected with the chuck part 312. The left end of the outer threaded part 311 is connected with the chuck part 312, the chuck part 312 is attached to the inner wall of the right end surface of the second shell 2, and the push rod connecting part 313 is connected with the motor 5 after penetrating the motor interface 21. The right end of the outer threaded part 311 is inserted into the piston 32.

[0041] The piston 32 includes a baffle 321 and a piston connection portion 322 having a piston inner cavity 323. The baffle 321 has a circular longitudinal cross-section, and its shape matches that of the working cavity. The outer edge of the baffle 321 is attached to the inner wall of the working cavity. A first sealing ring 6 is further sandwiched between the outer edge of the baffle 321 and the working cavity for sealing. The piston connection portion 322 has a square longitudinal cross-section, and the stopper 33 is sleeved onto the outer wall of the piston connection portion 322. The right end of the baffle 321 is connected to the left end of the piston connection portion 322. The piston inner cavity 323 and the piston connection portion 322 are coaxially matched and have internal threads. The piston inner cavity 323 opens at the right end of the piston connection portion 322. The push rod connection portion 313 is inserted into the piston cavity 323 from the right end of the piston connection portion 322. The push rod connection portion 313 and the piston cavity 323 are connected by external and internal threads, thereby achieving a movable threaded connection between the push rod 31 and the piston 32. The piston 32 is provided with eight first through-holes 324, which are arranged around the center of the piston 32. The stop block 33 has a circular longitudinal cross-section, with a square stop hole 331 located at its center. The outer edge of the piston connection portion 322 is square in shape, and the piston connection portion 322 passes through and engages with the stop hole 331. The outer edge of the stop block 33 is attached to the inner wall of the second housing 2 and is located near the left end of the second housing 2. The outer edge of the stop block 33 is provided with a stop tenon 332, and the inner wall of the second housing 2 is provided with a stop groove that engages with the stop tenon 332. The limiting tenon 332 extends along the axis of the limiting block 33. The following describes the operation of the piston assembly 3: If the motor 5 drives the push rod 31 to rotate forward, the piston 32, which is connected to the push rod's movable thread, is driven by the push rod to move leftward. If the motor 5 drives the push rod 31 to rotate backward, the piston 32, which is connected to the push rod's movable thread, is driven by the push rod to move rightward.

[0042] The one-way valve assembly 4 includes a valve body 41, a pressure plate 42, a second sealing ring 43, and a spring 44. The spring 44 is sleeved onto the valve body 41. The right end of the valve body 41 is connected to the left end surface of the baffle 321 via the pressure plate 42 and the second sealing ring 43. The second sealing ring 43 covers the first through-hole 324. The valve body 41 is connected to the piston 32. The left end of the spring 44 abuts against the flange 411 of the valve body 41, and the right end of the spring 44 abuts against the pressure plate 42.

[0043] As a further improvement to the present invention, the first sealing ring 6 and the second sealing ring 43 are made of rubber or high-density microporous polyurethane foam. High-density microporous polyurethane foam is suitable for most frame sealing, module protection, and hardware support applications. It not only has excellent compressibility, slow rebound, and moisture and chemical resistance, but also has excellent rebound performance, can withstand high force and long-term compression, and provides excellent cushioning, sealing, filling, and shockproofing.

[0044] This embodiment is a split-body structure, completed through multiple processes including aluminum alloy forging and CNC machining, and is connected using bolts. This embodiment utilizes a motor-controlled oil circuit design and internally employs a one-way valve design to achieve normal vehicle braking and parking functions. It is suitable for rear-wheel brake assemblies of medium and large vehicles. When in use, this embodiment is connected in series with the brake caliper. Brake fluid entering the caliper first passes through this embodiment, which then controls the output of the entire oil circuit, thereby controlling the vehicle's braking and parking.

[0045] As a further explanation of this embodiment, its working principle is now explained: the oil inlet 13 is connected to the automobile oil pipe, and the oil outlet 11 is connected to the brake caliper; the motor 5 does not work during normal driving braking, and when the brake is stepped on, the brake oil enters the brake caliper through the oil inlet 13-oil inlet groove 14-first cavity 12-oil outlet 11-, thereby driving the friction plate of the brake caliper to work and produce a braking effect; the push rod connecting part 313 of this embodiment passes through the motor interface 21 and is connected to the motor 5, and the push rod 31 and the piston 32 are engaged with each other through screw threads (i.e., external threads and internal threads); the piston connecting part 322 adopts a square design and is engaged with the limit block 33, so that the piston 32 can only move in the horizontal direction and cannot rotate. When the parking function is used, the motor 5 works, driving the push rod 31 to rotate forward, causing the piston 32 to be forced forward (i.e., the baffle is displaced to the left). When the first sealing ring 6 reaches the end of the oil inlet groove 14, the baffle pushes the brake oil in the first cavity 12 into the brake caliper through the oil outlet 11, producing a parking effect, and the motor stops working; when the handbrake is released, the motor 5 works, driving the push rod 31 to reverse, and the push rod 31 pulls the piston 32 back (i.e., the baffle 321 is displaced to the right). The brake oil in the second cavity 22 enters the first cavity 12 through the one-way valve assembly 4, and the first sealing ring 6 passes through the oil inlet groove 14 to the right, and the brake oil in the brake caliper flows back, thereby producing the effect of releasing the handbrake, and the motor stops working.

[0046] Compared with the existing technology, this embodiment can be adapted to medium and large wheel hubs and is suitable for rear wheel brake assemblies of more vehicle models; the electronic hydraulic brake handbrake has a split single-piston structure with a simple structure and easy installation.

[0047] For other structures of this embodiment, refer to the prior art.

[0048] As a further illustration of the present invention, the embodiments and technical features of the embodiments may be combined with each other unless they conflict. The present invention is not limited to the above-described embodiments. The present invention is intended to encompass any modifications or variations that do not depart from the spirit and scope of the present invention and fall within the scope of the claims and equivalents of the present invention.

Claims

1. A hydraulic electronic handbrake, characterized by: The invention comprises a first housing (1), a second housing (2) connected to the first housing, a piston assembly (3) and a motor (5) connected to the piston assembly; the left end face of the first housing is provided with an oil outlet (11) for connecting to the brake caliper oil system, the right end face of the first housing is connected to the left end face of the second housing, and the right end face of the second housing is provided with a motor interface (21); the inner wall of the first housing and the inner wall of the second housing form a working chamber; the side wall of the first housing is provided with an oil inlet (13) for connecting to an automobile oil pipe and an oil inlet groove (14) connected to the oil inlet; the piston assembly (3) is sleeved in the working chamber, and the outer edge of the baffle (321) of the piston assembly is attached to the inner wall of the working chamber; the push rod (31) of the piston assembly passes through the motor interface and is connected to the motor; The piston assembly (3) includes a push rod (31) and a piston (32) connected to the push rod, the push rod including an external threaded portion (311) provided with an external thread, a chuck portion (312) connected to the external threaded portion, and a push rod connecting portion (313) connected to the chuck portion; the left end of the external threaded portion is connected to the chuck portion, the chuck portion is attached to the inner wall of the right end surface of the second housing (2), the push rod connecting portion passes through the motor interface (21) and is connected to the motor (5); the right end of the external threaded portion is inserted into the piston; The piston assembly (3) further comprises a stopper (33); the piston (32) comprises a baffle (321) and a piston connecting portion (322) provided with a piston inner cavity (323); the longitudinal section of the baffle is a circular structure, and the shape of the baffle and the shape of the working cavity are matched with each other, and the outer edge of the baffle is attached to the inner wall of the working cavity; the longitudinal section of the piston connecting portion is a square structure; the stopper is sleeved on the outer wall of the piston connecting portion; the right end of the baffle is connected to the left end of the piston connecting portion, and the piston inner cavity and the piston connecting portion are aligned. The shaft is matched and the piston cavity is provided with an internal thread; the piston cavity is open at the right end of the piston connecting part; the push rod connecting part (313) is inserted into the piston cavity from the right end of the piston connecting part, and the push rod connecting part and the piston cavity are connected by a movable thread through an external thread and an internal thread; the longitudinal section of the limit block is circular, and a square limit hole (331) is provided at the center of the limit block, and the piston connecting part passes through the limit hole; the outer edge of the limit block is attached to the inner wall of the second shell (2) and is located near the left end of the second shell; It also includes a one-way valve assembly; the piston (32) is provided with at least one first through hole (324); the one-way valve assembly includes a valve body (41), a pressing plate (42), a second sealing ring (43) and a spring (44), the spring is sleeved on the valve body, the right end of the valve body is connected to the left end face of the baffle (321) through the pressing plate and the second sealing ring, and the second sealing ring covers the first through hole; the valve body is connected to the piston, the left end of the spring abuts against the flange (411) of the valve body, and the right end of the spring abuts against the pressing plate.

2. The hydraulic electronic handbrake according to claim 1, characterized in that: The inner wall of the first shell (1) forms a first cavity (12), and the inner wall of the second shell (2) forms a second cavity (22); the first cavity and the second cavity are coaxially matched and constitute the working cavity; the oil outlet (11) is connected to the first cavity.

3. The hydraulic electronic handbrake according to claim 1, characterized in that: The piston assembly and the working chamber are coaxially matched.

4. The hydraulic electronic handbrake according to claim 2, characterized in that: The oil inlet (13) is located near the right end of the first housing (1) and penetrates the side wall of the first housing; the oil inlet groove (14) is located on the inner wall of the first housing and near the right end of the first housing.

5. The hydraulic electronic handbrake according to claim 2, characterized in that: The longitudinal section of the first cavity (12) is circular, the axis of the oil inlet (13) is arranged along the radial direction of the first cavity, and the oil inlet groove (14) is arranged along the axial direction of the first cavity.

6. The hydraulic electronic handbrake according to claim 5, characterized in that: The right end outer wall of the first shell (1) is provided with a first connecting seat (15), the left end outer wall of the second shell (2) is provided with a second connecting seat (23), and the connecting piece passes through the first connecting seat and the second connecting seat to connect the right end of the first shell to the left end of the second shell.

7. The hydraulic electronic handbrake according to claim 1, characterized in that: A first sealing ring (6) for sealing is sandwiched between the outer edge of the baffle (321) and the working chamber.

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