阅读说明：本技术 推动z形拉臂实现驻车功能的电子驻车鼓式制动器总成 (Electronic parking drum brake assembly for pushing Z-shaped pull arm to achieve parking function ) 是由 王变变 凌利峰 黄伟杰 汪永胜 黄建凌 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种推动Z形拉臂实现驻车功能的电子驻车鼓式制动器总成。Z型驻车拉臂顶端铰接于制动蹄筋朝向制动底板的侧面,制动底板上设有一个长条形通槽,Z型驻车拉臂下部折弯后穿过制动底板长条形通槽水平伸到制动底板的背面,Z型驻车拉臂在水平穿过到制动底板的背面后的末端朝下弯折与螺杆连接；齿轮箱壳体固定安装于安装支架,电机经齿轮箱壳体内部的齿轮传动结构和螺杆连接传动,带动螺杆做轴向移动；螺杆伸出于齿轮箱壳体中的端部和Z型驻车拉臂尾部穿制动底板后的侧边部朝下弯折的末端部铰接。本发明能够通过推动Z形驻车拉臂完成车辆电子驻车,同时在行车制动失效的情况下,进行紧急制动操作,具有防抱死功能。(The invention discloses an electronic parking drum brake assembly for pushing a Z-shaped pull arm to achieve a parking function. The top end of the Z-shaped parking pull arm is hinged to the side face, facing the brake bottom plate, of the brake shoe rib, a long strip-shaped through groove is formed in the brake bottom plate, the lower portion of the Z-shaped parking pull arm penetrates through the long strip-shaped through groove of the brake bottom plate after being bent and horizontally extends to the back face of the brake bottom plate, and the tail end of the Z-shaped parking pull arm after horizontally penetrating through the back face of the brake bottom plate is bent downwards and connected with; the gearbox shell is fixedly arranged on the mounting bracket, and the motor is connected and driven with the screw rod through a gear transmission structure in the gearbox shell to drive the screw rod to axially move; the end part of the screw rod extending out of the gearbox shell is hinged with the tail end part of the Z-shaped parking pull arm, which is bent downwards after the tail part of the Z-shaped parking pull arm penetrates through the braking bottom plate. The invention can complete the electronic parking of the vehicle by pushing the Z-shaped parking pull arm, and simultaneously carry out emergency braking operation under the condition of failure of driving braking, thereby having an anti-lock function.)

1. The utility model provides a promote electron parking drum brake assembly that Z shape single arm-drag realized parking function, includes leading hoof assembly (1.9), follows hoof assembly and brake shoe (1.2), follows the hoof assembly and includes brake tendon (1.1.4), and brake tendon (1.1.4) middle part articulates in brake shoe (1.2), its characterized in that: the brake device also comprises a drum brake braking device (1) and a power executing device (2); the drum brake braking device (1) comprises a Z-shaped parking pull arm (1.1.1) and a mounting bracket (1.3), the top end of one side edge of the Z-shaped parking pull arm (1.1.1) is hinged to the side face, facing the brake bottom plate (1.2), of a brake shoe rib (1.1.4), a long strip-shaped through groove is formed in the brake bottom plate (1.2), the other side edge of the Z-shaped parking pull arm (1.1.1) penetrates through the long strip-shaped through groove of the brake bottom plate (1.2) after being bent by 90 degrees at the lower part and horizontally extends to the back face of the brake bottom plate (1.2), the tail end of the Z-shaped parking pull arm (1.1.1) after horizontally penetrating to the back face of the brake bottom plate (1.2) is bent by 90 degrees downwards and connected with a screw rod (2.2), and the mounting bracket (1.3) is welded to the; the power execution device (2) comprises a gear box shell (2.1), a motor shell (2.3) and a screw (2.2), the gear box shell (2.1) is fixedly installed on an installation support (1.3) through an inner hexagonal cylindrical head bolt (1.4), the motor shell (2.3) is installed on the gear box shell (2.1), a motor in the motor shell (2.3) is connected and driven through a gear transmission structure in the gear box shell (2.1) and the screw (2.2) to drive the screw (2.2) to axially move, and the screw (2.2) is parallel to the strip-shaped through groove; the end part of the screw rod (2.2) extending out of the gearbox shell (2.1) is hinged with the tail end part of the Z-shaped parking pull arm (1.1.1) with the side edge part bent downwards by 90 degrees after the brake bottom plate (1.2) penetrates through the tail part of the Z-shaped parking pull arm.

2. The electronic parking drum brake assembly for pushing the Z-shaped pull arm to realize the parking function as claimed in claim 1, wherein: the top end of one side edge part of the Z-shaped parking pull arm (1.1.1) is hinged with a brake shoe rib (1.1.4) through a pull arm pin (1.1.3).

3. The electronic parking drum brake assembly for pushing the Z-shaped pull arm to realize the parking function as claimed in claim 1, wherein: the end part of the screw rod (2.2) is hinged through the end part of the pin shaft (1.6) and the Z-shaped parking pull arm (1.1.1) which penetrates through the brake bottom plate (1.2) and the side part of the screw rod is bent downwards by 90 degrees.

4. The electronic parking drum brake assembly for pushing the Z-shaped pull arm to realize the parking function as claimed in claim 1, wherein: the end part of the screw rod (2.2) is provided with a pin hole for installing a pin shaft (1.6).

5. The electronic parking drum brake assembly for pushing the Z-shaped pull arm to realize the parking function as claimed in claim 1, wherein: the back of the brake bottom plate (1.2) above the mounting bracket (1.3) is provided with a plastic bracket (1.5), and the plastic bracket (1.5) is supported and mounted on the motor shell (2.3).

6. The electronic parking drum brake assembly for pushing the Z-shaped pull arm to realize the parking function as claimed in claim 1, wherein: the utility model discloses a brake bottom plate (1.2) is including Z type parking single arm-drag (1.1.1) pass the side portion behind the back of brake bottom plate (1.2) as first portion of bending (B), the side of first portion of bending (B) still is equipped with two protruding structures A, the portion of bending (B) overcoat between two protruding structures A is equipped with single arm-drag guard shield (1.8), single arm-drag guard shield (1.8) inner circle suit is in first portion of bending (B), the rectangular shape logical groove of brake bottom plate (1.2) is adorned to the outer lane suit.

7. The electronic parking drum brake assembly for pushing the Z-shaped pull arm to achieve the parking function as claimed in claim 6, wherein: the pull arm shield (1.8) is made of rubber.

Technical Field

the invention relates to an automobile brake control technology, in particular to an electronic parking drum brake assembly for pushing a Z-shaped pull arm to achieve a parking function.

Background

Electronic parking of automobiles is widely applied to various automobile types and gradually becomes standard matching. The actuators are generally divided into two types: double guy cable and integrated. In the current industry, a double-cable electronic parking assembly acts on a caliper assembly and a drum brake assembly, and an integrated electronic parking assembly basically acts on the caliper assembly. For the vehicle type with large full load and weight, drum brakes are required to be arranged more, the current electric vehicle with new energy is a trend, the electric vehicle is provided with the drum brakes which are common in design, the integrated electronic parking assembly acts on the drum brakes which are a trend, the drum brakes for the conventional integrated electronic parking are required to drive pull arms by pulling pull wires, so that the electronic parking is realized, and the pull wires are connected with certain efficiency loss.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides an electronic parking drum brake assembly for pushing a Z-shaped pull arm to realize a parking function, which can be applied to all vehicle types and can complete electronic parking of vehicles. Meanwhile, under the condition that service braking fails, emergency braking operation is carried out, and an anti-lock function is also achieved.

In order to solve the technical problems, the invention adopts the following technical scheme:

the brake shoe comprises a leading shoe assembly, a trailing shoe assembly and a brake bottom plate, wherein the trailing shoe assembly comprises a brake tendon, the middle part of the brake tendon is hinged to the brake bottom plate, and the brake shoe further comprises a drum brake braking device and a power execution device; the drum brake braking device comprises a Z-shaped parking pull arm and a mounting support, wherein the top end of one side edge part of the Z-shaped parking pull arm is hinged to the side surface, facing a brake bottom plate, of a brake shoe rib, a long strip-shaped through groove is formed in the brake bottom plate, the other side edge part of the Z-shaped parking pull arm penetrates through the long strip-shaped through groove of the brake bottom plate after being bent by 90 degrees at the lower part and horizontally extends to the back surface of the brake bottom plate, the tail end of the Z-shaped parking pull arm after horizontally penetrating through the back surface of the brake bottom plate is bent by 90 degrees downwards and connected with; the power execution device comprises a gearbox shell, a motor shell and a screw rod, wherein the gearbox shell is fixedly arranged on the mounting bracket through an inner hexagonal cylindrical head bolt; the end part of the screw rod extending out of the gearbox shell is hinged with the tail end part of the Z-shaped parking pull arm, wherein the tail end part of the Z-shaped parking pull arm penetrates through the side part of the brake bottom plate and is bent downwards by 90 degrees.

The top end of one side edge part of the Z-shaped parking pull arm is hinged to the brake tendon through a pull arm pin.

The end part of the screw rod is hinged through a pin shaft and the end part of the Z-shaped parking pull arm, which penetrates through the side part of the braking bottom plate and is bent downwards by 90 degrees. The Z-shaped parking pull arm can be ensured to synchronously move with the screw rod along with the release of the motor signal.

The end part of the screw rod is provided with a pin hole for installing a pin shaft.

And a plastic support is arranged on the back surface of the brake bottom plate above the mounting support, and is supported and mounted on the motor shell.

The side portion of the Z-shaped parking pull arm after penetrating through the back face of the brake bottom plate is used as a first bending portion, the side of the first bending portion is further provided with two protruding structures A, a pull arm shield is sleeved outside the bending portion between the two protruding structures A, the inner ring of the pull arm shield is sleeved on the first bending portion, and the outer ring of the pull arm shield is sleeved on the long-strip-shaped through groove of the brake bottom plate. The tail of the first bending part is bent downwards by 90 degrees to form a second bending part, the tail end of the second bending part is provided with a pin hole for installing a pin shaft, the matching surface of the pin shaft and the head of the screw rod is designed into an arc shape, and the head of the screw rod and the Z-shaped parking arm are always in a contact state in the process of ensuring the movement of the Z-shaped parking arm.

The pull arm shield is made of rubber.

the invention can adjust the acting force of the screw rod on the Z-shaped parking pull arm through the positive and negative rotation of the motor, thereby achieving the anti-lock function during emergency braking.

The working principle of the invention is that a motor provides power torque, the torque is converted into thrust by a planetary gear to directly act on a Z-shaped parking pull arm of a drum brake through speed reduction and torque increase, a conical gear turns, and a screw barrel, so that the parking braking process is completed; when a parking release signal is obtained, the motor rotates reversely, the parking force of the screw rod acting on the Z-shaped parking pull arm of the drum brake is relieved, and the parking state of the vehicle is relieved.

The invention has the beneficial effects that:

The invention can directly push the Z-shaped parking pull arm to complete the electronic parking of the vehicle through the screw rod of the power executing mechanism. Under the condition that service braking fails, emergency braking operation is carried out, and the anti-lock brake system has an anti-lock function and is applied to all vehicle types.

drawings

FIG. 1 is a front elevational view of an electronic parking drum brake assembly in accordance with the present invention;

FIG. 2 is an exploded rear view of an electronic parking drum brake assembly in accordance with the present invention;

FIG. 3 is a front elevational view of the slave shoe assembly of FIG. 1;

FIG. 4 is a left side view of FIG. 3;

FIG. 5 is a left side elevational view of FIG. 4, taken from the rear of the shoe assembly;

3 fig. 3 6 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 4 3. 3

Fig. 7 is a perspective view of the pull arm shield.

In the figure: the brake device comprises a drum brake braking device, a 1.1 shoe with Z-shaped parking pull arm assembly, a 1.1.1Z-shaped parking pull arm, a 1.1.2 opening gasket, a 1.1.3 pull arm pin, a 1.1.4 braking tendon, a 1.2 braking bottom plate, a 1.3 mounting bracket, a 1.4 hexagon socket head cap screw bolt, a 1.5 plastic bracket, a 1.6 pin shaft, a 1.7 lock pin, a 1.8 pull arm shield, a 1.9 leading shoe assembly, a 2 power actuator, a 2.1 gear box shell, a 2.2 screw rod and a 2.3 motor shell.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description, installation and use thereof.

As shown in fig. 1, the electronic parking drum brake assembly comprises a leading shoe assembly 1.9, a trailing shoe assembly and a brake bottom plate 1.2, wherein the trailing shoe assembly comprises a brake shoe rib 1.1.4, the middle part of the brake shoe rib 1.1.4 is hinged to the brake bottom plate 1.2 through a shaft piece and a compression spring, and the electronic parking drum brake assembly further pushes a Z-shaped pull arm to realize a parking function and comprises a drum brake braking device 1 and a power executing device 2.

As shown in fig. 2, the drum brake device 1 includes a Z-shaped parking arm 1.1.1 of a Z-shaped parking arm assembly 1.1, and a mounting bracket 1.3, the top end of one side edge of the Z-shaped parking arm 1.1.1 is hinged to the side of a brake shoe 1.1.4 facing a brake base plate 1.2, i.e. the back of the brake shoe 1.1.4, the brake base plate 1.2 is provided with a strip-shaped through groove, the other side edge of the Z-shaped parking arm 1.1.1 is bent 90 degrees at the lower part and then passes through the strip-shaped through groove of the brake base plate 1.2 to horizontally extend to the back of the brake base plate 1.2, the tail end of the Z-shaped parking arm 1.1.1 horizontally passing through the back of the brake base plate 1.2 is bent 90 degrees downwards to form the Z-shaped parking arm and is connected with a screw 2.2, the strip-shaped through groove is arranged along the tangential direction of the Z-shaped parking arm 1.1.1.1 around the hinge point, the mounting bracket 1.3 is welded to the back of the brake base plate 1, is L-shaped, one side part of which is fixed on the back surface of the brake bottom plate 1.2, and the other side of which is arranged towards the motor shell 2.3. The back of the brake bottom plate 1.2 above the mounting bracket 1.3 is provided with a plastic bracket 1.5, the plastic bracket 1.5 is supported and mounted on the motor shell 2.3, and the position of the auxiliary motor shell 2.3 is fixed.

as shown in fig. 2, the power actuator 2 includes a gear box housing 2.1, a motor housing 2.3 and a screw 2.2, the gear box housing 2.1 is fixedly mounted on a mounting bracket 1.3 through an inner hexagonal socket head bolt 1.4, the motor housing 2.3 is mounted on the gear box housing 2.1, one end of the screw 2.2 is mounted in the gear box housing 2.1, a motor inside the motor housing 2.3 is connected and driven by a gear transmission structure inside the gear box housing 2.1 and the screw 2.2 to drive the screw 2.2 to move axially, and the screw 2.2 is parallel to the elongated through groove; the end part of the screw rod 2.2 extending out of the gearbox shell 2.1 is hinged with the tail end part of the Z-shaped parking pull arm 1.1.1, wherein the tail part of the Z-shaped parking pull arm penetrates through the braking bottom plate 1.2, and the side edge part of the Z-shaped parking pull arm is bent downwards by 90 degrees.

the end part of the screw rod 2.2 is hinged through the pin shaft 1.6, the lock pin 1.7 and the end part of the Z-shaped parking pull arm 1.1.1 which penetrates through the side edge part of the brake bottom plate 1.2 and is bent downwards by 90 degrees.

The end part of the screw rod 2.2 is provided with a pin hole for installing a pin shaft 1.6, and the lower part of the Z-shaped parking pull arm 1.1.1 is ensured to synchronously move with the screw rod 2.2 along with the release of a parking signal. The pin shaft 1.6 penetrates into pin holes of the screw rod 2.2 and the Z-shaped parking pull arm 1.1.1 in sequence and is locked by the lock pin 1.7, so that the screw rod 2.2 and the Z-shaped parking pull arm 1.1.1 are ensured to be always kept in a contact state in the parking braking process.

As shown in fig. 3-4, the top end of one side edge of the Z-shaped parking arm 1.1.1 is hinged to the slave brake tendon 1.1.4 through the arm-pulling pin 1.1.3 and the split washer 1.1.2, the split washer 1.1.2 carries out limit clamping on the arm-pulling pin 1.1.3, and the slave shoe belt Z-shaped parking arm assembly 1.1 is mainly composed of the Z-shaped parking arm 1.1.1, the slave brake tendon 1.1.4, the arm-pulling pin 1.1.3 and the split washer 1.1.2.

As shown in fig. 6, the side portion of the Z-shaped parking arm 1.1.1 after passing through the back of the brake bottom plate 1.2 serves as a first bending portion B, the side of the first bending portion B is further provided with two protruding structures a, the protruding structures a are used for installing and fixing the arm-pulling shield 1.8, the arm-pulling shield 1.8 is sleeved outside the bending portion B between the two protruding structures a, the arm-pulling shield 1.8 is provided with a through groove for the first bending portion B to pass through, the inner ring of the arm-pulling shield 1.8 is sleeved on the first bending portion B, and the outer ring is sleeved on the elongated through groove of the brake bottom plate 1.2.

In this way, the Z-shaped parking pull arm 1.1.1 is designed into a Z shape, as shown in fig. 4, the tail end of the first bending part B is bent downwards to form a second bending part C, and the three plane bending parts form a right angle; the second bending part C is provided with a pin hole, and the matching surface of the second bending part C and the head part of the screw rod is designed into an arc shape so as to ensure that the head part of the screw rod and the Z-shaped parking pull arm are always in a contact state in the movement process of the Z-shaped parking pull arm; the side edge part of the Z-shaped parking pull arm 1.1.1, which penetrates through the back of the brake bottom plate 1.2, is vertically arranged with the side edge part of the Z-shaped parking pull arm 1.1.1, which is fixed on the brake shoe rib 1.1.4.

The implementation working process of the invention is as follows:

When a parking signal is received, a motor inside a motor shell 2.3 provides power torque, a gear transmission structure inside a gear box shell 2.1 can be a planetary gear and bevel gear transmission structure, the torque is converted into thrust which directly acts on a Z-shaped parking pull arm 1.1.1 through a screw rod 2.2 to push and move the Z-shaped parking pull arm 1.1.1, the Z-shaped parking pull arm 1.1.1 rotates around a hinge point to push a self-adjusting mechanism assembly of a drum brake to drive a leading shoe assembly 1.9 and a tendon of a trailing shoe assembly to be opened, and then a friction plate on a shoe plate is driven to be in contact with the inner surface of a brake drum, so that the parking braking process of the drum brake is completed.

When a parking release signal is received, a motor in the motor shell 2.3 rotates reversely, the force of the screw rod 2.2 acting on the Z-shaped parking pull arm 1.1.1 is relieved, the Z-shaped parking pull arm 1.1.1 is pulled back to the original position, the Z-shaped parking pull arm 1.1.1 rotates around a hinge point to return, the shoe return spring drives the leading shoe assembly 1.9 and the tendon of the trailing shoe assembly to return, a friction plate on the shoe plate is not in contact with the inner surface of the brake drum, and the parking state of the vehicle is relieved.