CN110630659A - Electronic parking brake caliper special for parking brake - Google Patents
Electronic parking brake caliper special for parking brake Download PDFInfo
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- CN110630659A CN110630659A CN201910646110.8A CN201910646110A CN110630659A CN 110630659 A CN110630659 A CN 110630659A CN 201910646110 A CN201910646110 A CN 201910646110A CN 110630659 A CN110630659 A CN 110630659A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/2245—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members in which the common actuating member acts on two levers carrying the braking members, e.g. tong-type brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses an electronic parking brake caliper special for parking brake. The outer side brake block and the inner side brake block are respectively arranged on a main caliper body and an auxiliary caliper body, the connecting plate is fixedly arranged on a rear axle, the main caliper body is provided with a guide hole for penetrating through a caliper body guide pin and a caliper body guide pin sleeve, the caliper body guide pin sleeve is sleeved in the guide hole of the main caliper body, and the caliper body guide pin penetrates through the caliper body guide pin sleeve and is connected into a threaded hole of the connecting plate through threads, so that the main caliper body is connected with the connecting plate; and a clamp body return spring is connected between the end part of one end of the clamp body guide pin, which is far away from the connecting plate, and the main clamp body, so that the main clamp body elastically moves along the axial direction of the clamp body guide pin. The invention adopts a bracket-free structure, and achieves the purposes of zero drag, light weight, simple structure and good product assembly manufacturability of the brake caliper.
Description
Technical Field
The present invention relates to an electronic parking brake caliper, and more particularly, to an electronic parking brake caliper for parking brake.
Background
For some vehicle types which have higher requirements on the driving braking force of a rear axle and need to have a parking function, the scheme of installing single opposite multi-piston fixed calipers or floating calipers cannot simultaneously meet the requirements on the driving braking force and the parking braking force, and the design scheme of double calipers appears, wherein one of the double calipers is opposite multi-piston fixed calipers and is specially used for driving braking, and the other one is floating calipers and is specially used for parking braking.
The electronic parking brake caliper specially used for parking brake is based on a conventional support fixing and caliper body floating structure, an oil inlet hole and an air release screw which are related to a hydraulic brake system are removed, and a caliper body, a support, a piston, an inner side brake block assembly, an outer side brake block assembly, a parking mechanism and an actuating device are reserved. When the automobile is parked, the actuating device drives the parking mechanism to push the piston, the piston moves along the axial direction to push the inner side brake block assembly to press the inner side working face of the brake disc, and then the caliper body moves to push the outer side brake block assembly to press the outer side working face of the brake disc, so that parking is achieved. When parking is released, the actuating device reversely drives the parking mechanism to release pressure, the piston retracts along the axial direction under the action of the resilience force of the rectangular sealing ring, and parking braking is released. The structure is similar to the structure of the existing floating caliper for driving and parking, and only needs to be slightly modified, however, a series of problems of the floating caliper for driving and parking inevitably occur on the simplified brake caliper special for parking, such as 1. the structure of the bracket and the caliper body is complex, the requirement on the matching precision of the guide pin and the pin hole of the caliper body is high, and the processing cost is high; 2. the parking mechanism has a complex structure, a plurality of parts and high assembly requirements; 3. the brake pad and the piston cannot be completely retracted to the initial position after the parking brake is released, causing drag-wear of the brake disc and the brake pad, resulting in unnecessary wear of friction materials and loss of vehicle driving force.
The other type of the existing electronic parking brake caliper special for parking brake has the advantages that a support is removed on the basis of the former structure, the structure is further simplified, and the caliper body is directly installed on the connecting plate through the guide pin. When the automobile is parked, the actuating device drives the parking mechanism to push the piston, the piston moves along the axial direction to push the inner side brake block assembly to compress the inner side working face of the brake disc, and then the clamp body moves along the guide pin and drives the outer side brake block assembly to compress the outer side working face of the brake disc, so that parking is achieved. When parking is released, the actuating device reversely drives the parking mechanism to release pressure, the piston retracts along the axial direction under the action of the resilience force of the rectangular sealing ring, and parking braking is released. The structure simplifies the casting, processing and assembling procedures and reduces the cost, but the problems that the brake block and the piston can not accurately return to the initial position after the parking brake is released and the dragging torque is larger exist.
Disclosure of Invention
The invention aims to solve the problems that the conventional electronic parking brake caliper special for parking brake has large dragging torque, over-quick brake block abrasion, complex structure, poor product assembly manufacturability and the like.
The technical scheme adopted by the invention is as follows:
the invention comprises a connecting plate, a main caliper body, an auxiliary caliper body, a caliper body guide pin sleeve, a caliper body return spring, a brake block guide pin, an outer side brake block, an inner side brake block, a connecting mechanism, a piston and a screw rod; the clamp body comprises a main clamp body and an auxiliary clamp body, an outer side brake block and an inner side brake block are respectively arranged on the main clamp body and the auxiliary clamp body, a connecting plate is fixedly arranged on a rear axle, the main clamp body is provided with a guide hole for a clamp body guide pin and a clamp body guide pin sleeve to penetrate through, the clamp body guide pin sleeve is sleeved in the guide hole of the main clamp body, and the clamp body guide pin penetrates through the clamp body guide pin sleeve and is connected into a threaded hole of the connecting plate through threads, so that the main clamp body is connected with the connecting plate; a clamp body return spring is connected between the end part of one end of the clamp body guide pin, which is far away from the connecting plate, and the main clamp body, so that the main clamp body elastically moves along the axial direction of the clamp body guide pin; the end face of the main caliper body far away from the connecting plate is provided with a mounting hole, the end face of the main caliper body near the connecting plate is provided with a piston hole, the mounting hole is coaxially communicated with the piston hole through a communicating hole, a piston is arranged in the piston hole, a piston sealing ring is arranged between the outer wall of the piston and the inner wall of the piston hole of the main caliper body and is sealed through the piston sealing ring, the piston sealing ring adopts an O-shaped sealing ring, the end face of the piston far away from the connecting plate is provided with an internal thread hole, one end of a screw rod is provided with external threads and is screwed into the internal thread hole of the piston after penetrating through the mounting hole and the communicating hole of the main caliper body for matching, the other end of the screw rod extends out of the mounting hole of the main caliper body, the middle part of the screw rod is connected with the communicating hole of the main caliper body through a shaft sleeve and the sealing ring, the middle part of the screw rod, so that the screw is assembled and connected with the main clamp body; pin threaded holes are formed in two sides of a piston hole of the main caliper body, a brake block guide pin is installed in the pin threaded hole of the main caliper body in a threaded mode, and the inner side brake block is installed on a polished shaft section of the brake block guide pin and moves locally along the axial direction of the brake block guide pin; the piston is provided with a central hole on the end surface close to the connecting plate, the hole wall of the central hole is processed into an arc shape to form an inner circular groove, and the end surfaces of the piston at the two symmetrical sides around the central hole are provided with notches to form two trapezoidal grooves; the end face, close to the piston, of the inner side brake block is provided with two cylindrical bosses and a connecting mechanism, the connecting mechanism comprises a base and a spring ball plunger, the base is fixedly riveted to the center of the end face of the inner side brake block, the two cylindrical bosses are symmetrically and fixedly arranged on two sides of the base, the base protrudes out of the end face of the inner side brake block, the peripheral surface of the base is provided with a plurality of radial holes which are uniformly distributed at intervals along the circumferential direction, a spring ball plunger is arranged in each radial hole, the end part of the spring ball plunger is connected with the bottom of each radial hole through a spring, and the spring ball plunger moves in a radial telescopic mode under the action of the spring; the two cylindrical bosses are respectively embedded in the two trapezoidal grooves of the piston and used for limiting the rotation of the piston.
The connection formed by the inner side brake block and the piston through the connecting mechanism is a movable connection, the axial relative displacement of the inner side brake block relative to the axis of the piston is between 0 and 0.05mm, and the radial relative displacement of the inner side brake block relative to the piston is between 0 and 1 mm.
And the two ends of the clamp body guide pin are externally provided with a clamp body guide pin dust cover for preventing dust, one clamp body guide pin dust cover is sleeved outside a clamp body guide pin sleeve between the end part of one end of the clamp body guide pin, which is far away from the connecting plate, and the main clamp body, and the other clamp body guide pin dust cover is sleeved outside a clamp body guide pin sleeve between the end part of one end of the clamp body guide pin, which is close to the connecting plate, and the connecting plate.
The main clamp body is provided with a positioning boss used for positioning and limiting the return moving distance of the main clamp body at the periphery of the guide hole, and the positioning boss is used for contacting and connecting the end face of the connecting plate.
The surface of the positioning boss is sprayed with a polyurethane damping coating for relieving the impact force on the connecting plate when the main clamp body returns and reducing the noise attached.
Two annular antifriction gaskets are respectively arranged on the surfaces of the step between the communicating hole of the main clamp body and the piston hole and the step of the flange, and a screw rod between the two antifriction gaskets is sleeved with a needle roller bearing.
The clamp body return spring is always in a compressed state, and the spring force is between 10 and 300N.
An annular gap groove is formed between the inner edge hole end and the inner wall of the piston hole of the main clamp body, a piston dust cover is arranged at the annular gap groove, and the piston dust cover is used for preventing external dust and impurities from entering the piston dust cover.
The auxiliary clamp body is fixedly connected to the main clamp body through a bolt, a groove is machined in one side face E, close to the main clamp body, of the auxiliary clamp body, the outer side brake block is assembled in the groove of the auxiliary clamp body in an interference mode, and two through holes are machined in the groove.
Compared with the prior art, the invention has the beneficial effects that:
1. through processing the internal thread in the piston, make it directly cooperate with the screw rod, can save the swivel nut on the one hand, reduce the part, on the other hand can be through the removal distance and the direction of the accurate control piston of the number of turns and the direction of rotation of control screw rod for the piston can recover initial position fast when relieving parking braking.
2. Because the return of the piston is realized through the screw thread matching of the screw rod and the piston, the rectangular sealing ring which originally plays the roles of returning and sealing the piston can be replaced by the O-shaped sealing ring which only needs to have the role of sealing, the cost can be reduced, and the sliding resistance of the piston can be reduced.
3. The inner side brake block is connected with the piston through the connecting mechanism, so that the piston can drive the inner side brake block to move, and the inner side brake block is ensured to be completely separated from the brake disc without dragging after the brake is released.
4. By combining the caliper body return spring and the caliper body positioning boss, when braking is relieved, the caliper body moves along the guide pin under the action of the return spring force until the positioning boss is contacted with the connecting plate and then stops, so that the outer side brake block fixed on the auxiliary caliper body is completely separated from the brake disc without dragging.
After the brake is released, the inner side brake block and the outer side brake block can be completely separated from the brake disc without dragging, so that the brake block abrasion generated by parking brake is very little, the thickness of the friction material of the brake block can be greatly reduced, the length of a piston is shortened, and the total volume and the total mass of the brake caliper are reduced.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly described below. The figures show:
FIG. 1 is an axial view of the assembly of the present invention.
FIG. 2 is a cross-sectional view of the assembly of the present invention.
Fig. 3 is a sectional view showing the position of the guide pin of the caliper body.
FIG. 4 is a sectional view of the main clamp body according to the present invention.
Fig. 5 is a cross-sectional view of the position of the piston of the present invention.
FIG. 6 is a cross-sectional view of the inboard brake pad band attachment mechanism of the present invention.
FIG. 7 is a view of the inboard brake pad band attachment mechanism and piston shaft of the present invention.
FIG. 8 is a graph of static drag curves obtained from tests performed on an embodiment of the present invention.
In the drawing, 1, a connecting plate, 2, a main caliper body, 3, an auxiliary caliper body, 4, a caliper body guide pin dust cover, 5, an outer brake block, 6, an inner brake block, 7, a connecting mechanism, 8, a piston dust cover, 9, a piston sealing ring, 10, a piston, 11, a screw rod, 12, an antifriction washer, 13, a needle bearing, 14, a caliper body guide pin sleeve, 15, a caliper body guide pin, 16, a caliper body return spring, 17, a brake block guide pin, 18, a connecting mechanism base, 19, a spring ball plunger, 20, a positioning boss, 21, an inner circular groove, 22, a cylindrical boss and 23, a trapezoidal groove are arranged.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1 to 5, the electronic parking brake caliper assembly of the present invention includes a connecting plate 1, a main caliper 2, a sub caliper 3, a caliper guide pin 15, a caliper guide pin bushing 14, a caliper return spring 16, a brake pad guide pin 17, an outer brake pad 5, an inner brake pad 6, a connecting mechanism 7, a piston 10, and a screw 11.
As shown in fig. 2 and 3, the caliper body comprises a main caliper body 2 and an auxiliary caliper body 3, an outer side brake block 5 and an inner side brake block 6 are respectively installed on the main caliper body 2 and the auxiliary caliper body 3, a space of a brake disc is arranged between the outer side brake block 5 and the inner side brake block 6, as shown in fig. 1 and 2, the auxiliary caliper body 3 is fixedly connected to the main caliper body 2 through bolts, a groove is processed on one side surface E of the auxiliary caliper body 3 close to the main caliper body 2, the outer side brake block 5 is in interference fit in the groove of the auxiliary caliper body, and two through holes for detaching the outer side brake block 5 are processed in the groove.
The connecting plate 1 is fixedly installed on a rear axle, the main caliper body 2 is provided with a guide hole for a caliper body guide pin 15 and a caliper body guide pin sleeve 14 to penetrate through, as shown in fig. 4, two sides of the main caliper body 2 are respectively provided with a guide hole, the caliper body guide pin sleeve 14 is sleeved in a guide hole 24 of the main caliper body 2, and the caliper body guide pin 15 penetrates through the caliper body guide pin sleeve 14 and is connected into a threaded hole of the connecting plate 1 through threads, so that the main caliper body 2 is connected with the connecting plate 1; a caliper body return spring 16 is connected between the end part of the caliper body guide pin 15, which is far away from the connecting plate 1, and the main caliper body 2, the caliper body return spring 16 is sleeved outside the caliper body guide pin sleeve 14, and two ends of the caliper body return spring are respectively connected with the end part of the caliper body guide pin 15 and the main caliper body 2, so that the main caliper body 2 moves along the axial direction (X positive and negative directions) of the caliper body guide pin 15.
The two ends of the plier body guide pin 15 are respectively provided with a plier body guide pin dustproof cover 4 for preventing dust, one plier body guide pin dustproof cover 4 is sleeved outside a plier body guide pin sleeve 14 between the end part of one end of the plier body guide pin 15 far away from the connecting plate 1 and the main plier body 2, and the other plier body guide pin dustproof cover 4 is sleeved outside a plier body guide pin sleeve 14 between the end part of one end of the plier body guide pin 15 near the connecting plate 1 and the connecting plate 1; namely, a clamp body guide pin dust cover 4 and a clamp body return spring 16 are arranged between one end face A of the clamp body guide pin 15 and one end face B of the clamp body guide pin hole, and a clamp body guide pin dust cover 4 is arranged between one end face D of the clamp body guide pin sleeve 14 and one end face C of the clamp body guide pin hole.
As shown in fig. 4, a positioning boss 20 for positioning and limiting the return movement distance of the main clamp body 2 is arranged beside the hole of the guide hole 24 of the main clamp body 2, and the positioning boss 20 is used for contacting the end surface of the connecting plate 1. In specific implementation, the caliper body return spring 16 is always in a compressed state, the initial spring force is 10N, the spring force during parking braking is 200N, and after the parking braking is released, the spring 16 pushes the main caliper body 2 to move towards the positive direction close to the X direction of the connecting plate 1 until the positioning boss 20 of the main caliper body contacts the connecting plate 1, so that the main caliper body 2 is ensured to return to the initial position, and the return of the main caliper body 2 is realized.
The surface of the positioning boss 20 is sprayed with a polyurethane damping coating for relieving the impact force on the connecting plate 1 when the main clamp body returns and reducing the incidental noise.
As shown in fig. 2, the end face of the main caliper body 2 far away from the connecting plate 1 is processed with a mounting hole, the end face of the main caliper body 2 near the connecting plate 1 is processed with a piston hole, the mounting hole and the piston hole are coaxially communicated through a communication hole, the aperture of the communication hole is smaller than that of the mounting hole and the piston hole, the piston 10 is installed in the piston hole, the piston seal ring 9 is different from a rectangular seal ring adopted by the existing similar product, an O-shaped seal ring is adopted, the piston return is realized by elastic deformation of the rectangular seal ring from the existing similar product, the return is directly driven by a screw rod, and only the O-shaped seal ring is required to play a sealing role, namely.
And a piston sealing ring 9 is arranged between the outer wall of the piston 10 and the inner wall of the piston hole of the main clamp body 2 and is sealed by the piston sealing ring 9. Specifically, an annular groove is formed in the inner wall of a piston hole of the main clamp body 2, and a piston sealing ring 9 is installed in the annular groove.
An annular gap groove is formed between the inner edge hole end and the inner wall of the piston hole of the main clamp body 2, a piston dust cover 8 is arranged at the annular gap groove, and the piston dust cover 8 is used for blocking external dust and impurities from entering.
The piston 10 is processed at the terminal surface of keeping away from connecting plate 1 and is had the internal thread hole, screw rod 11 one end is processed and is had the external screw thread and pass the mounting hole of main tong body 2, screw in behind the intercommunicating pore cooperates in the internal thread hole of piston 10, the screw rod 11 other end stretches out from the mounting hole of main tong body 2, be connected through axle sleeve and sealing washer between the intercommunicating pore of screw rod 11 middle part and main tong body 2, and the screw rod 11 middle part processing that is located the piston hole has the flange dish, be connected through two antifriction gaskets 12 and a bearing 13 between the step that forms between the intercommunicating pore of main tong body 2 and the piston hole and the flange dish, make screw rod 11 assembly connection main tong body. Specifically, as shown in fig. 2, two annular anti-friction gaskets 12 are respectively installed on the surfaces of the step between the communication hole and the piston hole of the main caliper body 2 and the step of the flange, a screw 11 between the two anti-friction gaskets 12 is sleeved with a needle bearing 13, and two ends of the needle bearing 13 are connected to the two anti-friction gaskets 12.
As shown in fig. 4, pin threaded holes are formed in both sides of the piston hole of the main caliper body 2, a brake pad guide pin 17 is threadedly mounted in the pin threaded hole of the main caliper body 2, the inner brake pad 6 is mounted on the brake pad guide pin 17 through bosses with through holes on both sides, a section of movable optical axis is arranged on the brake pad guide pin 17, the inner brake pad 6 can move locally on the optical axis, and the inner brake pad 6 moves axially (in the positive and negative directions X) along the brake pad guide pin 17.
As shown in fig. 5 and 7, the piston 10 is provided with a central hole on the end surface near the connecting plate 1, the hole wall of the central hole is processed into an arc to form an inner circular groove 21, and the end surfaces of the piston 10 at the two symmetrical sides around the central hole are provided with notches to form two trapezoidal grooves 23.
As shown in fig. 6 and 7, the end surface of the inner brake pad 6 close to the piston 10 is provided with two cylindrical bosses 22 and a connecting mechanism 7, the connecting mechanism 7 includes a base 18 and a spring ball plunger 19, the base 18 is riveted and fixed at the center of the end surface of the inner brake pad 6, the two cylindrical bosses 22 are symmetrically and fixedly arranged at two sides of the base 18, the base 18 protrudes out of the end surface of the inner brake pad 6, the circumferential surface of the base 18 is provided with a plurality of radial holes which are uniformly distributed along the circumferential direction at intervals, each radial hole is provided with one spring ball plunger 19, the end part of the spring ball plunger 19 is connected with the hole bottom part of the radial hole through a spring, the spring ball plunger 19 radially stretches and moves under the action of the spring, and is embedded in; two cylindrical bosses 22 are fitted into two trapezoidal grooves 23 of the piston 10, respectively, for restricting rotation of the piston 10. The structure enables the connection formed by the inner side brake block and the piston through the connecting mechanism to be movably connected.
The connecting mechanism 7 utilizes a spring ball plunger 19 to clamp an inner circular groove of the piston 10, so that the inner side brake block 6 is axially fixedly connected with the piston 10 and can be movably detached. The connecting mechanism 7 limits the axial relative displacement and the radial relative displacement of the inner side brake block and the piston, the axial relative displacement is between 0 and 0.05mm and is determined by the difference between the outer diameter of the spring ball plunger and the outer diameter of the inner circular groove of the piston, and the radial relative displacement is between 0 and 1 mm. The movable connection is designed to avoid that the brake pads transmit the displacement to the piston in the form of force, mainly considering that the brake pads have the same displacement along the rotation direction of the disc when braking.
When the piston 10 and the inner side brake block 6 are connected and mounted, the base 18 of the inner side brake block 6 is only required to be aligned with the central hole of the piston 10, the two cylindrical bosses 22 of the inner side brake block 6 are aligned with the two trapezoidal grooves 23 of the piston 10, then the inner side brake block 6 is pressed to move towards the piston 10, so that the four spring ball plungers 19 contract firstly and then stretch into the embedded inner circular grooves 21, and the piston 10 is coaxially connected with the inner side brake block 6.
The external power drives the screw rod 11 to rotate, the piston 10 is driven to move axially along the screw rod 11 through the guiding and limiting effect of the thread pair and the piston hole on the piston 10, and then the inner side brake block 6 is driven to move along the direction far away from or close to the outer side brake block 5, so that braking and brake release are realized.
In specific implementation, the brake caliper structure of the present invention is subjected to a static drag test to obtain data as follows, and the obtained continuous curve is shown in fig. 8:
static drag data
| First ring | The tenth ring | |
| Moment N.m | 0.27 | <0.05 |
As can be seen from the results of the table and the graph data, the static dragging of the invention is greatly reduced, the static dragging actual measurement data and the curve display dragging torque are approximately zero, and the effect is stable.
Therefore, the electronic parking brake caliper solves the technical problems of large dragging torque, over-quick brake pad abrasion, complex structure, poor product assembly manufacturability and the like of the conventional electronic parking brake caliper specially used for parking brake.
Claims (9)
1. The utility model provides a be exclusively used in electronic parking brake calliper of parking brake which characterized in that: the clamp comprises a connecting plate (1), a main clamp body (2), an auxiliary clamp body (3), a clamp body guide pin (15), a clamp body guide pin sleeve (14), a clamp body return spring (16), a brake block guide pin (17), an outer side brake block (5), an inner side brake block (6), a connecting mechanism (7), a piston (10) and a screw (11); the clamp body comprises a main clamp body (2) and an auxiliary clamp body (3), an outer side brake block (5) and an inner side brake block (6) are respectively installed on the main clamp body (2) and the auxiliary clamp body (3), a connecting plate (1) is fixedly installed on a rear axle, the main clamp body (2) is provided with a guide hole for a clamp body guide pin (15) and a clamp body guide pin sleeve (14) to penetrate through, the clamp body guide pin sleeve (14) is sleeved in a guide hole (24) of the main clamp body (2), and the clamp body guide pin (15) penetrates through the clamp body guide pin sleeve (14) and is connected into a threaded hole of the connecting plate (1) through threads, so that the main clamp body (2) is connected with the connecting plate (1); a clamp body return spring (16) is connected between one end part of the clamp body guide pin (15) far away from the connecting plate (1) and the main clamp body (2), so that the main clamp body (2) elastically moves along the axial direction of the clamp body guide pin (15); the end face of the main caliper body (2) far away from the connecting plate (1) is processed with a mounting hole, the end face of the main caliper body (2) near the connecting plate (1) is processed with a piston hole, the mounting hole and the piston hole are coaxially communicated through a communication hole, a piston (10) is installed in the piston hole, a piston sealing ring (9) is arranged between the outer wall of the piston (10) and the inner wall of the piston hole of the main caliper body (2), the piston sealing ring (9) adopts an O-shaped sealing ring, the end face of the piston (10) far away from the connecting plate (1) is processed with an internal thread hole, one end of a screw rod (11) is processed with an external thread and penetrates through the mounting hole of the main caliper body (2), the piston sealing ring is screwed into the internal thread hole of the piston (10) to be matched, the other end of the screw rod (11) extends out of the mounting hole of the main caliper body (2), the middle, a flange disc is processed in the middle of the screw rod (11) positioned in the piston hole, and a step formed between the communicating hole of the main clamp body (2) and the piston hole is connected with the flange disc through two anti-wear gaskets (12) and a needle bearing (13), so that the screw rod (11) is assembled and connected with the main clamp body (2); pin threaded holes are formed in two sides of a piston hole of the main caliper body (2), a brake block guide pin (17) is installed in the pin threaded hole of the main caliper body (2) in a threaded mode, and the inner side brake block (6) is installed on a polished shaft section of the brake block guide pin (17) and moves locally along the axial direction of the brake block guide pin (17); a central hole is processed on the end surface of the piston (10) close to the connecting plate (1), the hole wall of the central hole is processed into an arc shape to form an inner circular groove (21), and notches are formed on the end surfaces of the piston (10) at the two symmetrical sides around the central hole to form two trapezoidal grooves (23); the end face, close to a piston (10), of an inner side brake block (6) is provided with two cylindrical bosses (22) and a connecting mechanism (7), the connecting mechanism (7) comprises a base (18) and a spring ball plunger (19), the base (18) is fixedly riveted to the center of the end face of the inner side brake block (6), the two cylindrical bosses (22) are symmetrically and fixedly arranged on two sides of the base (18), the base (18) protrudes out of the end face of the inner side brake block (6), the peripheral surface of the base (18) is provided with a plurality of radial holes which are uniformly distributed at intervals along the circumferential direction, a spring ball plunger (19) is installed in each radial hole, the end part of the spring ball plunger (19) is connected with the bottom of each radial hole through a spring, and the spring ball plunger (19) moves in a radial telescopic mode under the action of the spring and is embedded in an inner circle groove; the two cylindrical bosses (22) are respectively embedded in the two trapezoidal grooves (23) of the piston (10) and used for limiting the rotation of the piston (10).
2. An electronic parking brake caliper dedicated to parking braking according to claim 1, characterized in that: the connection formed by the inner side brake block (6) and the piston (10) through a connecting mechanism (7) is a movable connection, the axial relative displacement of the inner side brake block (6) relative to the axis of the piston (10) is between 0 and 0.05mm, and the radial relative displacement of the inner side brake block (6) relative to the piston (10) is between 0 and 1 mm.
3. An electronic parking brake caliper dedicated to parking braking according to claim 1, characterized in that: the clamp body guide pin dustproof structure is characterized in that dustproof clamp body guide pin dustproof covers (4) are arranged outside two ends of the clamp body guide pin (15), one clamp body guide pin dustproof cover (4) is sleeved outside a clamp body guide pin sleeve (14) between one end part of the clamp body guide pin (15), which is far away from the connecting plate (1), and the main clamp body (2), and the other clamp body guide pin dustproof cover (4) is sleeved outside a clamp body guide pin sleeve (14) between one end part of the clamp body guide pin (15), which is close to the connecting plate (1), and the connecting plate (1).
4. An electronic parking brake caliper dedicated to parking braking according to claim 1, characterized in that: the main clamp body (2) is provided with a positioning boss (20) used for positioning and limiting the return moving distance of the main clamp body (2) beside the hole of the guide hole (24), and the positioning boss (20) is used for contacting and connecting the end face of the connecting plate (1).
5. An electronic parking brake caliper dedicated to parking braking according to claim 1, characterized in that: the surface of the positioning boss (20) is sprayed with a polyurethane damping coating for relieving the impact force on the connecting plate (1) when the main clamp body returns and reducing the noise.
6. An electronic parking brake caliper dedicated to parking braking according to claim 1, characterized in that: two annular antifriction gaskets (12) are respectively arranged on the step between the communicating hole of the main clamp body (2) and the piston hole and the step surface of the flange, and a screw rod (11) between the two antifriction gaskets (12) is sleeved with a needle roller bearing (13).
7. An electronic parking brake caliper dedicated to parking braking according to claim 1, characterized in that: the clamp body return spring (16) is always in a compressed state, and the spring force is between 10 and 300N.
8. An electronic parking brake caliper dedicated to parking braking according to claim 1, characterized in that: an annular gap groove is formed between the inner edge hole end and the inner wall of the piston hole of the main clamp body (2), a piston dust cover (8) is arranged at the annular gap groove, and the piston dust cover (8) is used for preventing external dust and impurities from entering.
9. An electronic parking brake caliper dedicated to parking braking according to claim 1, characterized in that: the auxiliary clamp body (3) is fixedly connected to the main clamp body (2) through a bolt, a groove is machined in one side face E, close to the main clamp body (2), of the auxiliary clamp body (3), an outer side brake block (5) is assembled in the groove of the auxiliary clamp body in an interference mode, and two through holes are machined in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910646110.8A CN110630659A (en) | 2019-07-17 | 2019-07-17 | Electronic parking brake caliper special for parking brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910646110.8A CN110630659A (en) | 2019-07-17 | 2019-07-17 | Electronic parking brake caliper special for parking brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110630659A true CN110630659A (en) | 2019-12-31 |
Family
ID=68968984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910646110.8A Pending CN110630659A (en) | 2019-07-17 | 2019-07-17 | Electronic parking brake caliper special for parking brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110630659A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357297A (en) * | 2021-06-01 | 2021-09-07 | 北京汽车集团越野车有限公司 | 24 volt double-cylinder double-motor EPB brake caliper assembly and vehicle |
| CN114941669A (en) * | 2022-04-24 | 2022-08-26 | 芜湖伯特利汽车安全系统股份有限公司 | Method and structure for reducing drag torque of brake caliper assembly |
-
2019
- 2019-07-17 CN CN201910646110.8A patent/CN110630659A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357297A (en) * | 2021-06-01 | 2021-09-07 | 北京汽车集团越野车有限公司 | 24 volt double-cylinder double-motor EPB brake caliper assembly and vehicle |
| CN114941669A (en) * | 2022-04-24 | 2022-08-26 | 芜湖伯特利汽车安全系统股份有限公司 | Method and structure for reducing drag torque of brake caliper assembly |
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