Anti-blocking rotating machine electric brake based on reverse planetary roller screw

Abstract

The utility model discloses an anti-blocking rotating machine electric brake based on a reverse planetary roller screw, and belongs to the field of brakes. One end of the reverse planetary roller screw is connected with a driving shaft of the motor assembly; the brake assembly is connected with the other end of the reverse planetary roller screw; and the band-type brake assembly is matched with the reverse planetary roller screw. The utility model has the technical effects that not only is the torque transmission efficiency high, but also the motor is prevented from being in a large-current locked-rotor state for a long time during parking.

Description

Technical Field

[0001] The utility model relates to a brake, in particular to an anti-stall electromechanical brake based on a reverse planetary roller screw. Background Art

[0002] A brake is a device that has the function of slowing down, stopping or keeping moving parts in a stopped state. It generally includes electro-hydraulic brakes and electromechanical brakes and is widely used in the automotive field.

[0003] Electromechanical brakes are a common type of brake, but their torque transmission efficiency is low, which can easily cause large energy losses. At the same time, the motors of these electromechanical brakes are prone to being in a high-current stalled state for a long time when parking, greatly shortening the motor's service life. Utility Model Content

[0004] Purpose of the utility model: The purpose of the utility model is to provide an anti-stall electromechanical brake based on a reverse planetary roller screw, which not only makes the torque transmission efficiency high, but also prevents its motor from being in a high-current stall state for a long time when parking.

[0005] Technical solution: An anti-stall electromechanical brake based on a reverse planetary roller screw, comprising:

[0006] Motor assembly;

[0007] a reverse planetary roller screw, one end of which is connected to the drive shaft of the motor assembly;

[0008] a brake assembly connected to the other end of the reverse planetary roller screw;

[0009] A brake assembly cooperates with the reverse planetary roller screw.

[0010] Optionally, the brake assembly includes:

[0011] Fixed frame;

[0012] A brake unit connected to the fixing frame cooperates with the reverse planetary roller screw.

[0013] Optionally, the brake unit includes:

[0014] a first brake shoe connected to one end of the fixing frame;

[0015] an armature, one end of the armature being rotatably connected to the other end of the fixing frame;

[0016] a second brake shoe connected to the other end of the armature;

[0017] an elastic member, one end of the elastic member being connected to the fixing frame, and the other end of the elastic member being connected to one end of the armature;

[0018] a coil sleeved on the outside of the armature, the coil being connected to the fixing frame;

[0019] Wherein, the first brake shoe and the second brake shoe are both matched with the reverse planetary roller screw.

[0020] Optionally, the reverse planetary roller screw includes:

[0021] a nut connected to the drive shaft of the motor assembly;

[0022] A plurality of rollers each threadedly sleeved in the nut;

[0023] A push rod is threadedly sleeved in the plurality of rollers, and the push rod is connected to the brake assembly.

[0024] Optionally, the reverse planetary roller screw further includes a first retaining frame and a second retaining frame respectively rotatably connected to both ends of the plurality of rollers, and the first retaining frame and the second retaining frame are both rotatably connected to the push rod.

[0025] Optionally, the motor assembly includes:

[0026] Motor body;

[0027] A planetary reducer, wherein the input shaft of the planetary reducer is connected to the output shaft of the motor body, the output shaft of the planetary reducer is connected to one end of the reverse planetary roller screw, and the output shaft of the planetary reducer is configured as the drive shaft of the motor assembly.

[0028] Optionally, the motor assembly further includes a housing, and the motor body and the planetary reducer are both located within the housing.

[0029] Optionally, the motor assembly further includes a plurality of heat dissipation louvers connected to the housing.

[0030] Optionally, the brake assembly includes:

[0031] brake calipers;

[0032] a static friction plate connected to an interior of one side of the brake caliper;

[0033] a dynamic friction plate movably located inside the other side of the brake caliper, the dynamic friction plate being connected to the other end of the reverse planetary roller screw;

[0034] a brake disc, at least a portion of which is located between the static friction plate and the dynamic friction plate;

[0035] Wherein, the other end of the reverse planetary roller screw is movably matched with the other side of the brake caliper.

[0036] Optionally, the brake assembly further includes a channel provided in the brake caliper, the static friction plate and the dynamic friction plate are respectively located on both sides of the channel, and at least a portion of the brake disc is located in the channel.

[0037] Beneficial effects:

[0038] 1) During braking, the drive shaft of the motor assembly drives the inverse planetary roller screw to rotate, and the inverse planetary roller screw drives the brake assembly to complete braking, so that the torque of the drive shaft of the motor assembly is directly converted into braking force, thereby facilitating high torque transmission efficiency and reducing energy loss;

[0039] 2) The brake assembly is used to lock or unlock the reverse planetary roller screw. When the car is driving, the brake assembly is energized, so that the brake assembly unlocks the reverse planetary roller screw. When the car is parked, the brake assembly is de-energized, so that the brake assembly locks the reverse planetary roller screw, thereby preventing the motor assembly of the electromechanical brake of the present application from being in a high-current stalled state for a long time when the car is parked, thereby facilitating the increase of the service life of the motor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is one of the structural schematic diagrams of an anti-stall electromechanical brake based on a reverse planetary roller screw according to Example 1 of the present utility model;

[0041] Figure 2 This is a second structural diagram of an anti-stall electromechanical brake based on a reverse planetary roller screw according to Example 1 of the present utility model;

[0042] Figure 3 Schematic diagram of the structure of the reverse planetary roller screw of Example 1 of the present utility model;

[0043] Figure 4 This is a structural diagram of the brake assembly of Example 1 of the present utility model;

[0044] Figure 5 This is a schematic diagram of a control system according to Example 1 of the present utility model;

[0045] In the figure: 1. Motor assembly; 11. Motor body; 12. Planetary reducer; 13. Housing; 14. Heat dissipation louvers; 2. Reversed planetary roller screw; 21. First retaining frame; 22. Second retaining frame; 23. Nut; 24. Roller; 25. Push rod; 3. Brake assembly; 31. Brake caliper; 311. Channel; 32. Static friction plate; 33. Dynamic friction plate; 34. Brake disc; 4. Brake assembly; 41. Fixing frame; 42. Brake unit; 421. First brake shoe; 422. Second brake shoe; 423. Armature; 424. Elastic member; 425. Coil. DETAILED DESCRIPTION

[0046] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Example 1

[0048] like Figure 1-2 This embodiment provides an anti-stall electromechanical brake based on a reverse planetary roller screw, including: a motor assembly 1; a reverse planetary roller screw 2, one end of the reverse planetary roller screw 2 is connected to the drive shaft of the motor assembly 1; a brake assembly 3 connected to the other end of the reverse planetary roller screw 2; and a brake assembly 4 that cooperates with the reverse planetary roller screw 2.

[0049] Specifically, during braking, the drive shaft of the motor assembly 1 drives the reverse planetary roller screw 2 to rotate, and the reverse planetary roller screw 2 drives the brake assembly 3 to complete braking, so that the torque of the drive shaft of the motor assembly 1 is directly converted into braking force, thereby making it easy to increase the torque transmission efficiency and thus reduce energy loss. Among them, the motor assembly 1 is used to provide power. The motor assembly 1 can specifically include a motor body 11, a planetary reducer 12, etc. The motor assembly 1 needs to be controlled by a control system, specifically as follows Figure 5 As shown; the reverse planetary roller screw 2 is used to convert rotational motion into linear motion; the brake assembly 3 is used for braking; the brake assembly 4 is used to lock or unlock the reverse planetary roller screw 2. When the car is driving, the brake assembly 4 is energized, so that the brake assembly 4 unlocks the reverse planetary roller screw 2. When the car is parked, the brake assembly 4 is de-energized, so that the brake assembly 4 locks the reverse planetary roller screw 2, thereby preventing the motor assembly 1 of the electromechanical brake of this application from being in a high-current stalled state for a long time when parking, thereby facilitating the increase of the service life of the motor assembly 1.

[0050] Further, such as Figure 4The brake assembly 4 includes a mounting bracket 41 and a brake unit 42 connected to the mounting bracket 41. The brake unit 42 cooperates with the inverted planetary roller screw 2. Specifically, the mounting bracket 41 is used to support the brake unit 42, which is used to lock or unlock the inverted planetary roller screw 2.

[0051] Further, such as Figure 4 The brake unit 42 includes: a first brake shoe 421 connected to one end of the fixed frame 41; an armature 423, one end of the armature 423 is rotatably connected to the other end of the fixed frame 41; a second brake shoe 422 connected to the other end of the armature 423; an elastic member 424, one end of the elastic member 424 is connected to the fixed frame 41, and the other end of the elastic member 424 is connected to one end of the armature 423; a coil 425 sleeved on the outside of the armature 423, and the coil 425 is connected to the fixed frame 41; wherein, the first brake shoe 421 and the second brake shoe 422 are both matched with the reverse planetary roller screw 2.

[0052] Specifically, when the car is driving, the coil 425 is energized, and the coil 425 attracts the armature 423, causing one end of the armature 423 to rotate counterclockwise around the other end of the fixed frame 41 (the elastic member 424 is further compressed), thereby causing the second brake shoe 422 to move away from the first brake shoe 421, completing the unlocking of the reverse planetary roller screw 2; when the car is parked, the coil 425 is de-energized, and the elastic member 424 is reset, causing one end of the armature 423 to rotate clockwise around the other end of the fixed frame 41, thereby causing the second brake shoe 422 to move toward the first brake shoe 421, completing the locking of the reverse planetary roller screw 2; wherein the material of the elastic member 424 can be spring steel, rubber, etc.

[0053] Further, such as Figure 3 The reverse planetary roller screw 2 includes: a nut 23 connected to the drive shaft of the motor assembly 1; a plurality of rollers 24 threadedly sleeved in the nut 23; a push rod 25 threadedly sleeved in the plurality of rollers 24, and the push rod 25 is connected to the brake assembly 3.

[0054] Specifically, during braking, the drive shaft of the motor assembly 1 drives the nut 23 to rotate, the nut 23 drives the plurality of rollers 24 to rotate, the plurality of ball bearings drives the push rod 25 to move, and the push rod 25 drives the brake assembly 3 to complete braking. It should be noted that the reverse type in this application means that the nut 23 rotates and the push rod 25 moves. In other words, the forward type means that the nut 23 moves and the push rod 25 rotates.

[0055] Further, such as Figure 3The reverse planetary roller screw 2 further includes a first retainer 21 and a second retainer 22 rotatably connected to both ends of the plurality of rollers 24. The first retainer 21 and the second retainer 22 are both rotatably connected to the push rod 25. Specifically, the first retainer 21 and the second retainer 22 are both used to ensure smooth rotation of the plurality of rollers 24.

[0056] Further, such as Figure 2 The motor assembly 1 includes a motor body 11 and a planetary reducer 12. The input shaft of the planetary reducer 12 is connected to the output shaft of the motor body 11. The output shaft of the planetary reducer 12 is connected to one end of the inverted planetary roller screw 2. The output shaft of the planetary reducer 12 is configured as the drive shaft of the motor assembly 1. Specifically, the output shaft of the motor body 11 sequentially drives the input shaft of the planetary reducer 12, the output shaft of the planetary reducer 12, and one end of the inverted planetary roller screw 2 to rotate, thereby achieving low speed and high torque output.

[0057] Further, such as Figure 2 The motor assembly 1 further includes a housing 13, and the motor body 11 and the planetary reducer 12 are both located in the housing 13. Specifically, the housing 13 is used to carry the motor body 11 and the planetary reducer 12.

[0058] Further, such as Figure 2 The motor assembly 1 further includes a plurality of heat dissipation louvers 14 connected to the housing 13. Specifically, the plurality of heat dissipation louvers 14 are used to dissipate heat, so as to ensure the working performance of the motor assembly 1.

[0059] Further, such as Figure 2 The brake assembly 3 includes: a brake caliper 31; a static friction plate 32 connected to the inside of one side of the brake caliper 31; a dynamic friction plate 33 movably located inside the other side of the brake caliper 31, and the dynamic friction plate 33 is connected to the other end of the reverse planetary roller screw 2; a brake disc 34, at least part of the brake disc 34 is located between the static friction plate 32 and the dynamic friction plate 33; wherein the other end of the reverse planetary roller screw 2 is movably matched with the other side of the brake caliper 31.

[0060] Specifically, during braking, the other end of the reverse planetary roller screw 2 drives the dynamic friction plate 33 to move toward the static friction plate 32, so that the dynamic friction plate 33, at least part of the brake disc 34 and the static friction plate 32 are in close contact, thereby completing braking.

[0061] Further, such as Figure 2 The brake assembly 3 further includes a channel 311 provided in the brake caliper 31. The static friction plate 32 and the dynamic friction plate 33 are respectively located on either side of the channel 311. At least a portion of the brake disc 34 is located within the channel 311. Specifically, the channel 311 is used to accommodate the static friction plate 32, the dynamic friction plate 33, and at least a portion of the brake disc 34.

[0062] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An anti-stall electromechanical brake based on a reverse planetary roller screw, characterized in that: include: Motor assembly; a reverse planetary roller screw, one end of which is connected to the drive shaft of the motor assembly; a brake assembly connected to the other end of the reverse planetary roller screw; A brake assembly cooperates with the reverse planetary roller screw.

2. The anti-stall electromechanical brake based on a reverse planetary roller screw according to claim 1, characterized in that: The brake assembly includes: Fixed frame; A brake unit connected to the fixing frame cooperates with the reverse planetary roller screw.

3. The anti-stall electromechanical brake based on a reverse planetary roller screw according to claim 2, characterized in that: The brake unit includes: a first brake shoe connected to one end of the fixing frame; an armature, one end of the armature being rotatably connected to the other end of the fixing frame; a second brake shoe connected to the other end of the armature; an elastic member, one end of the elastic member being connected to the fixing frame, and the other end of the elastic member being connected to one end of the armature; a coil sleeved on the outside of the armature, the coil being connected to the fixing frame; Wherein, the first brake shoe and the second brake shoe are both matched with the reverse planetary roller screw.

4. An anti-stall electromechanical brake based on a reverse planetary roller screw according to any one of claims 1 to 3, characterized in that: The reverse planetary roller screw comprises: a nut connected to the drive shaft of the motor assembly; A plurality of rollers each threadedly sleeved in the nut; A push rod is threadedly sleeved in the plurality of rollers, and the push rod is connected to the brake assembly.

5. The anti-stall electromechanical brake based on a reverse planetary roller screw according to claim 4, characterized in that: The reverse planetary roller screw further includes a first retaining frame and a second retaining frame which are respectively rotatably connected to the two ends of the plurality of rollers, and the first retaining frame and the second retaining frame are both rotatably connected to the push rod.

6. An anti-stall electromechanical brake based on a reverse planetary roller screw according to any one of claims 1 to 3, characterized in that: The motor assembly comprises: Motor body; A planetary reducer, wherein the input shaft of the planetary reducer is connected to the output shaft of the motor body, the output shaft of the planetary reducer is connected to one end of the reverse planetary roller screw, and the output shaft of the planetary reducer is configured as the drive shaft of the motor assembly.

7. The anti-stall electromechanical brake based on a reverse planetary roller screw according to claim 6, characterized in that: The motor assembly further includes a housing, and the motor body and the planetary reducer are both located in the housing.

8. The anti-stall electromechanical brake based on a reverse planetary roller screw according to claim 7, characterized in that: The motor assembly also includes a plurality of heat dissipation louvers connected to the housing.

9. An anti-stall electromechanical brake based on a reverse planetary roller screw according to any one of claims 1 to 3, characterized in that: The brake assembly comprises: brake calipers; a static friction plate connected to an interior of one side of the brake caliper; a dynamic friction plate movably located inside the other side of the brake caliper, the dynamic friction plate being connected to the other end of the reverse planetary roller screw; a brake disc, at least a portion of which is located between the static friction plate and the dynamic friction plate; Wherein, the other end of the reverse planetary roller screw is movably matched with the other side of the brake caliper.

10. The anti-stall electromechanical brake based on a reverse planetary roller screw according to claim 9, characterized in that: The brake assembly further includes a channel provided in the brake caliper, the static friction plate and the dynamic friction plate are respectively located on both sides of the channel, and at least a portion of the brake disc is located in the channel.

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