Brushless electric supporting rod capable of emergency braking

Abstract

The utility model discloses a brushless electric supporting rod capable of emergency braking. The brushless electric supporting rod comprises a lead screw assembly for driving a tail door to act and a driving assembly for driving the lead screw assembly to act. A ball head sleeve is arranged at the input end of the lead screw assembly, a damper assembly in transmission connection with the lead screw assembly is arranged in the ball head sleeve, an electromagnetic braking assembly is arranged in the ball head sleeve, and the action end of the electromagnetic braking assembly extends out and abuts against the damper assembly to limit action of the lead screw assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a brushless electric support rod capable of emergency braking. Background Art

[0002] With the continuous development of the automobile industry, car styles have become more and more diversified. Existing cars are generally equipped with electric tailgates, which are actually electric trunks. To open the trunk, just press a button in the car or a remote control key, and the trunk will open automatically. The tailgate support rod is an indispensable component of the tailgate of an electric car.

[0003] The existing tailgate support rod generally drives the screw rod to rotate through a motor, thereby driving the tailgate to open or close. During the operation of the tailgate, users or objects may often be clamped. Therefore, the general tailgate support rod will have an emergency braking structure at the motor to brake the motor. However, directly braking the motor can easily cause damage to the motor and affect the service life of the electric support rod. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model proposes a brushless electric strut capable of emergency braking.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A brushless electric prop capable of emergency braking comprises a screw rod assembly for driving a tailgate, and a driving assembly for driving the screw rod assembly;

[0007] The input end of the screw assembly is provided with a ball sleeve, a damper assembly is provided in the ball sleeve and is transmission-connected to the screw assembly, and an electromagnetic brake assembly is provided in the ball sleeve, and the action end of the electromagnetic brake assembly extends out and abuts against the damper assembly to limit the action of the screw assembly.

[0008] Preferably, the damper assembly includes a mounting shell fixed in the ball head sleeve, a fixed gasket fixed in the housing, a damping gasket rotated in the mounting shell, and a first elastic element driving the fixed gasket and the damping gasket to abut against each other, the damping gasket is connected to the screw assembly, and the damping gasket and the fixed gasket are alternately arranged, at least one of the damping gasket and the fixed gasket provides a friction surface, and the damping gasket abuts against the electromagnetic brake assembly. Through the above improvements, when the electromagnetic brake assembly abuts against the damping gasket, it will limit the damping gasket from rotating, making the screw unable to rotate, avoiding further movement of the car tailgate, thereby avoiding injuries to the user.

[0009] Preferably, the screw assembly has a connection end connected to the damper assembly, and the connection end is formed with teeth, and the damping gasket is inserted into the connection end and rotates with the screw assembly. Through the above improvement, the damping gasket rotates with the screw assembly, and when the damping gasket is restricted from rotating, the screw cannot rotate, thereby preventing the car tailgate from further moving, thereby preventing the user from being injured.

[0010] Preferably, the electromagnetic brake assembly includes a housing, an abutting portion for abutting the damping gasket, and a driving portion for driving the abutting portion to move, and a second elastic element is arranged in the housing, one end of the second elastic element abuts the housing, and the other end abuts the abutting portion, so that the abutting portion always has a tendency to move toward the damping gasket. Through the above improvements, when the driving portion acts on the abutting portion, the abutting portion overcomes the force of the second elastic element and fits the driving portion, so that the damping gasket rotates normally. When the driving portion does not act on the abutting portion, the second elastic element will push the abutting portion out, so that the abutting portion abuts on the damping gasket and limits the damping gasket from rotating, so that the screw assembly cannot continue to move, ensuring the user's installation.

[0011] Preferably, the driving part at least includes a power-on state and a power-off state. When the driving part is in the power-on state, the abutment part fits the driving part and is away from the damping pad. When the driving part is in the power-off state, the second elastic element drives the abutment part away from the driving part and forces the abutment part to abut against the damping pad. Through the above improvements, the position of the abutment part is controlled by the driving part and the second elastic element, so as to realize emergency braking of the screw assembly and improve the safety of the vehicle tailgate.

[0012] Preferably, the housing is provided with a current detection module for controlling the power on or off of the driving part. Through the above improvements, the current detection module can detect the current of the driving part. When the tailgate encounters interference, the current of the driving part will increase. When the current increases, the current detection module will control the driving part to enter a power-off state, so that the abutment part is pushed out and the screw rod assembly is restricted from continuing to move, thereby preventing the vehicle tailgate from causing damage to the user.

[0013] Preferably, the outer shell is in contact with the inner part of the ball head cover, a support platform is formed in the outer shell, and one end of the outer shell is in contact with the mounting shell, and the other end is in contact with the support platform. Through the above improvements, the stability of the outer shell installation is improved.

[0014] Preferably, the housing is formed with an abutting convex portion abutting against the first elastic element, one end of the first elastic element abuts against the abutting convex portion, and the other end abuts against the damping gasket. Through the above improvement, the first elastic element applies pressure to the damping gasket, increasing the friction between the damping gasket and the fixed gasket, thereby improving the holding force of the support rod, so that the tailgate of the car can be kept at a certain angle.

[0015] Preferably, the end of the abutting portion is formed with a plurality of first engaging protrusions, and the damping washer is formed with a plurality of second engaging protrusions engaged with the first engaging protrusions, and the first engaging protrusions and the second engaging protrusions are arranged alternately and meshed with each other. Through the above improvement, when the abutting portion abuts against the damping washer, the first engaging protrusions and the second engaging protrusions are engaged alternately, thereby limiting the rotation of the damping washer.

[0016] Preferably, a guide column is formed in the housing, and the abutment portion is slidably arranged on the guide column. Through the above improvements, the abutment portion can be ejected more smoothly and the abutment portion can be prevented from rotating.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] By setting up an electromagnetic brake assembly through the ball head sleeve, when the car tailgate encounters resistance or interference during operation, the electromagnetic brake assembly will abut the damper assembly, making the screw assembly unable to rotate, thereby restricting the tailgate from continuing to move, avoiding injury to the user or damage to the objects, greatly improving the safety of the electric tailgate during operation, and compared with braking the motor, it will not cause damage to the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0021] Figure 3 For the utility model Figure 2 A partial enlarged view of the middle A;

[0022] Figure 4 It is a structural schematic diagram of the ball head cover and the electromagnetic brake assembly of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the electromagnetic brake assembly of the utility model;

[0024] Figure 6 It is a schematic diagram of the internal structure of the magnetic brake assembly of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the abutment portion of the utility model;

[0026] Figure 8 It is a structural schematic diagram of the damping gasket of the utility model;

[0027] In the figure: 1, screw assembly; 2, driving assembly; 3, ball head sleeve; 4, damper assembly; 5, electromagnetic brake assembly; 101, mounting shell; 102, fixing gasket; 103, damping gasket; 104, first elastic element; 201, housing; 202, abutment portion; 203, driving portion; 204, second elastic element; 205, current detection module; 206, connecting end; 301, support platform; 302, abutment convex portion; 303, first clamping convex portion; 304, second clamping convex portion; 305, guide column; 306, connecting column; 307, limit channel; DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0030] like Figure 1-8 As shown, a brushless electric support rod capable of emergency braking comprises a screw rod assembly 1 for driving the tailgate to move, and a driving assembly 2 for driving the screw rod assembly 1 to move.

[0031] Specifically, a ball head sleeve 3 is provided at the input end of the screw assembly 1, a damper assembly 4 is provided inside the ball head sleeve 3 and is transmission-connected to the screw assembly 1, and an electromagnetic brake assembly 5 is provided inside the ball head sleeve 3. The electromagnetic brake assembly 5 is restricted from rotating inside the ball head sleeve 3. When the action end of the electromagnetic brake assembly 5 extends out and abuts against the damper assembly 4, the action of the screw assembly 1 is restricted.

[0032] During the use of the tailgate, when the car tailgate encounters resistance or interference during operation, the electromagnetic brake assembly 5 will abut the damper assembly 4, preventing the screw assembly 1 from rotating, thereby limiting the tailgate from continuing to move, avoiding injury to the user or damage to objects, greatly improving the safety of the electric tailgate during operation, and compared with braking the motor, it will not cause damage to the motor.

[0033] As an example, whether the tailgate is subject to resistance or interference is detected by detecting the current of the motor, wherein the driving assembly 2 includes a motor for driving the screw assembly 1 to move.

[0034] like Figure 2 , Figure 3 As shown, further explanation of the implementation method of the damper assembly 4 in this embodiment, the damper assembly 4 is refined to include a mounting shell 101 fixed in the ball head sleeve 3, a fixed gasket 102 fixed in the shell, a damping gasket 103 rotated and arranged in the mounting shell 101, and a first elastic element 104 for driving the fixed gasket 102 and the damping gasket 103 to resist each other, the damping gasket 103 is connected to the screw assembly 1, and the damping gasket 103 and the fixed gasket 102 are alternately arranged, at least one of the damping gasket 103 and the fixed gasket 102 provides a friction surface, and the damping gasket 103 resists the electromagnetic brake assembly 5.

[0035] The screw assembly 1 has a connecting end 206 connected to the damper assembly 4, and teeth are formed on the connecting end 206. The damping gasket 103 is inserted into the connecting end and rotates with the screw assembly 1. The damping gasket 103 rotates with the screw assembly 1. When the damping gasket 103 is restricted from rotating, the screw cannot rotate, thereby preventing the car tailgate from moving further, thereby preventing the user from being injured.

[0036] Since the damping gasket 103 and the fixed gasket 102 are alternately arranged and rubbed, when the damping gasket 103 engages with the screw of the screw assembly 1, it can provide a holding force for the screw, so that the tailgate can be maintained at a certain angle, and when the electromagnetic brake assembly 5 abuts against the damping gasket 103, it will limit the rotation of the damping gasket 103, making it impossible for the screw to rotate, thereby avoiding further movement of the car tailgate and thus avoiding injury to the user.

[0037] like Figures 2 to 8 As shown, as a further explanation of the implementation method of the electromagnetic brake assembly 5 in this embodiment, the electromagnetic brake assembly 5 includes a shell 201, an abutting portion 202 for abutting the damping gasket 103, and a driving portion 203 for driving the abutting portion 202 to move, and a second elastic element 204 is arranged in the shell 201, one end of the second elastic element 204 abuts the shell 201, and the other end abuts the abutting portion 202, so that the abutting portion 202 always has a movement tendency toward the damping gasket 103.

[0038] Among them, the driving part 203 is an electromagnet, and the abutting part 202 is an armature. The driving part 203 can generate magnetism to adsorb the abutting part 202 when it is energized. The driving part 203 at least includes a power-on state and a power-off state. When the driving part 203 is in the power-on state, the abutting part 202 fits the driving part 203, and the abutting part 202 is away from the damping gasket 103. When the driving part 203 is in the power-off state, the second elastic element 204 drives the abutting part 202 away from the driving part 203 and forces the abutting part 202 to abut against the damping gasket 103.

[0039] Specifically, when the driving part 203 acts on the abutting part 202, the abutting part 202 overcomes the force of the second elastic element 204 and fits the driving part 203, so that the damping gasket 103 rotates normally. When the driving part 203 does not act on the abutting part 202, the second elastic element 204 will push the abutting part 202 out, so that the abutting part 202 abuts on the damping gasket 103 and restricts the damping gasket 103 from rotating, so that the screw assembly 1 cannot continue to move, ensuring the user's installation, achieving emergency braking of the screw assembly 1, and improving the safety of the vehicle tailgate.

[0040] In addition, a current detection module 205 for controlling the power on or off of the driving unit 203 is provided on the housing 201. The current detection module 205 can detect the current of the driving unit 203. When the tailgate encounters interference or obstruction, the current of the driving unit 203 will increase. When the current increases, the current detection module 205 will control the driving unit 203 to enter a power-off state, thereby pushing out the abutment portion 202 and limiting the screw assembly 1 from continuing to move, thereby preventing the vehicle tailgate from causing damage to the user.

[0041] Preferably, a plurality of first engaging protrusions 303 are formed at the end of the abutting portion 202, and a plurality of second engaging protrusions 304 engaged with the first engaging protrusions 303 are formed on the damping gasket 103. The first engaging protrusions 303 and the second engaging protrusions 304 are alternately arranged and meshed with each other. When the abutting portion 202 abuts against the damping gasket 103, the first engaging protrusions 303 and the second engaging protrusions 304 are alternately engaged, thereby limiting the rotation of the damping gasket 103 and improving the braking reliability.

[0042] like Figure 2 , Figure 3 , Figure 4 As shown, a further explanation of the implementation method of the shell 201 of the electromagnetic brake component 5 in this embodiment is that the peripheral side of the shell 201 abuts against the inside of the ball head sleeve 3, a support platform 301 is formed in the shell 201, and one end of the shell 201 abuts against the mounting shell 101, and the other end abuts against the support platform 301, and the shell 201 is fixed from the peripheral side and both ends respectively, thereby greatly improving the stability of the installation of the shell 201.

[0043] Furthermore, a guide post 305 is formed in the housing 201 , and the abutting portion 202 is slidably disposed on the guide post 305 , so that the abutting portion 202 can be ejected more smoothly and the abutting portion 202 can be prevented from rotating.

[0044] like Figure 4As shown, preferably, a connecting column 306 connected to the screw assembly 1 is formed in the ball head sleeve 3, and a limiting channel 307 for the connecting column 306 to pass through is formed in the outer shell 201. The connecting column 306 is connected to the action end of the screw assembly 1, so that the operation of the screw assembly 1 is updated and stable. The connecting column 306 is placed in the limiting channel 307, which further saves internal space and further limits the rotation of the outer shell 201.

[0045] like Figure 2 , Figure 3 As shown, as a further explanation of the cooperation between the housing 201 and the damper assembly 4, an abutting protrusion 302 abutting against the first elastic element 104 is formed on the housing 201. One end of the first elastic element 104 abuts against the abutting protrusion 302, and the other end abuts against the damping gasket 103, so that the first elastic element 104 applies pressure to the damping gasket 103, increasing the friction between the damping gasket 103 and the fixed gasket 102, thereby improving the holding force of the support rod, so that the tailgate of the car can be maintained at a certain angle.

[0046] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A brushless electric strut with emergency braking function. It is characterized in that It comprises a screw rod assembly (1) for driving the tailgate to move, and a driving assembly (2) for driving the screw rod assembly (1) to move; The input end of the screw assembly (1) is provided with a ball sleeve (3), a damper assembly (4) in transmission connection with the screw assembly (1) is provided inside the ball sleeve (3), and an electromagnetic brake assembly (5) is provided inside the ball sleeve (3), the electromagnetic brake assembly (5) is restricted from rotating inside the ball sleeve (3), and the action end of the electromagnetic brake assembly (5) extends out and abuts against the damper assembly (4) to restrict the action of the screw assembly (1).

2. A brushless electric strut capable of emergency braking according to claim 1, It is characterized in that The damper assembly (4) comprises a mounting shell (101) fixed in the ball head sleeve (3), a fixed gasket (102) fixed in the shell, a damping gasket (103) rotated and arranged in the mounting shell (101), and a first elastic element (104) for driving the fixed gasket (102) and the damping gasket (103) to abut against each other, the damping gasket (103) is connected to the screw assembly (1), and the damping gasket (103) and the fixed gasket (102) are alternately arranged, at least one of the damping gasket (103) and the fixed gasket (102) provides a friction surface, and the damping gasket (103) abuts against the electromagnetic brake assembly (5).

3. A brushless electric strut capable of emergency braking according to claim 2, It is characterized in that The screw assembly (1) has a connecting end (206) connected to the damper assembly (4), and teeth are formed on the connecting end (206). The damping gasket (103) is inserted into the connecting end (206) and rotates together with the screw assembly (1).

4. A brushless electric strut capable of emergency braking according to claim 2, It is characterized in that The electromagnetic brake assembly (5) comprises a housing (201), an abutting portion (202) for abutting against a damping pad (103), and a driving portion (203) for driving the abutting portion (202) to move, and a second elastic element (204) is arranged in the housing (201), one end of the second elastic element (204) abuts against the housing (201), and the other end abuts against the abutting portion (202), so that the abutting portion (202) always has a movement tendency toward the damping pad (103).

5. A brushless electric strut capable of emergency braking according to claim 4, It is characterized in that The driving part (203) at least includes a power-on state and a power-off state. When the driving part (203) is in the power-on state, the abutting part (202) is in contact with the driving part (203), and the abutting part (202) is away from the damping gasket (103). When the driving part (203) is in the power-off state, the second elastic element (204) drives the abutting part (202) away from the driving part (203), and forces the abutting part (202) to abut against the damping gasket (103).

6. A brushless electric strut capable of emergency braking according to claim 4, It is characterized in that The housing (201) is provided with a current detection module (205) for controlling the driving unit (203) to be powered on or off.

7. A brushless electric strut capable of emergency braking according to claim 4, It is characterized in that The outer shell (201) is in contact with the inside of the ball head cover (3) on its circumferential side. A support platform (301) is formed inside the outer shell (201). One end of the outer shell (201) is in contact with the mounting shell (101), and the other end is in contact with the support platform (301).

8. A brushless electric strut capable of emergency braking according to claim 4, It is characterized in that The housing (201) is formed with a contact convex portion (302) contacting the first elastic element (104); one end of the first elastic element (104) contacting the contact convex portion (302) and the other end contacting the damping gasket (103).

9. A brushless electric strut capable of emergency braking according to claim 4, It is characterized in that A plurality of first clamping protrusions (303) are formed at the end of the abutting portion (202), and a plurality of second clamping protrusions (304) clamped with the first clamping protrusions (303) are formed on the damping gasket (103), wherein the first clamping protrusions (303) and the second clamping protrusions (304) are arranged alternately and mesh with each other.

10. A brushless electric strut capable of emergency braking according to claim 4, It is characterized in that A guide column (305) is formed in the housing (201), and the abutment portion (202) is slidably disposed on the guide column (305).

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