A door structure with adjustable rebound force

Abstract

This invention discloses a door structure with adjustable rebound force, relating to the field of vehicle parts technology. It includes a chassis, which is fixedly mounted on a vehicle frame. A bottom turntable is rotatably connected to the chassis, and a second end of a multi-layer spring mechanism is fixed on the bottom turntable. The first end of the multi-layer spring mechanism is fixedly mounted on a top plate via a spring selection component. The top plate is fixedly mounted on the door. A pre-torsion component is mounted on the chassis, and an outer cylinder is also fixed to the chassis. A rotating inner cylinder is rotatably connected to the outer cylinder, and the top plate is fixed on the rotating inner cylinder. The spring selection component adjusts the door's rebound force by changing the number of torsion springs in the multi-layer spring mechanism fixed on the top plate. The pre-torsion component applies torque to the multi-layer spring mechanism in advance via a motor drive to increase the door's rebound force.

Description

Technical Field

[0001] This invention relates to the field of vehicle parts technology, and in particular to a door structure with adjustable rebound force. Background Technology

[0002] A door opening limiter is a device that restricts the degree to which a car door opens. It prevents the door from opening too wide by limiting the maximum angle it can open, and it also prevents the door from automatically closing due to disturbances when a certain angle of opening is required. A typical door opening limiter has a limiting function when the door is opened to a specific angle and can control the door's rebound force. However, the rebound force of a typical door opening limiter cannot be adjusted. This means that if the rebound force of the door opening limiter is too high, elderly people or children may have difficulty opening the door, while if the rebound force is too low, it requires force to close the door tightly.

[0003] Chinese invention patent CN112360258B discloses a door limiter, including a limit box, which is fixedly installed on the door. The limit box and the limit arm slide together. The first end of the limit arm is fixedly installed in the groove of the door, and the second end of the limit arm is rotatably connected to the vehicle frame. The limit arm is provided with a rack, which meshes with a gear. The gear is fixedly installed on the output shaft of a motor. The motor is fixedly installed on a bracket. The motor drives the bracket to slide along the limit arm to limit the relative sliding between the limit box and the limit arm, so that the limit box is fixed at any position on the limit arm, thereby enabling the door to remain open at any angle. However, this prior art still cannot effectively adjust the door rebound force. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention discloses a door structure with adjustable rebound force, comprising a door, a top plate fixed to the door, a spring selection assembly fixed to the top plate, the spring selection assembly fixing the first end of a spring selected from a multi-layer spring mechanism, the second ends of the springs in the multi-layer spring mechanism being fixedly mounted on a bottom turntable, a pre-torsion assembly fixed to the bottom turntable, the top plate fixedly mounted on a rotating inner cylinder, the rotating inner cylinder being rotatably connected to an outer cylinder, the outer cylinder being fixedly mounted on the bottom turntable, the bottom turntable being rotatably connected to a chassis, and the chassis being fixedly mounted on the vehicle frame.

[0005] Furthermore, the spring selection assembly includes an inner lower insert block, which is slidably connected to the top plate. The first end of an inner compression spring is fixed on the inner lower insert block, and the second end of the inner compression spring is fixedly installed on the top plate. A central lower insert block and an outer lower insert block are slidably connected to the top plate. The first end of a central compression spring is fixed on the central lower insert block, and the second end of the central compression spring is fixedly installed on the top plate. The first end of an outer compression spring is fixed on the outer lower insert block, and the second end of the outer compression spring is fixedly installed on the top plate. The spring selection assembly also includes an electric cylinder, which is fixedly installed on the top plate. A push block is fixed on the cylinder arm of the electric cylinder. The push block abuts against the inner lower insert block. An inner torsion spring is fixed on the inner lower insert block. When the electric cylinder drives the push block to slide until it is close to the central lower insert block and the outer lower insert block, the push block causes the central lower insert block and the outer lower insert block to slide downwards to fix the central torsion spring and the inner torsion spring.

[0006] Furthermore, the spring selection assembly also includes a top frame, which is fixedly mounted on the top plate. A sliding member is slidably connected to the top frame, and the first ends of baffle spring I and baffle spring II are fixed on the sliding member. The second ends of baffle spring I and baffle spring II are fixedly mounted on baffle I and baffle II. Baffle I and baffle II are located directly above the central lower insert block and the outer lower insert block and are slidably connected to sliding shaft II and sliding shaft I. Sliding shaft II and sliding shaft I pass through the sliding member and are fixedly mounted on the top frame.

[0007] Furthermore, the top frame has a first end of a central spring fixed on it, and the second end of the central spring is fixedly installed on the sliding member. When the sliding member is close to the docking block, the sliding member slides upward, and the docking block is fixedly installed on the chassis.

[0008] Furthermore, the pre-torsion assembly includes a slider that is slidably connected to the chassis. A motor is fixed to the first end of the slider, and a drive gear is fixed to the output shaft of the motor. A locking block is fixed to the second end of the slider, and the locking block meshes with a driven gear. The driven gear is fixedly mounted on the bottom turntable. When the slider is close to the door docking block, the slider slides until the drive gear meshes with the driven gear, and the door docking block is fixedly mounted on the door.

[0009] Furthermore, a first end of a reset spring is fixed on the slider, and a second end of the reset spring is fixedly mounted on a fixed block, which is then fixedly mounted on the chassis.

[0010] Furthermore, the bottom turntable has multiple fixing rods, and the second end of a multi-layer spring mechanism is fixed on the multiple fixing rods. The first end of the multi-layer spring mechanism has multiple circular straight holes, and the outer lower insertion block, the center lower insertion block, and the inner lower insertion block slide on the circular straight holes.

[0011] Furthermore, the rotating inner cylinder is provided with multiple guide rings, which are slidably connected to multiple rectangular grooves on the outer cylinder.

[0012] Furthermore, the outer cylinder has multiple irregularly shaped grooves, and a first end of a limiting spring is fixed on the groove. A locking ball is fixed on the second end of the limiting spring, and the locking ball is locked in a hemispherical groove on the rotating inner cylinder.

[0013] The beneficial effects of this invention compared with the prior art are: (1) The spring selection component of this invention adjusts the rebound force by changing the number of torsion springs in the multi-layer spring mechanism, so that the user only needs to use a small amount of force to make the car door close automatically, while preventing the car door from being difficult to open due to excessive rebound force, and making it convenient for the user to adjust the rebound force according to their own needs; (2) The pre-torsion component of this invention, driven by a motor, drives the bottom turntable to rotate before the car door is opened, so that the multi-layer spring mechanism undergoes torsional deformation, and the rebound force is adjusted by the degree of torsional deformation, which can more precisely adjust the rebound force of the car door to meet the needs of different groups of people; (3) The spring selection component of this invention, through (3) The push block continues to slide forward through the baffle I and baffle II to prevent the electric cylinder from suddenly increasing the rebound force due to malfunction and causing risk to the user; (4) The pre-torsion component of the present invention restricts the rotation of the driven gear by the locking block to prevent the rebound force from changing during the opening of the car door and causing inconvenience to the user; (5) When the car door and the top plate of the present invention rotate, the bottom plate is relatively stationary, which causes the torsion spring in the multi-layer spring mechanism to deform elastically, and the automatic rebound of the car door is achieved by releasing the energy of the torsion spring; (6) The present invention restricts the rotation of the inner cylinder on the outer cylinder by the limiting component, so that the car door maintains a certain opening degree and prevents the car door from being disturbed in windy weather, thereby causing damage to the device or the car body. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the spring selection component of the present invention.

[0016] Figure 3 This is a schematic diagram of some parts of the spring selection assembly of the present invention.

[0017] Figure 4 This is a schematic diagram of some parts of the pre-torsion assembly of the present invention.

[0018] Figure 5 This is a left view of the pre-torsion component of the present invention.

[0019] Figure 6 This is a schematic diagram of the outer cylinder and rotating inner cylinder structure of the present invention.

[0020] Figure 7 for Figure 6 Cross-sectional view at point AA.

[0021] Figure 8 This is a schematic diagram of the limiting component of the present invention.

[0022] Figure 9 This is a schematic diagram of the internal structure of the outer cylinder of the present invention.

[0023] Reference numerals: 1-Spring selection assembly; 2-Pre-torsion assembly; 3-Multi-layer spring mechanism; 4-Limiting assembly; 5-Door; 6-Top plate; 7-Chassis; 8-Outer cylinder; 9-Rotating inner cylinder; 10-Bottom turntable; 11-Guide ring; 101-Connecting block; 102-Top bracket; 103-Outer lower insert block; 104-Center lower insert block; 105-Inner lower insert block; 106-Baffle I; 107-Baffle II; 108-Sliding component; 109-Center spring; 110-Baffle spring I; 111-Baffle spring II; 1 12-Inner compression spring; 113-Center compression spring; 114-Outer compression spring; 115-Push block; 116-Electric cylinder; 117-Slide shaft I; 118-Slide shaft II; 201-Motor; 202-Driving gear; 203-Slider; 204-Door docking block; 205-Clamping block; 206-Driven gear; 207-Reset spring; 208-Fixing block; 301-Outer torsion spring; 302-Center torsion spring; 303-Inner torsion spring; 401-Limiting spring; 402-Clamping ball. Detailed Implementation

[0024] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Example: A door structure with adjustable rebound force includes a chassis 7, which is fixedly mounted on a vehicle frame. A bottom turntable 10 is rotatably connected to the chassis 7. The second end of a multi-layer spring mechanism 3 is fixed on the bottom turntable 10. The first end of the multi-layer spring mechanism 3 is fixedly mounted on a top plate 6 via a spring selection component 1. The spring selection component 1 adjusts the rebound force of the door by changing the number of torsion springs in the multi-layer spring mechanism 3 fixed on the top plate 6. A door 5 is fixed on the top plate 6. A pre-torsion component 2 is mounted on the chassis 7. The pre-torsion component 2 applies torque to the multi-layer spring mechanism 3 in advance by the drive of a motor 201 to increase the rebound force of the door. An outer cylinder 8 is also fixed on the chassis 7. A rotating inner cylinder 9 is rotatably connected to the outer cylinder 8. The top plate 6 is fixed on the rotating inner cylinder 9.

[0026] The spring selection assembly 1 includes an electric cylinder 116, with a push block 115 mounted on the cylinder arm of the electric cylinder 116. The push block 115 causes the inner lower insertion block 105 to slide downwards until the first end of the inner torsion spring 303 is fixed to one end of the inner lower insertion block 105. The first end of the inner compression spring 112 is fixed to the inner lower insertion block 105, and the second end of the inner compression spring 112 is fixedly mounted on the top plate 6. A top frame 102 is fixed to the top plate 6, and a sliding member 108 is slidably connected to the top frame 102. A central spring 109 is fixed to the sliding member 108. At the second end, the first end of the central spring 109 is fixedly mounted on the top frame 102. A sliding shaft I 117 is fixedly mounted on the top frame 102. A baffle II 107 is slidably connected to the sliding shaft I 117. The second end of the baffle spring II 111 is fixedly mounted on the baffle II 107. The first end of the baffle spring II 111 is fixedly mounted on the sliding member 108. The baffle II 107 is located directly above the central lower insertion block 104, preventing the push block 115 from sliding forward. The central lower insertion block 104 is fixedly mounted on the top plate 6. A central compression device is fixedly mounted on the central lower insertion block 104. The first end of spring 113 and the second end of the central compression spring 113 are fixedly mounted on the top plate 6. A sliding shaft II 118 is also fixedly mounted on the top frame 102. A baffle I 106 is slidably connected to the sliding shaft II 118. The second end of a baffle spring I 110 is fixedly mounted on the baffle I 106. The first end of the baffle spring I 110 is fixedly mounted on the sliding member 108. The baffle I 106 is located directly above the outer lower insertion block 103, restricting the push block 115 from sliding forward. The outer lower insertion block 103 is fixedly mounted on the top plate 6. The first end of the outer compression spring 114 is fixed, and the second end of the outer compression spring 114 is fixedly installed on the top plate 6. The bottom plate 7 is equipped with a docking block 101. When the docking block 101 is close to the sliding member 108, the sliding member 108 is lifted up, which drives the baffle I 106 and the baffle II 107 to slide upward together, releasing the obstruction of the push block 115. The push block 115 continues to slide forward, causing the center lower insertion block 104 and the outer lower insertion block 103 to slide downward to the first end of the fixed center torsion spring 302 and the inner torsion spring 303.

[0027] The pre-torsion assembly 2 includes a slider 203, which is slidably connected to the chassis 7. A motor 201 is fixed on the slider 203, and a drive gear 202 is mounted on the output shaft of the motor 201. A locking block 205 is also fixed on the slider 203, and the locking block 205 meshes with a driven gear 206. The driven gear 206 is fixedly mounted on the bottom turntable 10. A door docking block 204 is mounted on the door 5. When the door docking block 204 is close to the slider 203, it pushes the slider 203 to slide away from the door 5. The driven gear 206 meshes with the drive gear 202, and the motor 201 drives the drive gear 202 to rotate, which in turn drives the driven gear 206 to rotate. The first end of a return spring 207 is also fixed on the slider 203, and the second end of the return spring 207 is fixedly mounted on a fixing block 208. The fixing block 208 is fixedly mounted on the chassis 7.

[0028] The multi-layer spring mechanism 3 includes an outer torsion spring 301, a central torsion spring 302, and an inner torsion spring 303. The second ends of the outer torsion spring 301, the central torsion spring 302, and the inner torsion spring 303 are all fixedly mounted on the bottom turntable 10. The first end of the outer torsion spring 301 is slidably connected to an outer lower insertion block 103. The first end of the central torsion spring 302 is slidably connected to a central lower insertion block 104. The first end of the inner torsion spring 303 is slidably connected to an inner lower insertion block 105.

[0029] The limiting component 4 includes a limiting spring 401, which is arranged in three rows with ten springs in each row. The first end of each limiting spring 401 is fixedly installed in a groove on the inner wall of the outer cylinder 8. The second end of each locking ball 402 is fixed with a locking ball 402. The locking balls 402 are locked in hemispherical grooves on the rotating inner cylinder 9. The hemispherical grooves are arranged in one row on one end of the rotating inner cylinder 9 with ten balls in each row.

[0030] The outer cylinder 8 has three rectangular sliding grooves on its inner wall, and each groove is slidably connected to a guide ring 11. The guide ring 11 is fixedly installed on the rotating inner cylinder 9. There are three guide rings 11, which are evenly distributed at one end of the rotating inner cylinder 9.

[0031] The bottom turntable 10 is equipped with six fixing rods, with two fixing rods forming a group. The outermost group of fixing rods is fixed with the second end of the outer torsion spring 301, the middle group of fixing rods is fixed with the second end of the center torsion spring 302, and the innermost group of fixing rods is fixed with the second end of the inner torsion spring 303.

[0032] Working principle: During normal use, the top plate 6 fixes the first end of the inner torsion spring 303 through the inner lower insert 105, and the second end of the inner torsion spring 303 is fixedly installed on the bottom turntable 10. The top plate 6 rotates as the door 5 is opened. Since the bottom turntable 10 is stationary relative to the chassis 7 fixed on the vehicle frame, the inner torsion spring 303 is torsional deformed. When the pushing force of the hand on the door 5 disappears, the inner torsion spring 303 returns to its original shape, driving the door 5 to rotate to close.

[0033] When the door 5 needs to maintain a certain opening angle, the door 5 opens and drives the top plate 6 to rotate, and the inner cylinder 9 rotates along with it. The guide ring 11 fixed on the inner cylinder 9 slides in the rectangular groove on the inner wall of the outer cylinder 8. When the door 5 rotates to the designated position, the limit spring 401 pops out and locks the ball 402 into the hemispherical groove on the inner cylinder 9. The inner cylinder 9 stops rotating, so that the door 5 maintains a certain opening. At this time, the door 5 needs to be pushed by hand to make the door 5 continue to rotate or close.

[0034] When the rebound force needs to be adjusted, the first method is adopted. When the door 5 is closed, the sliding member 108 is lifted by the docking block 101, so that the central spring 109 is in a compressed state. The baffle I 106 and baffle II 107 slide upward, and the baffle springs I 110 and baffle spring II 111 are in a stretched state. The electric cylinder 116 is activated, and the electric cylinder 116 drives the push block 115 to slide forward. The push block 115 presses down the central lower insert block 104 until one end of the central lower insert block 104 fixes the first end of the central torsion spring 302. At this time, the device uses two torsion springs, and the rebound force increases. The push block 115 continues to slide forward, pressing down the outer lower insert block 103 until one end fixes the outer torsion spring. At the first end of spring 301, the device uses three torsion springs, and the rebound force increases again. After the door 5 is opened, the sliding member 108 rotates with the door 5 and no longer contacts the docking block 101. The central spring 109 is released from compression and returns to its original state, driving the sliding member 108 to slide downward, which in turn drives the baffle I 106 and baffle II 107 to slide downward. If the push block 115 is located above the central lower insert block 104 at this time, the baffle II 107 presses on the push block 115, and the central compression spring 113 is in a compressed state, which plays a fastening role on the push block 115. The baffle I 106 slides to the upper part of the outer lower insert block 103, blocking the push block 115 in front of it and restricting the push block 115 from continuing to slide forward.

[0035] When the rebound force needs to be adjusted, the second method is adopted. When the door 5 is closed, the door docking block 204 fixed on the door 5 is pressed against the slider 203, causing the slider 203 to slide away from the door 5 on the chassis 7. When the slider slides until the driving gear 202 meshes with the driven gear 206, the return spring 207 is in a compressed state. The motor 201 starts and drives the driving gear 202 to rotate, which in turn drives the driven gear 206 to rotate, thereby causing the bottom turntable 10 to rotate together. Since the rotating inner cylinder 9 is stationary relative to the door 5, the multi-layer spring mechanism 3 undergoes torsional deformation, increasing the rebound force. After the door 5 is opened, the door docking block 204 rotates with the door 5 and no longer contacts the slider 203. The return spring 207 is released from the compressed state, driving the slider 203 to slide closer to the door 5 on the chassis 7, causing the driven gear 206 to mesh with the locking block 205, which restricts the rotation of the driven gear 206 and keeps the bottom turntable 10 stationary.

Claims

1. A door structure with adjustable rebound force, comprising a door (5), characterized in that: A top plate (6) is fixed on the door (5), and a spring selection assembly (1) is fixed on the top plate (6). The spring selection assembly (1) fixes the first end of the spring selected from the multi-layer spring mechanism (3). The second ends of the multi-layer spring mechanism (3) are all fixed on the bottom turntable (10). A pre-torsion assembly (2) is fixed on the bottom turntable (10). The top plate (6) is fixed on the rotating inner cylinder (9). The rotating inner cylinder (9) is rotatably connected to the outer cylinder (8). The outer cylinder (8) is fixed on the bottom turntable (10). The bottom turntable (10) is rotatably connected to the chassis (7). The chassis (7) is fixed on the vehicle frame. The spring selection assembly (1) includes at least one lower insert block and a drive member. The lower insert block is used to be detachably fixed to the first end of the corresponding torsion spring in the multi-layer spring mechanism (3). The multi-layer spring mechanism (3) includes at least two independent torsion springs. The drive member is used to drive the lower insert block to slide to select the target torsion spring. The spring selection assembly (1) also includes a slider (108). A docking block (101) is fixed on the chassis (7). The drive member can only drive the lower insert block to move when the door (5) is closed and the slider (108) is close to the docking block (101). The pre-torsion assembly (2) includes a motor (201), a drive gear (202), a driven gear (206), a slider (203), and a locking block (205). The driven gear (206) is fixed to the bottom turntable (10), the drive gear (202) is fixed to the output shaft of the motor (201), the motor (201) is fixed to the slider (203), and a door docking block (204) is fixed on the door (5). Only when the door (5) is closed and the door docking block (204) pushes the slider (203) to make the drive gear (202) mesh with the driven gear (206), the motor (201) drives the bottom turntable (10) to rotate to pre-torsion the multi-layer spring mechanism (3). After the door (5) is opened, the slider (203) is reset, and the locking block (205) meshes with the driven gear (206) to restrict its rotation.

2. The adjustable rebound force door structure as described in claim 1, characterized in that: The spring selection assembly (1) includes an inner lower insert block (105), which is slidably connected to the top plate (6). The inner lower insert block (105) has a first end fixed to it, and the second end of the inner compression spring (112) is fixedly mounted on the top plate (6). The top plate (6) has a central lower insert block (104) and an outer lower insert block (103) slidably connected to it. The central lower insert block (104) has a first end fixed to it, and the second end of the central compression spring (113) is fixedly mounted on the top plate (6). The outer lower insert block (103) has a first end fixed to it, and the second end of the outer compression spring (114) is fixed to it. The second end of 14) is fixedly installed on the top plate (6). The spring selection assembly (1) also includes an electric cylinder (116). The electric cylinder (116) is fixedly installed on the top plate (6). A push block (115) is fixed on the cylinder arm of the electric cylinder (116). The push block (115) abuts against the inner lower insertion block (105). An inner torsion spring (303) is fixed on the inner lower insertion block (105). When the electric cylinder (116) drives the push block (115) to slide to close to the center lower insertion block (104) and the outer lower insertion block (103), the push block (115) causes the center lower insertion block (104) and the outer lower insertion block (103) to slide downward to the center torsion spring (302) and the outer torsion spring (301) fixed thereon.

3. The adjustable rebound force door structure as described in claim 2, characterized in that: The spring selection assembly (1) further includes a top frame (102), which is fixedly mounted on the top plate (6). A sliding member (108) is slidably connected to the top frame (102). The first ends of baffle spring I (110) and baffle spring II (111) are fixed on the sliding member (108). The second ends of baffle spring I (110) and baffle spring II (111) are fixedly mounted on baffle I (106) and baffle II (107). Baffle I (106) and baffle II (107) are located directly above the central lower insert block (104) and the outer lower insert block (103) and are slidably connected to sliding shaft II (118) and sliding shaft I (117). Sliding shaft II (118) and sliding shaft I (117) pass through the sliding member (108) and are fixedly mounted on the top frame (102).

4. The adjustable rebound force door structure as described in claim 3, characterized in that: The top frame (102) has a first end of a central spring (109) fixed on it, and the second end of the central spring (109) is fixedly installed on a sliding member (108). When the sliding member (108) is close to the docking block (101), the sliding member (108) slides upward, and the docking block (101) is fixedly installed on the chassis (7).

5. The adjustable rebound force door structure as described in claim 4, characterized in that: The pre-torsion assembly (2) includes a slider (203), which is slidably connected to the chassis (7). A motor (201) is fixed on the first end of the slider (203), and a drive gear (202) is fixed on the output shaft of the motor (201). A locking block (205) is fixed on the second end of the slider (203), and the locking block (205) meshes with the driven gear (206). The driven gear (206) is fixedly installed on the bottom turntable (10). When the slider (203) is close to the door docking block (204), the slider (203) slides until the drive gear (202) meshes with the driven gear (206). The door docking block (204) is fixedly installed on the door (5).

6. The adjustable rebound force door structure as described in claim 5, characterized in that: The first end of the reset spring (207) is fixed on the slider (203), and the second end of the reset spring (207) is fixedly installed on the fixing block (208). The fixing block (208) is fixedly installed on the chassis (7).

7. The adjustable rebound force door structure as described in claim 6, characterized in that: The bottom turntable (10) has multiple fixed rods, and the second end of the multi-layer spring mechanism (3) is fixed on the multiple fixed rods. The first end of the multi-layer spring mechanism (3) has multiple circular straight holes, and the outer lower insert block (103), the center lower insert block (104), and the inner lower insert block (105) slide on the circular straight holes.

8. The adjustable rebound force door structure as described in claim 7, characterized in that: The rotating inner cylinder (9) is provided with multiple guide rings (11), which are slidably connected to multiple rectangular grooves on the outer cylinder (8).

9. The adjustable rebound force door structure as described in claim 8, characterized in that: The outer cylinder (8) has multiple irregular grooves, and the first end of a limiting spring (401) is fixed on the groove. The second end of the limiting spring (401) is fixed with a locking ball (402), which is locked in a hemispherical groove on the rotating inner cylinder (9).

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