CN110924772B

CN110924772B - Automobile door limiter

Info

Publication number: CN110924772B
Application number: CN201911241161.9A
Authority: CN
Inventors: 李永建; 李水兰; 李宇钢
Original assignee: Hangzhou Fuyang Xinyuan New Energy Co Ltd
Current assignee: Guangdong Ruilin Intelligent Technology Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2021-04-30
Anticipated expiration: 2039-12-06
Also published as: CN110924772A

Abstract

The invention belongs to the technical field of vehicle door limiters, and particularly relates to a vehicle door limiter which comprises a mounting bracket fixed on a vehicle body, a limiting box fixed on a vehicle door, a rubber buffer block providing buffering force, a limiting arm and a clamping mechanism.

Description

Automobile door limiter

Technical Field

The invention belongs to the technical field of automobile door limiters, and particularly relates to an automobile door limiter.

Background

At present, when the vehicle is manufactured, a vehicle door limiter, a rubber spring type limiter and a torsion spring type limiter are installed on a vehicle door, and the vehicle door limiter generally has the functions of the following two aspects: the automobile door limiting device is characterized in that 2-3 arc-shaped belts are arranged on a limiting stopper arm rod, so that a switch gear is formed at a node of each arc-shaped belt and the corresponding arc-shaped belt, and 2-3 positioning points are arranged on an automobile door in the opening and closing process; and secondly, the automobile door can be guaranteed to be stopped at a certain position when the automobile is on a specified ramp, and the automobile door can be prevented from being opened and closed automatically. The structure has the advantages of simple structure, low cost, small occupied space and no maintenance; the disadvantage is that after a period of operation, the limiting torque decreases rapidly.

For the rubber spring type limiter, the door limiter with the structure generally has two gears or three gears, the maximum moment of the door limiter is about 35N.m, the length of the door limiter is about 60mm, the maximum opening angle is below 70 degrees, and after a durability test, the torque change is about 30-40%; however, the loss of the limiting force is large, and after the automobile limiting device is used for a long time, the elastic force of the spring or the rubber is weakened, so that the integral service performance of the automobile is affected. The invention reduces the influence on the normal use of the vehicle caused by the weakening of the elastic force of the spring or the rubber after long-time use by adjusting the size of the deformable amount of the spring.

The invention designs an automobile door limiter to solve the problems.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention discloses a car door limiter which is realized by adopting the following technical scheme.

A car door stopper comprises a mounting bracket fixed on a car body, a limiting box fixed on a car door, a rubber buffer block providing buffering force, a limiting arm and a clamping mechanism, wherein the upper end surface and the lower end surface of the limiting arm are respectively provided with two limiting bulges distributed along the length direction of the limiting arm; the limiting arm penetrates through the limiting box and is matched with a clamping mechanism arranged in the limiting box; the method is characterized in that: the lower ends of two limiting bulges positioned on the lower end surface of the limiting arm in the four limiting bulges arranged on the limiting arm are respectively provided with a limiting plane.

The door stopper designed by the invention is a spring type stopper, and the conventional spring type stopper ensures that the limiting box can move along the limiting arm when the door is opened. Because the limit arm is provided with structures with different heights, the compression spring has different elastic deformations, so that people need to close the door with different forces when opening the door. The vehicle door can be limited at each limit position point. The rubber buffer block has a buffer effect on the vehicle door.

The clamping mechanism comprises rollers, mounting plates, mounting frames and compression springs, wherein the two mounting plates are arranged in the limiting box in a vertically sliding fit manner, the rollers are arranged on the mounting frames in a rotating fit manner, and the two mounting frames are respectively arranged on the two mounting plates in a one-to-one correspondence manner through the two compression springs; the two rollers are in rolling extrusion fit with the limiting arm; a first rack and a second rack are further installed in the limiting box through sliding fit, the roller on the upper side of the two rollers is pressed to move upwards to control the first rack to move through a transmission mechanism, and the roller on the lower side is pressed to move downwards to control the second rack to move through the transmission mechanism; the side face of one end of the limiting arm, which is provided with the rubber buffer block, is also provided with an extrusion block which plays an extrusion role on the first rack and the second rack, the extrusion block extrudes the first rack and the second rack to move, and the first rack and the second rack move to control the pre-pressing degree of the compression spring through the adjusting mechanism.

When the door is opened, the upper roller and the lower roller slide relative to the limiting arm, when the upper roller and the lower roller are in contact fit with the area of the limiting arm without the limiting bulge, the upper roller and the lower roller are tightly pressed on the limiting arm under the pre-pressure of the two compression springs, and when the upper roller and the lower roller are in contact fit with the limiting bulge on the limiting arm, the limiting bulge can extrude the upper roller and the lower roller, so that the upper roller and the lower roller further extrude the compression springs, and the resistance for opening the door is relatively increased. After the upper and lower rollers roll between the two limiting protrusions, if the upper and lower rollers want to roll continuously, the extrusion force applied to the two rollers by the limiting protrusions needs to be overcome, so that a switch gear is formed at the joint of the two limiting protrusions through the two groups of limiting protrusions, and the vehicle door has positioning points in the opening and closing process.

As a further improvement of the technology, the transmission mechanism comprises a connecting block, a fourth rack, a first gear, a second gear, a third rack and a fifth gear, wherein one end of each of the two mounting plates, which is far away from the corresponding roller, is provided with one connecting block, one end of the fourth rack is fixedly arranged on the connecting block positioned on the upper side of the two connecting blocks, the first gear is rotatably arranged in the limiting box, and the first gear is meshed with the fourth rack and the first rack respectively; one end of the third rack is fixedly arranged on the connecting block positioned on the lower side in the two connecting blocks, the fifth gear is rotatably arranged in the limiting box, and the fifth gear is respectively meshed with the third rack and the second rack.

The limiting box is provided with an insertion hole for the limiting arm to pass through, and one side of the limiting box facing the rubber buffer block is provided with two adjusting holes for the first rack and the second rack to penetrate through.

As a further improvement of the technology, the adjusting mechanism comprises a sixth rack, a seventh rack, a third gear, a guide rail shell, a sliding block, a connecting rod, a friction limiting sleeve, a guide block, an installation rotating shaft, a limiting plate and a friction disc, wherein the limiting plate is installed in the limiting box in a vertically sliding fit mode.

Two guide grooves are symmetrically formed in the upper end face and the lower end face in the guide rail shell, a first through square opening is formed in each of the inner end faces of the two guide grooves, a second square opening is formed in one side face in the guide rail shell, a third square opening is formed in the other side face in the guide rail shell, and the guide rail shell is fixedly installed in the limiting box; two guide blocks are symmetrically arranged on two end faces of the upper end of the sliding block, the sliding block is arranged in the guide rail shell through the sliding fit of the two guide blocks in the two guide grooves, and the sliding block is in one-way sliding fit with the guide rail shell; one end of the installation rotating shaft is provided with a limiting disc, the installation rotating shaft is installed on the sliding block in a rotating fit mode, one end of the installation rotating shaft, which is provided with the limiting disc, penetrates through a third square opening in the guide rail shell and is located on the outer side of the guide rail shell, and the other end of the installation rotating shaft penetrates through a second square opening in the guide rail shell and is located on the outer side of the guide rail shell; one end of the friction limiting sleeve is provided with a friction disc, the friction limiting sleeve is arranged on the installation rotating shaft through the sliding fit of the sliding block and the sliding groove, and the friction limiting sleeve is in sliding fit with the limiting disc; the second gear is fixedly arranged at one end of the mounting rotating shaft, which is not provided with the limiting disc, and is respectively meshed with the first rack and the second rack, and the first rack and the second rack are respectively positioned at the upper side and the lower side of the second gear; one end of the connecting rod passes through a first square opening formed in the upper end face of the guide rail shell and is fixedly connected with the sliding block; the other end of the connecting rod is fixedly installed on the seventh rack, one end of the sixth rack is fixedly installed on the limiting plate, the third gear is rotatably installed in the limiting box, and the third gear is meshed with the seventh rack and the sixth rack respectively.

A trigger plate for extruding a friction limiting sleeve is arranged on the side surface of one end of the limiting arm, which is provided with the rubber buffer block; the limiting plate is in contact fit with the mounting plate located on the upper side.

According to the trigger plate designed by the invention, in the process that the limiting box moves relative to the limiting arm, before the limiting box is contacted with the rubber buffer block, the trigger plate is firstly contacted with the friction limiting sleeve, and the friction limiting sleeve is extruded by the trigger plate, so that the friction limiting sleeve and the sliding block are in friction limiting, and the second gear is limited to rotate.

As a further improvement of the technology, the lower end of the sliding block is fixedly provided with an eighth rack through a connecting block, and the connecting block penetrates through a first square opening formed in the lower end face of the guide rail shell; one end of the supporting shaft is fixedly arranged in the limiting box, the fourth gear is arranged on the supporting shaft through the one-way clutch, and the fourth gear is meshed with the eighth rack; the movement of the sliding block is made to be one-way sliding through the one-way clutch.

As a further improvement of the technology, two telescopic rods are respectively arranged between the two mounting plates and the corresponding mounting frames, and the two telescopic rods are respectively nested in the two corresponding compression springs; the mounting plate and the corresponding roller are guided by the telescopic rods.

Compared with the traditional vehicle door limiter technology, the vehicle door limiter has the following beneficial effects:

1. according to the designed vehicle door limiter, the limiting planes of the upper limiting bulges and the lower limiting bulges of the limiting arm are designed, so that the working states of the upper compression spring and the lower compression spring of the limiter are different in the working process, the time for the failure and weakening of the compression springs is different, the elastic force of the compression spring with slow failure is matched with the adjusting mechanism, the pre-compression amount of the upper compression spring and the lower compression spring is increased through the extrusion of the extrusion block on the second rack, and the reduction degree of the resistance torque of the limiter after long-time working is weakened.

2. In order to ensure that the upper compression spring and the lower compression spring are different in working state, the invention designs a limiting plane of the limiting bulge at the lower side of the limiting arm. When the limiting plate is not designed, when the lower side roller passes through the limiting plane, the second gear rotates under the action of force balance, the compression amounts of the upper and lower compression springs are kept consistent, and the working states of the upper and lower compression springs are the same. When the limiting plate structure is considered, when the lower roller passes through the limiting plane, the limiting plate can bear the redundant compression elastic force of the upper compression spring relative to the lower compression spring, and meanwhile, the second gear continues to be kept static. The limiting plate ensures that the compression amount of the upper compression spring is higher than that of the lower compression spring on one hand, and meets the technical requirements of different working states of the upper and lower compression springs; on the other hand when spacing box did not cooperate with spacing arch, the limiting plate was kept away from downwards to the small circle of upside mounting panel under the power balance effect after upside compression spring elasticity weakened, realized that the second rack wears out spacing box, guaranteed follow-up adjustment process normal operating.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic structural view of the limiting arm.

Fig. 3 is a schematic view of the internal structure of the spacing box.

Fig. 4 is a schematic structural diagram of the spacing box.

Fig. 5 is a schematic view of the clamping mechanism distribution.

Fig. 6 is a schematic view of a roller installation.

Fig. 7 is a schematic view of the adjustment mechanism.

FIG. 8 is a one-way clutch installation schematic.

Fig. 9 is a schematic view of a slider installation.

Fig. 10 is a schematic diagram of a transmission arrangement.

Number designation in the figures: 1. a rubber buffer block; 2. a limiting arm; 3. a limiting box; 4. mounting a bracket; 5. mounting a plate; 6. a limiting bulge; 7. a limiting plane; 8. a trigger plate; 9. extruding the block; 11. a clamping mechanism; 13. an insertion opening; 14. an adjustment port; 15. a limiting plate; 16. an adjustment mechanism; 17. a transmission mechanism; 18. connecting blocks; 20. a fourth rack; 21. a first gear; 22. a second gear; 23. a second rack; 24. a third rack; 25. a first rack; 26. a telescopic rod; 27. a fifth gear; 28. a compression spring; 29. a roller; 30. a mounting frame; 31. a sixth rack; 32. a seventh rack; 33. a third gear; 34. a guide rail housing; 35. a slider; 36. a connecting rod; 37. a friction limiting sleeve; 38. a support shaft; 39. a fourth gear; 40. a one-way clutch; 41. an eighth rack; 42. connecting the squares; 43. a guide block; 44. installing a rotating shaft; 45. a limiting disc; 47. a friction disk; 48. a first square port; 49. a second square mouth; 50. a third square mouth; 51. and a guide groove.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples or figures are illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the vehicle body buffer device comprises a mounting bracket 4 fixed on a vehicle body, a limit box 3 fixed on a vehicle door, a rubber buffer block 1 providing buffer force, a limit arm 2 and a clamping mechanism 11, wherein as shown in fig. 2, the upper end face and the lower end face of the limit arm 2 are respectively provided with two limit bulges 6 distributed along the length direction of the limit arm 2, one end of the limit arm 2 is mounted on the mounting bracket 4 in a hinged manner, and the rubber buffer block 1 is mounted at the other end of the limit arm 2 and is limited by a pin mounted on the limit arm 2; the limiting arm 2 penetrates through the limiting box 3 to be matched with a clamping mechanism 11 arranged in the limiting box 3; the method is characterized in that: as shown in fig. 2, two of the four position-limiting protrusions 6 mounted on the position-limiting arm 2, which are located on the lower end surface of the position-limiting arm 2, have a position-limiting plane 7 at their lower ends, respectively.

The door stopper designed by the invention is a spring type stopper, and the conventional spring type stopper ensures that the limiting box 3 moves along the limiting arm 2 when the door is opened. Because the position limiting arm 2 is provided with structures with different heights, the compression spring 28 can elastically deform differently, so that people need to close the door with different forces when opening the door. The vehicle door can be limited at each limit position point. The rubber buffer block 1 has a buffering effect on the vehicle door.

As shown in fig. 3 and 5, the clamping mechanism 11 includes a roller 29, mounting plates 5, mounting brackets 30, and compression springs 28, wherein as shown in fig. 5 and 10, the two mounting plates 5 are mounted in the spacing box 3 by sliding fit up and down, the roller 29 is mounted on the mounting brackets 30 by rotating fit, and the two mounting brackets 30 are respectively mounted on the two mounting plates 5 by the two compression springs 28 in a one-to-one correspondence manner; the two rollers 29 are in rolling extrusion fit with the limiting arm 2; a first rack 25 and a second rack 23 are further installed in the limiting box 3 through sliding fit, the roller 29 on the upper side of the two rollers 29 is pressed to move upwards to control the first rack 25 to move through the transmission mechanism 17, and the roller 29 on the lower side is pressed to move downwards to control the second rack 23 to move through the transmission mechanism 17; as shown in fig. 2, the side surface of the limiting arm 2, which is provided with one end of the rubber buffer block 1, is also provided with an extrusion block 9 which performs an extrusion function on the first rack 25 and the second rack 23, the extrusion block 9 extrudes the first rack 25 and the second rack 23 to move, and the first rack 25 and the second rack 23 move to control the pre-compression degree of the compression spring 28 through the adjusting mechanism 16; the limiting plate 15 is in contact fit with the mounting plate 5 on the upper side.

When the door is opened, the upper roller 29 and the lower roller 29 slide relative to the limiting arm 2, when the upper roller 29 and the lower roller 29 are in contact fit with the area of the limiting arm 2 without the limiting bulge 6, the upper roller 29 and the lower roller 29 are tightly pressed on the limiting arm 2 under the pre-pressure of the two compression springs 28, and when the upper roller 29 and the lower roller 29 are in contact fit with the limiting bulge 6 on the limiting arm 2, the limiting bulge 6 can press the upper roller 29 and the lower roller 29, so that the upper roller 29 and the lower roller 29 further press the compression springs 28, and the resistance of the door to be opened is relatively increased. After the upper and lower rollers 29 roll between the two limiting protrusions 6, if the upper and lower rollers 29 want to roll continuously, the pressing force applied to the two rollers 29 by the limiting protrusions 6 needs to be overcome, so that a switch gear is formed at the joint of the two limiting protrusions 6 by the two sets of limiting protrusions 6, and the vehicle door has a positioning point in the opening and closing process.

As shown in fig. 6, the transmission mechanism 17 includes a connecting block 18, a fourth rack 20, a first gear 21, a second gear 22, a third rack 24, and a fifth gear 27, wherein one end of each of the two mounting plates 5 away from the corresponding roller 29 is provided with one connecting block 18, one end of the fourth rack 20 is fixedly mounted on the connecting block 18 located on the upper side of the two connecting blocks 18, the first gear 21 is rotatably mounted in the limiting box 3, and the first gear 21 is engaged with the fourth rack 20 and the first rack 25; one end of the third rack 24 is fixedly arranged on the connecting block 18 positioned on the lower side in the two connecting blocks 18, the fifth gear 27 is rotatably arranged in the limiting box 3, and the fifth gear 27 is respectively meshed with the third rack 24 and the second rack 23.

As shown in fig. 4, the stopper box 3 is provided with an insertion hole 13 through which the stopper arm 2 passes, and one side of the stopper box 3 facing the rubber buffer block 1 is provided with two adjusting holes 14 through which the first rack 25 and the second rack 23 pass.

As shown in fig. 7, the adjusting mechanism 16 includes a sixth rack 31, a seventh rack 32, a third gear 33, a rail housing 34, a slider 35, a connecting rod 36, a friction limiting sleeve 37, a guide block 43, a mounting rotating shaft 44, a limiting plate 15, a limiting plate 45, and a friction disc 47, wherein the limiting plate 15 is mounted in the limiting box 3 by sliding fit up and down.

As shown in fig. 9, two guide grooves 51 are symmetrically formed on the upper and lower end surfaces in the guide rail shell 34, a first through square opening 48 is formed on each of the inner end surfaces of the two guide grooves 51, a second square opening 49 is formed on one side surface in the guide rail shell 34, a third square opening 50 is formed on the other side surface in the guide rail shell 34, and the guide rail shell 34 is fixedly installed in the limiting box 3; two guide blocks 43 are symmetrically installed on two end faces of the upper end of the slide block 35, as shown in fig. 7 and 9, the slide block 35 is installed in the guide rail shell 34 through the sliding fit of the two guide blocks 43 in the two guide grooves 51, and the slide block 35 is in one-way sliding fit with the guide rail shell 34; one end of the mounting rotating shaft 44 is provided with a limiting disc 45, the mounting rotating shaft 44 is mounted on the sliding block 35 in a rotating fit manner, one end of the mounting rotating shaft 44, which is provided with the limiting disc 45, penetrates through a third square opening 50 on the guide rail shell 34 and is positioned outside the guide rail shell 34, and the other end of the mounting rotating shaft 44, which penetrates through a second square opening 49 on the guide rail shell 34 and is positioned outside the guide rail shell 34; one end of the friction limiting sleeve 37 is provided with a friction disc 47, the friction limiting sleeve 37 is arranged on the mounting rotating shaft 44 through the sliding fit of the sliding block 35 and the sliding groove, and the friction limiting sleeve 37 is in sliding fit with the limiting disc 45; the second gear 22 is fixedly arranged at one end of the mounting rotating shaft 44, which is not provided with the limiting disc 45, the second gear 22 is respectively meshed with the first rack 25 and the second rack 23, and the first rack 25 and the second rack 23 are respectively positioned at the upper side and the lower side of the second gear 22; one end of the connecting rod 36 passes through a first square opening 48 formed on the upper end surface of the guide rail shell 34 and is fixedly connected with the sliding block 35; the seventh rack 32 is fixedly provided with the other end of the connecting rod 36, one end of the sixth rack 31 is fixedly provided on the limiting plate 15, the third gear 33 is rotatably provided in the limiting box 3, and the third gear 33 is respectively meshed with the seventh rack 32 and the sixth rack 31.

As shown in fig. 2, the side surface of the limit arm 2, which is provided with one end of the rubber buffer block 1, is provided with a trigger plate 8 for extruding a friction limit sleeve 37; the limiting plate 15 is in contact fit with the mounting plate 5 on the upper side.

In the process that the limiting box 3 moves relative to the limiting arm 2, before the limiting box 3 contacts the rubber buffer block 1, the triggering plate 8 can contact the friction limiting sleeve 37 at first, and the triggering plate 8 extrudes the friction limiting sleeve 37, so that the friction limiting sleeve 37 and the sliding block 35 are in friction limiting, and the second gear 22 is limited to rotate.

As shown in fig. 7 and 8, the eighth rack 41 is fixedly installed at the lower end of the slide block 35 through a connecting block 42, and the connecting block 42 passes through a first square opening 48 formed on the lower end surface of the guide rail shell 34; one end of the supporting shaft 38 is fixedly arranged in the limiting box 3, the fourth gear 39 is arranged on the supporting shaft 38 through the one-way clutch 40, and the fourth gear 39 is meshed with the eighth gear 41; the movement of the slider 35 is made to be one-way slip by the one-way clutch 40.

As shown in fig. 6, two telescopic rods 26 are respectively installed between two of the mounting plates 5 and the corresponding mounting frame 30, and the two telescopic rods 26 are respectively nested in the two corresponding compression springs 28; the mounting plate 5 and the corresponding roller 29 are guided by the telescopic rod 26.

The specific working process is as follows: when the stopper designed by the invention is used, when the compression spring 28 does not fail or the elastic performance is not weakened, when people open the vehicle door, the upper and lower rollers 29 slide relative to the limiting arm 2, when the upper and lower rollers 29 are in contact fit with the area of the limiting arm 2 without the limiting protrusion 6, the upper mounting plate 5 has the tendency of moving upwards due to the fact that the upper compression spring 28 is in a pre-pressing state, the upper mounting plate 5 enables the fourth rack 20 to have the tendency of moving upwards through the corresponding connecting block 18, the first rack 25 has the tendency of passing through the adjustment opened on the limiting box 3 due to the transmission of the fourth rack 20 through the first gear 21, and further the second gear 22 has the tendency of rotating. The lower side compression spring 28 is in a pre-pressing state, so that the lower side mounting plate 5 has a downward moving tendency; the lower mounting plate 5 enables the third rack 24 to have a downward moving trend through the corresponding connecting block 18, the third rack 24 enables the second rack 23 to have a downward moving trend through the adjustment opened on the limiting box 3 through the transmission of the fifth gear 27, and further enables the second gear 22 to have a rotating trend, the direction of the second rack 23 driving the second gear 22 to rotate is opposite to the direction of the first rack 25 driving the second gear 22 to rotate, and the elastic strength of the upper compression spring 28 and the lower compression spring 28 is equal, so that the second gear 22 is in a static state in the state; the two compression springs 28 are compressed by the same amount, i.e., the pressure applied to the check arm 2 by the upper and lower rollers 29 is equal.

When the upper roller 29 and the lower roller 29 are in contact fit with the limiting protrusion 6 on the limiting arm 2, the limiting protrusion 6 can press the upper roller 29 and the lower roller 29, the upper roller 29 is pressed to move upwards to press the upper compression spring 28, and the lower roller 29 is pressed to move downwards to press the lower compression spring 28. When the lower roller 29 is in contact fit with the limiting plane 7 of the limiting protrusion 6 on the lower side of the limiting arm 2, the lower roller 29 stops being pressed and moves downwards, the compression amount of the compression spring 28 on the lower side is constant, and the lower mounting plate 5 is in a static state, but at the moment, the roller 29 on the upper side is continuously pressed by the limiting protrusion 6 on the upper side and moves upwards, and the compression spring 28 on the upper side continues to be compressed, but the limiting plate 15 is in contact fit with the mounting plate 5 on the upper side, so that in this case, the mounting plate 5 on the upper side is also in a static state, and the second gear 22 is still in a static state in this state; but the resistance to door opening is relatively high. After the upper and lower rollers 29 roll between the two limiting protrusions 6, if the upper and lower rollers 29 want to roll continuously, the pressing force applied to the two rollers 29 by the limiting protrusions 6 needs to be overcome, so that a switch gear is formed at the joint of the two limiting protrusions 6 by the two sets of limiting protrusions 6, and the vehicle door has a positioning point in the opening and closing process.

In the working process of the invention, because the upper compression spring 28 is pressed and deformed to a greater degree relative to the lower compression spring 28, the upper compression spring 28 is easy to damage and weaken relative to the lower compression spring 28, namely the elastic coefficient of the upper compression spring 28 is reduced due to damage; the service life and the performance of the upper side compression spring 28 designed by the invention are the same as those of the compression spring 28 used in the traditional stopper, so that after the structure designed by the invention is added, the high resistance torque of the stopper has longer service life than that of the traditional stopper; the elasticity of the compression spring is weakened into a slow change process, for the convenience of description, the invention takes the example that the elasticity coefficient of the upper side compression spring 28 is suddenly reduced, and the adjustment range is small in actual change.

When the compression spring 28 fails or the elastic performance becomes weak, the pressure applied to the check arm 2 by the upper and lower compression springs 28 through the corresponding roller 29 is deviated, and after the elastic performance of the upper compression spring 28 is weakened, the pushing force applied to the upper mounting plate 5 by the upper compression spring 28 is smaller than the pushing force applied to the lower mounting plate 5 by the lower compression spring 28, in this case, the driving force of the second rack 23 to the second gear 22 is larger than the driving force of the first rack 25 to the second gear 22, and the second gear 22 rotates until the driving force of the second rack 23 to the second gear 22 is the same as the driving force of the first rack 25 to the second gear 22, and at this time, the compression amounts of the upper and lower compression springs 28 are different, and after the driving forces are balanced, the second rack 23 moves to the outside of the check box 3 with respect to the first rack 25, and in this state, when the door is opened to the maximum state, after the limiting box 3 moves to be in contact with the rubber buffer block 1, the extrusion block 9 arranged on the rubber buffer block 1 can push the second rack 23 to move inwards relative to the limiting box 3, and in this state, because the friction limiting sleeve 37 clamps the installation rotating shaft 44 relative to the sliding block 35, the second rack 23 moves to drive the sliding block 35 to slide in the guide rail shell 34 through the second gear 22; meanwhile, the sliding of the sliding block 35 drives the second gear 22 to move, the second gear 22 moves to drive the first rack 25 to move, the first rack 25 drives the mounting plate 5 located on the upper side to move downwards through transmission, the sliding block 35 moves to drive the connecting rod 36 to move, the connecting rod 36 moves to drive the seventh rack 32 to move, the seventh rack 32 moves to drive the third gear 33 to rotate, the third gear 33 rotates to drive the sixth rack 31 to move, the sixth rack 31 moves to drive the limiting plate 15 to move downwards, namely, the mounting plate 5 and the limiting plate 15 located on the upper side move downwards simultaneously, and the compression amount of the upper compression spring 28 is increased; the movement of the second rack 23 drives the lower mounting plate 5 to move upwards through the fifth gear 27, the third rack 24 and the connecting block 18, and the compression amount of the lower compression spring 28 is increased. When the vehicle door is closed, the extrusion block 9 and the limiting box 3 are separated, and the sliding block 35 slides in a single direction, so that the sliding block 35 cannot reset, the upper mounting plate 5 and the lower mounting plate 5 are both closer to the roller 29 under the action of the sliding block 35 and the second gear 22, and the upper compression spring 28 and the lower compression spring 28 keep force balance under the action of the second gear 22. When the limiting box 3 is at the same position of the limiting arm 2, the slide block 35 moves to increase the compression amount of the upper and lower compression springs 28, and the reduction of the resistance torque caused by the weakening of the elasticity of the compression springs 28 is compensated. Because the position of the limiting plate 15 is repositioned by moving the sliding block 35, the effect of the limiting plate 15 is ensured to be exerted smoothly.

Claims

1. A car door stopper comprises a mounting bracket fixed on a car body, a limiting box fixed on a car door, a rubber buffer block providing buffering force, a limiting arm and a clamping mechanism, wherein the upper end surface and the lower end surface of the limiting arm are respectively provided with two limiting bulges distributed along the length direction of the limiting arm; the limiting arm penetrates through the limiting box and is matched with a clamping mechanism arranged in the limiting box; the method is characterized in that: the lower ends of two limiting bulges positioned on the lower end surface of the limiting arm in the four limiting bulges arranged on the limiting arm are respectively provided with a limiting plane;

the clamping mechanism comprises rollers, mounting plates, mounting frames and compression springs, wherein the two mounting plates are arranged in the limiting box in a vertically sliding fit manner, the rollers are arranged on the mounting frames in a rotating fit manner, and the two mounting frames are respectively arranged on the two mounting plates in a one-to-one correspondence manner through the two compression springs; the two rollers are in rolling extrusion fit with the limiting arm; a first rack and a second rack are further installed in the limiting box through sliding fit, the roller on the upper side of the two rollers is pressed to move upwards to control the first rack to move through a transmission mechanism, and the roller on the lower side is pressed to move downwards to control the second rack to move through the transmission mechanism; the side surface of one end of the limiting arm, which is provided with the rubber buffer block, is also provided with an extrusion block which plays a role in extruding the first rack and the second rack, the extrusion block extrudes the first rack and the second rack to move, and the first rack and the second rack move to control the pre-pressing degree of the compression spring through the adjusting mechanism;

the adjusting mechanism comprises a guide rail shell, a sliding block, a friction limiting sleeve, an installation rotating shaft, a limiting plate and a friction disc, wherein the limiting plate is installed in the limiting box in a vertically sliding fit manner; the guide rail shell is fixedly arranged in the limiting box, the sliding block is arranged in the guide rail shell in a sliding fit manner, and the sliding block and the guide rail shell are in one-way sliding fit; one end of the installation rotating shaft is provided with a limiting disc, the installation rotating shaft is installed on the sliding block in a rotating fit mode, one end of the installation rotating shaft, which is provided with the limiting disc, penetrates through a third square opening in the guide rail shell and is located on the outer side of the guide rail shell, and the other end of the installation rotating shaft penetrates through the guide rail shell and is located on the outer side of the guide rail shell; one end of the friction limiting sleeve is provided with a friction disc, the friction limiting sleeve is installed on the installation rotating shaft in a sliding fit mode, and the friction limiting sleeve is in sliding fit with the limiting disc;

2. The automotive door check according to claim 1, wherein: the transmission mechanism comprises connecting blocks, a fourth rack, a first gear, a second gear, a third rack and a fifth gear, wherein one ends of the two mounting plates, which are far away from the corresponding idler wheels, are respectively provided with one connecting block; one end of a third rack is fixedly arranged on the connecting block positioned on the lower side of the two connecting blocks, a fifth gear is rotatably arranged in the limiting box, and the fifth gear is respectively meshed with the third rack and the second rack;

3. The automotive door check according to claim 1, wherein: the adjusting mechanism further comprises a sixth rack, a seventh rack, a third gear, a connecting rod and a guide block, wherein two guide grooves are symmetrically formed in the upper end surface and the lower end surface in the guide rail shell, a first through square opening is formed in each of the inner end surfaces of the two guide grooves, a second square opening is formed in one side surface in the guide rail shell, and a third square opening is formed in the other side surface in the guide rail shell; two guide blocks are symmetrically arranged on two end faces of the upper end of the sliding block, and the sliding block is arranged in the guide rail shell through the sliding fit of the two guide blocks in the two guide grooves; the friction limiting sleeve is arranged on the mounting rotating shaft through sliding fit of the sliding block and the sliding groove, the second gear is fixedly arranged at one end of the mounting rotating shaft, which is not provided with the limiting disc, and is respectively meshed with the first rack and the second rack, and the first rack and the second rack are respectively positioned at the upper side and the lower side of the second gear; one end of the connecting rod passes through a first square opening formed in the upper end face of the guide rail shell and is fixedly connected with the sliding block; the other end of the connecting rod is fixedly installed on the seventh rack, one end of the sixth rack is fixedly installed on the limiting plate, the third gear is rotatably installed in the limiting box, and the third gear is meshed with the seventh rack and the sixth rack respectively.

4. A vehicle door check according to claim 3, wherein: the lower end of the sliding block is fixedly provided with an eighth rack through a connecting square block, and the connecting square block penetrates through a first square opening formed in the lower end face of the guide rail shell; one end of the supporting shaft is fixedly arranged in the limiting box, the fourth gear is arranged on the supporting shaft through the one-way clutch, and the fourth gear is meshed with the eighth rack.

5. The automotive door check according to claim 1, wherein: two telescopic links are respectively installed between two above-mentioned mounting panels and the mounting bracket that corresponds, and two telescopic links are nested respectively in two compression springs that correspond.