Electric limiting stopper for intelligent vehicle door

Abstract

The electric limiting stopper comprises a shell and a driving device arranged in the shell, the driving device is connected with a transmission assembly, the transmission assembly is connected with a push rod device, a push rod resistance adjusting device is arranged in the shell, the push rod device comprises a push rod, and the push rod resistance adjusting device comprises a fixed sliding block and an adjustable sliding block. The fixed sliding block and the adjustable sliding block are oppositely arranged on the two sides of the push rod and are in surface contact with the push rod, one end of the elastic piece is connected with the adjustable sliding block, and the other end of the elastic piece is connected with an adjusting assembly; the friction force between the adjustable sliding block and the fixed sliding block and the push rod is increased or decreased to adjust the advancing resistance of the push rod. According to the electric limiting stopper for the intelligent vehicle door, the resistance of the push rod can be adjusted, so that the consistency of a vehicle door system is improved, meanwhile, the waterproof effect of a product is enhanced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile manufacturing, and in particular to an electric limiter for an intelligent vehicle door. Background Art

[0002] With the development of automobile electrification and intelligence, the electric opening and closing of car doors has gradually become popular. The configuration rate of electric back doors has exceeded 50%, and intelligent electric side doors have also appeared on a few high-end models. As the core component of intelligent electric side doors, electric limiters are still in the early stages of industry development. Although the existing products on the market have achieved basic functions and performance, they have different degrees of deficiencies in higher-level requirements such as consistency, reliability, comfort and cost, and the maturity of the products needs to be continuously improved. For example: the internal resistance value of the device varies greatly between different parts of the same product, resulting in poor consistency in the performance of the door system, which is a common pain point in the industry; in the prior art, electric limiters generally adopt a barrel structure, and in the production demoulding process, a large draft angle is designed, and there is a large gap between the push rod and the slideway of the push rod, which causes the push rod to shake easily; some products in the prior art do not consider the mass manufacturing process, and the fasteners are often complicated to assemble, and the production efficiency is low; the appearance push rods of some products are directly made of metal blanks, and the visual quality is poor. The present invention aims to develop a relatively complete electric limit switch product to solve the pain points of the above-mentioned products and promote the development of the industry. Summary of the invention

[0003] In view of the above-mentioned deficiencies of the current electric limiter, the present invention provides an electric limiter for a smart door, which can adjust the resistance of the push rod after assembly, thereby improving the consistency of the door system and solving the problem that the push rod is easy to shake due to the large gap between the push rod slider and the guide groove.

[0004] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0005] The invention relates to an electric limiter for an intelligent vehicle door, comprising a shell, wherein a driving device is arranged inside the shell, an output shaft of the driving device is connected to a transmission assembly, the transmission assembly is connected to a push rod device, the push rod device comprises a push rod, the push rod is connected to a push rod resistance adjusting device, the push rod resistance adjusting device is arranged inside the shell, the push rod resistance adjusting device comprises a fixed slider and an adjustable slider, the fixed slider and the adjustable slider are arranged on two sides of the push rod relative to each other and contact the push rod surface, wherein an elastic member is connected to one end of the adjustable slider away from the push rod, and an adjusting assembly is connected to the other end of the elastic member, the adjusting assembly is configured to increase or decrease the elastic potential energy of the elastic member by squeezing or relaxing the elastic member, thereby increasing or decreasing the thrust applied by the elastic member to the adjustable slider, thereby increasing or decreasing the friction between the adjustable slider and the fixed slider and the push rod to adjust the travel resistance of the push rod; the driving device drives the push rod device to perform telescopic movement through the transmission assembly.

[0006] According to one aspect of the present invention, the push rod device further includes a vehicle body fixing bracket, the vehicle body fixing bracket is connected to the push rod, and the push rod is connected to the transmission assembly.

[0007] According to one aspect of the present invention, the adjusting assembly includes an adjusting bolt and an adjusting nut fixedly disposed in the housing, the adjusting bolt is connected to the elastic member, and the adjusting nut is sleeved on the adjusting bolt.

[0008] According to one aspect of the present invention, the push rod comprises a core rod, and a plastic coating layer is disposed on the outer surface of the core rod.

[0009] According to one aspect of the present invention, the transmission assembly includes a gear transmission assembly, the gear transmission assembly is connected to the driving device, the gear transmission assembly is connected to the screw assembly, the screw assembly is provided with a push rod nut slider assembly, and the push rod nut slider assembly is connected to the push rod.

[0010] According to one aspect of the present invention, the gear transmission assembly includes a first gear shaft connected to the driving device, the first gear shaft is sleeved with a first gear, the first gear is meshed with a second gear, the second gear is sleeved on the second gear shaft, the second gear shaft is arranged on the housing, the second gear is meshed with a third gear, and the third gear is connected to the screw assembly.

[0011] According to one aspect of the present invention, the screw assembly includes a screw, the third gear is sleeved on the screw, one end of the screw is connected to the housing via a self-lubricating bushing, and the other end of the screw is connected to the housing via a deep groove ball bearing.

[0012] According to one aspect of the present invention, the push rod nut slider assembly includes a screw nut sleeved on the screw rod, a push rod slider is fixedly mounted on the screw nut, and the push rod slider is connected to the push rod.

[0013] According to one aspect of the present invention, the shell includes an upper shell and a lower shell, the upper shell is fixedly connected to the lower shell, and a sealing assembly is provided between the upper shell and the lower shell, and the sealing assembly is used to prevent water from entering the interior of the shell.

[0014] According to one aspect of the present invention, the sealing assembly includes a water retaining brim arranged on the edge of the upper shell, a water retaining boss arranged on the edge of the lower shell, the upper shell is provided with a rib, the lower shell is provided with a groove at a position corresponding to the rib, and a sealing strip is provided in the groove.

[0015] The advantages of the present invention are as follows: by setting the water retaining boss and the water retaining brim, the first and second waterproofing are achieved through the shell structure itself without increasing the cost; the third waterproofing is achieved through the interference fit between the convex rib and the sealing strip; the setting of the sealing assembly improves the waterproof and dustproof level of the product, thereby expanding its application range. By setting the push rod resistance adjustment device, the friction resistance of the push rod can be accurately adjusted. The resistance directly acts on the push rod, effectively eliminating the invalid stroke of the push rod, thereby avoiding the user from feeling the shaking of the door during use; at the same time, the design makes the resistance of the electric limiter controlled within a smaller tolerance range, ensuring that the resistance felt by the user when opening and closing the door is more consistent, thereby improving the use quality of the door; by setting the adjustment bolt, the resistance can be finely adjusted after assembly. The push rod adopts a core rod made of high-strength material, and a plastic coating is arranged on the outside of the core rod, which not only meets the strength requirements but also ensures the appearance quality; by setting the upper shell and the lower shell, and connecting the two with self-tapping screws, compared with the barrel-shaped electric limiter in the prior art, the number of screws to be assembled is significantly reduced, the production efficiency is improved and the installation process is simplified; at the same time, it solves the problem of the large draft angle limitation existing in the barrel-shaped structure in the prior art, resulting in the front and rear non-parallel guide grooves, and the gap between the push rod slider and the guide groove is too large, thus causing shaking. The electric limiter for a smart car door provided by the present invention can adjust the push rod resistance after assembly, thereby improving the consistency of the car door system, and at the same time, it also enhances the waterproof effect of the product, improves production efficiency, and solves the problem of the large gap between the push rod slider and the guide groove, which makes the push rod easy to shake. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the installation of an electric limiter for an intelligent door according to the present invention;

[0018] Figure 2 This is an exploded schematic diagram of an electric limiter for a smart door according to the present invention;

[0019] Figure 3 A partial schematic diagram of a driving device of an electric limiter for an intelligent vehicle door according to the present invention;

[0020] Figure 4 It is a partial schematic diagram of a screw rod assembly of an electric limiter for a smart door according to the present invention;

[0021] Figure 5 It is a partial schematic diagram of a push rod resistance adjustment device of an electric limiter for a smart door according to the present invention;

[0022] Figure 6 A cross-sectional schematic diagram of an electric limiter for a smart door according to the present invention;

[0023] Figure 7 It is a partial schematic diagram of a push rod nut slider assembly of an electric limiter for a smart door according to the present invention;

[0024] Figure 8 A schematic diagram of the deflection of a push rod slider of an electric limiter for a smart door according to the present invention;

[0025] Fig. 9 It is a partial schematic diagram of a sealing component of an electric limiter for a smart door according to the present invention;

[0026] Fig.10 The present invention is a schematic cross-sectional view of a push rod of an electric limiter for an intelligent vehicle door.

[0027] 1. Shell; 11. Upper shell; 12. Lower shell; 13. Sealing assembly; 131. Sealing strip; 132. Water retaining cap brim; 133. Convex rib; 134. Water retaining boss; 135. Groove; 14. Guide groove; 15. Self-tapping screw; 2. Push rod resistance adjustment device; 21. Fixed slider; 22. Adjustable slider; 23. Adjusting bolt; 24. Adjusting nut; 25. Elastic member; 26. Elastic member baffle; 3. Driving device; 31. Output shaft assembly; 311. Motor output shaft; 312. Buffer cap; 313. Bushing bearing; 32. Driving motor; 4. Transmission assembly; 41. Gear transmission assembly; 411. First gear shaft; 412. First gear; 413 , second gear; 414, second gear shaft; 415, third gear; 42, screw assembly; 421, screw; 422, deep groove ball bearing; 423, self-lubricating bushing; 43, push rod nut slider assembly; 431, screw nut; 432, push rod slider; 4321, protrusion; 433, push rod fixing pin; 434, push rod pin nut; 5, push rod device; 51, vehicle body fixing bracket; 52, push rod; 521, core rod; 522, plastic coating; 53, push rod pin; 6, vehicle door mounting base; 7, vehicle door; 8, vehicle body; B, push rod center plane; G, screw axis; H, screw nut axis; K, push rod slider guide groove direction line; α, angle between G and H. DETAILED DESCRIPTION

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

[0029] Preferred embodiment 1

[0030] like Figures 1 to 10As shown, an electric limiter for a smart door, the electric limiter is mainly used for electric rotating side door opening of a car, the electric limiter comprises a housing 1, a door mounting base 6 is provided on one side of the housing 1, the electric limiter is mounted on the door 7 through the door mounting base 6, preferably, the door mounting base 6 is fastened to the door 7 by a nut. The housing 1 comprises an upper housing 11 and a lower housing 12 fixedly connected to the upper housing 11, the upper housing 11 and the lower housing 12 are fixedly connected by self-tapping screws 15, preferably, the upper housing 11 and the lower housing 12 are non-completely symmetrically designed, and when assembled, the number of fixing screws is preferably 8. A driving device 3 is provided inside the housing 1, the driving device 3 is connected to a transmission assembly 4, the transmission assembly 4 is connected to a push rod device 5, and under the drive of the driving device 3, the motion transmission of the push rod device 5 can be realized through the transmission assembly 4. The push rod device 5 is connected to a push rod resistance adjustment device 2, and the push rod resistance adjustment device 2 is used to adjust the resistance of the push rod device 5.

[0031] In actual application, the driving device 3 includes a driving motor 32 installed in the lower shell 12, the output end of the driving motor 32 is connected to the output shaft assembly 31, the driving motor is electrically connected through a motor wiring harness, and the output shaft assembly 31 includes a motor output shaft 311 connected to the output end of the driving motor 32, and the motor output shaft 311 is connected to the transmission assembly 4.

[0032] In actual application, the transmission assembly 4 includes a gear transmission assembly 41, which is connected to the driving device 3, and the gear transmission assembly 41 is connected to the screw assembly 42. The screw assembly 42 is provided with a push rod nut slider assembly 43, and the push rod nut slider assembly 43 is connected to the push rod device 5.

[0033] In practical applications, the gear transmission assembly 41 includes a first gear shaft 411 connected to the driving device 3. Specifically, the first gear shaft 411 is connected to the motor output shaft 311 through a buffer cap 312. The buffer cap 312 is a rubber elastic body, which can buffer the motor output shaft 311 and the first gear shaft 411. The first gear shaft 411 is installed inside the lower housing 12. The first gear shaft 411 is sleeved with a bushing bearing 313. The first gear shaft 411 is sleeved with a first gear 412. The first gear 412 is meshed and connected with the second gear 413. The second gear 413 is sleeved on the second gear shaft 414. The second gear shaft 414 is installed inside the lower housing 12. The second gear 413 is meshed and connected with the third gear 415. The third gear 415 is connected to the screw assembly 42. The first gear shaft 411, the second gear shaft 414 and the third gear 415 form a two-stage gear transmission.

[0034] In actual application, the screw assembly 42 includes a screw 421, the third gear 415 is sleeved on the screw 421, both ends of the screw 421 are installed on the lower shell 12, one end of the screw 421 is connected to the lower shell 12 through a self-lubricating bushing 423, and the other end of the screw 421 is connected through a deep groove ball bearing 422, the push rod nut slider assembly 43 is installed on the screw 421, the push rod nut slider assembly 43 includes a screw nut 431 sleeved on the screw 421, and a push rod slider 432 is installed on the outer surface of the screw nut 431. Preferably, the screw nut 431 and the push rod slider 432 are fastened by threads; the push rod 52 and the push rod slider 432 are fastened by threads of a push rod fixing pin 433 and a push rod pin nut 434.

[0035] In actual application, the two sides of the push rod slider 432 are symmetrically provided with protrusions 4321, and the corresponding positions of the upper shell 11 and the lower shell 12 where the push rod slider 432 is installed are provided with guide grooves 14, and the push rod slider 432 can slide in the guide grooves 14, and the guide grooves 14 can play a role in positioning and restraining the push rod slider 432, and the guide grooves 14 are parallel to the axis of the screw rod 421. When the push rod 52 is subjected to force in the opposite direction to the force direction of the screw nut 431, the screw nut 431 tends to deflect, forming α (the angle between the screw axis G and the screw nut axis H), as shown in FIG. Figure 7 and Figure 8 The guide groove 14 and the protrusion 4321 can keep the push rod slider 432 moving along the push rod slider guide groove direction line K, so as to keep the screw axis G and the screw nut axis H collinear or as small as possible. This structure can eliminate the risks of increased resistance, increased wear, abnormal noise, etc. between the screw 421 and the screw nut 431 without adding additional guide rails.

[0036] In actual application, the push rod device 5 includes a body fixing bracket 51, which is installed on the body 8. The body fixing bracket 51 is fixed on the body 8 by bolts. The body fixing bracket 51 is connected to the push rod 52. The body fixing bracket 51 and the push rod 52 are riveted together by a push rod pin 53. The push rod pin 53 is preferably a step pin. The body fixing bracket 51 is connected to the push rod nut slider assembly 43 through the push rod 52.

[0037] In practical applications, the push rod 52 includes a central core rod 521, the outer shell of the core rod 521 is provided with a plastic coating layer 522, the core rod 521 is connected to the push rod nut slider assembly 43, preferably, the core rod 521 is a steel core, and the material is preferably high-strength carbon steel to meet the strength requirements of the push rod; the material of the plastic coating layer can be PA, ABS, PP, PE, PVC, silicone, etc. The plastic coating layer 522 is wrapped on the outer surface of the core rod 521 by plastic coating injection molding process, and the surface is smooth and beautiful, which is used to improve the appearance quality of the visible area of ​​the push rod 52 and enhance the wear resistance of the push rod 52.

[0038] In actual application, the push rod resistance adjustment device 2 includes a fixed slider 21 and an adjustable slider 22, the fixed slider 21 and the adjustable slider 22 are relatively arranged on both sides of the push rod 52 and are in surface contact with the push rod 52, the fixed slider 21 is fixedly installed on the lower shell 12, the adjustable slider 22 is movably connected to the lower shell 12, and the end of the adjustable slider 22 away from the push rod 52 is connected to the elastic member 25, the elastic member 25 can be a coil spring, a spring, etc., and the other end of the elastic member 25 is connected to an adjustment component, and the adjustment component is configured to increase or decrease the elastic potential energy of the elastic member 25 by squeezing or relaxing the elastic member 25, thereby causing the thrust applied to the adjustable slider by the elastic member 25 to increase or decrease, thereby increasing or decreasing the friction between the adjustable slider 22 and the fixed slider 21 and the push rod to adjust the travel resistance of the push rod. The adjustment includes an adjustment bolt 23 connected to the other end of the elastic member 25, and an elastic member baffle 26 is arranged between the adjustment bolt 23 and the elastic member 25. An adjustment nut 24 is fixedly installed inside the bottom surface of the lower shell 12, and the adjustment nut 24 is sleeved on the adjustment bolt 23. The head of the adjustment bolt 23 passes through the outer wall of the lower shell 12, and the head of the adjustment bolt 23 is arranged outside the shell 1. The adjustment nut 24 adopts a self-locking anti-loosening structure to prevent the adjustment bolt 23 from loosening. The central axis of the elastic member 25 is colinear with the central axis of the adjustment bolt 23, parallel to the direction of the adjustable slider 22, and perpendicular to the central plane B in the thickness direction of the push rod 52. The user can change the compression length and elastic force of the elastic member 25 by screwing the adjustment bolt 23 in and out. The elastic force of the elastic member 25 acts on the adjustable slider 22, and the adjustable slider 22 applies the elastic force to the surface of the push rod 52 to generate pressure. The magnitude of the pressure changes the friction between the adjustable slider 22 and the push rod 52, thereby adjusting the resistance magnitude of the push rod 52. The factors that affect the resistance of the entire electric limiter include the motor tooth torque, the internal resistance of the reduction box, the friction resistance of the transmission gear assembly, the friction resistance of the screw and the nut, the friction resistance of the push rod, etc. In actual production, the accumulated resistance of these factors will fluctuate greatly. By adjusting the bolt 23 to change the friction resistance of the push rod 52, the fluctuation of the resistance of other components can be compensated, and ultimately the resistance of the electric limiter can be kept at a smaller fluctuation.

[0039] Working principle: the main part of the electric limiter is installed in the door 7, the body fixing bracket 51 is installed on the body 8, the body fixing bracket 51 is connected to the main part of the electric limiter through the push rod 52, and the door 7 is opened and closed by driving the push rod 52 to extend and retract. Its function is realized as follows: the driving device 3 is energized to drive the output shaft assembly 31 to rotate, the output shaft assembly 31 is connected to the first gear shaft 411 of the gear transmission assembly 41, the power is transmitted from the first gear shaft 411 to the screw rod 421 through the gear transmission assembly 41, and the speed is adjusted to change the output torque, the third gear 415 is connected to the screw rod assembly 42 to drive the screw rod 421 to rotate, the screw rod 421 drives the push rod nut slider assembly 43 to move back and forth along the screw rod axis G direction, the push rod nut slider assembly 43 is connected to the push rod device 5, and drives the push rod device 5 to do back and forth telescopic movement. When the push rod 52 extends, the door 7 opens, and when the push rod 52 retracts, the door 7 closes. The extension and retraction directions of the push rod 52 are changed by the forward and reverse rotation of the driving motor 32. The push rod resistance adjustment device 2 is used to adjust the internal resistance of the electric limiter, to balance the individual differences in the resistance of other transmission components in the device, and to ensure the consistency of the resistance of the device assembly product.

[0040] The advantages of the implementation of the present invention are as follows: through the setting of the push rod resistance adjustment device, the friction resistance of the push rod can be accurately adjusted. The resistance directly acts on the push rod, effectively eliminating the invalid stroke of the push rod, thereby avoiding the user from feeling the shaking of the door during use; at the same time, the design makes the resistance of the electric limiter controlled within a smaller tolerance range, ensuring that the resistance felt by the user when opening and closing the door is more consistent, thereby improving the use quality of the door; through the setting of the adjustment bolt, the resistance can be finely adjusted after the assembly is completed. The push rod adopts a core rod made of high-strength material, and a plastic coating layer is arranged on the outside of the core rod, which not only meets the strength requirements but also ensures the appearance quality; through the setting of the upper shell and the lower shell, and the use of self-tapping screws to connect the two, compared with the barrel-shaped electric limiter in the prior art, the number of screws assembled is significantly reduced, the production efficiency is improved and the installation process is simplified; at the same time, it solves the problem of large draft angle limitation in the barrel structure in the prior art, resulting in the non-parallelism of the guide groove front and back, and the excessive gap between the push rod slider and the guide groove, thereby causing shaking.

[0041] Preferred embodiment 2

[0042] like Figures 1 to 10As shown, an electric limiter for a smart door, the electric limiter is mainly used for electric rotating side door opening of a car, the electric limiter comprises a housing 1, a door mounting base 6 is provided on one side of the housing 1, the electric limiter is mounted on the door 7 through the door mounting base 6, preferably, the door mounting base 6 is fastened to the door 7 by a nut. The housing 1 comprises an upper housing 11 and a lower housing 12 fixedly connected to the upper housing 11, the upper housing 11 and the lower housing 12 are fixedly connected by self-tapping screws 15, preferably, the upper housing 11 and the lower housing 12 are non-completely symmetrically designed, and when assembled, the number of fixing screws is preferably 8. A sealing assembly 13 is provided between the upper housing 11 and the lower housing 12, the sealing assembly 13 is used to prevent water from entering the interior of the housing 1 from the gap between the housings, a driving device 3 is provided inside the housing 1, the driving device 3 is connected to the transmission assembly 4, the transmission assembly 4 is connected to the push rod device 5, under the drive of the driving device 3, the movement transmission of the push rod device 5 can be realized through the transmission assembly 4. The push rod device 5 is connected to a push rod resistance adjusting device 2 , and the push rod resistance adjusting device 2 is used to adjust the resistance of the push rod device 5 .

[0043] In actual application, the driving device 3 includes a driving motor 32 installed in the lower shell 12, the output end of the driving motor 32 is connected to the output shaft assembly 31, the driving motor is electrically connected through a motor wiring harness, and the output shaft assembly 31 includes a motor output shaft 311 connected to the output end of the driving motor 32, and the motor output shaft 311 is connected to the transmission assembly 4.

[0044] In actual application, the transmission assembly 4 includes a gear transmission assembly 41, which is connected to the driving device 3, and the gear transmission assembly 41 is connected to the screw assembly 42. The screw assembly 42 is provided with a push rod nut slider assembly 43, and the push rod nut slider assembly 43 is connected to the push rod device 5.

[0045] In practical applications, the gear transmission assembly 41 includes a first gear shaft 411 connected to the driving device 3. Specifically, the first gear shaft 411 is connected to the motor output shaft 311 through a buffer cap 312. The buffer cap 312 is a rubber elastic body, which can buffer the motor output shaft 311 and the first gear shaft 411. The first gear shaft 411 is installed inside the lower housing 12. The first gear shaft 411 is sleeved with a bushing bearing 313. The first gear shaft 411 is sleeved with a first gear 412. The first gear 412 is meshed and connected with the second gear 413. The second gear 413 is sleeved on the second gear shaft 414. The second gear shaft 414 is installed inside the lower housing 12. The second gear 413 is meshed and connected with the third gear 415. The third gear 415 is connected to the screw assembly 42. The first gear shaft 411, the second gear shaft 414 and the third gear 415 form a two-stage gear transmission.

[0046] In actual application, the screw assembly 42 includes a screw 421, the third gear 415 is sleeved on the screw 421, both ends of the screw 421 are installed on the lower shell 12, one end of the screw 421 is connected to the lower shell 12 through a self-lubricating bushing 423, and the other end of the screw 421 is connected through a deep groove ball bearing 422, the push rod nut slider assembly 43 is installed on the screw 421, the push rod nut slider assembly 43 includes a screw nut 431 sleeved on the screw 421, and a push rod slider 432 is installed on the outer surface of the screw nut 431. Preferably, the screw nut 431 and the push rod slider 432 are fastened by threads; the push rod 52 and the push rod slider 432 are fastened by threads of a push rod fixing pin 433 and a push rod pin nut 434.

[0047] In actual application, the two sides of the push rod slider 432 are symmetrically provided with protrusions 4321, and the corresponding positions of the upper shell 11 and the lower shell 12 where the push rod slider 432 is installed are provided with guide grooves 14, and the push rod slider 432 can slide in the guide grooves 14, and the guide grooves 14 can play a role in positioning and restraining the push rod slider 432, and the guide grooves 14 are parallel to the axis of the screw rod 421. When the push rod 52 is subjected to force in the opposite direction to the force direction of the screw nut 431, the screw nut 431 tends to deflect, forming α (the angle between the screw axis G and the screw nut axis H), as shown in FIG. Figure 7 and Figure 8The guide groove 14 and the protrusion 4321 can keep the push rod slider 432 moving along the push rod slider guide groove direction line K, so as to keep the screw axis G and the screw nut axis H collinear or as small as possible. This structure can eliminate the risks of increased resistance, increased wear, abnormal noise, etc. between the screw 421 and the screw nut 431 without adding additional guide rails.

[0048] In actual application, the push rod device 5 includes a body fixing bracket 51, which is installed on the body 8. The body fixing bracket 51 is fixed on the body 8 by bolts. The body fixing bracket 51 is connected to the push rod 52. The body fixing bracket 51 and the push rod 52 are riveted together by a push rod pin 53. The push rod pin 53 is preferably a step pin. The body fixing bracket 51 is connected to the push rod nut slider assembly 43 through the push rod 52.

[0049] In practical applications, the push rod 52 includes a central core rod 521, the outer shell of the core rod 521 is provided with a plastic coating layer 522, the core rod is connected to the push rod nut slider assembly 43, preferably, the core rod 521 is a steel core, and the material is preferably high-strength carbon steel to meet the strength requirements of the push rod; the material of the plastic coating layer can be PA, ABS, PP, PE, PVC, silicone, etc. The plastic coating layer 522 is wrapped on the outer surface of the core rod 521 by plastic coating injection molding process, and the surface is smooth and beautiful, which is used to improve the appearance quality of the visible area of ​​the push rod 52. And enhance the wear resistance of the push rod 52.

[0050] In actual application, the push rod resistance adjustment device 2 includes a fixed slider 21 and an adjustable slider 22, the fixed slider 21 and the adjustable slider 22 are relatively arranged on both sides of the push rod 52 and are in surface contact with the push rod 52, the fixed slider 21 is fixedly installed on the lower shell 12, the adjustable slider 22 is movably connected to the lower shell 12, and the end of the adjustable slider 22 away from the push rod 52 is connected to the elastic member 25, the elastic member 25 can be a coil spring, a spring, etc., and the other end of the elastic member 25 is connected to an adjustment component, and the adjustment component is configured to increase or decrease the elastic potential energy of the elastic member 25 by squeezing or relaxing the elastic member 25, thereby causing the thrust applied to the adjustable slider by the elastic member 25 to increase or decrease, thereby increasing or decreasing the friction between the adjustable slider 22 and the fixed slider 21 and the push rod to adjust the travel resistance of the push rod. The adjustment includes an adjustment bolt 23 connected to the other end of the elastic member 25, and an elastic member baffle 26 is arranged between the adjustment bolt 23 and the elastic member 25. An adjustment nut 24 is fixedly installed inside the bottom surface of the lower shell 12, and the adjustment nut 24 is sleeved on the adjustment bolt 23. The head of the adjustment bolt 23 passes through the outer wall of the lower shell 12, and the head of the adjustment bolt 23 is arranged outside the shell 1. The adjustment nut 24 adopts a self-locking anti-loosening structure to prevent the adjustment bolt 23 from loosening. The central axis of the elastic member 25 is colinear with the central axis of the adjustment bolt 23, parallel to the direction of the adjustable slider 22, and perpendicular to the central plane B in the thickness direction of the push rod 52. The user can change the compression length and elastic force of the elastic member 25 by screwing the adjustment bolt 23 in and out. The elastic force of the elastic member 25 acts on the adjustable slider 22, and the adjustable slider 22 applies the elastic force to the surface of the push rod 52 to generate pressure. The magnitude of the pressure changes the friction between the adjustable slider 22 and the push rod 52, thereby adjusting the resistance magnitude of the push rod 52. The factors that affect the resistance of the entire electric limiter include the motor tooth torque, the internal resistance of the reduction box, the friction resistance of the transmission gear assembly, the friction resistance of the screw and the nut, the friction resistance of the push rod, etc. In actual production, the accumulated resistance of these factors will fluctuate greatly. By adjusting the bolt 23 to change the friction resistance of the push rod 52, the fluctuation of the resistance of other components can be compensated, and ultimately the resistance of the electric limiter can be kept at a smaller fluctuation.

[0051] In practical applications, the sealing assembly 13 includes a water retaining brim 132 arranged on the edge of the outer peripheral wall of the upper shell 11, a convex rib 133 is arranged on the outer peripheral wall of the upper shell 11, a water retaining boss 134 is arranged on the outer peripheral wall edge of the lower shell 12, a groove 135 is arranged on the outer peripheral wall of the lower shell 12 at a position corresponding to the convex rib 133, a sealing strip 131 is arranged in the groove 135, and the convex rib 133 is interference-fitted with the sealing strip 131. Preferably, a drive motor compartment is arranged at the drive device 3 to separate the drive motor compartment from the screw compartment, and a sealing strip 131 is arranged on the wall of the drive motor compartment to enhance the waterproof performance of the drive motor compartment. The water-retaining brim 132 can prevent water drops or water flow from entering the gap between the upper shell 11 and the lower shell 12, forming the first waterproofing; the water-retaining boss 134 of the lower shell 12 can prevent water flowing along the surface of the lower shell 12 from entering the gap between the upper and lower shells, which is the second waterproofing; the convex rib 133 and the sealing strip 131 have an interference fit, which can prevent water from entering the shell 1 through the gap between the upper and lower shells, which is the third waterproofing. By setting up three waterproofing devices, the waterproof and dustproof levels of the electric limiter are improved, and the drive motor compartment reaches the waterproof standard of IP67, and the screw compartment reaches the waterproof standard of IP54, thereby expanding its application field.

[0052] Working principle: the main part of the electric limiter is installed in the door 7, the body fixing bracket 51 is installed on the body 8, the body fixing bracket 51 is connected to the main part of the electric limiter through the push rod 52, and the door 7 is opened and closed by driving the push rod 52 to extend and retract. Its function is realized as follows: the driving device 3 is energized to drive the output shaft assembly 31 to rotate, the output shaft assembly 31 is connected to the first gear shaft 411 of the gear transmission assembly 41, the power is transmitted from the first gear shaft 411 to the screw rod 421 through the gear transmission assembly 41, and the speed is adjusted to change the output torque, the third gear 415 is connected to the screw rod assembly 42 to drive the screw rod 421 to rotate, the screw rod 421 drives the push rod nut slider assembly 43 to move back and forth along the screw rod axis G direction, the push rod nut slider assembly 43 is connected to the push rod device 5, and drives the push rod device 5 to do back and forth telescopic movement. When the push rod 52 extends, the door 7 opens, and when the push rod 52 retracts, the door 7 closes. The extension and retraction directions of the push rod 52 are changed by the forward and reverse rotation of the driving motor 32. The push rod resistance adjustment device 2 is used to adjust the internal resistance of the electric limiter, to balance the individual differences in the resistance of other transmission components in the device, and to ensure the consistency of the resistance of the device assembly product.

[0053] The advantages of the present invention are as follows: by setting the water retaining boss and the water retaining brim, the first and second waterproofing are achieved through the shell structure itself without increasing the cost; the third waterproofing is achieved through the interference fit between the convex rib and the sealing strip; the setting of the sealing assembly improves the waterproof and dustproof level of the product, thereby expanding its application range. By setting the push rod resistance adjustment device, the friction resistance of the push rod can be accurately adjusted. The resistance directly acts on the push rod, effectively eliminating the invalid stroke of the push rod, thereby avoiding the user from feeling the shaking of the door during use; at the same time, the design makes the resistance of the electric limiter controlled within a smaller tolerance range, ensuring that the resistance felt by the user when opening and closing the door is more consistent, thereby improving the use quality of the door; by setting the adjustment bolt, the resistance can be finely adjusted after assembly. The push rod adopts a core rod made of high-strength material, and a plastic-coated layer is arranged on the outside of the core rod, which not only meets the strength requirements but also ensures the appearance quality; by setting the upper shell and the lower shell, and connecting the two with self-tapping screws, compared with the barrel-shaped electric limiter in the prior art, the number of screws assembled is significantly reduced, the production efficiency is improved and the installation process is simplified; at the same time, it solves the problem of large draft angle limitation in the barrel-shaped structure in the prior art, which causes the guide groove to be non-parallel before and after, and the gap between the push rod slider and the guide groove is too large, thereby causing shaking.

[0054] The advantages of the present invention are as follows: by setting the water retaining boss and the water retaining brim, the first and second waterproofing are achieved through the shell structure itself without increasing the cost; the third waterproofing is achieved through the interference fit between the convex rib and the sealing strip; the setting of the sealing assembly improves the waterproof and dustproof level of the product, thereby expanding its application range. By setting the push rod resistance adjustment device, the friction resistance of the push rod can be accurately adjusted. The resistance directly acts on the push rod, effectively eliminating the invalid stroke of the push rod, thereby avoiding the user from feeling the shaking of the door during use; at the same time, the design makes the resistance of the electric limiter controlled within a smaller tolerance range, ensuring that the resistance felt by the user when opening and closing the door is more consistent, thereby improving the use quality of the door; by setting the adjustment bolt, the resistance can be finely adjusted after assembly. The push rod adopts a core rod made of high-strength material, and a plastic coating is arranged on the outside of the core rod, which not only meets the strength requirements but also ensures the appearance quality; by setting the upper shell and the lower shell, and connecting the two with self-tapping screws, compared with the barrel-shaped electric limiter in the prior art, the number of screws to be assembled is significantly reduced, the production efficiency is improved and the installation process is simplified; at the same time, it solves the problem of the large draft angle limitation existing in the barrel-shaped structure in the prior art, resulting in the front and rear guide grooves not being parallel, and the gap between the push rod slider and the guide groove being too large, thus causing the shaking problem. The electric limiter for a smart car door provided by the present invention can adjust the push rod resistance after assembly, thereby improving the consistency of the car door system, and at the same time, it also enhances the waterproof effect of the product, improves production efficiency, and solves the problem of the large gap between the push rod slider and the guide groove, which makes the push rod easy to shake.

[0055] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An electric limiter for an intelligent vehicle door, comprising a housing (1), wherein a driving device (3) is arranged inside the housing (1), wherein an output shaft of the driving device (3) is connected to a transmission assembly (4), and the transmission assembly (4) is connected to a push rod device (5), characterized in that: The housing (1) is provided with a push rod resistance adjustment device (2), the push rod device (5) comprises a push rod (52), the push rod (52) is connected to the push rod resistance adjustment device (2), the push rod resistance adjustment device (2) comprises a fixed slider (21) and an adjustable slider (22), the fixed slider (21) and the adjustable slider (22) are arranged on both sides of the push rod (52) and are in surface contact with the push rod (52), wherein the end of the adjustable slider (22) away from the push rod (52) is connected to an elastic The elastic member (25) has an adjusting component connected to the other end thereof, and the adjusting component is configured to increase or decrease the elastic potential energy of the elastic member (25) by squeezing or relaxing the elastic member (25), thereby increasing or decreasing the thrust applied by the elastic member (25) to the adjustable slider, thereby increasing or decreasing the friction between the adjustable slider (22), the fixed slider (21) and the push rod (52) to adjust the travel resistance of the push rod; the driving device (3) drives the push rod device (5) to perform telescopic movement through the transmission component (4).

2. The electric limiter for the smart door according to claim 1, characterized in that: The adjustment assembly comprises an adjustment bolt (23) and an adjustment nut (24) fixedly arranged in the housing (1); the adjustment bolt (23) is connected to the elastic member (25); and the adjustment nut (24) is sleeved on the adjustment bolt (23).

3. The electric limiter for the smart door according to claim 1, characterized in that: The push rod device (5) further comprises a vehicle body fixing bracket (51), the vehicle body fixing bracket (51) is connected to the push rod (52), and the push rod (52) is connected to the transmission assembly (4).

4. The electric limiter for the smart door according to claim 1, characterized in that: The push rod (52) comprises a core rod (521), and a plastic coating layer (522) is provided on the outer surface of the core rod (521).

5. The electric limiter for the smart door according to claim 1, characterized in that: The transmission assembly (4) comprises a gear transmission assembly (41), the gear transmission assembly (41) is connected to the driving device (3), the gear transmission assembly (41) is connected to the screw assembly (42), a push rod nut slider assembly (43) is sleeved on the screw assembly (42), and the push rod nut slider assembly (43) is connected to the push rod (52).

6. The electric limiter for the smart door according to claim 5, characterized in that: The gear transmission assembly (41) comprises a first gear shaft (411) connected to the driving device (3); a first gear (412) is sleeved on the first gear shaft (411); the first gear (412) is meshedly connected with a second gear (413); the second gear (413) is sleeved on a second gear shaft (414); the second gear shaft (414) is arranged on the housing (1); the second gear (413) is meshedly connected with a third gear (415); and the third gear (415) is connected to the screw assembly (42).

7. The electric limiter for the smart door according to claim 6, characterized in that: The screw assembly (42) comprises a screw (421), the third gear (415) is sleeved on the screw (421), one end of the screw (421) is connected to the housing (1) via a self-lubricating bushing (423), and the other end of the screw (421) is connected to the housing (1) via a deep groove ball bearing (422).

8. The electric limiter for the smart door according to claim 7, characterized in that: The push rod nut slider assembly (43) comprises a screw nut (431) sleeved on the screw rod (421), a push rod slider (432) is fixedly mounted on the screw nut (431), and the push rod slider (432) is connected to the push rod (52).

9. The electric limiter for the smart door according to any one of claims 1 to 8, characterized in that: The housing (1) comprises an upper housing (11) and a lower housing (12); the upper housing is fixedly connected to the lower housing; a sealing component (13) is provided between the upper housing (11) and the lower housing (12); the sealing component (13) is used to prevent water from entering the interior of the housing (1).

10. The electric limiter for the smart door according to claim 9, characterized in that: The sealing assembly (13) comprises a water retaining brim (132) arranged at the edge of the upper shell (11), and a water retaining boss (134) arranged at the edge of the lower shell (12); the upper shell (11) is provided with a convex rib (133); the lower shell (12) is provided with a groove (135) at a position corresponding to the convex rib (133); and a sealing strip (131) is arranged in the groove (135).

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