Electric check for intelligent vehicle door

Abstract

An electric check for an intelligent vehicle door, comprising a housing (1), inside which a driving device (3) is provided. The driving device (3) is connected to a transmission assembly (4), the transmission assembly (4) is connected to a push rod device (5), and a push rod resistance adjustment device (2) is provided inside the housing (1). The push rod device (5) comprises a push rod (52), and 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) being oppositely arranged on two sides of the push rod (52) and being in surface contact with the push rod (52). One end of an elastic member (25) is connected to the adjustable slider (22), and the other end of the elastic member (25) is connected to an adjustment assembly. The adjustment assembly is configured to adjust the increase or decrease of the friction force between the adjustable slider (22) and the fixed slider (21) and the push rod (52) by compressing or releasing the elastic member (25), so as to adjust the travelling resistance of the push rod (52).

Description

Electric limiter for intelligent vehicle door TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile manufacturing, and particularly relates to an electric limiter for intelligent vehicle door. BACKGROUND

[0002] With the development of automobile electrification and intelligence, electric opening and closing of vehicle doors gradually becomes popular, and the configuration rate of electric back doors has exceeded 50%, and intelligent electric side opening doors also appear on a few high-end vehicles. As a core component of intelligent electric side opening doors, the electric limiter is currently in the early stage of industry development. Although the existing products in the market have realized basic functions and performance, they still have some deficiencies in consistency, reliability, comfort and cost at different levels, and the maturity of the products needs to be continuously improved. For example: the internal resistance value of the device is greatly different between different components of the same product, which leads to poor consistency of the performance of the vehicle door system, which is a common pain point in the industry; in the prior art, the electric limiter generally adopts a barrel-shaped structure, and a large draft angle is designed in the production demolding process, so that there is a large gap between the push rod and the sliding channel of the push rod, and the push rod is prone to shaking; some products in the prior art do not consider the mass production process, and the assembly of fasteners is complicated, so the production efficiency is low; the appearance of the push rod of some products is directly made of a metal blank, and the visual quality is poor. The present application aims to develop a relatively perfect electric limiter product to solve the above-mentioned product pain points and help the development of the industry.

[0003] In view of the above-mentioned deficiencies of the existing electric limiter, the present application provides an electric limiter for intelligent vehicle door, which can adjust the resistance of the push rod after assembly is completed, thereby improving the consistency of the vehicle door system and solving the problem of large gap between the push rod sliding block and the guide groove, which makes the push rod prone to shaking.

[0004] To achieve the above-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0005] The utility model provides an electric limit stopper for intelligent car door, including the casing, drive arrangement is arranged inside the casing, the output shaft of drive arrangement is connected with transmission assembly, transmission assembly is connected with push rod device, push rod device includes push rod, push rod is connected with push rod resistance adjusting device, push rod resistance adjusting device sets up inside the casing, push rod resistance adjusting device includes fixed slide and adjustable slide, fixed slide and adjustable slide opposite setting in the both sides of push rod and with push rod surface contact, wherein, the one end of adjustable slide is connected with elastic piece away from push rod, the other end of elastic piece is connected with adjusting assembly, adjusting assembly is configured as through extruding or relaxing elastic piece, with elastic potential energy of elastic piece increases or reduces, thereby causes elastic piece to add or reduce the thrust of adjustable slide, further makes the friction between adjustable slide and fixed slide and push rod increases or reduces to adjust push rod travel resistance, drive arrangement drives push rod device to carry out telescopic motion through transmission assembly.

[0006] According to one aspect of the utility model, the push rod device further includes a vehicle body fixing support connected with the push rod, and the push rod is connected with the transmission assembly.

[0007] According to one aspect of the utility model, the adjusting assembly includes an adjusting screw connected with the elastic piece and an adjusting nut fixedly arranged in the casing.

[0008] According to one aspect of the utility model, the push rod includes a core rod, and a plastic layer is arranged on the outer surface of the core rod.

[0009] According to one aspect of the utility model, the transmission assembly includes a gear transmission assembly connected with the drive device, the gear transmission assembly is connected with a lead screw assembly, a push rod nut sliding block assembly is sleeved on the lead screw assembly, and the push rod nut sliding block assembly is connected with the push rod.

[0010] According to one aspect of the utility model, the gear transmission assembly includes a first gear shaft connected with the drive device, a first gear is sleeved on the first gear shaft, the first gear is meshed and connected with a second gear, the second gear is sleeved on a second gear shaft, the second gear shaft is arranged on the casing, the second gear is meshed and connected with a third gear, and the third gear is connected with the lead screw assembly.

[0011] According to one aspect of the utility model, the lead screw assembly includes a lead screw, the third gear is sleeved on the lead screw, one end of the lead screw is connected with the casing through a self-lubricating bushing, and the other end of the lead screw is connected with the casing through a deep groove ball bearing.

[0012] According to one aspect of the present application, the push rod nut slider assembly comprises a lead screw nut sleeved on the lead screw, and a push rod slider fixedly installed on the lead screw nut and connected with the push rod.

[0013] According to one aspect of the present application, the housing comprises an upper housing and a lower housing fixedly connected with each other, and a sealing assembly arranged between the upper housing and the lower housing for preventing water from entering the inside of the housing.

[0014] According to one aspect of the present application, the sealing assembly comprises a water-blocking brim arranged at the edge of the upper housing, a water-blocking boss arranged at the edge of the lower housing, a convex rib arranged on the upper housing, a groove arranged at the corresponding position of the lower housing and a sealing strip arranged in the groove.

[0015] The present application has the following advantages: through the arrangement of the water-blocking boss and the water-blocking brim, a first and a second waterproofing are realized without increasing the cost; through the interference fit of the convex rib and the sealing strip, a third waterproofing is realized; the arrangement of the sealing assembly improves the waterproofing and dustproofing level of the product, thereby expanding the application range; through the arrangement of the push rod resistance adjusting device, the frictional resistance of the push rod can be accurately adjusted, the resistance directly acts on the push rod, effectively eliminates 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 controls the resistance of the electric limit stopper within a small 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 arrangement of the adjusting bolt, the resistance can be finely adjusted after assembly; through the use of the high-strength material for the core rod of the push rod, and the arrangement of the plastic layer outside the core rod, the strength requirement is met and the appearance quality is ensured; through the arrangement of the upper housing and the lower housing and the use of self-tapping screws to connect the two, compared with the barrel-shaped structure electric limit stopper 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, the problem of large draft angle limitation in the barrel-shaped structure in the prior art is solved, which causes the front and rear of the guide groove to be not parallel, and the gap between the push rod slider and the guide groove to be too large, thereby causing shaking. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] Fig. 1 is a schematic diagram of the door installation of the electric limit stopper for the intelligent vehicle door according to the present application;

[0018] Fig. 2 is an exploded schematic diagram of the electric limit stopper for the intelligent vehicle door according to the present application;

[0019] Fig. 3 is a partial schematic diagram of the driving device of the electric limit stopper for the intelligent vehicle door according to the present application;

[0020] Fig. 4 is a partial schematic diagram of the screw rod assembly of the electric limit stopper for the intelligent vehicle door according to the present application;

[0021] Fig. 5 is a partial schematic diagram of the push rod resistance adjusting device of the electric limit stopper for the intelligent vehicle door according to the present application;

[0022] Fig. 6 is a sectional schematic diagram of the electric limit stopper for the intelligent vehicle door according to the present application;

[0023] Fig. 7 is a partial schematic diagram of the push rod nut sliding block assembly of the electric limit stopper for the intelligent vehicle door according to the present application;

[0024] Fig. 8 is a push rod sliding block deflection schematic diagram of the electric limit stopper for the intelligent vehicle door according to the present application;

[0025] Fig. 9 is a partial schematic diagram of the sealing assembly of the electric limit stopper for the intelligent vehicle door according to the present application;

[0026] Fig. 10 is a push rod sectional schematic diagram of the electric limit stopper for the intelligent vehicle door according to the present application.

[0027] 1, housing; 11, upper housing; 12, lower housing; 13, sealing assembly; 131, sealing strip; 132, water-blocking brim; 133, convex rib; 134, water-blocking boss; 135, groove; 14, guide groove; 15, self-tapping screw; 2, push rod resistance adjusting device; 21, fixed sliding block; 22, adjustable sliding block; 23, adjusting bolt; 24, adjusting nut; 25, elastic member; 26, elastic member stop piece; 3, driving device; 31, output shaft assembly; 311, motor output shaft; 312, buffer cap; 313, bush 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, lead screw assembly; 421, lead screw; 422, deep groove ball bearing; 423, self-lubricating bushing; 43, push rod nut sliding block assembly; 431, lead screw nut; 432, push rod sliding block; 4321, protruding portion; 433, push rod fixing pin; 434, push rod pin nut; 5, push rod device; 51, vehicle body fixing support; 52, push rod; 521, core rod; 522, plastic coating layer; 53, push rod pin; 6, vehicle door mounting base; 7, vehicle door; 8, vehicle body; B, push rod center plane; G, lead screw axis; H, lead screw nut axis; K, push rod sliding block guide groove direction line; Alpha, included angle of G and H. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Preferred embodiment 1

[0030] As shown in Figures 1-10, an electric stopper for intelligent vehicle door, mainly used for electric rotating side opening door of the car, the electric stopper comprises a housing 1, one side of the housing 1 is provided with a door mounting base 6, the electric stopper is installed on the door 7 through the door mounting base 6, preferably, the door mounting base 6 is fastened and connected with the door 7 through nuts. The housing 1 comprises an upper housing 11 and a lower housing 12 fixedly connected with the upper housing 11, the upper housing 11 and the lower housing 12 are fixedly connected through self-tapping screws 15, preferably, the upper housing 11 and the lower housing 12 are designed as non-symmetrical, and the number of fixed screws is preferably 8 when assembled. The housing 1 is provided with a driving device 3 inside, the driving device 3 is connected with a transmission assembly 4, the transmission assembly 4 is connected with a 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 with a push rod resistance adjusting device 2, the push rod resistance adjusting device 2 is used for adjusting the resistance of the push rod device 5.

[0031] In practical application, the driving device 3 comprises a driving motor 32 installed in the lower housing 12, the output end of the driving motor 32 is connected with an output shaft assembly 31, the driving motor is electrically connected through a motor wire harness, the output shaft assembly 31 comprises a motor output shaft 311 connected with the output end of the driving motor 32, the motor output shaft 311 is connected with the transmission assembly 4.

[0032] In practical application, the transmission assembly 4 comprises a gear transmission assembly 41, the gear transmission assembly 41 is connected with the driving device 3, the gear transmission assembly 41 is connected with a lead screw assembly 42, the lead screw assembly 42 is sleeved with a push rod nut sliding block assembly 43, the push rod nut sliding block assembly 43 is connected with the push rod device 5.

[0033] In practical application, the gear transmission assembly 41 comprises a first gear shaft 411 connected with the driving device 3, specifically, the first gear shaft 411 is connected with 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 shell 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 engaged with a second gear 413, the second gear 413 is sleeved on a second gear shaft 414, the second gear shaft 414 is installed inside the lower shell 12, the second gear 413 is engaged with a third gear 415, the third gear 415 is connected with the lead screw assembly 42, the first gear shaft 411, the second gear shaft 414 and the third gear 415 constitute a two-stage gear transmission.

[0034] In practical application, the lead screw assembly 42 comprises a lead screw 421, the third gear 415 is sleeved on the lead screw 421, the lead screw 421 is installed at both ends of the lower shell 12, one end of the lead screw 421 is connected with the lower shell 12 through a self-lubricating bushing 423, the other end of the lead screw 421 is connected through a deep groove ball bearing 422, the push rod nut sliding block assembly 43 is installed on the lead screw 421, the push rod nut sliding block assembly 43 comprises a lead screw nut 431 sleeved on the lead screw 421, a push rod sliding block 432 is installed outside the lead screw nut 431, preferably, the lead screw nut 431 and the push rod sliding block 432 are connected through thread fastening; the push rod 52 is connected with the push rod sliding block 432 through a push rod fixing pin 433 and a push rod pin nut 434.

[0035] In practical application, the push rod sliding block 432 is symmetrically provided with a protruding part 4321 on both sides, the upper shell 11 and the lower shell 12 are provided with a guide groove 14 at the corresponding position of the push rod sliding block 432, the push rod sliding block 432 can slide in the guide groove 14, the guide groove 14 can position and constrain the guide of the push rod sliding block 432, the guide groove 14 is parallel to the axis of the lead screw 421. When the push rod 52 is forced in the opposite direction of the lead screw nut 431, the lead screw nut 431 has a deflection tendency, forming an angle α (the angle between the lead screw axis G and the lead screw nut axis H), as shown in FIG. 7 and FIG. 8. The guide groove 14 and the protruding part 4321 can keep the push rod sliding block 432 moving along the push rod sliding block guide groove direction line K, so as to keep the lead screw axis G and the lead screw nut axis H collinear or as small deflection α as possible, which can eliminate the risk of increased resistance, intensified wear and tear, abnormal noise and the like between the lead screw 421 and the lead screw nut 431 without additional guide rails.

[0036] In practical application, the push rod device 5 comprises a vehicle body fixing support 51, the vehicle body fixing support 51 is installed on the vehicle body 8, the vehicle body fixing support 51 is fixedly installed on the vehicle body 8 through bolts, the vehicle body fixing support 51 is connected with a push rod 52, the vehicle body fixing support 51 and the push rod 52 are rivetedly connected through a push rod pin 53, the push rod pin 53 is preferably a stepped pin, and the vehicle body fixing support 51 is connected with the push rod nut sliding block assembly 43 through the push rod 52.

[0037] In practical application, the push rod 52 comprises a middle core rod 521, an outer sleeve of the core rod 521 is provided with a plastic coating layer 522, the core rod 521 is connected with the push rod nut sliding block assembly 43, preferably, the core rod 521 is a steel core, and the material is preferably high-strength carbon steel, so as to meet the strength requirement of the push rod; the material of the plastic coating layer can be PA, ABS, PP, PE, PVC, silica gel and the like. The plastic coating layer 522 is wrapped on the outer surface of the core rod 521 through a plastic injection molding process, the surface is smooth and beautiful, so as 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 practical applications, the push rod resistance adjusting device 2 comprises a fixed sliding block 21 and an adjustable sliding block 22, which are oppositely arranged on both sides of the push rod 52 and in surface contact with the push rod 52. The fixed sliding block 21 is fixedly installed on the lower housing 12, and the adjustable sliding block 22 is movably connected with the lower housing 12. One end of the adjustable sliding block 22 away from the push rod 52 is connected with an elastic member 25, which can be a coil spring, a spring piece, etc. The other end of the elastic member 25 is connected with an adjusting assembly. The adjusting assembly is configured to increase or decrease the elastic potential energy of the elastic member 25 by extruding or relaxing the elastic member 25, so as to increase or decrease the thrust of the elastic member 25 applied to the adjustable sliding block, and then increase or decrease the friction between the adjustable sliding block 22 and the fixed sliding block 21 and the push rod, so as to adjust the push rod travel resistance. The adjusting assembly comprises an adjusting bolt 23 connected with the other end of the elastic member 25. An elastic member baffle 26 is arranged between the adjusting bolt 23 and the elastic member 25. An adjusting nut 24 is fixedly installed inside the bottom surface of the lower housing 12. The adjusting nut 24 is sleeved on the adjusting bolt 23. The head of the adjusting bolt 23 penetrates through the outer side wall of the lower housing 12, and is arranged outside the housing 1. The adjusting nut 24 adopts a self-locking anti-loosening structure to prevent loosening of the adjusting bolt 23. The central axis of the elastic member 25 is collinear with the central axis of the adjusting bolt 23, parallel to the direction of the adjustable sliding block 22, and perpendicular to the central plane B of 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 in or out the adjusting bolt 23. The elastic force of the elastic member 25 acts on the adjustable sliding block 22, and the adjustable sliding block 22 generates pressure on the surface of the push rod 52. The size of the pressure changes the friction between the adjustable sliding block 22 and the push rod 52, so as to adjust the resistance received by the push rod 52. The factors affecting the resistance of the entire electric limit stopper include motor tooth slot torque, reducer internal resistance, transmission gear assembly friction resistance, screw rod and nut friction resistance, and push rod friction resistance. In actual production, the size of the cumulative fluctuation of these factors will be large. By adjusting the push rod friction resistance through the adjusting bolt 23, the fluctuation of the resistance of other components can be compensated, so that the resistance of the electric limit stopper remains small fluctuation.

[0039] Working principle: the main part of the electric limit stop is installed in the door 7, the body fixed support 51 is installed on the vehicle body 8, the body fixed support 51 is connected with the electric limit main part through the push rod 52, and the opening and closing of the door 7 are realized by driving the extension and contraction movement of the push rod 52. The function realization process is: the driving device 3 is electrified to drive the output shaft assembly 31 to rotate, the output shaft assembly 31 is connected with the first gear shaft 411 of the gear transmission assembly 41, the power is transmitted from the first gear shaft 411 to the lead screw 421 through the gear transmission assembly 41, and the rotation speed is adjusted to change the output torque, the third gear 415 is connected with the lead screw assembly 42 to drive the lead screw 421 to rotate, the lead screw 421 drives the push rod nut sliding block assembly 43 to move back and forth along the lead screw axis G direction, the push rod nut sliding block assembly 43 is connected with the push rod device 5, and the push rod device 5 is driven to move back and forth. When the push rod 52 is extended, the door 7 is opened, and when the push rod 52 is retracted, the door 7 is closed, and the extension and contraction movement direction of the push rod 52 is changed by the forward and reverse rotation of the driving motor 32. The push rod resistance adjusting device 2 is used to adjust the internal resistance of the electric limit stop, and is used to balance the individual differences of the internal resistance of the other transmission components of the device, so as to ensure the consistency of the resistance of the device assembly product.

[0040] The advantages of the embodiment of the present application are: through the setting of the push rod resistance adjusting device, the friction resistance of the push rod can be accurately adjusted, the resistance directly acts on the push rod, the invalid stroke of the push rod is effectively eliminated, and the user can avoid feeling the shaking of the door in the use process; at the same time, the design can control the resistance of the electric limit stop within a smaller tolerance range, ensure that the user feels more consistent resistance when opening and closing the door, and improve the use quality of the door; through the setting of the adjusting bolt, the resistance can be finely adjusted after assembly is completed. The core rod made of high-strength material is used for the push rod, a plastic layer is arranged outside the core rod, the strength requirement is met, and the appearance quality is ensured; through the setting of the upper shell and the lower shell, and the connection of the two by using self-tapping screws, compared with the barrel-shaped structure electric limit stop 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, the problem of large draft angle limitation in the prior art barrel-shaped structure, which causes the front and back of the guide groove to be not parallel, and the gap between the push rod sliding block and the guide groove to be too large, thereby causing shaking, is solved.

[0041] Preferred embodiment 2

[0042] As shown in FIG. 1 to FIG. 10, an electric stopper for intelligent vehicle door, mainly used for electric rotating side opening door of vehicle, the electric stopper comprises a shell 1, one side of the shell 1 is provided with a door mounting base 6, the electric stopper is installed on the door 7 through the door mounting base 6, preferably, the door mounting base 6 is fastened and connected with the door 7 through nuts. The shell 1 comprises an upper shell 11 and a lower shell 12 fixedly connected with the upper shell 11, the upper shell 11 and the lower shell 12 are fixedly connected through self-tapping screws 15, preferably, the upper shell 11 and the lower shell 12 adopt non-symmetrical design, and the number of fixed screws is preferably 8 when assembled. A sealing assembly 13 is arranged between the upper shell 11 and the lower shell 12, the sealing assembly 13 is used for preventing water from entering the inside of the shell 1 through the gap between the shells, a driving device 3 is arranged in the inside of the shell 1, the driving device 3 is connected with a transmission assembly 4, the transmission assembly 4 is connected with a push rod device 5, under the driving 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 with a push rod resistance adjusting device 2, the push rod resistance adjusting device 2 is used for adjusting the resistance of the push rod device 5.

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

[0044] In actual application, the transmission assembly 4 comprises a gear transmission assembly 41, the gear transmission assembly 41 is connected with the driving device 3, the gear transmission assembly 41 is connected with a lead screw assembly 42, a push rod nut sliding block assembly 43 is sleeved on the lead screw assembly 42, the push rod nut sliding block assembly 43 is connected with the push rod device 5.

[0045] In practical application, the gear transmission assembly 41 comprises a first gear shaft 411 connected with the driving device 3, specifically, the first gear shaft 411 is connected with 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 shell 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 engaged with a second gear 413, the second gear 413 is sleeved on a second gear shaft 414, the second gear shaft 414 is installed inside the lower shell 12, the second gear 413 is engaged with a third gear 415, the third gear 415 is connected with the lead screw assembly 42, the first gear shaft 411, the second gear shaft 414 and the third gear 415 constitute a two-stage gear transmission.

[0046] In practical application, the lead screw assembly 42 comprises a lead screw 421, the third gear 415 is sleeved on the lead screw 421, the lead screw 421 is installed at both ends of the lower shell 12, one end of the lead screw 421 is connected with the lower shell 12 through a self-lubricating bushing 423, the other end of the lead screw 421 is connected through a deep groove ball bearing 422, the push rod nut sliding block assembly 43 is installed on the lead screw 421, the push rod nut sliding block assembly 43 comprises a lead screw nut 431 sleeved on the lead screw 421, a push rod sliding block 432 is installed outside the lead screw nut 431, preferably, the lead screw nut 431 and the push rod sliding block 432 are connected through thread fastening; the push rod 52 is connected with the push rod sliding block 432 through a push rod fixing pin 433 and a push rod pin nut 434.

[0047] In practical application, the push rod sliding block 432 is symmetrically provided with a protruding part 4321 on both sides, the upper shell 11 and the lower shell 12 are provided with a guide groove 14 at the corresponding position of the push rod sliding block 432, the push rod sliding block 432 can slide in the guide groove 14, the guide groove 14 can position and constrain the guide of the push rod sliding block 432, the guide groove 14 is parallel to the axis of the lead screw 421. When the push rod 52 is forced in the opposite direction of the lead screw nut 431, the lead screw nut 431 has a deflection tendency, forming an angle α (the angle between the lead screw axis G and the lead screw nut axis H), as shown in FIG. 7 and FIG. 8. The guide groove 14 and the protruding part 4321 can keep the push rod sliding block 432 moving along the push rod sliding block guide groove direction line K, so as to keep the lead screw axis G and the lead screw nut axis H collinear or as small deflection α as possible, which can eliminate the risk of increased resistance, intensified wear and tear, abnormal noise and the like between the lead screw 421 and the lead screw nut 431 without additional guide rails.

[0048] In practical application, the push rod device 5 comprises a vehicle body fixing support 51, the vehicle body fixing support 51 is installed on the vehicle body 8, the vehicle body fixing support 51 is fixedly installed on the vehicle body 8 through bolts, the vehicle body fixing support 51 is connected with a push rod 52, the vehicle body fixing support 51 and the push rod 52 are rivetedly connected through a push rod pin 53, the push rod pin 53 is preferably a stepped pin, and the vehicle body fixing support 51 is connected with the push rod nut sliding block assembly 43 through the push rod 52.

[0049] In practical application, the push rod 52 comprises a middle core rod 521, an outer sleeve of the core rod 521 is provided with a plastic coating layer 522, the core rod is connected with the push rod nut sliding block assembly 43, preferably, the core rod 521 is a steel core, and the material is preferably high-strength carbon steel, so as to meet the strength requirement of the push rod; the material of the plastic coating layer can be PA, ABS, PP, PE, PVC, silica gel and the like. The plastic coating layer 522 is wrapped on the outer surface of the core rod 521 through a plastic injection molding process, the surface is smooth and beautiful, so as to improve the appearance quality of the visible area of the push rod 52. And the wear resistance of the push rod 52 is enhanced.

[0050] In practical applications, the push rod resistance adjusting device 2 comprises a fixed sliding block 21 and an adjustable sliding block 22, which are oppositely arranged on both sides of the push rod 52 and in surface contact with the push rod 52. The fixed sliding block 21 is fixedly installed on the lower housing 12, and the adjustable sliding block 22 is movably connected with the lower housing 12. One end of the adjustable sliding block 22 away from the push rod 52 is connected with an elastic member 25, which can be a coil spring, a spring piece, etc. The other end of the elastic member 25 is connected with an adjusting assembly. The adjusting assembly is configured to increase or decrease the elastic potential energy of the elastic member 25 by extruding or relaxing the elastic member 25, so as to increase or decrease the thrust of the elastic member 25 applied to the adjustable sliding block, and then increase or decrease the friction between the adjustable sliding block 22 and the fixed sliding block 21 and the push rod, so as to adjust the push rod travel resistance. The adjusting assembly comprises an adjusting bolt 23 connected with the other end of the elastic member 25. An elastic member baffle 26 is arranged between the adjusting bolt 23 and the elastic member 25. An adjusting nut 24 is fixedly installed inside the bottom surface of the lower housing 12. The adjusting nut 24 is sleeved on the adjusting bolt 23. The head of the adjusting bolt 23 penetrates through the outer side wall of the lower housing 12, and is arranged outside the housing 1. The adjusting nut 24 adopts a self-locking anti-loosening structure to prevent loosening of the adjusting bolt 23. The central axis of the elastic member 25 is collinear with the central axis of the adjusting bolt 23, parallel to the direction of the adjustable sliding block 22, and perpendicular to the central plane B of 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 in or out the adjusting bolt 23. The elastic force of the elastic member 25 acts on the adjustable sliding block 22, and the adjustable sliding block 22 generates pressure on the surface of the push rod 52. The size of the pressure changes the friction between the adjustable sliding block 22 and the push rod 52, so as to adjust the resistance received by the push rod 52. The factors affecting the resistance of the entire electric limit stopper include motor tooth slot torque, reducer internal resistance, transmission gear assembly friction resistance, screw rod and nut friction resistance, and push rod friction resistance. In actual production, the size of the cumulative fluctuation of these factors will be large. By adjusting the push rod friction resistance through the adjusting bolt 23, the fluctuation of the resistance of other components can be compensated, so that the resistance of the electric limit stopper remains small fluctuation.

[0051] In practical applications, the sealing assembly 13 includes a water-blocking brim 132 arranged on the outer peripheral wall edge of the upper shell 11, the outer peripheral wall of the upper shell 11 is provided with a protrusion 133, the outer peripheral wall edge of the lower shell 12 is provided with a water-blocking boss 134, the outer peripheral wall of the lower shell 12 is provided with a groove 135 at a position corresponding to the protrusion 133, a sealing strip 131 is arranged in the groove 135, and the protrusion 133 is in interference fit with the sealing strip 131. Preferably, a drive motor compartment is arranged at the driving device 3 to realize separation of the drive motor compartment and the screw rod compartment, 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 arrangement of the water-blocking brim 132 can block water droplets or water flow from directly entering the gap between the upper shell 11 and the lower bottom shell 12, forming the first waterproof; the water-blocking boss 134 of the lower shell 12 can block water flowing along the surface of the lower bottom shell 12 from entering the gap between the upper and lower shells, which is the second waterproof; the interference fit between the protrusion 133 and the sealing strip 131 can prevent water from entering the shell 1 through the gap between the upper and lower shells, which is the third waterproof. Through the arrangement of the three waterproof devices, the waterproof and dustproof level of the electric limit stopper is improved, the drive motor compartment reaches the IP67 waterproof standard, the screw rod compartment reaches the IP54 waterproof standard, and the application field is further expanded.

[0052] Working principle: The main part of the electric limit stopper is installed in the door 7, the vehicle body fixed support 51 is installed on the vehicle body 8, and the vehicle body fixed support 51 is connected with the electric limit main part through the push rod 52. The opening and closing of the door 7 are realized by driving the extension and retraction movement of the push rod 52. The function realization process is as follows: the driving device 3 is electrified to drive the rotation of the output shaft assembly 31, the output shaft assembly 31 is connected with 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, the rotation speed is adjusted to change the output torque, the third gear 415 is connected with the screw rod assembly 42 to drive the rotation of the screw rod 421, the screw rod 421 drives the push rod nut sliding block assembly 43 to move back and forth along the screw rod axis G direction, the push rod nut sliding block assembly 43 is connected with the push rod device 5 to drive the push rod device 5 to move back and forth. When the push rod 52 is extended, the door 7 is opened, and when the push rod 52 is retracted, the door 7 is closed. The opening and closing directions of the push rod 52 are changed by the forward and reverse rotation of the driving motor 32. The push rod resistance adjusting device 2 is used to adjust the internal resistance of the electric limit stopper, to balance the individual differences of the resistance of other transmission parts in the device, and to ensure the consistency of the resistance of the device assembly product.

[0053] The application has the advantages that: by setting the water blocking boss and the water blocking eaves, the first and second waterproofs are realized without increasing the cost, the third waterproof is realized by the interference fit between the ribs and the sealing strip, the waterproof and dustproof level of the product is improved by setting the sealing assembly, thereby expanding the application range; by setting the push rod resistance adjusting device, the friction resistance of the push rod can be accurately adjusted, the resistance directly acts on the push rod, the invalid stroke of the push rod is effectively eliminated, thereby avoiding the user from feeling the shaking of the door in the use process; meanwhile, the design controls the resistance of the electric limit stopper in a small tolerance range, ensures 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 adjusting bolt, the resistance can be finely adjusted after the assembly is completed; by adopting the high-strength material to make the core rod of the push rod, the core rod is externally provided with a plastic layer, the strength requirement is met, and the appearance quality is ensured; by setting the upper shell and the lower shell and connecting the two by using the self-tapping screw, compared with the existing barrel-shaped structure electric limit stopper, the assembly quantity of the screw is significantly reduced, the production efficiency is improved, and the installation process is simplified; meanwhile, the problem that the large draft angle in the existing barrel-shaped structure limits the front and rear of the guide groove to be not parallel and the gap between the push rod sliding block and the guide groove is too large, thereby causing the shaking is solved.

[0054] The advantages of the embodiment of the present application are as follows: by arranging the water blocking boss and the water blocking eave, the first and second waterproofing are realized without increasing the cost, the third waterproofing is realized by the interference fit between the reinforcing rib and the sealing strip, the waterproofing and dustproofing grade of the product is improved by arranging the sealing assembly, thereby expanding the application range; by arranging the push rod resistance adjusting device, the friction resistance of the push rod can be accurately adjusted, the resistance directly acts on the push rod, effectively eliminates the invalid stroke of the push rod, thereby avoiding the user from feeling the shaking of the door in the use process; meanwhile, the design controls the resistance of the electric limit stopper in a small tolerance range, ensures 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 arranging the adjusting bolt, the resistance can be finely adjusted after the assembly is completed; by arranging the core rod made of high-strength material for the push rod, and arranging the plastic layer outside the core rod, the strength requirement is met, and the appearance quality is ensured; by arranging the upper shell and the lower shell, and connecting the two by using the self-tapping screw, compared with the existing barrel-shaped structure electric limit stopper, the assembly quantity of the screw is significantly reduced, the production efficiency is improved, and the installation process is simplified; meanwhile, the problem that the large draft angle in the existing barrel-shaped structure limits the front and rear of the guide groove to be non-parallel, and the gap between the push rod slider and the guide groove is too large, thereby causing shaking, is solved.

[0055] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A kind of electric limit stopper for intelligent vehicle door, including shell (1), drive device (3) is arranged inside the shell (1), the output shaft of drive device (3) is connected with transmission assembly (4), transmission assembly (4) is connected with push rod device (5), it is characterized in that, The shell (1) is provided with a push rod resistance adjusting device (2), the push rod device (5) comprises a push rod (52), the push rod (52) is connected with the push rod resistance adjusting device (2), the push rod resistance adjusting device (2) comprises a fixed sliding block (21) and an adjustable sliding block (22), the fixed sliding block (21) and the adjustable sliding block (22) are oppositely arranged on both sides of the push rod (52) and are in surface contact with the push rod (52), wherein one end of the adjustable sliding block (22) away from the push rod (52) is connected with an elastic member (25), the other end of the elastic member (25) is connected with an adjusting assembly, the adjusting assembly is configured to increase or decrease the elastic potential energy of the elastic member (25) by extruding or relaxing the elastic member (25), so that the push force of the elastic member (25) applied to the adjustable sliding block is increased or decreased, and then the friction between the adjustable sliding block (22) and the fixed sliding block (21) and the push rod (52) is increased or decreased to adjust the push rod travel resistance; the driving device (3) drives the push rod device (5) to perform telescopic motion through the transmission assembly (4).

2. The electric door check for an intelligent vehicle door according to claim 1, characterized in that The adjusting assembly comprises an adjusting bolt (23) and an adjusting nut (24) fixedly arranged in the shell (1), the adjusting bolt (23) is connected with the elastic member (25), and the adjusting nut (24) is sleeved on the adjusting bolt (23).

3. The electric door check for an intelligent vehicle door according to claim 1, characterized in that, The push rod device (5) further comprises a vehicle body fixing support (51), the vehicle body fixing support (51) is connected with the push rod (52), and the push rod (52) is connected with the transmission assembly (4).

4. The electric door check for an intelligent vehicle door according to claim 1, characterized in that, The push rod (52) comprises a core rod (521), and an outer surface of the core rod (521) is provided with a plastic coating (522).

5. The electric door check for an intelligent vehicle 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 with the driving device (3), the gear transmission assembly (41) is connected with a lead screw assembly (42), a push rod nut sliding block assembly (43) is sleeved on the lead screw assembly (42), and the push rod nut sliding block assembly (43) is connected with the push rod (52).

6. The electric door check for an intelligent vehicle door according to claim 5, characterized in that The gear transmission assembly (41) comprises a first gear shaft (411) connected with the driving device (3), a first gear (412) is sleeved on the first gear shaft (411), the first gear (412) is in meshing connection 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 shell (1), the second gear (413) is in meshing connection with a third gear (415), and the third gear (415) is connected with the lead screw assembly (42).

7. The electric door check for an intelligent vehicle door according to claim 6, characterized in that The lead screw assembly (42) comprises a lead screw (421), the third gear (415) is sleeved on the lead screw (421), one end of the lead screw (421) is connected with the shell (1) through a self-lubricating bushing (423), and the other end of the lead screw (421) is connected with the shell (1) through a deep groove ball bearing (422).

8. The electric door check for an intelligent vehicle door according to claim 7, characterized in that The push rod nut sliding block assembly (43) comprises a lead screw nut (431) sleeved on the lead screw (421), and a push rod sliding block (432) is fixedly installed on the lead screw nut (431), and the push rod sliding block (432) is connected with the push rod (52).

9. The electric door check for an intelligent vehicle door according to any one of claims 1 to 8, characterized in that The shell (1) comprises an upper shell (11) and a lower shell (12), the upper shell is fixedly connected with the lower shell, a sealing assembly (13) is arranged between the upper shell (11) and the lower shell (12), and the sealing assembly (13) is used for preventing water from entering the inside of the shell (1).

10. The electric door check for an intelligent vehicle door according to claim 9, characterized in that The sealing assembly (13) comprises a water-blocking brim (132) arranged at the edge of the upper shell (11) and a water-blocking 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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