Door lock for passenger car and single sliding plug door

Abstract

The door lock comprises a spring bolt used for pressing the rear side of a door plate, a transition piece used for pushing the spring bolt to rotate behind the spring bolt, an air cylinder used for driving the transition piece to rotate and an installation base, the transition piece is a lever type transition piece, and the air cylinder is located behind the transition piece and arranged in the width direction of the door plate. A piston rod of the air cylinder makes contact with the rear end of the transition piece, and the transverse-U-shaped installation base is clamped on the upper side and the lower side of the spring bolt, the transition piece and the air cylinder and supports the spring bolt and the transition piece to rotate. The structure of the transition piece is changed into a plane lever type, meanwhile, the position of the air cylinder is changed, the air cylinder is located behind the transition piece, the front end of the spring bolt has a surplus space, the spring bolt can stretch into a narrow gap between a passenger car door plate and a door frame / car body and be buckled into the rear side of the door plate, the door plate restraining capacity is improved, the strip-shaped transition piece is adopted for transmitting air cylinder driving force, and the structure is simple; the cylinder and the lock tongue are located in the same installation space, the overall thickness of the lock is reduced, and installation and debugging are convenient.

Description

Technical Field

[0001] The invention relates to a restraint mechanism, in particular to a door lock for a passenger car, and also to a single-opening plug sliding door for a passenger car. Background Art

[0002] The locking mechanism of the existing plug-in door connects the door panel through the door carrier to achieve the locking of the door panel. However, the air duct of the public bus is generally arranged at a high position, and the design height of the door carrier is too long. The door panel is constrained by the locking mechanism, resulting in poor locking rigidity of the door panel and poor locking stability of the plug-in door during vehicle operation. For example, the locking mechanism involved in the invention patent application with publication number CN 105525833 A uses a guide lock block and a limit plate to form a falling space for the follower component. The roller falls into the trigger limit plate to block the free end of the guide stop shaft. The locking mechanism constrains the door panel through the connecting piece to restrict the door from moving back. However, the air duct of the public bus has a large drop, and the connecting piece is too long, resulting in poor rigidity of the mechanism to constrain the door panel. The vehicle has poor stability on bumpy roads and loud abnormal noises.

[0003] Some Sierra doors are equipped with vertical synchronization rod assemblies, which constrain the lower rear edge of the door panel through a locking mechanism, forming a two-point or three-point constraint with the door carrier, but the lower front edge of the door panel is weakly constrained, and the overall rigidity of the door panel is insufficient. For example, in the invention patent application with publication number CN101906916A, a lock body arranged on the door panel is used to buckle the lock on the vehicle body, and two adjustment bolts installed on the door panel respectively support the upper and lower crank structures to limit the reverse rotation of the door shaft rod, thereby limiting the reverse rotation movement of the rotating arm arranged on the upper and lower parts of the door panel. The three-point constraint of the door panel is achieved by the lateral spacing difference between the lock and the upper and lower rotating arm limit points. However, this limit point distribution has a small coverage area relative to the door panel, and the overall locking rigidity is poor. At the same time, the limit structure is complex, and the requirements for part accuracy and vehicle body contour are high, which increases the complexity and cost of the Sierra door.

[0004] In rail trains, an auxiliary restraint mechanism is added to the rear side of the door leaf to improve the sealing performance of the door leaf and the rear stiffness. For example, an intercity airtight double-opening plug sliding door system disclosed in the publication number CN 215291977 U and an adjustable speed pneumatic locking device disclosed in the utility patent application with the publication number CN216553446U, in these two schemes, the cylinder driving the lock tongue to rotate is located on the side of the lock tongue and the swing arm driving the lock tongue, and is close to the extended end of the lock tongue, and the limit pin is located in the narrow gap between the swing arm and the cylinder. Rail train door leaves have airtightness requirements, and there is an internal sealing structure on the rear side of the door leaf. The interval between the inner panel of the door and the body is large, while buses generally use an external sealing structure, and the interval on the rear side of the door panel is narrow. These two schemes have requirements for the installation space on the side of the lock tongue and are not suitable for delivery or passenger car doors; the cylinder and the lock tongue are in the upper and lower installation areas, and the cylinder needs a rotating shaft to cooperate with the drive lock tongue to rotate. The upper and lower double-layer structure makes the lock structure itself complex, increases the cost, and is not easy to debug during assembly. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a door lock suitable for a passenger car with an external sealing structure. Another purpose of the present invention is to provide a single-opening plug sliding door that improves the restraining capacity of the middle part of the door panel.

[0006] Technical solution: The present invention relates to a door lock for a bus, comprising a locking tongue for pressing the rear side of a door panel, a transition piece for pushing the locking tongue to rotate behind the locking tongue, a cylinder for driving the transition piece to rotate, and a mounting seat. The transition piece is a lever-type transition piece, the cylinder is located behind the transition piece and arranged along the width direction of the bus door panel, the cylinder piston rod is in contact with the rear end of the transition piece, and the mounting seat is a horizontal U-shaped mounting seat, which is clamped on the upper and lower sides of the locking tongue, the transition piece and the cylinder to support the rotation of the locking tongue and the transition piece.

[0007] In the present invention, the shape of the transition piece is changed to a flat lever type, and the orientation of the cylinder is changed so that the cylinder is located behind the transition piece. There is spare space at the front end of the lock tongue, which can be extended into the narrow gap between the door panel and the door frame / body of the bus and buckled into the rear side of the door panel to enhance the restraint capacity of the door panel. A strip-shaped transition piece is used to transmit the cylinder driving force, which has a simple structure and is easy to process. The cylinder and the lock tongue are located in the same installation space, which reduces the overall thickness of the lock and facilitates installation and debugging.

[0008] Preferably, the trigger end behind the lock tongue abuts against the pushing end in front of the transition piece through a roller, and the connecting line between the center of the roller shaft and the center of the transition piece shaft is used as a reference line. A stop shaft is provided in the mounting seat to prevent the contact line between the roller and the transition piece from crossing the reference line.

[0009] Preferably, the stop shaft is an eccentric stop shaft, and both ends of the stop shaft are rotatably connected to the upper and lower panels of the mounting seat respectively. By rotating the stop shaft, the distance between the contact line between the roller and the transition piece and the reference line can be adjusted.

[0010] Preferably, the lock tongue and the transition piece are respectively connected to a reset torsion spring, which is located in the mounting seat, and a through hole is provided on the closed side of the mounting seat, and the lock tongue rotates away from the rear side of the door panel, and the push end of the transition piece passes through the through hole. When the door lock performs the locking action, the reset torsion spring installed on the transmission rod and the lock tongue is in an energy storage state, and the power source is disconnected, and the reverse torque of the reset torsion spring drives the door lock out of the locked state.

[0011] Preferably, a lock hook is provided on the closed side of the mounting seat for hooking back the rear side of the door panel. The lock tongue buckles into the door panel, and the lock hook hooks back the door panel, so that the rear side of the door panel is restricted in the space restricted by the lock hook and the lock tongue, thereby ensuring the locking effectiveness.

[0012] Preferably, in order to ensure that the cylinder smoothly pushes the transition piece to rotate to a preset position and to avoid interference between the pushing end of the transition piece and the piston rod when the cylinder piston rod moves, the side wall of the pushing end of the transition piece in contact with the cylinder piston rod is an arc-shaped side wall, and the center of the arc-shaped side wall deviates from the midline of the length direction of the transition piece, so that the pushing end is close to the side wall of the cylinder and is sunken to form a groove.

[0013] Preferably, the two ends of the front side of the mounting seat are respectively provided with a first groove and a second groove for avoiding the vehicle body and the vehicle door. The first groove and the second groove form a right-angled trapezoidal protrusion on the front side of the mounting seat, and the protrusion supports the front half of the lock tongue shaft. When the door panel is closed, the lock tongue is sufficiently extended into the gap between the vehicle body and the door panel, buckled into the door panel, and the door lock presses the door panel tightly.

[0014] Preferably, a bracket connecting the upper and lower panels is provided on the opening side of the mounting seat, and the cylinder barrel of the cylinder is connected to the bracket. The bracket is a C-shaped bracket, which is similar to the mounting seat in structure but has an opening direction opposite to that of the mounting seat.

[0015] A single-opening plug door comprises the door lock and door panel of the aforementioned parts, wherein the door lock is connected to the door frame at the rear side of the door panel, and a clamping block for the clamping end in front of the lock tongue to be buckled in and a lock buckle for the aforementioned lock hook to be hooked are provided at the rear side of the door panel.

[0016] Preferably, it also includes a door frame, and a door frame rubber strip is provided on the inner periphery of the door frame located on the front side of the door panel, and a finger-guard rubber strip is provided on the front side of the door panel, and wedge-shaped blocks are provided inside the finger-guard rubber strip and inside the door frame rubber strip, respectively, and the wedge-shaped blocks push up the limiting inclined surfaces of the finger-guard rubber strip and the door frame rubber strip, and the door panel enters the door frame, and an interference fit is formed between the limiting inclined surfaces of the finger-guard rubber strip and the door frame rubber strip. The rear side of the door panel is restrained by the door lock, and a wedge-shaped limiting structure is added on the front side to improve the restraining strength of the door panel on the front and rear sides.

[0017] Preferably, a pressure plate is provided on the top of the door panel, a slideway is provided on the bottom, a balancing wheel is provided on the top of the door frame, a lower swing arm is provided on the bottom, the end of the lower swing arm extends into the support door panel to slide, the door panel enters the door frame, and the balancing wheel is tangent to the upper surface of the pressure plate. Restraint mechanisms are added to the top and bottom of the door panel to improve the longitudinal restraint capacity of the door panel.

[0018] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. It is suitable for buses with external sealing structures: the transition piece and the mounting frame are simplified in structure, the cylinder mounting position is adjusted, and the lock body can extend into the narrow gap between the bus door panel and the door frame / body; 2. The volume is reduced: the cylinder and the lock tongue are located in the same installation space, the overall thickness of the lock is reduced, and the reset torsion springs for unlocking are respectively installed and arranged on the upper and lower parts of the actuator and the transition piece, making full use of the surplus cavity space inside the door lock, and the volume of the door lock is controlled to be relatively small; 3. Ensure that the door panel is locked effectively: the door lock is installed in the middle of the rear side of the door opening, and the door panel is directly locked and constrained by a clamping method, the door panel is limited, and the locking rigidity of the door panel is improved. Two sets of reset torsion springs synchronously drive the reset action of the lock tongue and the transition piece to realize the door lock's air-off unlocking function, ensuring the unlocking reliability, and the door lock is unlocked by air. The cylinder pushes the transition piece to the "near dead point" position, reducing the demand for cylinder specifications when locking, thereby reducing the specifications of the drive components and reducing the power consumption of the door system; 4. The installation degree is adjustable: by adjusting the eccentric stop shaft to change the phase of the transition piece, thereby changing the load limit of the transition piece, the door lock can be used for door panel locking under different door opening specifications, thereby improving the versatility of the door lock; 5. Multi-directional constraints: two wedge-shaped limiting structures that cooperate with each other are provided on the upper and lower parts of the inner cavity of the door panel finger guard strip and the body door frame strip. The limiting structure avoids the anti-pinch area in the middle of the front edge to avoid pinching passengers. There is an interference fit between the wedge block and the limiting surface of the strip, so that the limiting surface of the strip forms a raised limiting point. When the door panel is closed, the limiting point of the door panel contacts and squeezes the body to form a constraint point, thereby improving the locking rigidity of the door panel. The built-in limiting structure ensures the aesthetics of the strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the locked state structure of the first embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the unlocked state structure of the first embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the adjustment principle of the first embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of the overall structure of a plug sliding door according to a second embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the matching structure of the door panel front edge and the pressure strip assembly according to the second embodiment of the present invention;

[0025] Figure 7 It is a schematic diagram of the door panel structure of the second embodiment of the present invention;

[0026] Figure 8It is a schematic diagram of the front, rear and top limiting structures of the sliding plug door according to the second embodiment of the present invention;

[0027] Fig. 9 It is a schematic diagram of the bottom limit structure of the plug sliding door according to the second embodiment of the present invention;

[0028] Fig.10 It is a schematic structural diagram of the bearing drive mechanism of the second embodiment of the present invention. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0030] Embodiment 1: The present invention discloses a door lock 5 for a passenger car door, which is mainly composed of a lock tongue 509 , a transition piece 511 , a driving cylinder 502 , and a mounting seat 501 .

[0031] With the side of the door lock 5 close to the door panel 3 as the front, the front end of the lock tongue 509 is the pressing end 5092, which is used to buckle into the rear side of the door panel 3 and press the door panel 3. The transition piece 511 is located behind the lock tongue 509, pushing the lock tongue 509 to rotate and buckle into the door panel 3. The transition piece 511 is made of a strip metal sheet to form a plane lever. The cylinder 502 is located behind the transition piece 511, that is, the transition piece 511 is located between the lock tongue 509 and the cylinder 502, transmitting the movement of the cylinder 502 to the lock tongue 509. The cylinder 502 is arranged along the width direction of the door panel 3 / the length direction of the vehicle body, and forms a certain angle or is parallel to the width direction of the door panel 3 / the length direction of the vehicle body, and the angle is less than 30°. The piston rod of the cylinder 502 contacts the push end 5111 behind the transition piece 511. The mounting seat 501 is a transverse U-shaped semi-enclosed mounting seat, which is clamped on the upper and lower sides of the lock tongue 509, the transition piece 511, and the cylinder 502, and supports the lock tongue 509 and the transition piece 511 to rotate and support the cylinder 502. The lock tongue 509 and the transition piece 511 are both connected to the inside of the mounting seat 502 and the upper and lower panels of the mounting seat 502, and a continuous transmission is formed between the end of the piston rod of the cylinder 502, the transition piece 511, and the lock tongue 509. The upper and lower panels of the open end of the mounting seat 501 are bent outwards respectively to form mounting feet connected to the vehicle body, and the fasteners pass through the mounting holes on the mounting feet of the mounting seat 501 to be fixedly connected to the vehicle body.

[0032] When the door panel 3 is closed, the piston rod of the cylinder 502 extends out, pushing the transition piece 511 to rotate, and the transition piece 511 drives the lock tongue 509 to rotate, and the pressing end 5092 of the lock tongue 509 buckles into the rear side of the door panel 3 to form a limit. The door lock 5 is arranged in the middle of the rear edge of the door opening, and the pressing end 5092 of the lock tongue of the door lock 5 squeezes the pressing block 301 arranged in the middle of the rear edge of the door panel 3, and the lock tongue buckles into the pressing block 301. The contact surface of the pressing block 301 and the pressing end 5092 is an inclined surface, so that the lock tongue 509 imposes constraints on the door panel 3 along the length and width of the vehicle. The air inlet of the cylinder 502 is equipped with a speed regulating valve for controlling the air intake speed of the cylinder and reducing the locking noise. A bracket connecting the upper and lower panels is arranged on the opening side of the mounting seat 502, and the cylinder 502 is connected to the bracket and is fixed inside the mounting seat 501. Taking the mounting seat 501 as a reference, the cylinder 502 and the locking tongue 509 are located at two opposite corners inside the mounting seat 501 , and the cylinder 502 is arranged along the opening direction of the mounting seat 502 .

[0033] The end of the locking tongue 509 close to the transition piece 511 is the trigger end 5091, and the trigger end 5091 is provided with a roller 510, and the trigger end 5091 abuts against the side wall of the transition piece 511 through the roller. With the connecting line of the center of the roller 510 and the center of the rotating shaft of the transition piece 511 as the reference line, the mounting seat 502 is provided with a stopper shaft 512 connected to its upper and lower panels to prevent the contact line between the roller 510 and the transition piece 511 (the roller 510 and the positioning end 5112 of the transition piece 511 are tangent) from crossing the reference line. The positioning end 5112 is an inclined surface, and an arc groove is provided on the side of the transition piece 511 close to the cylinder. When the car door is closed, the cylinder 502 extends out, the positioning end 5112 pushes the lock tongue 509 to rotate, the clamping end 5092 buckles into the door panel 3, and the arc groove and the blocking shaft 512 abut to form a limit; before the door panel is opened, the cylinder 502 retracts, the clamping end 5092 leaves the door panel 3, and the roller 510 rolls along the transition piece 511 and is finally located in the arc groove. The stop shaft 512 is an eccentric stop shaft, and its two ends are respectively connected to the upper and lower panels of the mounting seat 501. The lower part of the stop shaft 512 is provided with a threaded shaft structure, which can be fixed in the inner cavity of the mounting seat 501 through a nut. The upper part is a hexagonal structure, which is used to adjust the rotation angle of the stop shaft 512 and thus change the rotation phase of the transition piece 511, and change the "near dead point" degree of the load on the transition piece 511. Under the configuration of the same actuator specifications, the load-bearing capacity of the door lock 5 can be suitable for vehicles with different door opening specifications. When the door opening is relatively small, reducing the load-bearing capacity of the door lock can reduce the loss of the power source. When the door opening is relatively large, increasing the load-bearing capacity of the door panel can improve the reliability of the locking.

[0034] The end where the transition piece 511 contacts the piston rod of the cylinder 502 is the pushing end 5111, and the side wall of the pushing end 5111 is an arc-shaped side wall. The (fitting / approximate) center of the arc-shaped side wall deviates from the center line of the length direction of the transition piece 511, so that the pushing end 5111 is close to the side wall of the cylinder 502 to form a groove. The groove is used to avoid the extended piston rod of the cylinder 502 to ensure that the cylinder 501 does not interfere with the transition piece 511 after extending. When the piston rod of the cylinder 502 pushes the transition piece 511 to rotate, the front end of the piston rod can always maintain contact with the pushing end 5111, so that the lock tongue 509 can be pushed out smoothly.

[0035] The first and second grooves are respectively provided at the two ends of the front side of the mounting seat 502 for avoiding the vehicle body and the door panel. The first and second grooves form a right-angled trapezoidal protrusion on the front side of the mounting seat 502. The protrusion supports the front half of the rotation axis of the lock tongue 509. When the door panel is closed, the lock tongue 502 can extend into the gap between the vehicle body and the door panel and buckle into the rear side of the door panel.

[0036] A lock hook 508 for hooking back the rear side of the door panel is provided on the closed side of the mounting seat 502, and a lock tongue 509 is buckled into the door panel. The lock hook 508 hooks back the door panel, and the rear side of the door panel is restricted in the space restricted by the lock hook 508 and the lock tongue 509, thereby ensuring the effectiveness of locking.

[0037] The lock tongue 509 is rotatably connected to the upper and lower panels of the mounting seat 509 through the bearing shaft 506. A torsion spring 507 is sleeved on the bearing shaft 506. When the cylinder piston rod is retracted, the torsion spring 507 drives the lock tongue 509 to disengage from the door panel 3, so that the trigger end 5091 is kept in contact with the positioning end 5111 of the transition piece 511. The transition piece 511 is rotatably connected to the upper and lower panels of the mounting seat 509 through the positioning shaft 504. A torsion spring 503 is sleeved on the positioning shaft 504. When the cylinder piston rod is retracted, the torsion spring 503 drives the transition piece 511 to rotate in the opposite direction, so that the push end 5111 is kept in contact with the piston rod of the cylinder 502. A switch 505 is installed on the upper panel of the mounting seat 501. When the door panel 3 is closed, the trigger end 5091 triggers the switch 505. Torsion springs 503 and 507 are both located inside the mounting seat 501. A through hole is provided on the closed side of the mounting seat 502. When the cylinder retracts, the lock tongue 502 rotates away from the rear side of the door panel, and the push end 5111 of the transition piece 511 passes through the through hole.

[0038] refer to Figure 4, by adjusting the deflection phase of the eccentric stop shaft 512 in the door lock assembly 5, the change of the load-bearing capacity of the transition piece 511 is achieved. F1 and F2 are the load-bearing forces of the transition piece 511 on the roller 510 at the maximum adjustment angle α1 and the minimum adjustment angle α2, respectively. When F1, F2 coincide with the center line of the transition piece 511 and the roller 510 or are on the left side of the center line, the effective rotation torque of the transition piece 511 is zero, so the center line position can be called the dead point position, then α1, α2 are defined as the near dead point angles, considering the body manufacturing error and the door lock debugging error, the minimum adjustment angle α2>5°, L1, L2 are the force arms formed by the load-bearing forces F1, F2 and the rotation center of the transition piece 511, α3 is the angle deviation of the lock tongue 509 at the two extreme adjustment angles; at the two extreme adjustment angles, the force angle of the lock tongue 509 Deviation α3 is less than 1°. Within the debugging error range of the door lock, when the door lock 5 is subjected to the same resistance, F1 and F2 can be regarded as equal. The bearing capacity required by the transition piece 511 is defined as T1=F1*L1, T2=F2*L2, and the bearing force arm L1:L2=5:3, so T1=1.7*T2. There is a large adjustment range. Therefore, when the door opening is small, the specifications of the actuator can fully meet the use requirements of the door lock. The skewed stop shaft 512 can be adjusted to increase the near dead point angle α', reduce the output bearing capacity, and reduce the power source loss. When the door opening is large and there is a higher demand for the specifications of the actuator, the near dead point angle can be reduced to increase the output bearing capacity of the door lock and realize the versatility of the door lock. During the debugging process, the angle between the locking tongue pressing end 5092 and the pressing block 301 at the rear side of the door panel changes slightly, which is lower than the error of the door panel debugging installation angle, and can ensure that the pressing end 5092 is in surface contact with the pressing block 301, without affecting the stability of the door lock 5 and the reliability of the lock. The lock hook 508 is used in conjunction with the bent plate 302 at the rear edge of the door panel 3 to increase the constraint of the rear edge of the door panel and improve the strength of the door panel.

[0039] Example 2: Figures 5 to 9 The single-opening plug door is mainly composed of a bearing drive mechanism 1, a door carrying frame 2, a door panel 3, and a pressure strip assembly 7. The pressure strip assembly 7 is connected to the door frame, and the top of the door panel is connected to the bearing drive mechanism through the door carrying frame 2. The door panel 3 is driven by the bearing drive mechanism to enter or leave the door frame. A pressing block 301 is fixed to the middle of the rear side of the door panel 3 near the vehicle body, and a lock buckle 302 for cooperating with a lock hook 508 is provided on the rear inner panel of the door panel 3.

[0040] A pressure plate 307 is provided on the upper edge of the door panel 3, and a balancing wheel 4 is provided on the top of the door frame / body. When the door panel 3 is located inside the pressure strip assembly 7 of the door frame, the balancing wheel 4 contacts the upper surface of the pressure plate 307 fixed on the upper edge of the door panel 3, providing Z-direction constraint for the door panel. A mechanical lock 303 is provided on the rear edge of the door panel to limit the door panel after the vehicle stops.

[0041] A lower swing arm 8 is provided at the bottom of the door frame / vehicle body, a slideway 306 is provided at the bottom of the door panel 3, the lower swing arm 8 is fixed to the vehicle body through a swing arm seat 801, the lower swing arm 803 is hinged to the swing arm seat 801 through a pin 802, a roller 804 is installed on the swing arm 803, when the door panel 3 slides, the roller 804 moves in the lower slideway 306 of the door panel, and is used to constrain the movement trajectory of the lower part of the door panel 3. When the door panel 3 enters the door frame, the lower swing arm 8 is tightened and constrained by the lower slideway 306 of the door panel, and the lower swing arm and the slideway will not collide with each other to generate noise when the vehicle is operating on a bumpy road section.

[0042] The front edge of the door panel 3 is provided with a finger guard rubber strip 304, and the pressure strip assembly 7 of the door frame matched with the front edge of the door panel 3 is provided with a door frame rubber strip 6, and the door frame rubber strip 6 is fixed to the vehicle body through the mounting groove. A gap is left between the limiting inclined surface of the door frame rubber strip 6 and the finger guard rubber strip 304. The finger guard rubber strip 304 is provided with a wedge-shaped embedded block 305, and the embedded block 305 has an inclined surface near the outer side of the outer panel of the door panel 3. The embedded block 305 is installed in the inner cavity of the finger guard rubber strip 304 and is fixed to the door panel 3. The cross-sectional area of ​​the embedded block 305 is larger than the inner cavity area of ​​the finger guard rubber strip 304, and its inclined surface lifts up the limiting inclined surface of the finger guard rubber strip 304 to form a door panel limiting point. A wedge-shaped limiting block 9 is installed at the same height position of the inner cavity of the door frame rubber strip 6 and the embedded block 305. The limiting block 9 and the embedded block 305 have the same shape and face oppositely. The limiting block 9 is provided with an inclined surface on the side close to the door panel 3, and the inclined surface of the limiting block 9 lifts up the limiting inclined surface of the door frame rubber strip 6 to form a vehicle body limiting point. When the door panel 3 is closed, the front edge of the finger guard rubber strip 305 forms a plug-in and sealing structure with the door frame rubber strip 6, and the door panel limiting point and the vehicle body limiting point contact and squeeze each other to form a compression locking point to increase the constraint.

[0043] like Fig.10 The bearing drive mechanism 1 includes a motor assembly 101, a screw 102, a fixed frame 103, a left bracket 104, a long guide column 105, an upper slide 106, a switch assembly 107, a nut 108, a guide shaft 109, a right bracket 110, a clamping plate 111, a synchronous shaft 112, a slide cylinder 113, a hinge frame 114, a transmission frame 115, a nut sleeve 116, an end slide 117, a screw support 118, etc.

[0044] The two ends of the fixed frame 103 are respectively fixed to the left bracket 104 and the right bracket 110, and the left bracket 104 and the right bracket 110 are fixedly connected to the vehicle body to form a bearing structure for bearing the driving mechanism 1. The left and right brackets are provided with transverse end slideways 117, and the bearings at both ends of the long guide column 105 are limited in the Z direction by the upper and lower sides of the end slideway 117, and move within a certain range in the Y direction of the end slideway 117. The long guide column 105 is installed with a slide cylinder 113, which is fixed to the door carrying frame 2 and bears the weight of the door panel 3. The synchronization shaft 112 is installed in the long guide column 105 and connected to the end of the long guide column 105. The outer sides of the left and right brackets at both ends of the fixed frame 103 are respectively provided with clamping plates 111. One end of the clamping plate 111 is slidably connected to the pin shaft 109 fixed on the left / right bracket, and the other end is hinged to the synchronization shaft 112. When the long guide column 105 moves along the Y direction in the end slide 117, the pin shaft 109 can slide between the two side branches of the clamping plate 111, so that the clamping plates 111 at both ends of the long guide column 105 maintain the same phase, thereby realizing synchronous movement of the two ends of the long guide column 105.

[0045] The screw rod 102 is arranged between the left and right brackets, the motor assembly 101 is fixed on the left bracket 104, and the switch assembly 107 is arranged on one end of the fixed base close to the right bracket 110. One end of the screw rod 102 is transmission connected to the motor assembly 101, and the other end is connected to the right bracket 110 through a screw rod support 118. A nut 108 is provided on the screw rod 102, and the nut 108 is fixed to the nut sleeve 116. The nut sleeve 116 is driven by the spiral transmission pair and moves axially along the screw rod 102. When the door is closed, it moves to the bottom of the switch assembly 107 to trigger the induction switch.

[0046] The hinge frame 114 is fixed on the slide 113, and is hinged with the nut sleeve 116 through the transmission frame 115. The screw rod 102 drives the slide 113 to move along the long guide column 105 in the X direction through the nut 108, the nut sleeve 116, and the hinge frame 114. The top of the slide 113 is connected to the slideway 106 set in the fixed frame 103 through a roller, guided by the slideway 106, and the bottom is connected to the door carrying frame 2 to drive the door panel 3 to perform the door opening and closing action.

[0047] Door closing action:

[0048] When the door panel 3 is in the fully opened state, the motor assembly 101 drives the screw rod 102 to rotate forward, and the screw rod 102 moves axially along the screw rod by driving the nut sleeve 116 fixed with the nut 108. The nut sleeve 116 transmits the axial force to the slide 113 through the transmission frame 115 hinged thereto, and the slide 113 drives the door panel 3 to move along the track of the upper slide 106 through the door carrying frame 2. When the door panel 3 moves to the point where the finger guard rubber strip 304 contacts the door frame rubber strip 6, the nut sleeve 116 triggers the switch assembly 107 to generate a door in position signal. After the in position signal is received by the controller, the cylinder 502 is ventilated and extended, and the cylinder extends. The end 5021 pushes the ejection end 5111 of the transition piece 511 to drive the transition piece to rotate, and the positioning end 5112 of the transition piece 511 pushes the roller 510 in contact with it to drive the lock tongue 509 to rotate. The transition piece 511 stops when it rotates to contact the eccentric stop shaft 512. At this time, the clamping end 5092 of the lock tongue is pressed against the clamping block 301 of the door panel 3, squeezing the rear edge of the door panel to press the finger guard strip 304 against the door frame strip 6. When the trigger end 5091 of the lock tongue rotates to the switch 505 to send a trigger lock in place signal, the controller receives the signal to control the motor assembly 101 to stop moving, completing the door closing action.

[0049] Door opening action:

[0050] After receiving the unlocking signal, the controller controls the cylinder assembly 502 to cut off the air, and the transition piece 511 rotates in the opposite direction under the restoring force of the positioning torsion spring 503, so that the positioning end 5112 of the transition piece is disengaged from the roller 510, and the lock tongue 509 rotates in the opposite direction under the restoring force of the load-bearing torsion spring, and the clamping end 5092 of the lock tongue is disengaged from the clamping block 301 of the door panel 3. When the lock tongue 509 rotates to the trigger end 5091 and is out of the trigger range of the switch 502, the switch model is lost, and the controller controls the motor assembly 101 to reverse, and the slide cylinder 113 is linked to move along the trajectory of the upper slide 106 to the door opening state through the nut sleeve 116.

Claims

1. A door lock for a passenger car, comprising a lock tongue (509) for pressing the rear side of a door panel, a transition piece (511) for pushing the lock tongue to rotate behind the lock tongue, a cylinder (502) for driving the transition piece to rotate, and a mounting seat (501), characterized in that: The transition piece (511) is a lever-type transition piece. The cylinder (502) is located behind the transition piece (511) and arranged along the width direction of the bus door panel. The piston rod of the cylinder (502) contacts the rear end of the transition piece (511). The mounting seat (501) is clamped on the upper and lower sides of the lock tongue (509), the transition piece (511) and the cylinder (502) to support the rotation of the lock tongue (509) and the transition piece (511).

2. The door lock for a passenger car according to claim 1, characterized in that: The trigger end (5091) at the rear of the lock tongue (509) abuts against the push end (5111) at the front of the transition piece (511) through the roller (510), and a connecting line between the center of the roller (510) and the center of the rotating shaft of the transition piece (511) is used as a reference line. A stop shaft (512) is provided in the mounting seat (501) to prevent the contact line between the roller (510) and the transition piece (511) from crossing the reference line.

3. The door lock for a passenger car according to claim 2, characterized in that: The stop shaft (512) is an eccentric stop shaft, and both ends of the stop shaft (512) are rotatably connected to the upper and lower panels of the mounting seat (501) respectively.

4. The door lock for a passenger car according to claim 1, characterized in that: The side wall of the push end (5111) where the transition piece (511) contacts the piston rod of the cylinder (502) is an arc-shaped side wall, the center of which deviates from the center line of the transition piece (511) in the length direction, so that the push end (5111) is sunken near the side wall of the cylinder (502) to form a groove.

5. The door lock for a passenger car according to claim 1, characterized in that: The lock tongue (509) and the transition piece (511) are respectively connected to a reset torsion spring, which is located in the mounting seat (501). A through hole is provided on the closed side of the mounting seat (501). When the lock tongue (509) rotates away from the door panel, the pushing end (5111) of the transition piece passes through the through hole.

6. The door lock for a passenger car according to claim 5, characterized in that: The closed side of the mounting seat (501) is provided with a locking hook (508) for hooking back to the rear side of the door panel.

7. The door lock for a passenger car according to claim 1, characterized in that: A bracket for connecting the upper and lower panels is provided on the opening side of the mounting seat (501), and the cylinder barrel of the cylinder (502) is connected to the bracket.

8. A single-opening plug sliding door, characterized in that: It comprises the door lock and door panel as claimed in claim 1, wherein the rear side of the door panel (3) is provided with a pressing block (301) for the pressing end (5092) in front of the lock tongue (509) to buckle into.

9. The single-opening plug sliding door according to claim 8, characterized in that: The invention also comprises a door frame, wherein a door frame rubber strip (6) is arranged on the inner periphery of the door frame located on the front side of the door panel (3), a finger protection rubber strip (304) is arranged on the front side of the door panel, and wedge blocks are arranged inside the finger protection rubber strip (304) and inside the door frame rubber strip (6), respectively, and the wedge blocks push up the limiting inclined surfaces of the finger protection rubber strip (304) and the door frame rubber strip (6), and when the door panel enters the door frame, an interference fit is formed between the limiting inclined surfaces of the finger protection rubber strip and the door frame rubber strip.

10. The single-opening plug sliding door according to claim 9, characterized in that: The door panel (3) is provided with a pressure plate (307) at the top and a slideway (306) at the bottom; the door frame is provided with a balancing wheel (4) at the top and a lower swing arm (8) at the bottom, the end of the lower swing arm (8) extends into the support door panel to slide, the door panel enters the door frame, and the balancing wheel (4) is tangent to the upper surface of the pressure plate (307).

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