Intelligent locking device for cab plug door

Abstract

The application provides an intelligent locking device for a driver's room sliding door and relates to the field of sliding doors, which comprises a door frame, an L-shaped cross-section groove is concave on the inner side end surface of the door frame, a transversely arranged cross beam plate is welded at the top end of the door frame, a proximity sensor is hung by screw locking at the front side position of the middle section of the cross beam plate, two air cylinders are symmetrically fixed on the left and right sections of the front half of the cross beam plate, two obliquely arranged swing connecting rods and two L-shaped swing rods are symmetrically rotatably installed on the left and right sections of the rear half of the cross beam plate, and the first ends of the two swing connecting rods and the two L-shaped swing rods are rotatably installed with two sliding doors. Compared with the conventional sliding door which only simply uses a cylinder type power device to top-press lock the door body, the application increases the difficulty of forcibly disassembling the sliding door by implementing auxiliary plug-in fixing on the bottom of the door body, which helps to improve the locking safety performance of the two sliding doors.

Description

Technical Field

[0001] This invention relates to the field of sliding door technology, and particularly to an intelligent locking device for a driver's cab sliding door. Background Technology

[0002] As the name suggests, a sliding door is a type of door that performs both blocking and pulling actions during opening and closing. Sliding doors are widely used in passenger trains and rail transit vehicles. When closed, the outer surface of the sliding door is flush with the outer skin of the vehicle body, and when open, it overlaps with the vehicle body.

[0003] Existing sliding doors mostly use a top-swing opening and closing mechanism to connect and fix the top part of the door, which is not good for the overall stability of the door. As a result, the bottom of the door is relatively loose due to the lack of auxiliary positioning and is prone to vibration and friction noise as the train moves. Moreover, most of them simply use a cylinder-type power device to apply top pressure to the door to lock and retain the door. However, the top pressure locking force applied by the cylinder-type power device to the door is limited. When criminals work together, they may be able to pry the door open, affecting the door's locking safety performance. In addition, the anti-pinch buffer mechanism on the sliding door can still slide and move to open and close after the door is closed. This makes it easy for criminals to slide open the buffer plate and create a gap that can cause injury to the driving instruments in the driver's cab and the driver himself. Summary of the Invention

[0004] In view of this, the present invention provides an intelligent locking device for a driver's cab sliding door to solve the problem that the anti-pinch buffer mechanism configured on the sliding door can still slide and open after the door is closed, which makes it easy for criminals to slide open the buffer plate and cause damage to the driving instruments inside the driver's cab and the driver himself through the gap.

[0005] This invention provides an intelligent locking device for a driver's cab sliding door, specifically comprising: a door frame, the door frame having a U-shaped structure, and an L-shaped groove recessed on the inner end face of the door frame; a horizontally arranged cross brace plate welded to the top of the door frame; a proximity sensor being screwed and suspended at the front of the middle section of the cross brace plate; two cylinders symmetrically fixedly installed on the left and right halves of the front half of the cross brace plate; two inclined swing linkages and two L-shaped swing rods symmetrically and rotatably installed on the left and right halves of the rear half of the cross brace plate, with two sliding doors rotatably installed at the ends of the two swing linkages and two L-shaped swing rods; two driven gears being fitted onto the top ends of the rotating shafts at the tail ends of the two L-shaped swing rods; a piston rod slidably installed at the center of each of the two cylinders; a positioning screw sleeve being screwed onto the first end of each of the two piston rods; and... A top ring is welded and fitted onto the portion of the sliding door that is far from the two positioning screw sleeves; two long rectangular grooves are provided on the outer edge of the joint portion of the two sliding doors, and two buffer plates are slidably installed in the two long rectangular grooves; two L-shaped racks are symmetrically slidably installed on the top of the cross brace plate, and the two L-shaped racks mesh with two driven gears for transmission; a slip ring is welded to the head end of each of the two L-shaped racks, and the two piston rods are connected to the two slip rings through, and a spring is fitted on the piston rod between the slip ring and the positioning screw sleeve; when the two sliding doors are closed, they are joined together and sealed against the L-shaped groove; a rectangular protective cover is welded to the inner side of each of the two sliding doors, and two U-shaped plug-in positioning parts are slidably installed on the lower half of the two sliding doors, and four plug rods on the plug-in positioning parts slide down and plug into the bottom contact rod of the door frame.

[0006] Furthermore, an electrical control box is installed at the top of the middle section of the cross brace beam. The proximity sensor is electrically connected to two cylinders through the intelligent control module inside the electrical control box, and the two sliding doors are controlled to open and close via a button switch in the driver's cab.

[0007] Furthermore, two U-shaped sliding frames are welded to the inner sides of the two buffer plates in a left-right orientation, and four sets of positioning lugs are symmetrically welded to the inner end faces of the two sliding doors near the two long rectangular grooves. The two U-shaped sliding frames are slidably engaged with the four sets of positioning lugs by spring push.

[0008] Furthermore, on the inner end face of the two sliding doors, near the four sets of positioning lugs, four vertically arranged insert shafts are slidably installed by spring push. The four insert shafts slide in opposite directions and are engaged with the tail ends of the upper and lower sliding shafts of the two U-shaped sliding frames. The tail ends of the four insert shafts are rotatably connected to four connecting rods in opposite directions.

[0009] Furthermore, two vertical synchronizing rods are rotatably connected between the tail sections of the four connecting rods in a left-right correspondence. Two driving rods are welded to the middle sections of the two vertical synchronizing rods in a left-right orientation, and two pull rods are connected to the bottom sections of the two vertical synchronizing rods in a left-right orientation. The tail ends of the two pull rods are rotatably connected to two plug-in positioning parts.

[0010] Furthermore, the drive rod has a Z-shaped continuous bend structure, and two rod sleeves are welded to the top of the inner end face of the two sliding doors. The top horizontal part of the two drive rods slides through and engages with the two rod sleeves.

[0011] Furthermore, a strip-shaped track groove is provided through the middle part of the cross brace beam plate, and two relay drive rods are symmetrically slidably installed in the strip-shaped track groove. The relay drive rods have a continuous vertical bend structure.

[0012] Furthermore, a force-bearing ring is welded to the tail end of the relay drive rod, and the vertical support part at the head end of the relay drive rod slides in conjunction with the strip track groove. A partition is welded in the middle section of the strip track groove, and two tension springs are symmetrically connected between the partition and the two vertical support parts of the relay drive rod.

[0013] Furthermore, the force-bearing rings at the two ends of the relay drive rods are in sliding engagement with the two piston rods, and the two top rings slide outwards from the left and right and abut against the two force-bearing rings.

[0014] Furthermore, the bottom ends of the vertical support portions of the two relay drive rods protrude from the strip track groove, and the vertical support portions at the beginning of the two relay drive rods slide in opposite directions to abut against the top vertical support portions of the two drive rods on the left and right.

[0015] Beneficial effects

[0016] 1. In this invention, two insertion positioning components can provide auxiliary insertion positioning for the bottom parts of the two sliding doors in the closed state. Compared with sliding doors that only use a top swing mechanism to connect and fix the door body as a whole, the overall stability of the door body is better. This avoids the bottom of the door body from being relatively loose due to the lack of auxiliary positioning, causing vibration, friction, and noise as the train moves. Moreover, compared with traditional sliding doors that simply use a cylinder-type power device to press and lock the door body, the auxiliary insertion and fixing of the bottom of the door body in this invention increases the difficulty of the sliding door being forcibly disassembled, which helps to improve the locking safety performance of the two sliding doors.

[0017] 2. In this invention, two buffer plates are installed by springs on two U-shaped sliding frames, which can provide cushioning protection for arms, torsos, legs, and feet that are accidentally trapped between the two buffer plates, preventing serious pinching injuries. The two piston rods transmit power through springs and two L-shaped racks, which allows the two sliding doors to compress the springs and elastically shift during the closing process, providing secondary pinching protection for personnel (especially after the two buffer plates are pushed back by the pinching force to retract and slide to their maximum stroke). This, combined with the two buffer plates, can minimize the pinching injuries suffered by personnel, providing excellent anti-pinch protection.

[0018] 3. In this invention, after the two sliding doors are closed, four pivot pins can slide and position the two U-shaped sliding frames and the two buffer plates in opposite directions. This prevents the two buffer plates from being in a slidable and displaceable state after the two sliding doors are closed, thus preventing criminals from causing harm to the driving instruments and the driver in the driver's cab through the gaps created by the sliding opening of the two buffer plates (such as releasing toxic gases into the driver's cab). This allows the sliding doors to have good anti-pinch protection performance while maintaining a good safety protection effect.

[0019] 4. This invention eliminates the need to configure drive motors for the buffer plate and the insertion positioning components at the bottom of the door. The automatic triggering and stopping (automatic extension and retraction) of the buffer plate and the insertion positioning components at the bottom of the door is achieved entirely through the reasonable configuration of mechanical components. This eliminates the need to configure automated electronic control devices (such as various sensors and control instruments that match the sensors) for the insertion positioning components, which helps to reduce costs and increase efficiency of the locking device as a whole. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0021] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0022] In the attached diagram:

[0023] Figure 1 This is a schematic diagram of the front structure of the door frame according to an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the protective cover structure according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the bottom side structure of the cross bracing beam plate according to an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the proximity sensor installation location structure according to an embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the door frame structure according to an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the inner structure of a sliding door according to an embodiment of the present invention.

[0029] Figure 7 This is a schematic diagram of the sliding installation of the buffer plate according to an embodiment of the present invention.

[0030] Figure 8 This is a schematic diagram of the buffer plate structure according to an embodiment of the present invention.

[0031] Figure 9 This is a schematic diagram of the drive rod structure according to an embodiment of the present invention.

[0032] Figure 10 This is an embodiment of the present invention. Figure 3 Enlarged structural diagram of section B.

[0033] Figure 11 This is an embodiment of the present invention. Figure 5 Enlarged structural diagram of section A.

[0034] List of reference numerals

[0035] 1. Door frame; 101. Cross brace beam; 102. Rack; 103. Relay drive rod; 104. L-shaped swing arm; 105. Swing linkage; 106. Driven gear; 107. Strip track groove; 2. Sliding door; 201. Protective cover; 202. Insert positioning component; 203. Positioning lug; 204. Insert shaft; 205. Connecting rod; 206. Vertical synchronizing rod; 207. Drive rod; 208. Pull rod; 3. Cylinder; 301. Piston rod; 302. Positioning screw sleeve; 303. Top ring; 4. Buffer plate; 401. U-shaped sliding frame; 5. Proximity sensor. Detailed Implementation

[0036] To make the objectives, solutions, and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention.

[0037] Example: Please refer to Figures 1 to 11 As shown:

[0038] This invention provides an intelligent locking device for a driver's cab sliding door, comprising a door frame 1, the door frame 1 having a U-shaped structure, and an L-shaped groove recessed on the inner end face of the door frame 1. A transversely arranged crossbeam 101 is welded to the top of the door frame 1, and a proximity sensor 5 is screwed and suspended at the front of the middle section of the crossbeam 101. Two cylinders 3 are symmetrically fixedly installed on the left and right halves of the front half of the crossbeam 101. Two inclined swing linkages 105 and two L-shaped swing rods 104 are symmetrically rotatably installed on the left and right halves of the rear half of the crossbeam 101, and two sliding doors 2 are rotatably installed at the ends of the two swing linkages 105 and the two L-shaped swing rods 104. Two driven gears 106 are fitted at the top of the rotating shafts at the tail ends of the two L-shaped swing rods 104. A piston rod 301 is slidably installed at the center of each of the two cylinders 3. Each of the two piston rods 301 has a positioning sleeve 302 screwed onto its first end section, and a top ring 303 is welded onto the portion of each piston rod 301 away from the positioning sleeves 302. Through the power transmission of the two positioning sleeves 302, the two top rings 303, and the two springs placed between them, the two cylinders 3 and the two piston rods 301 can slide backwards and forwards towards each other using two L-shaped racks 102; the two connecting parts of the sliding doors 2... Two long rectangular slots are provided at the outer eaves, and two buffer plates 4 are slidably installed in the two long rectangular slots facing each other; two L-shaped racks 102 are slidably installed on the top of the cross brace 101, and the two L-shaped racks 102 mesh with two driven gears 106 for transmission. The two L-shaped racks 102 can mesh with each other to drive the two driven gears 106 and the two L-shaped swing rods 104 to swing forward and backward to control the opening and closing of the two sliding doors 2.Each of the two L-shaped racks 102 has a slip ring welded to its head end, and the two piston rods 301 are engaged with the two slip rings. A spring is fitted on the piston rod 301 between the slip ring and the positioning screw sleeve 302. When the piston rod 301 retracts and slides towards the cylinder 3, the positioning screw sleeve 302 transmits the top pressure to the L-shaped rack 102 through the spring, driving the L-shaped rack 102 to slide away from the strip track groove 107. The L-shaped rack 102 can engage and control the two L-shaped swing arms 104 and the sliding door 2 to swing and close towards the inside of the door frame 1. When the sliding door 2 closes and abuts against the door frame 1, the pressure from the door frame 1... The blocking and limiting force is transmitted in the opposite direction to the L-shaped rack 102, keeping the L-shaped rack 102 fixed. After the L-shaped rack 102 is fixed, as the piston rod 301 continues to contract, the sliding positioning sleeve 302 compresses the spring and drives the top ring 303 to abut against the force ring at the tail end of the relay drive rod 103, pushing and driving the relay drive rod 103 to stretch the tension spring and slide away from the strip track groove 107. As the relay drive rod 103 continues to slide, its first vertical support part abuts against the top vertical support part of the drive rod 207 and pushes and drives the drive rod 207 away from the buffer plate 4. The piston rod 301 provides the driving force for the insertion shaft 204 and the insertion positioning component 202 to be fixed in place. When the piston rod 301 slides out and pushes to open the sliding door 2, the spring on the insertion shaft 204 and the tension spring on the L-shaped rack 102 will rebound to drive the insertion shaft 204 and the insertion positioning component 202 to reset and release, and drive the L-shaped rack 102 to slide back to reset. This eliminates the need to configure an additional drive motor for the buffer plate 4 and the insertion positioning component at the bottom of the door. Moreover, the automatic triggering start and stop (automatic extension and retraction) of the buffer plate 4 and the insertion positioning component at the bottom of the door is achieved entirely by the reasonable configuration of mechanical components, eliminating the need to configure an additional drive motor for the insertion positioning component. Automated electronic control devices (such as various sensors and control instruments associated with the sensors) help reduce costs and increase efficiency in the overall locking device. In addition, the two piston rods 301 transmit power to the two L-shaped racks 102 through the springs on them. This allows the two sliding doors 2 to elastically shift and open and close to a certain extent during the closing process, which can provide secondary clamping and buffering for personnel (especially after the two buffer plates 4 are driven by the clamping and counter-pushing force to retract and slide to the maximum stroke). This, combined with the two buffer plates 4, can minimize the clamping injury to personnel, and the anti-pinch protection effect is outstanding.When closed, the two sliding doors 2 are joined together and sealed against the L-shaped groove. A rectangular cover 201 is welded to the inner side of each sliding door 2. These covers conceal all the drive and positioning mechanisms on the door, making the inner end face of the door smooth and aesthetically pleasing. Two U-shaped insertion positioning components 202 are slidably installed on the lower half of each sliding door 2. Four insert rods on the insertion positioning components 202 slide downwards and engage with the bottom contact rod of the door frame 1. The two insertion positioning components 202 can maintain stability when closed. The bottom sides of both sliding doors 2 are equipped with auxiliary insertion and positioning. Compared to sliding doors 2 that only use a top swing mechanism to connect and fix the door body as a whole, this provides better overall stability of the door body. It avoids the bottom of the door body from becoming loose due to the lack of auxiliary positioning, which can cause vibration, friction, and noise as the train moves. Furthermore, compared to traditional sliding doors 2 that simply use a cylinder-type power device to press and lock the door, this invention's auxiliary insertion and fixing at the bottom of the door body increases the difficulty of forcibly disassembling the sliding door 2, thus improving the locking safety performance of both sliding doors 2.

[0039] An electrical control box is installed at the top of the middle section of the cross brace beam 101. The proximity sensor 5 is electrically connected to the two cylinders 3 through the intelligent control module inside the electrical control box. The two sliding doors 2 are controlled to open and close by a button switch in the driver's cab. When the proximity sensor 5 detects a person, obstacle, or arm or leg that is not pulled out in time and is stuck in the doorway inside the door frame 1, it will control the two cylinders 3 through the intelligent control module to stop pushing the two sliding doors 2 to close and reset the two sliding doors 2 to open, so as to avoid continuous crushing injury to the personnel.

[0040] The inner sides of the two buffer plates 4 are welded with two U-shaped sliding frames 401 facing each other. Four sets of positioning lugs 203 are symmetrically welded on the inner end faces of the two sliding doors 2 near the two long rectangular grooves. The two U-shaped sliding frames 401 are slidably engaged with the four sets of positioning lugs 203 by spring push. The two buffer plates 4 are installed by spring elastic push on the two U-shaped sliding frames 401. This can provide cushioning protection for arms, torsos, legs and feet that are accidentally trapped between the two buffer plates 4, and avoid serious crushing injuries to personnel.

[0041] Among them, four vertically arranged insert shafts 204 are installed on the inner end face of the two sliding doors 2 near the four sets of positioning lugs 203 by spring pushing and sliding. The four insert shafts 204 slide vertically and engage with the tail ends of the upper and lower sliding shafts of the two U-shaped sliding frames 401. After the two sliding doors 2 are closed, the four insert shafts 204 can slide vertically and engage with the two U-shaped sliding frames 401 and the two buffer plates 4 to prevent the two buffer plates 4 from being in a slidable displacement state after the two sliding doors 2 are closed. This prevents criminals from causing harm to the driving instruments and the driver in the driver's cab through the gap created by the sliding opening of the two buffer plates 4 (such as releasing toxic gases into the driver's cab). This ensures that the sliding doors 2 have good anti-pinch protection performance while maintaining a good safety protection effect. In addition, the tail ends of the four insert shafts 204 are connected to four connecting rods 205 in a vertically opposing rotation.

[0042] Among them, the tail sections of the four connecting rods 205 are rotatably connected to two vertical synchronizing rods 206 in a left-right correspondence. Two drive rods 207 are welded to the middle sections of the two vertical synchronizing rods 206 in a left-right orientation. Two pull rods 208 are connected to the bottom sections of the two vertical synchronizing rods 206 in a left-right orientation. The tail ends of the two pull rods 208 are rotatably connected to two insertion positioning parts 202. The four connecting rods 205, the two vertical synchronizing rods 206, and the four insertion shafts 204 together form a four-crank slide mechanism. Through this four-mechanism, two cranks slide in a left-right orientation. The vertical synchronizing rod 206 can push and drive the four insertion shafts 204 to slide up and down, thereby tightening and loosening the two U-shaped sliding frames 401 and the two buffer plates 4. In addition, the two vertical synchronizing rods 206, the two pull rods 208, and the two insertion positioning parts 202 are connected to form two crank-slider mechanisms. Through these two mechanisms, the two vertical synchronizing rods 206 can slide in opposite directions to push and drive the two insertion positioning parts 202 to slide up and down to tighten and loosen. In addition, the two vertical synchronizing rods 206 can slide in opposite directions to control the four insertion shafts 204 and the two insertion positioning parts 202 to slide in and out and tighten synchronously.

[0043] The drive rod 207 has a Z-shaped continuous bend structure, and two rod sleeves are welded to the top of the inner end face of the two sliding doors 2. The top horizontal part of the two drive rods 207 slides through and engages with the two rod sleeves. A strip track groove 107 is opened through the middle part of the cross brace beam 101. Two relay drive rods 103 are symmetrically slidably installed in the strip track groove 107. The relay drive rods 103 have a continuous vertical bend structure. A force-bearing ring is welded to the tail end of the relay drive rod 103, and the vertical support part of the head end of the relay drive rod 103 is connected to the strip track groove 107. The two relay drive rods 103 are symmetrically connected by two tension springs: a partition block is welded to the middle section of the strip track groove 107, and the partition block is symmetrically connected to the vertical support parts of the two relay drive rods 103; the force rings at the beginning of the two relay drive rods 103 are slidably connected to the two piston rods 301, and the two top rings 303 slide outwards to the left and right and abut against the two force rings; the bottom of the vertical support parts of the two relay drive rods 103 protrudes from the strip track groove 107, and the vertical support parts at the beginning of the two relay drive rods 103 slide outwards to the left and right and abut against the top vertical support parts of the two drive rods 207.

[0044] The specific usage and function of this embodiment: In this invention, the two protective covers 201 can cover all the drive positioning mechanisms on the door body inside, making the inner end face of the door body flat and beautiful. When the proximity sensor 5 detects that there is a person, obstacle or arm or leg stuck in the doorway inside the door frame 1, the intelligent control module will control the two cylinders 3 to stop pushing the two sliding doors 2 to close and reset the two sliding doors 2 to open, so as to avoid continuous pinching injury to the personnel.

[0045] Through the power transmission of two positioning screw sleeves 302, two top rings 303 and two springs placed between them, two cylinders 3 and two piston rods 301 can slide and extend, and two L-shaped racks 102 slide towards each other. The two L-shaped racks 102 can mesh and drive two driven gears 106 and two L-shaped swing rods 104 to swing forward and backward to control the opening and closing of two sliding doors 2. Two buffer plates 4 are installed by spring elastic push and sliding on two U-shaped sliding frames 401, which can provide buffer protection for arms, torsos, legs and feet that are accidentally caught between the two buffer plates 4.

[0046] After the two sliding doors 2 are closed, the four insert shafts 204 can slide and position the two U-shaped sliding frames 401 and the two buffer plates 4 in opposite directions. This prevents the two buffer plates 4 from being in a slidable and displaceable state after the two sliding doors 2 are closed, and prevents criminals from causing damage to the driving instruments inside the driver's cab and the driver himself through the gaps created after the two buffer plates 4 are slid open. The two insertion positioning parts 202 can provide auxiliary insertion and positioning for the bottom part of the two sliding doors 2 in the closed state.

[0047] Four connecting rods 205, two vertical synchronizing rods 206, and four insert shafts 204 are connected to form a four-crank slide mechanism. Through this four-mechanism, the two vertical synchronizing rods 206 can slide up and down to push the four insert shafts 204 to tighten or loosen the two U-shaped sliding frames 401 and the two buffer plates 4. In addition, the two vertical synchronizing rods 206, two pull rods 208, and two plug-in positioning parts 202 are connected to form two crank slider mechanisms. Through this two-mechanism, the two vertical synchronizing rods 206 can slide up and down to push the two plug-in positioning parts 202 to tighten or loosen. Thus, the two vertical synchronizing rods 206 can synchronously control the tightening or loosening of the four insert shafts 204 and the two plug-in positioning parts 202.

[0048] When the piston rod 301 retracts and slides towards the cylinder 3, the positioning sleeve 302 transmits the top pressure to the L-shaped rack 102 through the spring, driving the L-shaped rack 102 to slide away from the strip track groove 107. The L-shaped rack 102 can engage and control the two L-shaped rocker arms 104 and the sliding door 2 to swing and close towards the inside of the door frame 1. When the sliding door 2 closes and abuts against the door frame 1, the blocking and limiting force from the door frame 1 is transmitted in reverse to the L-shaped rack 102, limiting and fixing the L-shaped rack 102. After the L-shaped rack 102 is limited and fixed, as the piston rod 301 continues to retract and slide, the positioning sleeve 302 will compress the spring and drive the top ring 303 to engage with the cylinder 304. The force ring at the tail end of the relay drive rod 103 abuts against and pushes the relay drive rod 103 to stretch the tension spring away from the strip track groove 107 and slide away. As the relay drive rod 103 continues to slide, the vertical support part at its head end abuts against and pushes the vertical support part at the top of the drive rod 207 to push the drive rod 207 away from the buffer plate 4 and slide away to provide the driving force for the insertion shaft 204 and the insertion positioning member 202 to be inserted and fixed. When the piston rod 301 slides out and pushes to open the plug door 2, the spring on the insertion shaft 204 and the tension spring on the L-shaped rack 102 will rebound to drive the insertion shaft 204 and the insertion positioning member 202 to reset and loosen, and drive the L-shaped rack 102 to slide back and reset.

Claims

1. An intelligent locking device for a driver's cab sliding door, characterized in that, include: The door frame (1) and positioning lugs (203) are provided. The door frame (1) has a U-shaped structure and an L-shaped groove is recessed on the inner end face of the door frame (1). A horizontally arranged cross bracing plate (101) is welded to the top of the door frame (1). A proximity sensor (5) is suspended by screws at the front side of the middle section of the cross bracing plate (101). Two cylinders (3) are symmetrically fixed on the left and right halves of the front half of the cross bracing plate (101). The left and right halves of the rear half of the cross bracing plate (101) rotate symmetrically. Two inclined swing linkages (105) and two L-shaped swing arms (104) are installed, and two sliding doors (2) are rotatably installed at the head ends of the two swing linkages (105) and the two L-shaped swing arms (104). Two driven gears (106) are fitted at the top of the shafts at the tail ends of the two L-shaped swing arms (104). A piston rod (301) is slidably installed at the center of each of the two cylinders (3). A positioning screw sleeve (302) is screwed onto the head end of each of the two piston rods (301). The piston rods (301) are far from the center of each cylinder. A top ring (303) is welded onto each of the two positioning screw sleeves (302); two long rectangular grooves are provided on the outer edge of the two connecting parts of the sliding door (2), and two buffer plates (4) are slidably installed in the two long rectangular grooves; two L-shaped racks (102) are symmetrically slidably installed on the top of the cross brace plate (101), and the two L-shaped racks (102) mesh with two driven gears (106); a slip ring is welded to the head of each of the two L-shaped racks (102), and two piston rods (303) are also provided with the slip ring. 1) It is fitted with two slip rings, and a spring is fitted on the piston rod (301) between the slip ring and the positioning screw sleeve (302); when the two sliding doors (2) are closed, they are joined together and sealed against the L-shaped groove. A rectangular protective cover (201) is welded on the inner side of each of the two sliding doors (2), and two U-shaped plug-in positioning parts (202) are slidably installed on the lower half of the two sliding doors (2). The four plug rods on the plug-in positioning parts (202) slide down and are plugged into the bottom ground contact rod of the door frame (1); On the inner end face of the two sliding doors (2) near the four sets of positioning lugs (203), four vertically arranged insert shafts (204) are slidably installed by spring push. The four insert shafts (204) slide up and down in opposite directions and are engaged with the tail ends of the upper and lower sliding shafts of the two U-shaped sliding frames (401). The tail ends of the four insert shafts (204) are rotatably connected to four connecting rods (205) in opposite directions. Two vertical synchronizing rods (206) are rotatably connected to the tail sections of the four connecting rods (205) in a left-right correspondence. Two driving rods (207) are welded to the middle sections of the two vertical synchronizing rods (206) in a left-right orientation. Two pull rods (208) are connected to the bottom sections of the two vertical synchronizing rods (206) in a left-right orientation. The tail ends of the two pull rods (208) are rotatably connected to the two plug-in positioning parts (202). The drive rod (207) has a Z-shaped continuous bend structure, and two rod sleeves are welded to the top of the inner end face of the two sliding doors (2). The top horizontal part of the two drive rods (207) slides through the two rod sleeves. A strip track groove (107) is provided through the middle part of the cross bracing beam plate (101). Two relay drive rods (103) are slidably installed in the strip track groove (107) in a left-right symmetrical manner. The relay drive rods (103) have a continuous vertical bend structure. The tail end of the relay drive rod (103) is welded with a force ring, and the vertical support part at the head end of the relay drive rod (103) slides in cooperation with the strip track groove (107). A partition is welded in the middle section of the strip track groove (107), and two tension springs are symmetrically connected between the partition and the two vertical support parts of the relay drive rod (103). The force-bearing rings at the beginning of the two relay drive rods (103) are in sliding fit with the two piston rods (301), and the two top rings (303) slide outwards to the left and right and abut against the two force-bearing rings. The bottom ends of the vertical support portions of the two relay drive rods (103) protrude from the strip track groove (107), and the vertical support portions at the beginning of the two relay drive rods (103) slide in opposite directions to abut against the top vertical support portions of the two drive rods (207).

2. The intelligent locking device for the driver's cab sliding door as described in claim 1, characterized in that: An electrical control box is installed at the top of the middle section of the cross brace beam (101). The proximity sensor (5) is electrically connected to two cylinders (3) through the intelligent control module inside the electrical control box, and the two sliding doors (2) are controlled to open and close by a button switch in the driver's cab.

3. The intelligent locking device for the driver's cab sliding door as described in claim 1, characterized in that: Two U-shaped sliding frames (401) are welded to the inner sides of the two buffer plates (4) in opposite directions. Four sets of positioning lugs (203) are symmetrically welded to the inner end faces of the two sliding doors (2) near the two long rectangular grooves. The two U-shaped sliding frames (401) are in sliding cooperation with the four sets of positioning lugs (203) through spring push.

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