A self-locking electric control door lock for commercial vehicles

Abstract

The present invention discloses a self-locking electric door lock for commercial vehicles, including a locking assembly and an electric control assembly. The locking assembly includes a door lock mechanism for achieving a locking effect between a door and a body and an unlocking mechanism for completing an unlocking process, and the door lock mechanism and the unlocking mechanism are connected by transmission; the electric control assembly includes a locking mechanism for achieving automatic locking, a control mechanism for completing unlocking mode switching, and a corresponding control circuit, and the locking mechanism is connected by transmission to the door lock mechanism, and the control mechanism and the locking mechanism are electrically connected through a control circuit. The present invention automatically locks when the door is closed to achieve a locking effect between the door and the body; by setting a locking mechanism, an automatic locking effect can be achieved to avoid abnormal opening of the door due to misoperation by personnel; by setting a control mechanism, a mode switching function of multiple locking effects can be achieved, thereby improving the safety protection effect of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of electric-controlled door locks, and in particular to a self-locking electric-controlled door lock for commercial vehicles. Background Art

[0002] There are many types of commercial vehicles, and the door lock structures they use also vary according to their purpose and design. Since electric door locks have higher security and stability than mechanical door locks and can be integrated with other electronic systems in the vehicle, most commercial vehicles use electric door locks.

[0003] After searching, the Chinese patent with publication number CN114961451B includes a housing, a lock port for inserting a car door bolt is arranged on the housing, a locking mechanism, an unlocking mechanism, and a PCB hardware control system module are arranged in the housing; the locking mechanism includes a ratchet-type lock tongue corresponding to the position of the lock port and a pawl matched with the lock tongue; the unlocking mechanism includes a motor, a return wheel, a sector gear, a rocker arm, a push rod, and a lever arm, and a position sensor of the sector gear and a position sensor of the lock tongue are arranged in the housing, and both position sensors are electrically connected to the PCB hardware control system module, and at the same time, a manual unlocking wire is also connected in parallel to the lever arm. The interlocking transmission mechanism composed of the sector gear, the rocker arm, the push rod, and the lever arm in the above patent not only rigidly transmits the motor action to the pawl to realize the rapid and reliable unlocking of the car door, but also ensures the reliable isolation of the unlocking mechanism and the locking action of the locking mechanism, prevents the interference of the unlocking mechanism on the locking action of the lock tongue and the impact of the lock tongue on the unlocking mechanism when the lock tongue is locked, and provides a guarantee for the long-term stable operation of the door lock structure.

[0004] However, the above patent lacks the function of automatic locking, that is, during the driving process after the vehicle is started, passengers can still open the door by manually pulling the rope, thereby increasing the risk of abnormal opening of the door due to human misoperation; on the other hand, the unlocking effect in the above patent is single, resulting in low safety performance of the device, and it is difficult to achieve the expected protection effect when the commercial vehicle is parked for a long time or unattended. Summary of the invention

[0005] The purpose of the present invention is to provide a self-locking electric door lock for commercial vehicles, which has the advantages of automatic locking and mode adjustment and solves the problems raised in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a self-locking electric door lock for commercial vehicles, comprising a locking assembly and an electric control assembly, wherein the locking assembly comprises a door locking mechanism for achieving a locking effect between a door and a vehicle body and an unlocking mechanism for completing an unlocking process, wherein the door locking mechanism and the unlocking mechanism are transmission-connected;

[0007] The electric control component includes a locking mechanism for realizing automatic locking, a control mechanism for completing unlocking mode switching, and a corresponding control circuit. The locking mechanism is transmission-connected to the door lock mechanism, and the control mechanism is electrically connected to the locking mechanism through the control circuit.

[0008] Preferably, the door lock mechanism includes two handles respectively located on the inside and outside of the vehicle door, an electric control shaft is arranged on the opposite surfaces of the handles, a disc spring is fixedly connected to the outer contour of the electric control shaft, a ratchet is clamped on the outer contour of the disc spring, a tension spring is fixedly connected to the ratchet groove of the ratchet, the other end of the tension spring is fixedly connected to a bearing roller and the bearing roller is also located in the ratchet groove of the ratchet, a bearing sleeve is unidirectionally connected to the outer contour of the ratchet, a bevel gear 1 is fixedly connected to the opposite surfaces of the bearing sleeve, a positioning shaft 1 is coaxially penetrated by the bevel gear 1 and rotatably connected, and the positioning shaft 1 is fixedly arranged inside the vehicle door.

[0009] Preferably, the unlocking mechanism includes a positioning shaft 2 that passes through horizontally and is rotatably connected to the positioning shaft 1, one end of the positioning shaft 2 is fixedly connected to a connecting rod extending downward, the other end of the connecting rod is fixedly connected to an inclined locking lever 1, a bevel gear 2 passes through and is rotatably connected to the outer contour of the positioning shaft 2, and the bevel gear 2 is meshed with and transmission connected to the two bevel gears 1, the end of the bevel gear 2 close to the connecting rod is fixedly connected to a transmission ring sleeved on the outer contour of the positioning shaft 2, the bottom end of the transmission ring is fixedly connected to a lock tongue, the outer contour of the transmission ring is fixedly connected to an inclined locking lever 2, a door bolt is clamped on the outer contour of the lock tongue and the door bolt is fixedly set on the vehicle body, and the inclination angles of the locking lever 1 and the locking lever 2 are both set to forty-five degrees.

[0010] Preferably, the locking mechanism includes a door shaft for connecting the vehicle door to the vehicle body, an electromagnet 1 arranged inside the vehicle door is penetrated through and rotatably connected to the outer contour of the middle section of the door shaft, a return spring is fixedly connected to the outer contour of the electromagnet 1, the other end of the return spring is fixedly connected to the electromagnet 2, the other end of the electromagnet 2 is limitedly rotatably connected to the bevel gear 3 and the bevel gear 3 is penetrated and sleeved on the outer contour of the positioning shaft 2, a spline pin is fixedly connected to the inside of the bevel gear 3 and the spline pin is slidably connected to the inside of the spline groove.

[0011] Preferably, an angle sensor is provided inside the door shaft and the sensor is configured to monitor the rotation angle of the electromagnet on the door shaft.

[0012] Preferably, the control mechanism includes a knob arranged at the driving position in the vehicle body, the top of the knob is fixedly connected to a fixing seat, the top of the fixing seat is penetrated by and slidably connected with a push switch, a compression spring located inside the fixing seat is fixedly connected between the bottom end of the push switch and the top end of the knob, the bottom end of the knob is rotatably connected to a scale ring and the scale ring is fixedly connected to the inside of the vehicle body, four limit grooves are arranged in an annular shape at equal intervals on the inner contour of the scale ring, a positioning pin is slidably connected inside the limit groove, and a compression spring located inside the limit groove is fixedly connected between the positioning pin and the inner contour of the scale ring.

[0013] Preferably, the control mechanism also includes a limit plate arranged inside the knob, a connecting shaft is clamped at the axis center of the top end of the limit plate and the connecting shaft is fixedly connected to the inner contour of the knob, a fixing ring is fixedly connected to the outer contour of the connecting shaft, a positioning lever is fixedly connected to the outer contour of the fixing ring, a fixing pin 1 is fixedly connected to the top end of the limit plate, a fixing pin 2 is fixedly connected to the upper surface of the positioning lever away from the fixing ring, a connecting spring is fixedly connected between the fixing pin 1 and the fixing pin 2, a T-shaped electric contact plate is fixedly connected to the bottom end of the limit plate, a positioning groove is provided on the outer contour of the limit plate, and the positioning groove is consistent with the positioning pin in specifications.

[0014] Preferably, the control circuit includes a series circuit for electrically connecting the door shaft, electromagnet 1, return spring and push switch, and a parallel circuit for electrically connecting the T-shaped electric contact plate and the two electric control shafts.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention provides a locking assembly to automatically lock the vehicle door when the vehicle door is closed to achieve a locking effect of the vehicle door and the vehicle body.

[0017] The present invention can achieve an automatic locking effect by arranging a locking mechanism. At this time, the handle cannot control the locking assembly to unlock, so as to avoid abnormal opening of the door due to misoperation by personnel.

[0018] The present invention realizes a mode switching function of multiple locking effects by setting a control mechanism to meet different usage scenarios, thereby improving the safety protection effect of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 It is a cross-sectional view of the main structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the door lock mechanism of the present invention;

[0022] Figure 4 This is a schematic diagram of the unlocking mechanism of the present invention;

[0023] Figure 5 This is a schematic diagram of the locking mechanism of the present invention;

[0024] Figure 6 It is an exploded diagram of the control mechanism of the present invention;

[0025] Figure 7 It is a schematic diagram of the internal structure of the control mechanism of the present invention;

[0026] Figure 8 This is a logic circuit diagram of the locking mechanism of the present invention;

[0027] Fig. 9 This is the mode switching logic circuit diagram of the present invention. DETAILED DESCRIPTION

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

[0029] See also Figures 1 to 9 The present invention provides a technical solution: a self-locking electric door lock for commercial vehicles, comprising a locking assembly and an electric control assembly, characterized in that: the locking assembly comprises a door locking mechanism for achieving a locking effect between a door and a vehicle body and an unlocking mechanism for completing an unlocking process, and the door locking mechanism and the unlocking mechanism are transmission-connected;

[0030] The electric control component includes a locking mechanism for realizing automatic locking, a control mechanism for completing unlocking mode switching, and a corresponding control circuit. The locking mechanism is transmission-connected to the door lock mechanism, and the control mechanism is electrically connected to the locking mechanism through the control circuit.

[0031] In the present invention, a free locking effect between the vehicle door and the vehicle body is achieved through the cooperation of the door lock mechanism and the unlocking mechanism. At the same time, after the vehicle door is locked, the locking mechanism automatically works to cut off the transmission effect between the unlocking mechanism and the door lock mechanism, thereby preventing the vehicle door from opening abnormally due to misoperation by the passenger. At this time, the driver can control the locking mechanism to reset, and then the passenger pulls the door lock mechanism to unlock the vehicle door.

[0032] Furthermore, by providing a control mechanism and a corresponding control circuit, mode switching of various door unlocking effects can be achieved, thereby meeting the unlocking requirements in different scenarios to improve the applicability of the door lock device. Example

[0033] See also Figure 3 and Figure 4 This embodiment further illustrates the following on the basis of the first embodiment:

[0034] The door lock mechanism includes two handles 1 respectively located on the inside and outside of the vehicle door, an electric control shaft 11 is arranged on the opposite surfaces of the handles 1, a disc spring 12 is fixedly connected to the outer contour of the electric control shaft 11, a ratchet 13 is clamped on the outer contour of the disc spring 12, a tension spring 14 is fixedly connected to the ratchet groove of the ratchet 13, the other end of the tension spring 14 is fixedly connected to a bearing roller 15 and the bearing roller 15 is also located in the ratchet groove of the ratchet 13, a bearing sleeve 16 is unidirectionally connected to the outer contour of the ratchet 13, a bevel gear 17 is fixedly connected to the opposite surfaces of the bearing sleeve 16, the bevel gear 17 is coaxially penetrated and rotatably connected to a positioning shaft 18, and the positioning shaft 18 is fixedly arranged inside the vehicle door.

[0035] The unlocking mechanism includes a positioning shaft 2 that passes through horizontally and is rotatably connected to the positioning shaft 18, one end of the positioning shaft 2 is fixedly connected to a connecting rod 22 that extends downward, and the other end of the connecting rod 22 is fixedly connected to an inclined locking lever 1 23, a bevel gear 24 passes through and is rotatably connected to the outer contour of the positioning shaft 2, and the bevel gear 24 is meshed with and transmission-connected to the two bevel gears 17, one end of the bevel gear 24 close to the connecting rod 22 is fixedly connected to a transmission ring 25 sleeved on the outer contour of the positioning shaft 2, a lock tongue 26 is fixedly connected to the bottom end of the transmission ring 25, and an inclined locking lever 27 is fixedly connected to the outer contour of the transmission ring 25, a bolt 28 is clamped on the outer contour of the lock tongue 26, and the bolt 28 is fixedly set on the vehicle body, and the inclination angles of the locking lever 1 23 and the locking lever 27 are both set to forty-five degrees.

[0036] When the door is closed and locked, the person can complete the unlocking process by pulling the handle 1 on the corresponding side. At this time, the handle 1 drives the electric control shaft 11 to rotate synchronously. The electric control shaft 11 further pulls the coil spring 12, causing the coil spring 12 to expand inside the ratchet 13. The expansion of the coil spring 12 increases the degree of engagement between it and the ratchet 13, thereby driving the ratchet 13 to rotate synchronously. The rotation of the ratchet 13 further presses against the bearing roller 15 so that the bearing roller 15 contacts the inner contour of the bearing sleeve 16. At this time, under the engaging action of the bearing roller 15, a transmission connection is achieved between the ratchet 13 and the bearing sleeve 16, that is, pulling the handle 1 can achieve the synchronous rotation of the bearing sleeve 16 at the corresponding position.

[0037] Furthermore, the bearing sleeve 16 drives the bevel gear 17 to rotate, and the bevel gear 17 causes the bevel gear 2 24 and the transmission ring 25 to deflect synchronously. Along with the deflection of the transmission ring 25, the engaging state between the lock tongue 26 and the door bolt 28 is released. At this time, the lock tongue 26 can move freely with the vehicle door, thereby realizing the unlocking process between the vehicle door and the vehicle body.

[0038] It should be noted that after the person pulls the handle 1 to unlock it, the electric control shaft 11 and the handle 1 are quickly reset under the torsional rebound of the coil spring 12. At this time, the degree of engagement between the coil spring 12 and the ratchet 13 decreases, which in turn causes the ratchet 13 to stop squeezing the bearing roller 15, so that the contact between the bearing roller 15 and the bearing sleeve 16 is disengaged, that is, at this time, the movement state of the bearing sleeve 16 cannot be transmitted to the ratchet 13 through the bearing roller 15, thereby achieving a one-way transmission effect from the ratchet 13 to the bearing sleeve 16; at the same time, the position of the bearing roller 15 inside the ratchet 13 is further limited by the setting of the tension spring 14, thereby avoiding the decrease in the engagement effect between the bearing roller 15 and the bearing sleeve 16 due to excessive sliding of the bearing roller 15.

[0039] Furthermore, when the vehicle door is in the unlocked state, a person pushes and pulls the vehicle door to close it. At this time, the door bolt 28 contacts and abuts against the locking lever 27, causing the transmission ring 25 and the lock tongue 26 to deflect synchronously. When the vehicle door is completely closed, the lock tongue 26 is re-engaged in the door bolt 28 to achieve the locking effect of the vehicle door; and in this process, the deflection of the transmission ring 25 is transmitted to the bevel gear 24, and the bevel gear 24 is transmitted to the bevel gear 1 17 and the bearing sleeve 16 on the upper and lower sides. However, since there is no contact between the bearing roller 15 and the bearing sleeve 16 at this time, the deflection of the bearing sleeve 16 accompanied by the bevel gear 17 cannot be transmitted to the ratchet 13, thereby avoiding the re-locking process of the unlocking mechanism when the vehicle door is closed. Interference with the movement of the door lock mechanism.

[0040] Similarly, when a person pulls the corresponding side handle 1 to achieve the unlocking effect, the unlocking process will only occur when the ratchet 13 at the corresponding position transfers movement to the bearing sleeve 16, thereby avoiding movement interference between the two handles 1 and affecting the normal operation of the door lock mechanism. Example

[0041] See also Figure 5 This embodiment further illustrates the following based on the second embodiment:

[0042] The locking mechanism includes a door shaft 3 for connecting the vehicle door to the vehicle body, an electromagnet 31 arranged inside the vehicle door is penetrated and rotatably connected to the outer contour of the middle section of the door shaft 3, a return spring 32 is fixedly connected to the outer contour of the electromagnet 31, the other end of the return spring 32 is fixedly connected to the electromagnet 2 33, the other end of the electromagnet 2 33 is limitedly rotatably connected to a bevel gear 34, and the bevel gear 34 is penetrated and sleeved on the outer contour of the positioning shaft 2 2, the interior of the bevel gear 34 is fixedly connected to a spline pin 35, and the spline pin 35 is slidably connected to the inside of the spline groove 21.

[0043] An angle sensor is arranged inside the door shaft 3 and the sensor is configured to monitor the rotation angle of the electromagnet 31 on the door shaft 3.

[0044] It should be noted that when the vehicle door is closed and locked, there is a risk of abnormal unlocking due to human error. Therefore, a locking mechanism is provided to control the transmission effect between the door locking mechanism and the unlocking mechanism so that it automatically disengages in the locked state to avoid human error.

[0045] When the door is closed, the control circuit is turned on, and the electromagnet 1 31 and the electromagnet 2 33 are energized and generate magnetism. The electromagnet 1 31 attracts the electromagnet 2 33 to drive the bevel gear 34 to move and compress the reset spring 32. At this time, the bevel gear 34 is disengaged from the bevel gear 1 17, that is, the rotation of the bevel gear 1 17 cannot affect the bevel gear 3 34.

[0046] Furthermore, since the inclination angles of the locking lever 1 23 and the locking lever 2 27 are both set to forty-five degrees, that is, the locking lever 1 23 and the locking lever 2 27 are in a mutually perpendicular clamping and abutting state, when a person directly pulls the handle 1, the transmission ring 25 cannot be deflected due to the clamping between the locking lever 27 and the locking lever 1 23, causing the lock tongue 26 to still maintain its clamping state with the door bolt 28, thereby failing to complete the unlocking process of the vehicle door to realize the automatic locking function when the vehicle door is closed.

[0047] When the driver operates the control mechanism to disconnect the control circuit, the electromagnet 1 31 and the electromagnet 2 33 stop being energized. At this time, the reset spring 32 rebounds and drives the bevel gear 34 to re-engage with the bevel gear 17. Further, when the person pulls the handle 1 to cause the bevel gear 17 to rotate, the bevel gear 34 and the bevel gear 2 24 rotate synchronously and in opposite directions. The bevel gear 3 34 further drives the spline groove 21, the connecting rod 22 and the locking lever 1 23 to rotate synchronously with the cooperation of the spline pin 35 and the spline groove 21. At this time, the reverse rotation between the locking lever 1 23 and the locking lever 2 27 successfully releases the perpendicular clamping state therebetween. The transmission ring 25 can further realize the disengagement of the lock tongue 26 from the inside of the door bolt 28 along with the normal rotation of the bevel gear 24, thereby completing the unlocking process of the door.

[0048] Furthermore, a sensor is provided inside the door shaft 3 to detect the rotation angle of the electromagnet 1 31, and the rotation angle of the electromagnet 1 31 is the opening angle of the door. When the door is opened and reopened, the sensor sends a signal to the control circuit, and the control circuit closes again and energizes the electromagnet 1 31 and the electromagnet 2 33, so that the bevel gear 3 34 is disengaged from the bevel gear 1 17, thereby completing the transmission cutting effect of the locking mechanism on the door locking mechanism and the unlocking mechanism. Example

[0049] See also Figure 6-7 This embodiment further illustrates the following on the basis of the third embodiment:

[0050] The control mechanism includes a knob 4 arranged in the driving position of the vehicle body, the top of the knob 4 is fixedly connected to a fixing seat 41, the top of the fixing seat 41 is penetrated and slidably connected with a push switch 42, a compression spring 43 located inside the fixing seat 41 is fixedly connected between the bottom end of the push switch 42 and the top of the knob 4, the bottom end of the knob 4 is rotatably connected to a scale ring 44 and the scale ring 44 is fixedly connected to the inside of the vehicle body, four limiting grooves 45 are equidistantly arranged in an annular shape on the inner contour of the scale ring 44, a positioning pin 46 is slidably connected inside the limiting groove 45, and a compression spring 47 located inside the limiting groove 45 is fixedly connected between the positioning pin 46 and the inner contour of the scale ring 44.

[0051] The control mechanism also includes a limit plate 5 arranged inside the knob 4, a connecting shaft 51 is clamped at the axis center of the top end of the limit plate 5 and the connecting shaft 51 is fixedly connected to the inner contour of the knob 4, a fixing ring 52 is fixedly connected to the outer contour of the connecting shaft 51, a positioning lever 53 is fixedly connected to the outer contour of the fixing ring 52, a fixing pin 1 54 is fixedly connected to the top end of the limit plate 5, a fixing pin 2 55 is fixedly connected to the upper surface of the positioning lever 53 away from the fixing ring 52, a connecting spring 56 is fixedly connected between the fixing pin 1 54 and the fixing pin 2 55, a T-shaped electric contact plate 57 is fixedly connected to the bottom end of the limit plate 5, a positioning groove 58 is opened on the outer contour of the limit plate 5, and the positioning groove 58 has the same specifications as the positioning pin 46.

[0052] It can be seen from the first and third embodiments that the control mechanism is arranged at the driving position in the vehicle body and is controlled by the driver. The door is automatically locked when closed. At this time, the handle 1 cannot realize the control process of the unlocking mechanism, and after the driver presses the push switch 42, the locking mechanism drives the door locking mechanism and the unlocking structure to re-transmit. At this time, the handle 1 can complete the door unlocking, that is, people can get on and off the vehicle only after obtaining the driver's permission, thereby effectively ensuring the safety protection performance of the vehicle.

[0053] On the other hand, the driver can freely switch between multiple unlocking modes by operating the control button. When the driver turns the knob 4, the knob 4 drives the connecting shaft 51, the fixing ring 52 and the positioning lever 53 to rotate synchronously. At this time, the limit plate 5 and the fixing pin 54 cannot rotate in the clamping state between the positioning groove 58 and the positioning pin 46, that is, as the knob 4 rotates, the stretching degree of the connecting spring 56 increases synchronously.

[0054] When the knob 4 is rotated ninety degrees, the positioning lever 53 rotates synchronously and contacts the positioning pin 46. At this time, the positioning lever 53 squeezes the positioning pin 46 and causes the positioning pin 46 to slide in the limiting groove 45 and compress the compression spring 2 47 synchronously. As the positioning pin 46 slides, the clamping state between it and the positioning groove 58 is gradually released. When the positioning pin 46 is out of contact with the positioning groove 58, the positioning groove 58 stops limiting the limiting plate 5 and the fixing pin 1 54. The limiting plate 5 and the fixing pin 1 54 are rapidly rotated ninety degrees under the rebound action of the connecting spring 56 and cause the positioning groove 58 to re-engage with the positioning pin 46 at another position. That is, as the knob 4 is rotated, the rotation of the limiting plate 5 is limited to four gears of a single ninety degree. At the same time, the T-shaped electric contact plate 57 rotates synchronously with the limiting plate 5 to realize the switching of the control circuit connection state, thereby completing the adjustment process of the door unlocking mode. Example

[0055] See also Figure 8-9 This embodiment further illustrates the following on the basis of the fourth embodiment:

[0056] The control circuit includes a series circuit that realizes electrical connection between the door shaft 3, the electromagnet 31, the return spring 32 and the push switch 42, and a parallel circuit that realizes electrical connection between the T-shaped electric contact plate 57 and the two electric control shafts 11.

[0057] It can be seen from the third and fourth embodiments that the driver can disconnect the series circuit by pressing the push switch 42. At this time, the electromagnet 1 31 and the electromagnet 2 33 stop being energized and lose their magnetism, and the locking mechanism drives the door locking mechanism and the unlocking mechanism to re-transmit to unlock the door; and when the door is opened and closed again, the internal sensor of the door shaft 3 sends a signal to the series circuit. At this time, the series circuit is reopened, and the locking mechanism disconnects the transmission between the door locking mechanism and the unlocking mechanism, thereby completing the automatic locking function of the door.

[0058] On the other hand, when the driver turns the knob 4 to complete the door unlocking mode switching, the T-shaped electric contact plate 57 switches synchronously between four gears, wherein the initial gear is as follows: Fig. 9As shown, at this time, the circuit is turned on and A and B are in parallel state. A and B represent the electric control shaft 11 connected to the inner and outer handles 1 respectively. When the circuit is turned on, the electric control shaft 11 generates magnetism and realizes the transmission connection between it and the handle 1, that is, in the initial gear, both handles 1 can realize the control of the electric control shaft 11. At this time, the inner and outer handles 1 can normally unlock and open the door. This situation is suitable for normal use of the vehicle, which is convenient for people inside and outside the vehicle to enter and exit freely. It is suitable for daily use and rapid evacuation in emergency situations.

[0059] When the T-shaped electric contact plate 57 rotates 90 degrees and reaches the second gear position, A is turned on and B is turned off, that is, the inner handle 1 is opened normally, and the outer handle 1 cannot control the door. This situation is suitable for preventing outsiders from entering the vehicle without permission and increasing the anti-theft performance of the vehicle; it is suitable for situations where the safety of items in the vehicle needs to be ensured during short-term parking.

[0060] When the T-shaped electric contact plate 57 rotates 90 degrees again to the third gear, A and B are disconnected, that is, the inside and outside handles 1 cannot control the door. This situation is suitable for situations where the vehicle needs to be completely locked, such as long-term parking or when the vehicle is unattended, to ensure the absolute safety of the vehicle.

[0061] When the T-shaped electric contact plate 57 rotates 90 degrees again and reaches the gear position 4, A is disconnected and B is connected, the outer handle 1 is opened normally, and the inner handle 1 cannot control the door. This situation is suitable for preventing people in the car from accidentally opening the door during driving, thereby increasing driving safety. It is particularly suitable for vehicles with children to prevent children from operating the door by mistake.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking electric door lock for commercial vehicles, comprising a locking assembly and an electric control assembly, characterized in that: The locking assembly includes a door locking mechanism for achieving a locking effect between the vehicle door and the vehicle body and an unlocking mechanism for completing an unlocking process, and the door locking mechanism and the unlocking mechanism are in transmission connection with each other; The electric control assembly includes a locking mechanism for realizing automatic locking, a control mechanism for completing unlocking mode switching, and a corresponding control circuit. The locking mechanism is transmission-connected to the door lock mechanism, and the control mechanism is electrically connected to the locking mechanism through the control circuit. The door lock mechanism includes two handles respectively located on the inside and outside of the vehicle door, an electric control shaft is arranged on the opposite surfaces of the handles, a disc spring is fixedly connected to the outer contour of the electric control shaft, a ratchet is clamped on the outer contour of the disc spring, a tension spring is fixedly connected to the ratchet groove of the ratchet, the other end of the tension spring is fixedly connected to a bearing roller and the bearing roller is also located in the ratchet groove of the ratchet, a bearing sleeve is unidirectionally connected to the outer contour of the ratchet, a bevel gear 1 is fixedly connected to the opposite surfaces of the bearing sleeve, the bevel gear 1 is coaxially penetrated and rotatably connected to a positioning shaft 1, and the positioning shaft 1 is fixedly arranged inside the vehicle door.

2. A self-locking electric door lock for commercial vehicles according to claim 1, characterized in that: The unlocking mechanism includes a positioning shaft 2 that penetrates horizontally and is rotatably connected to the positioning shaft 1, one end of the positioning shaft 2 is fixedly connected to a connecting rod extending downward, the other end of the connecting rod is fixedly connected to an inclined locking lever 1, a bevel gear 2 penetrates and is rotatably connected to the outer contour of the positioning shaft 2, and the bevel gear 2 is meshed with and transmission-connected to the two bevel gears 1, the bevel gear 2 is fixedly connected to an end of the bevel gear 2 close to the connecting rod with a transmission ring sleeved on the outer contour of the positioning shaft 2, the bottom end of the transmission ring is fixedly connected to a lock tongue, the outer contour of the transmission ring is fixedly connected to an inclined locking lever 2, a door bolt is clamped on the outer contour of the lock tongue, and the door bolt is fixedly arranged on the vehicle body. The inclination angles of the locking lever 1 and the locking lever 2 are both set to forty-five degrees; the control mechanism includes a knob arranged in the driving position of the vehicle body, the top of the knob is fixedly connected to a fixing seat, the top of the fixing seat is penetrated by and slidably connected with a push switch, a compression spring 1 located inside the fixing seat is fixedly connected between the bottom end of the push switch and the top end of the knob, the bottom end of the knob is rotatably connected to a scale ring and the scale ring is fixedly connected to the inside of the vehicle body, four limit grooves are equidistantly arranged in an annular shape on the inner contour of the scale ring, a positioning pin is slidably connected inside the limit groove, and a compression spring 2 located inside the limit groove is fixedly connected between the positioning pin and the inner contour of the scale ring.

3. A self-locking electric door lock for commercial vehicles according to claim 1, characterized in that: The locking mechanism includes a door shaft for connecting the vehicle door to the vehicle body, an electromagnet 1 arranged inside the vehicle door is penetrated and rotatably connected to the outer contour of the middle section of the door shaft, a return spring is fixedly connected to the outer contour of the electromagnet 1, the other end of the return spring is fixedly connected to the electromagnet 2, the other end of the electromagnet 2 is limitedly rotatably connected to the bevel gear 3, and the bevel gear 3 is penetrated and sleeved on the outer contour of the positioning shaft 2, and a spline pin is fixedly connected to the inside of the bevel gear 3 and the spline pin is slidably connected to the inside of the spline groove.

4. A self-locking electric door lock for commercial vehicles according to claim 3, characterized in that: An angle sensor is arranged inside the door shaft and the sensor is configured to monitor the rotation angle of the electromagnet on the door shaft.

5. A self-locking electric door lock for commercial vehicles according to claim 2, characterized in that: The control mechanism also includes a limit plate arranged inside the knob, a connecting shaft is clamped at the axis center of the top end of the limit plate and the connecting shaft is fixedly connected to the inner contour of the knob, a fixing ring is fixedly connected to the outer contour of the connecting shaft, a positioning lever is fixedly connected to the outer contour of the fixing ring, a fixing pin 1 is fixedly connected to the top end of the limit plate, a fixing pin 2 is fixedly connected to the upper surface of the positioning lever away from one end of the fixing ring, a connecting spring is fixedly connected between the fixing pin 1 and the fixing pin 2, and a T-shaped electric contact plate is fixedly connected to the bottom end of the limit plate.

6. A self-locking electric door lock for commercial vehicles according to claim 5, characterized in that: A positioning groove is provided on the outer contour of the limiting plate, and the specifications of the positioning groove and the positioning pin are consistent.

7. A self-locking electric door lock for commercial vehicles according to claim 6, characterized in that: The control circuit includes a series circuit for electrically connecting the door shaft, electromagnet 1, reset spring and push switch, and a parallel circuit for electrically connecting the T-shaped electric contact plate and two electric control shafts.

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