Special vehicle door lock with double-ratchet holding and locking mechanism

Abstract

The invention discloses a special vehicle door lock with a double-ratchet clasping and locking mechanism. The special vehicle door lock comprises a lock cylinder part, a bottom plate, a ratchet part, a self-locking mechanism, a back locking and locking mechanism and an unlocking mechanism. The ratchet component comprises double ratchets, a front guide plate and a ratchet fixing plate, the locking column can be held through an arc-shaped surface formed by the double ratchets, a formed ratchet position is matched with a ratchet stop block and a retaining hook of the lock mechanism, and the double ratchets are locked under the action of elastic force. And a back locking plate shifting block of the back locking mechanism is used for driving a retaining hook back locking stop block and a back locking plate, the retaining hook and a ratchet stop block are locked at the same time, and the vehicle door is further pressed through a lock cylinder lifting mechanism. And unlocking is realized through an unlocking hook of the unlocking mechanism. The actions of the vehicle door lock part are not in the same plane or direction, the self-locking mechanism and the back locking mechanism are provided with a plurality of dead points, the multiple accidental unlocking prevention function is achieved, and the vehicle door lock device is especially suitable for the working conditions of large loads, severe impact, severe complex vibration and the like of crawler-type special vehicles.

Description

Technical Field

[0001] The invention relates to a lock, in particular to a new type of double ratchet clamping and locking mechanism special vehicle door lock, which is particularly suitable for working conditions such as heavy load, severe impact, severe and complex vibration of tracked special vehicles. Background Art

[0002] The statements in this section only provide background information related to the present disclosure, and these statements may constitute prior art. In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art.

[0003] Special vehicles, especially tracked special vehicles, have operating conditions with heavy loads, severe impacts, severe and complex vibrations, etc., and it is necessary to solve the problem of door lock failure caused by severe and complex vibrations. In addition, because some welded vehicle bodies have large differences in doors, the doors are not tightly sealed when locked, and further compression is required after locking to achieve effective sealing of the doors.

[0004] Currently, the door locking structure mainly adopts a single ratchet or double ratchet clamping structure.

[0005] The single ratchet clamping structure, such as the patent application number 202080049708.X, whose name is "a closed latch assembly with a power tie mechanism with an anti-knocking function", or the patent application number 201910238000.8, whose name is "a closed latch assembly with a latch mechanism in a double-pawl configuration", has a small opening angle of a single tooth under the same size as the double ratchet clamping vehicle door lock, and can only be locked with a relatively thin lock column. The strength of the single tooth and the lock column is relatively low, and it is difficult to cope with the working conditions of large loads and severe impacts of special vehicles. In addition, the assembly accuracy requirements of the door lock are high, and the internal structure is complex. In addition, the ratchet, ratchet gear limit mechanism, actuator, etc. all rotate in one plane or on parallel planes, which makes the thickness of the door lock also large.

[0006] The existing double ratchet clamping structure uses two symmetrical ratchet clamping lock columns, which can be locked with a thicker lock column. The double teeth and lock column are relatively strong and are mostly suitable for vehicles such as trucks and large mechanical vehicles that are subject to heavy loads, severe impacts, and severe and complex vibrations. The applicant once applied for "a special vehicle door lock using a ratchet clamping and locking mechanism" (application number 201510981572.7) with the double ratchet clamping structure as the core. However, it was found in practice that this type of double ratchet clamping structure still has some defects when used on special vehicles. First of all, the ratchet stop block of the existing double ratchet clamping vehicle door lock, like the single ratchet clamping mechanism, is mostly a rotational motion, and the rotation plane and the ratchet rotation plane are in the same plane. This makes the double ratchet and ratchet stop block have a larger range of motion, resulting in a thicker door lock. Since the door lock is installed on the car door, the thickness of the car door must also be thick; secondly, the ratchet stop block of the rotating motion is small in size and wears quickly, and it is easy to disengage the ratchet under severe and complex vibration conditions, eventually causing the double ratchet to open and the door lock to fail. Finally, some of the above-mentioned special vehicles are vehicles with welded bodies and doors that are quite different, and the above-mentioned patent cannot achieve effective sealing of the doors of such vehicles.

[0007] The original intention of the applicant in designing the present invention is to design a ratchet clamping structure that enables the door lock to resist severe and complex vibrations without failure, with better performance and longer service life, while maintaining a small thickness, and to achieve effective sealing of the door. Summary of the invention

[0008] In view of the above problems, the object of the present invention is to solve part of the problems in the prior art, or at least alleviate these problems.

[0009] A special vehicle door lock with a double ratchet holding and locking mechanism, comprising:

[0010] A lock cylinder component, comprising a lock cylinder body;

[0011] Base plate;

[0012] The ratchet component is arranged on the bottom plate, including a pair of symmetrically arranged ratchet teeth, a front guide plate and a ratchet fixing plate; the inner sides of the ratchet teeth are provided with a clamping surface and a ratchet position, and when the two ratchet teeth are closed inwardly, the two clamping surfaces form a ratchet clamping mouth for clamping the lock cylinder body, and the two ratchet positions form a ratchet position opening; the front guide plate is arranged on one side of the ratchet teeth, and a front guide plate opening for passing through is provided at the corresponding position where the lock cylinder body hits; the ratchet fixing plate is arranged on the other side of the ratchet teeth, and two ratchet rotating shafts are symmetrically arranged on it; the ratchet rotating shafts pass through the two ratchet teeth respectively and are connected to the front guide plate; the ratchet fixing plate is provided with a ratchet fixing plate opening adapted to the ratchet position opening; a pair of ratchet reset springs are symmetrically arranged between the ratchet teeth and the ratchet fixing plate, and are respectively sleeved on the two ratchet rotating shafts, for applying an elastic force to the ratchet teeth to open outward;

[0013] The self-locking mechanism comprises a ratchet stop block; the first end of the ratchet stop block is located at the opening of the ratchet fixing plate, and is in contact with the end faces of the two ratchets when the ratchets are opened outward; the ratchet stop block is provided with a first linear motion guide groove, in which a ratchet stop block guide bolt shaft and a ratchet stop block spring are provided; the ratchet stop block guide bolt shaft passes through the first linear motion guide groove and is fixedly connected to the bottom plate, and is used to maintain the elastic force of the ratchet stop block moving in the ratchet direction through the ratchet stop block spring;

[0014] The unlocking mechanism is provided on the base plate, and comprises a coaxially arranged handle, an unlocking hook and a handle sleeve; the unlocking hook can rotate with the rotation of the handle, and can drive the ratchet stop block to move in the opposite direction of the ratchet position opening; the handle sleeve is connected to the base plate.

[0015] Preferably, the self-locking mechanism also includes a back-off hook and a ratchet stop block cover; the ratchet stop block is provided with a second linear motion guide groove, and the ratchet stop block cover is fixedly connected to the base plate through a ratchet stop block guide bolt shaft passing through the second linear motion guide groove; the second end of the ratchet stop block is provided with a ratchet stop block pin; the first end of the back-off hook is rotatably connected to the ratchet stop block cover; when the first end of the ratchet stop block moves into the ratchet position opening, the second end of the back-off hook rotates and hooks the ratchet stop block pin Pin; the ratchet stop block cover is provided with a back-off hook spring, which is in contact with or connected to the second end of the back-off hook, so that the back-off hook can hook the ratchet stop block pin under the action of its spring; when the unlocking hook rotates, the back-off hook can be pushed away from the ratchet stop block pin, and the ratchet stop block is driven to move in the opposite direction of the ratchet position opening through the ratchet stop block pin; the first linear motion guide groove is a pair of guide grooves symmetrically arranged on both sides of the back-off hook, and a ratchet stop block guide bolt shaft and a ratchet stop block spring are arranged in each of them.

[0016] The special vehicle door lock with double ratchet clamping and locking mechanism also includes an anti-locking and locking mechanism; optionally, the anti-locking and locking mechanism includes an anti-locking plate, an anti-locking plate shifting block, and an anti-locking device for rotating the anti-locking plate shifting block; the anti-locking plate is provided with at least two strip grooves, and slides within the range of the strip grooves through an axial screw fixed to the bottom plate; the first end of the anti-locking plate is provided with an upper limit gear and a lower limit gear, and the second end is provided with a step; the anti-locking plate shifting block is movably arranged on the bottom plate through a rotating shaft; the anti-locking plate shifting block is provided with a guide block, located between the upper limit gear and the lower limit gear of the anti-locking plate, and can drive the anti-locking plate to move up and down by rotation; the anti-locking plate shifting block is provided with a back-off hook anti-locking block that can rotate with it; when the anti-locking plate shifting block drives the anti-locking plate to move downward to the limit position, the back-off hook anti-locking block limits the back-off hook from disengaging from the ratchet stop block shifting pin, and at the same time, the step at the second end of the anti-locking plate limits the ratchet stop block from disengaging from the ratchet position opening.

[0017] Furthermore, the anti-locking device includes an anti-locking knob and / or a push-pull rod for automatic locking; the anti-locking knob is fixedly connected to the anti-locking plate block; the push-pull rod for automatic locking is used to connect to the vehicle-mounted central control locking motor.

[0018] Furthermore, the anti-locking plate shift block is provided with an anti-locking plate shift block spring; one end of the anti-locking plate shift block spring is connected to the bottom plate, and the other end is connected to the guide block of the anti-locking plate shift block to prevent the anti-locking plate shift block from rotating freely.

[0019] The lock cylinder body part also includes a lock cylinder body lifting mechanism; the lock cylinder body lifting mechanism can drive the lock cylinder body to rise or fall.

[0020] Optionally, the lock cylinder lifting mechanism includes a lock cylinder seat, a double-headed screw, and a first T-shaped block and a second T-shaped block arranged symmetrically; a lock cylinder seat U-shaped opening is provided in the middle of the lock cylinder seat for the lock cylinder body to move up and down; lock cylinder seat T-shaped slots that are compatible with the first T-shaped block and the second T-shaped block are provided on both sides of the lock cylinder seat; the double-headed screw is provided with opposite threads at the places where it passes through the first T-shaped block and the second T-shaped block, which are compatible with the threaded holes of the first T-shaped block and the second T-shaped block; the upper ends of the first T-shaped block and the second T-shaped block are symmetrically connected to the lock cylinder body through a plurality of connecting rods and a rotating shaft.

[0021] Furthermore, the clamping surface of the ratchet is an arc-shaped surface, and a circular hole is formed when the ratchet is closed inward; the shapes of the ratchet position opening and the ratchet fixing plate opening are adapted to the shape of the first end of the ratchet stop block; the front guide plate opening is a trumpet-shaped opening for aligning the center position when colliding with the lock cylinder body, and a short straight line plus a semicircular opening are used to transfer the load to the lock cylinder body.

[0022] Furthermore, at least one pair of ratchet fixing plate feet are symmetrically provided on both sides of the ratchet fixing plate; the ratchet fixing plate feet are used to limit the outward opening degree of the ratchet; at least one pair of support shafts fixed to the front guide plate are symmetrically provided on both sides of the ratchet fixing plate; the front guide plate is fixed to the base plate through symmetrically arranged support blocks; the handle sleeve, the unlocking hook and the handle are rotatably connected through a rotating shaft, and the rotating shaft sleeve is provided with a handle reset spring for resetting the unlocking hook and the handle to their initial positions.

[0023] Furthermore, the anti-retraction hook is rotatably connected to the ratchet stop block cover via the anti-retraction hook rotating shaft; the anti-retraction hook spring is sleeved on the anti-retraction hook rotating shaft and is in contact with or connected to the second end of the anti-retraction hook.

[0024] The present invention has the following beneficial effects:

[0025] 1. The ratchet stop block of the present invention adopts a linear motion mode and cooperates with double ratchets, and is not in the same motion plane or direction, and cooperates with a self-locking mechanism and a double anti-locking lock mechanism. Under the same load and impact conditions as the existing double ratchets, the door lock has a smaller thickness, better resistance to severe and complex vibrations, and a longer service life of the components; and cooperates with a lock cylinder lifting mechanism. After the door lock is locked, the relative position of the lock cylinder and the lock body is lifted, and the door can be further reliably sealed, which is particularly suitable for rapid adjustment and compression of the locking position when there are large differences between the welded body and the door;

[0026] 2. When locked, the present invention has multiple dead points in the self-locking mechanism and the anti-locking mechanism, has multiple functions of preventing accidental unlocking, and is equipped with an anti-locking plate block spring to prevent the anti-locking plate from shifting. It is particularly suitable for working conditions such as large loads, severe impacts, and severe and complex vibrations of tracked special vehicles, so that the anti-vibration ability of the present invention is greatly improved, avoiding the problem of double ratchet teeth opening and door lock failure;

[0027] 3. The present invention improves the front guide plate, etc., so that it can correct the center position when colliding with the lock column, and transfer the weight, impact and other loads of the door perpendicular to the ground to the lock column, protecting the ratchet from being affected by the load in this direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. 1 is a diagram of an initial state in which the double ratchets of the locking mechanism of the present invention are opened;

[0029] Figure 2 It is a schematic diagram of the double ratchets of the locking mechanism of the present invention when they are closed and tightly hold the locking column;

[0030] Figure 3 It is a schematic diagram of the ratchet stop block of the self-locking mechanism of the present invention in the retracted position;

[0031] Figure 4 A schematic diagram of the pop-up position of the ratchet stop block of the self-locking mechanism of the present invention;

[0032] Figure 5 A schematic diagram of the initial position of the double ratchet when it is in the open state;

[0033] Figure 6 It is a schematic diagram of the double ratchet in the closed state;

[0034] Figure 7 It is a schematic diagram of the structure of the ratchet stop block and the pull pin;

[0035] Figure 8 is a connection diagram of the front side of the ratchet component;

[0036] Fig. 9 is a connection diagram of the back side of the ratchet component;

[0037] Fig.10 is a top view of the ratchet component;

[0038] Fig.11 is a schematic diagram of the bottom plate component;

[0039] Fig.12 A top view of the bottom plate component;

[0040] Fig.13 It is a front view schematic diagram of the reverse locking mechanism of the present invention when it is arranged on the bottom plate;

[0041] Fig.14 It is a back schematic diagram of the reverse locking mechanism of the present invention when it is arranged on the bottom plate;

[0042] Fig.15 This is a schematic diagram of the unlocking hook top starting and stopping hook retraction during the unlocking operation;

[0043] Fig.16 It is a schematic diagram of the unlocking hook continuing to lift the stop hook and contacting the ratchet stop block pin during the unlocking operation;

[0044] Fig.17 This is a schematic diagram of the unlocking hook driving the ratchet stop block to move to the right during the unlocking operation;

[0045] Fig.18 It is a side view schematic diagram of the initial position of the anti-locking locking mechanism;

[0046] Fig.19 It is a schematic diagram of the anti-locking plate shifting block of the anti-locking and locking mechanism pushing the anti-locking plate to move downward;

[0047] Fig. 20 It is a schematic diagram of the anti-locking locking mechanism when it completes locking;

[0048] Fig.21A schematic diagram of the other side of the anti-locking locking mechanism when the locking is completed;

[0049] Fig. 22 It is a schematic diagram of the left and right sides of the lock cylinder component;

[0050] Fig.23 It is a schematic diagram of the double-ended screw of the lock cylinder lifting mechanism when it rotates;

[0051] Fig.24 It is the initial state when the door lock is opened;

[0052] Fig.25 It is a schematic diagram of a door lock in a locked state;

[0053] Fig.26 This is a schematic diagram of the door lock further pressing the door;

[0054] Fig. 27 It is a schematic diagram of reverse locking or automatic locking;

[0055] Fig.28 It is a schematic diagram of releasing the anti-lock or automatic locking;

[0056] Fig.29 This is a schematic diagram of turning the handle to unlock;

[0057] Fig.30 It is a schematic diagram of the ratchet stop block disengaging from the double ratchet position when unlocking;

[0058] Fig.31 This is a schematic diagram of the door lock being opened.

[0059] Among them: 1-lock cylinder; 2-ratchet; 3-ratchet stop block; 4-support shaft; 5-ratchet shaft; 6-front guide plate; 7-ratchet stop block pin; 8-ratchet position; 9-holding surface; 10-bottom plate; 11-ratchet stop block spring; 12-retraction hook; 13-retraction hook spring; 14-retraction hook shaft; 15-ratchet stop block cover; 16-ratchet stop block guide bolt shaft; 17-first linear motion guide groove; 18-second linear motion guide groove; 19-ratchet fixing plate ; 20-support block; 21-ratchet fixing plate foot; 22-ratchet return spring; 23-handle sleeve; 24-handle; 25-unlocking hook; 26-handle return spring; 27-retraction hook anti-lock block; 28-anti-lock plate shift block spring; 29-axial screw; 30-anti-lock plate shift block; 31-anti-lock knob; 32-push-pull rod for automatic locking; 33-anti-lock plate; 34-lock column seat; 35-first T-shaped block; 36-second T-shaped block; 37-double-headed screw; 38-connecting rod. DETAILED DESCRIPTION

[0060] The present invention is further described below in conjunction with the accompanying drawings. The embodiments of the present invention are only used to illustrate the present invention rather than to limit the present invention. Without departing from the technical idea of ​​the present invention, various substitutions and changes can be made according to common technical knowledge and customary means in the field, which should all be included in the scope of the present invention.

[0061] In order to solve the defects of the existing single ratchet and double ratchet clamping structures and meet the needs of special vehicles for door locks, the applicant has designed the following solution.

[0062] like Figures 1 to 24 As shown, a special vehicle door lock with a double ratchet holding and locking mechanism comprises:

[0063] The lock cylinder component comprises a lock cylinder body 1;

[0064] Bottom plate 10;

[0065] Ratchet parts, such as Figure 8 As shown, it is arranged on the bottom plate 10, including a pair of symmetrically arranged ratchet teeth 2, a front guide plate 6 and a ratchet fixing plate 19; Figure 5 As shown, the inner sides of the ratchet teeth 2 are provided with a gripping surface 9 and a ratchet position 8. When the two ratchet teeth 2 are closed inwardly, the two gripping surfaces form a ratchet gripping opening for gripping the lock cylinder body 1, and the two ratchet positions 8 form a ratchet position opening. Figure 6 As shown, the ratchet stop block 3 can pass through; the front guide plate 6 is provided on one side of the ratchet 2, and a front guide plate opening is provided at the corresponding position where the lock cylinder body 1 hits, so that the front guide plate opening can pass through. Fig. 9 As shown, the lock cylinder body 1 is prevented from being affected by the front guide plate 6 when it hits the ratchet; the ratchet fixing plate 19 is arranged on the other side of the ratchet 2, and two ratchet shafts 5 are symmetrically arranged thereon, as shown in FIG. Figure 1 Or 2; the ratchet shaft 5 passes through the two ratchets 2 respectively and is connected to the front guide plate 6. The ratchet 2 can rotate on the ratchet shaft 5. The ratchet shaft 5 can be fixed to the corresponding hole of the ratchet fixing plate 19 by riveting or welding. The ratchet fixing plate 19 is provided with a ratchet fixing plate opening that matches the ratchet position opening, so that the ratchet stop block 3 can pass through. A pair of ratchet reset springs 22 are symmetrically provided between the ratchet 2 and the ratchet fixing plate 19, which are respectively sleeved on the two ratchet shafts 5, and are used to apply an outward opening elastic force to the ratchet 2 to reset and open the two closed ratchets 2.

[0066] The self-locking mechanism comprises a ratchet stop block 3; the first end of the ratchet stop block 3 is located at the opening of the ratchet fixing plate, and is in contact with the end surfaces of the two ratchet teeth 2 when the ratchet teeth 2 are opened outwards, such as Figure 1 The ratchet stop block 3 is provided with a first linear motion guide groove 17, as Figure 7As shown, the first linear motion guide groove 17 is provided with a ratchet stopper guide bolt shaft 16 and a ratchet stopper spring 11. Figure 3 Or as shown in 4; the ratchet stop block guide bolt shaft 16 passes through the first linear motion guide groove 17 and is fixedly connected to the base plate 10, such as Fig.14 As shown, the ratchet stop block spring 11 is used to keep the ratchet stop block 3 moving toward the ratchet 2 with elastic force.

[0067] Unlocking mechanism, such as Fig.11 As shown, the base plate 10 is provided with a coaxially arranged handle 24, an unlocking hook 25 and a handle sleeve 23; the unlocking hook 25 can rotate with the rotation of the handle 24, and can drive the ratchet stop block 3 to move in the opposite direction of the ratchet position opening; the handle sleeve 23 is connected to the base plate 10.

[0068] like Figure 3 As shown in FIG. 4 , the ratchet stop block 3 can move forward and backward on the base plate 10. The ratchet stop block guide bolt shaft 16 is arranged at the rear end of the first linear motion guide groove 17. One end of the ratchet stop block spring 11 presses against the first linear motion guide groove 17, and the other end presses against the ratchet stop block guide bolt shaft 16. Since the ratchet stop block guide bolt shaft 16 penetrates the corresponding hole of the base plate 10 and is fixed by a nut, etc., as shown in FIG. Fig.14 As shown, when the ratchet stop block 3 is moved backward by the unlocking hook 25, the ratchet stop block spring 11 keeps applying a forward spring force to the ratchet stop block 3, so that the ratchet stop block 3 can automatically reset forward into the ratchet position opening when the ratchet stop block 3 is not subjected to the force of the unlocking hook 25, so as to limit the rotation of the double ratchet.

[0069] The lock cylinder component in the above solution is installed on the door frame, and the bottom plate 10 is installed on the door. Fig.24 As shown, the ratchet component, the self-locking mechanism, and the unlocking mechanism are all arranged on the bottom plate 10. The ratchet stop block 3 of the present invention and the double ratchets are not in the same motion plane. It realizes the locking and unlocking of the double ratchet rotation by cooperating with the unlocking hook 25 and the first linear motion guide groove 17. Under the same load and impact conditions as the existing double ratchets, the door lock of the present application has a smaller thickness. In addition, the ratchet stop block 3 using the above scheme adopts a linear motion mode, and has a larger volume and less wear. It is less likely to detach from the ratchet 2 under severe and complex vibration conditions, thereby avoiding the problem of the double ratchets opening and the door lock failing.

[0070] The unlocking hook 25 can drive the ratchet stop block 3 to move backward to leave the ratchet position opening in various ways to remove the rotation locking of the double ratchets. As, the ratchet stop block 3 sides are provided with grooves, which are hooked when the unlocking hook 25 rotates to drive it to move backward.

[0071] You can also Fig.11As shown, the unlocking hook 25 drives the ratchet stop block 3 to move backward through the ratchet stop block push pin 7 provided on the ratchet stop block 3. Fig.11 As shown in FIG. 12 , the self-locking mechanism further includes a back-off hook 12 and a ratchet stop block cover 15; Figure 7 As shown, the ratchet stop block 3 is provided with a second linear motion guide groove 18, and the ratchet stop block cover 15 is fixedly connected to the base plate 10 via a ratchet stop block guide bolt shaft 16 passing through the second linear motion guide groove 18, as shown in FIG. Fig.12 Or as shown in 14; the second end of the ratchet stop block 3 is provided with a ratchet stop block pin 7, which is used to cooperate with the backstop hook 12 and the unlocking hook 25 respectively. Figure 3 As shown, the first end of the stop hook 12 is rotatably connected to the ratchet stop block cover 15; Figure 4 As shown, when the first end of the ratchet stop block 3 moves into the ratchet position opening, the second end of the backstop hook 12 rotates and hooks the ratchet stop block pin 7; the ratchet stop block cover 15 is provided with a backstop hook spring 13, which contacts or connects with the second end of the backstop hook 12, as shown in FIG. Figure 3 As shown, the back-stop hook 12 is used to hook the ratchet stop block pin 7 under the action of its spring; Fig.16 As shown in Fig. 17, when the unlocking hook 25 rotates, the stop hook 12 can be pushed away from the ratchet stop block pin 7, and the ratchet stop block 3 is driven to move in the opposite direction of the ratchet position opening through the ratchet stop block pin 7; the first linear motion guide groove 17 is a pair of guide grooves symmetrically arranged on both sides of the stop hook 12, as shown in Figs. Figure 4 As shown in or 7, a ratchet stopper guide bolt shaft 16 and a ratchet stopper spring 11 are provided therein.

[0072] The first end of the anti-retraction hook 12 can be sleeved on one end of the anti-retraction hook shaft 14. The other end of the anti-retraction hook shaft 14 is fixedly connected to the ratchet stop block cover 15. Figure 3 As shown, the backstop hook 12 can rotate around the backstop hook shaft 14. When the door lock is in the initial state, the ratchet stop block 3 is blocked by the ratchet 2 and does not enter the ratchet position opening. The backstop hook 12 is attached to the outer circle of the ratchet stop block pin 7 under the action of the backstop hook spring 13, as shown in FIG. Figure 3 As shown; when the door lock is closed, the ratchet stop block 3 enters the ratchet position opening formed by the double ratchets and stops at the end face of the front guide plate 6, and the ratchet stop block pin 7 reaches the arc surface position of the stop hook 12 at the same time. Under the action of the stop hook spring 13, the arc surface of the stop hook 12 is attached to the ratchet stop block pin 7 to hook the ratchet stop block pin 7, forming a dead point, thereby effectively avoiding accidental unlocking due to severe impact, vibration and the like.

[0073] When unlocking is required, the unlocking hook 25 can be driven to rotate by the handle 24, so that the locking hook 12 hooked on the ratchet stop block pin 7 can be pushed open by the unlocking hook 25. Fig.15 Or as shown in 16, and when continuing to rotate, the unlocking hook 25 hooks the ratchet stop block pin 7. After hooking the ratchet stop block pin 7, the ratchet stop block 3 can be driven to move backward through the ratchet stop block pin 7 fixed to the ratchet stop block 3, as shown in FIG. Fig.17 As shown, the ratchet stop block 3 is retracted from the ratchet position opening to release the lock of the double ratchets, so that the double ratchets are opened outwards under the action of the spring force to achieve the unlocking operation.

[0074] Since the present application is mainly used for special vehicles with heavy loads, severe impacts, severe and complex vibrations, etc., in order to achieve multiple protections against accidental unlocking, the present application also provides an anti-locking and locking mechanism on the bottom plate 10.

[0075] like Fig.12 As shown, the special vehicle door lock with double ratchet holding and locking mechanism also includes an anti-locking and locking mechanism; the anti-locking and locking mechanism includes an anti-locking plate 33, an anti-locking plate shifting block 30, and an anti-locking device for rotating the anti-locking plate shifting block 30; the anti-locking plate 33 is provided with at least two strip grooves, which slide within the range of the strip grooves through the axial screws 29 fixed to the base plate 10; the first end of the anti-locking plate 33 is provided with an upper limit gear and a lower limit gear, and the second end is provided with a step; the anti-locking plate shifting block 30 is movably arranged on the base plate 10 through a rotating shaft; the anti-locking plate shifting block 30 is provided with a guide block, located between the upper limit gear and the lower limit gear of the anti-locking plate 33, and can drive the anti-locking plate 33 to move up and down by rotation; the anti-locking plate shifting block 30 is provided with a back-off hook anti-locking block 27 that can rotate with it; as shown Fig. 20 Or as shown in 21, when the anti-locking plate block 30 drives the anti-locking plate 33 to move down to the extreme position, the anti-locking block 27 of the back-off hook limits the back-off hook 12 from disengaging from the ratchet stop block pin 7, and at the same time, the step at the second end of the anti-locking plate 33 limits the ratchet stop block 3 from disengaging from the ratchet position opening.

[0076] Driven by the rotation of the anti-lock plate block 30, the anti-lock hook anti-lock block 27 of the anti-lock mechanism can limit the anti-lock hook 12, so that it remains in the dead point state of hooking the ratchet stop block pin 7, and even the rotation of the unlocking hook 25 cannot open it. At the same time, the step of the anti-lock plate 33 also moves to the rearward position of the ratchet stop block 3, so that it cannot move backward to form a dead point, and thus cannot escape from the ratchet position opening, ensuring that the double ratchets hold the lock cylinder 1 tightly to avoid accidental unlocking.

[0077] like Fig.18As shown, the anti-locking device includes an anti-locking knob 31 and / or an automatic locking push-pull rod 32; the anti-locking knob 31 is fixedly connected to the anti-locking plate shift block 30, and can be manually rotated to rotate the anti-locking plate shift block 30. The automatic locking push-pull rod 32 has one end connected to the anti-locking plate shift block 30 and the other end connected to the vehicle-mounted central control locking motor, so that the driver can uniformly lock or unlock the door locks on multiple doors through the central control.

[0078] In addition, the driver can also control the unlocking mechanism by rotating the central control handle sleeve 23 and the like.

[0079] The back-stop hook anti-locking block 27 can be fixedly arranged on the anti-locking plate shifting block 30, so as to rotate with the anti-locking plate shifting block 30. After the anti-locking and locking operation, the back-stop hook anti-locking block 27 supports the back-stop hook 12 to limit its rotation, thereby preventing the self-locking mechanism from failing after locking. At the same time, the unlocking hook 25 cannot drive the back-stop hook 12 to rotate, thereby limiting the unlocking operation.

[0080] The anti-lock plate block 30 is mounted on the corresponding hole of the bottom plate. The anti-lock plate block 30 can rotate within a range of 90 degrees, and the two extreme positions are respectively the anti-lock unlocking position and the anti-locking locking position. In the anti-locking locking position, the anti-lock plate 33 restricts the ratchet stop block 3 from disengaging from the double ratchet. Fig.12 As shown in FIG. 18 , three strip grooves are provided on the anti-locking plate 33. Within the 90-degree angle range, the guide block of the anti-locking plate shifting block 30 can push the anti-locking plate 33 to the upper limit gear position or the lower limit gear position, so that the anti-locking plate 33 moves linearly along the strip grooves to reach the two end limit positions. The two end limit positions are the dead point positions, and at these two dead point positions, the anti-locking plate 33 cannot move linearly along the strip grooves to push the anti-locking plate shifting block 30 to rotate.

[0081] The anti-locking knob 31 is provided on the anti-locking plate shift block 30, and is for the personnel in the vehicle to rotate and operate manually. Fig.14 As shown, it can be connected with the door key lock cylinder turning rod, and can be operated by people outside the vehicle turning with a key.

[0082] In order to prevent the anti-lock plate block 30 from rotating freely at the extreme positions at both ends, Fig.13 As shown, the anti-locking plate shifting block 30 is provided with an anti-locking plate shifting block spring 28; one end of the anti-locking plate shifting block spring 28 is connected to the bottom plate 10, and the other end is connected to the guide block of the anti-locking plate shifting block 30 to prevent the anti-locking plate shifting block 30 from rotating freely. Fig.19 As shown, one end of the anti-lock plate shift block spring 28 is connected to the bottom plate 10 through an axial screw 29. When the anti-lock plate shift block 30 rotates, as shown in FIG. Fig.19 As shown in 20, the anti-lock plate shift block spring 28 also moves therewith and pushes the anti-lock plate shift block 30 all the time to prevent the anti-lock plate shift block 30 from rotating.

[0083] In addition to the above-mentioned scheme, the anti-locking and locking mechanism can also limit the rotation of the handle shaft from the middle, both sides and other positions of the handle shaft.

[0084] The lock cylinder body 1 is mainly a lock cylinder matched with a double ratchet, which is arranged on the door frame. Fig. 20 As shown, the lock cylinder body part also includes a lock cylinder body lifting mechanism; the lock cylinder body lifting mechanism can drive the lock cylinder body 1 to rise or fall.

[0085] The lock cylinder lifting mechanism includes a lock cylinder seat 34, a double-headed screw rod 37, and a symmetrically arranged first T-shaped block 35 and a second T-shaped block 36; a lock cylinder seat U-shaped opening is provided in the middle of the lock cylinder seat 1 for the lock cylinder body 1 to move up and down; lock cylinder seat T-shaped slots that are compatible with the first T-shaped block 35 and the second T-shaped block 36 are provided on both sides of the lock cylinder seat 34; the double-headed screw rod 37 is provided with opposite threads passing through the first T-shaped block 35 and the second T-shaped block 36, which are compatible with the threaded holes of the first T-shaped block 35 and the second T-shaped block 36; the upper ends of the first T-shaped block 35 and the second T-shaped block 36 are symmetrically connected to the lock cylinder body 1 through multiple connecting rods 38 and a rotating shaft.

[0086] The T-shaped grooves of the lock cylinder seat on both sides of the lock cylinder seat 34 are mainly used for the horizontal sliding of the T-shaped blocks, and can well limit the movement of the two T-shaped blocks in the vertical direction so that they will not shift up and down due to vibration and the like. While enhancing the stability of the lock cylinder body lifting mechanism, it also prevents the upper lock cylinder body 1 from causing wear to the double ratchets that hold it tightly due to up and down movement.

[0087] Of course, the T-slot may also be in other shapes.

[0088] like Fig. 22 As shown in FIG. 23 , one end of the double-ended screw 37 is a left-handed thread, and the other end is a right-handed thread. The threaded holes of the two T-shaped blocks are adapted thereto, and four connecting rods 38 and four rotating shafts are used to flexibly connect the lock cylinder body 1 to the two T-shaped blocks. The principle is that rotating the double-ended screw 37 can make the two T-shaped blocks move inward or outward at the same time, and drive the lock cylinder body 1 to move up and down through the connecting rod 38 flexibly connected thereto. After the door is locked, rotating the double-ended screw 37 of the lock cylinder body component can further lift the lock cylinder, that is, further tighten the door. In some welded car body conditions with large deformation, this function can achieve effective sealing of the car door. In addition, the lifting function of the lock cylinder body also facilitates the adjustment of the locking position of different car doors.

[0089] The lock cylinder lifting component can also be other forms of lifting mechanisms, such as manual, electric, hydraulic drive and other driving methods for lifting operations.

[0090] Since most of the lock cylinders 1 are cylindrical, Figure 6 As shown, the gripping surface 9 of the ratchet 2 is an arc-shaped surface, and when the ratchet 2 is closed inward, a circular hole is formed, which is approximately a circular hole. The ratchet stop block 3 is rectangular, so the shapes of the ratchet position opening and the ratchet fixing plate opening are adapted to the shape of the first end of the ratchet stop block 3, which is approximately a rectangular opening. The shape adapted to the lock column and the ratchet stop block 3 can facilitate the double ratchets to grip the lock column body 1, and facilitate the clearance fit between the double ratchets and the ratchet stop block 3, thereby reducing the wear of the double ratchets and the ratchet stop block 3 caused by the vehicle door due to vibration and other reasons, and extending their service life.

[0091] The front guide plate opening is a trumpet-shaped opening that aligns the center position when colliding with the lock cylinder body 1, and a short straight line plus a semicircular opening, which is used to transfer the weight, impact and other loads of the door perpendicular to the ground to the lock cylinder, protecting the ratchet 2 from being affected by the load in this direction.

[0092] like Figure 8 As shown in Fig. 10, at least one pair of ratchet fixing plate feet 21 are symmetrically provided on both sides of the ratchet fixing plate 19. The ratchet fixing plate feet 21 can also be placed on the end surface of the front guide plate 6, and the ratchet fixing plate and the front guide plate are connected as one by welding. The ratchet fixing plate feet 21 are used to limit the degree of outward opening of the ratchet 2. When the locking column is released to squeeze the arcuate surface of the double ratchet teeth, the double ratchet teeth gradually open under the action of the ratchet reset spring 22. When the double ratchet teeth stop surface is attached to the inner end surface of the ratchet fixing plate feet 21 above the ratchet fixing plate, the double ratchet teeth stop opening.

[0093] like Figure 2 As shown in Figures 8 or 10, at least one pair of support shafts 4 fixed to the front guide plate 6 are symmetrically provided on both sides of the ratchet fixing plate 19. One end of the ratchet shaft 5 and the support shaft 4 can be fixed to the corresponding hole of the ratchet fixing plate 19 by riveting or welding; the other end of the ratchet shaft 5 and the support shaft 4 passes through the corresponding hole of the front guide plate 6 and is fixed to the front guide plate 6 by riveting or welding.

[0094] The front guide plate 6 can be directly fixed on the bottom plate 10. Figure 8 As shown in FIG. 24 , the two sides of the front guide plate 6 are fixedly connected to the bottom plate 10 through symmetrically arranged support blocks 20, so as to better share the impact force when the lock cylinder body 1 crashes in. The support blocks 20 can be connected to the front guide plate 6 by welding.

[0095] like Fig.11 As shown, the handle sleeve 23, the unlocking hook 25 and the handle 24 are rotatably connected via a rotating shaft, and the rotating sleeve is provided with a handle reset spring 26, which is used to reset the unlocking hook 25 and the handle 24 to the initial position. In the initial position, the unlocking hook 25 does not contact the backstop hook 12 and the ratchet stop block pin 7, so as not to affect the movement of the ratchet stop block 3.

[0096] The bottom plate 10 is provided with a plurality of corresponding holes. The corresponding holes are equipped with a handle sleeve 23, which can rotate in the corresponding hole of the bottom plate. One end of the handle sleeve 23 is sleeved with a handle return spring 26, an unlocking hook 25, and a handle 24, and the other end can be driven by a motor, or a square hole can be set at the other end to connect with the handle rotating rod outside the door, so that the handle outside the door can drive the handle sleeve 23 to rotate.

[0097] like Fig.14 As shown, the other corresponding holes of the base plate 10 are opposite to the linear motion guide groove and the strip groove, and the ratchet stop block guide bolt shaft and the lower end of the axial screw 29 pass through and connect the bolts to facilitate the movement of the ratchet stop block 3, the anti-locking plate 33 and other components relative to the base plate 10.

[0098] The ratchet stop block 3 can move linearly along the guide groove between the base plate 10 and the ratchet stop block cover 15. The upper end of the ratchet stop block guide bolt shaft 16 provided in the first linear motion guide groove 17 and the second linear motion guide groove 18 can be screwed into the ratchet stop block cover 15 to achieve the fixation of the ratchet stop block cover 15 and the backstop hook 12 thereon to the base plate 10. Of course, the ratchet stop block cover 15 can also be fixedly connected to the base plate 10 through a connecting rod or other structure. The backstop hook spring 13, the backstop hook rotating shaft 14, and the backstop hook 12 are assembled on the ratchet stop block cover 15. When the ratchet stop block 3 is fully popped out under the action of the ratchet stop block spring 11, the arc surface of the back-off hook 12 is attached to the outer circle of the ratchet back-off hook pin 7 under the action of the back-off hook spring 13, hooking the ratchet back-off hook pin 7 and forming a dead point, so that the ratchet stop block 3 can no longer move along the guide groove in the direction of compressing the ratchet stop block spring 11.

[0099] like Figure 3 As shown in Fig. 4, the stop hook 12 is rotatably connected to the ratchet stop block cover 15 via the stop hook shaft 14; the stop hook spring 13 is sleeved on the stop hook shaft 14, located between the stop hook 12 and the ratchet stop block cover 15, and contacts or connects with the second end of the stop hook 12, so that the stop hook 12 hooks the ratchet stop block pin 7 under the action of the stop hook spring 13 to form a dead point. The stop hook spring 13 can also be installed in other positions, such as the ratchet stop block cover 15 close to the side of the stop hook 12, so as to achieve the application of spring force to the stop hook 12.

[0100] Working principle:

[0101] 1. Working principle of ratchet part:

[0102] The ratchet component is composed of a support block 20, a front guide plate 6, a support shaft 14, a ratchet shaft 5, a ratchet 2, a ratchet reset spring 22, and a ratchet fixing plate 19. The ratchet reset spring 22 and the ratchet 2 are inserted into the ratchet shaft 5.

[0103] When the door lock is in the initial state, the double ratchets are in the open position, and the ratchet stop block 3, under the action of the spring, has one end face pressed against the end face of the double ratchets. Figure 1 shown.

[0104] When the door lock is closed, the lock cylinder hits the arc surface of the double ratchet teeth to rotate. When the outer circle of the lock cylinder squeezes the arc surface of the double ratchet teeth, the double ratchet teeth can rotate and compress the ratchet reset spring 22. The arc surface of the double ratchet teeth gradually closes to form a circular hole shape to hold the lock cylinder, and the ratchet position of the double ratchet teeth gradually forms a rectangular opening. At this time, the ratchet stop block 3 will enter the rectangular opening under the action of the spring, and the double ratchet teeth are blocked by the ratchet stop block 3 and cannot rotate to release the lock cylinder, completing the locking. Figure 2 shown.

[0105] 2. Working principle of self-locking mechanism:

[0106] When the door lock is in the initial state, the ratchet stop block 3 is in the retracted position. Figure 3 As shown, one end face of the ratchet stop block 3 is pressed against the end face of the double ratchet, the ratchet stop block spring 11 is in a compressed state, and the back-off hook 12 is pressed against the outer circle of the ratchet stop block pin 7 under the action of the back-off hook spring 11.

[0107] When the door lock is closed, the ratchet stop block 3 quickly pops out into the rectangular opening formed by the rotation of the double ratchets under the action of the spring, and stops at the end surface of the front guide plate 6. The ratchet stop block pin 7 simultaneously reaches the arc surface position of the backstop hook 12. Under the action of the backstop hook spring 13, the backstop hook 12 is attached to the ratchet stop block pin 7 with its arc surface, forming a dead point. Figure 4 As shown, the ratchet stop block 3 can no longer move along the guide groove in the direction of compressing the ratchet stop block spring 11, preventing the ratchet stop block 3 from retreating due to severe impact and vibration. The stop hook 12, the stop hook spring 13, and the ratchet stop block pin 7 are a self-locking mechanism after locking.

[0108] 3. Working principle of anti-locking and unlocking mechanism:

[0109] Anti-lock operation:

[0110] After the door is locked, the anti-lock knob 31 is rotated or the automatic locking push rod 32 is pushed. Fig.19 As shown, the anti-lock plate shift block 30 is disengaged from the upper limit gear position of the anti-lock plate 33 opening, moves to the lower limit gear position, and pushes the anti-lock plate 33 to move downward when it contacts the anti-lock plate inclined surface; continue to rotate the anti-lock knob 31 or push the automatic locking push rod 32, as shown in FIG. Fig. 20 As shown, the anti-locking plate shift block 30 pushes the anti-locking plate 33 to continue moving until it reaches the lower limit gear position of the anti-locking plate 33, and the anti-locking stopper 27 rotates with the anti-locking plate shift block 30 to complete the anti-locking locking action. Fig. 20As shown in 21, the anti-locking action occurs, the anti-locking plate limits the movement of the ratchet stop block, and the anti-locking block of the back-out hook limits the rotation of the back-out hook, thereby limiting the rotation of the unlocking hook and the handle shaft, completing the anti-locking action to prevent accidental unlocking.

[0111] Unlock operation:

[0112] The handle 24 is rotated to drive the unlocking hook 25 to rotate, and the unlocking hook 25 first lifts the stop hook 12. Fig.15 As shown, the arc surface of the stop hook 12 gradually moves away from the ratchet stop block pin 7; continue to rotate the handle 24 to drive the unlocking hook 25 to rotate, as shown in FIG. Fig.16 As shown, the unlocking hook 25 continues to lift the stop hook 12, and the arc surface of the unlocking hook 25 contacts the outer circle of the ratchet stop block pin 7; after the arc surface of the unlocking hook 25 contacts the outer circle of the ratchet stop block pin 7, continue to rotate the handle 24 to drive the unlocking hook 25 to rotate, as shown in FIG. Fig.17 As shown, the unlocking hook 25 drives the ratchet stop block pin 7 to drive the ratchet stop block 3 to move along the compression direction of the ratchet stop block spring 11 until it reaches the limit position where the first ratchet stop block guide groove 17 contacts the ratchet stop block guide bolt shaft 16, that is, the ratchet stop block 3 gradually disengages from the double ratchet, and the double ratchet rotates after losing the restriction of the ratchet stop block 3, releasing the lock cylinder 1, and completing the unlocking.

[0113] 4. Working principle of the lock cylinder lifting mechanism:

[0114] like Fig.23 As shown, when the double-ended screw rod 37 is rotated clockwise or counterclockwise, the left and right T-shaped blocks move closer or farther away, and the lock cylinder body 1 can move up or down under the restriction of the U-shaped opening of the lock cylinder seat.

[0115] The following is the complete closing and opening process of the door lock.

[0116] The complete closing process of the door lock:

[0117] like Fig.24 As shown, the lock cylinder is usually installed on the door frame, and the lock body is installed on the door. In the initial state of the door lock being opened, the end face of the ratchet stop block 3 is against the double ratchet end face, and the backstop hook 12 is placed on the ratchet stop block pin 7.

[0118] like Fig.25As shown, when the door is closed, the double ratchets of the lock body hit the lock cylinder body 1. After the double ratchets hit the lock cylinder of the lock cylinder body 1, they squeeze each other, and the arc surfaces of the double ratchets rotate towards each other and compress the ratchet reset spring 22. The double ratchets gradually hold the lock cylinder, and the ratchet position of the double ratchets gradually opens to form an approximately rectangular opening. When the ratchet position is opened to the point where the ratchet stop block 3 is sufficient to enter the opening, under the action of the ratchet stop block spring 11, the ratchet stop block 3 enters the opening and stops at the end face of the front guide plate 6. The ratchet stop block push pin 7 set on the ratchet stop block 3 also enters the arc surface position of the stop hook 12, and the stop hook 12 hooks the ratchet stop block push pin 7 under the action of the stop hook spring 13. At this point, the door lock locking action is completed.

[0119] like Fig.26 As shown, after the door is locked, the double-ended screw 37 of the lock cylinder body can be rotated to further lift the lock cylinder, that is, to further tighten the door. In the case of some welded car bodies with large deformation, this function can effectively close the door. In addition, the lifting function of the lock cylinder body 1 also facilitates the adjustment of the locking position of different doors.

[0120] like Fig. 27 As shown, the anti-lock knob 31 or the external key or the vehicle-mounted central control motor is turned to push the automatic locking push-pull rod 32 to the extreme position, the anti-lock plate 33 moves downward and limits the movement of the ratchet stop block 3, and the anti-lock block 27 of the anti-retraction hook limits the rotation of the anti-retraction hook 12 and further limits the rotation of the handle shaft, completing the anti-locking action.

[0121] The complete opening process of the door lock:

[0122] like Fig.28 As shown, the reverse anti-lock knob 31 or the external key or the vehicle-mounted central control motor pulls the automatic locking push-pull rod 32 to the extreme position, the anti-lock plate 33 moves upward and releases the restriction on the ratchet stop block 3, the anti-lock block 27 of the back-out hook 12 releases the restriction on the back-out hook 12 and then releases the rotation restriction on the unlocking hook 25 and the handle shaft, completing the anti-lock release action.

[0123] like Fig.29 As shown, after the handle 24 is rotated, the unlocking hook 25 first lifts the stop hook 12 to disengage the ratchet stop block pin 7.

[0124] like Fig.30 As shown, the handle 24 is further rotated, and the unlocking hook 25 hooks the pawl stop block pin 7, driving the ratchet stop block 3 to gradually disengage from the approximately rectangular opening of the double ratchet position, thereby releasing the rotation restriction on the double ratchet.

[0125] like Fig.31 As shown, under the action of the rebound of the door sealing rubber and the ratchet reset torsion spring 22, the double ratchets rotate to open, the double ratchets release the lock column, and the door lock opens, that is, the door opens.

[0126] like Fig.24 As shown, after releasing the handle 24, the double ratchets are already in the open state, and the ratchet position opening is closed to prevent the ratchet stop block 3 from passing through. The ratchet stop block 3 is pressed against the double ratchet end face under the action of the ratchet stop block spring 11, and the back-off hook 12 is placed on the ratchet stop block pin 7 under the action of the back-off hook spring 13. Prepare for the next locking action.

[0127] The ratchet component, self-locking mechanism, unlocking mechanism, and anti-locking and locking mechanism of the door lock of the present invention are not in the same plane or direction. The self-locking mechanism and the anti-locking and locking mechanism are both set with dead points, and have multiple functions to prevent accidental unlocking. It is especially competent for working conditions such as large loads, severe impacts, and severe and complex vibrations of tracked special vehicles. The present invention can be connected to central control locking functions such as one-button operation on the driving console, remote control operation, and automatic locking during driving. The lock cylinder component of the present invention is particularly suitable for the rapid adjustment of the locking position when there are large differences in the welded body and doors, and can also further tighten the door.

[0128] The fixed connection not specifically mentioned above may be a connection method such as riveting, welding, bolt connection, etc., and the movable connection may be a connection method such as hinged connection.

Claims

1. A special vehicle door lock with double ratchet holding and locking mechanism, It is characterized in that include: A lock cylinder component, comprising a lock cylinder body (1); Bottom plate (10); A ratchet component is arranged on the base plate (10), comprising a pair of symmetrically arranged ratchets (2), a front guide plate (6) and a ratchet fixing plate (19); the inner sides of the ratchets (2) are provided with a clamping surface (9) and a ratchet position (8); when the two ratchets (2) are closed inwardly, the two clamping surfaces form a ratchet clamping opening for clamping the lock cylinder body (1), and the two ratchet positions (8) form a ratchet position opening; the front guide plate (6) is arranged on one side of the ratchet (2), and is provided with a front guide plate opening for passing through at the corresponding position where the lock cylinder body (1) hits ; The ratchet fixing plate (19) is arranged on the other side of the ratchet (2), and two ratchet shafts (5) are symmetrically arranged thereon; the ratchet shafts (5) respectively pass through the two ratchet teeth (2) and are connected to the front guide plate (6); the ratchet fixing plate (19) is provided with a ratchet fixing plate opening matched with the ratchet position opening; a pair of ratchet reset springs (22) are symmetrically arranged between the ratchet (2) and the ratchet fixing plate (19), and are respectively sleeved on the two ratchet shafts (5) for applying an elastic force to the ratchet (2) to open outward; The self-locking mechanism comprises a ratchet stop block (3); the first end of the ratchet stop block (3) is located at the opening of the ratchet fixing plate, and is in contact with the end faces of the two ratchet teeth (2) when the ratchet teeth (2) are opened outward; the ratchet stop block (3) is provided with a first linear motion guide groove (17), and a ratchet stop block guide bolt shaft (16) and a ratchet stop block spring (11) are provided in the first linear motion guide groove (17); the ratchet stop block guide bolt shaft (16) passes through the first linear motion guide groove (17) and is fixedly connected to the bottom plate (10), and is used for maintaining the elastic force of the ratchet stop block (3) moving in the direction of the ratchet teeth (2) through the ratchet stop block spring (11); An unlocking mechanism is provided on the base plate (10), comprising a coaxially arranged handle (24), an unlocking hook (25) and a handle sleeve (23); the unlocking hook (25) can rotate with the rotation of the handle (24) and can drive the ratchet stop block (3) to move in the opposite direction of the ratchet position opening; the handle sleeve (23) is connected to the base plate (10).

2. The double ratchet holding and locking mechanism special vehicle door lock according to claim 1, It is characterized in that The self-locking mechanism further comprises a back-off hook (12) and a ratchet stop block cover (15); the ratchet stop block (3) is provided with a second linear motion guide groove (18), and the ratchet stop block cover (15) is fixedly connected to the base plate (10) via a ratchet stop block guide bolt shaft (16) passing through the second linear motion guide groove (18); a ratchet stop block push pin (7) is provided at the second end of the ratchet stop block (3); the first end of the back-off hook (12) is rotatably connected to the ratchet stop block cover (15); when the first end of the ratchet stop block (3) moves into the ratchet position opening, the second end of the back-off hook (12) rotates and hooks the ratchet stop block push pin (7) ); the ratchet stop block cover (15) is provided with a back-off hook spring (13), which contacts or is connected to the second end of the back-off hook (12), so that the back-off hook (12) can hook the ratchet stop block pin (7) under the action of its spring; when the unlocking hook (25) rotates, it can push the back-off hook (12) away from the ratchet stop block pin (7), and drive the ratchet stop block (3) to move in the opposite direction of the ratchet position opening through the ratchet stop block pin (7); the first linear motion guide groove (17) is a pair of guide grooves symmetrically arranged on both sides of the back-off hook (12), and ratchet stop block guide bolt shaft (16) and ratchet stop block spring (11) are arranged in each of them.

3. The double ratchet holding and locking mechanism special vehicle door lock according to claim 2, It is characterized in that The anti-locking mechanism also includes an anti-locking and locking mechanism; the anti-locking and locking mechanism includes an anti-locking plate (33), an anti-locking plate shifting block (30), and an anti-locking device for rotating the anti-locking plate shifting block (30); the anti-locking plate (33) is provided with at least two strip grooves, and slides within the range of the strip grooves through an axial screw (29) fixedly connected to the bottom plate (10); the first end of the anti-locking plate (33) is provided with an upper limit gear position and a lower limit gear position, and the second end is provided with a step; the anti-locking plate shifting block (30) is movably arranged on the bottom plate (10) through a rotating shaft; the anti-locking plate shifting block (30) is provided with a guide The anti-lock plate shift block (30) is located between the upper limit gear position and the lower limit gear position of the anti-lock plate (33), and can drive the anti-lock plate (33) to move up and down by rotating; the anti-lock plate shift block (30) is provided with a back-off hook anti-lock block (27) that can rotate with it; when the anti-lock plate shift block (30) drives the anti-lock plate (33) to move downward to the limit position, the back-off hook anti-lock block (27) limits the back-off hook (12) from disengaging from the ratchet stop block pin (7), and at the same time, the step at the second end of the anti-lock plate (33) limits the ratchet stop block (3) from disengaging from the ratchet position opening.

4. The double ratchet holding and locking mechanism special vehicle door lock according to claim 3, It is characterized in that The anti-locking device comprises an anti-locking knob (31) and / or an automatic locking push-pull rod (32); the anti-locking knob (31) is fixedly connected to the anti-locking plate shift block (30); the automatic locking push-pull rod (32) is used to connect to a vehicle-mounted central control locking motor.

5. The double ratchet holding and locking mechanism special vehicle door lock according to claim 3, It is characterized in that The anti-locking plate shifting block (30) is provided with an anti-locking plate shifting block spring (28); one end of the anti-locking plate shifting block spring (28) is connected to the bottom plate (10), and the other end is connected to the guide block of the anti-locking plate shifting block (30) to prevent the anti-locking plate shifting block (30) from rotating freely.

6. The double ratchet holding and locking mechanism special vehicle door lock according to claim 2, It is characterized in that The lock cylinder body part also includes a lock cylinder body lifting mechanism; the lock cylinder body lifting mechanism can drive the lock cylinder body (1) to rise or fall.

7. The double ratchet holding and locking mechanism special vehicle door lock according to claim 6, It is characterized in that The lock cylinder lifting mechanism comprises a lock cylinder seat (34), a double-headed screw rod (37), and a first T-shaped block (35) and a second T-shaped block (36) which are symmetrically arranged; a lock cylinder seat U-shaped opening for the lock cylinder body (1) to move up and down is provided in the middle of the lock cylinder seat (34); lock cylinder seat T-shaped grooves which are adapted to the first T-shaped block (35) and the second T-shaped block (36) are provided on both sides of the lock cylinder seat (34); opposite threads are provided at the places where the double-headed screw rod (37) passes through the first T-shaped block (35) and the second T-shaped block (36), and are adapted to the threaded holes of the first T-shaped block (35) and the second T-shaped block (36); the upper ends of the first T-shaped block (35) and the second T-shaped block (36) are symmetrically connected to the lock cylinder body (1) through a plurality of connecting rods (38) and a rotating shaft.

8. The double ratchet holding and locking mechanism special vehicle door lock according to claim 1, It is characterized in that The gripping surface (9) of the ratchet (2) is an arc-shaped surface, and a circular hole is formed when the ratchet (2) is closed inwardly; the shapes of the ratchet position opening and the ratchet fixing plate opening are adapted to the shape of the first end of the ratchet stop block (3); the front guide plate opening is a trumpet-shaped opening for aligning the center position when colliding with the lock cylinder body (1), and a short straight line plus a semicircular opening are used to transfer the load to the lock cylinder body (1).

9. The double ratchet holding and locking mechanism special vehicle door lock according to claim 1, It is characterized in that At least one pair of ratchet fixing plate feet (21) are symmetrically arranged on both sides of the ratchet fixing plate (19); the ratchet fixing plate feet (21) are used to limit the degree of outward opening of the ratchet (2); at least one pair of support shafts (4) fixedly connected to the front guide plate (6) are symmetrically arranged on both sides of the ratchet fixing plate (19); the front guide plate (6) is fixedly connected to the bottom plate (10) via symmetrically arranged support blocks (20); the handle shaft sleeve (23), the unlocking hook (25) and the handle (24) are rotatably connected via a rotating shaft, and the rotating shaft sleeve is provided with a handle reset spring (26) for resetting the unlocking hook (25) and the handle (24) to an initial position.

10. The double ratchet holding and locking mechanism special vehicle door lock according to claim 2, It is characterized in that The stop hook (12) is rotatably connected to the ratchet stop block cover (15) via a stop hook rotating shaft (14); the stop hook spring (13) is sleeved on the stop hook rotating shaft (14) and is in contact with or connected to the second end of the stop hook (12).

Images