CN111827805A - Rear door lock mechanism of van - Google Patents

Abstract

The invention belongs to the field of the rear door lock mechanism of a van, in particular to a rear door lock mechanism of a van, which comprises a cargo compartment, a door leaf, a rotating shaft, a clamping block, a fixed block, a positioning block, a pendulum block, a sliding rod, a sliding pin, a circular Sleeves, limit blocks, limit springs, etc., wherein two vertical rotating shafts are symmetrically installed on the two door leaves of the rear door of the cargo compartment, and each rotating shaft is rotatably matched with three supports installed on the door leaves; The combination of the limit block and the arc-shaped grooves on the two same-side clamping blocks on the rotating shaft realizes the locking of the cargo door leaf that is closed by itself under the action of wind, so as to avoid the two doors of the cargo compartment when the driver does not check whether the cargo door leaf is not. When the vehicle is turned off and driving on the road, the reciprocating switch swings due to road bumps, thus effectively preventing the cargo in the cargo compartment from falling and being damaged due to bumps on the road, reducing the economic loss of freight.

Description

A rear door lock mechanism of a van truck

technical field

The invention belongs to the field of the rear door lock mechanism of a van, in particular to a rear door lock mechanism of a van.

Background technique

The existing van without the rear door self-locking function is not locked when the rear door is closed by strong winds or unintentional people after the loading is completed, and the driver of the truck also forgets to check the cargo compartment when he gets on the vehicle and drives on the road. Whether the back door is closed. When encountering a bumpy road, the cargo in the cargo compartment is likely to fall from the rear door due to bumps, causing damage. At the same time, the door leaf of the cargo compartment, which swings open and closes due to bumps, poses a certain threat to the safety of pedestrians or other vehicles, and has a great potential safety hazard.

For a van with a self-locking function of the rear door of the cargo compartment, when the porter entering the cargo compartment is stacking goods in the cargo compartment, the rear door leaf of the cargo compartment is automatically closed and locked under the action of wind, causing the porter to was closed in the carriage. If all the work of loading and unloading goods is undertaken by the driver alone, the driver who is locked in the carriage cannot get out in time with the help of others, which will inevitably affect the loading and unloading and timely delivery of goods.

In view of the problems existing in the above two types of vans, it is necessary to design a rear door lock mechanism of the van with self-locking function that can be unlocked from the cargo compartment.

The present invention designs a rear door lock mechanism of a van to solve the above problems.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned defects in the prior art, the present invention discloses a rear door lock mechanism of a van truck, which is realized by adopting the following technical solutions.

It should be noted in the description of the present invention that the terms "inside", "outside", "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the product of the invention The orientation or positional relationship that is usually placed in use is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood to limit the present invention. Furthermore, the terms "first", "second", etc. are only used to differentiate the description and should not be construed to indicate or imply relative importance.

The utility model relates to a rear door lock mechanism of a van, which comprises a cargo compartment, a door leaf, a rotating shaft, a clamping block, a leaf spring, a swing rod, a U-shaped seat, a fixed block, a positioning block, a swing block, a sliding rod, a sliding pin, a round sleeve, Screw, internal thread sleeve, torsion wheel, limit block, limit spring, thin steel wire, two vertical shafts are symmetrically installed on the two door leaves of the rear door of the cargo compartment, and each shaft is connected with the three Each shaft is connected to the corresponding door leaf through a leaf spring that is rotated and reset; two clamping blocks are installed at both ends of each shaft along the axial direction at intervals; The two ends of the two rotating shafts are one-to-one corresponding fixed blocks, and each fixed block is installed with a positioning block; each positioning block is hinged with a pendulum block whose one end is matched with the two clamping blocks on one end of the corresponding rotating shaft.

The end of the pendulum block that does not cooperate with the clamping block is hinged with the sliding rod sliding in the chute A on the cargo box through the sliding pin parallel to the rotating shaft; the sliding pin is installed on one end of the sliding rod, and the sliding pin slides on the sliding groove C on the pendulum block The end of each sliding rod is equipped with a circular sleeve with a concentric axis, and the circular sleeve is located in the transmission groove on the inner wall of the cargo box; the screw that is screwed with the inner threaded sleeve installed in the transmission groove is rotated with the circular sleeve; the screw A manually rotating torsion wheel is installed at the end; each fixed block is slidingly fitted with a limit block matched with the arc groove on the corresponding clamping block along the direction parallel to the central axis of the rotating shaft, and the limit block is nested with its reset The limit spring is provided on the limit block; the limit block is provided with a driving inclined plane which is matched with the clamping block; the end of the pendulum block that cooperates with the corresponding two clamping blocks drives the corresponding limit block to move through a thin steel wire. The limit block is provided with a driving inclined surface that cooperates with the clamping block. The driving inclined surface ensures that the clamping block with the arc groove interacts with the limiting block and completes the automatic locking of the door leaf when the door leaf is automatically closed. The matched end drives the corresponding limit block to move through the thin wire. Each rotating shaft is hinged with a swing rod that swings in the vertical direction; the swing rod cooperates with a U-shaped seat installed on the corresponding door leaf, so as to limit the rotation of the rotating shaft.

As a further improvement of this technology, a ring sleeve A is nested and fixed on each of the above-mentioned rotating shafts, and one end of the swing rod is hinged between two lugs on the corresponding ring sleeve A; the door leaf is hinged to the rear door of the cargo compartment through hinges The pendulum block is H-shaped, the positioning block on the fixed block is hinged between the two ends of the pendulum block, and one end of the sliding rod is hinged between the two ends of the pendulum block that are not matched with the clamping block.

As a further improvement of the present technology, each of the above-mentioned rotating shafts is installed with a fixed plate, and the fixed plate is connected with the corresponding door leaf through a leaf spring; a ring sleeve B is installed on the screw rod, and the ring sleeve B rotates in the ring groove on the inner wall of the corresponding round sleeve .

As a further improvement of the present technology, the above-mentioned fixed block is provided with a rotation groove which is matched with one end of the corresponding rotating shaft, and the inner wall of the rotation groove is provided with two swing grooves which are respectively matched with the two clamping blocks. The rotating groove provides effective positioning for one end of the rotating shaft on the door leaf in the closed state, and the swing groove provides an active space for the clamping block to rotate with the rotating shaft. Four clamping blocks are symmetrically installed on the rotating shaft, and the two clamping blocks that are not matched with the corresponding pendulum blocks cooperate with another positioning block installed on the fixed block. The hinges on the locked door leaf are effectively positioned. The limit block slides in the chute B on the inner wall of the pendulum groove; the thin wire is connected with the fixed rod installed on the pendulum block; the fixed block is provided with a guide ring through the fixed seat, and the thin wire passes through the guide ring. The guide ring guides the thin wire to effectively pull the corresponding limit block in the direction of movement of the limit block, ensuring that the force of the pendulum block acting on the limit block through the thin wire is all used to pull the limit block to move, so that the pendulum block passes through the thin wire. The wire pulls the limit block to move more smoothly.

As a further improvement of the present technology, the rim of the torsion wheel is provided with anti-slip tooth patterns.

Compared with the traditional rear door lock mechanism of the van, the present invention realizes the locking of the cargo door that is closed by itself under the action of the wind through the cooperation of the limit block and the arc grooves on the two same-side clamping blocks on the rotating shaft. Avoid the reciprocating switch swing of the two doors of the cargo compartment due to road bumps when the driver drives on the road without checking whether the door of the cargo compartment is closed, thus effectively preventing the goods in the cargo compartment from falling due to bumps on the road. damage, reduce the economic loss of freight.

When the worker is carrying the goods, if the door leaf closes by itself under the action of the wind and the hauler is locked inside the cargo box, the hauler who is locked into the cargo box can rotate the two knobs at the upper and lower ends of the same door leaf, and the knobs pass through A series of transmissions drive the limit block to retract and unlock the closed door leaf. The porter can open the locked door leaf from the inside of the cargo compartment, thereby reducing the troubles caused by the door leaf closing by itself when the porter handles the goods. Delays in cargo handling due to haulers being locked into the cargo compartment.

The invention has simple structure and good use effect.

Description of drawings

Fig. 1 is the overall schematic diagram of the present invention.

Figure 2 is a partial schematic view of the present invention.

Figure 3 is a cross-sectional schematic diagram of the fitting of a fixed block, a positioning block, an H-shaped pendulum block, a sliding pin, a sliding rod, a round sleeve, a screw rod, an internal thread sleeve and a torsion wheel.

Figure 4 is a cross-sectional schematic diagram of the cooperation between the sliding rod, the sliding pin, the H-shaped pendulum block, the clamping block and the rotating shaft.

FIG. 5 is a schematic cross-sectional view of the H-shaped pendulum block, the clamping block and the limit block from two perspectives.

Figure 6 is a schematic diagram of the cooperation of the rotating shaft, the ring sleeve A, the pendulum rod and the U-shaped seat.

Figure 7 is a schematic diagram of an H-shaped pendulum block.

FIG. 8 is a schematic diagram of the cooperation between the fixed block and the positioning block.

FIG. 9 is a partial schematic diagram of the cooperation between the rotating shaft and the clamping block.

Figure 10 is a schematic view of the cargo compartment and its partial cross section.

Figure 11 is a schematic diagram of the cooperation between the rotating shaft, the fixing plate, the leaf spring and the door leaf.

Figure 12 is a schematic cross-sectional view of the circular sleeve.

Label names in the figure: 1. Cargo compartment; 2. Rear door; 3. Transmission groove; 4. Chute A; 5. Door leaf; 6. Hinge; 7. Rotating shaft; , support; 11, fixed plate; 12, leaf spring; 13, ring sleeve A; 14, swing rod; 15, U-shaped seat; 16, fixed block; 17, rotation groove; 18, swing groove; 19, chute B; 20, positioning block; 21, pendulum block; 22, chute C; 23, sliding rod; 24, sliding pin; 25, round sleeve; 26, ring groove; 27, screw rod; 28, ring sleeve B; 29, Internal thread sleeve; 30, torsion wheel; 31, anti-slip tooth pattern; 32, limit block; 33, drive bevel; 34, limit spring; 35, thin steel wire; 36, fixed rod; 37, guide ring; 38, fixed seat.

Detailed ways

The accompanying drawings are schematic diagrams of the implementation of the present invention, so as to facilitate the understanding of the operation principle of the structure. The specific product structure and proportions can be determined according to the use environment and conventional techniques.

As shown in Figures 1, 2, and 3, it includes a cargo compartment 1, a door leaf 5, a rotating shaft 7, a clamping block 8, a leaf spring 12, a swing rod 14, a U-shaped seat 15, a fixed block 16, a positioning block 20, and a pendulum block 21. ,, sliding rod 23, sliding pin 24, round sleeve 25, screw 27, internal thread sleeve 29, torsion wheel 30, limit block 32, limit spring 34, thin wire 35, among which, as shown in Figure 1, the cargo compartment 1 Two vertical rotating shafts 7 are symmetrically installed on the two door leaves 5 of the rear door 2, and each rotating shaft 7 is rotatably matched with the three supports 10 installed on the door leaf 5; as shown in Figures 1 and 11, each rotating shaft 7 are connected to the corresponding door leaf 5 through the leaf spring 12 that is rotated and reset; as shown in Figures 2, 4, and 9, two clamping blocks 8 are respectively installed at both ends of each rotating shaft 7 along the axial direction; Figure 1 As shown in , 2, 8, there are four fixed blocks 16 on the end face of the rear door 2 of the cargo compartment 1 that correspond to the two ends of the two rotating shafts 7 one-to-one, and each fixed block 16 is installed with a positioning block 20; Figure 2, 3 , 4, each positioning block 20 is hinged with a pendulum block 21 whose one end is matched with the two clamping blocks 8 on one end of the corresponding rotating shaft 7.

As shown in Figures 4, 5 and 7, the end of the pendulum block 21 that does not cooperate with the clamping block 8 is hinged with the sliding rod 23 sliding in the sliding groove A4 on the cargo box 1 through the sliding pin 24 parallel to the rotating shaft 7; the sliding pin 24 Installed on one end of the sliding rod 23, the sliding pin 24 slides in the chute C22 on the pendulum block 21; as shown in Figures 3 and 10, the end of each sliding rod 23 is installed with a circular sleeve 25 with a concentric axis, and the circular sleeve 25 It is located in the transmission groove 3 on the inner wall of the cargo box 1; the screw 27 that is screwed with the inner threaded sleeve 29 installed in the transmission groove 3 is rotatably matched with the circular sleeve 25; As shown in 5 and 9, each fixing block 16 is slidably fitted with a limit block 32 which is matched with the arc-shaped groove 9 on the corresponding clamping block 8 along the direction parallel to the central axis of the rotating shaft 7. The limit block 32 is nested with The limit spring 34 for its reset; the limit block 32 has a driving slope 33 that cooperates with the clamping block 8; the end of the pendulum block 21 that cooperates with the corresponding two clamping blocks 8 drives the corresponding limit block 32 to move through the thin wire 35 . The limit block 32 is provided with a driving inclined surface 33 that cooperates with the clamping block 8. The driving inclined surface 33 ensures that the clamping block 8 with the arc-shaped groove 9 interacts with the limit block 32 when the door leaf 5 is automatically closed and completes the automatic upward movement of the door leaf 5. Lock, the end of the pendulum block 21 that is matched with the corresponding block 8 drives the corresponding limit block 32 to move through the thin wire 35 . As shown in Figures 1 and 6, each rotating shaft 7 is hinged with a swing rod 14 that swings in the vertical direction; limits.

As shown in FIG. 6 , a ring sleeve A13 is nested and fixed on each of the above-mentioned rotating shafts 7, and one end of the swing rod 14 is hinged between the two lugs on the corresponding ring sleeve A13; as shown in FIG. 1, the door leaf 5 The hinge 6 is hinged to the rear door 2 of the cargo compartment 1; as shown in Figures 2, 3 and 7, the pendulum block 21 is H-shaped, and the positioning block 20 on the fixed block 16 is hinged between the two ends of the pendulum block 21. One end of the sliding rod 23 is hinged between two ends of the pendulum block 21 that are not matched with the clamping block 8 .

As shown in FIG. 11 , a fixing plate 11 is installed on each of the above-mentioned rotating shafts 7, and the fixing plate 11 is connected with the corresponding door leaf 5 through the leaf spring 12; as shown in FIGS. The sleeve B28 rotates in the annular groove 26 on the inner wall of the corresponding round sleeve 25 .

As shown in Figures 3, 5 and 8, the above-mentioned fixed block 16 is provided with a rotating groove 17 which is matched with one end of the corresponding rotating shaft 7. The inner wall of the rotating groove 17 is provided with two swing grooves 18 which are respectively matched with the two clamping blocks 8. The rotation slot 17 provides effective positioning for one end of the rotation shaft 7 on the door leaf 5 in the closed state, and the swing slot 18 provides a space for the clamping block 8 to rotate with the rotation of the rotation shaft 7 . As shown in FIGS. 4 and 9 , four clamping blocks 8 are symmetrically installed on the rotating shaft 7 , and the two clamping blocks 8 that do not cooperate with the corresponding pendulum blocks 21 cooperate with another positioning block 20 installed on the fixed block 16 . The positioning block 20 effectively positions the rotating shaft 7 on the door leaf 5 that has been closed and locked by cooperating with the four locking blocks 8 . As shown in Figures 5 and 8, the limit block 32 slides in the chute B19 on the inner wall of the pendulum groove 18; the thin wire 35 is connected to the fixing rod 36 installed on the pendulum block 21; There is a guide ring 37 through which the thin wire 35 is passed. The guide ring 37 guides the fine wire 35 to effectively pull the corresponding limit block 32 in the movement direction of the limit block 32, ensuring that the force of the pendulum block 21 acting on the limit block 32 through the fine wire 35 is all used to pull the limit block 32 moves, so that the pendulum block 21 pulls the limit block 32 through the thin wire 35 to move more smoothly.

As shown in FIG. 3 , the rim of the torsion wheel 30 has anti-slip serrations 31 .

The working process of the present invention: the open state of the door leaf 5 is taken as the initial state. In the initial state, the two leaf springs 12 are in a natural state, the swing rod 14 is perpendicular to the corresponding rotating shaft 7 and is in a horizontal state, and the swing rod 14 and the clamping block 8 are in a horizontal state. The corresponding door leaf 5 has an included angle of about 45 degrees. The pendulum block 21 is in a state of restricting the swinging of the locking block 8 in the pendulum groove 18 on the corresponding fixing block 16 . The end of the driving slope 33 of the limit block 32 is located in the corresponding swing groove 18 under the action of the corresponding limit spring 34, and the thin wire 35 is in a taut state. The limit springs 34 are all in a compressed state. The pendulum block 21 remains stationary under the action of the self-locking function of the corresponding screw 27 and the inner threaded sleeve 29 that cooperate with each other.

When the door leaf 5 needs to be closed and the closed state of the door leaf 5 needs to be locked, the door leaf 5 is manually closed to the rear door 2 of the cargo compartment 1 first. When the door leaf 5 is completely closed, the two ends of the rotating shaft 7 on the door leaf 5 just enter into the rotating grooves 17 on the corresponding fixing blocks 16 at the same time, respectively. 9. Another clamping block 8 distributed along the axial direction of the rotating shaft 7 is simultaneously inserted into the two swing grooves 18 on the corresponding fixing block 16 at an angle of 45 degrees, and the limit block 32 on the inner wall of the swing groove 18 enters the corresponding clamp. The arc-shaped groove 9 on the block 8 restricts the movement of the locking block 8 away from the swing groove 18 , thereby forming a lock for the reverse opening of the door leaf 5 .

During the process of the clamping block 8 entering the swing groove 18, the clamping block 8 interacts with the driving slope 33 on the limit block 32, so that the limit block 32 shrinks into the corresponding chute B19, and the limit spring 34 is further compressed to store energy. The thin wire 35 is loosened. When the driving slope 33 end of the limit block 32 is opposite to the arc-shaped groove 9, the limit block 32 is instantly inserted into the arc-shaped groove 9 under the reset action of the corresponding limit spring 34 and locks the limit block 32 in the swing groove. 18, the thin wire 35 is instantly tightened again, and the cooperation of the limit block 32 and the arc-shaped groove 9 prevents the closed door leaf 5 from being opened in the opposite direction.

The other two blocks 8 located at the same end of the rotating shaft 7 as the block 8 with the arc-shaped groove 9 are located outside the swing groove 18 at the same angle, and then swing the swing rod 14 in the direction of the corresponding U-shaped seat 15 on the door leaf 5. The rod 14 drives the corresponding rotating shaft 7 to rotate synchronously through the ring sleeve A13 hinged to it, and the rotating shaft 7 drives the corresponding eight clamping blocks 8 to rotate synchronously. The two clamping blocks 8 entering the two pendulum slots 18 of the fixed block 16 move to the pendulum block 21 on the outer side of the pendulum slot 18 , and the limit block 32 located in the arc-shaped groove 9 does not have any effect on the clamping block 8 with the swing of the rotating shaft 7 . form an obstacle. During the movement of the clamping block 8 with the arc-shaped groove 9 toward the pendulum block 21 , the limiting block 32 is always in its initial state, and the two clamping blocks 8 located outside the pendulum groove 18 move toward the inner direction of the pendulum groove 18 .

During the swinging process of the swing rod 14 to the corresponding U-shaped seat 15 , manually swing the swing rod 14 upward at a certain angle around its hinge point with the ring sleeve A13 to ensure that the U-shaped seat 15 is swung to the state parallel to the door leaf 5 when the swing rod 14 swings It suffices not to interfere with the pendulum rod 14 .

When the swing rod 14 is swung to a state parallel to the door leaf 5 , the swing rod 14 is positioned above the U-shaped seat 15 over the U-shaped seat 15 . One end of the block 21 interacts with each other, and the pendulum block 21, which is restricted by the self-locking function of the cooperating screw 27 and the inner threaded sleeve 29 and remains in a static state, restricts the continued swinging of the two clamping blocks 8 swinging out of the pendulum groove 18, thereby preventing The opening of the door leaf 5 completes the preliminary locking of the closed door leaf 5 . The two clamping blocks 8 originally located in the swing groove 18 are located on both sides of the corresponding positioning block 20, and the other two clamping blocks 8 are also located on both sides of the corresponding positioning block 20, and play a certain positioning role for the position of the rotating shaft 7 in the rotating groove 17. . Next, swing the swing rod 14 downward into the U-shaped seat 15 to limit the rotation of the rotating shaft 7 , and then complete the complete locking of the closing door.

When the fully locked door leaf 5 needs to be opened, the swing rod 14 is swung upward at an appropriate angle, so that the swing rod 14 just swings out of the U-shaped seat 15 . Then, the rotating shaft 7 is driven to rotate 90 degrees in the opposite direction by the pendulum rod 14, the two leaf springs 12 deform and store energy, and the four clamping blocks 8 that the rotating shaft 7 cooperates with the pendulum block 21 and the limit block 32 are separated from the corresponding pendulum block 21 and the limit block respectively. The limitation of block 32, the door leaf 5 can be opened at this time. In the process of reversely rotating the shaft 7 , the pendulum rod 14 is manually swung down to a horizontal state to complete the reset of the pendulum rod 14 relative to the rotation shaft 7 .

During the process of loading and unloading goods in the cargo box 1 by the worker, the door leaf 5 may be closed under the action of wind force or under the action of intentional human action, and the worker is locked in the cargo box 1 . If the door leaf 5 is closed under the action of wind, the clamping block 8 with the arc-shaped groove 9 on the rotating shaft 7 is inserted into the swing groove 18 on the corresponding fixing block 16 at an angle of 45 degrees, and the limit block 32 in the swing groove 18 is instantly completed. Insertion into the arc-shaped slot 9 on the corresponding block 8 will automatically lock the door leaf 5 which is closed under the action of the wind. If the door leaf 5 is intentionally closed, after the door leaf 5 is closed, the swing rod 14 will be artificially inserted into the U-shaped seat 15, the block 8 with the arc-shaped groove 9 and the block 8 with the arc-shaped groove 9 The locking blocks 8 in an axially distributed state cooperate with the swing blocks 21 to completely lock the closed door leaf 5 .

At this time, the worker locked in the cargo box 1 can rotate the two torsion wheels 30 corresponding to the corresponding door leaves 5 in the top and bottom transmission grooves 3 of the cargo box 1 in turn, and the two torsion wheels 30 respectively drive the corresponding screws 27 to synchronize When rotated, the screw 27 and the corresponding circular sleeve 25 rotate relative to each other. The screw 27 pulls the corresponding sliding rod 23 to shrink into the corresponding chute A4 through the corresponding circular sleeve 25 under the action of the corresponding inner thread sleeve 29. The restriction of each block 8 is gradually released, and the pendulum pin performs adaptive sliding in the chute C22 on the pendulum block 21 . At the same time, the swing of the pendulum block 21 pulls the corresponding limit block 32 through the corresponding thin wire 35 to shrink into the sliding groove B19 on the inner wall of the corresponding pendulum groove 18 to release the block 8 with the arc groove 9 at an angle of 45 degrees. Its insertion into the pendulum groove 18 restricts the movement in the opposite direction.

When the restriction of the two clamping blocks 8 by the pendulum block 21 is completely released, the restriction block 32 also completely releases the restriction on the opposite direction movement of the clamping block 8 with the arc-shaped groove 9 into the pendulum groove 18 at an angle of 45 degrees. , so that no matter whether the door leaf 5 is closed by itself under the action of wind or intentionally closed, any form of restriction on the block 8 is completely lifted. At this time, the door leaf 5 is pushed outward from the cargo compartment 5 can be opened to avoid the porter being locked in the cargo box 1 and reducing the efficiency of continuing to carry the goods, and avoiding unnecessary trouble caused by the porter being locked in the cargo box 1 .

The self-locking of the door leaf 5 after being closed under the action of wind ensures that when the truck driver forgets to check the closed state of the door leaf 5 and drives on the road, the door leaf 5 will not switch and swing due to driving bumps, so as to prevent the goods in the car from forgetting to close. The door leaf 5 is dropped and the loss of cargo transportation is reduced. At the same time, the collision to pedestrians or vehicles caused by the swinging of the unlocked door leaf 5 due to bumpy driving is avoided, and the potential safety hazard is reduced.

When the door leaf 5 is opened from the cargo compartment 1, the two torsion wheels 30 corresponding to the opened door leaf 5 are reversely rotated, and the two torsion wheels 30 drive the two pendulum blocks 21 to reset through a series of The limit blocks 32 are reset under the reset action of the corresponding limit springs 34 respectively, and the two thin wires 35 are always in a tight state.

To sum up, the beneficial effects of the present invention are as follows: the present invention realizes the protection of goods that are closed by themselves under the action of wind through the cooperation of the limiting block 32 and the arc-shaped grooves 9 on the two same-side clamping blocks 8 on the rotating shaft 7 The door leaf 5 of compartment 1 is locked to avoid the reciprocating switch swing of the two door leaves 5 of cargo compartment 1 due to road bumps when the driver drives on the road without checking whether the door leaf 5 of cargo compartment 1 is closed. The goods will not be damaged due to bumps on the road, reducing the economic loss of freight.

When the worker is carrying the goods, if the door leaf 5 is closed by itself under the action of the wind and the porter is locked inside the cargo box, the porter locked into the cargo box 1 can rotate the two knobs on the upper and lower ends of the same door leaf 5 , the knob drives the limit block 32 to retract through a series of transmissions and unlocks the closed door leaf 5. The porter can open the locked door leaf 5 from the inside of the cargo compartment 1, thereby reducing the impact of the porter's handling of goods due to the door leaf 5 being closed by itself. A lot of troubles are caused, and the delay of cargo handling caused by the porter being locked into the cargo compartment 1 can be effectively avoided.

Claims (5)

1. The utility model provides a van rear door lock mechanism which characterized in that: the rear door comprises a cargo compartment, door leaves, rotating shafts, clamping blocks, leaf springs, swing rods, U-shaped seats, fixing blocks, positioning blocks, swing blocks, sliding rods, sliding pins, round sleeves, screws, internal thread sleeves, torsion wheels, limiting blocks, limiting springs and thin steel wires, wherein two vertical rotating shafts are symmetrically arranged on the two door leaves of the rear door of the cargo compartment, and each rotating shaft is in rotating fit with three supports arranged on the door leaves; each rotating shaft is connected with a corresponding door leaf through a leaf spring for rotationally resetting the rotating shaft; two ends of each rotating shaft are respectively provided with two clamping blocks at intervals along the axial direction; four fixed blocks which correspond to two ends of the two rotating shafts one by one are arranged on the end surface of the rear door of the cargo compartment, and a positioning block is arranged on each fixed block; each positioning block is hinged with a swinging block, one end of each swinging block is matched with the two clamping blocks at one end of the corresponding rotating shaft;

one end of the swinging block, which is not matched with the clamping block, is hinged with a sliding rod sliding in the sliding groove A on the cargo compartment through a sliding pin parallel to the rotating shaft; the sliding pin is arranged at one end of the sliding rod and slides in the sliding groove C on the swinging block; the tail end of each sliding rod is provided with a round sleeve with the same central axis, and the round sleeve is positioned in a transmission groove on the inner wall of the cargo compartment; the screw rod which is screwed with the internal thread sleeve arranged in the transmission groove is rotationally matched with the round sleeve; the tail end of the screw rod is provided with a manually-rotated torsion wheel; each fixed block is slidably matched with a limit block matched with the arc-shaped groove on the corresponding fixture block along the direction parallel to the central axis of the rotating shaft, and a limit spring for resetting the limit block is nested on the limit block; the limiting block is provided with a driving inclined plane matched with the clamping block; one end of the swinging block, which is matched with the two corresponding clamping blocks, drives the corresponding limiting block to move through the thin steel wire; each rotating shaft is hinged with a swing rod which swings in the vertical direction; the swing rod is matched with a U-shaped seat arranged on a corresponding door leaf so as to limit the rotation of the rotating shaft.

2. The rear door lock mechanism of a van according to claim 1, wherein: a loop A is fixedly embedded on each rotating shaft, and one end of the oscillating bar is hinged between the two support lugs on the corresponding loop A; the door leaf is hinged at the rear door of the cargo compartment through a hinge; the swing block is H-shaped, the positioning block on the fixing block is hinged between the two branches at one end of the swing block, and one end of the sliding rod is hinged between the two branches at the end of the swing block which is not matched with the clamping block.

3. The rear door lock mechanism of a van according to claim 1, wherein: each rotating shaft is provided with a fixed plate, and the fixed plate is connected with the corresponding door leaf through a plate spring; the screw rod is provided with a ring sleeve B which rotates in a ring groove on the inner wall of the corresponding round sleeve.

4. The rear door lock mechanism of a van according to claim 1, wherein: the fixed block is provided with a rotating groove matched with one end of the corresponding rotating shaft, and the inner wall of the rotating groove is provided with two swinging grooves respectively matched with the two clamping blocks; four clamping blocks are symmetrically arranged on the rotating shaft, and two clamping blocks which are not matched with the corresponding swinging block are matched with the other positioning block arranged on the fixing block; the limiting block slides in a sliding groove B on the inner wall of the swinging groove; the thin steel wire is connected with a fixed rod arranged on the swinging block; the guide ring is installed through the fixing base on the fixed block, and the thin steel wire passes the guide ring.

5. The rear door lock mechanism of a van according to claim 1, wherein: the rim of the twisting wheel is provided with anti-skid insections.

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