CN113309424A - Rear door lock mechanism for van - Google Patents

Abstract

The invention belongs to the field of rear door lock mechanisms of van trucks, and particularly relates to a rear door lock mechanism for a van truck, which comprises a cargo compartment, door leaves, rotating shafts, clamping blocks, fixed blocks, positioning blocks, swinging blocks, a sliding groove C, a sliding rod, a sliding pin, a round sleeve, a limiting block, a limiting spring and the like, wherein two vertical rotating shafts are symmetrically arranged on the two door leaves of a rear door of the cargo compartment, and each rotating shaft is in rotating fit with three supports arranged on the door leaves; the invention realizes the locking of the door leaves of the cargo compartment which is automatically closed under the action of wind power by the matching of the limiting blocks and the arc-shaped grooves on the two clamping blocks at the same side on the rotating shaft, and avoids the reciprocating switch swing of the two door leaves of the cargo compartment caused by road bumping under the condition that a driver drives the vehicle to go on the road without checking whether the door leaves of the cargo compartment are closed, thereby effectively preventing the goods in the cargo compartment from dropping and damaging due to the dropping and bumping of the road surface, and reducing the economic loss of freight transportation.

Description

Rear door lock mechanism for van

Technical Field

The invention belongs to the field of rear door lock mechanisms of van trucks, and particularly relates to a rear door lock mechanism for a van truck.

Background

When the rear door of the existing van without the rear door self-locking function is closed by strong wind or unintentional people after the van is loaded, the closed rear door is not locked, and a driver of the van forgets to check whether the rear door of the cargo compartment is closed or not when the driver gets on the van to drive and get on the way. When the cargo in the cargo compartment encounters a bumpy road surface, the cargo is likely to fall off the rear door due to bumping, and therefore loss is caused. Meanwhile, the cargo compartment door leaf which swings due to jolting and opens causes certain threat to the safety of pedestrians or other vehicles, and the cargo compartment door leaf has great potential safety hazard.

In the case of a van having a self-locking function of a rear door of a cargo compartment, when a carrier entering the cargo compartment stacks cargo in the cargo compartment, a door leaf of the rear door of the cargo compartment is automatically closed and locked by wind power, resulting in the carrier being closed in the compartment. If the work of loading and unloading goods is all undertaken by a driver alone, the driver who is locked in the carriage by the lock can not get the help of others in time and come out this moment, will influence the loading and unloading of goods and transport in time certainly.

In order to solve the problems of the two types of van vehicles, it is necessary to design a van vehicle rear door lock mechanism which can be unlocked from the cargo compartment and has a self-locking function.

The invention designs a rear door lock mechanism for a van truck to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a rear door lock mechanism for a van, which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

A rear door lock mechanism for a van truck comprises a cargo compartment, door leaves, rotating shafts, clamping blocks, leaf springs, a swinging rod, a U-shaped seat, a fixing block, a positioning block, a swinging block, a sliding chute C, a sliding rod, a sliding pin, a round sleeve, a screw, an internal thread sleeve, a torsion wheel, a limiting block, a limiting spring and a thin steel wire, wherein two vertical rotating shafts are symmetrically arranged on the two door leaves of a rear door of the cargo compartment, and each rotating shaft is in rotating fit with three supporting seats 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 which is matched with 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 matched with the two corresponding clamping blocks drives the corresponding limiting block to move through the thin steel wire. The limiting block is provided with a driving inclined plane matched with the clamping block, the driving inclined plane ensures that the clamping block with the arc-shaped groove interacts with the limiting block when the door leaf is automatically closed and completes automatic locking of the door leaf, and one end of the swinging block matched with the corresponding clamping block 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.

As a further improvement of the technology, a loop A is fixedly embedded in each rotating shaft, and one end of the oscillating bar is hinged between 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.

As a further improvement of the technology, each rotating shaft is provided with a fixed plate which 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.

As a further improvement of the technology, 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. The rotating groove provides effective positioning for one end of a rotating shaft on the door leaf in a closed state, and the swinging groove provides a moving space for the fixture block to rotate along with the rotating shaft. Four clamping blocks are symmetrically arranged on the rotating shaft, two clamping blocks which are not matched with the corresponding swing blocks are matched with the other positioning block arranged on the fixing block, and the rotating shaft on the closed and locked door leaf is effectively positioned by the two positioning blocks through matching with the four clamping blocks. 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. The guide ring guides the thin steel wire to effectively pull the corresponding limiting block in the movement direction of the limiting block, and the acting force of the swing block on the limiting block through the thin steel wire is guaranteed to be completely used for pulling the limiting block to move, so that the swing block can pull the limiting block to move smoothly through the thin steel wire.

As a further improvement of the technology, the rim of the torsion wheel is provided with anti-skid insections.

Compared with the traditional van rear door lock mechanism, the goods van door leaf automatically closed under the action of wind power is locked by the aid of the limiting blocks and the arc-shaped grooves in the two same-side clamping blocks on the rotating shaft, reciprocating switch swing of the two door leaves of the goods van due to road bumping is avoided under the condition that a driver drives the car to go on the road without checking whether the goods van door leaf is closed, accordingly, goods in the goods van are effectively prevented from dropping and bumping due to the road surface, falling and damage are avoided, and economic loss of freight is reduced.

When a worker carries goods, if the door leaf is automatically closed under the action of wind power and the carrier is reversely locked in a container, the carrier reversely locked in the cargo compartment can rotate the two knobs at the upper end and the lower end of the same door leaf, the knobs drive the limiting blocks to retract through a series of transmission to unlock the closed door leaf, and the carrier can automatically open the reversely locked door leaf from the inside of the cargo compartment, so that a plurality of troubles caused by the fact that the door leaf is automatically closed when the carrier carries the goods are reduced, and the delay of carrying the goods caused by the fact that the carrier is reversely locked in the cargo compartment is effectively avoided.

The invention has simple structure and better use effect.

Drawings

Fig. 1 is an overall schematic view of the present invention.

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

FIG. 3 is a schematic cross-sectional view of the fixing block, the positioning block, the H-shaped swing block, the sliding pin, the sliding rod, the round sleeve, the screw, the internal thread sleeve and the torsion wheel.

FIG. 4 is a schematic cross-sectional view of the slide rod, the slide pin, the H-shaped swing block, the fixture block and the rotation shaft.

Fig. 5 is a schematic cross-sectional view of two viewing angles of the H-shaped swing block, the fixture block and the limiting block.

FIG. 6 is a schematic view of the rotation shaft, the ring sleeve A, the swing rod and the U-shaped seat.

Fig. 7 is a schematic view of an H-shaped pendulum block.

Fig. 8 is a schematic view of the fixed block and the positioning block.

Fig. 9 is a schematic view of the engagement between the rotating shaft and the latch and a partial view thereof.

Fig. 10 is a schematic view of a cargo box and a partial section thereof.

Fig. 11 is a schematic view of the combination of the rotating shaft, the fixing plate, the plate spring and the door leaf.

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

Number designation in the figures: 1. a cargo compartment; 2. a rear door; 3. a transmission groove; 4. a chute A; 5. a door leaf; 6. a hinge; 7. a rotating shaft; 8. a clamping block; 9. an arc-shaped slot; 10. a support; 11. a fixing plate; 12. a plate spring; 13. a ring sleeve A; 14. a swing rod; 15. a U-shaped seat; 16. a fixed block; 17. a rotating tank; 18. a swinging groove; 19. a chute B; 20. positioning blocks; 21. swinging a block; 22. a chute C; 23. a slide bar; 24. a slide pin; 25. a round sleeve; 26. a ring groove; 27. a screw; 28. a ring sleeve B; 29. an internal thread sleeve; 30. a torsion wheel; 31. anti-skid insections; 32. a limiting block; 33. a drive ramp; 34. a limiting spring; 35. thin steel wires; 36. fixing the rod; 37. a guide ring; 38. a fixed seat.

Detailed Description

The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 1, 2 and 3, the rear door 2 of the cargo compartment 1 comprises a cargo compartment 1, door leaves 5, rotating shafts 7, a clamping block 8, a leaf spring 12, a swing rod 14, a U-shaped seat 15, a fixing block 16, a positioning block 20, a swing block 21, a sliding chute C22, a sliding rod 23, a sliding pin 24, a round sleeve 25, a screw 27, an internal thread sleeve 29, a torsion wheel 30, a limiting block 32, a limiting spring 34 and a thin steel wire 35, wherein as shown in fig. 1, two vertical rotating shafts 7 are symmetrically installed on two door leaves 5 of the rear door 2 of the cargo compartment 1, and each rotating shaft 7 is in rotating fit with three supports 10 installed on the door leaves 5; as shown in fig. 1 and 11, each rotating shaft 7 is connected to the corresponding door leaf 5 by a leaf spring 12 that resets its rotation; as shown in fig. 2, 4 and 9, two ends of each rotating shaft 7 are respectively provided with two clamping blocks 8 at intervals along the axial direction; as shown in fig. 1, 2 and 8, four fixing blocks 16 corresponding to two ends of two rotating shafts 7 one by one are arranged on the end surface of a rear door 2 of a cargo compartment 1, and a positioning block 20 is arranged on each fixing block 16; as shown in fig. 2, 3 and 4, each positioning block 20 is hinged with a swinging block 21, one end of which is matched with two fixture blocks 8 at one end of the corresponding rotating shaft 7.

As shown in fig. 4, 5 and 7, one end of the swing block 21 not matched with the clamping block 8 is hinged with a sliding rod 23 sliding in a sliding groove a4 on the cargo compartment 1 through a sliding pin 24 parallel to the rotating shaft 7; the sliding pin 24 is arranged at one end of the sliding rod 23, and the sliding pin 24 slides in the sliding groove C22 on the swinging block 21; as shown in fig. 3 and 10, a round sleeve 25 with the same central axis is arranged at the tail end of each sliding rod 23, and the round sleeve 25 is positioned in the transmission groove 3 on the inner wall of the cargo compartment 1; the screw 27 screwed with the internal thread sleeve 29 arranged in the transmission groove 3 is matched with the round sleeve 25 in a rotating way; a manually-rotated torsion wheel 30 is arranged at the tail end of the screw 27; as shown in fig. 5 and 9, each fixing block 16 is slidably fitted with a limiting block 32 fitted with the arc-shaped groove 9 of the corresponding fixing block 8 along a direction parallel to the central axis of the rotating shaft 7, and a limiting spring 34 for resetting the limiting block 32 is nested on the limiting block 32; the limiting block 32 is provided with a driving inclined plane 33 matched with the fixture block 8; one end of the swinging block 21, which is matched with the two corresponding clamping blocks 8, drives the corresponding limiting block 32 to move through the thin steel wire 35. The limiting block 32 is provided with a driving inclined plane 33 matched with the clamping block 8, the driving inclined plane 33 ensures that the clamping block 8 with the arc-shaped groove 9 interacts with the limiting block 32 when the door leaf 5 is automatically closed and completes automatic locking of the door leaf 5, and one end of the swing block 21 matched with the corresponding clamping block 8 drives the corresponding limiting block 32 to move through the thin steel wire 35. As shown in fig. 1 and 6, each rotating shaft 7 is hinged with a swing rod 14 which swings in the vertical direction; the oscillating bar 14 cooperates with a U-shaped seat 15 mounted on the respective door leaf 5 to perform the limitation of the rotation of the shaft 7.

As shown in fig. 6, a ring sleeve a13 is fixedly embedded in each rotating shaft 7, and one end of the swing rod 14 is hinged between two support lugs on the corresponding ring sleeve a 13; as shown in fig. 1, the door leaf 5 is hinged to the rear door 2 of the cargo compartment 1 through a hinge 6; as shown in fig. 2, 3 and 7, the swinging block 21 is H-shaped, the positioning block 20 on the fixed block 16 is hinged between two branches at one end of the swinging block 21, and one end of the sliding rod 23 is hinged between two branches at one end of the swinging block 21 which is not matched with the clamping block 8.

As shown in fig. 11, each of the rotating shafts 7 is provided with a fixing plate 11, and the fixing plate 11 is connected with the corresponding door leaf 5 through a leaf spring 12; as shown in fig. 3 and 12, the screw 27 is provided with a ring B28, and the ring B28 rotates in the ring groove 26 on the inner wall of the corresponding round sleeve 25.

As shown in fig. 3, 5 and 8, the fixing block 16 is provided with a rotating groove 17 engaged with one end of the corresponding rotating shaft 7, and the inner wall of the rotating groove 17 is provided with two swing grooves 18 engaged with the two fixing blocks 8. The rotating groove 17 provides effective positioning for one end of the rotating shaft 7 on the door leaf 5 in the closed state, and the swinging groove 18 provides a moving space for the fixture block 8 to rotate along with the rotating shaft 7. As shown in fig. 4 and 9, four locking blocks 8 are symmetrically installed on the rotating shaft 7, two locking blocks 8 that do not cooperate with corresponding swing blocks 21 cooperate with another locking block 20 installed on the fixed block 16, and the two locking blocks 20 cooperate with the four locking blocks 8 to effectively position the rotating shaft 7 on the closed and locked door leaf 5. As shown in fig. 5 and 8, the limiting block 32 slides in the sliding groove B19 on the inner wall of the swinging groove 18; the thin steel wire 35 is connected with a fixed rod 36 arranged on the swinging block 21; the fixing block 16 is provided with a guide ring 37 through a fixing seat 38, and the thin steel wire 35 passes through the guide ring 37. The guide ring 37 guides the thin steel wire 35 to effectively pull the corresponding limiting block 32 in the movement direction of the limiting block 32, so that the acting force of the swing block 21 on the limiting block 32 through the thin steel wire 35 is completely used for pulling the limiting block 32 to move, and the swing block 21 can pull the limiting block 32 to move smoothly through the thin steel wire 35.

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

The working process of the invention is as follows: the opening state of the door leaf 5 is taken as an initial state, in the initial state, the two plate 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 fixture block 8 form an included angle of about 45 degrees with the corresponding door leaf 5. The swing block 21 is in a state of restricting the swing of the latch 8 in the swing groove 18 of the corresponding fixed block 16. The driving inclined plane 33 end of the limiting block 32 is positioned in the corresponding swing groove 18 under the action of the corresponding limiting spring 34, and the thin steel wire 35 is in a tightening state. The retaining springs 34 are all in a compressed state. The pendulum mass 21 remains stationary under the self-locking function of the respective threaded rod 27 and the female threaded sleeve 29, which cooperate with each other.

When the door 5 needs to be closed and the closed state of the door 5 needs to be locked, the door 5 is manually closed toward the cargo box 1 and the rear door 2 is manually closed. After the door leaf 5 is completely closed, two ends of a rotating shaft 7 on the door leaf 5 just respectively and simultaneously enter a rotating groove 17 on a corresponding fixed block 16, a fixture block 8 with an arc-shaped groove 9 on each end of the rotating shaft 7 and another fixture block 8 with the arc-shaped groove 9, wherein the fixture block 8 is axially distributed along the rotating shaft 7, are simultaneously and respectively inserted into two swing grooves 18 on the corresponding fixed block 16 at an angle of 45 degrees, and a limiting block 32 on the inner wall of each swing groove 18 enters the arc-shaped groove 9 on the corresponding fixture block 8 and limits the movement of the fixture block 8 out of the swing grooves 18, so that the door leaf 5 is locked by being reversely opened.

During the process that the fixture block 8 enters the swing groove 18, the fixture block 8 interacts with the driving inclined plane 33 on the limiting block 32, so that the limiting block 32 contracts towards the corresponding sliding groove B19, the limiting spring 34 is further compressed to store energy, and the thin steel wire 35 is loosened. When the driving inclined plane 33 end of the limiting block 32 is opposite to the arc-shaped groove 9, the limiting block 32 is instantly inserted into the arc-shaped groove 9 under the reset action of the corresponding limiting spring 34 and locks the limiting block 32 in the swing groove 18, the thin steel wire 35 is instantly tightened again, and the limiting block 32 is matched with the arc-shaped groove 9 to prevent the reverse opening of the closing door leaf 5.

The other two fixture blocks 8 which are positioned at the same end of the rotating shaft 7 with the fixture block 8 with the arc-shaped groove 9 are positioned outside the swing groove 18 at the same angle, then the swing rod 14 is held by hand to swing towards the corresponding U-shaped seat 15 on the door leaf 5, the swing rod 14 drives the corresponding rotating shaft 7 to synchronously rotate through a ring sleeve A13 hinged with the swing rod, and the rotating shaft 7 drives the corresponding eight fixture blocks 8 to synchronously rotate. The two fixture blocks 8 entering the two swing grooves 18 of the fixing block 16 move towards the swing block 21 at one side outside the swing groove 18, and the limiting block 32 positioned in the arc-shaped groove 9 does not form a barrier to the swing of the fixture blocks 8 along with the rotating shaft 7. In the process of moving the fixture block 8 with the arc-shaped groove 9 towards the swing block 21, the limiting block 32 is always in the initial state, and the two fixture blocks 8 positioned outside the swing groove 18 move towards the direction inside the swing groove 18.

In the process that the swing rod 14 swings towards the corresponding U-shaped seat 15, the swing rod 14 is manually swung upwards by a certain angle around a hinge point of the swing rod and the ring sleeve A13, and the U-shaped seat 15 does not interfere with the swing rod 14 when the swing rod 14 swings to be parallel to the door leaf 5.

When the swing rod 14 swings to a state parallel to the door leaf 5, the swing rod 14 crosses the U-shaped seat 15 and is positioned above the U-shaped seat 15, the two fixture blocks 8 originally positioned in the swing groove 18 swing out of the swing groove 18 and are just interacted with one end of the swing block 21, the swing block 21 which is kept in a static state is limited by the self-locking function of the screw 27 and the internal thread sleeve 29 which are matched with each other, and the continuous swinging of the two fixture blocks 8 which swing out of the swing groove 18 is limited, so that the door leaf 5 is prevented from being opened, and the primary locking of the closed door leaf 5 is completed. Two clamping blocks 8 originally positioned in the swing groove 18 are positioned at two sides of the corresponding positioning block 20, and the other two clamping blocks 8 are also positioned at two sides of the corresponding positioning block 20, so that a certain positioning effect is exerted on the position of the rotating shaft 7 in the rotating groove 17. Then, the swing link 14 is swung downwards into the U-shaped seat 15 to complete the rotation limitation of the rotating shaft 7, and further 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 upwards by a proper angle, so that the swing rod 14 just swings out of the U-shaped seat 15. Then, the swing rod 14 drives the rotating shaft 7 to rotate 90 degrees in the reverse direction, the two plate springs 12 are deformed to store energy, the four fixture blocks 8 of the rotating shaft 7, the swing block 21 and the limiting block 32 are respectively separated from the corresponding limit of the swing block 21 and the limiting block 32, and the door leaf 5 is opened at the moment. In the process of reversing the rotating shaft 7, the swing rod 14 is manually swung down to a horizontal state to complete the resetting of the swing rod 14 relative to the rotating shaft 7.

During the loading and unloading of the cargo in the cargo compartment 1 by the worker, the door leaf 5 may be closed by the wind or by an intentional human action, locking the worker in the cargo compartment 1. If the door leaf 5 is closed under the action of wind power, the fixture 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 limiting block 32 in the swing groove 18 instantly completes the insertion into the arc-shaped groove 9 on the corresponding fixture block 8 and automatically locks the door leaf 5 closed under the action of wind power. If the door leaf 5 is intentionally and manually closed, after the door leaf 5 is closed, the swing rod 14 is manually inserted into the U-shaped seat 15, and the fixture block 8 with the arc-shaped groove 9 and the fixture block 8 which is axially distributed with the fixture block 8 with the arc-shaped groove 9 are simultaneously matched with the swing block 21 to completely lock the closed door leaf 5.

At this time, the worker locked in the cargo box 1 can sequentially rotate the two torsion wheels 30 corresponding to the corresponding door leaves 5 in the top and bottom transmission grooves 3 in the cargo box 1, the two torsion wheels 30 respectively drive the corresponding screw rods 27 to synchronously rotate, and the screw rods 27 and the corresponding round sleeves 25 relatively rotate. The screw 27 pulls the corresponding slide rod 23 to retract into the corresponding slide groove A4 through the corresponding round sleeve 25 under the action of the corresponding internal thread sleeve 29, the slide rod 23 drives the corresponding swing block 21 to swing through the slide pin 24, the swing block 21 gradually releases the limitation on the corresponding two fixture blocks 8, and the swing pin performs self-adaptive sliding in the slide groove C22 on the swing block 21. At the same time, the swing of the swing block 21 pulls the corresponding limit block 32 to retract into the sliding groove B19 on the inner wall of the corresponding swing groove 18 through the corresponding thin steel wire 35 to release the limitation of the movement of the latch 8 having the arc-shaped groove 9 in the direction opposite to the insertion direction into the swing groove 18 at an angle of 45 degrees.

When the limit of the swing block 21 on the two fixture blocks 8 is completely released, the limit of the limit block 32 on the fixture block 8 with the arc-shaped groove 9 in the opposite direction of the insertion into the swing groove 18 at an angle of 45 degrees is also completely released, so that no matter the door leaf 5 is automatically closed under the action of wind or intentionally and artificially closed at the moment, the limit of any form on the fixture block 8 is completely released, and at the moment, the door leaf 5 is pushed outwards from the cargo compartment 1, the door leaf 5 can be opened, the efficiency of continuous cargo transportation caused by the fact that a carrier is locked in the cargo compartment 1 in a back locking manner is avoided, and meanwhile, unnecessary troubles caused by the fact that the carrier is locked in the cargo compartment 1 in a back locking manner are avoided.

The door leaf 5 is the auto-lock after closing under the wind-force effect, guarantees that the door leaf 5 can not take place the switch swing because of the driving jolts under the condition that the driver of freight train forgets to check the closed condition of door leaf 5 and just goes on the road, avoids the goods in the car to take place to drop because of forgetting to close door leaf 5, reduces freight's loss. Meanwhile, the collision injury to pedestrians or vehicles caused by swinging of the unlocked door leaf 5 due to bumping during running is avoided, and potential safety hazards are reduced.

After 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, the two torsion wheels 30 respectively drive the two swing blocks 21 to reset through a series of transmission, the two limit blocks 32 respectively reset under the reset action of the corresponding limit springs 34, and the two thin steel wires 35 are always in a tightening state.

In conclusion, the beneficial effects of the invention are as follows: according to the invention, the door leaves 5 of the cargo compartment 1 which are automatically closed under the action of wind power are locked by matching the limiting blocks 32 with the arc-shaped grooves 9 on the two same-side clamping blocks 8 on the rotating shaft 7, so that reciprocating switch swing caused by road bumping of the two door leaves 5 of the cargo compartment 1 is avoided under the condition that a driver drives the vehicle to go on the road without checking whether the door leaves 5 of the cargo compartment 1 are closed, thereby effectively preventing the goods in the cargo compartment 1 from dropping and damaging due to the form of road surface dropping and bumping, and reducing the economic loss of freight.

When a worker carries goods, if the door leaf 5 is automatically closed under the action of wind power to reversely lock a carrier in a container, the carrier reversely locked in the cargo compartment 1 can rotate the two knobs at the upper end and the lower end of the same door leaf 5, the knobs drive the limiting blocks 32 to retract through a series of transmission and unlock the closed door leaf 5, and the carrier can automatically open the reversely locked door leaf 5 from the inside of the cargo compartment 1, so that a plurality of troubles caused by the fact that the door leaf 5 is automatically closed when the carrier carries the goods are reduced, and the delay of goods carrying caused by the fact that the carrier is reversely locked in the cargo compartment 1 is effectively avoided.

Claims (1)

1. The utility model provides a back door lock mechanism that van-type freight train used which characterized in that: the goods van rear door comprises a goods van body, door leaves, rotating shafts, clamping blocks, leaf springs, oscillating rods, U-shaped seats, fixing blocks, positioning blocks, oscillating blocks, sliding chutes C, sliding rods, sliding pins, round sleeves, screw rods, 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 goods van body rear door, 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;

a loop A is fixedly embedded on each rotating shaft, and one end of the oscillating bar is hinged between 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 fixed block is hinged between two branches at one end of the swing block, and one end of the sliding rod is hinged between two branches at one end of the swing block which is not matched with the clamping block;

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.

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