CN111894372B

CN111894372B - Anti-collision van rear door lock device

Info

Publication number: CN111894372B
Application number: CN202010801008.3A
Authority: CN
Inventors: 刘娟; 商满梅; 程忆琴
Original assignee: Hangzhou Fuyang Xingjian Plastic Hardware Co Ltd
Current assignee: Hangzhou Dinghao New Material Co ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-08-27
Anticipated expiration: 2040-08-11
Also published as: CN113266219A; CN111894372A

Abstract

The invention belongs to the field of rear door locks of van trucks, and particularly relates to an anti-collision rear door lock device of a van truck, which comprises a shaft A, a shaft B, a limiting block A, a spring A, a thin steel wire A, a winding wheel, a swing rod, a U-shaped seat, a cross universal joint, a shaft C, a clamping block, a limiting block B, a spring B and the like, wherein two vertical hollow shafts A are symmetrically arranged on two door leaves of a rear door of a cargo compartment, and each shaft A is in rotating fit with two supports arranged on the door leaves; when the two shafts A deform due to collision and cannot be unlocked through the rotation of the swing rod, the swing rod is swung upwards to a large extent to drive the two limiting blocks A on the shafts A to remove the relative rotation limitation between the shafts A and the two corresponding shafts B, the four clamping blocks on the cylindrical head are driven to rotate and unlock through the shifting rod on the shifting shaft C, and therefore the door leaf of the cargo compartment can be opened smoothly under the condition that the shafts A deform due to collision.

Description

Anti-collision van rear door lock device

Technical Field

The invention belongs to the field of rear door locks of van trucks, and particularly relates to an anti-collision rear door lock device of a van truck.

Background

The existing van back door has two main problems, firstly, aiming at the van with the self-closing and self-locking failure of the van body back door, when the door leaf of the van body back door is automatically closed under the action of wind power and is not found by a driver or following the van, and the driver does not check the closing condition of the van body back door when starting driving, in the driving process of the van, the van body back door can be opened, closed and swung due to jolt. The swinging back door leaf threatens the safety of pedestrians or other vehicles on the one hand, and goods in the goods compartment can fall off from the back door in an open state due to bumping on the other hand, so that the loss of the goods is caused. Secondly, in a van having a self-locking function of a rear door of a cargo compartment, when a carrier loads and unloads cargo in the compartment, if a door leaf of the cargo compartment is automatically closed and locked under the action of wind, the carrier is locked back into the compartment, which causes unnecessary trouble.

In addition, when two rotating shafts in the rear door locking device of the existing van are deformed due to impact, the rotation of the rotating shafts is limited, so that the rear door locking device cannot be smoothly opened, and further the rear door of the cargo compartment cannot be normally and smoothly opened.

Therefore, it is necessary to design a rear door lock device for a crash-proof van to solve the above problems.

The invention designs an anti-collision van rear door lock device to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses an anti-collision van rear door lock device 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 device of an anti-collision van truck comprises a cargo compartment, door leaves, a shaft A, a shaft B, a limiting block A, a spring A, a thin steel wire A, a winding wheel, a ring sleeve A, a swing rod, a U-shaped seat, a leaf spring, a support, a cross universal joint, a shaft C, a cylindrical head, a clamping block, a fixing block, a positioning block, a swing block, a limiting block B, a spring B and a thin steel wire B, wherein two vertical hollow shafts A are symmetrically arranged on the two door leaves of a rear door of the cargo compartment, and each shaft A is in rotating fit with the two supports arranged on the door leaves; each shaft A is connected with a corresponding door leaf through a leaf spring for rotationally resetting the shaft A; two ends of the shaft A are respectively sleeved with a shaft B, each shaft B is connected with a shaft C with the same central axis through a cross universal joint, and the shaft C is rotationally matched with a support arranged on a door leaf; two sliding chutes B close to the two ends of the shaft A are respectively and radially provided with a limiting block A matched with the sliding chute C on the cylindrical surface of the shaft B at the corresponding end in a sliding manner; the limiting block A is nested with a spring A for resetting the limiting block A; the tail end of each shaft C is provided with a cylindrical head with the same central axis, and the cylindrical surface of each cylindrical head is provided with two clamping blocks at intervals along the axial direction; four fixed blocks which correspond to the cylindrical heads 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 the two clamping blocks on the corresponding cylindrical head.

The cargo compartment is provided with a structure for manually driving the swinging block to swing from the cargo compartment; all along being on a parallel with axle A the direction of the central axis sliding fit has with the stopper B of arc wall complex on the corresponding fixture block on every fixed block, the nested spring B who has reset to it that has on the stopper B. The limiting block B is provided with a driving inclined plane matched with the clamping block, and the driving inclined plane ensures that the clamping block with the arc-shaped groove interacts with the limiting block B when the door leaf is automatically closed and completes automatic locking of the door leaf. One end of the swinging block matched with the corresponding clamping block drives the corresponding limiting block B to move through the thin steel wire B.

A ring sleeve A is fixedly embedded on each shaft A, and each ring sleeve A 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 to limit the rotation of the shaft A; a winding wheel is arranged between the two support lugs on the outer side of the ring sleeve A, a shaft of the winding wheel is parallel to the swing rod and the hinge pin of the ring sleeve A, and the shaft of the winding wheel is in transmission connection with the swing rod and the hinge pin of the ring sleeve A; the winding wheel is wound with a thin steel wire A; one end of the thin steel wire A is respectively connected with the tail ends of the two limiting blocks A on the shaft A in a one-to-two mode so as to drive the two limiting blocks A to move synchronously.

As a further improvement of the technology, the door leaf is hinged at the rear door of the cargo compartment through a hinge; the swinging block is H-shaped, the positioning block on the fixed block is hinged between two branches at one end of the swinging block, and two branches at the other end of the swinging block are hinged with a sliding rod sliding in a sliding groove A on the cargo compartment through a sliding pin parallel to the shaft A; the sliding pin is arranged at one end of the sliding rod and slides in the sliding groove F 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.

As a further improvement of the technology, the screw is provided with a ring sleeve B which rotates in a ring groove on the inner wall of the corresponding round sleeve; the two shafts C positioned at the two ends of the shaft A are respectively provided with a deflector rod for manually driving the shaft C to rotate; two sliding chutes B on the shaft A are respectively provided with a transmission shell, and the limiting blocks A sliding in the sliding chutes B simultaneously slide in the sliding chutes D on the corresponding transmission shells; the spring A for resetting the limiting block A is positioned in the corresponding sliding groove D; each transmission shell is connected with the corresponding door leaf through a leaf spring; one end of the spring A is connected with the end face of the corresponding limiting block A, and the other end of the spring A is connected with the inner wall of the corresponding sliding groove D; the swing rod is hinged between the two support lugs on the ring sleeve A; the shaft A and the transmission shell are internally provided with a fixed pulley which guides the thin steel wire A to effectively pull the limiting block A to move.

As a further improvement of the technology, the fixed block is provided with a rotating groove matched with the corresponding cylindrical head, and the inner wall of the rotating groove is provided with two swinging grooves respectively matched with the two clamping blocks. The rotary groove provides effective positioning for the cylinder head on the door leaf in a closed state, and the swing groove provides a movable space for the fixture block to rotate along with the cylinder head. Four clamping blocks are symmetrically arranged on the cylindrical head, 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 cylindrical head 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 B slides in a sliding groove E on the inner wall of the swinging groove; the thin steel wire B 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 thin steel wire B passes the guide ring. The guide ring guides the thin steel wire B to effectively pull the corresponding limiting block B in the movement direction of the limiting block B, and the acting force of the swing block on the limiting block B through the thin steel wire B is guaranteed to be completely used for pulling the limiting block B to move, so that the swing block can pull the limiting block B to move smoothly through the thin steel wire B.

As a further improvement of the technology, a gear A is arranged on a hinge pin for hinging the swing rod and the support lug, and a gear B arranged on a shaft on which the winding wheel is arranged is meshed with the gear A.

As a further improvement of the technology, the transmission ratio of the gear A to the gear B is greater than 1, so that the speed of the swing rod for driving the winding wheel to wind the thin steel wire A through the gear A and the gear B is lower than the swinging speed of the swing rod, the swing rod can be enabled to upwards swing out of the U-shaped seat from the U-shaped seat, the winding wheel pulls the two limit blocks A on the shaft A to move by winding the thin steel wire A, the two limit blocks A which move in a smaller range still keep a limited state on the relative rotation of the two shafts B and the shaft A, and then the swing rod which swings in a smaller range drives the shaft A to rotate and releases the locking of the door leaf in a closed state.

Compared with the traditional van rear door lock device, the limit on the two corresponding clamping blocks is removed by driving the corresponding swing blocks through the rotating torsion wheel, meanwhile, the swing blocks drive the corresponding limiting blocks B to shrink towards the corresponding annular grooves E through the corresponding thin steel wires B, the door leaves which are closed and locked are unlocked and opened from the inside of the cargo compartment, and the situation that people carrying the cargo are locked in the cargo compartment reversely in the cargo carrying process to influence the continuous carrying of the cargo is avoided.

When the door leaf automatically closes a driver under the action of wind power and does not check the closing condition of the rear door of the cargo compartment, the automatically closed door leaf realizes self-locking, the door leaf is prevented from swinging due to the bumping of a road surface in the advancing process of a truck, and the loss caused by the falling of cargo in the cargo compartment due to the opening and closing swinging of the door leaf is prevented.

In addition, when the two shafts A deform due to collision and cannot be unlocked through the rotation of the swing rod, the swing rod is swung upwards to a large extent to drive the two limit blocks A on the shafts A to remove the relative rotation limitation between the shafts A and the two corresponding shafts B, the four clamping blocks on the cylindrical head are driven to rotate and unlock through the shifting rod on the shifting shaft C, and therefore the door leaf of the cargo compartment can still be smoothly opened under the condition that the shafts A deform due to collision. 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 positioning block, the swing block, the sliding pin, the sliding rod, the round sleeve, the screw and the torsion wheel.

Fig. 4 is a schematic section view of the fixing block, the swinging block, the fixing rod, the thin steel wire B, the limiting block B and the clamping block with the arc-shaped groove.

FIG. 5 is a schematic cross-sectional view of the swing block, the fixture block and the swing groove on the fixing block.

Fig. 6 is a schematic cross-sectional view of the shaft A, the ring A, the winding wheel, the gear B, the gear A and the swing link in cooperation and two views thereof.

Fig. 7 is a schematic view of a cargo compartment and a partial cross-section thereof.

FIG. 8 is a schematic cross-sectional view of the combination of shaft A, shaft B, universal joint cross, shaft C, cylindrical head and fixture block.

FIG. 9 is a schematic cross-sectional view of the shaft A, the shaft B, the limiting block A, the transmission shell and the thin steel wire A.

FIG. 10 is a schematic view of the engagement of the cylinder head and the latch.

FIG. 11 is a schematic view of a pendulum mass.

Fig. 12 is a schematic view of the fixed block and the positioning block.

Fig. 13 is a schematic view of axis a and its cross section.

Fig. 14 is a schematic view of axis B.

FIG. 15 is a schematic cross-sectional view of a drive housing.

Figure 16 is a schematic cross-sectional view of the round sleeve and its.

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. an axis A; 8. a chute B; 9. a shaft B; 10. a chute C; 11. a limiting block A; 12. a spring A; 13. a thin steel wire A; 14. a winding wheel; 15. a ring sleeve A; 16. supporting a lug; 17. a gear B; 18. a gear A; 19. a swing rod; 20. a U-shaped seat; 21. a fixed pulley; 22. a drive housing; 23. a chute D; 24. a plate spring; 25. a support; 26. a cross universal joint; 27. an axis C; 28. a deflector rod; 29. a cylindrical head; 30. a clamping block; 31. an arc-shaped slot; 32. a fixed block; 33. a rotating tank; 34. a swinging groove; 35. a chute E; 36. positioning blocks; 37. swinging a block; 38. a chute F; 39. a slide bar; 40. a slide pin; 41. a round sleeve; 42. a ring groove; 43. a ring sleeve B; 44. a screw; 45. an internal thread sleeve; 46. a torsion wheel; 47. a limiting block B; 48. a drive ramp; 49. a spring B; 50. a thin steel wire B; 51. fixing the rod; 52. a guide ring; 53. 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 4, it includes a cargo compartment 1, a door leaf 5, a shaft a7, a shaft B9, a limit block a11, a spring a12, a thin steel wire a13, a winding wheel 14, a ring sleeve a15, a swing link 19, a U-shaped seat 20, a leaf spring 24, a support 25, a universal joint cross 26, a shaft C27, a cylindrical head 29, a block 30, a fixed block 32, a positioning block 36, a swing block 37, a limit block B47, a spring B49 and a thin steel wire B50, wherein as shown in fig. 1, 2 and 13, two vertical hollow shafts a7 are symmetrically mounted on two door leaves 5 of a rear door 2 of the cargo compartment 1, and each shaft a7 is rotatably matched with two supports 25 mounted on the door leaves 5; each shaft a7 is connected to the respective door leaf 5 by means of a leaf spring 24 which resets its rotation; as shown in fig. 2, 3 and 8, two ends of the shaft a7 are respectively sleeved with a shaft B9, each shaft B9 is connected with a shaft C27 having the same central axis through a cross universal joint 26, and the shaft C27 is rotatably matched with a support 25 installed on the door leaf 5; as shown in fig. 9, 13 and 14, two sliding grooves B8 on the shaft a7 near two ends thereof are respectively and radially provided with a limiting block a11 matched with the sliding groove C10 on the cylindrical surface of the shaft B9 at the corresponding end in a sliding manner; a spring A12 for resetting the limiting block A11 is nested on the limiting block A11; as shown in fig. 8, the end of each shaft C27 is provided with a cylindrical head 29 having the same central axis, and two blocks 30 are mounted on the cylindrical surface of each cylindrical head 29 at intervals along the axial direction; as shown in fig. 1, 3 and 12, four fixing blocks 32 corresponding to the cylindrical heads 29 one by one are arranged on the end surface of the rear door 2 of the cargo compartment 1, and a positioning block 36 is arranged on each fixing block 32; each positioning block 36 is hinged with a swinging block 37, one end of which is matched with the two clamping blocks 30 on the corresponding cylindrical head 29.

As shown in fig. 3 and 7, the cargo box 1 is provided with a structure that the swinging block 37 is manually driven to swing from the cargo box 1; as shown in fig. 4 and 10, each fixing block 32 is slidably fitted with a stop B47 in a direction parallel to the central axis of the shaft a7, the stop B47 is fitted with the arc-shaped groove 31 of the corresponding block 30, and a spring B49 for returning the stop B47 is nested on the stop B47. The limiting block B47 has a driving inclined surface 48 engaged with the latch 30, and the driving inclined surface 48 ensures that the latch 30 having the arc-shaped groove 31 interacts with the limiting block B47 when the door leaf 5 is automatically closed and completes the automatic locking of the door leaf 5. One end of the swinging block 37, which is matched with the corresponding fixture block 30, drives the corresponding limit block B47 to move through a thin steel wire B50.

As shown in fig. 1 and 6, a ring sleeve a15 is fixedly embedded in each shaft a7, and each ring sleeve a15 is hinged with a swing rod 19 which swings in the vertical direction; the oscillating bar 19 cooperates with a U-shaped seat 20 mounted on the corresponding door leaf 5 to complete the limitation of the rotation of the axis a 7; a winding wheel 14 is arranged between the two support lugs 16 on the outer side of the ring sleeve A15, the shaft of the winding wheel 14 is parallel to the swing rod 19 and the hinge pin of the ring sleeve A15, and the shaft of the winding wheel 14 is in transmission connection with the hinge pin of the swing rod 19 and the ring sleeve A15; the winding wheel 14 is wound with a thin steel wire A13; as shown in fig. 6 and 9, one end of the thin steel wire a13 is connected to the ends of the two stoppers a11 on the shaft a7 in a halving manner, so as to drive the two stoppers a11 to move synchronously.

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. 3, 7 and 11, the swinging block 37 is H-shaped, the positioning block 36 on the fixed block 32 is hinged between two branches of one end of the swinging block 37, and two branches of the other end of the swinging block 37 are hinged with the sliding rod 39 sliding in the chute a4 on the cargo compartment 1 through the sliding pin 40 parallel to the shaft a 7; the sliding pin 40 is arranged at one end of the sliding rod 39, and the sliding pin 40 slides in the sliding groove F38 on the swinging block 37; the tail end of each sliding rod 39 is provided with a round sleeve 41 with the same central axis, and the round sleeve 41 is positioned in the transmission groove 3 on the inner wall of the cargo compartment 1; a screw 44 screwed with an internal thread sleeve 45 arranged in the transmission groove 3 is matched with the round sleeve 41 in a rotating way; a manually rotatable twist wheel 46 is mounted at the end of the screw 44.

As shown in fig. 3 and 16, the screw 44 is provided with a ring B43, and the ring B43 rotates in the ring groove 42 on the inner wall of the corresponding round sleeve 41; as shown in fig. 2 and 8, a shift lever 28 for manually driving the shaft C27 to rotate is mounted on each of two shafts C27 at two ends of the shaft a 7; as shown in fig. 1, 9 and 15, the driving housings 22 are mounted at two sliding grooves B8 on the shaft a7, and the limiting block a11 sliding in the sliding groove B8 slides in the sliding groove D23 on the corresponding driving housing 22; a spring A12 for resetting the limiting block A11 is positioned in the corresponding sliding groove D23; as shown in fig. 2, each transmission case 22 is connected to the corresponding door leaf 5 by a leaf spring 24; as shown in fig. 9, one end of the spring a12 is connected with the end face of the corresponding limit block a11, and the other end is connected with the inner wall of the corresponding sliding groove D23; as shown in fig. 6 and 9, the swing link 19 is hinged between the two lugs 16 on the loop a 15; the shaft A7 and the transmission case 22 are internally provided with a fixed pulley 21 which guides the thin steel wire A13 to effectively pull the limit block A11 to move.

As shown in fig. 5 and 12, the fixing block 32 is provided with a rotation groove 33 engaged with the corresponding cylinder head 29, and the inner wall of the rotation groove 33 is provided with two swing grooves 34 engaged with the two latch blocks 30. The rotation groove 33 provides an effective location for the cylinder head 29 on the door leaf 5 in the closed state, and the swing groove 34 provides a moving space for the latch 30 to rotate along with the cylinder head 29. As shown in fig. 5, 8 and 10, four locking blocks 30 are symmetrically installed on the cylindrical head 29, two locking blocks 30 not engaged with the corresponding swing block 37 are engaged with another positioning block 36 installed on the fixing block 32, and the two positioning blocks 36 are engaged with the four locking blocks 30 to effectively position the cylindrical head 29 on the closed and locked door 5. As shown in fig. 4 and 12, the limiting block B47 slides in the sliding groove E35 on the inner wall of the swinging groove 34; the thin steel wire B50 is connected with the fixed rod 51 arranged on the swinging block 37; the fixing block 32 is provided with a guide ring 52 through a fixing seat 53, and a thin steel wire B50 passes through the guide ring 52. The guide ring 52 guides the thin steel wire B50 to effectively pull the corresponding limit block B47 in the moving direction of the limit block B47, so that the acting force of the swing block 37 acting on the limit block B47 through the thin steel wire B50 is completely used for pulling the limit block B47 to move, and the swing block 37 pulls the limit block B47 through the thin steel wire B50 to move smoothly.

As shown in fig. 6, a gear a18 is mounted on the hinge pin where the swing link 19 is hinged with the lug 16, and a gear B17 mounted on the shaft of the winding wheel 14 is meshed with the gear a 18.

As shown in fig. 6, the transmission ratio of the gear a18 to the gear B17 is greater than 1, so that the speed of the swing link 19 driving the winding wheel 14 to wind the thin steel wire a13 through the gear a18 and the gear B17 is less than the swing speed of the swing link 19, when the swing link 19 swings upward from the U-shaped seat 20 by a small angle, the winding wheel 14 pulls the two stoppers a11 on the shaft a7 through the winding thin steel wire a13 to move by a small amplitude, the two stoppers a11 which move by a small amplitude still keep the limited state on the relative rotation of the two shafts B9 and a7, and the swing link 19 which swings by a small amplitude drives the shaft a7 to rotate and release the lock on the door leaf 5 in the closed state.

The fixture block 30, the cylindrical head 29, the swing rod 19, the ring sleeve A15 and the support lug 16 are all made of cast iron, so that the fixture block 30, the cylindrical head 29, the swing rod 19, the ring sleeve A15 and the support lug 16 are guaranteed not to deform under the condition of collision, the relative positions of the fixture block 30 and the cylindrical head 29 relative to the swing block 37 are further guaranteed not to change, the relative positions of the swing rod 19, the ring sleeve A15 and the support lug 16 are not changed, and therefore the two limit blocks A11 on the shaft A7 can be driven by the swing of the swing rod 19 relative to the ring sleeve A15 to remove the limitation of the relative rotation of the shaft A7 and the corresponding two shafts B9, the two shafts B9 are enabled to rotate automatically under the constraint of the swing shaft A7 under the condition that the shaft A7 deforms, and the fixture block 30 is driven by a series of transmission to reversely swing to unlock.

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 four leaf springs 24 are in a natural state, the swing rod 19 is perpendicular to the corresponding shaft A7 and is in a horizontal state, and the swing rod 19 and the fixture block 30 form an included angle of about 45 degrees with the corresponding door leaf 5. Two limit blocks A11 on the shaft A7 are simultaneously inserted into the sliding grooves C10 on the corresponding shaft B9 under the action of corresponding springs A12 respectively to limit the relative rotation between the shaft A7 and the corresponding two shafts B9. The thin steel wire a13 is in a taut state. The swing block 37 is in a state of restricting the swing of the latch 30 in the swing groove 34 of the corresponding fixed block 32. The driving inclined plane 48 end of the limiting block B47 is positioned in the corresponding swing groove 34 under the action of the corresponding spring B49, and the thin steel wire B50 is in a tightening state. Spring A12 and spring B49 are both in a compressed state. The pendulum mass 37 remains stationary under the self-locking function of the respective screw 44 and the female threaded sleeve 45, which cooperate with each other. The two levers 28 on the axis a7 are parallel to the rocker 19.

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, the two cylindrical heads 29 at two ends of the shaft a7 on the door leaf 5 just enter the rotating grooves 33 on the corresponding fixing blocks 32 respectively, the fixture block 30 with the arc-shaped groove 31 on each cylindrical head 29 and another fixture block 30 with the arc-shaped groove 31 and distributed along the axial direction of the cylindrical head 29 with the fixture block 30 are inserted into the two swing grooves 34 respectively at an angle of 45 degrees, the limiting block B47 on the inner wall of the swing groove 34 enters the arc-shaped groove 31 on the corresponding fixture block 30 and limits the movement of the fixture block 30 separating from the swing grooves 34, and further forms locking for the reverse opening of the door leaf 5.

During the process that the fixture block 30 enters the swing groove 34, the fixture block 30 interacts with the driving inclined surface 48 on the limit block B47, so that the limit block B47 contracts towards the corresponding sliding groove E35, the spring B49 is further compressed to store energy, and the thin steel wire B50 is loosened. When the driving inclined plane 48 end of the stopper B47 is opposite to the arc groove 31, the stopper B47 is instantly inserted into the arc groove 31 under the reset action of the corresponding spring B49 and locks the stopper B47 in the swing groove 34, the thin steel wire B50 is instantly tightened again, and the stopper is matched with the arc groove 31 to prevent the reverse opening of the closing door 5.

The other two fixture blocks 30 are positioned outside the swing groove 34 at the same angle, then the swing rod 19 is held by hand to swing towards the corresponding U-shaped seat 20 on the door leaf 5, the swing rod 19 drives the corresponding shaft A7 to synchronously rotate through a ring sleeve A15 hinged with the swing rod, the shaft A7 drives the two shafts B9 to synchronously rotate through the two limit blocks A11, the two shafts B9 respectively drive the corresponding shafts C27 to synchronously rotate through the corresponding universal cross joints 26, and the shaft C27 drives the corresponding four fixture blocks 30 to synchronously rotate through the corresponding cylindrical heads 29. The two clamping blocks 30 entering the swing groove 34 move towards the swing block 37 at one side outside the swing groove 34, and the limiting block B47 positioned in the arc-shaped groove 31 does not form a barrier to the swing of the clamping blocks 30 along with the column head 29. During the movement of the latch 30 having the arc-shaped slot 31 toward the swing block 37, the stopper B47 is always in its initial state, and the two latches 30 located outside the swing slot 34 move toward the direction inside the swing slot 34.

In the process that the swing rod 19 swings towards the corresponding U-shaped seat 20, the swing rod 19 is manually swung upwards by a small angle around the hinged point of the swing rod 19 and the two support lugs 16 on the ring sleeve A15, and the U-shaped seat 20 does not interfere with the swing rod 19 when the swing rod 19 swings to be parallel to the door leaf 5. In the process that the swing rod 19 swings upwards around a hinge point of the swing rod and the ring sleeve A15, the swing rod 19 drives the winding wheel 14 to wind the thin steel wire A13 through the gear A18 and the gear B17, two ends of the thin steel wire A13 which is divided into two parts respectively pull the two limit blocks A11, the two limit blocks A11 move outwards towards the sliding groove C10 on the shaft B9 by a small amplitude and still keep a limit state that the shaft B9 and the shaft A7 rotate relatively, and the spring A12 corresponding to the limit block A11 is further compressed to store energy.

When the swing rod 19 swings to a state parallel to the door leaf 5, the swing rod 19 just crosses the U-shaped seat 20 and is positioned above the U-shaped seat 20, the two fixture blocks 30 originally positioned in the swing grooves 34 swing out of the swing grooves 34 and just interact with one end of the swing block 37, the swing block 37 kept in a static state is limited by the self-locking function of the screw 44 and the internal thread sleeve 45 which are matched with each other, the continuous swing of the fixture block 30 is limited, the door leaf 5 is prevented from being opened, and the primary locking of the closed door leaf 5 is completed. Two clamping blocks 30 originally positioned in the swing groove 34 are positioned at two sides of the corresponding positioning block 36, and the other two clamping blocks 30 are also positioned at two sides of the corresponding positioning block 36, so that a certain positioning effect is exerted on the position of the cylindrical head 29 in the rotating groove 33. Subsequently, the swing lever 19 is swung down into the U-shaped seat 20, which completes the restriction of the rotation of the shaft a7, and thus completes the complete locking of the closing door.

In the process that the swing rod 19 swings towards the inside of the U-shaped seat 20, the swing rod 19 drives the winding wheel 14 to release the thin steel wire A13 wound on the swing rod through a series of transmission, the two limiting blocks A11 reset under the reset action of the corresponding springs A12 respectively, and the thin steel wire A13 is always in a tightened state in the whole process.

When the completely locked door leaf 5 needs to be opened, the swing rod 19 is swung upwards by a small angle, so that the swing rod 19 just swings out of the U-shaped seat 20, and the swing rod 19 swinging out of the U-shaped seat 20 drives the two limit blocks A11 to slide by a small amplitude through a series of transmission, and the relative rotation of the shaft A7 and the corresponding two shafts B9 is still limited. Then the swing rod 19 drives the shaft A7 to rotate for 90 degrees in the opposite direction, the plate spring 24 deforms to store energy, the shaft A7 drives the fixture block 30 on the cylindrical head 29 to be separated from the corresponding swing block 37 and the limit block B47 through a series of transmission, and at the moment, the door leaf 5 is opened. In the process of reversely rotating the shaft A7, the swing rod 19 is manually swung downwards to be in a horizontal state, and in the process of swinging the swing rod 19 downwards to be in the horizontal state, the two limit blocks A11 are reset under the reset action of the corresponding springs A12 respectively.

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 30 with the arc-shaped groove 31 on the cylindrical head 29 is inserted into the swing groove 34 on the corresponding fixing block 32 at an angle of 45 degrees, the limiting block B47 in the swing groove 34 instantly completes the insertion into the arc-shaped groove 31 on the corresponding fixture block 30, and the door leaf 5 closed under the action of wind power is automatically locked. If the door leaf 5 is intentionally and artificially closed, after the door leaf 5 is closed, the swing link 19 is artificially inserted into the U-shaped seat 20, and the latch 30 having the arc-shaped groove 31 and the latch 30 axially distributed with the latch 30 having the arc-shaped groove 31 cooperate with the swing block 37 to completely lock the closed door leaf 5.

At this time, the worker locked in the cargo box 1 can turn the two torsion wheels 46 corresponding to the corresponding door leaves 5 in the top and bottom transmission grooves 3 in the cargo box 1 in sequence, the two torsion wheels 46 drive the corresponding screw rods 44 to rotate synchronously, and the screw rods 44 and the corresponding round sleeves 41 rotate relatively. The screw 44 pulls the corresponding slide rod 39 to retract into the corresponding slide groove a4 through the corresponding round sleeve 41 under the action of the corresponding internal thread sleeve 45, the slide rod 39 drives the corresponding swing block 37 to swing through the slide pin 40, the swing block 37 gradually releases the limitation on the corresponding two fixture blocks 30, and the swing pin performs self-adaptive sliding in the slide groove F38 on the swing block 37. At the same time, the swing of the swing block 37 pulls the corresponding limit block B47 to retract into the slide groove E35 on the inner wall of the corresponding swing groove 34 through the corresponding thin steel wire B50 to release the limitation of the movement of the latch 30 having the arc-shaped groove 31 in the direction opposite to the insertion direction of the latch into the swing groove 34 at an angle of 45 degrees.

When the limit of the swing block 37 on the two latch blocks 30 is completely released, the limit block B47 also completely releases the limit of the movement of the latch block 30 with the arc-shaped groove 31 in the direction opposite to the insertion direction into the swing groove 34 at an angle of 45 degrees, so that no matter the door leaf 5 is closed by itself or intentionally and artificially under the action of wind, the limit of any form on the latch block 30 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, thereby preventing the efficiency of the carrier from reducing the efficiency of continuously carrying cargos due to being locked in the cargo compartment 1, and simultaneously avoiding unnecessary troubles caused by the carrier being locked in the cargo compartment 1.

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 46 corresponding to the opened door leaf 5 are reversely rotated, the two torsion wheels 46 respectively drive the two swing blocks 37 to reset through a series of transmission, the two limit blocks B47 respectively reset under the reset action of the corresponding springs B49, and the two thin steel wires B50 are always in a tightened state.

When the two rotating shafts a7 of the present invention are deformed by collision when the two door leaves 5 are locked and closed, it is difficult to rotate the shaft a7 by the swing lever 19. At this time, by swinging the swing link 19 upward and greatly, the swing link 19 drives the two limit blocks a11 through a series of transmission to completely release the relative rotation restriction of the shaft a7 and the corresponding two shafts B9. Then, the shifting levers 28 on the two shafts C27 are respectively shifted to a state perpendicular to the door leaf 5, the shifting levers 28 drive the corresponding cylindrical heads 29 to synchronously rotate through the corresponding shafts C27, the cylindrical heads 29 drive the corresponding four fixture blocks 30 to synchronously rotate by 90 degrees, the swing blocks 37 do not limit the opening movement of the fixture blocks 30 along with the door leaf 5, the arc-shaped grooves 31 on the fixture blocks 30 with the arc-shaped grooves 31 are separated from the corresponding limit blocks B47, the limit blocks B47 do not limit the movement of the fixture blocks 30 along with the opening movement of the door leaf 5, the locking of the closing state of the door leaf 5 is released, and the door leaf 5 can still be easily opened under the condition that the shafts a7 deform.

In conclusion, the beneficial effects of the invention are as follows: according to the invention, the corresponding swing block 37 is driven by rotating the torsion wheel 46 to remove the limitation on the corresponding two fixture blocks 30, meanwhile, the swing block 37 drives the corresponding limit block B47 to shrink towards the corresponding annular groove 42E through the corresponding thin steel wire B50, so that the door leaf 5 which is closed and locked is unlocked and opened from the inside of the cargo compartment 1, and the situation that a person carrying the cargo is locked in the cargo compartment 1 reversely in the cargo carrying process to influence the continuous carrying of the cargo is avoided.

According to the invention, when the door leaf 5 automatically closes a driver under the action of wind power and does not check the closing condition of the rear door 2 of the cargo compartment 1, the automatically closed door leaf 5 realizes self-locking, so that the door leaf 5 is prevented from opening and closing and swinging due to road bumping in the process of truck advancing, and the loss caused by falling of the cargo in the cargo compartment 1 due to the opening and closing and swinging of the door leaf 5 is prevented.

In addition, when the two shafts A7 of the invention are deformed due to collision and can not be unlocked by rotating the swing rod 19, the swing rod 19 is swung upwards to a large extent to drive the two limit blocks A11 on the shaft A7 to remove the relative rotation limitation of the shaft A7 and the two corresponding shafts B9, so that the four fixture blocks 30 on the cylindrical head 29 are driven by the deflector rod 28 on the shifting shaft C27 to unlock by rotating, and further the door 5 of the cargo compartment 1 can still be smoothly opened under the condition that the shaft A7 is deformed due to collision.

Claims

1. The utility model provides an anticollision van rear door lock device which characterized in that: the goods van rear door comprises a goods van body, door leaves, a shaft A, a shaft B, a limiting block A, a spring A, a thin steel wire A, a winding wheel, a ring sleeve A, a swing rod, a U-shaped seat, a plate spring, a support, a cross universal joint, a shaft C, a cylindrical head, a clamping block, a fixing block, a positioning block, a swing block, a limiting block B, a spring B and a thin steel wire B, wherein two vertical hollow shafts A are symmetrically arranged on the two door leaves of the goods van rear door, and each shaft A is in rotary fit with the two supports arranged on the door leaves; each shaft A is connected with a corresponding door leaf through a leaf spring for rotationally resetting the shaft A; two ends of the shaft A are respectively sleeved with a shaft B, each shaft B is connected with a shaft C with the same central axis through a cross universal joint, and the shaft C is rotationally matched with a support arranged on a door leaf; two sliding chutes B close to the two ends of the shaft A are respectively and radially provided with a limiting block A matched with the sliding chute C on the cylindrical surface of the shaft B at the corresponding end in a sliding manner; the limiting block A is nested with a spring A for resetting the limiting block A; the tail end of each shaft C is provided with a cylindrical head with the same central axis, and the cylindrical surface of each cylindrical head is provided with two clamping blocks at intervals along the axial direction; four fixed blocks which correspond to the cylindrical heads 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 on the corresponding cylindrical head;

the cargo compartment is provided with a structure for manually driving the swinging block to swing from the cargo compartment; each fixed block is slidably matched with a limited block B matched with the arc-shaped groove on the corresponding fixture block along the direction parallel to the central axis of the shaft A, and the limited block B is nested with a spring B for resetting the limited block B; the limiting block B is provided with a driving inclined plane matched with the clamping block; one end of the swinging block, which is matched with the corresponding clamping block, drives the corresponding limiting block B to move through a thin steel wire B;

2. The rear door lock device of an anti-collision van according to claim 1, wherein: the door leaf is hinged to the rear door of the cargo compartment through a hinge; the swinging block is H-shaped, the positioning block on the fixed block is hinged between two branches at one end of the swinging block, and two branches at the other end of the swinging block are hinged with a sliding rod sliding in a sliding groove A on the cargo compartment through a sliding pin parallel to the shaft A; the sliding pin is arranged at one end of the sliding rod and slides in the sliding groove F 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.

3. The rear door lock device of an anti-collision van according to claim 2, wherein: the screw is provided with a ring sleeve B which rotates in a ring groove on the inner wall of the corresponding round sleeve; the two shafts C positioned at the two ends of the shaft A are respectively provided with a deflector rod for manually driving the shaft C to rotate; two sliding chutes B on the shaft A are respectively provided with a transmission shell, and the limiting blocks A sliding in the sliding chutes B simultaneously slide in the sliding chutes D on the corresponding transmission shells; the spring A for resetting the limiting block A is positioned in the corresponding sliding groove D; each transmission shell is connected with the corresponding door leaf through a leaf spring; one end of the spring A is connected with the end face of the corresponding limiting block A, and the other end of the spring A is connected with the inner wall of the corresponding sliding groove D; the swing rod is hinged between the two support lugs on the ring sleeve A; the shaft A and the transmission shell are internally provided with a fixed pulley which guides the thin steel wire A to effectively pull the limiting block A to move.

4. The rear door lock device of an anti-collision van according to claim 1, wherein: the fixed block is provided with a rotating groove matched with the corresponding cylindrical head, 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 cylindrical head, 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 B slides in a sliding groove E on the inner wall of the swinging groove; the thin steel wire B 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 thin steel wire B passes the guide ring.

5. The rear door lock device of an anti-collision van according to claim 2, wherein: a gear A is arranged on a hinge pin for hinging the swing rod and the support lug, and a gear B arranged on a shaft on which the winding wheel is arranged is meshed with the gear A.

6. The rear door lock device of an anti-collision van according to claim 5, wherein: the transmission ratio of the gear A to the gear B is larger than 1.