CN113335356B - Foldable movable material rack - Google Patents

Abstract

The invention belongs to the technical field of material racks, and particularly relates to a foldable movable material rack which comprises a lower swing support plate, a foldable connecting rod, an upper swing support plate, a rear support frame, a front support frame and a locking mechanism. According to the invention, the locking mechanism is designed on the travelling mechanism, after the material rack is placed on a truck, the two travelling mechanisms on the same side are locked by the locking mechanism, so that the material rack is prevented from sliding in a truck box in the transportation process, and the goods on the material rack can be prevented from falling; the locking mechanism is executed only by stepping on the pedal and the swinging plate by an operator, and the required space is small.

Description

Foldable movable material rack

Technical Field

The invention belongs to the technical field of material racks, and particularly relates to a foldable movable material rack.

Background

In the centralized transportation process, a movable material rack with wheels is commonly used, parts are placed on the material rack, the material rack is placed on a van truck, four wheels of the material rack are locked for transportation, when the material rack without the parts returns after unloading, the material rack without the parts is folded, and after folding, the inside of a carriage is equivalent to an empty box, and other goods can be transported, so that the transportation efficiency is improved; however, the supporting plate and the stop lever need to be taken down during folding, then the supporting plate and the stop lever are vertically arranged on the front side and the rear side of the support, and finally the support is folded through the folding side connecting rods, but the existing folding technology has the problem of low efficiency; four universal wheels are generally used for the four wheels of the last material rack to facilitate movement, locking of the universal wheels requires a space for an operator to perform actions, and each wheel is locked without too much space in the van.

The invention designs a foldable movable rack which solves the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a foldable movable material rack which is realized by adopting the following technical scheme.

A foldable movable material rack comprises a lower swing support plate, a foldable connecting rod, an upper swing support plate, a rear support frame, a front support frame, a traveling mechanism and a locking mechanism, wherein two hooks are symmetrically installed on two sides of the upper end of the rear support frame, two transmission plates are symmetrically and slidably installed on the inner side of the rear support frame, and six sections of teeth are arranged on the transmission plates from top to bottom; the two first rotating shafts are distributed up and down and rotatably mounted on the rear supporting frame, the four first gears are fixedly mounted on the two first rotating shafts and are meshed with corresponding tooth areas on the two transmission plates, and four first volute springs are mounted between the two first rotating shafts and the rear supporting frame; the two third rotating shafts are vertically distributed and rotatably arranged on the rear supporting frame, the four third gears are fixedly arranged on the two third rotating shafts, and the four third gears are meshed with corresponding tooth areas on the two transmission plates; the four second rotating shafts are arranged in pairs and are arranged on two sides of the rear supporting frame in a group up and down in a rotating mode, four second gears are arranged on the four second rotating shafts, and the four second gears are meshed with corresponding tooth areas on the two transmission plates; two first supporting cross beams and two second supporting cross beams are arranged on the front supporting frame from top to bottom, the two first supporting cross beams and the two second supporting cross beams are alternately distributed from top to bottom, and the second supporting cross beam positioned in the middle is positioned on the upper side of the first supporting cross beam and is close to the first supporting cross beam; the front supporting frame and the rear supporting frame are connected through four folding connecting rods capable of being folded upwards, one ends of the four folding connecting rods are hinged to the four second rotating shafts, and the other ends of the four folding connecting rods are hinged to two side faces of the front supporting frame.

The two lower swing supporting plates are arranged on the rear supporting frame in a swinging mode through two first rotating shafts; the lower swing supporting plate comprises an upper supporting plate, a sliding supporting plate and a lower bottom frame, wherein one end of the lower bottom frame is arranged on the corresponding first rotating shaft in a swinging mode, and the other end of the lower bottom frame is uniformly provided with three locking grooves along the width direction; the two upper supporting plates are hinged with each other, one ends of the two upper supporting plates are hinged to the upper side of the lower underframe, the other ends of the two upper supporting plates are hinged to sliding supporting plates, and the sliding supporting plates are matched with the two first supporting cross beams on the front supporting frame; three locking plates are uniformly and vertically arranged on the inner side of the sliding support plate in a sliding manner along the width direction, and three return springs are arranged between the three locking plates and the sliding support plate; the three transmission sliding plates are transversely and uniformly distributed and are arranged in the sliding support plate in a sliding manner, the three transmission sliding plates correspond to the three locking plates in a sliding manner and are matched with the three locking plates in an inclined plane manner, the transmission sliding plates are stressed to slide towards one sides of the corresponding locking plates, and under the action of the inclined plane matching of the transmission sliding plates and the locking plates, the locking plates can move downwards under downward extrusion force to be matched with the locking grooves formed in the lower chassis in a corresponding manner; the first rotating shaft and the third rotating shaft are distributed on the rear supporting frame in a front-back staggered mode, and the upper swing supporting plate and the lower swing supporting plate are attached to each other in a front-back mode after being folded and closed.

The two upper swing supporting plates are arranged on the rear supporting frame in a swinging mode through two third rotating shafts, the two upper swing supporting plates are matched with two second supporting cross beams on the front supporting frame, and the two second supporting cross beams play a role in supporting one ends, far away from the rear supporting frame, of the two upper swing supporting plates.

The inner side of each second supporting cross beam in the two second supporting cross beams of the front supporting frame is uniformly provided with three push plates in an up-and-down sliding manner along the width direction, the three push plates positioned on the inner side of the same second supporting cross beam are fixedly connected through a transmission cross rod, the two transmission cross rods distributed up and down are fixedly connected through two transmission vertical rods, and the upper ends of the two transmission vertical rods penetrate through the upper end face of the front supporting frame and are fixedly provided with two hooks; six push plates and six transmission sliding plates are in one-to-one correspondence and are in inclined surface fit, and after the six push plates move upwards under force and are in contact with the six transmission sliding plates, the six transmission sliding plates are extruded to slide towards one side of the corresponding lock plate under the action of the inclined surface fit of the six push plates and the six transmission sliding plates.

Two running mechanisms are symmetrically arranged on the lower sides of the front support frame and the rear support frame, and a locking mechanism for locking the two running mechanisms arranged on the front support frame and the rear support frame is respectively arranged on the front support frame and the rear support frame.

As a further improvement of the present technology, four mounting cases for protecting the four first scroll springs are symmetrically mounted on both sides of the rear support frame.

As a further improvement of the technology, the folding connecting rod is composed of two connecting rods hinged with each other, one end of each connecting rod is hinged with a corresponding second rotating shaft, and the other end of each connecting rod is hinged with the front supporting frame; eight limiting blocks which limit the eight connecting rods arranged on the front supporting frame and the rear supporting frame to swing downwards are arranged on the front supporting frame and the rear supporting frame, and after the front supporting frame and the rear supporting frame are completely opened, two mutually hinged connecting rods form an included angle of 165-175 degrees.

As a further improvement of the technology, the inner side of the sliding support plate clamps the first mounting chute, and two ends of the first mounting chute penetrate out of the outer side of the sliding support plate; a trigger block is fixedly arranged on one side of the locking plate, a first inclined plane is arranged on the trigger block, and the locking plate is slidably arranged in a first installation chute; the one end of above-mentioned transmission slide has the transmission swash plate, and the other end of transmission slide has the second inclined plane, and transmission slide slidable mounting is in first installation spout, and the first inclined plane cooperation of the second inclined plane on the transmission slide and the trigger block of installation on the jam plate, transmission swash plate on the transmission slide and the push pedal cooperation that corresponds.

As a further improvement of the present technology, a plurality of mounting lugs for swing mounting of the upper support plate are uniformly mounted on the lower chassis along the width direction.

As a further improvement of the technology, the two second supporting cross beams on the front support are respectively provided with a second mounting sliding groove for the corresponding transmission cross rod to slide up and down.

As a further improvement of the technology, the travelling mechanism comprises a fixed support, a rotating bracket and travelling wheels, wherein the fixed support is fixedly arranged on the front support frame and the rear support frame; a supporting shaft is rotatably arranged on the rotating support, and the two walking wheels are symmetrically arranged on the supporting shaft.

The locking mechanism comprises a first pull rope, a reset spring, a pedal, a swing plate, a limiting fixture block, a hinged support lug, a slide block, a guide rail, friction plates and second pull ropes, wherein one ends of the two friction plates with elasticity are respectively fixedly arranged on the rotary supports in the two corresponding travelling mechanisms, the other ends of the two friction plates are fixedly arranged with the two second pull ropes after bypassing the corresponding support shafts, and the two second pull ropes are connected through the first pull ropes after penetrating into the rear support frame and the front support frame; one end of the pedal is provided with a third inclined surface, a step surface is arranged between the third inclined surface and the bottom surface of the pedal, the pedal is slidably arranged on the side surfaces of the front support frame and the rear support frame, and a return spring is arranged between the pedal and the front support frame and between the pedal and the rear support frame; the two guide rails are fixedly arranged on the front support frame and the rear support frame, one end of the sliding block is provided with a fourth inclined surface, the sliding block is arranged between the two guide rails in a sliding manner, and the fourth inclined surface is matched with a third inclined surface on the corresponding pressure plate; the sliding block is provided with a hinge support lug, the lower end of the swing plate is hinged on the hinge support lug, and a second volute spiral spring is arranged between the swing plate and the hinge support lug; the swing plate is fixedly provided with a limiting fixture block, the hinged support lug is provided with two fixture blocks, and the two fixture blocks are matched with the limiting fixture block on the swing plate; the first pull rope penetrates through the front support frame and the rear support frame to be fixedly connected with the swing plate, the downward swinging angle of the swing plate is smaller than the upward swinging angle under the matching of the limiting fixture block and the two fixture blocks, and the position of the first pull rope penetrating through the front support frame and the rear support frame and the swinging shaft of the swing plate are positioned on the same horizontal plane; when the swing plate swings to the maximum, the connecting point of the first pull rope and the side face of the swing plate is higher than the swing shaft of the swing plate, and the angle of the swing plate in the maximum upward swing state is larger than that in the maximum downward swing state. When the first pull rope is connected with the side face of the swing plate and the swing plate needs to be guaranteed to swing, the first pull rope does not interfere with the hinged position of the swing plate, and the swing plate and the first pull rope can be installed by the aid of the existing known technology.

As a further improvement of the technology, a trapezoidal sliding block is fixedly arranged on one side of the pedal, and the pedal is arranged on the front supporting frame and the rear supporting frame in a sliding manner through the trapezoidal sliding block; and the front support frame and the rear support piece are provided with mounting plates for fixing the return spring.

Two guide grooves are symmetrically formed in the two guide rails, two guide blocks are symmetrically arranged on two sides of the sliding block, and the sliding block is arranged between the two guide rails through the sliding fit of the two guide blocks and the two guide grooves.

As a further improvement of the technology, the rotating bracket of the traveling mechanism is provided with an installation groove for installing the friction plate.

The second pull rope is connected with the first pull rope through a rotary connecting piece, and a sliding groove for the corresponding rotary connecting piece to slide is formed in the rotary support of the travelling mechanism.

As a further improvement of the present technology, a guide plate for guiding the transmission plate is mounted on the rear support frame.

Compared with the traditional material rack technology, the invention has the following beneficial effects:

1. when the front and rear supporting frames are manually pushed to be folded, the folding connecting rod is forced to swing upwards to trigger the two lower swing supporting plates to swing downwards, the two lower swing supporting plates can be influenced by self gravity in the swinging process, the two first rotating shafts are rotated and pressed to drive auxiliary force through the self gravity of the two lower swing supporting plates, then the auxiliary force is transmitted to the upper swing supporting plates through the gears and the transmission plates, the upper swing supporting plates are assisted to swing upwards to be folded, and the effect of saving labor when the material rack is manually pushed to be folded is achieved; when the support frame is opened around the artificial pulling, folding connecting rod atress swings downwards and triggers two and go up the pendulum backup pad and swing downwards, and two go up the pendulum backup pad and can receive the influence of self gravity at swing in-process, and through two go up the pendulum backup pad and assist the lower pendulum backup pad and swing upwards and strut, under this kind of state, the gravity of going up the pendulum backup pad passes through on gear and driving plate transmit the lower pendulum backup pad, also can reach laborsaving effect when artificial pulling work or material rest is opened equally.

2. When goods are placed on the lower swing supporting plate, the goods can press down the two upper supporting plates to enable the two upper supporting plates to swing downwards and expand, the three locking plates arranged on the sliding supporting plate just move to be aligned and matched with the three locking grooves formed in the lower chassis, and the sliding supporting plate of the upper swing supporting plate is supported on the corresponding first supporting cross beam; under the state, when the material rack is lifted by the lifting mechanism, the two transmission vertical rods can firstly move upwards relative to the front support frame under the action of the gravity of the material rack and goods placed on the material rack, so that the lower ends of the locking plates are inserted into the corresponding locking grooves, the sliding support plates and the lower chassis are locked in a relative sliding mode, namely, the two upper support plates which are mutually hinged are locked, the situation that the stop rods and the support plates are crushed due to the overlarge weight of parts in the lifting process and are folded during lifting can be prevented, and safety accidents are caused.

3. When the material rack designed by the invention is used for collecting or opening, the support plates do not need to be detached or installed independently, and only the front support frame and the rear support frame need to be pushed or pulled simultaneously, so that the front support frame and the rear support frame are extruded or pulled by being stressed simultaneously, the folding connecting rod is folded, and the lower swing support plate and the upper swing support plate swing upwards or downwards to be folded or unfolded.

4. According to the invention, the locking mechanism is designed on the travelling mechanism, after the material rack is placed on a truck, the two travelling mechanisms on the same side are locked by the locking mechanism, so that the material rack is prevented from sliding in a truck box in the transportation process, and the goods on the material rack can be prevented from falling; the locking mechanism is executed only by stepping on the pedal and the swinging plate by an operator, and the required space is small.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic view of the overall component distribution.

FIG. 3 is a first shaft mounting schematic.

Fig. 4 is a schematic view of the second and third shafts.

Fig. 5 is a schematic view of the mounting of the running gear and the locking gear.

Fig. 6 is an external view of the skirt support plate.

Fig. 7 is a schematic view of the structure of the lower swing support plate.

Fig. 8 is a schematic view of the structure of the lower chassis.

Fig. 9 is a schematic view of the internal structure of the sliding plate.

Fig. 10 is a schematic diagram of the folding linkage and the upper swing support plate structure.

Fig. 11 is a schematic view of the front support frame structure.

Fig. 12 is a schematic view of the internal structure of the front support frame.

Fig. 13 is a schematic view of the connection of two running mechanisms on the same side.

Fig. 14 is a schematic view of the pedal structure.

Fig. 15 is a schematic view of a slider installation.

Fig. 16 is a schematic view of the traveling mechanism.

FIG. 17 is a schematic view of friction plate installation.

Fig. 18 is an external view of the rear support frame.

FIG. 19 is a drive plate installation schematic.

Fig. 20 is a schematic view of the working principle of the upper and lower swing support plates.

Number designation in the figures: 1. a lower hem support plate; 2. folding the connecting rod; 3. an upper swing support plate; 4. a rear support frame; 5. a front support frame; 6. a traveling mechanism; 7. a first gear; 8. a first scroll spring; 9. a first rotating shaft; 10. mounting a shell; 11. a second gear; 12. a second rotating shaft; 13. a limiting block; 14. a third gear; 15. a third rotating shaft; 16. a locking mechanism; 17. an upper support plate; 18. a sliding support plate; 19. a lower chassis; 20. a transmission slide plate; 21. a locking plate; 22. locking the groove; 23. mounting a support lug; 24. a first inclined plane; 25. a trigger block; 26. a first mounting chute; 27. a transmission sloping plate; 28. a second inclined surface; 29. a connecting rod; 30. a first support beam; 31. a second supporting beam; 32. a drive rail; 33. a second mounting chute; 34. a driving vertical rod; 35. pushing the plate; 36. hooking; 37. a first pull cord; 38. a fourth slope; 39. a trapezoidal slider; 40. mounting a plate; 41. a return spring; 42. a third inclined plane; 43. a pedal; 44. a swinging plate; 45. a limiting clamping block; 46. a clamping block; 47. a hinged lug; 48. a slider; 49. a guide block; 50. a guide groove; 51. a guide rail; 52. fixing and supporting; 53. a sliding groove; 54. rotating the bracket; 55. a second scroll spring; 56. mounting grooves; 57. a traveling wheel; 58. a support shaft; 59. a friction plate; 60. a second pull cord; 61. a rotating connector; 62. a drive plate; 63. a guide plate; 64. and a return spring.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples or figures are illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 and 2, the folding mechanism comprises a lower swing support plate 1, a folding connecting rod 2, an upper swing support plate 3, a rear support frame 4, a front support frame 5, a traveling mechanism 6 and a locking mechanism 16, wherein as shown in fig. 3, 18 and 19, two hooks 36 are symmetrically arranged on two sides of the upper end of the rear support frame 4, two transmission plates 62 are symmetrically and slidably arranged on the inner side of the rear support frame 4, and six sections of teeth are arranged on the transmission plates 62 from top to bottom; as shown in fig. 3 and 19, two first rotating shafts 9 are vertically distributed and rotatably mounted on the rear support frame 4, four first gears 7 are fixedly mounted on the two first rotating shafts 9, the four first gears 7 are engaged with corresponding tooth areas on the two transmission plates 62, and four first volute springs 8 are mounted between the two first rotating shafts 9 and the rear support frame 4; as shown in fig. 5 and 19, two third rotating shafts 15 are vertically distributed and rotatably mounted on the rear support frame 4, four third gears 14 are fixedly mounted on the two third rotating shafts 15, and the four third gears 14 are engaged with corresponding tooth areas on the two transmission plates 62; as shown in fig. 4 and 19, two second rotating shafts 12 are arranged in pairs and are arranged on two sides of the rear support frame 4 in a vertical distribution manner, four second gears 11 are arranged on the four second rotating shafts 12, and the four second gears 11 are engaged with corresponding tooth areas on the two transmission plates 62; as shown in fig. 11, two first supporting beams 30 and two second supporting beams 31 are mounted on the front support frame 5 from top to bottom, the two first supporting beams 30 and the two second supporting beams 31 are alternately distributed from top to bottom, and the second supporting beams 31 located in the middle are located on the upper sides of the first supporting beams 30 and are close to each other; as shown in fig. 1, the front support frame 5 and the rear support frame 4 are connected by four folding links 2 capable of being folded upwards, as shown in fig. 4 and 19, one ends of the four folding links 2 are hinged on four second rotating shafts 12, and the other ends of the four folding links 2 are hinged on two side surfaces of the front support frame 5.

As shown in fig. 1, two lower swing support plates 1 are installed on the rear support frame 4 through two first rotating shafts 9 in a swinging manner; as shown in fig. 6 and 7, the lower swing support plate 1 includes an upper support plate 17, a sliding support plate 18, and a lower chassis 19, wherein one end of the lower chassis 19 is installed on the corresponding first rotating shaft 9 in a swinging manner, and as shown in fig. 8, the other end of the lower chassis 19 is uniformly provided with three locking grooves 22 along the width direction; the two upper support plates 17 are hinged with each other, as shown in fig. 7, one ends of the two upper support plates 17 are hinged on the upper side of the lower chassis 19, the other ends of the two upper support plates 17 are hinged with the sliding support plate 18, and the sliding support plate 18 is matched with the two first support cross beams 30 on the front support frame 5; as shown in fig. 9, three locking plates 21 are slidably mounted on the inner side of the sliding support plate 18 up and down along the width direction, and three return springs 64 are mounted between the three locking plates 21 and the sliding support plate 18; the three transmission sliding plates 20 are transversely and uniformly arranged in the sliding support plate 18 in a sliding manner, the three transmission sliding plates 20 correspond to the three locking plates 21 in a sliding manner and are matched with the three locking plates 21 in an inclined manner, the transmission sliding plates 20 are stressed to slide towards one sides of the corresponding locking plates 21, and under the action of the inclined surface matching of the transmission sliding plates and the locking plates, the locking plates 21 can move downwards under the action of downward extrusion force to be matched with the locking grooves 22 formed in the lower chassis 19 correspondingly; as shown in fig. 2, the first rotating shaft 9 and the third rotating shaft 15 are distributed on the rear support frame 4 in a front-rear staggered manner, and after the upper swing support plate 3 and the lower swing support plate 1 are folded and closed, the upper swing support plate 3 and the lower swing support plate 1 are attached to each other in a front-rear manner.

In the invention, an upper swing support plate 3 and a lower swing support plate 1 which are positioned in the middle of four support plates are close to each other, and spaces which can allow two lower swing support plates 1 to swing downwards and two upper swing support plates 3 to swing upwards are arranged between the other two upper swing support plates 3 and the lower swing support plates 1 and the upper swing support plate 3 and the lower swing support plate 1 which are positioned in the middle.

In the invention, when the upper swing support plate 3 and the lower swing support plate 1 are folded and unfolded, the upper swing support plate 3 and the lower swing support plate 1 can swing at the same time and are in transmission connection with each other through the gear and the transmission plate 62, so that the situation that the upper swing support plate 3 and the lower swing support plate 1 are mutually influenced can occur in the swinging process.

The folding connecting rod 2 designed in the invention has a connecting effect on the front supporting frame 5 and the rear supporting frame 4.

According to the invention, when no goods are placed on the lower support plate 1, the two upper support plates 17 tilt, a gap is formed between the front end of the sliding support plate 18 and the corresponding first support cross beam 30 on the front support plate, and the first support cross beam 30 cannot interfere with the lower hem of the lower support plate 1. After goods are placed on the lower support plate 1, the sliding support plate 18 is forced to slide on the first support beam 30 toward the side of the first support beam 30 on the front support plate.

As shown in fig. 1, 5 and 10, the two upper swing support plates 3 are installed on the rear support frame 4 through two third rotating shafts 15 in a swinging manner, as shown in fig. 1, the two upper swing support plates 3 are matched with two second support cross beams 31 on the front support frame 5, and the two second support cross beams 31 support one ends, far away from the rear support frame 4, of the two upper swing support plates 3.

As shown in fig. 11 and 12, three push plates 35 are uniformly and vertically slidably mounted on the inner side of each second supporting beam 31 of the two second supporting beams 31 of the front supporting frame 5 along the width direction, the three push plates 35 located on the inner side of the same second supporting beam 31 are fixedly connected through a transmission cross rod 32, the two transmission cross rods 32 distributed vertically are fixedly connected through two transmission vertical rods 34, and two hooks 36 are fixedly mounted at the upper ends of the two transmission vertical rods 34, which penetrate through the upper end face of the front supporting frame 5; the six push plates 35 correspond to the six transmission sliding plates 20 one by one and are in inclined surface fit, and after the six push plates 35 move upwards under force to contact with the six transmission sliding plates 20, the six transmission sliding plates 20 are extruded to slide towards one side of the corresponding lock plate 21 under the action of the inclined surface fit of the six push plates and the six transmission sliding plates.

As shown in fig. 1 and 2, two traveling mechanisms 6 are symmetrically installed on the lower sides of the front support frame 5 and the rear support frame 4, and as shown in fig. 13, a locking mechanism 16 for locking the two traveling mechanisms 6 installed on the front support frame 5 and the rear support frame 4 is installed on each of them.

As shown in fig. 3, four mounting cases 10 for protecting the four first wrap springs 8 are symmetrically mounted on both sides of the rear support frame 4.

As shown in fig. 10, the folding connecting rod 2 is composed of two connecting rods 29 hinged to each other, one end of each connecting rod 29 is hinged to the corresponding second rotating shaft 12, and the other end of each connecting rod 29 is hinged to the front support frame 5; the front support frame 5 and the rear support frame 4 are provided with eight limiting blocks 13 which can limit the eight connecting rods 29 arranged on the front support frame and the rear support frame to swing downwards; after the front and rear support frames 4 are completely opened, the two connecting rods 29 which are hinged with each other form an included angle of 165-175 degrees. The limiting block 13 is used for limiting the folding connecting rod 2 to swing downwards, so that after the front and rear supporting frames 4 are completely opened, the two connecting rods 29 hinged to each other form an included angle of 165-175 degrees, and meanwhile, the folding connecting rod 2 can swing upwards after being stressed.

In the invention, because the two connecting rods 29 in the folding connecting rod 2 can simultaneously swing upwards to fold when the folding connecting rod 2 is pressed and folded, and the two connecting rods 29 hinged with each other form an included angle of 165-175 degrees, the two connecting rods 29 are folded upwards by a small angle in the fully unfolded state, in order to ensure that the folding connecting rod 2, the lower swing support plate 1 and the upper swing support plate 3 which are in transmission connection through the gear and the transmission plate 62 cannot influence each other when the material rack is folded, the diameter of the designed second gear 11 is slightly smaller than the diameter of the first gear 7 and the third gear 14.

As shown in fig. 9, the inner side of the sliding plate 18 engages with the first mounting chute 26, and both ends of the first mounting chute 26 extend out of the sliding plate 18; a trigger block 25 is fixedly mounted on one side of the locking plate 21, a first inclined surface 24 is arranged on the trigger block 25, and the locking plate 21 is slidably mounted in a first mounting chute 26; one end of the transmission sliding plate 20 is provided with a transmission sloping plate 27, the other end of the transmission sliding plate 20 is provided with a second inclined surface 28, the transmission sliding plate 20 is slidably mounted in the first mounting chute 26, the second inclined surface 28 on the transmission sliding plate 20 is matched with the first inclined surface 24 of the trigger block 25 mounted on the locking plate 21, and the transmission sloping plate 27 on the transmission sliding plate 20 is matched with the corresponding push plate 35.

As shown in fig. 8, a plurality of mounting lugs 23 for swingably mounting the upper stay 17 are mounted on the lower chassis 19 uniformly in the width direction.

As shown in fig. 12, the two second supporting beams 31 on the front bracket are respectively provided with a second mounting chute 33 for the corresponding transmission cross bar 32 to slide up and down.

As shown in fig. 16, the traveling mechanism 6 includes a fixed support 52, a rotating bracket 54, and a traveling wheel 57, wherein the fixed support 52 is fixedly mounted on the front support frame 5 and the rear support frame 4; a supporting shaft 58 is rotatably mounted on the rotating bracket 54, and two traveling wheels 57 are symmetrically mounted on the supporting shaft 58. The running gear 6 designed by the invention is a universal wheel mechanism.

As shown in fig. 13, the locking mechanism 16 includes a first pulling rope 37, a return spring 41, a pedal 43, a swing plate 44, a limit latch 45, a latch 46, a hinge lug 47, a slider 48, a guide rail 51, a friction plate 59, and a second pulling rope 60, wherein as shown in fig. 16 and 17, one end of each of the two friction plates 59 with elasticity is respectively and fixedly mounted on the corresponding rotating bracket 54 of the two traveling mechanisms 6, the other end of each of the two friction plates 59 is fixedly mounted with two second pulling ropes 60 after passing around the corresponding support shaft 58, and the two second pulling ropes 60 penetrate through the rear support frame 4 and the front support frame 5 and are connected with each other through the first pulling rope 37; as shown in fig. 14, one end of the pedal 43 has a third inclined surface 42, a step surface is provided between the third inclined surface 42 and the bottom surface of the pedal 43, the pedal 43 is slidably mounted on the side surfaces of the front support frame 5 and the rear support frame 4, and a return spring 41 is mounted between the pedal 43 and the front support frame 5 and the rear support frame 4; as shown in fig. 15, two guide rails 51 are fixedly mounted on the front support frame 5 and the rear support frame 4, one end of the slider 48 is provided with a fourth inclined surface 38, the slider 48 is slidably mounted between the two guide rails 51, and the fourth inclined surface 38 is matched with the third inclined surface 42 on the corresponding pressure plate; a hinge support lug 47 is arranged on the sliding block 48, the lower end of the swing plate 44 is hinged on the hinge support lug 47, and a second scroll spring 55 is arranged between the swing plate 44 and the hinge support lug 47; a limiting fixture block 45 is fixedly arranged on the swinging plate 44, two fixture blocks 46 are arranged on the hinged support lug 47, and the two fixture blocks 46 are matched with the limiting fixture block 45 on the swinging plate 44; the first pull rope 37 penetrates through the front support frame 5 and the rear support frame 4 to be fixedly connected with the swing plate 44, the downward swinging angle of the swing plate 44 is smaller than the upward swinging angle under the matching of the limiting clamping blocks 45 and the two clamping blocks 46, and the position of the first pull rope 37 penetrating through the front support frame 5 and the rear support frame 4 is positioned on the same horizontal plane with the swinging shaft of the swing plate 44; when the swing plate 44 swings to the maximum, the connection point of the first pull rope 37 and the swing plate 44 is higher than the swing shaft of the swing plate 44; the angle of the swing plate 44 in the maximum upward swinging state is larger than that in the maximum downward swinging state, so that the dragging degree of the swing plate 44 to the first pull rope 37 in the maximum upward swinging state can be smaller than that of the swing plate 37 in the maximum downward swinging state, the dragging degree of the swing plate 44 to the first pull rope 37 in the maximum upward swinging state is not enough to lock the traveling mechanism 6, and the dragging degree of the swing plate 44 to the first pull rope 37 in the maximum downward swinging state is enough to lock the traveling mechanism 6.

When the first pull rope 37 is pulled, the first pull rope 37 pulls the two corresponding second pull ropes 60 through the rotary connecting piece 61, the second pull ropes 60 pull the friction plates 59 to swing, so that the friction plates 59 are tightly pressed on the corresponding supporting shafts 58, and the traveling mechanism 6 is locked through friction between the friction plates 59 and the supporting shafts 58.

In the initial state of the present invention, under the elasticity of the friction plate 59 and the action of the second scroll spring 55, the swing plate 44 swings upward, and the friction plate 59 and the support shaft 58 are in a released state; the locking mechanism 16 does not lock the running mechanism 6, the fourth inclined surface 38 of the slide block 48 is positioned at the lower side of the third inclined surface 42 on the pedal 43, and the slide block 48 cannot slide towards the third inclined surface 42 side relative to the pedal 43; when the running mechanism 6 needs to be locked in the using process, the swing plate 44 is collapsed downwards, so that the swing plate 44 swings downwards, the first pull rope 37 is pulled by the downward swing of the swing plate 44, after the swing plate 44 swings to the horizontal state, the pulled stroke of the first pull rope 37 is the largest, when the swing plate continues to swing downwards, the first pull rope 37 is still in the pulled state relative to the initial state, the friction plate 59 can lock the running mechanism 6 in the pulled state, in this state, the first pull rope 37 applies downward pulling force to the swing plate 44, because the elastic force of the second scroll spring 55 is small, the swing plate 44 cannot automatically swing upwards and return under the action of the second scroll spring 55, in the downward swing state, the pulling force of the swing plate 44 to the first pull rope 37 is larger than the pulling force of the swing plate 44 to the first pull rope 37 in the upward swing state, the fourth inclined surface 38 of the sliding block 48 is positioned on the lower side of the third inclined surface 42 of the pedal 43, the surface of the sliding block 48 is in contact with the side end surface of the third inclined surface 42 of the pedal 43 at the lower end of the pedal 43, and the sliding block 48 does not slide block can slide towards the side of the third inclined surface 42; when the lock is released, the pedal 43 is stepped downwards, so that the pressure plate moves downwards, the third inclined surface 42 is matched with the fourth inclined surface 38, finally, the sliding block 48 moves a certain distance towards the first pull rope 37 under the pulling force of the first pull rope 37, the pulling force of the first sliding block 48 on the first pull rope 37 is greatly reduced, and the swinging plate 44 can overcome the residual small pulling force of the first pull rope 37 to swing upwards to be reset in a horizontal state under the action of the second scroll spring 55, and finally is located at the uppermost state. When the pedal 43 is released from being pressed down, the pedal 43 is pressed to the initial state through the third inclined surface 42 and the fourth inclined surface 38 under the action of the return spring 41, the first pull rope 37 is pulled by the swing plate 44 in the uppermost state along with the movement of the slide block 48 in the pressing process, and the state that the travelling mechanism 6 is not locked is recovered.

As shown in fig. 13, a trapezoidal sliding block 39 is fixedly installed on one side of the pedal 43, and the pedal 43 is slidably installed on the front support frame 5 and the rear support frame 4 through the trapezoidal sliding block 39; the front support 5 and the rear support are mounted with a mounting plate 40 for fixing a return spring 41.

As shown in fig. 15, two guide grooves 50 are symmetrically formed on the two guide rails 51, two guide blocks 49 are symmetrically installed on both sides of the slider 48, and the slider 48 is installed between the two guide rails 51 by the sliding fit of the two guide blocks 49 and the two guide grooves 50.

As shown in fig. 16, the rotary bracket 54 of the traveling mechanism 6 is provided with an installation groove 56 for installing a friction plate 59.

The second rope 60 and the first rope 37 are connected by a rotary joint 61, and a slide groove 53 for sliding the corresponding rotary joint 61 is formed in the rotary bracket 54 of the traveling mechanism 6.

As shown in fig. 14, a guide plate 63 for guiding the transmission plate 62 is attached to the rear support frame 4.

The specific working process is as follows: when the material rack designed by the invention is used, different methods can be adopted for use:

firstly, loading goods on a material rack on the ground, then hoisting the material rack and the goods on the material rack into a van through hoisting equipment on the van, and then manually entering the van to lock the traveling mechanisms 6 of the material racks in a trampling mode; during unloading, the material rack is lifted to the ground through lifting equipment, the locking of the travelling mechanism 6 is released, and then the material rack is pushed to move to a specified position; as shown in fig. 20, after the goods are unloaded, the empty material racks are lifted into the carriage through the lifting equipment, and then the material racks are pushed from outside to inside together, namely the material rack on the outermost side is pushed, so that the material racks placed side by side are folded at one time, the use efficiency is greatly improved, and meanwhile, the rest space can be used for transporting other things and the east.

Secondly, the material rest is placed in a truck, goods are conveyed to the truck and then sequentially placed on the material rest, and the travelling mechanism 6 of the material rest is locked in a treading mode; sequentially placing goods on each material rack; during unloading, the goods on the material rack are manually carried down; as shown in fig. 20, after the goods are unloaded, the material racks are pushed from outside to inside, namely, the material racks on the outermost sides are pushed together, so that the material racks arranged side by side are folded at one time, the use efficiency is greatly improved, and meanwhile, the rest space can be used for transporting other things and things.

When goods are placed on the material rack, the goods press down the two upper support plates 17, so that the two upper support plates 17 swing downwards and expand, in the expanding process, one ends of the two upper support plates 17 connected with the sliding support plate 18 push the sliding support plate 18 to slide on the lower chassis 19 towards one side close to the front support frame 5, after the two upper support plates 17 swing to be completely attached to the lower chassis 19, the three locking plates 21 installed on the sliding support plate 18 just move to be aligned and matched with the three locking grooves 22 opened on the lower chassis 19, and the sliding support plate 18 of the upper swing support plate 3 is supported on the corresponding first support cross beam 30. When goods are placed and the material rack is lifted upwards, the material rack is connected with four hooks 36 through lifting ropes and then lifted, when the goods are lifted, under the action of the gravity of the material rack and the goods placed on the material rack, two transmission vertical rods 34 firstly move upwards relative to the front support frame 5, two transmission vertical rods 34 move upwards to drive two transmission cross rods 32 to move upwards, the two transmission cross rods 32 move upwards to drive six push plates 35 on the two transmission cross rods to move upwards, in the process that the push plates 35 move upwards, after the upper ends of the push plates 35 are in contact with corresponding transmission sliding plates 20, the six push plates 35 push the six transmission sliding plates 20 to slide towards one side of the rear support frame 4 under the action of the transmission inclined plates 27 on the transmission sliding plates 20, the six transmission sliding plates 20 move to press the locking plates 21 to move downwards under the action of the second inclined surfaces 28 and the first inclined surfaces 24 of the trigger blocks 25 on the locking plates 21, so that the lower ends of the locking plates 21 are inserted into the corresponding locking grooves 22, the relative sliding support plates 18 and the lower support plate 19 are locked, namely, and the two upper support plates 17 which are hinged with each other can be locked, and the safety lifting accidents can be prevented. After the upper support plate 17 is locked, the two transmission cross rods 32 also move to the limit state, namely the hooks 36 arranged on the two transmission vertical plates move to the limit state, and at the moment, the four hooks 36 can transmit the pulling force of the lifting rope to the material rack. After the goods are taken away, the locking plate 21 is reset under the action of the return spring 64, and in the resetting process, the locking plate 21 drives the sliding plate support plate to reset under the action of the first inclined surface 24 on the trigger block and the sliding plate support plate 18.

When the material rack is folded, the front support frame 5 and the rear support frame are stressed simultaneously, the folding connecting rod 2 is stressed to swing upwards, in the swinging process, the connecting rod 29 installed on the second rotating shaft 12 drives the corresponding second rotating shaft 12 to rotate, the second rotating shaft 12 rotates to drive the second gear 11 to rotate, the second gear 11 rotates to drive the transmission plate 62 to slide upwards, the transmission plate 62 slides upwards to drive the first gear 7 and the third gear 14 to rotate, the first gear 7 rotates to drive the upper support swing plate 44 to swing downwards, the third gear 14 rotates to drive the lower support swing plate 44 to swing upwards, in the swinging process, the downward swinging of the two lower swing support plates 1 is influenced by the self gravity, the self gravity of the two lower swing support plates 1 applies driving auxiliary force to the rotation of the two first rotating shafts 9, so that the two first rotating shafts 9 rotate to drive the four first gears 7 to rotate, the four first gears 7 rotate to drive the two transmission plates 62 to move upwards through the matching of tooth areas meshed with the two lower swing support plates, the two transmission plates 62 move upwards to drive the four second gears 11 and the four third gears 14, the four second rotating shafts 11 rotate to drive the four second rotating shafts 12 to rotate to drive the four third rotating shafts 12, and the four third rotating shafts 12 to rotate to drive the upper swing support plates 15 to rotate, and drive the four folding connecting rods 15 to rotate; the invention transmits the downward swinging force of the lower swing support plate 1 through the self gravity to the upper swing support plate 3 through the gear and the transmission plate 62, thereby achieving the effect of saving labor; when the folding type folding bicycle is opened, the upper swing support plate 3 swings downwards through the gravity of the folding type folding bicycle, the lower swing support plate 1 swings upwards, and in this state, the gravity of the upper swing support plate 3 is transmitted to the lower swing support plate 1 through the gear and the transmission plate 62, so that the labor-saving effect is achieved.

Claims (10)

1. The utility model provides a folding activity work or material rest which characterized in that: the folding type tooth locking mechanism comprises a lower swing support plate, a folding connecting rod, an upper swing support plate, a rear support frame, a front support frame, a traveling mechanism and a locking mechanism, wherein two hooks are symmetrically arranged on two sides of the upper end of the rear support frame, two transmission plates are symmetrically and slidably arranged on the inner side of the rear support frame, and six sections of teeth are arranged on the transmission plates from top to bottom; the two first rotating shafts are distributed up and down and rotatably mounted on the rear supporting frame, the four first gears are fixedly mounted on the two first rotating shafts and are meshed with corresponding tooth areas on the two transmission plates, and four first volute springs are mounted between the two first rotating shafts and the rear supporting frame; the two third rotating shafts are vertically distributed and rotatably arranged on the rear supporting frame, the four third gears are fixedly arranged on the two third rotating shafts, and the four third gears are meshed with corresponding tooth areas on the two transmission plates; the four second rotating shafts are arranged in pairs and are arranged on two sides of the rear supporting frame in a vertically distributed and rotating mode, four second gears are arranged on the four second rotating shafts, and the four second gears are meshed with corresponding tooth areas on the two transmission plates; two first supporting cross beams and two second supporting cross beams are arranged on the front supporting frame from top to bottom, the two first supporting cross beams and the two second supporting cross beams are alternately distributed from top to bottom, and the second supporting cross beam positioned in the middle is positioned on the upper side of the first supporting cross beam and is close to the first supporting cross beam; the front support frame and the rear support frame are connected through four folding connecting rods capable of being folded upwards, one ends of the four folding connecting rods are hinged to four second rotating shafts, and the other ends of the four folding connecting rods are hinged to two side faces of the front support frame;

the two lower swing supporting plates are arranged on the rear supporting frame in a swinging mode through two first rotating shafts; the lower swing supporting plate comprises an upper supporting plate, a sliding supporting plate and a lower bottom frame, wherein one end of the lower bottom frame is arranged on the corresponding first rotating shaft in a swinging mode, and the other end of the lower bottom frame is uniformly provided with three locking grooves along the width direction; the two upper supporting plates are hinged with each other, one ends of the two upper supporting plates are hinged to the upper side of the lower underframe, the other ends of the two upper supporting plates are hinged to sliding supporting plates, and the sliding supporting plates are matched with the two first supporting cross beams on the front supporting frame; three locking plates are uniformly and vertically arranged on the inner side of the sliding support plate in a sliding manner along the width direction, and three return springs are arranged between the three locking plates and the sliding support plate; the three transmission sliding plates are transversely and uniformly distributed and are arranged in the sliding support plate in a sliding manner, the three transmission sliding plates correspond to the three locking plates in a sliding manner and are matched with the three locking plates in an inclined plane manner, the transmission sliding plates are stressed to slide towards one sides of the corresponding locking plates, and under the action of the inclined plane matching of the transmission sliding plates and the locking plates, the locking plates can move downwards under downward extrusion force to be matched with the locking grooves formed in the lower chassis in a corresponding manner; the first rotating shaft and the third rotating shaft are distributed on the rear supporting frame in a front-back staggered manner, and the upper swing supporting plate and the lower swing supporting plate are mutually attached in a front-back manner after being folded and closed;

the two upper swing supporting plates are arranged on the rear supporting frame in a swinging mode through two third rotating shafts, the two upper swing supporting plates are matched with two second supporting cross beams on the front supporting frame, and the two second supporting cross beams play a supporting role in supporting one ends, far away from the rear supporting frame, of the two upper swing supporting plates;

the inner side of each second supporting cross beam in the two second supporting cross beams of the front supporting frame is uniformly provided with three push plates in an up-and-down sliding manner along the width direction, the three push plates positioned on the inner side of the same second supporting cross beam are fixedly connected through a transmission cross rod, the two transmission cross rods distributed up and down are fixedly connected through two transmission vertical rods, and the upper ends of the two transmission vertical rods penetrate through the upper end face of the front supporting frame and are fixedly provided with two hooks; the six push plates correspond to the six transmission sliding plates one by one and are matched with the inclined surfaces, and after the six push plates move upwards under force to contact with the six transmission sliding plates, the six transmission sliding plates are extruded to slide towards one side of the corresponding lock plate under the action of the matching of the inclined surfaces of the six push plates and the six transmission sliding plates;

two running mechanisms are symmetrically arranged on the lower sides of the front support frame and the rear support frame, and a locking mechanism for locking the two running mechanisms arranged on the front support frame and the rear support frame is respectively arranged on the front support frame and the rear support frame.

2. A collapsible active stack according to claim 1, wherein: four mounting shells for protecting the four first scroll springs are symmetrically mounted on two sides of the rear support frame.

3. The collapsible active rack of claim 1, wherein: the folding connecting rod consists of two connecting rods which are hinged with each other, one end of each connecting rod is hinged to a corresponding second rotating shaft, and the other end of each connecting rod is hinged to the front supporting frame; eight limiting blocks which limit the eight connecting rods arranged on the front supporting frame and the rear supporting frame to swing downwards are arranged on the front supporting frame and the rear supporting frame, and after the front supporting frame and the rear supporting frame are completely opened, two mutually hinged connecting rods form an included angle of 165-175 degrees.

4. A collapsible active stack according to claim 1, wherein: a first mounting chute is clamped at the inner side of the sliding support plate, and two ends of the first mounting chute penetrate out of the sliding support plate; a trigger block is fixedly arranged on one side of the locking plate, a first inclined plane is arranged on the trigger block, and the locking plate is slidably arranged in a first installation chute; one end of the transmission sliding plate is provided with a transmission inclined plate, the other end of the transmission sliding plate is provided with a second inclined surface, the transmission sliding plate is slidably mounted in the first mounting chute, the second inclined surface on the transmission sliding plate is matched with the first inclined surface of the trigger block mounted on the lock plate, and the transmission inclined plate on the transmission sliding plate is matched with the corresponding push plate.

5. A collapsible active stack according to claim 1, wherein: a plurality of mounting lugs for swinging the upper support plate are uniformly arranged on the lower underframe along the width direction.

6. The collapsible active rack of claim 1, wherein: two second supporting beams on the front support are respectively provided with a second mounting sliding groove for the corresponding transmission cross rod to slide up and down.

7. A collapsible active stack according to claim 1, wherein: the walking mechanism comprises a fixed support, a rotating bracket and walking wheels, wherein the fixed support is fixedly arranged on the front support frame and the rear support frame; a supporting shaft is rotatably arranged on the rotating bracket, and the two travelling wheels are symmetrically arranged on the supporting shaft;

the locking mechanism comprises a first pull rope, a reset spring, a pedal, a swing plate, a limiting fixture block, a hinged support lug, a slide block, a guide rail, friction plates and second pull ropes, wherein one ends of the two friction plates with elasticity are respectively fixedly arranged on the rotary supports in the two corresponding travelling mechanisms, the other ends of the two friction plates are fixedly arranged with the two second pull ropes after bypassing the corresponding support shafts, and the two second pull ropes are connected through the first pull ropes after penetrating into the rear support frame and the front support frame; one end of the pedal is provided with a third inclined surface, a step surface is arranged between the third inclined surface and the bottom surface of the pedal, the pedal is slidably arranged on the side surfaces of the front support frame and the rear support frame, and a return spring is arranged between the pedal and the front support frame and between the pedal and the rear support frame; the two guide rails are fixedly arranged on the front supporting frame and the rear supporting frame, one end of the sliding block is provided with a fourth inclined surface, the sliding block is arranged between the two guide rails in a sliding manner, and the fourth inclined surface is matched with the third inclined surface on the corresponding pressing plate; the sliding block is provided with a hinge support lug, the lower end of the swing plate is hinged on the hinge support lug, and a second volute spiral spring is arranged between the swing plate and the hinge support lug; the swing plate is fixedly provided with a limiting fixture block, the hinged support lug is provided with two fixture blocks, and the two fixture blocks are matched with the limiting fixture block on the swing plate; the first pull rope penetrates through the front support frame and the rear support frame to be fixedly connected with the swing plate, the downward swinging angle of the swing plate is smaller than the upward swinging angle under the matching of the limiting fixture block and the two fixture blocks, and the position of the first pull rope penetrating through the front support frame and the rear support frame and the swinging shaft of the swing plate are positioned on the same horizontal plane; when the swing plate swings to the maximum, the connecting point of the first pull rope and the side face of the swing plate is higher than the swing shaft of the swing plate, and the angle of the swing plate in the maximum upward swing state is larger than that in the maximum downward swing state.

8. The collapsible active stack of claim 7, wherein: a trapezoidal sliding block is fixedly arranged on one side of the pedal, and the pedal is slidably arranged on the front supporting frame and the rear supporting frame through the trapezoidal sliding block; mounting plates for fixing the return spring are mounted on the front support frame and the rear support;

two guide grooves are symmetrically formed in the two guide rails, two guide blocks are symmetrically arranged on two sides of the sliding block, and the sliding block is arranged between the two guide rails through the sliding fit of the two guide blocks and the two guide grooves.

9. The collapsible active rack of claim 7, wherein: the rotating bracket of the travelling mechanism is provided with an installation groove for installing the friction plate;

the second pull rope is connected with the first pull rope through a rotary connecting piece, and a sliding groove for the corresponding rotary connecting piece to slide is formed in the rotary support of the travelling mechanism.

10. The collapsible active rack of claim 1, wherein: the rear support frame is provided with a guide plate which plays a role in guiding the transmission plate.

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