An adjustable safety protection device for the bottom frame of a compact rack

Abstract

The present invention relates to the technical field of compact shelves, and particularly to an adjustable safety protection device for the bottom frame of a compact shelf. The present invention provides an adjustable safety protection device for the bottom frame of a compact shelf that moves smoothly, safely and reliably. An adjustable safety protection device for the bottom frame of a compact shelf includes a slide rail, a bottom frame, a first fixing plate, a walking wheel, a first rotating shaft, etc. The slide rail is supported on the ground. Four first fixing plates are evenly spaced and connected to the upper part of the bottom frame. The left and right sides between the lower parts of the two front first fixing plates are rotatably connected to the first rotating shaft. The left and right sides between the lower parts of the two rear first fixing plates are rotatably connected to the first rotating shaft. The middle of the first rotating shaft is connected with a walking wheel. The two front walking wheels roll on the front slide rail, and the two rear walking wheels roll on the rear slide rail. By setting the second rotating shaft and the flat belt, the present invention ensures the synchronization of the movement of the walking wheels. At the same time, by clamping the driven wheel on the slide rail, the present invention ensures the smooth movement of the bottom frame.

Description

Technical Field

[0001] The present invention relates to the technical field of compact shelves, and particularly to an adjustable safety protection device for the bottom frame of a compact shelf. Background Art

[0002] Existing compact shelves are composed of several separate filing cabinets and stand on a flat ground. The compact shelves are usually installed with sliding rails for the overall movement of the compact shelves on the supported ground. The compact shelves are installed on the bottom frame and move along the corresponding sliding rails through the corresponding walking wheels on the bottom frame. Therefore, the whole structure is supported only by the walking wheels. Since the compact shelves are composed of multiple groups connected together, the center of gravity becomes higher, and the contact area between the walking wheels and the track is small. When the moving speed of the frame changes from slow to fast or from fast to slow, the frame is prone to tipping over, causing casualties and damage to the frame itself and the items carried on the frame. At present, the prior art moves and supports through walking wheels, which cannot ensure the synchronous movement of the walking wheels, easily leads to the phenomenon that the front and rear ends of the bottom frame move out of sync, the operation is unstable, and safety accidents are likely to occur.

[0003] How to design an adjustable safety protection device for the bottom frame of a compact shelf with stable, safe and reliable movement is the technical problem to be solved by this patent. Summary of the Invention

[0004] In order to overcome the disadvantages that the prior art moves and supports through walking wheels, cannot ensure the synchronous movement of the walking wheels, easily leads to the phenomenon that the front and rear ends of the bottom frame move out of sync, the operation is unstable, and safety accidents are likely to occur, the technical problem to be solved is: to provide an adjustable safety protection device for the bottom frame of a compact shelf with stable, safe and reliable movement.

[0005] The technical solution of the present invention is: an adjustable safety protection device for the bottom frame of a compact shelf, including a sliding rail, a bottom frame, a first fixing plate, a walking wheel and a first rotating shaft. The sliding rail is installed on the ground. Four first fixing plates are evenly spaced and connected to the upper part of the bottom frame. On the left and right sides between the lower parts of the two front first fixing plates, the first rotating shafts are rotatably connected. On the left and right sides between the lower parts of the two rear first fixing plates, the first rotating shafts are rotatably connected. The middle of the first rotating shafts are all connected with walking wheels. The two front walking wheels roll on the front sliding rail, and the two rear walking wheels roll on the rear sliding rail. It further includes a synchronization mechanism and a protection mechanism. The first fixing plate is provided with a synchronization mechanism for ensuring the synchronous operation of the walking wheels and ensuring the stable movement of the bottom frame. The synchronization mechanism is connected to the first rotating shaft. The bottom frame is provided with a protection mechanism, and the protection mechanism is clamped on the sliding rail.

[0006] In one embodiment, the synchronization mechanism includes a second rotating shaft, a flat belt, a first fixing column, and a transmission gear. A first fixing column is connected to the middle of each of the four first fixing plates. A second rotating shaft is rotatably connected between the lower parts of the four first fixing columns. The rear side of the second rotating shaft is rotatably connected to the rear side of the chassis. The rear parts of the two front rotating shafts are wound with a flat belt around the front part of the second rotating shaft through a transmission wheel. The front parts of the two rear rotating shafts are wound with a flat belt around the rear part of the second rotating shaft through a transmission wheel. The second rotating shaft is used to cooperate with the flat belt to drive the first rotating shaft to rotate to ensure the synchronous operation of the walking wheels. A transmission gear is connected to the rear part of the second rotating shaft.

[0007] In one embodiment, the protection mechanism includes an L-shaped bracket, a driven wheel, a nut, and a bearing bolt. L-shaped brackets are symmetrically connected to the front and rear sides of the lower part of the chassis. Two bearing bolts are fixedly installed on the L-shaped brackets through nuts. Driven wheels for ensuring the stable movement of the chassis are connected to the lower sides of the bearing bolts. The four front driven wheels are stuck into the front slide rail, and the four rear driven wheels are stuck into the front slide rail.

[0008] In one embodiment, a reinforcement mechanism for increasing the gravity of the chassis is further included. The reinforcement mechanism includes a second fixing plate, a second fixing column, a pull rope, and a gravity block. Second fixing plates are connected to the front and rear sides of the chassis. Second fixing columns are connected to the upper parts of the second fixing plates. Pull ropes are connected to the second fixing columns. Gravity blocks are connected to the lower ends of the pull ropes, and the gravity blocks increase the gravity of the chassis.

[0009] In one embodiment, a limiting mechanism for preventing the chassis from tipping over is further included. The limiting mechanism includes a limiting plate, a third fixing plate, a second torsion spring, a wedge block, a fixing sleeve, a clamping column, and a first linear spring. Through holes are evenly spaced on the outer sides of the upper parts of the two slide rails. Limiting plates are connected to the outer sides of the upper parts of the two slide rails. Third fixing plates are connected to the front and rear sides of the chassis. Fixing sleeves are rotatably connected to the bottoms of the third fixing plates. A second torsion spring is connected between the front fixing sleeve and the bottom of the front third fixing plate. A second torsion spring is connected between the rear fixing sleeve and the bottom of the rear third fixing plate. The second torsion spring is sleeved on the fixing sleeve. Clamping columns are slidably connected to the lower parts of the fixing sleeves. The limiting plate limits the clamping column. A first linear spring is connected between the front clamping column and the front fixing sleeve. A first linear spring is connected between the rear clamping column and the rear fixing sleeve. The first linear spring is sleeved on the clamping column. Wedge blocks are connected to the outer sides of the clamping columns, and the wedge blocks drive the clamping columns to move inwards and insert into the through holes.

[0010] In one embodiment, the edge of the through hole is inclined, which is used to assist the clamping column to be stuck into the through hole.

[0011] In one embodiment, a swinging assembly and a pressing mechanism for automatically moving the clamping post inwardly into the through hole are further included. A swinging assembly is provided on the upper part of the second fixing plate. The swinging assembly is used to drive the pressing mechanism to squeeze the wedge block. The swinging assembly includes a first slider, a first torsion spring and a first swing rod. A first slider is connected between the two gravity blocks. The upper parts of the two second fixing plates are rotatably connected with a first swing rod. The front first swing rod is slidably connected with the front first slider, and the rear first swing rod is slidably connected with the rear first slider. The gravity block drives the first swing rod to swing through the first slider. A first torsion spring is connected between the upper part of the front first swing rod and the front second fixing plate, and a first torsion spring is connected between the upper part of the rear first swing rod and the rear second fixing plate. The first torsion spring is sleeved on the second fixing plate; the pressing mechanism includes a sliding rod, a second linear spring, a U-shaped tooth, a rack and a push rod. Two sliding rods are connected to the upper parts of the two second fixing plates. The racks are slidably connected to the sliding rods. The upper parts of the sliding rods are sleeved with second linear springs. The two ends of the second linear spring are connected to the sliding rod and the rack. The upper parts of the first swing rods are connected with U-shaped teeth. The U-shaped teeth are engaged with the racks. The upper parts of the racks are connected with push rods. The push rods are slidably connected with the sliding rods. The bottom of the push rod contacts the wedge block. The first swing rod swings to drive the rack and the push rod to move downward through the U-shaped tooth, and the push rod squeezes the wedge block inward.

[0012] In one embodiment, a supporting mechanism for supporting the ground to prevent tipping is further included. The supporting mechanism includes a second slider, a second swing rod, a third fixing post and a third torsion spring. Two second sliders are rotatably connected to the lower sides of the two first swing rods. The left and right sides of the chassis are symmetrically connected with third fixing posts in the front and rear. The upper parts of the third fixing posts are rotatably connected with second swing rods. The two left second swing rods are respectively slidably connected with the two inner second sliders, and the two right second swing rods are respectively slidably connected with the two outer second sliders. The first swing rod drives the second swing rod to rotate and support on the ground through the second slider. The upper parts of the third fixing posts are sleeved with third torsion springs. The two ends of the third torsion spring are connected to the second swing rod and the third fixing post.

[0013] The beneficial effects are as follows: By setting the second rotating shaft and the flat belt in the present invention, the synchronous movement of the walking wheels is ensured. By the driven wheel being stuck on the slide rail, the smooth movement of the chassis is ensured; the gravity block increases the gravity of the chassis to prevent the chassis from tipping when driving the compact rack to move on the slide rail; the limiting plate limits the clamping post to prevent the clamping post from crossing the through hole when tilting left or right. Push the wedge block inward with your foot, and the wedge block drives the clamping post to move inward and insert into the through hole to prevent the chassis from tipping; the first swing rod swings to drive the rack and the push rod to move downward through the U-shaped tooth, and the push rod squeezes the wedge block inward, and the wedge block drives the clamping post to move inward and snap into the through hole, so that the clamping post can be automatically snapped into the through hole to prevent the chassis from tipping; the first swing rod drives the second swing rod to swing and support on the ground through the second slider to prevent the chassis from tipping. Description of the Drawings

[0014] Figure 1 This is a three-dimensional structure schematic diagram of the present invention.

[0015] Figure 2 This is a partial three-dimensional structure schematic diagram of the present invention.

[0016] Figure 3 This is an enlarged three-dimensional structure schematic diagram of part A of the present invention.

[0017] Figure 4 This is a three-dimensional structure schematic diagram of the synchronization mechanism of the present invention.

[0018] Figure 5 This is a partial three-dimensional structure schematic diagram of the first type of protection mechanism of the present invention.

[0019] Figure 6 This is a partial three-dimensional structure schematic diagram of the second type of protection mechanism of the present invention.

[0020] Figure 7 This is a three-dimensional structure schematic diagram of the reinforcement mechanism of the present invention.

[0021] Figure 8 This is a three-dimensional structure schematic diagram of the limiting mechanism of the present invention.

[0022] Figure 9 This is a three-dimensional structure schematic diagram of the downward pressing mechanism of the present invention.

[0023] Figure 10 This is an enlarged three-dimensional structure schematic diagram of part B of the present invention.

[0024] Figure 11 This is a partial three-dimensional structure schematic diagram of the first type of support mechanism of the present invention.

[0025] Figure 12 This is a partial three-dimensional structure schematic diagram of the second type of support mechanism of the present invention.

[0026] In the attached drawing reference numerals: 1 - slide rail, 2 - chassis, 3 - first fixing plate, 4 - traveling wheel, 41 - first rotating shaft, 5 - synchronization mechanism, 51 - second rotating shaft, 52 - flat belt, 53 - first fixing column, 54 - transmission gear, 6 - protection mechanism, 61 - L-shaped bracket, 62 - driven wheel, 63 - nut, 64 - bearing bolt, 7 - reinforcement mechanism, 71 - second fixing plate, 72 - second fixing column, 73 - pulling rope, 74 - gravity block, 75 - first slider, 76 - first torsion spring, 77 - first swing rod, 8 - limiting mechanism, 81 - through hole, 82 - limiting plate, 83 - third fixing plate, 84 - second torsion spring, 85 - wedge block, 86 - fixing sleeve, 87 - clamping column, 88 - first linear spring, 9 - pressing mechanism, 91 - sliding rod, 92 - second linear spring, 93 - U-shaped tooth, 94 - rack, 95 - push rod, 10 - support mechanism, 101 - second slider, 102 - second swing rod, 103 - third fixing column, 104 - third torsion spring. Specific implementation mode

[0027] The present invention will be further described below in conjunction with the embodiments shown in the attached drawings.

[0028] Embodiment 1

[0029] An adjustable safety protection device for the chassis of a compact rack, referring to Figures 1-6 , includes a slide rail 1, a chassis 2, a first fixing plate 3, traveling wheels 4, a first rotating shaft 41, a synchronization mechanism 5 and a protection mechanism 6. The slide rail 1 is installed on the ground. Four first fixing plates 3 are fixedly connected to the upper part of the chassis 2 at equal intervals through bolts. First rotating shafts 41 are rotatably connected to the left and right sides between the lower parts of the two front first fixing plates 3, and first rotating shafts 41 are rotatably connected to the left and right sides between the lower parts of the two rear first fixing plates 3. Traveling wheels 4 are connected to the middle of the first rotating shafts 41. The two front traveling wheels 4 roll on the front slide rail 1, and the two rear traveling wheels 4 roll on the rear slide rail 1. A synchronization mechanism 5 is provided on the first fixing plate 3. The synchronization mechanism 5 is used to ensure the synchronous operation of the traveling wheels 4. The synchronization mechanism 5 is connected to the first rotating shaft 41. A protection mechanism 6 is provided on the chassis 2. The protection mechanism 6 is used to ensure the stable movement of the chassis 2. Referring to Figure 4, the synchronization mechanism 5 includes a second rotating shaft 51, a flat belt 52, a first fixing column 53 and a transmission gear 54. The middle parts of the four first fixing plates 3 are all connected with a first fixing column 53. A second rotating shaft 51 is rotatably connected between the lower parts of the four first fixing columns 53. The rear side of the second rotating shaft 51 is rotatably connected with the rear side of the chassis 2. The rear parts of the two first rotating shafts 41 on the front side and the front part of the second rotating shaft 51 are wound with a flat belt 52 through a transmission wheel. The front parts of the two first rotating shafts 41 on the rear side and the rear part of the second rotating shaft 51 are wound with a flat belt 52 through a transmission wheel. The second rotating shaft 51 is used to cooperate with the flat belt 52 to drive the first rotating shaft 41 to rotate to ensure the synchronous operation of the traveling wheels 4. A transmission gear 54 is connected to the rear part of the second rotating shaft 51, and the transmission gear 54 is driven to rotate by controlling an external driving part. Refer to Figures 5-6 , the protection mechanism 6 includes an L-shaped bracket 61, a driven wheel 62, a nut 63 and a bearing bolt 64. The left and right sides of the lower part of the chassis 2 are symmetrically fixed and connected with an L-shaped bracket 61 through bolts. Two bearing bolts 64 are fixedly installed on the L-shaped bracket 61 through nuts 63. Driven wheels 62 are connected to the lower sides of the bearing bolts 64. The driven wheels 62 are used to ensure the stable movement of the chassis 2. The four driven wheels 62 on the front side are stuck into the front slide rail 1, and the four driven wheels 62 on the rear side are stuck into the front slide rail 1. During use, the compact shelf is installed on the chassis 2. When the transmission gear 54 rotates, it drives the second rotating shaft 51 to rotate. The second rotating shaft 51 drives the first rotating shafts 41 on the left and right sides to rotate through the transmission wheel and the flat belt 52. The first rotating shaft 41 drives the traveling wheels 4 to rotate and move on the slide rail 1, so that the chassis 2 and the first fixing plate 3 move. Through the arranged second rotating shaft 51 and the flat belt 52, the synchronous movement of the traveling wheels 4 is ensured when moving, and the stability of the movement of the chassis 2 is improved. When the chassis 2 moves on the slide rail 1, it drives the L-shaped bracket 61, the driven wheel 62, the nut 63 and the bearing bolt 64 to move. The bearing bolt 64 is fixed by the nut 63, and the height of the driven wheel 62 can be adjusted, so that the driven wheel 62 is stuck on the slide rail 1 to ensure the stable movement of the chassis 2.

[0030] Embodiment 2

[0031] On the basis of Embodiment 1, refer to Figure 1 and Figure 7 , a reinforcement mechanism 7 is further included. The reinforcement mechanism 7 includes a second fixing plate 71, a second fixing column 72, a pulling rope 73 and a gravity block 74. The front and rear sides of the chassis 2 are fixedly connected with a second fixing plate 71 through bolts. The upper parts of the second fixing plates 71 are fixedly connected with a second fixing column 72 through bolts. Pulling ropes 73 are connected to the second fixing columns 72. Gravity blocks 74 are connected to the lower ends of the pulling ropes 73. The gravity blocks 74 are used to increase the gravity of the chassis 2. By increasing the gravity of the chassis 2 with the gravity blocks 74, it is prevented that the chassis 2 drives the compact shelf to tip over when moving on the slide rail 1.

[0032] Refer to Figure 1 andFigure 8 , and also includes a limiting mechanism 8, which includes a limiting plate 82, a third fixing plate 83, a second torsion spring 84, a wedge block 85, a fixing sleeve 86, a clamping column 87 and a first linear spring 88. Through holes 81 are evenly spaced apart on the outer sides of the upper parts of the two slide rails 1, and the edges of the through holes 81 are inclined. The limiting plates 82 are welded on the outer sides of the upper parts of the two slide rails 1. The third fixing plates 83 are connected to the front and rear sides of the chassis 2. The bottom of the third fixing plate 83 is rotatably connected to the fixing sleeve 86. The second torsion spring 84 is connected between the fixing sleeve 86 on the front side and the bottom of the third fixing plate 83 on the front side. The fixing sleeve on the rear side A second torsion spring 84 is connected between 86 and the bottom of the third fixed plate 83 on the rear side, and the second torsion spring 84 is sleeved on the fixed sleeve 86. A clamping column 87 is slidably connected to the lower part of the fixed sleeve 86. The limiting plate 82 is used to limit the clamping column 87 to prevent the clamping column 87 from crossing the through hole 81. The clamping column 87 moves inward and is inserted into the through hole 81. A first linear spring 88 is connected between the front clamping column 87 and the front fixed sleeve 86, and a first linear spring 88 is connected between the rear clamping column 87 and the rear fixed sleeve 86. The first linear spring 88 is sleeved on the clamping column 87, and a wedge block 85 is connected to the outside of the clamping column 87. When the base frame 2 tilts to the left or right, the third fixing plate 83 is driven to tilt to the left or right. The third fixing plate 83 drives the second torsion spring 84, the wedge block 85, the fixing sleeve 86, the clamping column 87 and the first linear spring 88 to tilt to the left or right. The limiting plate 82 limits the clamping column 87 to prevent the clamping column 87 from crossing the through hole 81 when tilting to the left or right. At this time, the clamping column 87 corresponds to the through hole 81. Then people use their feet to move the wedge block 85 inward, and the wedge block 85 drives the clamping column 87 to move inward. The first linear spring 88 is stretched, so that the clamping column 87 is stuck. The clamping column 87 is inserted into the through hole 81, thereby preventing the bottom frame 2 from tipping over. When the clamping column 87 moves inward and abuts against the edge slope of the through hole 81, people use their feet to slightly move the wedge block 85 to adjust the direction of the clamping column 87. The second torsion spring 84 is deformed, so that the clamping column 87 can be stuck in the through hole 81. People loosen the wedge block 85, and the first linear spring 88 resets the wedge block 85 and the clamping column 87. The second torsion spring 84 resets the wedge block 85, the fixing sleeve 86, the clamping column 87 and the first linear spring 88, and the bottom frame 2 can be straightened.

[0033] Reference Figure 1 , Figure 7 , Figure 9 and Figure 10, further comprising a swing assembly and a pressing mechanism 9. A swing assembly is provided on the upper part of the second fixing plate 71. The swing assembly is used to drive the pressing mechanism 9 to squeeze the wedge block 85. The swing assembly includes a first slider 75, a first torsion spring 76 and a first swing rod 77. A first slider 75 is connected between the two gravity blocks 74. The upper parts of the two second fixing plates 71 are rotatably connected with a first swing rod 77 respectively. The front first swing rod 77 is slidably connected with the front first slider 75, and the rear first swing rod 77 is slidably connected with the rear first slider 75. A first torsion spring 76 is connected between the front first swing rod 77 and the front second fixing plate 71, and a first torsion spring 76 is connected between the rear first swing rod 77 and the rear second fixing plate 71. The first torsion spring 76 is sleeved on the second fixing plate 71. The pressing mechanism 9 includes a slide rod 91, a second linear spring 92, a U-shaped tooth 93, a rack 94 and a push rod 95. Two slide rods 91 are fixedly connected to the upper parts of the two second fixing plates 71 by bolts. A rack 94 is slidably connected to each slide rod 91. A second linear spring 92 is sleeved on the upper part of each slide rod 91. The two ends of the second linear spring 92 are connected to the slide rod 91 and the rack 94. A U-shaped tooth 93 is connected to the upper part of each first swing rod 77. The U-shaped tooth 93 meshes with the rack 94. A push rod 95 is welded to the upper part of each rack 94. The push rod 95 is slidably connected to the slide rod 91. The bottom of the push rod 95 contacts the wedge block 85.When the base frame 2 tilts to the left, it drives the second fixed plate 71 and the upper part of the second fixed column 72 to swing to the left. The gravity block 74 is always in a vertical state due to gravity, so that the first swing rod 77 and the second fixed plate 71 form a relative rotation, the first torsion spring 76 is deformed, and the first swing rod 77 drives the rack 94 on the left side to move upward and the rack 94 on the right side to move downward through the U-shaped tooth 93. The second linear spring 92 on the left side is compressed, and the second linear spring 92 on the right side is stretched. The rack 94 on the left side drives the push rod 95 on the left side to move upward and separate from the wedge block 85, and the rack 94 on the right side drives the push rod 95 on the right side to move downward and squeeze the wedge block 85 to move inward. When the base frame 2 tilts to the right, it drives the second fixed plate 71 and the upper part of the second fixed column 72 to swing to the right. The gravity block 74 is always in a vertical state due to gravity, so that the first swing rod 77 and the second fixed plate 71 form a relative rotation. The first torsion spring 76 is deformed. The first swing rod 77 drives the rack 94 on the left side to move upward and the rack 94 on the right side to move downward. The first swing rod 77 drives the rack 94 on the left side to move downward and the rack 94 on the right side to move upward through the U-shaped tooth 93, the second linear spring 92 on the left side is stretched, and the second linear spring 92 on the right side is compressed, and the rack 94 on the left side drives the push rod 95 on the left side to move downward and squeeze the wedge block 85 to move inward, and the rack 94 on the right side drives the push rod 95 on the right side to move downward and squeeze the wedge block 85 to move inward and separate from the wedge block 85. In this way, when the base frame 2 tilts to the left or right, the wedge block 85 can automatically drive the card column 87 to move inward and get into the through hole 81 to prevent the base frame 2 from tilting. When the base frame 2 is straightened, it drives the second fixed plate 71, the second fixed column 72, the pull rope 73, the gravity block 74, the first slider 75 and the first swing rod 77 to reset, and the first torsion spring 76 is reset accordingly. The first swing rod 77 drives the rack 94 and the push rod 95 to reset through the U-shaped tooth 93, and the second linear spring 92 is reset accordingly.

[0034] Reference Figure 1 , Figure 11 and Figure 12, further comprising a support mechanism 10, the support mechanism 10 includes a second slider 101, a second swing rod 102, a third fixed column 103 and a third torsion spring 104. Two second sliders 101 are rotatably connected to the lower sides of the two first swing rods 77. The two second sliders 101 are arranged front and back. Third fixed columns 103 are symmetrically welded to the left and right sides of the chassis 2 in the front and back directions. Second swing rods 102 are rotatably connected to the upper parts of the third fixed columns 103. The two second swing rods 102 on the left are respectively slidably connected to the two inner second sliders 101, and the two second swing rods 102 on the right are respectively slidably connected to the two outer second sliders 101. The second swing rod 102 is used to support on the ground to prevent the chassis 2 from tipping over. Third torsion springs 104 are sleeved on the upper parts of the third fixed columns 103. The two ends of the third torsion spring 104 are connected to the second swing rod 102 and the third fixed column 103. When the lower part of the first swing rod 77 swings to the left, the second slider 101 on the inner side drives the second swing rod 102 on the left to rotate and support on the ground, and the third torsion spring 104 on the left deforms, so as to prevent the chassis 2 from tipping to the left. When the lower part of the first swing rod 77 swings to the right, the second slider 101 on the outer side drives the second swing rod 102 on the right to rotate and support on the ground, and the third torsion spring 104 on the right deforms, so as to prevent the chassis 2 from tipping to the right. When the first swing rod 77 is in the upright position, the second swing rod 102 is driven by the second slider 101 to reset, and the third torsion spring 104 resets accordingly.

[0035] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. An adjustable safety protection device for the bottom frame of a compact shelving, comprising a slide rail (1), a bottom frame (2), a first fixing plate (3), a traveling wheel (4) and a first rotating shaft (41). The slide rail (1) is installed on the ground. Four first fixing plates (3) are evenly spaced and connected to the upper part of the bottom frame (2). The left and right sides between the lower parts of the two front first fixing plates (3) are rotatably connected to the first rotating shaft (41). The left and right sides between the lower parts of the two rear first fixing plates (3) are rotatably connected to the first rotating shaft (41). The middle of the first rotating shaft (41) is connected with the traveling wheel (4). The two front traveling wheels (4) roll on the front slide rail (1), and the two rear traveling wheels (4) roll on the rear slide rail (1). It is characterized in that: It further includes a synchronization mechanism (5) and a protection mechanism (6). A synchronization mechanism (5) for ensuring the synchronous movement of the walking wheels (4) is provided on the first fixing plate (3). The synchronization mechanism (5) is connected to the first rotating shaft (41). A protection mechanism (6) is provided on the chassis (2), and the protection mechanism (6) is snap-connected to the slide rail (1). It further includes a limiting mechanism (8) for preventing the chassis (2) from tipping over. The limiting mechanism (8) includes a limiting plate (82), a third fixing plate (83), a second torsion spring (84), a wedge block (85), a fixing sleeve (86), a clamping post (87) and a first linear spring (88). Through holes (81) are evenly spaced on the outer sides of the upper parts of the two slide rails (1). Limiting plates (82) are connected to the outer sides of the upper parts of the two slide rails (1). Third fixing plates (83) are connected to the front and rear sides of the chassis (2). Fixing sleeves (86) are rotatably connected to the bottoms of the third fixing plates (83). A second torsion spring (84) is connected between the front fixing sleeve (86) and the bottom of the front third fixing plate (83). A second torsion spring (84) is connected between the rear fixing sleeve (86) and the bottom of the rear third fixing plate (83). The second torsion spring (84) is sleeved on the fixing sleeve (86). Clamping posts (87) are slidably connected to the lower parts of the fixing sleeves (86). The limiting plate (82) limits the clamping posts (87). A first linear spring (88) is connected between the front clamping post (87) and the front fixing sleeve (86). A first linear spring (88) is connected between the rear clamping post (87) and the rear fixing sleeve (86). The first linear spring (88) is sleeved on the clamping post (87). Wedge blocks (85) are connected to the outer sides of the clamping posts (87). Second fixing plates (71) are connected to the front and rear sides of the chassis (2). It further includes a pressing mechanism (9). A swinging assembly is provided on the upper part of the second fixing plate (71), and the swinging assembly is used to drive the pressing mechanism (9) to squeeze the wedge block (85). First swing rods (77) are rotatably connected to the upper parts of the two second fixing plates (71). The pressing mechanism (9) includes a slide rod (91), a second linear spring (92), a U-shaped tooth (93), a rack (94) and a push rod (95). Two slide rods (91) are connected to the upper parts of the two second fixing plates (71). Racks (94) are slidably connected to the slide rods (91). Second linear springs (92) are sleeved on the upper parts of the slide rods (91). The two ends of the second linear spring (92) are connected to the slide rod (91) and the rack (94). U-shaped teeth (93) are connected to the upper parts of the first swing rods (77). The U-shaped teeth (93) are engaged with the racks (94). Push rods (95) are connected to the upper parts of the racks (94). The push rods (95) are slidably connected to the slide rods (91). The bottom of the push rod (95) contacts the wedge block (85). When the first swing rod (77) swings, the U-shaped tooth (93) drives the rack (94) and the push rod (95) to move downward, and the push rod (95) squeezes the wedge block (85) to move inward. The wedge block (85) drives the clamping post (87) to move inward and insert into the through hole (81).

2. The adjustable safety protection device for the bottom frame of a compact rack according to claim 1, characterized in that: The synchronization mechanism (5) includes a second rotating shaft (51), a flat belt (52), a first fixed column (53), and a transmission gear (54). The middle parts of the four first fixing plates (3) are all connected with a first fixed column (53). A second rotating shaft (51) is rotatably connected between the lower parts of the four first fixed columns (53). The rear side of the second rotating shaft (51) is rotatably connected with the rear side of the chassis (2). The rear parts of the two first rotating shafts (41) at the front side and the front part of the second rotating shaft (51) are wound with a flat belt (52) through a transmission wheel. The front parts of the two first rotating shafts (41) at the rear side and the rear part of the second rotating shaft (51) are wound with a flat belt (52) through a transmission wheel. The second rotating shaft (51) drives the first rotating shaft (41) to rotate in cooperation with the flat belt (52) to ensure the synchronous movement of the walking wheels (4). A transmission gear (54) is connected to the rear part of the second rotating shaft (51).

3. The adjustable safety protection device for the bottom frame of a compact shelving according to claim 2, characterized in that: The protection mechanism (6) includes an L-shaped bracket (61), a driven wheel (62), a nut (63), and a bearing bolt (64). The left and right sides of the lower part of the chassis (2) are symmetrically connected with L-shaped brackets (61) front and rear. Two bearing bolts (64) are fixedly installed on the L-shaped brackets (61) through nuts (63). Driven wheels (62) for ensuring the smooth movement of the chassis (2) are connected to the lower sides of the bearing bolts (64). The four driven wheels (62) at the front side are engaged in the front slide rail (1), and the four driven wheels (62) at the rear side are engaged in the front slide rail (1).

4. The adjustable safety protection device for the bottom frame of a compact shelving according to claim 3, wherein: It further includes a reinforcement mechanism (7) for increasing the gravity of the chassis (2) to prevent the chassis (2) from tipping over. The reinforcement mechanism (7) includes a second fixing plate (71), a second fixed column (72), a pull rope (73), a gravity block (74), and a swinging assembly. The upper parts of the second fixing plates (71) are all connected with second fixed columns (72). Pull ropes (73) are connected to the second fixed columns (72). Gravity blocks (74) are connected to the lower ends of the pull ropes (73). The gravity blocks (74) increase the gravity of the chassis (2).

5. The adjustable safety protection device for the bottom frame of a compact rack according to claim 4, characterized in that: The edge of the through hole (81) is inclined, which is used to assist the clamping post (87) to be clamped into the through hole (81).

6. The adjustable safety protection device for the bottom frame of a compact rack according to claim 5, characterized in that: The swinging assembly includes a first slider (75), a first torsion spring (76), and a first swing rod (77). First sliders (75) are connected in the middle of the two gravity blocks (74). The front first swing rod (77) is slidably connected with the front first slider (75), and the rear first swing rod (77) is slidably connected with the rear first slider (75). The gravity blocks (74) drive the first swing rod (77) to swing through the first slider (75). A first torsion spring (76) is connected between the upper part of the front first swing rod (77) and the front second fixing plate (71), and a first torsion spring (76) is connected between the upper part of the rear first swing rod (77) and the rear second fixing plate (71). The first torsion spring (76) is sleeved on the second fixing plate (71).

7. The adjustable safety protection device for the bottom frame of a compact shelving according to claim 6, wherein: It further includes a support mechanism (10) for supporting the ground to prevent the chassis (2) from tipping over. The support mechanism (10) includes a second slider (101), a second swing rod (102), a third fixed column (103), and a third torsion spring (104). Two second sliders (101) are rotatably connected to the lower sides of the two first swing rods (77). Third fixed columns (103) are symmetrically connected to the left and right sides of the chassis (2) in the front and rear. Second swing rods (102) are rotatably connected to the upper parts of the third fixed columns (103). The two second swing rods (102) on the left are respectively slidably connected to the two inner second sliders (101), and the two second swing rods (102) on the right are respectively slidably connected to the two outer second sliders (101). The first swing rod (77) drives the second swing rod (102) to rotate and support on the ground through the second slider (101). Third torsion springs (104) are sleeved on the upper parts of the third fixed columns (103), and the two ends of the third torsion spring (104) are connected to the second swing rod (102) and the third fixed column (103).

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