Protective assembly of flatbed cart

Abstract

A protection assembly of a flatbed cart comprises a cart hopper bottom plate, a cart hopper vertical plate, a cart hopper opening and closing door and protection buffer frames, the upper portion of the cart hopper bottom plate is fixedly connected with the cart hopper vertical plate, the opening end of the cart hopper vertical plate is connected with the cart hopper opening and closing door, the cart hopper opening and closing door slides in the cart hopper vertical plate, and the two protection buffer frames are connected to the outer side of the cart hopper vertical plate. The hopper vertical plate and the hopper opening and closing door are prevented from being collided and deformed, the service life of the hopper vertical plate and the service life of the hopper opening and closing door are prolonged, the protection buffer frame plays a role in buffering the hopper vertical plate and the hopper opening and closing door, the protection buffer frame is pressed, and the collision force is reduced under the action of the double springs; the impact force received by the hopper vertical plate and the hopper opening and closing door is reduced, the protection effect is better, and goods are prevented from falling off and being lost.

Description

Technical Field

[0001] The utility model relates to the field of carts, in particular to a protective component of a flatbed cart. Background Art

[0002] The existing patent (application number: 202122471128.4) proposes a foldable protective assembly for a flatbed cart, including a frame, wherein the four top corners of the frame are screwed with fixing columns, and the upper and lower parts of the outer walls on one side of the four fixing columns are provided with insertion holes, and two protective plates are fixed on the four fixing columns, and the protective plates include a plate body, and slots are provided at both sides of the outer walls on both sides of the plate body, and rods are slidably inserted in the four slots, and springs are sleeved on the rods; the outer wall of the above-mentioned device is often deformed by bumps and the structure has defects, which needs to be improved. Summary of the invention

[0003] The utility model aims at the above-mentioned deficiencies in the prior art and provides a protective component for a flatbed cart which prevents a truck bed plate and a truck bed switch door from being deformed by collision, thereby extending the service life of the truck bed plate and the truck bed switch door. The protective buffer frame has a buffering effect on the truck bed plate and the truck bed switch door. The protective buffer frame is subjected to pressure and the impact force is reduced under the action of double springs, thereby reducing the impact force received by the truck bed plate and the truck bed switch door. The protective effect is better and a protective component for a flatbed cart is provided to prevent goods from falling and being lost.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A protective component of a flatbed cart comprises a bucket bottom plate, a bucket vertical plate, a bucket switch door, and a protective buffer frame. The upper portion of the bucket bottom plate is fixedly connected to the bucket vertical plate, the open end of the bucket vertical plate is connected to the bucket switch door, the bucket switch door slides in the bucket vertical plate, and the outer side of the bucket vertical plate is connected to two protective buffer frames. The protective buffer frame comprises a No. 1 protective plate, a No. 2 protective plate, a No. 1 buffer bracket, and a No. 2 buffer bracket. One end of the No. 1 buffer bracket is connected to the bucket vertical plate, and the other end of the No. 1 buffer bracket is connected to the No. 1 protective plate, and one side of the No. 1 protective plate is connected to the No. 2 protective plate. The outer side of the No. 2 protective plate is connected to the No. 2 buffer bracket, and the other end of the No. 2 buffer bracket is connected to the bucket vertical plate. The No. 1 buffer bracket has the same structure as the No. 2 buffer bracket. The No. 1 protective plate One side has a No. 1 slide groove, the inner side of the No. 1 slide groove is connected to the No. 2 protective plate, and the No. 2 protective plate slides in the No. 1 slide groove; one side of the No. 2 protective plate has a No. 2 slide groove, the inner side of the No. 2 slide groove is connected to the No. 1 protective plate, and the No. 1 protective plate slides in the No. 2 slide groove; the inner side of the No. 1 slide groove has two positioning protrusions, the inner side of the No. 2 slide groove has two No. 3 slide grooves, the positioning protrusions cooperate with the No. 3 slide grooves, the outer side of the positioning protrusions is connected to the No. 3 slide grooves, and the positioning protrusions slide in the No. 3 slide grooves; the inner side of the No. 1 slide groove has a plurality of adjustment holes, and the adjustment holes are evenly distributed between the two positioning protrusions; the inner side of the No. 2 slide groove has a plurality of positioning holes, and the positioning holes are evenly distributed between the two No. 3 slide grooves, the adjustment holes correspond to the positioning holes, and the screws pass through the adjustment holes to connect the positioning holes.

[0006] The utility model describes that the other side of the No. 1 protective plate is provided with a No. 1 fixed connecting sleeve, the inner side of the No. 1 fixed connecting sleeve is connected to a No. 1 buffer bracket, the outer side of the No. 1 fixed connecting sleeve is provided with a No. 1 spring positioning sleeve, one end of the No. 1 protective plate is connected to the No. 1 auxiliary protective plate through a hinge, one side of the No. 1 auxiliary protective plate is provided with a No. 6 slide groove, one side of the No. 1 protective plate is provided with a No. 4 slide groove, the open end of the No. 4 slide groove corresponds to the open end of the No. 6 slide groove, the inner side of the No. 4 slide groove is connected to a No. 1 adjusting angle plate through a rotating shaft, the No. 1 adjusting angle plate is adapted to the No. 4 slide groove, the other end of the No. 1 adjusting angle plate is connected to the No. 6 slide groove through a rotating shaft, and the No. 1 adjusting angle plate slides in the No. 6 slide groove.

[0007] The utility model describes that the other side of the No. 2 protective plate is provided with a No. 2 fixed connecting sleeve, the inner side of the No. 2 fixed connecting sleeve is connected to the No. 2 buffer bracket, the outer side of the No. 2 fixed connecting sleeve is provided with a No. 2 spring positioning sleeve, one end of the No. 2 protective plate is connected to the No. 2 auxiliary protective plate through a hinge, the outer side of the No. 2 auxiliary protective plate is provided with a No. 7 slide groove, the outer side of the No. 2 protective plate is provided with a No. 5 slide groove, the open end of the No. 5 slide groove corresponds to the open end of the No. 7 slide groove, the inner side of the No. 5 slide groove is connected to the No. 2 adjusting angle plate through a rotating shaft, the No. 2 adjusting angle plate is adapted to the No. 5 slide groove, the other end of the No. 2 adjusting angle plate is connected to the No. 7 slide groove through a rotating shaft, and the No. 2 adjusting angle plate slides in the No. 7 slide groove. Beneficial Effects

[0008] The distance between the first buffer bracket and the second buffer bracket of the utility model can be adjusted according to the length of the bucket vertical plate, so that the first protective plate and the second protective plate surround the bucket vertical plate and the bucket switch door, and the first protective plate and the second protective plate are protected at the outside of the bucket vertical plate and the bucket switch door, thereby protecting the bucket vertical plate and the bucket switch door, preventing the bucket vertical plate and the bucket switch door from being deformed by collision, and extending the service life of the bucket vertical plate and the bucket switch door.

[0009] The utility model provides a protective buffer frame that buffers the bucket vertical plate and the bucket switch door. When the No. 1 protective plate and the No. 2 protective plate are impacted by external force, the protective buffer frame is subjected to pressure, and the impact force is reduced under the action of the double springs. When the No. 1 spring is compressed into the No. 3 spring positioning sleeve under the action of the No. 1 protective plate and the No. 2 protective plate, the No. 1 spring also moves into the buffer positioning seat. When the buffer support rod drives the positioning slide groove to move toward the bucket vertical plate, under the action of the spring's own elastic force, the collision force and the elastic force interact and reduce each other, thereby reducing the impact force received by the bucket vertical plate and the bucket switch door, and the protective effect is better.

[0010] The No. 1 auxiliary protective plate and the No. 2 auxiliary protective plate outside the No. 1 protective plate and the No. 2 protective plate of the utility model can be unfolded 180 degrees, and can also be bent 90 degrees. When the No. 1 auxiliary protective plate is unfolded, it is convenient to open and close the truck bed door. When the No. 1 auxiliary protective plate is bent, it plays a role of blocking the opening and closing of the truck bed door, so as to prevent the cargo from falling and being lost when the truck bed door is opened and closed and the door is forgotten to be locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the protective component structure of a flatbed cart described in the utility model.

[0012] Figure 2 It is a schematic diagram of the structure of a protective buffer frame of a protective component of a flatbed cart described in the utility model.

[0013] Figure 3 This is a schematic diagram of the assembly structure of a No. 1 protective plate and a No. 2 protective plate of a protective component of a flatbed cart described in the utility model.

[0014] Figure 4 This is a schematic diagram of the structure of a protective plate No. 1 of a protective component of a flatbed cart described in the utility model.

[0015] Figure 5 This is a schematic diagram of the structure of the second protective plate of the protective component of the flatbed cart described in the utility model.

[0016] Figure 6 This is a schematic diagram of the structure of a No. 1 buffer bracket of a protective component of a flatbed cart described in the utility model.

[0017] Figure 7It is a schematic diagram of the structure of a buffer positioning seat of a protective component of a flatbed cart described in the utility model.

[0018] Figure 8 The utility model is a schematic diagram of a buffer support rod structure of a protective component of a flatbed cart. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below according to the accompanying drawings and embodiments:

[0020] Embodiment 1:

[0021] A protective component of a flatbed cart comprises a bucket bottom plate 01, a bucket vertical plate 02, a bucket switch door 03, and a protective buffer frame. The upper portion of the bucket bottom plate 01 is fixedly connected to the bucket vertical plate 02, the open end of the bucket vertical plate 02 is connected to the bucket switch door 03, the bucket switch door 03 slides in the bucket vertical plate 02, and the outer side of the bucket vertical plate 02 is connected to two protective buffer frames. The protective buffer frame comprises a No. 1 protective plate 04, a No. 2 protective plate 05, a No. 1 buffer bracket 07, and a No. 2 buffer bracket 71. One end of the No. 1 buffer bracket 07 is connected to the bucket vertical plate 02, and the other end of the No. 1 buffer bracket 07 is connected to the No. 1 protective plate 04, one side of the No. 1 protective plate 04 is connected to the No. 2 protective plate 05, the outer side of the No. 2 protective plate 05 is connected to the No. 2 buffer bracket 71, and the other end of the No. 2 buffer bracket 71 is connected to the bucket vertical plate 02. The No. 1 buffer bracket 07 has the same structure as the No. 2 buffer bracket 71, and one side of the No. 1 protective plate 04 has a No. 1 slide Slot 14, the inner side of No. 1 slide slot 14 is connected to the No. 2 protective plate 05, the No. 2 protective plate 05 slides in the No. 1 slide slot 14, one side of the No. 2 protective plate 05 is provided with the No. 2 slide slot 15, the inner side of the No. 2 slide slot 15 is connected to the No. 1 protective plate 04, the No. 1 protective plate 04 slides in the No. 2 slide slot 15, the inner side of the No. 1 slide slot 14 is provided with two positioning protrusions 16, the inner side of the No. 2 slide slot 15 is provided with two No. 3 slide slots 17, the positioning protrusions 16 cooperate with the No. 3 slide slot 17, the outer side of the positioning protrusion 16 is connected to the No. 3 slide slot 17, the positioning protrusion 16 slides in the No. 3 slide slot 17, the inner side of the No. 1 slide slot 14 is provided with a plurality of adjustment holes 28, the adjustment holes 28 are evenly distributed between the two positioning protrusions 16, the inner side of the No. 2 slide slot 15 is provided with a plurality of positioning holes 29, the positioning holes 29 are evenly distributed between the two No. 3 slide slots 17, the adjustment holes 28 correspond to the positioning holes 29, and the screws pass through the adjustment holes 28 to connect the positioning holes 29, The distance between the No. 1 buffer bracket 07 and the No. 2 buffer bracket 71 can be adjusted according to the length of the bucket vertical plate 02, and the bucket vertical plate 02 and the bucket switch door 03 are surrounded on the inner side of the No. 1 protective plate 04 and the No. 2 protective plate 05 to prevent the bucket vertical plate 02 and the bucket switch door 03 from being bumped and deformed, thereby extending the service life of the bucket vertical plate 02 and the bucket switch door 03, and the protective buffer frame has a buffering effect on the bucket vertical plate 02 and the bucket switch door 03, and the No. 1 protective plate 04 and the No. 2 protective plate 05 are connected. When the protective buffer frame is hit by external force, the pressure is applied to reduce the impact force under the action of the double springs. When the No. 1 spring 32 is compressed into the No. 3 spring positioning sleeve 37 under the action of the No. 1 protective plate 04 and the No. 2 protective plate 05, the No. 1 spring 32 also moves into the buffer positioning seat 30. When the buffer support rod 31 drives the positioning slide groove 34 to move toward the bucket vertical plate 02, under the action of the spring's own elastic force, the collision force and the elastic force interact and reduce each other, thereby reducing the impact force received by the bucket vertical plate 02 and the bucket switch door 03, and the protective effect is better.

[0022] Embodiment 2:

[0023] The utility model has a No. 1 fixed connection sleeve 18 on the other side of the No. 1 protective plate 04, the No. 1 fixed connection sleeve 18 is connected to the No. 1 buffer bracket 07 on the inner side, and a No. 1 spring positioning sleeve 20 is provided on the outer side of the No. 1 fixed connection sleeve 18. One end of the No. 1 protective plate 04 is connected to the No. 1 auxiliary protective plate 10 through a hinge, and one side of the No. 1 auxiliary protective plate 10 has a No. 6 slide groove 26, and one side of the No. 1 protective plate 04 has a No. 4 slide groove 24, and the open end of the No. 4 slide groove 24 corresponds to the open end of the No. 6 slide groove 26. The inner side of the No. 4 slide groove 24 is connected to the No. 1 adjustment angle through a rotating shaft. Plate 22, the No. 1 adjusting angle plate 22 is adapted to the No. 4 slide groove 24, the other end of the No. 1 adjusting angle plate 22 is connected to the No. 6 slide groove 26 through a rotating shaft, the No. 1 adjusting angle plate 22 slides in the No. 6 slide groove 26, the No. 1 auxiliary protective plate 10 outside the No. 1 protective plate 04 can be unfolded 180°, and can also be bent 90°. When the No. 1 auxiliary protective plate 10 is unfolded, it is convenient for the truck bed door 03 to open and close the door. When the No. 1 auxiliary protective plate 10 is bent, it plays a blocking role for the truck bed door 03 to prevent the cargo from falling and being lost when the truck bed door 03 forgets to lock the door.

[0024] Embodiment 3:

[0025] The utility model has a No. 2 fixed connecting sleeve 19 on the other side of the No. 2 fixed connecting sleeve 19, the inner side of which is connected to the No. 2 buffer bracket 71, the outer side of the No. 2 fixed connecting sleeve 19 is provided with a No. 2 spring positioning sleeve 21, one end of the No. 2 protective plate 05 is connected to the No. 2 auxiliary protective plate 11 through a hinge, the outer side of the No. 2 auxiliary protective plate 11 is provided with a No. 7 slide groove 27, the outer side of the No. 2 protective plate 05 is provided with a No. 5 slide groove 25, the open end of the No. 5 slide groove 25 corresponds to the open end of the No. 7 slide groove 27, the inner side of the No. 5 slide groove 25 is connected to the No. 2 adjusting angle plate 23 through a rotating shaft, the No. 2 adjusting angle plate 23 is adapted to the No. 5 slide groove 25, the other end of the No. 2 adjusting angle plate 23 is connected to the No. 7 slide groove 27 through a rotating shaft, the No. 2 adjusting angle plate 23 slides in the No. 7 slide groove 27, and the No. 2 auxiliary protective plate 11 on the outer side of the No. 2 protective plate 05 can be unfolded 180° or bent 90°.

[0026] Embodiment 4:

[0027] The utility model No. 1 buffer bracket 07 includes a buffer positioning seat 30, a buffer support rod 31, a No. 1 spring 32, and a No. 2 spring 33. One end of the buffer positioning seat 30 is connected to the bucket vertical plate 02, and the other end of the buffer positioning seat 30 is provided with a No. 3 spring positioning sleeve 37. The inner side of the buffer positioning seat 30 is connected to the buffer support rod 31, and the buffer support rod 31 slides in the buffer positioning seat 30. The other end of the buffer support rod 31 is connected to the No. 1 fixed connection sleeve 18. A No. 1 spring 32 is arranged on the outer side of the buffer support rod 31. One end of the No. 1 spring 32 is connected to the No. 3 spring positioning sleeve 37, and the other end of the No. 1 spring 32 is connected to the No. 1 spring positioning sleeve 20. The outer side of the buffer positioning seat 30 is provided with two positioning slide grooves 34, and the positioning slide grooves 34 are symmetrically arranged. One end of the buffer support rod 31 is provided with a limit block 35, and the limit block 35 Cooperating with the buffer positioning seat 30, the outer side of the limit block 35 is connected to the buffer positioning seat 30, the limit block 35 slides in the buffer positioning seat 30, the outer side of the limit block 35 is provided with two limit protrusions 36, the limit protrusions 36 are symmetrically arranged, the limit protrusions 36 cooperate with the positioning slide groove 34, the outer side of the limit protrusion 36 is connected to the positioning slide groove 34, the limit protrusion 36 slides in the positioning slide groove 34, the inner side of the buffer positioning seat 30 is connected to the No. 2 spring 33, one end of the No. 2 spring 33 is connected to the limit block 35, and the other end of the No. 2 spring 33 is connected to the truck bucket vertical plate 02, a plurality of universal wheels 08 are connected to the bottom of the truck bucket bottom plate 01, the universal wheels 08 are evenly distributed on the bottom plate of the truck bucket bottom plate 01, the outer side of the truck bucket bottom plate 01 is provided with a pull rod connecting ear 09, and the inner side of the pull rod connecting ear 09 is connected to the pull rod 06 through a rotating shaft.

[0028] Embodiment 5:

[0029] Installation steps: The distance between the No. 1 buffer bracket 07 and the No. 2 buffer bracket 71 can be adjusted according to the length of the bucket vertical plate 02, so that the No. 1 protective plate 04 and the No. 2 protective plate 05 embrace the bucket vertical plate 02 and the bucket switch door 03, and the No. 1 protective plate 04 and the No. 2 protective plate 05 are protected on the outside of the bucket vertical plate 02 and the bucket switch door 03, which protects the bucket vertical plate 02 and the bucket switch door 03, prevents the bucket vertical plate 02 and the bucket switch door 03 from being bumped and deformed, and prolongs the service life of the bucket vertical plate 02 and the bucket switch door 03, and the protective buffer frame has a buffering effect on the bucket vertical plate 02 and the bucket switch door 03. When the No. 1 protective plate 04 and the No. 2 protective plate 05 are hit by external force, the protective buffer frame is under pressure, and the impact force is reduced under the action of the double springs. The No. 1 spring 32 When the No. 1 guard plate 04 and the No. 2 guard plate 05 are compressed into the No. 3 spring positioning sleeve 37, the No. 1 spring 32 also moves into the buffer positioning seat 30. When the buffer support rod 31 drives the positioning slide groove 34 to move toward the bucket vertical plate 02, under the action of the spring's own elastic force, the collision force and the elastic force interact and cancel each other out, thereby reducing the impact force received by the bucket vertical plate 02 and the bucket switch door 03, and the protection effect is better. The No. 1 auxiliary guard plate 10 and the No. 2 auxiliary guard plate 11 outside the No. 1 guard plate 04 and the No. 2 guard plate 05 can be unfolded 180° or bent 90°. When the No. 1 auxiliary guard plate 10 is unfolded, it is convenient for the bucket switch door 03 to open and close. When the No. 1 auxiliary guard plate 10 is bent, it plays a blocking role for the bucket switch door 03 to prevent the cargo from falling and being lost when the bucket switch door 03 forgets to lock the door.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A protective assembly for a flatbed cart, characterized in that The invention comprises a truck bed bottom plate (01), a truck bed vertical plate (02), a truck bed switch door (03), and a protective buffer frame. The upper part of the truck bed bottom plate (01) is fixedly connected to the truck bed vertical plate (02). The open end of the truck bed vertical plate (02) is connected to the truck bed switch door (03). The truck bed switch door (03) slides in the truck bed vertical plate (02). The outer side of the truck bed vertical plate (02) is connected to two protective buffer frames. The protective buffer frames comprise a first protective plate (04), a second protective plate (05), a first buffer bracket (07), and a second buffer bracket (71 ), one end of the No. 1 buffer bracket (07) is connected to the bucket vertical plate (02), the other end of the No. 1 buffer bracket (07) is connected to the No. 1 protective plate (04), one side of the No. 1 protective plate (04) is connected to the No. 2 protective plate (05), the outer side of the No. 2 protective plate (05) is connected to the No. 2 buffer bracket (71), the other end of the No. 2 buffer bracket (71) is connected to the bucket vertical plate (02), the No. 1 buffer bracket (07) and the No. 2 buffer bracket (71) have the same structure, one side of the No. 1 protective plate (04) is provided with a No. 1 slide groove (14), the No. 1 slide groove (14) is connected to the second protective plate (05) on the inside, the second protective plate (05) slides in the first slide groove (14), one side of the second protective plate (05) is provided with a second slide groove (15), the inside of the second slide groove (15) is connected to the first protective plate (04), the first protective plate (04) slides in the second slide groove (15), the inside of the first slide groove (14) is provided with two positioning protrusions (16), the inside of the second slide groove (15) is provided with two third slide grooves (17), the positioning protrusions (16) and the third slide grooves (17) are matched, The outer side of the positioning protrusion (16) is connected to the No. 3 slide groove (17), and the positioning protrusion (16) slides in the No. 3 slide groove (17). The inner side of the No. 1 slide groove (14) has a plurality of adjustment holes (28), and the adjustment holes (28) are evenly distributed between the two positioning protrusions (16). The inner side of the No. 2 slide groove (15) has a plurality of positioning holes (29), and the positioning holes (29) are evenly distributed between the two No. 3 slide grooves (17). The adjustment holes (28) correspond to the positioning holes (29), and the screws pass through the adjustment holes (28) and connect the positioning holes (29).

2. A protective assembly for a flatbed cart according to claim 1, characterized in that The other side of the No. 1 protective plate (04) is provided with a No. 1 fixed connection sleeve (18), the inner side of the No. 1 fixed connection sleeve (18) is connected to the No. 1 buffer bracket (07), the outer side of the No. 1 fixed connection sleeve (18) is provided with a No. 1 spring positioning sleeve (20), one end of the No. 1 protective plate (04) is connected to the No. 1 auxiliary protective plate (10) through a hinge, one side of the No. 1 auxiliary protective plate (10) is provided with a No. 6 slide groove (26), one side of the No. 1 protective plate (04) is provided with a No. 4 slide groove (24), the open end of the No. 4 slide groove (24) corresponds to the open end of the No. 6 slide groove (26), the inner side of the No. 4 slide groove (24) is connected to the No. 1 adjustment angle plate (22) through a rotating shaft, the No. 1 adjustment angle plate (22) is adapted to the No. 4 slide groove (24), the other end of the No. 1 adjustment angle plate (22) is connected to the No. 6 slide groove (26) through a rotating shaft, and the No. 1 adjustment angle plate (22) slides in the No. 6 slide groove (26).

3. A protective assembly for a flatbed cart according to claim 2, characterized in that The second protective plate (05) has a second fixed connection sleeve (19) on the other side, the inner side of the second fixed connection sleeve (19) is connected to the second buffer bracket (71), the outer side of the second fixed connection sleeve (19) is provided with a second spring positioning sleeve (21), one end of the second protective plate (05) is connected to the second auxiliary protective plate (11) through a hinge, the outer side of the second auxiliary protective plate (11) is provided with a seventh slide groove (27), the outer side of the second protective plate (05) is provided with a fifth slide groove (25), the open end of the fifth slide groove (25) corresponds to the open end of the seventh slide groove (27), the inner side of the fifth slide groove (25) is connected to the second adjustment angle plate (23) through a rotating shaft, the second adjustment angle plate (23) is adapted to the fifth slide groove (25), the other end of the second adjustment angle plate (23) is connected to the seventh slide groove (27) through a rotating shaft, and the second adjustment angle plate (23) slides in the seventh slide groove (27).

4. A protective assembly for a flatbed cart according to claim 3, characterized in that The No. 1 buffer bracket (07) comprises a buffer positioning seat (30), a buffer support rod (31), a No. 1 spring (32), and a No. 2 spring (33); one end of the buffer positioning seat (30) is connected to the bucket vertical plate (02); the other end of the buffer positioning seat (30) is provided with a No. 3 spring positioning sleeve (37); the inner side of the buffer positioning seat (30) is connected to the buffer support rod (31); the buffer support rod (31) slides in the buffer positioning seat (30); the other end of the buffer support rod (31) is connected to a No. 1 fixed connecting sleeve (18); the outer side of the buffer support rod (31) is provided with a No. 1 spring (32); one end of the No. 1 spring (32) is connected to the No. 3 spring positioning sleeve (37); the other end of the No. 1 spring (32) is connected to the No. 1 spring positioning sleeve (20).

5. The protective assembly of a flatbed cart according to claim 3, characterized in that The buffer positioning seat (30) has two positioning grooves (34) on the outside, and the positioning grooves (34) are symmetrically arranged. One end of the buffer support rod (31) has a limit block (35), the limit block (35) matches with the buffer positioning seat (30), the outside of the limit block (35) is connected to the buffer positioning seat (30), and the limit block (35) slides in the buffer positioning seat (30). The limit block (35) has two limit protrusions (36) on the outside, and the limit protrusions (36) are symmetrically arranged. The limit protrusions (36) match with the positioning grooves (34), the outside of the limit protrusions (36) is connected to the positioning grooves (34), and the limit protrusions (36) slide in the positioning grooves (34).

6. The protective assembly of a flatbed cart according to claim 3, characterized in that The inner side of the buffer positioning seat (30) is connected to a No. 2 spring (33), one end of the No. 2 spring (33) is connected to a limit block (35), and the other end of the No. 2 spring (33) is connected to a truck bed vertical plate (02). The bottom of the truck bed bottom plate (01) is connected to a plurality of universal wheels (08), and the universal wheels (08) are evenly distributed on the bottom plate of the truck bed bottom plate (01). The outer side of the truck bed bottom plate (01) is provided with a tie rod connecting ear (09), and the inner side of the tie rod connecting ear (09) is connected to a tie rod (06) via a rotating shaft.

Images