A tailgate-replacing follow-up opening and closing cargo tailboard system

Abstract

The present application relates to the field of vehicle tailgate, and proposes a follow-up opening and closing cargo tailgate system for replacing tailgate, which comprises a tailgate, a rear door frame and a follow-up small door, the follow-up small door is installed on the top of the rear door frame, and the bottom of the tailgate is provided with a lifting mechanism; further comprising a follow-up device, which is installed on the tailgate and the rear door frame, and the follow-up small door is connected with the follow-up device; the present application can ensure sealing by replacing tailgate with tailgate, and does not need to open and close the box door twice, which is convenient for loading and unloading, and the upper small door is opened and closed along with the tailgate, without manual opening, which greatly facilitates the user and improves the efficiency of loading and unloading.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle tailgates, in particular to a follow-up opening and closing cargo tailgate system replacing tailgates. BACKGROUND

[0002] With the development of society, the increasing number of cars and the increasing labor costs, the application of car tailgates is becoming more and more common. However, most of the car tailgates on the market are generally equipped behind the tailgate of the vehicle compartment, and the tailgate needs to be opened and closed every time the goods are loaded and unloaded. The use is not variable. A small door needs to be installed on the upper part of the tailgate of the vehicle compartment. When the size of the goods is high, the small door needs to be opened manually, which is still inconvenient to use and redundant in function.

[0003] At the same time, the tailgate frame, lifting arm and support seat on the market are all laser cut and welded into shape, which has complex process, many processes and difficult to guarantee the size. SUMMARY

[0004] The present application provides a follow-up opening and closing cargo tailgate system replacing tailgates, which replaces the tailgate to ensure sealing without the need to open and close the box door twice, making loading and unloading convenient. The small door above the tailgate is opened and closed with the tailgate, without the need for manual opening, greatly facilitating the user and improving the efficiency of loading and unloading goods.

[0005] The technical scheme of the present application is as follows:

[0006] A follow-up opening and closing cargo tailgate system replacing tailgates, comprising: a tailgate assembly, a rear door frame and a follow-up small door, the follow-up small door is installed on the top of the rear door frame, the tailgate assembly comprises a tailgate and a lifting mechanism, the lifting mechanism is arranged on the bottom of the tailgate;

[0007] Further comprising a follow-up device, the follow-up device is installed on the tailgate and the rear door frame, the follow-up small door is connected with the follow-up device;

[0008] The follow-up device comprises an input shaft, an output shaft, a first belt gear, a second belt gear, a gear belt, an assembled compartment, a ratchet pawl mechanism, a transmission gear and a follow-up gear;

[0009] The input shaft is rotatably installed on the assembled compartment, and the first belt gear is sleeved on the input shaft;

[0010] The output shaft is rotatably installed on the top of the rear door frame, and the second belt gear is sleeved on the output shaft;

[0011] The gear belt is sleeved on the first belt gear and the second belt gear at the same time;

[0012] The transmission gear and ratchet pawl mechanism are both mounted on the input shaft;

[0013] Support seats are installed on both the left and right sides of the bottom of the tailgate, specifically two in total, to ensure the stability of the follower gear. The follower gear is mounted on the support seats and is made of POM (polyoxymethylene) reinforced with glass fiber. This prevents excessive impact and noise between the tailgate and the follower device when the tailgate is raised to its highest point. The follower gear is fixed by a screw in the tilting center hole on the support seat. The tilting center hole is a threaded hole. The follower gear is located on the right side of the tailgate and aligned with the right-side pillar of the rear door frame. The positional relationship between the follower gear and the support seats is fixed. It can rotate on its own and only follows the flipping movement of the small door. The transmission gear and the follower gear cooperate. When the tail plate is raised to the highest point, the transmission gear and the follower gear mesh. When the tail plate flips, the follower gear transmits power to the follower device through the transmission gear. The follower device transmits power to the small door above through the output shaft to realize the follower opening and closing. The lower part of the column of the rear door frame is provided with an opening to avoid the meshing of the follower gear and the transmission gear. The hinge positions on both sides of the crossbeam at the top of the rear door frame are provided with openings to avoid the flipping trajectory of the hinge.

[0014] The follow-up small door includes a top frame, a door core, and a rain eaves. A flip hinge is installed on the output shaft and is fixedly installed on the output shaft. The top frame is connected to the flip hinge. When the output shaft rotates, it drives the flip hinge to flip, thereby realizing the synchronous flipping of the top frame, door core, and rain eaves. The door core is installed on the top frame, and the rain eaves are installed on the lower part of the top frame (referring to the side that connects with the tail plate in the closed state).

[0015] The path of rotational force transmission is as follows: tail plate flipping - follower gear - transmission gear - first belt gear - gear belt - second belt gear - output shaft - flipping hinge - top frame; power transmission is achieved through the meshing of the transmission gear and the follower gear. The flipping direction of the follower door is opposite to the flipping direction of the tail plate, so that it can be opened and closed at the same time.

[0016] Install rain gutters to prevent rainwater from dripping into the inside of the rear door frame.

[0017] Furthermore, a first sealing strip is snapped onto the left column and the right column of the rear door frame. After the tailgate is closed, the first sealing strip forms a compression and encircling seal between the tailgate and the left and right columns of the rear door frame.

[0018] The first sealing strip is connected to the front end face of the column of the rear door frame via a snap-fit ​​strip;

[0019] The left side of the top frame, the right side of the top frame and the upper side of the top frame are clamped with a second sealing strip, which realizes sealing of the connection between the follow-up small door and the upper side, the left side and the right side of the rear door frame under the extrusion of the top frame and the rear door frame after the follow-up small door is closed.

[0020] The third sealing strip is pasted on the eave, which seals the connection between the follow-up small door and the tail plate after the follow-up small door is closed.

[0021] Further, the clamping strip is an Ω-shaped thin steel plate.

[0022] Further, the first sealing strip is a double-lip structure, including a first lip and a second lip, the length of the first lip is greater than the length of the second lip, the first lip is located on the outer side, and the second lip is located on the inner side, the first lip is a turned-up lip, and the second lip is a compressed lip, the second lip is compressed after the tail plate is turned off, and the first lip wraps the side of the tail plate from the outer side, realizing double sealing.

[0023] Further, the transmission gear and the follow-up gear have the same modulus and the same number of teeth, so as to ensure that the rotation angles of the follow-up small door and the tail plate are synchronous.

[0024] Further, the gear width of the transmission gear is less than the gear width of the follow-up gear of the tail plate; when the tail plate is at the highest lifting point, the follow-up gear meshes with the transmission gear, the gear width of the follow-up gear is greater than the gear width of the transmission gear, the excess part of the gear width of the follow-up gear contacts the lower part of the pawl in the ratchet and pawl mechanism beside the transmission gear, the pawl is turned up along the rotating shaft, so as to release the ratchet, at this time, the transmission device rotates with the follow-up gear without hindrance.

[0025] Further, the lifting mechanism includes a rack, a lifting arm and a power cylinder.

[0026] One end of the lifting arm is hinged to the rack, and the other end is hinged to the bottom of the tail plate.

[0027] One end of the power cylinder is hinged to the rack, and the other end is hinged to the bottom of the tail plate.

[0028] The power cylinder is provided with one or more.

[0029] Further, the rack, the lifting arm and the support seat are integrally cast structures, without welding process, which can ensure high accuracy of size and consistency of products; the rack and the lifting arm are integrally cast, without welding process, the integrally cast rack integrates the lifting arm mounting plate, the power cylinder mounting plate, the turnover cylinder mounting plate and the rack beam, and the integrally cast lifting arm integrates the lifting arm body and the welded ring, which can ensure high accuracy of size and consistency of products.

[0030] This invention replaces the tailgate with a tailgate to ensure sealing, eliminating the need for secondary opening and closing of the cargo door, making loading and unloading convenient. Furthermore, the small door at the top opens and closes automatically with the tailgate, eliminating the need for manual opening, greatly facilitating users and improving the efficiency of loading and unloading goods. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional structural diagram of a tailgate system for a cargo tailgate that replaces the tailgate, when the follower door and tailgate are in a closed state, according to a specific embodiment of the present invention.

[0033] Figure 2 for Figure 1 The diagram shows a three-dimensional structure of a tailgate-equipped cargo tailgate system that replaces the tailgate, with the tailgate in the open state.

[0034] Figure 3 for Figure 1 , Figure 2 A three-dimensional structural diagram of a partial structure of the follow-up device of a follow-up opening and closing cargo tailgate system that replaces the tailgate.

[0035] Figure 4 for Figure 3 A three-dimensional structural diagram of another part of the servo device shown;

[0036] Figure 5 for Figure 3 , Figure 4 A three-dimensional structural diagram of another part of the servo device shown;

[0037] Figure 6 for Figure 3 , Figure 4 , Figure 5 The diagram shows the arrangement of the follow-up device on the rear door frame.

[0038] Figure 7 for Figure 3 , Figure 4 , Figure 5 A schematic diagram of the ratchet and pawl mechanism in the follower device when the pawl is in the free state;

[0039] Figure 8 for Figure 3 ,Figure 4 , Figure 5 structure state diagram of the pawl and the follow-up gear in the follow-up device in a first contact state;

[0040] Figure 9 for Figure 3 , Figure 4 , Figure 5 structure state diagram of the pawl and the follow-up gear in the follow-up device in a second contact state;

[0041] Figure 10 for Figure 1 perspective structural schematic diagram of a frame of a lifting mechanism of a tailgate assembly of a follow-up opening and closing load tailgate system of a substitute tailgate;

[0042] Figure 11 for Figure 1 perspective structural schematic diagram of a lifting arm of a lifting mechanism of a tailgate assembly of a follow-up opening and closing load tailgate system of a substitute tailgate;

[0043] Figure 12 for Figure 1 top view sectional view of a right side column of a rear door frame of a tailgate assembly of a follow-up opening and closing load tailgate system of a substitute tailgate;

[0044] Figure 13 for Figure 1 perspective structural sectional view of a rear door frame of a tailgate assembly of a follow-up opening and closing load tailgate system of a substitute tailgate in an upside state;

[0045] Figure 14 for Figure 2 right view structural schematic diagram of a follow-up opening and closing load tailgate system of a substitute tailgate;

[0046] Figure 15 for Figure 14 structural sectional view at A-A;

[0047] Figure 16 for Figure 15 structure enlarged view of a second sealing strip at B;

[0048] Figure 17 for Figure 2 rear view structural schematic diagram of a follow-up opening and closing load tailgate system of a substitute tailgate;

[0049] Figure 18 for Figure 17 structural sectional view at C-C;

[0050] Figure 19 for Figure 18 structure enlarged view of a third sealing strip at D;

[0051] Explanation of reference signs: tailgate assembly 1; tailgate 11; support seat 111; lifting mechanism 12; frame 121; lifting arm 122; power cylinder 123; rear door frame 2; follow-up small door 3; top frame 31; first sealing strip 311; clamping strip 312; second sealing strip 313; door core 32; rain eave 33; third sealing strip 331; follow-up device 4; input shaft 41; output shaft 42; first belt gear 43; second belt gear 44; gear belt 45; assembled compartment 46; ratchet pawl mechanism 47; ratchet wheel 471; pawl 472; transmission gear 48; follow-up gear 49. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0053] In specific embodiments of the present application, see Figures 1-19 A follow-up opening and closing cargo tailgate system replacing a tailgate, comprising: a tailgate assembly 1, a rear door frame 2 and a follow-up small door 3, the follow-up small door 3 is installed on the top of the rear door frame 2, the tailgate assembly 1 comprises a tailgate 11 and a lifting mechanism 12, the lifting mechanism 12 is arranged at the bottom of the tailgate 11;

[0054] Further comprising a follow-up device 4, the follow-up device 4 is installed on the tailgate 11 and the rear door frame 2, the follow-up small door 3 is connected with the follow-up device 4;

[0055] The follow-up device 4 specifically comprises an input shaft 41, an output shaft 42, a first belt gear 43, a second belt gear 44, a gear belt 45, an assembled compartment 46, a ratchet pawl mechanism 47, a transmission gear 48 and a follow-up gear 49; the follow-up device 4 is arranged in the two side columns and the top cross beam of the rear door frame 2, wherein the input shaft 41, the assembled compartment 46, the first belt gear 43, the second belt gear 44 and the ratchet pawl mechanism 47 are arranged in one of the columns of the rear door frame 2, and the output shaft 42 is arranged in the top cross beam of the rear door frame 2;

[0056] The input shaft 41 is rotatably installed on the assembled compartment 46, and the first belt gear 43 is sleeved on the input shaft 41;

[0057] The output shaft 41 is rotatably installed on the top of the rear door frame 2, and the second belt gear 44 is sleeved on the output shaft 42;

[0058] The gear belt 45 is sleeved on the first belt gear 43 and the second belt gear 44;

[0059] The transmission gear 48 and the ratchet pawl mechanism 47 are sleeved on the input shaft 41;

[0060] The bottom of the tail plate 11 is provided with a support seat 111, the follow-up gear 49 is installed on the support seat 111, and the transmission gear 48 cooperates with the follow-up gear 49; the support seat 111 is provided with one or more, specifically two, to ensure the stability of the follow-up gear; the follow-up gear 49 is made of POM (polyoxymethylene) and glass fiber material, which prevents a large impact and sound from being generated between the tail plate and the follow-up device when the tail plate is lifted to a high point; the follow-up gear 49 is fixed in a turnover center hole of the support seat 111 through a screw rod 491, the turnover center hole is a threaded hole, the follow-up gear 49 is located at the right side of the tail plate 11 and is aligned with the upright column of the rear door frame 2 right side, the positional relationship between the follow-up gear 49 and the support seat 111 is fixed and cannot rotate, but only rotates with the follow-up door 3; when the tail plate 11 is lifted to the highest point, the transmission gear 48 is engaged with the follow-up gear 49; when the tail plate is turned over, the follow-up gear transmits power to the follow-up device through the transmission gear, and the follow-up device transmits power to the follow-up door above through the output shaft, so as to realize the opening and closing of the follow-up door; the upright column of the rear door frame is provided with an opening at the lower part, which is used for avoiding the engagement of the follow-up gear and the transmission gear, and the hinges at both sides of the cross beam at the top of the rear door frame are provided with openings, which are used for avoiding the turning track of the hinges;

[0061] The transmission path of the rotating force is: tail plate turning over-follow-up gear-transmission gear-first belt gear-gear belt-second belt gear-output shaft-turning hinge-top frame; the power transmission is realized through the engagement of the transmission gear and the follow-up gear, the turning direction of the follow-up door is opposite to that of the tail plate, and the opening and closing of the follow-up door are realized at the same time;

[0062] The ratchet pawl mechanism 47 has the characteristics of one-way rotation and reverse locking; the ratchet wheel 471 is fixed on the input shaft, and the pawl 472 is fixed on the assembled compartment 46; the design position of the center of gravity of the pawl 472 determines that the pawl 472 and the ratchet wheel 471 are in the engaged position in the free state, which plays a role in locking the follow-up device and preventing the tail plate 11 from leaving the highest lifting point; when the follow-up gear 49 is separated from the transmission gear 48, the follow-up door 3 falls back due to gravity;

[0063] The gear width of the transmission gear 48 is less than the gear width of the tailgate 11, when the tailgate 11 is at the highest point of lifting, the transmission gear 48 is engaged with the transmission gear 49, the gear width of the transmission gear 49 is greater than the gear width of the transmission gear, the part of the transmission gear 49 with wide gear width is in contact with the lower part of the pawl 472 of the ratchet 471, the pawl 472 is turned up along the rotating shaft, so as to release the ratchet 471, at this time, the follower 4 rotates with the transmission gear 49.

[0064] In the specific embodiments of the present application, see Figures 1-19 , the transmission gear 48 and the transmission gear 49 have the same modulus and the same number of teeth, which ensures that the rotation angle of the tailgate 11 and the small door 3 is synchronous.

[0065] In the specific embodiments of the present application, see Figures 1-19 , the small door 3 includes a top frame 31, a door core 32 and a rain eave 33, the output shaft 42 is provided with a turnover hinge 421, the turnover hinge 421 is fixedly installed on the output shaft 42, the turnover hinge 421 and the output shaft 42 are arranged in the top beam of the rear door frame 3, the top frame 31 is connected with the turnover hinge 421, when the output shaft 42 rotates, the turnover hinge 421 is turned over, so as to realize the synchronous turnover of the top frame 31, the door core 32 and the rain eave 33, the door core 32 is installed on the top frame 31, and the rain eave 33 is installed on the lower part of the top frame 31 (referring to the side which is in butt joint with the tailgate in the closed state);

[0066] After the rain eave 33 is arranged, when the tailgate 11 and the small door 3 are closed, rainwater can be prevented from dropping into the inside of the rear door frame 3;

[0067] The top frame 31 is a rectangular tube, the door core 32 is a flat plate, and the rain eave 33 is a bending piece;

[0068] The left and right ends of the inner end beam of the top frame 31 are provided with connecting hole positions, a press rivet nut is assembled in the hole, and the connecting plate of the turnover hinge on the output shaft is connected.

[0069] In the specific embodiments of the present application, see Figures 1-19 , the left side column of the rear door frame 2 and the right side column of the rear door frame 2 are both provided with a first sealing strip 311, the first sealing strip 311 is connected with the front end face of the column of the rear door frame 2 through a clamping strip 312, after the tailgate 11 is closed, the first sealing strip 311 is compressed and surrounded in the middle of the tailgate 11 and the left and right columns of the rear door frame 2;

[0070] The clamping strip 312 is an omega-shaped thin steel plate;

[0071] The left side of the top frame 31, the right side of the top frame 31 and the upper side of the top frame 31 are clamped with a second sealing strip 313, after the closing of the follow-up small door 3, the second sealing strip 313 is extruded by the top frame 31 and the rear door frame 2 to realize the sealing of the connection between the follow-up small door 3 and the upper, left and right sides of the rear door frame 2.

[0072] The rain eave 33 is pasted with a third sealing strip 331, which seals the connection between the follow-up small door and the tail plate after the follow-up small door 3 is closed; the rain-proof function between the follow-up small door 3 and the rear door frame 2 is enhanced by the second sealing strip 331.

[0073] Among them, the inner end crossbeam is the crossbeam on one side of the top frame and the tail plate when closed, and the outer end crossbeam refers to the crossbeam on one side of the top frame and the rear door frame.

[0074] In the specific embodiments of the present application, see Figures 1-19 , the first sealing strip 311 is a double-lip structure, including a first lip 3111 and a second lip 3112, the length of the first lip is greater than that of the second lip, the first lip is located on the outer side, and the second lip is located on the inner side, the first lip is a turned-up lip, and the second lip is a compressed lip, the second lip is compressed after the tail plate is turned off, and at the same time, the first lip wraps the side of the tail plate from the outer side, realizing double sealing.

[0075] In the specific embodiments of the present application, see Figures 1-19 , the lifting mechanism 12 includes a rack 121, a lifting arm 122 and a power cylinder 123;

[0076] One end of the lifting arm 122 is hinged to the rack 121, and the other end is hinged to the bottom of the support seat 111;

[0077] One end of the power cylinder 123 is hinged to the rack 121, and the other end is hinged to the bottom of the support seat 111;

[0078] The power cylinder 123 is provided with one or more, specifically four;

[0079] The lifting mechanism 12 further includes a power device, which includes the above-mentioned power cylinder, hydraulic pump station or is replaced by an electric cylinder and a motor.

[0080] In the specific embodiments of the present application, see Figures 1-19The rack 121, the lifting arm 122 and the support seat 111 are integrally casted structures, no welding process is needed, high precision of size and consistency of products can be ensured; the integrally casted lifting arm integrates the lifting arm body and the welding ring, the rack and the lifting arm are integrally casted, no welding process is needed, the integrally casted rack integrates the lifting arm mounting plate, the power cylinder mounting plate, the turnover cylinder mounting plate and the rack beam, high precision of size and consistency of products can be ensured.

[0081] In the specific embodiments of the present application, see Figures 1-19 The technical scheme of the present application has the following advantages:

[0082] 1. The blank of the tail plate industry is filled, and the synchronous opening and closing of the tail plate and the follow-up small door is realized;

[0083] 2. The tail door in the original technology is replaced while the tail plate assembly is realized;

[0084] 3. The follow-up device is compact in structure and is arranged in the rear door frame, which is arranged in the built-in manner and invisible in appearance;

[0085] 4. The ratchet and pawl mechanism is arranged in the follow-up device, which has self-locking function and can prevent the follow-up small door from falling back;

[0086] 5. The first sealing strip is arranged on the left and right side of the rear door frame, which realizes double sealing between the tail plate and the rear door frame, has good sealing effect and no water leakage;

[0087] 6. The rack and the lifting arm support seat are integrally casted structures, which greatly reduces the number of components and avoids the defects of poor size precision and low coaxiality caused by welding.

[0088] The above only describes the preferred embodiments of the present application and should not be used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tailgate-replacing follow-up opening and closing cargo tailgate system, comprising: The tailboard assembly, the rear door frame and the following small door, the following small door is installed on the top of the rear door frame, the tailboard assembly includes tailboard and lifting mechanism, the lifting mechanism is installed on the bottom of the tailboard; It is characterized by: further comprising a following device, the following device is installed on the tailboard assembly and the rear door frame, the following small door is connected with the following device; The following device includes input shaft, output shaft, first belt gear, second belt gear, gear belt, assembly compartment, ratchet pawl mechanism, transmission gear and following gear; The input shaft is rotatably installed on the assembly compartment, and the first belt gear is sleeved on the input shaft; The output shaft is rotatably installed on the top of the rear door frame, and the second belt gear is sleeved on the output shaft; The gear belt is sleeved on the first belt gear and the second belt gear at the same time; The transmission gear and the ratchet pawl mechanism are both sleeved on the input shaft; The left and right sides of the bottom of the tailboard are both provided with support seats, the following gear is installed on the support seat, and the transmission gear is matched with the following gear; The following small door includes top frame, door core and rain eave, the output shaft is provided with a turnover hinge, the top frame is connected with the turnover hinge, the door core is installed on the top frame, and the rain eave is installed on the lower part of the top frame.

2. A tailgate-replacement follow-up opening and closing cargo deck system according to claim 1, characterized in that: The left side column of the rear door frame and the right side column of the rear door frame are provided with a first sealing strip, after the tailboard is closed, the first sealing strip is compressed and surrounded between the tailboard and the left and right side columns of the rear door frame; The first sealing strip is connected with the front end face of the column of the rear door frame through a clamping strip; The left side of the top frame, the right side of the top frame and the upper side of the top frame are all provided with a second sealing strip, after the following small door is closed, the second sealing strip is compressed between the top frame and the rear door frame to seal the connection between the following small door and the upper, left and right sides of the rear door frame; The rain eave is pasted with a third sealing strip, after the following small door is closed, the third sealing strip seals the connection between the following small door and the tailboard.

3. A tailgate-replacement follow-up opening and closing cargo deck system according to claim 2, characterized in that: The clamping strip is an Ω-shaped thin steel plate.

4. A tailgate-replacing follow-up opening and closing cargo tailboard system according to claim 2, characterized in that: The first sealing strip includes a first lip and a second lip, the length of the first lip is greater than the length of the second lip, the first lip is located on the outside, and the second lip is located on the inside, the first lip is a turned-up lip, and the second lip is a compressed lip.

5. A tailgate-replacing follow-up opening and closing cargo deck system according to claim 1, characterized in that: The transmission gear and the following gear have the same modulus and the same number of teeth.

6. A tailgate-replacing follow-up opening and closing cargo deck system according to claim 1, characterized in that: The gear width of the transmission gear is less than the gear width of the following gear of the tailboard.

7. A tailgate-replacing follow-up opening and closing cargo deck system according to claim 1, characterized in that: The lifting mechanism includes a rack, a lifting arm and a power cylinder; One end of the lifting arm is hinged to the rack, and the other end is hinged to the bottom of the tailboard; One end of the power cylinder is hinged to the rack, and the other end is hinged to the bottom of the tailboard; The power cylinder is provided with one or more.

8. A tailgate-replacement follow-up opening and closing cargo deck system according to claim 7, characterized in that: The rack, the lifting arm and the support seat are integrally cast structures.

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