Tailgate for a vehicle with a separate door cylinder

Abstract

The application relates to the technical field of automobile tailgates, and discloses an automobile tailgate applied to a single door closing cylinder, which comprises a main beam, a lifting cylinder for driving a tailgate body to lift and lower, a follow-up arm for swinging along with the lifting cylinder, a lifting beam for driving the tailgate body to lower or lift along with the swinging of the follow-up arm, a fixed beam for connecting the main beam and the tailgate body, a lifting arm on the outer end of the fixed beam for lifting the tailgate body, a door closing cylinder on the fixed beam for driving the tailgate body to close or open, and a tailgate mounting part connected with the driving end of the door closing cylinder for driving the tailgate body to close or open; the door closing cylinder and the fixed beam can be used to separately drive the tailgate body to open or close; the lifting cylinder can drive the lifting beam to control the tailgate body to lower or lift through the follow-up arm, thereby solving the problem of reducing the stress requirement of the door closing cylinder; and the lifting arm can prevent the automobile tailgate from being inclined downward or overturned during the process of opening and lowering.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile tailgates, in particular to an automobile tailgate applied to a single door closing cylinder. BACKGROUND

[0002] The automobile tailgate is also called automobile lifting tailgate, automobile loading and unloading tailgate, lifting tailgate, hydraulic automobile tailgate and truck tailgate, which is a kind of hydraulic lifting loading and unloading equipment installed at the tail of a truck and various vehicles and powered by a vehicle-mounted battery.

[0003] The traditional automobile tailgate realizes the "lifting head" or "lowering head" action through a booster cylinder and a door closing cylinder, but the dynamic load required by the door closing cylinder at this time is obviously greater than the load required when the door closing cylinder opens and closes the door, which increases the power, weight and stress demand of the door closing cylinder, and the use of the booster cylinder increases the weight of the tailgate, the complexity of the hydraulic circuit, the pipe joint and the risk of oil leakage. SUMMARY

[0004] The purpose of the present application is to provide an automobile tailgate applied to a single door closing cylinder, aiming to solve the problem of reducing the stress demand of the door closing cylinder in the prior art.

[0005] The present application is realized as follows: the automobile tailgate applied to a single door closing cylinder comprises a main beam, a lifting cylinder for driving the lifting of the tailgate body and a follow-up arm that swings with the pushing and pulling of the lifting cylinder, a lifting beam for driving the tailgate body to be lowered or lifted is installed on the follow-up arm, the inner end of the lifting beam is hingedly connected with the follow-up arm, the outer end of the lifting beam is hingedly connected with the lifting cylinder, the lifting cylinder is located above the lifting beam, the driving end of the lifting cylinder is hingedly connected with the outer end of the lifting beam, the mounting end of the lifting cylinder is hingedly connected to the bottom of the follow-up arm, the main beam and the tailgate body are connected through a fixed beam, the inner end of the fixed beam is hingedly connected with the main beam, a lifting arm for lifting the tailgate body is arranged on the outer end of the fixed beam, and the lifting arm is movably connected with the tailgate body; a door closing cylinder for driving the closing or opening of the tailgate body is connected to the fixed beam, and the door closing cylinder is located between the fixed beam and the lifting beam.

[0006] The driving end of the door closing cylinder is connected with a tailgate mounting portion for driving the closing or opening of the tailgate body, the tailgate mounting portion and the tailgate body are integrated, and the outer end of the lifting beam is hingedly connected with the tailgate mounting portion.

[0007] When the lifting cylinder drives the tailgate body to descend to the ground, the tailgate body is arranged in a horizontal lifting head, and when the driving end of the lifting cylinder continues to contract, the bottom of the follow-up arm swings away from the main beam, so that the follow-up arm drives the lifting beam to control the lowering of the tailgate body.

[0008] Further, a lower fixing base is mounted on the main beam, the inner end of the fixing beam is hingedly connected in the lower fixing base, the outer end of the fixing beam is hingedly connected with the bottom of the lifting arm through a first pin shaft, and the top of the lifting arm is connected with the tail plate mounting part.

[0009] Further, the bottom of the lifting arm has an outer section extending towards the lower side of the tail plate body, the outer section is provided with a tail plate lifting block for lifting the tail plate body, and the tail plate lifting block is movably abutted with the bottom of the tail plate body.

[0010] Further, the tail plate mounting part comprises two rotating plates and a closing door plate, the bottom of the closing door plate is hingedly connected with the driving end of the closing door cylinder, the closing door plate is located between the two rotating plates, and the closing door plate and the two rotating plates have two interval arrangements therebetween, the two intervals form an inner interval region and an outer interval region, the outer end of the lifting beam is located in the inner interval region, the tail plate lifting block is located in the outer interval region, and the two rotating plates, the outer end top of the lifting beam, the top of the closing door plate and the top of the lifting arm are connected through a second pin shaft.

[0011] Further, the bottom of the tail plate body is provided with a support plate arranged towards the tail plate lifting block;

[0012] When the tail plate body is in the door opening state, the support plate is abutted on the tail plate lifting block;

[0013] When the tail plate body is in the door closing state, the support plate is arranged separately from the tail plate lifting block.

[0014] Further, the follow-up arm and the main beam are connected through an upper fixing base, the bottom of the upper fixing base is fixed on the main beam, the top of the upper fixing base is hingedly connected with the top of the follow-up arm, the follow-up arm is located between the tail plate body and the main beam, the main beam and the follow-up arm have a gap for the follow-up arm to swing, the inner end of the lifting beam is mounted on the middle part of the follow-up arm, the inner end of the lifting beam is movably abutted on the outer side of the upper fixing base, and the outer end bottom of the lifting beam is hingedly connected with the driving end of the lifting cylinder.

[0015] Further, a hinged arm is mounted on the fixing beam, the hinged arm is located between the fixing beam and the lifting beam, the mounting end of the closing door cylinder is hingedly connected with the hinged arm, the inner end of the fixing beam is connected with the lower fixing base through a fourth pin shaft, and the inner end of the fixing beam and the main beam have a rotating interval therebetween.

[0016] Further, the lifting beam and the lifting cylinder are longitudinally arranged.

[0017] Further, the tail plate body is provided with a positioning plate limiting the moving range of the loading and unloading articles on the tail plate body, the bottom of the positioning plate is embedded in the tail plate body from top to bottom, the top of the positioning plate is exposed on the tail plate body, the tail plate body is provided with a power rod driving the positioning plate to move up and down, the power rod is engaged with the positioning plate through a linkage gear, and the power rod and the positioning plate are arranged in relative spacing, the outer side of the positioning plate is provided with a gear groove engaged with the linkage gear, the power rod is provided with a gear strip engaged with the linkage gear, and the gear strip and the gear groove of the positioning plate are connected through the linkage gear transmission;

[0018] The bottom of the power rod is exposed below the bottom of the tail plate body, the top of the power rod is provided with an elastic strip driving the power rod to move outward away from the tail plate body, the bottom of the elastic strip is sleeved on the power rod, and the top of the elastic strip abuts against in the tail plate body;

[0019] When the tail plate body is in the head-up state, the tail plate body is horizontally arranged, the power rod and the ground are arranged in spacing, the positioning plate is vertically exposed outside the tail plate body, and the power rod is vertically exposed outside the tail plate body;

[0020] When the tail plate body is in the head-down state, the tail plate body is arranged in an inclined manner, the power rod is driven to retract into the tail plate body after being resisted by the ground, and the positioning plate is driven to retract into the tail plate body.

[0021] Further, the tail plate body has a tail plate surface arranged upwardly, the tail plate surface is provided with a mounting groove opening upwardly away from the tail plate mounting portion, and the outer side wall of the positioning plate is slidingly mounted on the inner side wall of the mounting groove;

[0022] The positioning plate has an abutting end face facing the tail plate mounting portion, a plurality of buffer strips are arranged on the abutting end face in spacing along the length direction of the positioning plate, a plurality of rolling balls are arranged in rotation between adjacent buffer strips, the inner side of the rolling ball is embedded in the abutting end face, and the outer side of the rolling ball is exposed outside the abutting end face;

[0023] When the tail plate body is in the head-up state, the positioning plate is vertically abutted on the inner side wall of the mounting groove, and the positioning plate is vertically exposed outside the tail plate body;

[0024] When the tail plate body is in the head-down state, the bottom of the positioning plate is abutted on the bottom of the mounting groove, and the top of the positioning plate is arranged in flush with the top opening of the mounting groove.

[0025] Compared with the prior art, the automobile tailboard applied to the single door closing cylinder provided by the application can be driven to open or close by the door closing cylinder cooperating with the fixed beam; the lifting cylinder can drive the lifting beam to control the tailboard body to lift or lower through the follow-up arm, thereby solving the problem of reducing the stress requirement of the door closing cylinder; and the lifting arm can prevent the automobile tailboard from tilting or overturning during the process of opening and lowering. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a perspective view of the automobile tailboard applied to the single door closing cylinder provided by the application;

[0027] Figure 2 is a structural view of the automobile tailboard applied to the single door closing cylinder provided by the application;

[0028] Figure 3 is a door closing state view of the automobile tailboard applied to the single door closing cylinder provided by the application;

[0029] Figure 4 is a head lifting state view of the automobile tailboard applied to the single door closing cylinder provided by the application;

[0030] Figure 5 is a head lowering state view of the automobile tailboard applied to the single door closing cylinder provided by the application;

[0031] Figure 6 is a perspective view of the door closing cylinder, the fixed beam and the lifting arm provided by the application;

[0032] Figure 7 is a perspective view of the tailboard body provided by the application;

[0033] Figure 8 is a partial cutaway structural view of the tailboard body provided by the application;

[0034] Figure 9 is a structural view of the positioning plate provided by the application.

[0035] In the figure: main beam 100, tail plate body 200, lifting cylinder 300, follow-up arm 400, door closing cylinder 500, lifting beam 600, fixed beam 700, tail plate mounting portion 800, lifting arm 900, lower fixed seat 101, upper fixed seat 102, third pin shaft 103, fourth pin shaft 104, second pin shaft 201, support plate 202, positioning plate 203, power rod 204, linkage gear 205, gear groove 206, gear strip 207, elastic strip 208, tail plate surface 209, mounting groove 210, abutting end face 211, buffer strip 212, ball 213, first pin shaft 701, hinged arm 702, rotating plate 801, door closing plate 802, inner interval area 803, outer interval area 804, outer section 901, tail plate lifting block 902. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0037] The implementation of the present application is described in detail below in combination with specific embodiments.

[0038] In the drawings of the embodiments, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration and cannot be understood as a limitation on the present application, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0039] Referring to Figures 1-9 The preferred embodiments provided by the present application are shown in the figure.

[0040] The automobile tailgate applied to the separate door closing cylinder 500 comprises a main beam 100, a lifting cylinder 300 driving the tailgate body 200 to lift, a follower arm 400 swinging with the pushing and pulling of the lifting cylinder 300, a lifting beam 600 installed on the follower arm 400 and driving the tailgate body 200 to lower or lift with the swinging of the follower arm 400, the inner end of the lifting beam 600 being hingedly connected with the follower arm 400, the outer end of the lifting beam 600 being hingedly connected with the lifting cylinder 300, the lifting beam 600 being located above the lifting cylinder 300, the driving end of the lifting cylinder 300 being hingedly connected with the outer end of the lifting beam 600, the mounting end of the lifting cylinder 300 being hingedly connected in the bottom of the follower arm 400, the main beam 100 and the tailgate body 200 being connected through a fixed beam 700, the inner end of the fixed beam 700 being hingedly connected with the main beam 100, the outer end of the fixed beam 700 being provided with a lifting arm 900 lifting the tailgate body 200, the lifting arm 900 being movably connected with the tailgate body 200, the fixed beam 700 being connected with a door closing cylinder 500 driving the tailgate body 200 to close or open, the door closing cylinder 500 being located between the fixed beam 700 and the lifting beam 600.

[0041] The driving end of the door closing cylinder 500 is connected with a tailgate mounting part 800 driving the tailgate body 200 to close or open, the tailgate mounting part 800 being an integrated structure with the tailgate body 200, the outer end of the lifting beam 600 being hingedly connected with the tailgate mounting part 800.

[0042] When the lifting cylinder 300 drives the tailgate body 200 to descend to the ground, the tailgate body 200 is arranged in a horizontal and lifted state, the driving end of the lifting cylinder 300 continues to contract, and the bottom of the follower arm 400 swings away from the main beam 100 to drive the follower arm 400 to control the lifting beam 600 to lower the tailgate body 200.

[0043] The automobile tailgate applied to the separate door closing cylinder 500 provided above can drive the tailgate body 200 to open or close through the cooperation of the door closing cylinder 500 and the fixed beam 700, the lifting cylinder 300 can drive the lifting beam 600 to control the tailgate body 200 to lift or lower through the follower arm 400, the problem of reducing the force requirement of the door closing cylinder 500 is solved, and the automobile tailgate will not tilt or overturn in the process of opening and descending through the lifting arm 900.

[0044] The door closing cylinder 500 and the fixed beam 700 are used to replace the booster cylinder, so as to reduce the power, strength and weight requirements of the door closing cylinder 500, avoid increasing the weight of the tailgate, the complexity of the hydraulic circuit, the pipe joints and the risk of oil leakage.

[0045] The door closing cylinder 500 and the lifting cylinder 300 can be hydraulic cylinders or electric push rods.

[0046] In the embodiment, the main beam 100 is provided with a lower fixing base 101, the inner end of the fixing beam 700 is hingedly connected in the lower fixing base 101, the outer end of the fixing beam 700 is hingedly connected with the bottom of the lifting arm 900 through the first pin shaft 701, and the top of the lifting arm 900 is connected with the tail plate mounting part 800.

[0047] The main beam 100 can facilitate the installation and disassembly and maintenance of the fixing beam 700 through the lower fixing base 101, the lifting arm 900 is stably supported on the tail plate body 200 through the connection with the tail plate mounting part 800, and the fixing beam 700 can stably descend or lift along with the driving of the lifting cylinder 300 while supporting the tail plate body 200 through the lifting arm 900.

[0048] In the embodiment, the bottom of the lifting arm 900 is provided with an outer section 901 extending towards the lower side of the tail plate body 200, the outer section 901 is provided with a tail plate lifting block 902 lifting the tail plate body 200, and the tail plate lifting block 902 movably abuts against the bottom of the tail plate body 200.

[0049] The lifting arm 900 stably lifts the bottom of the tail plate body 200 through the tail plate lifting block 902 on the outer section 901, so that the tail plate body 200 does not tilt downward or overturn during the door opening and descending process, and the tail plate lifting block 902 can also buffer and protect the bottom of the tail plate body 200.

[0050] In the embodiment, the tail plate mounting part 800 includes two rotating plates 801 and a closing door plate 802, the bottom of the closing door plate 802 is hingedly connected with the driving end of the closing door cylinder 500, the closing door plate 802 is located between the two rotating plates 801, and the closing door plate 802 has two spaced arrangements with the two rotating plates 801, the two spaced arrangements form an inner spacing region 803 and an outer spacing region 804, the outer end of the lifting beam 600 is located in the inner spacing region 803, the tail plate lifting block 902 is located in the outer spacing region 804, and the two rotating plates 801, the outer end top of the lifting beam 600, the top of the closing door plate 802 and the top of the lifting arm 900 are connected through the second pin shaft 201.

[0051] When the tail plate body 200 contacts the tail plate lifting block 902 of the lifting arm 900, the two are relatively stationary, however, during the lifting and descending process of the tail plate body 200, the lifting beam 600 rotates relative to the lifting arm 900 around the second pin shaft 201, and the fixing beam 700 rotates relative to the lifting arm 900 around the first pin shaft 701; the mounting end of the closing door cylinder 500 is hingedly connected on the fixing beam 700, the driving end of the closing door cylinder 500 is connected with the closing door plate 802 through the fifth pin shaft, and when the tail plate body 200 is in the door opening state, the fifth pin shaft and the first pin shaft 701 are coaxial points that can ensure that the length of the closing door mechanism does not change during the lifting and descending process of the tail plate body 200.

[0052] The inner end of the lifting beam 600 is connected with the follower arm 400 through the sixth pin shaft;

[0053] When the tail plate body 200 is not in the process and state of the low head and the raised head, the sixth pin shaft, the fourth pin shaft 104, the first pin shaft 701 and the second pin shaft 201 form a parallelogram with four points, which can ensure that the angle of the tail plate body 200 relative to the follower arm 400 is unchanged during the lifting and lowering process, and the tail plate is lifted and lowered by the extension and contraction of the lifting cylinder 300 to drive the rotation of the lifting beam 600.

[0054] The bottom of the tail plate body 200 is provided with a support plate 202 arranged towards the tail plate lifting block 902; in this way, when the support plate 202 of the tail plate body 200 is in contact with the tail plate lifting block 902 of the lifting arm 900, the two are relatively stationary, which can better support the lifting and lowering of the tail plate body 200, and also can buffer and protect the bottom of the tail plate body 200.

[0055] When the tail plate body 200 is in the door opening state, the support plate 202 is abutted on the tail plate lifting block 902;

[0056] When the tail plate body 200 is in the door closing state, the support plate 202 is arranged separately from the tail plate lifting block 902.

[0057] In the embodiment, the follower arm 400 is connected with the main beam 100 through the upper fixing seat 102, the bottom of the upper fixing seat 102 is fixed on the main beam 100, the top of the upper fixing seat 102 is hingedly connected with the top of the follower arm 400 through the third pin shaft 103, the follower arm 400 is located between the tail plate body 200 and the main beam 100, and the main beam 100 and the follower arm 400 have a gap for the swinging of the follower arm 400, the inner end of the lifting beam 600 is installed at the middle part of the follower arm 400, and the inner end of the lifting beam 600 is movably abutted on the outer side of the upper fixing seat 102, and the outer end of the lifting beam 600 is hingedly connected with the driving end of the lifting cylinder 300.

[0058] Through the positional relationship between the upper fixing seat 102 and the main beam 100, the swinging distance of the follower arm 400 can be limited, and the upper fixing seat 102 is movably abutted on the inner end of the lifting beam 600, so as to increase the stability of the lifting beam 600 when rotating on the follower arm 400.

[0059] In the embodiment, the fixed beam 700 is provided with a hinged arm 702, which is located between the fixed beam 700 and the lifting beam 600, and the mounting end of the door closing cylinder 500 is hingedly connected with the hinged arm 702; the inner end of the fixed beam 700 is connected with the lower fixed seat 101 through the fourth pin shaft 104, and the inner end of the fixed beam 700 is provided with a rotating interval with the main beam 100; in this way, the mounting end of the door closing cylinder 500 can rotate around the hinged arm 702 during work, so as to avoid the door closing cylinder 500 from being stuck during the work of the tail plate body 200; during the lifting and lowering of the tail plate body 200, the inner end of the fixed beam 700 can rotate around the fourth pin shaft 104, so as to avoid the fixed beam 700 from being stuck.

[0060] The lifting beam 600 and the lifting cylinder 300 are longitudinally arranged; in this way, the lifting beam 600, the lifting cylinder 300 and the follower arm 400 form a triangle, so as to increase the stability during the work of the lifting cylinder 300.

[0061] In the embodiment, the tail plate body 200 is provided with a positioning plate 203 for limiting the moving range of the loaded and unloaded articles on the tail plate body 200; the bottom of the positioning plate 203 is embedded in the tail plate body 200 from top to bottom, and the top of the positioning plate 203 is exposed on the tail plate body 200; the tail plate body 200 is provided with a power rod 204 for driving the positioning plate 203 to move up and down; the power rod 204 is engaged with the positioning plate 203 through a linkage gear 205, and the power rod 204 and the positioning plate 203 are arranged at a relative interval; the outer side of the positioning plate 203 is provided with a gear groove 206 engaged with the linkage gear 205; the power rod 204 is provided with a gear strip 207 engaged with the linkage gear 205; the gear strip 207 and the gear groove 206 of the positioning plate 203 are drivingly connected through the linkage gear 205.

[0062] The bottom of the power rod 204 is exposed below the bottom of the tail plate body 200, and the top of the power rod 204 is provided with an elastic strip 208 for driving the power rod 204 to move outward away from the tail plate body 200; the bottom of the elastic strip 208 is sleeved on the power rod 204, and the top of the elastic strip 208 abuts against the tail plate body 200.

[0063] When the tail plate body 200 is in a lifted state, the tail plate body 200 is horizontally arranged, and the power rod 204 and the ground are arranged at an interval; the positioning plate 203 is vertically exposed outside the tail plate body 200, and the power rod 204 is vertically exposed outside the tail plate body 200.

[0064] When the tail plate body 200 is in a lowered state, the tail plate body 200 is obliquely arranged; after the power rod 204 is resisted by the ground, the power rod 204 is retracted into the tail plate body 200, and drives the positioning plate 203 to be retracted into the tail plate body 200.

[0065] The tail plate body 200 limits the moving range of the loading and unloading articles on the tail plate body 200 through the positioning plate 203, so as to prevent the loading and unloading articles from falling off in the lifting and lowering process of the tail plate body 200 after the loading and unloading articles are moved to the tail plate body 200, thereby causing damage to the loading and unloading articles or safety problems of the workers;

[0066] When the tail plate body 200 is in the lifted head state, the positioning plate 203 limits the moving range of the loading and unloading articles on the tail plate body 200;

[0067] When the tail plate body 200 is in the process of lowering the head state, after the power rod 204 is resisted by the ground, in the process of the power rod 204 retracting into the tail plate body 200, the power rod 204 drives the gear strip 207 to rotate the linkage gear 205, and the linkage gear 205 controls the gear groove 206 to drive the positioning plate 203 to retract into the tail plate body 200, so that the loading and unloading articles are no longer limited by the positioning plate 203, and the loading and unloading articles can be smoothly unloaded.

[0068] In the embodiment, the tail plate body 200 has a tail plate surface 209 arranged upward, the tail plate surface 209 is provided with a mounting groove 210 which is open at the top and faces away from the tail plate mounting portion 800, and the outer side wall of the positioning plate 203 is slidingly mounted on the inner side wall of the mounting groove 210;

[0069] The positioning plate 203 has an abutting end face 211 facing the tail plate mounting portion 800, the abutting end face 211 is provided with a plurality of buffer strips 212, the plurality of buffer strips 212 are arranged at intervals along the length direction of the positioning plate 203, adjacent buffer strips 212 are provided with a rotatingly arranged ball 213, the inner side of the ball 213 is embedded in the abutting end face 211, and the outer side of the ball 213 is exposed outside the abutting end face 211;

[0070] When the tail plate body 200 is in the lifted head state, the positioning plate 203 is vertically abutted on the inner side wall of the mounting groove 210, and the positioning plate 203 is vertically exposed outside the tail plate body 200;

[0071] When the tail plate body 200 is in the lowered head state, the bottom of the positioning plate 203 is abutted on the bottom of the mounting groove 210, and the top of the positioning plate 203 is arranged flush with the top opening of the mounting groove 210.

[0072] The tail plate body 200 provides the positioning plate 203 with the mounting groove 210 for extension and retraction, the positioning plate 203 protects the loading and unloading articles in the moving process by using the plurality of buffer strips 212, and the ball 213 is abutted on the outer side of the loading and unloading articles, so that the positioning plate 203 can reduce the frictional resistance in the process of retracting into the mounting groove 210, and the positioning plate 203 can smoothly retract into the mounting groove 210.

[0073] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tailgate for a vehicle incorporating a single door cylinder, characterised in that, The lifting cylinder includes a main beam and a driving tail plate body lifting, and a follow-up arm swinging with the pushing and pulling of the lifting cylinder, the follow-up arm is installed with a lifting beam driving the tail plate body to be lowered or raised with the swinging of the follow-up arm, the inner end of the lifting beam is hingedly connected with the follow-up arm, the outer end of the lifting beam is hingedly connected with the lifting cylinder, and the lifting beam is above the lifting cylinder, the driving end of the lifting cylinder is hingedly connected with the outer end of the lifting beam, the mounting end of the lifting cylinder is hingedly connected in the bottom of the follow-up arm, the main beam is connected with the tail plate body through a fixed beam, the inner end of the fixed beam is hingedly connected with the main beam, the outer end of the fixed beam is provided with a lifting arm lifting the tail plate body, and the lifting arm is movably connected with the tail plate body; the fixed beam is connected with a door closing cylinder driving the tail plate body to be closed or opened, and the door closing cylinder is between the fixed beam and the lifting beam; The driving end of the door closing cylinder is connected with a tail plate mounting part driving the tail plate body to be closed or opened, the tail plate mounting part is an integrated structure with the tail plate body, and the outer end of the lifting beam is hingedly connected with the tail plate mounting part. When the lifting cylinder drives the tail plate body to be lowered to the ground, the tail plate body is horizontally and raised, the driving end of the lifting cylinder continues to be contracted, the bottom of the follow-up arm swings away from the main beam, so that the follow-up arm drives the lifting beam to control the tail plate body to be lowered. The tail plate body is provided with a positioning plate limiting the moving range of loading and unloading articles on the tail plate body, the bottom of the positioning plate is embedded in the tail plate body from top to bottom, the top of the positioning plate is exposed on the tail plate body, the tail plate body is provided with a power rod driving the positioning plate to be telescopically moved up and down, the power rod is engaged with the positioning plate through a linkage gear, and the power rod and the positioning plate are relatively spaced apart, the outer side of the positioning plate is provided with a gear groove engaged with the linkage gear, the power rod is provided with a gear strip engaged with the linkage gear, and the gear strip and the gear groove of the positioning plate are drivingly connected through the linkage gear. The bottom of the power rod is exposed below the bottom of the tail plate body, the top of the power rod is provided with an elastic strip driving the power rod to move outward away from the tail plate body, the bottom of the elastic strip is sleeved on the power rod, and the top of the elastic strip abuts against the tail plate body. When the tail plate body is in the raised state, the tail plate body is horizontally arranged, and the power rod and the ground are spaced apart, the positioning plate is vertically exposed outside the tail plate body, and the power rod is vertically exposed outside the tail plate body. When the tail plate body is in the lowered state, the tail plate body is arranged in an inclined manner, the power rod is retracted into the tail plate body after being resisted by the ground, and drives the positioning plate to be retracted into the tail plate body.

2. The tailgate for a single-door pickup truck of claim 1, wherein, The main beam is installed with a lower fixing seat, the inner end of the fixed beam is hingedly connected in the lower fixing seat, the outer end of the fixed beam is hingedly connected with the bottom of the lifting arm through a first pin shaft, and the top of the lifting arm is connected with the tail plate mounting part.

3. The tailgate for a single-door pickup truck of claim 2, wherein, The bottom of the lifting arm has an outer section extending towards the lower part of the tail plate body, the outer section is provided with a tail plate lifting block lifting the tail plate body, and the tail plate lifting block is movably abutted with the bottom of the tail plate body.

4. The tailgate for a single-door pickup truck of claim 3, wherein, The tail plate mounting part comprises two rotating plates and a door closing plate, the bottom of the door closing plate is hingedly connected with the driving end of the door closing cylinder, and the door closing plate is located between the two rotating plates, and the door closing plate and the two rotating plates are spaced apart to form an inner spacing area and an outer spacing area, the outer end of the lifting beam is located in the inner spacing area, and the tail plate lifting block is located in the outer spacing area, and the two rotating plates, the top of the outer end of the lifting beam, the top of the door closing plate and the top of the lifting arm are connected through the second pin shaft.

5. The vehicle tailgate of claim 4, wherein, The bottom of the tail plate body is provided with a support plate arranged towards the tail plate lifting block; When the tail plate body is in the open door state, the support plate abuts against the tail plate lifting block; When the tail plate body is in the closed door state, the support plate is arranged separately from the tail plate lifting block.

6. The tailgate for a single-door pickup truck of claim 4, wherein, The upper fixing seat is fixed on the main beam, the top of the upper fixing seat is hingedly connected with the top of the follow-up arm, the follow-up arm is located between the tail plate body and the main beam, the main beam and the follow-up arm have a gap for the follow-up arm to swing, the inner end of the lifting beam is mounted on the middle part of the follow-up arm, and the inner end of the lifting beam movably abuts against the outside of the upper fixing seat, and the bottom of the outer end of the lifting beam is hingedly connected with the driving end of the lifting cylinder.

7. The vehicle tailgate of claim 6, wherein, The fixed beam is provided with a hinged arm located between the fixed beam and the lifting beam, and the mounting end of the door closing cylinder is hingedly connected with the hinged arm; the inner end of the fixed beam is connected with the lower fixing seat through the fourth pin shaft, and the inner end of the fixed beam and the main beam have a rotating interval.

8. The tailgate for a single-door pickup truck of any one of claims 1 to 7, wherein, The lifting beam and the lifting cylinder are longitudinally arranged.

9. The tailgate for a single-door pickup truck of any one of claims 1 to 7, wherein, The tail plate body has a tail plate plate surface arranged upwards, the tail plate plate surface is provided with a mounting groove with an open top away from the tail plate mounting part, and the outer side wall of the positioning plate is slidably mounted on the inner side wall of the mounting groove. The positioning plate has an abutting end face towards the tail plate mounting part, the abutting end face is provided with a plurality of buffer strips, the plurality of buffer strips are spaced apart along the length direction of the positioning plate, adjacent buffer strips are provided with rolling balls in rotating arrangement, the inner side of the rolling balls is embedded in the abutting end face, and the outer side of the rolling balls is exposed outside the abutting end face. When the tail plate body is in the lifted head state, the positioning plate is vertically abutted against the inner side wall of the mounting groove, and the positioning plate is vertically exposed outside the tail plate body; When the tail plate body is in the lowered head state, the bottom of the positioning plate is abutted against the bottom of the mounting groove, and the top of the positioning plate is arranged flush with the top opening of the mounting groove.

Images