Supporting device of anti-abrasion opening and closing piece binding piece feeding table

Abstract

The utility model relates to the technical field of automobile auxiliary manufacturing clamps, in particular to an anti-abrasion opening and closing piece binding feeding table supporting device which comprises a connecting base, a swing arm, a connecting piece, a guiding piece and an air cylinder. The connecting base is rotationally connected with the swing arm, the swing arm is rotationally connected with one end of the connecting piece, and the other end of the connecting piece is rotationally connected with the guiding piece. The guide piece is fixedly connected with the top end of a piston rod of the air cylinder, the air cylinder is fixedly connected with the bottom face of the connecting base, and the protruding part is arranged on the side face, close to the second rotating center, of the swing arm and located above the third rotating center and makes contact with the connecting piece in the supporting state. According to the utility model, the limit failure caused by abrasion of the contact surface of the swing arm and the rotating center of the connecting piece can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile auxiliary manufacturing fixtures, and more specifically to a wear-resistant opening and closing part rolling and loading platform support device. Background Art

[0002] Rolling hemming of automotive openings and closing parts refers to the processing and treatment of their edges during automotive manufacturing. This process primarily involves curling and pressing the edges to create a smoother, more aesthetically pleasing edge. This improves the vehicle's structural strength and safety, eliminates sharp angles, and increases edge strength to enhance overall stability. Openings and closing parts specifically include doors, hoods, trunk lids, and sunroofs. During the mechanical rolling process, a loading platform support device is required to secure the openings and closing parts.

[0003] At present, in the support device of the hemming loading platform in the factory or workshop, the support block of the opening and closing parts is made of nylon, and the precision guide is made of steel. The support block is installed as a whole on the loading platform mounting seat. According to the position of different models, the cylinder is used to flip the swing arm to adjust the extension and retraction of the support block of different models. After half a year of production use, due to the extension of the working position, the retraction of the rest position, and the impact force when installing the workpiece, the contact point of the rotation center between the swing arm and the connecting part is worn. As a result, when the upward force of the support cylinder is transmitted to the connecting part, due to the wear of the rotation center of the swing arm and the connecting part, relative slip occurs between the two, and the force cannot be transmitted to the support block. Under the influence of the gravity of the opening and closing parts and other external forces, the support block swings up and down and left and right, losing its limit function, resulting in poor precision and sheet metal defects on the four doors and two covers after the hemming is put into operation.

[0004] The prior art discloses a common type of opening and closing part rolling edge upper part positioning fixture for multiple vehicle models, which includes a frame, a base plate, a corner seat and a support positioning unit; and the support unit includes a connecting seat, a swing arm, a support block, a connecting rod, a blocking block and a cylinder, the base plate is tilted on the frame, and at least one corner seat is respectively installed on the left side, the right side, the bottom side and the middle side of the base plate, and at least one supporting positioning unit is installed on the corner seat, and the supporting positioning unit is divided into a supporting unit for supporting the middle part of the opening and closing part and a limiting supporting unit for supporting and positioning the edge of the opening and closing part according to the RPS point position of the opening and closing part, which solves the problem that the vehicle model upper part positioning fixture is difficult to share, the switching efficiency is low, and the precision stability is low. However, in actual long-term use, the rotation center of the swing arm and the connecting part will wear, and relative slip will occur between the two. The support block is affected by the gravity of the opening and closing part and other external forces and is in a state of shaking up and down, losing its limiting function, so that the precision of the four doors and two covers is poor after the opening and closing part rolling edge is put into use. Utility Model Content

[0005] The purpose of this utility model is to overcome the problem of poor limiting accuracy caused by wear of the swing arm and the rotation center of the connecting part in the existing technology of the opening and closing part rolling and loading platform support device, and to provide a wear-resistant rolling and loading platform support device that can effectively avoid the limiting failure caused by wear of the contact surface at the rotation center of the swing arm and the connecting part.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A support device for a wear-resistant opening and closing part rolling platform is provided, comprising a connecting seat, a swing arm, a connecting part, a guide part, and a cylinder. The connecting seat is rotatably connected to the swing arm, and its rotation center is a first rotation center. The swing arm is rotatably connected to one end of the connecting part, and its rotation center is a second rotation center. The other end of the connecting part is rotatably connected to the guide part, and its rotation center is a third rotation center. The guide part is fixedly connected to the top end of the piston rod of the cylinder, and the cylinder is fixedly connected to the bottom surface of the connecting seat. It also includes a raised portion arranged on the side of the swing arm close to the second rotation center. In the supported state, the raised portion is located above the third rotation center and in contact with the connecting part.

[0008] During the working process of the above scheme: first, install the connecting seat on the external loading platform, and check and confirm the stability of the entire support device, then start the external air pressure equipment to pressurize and inflate the cylinder, the gas entering the cylinder pushes the piston to make the entire piston rod rise, thereby driving the entire guide part to move upward, the guide part pushes the connecting part upward to rise and the second rotation center and the third rotation center to rotate, thereby driving the first rotation center to rotate and make the entire swing arm rotate to the support position, the bottom surface of the swing arm collides with the top surface of the connecting seat to prevent the swing arm from continuing to rotate, the swing arm enters the support state, and continues to apply pressure to make the bottom surface of the swing arm fit tightly with the top surface of the connecting seat to lock the entire swing arm, at this time move the opening and closing part to the upper platform support device The support starts from the swing arm. After long-term use, surface wear will occur on the four side surfaces that contact each other at the contact point between the connecting part and the swing arm at the second rotation center. When the force of the cylinder's piston pushing upward or the opening and closing part pressing downward is transmitted to the second rotation center during the rolling process of the opening and closing part, the second rotation center generally begins to swing up and down due to insufficient friction. However, since the raised part contacts the surface of the connecting part, when the force of the cylinder's piston pushing upward or the opening and closing part pressing downward is transmitted to the second rotation center, the raised part can block the shaking movement caused by wear of the joint surface between the connecting part and the swing arm, and stably transmit the force of the cylinder to the swing arm, thereby achieving the effect of avoiding failure of the limit support.

[0009] Furthermore, it also includes a first blocking block and a second blocking block, the first blocking block is located on the bottom surface of the swing arm close to the first rotation center, and the second blocking block is located on the top surface of the connecting seat close to the first rotation center; during the rotation of the first rotation center, when the swing arm moves to the supporting state, the bottom surface of the swing arm needs to contact the top surface of the connecting seat to prevent the swing arm from continuing to rotate, and a certain clamping force is required between the two contact surfaces to lock the swing arm, and the first blocking block and the second blocking block are set to bear force here. The material of the blocking block is pressure-resistant and wear-resistant material, generally vermicular graphite cast iron, which can effectively withstand pressure to avoid the joint surface from collapsing and improve durability.

[0010] Furthermore, it also includes a guide rail part, one end of which is fixedly connected to the connecting seat, and the other end is slidably connected to the guide part; the guide rail part cooperates with the guide part. Since the piston rod of the cylinder does not move completely vertically up and down during the up and down movement, it will shake. Therefore, the guide part and the guide rail part are provided to correct the movement of the piston rod so that it can move stably up and down in the vertical direction.

[0011] Furthermore, the guide rail member includes a first vertical portion, a second vertical portion, and a connecting portion. The two ends of the connecting portion are fixedly connected to the bottom ends of the first vertical portion and the second vertical portion respectively. The first vertical portion is fixedly connected to the connecting seat, and the guide member is slidingly connected to the second vertical portion. The fixed position combination of the first vertical portion, the connecting member, and the second vertical portion makes the guide rail member as a whole U-shaped.

[0012] Furthermore, a track groove is provided in the second vertical portion, and the guide member is inserted into the track groove, and the height of the second vertical portion is greater than the height of the first vertical portion; a track groove is opened in the second vertical portion to slide with the guide member, and since the sliding connection between the track groove and the guide member is to provide a lateral force point for the up and down movement of the cylinder piston, avoiding external non-vertical forces acting on the piston to cause it to deflect, it requires the contact surface to have a larger contact area, so the length of the track groove cannot be too short, and the first vertical portion is fixedly connected to the connecting seat and cannot interfere with the connecting seat, so the height of the second vertical portion is set to be greater than the height of the first vertical portion.

[0013] Furthermore, the guide member includes a transition portion and a sliding portion, the sliding portion is an L-shaped plate, one end of the L-shaped long side of the sliding portion is inserted into the track groove and slidably connected to the track groove, one end of the short side is fixedly connected to the side of the transition portion, the bottom end of the transition portion is fixedly connected to the piston rod of the cylinder, and the top end of the transition portion is rotatably connected to the connecting member; the sliding portion needs to assist in maintaining the vertical up and down movement of the cylinder piston rod, so the sliding portion is set to be longer, and the length of one end of the L-shaped short side corresponds to the distance between the track groove and the transition portion.

[0014] Furthermore, a first stop block is provided at the bottom end of the side of the sliding portion close to the connecting seat, and a second stop block is provided on the side of the top end of the connecting seat, and the first stop block is used to contact the second stop block to prevent the piston rod of the cylinder from rising excessively; the setting of the stop block can prevent the external pressure-applying equipment from adding excessive pressure instantly, causing the piston rod to rise rapidly, causing the piston end to collide with the cylinder body and be damaged, and at the same time can assist the protrusion to prevent the swing arm from shaking.

[0015] Furthermore, the connecting part of the guide rail member is provided with a piston hole, and the piston rod of the cylinder passes through the piston hole; the piston hole and the piston rod are clearance-fitted or over-fitted, and grease should be applied to the surface of the piston rod during operation to ensure that the piston hole and the piston rod member slide smoothly with low resistance, thereby improving the rotation efficiency.

[0016] Furthermore, the cylinder is fixedly connected to the connecting seat by being installed on the bottom surface of the connecting portion; the piston rod of the cylinder needs to be vertically connected to the guide member, so the cylinder needs to be arranged directly below the guide member.

[0017] Furthermore, the swing arm is a plate-shaped part, and a support block and a part limit block are respectively provided on both sides of the top of the swing arm, and the part limit block and the protrusion are located on the same side of the swing arm; the function of the support block is to act as a cushion between the opening and closing part and the swing arm, and the support block is made of nylon material to avoid scratching the opening and closing part. The function of the part limit block is to limit the horizontal movement of the opening and closing part to avoid horizontal movement during rolling, resulting in poor rolling accuracy.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. A connecting seat is provided for rotational connection with the swing arm, the swing arm is rotationally connected to one end of the connecting piece, the other end of the connecting piece is rotationally connected to the guide piece, the guide piece is fixedly connected to the top end of the piston rod of the cylinder, the cylinder is fixedly connected to the bottom surface of the connecting seat, and a raised portion is also provided on the side of the swing arm close to the second rotation center. In the supported state, the raised portion is located above the third rotation center and contacts the connecting piece. The force of the cylinder piston pushing upward or the opening and closing piece pressing downward is transmitted to the second rotation center. The raised portion blocks the shaking of the connecting piece and stably transmits the force of the cylinder to the swing arm, thereby achieving the effect of avoiding the shaking of the opening and closing piece caused by failure of the limit support.

[0020] 2. One end of the guide rail is fixedly connected to the connecting seat, and the other end is slidably connected to the guide member; the guide rail cooperates with the guide member to assist in correcting the movement of the cylinder piston rod, so that it maintains vertical up and down movement, and avoids the piston rod from breaking due to deviation of the piston rod movement.

[0021] 3. A support block and a part limit block are set on the swing arm. The support block plays a buffering and pressure-bearing role between the opening and closing parts and the swing arm to avoid damage to the opening and closing parts. The part limit block limits the horizontal position of the opening and closing parts to avoid horizontal movement during rolling, which leads to poor rolling accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of a support device for a roll-edge loading platform of a wear-resistant opening and closing part;

[0023] Figure 2 A three-dimensional diagram of a guide rail component of a support device for a wear-resistant opening and closing component roll-edge loading platform;

[0024] Figure 3 A three-dimensional diagram of a guide member of a support device for a roll-edge loading platform of an anti-wear opening and closing member;

[0025] Figure 4 This is a structural schematic diagram of the installation status of a wear-resistant opening and closing part rolling edge loading platform support device.

[0026] In the accompanying drawings: 1. Connecting seat; 110. Second blocking block; 120. Second stop block; 2. Swing arm; 210. First rotation center; 220. Second rotation center; 230. First blocking block; 240. Protrusion; 3. Connecting member; 310. Third rotation center; 4. Guide member; 410. Transition portion; 411. First stop block; 420. Sliding portion; 5. Cylinder; 6. Support block; 7. Part limit block; 8. Guide rail member; 810. First vertical portion; 820. Second vertical portion; 821. Track groove; 830. Connecting portion; 831. Piston hole. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and so on indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Example 1

[0030] This embodiment is a first embodiment of a wear-resistant opening and closing part piping upper part support device. Figure 1 As shown, it includes a connecting seat 1, a swing arm 2, a connecting member 3, a guide member 4, a cylinder 5, and the connecting seat 1 is rotatably connected to the swing arm 2, and its rotation center is the first rotation center 210. The swing arm 2 is rotatably connected to one end of the connecting member 3, and its rotation center is the second rotation center 220. The other end of the connecting member 3 is rotatably connected to the guide member 4, and its rotation center is the third rotation center 310. The guide member 4 is fixedly connected to the top end of the piston rod of the cylinder 5, and the cylinder 5 is fixedly connected to the bottom surface of the connecting seat 1. It also includes a protrusion 240 arranged on the side of the swing arm 2 close to the second rotation center 220. In the supported state, the protrusion 240 is located above the third rotation center 310 and contacts with the connecting member 3.

[0031] Specifically, it also includes a first blocking block 230 and a second blocking block 110. The first blocking block 230 is located on the bottom surface of the swing arm 2 close to the first rotation center 210, and the second blocking block 110 is located on the top surface of the connecting seat 1 close to the first rotation center 210. During the rotation of the first rotation center 210, when the swing arm 2 moves to the supporting state, the bottom surface of the swing arm 2 needs to contact the top surface of the connecting seat 1 to prevent the swing arm 2 from continuing to rotate. There needs to be a certain clamping force between the two contact surfaces to lock the swing arm 2. The first blocking block 230 and the second blocking block 110 are set to bear force here. The material of the blocking block is pressure-resistant and wear-resistant material, generally vermicular graphite cast iron, which can effectively withstand pressure to avoid the collapse of the joint surface and improve durability.

[0032] The working principle of the support device for the treaded edge loading platform of an anti-wear opening and closing part in this embodiment is as follows:

[0033] The external air pressure equipment is started to pressurize and inflate the cylinder 5. The gas enters the cylinder 5 and pushes the piston to raise the entire piston rod, thereby driving the entire guide member 4 to move upward. The guide member 4 pushes the connecting member 3 upward and the second rotation center 220 and the third rotation center 310 to rotate, thereby driving the first rotation center 210 to rotate and causing the entire swing arm 2 to rotate to the support position. The first stop block 230 under the swing arm 2 collides with the second stop block 110 on the top surface of the connecting seat 1 to prevent the swing arm 2 from continuing to rotate, and the swing arm 2 enters the support state. When the four side surfaces at both ends of the contact point between the connecting member 3 and the swing arm 2 at the second rotation center 220 are in contact with each other, the force of the piston of the cylinder 5 pushing upward or the opening and closing member pressing downward is transmitted to the second rotation center 220, and the protrusion 240 prevents the shaking caused by the wear of the joint surface of the connecting member 3, and stably transmits the force of the cylinder 5 to the swing arm 2.

[0034] The beneficial effects of this embodiment are as follows: a protrusion 240 is provided under the swing arm 2. When the contact surface of the second rotation center 220 is worn, the protrusion 240 can play a force-bearing role, stably transmitting the force of the cylinder to the swing arm, avoiding the swing arm 2 from shaking, effectively improving the supporting stability effect of the supporting device, and thus improving the rolling accuracy and quality of the opening and closing parts.

[0035] Example 2

[0036] This embodiment is a second embodiment of a wear-resistant opening and closing part piping upper part support device. Figures 1 to 3 As shown, the difference from Example 1 is that:

[0037] Specifically, it also includes a guide rail member 8, one end of which is fixedly connected to the connecting seat 1, and the other end is slidably connected to the guide member 4; the guide rail member 8 cooperates with the guide member 4. Since the piston rod of the cylinder 5 does not move completely vertically up and down during the up and down movement, it will shake. Therefore, the guide member 4 and the guide rail member 8 are set to correct the movement of the piston rod so that it can move up and down stably in the vertical direction.

[0038] Specifically, the guide rail member 8 includes a first vertical portion 810, a second vertical portion 820, and a connecting portion 830. The two ends of the connecting portion 830 are fixedly connected to the bottom ends of the first vertical portion 810 and the second vertical portion 820 respectively. The first vertical portion 810 is fixedly connected to the connecting seat 1, and the guide member 4 is slidingly connected to the second vertical portion 820. The fixed position combination of the first vertical portion 810, the connecting member 3, and the second vertical portion 820 makes the guide rail member 8 as a whole U-shaped.

[0039] Specifically, the first vertical portion 810 is fixedly connected to the connecting seat 1, and a track groove 821 is provided in the second vertical portion 820, and the guide member 4 is inserted into the track groove 821. The height of the second vertical portion 820 is greater than the height of the first vertical portion 810; a track groove 821 is opened in the second vertical portion 820 to slide with the guide member 4, and since the sliding connection between the track groove 821 and the guide member 4 is to provide a lateral force point for the up and down movement of the piston of the cylinder 5, avoiding external non-vertical forces acting on the piston to cause it to deflect, the length of the track groove 821 cannot be too short, and the first vertical portion 810 is fixedly connected to the connecting group and cannot interfere with the connecting seat 1, so the height of the second vertical portion 820 is set to be greater than the height of the first vertical portion 810.

[0040] Specifically, the guide member 4 includes a transition portion 410 and a sliding portion 420. The sliding portion 420 is an L-shaped plate. One end of the L-shaped long side of the sliding portion 420 is inserted into the track groove 821 and is slidingly connected to the track groove 821, and one end of the short side is fixedly connected to the side of the transition portion 410. The bottom end of the transition portion 410 is fixedly connected to the piston rod of the cylinder 5, and the top end of the transition portion 410 is rotatably connected to the connecting member 3; the sliding portion 420 needs to assist in maintaining the vertical up and down movement of the piston rod of the cylinder 5, so the sliding portion 420 is set to be longer, and the length of one end of the L-shaped short side corresponds to the distance between the track groove 821 and the transition portion 410.

[0041] Specifically, a first stop block 411 is provided at the bottom end of the side of the sliding portion 420 close to the connecting seat 1, and a second stop block 120 is provided on the side of the top of the connecting seat 1. The first stop block 411 is used to contact the second stop block 120 to prevent the piston rod of the cylinder 5 from rising excessively; the setting of the stop block can prevent the external pressure-applying equipment from instantly adding excessive pressure, causing the piston rod to rise rapidly, causing the piston end to collide with the cylinder body and be damaged, and at the same time assist the protrusion 240 to prevent the swing arm 2 from shaking.

[0042] Specifically, the connecting portion 830 of the guide rail member 8 is provided with a piston hole 831, and the piston rod of the cylinder 5 passes through the piston hole 831; the piston hole 831 and the piston rod are clearance-fitted or over-fitted, and grease should also be applied to the surface of the piston rod during operation to ensure that the piston hole 831 and the piston rod member slide smoothly with low resistance, thereby improving the rotation efficiency.

[0043] Specifically, the cylinder 5 is fixedly connected to the connecting seat 1 by being installed on the bottom surface of the connecting portion 830 of the guide rail member 8; the piston rod of the cylinder 5 needs to be vertically connected to the guide member 4, so the cylinder 5 needs to be arranged directly below the guide member 4.

[0044] The working principle of the support device for the treaded edge loading platform of an anti-wear opening and closing part in this embodiment is as follows:

[0045] When the piston rod of the cylinder 5 moves up and down, the sliding portion 420 of the guide member 4 slides in the track groove 821 of the guide member 8. When the movement direction of the piston rod deviates, the cooperation between the sliding portion 420 and the track groove 821 can provide a corrective force to correct the movement of the cylinder 5, so that the piston rod is pushed vertically upward out of the transition portion 410 of the guide member 4.

[0046] The beneficial effects of this embodiment are as follows: the guide rail member 8 cooperates with the guide member 4 to assist in correcting the movement of the piston rod of the cylinder 5, so that it maintains vertical up and down movement, thereby preventing the piston rod from breaking due to deviation of the piston rod movement.

[0047] Example 3

[0048] This embodiment is a third embodiment of a wear-resistant opening and closing part rolling edge upper part support device. Figure 4 As shown, the difference from Example 1 is that:

[0049] Specifically, the swing arm 2 is a plate-shaped part, and a support block 6 and a part limit block 7 are respectively provided on both sides of the top of the swing arm 2. The part limit block 7 and the protrusion 240 are located on the same side of the swing arm 2; the function of the support block 6 is to act as a cushion between the opening and closing part and the swing arm 2. The support block 6 is made of nylon material to avoid scratching the opening and closing part. The function of the part limit block 7 is to limit the horizontal movement of the opening and closing part to avoid horizontal movement during rolling, resulting in poor rolling accuracy.

[0050] The working principle of the support device for the treaded edge loading platform of an anti-wear opening and closing part in this embodiment is as follows:

[0051] After installing the supporting devices at various installation positions on the loading platform, place the opening and closing parts on the supporting devices so that the surface of the opening and closing parts contacts the support block 6, and then slightly adjust the opening and closing parts so that the edges of the opening and closing parts contact the part limit blocks 7. During the rolling process of the opening and closing parts, the part limit blocks 7 on several supporting devices limit the horizontal movement of the opening and closing parts together.

[0052] The beneficial effects of this embodiment are as follows: a support block 6 and a part limit block 7 are provided on the swing arm 2; the support block 6 acts as a buffer and pressure-bearing force between the opening and closing part and the swing arm 2 to avoid damage to the opening and closing part; the part limit block 7 limits the horizontal position of the opening and closing part to avoid horizontal movement during hemming, resulting in poor hemming accuracy.

[0053] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A support device for a wear-resistant opening and closing part rolling edge upper part table, comprising a connecting seat (1), a swing arm (2), a connecting member (3), a guide member (4), and a cylinder (5), wherein the connecting seat (1) is rotatably connected to the swing arm (2), and its rotation center is a first rotation center (210), the swing arm (2) is rotatably connected to one end of the connecting member (3), and its rotation center is a second rotation center (220), the other end of the connecting member (3) is rotatably connected to the guide member (4), and its rotation center is a third rotation center (310), the guide member (4) is fixedly connected to the top end of the piston rod of the cylinder (5), and the cylinder (5) is fixedly connected to the connecting seat (1), characterized in that It also includes a raised portion (240) provided on the side of the swing arm (2) close to the second rotation center (220); in the supported state, the raised portion (240) is located above the third rotation center (310) and in contact with the connecting member (3).

2. The anti-wear opening and closing part hemming loading platform support device according to claim 1 is characterized in that: The invention also includes a first blocking block (230) and a second blocking block (110), wherein the first blocking block (230) is located on the bottom surface of the swing arm (2) close to the first rotation center (210), and the second blocking block (110) is located on the top surface of the connecting seat (1) close to the first rotation center (210).

3. The anti-wear opening and closing part hemming loading platform support device according to claim 1 is characterized in that: It also includes a guide rail member (8), one end of which is fixedly connected to the connecting seat (1) and the other end of which is slidably connected to the guide member (4).

4. The anti-wear opening and closing part hemming loading platform support device according to claim 3 is characterized in that: The guide rail member (8) comprises a first vertical portion (810), a second vertical portion (820), and a connecting portion (830), wherein both ends of the connecting portion (830) are fixedly connected to the bottom ends of the first vertical portion (810) and the second vertical portion (820), respectively; the first vertical portion (810) is fixedly connected to the connecting seat (1), and the guide member (4) is slidably connected to the second vertical portion (820).

5. The anti-wear opening and closing part hemming loading platform support device according to claim 4 is characterized in that: A track groove (821) is provided in the second vertical portion (820), and the guide member (4) is inserted into the track groove (821). The height of the second vertical portion (820) is greater than the height of the first vertical portion (810).

6. The anti-wear opening and closing part hemming loading platform support device according to claim 5, characterized in that: The guide member (4) includes a transition portion (410) and a sliding portion (420). The sliding portion (420) is an L-shaped plate. One end of the L-shaped long side of the sliding portion (420) is inserted into the track groove (821) and is slidably connected to the track groove (821). One end of the short side is fixedly connected to the side of the transition portion (410). The bottom end of the transition portion (410) is fixedly connected to the piston rod of the cylinder (5), and the top end of the transition portion (410) is rotatably connected to the connecting member (3).

7. The anti-wear opening and closing part hemming loading platform support device according to claim 6, characterized in that: A first stop block (411) is provided at the bottom end of the side surface of the sliding portion (420) close to the connecting seat (1), and a second stop block (120) is provided on the side surface of the top end of the connecting seat (1). The first stop block (411) is used to contact the second stop block (120) to prevent the piston rod of the cylinder (5) from rising excessively.

8. The anti-wear opening and closing part hemming loading platform support device according to claim 4 is characterized in that: The connecting portion (830) of the guide rail member (8) is provided with a piston hole (831), and the piston rod of the cylinder (5) passes through the piston hole (831).

9. The anti-wear opening and closing part hemming loading platform support device according to claim 4, characterized in that: The cylinder (5) is fixedly connected to the connecting seat (1) by being mounted on the bottom surface of the connecting portion (830).

10. The anti-wear opening and closing part hemming loading platform support device according to claim 1, characterized in that: The swing arm (2) is a plate-shaped member, and a support block (6) and a part stop block (7) are respectively provided on both sides of the top end of the swing arm (2), and the part stop block (7) and the protrusion (240) are located on the same side of the swing arm (2).

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