A bending and forming device for RV accessories

Abstract

The present invention relates to the technical field of bending and forming, and particularly relates to a bending and forming device for RV accessories, which includes a working platform, a rectangular cover plate installed at the upper end of the working platform, and a conveying unit jointly arranged between the two. The conveying unit includes a feeding mechanism for pushing the blank plate for feeding and a discharging mechanism for pushing the bent finished product for discharging. A supporting mechanism for supporting the blank plate before and after bending is arranged on the working platform. The bending and forming device further includes a primary bending mechanism and a continuous bending mechanism; when the primary bending mechanism moves downward, it cooperates with the secondary bending part to perform a secondary bending on the part of the blank plate located on the receiving groove. When the primary bending mechanism moves upward, it cooperates with the tertiary bending part to complete the third bending work, turning it into a C-shaped structure. The entire bending process only requires the hydraulic push rod to reciprocate up and down once to complete the three consecutive bends of the blank plate, with a high degree of automation, and the holding time for the first and second bends is long, resulting in better quality of the finished product.

Description

Technical Field

[0001] The present invention relates to the technical field of bending and forming, and particularly relates to a bending and forming device for RV accessories. Background Art

[0002] RV accessories refer to various devices and components used in RVs. Among them, the connecting piece that connects the suspension part and the chassis includes a concave-shaped plate-like metal connecting piece. Bending and shaping the metal connecting piece is a common process in the field of metal processing, mainly used to form the required shape of the connecting piece by bending and shaping operations on metal materials such as steel plates and aluminum alloys. Especially when manufacturing a concave-shaped metal connecting piece, bending is often required to meet the design requirements. Bending and shaping not only require the precise shape of the metal connecting piece, but also require efficient and reliable performance during the production process.

[0003] Currently, when bending a concave-shaped metal connecting piece with an inner flanging, multiple bendings are required, resulting in low bending efficiency. Secondly, when the bent product is discharged, there is generally friction with the mold, which not only makes the discharging slow, but also causes wear to the product. Summary of the Invention

[0004] Technical Problem to be Solved: A bending and forming device for RV accessories provided by the present invention can solve the above-mentioned problems.

[0005] Technical Solution: To achieve the above object, the present invention adopts the following technical solution. A bending and forming device for RV accessories includes a working platform, a rectangular cover plate installed at the upper end of the working platform, and a conveying unit jointly arranged between the two. The conveying unit includes a feeding mechanism for pushing and feeding the blank and a discharging mechanism for pushing and discharging the bent finished product. The feeding mechanism includes a feeding port opened at the lower side of the front end of the rectangular cover plate.

[0006] A supporting mechanism for supporting the blank before and after bending is arranged on the working platform. The bending and forming device further includes a primary bending mechanism and a continuous bending mechanism. The supporting mechanism includes a receiving groove opened in the middle of the upper end of the working platform and a supporting plate slidably arranged in the receiving groove through a second spring telescopic rod.

[0007] The primary bending mechanism includes a limiting and adjusting part and a pressing plate that moves up and down. The limiting and adjusting part includes a limiting member that reciprocates back and forth. The limiting member includes a bidirectional spring telescopic rod installed at the upper end of the pressing plate and rectangular support plates fixed at the front and rear telescopic ends of the bidirectional spring telescopic rod.

[0008] The continuous bending mechanism includes a three-stage bending part and two second-stage bending parts symmetrically arranged front and back. When the pressing plate descends, the material plate is pressed into the receiving groove to form a U-shaped structure, and during the descending process, it cooperates with the second-stage bending part to bend the part of the material plate located on the receiving groove into an L-shaped structure. When the pressing plate ascends, the supporting plate lifts the material plate upward and cooperates with the three-stage bending part to bend the part of the material plate located on the receiving groove into a C-shaped structure.

[0009] Preferably, the limit adjustment part further includes a driving part for driving the rectangular support plate to move back and forth. The driving part includes two left and right four-headed cams rotatably installed at the upper end of the pressing plate. The stroke on the front and back sides of the four-headed cam is smaller than the stroke on the left and right sides. The ends with the same stroke of the two left and right four-headed cams are simultaneously in contact with the front and back rectangular support plates. The four-headed cams rotate synchronously and intermittently to push the rectangular support plates away from each other or close to each other.

[0010] Preferably, the first-stage bending mechanism includes two left and right hydraulic push rods fixed to the upper end of the rectangular cover plate. The telescopic ends of the hydraulic push rods are all installed with support columns. A support cross plate is jointly and fixedly sleeved on the upper sides of the two left and right support columns. The pressing plate is fixed to the lower ends of the two left and right support columns.

[0011] Preferably, the second-stage bending part includes return-shaped chutes opened on the inner walls of the left and right ends of the rectangular cover plate. A second support slide rod is jointly and slidably installed on the inner walls of the two left and right return-shaped chutes. Rectangular grooves are opened on the inner walls of the left and right ends of the rectangular cover plate and within the return-shaped chutes. The second-stage bending part further includes a C-shaped support sliding plate fixedly sleeved on the outer wall of the second support slide rod. The front and back inner walls of the rectangular cover plate are respectively connected to the corresponding C-shaped support sliding plates through two left and right spring telescopic rods. The lower end of the C-shaped support sliding plate is slidably sleeved with a C-shaped sleeve plate one through a plurality of compression springs. An elastic telescopic rod is hinged. The left and right sides of the upper end of the support cross plate are respectively hinged with elastic telescopic rods. The telescopic ends of the two left and right elastic telescopic rods are rotatably sleeved on the second support slide rod.

[0012] Preferably, anti-reverse parts are jointly arranged on the two left and right return-shaped chutes and the rectangular cover plate. The anti-reverse parts play an anti-reverse role in the sliding direction of the second support slide rod. The anti-reverse part includes a mounting column rotatably penetrating and installed at the position corresponding to the rectangular groove on the outer wall of the rectangular cover plate. A plurality of limit rods evenly distributed in a circle are installed at one end of the mounting column located in the rectangular groove. Inner ratchet rings are installed at one end of the mounting column located outside the rectangular cover plate. Mounting arc grooves are symmetrically opened on the outer wall of the mounting column corresponding to the inner ratchet rings. Pawls are hinged on the inner walls of the mounting arc grooves through compression springs. The two pawls are arranged in opposite directions, and both pawls are intermittently engaged with the corresponding inner ratchet rings.

[0013] Preferably, the three-stage bending portion includes an inverted T-shaped plate installed on the inner wall of the upper end of the rectangular cover plate, and bent top plates are installed at the front and rear ends of the horizontal section of the inverted T-shaped plate. L-shaped baffles are symmetrically installed at the opposite ends of the front and rear two 匚-shaped sleeve plates. The vertical section length of the front L-shaped baffle plate is shorter than that of the rear L-shaped baffle plate. The lower end of the vertical section of the front L-shaped baffle plate is provided with a 匚-shaped sleeve plate 2 through a plurality of compression spring sliding sleeves, and the front side of the lower end of the 匚-shaped sleeve plate 2 is a wedge-shaped structure.

[0014] Preferably, the unloading mechanism includes a rectangular mounting groove 2 located on the upper end of the working platform and opened on both the front and rear sides of the accommodating groove. Slide rails are installed in the front and rear rectangular mounting grooves 2, and an electric slider is installed on the slide rail. A material stripping plate is installed on the upper end of the electric slider, and the front and rear material stripping plates are symmetrically arranged.

[0015] Preferably, the feeding mechanism also includes conveying rollers and material baffle plates. Two material baffle plates are installed on the inner walls at both ends of the front and rear ends of the rectangular cover plate. The material baffle plates are located at the left and right ends of the feed port. A rectangular mounting groove 1 is opened on the front side of the upper end of the working platform. Multiple conveying rollers are rotatably installed in the rectangular mounting groove 1. The left ends of the multiple conveying rollers all rotate and pass through the working platform, and the left ends of the multiple conveying rollers are connected through a sprocket chain transmission.

[0016] Preferably, rolling groups are provided at the opposite ends of the front and rear rectangular support plates, and the rolling groups include a plurality of accommodating slide grooves evenly opened from left to right on the rectangular support plates, and an installation slide plate is slidably connected in the accommodating slide groove through two upper and lower compression springs, and a rotating roller is rotatably installed between the upper and lower installation slide plates.

[0017] Preferably, the upper end of the support plate is also provided with two front and rear rolling groups, the difference being that the mounting slide in the accommodating slide groove on the support plate is fixed to the inner wall of the accommodating slide groove, and the rotating roller is flush with the upper surface of the support plate.

[0018] Beneficial effects: 1. The material sheet can be initially bent into a U-shaped structure through the primary bending mechanism, and at the same time, the continuous bending mechanism can drive the front and rear 匚-shaped sleeves to approach each other, perform a secondary bend on the part of the material sheet located on the accommodating groove, and then drive the material sheet to move upward, so that the front and rear two bending top plates perform a third bending work on the corresponding position of the upper end of the material sheet to make it into a 匚-shaped structure. The entire bending process only requires the hydraulic push rod to reciprocate and lift once to complete the three consecutive bendings of the material sheet. The degree of automation is high, and when the three bendings are completed, the first bending and the second bending have a long pressure holding time, and the quality of the metal connector is better after bending.

[0019] 2. The conveying roller of the feeding mechanism makes the material sheet loading smoother, and the distance between the rectangular support plates is adjusted by the driving member to expose the rolling group, which facilitates the unloading mechanism to push out the finished product more smoothly and reduces the wear of the finished product and the bending fitting surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic three-dimensional structure diagram of the present invention.

[0022] Figure 2 It is a schematic three-dimensional structure diagram of the positive half-section of the present invention.

[0023] Figure 3 It is the present invention Figure 2 An enlarged view of the X position in the present invention.

[0024] Figure 4 It is a schematic three-dimensional structure diagram of the left half-section of the present invention.

[0025] Figure 5 It is the present invention Figure 4 An enlarged view of the Y position in the present invention.

[0026] Figure 6 It is the present invention Figure 4 An enlarged view of the Z position in the present invention.

[0027] Figure 7 It is a schematic three-dimensional structure diagram of the partial section of the blanking mechanism in the present invention.

[0028] Figure 8 It is the present invention Figure 7 An enlarged view of the W position in the present invention.

[0029] Figure 9 It is a schematic three-dimensional structure diagram of the partial section at the continuous bending mechanism in the present invention.

[0030] Figure 10 It is a schematic three-dimensional structure diagram of the primary bending mechanism and the continuous bending mechanism in the present invention.

[0031] Figure 11 It is a schematic three-dimensional structure diagram of the primary bending mechanism in the present invention.

[0032] Figure 12 It is a schematic three-dimensional structure diagram of the first perspective of the return-shaped chute and the rectangular groove in the present invention.

[0033] Figure 13 It is a schematic three-dimensional structure diagram of the second perspective of the return-shaped chute and the rectangular groove in the present invention.

[0034] Figure 14 It is a process change diagram of bending a flat stock plate into a metal connector in the present invention.

[0035] In the figure: 1, working platform; 2, rectangular cover plate; 3, avoidance opening; 4, feeding mechanism; 41, feeding port; 42, baffle plate; 43, first rectangular installation groove; 44, conveying roller; 45, first motor; 46, slide rail; 47, electric slider; 48, material pushing plate; 49, second rectangular installation groove; 5, supporting mechanism; 51, accommodating groove; 52, second spring telescopic rod; 53, supporting plate; 6, primary bending mechanism; 61, hydraulic push rod; 62, supporting column; 63, supporting cross plate; 64, pressing plate; 65, limit adjusting part; 651, kidney-shaped through hole; 652, first supporting slide rod; 653, rectangular supporting plate; 654, kidney-shaped connecting plate; 655, bi-directional spring telescopic rod; 656, four-headed cam; 657, passive gear; 658, second motor; 659, transmission shaft; 660, incomplete gear; 661, supporting shaft; 7, continuous bending mechanism; 71, mounting plate; 72, secondary bending part; 721, return-shaped chute; 722, second supporting slide rod; 723, rectangular groove; 724, mounting post; 725, limiting rod; 726, internal ratchet ring; 727, mounting arc groove; 728, ratchet pawl; 729, C-shaped supporting slide plate; 730, first spring telescopic rod; 731, first C-shaped sleeve plate; 732, connecting slide plate; 733, elastic telescopic rod; 74, tertiary bending part; 741, inverted T-shaped plate; 742, bending top plate; 743, L-shaped baffle; 744, second C-shaped sleeve plate; 8, accommodating chute; 9, mounting slide plate; 10, rotating roller. Detailed implementation manners

[0036] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways defined and covered by the claims.

[0037] Refer to Figure 1 , a bending and forming device for RV accessories, including a working platform 1. An opening-downward rectangular cover plate 2 is installed at the upper end of the working platform 1. Avoidance openings 3 are provided at both the left and right ends of the rectangular cover plate 2. A conveying unit is jointly arranged on the working platform 1 and the rectangular cover plate 2. A supporting mechanism 5 is arranged on the working platform 1. A primary bending mechanism 6 is jointly arranged on the working platform 1 and the rectangular cover plate 2. A continuous bending mechanism 7 is jointly arranged by the primary bending mechanism 6 and the rectangular cover plate 2.

[0038] Refer to Figure 1 、 Figure 4 and Figure 7The conveying unit includes a loading mechanism 4 for pushing the material sheet to be bent and a unloading mechanism for pushing the bent finished product. The loading mechanism 4 includes a feed port 41 opened at the lower side of the front end of the rectangular cover plate 2, and two baffle plates 42 are installed on the inner walls of the front and rear ends of the rectangular cover plate 2. The baffle plates 42 are located at the left and right ends of the feed port 41, and the lower ends of multiple baffle plates 42 are all attached to the working platform 1. A rectangular mounting groove 43 is opened on the front side of the upper end of the working platform 1. A plurality of conveying rollers 44 are rotatably installed in the rectangular mounting groove 43. The left ends of the multiple conveying rollers 44 are all rotatable and penetrate the working platform 1, and the left ends of the multiple conveying rollers 44 are connected by sprocket chain transmission. A No. 1 motor 45 is installed on the left end of the working platform 1 through a motor seat, and the output shaft of the No. 1 motor 45 is fixedly connected to any one of the conveying rollers 44.

[0039] See also Figure 1 , Figure 2 and Figure 4 The supporting mechanism 5 includes a receiving groove 51 opened in the middle of the upper end of the working platform 1, and a plurality of spring telescopic rods 52 evenly distributed in a rectangular shape are installed through the bottom wall of the receiving groove 51. The telescopic ends of the plurality of spring telescopic rods 52 are jointly installed with a supporting plate 53 slidably connected to the receiving groove 51. When the spring telescopic rods 52 are not subjected to external force, the upper end surface of the supporting plate 53 is flush with the working platform 1.

[0040] First, the material sheet to be bent is transported from the feed port 41 to the working platform 1 by an external loading device, and the material sheet is transported backward to the supporting plate 53 under the action of the conveying roller 44, and the baffle plate 42 limits the left and right ends of the material sheet.

[0041] See also Figure 1 , Figure 2 , Figure 5 and Figure 11 The primary bending mechanism 6 includes two left and right hydraulic push rods 61 installed through the upper end of the rectangular cover plate 2, and the telescopic ends of the left and right hydraulic push rods 61 are installed with support columns 62. The upper sides of the left and right support columns 62 are commonly fixed with a support cross plate 63, and the lower ends of the left and right support columns 62 are commonly installed with a pressure plate 64. The pressure plate 64 and the support cross plate 63 are commonly provided with a limited position adjustment part 65.

[0042] See also Figure 2 , Figure 5 , Figure 10 and Figure 11, the position-limiting and adjusting part 65 includes a position-limiting member that reciprocates back and forth. The position-limiting member includes two front-back waist-shaped through holes 651 opened at the left end of the pressing plate 64. A first support slide rod 652 is slidably installed in each of the two front-back waist-shaped through holes 651. Two front-back rectangular support plates 653 are slidably installed on the upper end of the pressing plate 64 in the front-back direction. Waist-shaped connecting plates 654 are installed at the lower sides of the left and right ends of the rectangular support plate 653. The left and right ends of the first support slide rod 652 are respectively fixedly connected to the corresponding waist-shaped connecting plates 654. Bidirectional spring telescopic rods 655 are installed on the left and right sides of the upper end of the pressing plate 64 through mounting seats. The front and back telescopic ends of the bidirectional spring telescopic rod 655 are respectively fixedly connected to the corresponding rectangular support plates 653.

[0043] Refer to Figure 3 , Figure 5 and Figure 11 , the position-limiting and adjusting part 65 further includes a driving member for driving the position-limiting member to reciprocate back and forth. The driving member includes two left-right four-lobe cams 656 rotatably installed on the upper end of the pressing plate 64. The stroke of the front and back sides of the four-lobe cam 656 is smaller than that of the left and right sides. The ends of the two left-right four-lobe cams 656 with the same stroke are simultaneously in contact with the two front-back rectangular support plates 653. Passive gears 657 are installed on the upper ends of the two left-right four-lobe cams 656. A second motor 658 is installed on the lower end of the support cross plate 63 through a motor seat. The output shaft of the second motor 658 is fixedly connected to a transmission shaft 659. An incomplete gear 660 is installed at the lower end of the transmission shaft 659. A support shaft 661 is also rotatably installed at the lower end of the support cross plate 63. An incomplete gear 660 is also installed at the lower end of the support shaft 661. The two left-right incomplete gears 660 are symmetrically arranged about the center. The transmission shaft 659 and the support shaft 661 are connected by a belt drive. The two left-right incomplete gears 660 are intermittently meshed with the corresponding passive gears 657 respectively.

[0044] It should be noted that initially, the two small convex heads of the two left-right four-lobe cams 656 are in contact with the two front-back rectangular support plates 653. By driving one of the incomplete gears 660 to rotate through the second motor 658, the other incomplete gear 660 rotates accordingly. The two incomplete gears 660 intermittently mesh to drive the passive gears 657 to rotate, so that the passive gears 657 drive the four-lobe cams 656 to rotate synchronously and in the same direction intermittently by 90 degrees, and further the four-lobe cams 656 push the rectangular support plates 653 away from each other.

[0045] Refer to Figure 2 , Figure 6 , Figure 9 and Figure 10 , the continuous bending mechanism 7 includes a pair of mounting plates 71 respectively installed on the left and right sides of the upper end of the support cross plate 63 and two second-level bending parts 72 symmetrically arranged in the front and back. A third-level bending part 74 is jointly provided on the rectangular cover plate 2 and the two front-back second-level bending parts 72.

[0046] Refer to Figure 9 、 Figure 12 and Figure 13 , the secondary bending part 72 includes return-shaped sliding grooves 721 opened on the inner walls at both left and right ends of the rectangular cover plate 2. A second support sliding rod 722 is slidably installed on the inner walls of the left and right return-shaped sliding grooves 721 together. Rectangular grooves 723 are opened on the inner walls at both left and right ends of the rectangular cover plate 2 and within the return-shaped sliding grooves 721. A reverse prevention member is provided on both the left and right return-shaped sliding grooves 721 and the rectangular cover plate 2 together. The reverse prevention member includes mounting posts 724 rotatably penetrating and installed at positions corresponding to the rectangular grooves 723 on the outer wall of the rectangular cover plate 2. A plurality of limiting rods 725 evenly distributed in a circular pattern are installed at one end of the mounting post 724 located within the rectangular groove 723. Inner ratchet rings 726 are installed at one end of the mounting post 724 located outside the rectangular cover plate 2. Mounting arc grooves 727 are symmetrically opened on the outer wall of the mounting post 724 corresponding to the inner ratchet rings 726. Pawls 728 are hinged to the inner walls of the mounting arc grooves 727 through compression springs. The two pawls 728 are arranged in opposite directions, and both pawls 728 are intermittently engaged with the corresponding inner ratchet rings 726.

[0047] Refer to Figure 5 、 Figure 9 and Figure 10 , the secondary bending part 72 further includes a U-shaped support sliding plate 729 fixedly sleeved on the outer wall of the second support sliding rod 722. The U-shaped support sliding plate 729 has an upward opening. The upper end of the U-shaped support sliding plate 729 is slidably attached to the rectangular cover plate 2. On the front and rear inner walls of the rectangular cover plate 2, two left and right spring telescopic rods 730 are respectively installed through mounting seats. The telescopic ends of the two left and right spring telescopic rods 730 are respectively fixedly connected to the upper ends of the two vertical segments on the left and right of the corresponding U-shaped support sliding plate 729. A U-shaped sleeve plate 731 is slidably sleeved on the lower end of the U-shaped support sliding plate 729 through a plurality of compression springs. A connecting sliding plate 732 that is slidably matched with the opening of the U-shaped support sliding plate 729 is installed in the middle of the upper end of the U-shaped sleeve plate 731. And the front side of the lower end of the front U-shaped sleeve plate 731 is a wedge-shaped structure, and the front and rear sides of the lower end of the rear U-shaped sleeve plate 731 are both wedge-shaped structures (as shown in Figure 4 ), and an elastic telescopic rod 733 is hinged between each pair of mounting plates 71. The telescopic ends of the two left and right elastic telescopic rods 733 are rotatably sleeved on the second support sliding rod 722.

[0048] Refer to Figure 2 、 Figure 5 、 Figure 9 and Figure 10The three-stage bending portion 74 includes an inverted T-shaped plate 741 installed on the inner wall of the upper end of the rectangular cover plate 2, and bent top plates 742 are installed at the front and rear ends of the horizontal section of the inverted T-shaped plate 741. L-shaped baffle plates 743 are symmetrically installed at the opposite ends of the front and rear two 匚-shaped sleeve plates 1 731. The vertical section length of the front L-shaped baffle plate 743 is shorter than the vertical section length of the rear L-shaped baffle plate 743. The lower end of the vertical section of the front L-shaped baffle plate 743 is provided with a 匚-shaped sleeve plate 2 744 through a plurality of compression spring sliding sleeves, and the front side of the lower end of the 匚-shaped sleeve plate 2 744 is a wedge-shaped structure.

[0049] It should be noted that the left and right hydraulic push rods 61 are initially in a retracted state, and the lower ends of the 匚-shaped sleeve plate 2 744 and the L-shaped baffle plate 743 on the rear side are both attached to the work platform 1. When the multiple conveying rollers 44 convey the material plate to move backward along the multiple baffle plates 42, the material plate will resist the 匚-shaped sleeve plate 2 744 and move it upward until the rear end of the material plate is tightly attached to the L-shaped baffle plate 743 on the rear side. After completing the loading and positioning work, the No. 1 motor 45 stops working.

[0050] After the loading and alignment work is completed, the driving part drives the rectangular support plates 653 away from each other, and then controls the left and right hydraulic push rods 61 to drive the corresponding support columns 62 to move downward respectively. The left and right support columns 62 jointly drive the pressure plate 64 to move downward until the pressure plate 64 presses down on the middle part of the material plate to complete the initial bending work. During this period, the material plate will drive the supporting plate 53 to move downward along the accommodating groove 51 and bend into a U-shaped structure.

[0051] At the same time, when the hydraulic push rod 61 is extended, multiple mounting plates 71 will move downward synchronously with the supporting cross plate 63. At this time, the elastic telescopic rod 733 is driven to move downward, and the angle of the elastic telescopic rod 733 gradually decreases. Under the limiting action of the circular slide groove 721, the elastic telescopic rod 733 will drive the corresponding supporting slide bar 2 722 to slide along the circular slide groove 721. At this time, the front and rear two supporting slide bars 2 722 gradually approach each other along the corresponding horizontal section at the bottom of the circular slide groove 721, thereby driving the corresponding 匚-shaped supporting slide plate 729 and 匚-shaped sleeve plate 1 731 to approach each other, until the front and rear two 匚-shaped sleeve plates 1 731 jointly perform secondary bending work on the part of the material plate located on the accommodating groove 51, and under the supporting action of the front and rear two rectangular support plates 653, the part of the material plate located on the accommodating groove 51 will be bent into an L-shaped structure.

[0052] After the part of the material plate located on the receiving groove 51 is bent and becomes an L-shaped structure, control the left and right hydraulic push rods 61 to drive the corresponding support columns 62 to move upward and return to their original positions respectively. The pressing plate 64 and the front and rear rectangular support plates 653 will follow and move upward. At this time, the material plate and the front and rear U-shaped sleeve plates 731 will also follow and move upward. Under the action of the plurality of spring telescopic rods II 52, the supporting plate 53 will follow and move upward to return to its original position. During this period, the front and rear support slide rods II 722 will first slide from the lower side of the vertical section of the return chute 721 to the upper side position of the vertical section, and under the action of the spring telescopic rod I 730, gradually move away along the upper horizontal section of the return chute 721. The two elastic telescopic rods 733 change from a vertically parallel state to a V-shaped state, and the included angle gradually increases.

[0053] The upward-moving material plate is forced to perform the third bending operation under the extrusion of the bending top plate 742, that is, the upper end of the material plate is bent into a U-shaped structure. Thus, the required metal connector is obtained. The primary bending mechanism 6 can initially bend the material plate into a U-shaped structure. At the same time, the continuous bending mechanism 7 can drive the front and rear U-shaped sleeve plates 731 to approach each other, perform a secondary bending on the part of the material plate located on the receiving groove 51, and then drive the material plate to move upward. Thus, through the front and rear bending top plates 742, a third bending operation is performed on the corresponding position of the upper end of the material plate to make it into a U-shaped structure. By means of one reciprocating stroke of the hydraulic push rod 61, a flat material plate is bent into a U-shaped metal connector at one time (as Figure 14 shown). The whole process has a high degree of automation, effectively improving the production efficiency and bending accuracy, and ensuring the production efficiency and product consistency.

[0054] Refer to Figure 7 、 Figure 8 and Figure 11 , rolling groups are arranged at the opposite ends of the front and rear rectangular support plates 653. The rolling group includes a plurality of receiving chutes 8 uniformly opened from left to right on the rectangular support plate 653. In the receiving chute 8, an installation slide plate 9 is slidably connected through upper and lower compression springs. A rotating roller 10 is rotatably installed between the upper and lower installation slide plates 9. Rolling groups are also arranged at the front and rear of the upper end of the supporting plate 53. The difference is that the installation slide plate 9 in the receiving chute 8 on the supporting plate 53 is fixed to the inner wall of the receiving chute 8, and the rotating roller 10 is flush with the upper surface of the supporting plate 53.

[0055] Refer to Figure 2 、 Figure 4 and Figure 7 The blanking mechanism includes rectangular installation grooves II 49 opened on both sides of the receiving groove 51 at the upper end of the working platform 1. Slide rails 46 are installed in the front and rear rectangular installation grooves II 49. Electric sliders 47 are installed on the slide rails 46. A material pushing plate 48 is installed at the upper end of the electric slider 47. The front and rear material pushing plates 48 are symmetrically arranged.

[0056] After the second bending of the material plate is completed, first control the drive shaft 659 to rotate by the second motor 658, indirectly driving the four-lobe cam 656 to rotate 90 degrees. The two lobes with a small stroke of the four-lobe cam 656 will contact the front and rear rectangular support plates 653, that is, the front and rear rectangular support plates 653 approach each other. At this time, under the action of the compression spring, the rotating rollers 10 on the front and rear rectangular support plates 653 extend out of the corresponding receiving chutes 8 and roll into contact with the inner wall of the material plate. When the supporting plate 53 drives the material plate to move upward, the material plate is first bent for the third time. The rotating rollers 10 on the supporting plate 53 reduce the friction between the bent material plate and the supporting plate 53 during subsequent blanking.

[0057] Finally, control the front and rear electric sliders 47 to drive the corresponding material pushing plates 48 to move to the right respectively. The front and rear material pushing plates 48 jointly drive the bent material plate to move to the right until it exits the working platform 1 and is picked up by an external material receiving and conveying device. Then control the front and rear electric sliders 47 to drive the corresponding material pushing plates 48 to move to the left respectively to return to the original position. Repeat the above operation steps, and the bending work of the material plate can be repeated. The blanking mechanism can push the bent material plate from left to right, facilitating blanking. Moreover, multiple rotating rollers 10 can reduce the wear on the surface of the material plate and enable the finished product to be smoothly pushed out.

[0058] In the description of the embodiments of the present invention, it should be noted that the terms: "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present invention. In addition, in the description of the present invention, unless otherwise specified, the meanings of "multiple", "multiple roots", and "multiple groups" are two or more.

[0059] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0060] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A bending and forming device for RV accessories, characterized in that: It includes a working platform, a rectangular cover plate installed at the upper end of the working platform, and a conveying unit jointly arranged between the two. The conveying unit includes a loading mechanism for pushing the material plate onto the machine and a discharging mechanism for pushing the bent finished product off the machine. The loading mechanism includes a feeding port opened at the lower side of the front end of the rectangular cover plate. A supporting mechanism for supporting the material plate before and after bending is arranged on the working platform. The bending and forming device further includes a primary bending mechanism and a continuous bending mechanism. The supporting mechanism includes a receiving groove opened in the middle of the upper end of the working platform and a supporting plate slidably arranged in the receiving groove through a second spring telescopic rod. The primary bending mechanism includes a limit adjusting part and a pressing plate that moves up and down. The limit adjusting part includes a limiting member that reciprocates back and forth. The limiting member includes a bidirectional spring telescopic rod installed at the upper end of the pressing plate and rectangular support plates fixed to the front and rear two telescopic ends of the bidirectional spring telescopic rod. The continuous bending mechanism includes a tertiary bending part and two secondary bending parts symmetrically arranged front and back. When the pressing plate descends, the material plate is pressed into the receiving groove to form a U-shaped structure, and during the descending process, it cooperates with the secondary bending part to bend the part of the material plate located above the receiving groove into an L-shaped structure. When the pressing plate ascends, the supporting plate lifts the material plate upward and cooperates with the tertiary bending part to bend the part of the material plate located above the receiving groove into a C-shaped structure. The secondary bending part includes U-shaped chutes opened on the inner walls of the left and right ends of the rectangular cover plate. A second support slide bar is slidably installed on the inner walls of the left and right U-shaped chutes together. Rectangular grooves are opened on the inner walls of the left and right ends of the rectangular cover plate and within the U-shaped chutes. The secondary bending part further includes a C-shaped support sliding plate fixedly sleeved on the outer wall of the second support slide bar. The front and rear inner walls of the rectangular cover plate are respectively connected to the corresponding C-shaped support sliding plates through two left and right spring telescopic rods. A C-shaped sleeve plate one is slidably sleeved on the lower end of the C-shaped support sliding plate through a plurality of compression springs. Elastic telescopic rods are hinged to the left and right sides of the upper end of the support cross plate, and the telescopic ends of the left and right two elastic telescopic rods are rotatably sleeved on the second support slide bar. The tertiary bending part includes an inverted T-shaped plate installed on the inner wall of the upper end of the rectangular cover plate. Bending top plates are installed at the front and rear ends of the horizontal section of the inverted T-shaped plate. L-shaped baffles are symmetrically installed at the opposite ends of the front and rear two C-shaped sleeve plates one. The vertical section length of the front L-shaped baffle is shorter than that of the rear L-shaped baffle. A C-shaped sleeve plate two is slidably sleeved on the lower end of the vertical section of the front L-shaped baffle through a plurality of compression springs, and the lower front side of the C-shaped sleeve plate two is a wedge-shaped structure.

2. The bending and forming device for a motorhome accessory according to claim 1, wherein: The limit adjusting part further includes a driving member for driving the rectangular support plates to reciprocate back and forth. The driving member includes two left and right four-headed cams rotatably installed at the upper end of the pressing plate. The stroke of the front and rear sides of the four-headed cam is smaller than that of the left and right sides. The ends of the two left and right four-headed cams with the same stroke simultaneously contact the front and rear two rectangular support plates, and the four-headed cams rotate synchronously and intermittently to push the rectangular support plates away from or close to each other.

3. A bending and forming device for a motorhome accessory according to claim 1, characterized in that: The primary bending mechanism includes two left and right hydraulic push rods fixed to the upper end of the rectangular cover plate. Support columns are installed at the telescopic ends of the hydraulic push rods. A support cross plate is fixedly sleeved on the upper sides of the two left and right support columns together, and the pressing plate is fixed to the lower ends of the two left and right support columns.

4. A bending and forming device for a recreational vehicle accessory according to claim 1, characterized in that: Anti-reverse members are commonly provided on both the left and right spiral chute and the rectangular cover plate. The anti-reverse members play an anti-reverse role in the sliding direction of the second support slide rod. The anti-reverse member includes a mounting post rotatably penetrating and installed at a position corresponding to the rectangular groove on the outer wall of the rectangular cover plate. A plurality of limiting rods evenly distributed in a circle are installed at one end of the mounting post located in the rectangular groove. Inner ratchet rings are installed at one end of the mounting post located outside the rectangular cover plate. Mounting arc grooves are symmetrically opened on the outer wall of the mounting post corresponding to the inner ratchet rings. Pawls are hinged to the inner walls of the mounting arc grooves through compression springs. The two pawls are arranged in opposite directions, and both pawls are intermittently engaged with the corresponding inner ratchet rings.

5. A bending and forming device for RV accessories according to claim 1, characterized in that: The blanking mechanism includes rectangular mounting grooves II opened on both the front and back sides of the upper end of the working platform and located on both sides of the accommodating groove. Slide rails are installed in the front and back rectangular mounting grooves II. Electric sliders are installed on the slide rails. Pushing plates are installed at the upper ends of the electric sliders. The front and back pushing plates are symmetrically arranged.

6. The bending and forming device for a motorhome accessory according to claim 1, characterized in that: The feeding mechanism further includes conveying rollers and baffle plates. Two baffle plates are installed on the inner walls of the front and back ends of the rectangular cover plate. The baffle plates are located at the left and right ends of the feeding port. A rectangular mounting groove I is opened on the front side of the upper end of the working platform. A plurality of conveying rollers are rotatably installed in the rectangular mounting groove I. The left ends of the plurality of conveying rollers all rotatably penetrate the working platform, and the left ends of the plurality of conveying rollers are connected by a sprocket chain drive.

7. A bending and forming device for a motorhome accessory according to claim 1, characterized in that: Rolling groups are provided at the opposite ends of the front and back rectangular support plates. The rolling group includes a plurality of accommodating chutes evenly opened from left to right on the rectangular support plate. Mounting slide plates are slidably connected in the accommodating chutes through upper and lower compression springs. A rotating roller is rotatably installed between the upper and lower mounting slide plates.

8. A bending and forming device for a recreational vehicle accessory according to claim 7, characterized in that: Rolling groups are also provided at the front and back ends of the upper end of the supporting plate. The difference is that the mounting slide plate in the accommodating chute on the supporting plate is fixed to the inner wall of the accommodating chute, and the rotating roller is flush with the upper surface of the supporting plate.

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