Automatic arm folding machine

Abstract

The invention discloses an automatic arm folding machine which comprises a workpiece limiting structure and a workpiece bending driving structure. The workpiece bending driving structure comprises a rotating shaft and a driving assembly. The driving assembly is characterized in that at least one pressure sensor is fixed to a fixing plate; the movable plate is fixed at the signal receiving end of the sensor; the support assembly comprises supports which are symmetrically arranged, and rotating grooves are formed in the opposite sides of the supports. Connecting shafts matched with the rotating grooves are arranged on the two sides of the roller. The buffer assembly comprises a buffer rod and a second guide rod fixed to the buffer rod, a second guide channel is formed in the movable plate, the second guide rod penetrates through the second guide channel and then is fixedly provided with a limiting ring, and the portion, between the buffer rod and the movable plate, of the second guide rod is sleeved with a buffer spring. According to the invention, automatic assembly is adopted, the fatigue of the folding arm can be tested, the test action is circulated, the test can be carried out until the arm fails, or the test frequency is set.

Description

Technical Field

[0001] The invention belongs to the field of automatic control equipment, and in particular relates to an automatic arm folding machine. Background Art

[0002] A tent is a shed propped up on the ground to provide shelter from wind, rain and sunlight and for temporary living. It is mostly made of canvas and can be removed and moved at any time together with the supporting materials. The tent is carried in parts and assembled after arriving at the site. Therefore, there are many types of folding tents, most of which are two hinged folding arms forming a folding support frame and a canvas tent surface. The existing tests on the life and fatigue of such folding arms are mostly carried out manually. During the test process, the folding arms are repeatedly bent to measure the number of times the folding arms can be bent. However, the bending test strength of each manual test is different, and it is difficult to reach the same standard, which leads to low measurement accuracy.

[0003] There is no automatic testing mechanism for the durability of the folding arms or the degree of force applied to the bending, so it is very important to obtain an automatic arm folding machine that overcomes the above-mentioned defects. Summary of the invention

[0004] In order to solve at least one of the above technical problems, the present invention provides an automatic arm folding machine with testing and bending functions, comprising at least one workpiece limiting structure and at least one workpiece bending driving structure;

[0005] The workpiece bending drive structure includes a rotating shaft and a driving assembly fixed on the rotating shaft, and the driving assembly includes:

[0006] A fixing plate, on which at least one pressure sensor is fixed;

[0007] A movable plate, wherein the movable plate is fixed to a signal receiving end of the sensor;

[0008] The support assembly includes symmetrically arranged supports, and rotation grooves are provided on opposite sides of the supports;

[0009] The roller has connecting shafts on both sides thereof that match the rotating grooves;

[0010] The buffer assembly includes a buffer rod and a second guide rod fixed on the buffer rod. The movable plate is provided with a second guide channel. The second guide rod passes through the second guide channel and is fixed with a limiting ring. A buffer spring is provided on the outer sleeve of the second guide rod between the buffer rod and the movable plate.

[0011] It also includes a bending limit assembly connected to the workbench through a lifting structure, the bending limit assembly is arranged between the workpiece limit structure and the workpiece bending drive structure, the bending limit assembly includes a lifting plate installed on the workbench through the lifting structure, and the lifting structure can be an electric telescopic rod fixed to the inner wall of the workbench. The lifting plate is provided with:

[0012] A pair of first linear guide rails, with first bent support rods fixed on the first sliders of the two first linear guide rails;

[0013] At least one pair of second linear guides, each of the second linear guides has a driving screw with a first thread on the upper part and a second thread on the lower part, the first thread and the second thread are arranged in opposite directions, the first thread is externally engaged with the second slider, and the second thread is externally engaged with the third slider, the driving screw of the second linear guide rotates to control the second slider and the third slider to move in opposite or opposite directions, a second bent support rod is fixed between the two second sliders, a third bent support rod is fixed between the two third sliders, and the outer side surfaces of a first bent support rod and at least one second bent support rod and at least one third bent support rod form a bending angle control surface.

[0014] Through the above technical scheme, the present invention can also modify the machine for folding arm testing of the present invention into a bending machine for bending pipes or plates. For example, in the original state, the upper surface of the roller is located below the plate to be bent. When bending is required, the bending angle can be adjusted by the first linear guide rail, the first bending support rod, the second bending support rod and the third bending support rod on the second linear guide rail. Then the plate to be bent is inserted and installed, and then the connecting part is rotated, and the roller drives the plate to be bent to bend. During the bending process, the support cylinder can also be movably connected to the connecting part through a spring, and the support cylinder can partially support the pipe to be bent to increase the bending effect.

[0015] It also includes a control component, which includes a control chip. The output end of the control chip is connected to the electric drive component, and the pressure sensor is electrically connected to the input end of the control chip.

[0016] The electric components can be the electric components such as the motor, cylinder, linear guide rail, etc. used in the present invention. The first sensor and the second sensor are electrically connected to the input end of the control new product. When not working, the connecting piece blocks the first sensor. When the test is implemented, due to the bending test, the connecting piece rotates, and the first sensor cannot receive the signal, so a signal will be given to the control chip to complete a bending test.

[0017] The second sensor can be set at the extreme position of the connecting part when the two arms of the folding arm are fully folded. Then, when the connecting part reaches this position, the first sensor does not receive the blocking signal of the connecting part, and the second sensor receives the blocking signal of the connecting part, then a count of a complete test process is given to the control chip.

[0018] Through the above technical scheme, when the present invention is put into use, one of the arm bodies of the folding arm is limited and fixed on the workpiece limiting structure, and the other arm body is at least partially placed on the roller and / or buffer component of the workpiece bending drive structure. When the rotating shaft rotates, the other arm body of the folding arm can be driven to bend in the direction of one arm body, so that the folding performance of the folding arm can be tested.

[0019] Through the above technical solution, the setting of the roller can help the roller to roll in contact with the surface of one of the arms when bending, without damaging the arm; the buffer component can apply pressure to the arm in the folded state, so that the two can be folded more fully, increasing the credibility of the test.

[0020] The driving assembly is connected to the rotating shaft via a connecting rod assembly, which includes a plurality of parallel connecting rods having at least one bend, support rods are fixed between the plurality of parallel connecting rods, fixing plates are fixedly mounted on the plurality of connecting rods, and the connecting rods are fixed on the rotating shaft.

[0021] Through the above technical solution, the connecting rod has a partial bend, which can increase the stability and strength of the connecting rod.

[0022] The workpiece bending drive structure also includes a connecting rod support assembly, wherein the connecting rod support assembly includes an electric lifting rod fixed on one side of the workbench, and the output end of the electric lifting rod is fixedly connected to a support assembly longer than the support rod, and the support assembly includes a first support rod fixed to the output end of the electric lifting rod and a second support rod movably connected to the first support rod, a third guide rod is fixed on the second support rod, a third channel for the third guide rod to pass through is opened on the first support rod, a third limit plate is fixed after the third guide rod passes through the third channel, and a third buffer spring is provided on the outer sleeve of the third guide rod, the cross-section of the second support rod is elliptical, and the third guide rod is provided with four, which can not only increase the connection strength between it and the first support rod, but also its surface is an arc surface, which can reduce the contact area with the connecting member, and it is worth mentioning that in order to increase the supporting strength, a support plate can be integrally formed at the bottom of the connecting member, and reinforcing ribs can be installed between the side wall of the connecting member and the support plate.

[0023] The electric lifting rod can be fixed obliquely.

[0024] At least one first guide channel is formed on the fixed plate, and a first guide rod is fixed to the bottom of the movable plate. The first guide rod is at least partially located in the first guide channel.

[0025] The support is longitudinally provided with a slot matching the rotation slot, and the support located on both sides of the slot forms an elastic arm structure, and the elastic arm structure is provided with a transverse limiting hole, and the fastener passes through the two transverse limiting holes to deform the rotation slot to limit the connecting shaft.

[0026] The cross-sectional radius of the roller increases from the middle to the two ends; the outer cover of the buffer rod is provided with a protective cover. The first receiving head and the first driving head of the first sensor that cooperate with each other are respectively provided on the outer side of the buffer rod or the protective cover and the movable plate. The protective cover can be made of acrylic or other materials.

[0027] Through the above technical solution, the cross-sectional radius of the roller from the middle to both ends increases successively to adapt to the width of folding arms of various widths, and because the cross-sectional radius of the roller from the middle to both ends increases successively, the contact area with the folding arms can be reduced.

[0028] The workpiece limiting structure includes two guide rails, a first movable plate is fixed between the first sliders of the two guide rails, and a second movable plate is fixed between the second sliders of the two guide rails. Limiting components are fixed on both the first movable plate and the second movable plate. The limiting component includes a first limiting plate fixed to the first movable plate or the second movable plate, and a driving and telescopic mechanism. The output end of the driving and telescopic mechanism is fixedly connected to the second limiting plate, and the driving and telescopic mechanism controls the distance between the first limiting plate and the second limiting plate.

[0029] The driving telescopic mechanism can be a cylinder. Since the first movable plate and the second movable plate can move, they can be matched with folding arms of various lengths.

[0030] A buffer gasket is fixed on the first limiting plate and the second limiting plate; a long hole is opened on the first limiting plate, and the fastener is adjustably connected to the first movable plate and the second movable plate after passing through the long hole; at least one first cushion is fixed on the first movable plate and the second movable plate, and the second cushion is fixed on the workbench through a bracket, and the acting directions of the first cushion and the second cushion are perpendicular.

[0031] It also includes a driving mechanism for controlling the rotation of the rotating shaft, the driving structure includes relatively arranged support frames fixed on the workbench, both ends of the rotating shaft are respectively rotatably connected to the support frames, and also includes a driving motor fixed in the workbench, the support frame is also rotatably connected to a first rotating wheel, a worm is fixed at the center of the first rotating wheel, one end of the rotating shaft is meshed with the worm, and the driving motor is connected to the first rotating wheel belt.

[0032] The workbench is also provided with a second sensor and a third sensor, and the connecting rod at least partially forms a second driving end for triggering the second sensor.

[0033] When the present invention is put into use, if the pivot connection between the two arm bodies of the folding arm is equipped with a torsion spring, that is, the two arm bodies can be in an open state in a natural state, then one end of the arm body is limited and fixed by the driven telescopic mechanism, and the other end is unfolded in a natural state. When the rotating shaft rotates, the roller and / or the buffer rod contacts the arm body that is not limited and bends it toward the arm body that is limited and fixed, and the buffer rod will shrink. Then the first receiving head will receive the signal of the first driving head, so that the bending count can be realized, and the pressure sensor will receive the pressure to be borne during bending.

[0034] If the two arm bodies of the folding arm are pivotally connected but are not equipped with a torsion spring or other device, the arm body that is not limited by the driving telescopic mechanism can be installed on the connecting rod by a strap.

[0035] Compared with the prior art, the present invention has the following beneficial effects: the present invention adopts automatic assembly, can test the fatigue of the folding arm, and test the action cycle, can test until the arm fails, or set the number of tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The present invention is a three-dimensional Figure 1 ;

[0037] Figure 2 The present invention is a three-dimensional Figure 2 ;

[0038] Figure 3 It is a cross-sectional schematic diagram of the present invention;

[0039] Figure 4 is a three-dimensional diagram of the buffer assembly of the present invention;

[0040] Figure 5 is a schematic cross-sectional view of a buffer assembly of the present invention;

[0041] Figure 6 is a cross-sectional schematic diagram of a folding test of the present invention;

[0042] Figure 7 This is a cross-sectional diagram of the present invention. Figure 1 ;

[0043] Figure 8 This is a cross-sectional view of the present invention. Figure 2 ;

[0044] Fig. 9 This is a cross-sectional view of the present invention. Figure 3 ;

[0045] Fig.10This is a cross-sectional view of the present invention. Figure 4 ;

[0046] Fig.11 It is a control block diagram of the present invention.

[0047] Reference numerals:

[0048] 1 workpiece limiting structure; 101 guide rail; 102 first movable plate; 103 second movable plate; 104 first limiting plate; 105 driving telescopic mechanism; 106 second limiting plate; 107 buffer gasket; 108 long hole;

[0049] 201 rotating shaft; 202 driving assembly; 203 fixed plate; 204 first guide channel; 205 first guide rod; 206 pressure sensor; 207 movable plate; 208 bracket assembly; 209 support; 210 roller; 211 buffer assembly; 212 buffer rod; 213 second guide rod; 214 second guide channel; 215 limiting ring; 216 buffer spring; 217 connecting rod; 218 supporting rod; 219 slot; 220 rotating groove; 221 transverse limiting hole; 222 protective cover; 223 first receiving head; 224 first driving head; 225 supporting plate; 226 reinforcing rib; 227 supporting cylinder;

[0050] 301 a first cushion; 302 a second cushion; 303 a second sensor; 304 a third sensor;

[0051] 401 one of the arms; 402 another arm;

[0052] 501 support frame; 502 driving motor; 503 first rotating wheel; 504 worm;

[0053] 601 lifting plate; 602 first linear guide rail; 603 first bending support rod; 604 second linear guide rail; 605 second bending support rod; 606 third bending support rod; 607 bending angle control surface;

[0054] 701 control chip; 702 electric lifting rod; 703 first supporting rod; 704 third guide rod; 705 third buffer spring; 706 second supporting rod;

[0055] 8 Sheet material to be bent. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of the protection claimed in the present invention, the present invention is described in detail with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementations of the present invention, which are only some embodiments of the present invention, wherein the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention.

[0057] Referring to the accompanying drawings, the present invention adopts the following technical solution: an automatic arm folding machine, comprising at least one workpiece limiting structure 1 and at least one workpiece bending driving structure;

[0058] The workpiece bending drive structure includes a rotating shaft 201 and a driving assembly 202 fixed on the rotating shaft 201. The driving assembly 202 includes:

[0059] A fixed plate 203, on which at least one pressure sensor 206 is fixed;

[0060] A movable plate 207, wherein the movable plate 207 is fixed to a signal receiving end of the sensor;

[0061] The support assembly 208 includes symmetrically arranged supports 209, and a rotation slot 220 is formed on the opposite side of the supports 209;

[0062] The roller 210 has connecting shafts on both sides thereof that match the rotating groove 220;

[0063] The buffer assembly 211 includes a buffer rod 212 and a second guide rod 213 fixed on the buffer rod 212. A second guide channel 214 is opened on the movable plate 207. The second guide rod 213 passes through the second guide channel 214 and is fixed with a limiting ring 215. A buffer spring 216 is provided on the outer sleeve of the second guide rod 213 between the buffer rod 212 and the movable plate 207.

[0064] Through the above technical solution, when the present invention is put into use, one of the arm bodies 401 of the folding arm is limited and fixed on the workpiece limiting structure 1, and the other arm body 402 is at least partially placed on the roller 210 and / or the buffer assembly 211 of the workpiece bending drive structure. When the rotating shaft 201 rotates, the other arm body 402 of the folding arm can be driven to bend in the direction of one arm body, so that the folding performance of the folding arm can be tested.

[0065] Through the above technical solution, the setting of the roller 210 can help the roller 210 to roll in contact with the surface of one of the arms when bending, without damaging the arm; the buffer component 211 can apply pressure to the arm in the folded state, so that the two can be folded more fully, increasing the credibility of the test.

[0066] It also includes a bending limit assembly connected to the workbench through a lifting structure, the bending limit assembly is arranged between the workpiece limit structure and the workpiece bending drive structure, the bending limit assembly includes a lifting plate 601 which is lifted and lowered on the workbench through the lifting structure, and the lifting plate 601 is provided with:

[0067] A pair of first linear guide rails 602, with first bent support rods 603 fixed on the first sliders of the two first linear guide rails 602;

[0068] At least one pair of second linear guides 604, each of the driving screws of the second linear guides 604 has a first thread on the upper part and a second thread on the lower part, the first thread and the second thread are arranged in opposite directions, the first thread is externally engaged with the second slider, and the second thread is externally engaged with the third slider, the driving screw of the second linear guide 604 rotates to control the second slider and the third slider to move in opposite or opposite directions, a second bending support rod 605 is fixed between the two second sliders, a third bending support rod 606 is fixed between the two third sliders, and the outer side surfaces of a first bending support rod 603 and at least one second bending support rod 605 and at least one third bending support rod 606 form a bending angle control surface 607.

[0069] Through the above technical scheme, the present invention can also modify the machine for folding arm testing of the present invention into a bending machine for bending pipes or plates. For example, in the original state, the upper surface of the roller is located below the plate 8 to be bent. When bending is required, the bending angle can be adjusted by the first bending support rod 603, the second bending support rod 605 and the third bending support rod 606 on the first linear guide 602 and the second linear guide 604. Then the connecting part rotates, and the roller drives the plate 8 to be bent to bend. During the bending process, the support cylinder 227 can also be movably connected to the connecting part through a spring, and the support cylinder 227 can partially support the pipe to be bent to increase the bending effect.

[0070] It also includes a control component, which includes a control chip 701 . The output end of the control chip 701 is connected to the electric drive component, and the pressure sensor is electrically connected to the input end of the control chip 701 .

[0071] The electric components can be electric components such as motors, cylinders, linear guides, etc. used in the present invention. The first sensor and the second sensor are electrically connected to the input end of the control new product. When not working, the connecting piece blocks the first sensor. When the test is implemented, due to the bending test, the connecting piece rotates, and the first sensor cannot receive a signal, so a signal is given to the control chip 701 to complete a bending test.

[0072] The second sensor can be set at the extreme position where the connecting part is when the two arms of the folding arm are fully folded. Then, when the connecting part reaches this position, the first sensor does not receive a blocking signal from the connecting part, and the second sensor receives a blocking signal from the connecting part. Then, a count of a complete test process is given to the control chip 701.

[0073] The driving assembly 202 is connected to the rotating shaft 201 via a connecting rod assembly, which includes a plurality of parallel connecting rods 217 having at least one bend, a supporting rod 218 is fixed between the plurality of parallel connecting rods 217, a fixing plate 203 is fixedly mounted on the plurality of connecting rods 217, and the connecting rods 217 are fixed on the rotating shaft 201.

[0074] Through the above technical solution, the connecting rod 217 is partially bent, which can increase the stability and strength of the connecting rod 217.

[0075] The workpiece bending drive structure also includes a connecting rod support assembly, which includes an electric lifting rod 702, the output end of which is fixedly connected to a support assembly longer than the support rod, the support assembly includes a first support rod 703 fixed to the output end of the electric lifting rod 702 and a second support rod 706 movably connected to the first support rod 703, a third guide rod 704 is fixed to the second support rod 706, a third channel for the third guide rod 704 to pass through is opened on the first support rod 703, and the third guide rod 704 is provided on the first support rod 703. The three guide rods 704 pass through the third channel to fix the third limit plate. The third guide rod 704 is provided with a third buffer spring 705 on its outer sleeve. The cross-section of the second support rod 706 is elliptical. The third guide rod 704 is provided with four, which can not only increase the connection strength between it and the first support rod 703, but also its surface is an arc surface, which can reduce the contact area with the connecting piece. It is worth mentioning that in order to increase the supporting strength, a supporting plate 225 can be integrally formed at the bottom of the connecting piece, and a reinforcing rib 226 can be installed between the side wall of the connecting piece and the supporting plate 225.

[0076] At least one first guide channel 204 is defined on the fixed plate 203 , and a first guide rod 205 is fixed to the bottom of the movable plate. The first guide rod 205 is at least partially located in the first guide channel 204 .

[0077] The support 209 is longitudinally provided with a slot 219 that cooperates with the rotating slot 220. The support 209 located on both sides of the slot 219 forms an elastic arm structure, and the elastic arm structure is provided with a transverse limiting hole 221. The fastener passes through the two transverse limiting holes 221 to deform the rotating slot 220 to limit the connecting shaft.

[0078] The cross-sectional radius of the roller 210 increases from the middle to the two ends; the buffer rod 212 is covered with a protective cover 222. The buffer rod 212 or the protective cover 222 and the movable plate 207 are respectively provided with a first receiving head 223 and a first driving head 224 of a first sensor that cooperate with each other. The protective cover 222 can be made of acrylic or other materials.

[0079] Through the above technical solution, the cross-sectional radius of the roller 210 from the middle to both ends increases successively to adapt to the width of folding arms of various widths, and because the cross-sectional radius of the roller 210 from the middle to both ends increases successively, the contact area with the folding arms can be reduced.

[0080] The workpiece limiting structure 1 includes two guide rails 101, a first movable plate 102 is fixed between the first sliders of the two guide rails 101, and a second movable plate 103 is fixed between the second sliders of the two guide rails 101. Limiting components are fixed on the first movable plate 102 and the second movable plate 103. The limiting components include a first limiting plate 104 fixed to the first movable plate 102 or the second movable plate 103, and a driving and telescopic mechanism 105. The output end of the driving and telescopic mechanism 105 is fixedly connected to the second limiting plate 106. The driving and telescopic mechanism 105 controls the distance between the first limiting plate 104 and the second limiting plate 106.

[0081] The driving telescopic mechanism 105 may be a cylinder. Since the first movable plate 102 and the second movable plate 103 can be moved, they can be matched with folding arms of various lengths.

[0082] A buffer gasket 107 is fixed on the first limiting plate 104 and the second limiting plate 106; a long hole 108 is opened on the first limiting plate 104, and the fastener passes through the long hole 108 and is adjustably connected to the first movable plate 102 and the second movable plate 103; at least one first cushion 301 is fixed on the first movable plate 102 and the second movable plate 103, and the second cushion 302 is fixed on the workbench by a bracket, and the acting directions of the first cushion 301 and the second cushion 302 are perpendicular.

[0083] It also includes a driving mechanism for controlling the rotation of the rotating shaft 201, and the driving structure includes relatively arranged support frames 501 fixed on the workbench, and both ends of the rotating shaft 201 are respectively rotatably connected to the support frames 501, and also includes a driving motor 502 fixed in the workbench, and the support frame 501 is also rotatably connected to the first rotating wheel 503, and a worm 504 is fixed at the center of the first rotating wheel 503, one end of the rotating shaft 201 is meshed with the worm 504, and the driving motor 502 is connected to the first rotating wheel 503 by a belt.

[0084] A second sensor 303 and a third sensor 304 are also provided on the workbench, and the connecting rod 217 at least partially forms a second driving end for triggering the second sensor 303 .

[0085] When the present invention is put into use, if the pivot connection between the two arm bodies of the folding arm is equipped with a torsion spring, that is, the two arms can be in an open state in a natural state, then one end of the arm body is limited and fixed by the driven telescopic mechanism 105, and the other end is unfolded in a natural state. When the rotating shaft 201 rotates, the roller 210 and / or the buffer rod 212 contacts the arm body that is not limited and bends it toward the arm body that is limited and fixed, and the buffer rod 212 will shrink. Then the first receiving head 223 will receive the signal of the first driving head 224, so as to realize bending counting, etc., and the pressure sensor 206 will receive the pressure to be borne during bending.

[0086] If the two arms of the folding arm are pivotally connected but are not equipped with a torsion spring or other device, the arm that is not limited by the drive telescopic mechanism 105 can be installed on the connecting rod 217 by a strap.

[0087] Compared with the prior art, the present invention has the following beneficial effects: the present invention adopts automatic assembly, can test the fatigue of the folding arm, and test the action cycle, can test until the arm fails, or set the number of tests.

[0088] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An automatic arm folding machine, characterized in that: It comprises at least one workpiece limiting structure (1) and at least one workpiece bending driving structure; The workpiece bending drive structure comprises a rotating shaft (201), a driving assembly (202) fixed on the rotating shaft (201), and the driving assembly (202) comprises: A fixed plate (203), on which at least one pressure sensor (206) is fixed; A movable plate (207), wherein the movable plate (207) is fixed to a signal receiving end of the sensor; The support assembly (208) includes symmetrically arranged supports (209), and the supports (209) are provided with rotation grooves (220) on opposite sides thereof; A roller (210), with connecting shafts matching the rotating groove (220) arranged on both sides of the roller (210); A buffer assembly (211) comprises a buffer rod (212) and a second guide rod (213) fixed on the buffer rod (212); a second guide channel (214) is provided on the movable plate (207); the second guide rod (213) passes through the second guide channel (214) and is fixed with a limit ring (215); a buffer spring (216) is provided on the outer sleeve of the second guide rod (213) between the buffer rod (212) and the movable plate (207); The device further comprises a bending limit assembly connected to the workbench via a lifting structure, the bending limit assembly being arranged between the workpiece limit structure and the workpiece bending drive structure, the bending limit assembly comprising a lifting plate (601) which is liftably mounted on the workbench via the lifting structure, and the lifting plate (601) is provided with: A pair of first linear guide rails (602), wherein first sliding blocks of the two first linear guide rails (602) are fixed with first bent support rods (603); At least one pair of second linear guide rails (604), the driving screw of each second linear guide rail (604) has a first thread on the upper part and a second thread on the lower part, the first thread and the second thread are arranged in opposite directions, the first thread is externally engaged with the second slider, and the second thread is externally engaged with the third slider, the driving screw of the second linear guide rail (604) rotates to control the second slider and the third slider to move in opposite or opposite directions, a second bending support rod (605) is fixed between the two second sliders, a third bending support rod (606) is fixed between the two third sliders, and the outer side surfaces of a first bending support rod (603) and at least one second bending support rod (605) and at least one third bending support rod (606) form a bending angle control surface (607); It also includes a control component, which includes a control chip (701), the output end of the control chip (701) is connected to the electric drive component, and the pressure sensor is electrically connected to the input end of the control chip (701).

2. The automatic arm folding machine according to claim 1, characterized in that: The driving assembly (202) is connected to the rotating shaft (201) via a connecting rod assembly, the connecting rod assembly comprising a plurality of parallel connecting rods (217) having at least one bend, a supporting rod (218) being fixed between the plurality of parallel connecting rods (217), a fixing plate (203) being fixedly mounted on the plurality of connecting rods (217), and the connecting rods (217) being fixed on the rotating shaft (201).

3. The automatic arm folding machine according to claim 1, characterized in that: At least one first guide channel (204) is provided on the fixed plate (203), a first guide rod (205) is fixed to the bottom of the movable plate, and the first guide rod (205) is at least partially located in the first guide channel (204).

4. The automatic arm folding machine according to claim 1, characterized in that: The support (209) is longitudinally provided with a slot (219) that matches the rotation slot (220), and the support (209) located on both sides of the slot (219) forms an elastic arm structure, and a transverse limiting hole (221) is provided on the elastic arm structure. The fastener passes through the two transverse limiting holes (221) to deform the rotation slot (220) to limit the connecting shaft.

5. The automatic arm folding machine according to claim 1, characterized in that: The cross-sectional radius of the roller (210) increases gradually from the middle to both ends; and a protective sleeve (222) is disposed on the outer cover of the buffer rod (212).

6. The automatic arm folding machine according to claim 5, characterized in that: A first receiving head (223) and a first driving head (224) of a first sensor that cooperate with each other are respectively provided outside the buffer rod (212) or the protective cover (222) and on the movable plate (207).

7. The automatic arm folding machine according to claim 1, characterized in that: The workpiece limiting structure (1) comprises two guide rails (101), a first movable plate (102) is fixed between the first sliders of the two guide rails (101), a second movable plate (103) is fixed between the second sliders of the two guide rails (101), and limiting components are fixed on both the first movable plate (102) and the second movable plate (103), the limiting components comprising a first limiting plate (104) fixed to the first movable plate (102) or the second movable plate (103), and a driving telescopic mechanism (105), the output end of the driving telescopic mechanism (105) being fixedly connected to the second limiting plate (106), and the driving telescopic mechanism (105) controlling the distance between the first limiting plate (104) and the second limiting plate (106).

8. The automatic arm folding machine according to claim 7, characterized in that: A buffer gasket (107) is fixed on the first limiting plate (104) and the second limiting plate (106); The first limiting plate (104) is provided with a long hole (108), and the fastener passes through the long hole (108) to be adjustably connected with the first movable plate (102) and the second movable plate (103); At least one first cushion (301) is fixed on the first movable plate (102) and the second movable plate (103), and the second cushion (302) is fixed on the workbench via a bracket, and the action directions of the first cushion (301) and the second cushion (302) are perpendicular.

9. The automatic arm folding machine according to claim 1, characterized in that: It also includes a driving mechanism for controlling the rotation of the rotating shaft (201), the driving structure including supporting frames (501) fixed on the workbench and arranged opposite to each other, the two ends of the rotating shaft (201) are respectively rotatably connected to the supporting frames (501), and also includes a driving motor (502) fixed in the workbench, the supporting frame (501) is also rotatably connected to a first rotating wheel (503), a worm (504) is fixed at the center of the first rotating wheel (503), one end of the rotating shaft (201) is meshed with the worm (504), and the driving motor (502) is connected to the first rotating wheel (503) by a belt.

10. The automatic arm folding machine according to claim 2, characterized in that: A second sensor (303) and a third sensor (304) are also provided on the workbench, and the connecting rod (217) at least partially forms a second driving end for triggering the second sensor (303).

Images