Fool-proof structure for rotationally advancing and linearly retreating

Abstract

The fool-proof structure comprises a base, a sliding seat movably matched on the base and a swing arm hinged to the sliding seat through a hinge shaft, a pressing block is arranged at the free end of the swing arm, a front limiting block and a rear limiting block which are used for limiting the displacement amplitude of the sliding seat are arranged on the base, and a guide support is fixed to the base. The guide support is provided with a horizontal guide strip, a guide platform and a plunger, the horizontal guide strip is located above the guide platform, the plunger is located at the front end of the horizontal guide strip, a guide block is fixed to the swing arm, a traction hole is formed in the swing arm, and the guide block can pass through a gap between the horizontal guide strip and the guide platform. Under the driving of the traction device, the guide block sequentially passes through a guide gap formed by the upper part of the horizontal guide strip, the plunger, the lower part of the horizontal guide strip and the guide platform and then resets, so that the swing arm is formed to swing forwards and downwards and then linearly retreat, a product is pre-bent, and the product quality and the processing efficiency are favorably improved.

Description

Technical Field

[0001] The invention relates to product processing equipment, specifically a product bending device. Background Art

[0002] During production, the wire strip needs to be bent, such as Figures 1 to 3 As shown, the wire row is placed on a pair of movable blocks, with a gap between the pair of movable blocks. The pressing block descends and acts on the portion of the wire row above the gap, pressing the portion of the wire row down into the gap between the pair of movable blocks, and the wire row is initially bent. Afterwards, the pair of movable blocks are driven by a linear drive unit (such as a cylinder) to move toward each other, squeezing the initially bent wire row, and the wire row is finally bent. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a structure for preliminary bending of a wire row.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: a fool-proof structure for rotating forward and linearly retreating, comprising a base, a sliding seat movably fitted on the base, a swing arm hinged on the sliding seat through a hinge shaft, a pressure block being arranged at the free end of the swing arm, a front limit block and a rear limit block for limiting the displacement of the sliding seat being arranged on the base, a guide bracket being fixed on the base, the guide bracket being provided with a horizontal guide bar, a guide platform and a plunger, the horizontal guide bar being located above the guide platform, the plunger being located at the front end of the horizontal guide bar, a guide block being fixed on the swing arm, a traction hole being provided on the swing arm, and the guide block being able to pass through the gap between the horizontal guide bar and the guide platform; when the sliding seat abuts against the rear limit block, the distance between the hinge shaft and the guide block is equal to or less than the distance between the hinge shaft and the rear end of the horizontal guide bar, and when the sliding seat abuts against the front limit block, the distance between the hinge shaft and the guide block is equal to the distance between the hinge shaft and the plunger.

[0005] A traction device is arranged on the side of the base, and the traction device includes a traction rod and a traction block. A vertical guide groove is provided on the side wall of the traction block, and a sliding block is matched in the vertical guide groove. The traction rod is fixed to the sliding block, and the traction rod is arranged horizontally. The free end of the traction rod is matched in the traction hole of the swing arm. The traction block is connected to a linear drive unit, such as a cylinder or a screw mechanism. Driven by the linear drive unit, the traction block moves linearly forward and backward, and the traction rod moves accordingly.

[0006] Initially, the slide is against the rear limit block, and the swing arm is in the rear swing position. Driven by the traction rod, the swing arm swings forward and the slide moves forward. Although the distance between the hinge shaft and the guide block is equal to or less than the distance between the hinge shaft and the rear end of the horizontal guide bar when the slide is against the rear limit block, the swing arm swings forward and the slide moves forward synchronously under the drive of the traction rod, shortening the distance between the guide block and the rear end of the horizontal guide bar. Therefore, the swing arm swinging forward can press the guide block against the horizontal guide bar. Driven by the traction rod, the slide moves forward, and the guide block moves forward along the upper surface of the horizontal guide bar. When the slide is against the front limit block, since the distance between the hinge shaft and the guide block is equal to the distance between the hinge shaft and the plunger, and the plunger is located at the front end of the horizontal guide bar, after the guide block is separated from the horizontal guide bar at the front end of the horizontal guide bar, the swing arm swings downward, the guide block acts on the plunger, and the plunger retracts into the guide bracket. After the guide block passes over the plunger, the plunger pops out of the guide bracket to limit the guide block and prevent the guide block from returning to the original path. Since the slide is against the front limit block, the slide cannot move forward, and the traction rod continues to drive the swing arm forward. Therefore, the swing arm continues to swing down until the swing arm tends to be horizontal. The process of the swing arm swinging down is the process of the upper pressure block of the swing arm pressing the wire row down. The pressure block presses the wire row into the gap between a pair of movable blocks, and the wire row is initially bent.

[0007] When a pair of movable blocks move toward each other to bend the wire row, the traction rod retreats and drives the swing arm to retreat. Due to the limit of the guide block by the plunger, the guide block cannot return to the original path, so the guide block is forced to enter the gap between the horizontal guide strip and the guide platform. The traction rod continues to retreat, and the guide block retreats linearly along the gap between the horizontal guide strip and the guide platform. In this way, the pressure block on the swing arm withdraws from the bent wire row in a straight line, so that the effect of the initial bending of the wire row is retained, which facilitates the subsequent pair of movable blocks to squeeze the wire row towards each other for the final bending, which is beneficial to improving the bending effect of the wire row and also to improving the bending efficiency of the wire row. Because when the slide seat abuts against the rear limit block, the distance between the hinge shaft and the guide block is equal to or less than the distance between the hinge shaft and the rear end of the horizontal guide strip, therefore, when the traction rod continues to retreat, when the slide seat abuts against the rear limit block, the guide block can withdraw from the gap between the horizontal guide strip and the guide platform. After the guide block exits the gap between the horizontal guide strip and the guide platform, the traction rod continues to retreat, the slide cannot retreat, and the swing arm swings backward to return to the initial state.

[0008] As an improvement, the rounded corner at the rear end of the horizontal guide strip helps the guide block to escape from the gap between the horizontal guide strip and the guide platform when retreating.

[0009] As an improvement, in the traction device, a telescopic spring is arranged in the vertical guide groove, the top end of the telescopic spring is abutted against the top end of the vertical guide groove, and the bottom end of the telescopic spring is abutted against the sliding block. In this way, under the elastic force of the telescopic spring, the sliding block has a tendency to move downward along the vertical guide groove, which is conducive to the swing arm swinging downward (i.e., the swing arm swings forward) after the guide block on the swing arm moves forward out of the gap between the horizontal guide bar and the guide platform.

[0010] The base is provided with a slide rail, the slide rail is matched with a slide block, and the slide seat is installed on the slide block.

[0011] The front limit block is provided with a front limit block magnet, the rear limit block is provided with a rear limit block magnet, the front end of the slide is provided with a front magnet, and the rear end of the slide is provided with a rear magnet. The front magnet can be attracted to the front limit block magnet, and the rear magnet can be attracted to the rear limit block magnet. The attraction between the magnets ensures that the slide and the rear limit block / front limit block are stably close together, providing a guarantee for the accuracy of the forward and backward displacement of the slide. When the traction rod pulls the swing arm forward, the attraction between the rear magnet and the rear limit block magnet is destroyed, and the slide leaves the rear limit block and moves forward.

[0012] The front end of the horizontal guide strip is provided with an arc-shaped ramp, which provides space for the guide block to move forward and downward, so that it can smoothly contact the plunger.

[0013] The horizontal guide bar is fixed on the side wall of the guide bracket, the plunger protrudes from the side wall of the guide bracket, and the end face of the free end of the guide block is inclined. When the guide block moves forward and downward with the swing arm, the inclined end face of the guide block contacts the protrusion of the plunger and presses it into the guide bracket. After the guide block passes over the protrusion of the plunger, the protrusion of the plunger pops out of the side wall of the guide bracket, blocking the guide block from returning to the original path.

[0014] The guide block is fixed on the swing arm at an angle. When the guide block is in a horizontal position, the angle between the swing arm and the horizontal plane is greater than zero degrees. The angle is small, such as 0.5 degrees or 1 degree. In this way, when the swing arm and the guide block retreat, the guide block retreats horizontally along the gap between the horizontal guide strip and the guide platform, while the swing arm maintains an angle greater than zero degrees with the horizontal plane. After the guide block leaves the gap between the horizontal guide strip and the guide platform, the swing arm can smoothly swing backward and upward under the drive of the traction rod.

[0015] A locking block groove is provided on the guide platform, and a locking block is hinged in the locking block groove. The locking block is L-shaped, and the middle part of the locking block is hinged to the guide bracket. A counterweight hole is provided at one end of the locking block, and the end is located at the bottom and abuts against the bottom surface of the locking block groove. The other end of the locking block is located at the top and protrudes upward from the guide platform. A counterweight block is installed in the counterweight hole. When not subject to external force, the end of the locking block provided with the counterweight hole is kept pressed against the bottom surface of the locking block groove, so that the other end of the locking block keeps protruding from the guide platform, blocking the passage between the horizontal guide strip and the guide platform, and preventing the guide block from mistakenly entering the gap between the horizontal guide strip and the guide platform when the slide moves forward. When the slide moves backward, the retracted guide block can move the locking block, and the upper end of the locking block sinks into the locking block groove, allowing the guide block to pass.

[0016] One end of the swing arm hinged to the slide seat is provided with a rearward swing limiting convex portion, which can abut against the slide seat to limit the rearward swing amplitude of the swing arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings:

[0018] Figure 1 is a schematic diagram of a line row placed on a pair of movable blocks 50;

[0019] Figure 2 for Figure 1 Left view of

[0020] Figure 3 It is a schematic diagram of the pressing head pressing the wire row down into between a pair of movable blocks 50;

[0021] Figure 4 This is a schematic diagram of the foolproof structure for rotating forward and linear backward;

[0022] Figure 5 A schematic diagram of another perspective of the fool-proof structure;

[0023] Figure 6 The schematic diagram is that the slide 20 moves forward, the swing arm 30 swings forward, and the guide block 33 presses against the horizontal guide bar 41;

[0024] Figure 7 for Figure 6 Schematic diagram of the foolproof structure observed from the rear;

[0025] Figure 8 It is a schematic diagram of the guide block 33 moving along the horizontal guide strip 41;

[0026] Fig. 9 Schematic diagram of the guide block 33 leaving the horizontal guide bar 41 but not yet contacting the plunger 43;

[0027] Fig.10 It is a schematic diagram of the guide block 33 pressing against the guide platform 42 after passing over the plunger 43;

[0028] Fig.11 Schematic diagram of the guide block 33 retreating along the gap between the horizontal guide strip 41 and the guide platform 42;

[0029] Fig.12 Schematic diagram of the guide block 33 moving backward out of the gap between the horizontal guide strip 41 and the guide platform 42;

[0030] Fig.13 is a schematic diagram of the swing arm 30 swinging backward;

[0031] Fig.14 Schematic diagram of the locking block 44.

[0032] Explanation of symbols in the figure:

[0033] 10. Base; 11. Slide rail; 12. Slider;

[0034] 20. Sliding seat; 21. Front limit block; 22. Rear limit block;

[0035] 30. swing arm; 31. hinge shaft; 32. pressure block; 33. guide block; 330. end surface of the free end of the guide block; 34. traction hole; 35. rear swing limit convex part;

[0036] 40. guide bracket; 41. horizontal guide strip; 411. arc ramp; 42. guide platform; 43. plunger; 44. locking block; 441. counterweight hole; 45. locking block slot;

[0037] 50. Activity block;

[0038] 60. Line arrangement. DETAILED DESCRIPTION

[0039] Combination Figure 4 , Figure 5 A fool-proof structure for rotating forward and linearly retreating includes a base 10, a slide 20 movably fitted on the base, a swing arm 30 hinged on the slide through a hinge shaft 31, a pressure block 32 is arranged at the free end of the swing arm, a front limit block 21 and a rear limit block 22 for limiting the displacement of the slide are arranged on the base, a guide bracket 40 is fixed on the base, the guide bracket is provided with a horizontal guide bar 41, a guide platform 42 and a plunger 43, the horizontal guide bar is located above the guide platform, the plunger is located at the front end of the horizontal guide bar, a guide block 33 is fixed on the swing arm, a traction hole 34 is arranged on the swing arm, and the guide block can pass through the gap between the horizontal guide bar and the guide platform.

[0040] When the slide 20 abuts against the rear limit block 22, the distance between the hinge shaft 31 and the guide block 33 is equal to or less than the distance between the hinge shaft 31 and the rear end of the horizontal guide strip 41; when the slide 20 abuts against the front limit block 21, the distance between the hinge shaft 31 and the guide block 33 is equal to the distance between the hinge shaft and the plunger 43.

[0041] A traction device is arranged on the side of the base 10, and the traction device includes a traction rod and a traction block. A vertical guide groove is provided on the side wall of the traction block, and a sliding block is matched in the vertical guide groove. The traction rod is fixed to the sliding block, and the traction rod is arranged horizontally. The free end of the traction rod is matched in the traction hole 34 of the swing arm. The traction block is connected to a linear drive unit, such as a cylinder or a screw mechanism. Under the drive of the linear drive unit, the traction block moves linearly forward and backward, and the traction rod moves accordingly.

[0042] refer to Figures 6 to 10 Initially, the slide 20 abuts against the rear limit block 22, and the swing arm 30 is in the rear swing position. Driven by the traction rod, the swing arm 30 swings forward and the slide 20 moves forward. Although the distance between the hinge shaft 31 and the guide block 33 is equal to or less than the distance between the hinge shaft and the rear end of the horizontal guide strip 41 when the slide abuts against the rear limit block 22, the swing arm 30 swings forward and the slide 20 moves forward synchronously under the drive of the traction rod, shortening the distance between the guide block 33 and the rear end of the horizontal guide strip 41. Therefore, the swing arm 30 swinging forward can press the guide block 33 against the horizontal guide strip 41. Driven by the traction rod continuously, the slide 20 moves forward, and the guide block 33 moves forward along the upper surface of the horizontal guide strip 41. When the slide 20 abuts against the front limit block 21, since the distance between the hinge shaft 31 and the guide block 33 is equal to the distance between the hinge shaft and the plunger 43, and the plunger is located at the front end of the horizontal guide bar 41, after the guide block 33 is separated from the horizontal guide bar at the front end of the horizontal guide bar 41, the swing arm 30 swings downward, the guide block 33 acts on the plunger 43, and the plunger retracts into the guide bracket 40. After the guide block 33 passes over the plunger 43, the plunger pops out of the guide bracket 40 to limit the guide block 33 and prevent the guide block from returning to the original path. Since the slide 20 abuts against the front limit block 21, the slide cannot move forward, and the traction rod continues to drive the swing arm 30 forward, so the swing arm continues to swing down until the swing arm tends to be horizontal. The process of the swing arm 30 swinging down is the process of the upper pressure block 32 of the swing arm pressing the wire row down. The pressure block 32 presses the wire row into the gap between a pair of movable blocks 50, and the wire row 60 is initially bent.

[0043] refer to Figures 11 to 13When a pair of movable blocks 50 move toward each other to bend the wire row 60, the traction rod retreats, driving the swing arm 30 to retreat. Due to the limitation of the guide block 33 by the plunger 43, the guide block 33 cannot return to the original path, so the guide block 33 is forced to enter the gap between the horizontal guide bar 41 and the guide platform 42. The traction rod continues to retreat, and the guide block 33 retreats linearly along the gap between the horizontal guide bar 41 and the guide platform 42. In this way, the pressing block 32 on the swing arm 30 withdraws from the bent wire row 60 in a straight line, so that the effect of the initial bending of the wire row is retained, which provides convenience for the subsequent pair of movable blocks 50 to squeeze the wire row toward each other for the final bending, which is beneficial to improving the bending effect of the wire row and also to improving the bending efficiency of the wire row. Since the distance between the articulated shaft 31 and the guide block 33 is equal to or less than the distance between the articulated shaft 31 and the rear end of the horizontal guide bar 41 when the slide 20 abuts against the rear limit block 22, the guide block 33 can retreat from the gap between the horizontal guide bar 41 and the guide platform 42 when the traction rod continues to retreat and the slide 20 abuts against the rear limit block 22. After the guide block 33 retreats from the gap between the horizontal guide bar 41 and the guide platform 42, the traction rod continues to retreat, the slide 20 cannot retreat, and the swing arm 30 swings backward to return to the initial state.

[0044] As an improvement, Figure 4 The rounded corner at the rear end of the horizontal guide strip 41 helps the guide block 33 to escape from the gap between the horizontal guide strip 41 and the guide platform 42 when retreating.

[0045] As an improvement, in the traction device, a telescopic spring is arranged in the vertical guide groove, the top end of the telescopic spring is abutted against the top end of the vertical guide groove, and the bottom end of the telescopic spring is abutted against the sliding block. In this way, under the elastic force of the telescopic spring, the sliding block has a tendency to move downward along the vertical guide groove. This tendency is conducive to the swing arm to swing downward after the guide block on the swing arm moves forward out of the gap between the horizontal guide bar and the guide platform.

[0046] like Figure 4 A slide rail 11 is provided on the base 10, a slider 12 is matched on the slide rail, and a slide seat 20 is installed on the slider.

[0047] The front limit block 21 is provided with a front limit block magnet, the rear limit block 22 is provided with a rear limit block magnet, the front end of the slide 20 is provided with a front magnet, and the rear end of the slide is provided with a rear magnet. The front magnet can be attracted to the front limit block magnet, and the rear magnet can be attracted to the rear limit block magnet. The attraction between the magnets ensures that the slide 20 and the rear limit block 22 / front limit block 21 are stably close together, providing a guarantee for the accuracy of the forward and backward displacement of the slide 20. When the traction rod pulls the swing arm forward, the attraction between the rear magnet and the rear limit block magnet is destroyed, and the slide 20 leaves the rear limit block 22 and moves forward.

[0048] The front end of the horizontal guide strip 41 is provided with an arc-shaped ramp 411. The arc-shaped ramp 411 provides a space for the guide block 33 to move forward and downward, so that it can contact the plunger 43 smoothly.

[0049] The horizontal guide bar 41 is fixed on the side wall of the guide bracket 40, the plunger 43 protrudes from the side wall of the guide bracket, and the end surface of the free end of the guide block 33 is inclined. When the guide block 33 moves forward and downward with the swing arm 30, the inclined end surface of the guide block contacts the protrusion of the plunger 43 and presses it into the guide bracket 40. After the guide block 33 passes over the protrusion of the plunger, the protrusion of the plunger pops out of the side wall of the guide bracket, blocking the guide block 33 from returning to the original path.

[0050] The guide block 33 is fixed on the swing arm 30 at an angle. When the guide block is in a horizontal position, the angle between the swing arm and the horizontal plane is greater than zero. When the swing arm 30 and the guide block 33 retreat, the guide block 33 retreats horizontally along the gap between the horizontal guide bar 41 and the guide platform 42, while the swing arm 30 maintains an angle greater than zero with the horizontal plane. After the guide block 33 is separated from the gap between the horizontal guide bar 41 and the guide platform 42, the swing arm 30 can smoothly swing backward and upward under the drive of the traction rod.

[0051] Combination Figure 4 , Fig.14 The guide platform 42 is provided with a locking block groove 45, in which a locking block 44 is hinged. The locking block is L-shaped, and the middle part of the locking block is hinged with the guide bracket 40. One end of the locking block is provided with a counterweight hole 441, which is located at the bottom and abuts against the bottom surface of the locking block groove. The other end of the locking block is located at the top and protrudes upward from the guide platform 42. A counterweight is installed in the counterweight hole 441. When no external force is applied, one end of the locking block 44 provided with the counterweight hole 441 is kept pressed against the bottom surface of the locking block groove 45, so that the other end of the locking block 44 keeps protruding from the guide platform 42, blocking the passage between the horizontal guide strip 41 and the guide platform 42, and preventing the guide block 33 from mistakenly entering the gap between the horizontal guide strip 41 and the guide platform 42 when the slide 20 moves forward. When the slide 20 moves backward, the retreating guide block 33 can move the locking block 44, and the upper end of the locking block is immersed in the locking block groove 45, allowing the guide block 33 to pass.

[0052] like Figure 5 One end of the swing arm 30 hinged to the slide 20 is provided with a rearward swing limiting protrusion 35, which can abut against the slide to limit the rearward swing amplitude of the swing arm 30.

[0053] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A foolproof structure for rotating forward and linearly retreating, comprising a base (10), a slide seat (20) movably matched on the base, a swing arm (30) hinged on the slide seat through a hinge shaft (31), a pressure block (32) being arranged at the free end of the swing arm, and a front limit block (21) and a rear limit block (22) for limiting the displacement of the slide seat being arranged on the base, characterized in that: A guide bracket (40) is fixed on the base, and the guide bracket is provided with a horizontal guide bar (41), a guide platform (42) and a plunger (43), the horizontal guide bar is located above the guide platform, and the plunger is located at the front end of the horizontal guide bar. A guide block (33) is fixed on the swing arm, and a traction hole (34) is provided on the swing arm, and the guide block can pass through the gap between the horizontal guide bar and the guide platform.

2. The foolproof structure for rotating forward and linearly retreating according to claim 1, characterized in that: A slide rail (11) is provided on the base (10), a slide block (12) is matched on the slide rail, and a slide seat (20) is installed on the slide block.

3. The foolproof structure for rotating forward and linearly retreating according to claim 1, characterized in that: The front limit block (21) is provided with a front limit block magnet, the rear limit block (22) is provided with a rear limit block magnet, the front end of the slide seat (20) is provided with a front magnet, and the rear end of the slide seat is provided with a rear magnet. The front magnet can be attracted to the front limit block magnet, and the rear magnet can be attracted to the rear limit block magnet.

4. The foolproof structure for rotating forward and linearly retreating according to claim 1, characterized in that: The front end of the horizontal guide strip (41) is provided with an arc-shaped ramp (411).

5. The foolproof structure for rotating forward and linearly retreating according to claim 1, characterized in that: The horizontal guide strip (41) is fixed on the side wall of the guide bracket (40), the plunger (43) protrudes from the side wall of the guide bracket, and the end surface of the free end of the guide block (33) is inclined.

6. The foolproof structure for rotating forward and linearly retreating according to claim 1, characterized in that: The guide block (33) is tilted and fixed on the swing arm (30); when the guide block is in a horizontal position, the angle between the swing arm and the horizontal plane is greater than zero degrees.

7. The foolproof structure for rotating forward and linearly retreating according to claim 1, characterized in that: A locking block groove (45) is provided on the guide platform (42), a locking block (44) is hinged in the locking block groove, the locking block is L-shaped, the middle part of the locking block is hinged to the guide bracket (40), one end of the locking block is provided with a counterweight hole (441), the end is located at the bottom and abuts against the bottom surface of the locking block groove, and the other end of the locking block is located at the top and protrudes upward from the guide platform (42).

8. The foolproof structure for rotating forward and linearly retreating as claimed in claim 1, characterized in that: One end of the swing arm (30) hinged to the slide seat (20) is provided with a rearward swing limiting convex portion (35), and the rearward swing limiting convex portion can abut against the slide seat.

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