Steel plate spring stacking device

Abstract

The invention relates to the field of steel plate spring assembling, in particular to a steel plate spring stacking device which comprises a workbench, a jacking air cylinder is fixedly arranged at the bottom of the workbench, a back plate is fixedly arranged on one side of the upper end of the workbench, the output end of the jacking air cylinder is connected with a mounting frame, and cambered surface bearing blocks are fixedly arranged on the two sides of the upper end of the mounting frame. Positioning columns are fixedly arranged at the two ends of the back plate; a pressing cylinder is fixedly arranged at the top end of the back plate; the output end of the pressing cylinder is connected with a U-shaped push head; a pushing cylinder and a detection cylinder are fixedly arranged on the side wall of the back plate, the output end of the pushing cylinder is connected with a U-shaped pushing plate, and the output end of the detection cylinder is connected with a mounting seat; a detection end is fixedly arranged on the mounting seat, and a clamping and bending assembly is arranged on the back plate. By means of the steel plate spring stacking machine, the integrated stacking process of compacting, clamping, nut screwing, U-shaped clamp bending, detecting and discharging of steel plate springs can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of leaf spring assembly, and in particular to a leaf spring stacking device. Background Art

[0002] Leaf spring is the most widely used elastic element in automobile suspension. It is an elastic beam of approximately equal strength composed of several alloy spring leaves of equal width but unequal length.

[0003] At present, when stacking multiple leaf springs, it is necessary to first use a hydraulic press to compact the multiple leaf springs, and then manually tighten the bolts on the center hole of the leaf springs. Two U-shaped clips are pre-installed on one leaf spring. After the leaf springs are stacked, it is necessary to manually hit the U-shaped clips with a hammer to close them to assist in fixing the multiple leaf springs. During the entire stacking process, there are many manual operations, which is time-consuming and labor-intensive, and greatly affects the stacking efficiency of the leaf springs. Summary of the invention

[0004] The purpose of the present invention is to provide a leaf spring stacking device to solve the above technical problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A leaf spring stacking device comprises a workbench, wherein a lifting cylinder is fixedly arranged at the bottom of the workbench, a back plate is fixedly arranged on one side of the upper end of the workbench, the output end of the lifting cylinder is connected to a mounting frame, and arc-surface supporting blocks are fixedly arranged on both sides of the upper end of the mounting frame, a nut tightening assembly is arranged in the mounting frame, positioning columns are fixedly arranged at both ends of the back plate, the lowest leaf spring is pressed against the arc-surface supporting block and its two ends are slidably mounted on the positioning columns by rolling ears, a pressing cylinder is fixedly arranged on the top of the back plate, the output end of the pressing cylinder is connected to a U-shaped pushing head, a pushing cylinder and a detection cylinder are fixedly arranged on the side wall of the back plate, the output end of the pushing cylinder is connected to a U-shaped pushing plate, the output end of the detection cylinder is connected to a mounting seat, a detection end is fixedly arranged on the mounting seat, and a clamping bending assembly is arranged on the back plate.

[0006] The clamping and bending assembly includes a lifting cylinder, a group of symmetrically arranged toothed plates and a group of symmetrically arranged stands, the lifting cylinder is fixedly arranged on the back plate, the output end of the lifting cylinder is connected to the lifting plate, the two ends of the bottom of the lifting plate are fixedly connected to the top of the toothed plate, a bidirectional screw is rotatably installed in each of the stands, a pair of movable seats are threadedly penetrated at both ends of the bidirectional screw, a clamping and bending plate is extended from the upper end of each of the movable seats, the clamping and bending plates are symmetrically arranged on the front and rear sides of the leaf spring, one end of the stand is rotatably matched with the back plate through a rotating shaft, a steering gear is fixedly sleeved on the rotating shaft, and the steering gear is meshed with the corresponding toothed plate.

[0007] As a further solution of the present invention: a baffle is fixedly provided at the bottom end of the tooth groove plate, a sliding rod is slidably provided on the baffle, a fixing seat is fixedly connected to the bottom end of the sliding rod, one side of the fixing seat is fixedly installed on the back plate, and a reset spring is provided between the baffle and the fixing seat.

[0008] As a further solution of the present invention: a driving motor is fixedly arranged on one side of the platform, the output end of the driving motor is connected to the bidirectional screw, a polished rod is fixedly arranged inside the platform, and the bottom of the movable seat is slidably penetrated and installed on the polished rod.

[0009] As a further solution of the present invention: the nut tightening assembly includes an outer sleeve, a sleeve and a center pin which are coaxially arranged in sequence from the outside to the inside, the outer sleeve is fixedly arranged on the mounting frame, an inner sleeve is coaxially arranged at the center of the outer sleeve, an annular cavity is formed between the inner wall of the outer sleeve and the outer wall of the inner sleeve, a ventilation cavity connected to the inner cavity of the inner sleeve is arranged at the bottom of the outer sleeve, the bottom of the annular cavity is connected to the ventilation cavity through a ventilation hole, an air pump is fixedly arranged in the mounting frame, and the air pump is connected to the top of the annular cavity through an air pipe.

[0010] As a further solution of the present invention: the sleeve is axially slidably sleeved on the outer wall of the inner sleeve, a first piston is circumferentially arranged at the bottom of the sleeve, the first piston is slidably installed in the annular cavity, the top end of the sleeve passes through the mounting frame, and a nut groove is arranged at the upper end of the sleeve.

[0011] As a further solution of the present invention: the depth of the nut groove is one third of the thickness of the locking nut.

[0012] As a further solution of the present invention: a second piston is fixedly provided at the bottom end of the center pin rod, the second piston is slidably installed in the inner cavity of the inner sleeve, and the top end of the center pin rod extends upward from the sleeve.

[0013] As a further solution of the present invention: a bracket is fixedly provided on one side of the mounting frame, a driving sleeve is rotatably installed on the bracket, the sleeve is slidably penetrated and installed in the driving sleeve, a matching gear is fixedly provided on the outer side of the sleeve, a rotating motor is fixedly provided on the bottom of the bracket, a rotating gear is connected to the output end of the rotating motor, and the matching gear and the rotating gear are connected by a transmission toothed belt.

[0014] As a further solution of the present invention: a limiting groove is longitudinally arranged on the outer wall of the sleeve, and a limiting strip is longitudinally arranged on the inner wall of the driving sleeve, and the limiting strip is adapted to be slidably installed in the limiting groove.

[0015] As a further solution of the present invention: guide rods parallel to the positioning columns are fixedly provided at both ends of the back plate, and both ends of the U-shaped push plate are slidably penetrated and installed on the guide rods.

[0016] Beneficial effects of the present invention: (1) When stacking leaf springs, control the lifting cylinder to lift the mounting frame upward so that the arc surface support block rises to a suitable height, so that the lowest leaf spring can rest against the arc surface support block. When multiple leaf springs are compacted, the arc surface support block can provide stable support. During the compaction process, the clamping and bending components are used to clamp the two sides of the steel plate to achieve deviation correction and positioning. After the leaf spring is compacted, the locking bolts are tightened in the center of the leaf spring using the nut assembly, and then the U-shaped clips reserved on both sides are bent again using the clamping and bending components to shape the leaf spring. After the leaf spring is shaped, the lifting cylinder drives the mounting frame to descend to provide sufficient detection space for the detection end. The detection cylinder drives the mounting seat to extend until the detection end moves to the bottom of the leaf spring. The downward pressure cylinder begins to push the shaped leaf spring, and the detection end is used to detect whether the vibration reduction performance of the leaf spring meets the standard. After the inspection is completed, the push cylinder starts to push the U-shaped push plate, and the U-shaped push plate will push the leaf spring to slide along the positioning column until it disengages, thereby realizing the integrated stacking process of compacting, clamping, tightening nuts, bending the U-shaped clip, inspecting and unloading the leaf spring.

[0017] (2) By setting the clamping and bending assembly, when the leaf springs are stacked, the clamping and bending plates are in a vertical state. Since the clamping and bending plates are symmetrically arranged on the front and rear sides of the leaf springs, when the bidirectional screw is driven to rotate, the relative clamping and bending plates will approach each other until they are pressed against the front and rear sides of the leaf springs, thereby clamping and positioning the leaf springs to prevent the leaf springs from deflecting during the stacking and compacting process. When the leaf springs are compacted, the toothed plates at both ends are driven upward by the lifting cylinder, and the toothed plates will drive the steering gear to rotate, and the whole frame is driven to rotate through the rotating shaft until the clamping and bending plates rotate to form an intersection with the two ends of the reserved U-shaped clamps. At this time, the clamping and bending plates on both sides are controlled by the bidirectional screws to move closer to each other, and the clamping and bending plates will apply pressure to the two ends of the U-shaped clamps until they are bent into shape. By utilizing the rotation process of the clamping and bending plates, it is possible to flexibly switch between realizing the clamping function and realizing the bending function according to different processing stages, which is highly practical.

[0018] (3) By setting up a nut tightening assembly, the sleeve forms a piston structure with the annular cavity through the first piston, and the center pin forms a piston structure with the inner sleeve cavity through the second piston. At the same time, the lower part of the annular cavity is connected to the inner sleeve through the vent hole and the vent cavity. When stacking, the air pump pumps air to the top of the annular cavity through the air pipe. At this time, the air pressure will push the sleeve downward, and the center pin will be pushed upward, so that multiple leaf springs can be stacked and positioned along the center pin. When tightening the nut, the air pump draws air from the top of the annular cavity through the air pipe. At this time, the sleeve will move upward so that the nut in the nut groove is lifted into place, and the center pin will retreat from the leaf spring downward into the sleeve, so as to facilitate the insertion of the fixing bolt on the leaf spring. By utilizing the air pressure change in the annular cavity, the sleeve and the center pin can always maintain the reverse lifting process, thereby ensuring the orderly progress of the leaf spring stacking and positioning process and the nut tightening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the back structure of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the U-shaped push plate in the present invention.

[0023] Figure 4 It is a structural schematic diagram of the clamping and bending assembly in the present invention.

[0024] Figure 5 It is a schematic diagram of the state when the clamping bending plate is clamped in the present invention.

[0025] Figure 6 It is a schematic diagram of the state of the clamped bending plate when bending in the present invention.

[0026] Figure 7 It is a structural schematic diagram of the mounting frame in the present invention.

[0027] Figure 8 It is a structural schematic diagram of the nut tightening assembly in the present invention.

[0028] Fig. 9 It is a structural schematic diagram of the sleeve and the center pin in the present invention.

[0029] Fig.10 It is a schematic diagram of the cooperation between the drive sleeve and the sleeve in the present invention.

[0030] Fig.11 It is a schematic diagram of the state of the sleeve when the nut is tightened in the present invention.

[0031] Fig.12 It is a structural schematic diagram of the driving sleeve in the present invention.

[0032] In the figure: 1, workbench; 101, back plate; 102, positioning column; 103, guide rod; 2, lifting cylinder; 3, mounting frame; 301, arc surface support block; 302, air pump; 303, air pipe; 304, bracket; 4, nut tightening assembly; 410, outer sleeve; 411, inner sleeve; 412, annular cavity; 413, ventilation cavity; 414, ventilation hole; 420, sleeve; 421, first piston; 422, nut groove; 423, limit groove; 430, center pin; 431, second piston; 440, drive sleeve; 441, matching gear; 442, limit strip; 450, rotating motor; 451. Rotating gear; 452. Transmission toothed belt; 5. Pressing cylinder; 501. U-shaped pushing head; 6. Pushing cylinder; 601. U-shaped pushing plate; 7. Detecting cylinder; 701. Mounting seat; 702. Detecting end; 8. Clamping and bending assembly; 810. Lifting cylinder; 811. Lifting plate; 820. Toothed plate; 821. Baffle; 822. Sliding rod; 823. Fixed seat; 824. Resetting spring; 830. Stand; 831. Driving motor; 832. Bidirectional screw; 833. Moving seat; 834. Clamping and bending plate; 835. Light rod; 836. Rotating shaft; 840. Steering gear. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the present invention is a leaf spring stacking device, comprising a workbench 1, a lifting cylinder 2 is fixedly arranged at the bottom of the workbench 1, a back plate 101 is fixedly arranged on one side of the upper end of the workbench 1, a mounting frame 3 is connected to the output end of the lifting cylinder 2, arc surface support blocks 301 are fixedly arranged on both sides of the upper end of the mounting frame 3, a nut tightening assembly 4 is arranged in the mounting frame 3, positioning columns 102 are fixedly arranged at both ends of the back plate 101, the lowest leaf spring is pressed against the arc surface support block 301 and its two ends are fixedly arranged on the upper end of the mounting frame 3. The end is slidably installed on the positioning column 102 through a rolled ear, a downward pressure cylinder 5 is fixedly arranged on the top of the back plate 101, and the output end of the downward pressure cylinder 5 is connected to a U-shaped pushing head 501, a pushing cylinder 6 and a detection cylinder 7 are fixedly arranged on the side wall of the back plate 101, the output end of the pushing cylinder 6 is connected to a U-shaped pushing plate 601, and the output end of the detection cylinder 7 is connected to a mounting seat 701, a detection terminal 702 is fixedly arranged on the mounting seat 701, and a clamping bending component 8 is arranged on the back plate 101.

[0035] Specifically, when stacking leaf springs, the lifting cylinder 2 is controlled to lift the mounting frame 3 upward, so that the arc surface support block 301 rises to a suitable height, so that the lowest leaf spring can rest against the arc surface support block 301. When compacting multiple leaf springs, the arc surface support block 301 can provide a stable support to prevent the leaf springs from deforming. During the compaction process of multiple leaf springs, the clamping and bending assembly 8 is used to clamp both sides of the steel plate to achieve deviation correction and positioning to prevent the leaf springs from deflecting. After the leaf springs are compacted, the locking bolt is tightened in the center of the leaf spring using the nut tightening assembly 4 to fix it, and then the U-shaped clips reserved on both sides are bent again using the clamping and bending assembly 8 to finalize the leaf spring. After the leaf spring is finalized, the lifting cylinder 2 drives the mounting frame 3 to descend, providing sufficient testing space for the detection end 702. The detection cylinder 7 drives the mounting seat 701 to extend until the detection end 702 moves to the bottom of the leaf spring. The pressing cylinder 5 starts to push the finalized leaf spring, and uses the detection end 702 to detect whether the vibration reduction performance of the leaf spring meets the standard. After the detection is completed, the pushing cylinder 6 starts to push the U-shaped pushing plate 601, which pushes the leaf spring to slide along the positioning column 102 until it is detached, thereby realizing the integrated stacking process of compacting, clamping, tightening nuts, bending the U-shaped clip, testing and unloading the leaf spring.

[0036] like Figure 4 , Figure 5 and Figure 6As shown, the clamping and bending assembly 8 includes a lifting cylinder 810, a group of symmetrically arranged toothed plates 820 and a group of symmetrically arranged stands 830. The lifting cylinder 810 is fixedly arranged on the back plate 101. The output end of the lifting cylinder 810 is connected to the lifting plate 811. The two ends of the bottom of the lifting plate 811 are fixedly connected to the top of the toothed plate 820. A bidirectional screw 832 is rotatably installed in each stand 830. A pair of movable seats 833 are threadedly penetrated at both ends of the bidirectional screw 832. A clamping and bending plate 834 is extended from the upper end of each movable seat 833. The clamping and bending plates 834 are symmetrically arranged on the front and rear sides of the leaf spring. One end of the stand 830 is rotatably matched with the back plate 101 through a rotating shaft 836. A steering gear 840 is fixedly sleeved on the rotating shaft 836, and the steering gear 840 is meshed with the corresponding toothed plate 820.

[0037] Specifically, by providing the clamping and bending assembly 8, when the leaf springs are stacked, the clamping and bending plate 834 is in a vertical state (such as Figure 5 As shown), since the clamping and bending plates 834 are symmetrically arranged on the front and rear sides of the leaf spring, when the bidirectional screw 832 is driven to rotate, the relative clamping and bending plates 834 will approach each other until they are pressed against the front and rear sides of the leaf spring, thereby clamping and positioning the leaf spring to prevent the leaf spring from shifting during the stacking and compacting process. After the leaf spring is compacted, the toothed plates 820 at both ends are driven upward by the lifting cylinder 810, and the toothed plates 820 will drive the steering gear 840 to rotate, and drive the stand 830 to rotate as a whole through the rotating shaft 836, until the clamping and bending plates 834 rotate to form an intersection with the two ends of the reserved U-shaped clamp (as shown in FIG. Figure 6 As shown in FIG. 1 ), at this time, the two-way screw 832 is used again to control the clamping and bending plates 834 on both sides to move closer to each other, and the clamping and bending plates 834 will apply pressure to both ends of the U-shaped clamp until the U-shaped clamp is bent. By utilizing the rotation process of the clamping and bending plates 834, it is possible to flexibly switch between realizing the clamping function and realizing the bending function according to different processing stages, which is highly practical.

[0038] like Figure 4 As shown, a baffle 821 is fixedly provided at the bottom end of the toothed plate 820, a slide rod 822 is slidably provided on the baffle 821, a fixing seat 823 is fixedly connected to the bottom end of the slide rod 822, one side of the fixing seat 823 is fixedly installed on the back plate 101, and a return spring 824 is provided between the baffle 821 and the fixing seat 823.

[0039] Specifically, when the toothed plates 820 at both ends are driven to move up and down by the lifting cylinder 810, the toothed plates 820 will always slide along the sliding rod 822, which effectively improves the stability of the toothed plates 820 during the lifting and displacement.

[0040] like Figure 4As shown, a driving motor 831 is fixedly installed on one side of the stand 830 , and the output end of the driving motor 831 is connected to a bidirectional screw 832 . A light rod 835 is fixedly installed inside the stand 830 , and the bottom of the moving seat 833 is slidably penetrated and installed on the light rod 835 .

[0041] Specifically, when the driving motor 831 is started, it will drive the bidirectional screw 832 to rotate, and the bidirectional screw 832 will drive the moving seats 833 at both ends to move towards each other equidistantly. During this process, the bottom end of the moving seat 833 will always slide along the light rod 835, so that the displacement process of the moving seat 833 is reliable and stable.

[0042] like Figure 7 , Figure 8 and Fig. 9 As shown, the nut tightening assembly 4 includes an outer sleeve 410, a sleeve 420 and a center pin 430 which are coaxially arranged from the outside to the inside. The outer sleeve 410 is fixedly arranged on the mounting frame 3. An inner sleeve 411 is coaxially arranged in the center of the outer sleeve 410. An annular cavity 412 is formed between the inner wall of the outer sleeve 410 and the outer wall of the inner sleeve 411. A ventilation cavity 413 connected to the inner cavity of the inner sleeve 411 is arranged at the bottom of the outer sleeve 410. The bottom of the annular cavity 412 is connected to the ventilation cavity 413 through a ventilation hole 414. An air pump 302 is fixedly arranged in the mounting frame 3. The air pump 302 is connected to the top of the annular cavity 412 through an air pipe 303.

[0043] Furthermore, the sleeve 420 is axially slidably sleeved on the outer wall of the inner sleeve 411, a first piston 421 is circumferentially arranged at the bottom of the sleeve 420, the first piston 421 is slidably installed in the annular cavity 412, the top end of the sleeve 420 passes through the mounting frame 3, and a nut groove 422 is arranged at the upper end of the sleeve 420.

[0044] Furthermore, a second piston 431 is fixedly provided at the bottom end of the center pin 430 , and the second piston 431 is slidably installed in the inner cavity of the inner sleeve 411 , and the top end of the center pin 430 extends upward from the sleeve 420 .

[0045] Specifically, by setting the nut tightening assembly 4, the sleeve 420 forms a piston structure with the annular cavity 412 through the first piston 421, and the center pin 430 forms a piston structure with the inner sleeve 411 cavity through the second piston 431, and the lower part of the annular cavity 412 is connected to the inner sleeve 411 through the vent hole 414 and the vent cavity 413. When stacking, the air pump 302 pumps air to the top of the annular cavity 412 through the air pipe 303, and the air pressure will push the sleeve 420 to move downward, and the center pin 430 will be pushed upward, so as to facilitate the stacking and positioning of multiple leaf springs along the center pin 430. When tightening the nut, the air pump 302 draws air from the top of the annular cavity 412 through the air pipe 303, and the sleeve 420 will move upward so that the nut in the nut groove 422 is lifted into place, and the center pin 430 will retreat downward from the leaf spring into the sleeve 420, so as to facilitate the insertion of the fixing bolt on the leaf spring. By utilizing the air pressure change in the annular cavity 412 , the sleeve 420 and the center pin 430 can always maintain the lifting process in the opposite direction, thereby ensuring the orderly progress of the leaf spring stacking and positioning process and the nut tightening process.

[0046] In this embodiment, the depth of the nut groove 422 is one third of the thickness of the locking nut.

[0047] Specifically, after the leaf spring is compacted, the center pin 430 is retracted, and the locking bolt is manually inserted into the center hole of the leaf spring. At the same time, the sleeve 420 lifts the nut upward until it matches the bottom of the locking bolt, and then the sleeve 420 starts to rotate, driving the nut to rotate along the locking bolt thread until the locking nut is tightly against the bottom of the lowest leaf spring. Therefore, when the locking nut is placed in the nut groove 422, the locking nut must protrude from the nut groove 422, thereby providing sufficient space for the locking nut to abut against the bottom of the leaf spring, which is conducive to the tightening process.

[0048] like Fig.10 , Fig.11 and Fig.12 As shown, a bracket 304 is fixedly provided on one side of the mounting frame 3, a driving sleeve 440 is rotatably installed on the bracket 304, a sleeve 420 is slidably installed in the driving sleeve 440, a matching gear 441 is fixedly provided on the outer side of the sleeve 420, a rotating motor 450 is fixedly provided on the bottom of the bracket 304, a rotating gear 451 is connected to the output end of the rotating motor 450, and the matching gear 441 and the rotating gear 451 are connected by a transmission toothed belt 452.

[0049] Furthermore, a limiting groove 423 is longitudinally arranged on the outer wall of the sleeve 420 , and a limiting strip 442 is longitudinally arranged on the inner wall of the driving sleeve 440 . The limiting strip 442 is adapted to be slidably installed in the limiting groove 423 .

[0050] Specifically, when the rotating motor 450 is started, it will drive the rotating gear 451 to rotate, and the rotating gear 451 will drive the matching gear 441 to rotate through the transmission toothed belt 452, so that the driving sleeve 440 rotates in the bracket 304, and the driving sleeve 440 will drive the sleeve 420 to rotate by the limiting cooperation between the limiting strip 442 and the limiting groove 423, so that the nut is tightened. In this embodiment, the limiting groove 423 has a certain longitudinal length, so that the sleeve 420 will not affect the up and down sliding process of the sleeve 420 in the driving sleeve 440 while the driving sleeve 440 is rotated and tightened.

[0051] like Figure 3 As shown, guide rods 103 parallel to the positioning columns 102 are fixedly arranged at both ends of the back plate 101, and both ends of the U-shaped push plate 601 are slidably installed on the guide rods 103. During the pushing process, the U-shaped push plate 601 always slides along the guide rods 103, which improves the stability of the pushing process.

[0052] The working principle of the present invention is as follows: Figure 1-Figure 12As shown, when stacking leaf springs, the lifting cylinder 2 is controlled to lift the mounting frame 3 upwards, so that the arc surface support block 301 rises to a suitable height, so that the lowest leaf spring can be against the arc surface support block 301, and at the same time, the air pump 302 pumps air to the top of the annular cavity 412 through the air pipe 303. At this time, the air pressure will push the sleeve 420 to move downward, and the center pin 430 will be pushed upward, and then the multiple leaf springs will be stacked and positioned along the center pin 430. During the stacking process, the clamping bending plate 834 is in a vertical state. Since the clamping bending plate 834 is symmetrically arranged on the front and rear sides of the leaf spring, when the bidirectional screw 832 is driven to rotate, the relative clamping bending plates 834 will approach each other until they are pressed against the front and rear sides of the leaf spring, thereby clamping and positioning the leaf spring to prevent the leaf spring from shifting during the stacking and compacting process. After stacking is completed, the U-shaped pusher 501 is driven by the downward pressure cylinder 5 to squeeze the multiple leaf springs, so that the spacing between the leaf springs is reduced to achieve compaction. After the leaf springs are compacted, the air pump 302 will draw air from the top of the annular cavity 412 through the air pipe 303, and the center pin 430 will be withdrawn from the leaf spring to the sleeve 420, and then the locking bolt is manually inserted into the center hole of the leaf spring. At the same time, the sleeve 420 lifts the nut upward until it matches the bottom of the locking bolt. The rotating motor 450 is started, driving the rotating gear 451 to rotate, and the rotating gear 451 will drive the matching gear 441 to rotate through the transmission belt 452, and the movable sleeve will drive the sleeve 420 to rotate, thereby driving the nut to be tightened. The toothed plates 820 at both ends are driven upward by the lifting cylinder 810, and the toothed plates 820 will drive the steering gear 840 to rotate, and the rotating shaft 836 will drive the stand 830 to rotate as a whole, until the clamping bending plate 834 rotates to form an intersection with the two ends of the reserved U-shaped clamp. At this time, the clamping bending plates 834 on both sides are controlled to move closer to each other by the bidirectional screw 832 again, and the clamping bending plates 834 will press the two ends of the U-shaped clamp until the bending is formed, so that the leaf spring is finalized. After the leaf spring is finalized, the lifting cylinder 2 drives the mounting frame 3 to descend, providing enough testing space for the detection terminal 702, and the detection cylinder 7 drives the mounting seat 701 to extend until the detection terminal 702 moves to the bottom of the leaf spring, and the pressing cylinder 5 starts to push the finalized leaf spring, and the detection terminal 702 is used to detect whether the vibration reduction performance of the leaf spring meets the standard. After the detection is completed, the pushing cylinder 6 starts to push the U-shaped pushing plate 601, and the U-shaped pushing plate 601 will push the leaf spring to slide along the positioning column 102 until it is detached, thereby realizing the integrated stacking process of compacting, clamping, tightening nuts, U-shaped clamp bending, testing and unloading the leaf spring.

[0053] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A leaf spring stacking device, comprising a workbench (1), a lifting cylinder (2) fixedly arranged at the bottom of the workbench (1), and a back plate (101) fixedly arranged at one side of the upper end of the workbench (1), characterized in that: The output end of the lifting cylinder (2) is connected to a mounting frame (3), arc-surface support blocks (301) are fixedly provided on both sides of the upper end of the mounting frame (3), a nut tightening assembly (4) is provided in the mounting frame (3), positioning columns (102) are fixedly provided at both ends of the back plate (101), the lowest leaf spring is pressed against the arc-surface support blocks (301) and its two ends are slidably installed on the positioning columns (102) through rolled ears, and a downward pressure cylinder is fixedly provided at the top of the back plate (101). (5), the output end of the downward pressure cylinder (5) is connected to a U-shaped push head (501), a push cylinder (6) and a detection cylinder (7) are fixedly arranged on the side wall of the back plate (101), the output end of the push cylinder (6) is connected to a U-shaped push plate (601), the output end of the detection cylinder (7) is connected to a mounting seat (701), a detection end head (702) is fixedly arranged on the mounting seat (701), and a clamping bending component (8) is arranged on the back plate (101); The clamping and bending assembly (8) comprises a lifting cylinder (810), a group of symmetrically arranged toothed plates (820), and a group of symmetrically arranged stands (830), wherein the lifting cylinder (810) is fixedly arranged on the back plate (101), the output end of the lifting cylinder (810) is connected to a lifting plate (811), the bottom ends of the lifting plate (811) are fixedly connected to the top ends of the toothed plates (820), and each stand (830) is rotatably installed with a bidirectional screw (832), and the bidirectional screw ( A pair of movable seats (833) are threadedly provided at both ends of the spring (832), and a clamping bending plate (834) is extended from the upper end of each movable seat (833). The clamping bending plates (834) are symmetrically arranged on the front and rear sides of the leaf spring. One end of the stand (830) is rotatably matched with the back plate (101) through a rotating shaft (836), and a steering gear (840) is fixedly sleeved on the rotating shaft (836), and the steering gear (840) is meshed with the corresponding tooth groove plate (820).

2. A leaf spring stacking device according to claim 1, characterized in that: A baffle (821) is fixedly provided at the bottom end of the tooth groove plate (820), a slide rod (822) is slidably provided on the baffle (821), a fixing seat (823) is fixedly connected to the bottom end of the slide rod (822), one side of the fixing seat (823) is fixedly mounted on the back plate (101), and a return spring (824) is provided between the baffle (821) and the fixing seat (823).

3. The leaf spring stacking device according to claim 1, characterized in that: A driving motor (831) is fixedly arranged on one side of the platform (830), and an output end of the driving motor (831) is connected to a bidirectional screw rod (832). A polished rod (835) is fixedly arranged inside the platform (830), and a bottom of the movable seat (833) is slidably penetrated and installed on the polished rod (835).

4. The leaf spring stacking device according to claim 1, characterized in that: The nut tightening assembly (4) comprises an outer sleeve (410), a sleeve (420) and a center pin (430) which are coaxially arranged in sequence from the outside to the inside. The outer sleeve (410) is fixedly arranged on the mounting frame (3). An inner sleeve (411) is coaxially arranged in the center of the outer sleeve (410). An annular cavity (412) is formed between the inner wall of the outer sleeve (410) and the outer wall of the inner sleeve (411). A ventilation cavity (413) which is connected to the inner cavity of the inner sleeve (411) is arranged at the bottom of the outer sleeve (410). The bottom of the annular cavity (412) is connected to the ventilation cavity (413) via a ventilation hole (414). An air pump (302) is fixedly arranged in the mounting frame (3). The air pump (302) is connected to the top of the annular cavity (412) via an air pipe (303).

5. A leaf spring stacking device according to claim 4, characterized in that: The sleeve (420) is axially slidably sleeved on the outer wall of the inner sleeve (411); a first piston (421) is circumferentially arranged at the bottom of the sleeve (420); the first piston (421) is slidably mounted in the annular cavity (412); the top end of the sleeve (420) passes through the mounting frame (3); and a nut groove (422) is arranged at the upper end of the sleeve (420).

6. A leaf spring stacking device according to claim 5, characterized in that: The depth of the nut groove (422) is one third of the thickness of the locking nut.

7. The leaf spring stacking device according to claim 5, characterized in that: A second piston (431) is fixedly disposed at the bottom end of the center pin (430), and the second piston (431) is slidably mounted in the inner cavity of the inner sleeve (411). The top end of the center pin (430) protrudes upward from the sleeve (420).

8. The leaf spring stacking device according to claim 7, characterized in that: A bracket (304) is fixedly arranged on one side of the mounting frame (3), a driving sleeve (440) is rotatably mounted on the bracket (304), the sleeve (420) is slidably penetrated and installed in the driving sleeve (440), a matching gear (441) is fixedly arranged on the outside of the sleeve (420), a rotating motor (450) is fixedly arranged on the bottom of the bracket (304), an output end of the rotating motor (450) is connected to a rotating gear (451), and the matching gear (441) and the rotating gear (451) are connected via a transmission toothed belt (452).

9. A leaf spring stacking device according to claim 8, characterized in that: A limiting groove (423) is longitudinally arranged on the outer wall of the sleeve (420), and a limiting strip (442) is longitudinally arranged on the inner wall of the drive sleeve (440), and the limiting strip (442) is adapted to be slidably installed in the limiting groove (423).

10. The leaf spring stacking device according to claim 1, characterized in that: Guide rods (103) parallel to the positioning columns (102) are fixedly provided at both ends of the back plate (101), and both ends of the U-shaped push plate (601) are slidably penetrated and installed on the guide rods (103).

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