A steel leaf spring stacking device

Abstract

This invention relates to the field of leaf spring assembly, and more particularly to a leaf spring stacking device, comprising a worktable, a lifting cylinder fixedly mounted at the bottom of the worktable, a back plate fixedly mounted on one side of the upper part of the worktable, a mounting frame connected to the output end of the lifting cylinder, arc-shaped support blocks fixedly mounted on both sides of the upper end of the mounting frame, a nut tightening assembly disposed within the mounting frame, positioning posts fixedly mounted at both ends of the back plate, a pressing cylinder fixedly mounted at the top of the back plate, a U-shaped pusher connected to the output end of the pressing cylinder, a pushing cylinder and a detection cylinder fixedly mounted on the side wall of the back plate, a U-shaped pushing plate connected to the output end of the pushing cylinder, a mounting base connected to the output end of the detection cylinder, a detection end fixedly mounted on the mounting base, and a clamping and bending assembly disposed on the back plate. This invention enables an integrated stacking process for leaf springs, including compaction, clamping, nut tightening, U-shaped clamp bending, detection, and unloading.

Description

Technical Field

[0001] This invention relates to the field of leaf spring assembly technology, and in particular to a leaf spring stacking device. Background Technology

[0002] Leaf springs are the most widely used elastic element in automotive suspensions. They are an elastic beam of approximately equal strength composed of several alloy spring leaves of equal width but unequal length.

[0003] Currently, when stacking multiple leaf springs, a hydraulic press is first used to compact the springs. Then, bolts are manually tightened into the center holes of the springs. Two U-shaped clips are pre-installed on one of the springs; after stacking, the clips are manually hammered to seal them, further securing the springs. This entire stacking process involves a great deal of manual labor, is time-consuming and labor-intensive, and significantly impacts the efficiency of leaf spring stacking. Summary of the Invention

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

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A plate spring stacking device includes a worktable, a lifting cylinder fixedly mounted at the bottom of the worktable, a back plate fixedly mounted on one side of the upper end of the worktable, a mounting frame connected to the output end of the lifting cylinder, arc-shaped support blocks fixedly mounted on both sides of the upper end of the mounting frame, a nut tightening assembly disposed inside the mounting frame, positioning posts fixedly mounted at both ends of the back plate, the lowest plate spring pressing against the arc-shaped support blocks and its two ends slidably mounted on the positioning posts via lugs, a pressing cylinder fixedly mounted at the top of the back plate, a U-shaped pusher connected to the output end of the pressing cylinder, a pushing cylinder and a detection cylinder fixedly mounted on the side wall of the back plate, a U-shaped pushing plate connected to the output end of the pushing cylinder, a mounting base connected to the output end of the detection cylinder, a detection end fixedly mounted on the mounting base, and a clamping bending assembly disposed on the back plate.

[0007] The clamping and bending assembly includes a lifting cylinder, a set of symmetrically arranged toothed plates, and a set of symmetrically arranged frames. The lifting cylinder is fixedly mounted on the back plate, and the output end of the lifting cylinder is connected to a lifting plate. The bottom ends of the lifting plate are fixedly connected to the top ends of the toothed plates. A bidirectional screw is rotatably installed in each frame. A pair of movable seats are threaded through both ends of the bidirectional screw. A clamping and bending plate extends from the upper end of each movable seat. The clamping and bending plates are symmetrically arranged on the front and rear sides of the leaf spring. One end of the frame is rotatably engaged with the back plate through a rotating shaft. A steering gear is fixedly sleeved on the rotating shaft, and the steering gear meshes with the corresponding toothed plate.

[0008] As a further embodiment of the present invention: a baffle is fixedly provided at the bottom end of the toothed plate, a sliding rod is slidably provided through the baffle, a fixed seat is fixedly connected to the bottom end of the sliding rod, one side of the fixed seat is fixedly installed on the back plate, and a return spring is provided between the baffle and the fixed seat.

[0009] As a further embodiment of the present invention: a drive motor is fixedly installed on one side of the platform, the output end of the drive motor is connected to a bidirectional screw, a light rod is fixedly installed inside the platform, and the bottom of the movable seat is slidably mounted on the light rod.

[0010] As a further embodiment of the present invention: the nut tightening assembly includes an outer sleeve, a sleeve, and a central pin arranged coaxially from the outside to the inside. The outer sleeve is fixedly mounted on a mounting bracket. An inner sleeve is coaxially arranged in 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 venting cavity communicating with the inner cavity of the inner sleeve is provided at the bottom of the outer sleeve. The bottom of the annular cavity is connected to the venting cavity through a vent hole. An air pump is fixedly mounted inside the mounting bracket. The air pump is connected to the top of the annular cavity through an air pipe.

[0011] As a further aspect 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 bracket, and a nut groove is provided at the upper end of the sleeve.

[0012] As a further aspect of the present invention, the depth of the nut groove is one-third of the thickness of the locking nut.

[0013] As a further aspect of the present invention: a second piston is fixedly provided at the bottom end of the central pin, the second piston is slidably installed in the inner cavity of the inner sleeve, and the top end of the central pin extends upward from inside the sleeve.

[0014] As a further embodiment of the present invention: a bracket is fixedly provided on one side of the mounting frame, a drive sleeve is rotatably mounted on the bracket, the sleeve is slidably installed inside the drive sleeve, a mating gear is fixedly provided on the outside of the sleeve, a rotary motor is fixedly provided at the bottom of the bracket, a rotary gear is connected to the output end of the rotary motor, and the mating gear and the rotary gear are connected by a transmission toothed belt.

[0015] As a further embodiment of the present invention: a limiting groove is longitudinally provided on the outer wall of the sleeve, and a limiting strip is longitudinally provided on the inner wall of the drive sleeve, the limiting strip being adapted to slide within the limiting groove.

[0016] As a further embodiment of the present invention: guide rods parallel to the positioning posts are fixedly provided at both ends of the back plate, and the two ends of the U-shaped pusher plate are slidably installed on the guide rods.

[0017] The beneficial effects of this invention are:

[0018] (1) When stacking leaf springs, control the lifting cylinder to raise the mounting frame upwards, so that the arc support block rises to a suitable height, allowing the bottom leaf spring to abut against the arc support block. When pressing multiple leaf springs, the arc support block provides stable support. During the pressing process, the clamping and bending assembly is used to clamp the two sides of the leaf spring to achieve correction and positioning. After the leaf spring is pressed, the locking bolt is tightened in the center of the leaf spring using the nut tightening assembly for fixation. Then, the clamping and bending assembly is used again to bend the U-shaped clamps reserved on both sides to shape the leaf spring. After the leaf spring is shaped, the lifting cylinder drives the mounting frame to descend, providing sufficient testing space for the testing end. The testing cylinder drives the mounting seat to extend until the testing end moves directly under the leaf spring. The pressing cylinder begins to push the shaped leaf spring, and the testing end is used to test whether the vibration damping performance of the leaf spring meets the standard. After the inspection is completed, the pusher cylinder starts to push the U-shaped pusher plate. The U-shaped pusher plate will push the steel leaf spring to slide along the positioning post until it is disengaged, thereby realizing the integrated stacking process of compacting, clamping, tightening nuts, U-shaped clamp bending, inspection and unloading of the steel leaf spring.

[0019] (2) By setting up a clamping and bending assembly, the clamping and bending plates are in a vertical state when stacking leaf springs. 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 move closer to 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 them from shifting during the stacking and compaction process. After the leaf springs are compacted, the toothed plates at both ends are moved upward by the lifting cylinder. The toothed plates will drive the steering gear to rotate and drive the entire frame to rotate through the rotating shaft until the clamping and bending plates rotate to intersect with the reserved U-shaped clamps at both ends. At this time, the clamping and bending plates on both sides are again controlled to move closer to each other by the bidirectional screw. The clamping and bending plates will apply pressure to the ends of the U-shaped clamps until they are bent into shape. By utilizing the rotation process of the clamping and bending plates, the clamping function and the bending function can be flexibly switched according to different processing stages, which is highly practical.

[0020] (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 a vent hole and a vent chamber. When stacking, the air pump pumps air to the upper part of the annular cavity through the air pipe. At this time, the air pressure will push the sleeve downward, and the center pin will push upward, so as to facilitate the stacking and positioning of multiple leaf springs along the center pin. When tightening the nut, the air pump draws air from the upper part 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 retract downward from the leaf spring into the sleeve, so as to facilitate the insertion of the fixing bolt on the leaf spring. The air pressure change in the annular cavity can make the sleeve and the center pin always maintain the opposite lifting process, thus ensuring the orderly progress of the leaf spring stacking and positioning process and the nut tightening process. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the rear structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the U-shaped pusher plate in this invention.

[0025] Figure 4 This is a schematic diagram of the clamping and bending assembly in this invention.

[0026] Figure 5 This is a schematic diagram of the state when the clamping bending plate is clamped in this invention.

[0027] Figure 6 This is a schematic diagram of the state of the clamped bending plate during bending in this invention.

[0028] Figure 7 This is a schematic diagram of the mounting bracket in this invention.

[0029] Figure 8 This is a schematic diagram of the nut tightening assembly in this invention.

[0030] Figure 9 This is a schematic diagram of the sleeve and the central pin in this invention.

[0031] Figure 10 This is a schematic diagram of the engagement between the drive sleeve and the sleeve in this invention.

[0032] Figure 11 This is a schematic diagram of the state of the sleeve when tightening the nut in this invention.

[0033] Figure 12 This is a schematic diagram of the drive sleeve in this invention.

[0034] In the diagram: 1. Workbench; 101. Backplate; 102. Positioning pin; 103. Guide rod; 2. Lifting cylinder; 3. Mounting bracket; 301. Arc-shaped support block; 302. Air pump; 303. Air pipe; 304. Bracket; 4. Nut tightening assembly; 410. Outer sleeve; 411. Inner sleeve; 412. Annular cavity; 413. Vent chamber; 414. Vent hole; 420. Sleeve; 421. First piston; 422. Nut groove; 423. Limiting groove; 430. Center pin; 431. Second piston; 440. Drive sleeve; 441. Matching gear; 442. Limiting strip; 450. Rotary motor; 451. Rotary gear; 452. Transmission toothed belt; 5. Pressing cylinder; 501. U-shaped pusher head; 6. Pushing cylinder; 601. U-shaped pusher plate; 7. Detection cylinder; 701. Mounting seat; 702. Detection end; 8. Clamping bending assembly; 810. Lifting cylinder; 811. Lifting plate; 820. Toothed plate; 821. Baffle; 822. Slide rod; 823. Fixed seat; 824. Return spring; 830. Stand; 831. Drive motor; 832. Bidirectional screw; 833. Moving seat; 834. Clamping bending plate; 835. Smooth rod; 836. Rotating shaft; 840. Steering gear. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Please see Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, this invention is a steel leaf spring stacking device, including a workbench 1, a lifting cylinder 2 fixedly installed at the bottom of the workbench 1, a back plate 101 fixedly installed on one side of the upper end of the workbench 1, a mounting frame 3 connected to the output end of the lifting cylinder 2, arc-shaped support blocks 301 fixedly installed on both sides of the upper end of the mounting frame 3, a nut tightening assembly 4 installed inside the mounting frame 3, positioning posts 102 fixedly installed at both ends of the back plate 101, and the lowest steel leaf spring pressing against the arc-shaped support blocks 301. The end is slidably mounted on the positioning post 102 via the rolled ear. A pressing cylinder 5 is fixedly installed at the top of the back plate 101. The output end of the pressing cylinder 5 is connected to a U-shaped push head 501. A pushing cylinder 6 and a detection cylinder 7 are fixedly installed 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. The output end of the detection cylinder 7 is connected to a mounting base 701. A detection end head 702 is fixedly installed on the mounting base 701. A clamping and bending assembly 8 is installed on the back plate 101.

[0037] Specifically, during the stacking of leaf springs, the lifting cylinder 2 is controlled to raise the mounting frame 3 upwards, causing the curved support block 301 to rise to a suitable height. This allows the lowest leaf spring to rest against the curved support block 301. When multiple leaf springs are compressed, the curved support block 301 provides stable support, preventing deformation. During the compression process, the clamping and bending assembly 8 clamps both sides of the leaf springs to correct their position and prevent misalignment. After compression, the locking bolts are tightened at the center of the leaf spring using the nut tightening assembly 4 for fixation. Then, the clamping and bending assembly 8 is used again to bend the U-shaped clamps on both sides, thus shaping the leaf springs. After the leaf spring is shaped, the lifting cylinder 2 drives the mounting bracket 3 to descend, providing sufficient inspection space for the inspection end 702. The inspection cylinder 7 drives the mounting base 701 to extend until the inspection end 702 moves directly below the leaf spring. The pressing cylinder 5 then begins to press the shaped leaf spring, using the inspection end 702 to check whether the vibration damping performance of the leaf spring meets the standard. After the inspection is completed, the pushing cylinder 6 begins to push the U-shaped pushing plate 601. The U-shaped pushing plate 601 pushes the leaf spring along the positioning post 102 until it disengages, thus realizing an integrated stacking process of compacting, clamping, tightening nuts, U-clamping bending, inspection, and unloading of the leaf spring.

[0038] like Figure 4 , Figure 5 and Figure 6As shown, the clamping and bending assembly 8 includes a lifting cylinder 810, a set of symmetrically arranged toothed plates 820, and a set of symmetrically arranged platforms 830. The lifting cylinder 810 is fixedly mounted 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. Each platform 830 has a bidirectional screw 832 rotatably mounted inside. A pair of movable seats 833 are threaded through both ends of the bidirectional screw 832. Each movable seat 833 has a clamping and bending plate 834 extending from its upper end. The clamping and bending plates 834 are symmetrically arranged on the front and rear sides of the leaf spring. One end of the platform 830 is rotatably engaged with the back plate 101 through a rotating shaft 836. A steering gear 840 is fixedly sleeved on the rotating shaft 836. The steering gear 840 meshes with the corresponding toothed plate 820.

[0039] Specifically, by setting the clamping bending assembly 8, the clamping bending plate 834 is in a vertical state when stacking leaf springs (e.g., Figure 5 As shown, since the clamping 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 opposing clamping bending plates 834 will move closer to 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 it from shifting during the stacking and compaction process. After the leaf spring is compacted, the lifting cylinder 810 drives the toothed plates 820 at both ends to move upward. The toothed plates 820 will drive the steering gear 840 to rotate, and drive the entire frame 830 to rotate through the rotating shaft 836, until the clamping bending plates 834 rotate to form an intersection with the two ends of the reserved U-shaped clamp (as shown). Figure 6 As shown in the diagram, the bidirectional screw 832 controls the clamping and bending plates 834 on both sides to move closer to each other, and the clamping and bending plates 834 apply pressure to both ends of the U-shaped clamp until it is bent into shape. By utilizing the rotation process of the clamping and bending plates 834, the clamping and bending functions can be flexibly switched according to different processing stages, which is highly practical.

[0040] like Figure 4 As shown, a baffle 821 is fixedly installed at the bottom of the toothed plate 820, and a slide rod 822 is slidably installed through the baffle 821. A fixed seat 823 is fixedly connected to the bottom of the slide rod 822. One side of the fixed seat 823 is fixedly installed on the back plate 101, and a return spring 824 is provided between the baffle 821 and the fixed seat 823.

[0041] Specifically, when the toothed plates 820 at both ends are moved up and down by the lifting cylinder 810, the toothed plates 820 will always slide along the slide rod 822, which effectively improves the stability of the toothed plates 820 during the lifting and lowering displacement.

[0042] like Figure 4As shown, a drive motor 831 is fixedly installed on one side of the stand 830. The output end of the drive motor 831 is connected to a bidirectional screw 832. A guide rod 835 is fixedly installed inside the stand 830. The bottom of the movable seat 833 is slidably installed on the guide rod 835.

[0043] Specifically, when the drive motor 831 starts, it will drive the bidirectional screw 832 to rotate. The bidirectional screw 832 will drive the moving seats 833 at both ends to move towards each other at equal distances. During this process, the bottom end of the moving seat 833 will always slide along the smooth rod 835, so that the displacement process of the moving seat 833 is reliable and stable.

[0044] like Figure 7 , Figure 8 and Figure 9 As shown, the nut tightening assembly 4 includes an outer sleeve 410, a sleeve 420, and a center pin 430 arranged coaxially from the outside to the inside. The outer sleeve 410 is fixedly mounted on the mounting bracket 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 venting cavity 413 communicating with the inner cavity of the inner sleeve 411 is provided at the bottom of the outer sleeve 410. The bottom of the annular cavity 412 is connected to the venting cavity 413 through a vent hole 414. An air pump 302 is fixedly mounted inside the mounting bracket 3. The air pump 302 is connected to the top of the annular cavity 412 through an air pipe 303.

[0045] Furthermore, the sleeve 420 is axially slidably sleeved on the outer wall of the inner sleeve 411, and a first piston 421 is circumferentially provided at the bottom of the sleeve 420. The first piston 421 is slidably installed in the annular cavity 412, and the top end of the sleeve 420 passes through the mounting bracket 3. A nut groove 422 is provided at the upper end of the sleeve 420.

[0046] Furthermore, a second piston 431 is fixedly installed at the bottom end of the center pin 430. 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 inside the sleeve 420.

[0047] Specifically, by setting up 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 cavity of the inner sleeve 411 through the second piston 431. Simultaneously, the lower part of the annular cavity 412 is connected to the inner sleeve 411 through a vent hole 414 and a vent chamber 413. During stacking, the air pump 302 pumps air upwards from the annular cavity 412 through the air pipe 303. This air pressure pushes the sleeve 420 downwards, while the center pin 430 pushes upwards, facilitating the stacking and positioning of multiple leaf springs along the center pin 430. When tightening the nut, the air pump 302 draws air from above the annular cavity 412 through the air pipe 303. This causes the sleeve 420 to move upwards, lifting the nut in the nut groove 422 into place, while the center pin 430 retracts downwards from the leaf spring into the sleeve 420, facilitating the insertion of a fixing bolt into the leaf spring. The air pressure change in the annular cavity 412 allows the sleeve 420 and the center pin 430 to maintain a constant upward and downward movement in opposite directions, thus ensuring the orderly progress of the steel leaf spring stacking and positioning process and the nut tightening process.

[0048] In this embodiment, the depth of the nut groove 422 is one-third of the thickness of the locking nut.

[0049] Specifically, after the leaf spring is compressed, the center pin 430 retracts, and a locking bolt is manually inserted into the center hole of the leaf spring. Simultaneously, the sleeve 420 pushes the nut upwards until it engages with the bottom of the locking bolt. Then, the sleeve 420 rotates, causing the nut to rotate along the threads of the locking bolt until the locking nut is firmly against the bottom of the lowest leaf spring. Therefore, when the locking nut is placed in the nut groove 422, it must protrude from the groove to provide sufficient space for the locking nut to abut against the bottom of the leaf spring, facilitating the tightening process.

[0050] like Figure 10 , Figure 11 and Figure 12 As shown, a bracket 304 is fixedly installed on one side of the mounting bracket 3. A drive sleeve 440 is rotatably installed on the bracket 304. A sleeve 420 is slidably installed inside the drive sleeve 440. A mating gear 441 is fixedly installed on the outside of the sleeve 420. A rotary motor 450 is fixedly installed at the bottom of the bracket 304. A rotary gear 451 is connected to the output end of the rotary motor 450. The mating gear 441 and the rotary gear 451 are connected by a transmission belt 452.

[0051] Furthermore, a limiting groove 423 is longitudinally provided on the outer wall of the sleeve 420, and a limiting strip 442 is longitudinally provided on the inner wall of the drive sleeve 440. The limiting strip 442 is adapted to slide within the limiting groove 423.

[0052] Specifically, when the rotary motor 450 starts, it drives the rotary gear 451 to rotate. The rotary gear 451 then drives the mating gear 441 to rotate via the transmission belt 452, causing the drive sleeve 440 to rotate within the bracket 304. Utilizing the limiting engagement between the limiting strip 442 and the limiting groove 423, the drive sleeve 440 drives the sleeve 420 to rotate, thereby tightening the nut. In this embodiment, the limiting groove 423 has a certain longitudinal length, which ensures that while the sleeve 420 rotates and tightens with the drive sleeve 440, it does not affect the up-and-down sliding process of the sleeve 420 within the drive sleeve 440.

[0053] like Figure 3 As shown, guide rods 103 parallel to the positioning posts 102 are fixedly installed at both ends of the back plate 101, and the two ends of the U-shaped pusher plate 601 are slidably installed on the guide rods 103. During the pushing process, the U-shaped pusher plate 601 always slides along the guide rods 103, which improves the stability of the pushing process.

[0054] The working principle of this invention is as follows: Figures 1-12As shown, during the stacking of leaf springs, the lifting cylinder 2 is controlled to raise the mounting frame 3 upwards, causing the arc-shaped support block 301 to rise to a suitable height, allowing the lowest leaf spring to abut against the arc-shaped support block 301. Simultaneously, the air pump 302 pumps air upwards through the air pipe 303 to the annular cavity 412. At this time, the air pressure will push the sleeve 420 downwards, and the center pin 430 will push upwards. Then, multiple leaf springs are 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 opposite clamping bending plates 834 will move closer to 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 it from shifting during the stacking and compaction process. After stacking, the U-shaped pusher 501, driven by the downward-pressing cylinder 5, compresses the multiple leaf springs, reducing the spacing between them to achieve compaction. After compaction, the air pump 302 draws air from above the annular cavity 412 through the air pipe 303. The center pin 430 retracts downwards from the leaf spring into the sleeve 420. Then, a locking bolt is manually inserted into the center hole of the leaf spring, while the sleeve 420 pushes the nut upwards until it engages with the bottom of the locking bolt. The rotary motor 450 starts, driving the rotary gear 451 to rotate. The rotary gear 451, through the transmission belt 452, drives the mating gear 441 to rotate. The moving sleeve then drives the sleeve 420 to rotate, thereby tightening the nut. The lifting cylinder 810 drives the toothed plates 820 at both ends to move upward. The toothed plates 820 drive the steering gear 840 to rotate, and through the rotating shaft 836 drive the entire frame 830 to rotate until the clamping bending plate 834 rotates to intersect with the two ends of the reserved U-shaped clamp. At this time, the bidirectional screw 832 controls the clamping bending plates 834 on both sides to move closer to each other. The clamping bending plates 834 apply pressure to the two ends of the U-shaped clamp until bending is formed, thus shaping the leaf spring. After the leaf spring is shaped, the lifting cylinder 2 drives the mounting bracket 3 to descend, providing sufficient testing space for the testing end 702. The testing cylinder 7 drives the mounting base 701 to extend until the testing end 702 moves directly below the leaf spring. The pressing cylinder 5 begins to push the shaped leaf spring, and the testing end 702 is used to test whether the vibration damping performance of the leaf spring meets the standard. After the inspection is completed, the pusher cylinder 6 starts to push the U-shaped pusher plate 601. The U-shaped pusher plate 601 pushes the steel leaf spring to slide along the positioning post 102 until it is disengaged, thereby realizing the integrated stacking process of compacting, clamping, tightening nuts, U-shaped clamp bending, inspection and unloading of the steel leaf spring.

[0055] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A steel plate spring stacking device, comprising a workbench (1), a jacking cylinder (2) is fixedly arranged at the bottom of the workbench (1), and a back plate (101) is 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 bracket (3). Arc-shaped support blocks (301) are fixedly installed on both sides of the upper end of the mounting bracket (3). A nut tightening assembly (4) is installed inside the mounting bracket (3). Positioning posts (102) are fixedly installed at both ends of the back plate (101). The lowest steel plate spring presses against the arc-shaped support block (301) and its two ends are slidably installed on the positioning post (102) through the lugs. A pressing cylinder is fixedly installed at the top of the back plate (101). (5) The output end of the pressing cylinder (5) is connected to a U-shaped pusher (501). The back plate (101) is fixedly provided with a pushing cylinder (6) and a detection cylinder (7). The output end of the pushing cylinder (6) is connected to a U-shaped pushing plate (601). The output end of the detection cylinder (7) is connected to a mounting base (701). The mounting base (701) is fixedly provided with a detection end (702). The back plate (101) is provided with a clamping bending assembly (8). The clamping and bending assembly (8) includes a lifting cylinder (810), a set of symmetrically arranged toothed plates (820), and a set of symmetrically arranged stands (830). The lifting cylinder (810) is fixedly mounted 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). Each stand (830) is rotatably mounted with a bidirectional screw (832). 832) A pair of movable seats (833) are threaded through both ends. Each movable seat (833) has a clamping bending plate (834) extending from its upper end. The clamping bending plate (834) is symmetrically arranged on the front and rear sides of the steel leaf spring. One end of the frame (830) is rotatably engaged with the back plate (101) through a rotating shaft (836). A steering gear (840) is fixedly sleeved on the rotating shaft (836). The steering gear (840) meshes with the corresponding toothed plate (820). A baffle (821) is fixedly provided at the bottom end of the toothed plate (820). A slide rod (822) is slidably provided through the baffle (821). A fixed seat (823) is fixedly connected to the bottom end of the slide rod (822). One side of the fixed seat (823) is fixedly installed on the back plate (101). A return spring (824) is provided between the baffle (821) and the fixed seat (823). The screw nut assembly (4) includes an outer sleeve (410), a sleeve (420), and a center pin (430) arranged coaxially from the outside to the inside. The outer sleeve (410) is fixedly mounted 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 venting cavity (413) communicating with the inner cavity of the inner sleeve (411) is provided at the bottom of the outer sleeve (410). The bottom of the annular cavity (412) is connected to the venting cavity (413) through a vent hole (414). An air pump (302) is fixedly mounted inside the mounting frame (3). The air pump (302) is connected to the top of the annular cavity (412) through an air pipe (303). 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 bracket (3). A nut groove (422) is provided at the upper end of the sleeve (420).

2. The steel leaf spring stacking device according to claim 1, characterized in that, A drive motor (831) is fixedly installed on one side of the platform (830). The output end of the drive motor (831) is connected to a bidirectional screw (832). A light rod (835) is fixedly installed inside the platform (830). The bottom of the movable seat (833) is slidably installed on the light rod (835).

3. The steel leaf spring stacking device according to claim 1, characterized in that, The depth of the nut groove (422) is one-third of the thickness of the locking nut.

4. The steel leaf spring stacking device according to claim 1, characterized in that, The bottom end of the center pin (430) is fixedly provided with a second piston (431), which is slidably installed in the inner cavity of the inner sleeve (411). The top end of the center pin (430) extends upward from the sleeve (420).

5. A steel leaf spring stacking device according to claim 4, characterized in that, A bracket (304) is fixedly installed on one side of the mounting bracket (3). A drive sleeve (440) is rotatably installed on the bracket (304). The sleeve (420) is slidably installed inside the drive sleeve (440). A mating gear (441) is fixedly installed on the outside of the sleeve (420). A rotary motor (450) is fixedly installed at the bottom of the bracket (304). A rotary gear (451) is connected to the output end of the rotary motor (450). The mating gear (441) and the rotary gear (451) are connected by a transmission belt (452).

6. A steel leaf spring stacking device according to claim 5, characterized in that, The sleeve (420) has a longitudinally arranged limiting groove (423) on its outer wall, and the drive sleeve (440) has a longitudinally arranged limiting strip (442) on its inner wall. The limiting strip (442) is adapted to slide and install in the limiting groove (423).

7. A steel leaf spring stacking device according to claim 1, characterized in that, The back plate (101) has guide rods (103) fixedly installed at both ends, which are parallel to the positioning post (102). The two ends of the U-shaped pusher plate (601) are slidably installed on the guide rods (103).

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