Leaf spring automatic assembly device

Abstract

The present invention discloses an automatic leaf spring assembly device, comprising: a base positioning module, a leaf spring feeding module, a pre-alignment module, and a rotary shaft pushing module. The base positioning module is used to compress and secure the base, the leaf spring feeding module is used to compress and secure the leaf spring and feed the leaf spring into the base positioning module. The pre-alignment module includes a pre-alignment rod, a pre-alignment spring, a pre-alignment rod pushing mechanism, and a pre-alignment rod reset mechanism. The pre-alignment rod, under the action of the pre-alignment spring, can be partially inserted into the leaf spring and the base. The pre-alignment rod pushing mechanism is used to drive the pre-alignment rod to fully insert into the leaf spring and the base. The pre-alignment rod reset mechanism is used to drive the pre-alignment rod out of a first axial hole in the leaf spring and a second axial hole in the base, thereby compressing the pre-alignment spring. The rotary shaft pushing module is used to push the rotary shaft into the leaf spring and the base. The present invention can achieve automatic and precise assembly of leaf springs, improve production efficiency, and reduce labor costs.

Description

Technical Field

[0001] The present invention relates to the technical field of parts assembly equipment, in particular to an automatic leaf spring assembly device. Background Art

[0002] In the manufacturing of 3C products, such as earphone housing modules, leaf springs are a crucial component that must be assembled to the base. Due to the small size of the leaf springs and the difficulty in aligning the spring's assembly axis with the base, automated assembly using robotic arms and other equipment is challenging. Existing technology relies on manual assembly, resulting in high labor costs and very low production efficiency. Summary of the Invention

[0003] The problem to be solved by the present invention is to provide an automatic leaf spring assembly device to overcome the defects of the existing leaf spring assembly, such as high labor cost and low production efficiency.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an automatic leaf spring assembly device for assembling a leaf spring on a base through a rotating shaft, comprising: a base positioning module, a leaf spring feeding module, a pre-alignment module and a rotating shaft pushing module;

[0005] The base positioning module includes a first positioning seat and a first pressing mechanism, wherein the first pressing mechanism is used to press the base placed on the first positioning seat;

[0006] The leaf spring feeding module includes a second positioning seat, a second pressing mechanism and a feeding drive device, wherein the second pressing mechanism is used to press the leaf spring placed on the second positioning seat, and the feeding drive device is used to drive the second positioning seat to carry the leaf spring into the base positioning module, so that the first axial hole of the leaf spring is opposite to the second axial hole of the base;

[0007] The pre-alignment module includes a pre-alignment rod, a pre-alignment spring, a pre-alignment rod pushing mechanism, and a pre-alignment rod reset mechanism. The pre-alignment rod can be partially inserted into the first axial hole of the leaf spring and the second axial hole of the base under the elastic force applied by the pre-alignment spring; the pre-alignment rod pushing mechanism is used to drive the pre-alignment rod to be fully inserted into the first axial hole of the leaf spring and the second axial hole of the base; the pre-alignment rod reset mechanism is used to drive the pre-alignment rod to withdraw from the first axial hole of the leaf spring and the second axial hole of the base and compress the pre-alignment spring;

[0008] The rotating shaft pushing module includes a third positioning seat and a pushing mechanism, and the pushing mechanism is used to push the rotating shaft placed in the third positioning seat into the first shaft hole of the leaf spring and the second shaft hole of the base.

[0009] As a further improvement of the present invention, the first pressing mechanism includes a first base, a first rotating pressure block rotatably mounted on the first base, a first slider slidably mounted on the first base, and a first cylinder fixed on the first base. The first rotating pressure block and the first slider are rotatably connected via a first connecting rod. A first sliding rod is fixed on the cylinder shaft of the first cylinder. The first sliding rod is slidably connected to the first slider, and a first spring is also mounted on the first sliding rod. The first cylinder drives the first slider to slide through the first sliding rod and the first spring, and drives the first rotating pressure block to rotate through the first connecting rod.

[0010] As a further improvement of the present invention, the second pressing mechanism includes a second base, a second rotating pressure block rotatably mounted on the second base, a second slider slidably mounted on the second base, and a second cylinder fixed on the second base. The second rotating pressure block and the second slider are rotatably connected via a second connecting rod. A second sliding rod is fixed on the cylinder shaft of the second cylinder. The second sliding rod is slidably connected to the second slider, and a second spring is also mounted on the second sliding rod. The second cylinder drives the second sliding rod to slide through the second sliding rod and the second spring, and drives the second rotating pressure block to rotate through the second connecting rod.

[0011] As a further improvement of the present invention, the second base is fixed on the feeding drive device, and the feeding drive device adopts a linear motor module, or is composed of a servo motor and a KK module, a screw module or a synchronous belt module.

[0012] As a further improvement of the present invention, the pre-alignment module also includes a first push block, the pre-alignment rod is installed on the first push block, and the pre-alignment spring elastically abuts against the first push block to apply an elastic force to the first push block toward the base positioning module; the pre-alignment rod pushing mechanism includes a pre-alignment pushing cylinder and a second push block, the second push block is fixedly connected to the first push block and is arranged opposite to the cylinder axis of the pre-alignment pushing cylinder.

[0013] As a further improvement of the present invention, the pre-alignment rod reset mechanism includes a reset cylinder and a reset push block, the reset push block is fixedly connected to the reset cylinder and is located on one side of the second push block, and the reset cylinder is used to drive the reset push block to push the second push block to move in the direction away from the base positioning module, thereby driving the first push block and the pre-alignment rod to reset.

[0014] As a further improvement of the present invention, a first pressure sensor is installed between the pre-alignment rod and the first push block, and the first pressure sensor is used to detect the force applied by the pre-alignment spring to the pre-alignment rod. The controller of the leaf spring automatic assembly device determines the state of the pre-alignment rod entering the first axial hole of the leaf spring and the second axial hole of the base according to the force detected by the first pressure sensor.

[0015] As a further improvement of the present invention, the rotating shaft pushing module also includes a base plate, the pushing mechanism includes a third cylinder fixed on the base plate and a third push block and a fourth push block slidably installed on the base plate, the third cylinder is fixedly connected to the third push block, a third spring is installed between the third push block and the fourth push block, the third positioning seat is fixed on the fourth push block, and a stopper for stopping the fourth push block is provided on the base plate; a push rod is installed on the third push block, and the push rod is used to push the rotating shaft out of the third positioning seat and insert it into the first axial hole of the leaf spring and the second axial hole of the base.

[0016] As a further improvement of the present invention, a guide groove is provided inside the third positioning seat, and a discharge port connected to the guide groove is provided on the top of the third positioning seat. The rotating shaft pushing module also includes a pressing mechanism, which is used to press the rotating shaft placed at the discharge port into the guide groove.

[0017] As a further improvement of the present invention, the pressing mechanism includes a fourth cylinder fixed on the fourth push block and a third rotating pressing block rotatably mounted on the fourth push block. A hinged joint is installed on the cylinder shaft of the fourth cylinder, and the hinged joint is rotatably connected to the third rotating pressing block through a third connecting rod.

[0018] The beneficial effects of the present invention are as follows: the present invention provides an automatic leaf spring assembly device, which includes a base positioning module, a leaf spring feeding module, a pre-alignment module and a rotating shaft pushing module. The base positioning module is used to press and position the base, the leaf spring feeding module is used to press and position the leaf spring and can feed the leaf spring into the base positioning module so that the leaf spring and the base are aligned, and then the pre-alignment module is used to pre-align the leaf spring and the base before the rotating shaft is pushed in, so that the first axial hole of the leaf spring and the second axial hole of the base are completely and accurately aligned, and finally the rotating shaft pushing module is used to push the rotating shaft into the leaf spring and the base to realize automatic and precise assembly of leaf spring products, greatly improve production efficiency, reduce labor costs, and have a high degree of automation; at the same time, the pre-alignment rod of the present invention adopts a two-step pushing method, which can effectively avoid the breakage of the pre-alignment rod and ensure the continuous production of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A perspective view of the leaf spring automatic assembly device of the present invention;

[0020] Figure 2 A three-dimensional diagram of a base positioning module of the leaf spring automatic assembly device of the present invention;

[0021] Figure 3 A three-dimensional diagram of a leaf spring feeding module of the leaf spring automatic assembly device of the present invention;

[0022] Figure 4 A three-dimensional diagram of a pre-alignment module of the leaf spring automatic assembly device of the present invention;

[0023] Figure 5 A perspective view of the rotary shaft pushing module of the leaf spring automatic assembly device of the present invention;

[0024] Figure 6 A cross-sectional view of a rotary shaft pushing module of the leaf spring automatic assembly device of the present invention;

[0025] Figure 7 This is a cross-sectional view of the third positioning seat of the leaf spring automatic assembly device of the present invention.

[0026] The following description is made with reference to the accompanying drawings:

[0027] 1. Leaf spring; 2. Base; 3. Rotating shaft; 4. Base positioning module; 40. First base; 41. First positioning seat; 42. First rotating pressure block; 43. First slider; 44. First cylinder; 45. First connecting rod; 46. First slide bar; 47. First spring; 48. Guide block; 5. Leaf spring feeding module; 50. Second base; 51. Second positioning seat; 52. Feeding drive device; 53. Second rotating pressure block; 54. Second slider; 55. Second cylinder; 56. Second connecting rod; 57. Second slide bar; 58. Second spring; 6. Pre-alignment module; 61. Pre-alignment Position rod; 62, pre-alignment spring; 63, first push block; 64, pre-alignment push cylinder; 65, second push block; 66, reset cylinder; 67, reset push block; 68, first pressure sensor; 7, rotary shaft pushing module; 70, bottom plate; 71, third positioning seat; 72, third cylinder; 73, third push block; 74, fourth push block; 75, third spring; 76, stop block; 77, second pressure sensor; 78, push rod; 79, fourth cylinder; 791, hinged joint; 792, third connecting rod; 710, third rotating pressure block; 711, guide groove; 712, discharge port. DETAILED DESCRIPTION

[0028] A preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0029] The present invention provides an automatic leaf spring assembly device, which is used to assemble a leaf spring 1 on a base 2 through a rotating shaft 3, wherein the base 2 is provided with a receiving groove for installing the leaf spring 1, and second axial holes are provided on both sides of the receiving groove. A first axial hole is provided on the leaf spring 1, the leaf spring 1 is installed in the receiving groove, and the rotating shaft 3 is inserted into the second axial hole and the first axial hole.

[0030] See Figures 1 to 7 The leaf spring automatic assembly device includes a base positioning module 4, a leaf spring feeding module 5, a pre-alignment module 6, and a rotary shaft pushing module 7. These modules are arranged in a cross shape, with the base positioning module 4 and leaf spring feeding module 5 facing each other, and the pre-alignment module 6 and rotary shaft pushing module 7 on either side of the base positioning module 4.

[0031] Furthermore, the base positioning module 4 is used to compress and position the base 2, and the leaf spring feeding module 5 is used to compress and position the leaf spring 1, and can feed the leaf spring 1 into the base positioning module 4 so that the leaf spring 1 is in the receiving groove of the base 2, thereby realizing the alignment of the leaf spring 1 and the base 2; the rotating shaft pushing module 7 is used to push the rotating shaft 3 into the leaf spring 1 and the base 2 to realize the automatic assembly of the leaf spring 1, thereby reducing labor costs and improving production efficiency.

[0032] It's worth noting that the leaf spring feeding module 5, when feeding the leaf spring 1 into the base positioning module 4, cannot guarantee that the leaf spring 1 and the base 2 are always precisely aligned. This can cause the rotating shaft pushing module 7 to be unable to push the rotating shaft 3 into the leaf spring 1 and base 2, which can easily cause component damage. Therefore, the present invention uses a pre-alignment module 6 to pre-align the leaf spring 1 and base 2 before the rotating shaft 3 is pushed in, ensuring that the first axial hole of the leaf spring 1 and the second axial hole of the base 2 are precisely aligned, thereby improving assembly accuracy and preventing component damage.

[0033] See Figure 2 The base positioning module 4 includes a first positioning seat 41 and a first pressing mechanism. The first positioning seat 41 is provided with a first positioning groove that is shaped like the base 2, and the base 2 is placed in the first positioning groove. The placement of the base 2 can be done manually or by a robot. The first pressing mechanism is used to press the base 2 placed on the first positioning seat 41.

[0034] Specifically, the first pressing mechanism includes a first base 40, a first rotating pressure block 42 rotatably mounted on the first base 40, a first slider 43 slidably mounted on the first base 40, and a first cylinder 44 fixed to the first base 40. A first positioning seat 41 is fixed to one end of the first base 40 and is located in front of the first rotating pressure block 42. The first rotating pressure block 42 and the first slider 43 are rotatably connected via a first connecting rod 45. A first slide bar 46 is fixedly connected to the cylinder shaft of the first cylinder 44. The first slide bar 46 is slidably connected to the first slider 43. A first spring 47 is also mounted on the first slide bar 46. One end of the first spring 47 elastically abuts the first slider 43, and the other end of the first spring 47 elastically abuts a boss on the first slide bar 46.

[0035] When the first cylinder 44 drives the first slide bar 46 forward, the first slide bar 46 pushes the first slider 43 forward through the first spring 47, and then the first slider 43 drives the first rotating pressure block 42 to rotate downward and press it onto the first positioning seat 41 through the first connecting rod 45, so as to press and fix the base 2 placed on the first positioning seat 41. By adopting this method, the base 2 is positioned and pressed and fixed, and the adaptive pressure generated by the first spring 47 can prevent the base 2 from being damaged by pressure. When the first cylinder 44 drives the first slide bar 46 backward, the hanging platform at the end of the first slide bar 46 pulls the first slider 43 to return to its original position, and then the first slider 43 drives the first rotating pressure block 42 to rotate upward and leave the first positioning seat 41 through the first connecting rod 45.

[0036] See Figure 3 The leaf spring feeding module 5 includes a second positioning seat 51, a second pressing mechanism, and a feeding drive 52. The second positioning seat 51 is provided with a second positioning groove shaped like the leaf spring 1, into which the leaf spring 1 is placed. Similarly, placement of the leaf spring 1 can be performed manually or robotically. The second pressing mechanism is used to press and position the leaf spring 1 placed on the second positioning seat 51.

[0037] Specifically, the second pressing mechanism includes a second base 50, a second rotating pressure block 53 rotatably mounted on the second base 50, a second slider 54 slidably mounted on the second base 50, and a second cylinder 55 fixed to the second base 50. A second positioning seat 51 is fixed to one end of the second base 50 and is located in front of the second rotating pressure block 53. The second rotating pressure block 53 and the second slider 54 are rotatably connected via a second connecting rod 56. A second slide bar 57 is fixed to the cylinder shaft of the second cylinder 55. The second slide bar 57 is slidably connected to the second slider 54. A second spring 58 is also mounted on the second slide bar 57. One end of the second spring 58 elastically abuts the second slider 54, and the other end of the second spring 58 elastically abuts a boss on the second slide bar 57.

[0038] When the second cylinder 55 drives the second slide bar 57 forward, the second slide bar 57 pushes the second slider 54 forward via the second spring 58, and then the second slider 54 drives the second rotating pressure block 53 to rotate downward and press it onto the second positioning seat 51 via the second connecting rod 56, so as to press and fix the leaf spring 1 placed on the second positioning seat 51. By adopting this method, the leaf spring 1 is positioned and pressed and fixed, and the adaptive pressure generated by the second spring 58 can prevent the leaf spring 1 from being damaged by pressure. When the second cylinder 55 drives the second slide bar 57 backward, the hanging platform at the end of the second slide bar 57 pulls the second slide bar 54 back to its original position, and then the second slide bar 54 drives the second rotating pressure block 53 to rotate upward and leave the second positioning seat 51 via the second connecting rod 56.

[0039] Among them, the second base 50 is fixed on the feeding drive device 52, which is used to drive the second pressing mechanism and the second positioning seat 51 to carry the leaf spring 1 into the base positioning module 4, and make the first axial hole of the leaf spring 1 opposite to the second axial hole of the base 2.

[0040] Optionally, the feeding drive device 52 adopts a linear motor module, or is composed of a servo motor and a KK module, a screw module or a synchronous belt module. In this embodiment, the feeding drive device 52 is specifically composed of a servo motor and a KK module.

[0041] See Figure 4 The pre-alignment module 6 includes a pre-alignment rod 61, a pre-alignment spring 62, a first push block 63, a pre-alignment rod pushing mechanism, and a pre-alignment rod reset mechanism. The first push block 63 is slidably mounted on a slide rail. The pre-alignment rod 61 is mounted on the side of the first push block 63 facing the base positioning module 4. The pre-alignment spring 62 elastically abuts the other side of the first push block 63 facing away from the base positioning module 4, thereby applying an elastic force to the first push block 63 toward the base positioning module 4.

[0042] The pre-alignment rod pushing mechanism includes a pre-alignment pushing cylinder 64 and a second pushing block 65. The second pushing block 65 is fixedly connected to the first pushing block 63 and is arranged opposite to the cylinder axis of the pre-alignment pushing cylinder 64. There is no fixed connection between the second pushing block 65 and the pre-alignment pushing cylinder 64.

[0043] The pre-alignment rod reset mechanism includes a reset cylinder 66 and a reset push block 67. The reset cylinder 66 is arranged next to the pre-alignment push cylinder 64. The reset push block 67 is slidably mounted on another slide rail and fixedly connected to the reset cylinder 66. The reset push block 67 is located on the outside of the second push block 65 facing the base positioning module 4.

[0044] Initially, the reset cylinder 66 is in a retracted state, which pulls the reset push block 67 to press on the second push block 65, so that the pre-alignment rod 61 and the first push block 63 are in their original positions. At this time, the pre-alignment spring 62 is in a compressed state. When the pre-alignment module 6 is working, the reset cylinder 66 first drives the reset push block 67 to slide along the slide rail toward the base positioning module 4 to release the pressure on the second push block 65. At the same time, the first push block 63 can partially insert the pre-alignment rod 61 into the leaf spring 1 and the base 2 under the elastic force exerted by the pre-alignment spring 62; then the pre-alignment push cylinder 64 pushes the second push block 65 to continue moving toward the base positioning module 4. The second push block 65 drives the first push block 63 to make the pre-alignment rod 61 completely inserted into the first axial hole of the leaf spring 1 and the second axial hole of the base 2, thereby achieving precise alignment of the leaf spring 1 and the base 2 to ensure assembly accuracy. After the pre-alignment is completed, the pre-alignment push cylinder 64 is reset first, and then the reset cylinder 66 drives the reset push block 67 to move in the direction away from the base positioning module 4. The reset push block 67 will drive the second push block 65, the first push block 63 and the pre-alignment rod 61 to reset, so that the pre-alignment rod 61 withdraws from the first axial hole of the leaf spring 1 and the second axial hole of the base 2, and compresses the pre-alignment spring 62.

[0045] It should be noted that, since the apertures of the first axial hole of the leaf spring 1 and the second axial hole of the base 2 in this embodiment are relatively small (approximately about 0.4 mm), the diameter of the pre-alignment rod 61 is also relatively small. If the pre-alignment push cylinder 64 is used to directly push the pre-alignment rod 61, once the position deviation between the leaf spring 1 and the base 2 is large, the thrust of the pre-alignment push cylinder 64 is large, which can easily cause the pre-alignment rod 61 to break. Therefore, the present invention adopts a two-step approach to push the pre-alignment rod 61. In the first step, the pre-alignment spring 62 is driven to push the rod into the leaf spring 1 and the base 2. By selecting a suitable elastic force value of the pre-alignment spring 62, the pre-alignment rod 61 can partially enter the leaf spring 1 and the base 2 under the elastic force of the pre-alignment spring 62, that is, the pre-alignment rod 61 passes through one of the second axial holes of the base 2 and extends into the middle of the first axial hole of the leaf spring 1. At this time, the assembly resistance of the pre-alignment rod 61 with the leaf spring 1 and the base 2 is greater than the elastic force of the pre-alignment spring 62. The pre-alignment rod 61 remains in this state and is then pushed into the base 2 completely by the pre-alignment push cylinder 64. Since the elastic force value of the pre-alignment spring 62 is relatively small, even if the position deviation between the leaf spring 1 and the base 2 is relatively large, the pre-alignment spring 62 is unlikely to cause the pre-alignment rod 61 to break when driving the pre-alignment rod 61.

[0046] It is worth mentioning that the present invention installs a first pressure sensor 68 between the pre-alignment rod 61 and the first push block 63. The first pressure sensor 68 is used to detect the force applied by the pre-alignment spring 62 to the pre-alignment rod 61. The controller of the leaf spring automatic assembly device determines the state of the pre-alignment rod 61 entering the first axial hole of the leaf spring 1 and the second axial hole of the base 2 according to the force detected by the first pressure sensor 68.

[0047] Under normal conditions, that is, the pre-alignment rod 61 passes through one of the second axial holes of the base 2 under the action of the pre-alignment spring 62 and extends into the middle of the first axial hole of the leaf spring 1. At this time, the controller determines that the state of the pre-alignment rod 61 is qualified based on the force detected by the first pressure sensor 68. Then the controller controls the pre-alignment pushing cylinder 64 to start and push the pre-alignment rod 61 completely into the first axial hole of the leaf spring 1 and the second axial hole of the base 2.

[0048] In an abnormal state, that is, the position of the leaf spring 1 and / or the base 2 deviates, resulting in the pre-alignment rod 61 being unable to enter the first axial hole or the second axial hole under the action of the pre-alignment spring 62, and failing to reach the predetermined position. At this time, the force detected by the first pressure sensor 68 is large, and the controller determines that the state of the pre-alignment rod 61 entering is unqualified based on the force. At this time, manual intervention can be performed to correct the position of the leaf spring 1 and the base 2.

[0049] like Figure 2 As shown, a guide block 48 is fixed on the side of the first positioning seat 41 facing the pre-alignment module 6. The pre-alignment rod 61 passes through the guide block 48 and enters the first axial hole of the leaf spring 1 and the second axial hole of the base 2. The guide block 48 is used to guide the pre-alignment rod 61.

[0050] See Figures 5 to 7 The rotating shaft installation module 7 includes a base plate 70, a third positioning seat 71, and a pushing mechanism. A guide groove 711 is defined within the third positioning seat 71. A discharge port 712, connected to the guide groove 711, is located at the top of the third positioning seat 71. The rotating shaft 3 is placed into the guide groove 711 through the discharge port 712. The pushing mechanism is used to fully push the rotating shaft 3, once placed in the guide groove 711, into the first shaft hole of the leaf spring 1 and the second shaft hole of the base 2.

[0051] Specifically, the pushing mechanism includes a third cylinder 72 fixed to the base plate 70, and a third push block 73 and a fourth push block 74 slidably mounted on the base plate 70. The third cylinder 72 is fixedly connected to the third push block 73. A third spring 75 is installed between the third push block 73 and the fourth push block 74. The third positioning seat 71 is fixed to the fourth push block 74. A push rod 78 is mounted on the third push block 73. The push rod 78 slidably penetrates the fourth push block 74, and one end of the push rod 78 extends into the guide groove 711 of the third positioning seat 71.

[0052] A stopper 76 for stopping the fourth push block 74 is further provided on the bottom plate 70 .

[0053] In addition, the rotating shaft pushing module 7 also includes a pressing mechanism for pressing the rotating shaft 3 placed on the discharge port 712 into the guide groove 711. The pressing mechanism includes a fourth cylinder 79 fixed to the fourth push block 74 and a third rotating pressing block 710 rotatably mounted on the fourth push block 74. The cylinder shaft of the fourth cylinder 79 is mounted with a hinged joint 791, which is rotatably connected to the third rotating pressing block 710 via a third connecting rod 792.

[0054] The installation process of the rotating shaft 3 is as follows:

[0055] First, the rotating shaft 3 is placed at the discharge port 712 by manual or mechanical means, and then the fourth cylinder 79 drives the third rotating pressure block 710 to rotate downward through the hinge joint 791 and the third connecting rod 792, pressing the rotating shaft 3 into the guide groove 711 to ensure that the rotating shaft 3 is completely in the guide groove 711, and then the fourth cylinder 79 drives the third rotating pressure block 710 to reset; then the third cylinder 72 retracts, and the third cylinder 72 drives the third push block 73 to move toward the base positioning module 4, and the third push block 73 will push the fourth push block 74 through the third spring 75 to drive the third positioning seat 71 to move toward the base positioning module 4 until the fourth push block 74 is stopped by the stop block 76. At this time, the third positioning seat 71 has moved into place, so that the guide groove 711 is docked with the second shaft hole of the base 2. Next, the third cylinder 72 continues to drive the third push block 73 to move, and the fourth push block 74 is stopped by the stop block 76 and no longer moves. The third spring 75 is compressed, and the third push block 73 drives the push rod 78 to push the rotating shaft 3 out of the third positioning seat 71 and fully insert it into the first shaft hole of the leaf spring 1 and the second shaft hole of the base 2, completing the assembly of the rotating shaft 3.

[0056] A second pressure sensor 77 is installed between the third push block 73 and the push rod 78 to determine whether the rotating shaft 3 is pushed into place.

[0057] The working process of the leaf spring automatic assembly device of the present invention is as follows:

[0058] S1, placing the base 2 on the first positioning seat 41 and pressing and fixing it with a first pressing mechanism;

[0059] S2, placing the leaf spring 1 on the second positioning seat 51 and pressing and fixing it with the second pressing mechanism;

[0060] S3, the feeding drive device 52 drives the second pressing mechanism and the second positioning seat 51 to carry the leaf spring 1 into the base positioning module 4, so that the first axial hole of the leaf spring 1 is opposite to the second axial hole of the base 2;

[0061] S4, the reset cylinder 66 drives the reset push block 67 to slide to release the pressure on the second push block 65. At the same time, the first push block 63, under the elastic force exerted by the pre-alignment spring 62, partially inserts the pre-alignment rod 61 into the leaf spring 1 and the base 2;

[0062] S5, the pre-alignment push cylinder 64 pushes the second push block 65 to continue moving toward the base positioning module 4, and the second push block 65 drives the first push block 63 to completely insert the pre-alignment rod 61 into the first axial hole of the leaf spring 1 and the second axial hole of the base 2;

[0063] S6, the pre-alignment push cylinder 64 is reset first, and the reset cylinder 66 is reset later;

[0064] S7, the rotating shaft 3 is placed at the discharge port 712 of the third positioning seat 71, and the fourth cylinder 79 drives the third rotating pressing block 710 to rotate downward to press the rotating shaft 3 into the guide groove 711; this step can be performed simultaneously with S1 to S6;

[0065] S8, the third cylinder 72 drives the third push block 73 to move the fourth push block 74 and the third positioning seat 71 toward the base positioning module 4 until the fourth push block 74 is stopped by the stop block 76. At this time, the third positioning seat 71 has moved into place, so that the guide groove 711 is connected to the second shaft hole of the base 2;

[0066] S9, the third cylinder 72 continues to drive the third push block 73 to move, and the third push block 73 drives the push rod 78 to push the rotating shaft 3 out of the third positioning seat 71 and fully insert it into the first shaft hole of the leaf spring 1 and the second shaft hole of the base 2;

[0067] S10, the third cylinder 72 is reset first, the feeding drive device 52 is reset, and then the first pressing mechanism and the second pressing mechanism are reset, and the assembled product is taken out.

[0068] It can be seen that the automatic leaf spring assembly device of the present invention includes a base positioning module 4, a leaf spring feeding module 5, a pre-alignment module 6 and a rotating shaft pushing module 7. The base positioning module 4 is used to press and position the base 2. The leaf spring feeding module 5 is used to press and position the leaf spring 1 and can feed the leaf spring 1 into the base positioning module 4 so that the leaf spring 1 and the base 2 are aligned. Then, the pre-alignment module 6 is used to pre-align the leaf spring 1 and the base 2 before the rotating shaft 3 is pushed in, so that the first axial hole of the leaf spring 1 and the second axial hole of the base 2 are completely and accurately aligned. Finally, the rotating shaft 3 is pushed into the leaf spring 1 and the base 2 by relying on the rotating shaft pushing module 7 to realize automatic and precise assembly of leaf spring 1 products, with a high degree of automation, reduced labor costs, and improved production efficiency. At the same time, the pre-alignment rod 61 of the present invention adopts a two-step pushing method, which can effectively avoid the breakage of the pre-alignment rod 61 and ensure the continuous production of the machine.

[0069] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. An automatic leaf spring assembly device for assembling a leaf spring (1) on a base (2) via a rotating shaft (3), characterized in that: include: Base positioning module (4), leaf spring feeding module (5), pre-alignment module (6) and rotary axis pushing module (7); The base positioning module (4) comprises a first positioning seat (41) and a first pressing mechanism, wherein the first pressing mechanism is used to press the base (2) placed on the first positioning seat (41); The leaf spring feeding module (5) comprises a second positioning seat (51), a second pressing mechanism and a feeding drive device (52), wherein the second pressing mechanism is used to press the leaf spring (1) placed on the second positioning seat (51), and the feeding drive device (52) is used to drive the second positioning seat (51) to carry the leaf spring (1) into the base positioning module (4), and to make the first axial hole of the leaf spring (1) face the second axial hole of the base (2); The pre-alignment module (6) includes a pre-alignment rod (61), a pre-alignment spring (62), a pre-alignment rod pushing mechanism and a pre-alignment rod reset mechanism, wherein the pre-alignment rod (61) can be partially inserted into the first axial hole of the leaf spring (1) and the second axial hole of the base (2) under the elastic force applied by the pre-alignment spring (62); the pre-alignment rod pushing mechanism is used to drive the pre-alignment rod (61) to be completely inserted into the first axial hole of the leaf spring (1) and the second axial hole of the base (2); the pre-alignment rod reset mechanism is used to drive the pre-alignment rod (61) to withdraw from the first axial hole of the leaf spring (1) and the second axial hole of the base (2) and compress the pre-alignment spring (62); The rotating shaft pushing module (7) comprises a base plate (70), a third positioning seat (71) and a pushing mechanism, wherein the pushing mechanism is used to push the rotating shaft (3) placed in the third positioning seat (71) into the first shaft hole of the leaf spring (1) and the second shaft hole of the base (2); the pushing mechanism comprises a third cylinder (72) fixed on the base plate (70) and a third pushing block (73) and a fourth pushing block (74) slidably mounted on the base plate (70), the third cylinder (72) is fixedly connected to the third pushing block (73), a third spring (75) is installed between the third pushing block (73) and the fourth pushing block (74), and the third positioning seat (71) is fixed to the fourth pushing block (74). The bottom plate (70) is provided with a stopper (76) for stopping the fourth push block (74); the third push block (73) is installed with a push rod (78), and the push rod (78) is used to push the rotating shaft (3) out of the third positioning seat (71) and insert it into the first shaft hole of the leaf spring (1) and the second shaft hole of the base (2); the interior of the third positioning seat (71) is provided with a guide groove (711), and the top of the third positioning seat (71) is provided with a discharge port (712) connected to the guide groove (711), and the rotating shaft pushing module (7) also includes a pressing mechanism, and the pressing mechanism is used to press the rotating shaft (3) placed at the discharge port (712) into the guide groove (711).

2. The leaf spring automatic assembly device according to claim 1, characterized in that: The first pressing mechanism includes a first base (40), a first rotating pressing block (42) rotatably mounted on the first base (40), a first slider (43) slidably mounted on the first base (40), and a first cylinder (44) fixed on the first base (40). The first rotating pressing block (42) and the first slider (43) are rotatably connected via a first connecting rod (45). A first sliding rod (46) is fixed on the cylinder shaft of the first cylinder (44). The first sliding rod (46) is slidably connected to the first slider (43), and a first spring (47) is also mounted on the first sliding rod (46). The first cylinder (44) drives the first slider (43) to slide via the first sliding rod (46) and the first spring (47), and drives the first rotating pressing block (42) to rotate via the first connecting rod (45).

3. The leaf spring automatic assembly device according to claim 1, characterized in that: The second pressing mechanism includes a second base (50), a second rotating pressing block (53) rotatably mounted on the second base (50), a second slider (54) slidably mounted on the second base (50), and a second cylinder (55) fixed on the second base (50). The second rotating pressing block (53) and the second slider (54) are rotatably connected via a second connecting rod (56). A second sliding rod (57) is fixed on the cylinder shaft of the second cylinder (55). The second sliding rod (57) is slidably connected to the second slider (54), and a second spring (58) is also mounted on the second sliding rod (57). The second cylinder (55) drives the second sliding rod (57) to slide via the second sliding rod (57) and the second spring (58), and drives the second rotating pressing block (53) to rotate via the second connecting rod (56).

4. The leaf spring automatic assembly device according to claim 3, characterized in that: The second base (50) is fixed on the feeding drive device (52), and the feeding drive device (52) adopts a linear motor module, or is composed of a servo motor and a KK module, a screw module or a synchronous belt module.

5. The leaf spring automatic assembly device according to claim 1, characterized in that: The pre-alignment module (6) further includes a first push block (63), the pre-alignment rod (61) is mounted on the first push block (63), and the pre-alignment spring (62) elastically abuts against the first push block (63) to apply an elastic force to the first push block (63) in the direction of the base positioning module (4); the pre-alignment rod pushing mechanism includes a pre-alignment pushing cylinder (64) and a second push block (65), the second push block (65) is fixedly connected to the first push block (63) and is arranged relative to the cylinder axis of the pre-alignment pushing cylinder (64).

6. The leaf spring automatic assembly device according to claim 5, characterized in that: The pre-alignment rod reset mechanism includes a reset cylinder (66) and a reset push block (67), wherein the reset push block (67) is fixedly connected to the reset cylinder (66) and is located on one side of the second push block (65), and the reset cylinder (66) is used to drive the reset push block (67) to push the second push block (65) to move in a direction away from the base positioning module (4), thereby driving the first push block (63) and the pre-alignment rod (61) to reset.

7. The leaf spring automatic assembly device according to claim 5, characterized in that: A first pressure sensor (68) is installed between the pre-alignment rod (61) and the first push block (63), and the first pressure sensor (68) is used to detect the force applied by the pre-alignment spring (62) to the pre-alignment rod (61). The controller of the leaf spring automatic assembly device determines the state of the pre-alignment rod (61) entering the first axial hole of the leaf spring (1) and the second axial hole of the base (2) based on the force detected by the first pressure sensor (68).

8. The leaf spring automatic assembly device according to claim 1, characterized in that: The pressing mechanism comprises a fourth cylinder (79) fixed on the fourth push block (74) and a third rotating pressing block (710) rotatably mounted on the fourth push block (74); a hinged joint (791) is mounted on the cylinder shaft of the fourth cylinder (79); and the hinged joint (791) is rotatably connected to the third rotating pressing block (710) via a third connecting rod (792).

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