A method for manufacturing a connecting rod and a tooling thereof

Abstract

A connecting rod manufacturing method and tooling, wherein the joint bearing and the corrugated handle of the multi-layer node are respectively inserted into the preheated rod body, and then placed on the lower tooling of the riveting tooling, and then the upper tooling is pressed down to perform riveting. During the riveting process, cooling gas is used to cool the joint bearing and the multi-layer node at the connection portion with the corrugated handle; after the riveting is completed, the connection portion is further cooled until the temperature is lower than the denaturation temperature of the rubber. The present invention first makes metal and rubber into complete joint bearings and multi-layer nodes, and then rivets them to the rod body to form a connecting rod, and during the riveting process, cooling gas is used to cool the joint bearing and the portion where the multi-layer node is connected to its corrugated handle, thereby avoiding damage to the rubber in the joint bearing and multi-layer node due to excessive temperature. The riveting operation is made the last step in the overall preparation process of the connecting rod, thereby avoiding the quality problems that may be caused by the current method of first riveting and then pressing the ball joint, and improving production efficiency.

Description

Technical Field

[0001] The present invention relates to a method and tooling for manufacturing a connecting rod, and in particular to a method and tooling for manufacturing a connecting rod which is first press-fitted with a ball joint and then hot-riveted to form. Background Art

[0002] Connecting rods, as connecting components, are generally used to transmit traction, braking, and other lateral forces. They also provide positioning for the axle and frame, and reduce vibration and noise. The commonly used manufacturing method for connecting rods with metal structures is to separately machine the ball head and rod body, then connect them using a hot riveting process to form a single unit. The ball joint is then press-fitted into the ball head to form a complete connecting rod structure.

[0003] For example, the invention patents with application number CN201510743366.2, entitled "A Type I Automobile Thrust Rod Body Integral Riveting Fixture and Riveting Method Thereof," and the invention patents with application number CN201910845535.1, entitled "A Hot Riveting Positioning Method and Fixture for Automobile Thrust Rods," both disclose devices for hot riveting a hollow ball head to a rod body. Since the center distance between the two ball joints is a very important dimension for a thrust rod, in the current manufacturing method, after riveting the ball head to the rod body, it is necessary to test whether the center distance between the two ball heads meets the requirements. For products that meet this dimension, the ball joints at both ends are then pressed into the ball head, and then the center distance between the two ball joints is tested again to see if it meets the requirements. This requires two tests, and defective products may be produced in both operations, thereby increasing the production cost of the connecting rod. Summary of the Invention

[0004] In response to the above problems, the present invention proposes a connecting rod manufacturing method and tooling, in which the joint bearings and multi-layer nodes, which are integrated with metal and rubber at both ends, are inserted into the two ends of the rod body and then riveted, which not only improves the manufacturing efficiency but also reduces the defective rate.

[0005] The present invention addresses the aforementioned issues through a connecting rod fabrication method, wherein the spherical bearing and the corrugated handle of the multi-layer node are respectively inserted into a preheated rod body, then placed on the lower tooling of a riveting tool. The upper tooling then presses down to rivet the rod together. During the riveting process, cooling gas is used to cool the connection between the spherical bearing and the multi-layer node and the corrugated handle. After riveting is completed, the connection is further cooled until the temperature falls below the denaturation temperature of the rubber. After cooling, the connecting rod structure is complete, eliminating the need for further processing.

[0006] Furthermore, after riveting is completed, the connecting rod is transferred to a cooling rack, and the connecting portion is embedded in a cooling trough. Cooling water flows through the cooling trough to locally cool the connecting portion. The use of a cooling trough confines the cooling water to the connecting portion, improving cooling efficiency.

[0007] A connecting rod manufacturing tooling includes a riveting tooling, the riveting tooling includes an upper tooling and a lower tooling, the lower tooling includes a lower plate and a lower riveting die with a corrugated structure arranged on the lower plate, a lower limit mechanism for fixing and supporting a joint bearing, and a lower positioning mechanism for fixing and supporting a multi-layer node, the upper tooling includes an upper plate and an upper riveting die with a corrugated structure arranged on the upper plate, an upper limit mechanism for cooperating to limit the joint bearing, and an upper positioning mechanism for cooperating to limit the multi-layer node, wherein the upper riveting die, the upper limit mechanism, and the upper positioning mechanism are respectively connected to the lower riveting die and the lower The limiting mechanism and the lower positioning mechanism cooperate; the lower limiting mechanism and the lower positioning mechanism are both provided with a forward movement mechanism that brings the lower limiting mechanism and the lower positioning mechanism closer to each other, and a backward movement mechanism that moves the lower limiting mechanism and the lower positioning mechanism away from each other; there are two lower riveting dies, both of which are set between the lower limiting mechanism and the lower positioning mechanism. The lower limiting mechanism and the lower positioning mechanism are both provided with a cooling mechanism on the side close to the lower riveting die. The cooling mechanism is provided with a connected gas outlet and a gas inlet, and when the connecting rod is placed on the riveting fixture, the gas outlet is aligned with the connecting part of the connecting rod. By arranging the gas outlets aligned with the connecting part on the lower limiting mechanism and the lower positioning mechanism, during the riveting process, gas can be blown out of the connecting part to cool it down, preventing the joint bearing and the multi-layer node from being overheated and damaging the rubber.

[0008] Furthermore, the forward movement mechanism includes a fixed block fixed to the lower plate, the fixed block having an adjustment hole. A spring is provided at one end of the adjustment hole near the lower limit mechanism or the lower positioning mechanism, and a forward movement bolt is provided at the other end. When the forward movement bolt rotates forward in the adjustment hole, it pushes the spring and drives the lower limit mechanism or the lower positioning mechanism toward each other. This allows for fine adjustment of the distance between the lower limit mechanism or the lower positioning mechanism.

[0009] Furthermore, the backward movement mechanism includes a push plate fixed to the lower plate, and a backward movement bolt provided on and threadedly connected to the lower limit mechanism or the lower positioning mechanism, wherein the push plate is located on a side close to the lower limit mechanism or the lower positioning mechanism, and the backward movement bolt is located on a side away from the lower limit mechanism or the lower positioning mechanism. When the backward movement bolt rotates forward on the lower limit mechanism or the lower positioning mechanism, its end abuts the push plate, reversely pushing the lower limit mechanism or the lower positioning mechanism away from each other. Similarly, fine adjustment of the distance between the lower limit mechanism or the lower positioning mechanism can be achieved.

[0010] Furthermore, a limiting nut is provided on the rearward bolt. After the position is adjusted, the limiting nut is screwed to a position where it fits with the lower limiting mechanism or the lower positioning mechanism to limit the position of the rearward bolt.

[0011] Furthermore, the lower limit mechanism or the lower positioning mechanism is connected to the lower plate by a guide rail, and the lower limit mechanism or the lower positioning mechanism can move on the lower plate under the action of an external force, thereby adjusting the distance between the lower limit mechanism and the lower positioning mechanism.

[0012] Furthermore, the lower limit mechanism includes a limit frame, and a joint hole for limiting and supporting the spherical bearing is provided at the upper portion of the limit frame. When riveting, the joint of the spherical bearing is inserted into the joint hole for positioning, ensuring the accuracy of the position during the riveting process.

[0013] Furthermore, a spring and a lower support tube with an inner hole are installed in the joint hole. One end of the spring contacts the bottom of the joint hole, and the other end contacts the bottom of the lower support tube. The core shaft of the spherical plain bearing is inserted into the inner hole of the lower support tube. The spring supports the spherical plain bearing to offset the deformation caused by the downward pressure of the upper riveting die during the riveting process.

[0014] Furthermore, the lower positioning mechanism includes a positioning frame, and two node holes are provided on the upper portion of the positioning frame. The two ends of the core shaft of the multi-layer node are respectively placed into a node hole to position the multi-layer node.

[0015] Furthermore, a spring hole is provided at the bottom of the node hole, with one end of the spring extending into the spring hole and the other end extending beyond the spring hole. The two ends of the core shaft of the multi-layer node are pressed on a spring respectively. The spring offsets the deformation caused by the downward pressure of the upper riveting die during the riveting process.

[0016] Furthermore, the lower tooling further comprises a lower top plate arranged on the lower plate, the lower top plate being located between the two lower riveting dies, and supporting the rod body through the lower top plate.

[0017] Furthermore, the upper tooling further comprises an upper top plate arranged on the upper plate, the upper top plate being matched with the lower top plate and clamping the rod body with the lower top plate for positioning.

[0018] Furthermore, both the upper limit mechanism and the upper positioning mechanism include positioning plates, and positioning holes are provided on the lower surface of the positioning plates. The positions of the joint bearings or multi-layer nodes are defined by the cooperation of the positioning holes with the joint holes or node holes.

[0019] Furthermore, both the upper limit mechanism and the upper positioning mechanism include a connecting plate fixed to the upper plate. The positioning plate and the connecting plate are connected by guide posts. The positioning plate passes through the guide posts and can slide on the guide posts. The outer periphery of the guide posts located between the connecting plate and the positioning plate is covered with a spring. The spring offsets the impact force generated by sudden vibration during riveting.

[0020] The beneficial effects of the present invention are:

[0021] 1. This invention first fabricates a complete spherical bearing and multi-layer joint from metal and rubber, then rivets them together with the rod body to form a connecting rod. During the riveting process, cooling gas is used to cool the joint where the spherical bearing and multi-layer joint connect to their corrugated handle, preventing damage to the rubber within the spherical bearing and multi-layer joint from overheating. By making the riveting operation the final step in the connecting rod production process, this avoids the quality issues that can arise from the current practice of riveting first and then press-fitting the ball joint, thereby improving the efficiency of connecting rod production.

[0022] 2. The present invention uses the rotation of the bolt to push the lower limit mechanism and the lower positioning mechanism closer to or away from each other, which has a simple structure, low cost and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the connecting rod structure of Example 1;

[0024] Figure 2 This is a schematic structural diagram of a spherical bearing according to the first embodiment;

[0025] Figure 3 This is a schematic diagram of a multi-layer node structure in accordance with the first embodiment;

[0026] Figure 4 This is a schematic diagram of the riveting tool structure in accordance with the first embodiment;

[0027] Figure 5 This is a schematic diagram of the connecting rod and lower tooling structure of Example 1;

[0028] Figure 6 The following is a schematic diagram of the tooling structure of an embodiment;

[0029] Figure 7 This is a schematic diagram of the structure of the limiting mechanism of the embodiment;

[0030] Figure 8 This is a cross-sectional schematic diagram of the first embodiment after the spherical bearing is placed in the lower limit mechanism;

[0031] Figure 9 for Figure 8 Schematic diagram after removing some structures;

[0032] Figure 10 The following is a schematic diagram of the support structure of an embodiment;

[0033] Figure 11 The following is a schematic diagram of the positioning mechanism structure of the embodiment;

[0034] Figure 12 for Figure 11 Schematic diagram from another angle;

[0035] Figure 13 This is a cross-sectional schematic diagram of the backward movement mechanism of Example 1;

[0036] Figure 14 This is a cross-sectional schematic diagram of the forward movement mechanism of Example 1;

[0037] Figure 15 This is a schematic diagram of the tooling structure of Example 1;

[0038] Figure 16 Schematic diagram of the upper limit mechanism and the upper positioning mechanism of Example 1;

[0039] Figure 17 This is a schematic diagram of cooling the connecting rod on a cooling rack in Example 1;

[0040] Figure 18 for Figure 17 Schematic diagram after removing some structures;

[0041] Figure 19 This is a schematic diagram of the riveting tool structure of Example 2;

[0042] Figure 20 This is a schematic diagram of the connecting rod and lower tooling structure of Example 2;

[0043] Figure 21 This is a schematic diagram of the tooling structure of Example 2;

[0044] In the figure: 100. Connecting rod, 110. Spherical bearing, 120. Multi-layer node, 130. Rod body, 101. Corrugated handle, 102. Connecting part, 103. Mandrel, 200. Upper tooling, 300. Lower tooling, 1. Lower plate, 11. Lower riveting die, 12. Lower limiting mechanism, 121. Joint hole, 122. Lower bracket, 123. Guide groove, 124. Retaining ring, 125. Guide block, 126. Inner hole, 127. Limiting frame, 13. Lower positioning mechanism, 131. Node hole, 132. Spring hole, 133. Positioning frame, 134. Upper convex plate, 14. Lower top plate, 15. Backing plate, 16. Forward movement mechanism, 161. Fixed block, 162. Forward movement bolt, 163. Adjustment hole, 17. Rearward movement mechanism, 171. Push plate, 172. Rearward movement bolt, 173. Limit nut, 18. Guide rail, 2. Upper plate, 21. Upper riveting die, 22. Upper limit mechanism, 23. Upper positioning mechanism, 24. Upper top plate, 25. Connecting plate, 26. Positioning plate, 261. Positioning hole, 27. Guide column, 3. Spring, 4. Cooling mechanism, 41. Gas outlet, 42. Gas inlet, 5. Cooling rack, 51. Water tank, 52. Cold water pipe, 53. Cooling tank, 54. Upper cover, 55. Lower cover. DETAILED DESCRIPTION

[0045] The present invention is further described below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components in the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the products. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the accompanying drawings. Example 1

[0046] A connecting rod manufacturing tool, such as Figure 1-Figure 3 As shown, the connecting rod 100 of this embodiment includes a spherical bearing 110, a multi-layer node 120, and a rod body 130. Both the spherical bearing 110 and the multi-layer node 120 are equipped with a corrugated handle 101. During manufacturing, the corrugated handles 101 of the spherical bearing 110 and the multi-layer node 120 are respectively placed into the ends of the rod body 130 and riveted together. For the connecting rod 100, the distance between the two core shafts 103 is its critical dimension.

[0047] like Figure 4 As shown, the manufacturing tooling of the connecting rod 100 includes a riveting tooling, and the riveting tooling includes an upper tooling 200 and a lower tooling 300. When riveting, as shown in FIG. Figure 5 As shown, the rod body 100 , the spherical bearing 110 and the multi-layer node 120 are placed on the lower tooling 300 , and the upper tooling 200 is pressed downward to rivet the rod body 100 , the spherical bearing 110 and the multi-layer node 120 into a whole.

[0048] like Figure 5 and Figure 6 As shown, the lower tooling 300 includes a lower plate 1, on which a lower limiting mechanism 12, a lower positioning mechanism 13 and a lower riveting die 11 are provided, wherein two lower riveting dies 11 are provided, both located between the lower limiting mechanism 12 and the lower positioning mechanism 13, and the lower limiting mechanism 12 and the lower positioning mechanism 13 are located at both ends. During riveting, the lower limiting mechanism 12 is used to position the joint bearing 110, and the lower positioning mechanism 13 is used to position the multi-layer node 120. The two lower riveting dies 11 respectively support the two corrugated handles 101 and the rod body 130. The ends of the lower limiting mechanism 12 and the lower positioning mechanism 13 away from each other are each provided with a forward moving mechanism 16, which pushes the lower limiting mechanism 12 and the lower positioning mechanism 13 closer to each other to reduce the distance between the joint bearing 110 and the core shaft 103 of the multi-layer node 120. A backward movement mechanism 17 is provided on both sides of the lower limit mechanism 12 and the lower positioning mechanism 13 to push the lower limit mechanism 12 and the lower positioning mechanism 13 away from each other to increase the distance between the joint bearing 110 and the core shaft 103 of the multi-layer node 120.

[0049] like Figure 6-Figure 7 、 Figure 11-12As shown, a pad 15 is provided on the lower plate 1, the lower limiting mechanism 12 and its forward moving mechanism 16 and backward moving mechanism 17 on one side are arranged on one pad 15, and the lower positioning mechanism 13 and its forward moving mechanism 16 and backward moving mechanism 17 on one side are arranged on another pad 15. Figure 7 and Figure 12 As shown, the lower limit mechanism 12 and the lower positioning mechanism 13 are connected to the pad 15 where they are located through a guide rail 18 so that they can move forward or backward under the push of the forward movement mechanism 16 or the backward movement mechanism 17.

[0050] like Figure 7-Figure 9 As shown, the lower limit mechanism 12 includes a limit frame 127 and a lower support cylinder 122. The bottom of the limit frame 127 is connected to the guide rail 18 between the pad 15. The top of the limit frame 127 is provided with a joint hole 121. The lower support cylinder 122 is provided in the joint hole 121. The lower support cylinder 122 is provided in the inner hole 126. When riveting, the joint bearing 110 is placed in the inner hole 126 for limiting. Figure 8 and Figure 9 As shown, a spring 3 is further provided in the joint hole 121, and the bottom end of the spring 3 is placed at the bottom of the joint hole 121, as shown in FIG. Figure 10 As shown, the lower bracket 122 is also provided with a retaining ring 124. The upper end of the spring 3 contacts the retaining ring 124 to support the lower bracket 122 and the spherical bearing 110. During the riveting process, when the spherical bearing 110 is subjected to downward pressure, the spring 3 can act as a buffer. In addition, the inner wall of the joint hole 121 is provided with a guide groove 123, and the outer wall of the lower bracket 122 is provided with a guide block 125. When the guide block 125 is inserted into the guide groove 123, it prevents the lower bracket 122 from rotating during the riveting process.

[0051] like Figure 11-12 As shown, the lower positioning mechanism 13 includes a positioning frame 133, the lower end surface of the positioning frame 133 is set on the base plate 15 through the guide rail 18, and two upper convex plates 134 are provided on the upper end surface. The two upper convex plates 134 are provided with L-shaped node holes 131 on the side and top surfaces facing each other. When riveting, the two ends of the core shaft 103 of the multi-layer node 120 are respectively placed in a node hole 131 for positioning. The node hole 131 is also provided with a spring hole 132. After one end of the spring 3 is placed in the spring hole 132, the core shaft 103 is pressed on the other end of the spring 3, and the spring 3 provides a buffer.

[0052] like Figure 7-Figure 9 、 Figure 11-14As shown, the forward movement mechanism 16 includes a fixed block 161 fixed to the backing plate 15 (of course, the fixed block 161 can also be directly fixed to the lower plate 1). The fixed block 161 has an adjustment hole 163 along the length of the lower plate 1. The adjustment hole 163 has a forward movement bolt 162 at one end and a spring 3 at the other end. One end of the spring 3 supports the limit frame 127 or the positioning frame 133. When the forward movement bolt 162 is tightened, it can push the spring 3, thereby pushing the limit frame 127 or the positioning frame 133 closer to each other. When the forward movement bolt 162 is loosened, the pushing force on the spring 3 disappears, allowing the limit frame 127 or the positioning frame 133 to move away from each other under the action of external force. The rearward movement mechanism 17 includes a push plate 171 fixed to the backing plate 15 and a rearward movement bolt 172 disposed on the limiting frame 127 or the positioning frame 133 and capable of being screwed on the limiting frame 127 or the positioning frame 133 to move closer to or away from the push plate 171. The rearward movement bolt 172 is located between the push plate 171 and the fixed block 161. When the rearward movement bolt 172 is tightened, the rearward movement bolt 172 approaches the push plate 171. When the rearward movement bolt 172 ends and contacts the push plate 171 and is tightened further, the rearward movement bolt 172 pushes the limiting frame 127 or the positioning frame 133 in reverse, causing them to move away from each other. A limiting nut 173 is also provided at the end of the rearward moving bolt 172 located outside the limiting frame 127 or the positioning frame 133 away from the push plate 171. When the rearward moving bolt 172 is screwed to a suitable position, the limiting nut 173 is screwed to a position in contact with the limiting frame 127 or the positioning frame 133 to fix the position of the rearward moving bolt 172.

[0053] like Figure 7 、 Figure 11-12 As shown, the lower limit mechanism 12 and the lower positioning mechanism 13 are both provided with a cooling mechanism 4. Figure 7 As shown, the cooling mechanism 4 at the lower limit mechanism 12 is fixed as an independent component at the edge of the limit frame 127. The gas outlet 41 of the cooling mechanism 4 faces upward and is aligned with the connection part 102 of the spherical plain bearing 110. The cooling gas enters from the gas inlet 42 and flows out from the gas outlet 41 to cool the connection part 102, thereby preventing the high temperature of the rod body 130 from being excessively transferred to the rubber and causing rubber denaturation. Figure 11-12 As shown, the cooling mechanism 4 at the lower fixing mechanism 13 is an integrated structure with the positioning frame 133 , that is, its gas outlet 41 and gas inlet 42 are directly arranged on the positioning frame 133 , and the gas outlet 41 is also facing upward, aligned with the connection part 102 of the multi-layer node 120 .

[0054] like Figure 15As shown, the upper tooling 200 includes an upper plate 2 and an upper riveting die 21, an upper limit mechanism 22, and an upper positioning mechanism 23 arranged on the upper plate 2. Correspondingly, two upper riveting dies 21 are also provided, located between the upper limit mechanism 22 and the upper positioning mechanism 23. The upper riveting die 21, the upper limit mechanism 22, and the upper positioning mechanism 23 correspond to the lower riveting die 11, the lower limit mechanism 12, and the lower positioning mechanism 13 in the vertical direction, respectively, to fix and position the joint bearing 110, the multi-layer node 120, and the rod body 130 from the upper and lower directions.

[0055] During the riveting process, the length between the two core shafts 103 of the connecting rod 100 is mainly adjusted by the lower limit mechanism 12 and the lower positioning mechanism 13, while the upper limit mechanism 22 and the upper positioning mechanism 23 only press the joint bearing 110 and the multi-layer node 120 to prevent them from moving. Therefore, in this embodiment, Figure 16 As shown, the upper limit mechanism 22 and the upper positioning mechanism 23 adopt the same structure, including a connecting plate 25 and a positioning plate 26. The connecting plate 25 is used to fix the upper limit mechanism 22 or the upper positioning mechanism 23 to the upper plate 2. The positioning plate 26 is connected to the connecting plate 25 through a guide column 27. The guide column 27 is located between the positioning plate 26 and the connecting plate 25 and is sleeved with a spring 3. The positioning plate 26 can move up and down along the guide column 27. A positioning hole 261 is also provided on the lower surface of the positioning plate 26. The joint bearing 110 or the multi-layer node 120 is pressed through the positioning hole 261. During the riveting process, the spring 3 can play a buffering role.

[0056] This production tooling also includes cooling tooling after riveting, such as Figure 17 and Figure 18 As shown (only the cooling structure at one end is shown in the figure), the cooling tooling includes a cooling rack 5, a cooling trough 53 surrounded by an upper cover 54 and a lower cover 55 is provided above the cooling rack 5, and a water storage tank 51 for receiving water is provided below. The cooling rack 5 is provided with a cold water pipe 52 connected to the cooling trough 53, and an arc-shaped recess is provided on both the upper cover 54 and the lower cover 55. The connecting part 102 is stuck in the arc-shaped recess. The cold water pipe 52 passes through the upper cover 54 to spray the cooling water to the connecting part 102, and then the cooling water flows into the water storage tank 51 along the cooling trough 53.

[0057] This embodiment also relates to a method for manufacturing a connecting rod 100. After the joint bearing 110, multi-layer node 120, and rod body 130 are processed separately, the two ends of the rod body 130 are heated. The corrugated handles 101 of the joint bearing 110 and the multi-layer node 120 are respectively inserted into the two ends of the rod body 130 and placed together on the lower tooling 300. The joint bearing 110 is placed into the lower limit mechanism 12, and the multi-layer node 120 is placed into the lower positioning mechanism 13. The distance between the two core shafts 103 is adjusted by the forward movement mechanism 16 and the backward movement mechanism 17. The upper tooling 200 is pressed down, and the joint bearing 110, multi-layer node 120, and rod body 130 are riveted together into a whole. At the same time, cooling gas flows out from the gas outlet 41 to cool the connecting portion 102. After the riveting is completed, the distance between the two core shafts 103 is detected to determine whether the size of the connecting rod 100 meets the requirements. Example 2

[0058] In this embodiment, Figures 19-21 As shown, the lower tooling 300 further includes a lower top plate 14 disposed between two lower riveting dies 11 on the lower plate 1, and the upper tooling 200 further includes an upper top plate 24 disposed between two upper riveting dies 21 on the upper plate 2. Therefore, in this embodiment, the connecting rod 100 is manufactured using a two-step riveting process. First, the spherical bearing 110 or multi-layer node 120 is placed separately with the rod body 130 on the lower tooling 300. The spherical bearing 110 or multi-layer node 120 is placed into the spherical hole 121 or the node hole 131. One end of the rod body 130, along with the spherical bearing 110 or multi-layer node 120, is then placed onto a lower riveting die 11. The other end of the rod body 130 is then placed onto the lower top plate 14, completing the riveting of one end. The other end of the rod body 130 is then riveted.

[0059] The above embodiments are only for the purpose of illustrating the present invention, and are not intended to limit the present invention. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of protection of the present invention, and the scope of protection of the present invention should be defined by the claims.

Claims

1. A connecting rod manufacturing tool, comprising a riveting tool, the riveting tool comprising an upper tool (200) and a lower tool (300), the lower tool (300) comprising a lower plate (1) and a lower riveting die (11) with a corrugated structure arranged on the lower plate (1), a lower limit mechanism (12) for fixing and supporting a joint bearing (110), and a lower positioning mechanism (13) for fixing and supporting a multi-layer node (120), the upper tool (200) comprising an upper plate (2) and an upper riveting die (21) with a corrugated structure arranged on the upper plate (2), an upper limit mechanism (22) for cooperating to limit the joint bearing (110), and an upper positioning mechanism (23) for cooperating to limit the multi-layer node (120), wherein the upper riveting die (21), the upper limit mechanism (22), and the upper positioning mechanism (23) respectively cooperate with the lower riveting die (11), the lower limit mechanism (12), and the lower positioning mechanism (13); characterized in that: The lower limit mechanism (12) and the lower positioning mechanism (13) are both provided with a forward movement mechanism (16) for bringing the lower limit mechanism (12) and the lower positioning mechanism (13) closer to each other, and a backward movement mechanism (17) for moving the lower limit mechanism (12) and the lower positioning mechanism (13) away from each other; the lower riveting die (11) is provided with two, both of which are arranged between the lower limit mechanism (12) and the lower positioning mechanism (13); the lower limit mechanism (12) and the lower positioning mechanism (13) are both provided with a cooling mechanism (4) on the side close to the lower riveting die (11); the cooling mechanism (4) is provided with a gas outlet (41) and a gas inlet (42) that are connected, and when the connecting rod (100) is placed on the riveting fixture, the gas outlet (41) is aligned with the connecting portion (102) of the connecting rod (100); The forward movement mechanism (16) includes a fixed block (161) fixed to the lower plate (1), the fixed block (161) is provided with an adjustment hole (163), a spring (3) is provided at one end of the adjustment hole (163) close to the lower limit mechanism (12) or the lower positioning mechanism (13), and a forward movement bolt (162) is provided at the other end, and when the forward movement bolt (162) rotates forward in the adjustment hole (163), it pushes the spring (3) to drive the lower limit mechanism (12) or the lower positioning mechanism (13) to move closer to each other; The rearward movement mechanism (17) comprises a push plate (171) fixed to the lower plate (1), and a rearward movement bolt (172) arranged on the lower limit mechanism (12) or the lower positioning mechanism (13) and threadedly connected to the lower limit mechanism (12) or the lower positioning mechanism (13), wherein the push plate (171) is located on a side close to the lower limit mechanism (12) or the lower positioning mechanism (13), and the rearward movement bolt (172) is located on a side away from the lower limit mechanism (12) or the lower positioning mechanism (13). When the rearward movement bolt (172) rotates forward on the lower limit mechanism (12) or the lower positioning mechanism (13), its end abuts the push plate (171), and pushes the lower limit mechanism (12) or the lower positioning mechanism (13) in reverse, so that the lower limit mechanism (12) or the lower positioning mechanism (13) are moved away from each other.

2. The connecting rod manufacturing tool according to claim 1, characterized in that: A limiting nut (173) is also provided on the rearward moving bolt (172).

3. The connecting rod manufacturing tool according to claim 1, characterized in that: The lower limit mechanism (12) or the lower positioning mechanism (13) is connected to the lower plate (1) via a guide rail (18), and the lower limit mechanism (12) or the lower positioning mechanism (13) can move on the lower plate (1) under the action of an external force.

4. The connecting rod manufacturing tool according to claim 1, characterized in that: The lower limiting mechanism (12) includes a limiting frame (127), and a joint hole (121) for limiting and supporting the joint bearing (110) is provided at the upper portion of the limiting frame (127); A spring (3) and a lower support cylinder (122) with an inner hole (126) are also provided in the joint hole (121). One end of the spring (3) contacts the bottom of the joint hole (121), and the other end contacts the lower part of the lower support cylinder (122). The core shaft (103) of the joint bearing (110) is sleeved in the inner hole (126) of the lower support cylinder (122).

5. The connecting rod manufacturing tool according to claim 1, characterized in that: The lower positioning mechanism (13) includes a positioning frame (133), and two node holes (131) are provided above the positioning frame (133). The two ends of the core shaft (103) of the multi-layer node (120) are respectively placed in one of the node holes (131) to position the multi-layer node (120); A spring hole (132) is provided at the bottom end of the node hole (131), one end of the spring (3) extends into the spring hole (132), and the other end extends beyond the spring hole (132), and both ends of the core shaft (103) of the multi-layer node (120) are pressed on a spring (3).

6. The connecting rod manufacturing tool according to claim 1, characterized in that: The lower tooling (300) further includes a lower top plate (14) arranged on the lower plate (1), and the lower top plate (14) is located between the two lower riveting dies (11); The upper tooling (200) further comprises an upper top plate (24) arranged on the upper plate (2), and the upper top plate (24) cooperates with the lower top plate (14).

7. The connecting rod manufacturing tool according to claim 1, characterized in that: The upper limit mechanism (22) and the upper positioning mechanism (23) both include a positioning plate (26), and a positioning hole (261) is provided on the lower surface of the positioning plate (26); The upper limit mechanism (22) and the upper positioning mechanism (23) both include a connecting plate (25) fixed to the upper plate (2), the positioning plate (26) and the connecting plate (25) are connected via a guide post (27), the positioning plate (26) passes through the guide post (27) and can slide on the guide post (27), and the guide post (27) is located between the connecting plate (25) and the positioning plate (26) and is provided with a spring (3) on its outer periphery.

8. A method for manufacturing a connecting rod using the tooling according to claim 1, characterized in that: After the spherical bearing (110) and the corrugated handle (101) of the multi-layer node (120) are respectively inserted into the preheated rod body (130), they are placed on the lower tooling (300) of the riveting tooling, and then the upper tooling (200) is pressed down for riveting. During the riveting process, cooling gas is used to cool the connection part (102) of the spherical bearing (110) and the multi-layer node (120) with the corrugated handle (101); after the riveting is completed, the connection part (102) is further cooled until the temperature is lower than the denaturation temperature of the rubber.

9. The method for manufacturing a connecting rod according to claim 8, wherein: After riveting is completed, the connecting rod (100) is transferred as a whole to the cooling rack (5), and the connecting portion (102) is embedded in the cooling groove (53). Cooling water flows through the cooling groove (53) to locally cool the connecting portion (102).

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