Riveting tool for fastening limiting ring of piston rod

Abstract

The utility model discloses a riveting tool for fastening a limiting ring of a piston rod. The riveting tool comprises a riveting table and a mounting seat, the mounting seat comprises a mounting plate, a bottom plate and a supporting plate; the bottom plate is fixed on the riveting table; a fixing sleeve is embedded in the mounting plate; the fixing sleeve is used for fixing the piston rod, and a limiting step is arranged on the fixing sleeve and used for limiting the limiting ring; a hydraulic machine is arranged above the mounting seat; a sleeve coaxial with the fixing sleeve is arranged on an output shaft of the hydraulic machine. A riveting head is arranged at the bottom of the sleeve; a riveting bulge is arranged on the bottom surface of the riveting head; the sleeve and the riveting head are both of a hollow structure. During use, the piston rod is installed in the fixing sleeve, then the riveting head is driven by a hydraulic machine to move downwards and press the limiting ring, the surface of the limiting ring is deformed to be fixed to the clamping spring, and therefore the limiting ring is fastened to the piston rod, at the moment, the connecting strength between the limiting ring and the piston rod is high, and the integration degree is good.

Description

Technical Field

[0001] This utility model relates to the field of piston rod manufacturing technology, specifically to a riveting fixture for fastening piston rod limiting rings. Background Technology

[0002] Shock absorbers are an important component of a car's suspension system, primarily used to suppress spring vibrations and convert the energy of bumps during vehicle movement into heat, thereby improving driving stability and comfort. Their core principle involves the reciprocating motion of a piston rod inside the shock absorber, which drives the flow of hydraulic fluid to generate damping force, thus controlling the compression and rebound speed of the spring. To prevent damage to internal components (such as the piston and oil seals) due to over-travel caused by excessive compression or extension of the piston rod, and to ensure that the shock absorber operates within its designed maximum travel range, a limiting ring is typically installed at the end or middle of the piston rod.

[0003] In existing technology, when installing the limiting ring, it is usually first placed on the piston rod, and then the retaining ring is pressed from the end of the piston rod into the retaining ring groove of the piston rod to limit the limiting ring and fix it on the piston rod. However, because the retaining ring needs to withstand a large stress during operation, long-term use may cause fatigue damage, which will affect the limiting function, cause the limiting ring to loosen, and thus affect the use of the piston rod. Utility Model Content

[0004] This invention provides a riveting fixture for fastening piston rod limiting rings, overcoming the aforementioned problems in the prior art. The riveting fixture includes a hydraulic press and a mounting base. The mounting base has a fixed sleeve, and the output shaft of the hydraulic press has a riveting head. In use, the piston rod is installed in the fixed sleeve, and the hydraulic press drives the riveting head downwards, pressing it onto the limiting ring. This causes deformation of the limiting ring surface, fixing it to the retaining spring, thus fastening the limiting ring to the piston rod. At this point, the connection strength between the limiting ring and the piston rod is high, and the integration is excellent. The limiting ring is not easily loosened after prolonged use. Furthermore, this invention uses a hydraulic press to achieve automated riveting of the piston rod limiting ring, resulting in high riveting efficiency and low labor intensity for workers.

[0005] The technical solution of this utility model is as follows:

[0006] A riveting fixture for fastening a piston rod limiting ring includes a riveting table; a mounting base is provided on the riveting table; the mounting base includes a mounting plate, a base plate, and a support plate disposed between the mounting plate and the base plate; the base plate is fixed to the riveting table; a fixing sleeve is embedded in the mounting plate; the fixing sleeve is used to fix the piston rod, and a limiting step is provided on the fixing sleeve to limit the limiting ring; a hydraulic press is provided above the mounting base; a sleeve coaxial with the fixing sleeve is provided on the output shaft of the hydraulic press; a riveting head is provided at the bottom of the sleeve; multiple riveting protrusions are provided on the bottom surface of the riveting head; both the sleeve and the riveting head are hollow structures.

[0007] Compared with the prior art, the riveting fixture for fastening piston rod limiting rings of this utility model includes a hydraulic press and a mounting base on a riveting table, and a fixed sleeve on the mounting base. The output shaft of the hydraulic press is equipped with a riveting head. In use, the piston rod is installed in the fixed sleeve, and then the riveting head is driven downward by the hydraulic press to press on the limiting ring, causing the surface of the limiting ring to deform and be fixed together with the snap ring, thereby fastening the limiting ring to the piston rod. At this time, the connection strength between the limiting ring and the piston rod is high and the integration is good. The limiting ring is not easy to loosen after long-term use. In addition, this application uses a hydraulic press to realize the automated riveting of piston rod limiting rings, which has high riveting efficiency and low labor intensity for workers.

[0008] As an optimization, in the aforementioned riveting fixture for fastening the piston rod limiting ring, the hydraulic press is fixed to the riveting table via a gantry frame; the gantry frame includes a crossbeam and connecting rods on both sides of the crossbeam; the two ends of the connecting rods are fixedly connected to the crossbeam and the worktable, respectively; the hydraulic press is fixed on the crossbeam, and the output shaft of the hydraulic press passes through the crossbeam and is connected to the sleeve. In this configuration, the structure is simple and installation is convenient.

[0009] As an optimization, in the aforementioned riveting fixture for fastening the piston rod limiting ring, the output shaft of the hydraulic press is provided with a connecting plate A, and the top of the sleeve is provided with a connecting plate B. The connecting plates A and B are fixedly connected, fixing the output shaft of the hydraulic press and the sleeve as a whole. The connection between the hydraulic press output shaft and the sleeve is achieved through the connecting plates A and B, which is convenient for assembly and disassembly and has low implementation difficulty. Furthermore, both ends of the connecting plate A are slidably connected to two connecting rods respectively. This improves the stability of the riveting head when it moves downwards and prevents positional displacement when the riveting head presses against the limiting ring.

[0010] Furthermore, the bottom of the B connecting plate is provided with a connecting sleeve, which is fitted over the sleeve and fixed to the sleeve by a pin; the riveting head is inverted T-shaped, including a connecting part and a riveting part; the connecting part is inserted into the sleeve and fixed to the sleeve by a pin, and the riveting protrusion is provided on the riveting part. At this time, the connection structure is simple and easy to assemble.

[0011] As an optimization, in the aforementioned riveting fixture for fastening the piston rod limiting ring, the fixing sleeve, sleeve, and riveting head are each provided with a slot. Therefore, when fastening the piston rod, it is only necessary to insert the piston rod into the slot of the fixing sleeve, sleeve, and riveting head; when removing the piston rod, it is simply pulled outwards to disengage it from the slot. This operation is very convenient and greatly improves the ease of placing and removing the piston rod. Furthermore, on the base plate, below the fixing sleeve, a limiting sleeve coaxial with the fixing sleeve is also provided. Thus, after the upper part of the piston rod is inserted into the slot, the bottom end can be limited by the limiting sleeve, ensuring that the piston rod is concentric after installation, thereby guaranteeing the riveting quality of the limiting ring.

[0012] Furthermore, the fixing sleeve is T-shaped, comprising a transverse mounting portion and a longitudinal snap-fit ​​portion. Correspondingly, the side of the mounting plate has a snap-fit ​​groove, and the top of the snap-fit ​​groove has a fixing groove. The transverse mounting portion is located within the fixing groove and is connected and fixed to the mounting plate by bolts, while the longitudinal snap-fit ​​portion snaps into the snap-fit ​​groove. This design facilitates installation and ensures a high degree of connection between the fixing sleeve and the mounting plate.

[0013] As an optimization, in the aforementioned riveting fixture for fastening the piston rod limiting ring, a support column is further provided between the mounting plate and the base plate; the support column is located between the two support plates. This improves the overall stability of the mounting base structure. Furthermore, a limiting groove is provided on the worktable; a limiting block that mates with the limiting groove is provided at the bottom of the base plate. This ensures the connection stability between the mounting base and the riveting table, improving the reliability of the riveting fixture of this application. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the riveting fixture used to fasten the piston rod limiting ring in an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of the mounting base in the embodiments of this application;

[0016] Figure 3 This is a schematic diagram of the structure of the fixing sleeve in the embodiment of this application;

[0017] Figure 4 This is a schematic diagram of the riveting head in the embodiments of this application;

[0018] Figure 5 This is a schematic diagram of mounting the piston rod onto the riveting fixture in this application;

[0019] Figure 6 yes Figure 5 A schematic diagram of the assembly of the piston rod and the fixed sleeve.

[0020] The markings in the attached diagram are as follows: 1-Riveting table, 101-Limiting groove; 2-Mounting base, 21-Mounting plate, 22-Base plate, 23-Support plate, 24-Support column, 201-Snap-fit ​​groove, 202-Fixing groove; 3-Fixing sleeve, 31-Limiting step, 32-Transverse mounting part, 33-Vertical snap-fit ​​part; 4-Hydraulic press; 5-Sleeve; 6-Riveting head, 61-Riveting protrusion, 62-Connecting part, 63-Riveting part; 7-Crossbeam; 8-Connecting rod; 9-A connecting plate; 10-B connecting plate; 11-Connecting sleeve; 12-Limiting sleeve; 13-Piston rod; 14-Limiting ring; 15-Snap ring. Detailed Implementation

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application.

[0022] Example:

[0023] See Figures 1 to 4 The riveting fixture for fastening the piston rod limiting ring in this embodiment includes a riveting table 1; a mounting base 2 is provided on the riveting table 1; the mounting base 2 includes a mounting plate 21, a base plate 22, and a support plate 23 disposed between the mounting plate 21 and the base plate 22; the base plate 22 is fixed on the riveting table 1; a fixing sleeve 3 is embedded in the mounting plate 21; the fixing sleeve 3 is used to fix the piston rod 13, and a limiting step 31 is provided on the fixing sleeve 3 to limit the limiting ring 14; a hydraulic press 4 is provided above the mounting base 2; a sleeve 5 coaxial with the fixing sleeve 3 is provided on the output shaft of the hydraulic press 4; a riveting head 6 is provided at the bottom of the sleeve 5; multiple riveting protrusions 61 are provided on the bottom surface of the riveting head 6; both the sleeve 5 and the riveting head 6 are hollow structures (therefore, when the riveting head 6 moves down, the end of the piston rod 13 can be inserted into the riveting head 6 and the sleeve 5).

[0024] In this embodiment, the hydraulic press 4 is fixed to the riveting table 1 via a gantry frame. The gantry frame includes a crossbeam 7 and connecting rods 8 on both sides of the crossbeam 7. The two ends of the connecting rods 8 are fixedly connected to the crossbeam 7 and the worktable 1, respectively. The hydraulic press 4 is fixed to the crossbeam 7, and its output shaft passes through the crossbeam 7 and is welded to the A connecting plate 9. The top of the sleeve 5 is provided with a B connecting plate 10. A connecting sleeve 11 is welded to the bottom of the B connecting plate 10. The connecting sleeve 11 is fitted over the sleeve 5 and fixed to the sleeve 5 by a pin. The two ends of the B connecting plate 10 are bolted to the A connecting plate 9, thereby fixing the output shaft of the hydraulic press 4 and the sleeve 5 as one unit. At this time, the structure is simple and the installation is convenient. Furthermore, the two ends of the A connecting plate 9 are slidably connected to the two connecting rods 8, respectively. This can improve the stability of the riveting head 6 when it moves downward and prevent the position from shifting when the riveting head 6 presses against the limiting ring 14.

[0025] In this embodiment, the fixing sleeve 3, sleeve 5, and riveting head 6 are each provided with a slot. Therefore, when installing the piston rod 13, it is only necessary to insert the piston rod 13 into the slot on the fixing sleeve 3, sleeve 5, and riveting head 6; when removing the piston rod 13, it is simply pulled outwards to disengage it from the slot, making the operation very convenient and greatly improving the ease of placing and removing the piston rod 13. Furthermore, on the base plate 22, below the fixing sleeve 3, a limiting sleeve 12 coaxial with the fixing sleeve 3 is also provided. Thus, after the upper part of the piston rod 13 is inserted into the slot, the bottom end can be limited by the limiting sleeve 12, thereby ensuring that the piston rod 13 is concentric after installation, thus guaranteeing the riveting quality of the limiting ring 14. In actual use, different sizes of limiting sleeves 12 are used depending on the size of the piston rod 13.

[0026] In this embodiment, the fixing sleeve 3 is T-shaped, including a transverse mounting part 32 and a longitudinal snap-fit ​​part 33. Correspondingly, the side of the mounting plate 21 is provided with a snap-fit ​​groove 201, and the top of the snap-fit ​​groove 201 is provided with a fixing groove 202. The transverse mounting part 32 is located in the fixing groove 202 and is connected and fixed to the mounting plate 21 by bolts. The longitudinal snap-fit ​​part 33 is snapped into the snap-fit ​​groove 201. The riveting head 6 is inverted T-shaped, including a connecting part 62 and a riveting part 63. The connecting part 62 is inserted into the sleeve 3 and fixed to the sleeve 3 by a pin. The riveting protrusion 61 is provided on the riveting part 63.

[0027] In this embodiment, a support column 24 is also provided between the mounting plate 21 and the base plate 22; the support column 24 is located between the two support plates 23. This improves the overall stability of the mounting base 2. Furthermore, a limiting groove 101 is provided on the workbench 1; a limiting block that mates with the limiting groove 101 is provided at the bottom of the base plate 22.

[0028] Working principle:

[0029] First, the limiting ring 14 is fitted onto the piston rod 13, and then the snap ring 15 is installed into the snap ring groove on the piston rod 13 (the snap ring 15 is located inside the limiting ring 14).

[0030] See Figure 5 and Figure 6 During riveting, the piston rod 13 is inserted into the groove of the fixed sleeve 3, and the position of the piston rod 13 is adjusted so that the limiting ring 14 is located on the limiting step 31 of the fixed sleeve 3. Then, the hydraulic press 4 is started to drive the riveting head 6 to move down. The riveting protrusion 61 on the riveting head 6 causes the surface of the limiting ring 14 to deform and be fixed together with the snap ring 15, thereby fastening the limiting ring 14 to the piston rod 13.

[0031] The foregoing general description of the utility model and its specific embodiments should not be construed as limiting the technical solution of the utility model. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the utility model, to form other technical solutions within the protection scope of this application.

Claims

1. A riveting fixture for fastening a piston rod limiting ring, characterized in that: The system includes a riveting table (1); a mounting base (2) is provided on the riveting table (1); the mounting base (2) includes a mounting plate (21), a base plate (22), and a support plate (23) located between the mounting plate (21) and the base plate (22); the base plate (22) is fixed on the riveting table (1); a fixing sleeve (3) is embedded in the mounting plate (21); the fixing sleeve (3) is used to fix the piston rod (13), and the fixing sleeve (3) is provided with a limiting step (31) for limiting the limiting ring (14); a hydraulic press (4) is provided above the mounting base (2); a sleeve (5) coaxial with the fixing sleeve (3) is provided on the output shaft of the hydraulic press (4); a riveting head (6) is provided at the bottom of the sleeve (5); multiple riveting protrusions (61) are provided on the bottom surface of the riveting head (6); both the sleeve (5) and the riveting head (6) are hollow structures.

2. The riveting fixture for fastening the piston rod limiting ring according to claim 1, characterized in that: The hydraulic press (4) is fixed to the riveting table (1) by a gantry frame; the gantry frame includes a crossbeam (7) and connecting rods (8) on both sides of the crossbeam (7); the two ends of the connecting rods (8) are fixedly connected to the crossbeam (7) and the worktable (1) respectively; the hydraulic press (4) is fixed to the crossbeam (7).

3. The riveting fixture for fastening the piston rod limiting ring according to claim 2, characterized in that: The hydraulic press (4) has an A connecting plate (9) on its output shaft and a B connecting plate (10) on the top of the sleeve (5). The A connecting plate (9) and the B connecting plate (10) are fixedly connected to fix the output shaft of the hydraulic press (4) and the sleeve (5) into one piece. The two ends of the A connecting plate (9) are slidably connected to two connecting rods (8) respectively.

4. The riveting fixture for fastening the piston rod limiting ring according to claim 3, characterized in that: The bottom of the B connecting plate (10) is provided with a connecting sleeve (11), which is sleeved on the outside of the sleeve (5) and fixed to the sleeve (5) by a pin.

5. The riveting fixture for fastening the piston rod limiting ring according to claim 4, characterized in that: The riveting head (6) is inverted T-shaped and includes a connecting part (62) and a riveting part (63); the connecting part (62) is inserted into the sleeve (3) and fixed to the sleeve (3) by a pin, and the riveting protrusion (61) is provided on the riveting part (63).

6. The riveting fixture for fastening the piston rod limiting ring according to claim 1, characterized in that: The fixing sleeve (3), the sleeve (5) and the riveting head (6) are respectively provided with slots.

7. The riveting fixture for fastening the piston rod limiting ring according to claim 6, characterized in that: On the base plate (22), below the fixing sleeve (3), there is also a limiting sleeve (12) coaxial with the fixing sleeve (3).

8. The riveting fixture for fastening the piston rod limiting ring according to claim 1, characterized in that: The fixing sleeve (3) is T-shaped and includes a horizontal mounting part (32) and a longitudinal snap-fit ​​part (33). Correspondingly, the side of the mounting plate (21) is provided with a snap-fit ​​groove (201), and the top of the snap-fit ​​groove (201) is provided with a fixing groove (202). The horizontal mounting part (32) is located in the fixing groove (202) and is connected and fixed to the mounting plate (21) by bolts. The longitudinal snap-fit ​​part (33) is snapped into the snap-fit ​​groove (201).

9. The riveting fixture for fastening the piston rod limiting ring according to claim 1, characterized in that: A support column (24) is also provided between the mounting plate (21) and the base plate (22); the support column (24) is located between the two support plates (23).

10. The riveting fixture for fastening the piston rod limiting ring according to claim 1, characterized in that: The workbench (1) has a limiting groove (101); the bottom of the base plate (22) is provided with a limiting block that is connected to the limiting groove (101).

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