Riveting device and riveting tool for fixing piston rod limiting ring

Abstract

The utility model discloses a riveting device and a riveting tool for fixing a piston rod limiting ring. The riveting device comprises an adjusting sleeve, a connecting sleeve, a rotating shaft and a bit. When in use, the riveting device is fixed on the electric wrench, and then the piston rod extends into the adjusting sleeve, so that the end part of the piston rod is positioned at the notch of the rotating shaft mounting groove; then an electric wrench is started, the electric wrench transmits torsion to a rotating shaft through a bit, the rotating shaft is driven to rotate, the rotating shaft is meshed with the end of a piston rod, at the moment, the piston rod moves towards the interior of the rotating shaft, and the whole riveting device moves downwards relative to the piston rod, so that the limiting ring is extruded and riveted to a proper position; and compared with a traditional mode that the limiting ring is installed through manual knocking, the labor intensity is lower, and the installation precision and the installation efficiency are higher. In addition, the total length of the riveting device can be adjusted by rotating the adjusting sleeve, so that the riveting device can be suitable for riveting limiting rings with different installation heights, and the universality is good.

Description

Technical Field

[0001] This utility model relates to the field of piston rod manufacturing technology, specifically to a riveting device and riveting fixture for fixing 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] The most common type of locating ring in existing technology is the press-fit type. During installation, a small amount of lubricant is first applied to the inner ring of the locating ring and the piston rod. Then, the locating ring is pushed in axially along the piston rod. When a small gap exists between the locating ring and the limiting step on the piston rod, the pushing of the locating ring is stopped, and the mounting sleeve is pressed in from the end of the piston rod until the inner end face of the mounting sleeve contacts the locating ring. Finally, a worker holds the piston rod with one hand and a hammer with the other, striking the outer end face of the mounting sleeve to push the locating ring until it contacts the limiting step, completing the installation. The final step of this installation method, where a worker uses a hammer to push the locating ring to the designated design position, is inefficient and labor-intensive. Prolonged hammering can be strenuous for the worker, making it easy to misalign the ring, affecting installation accuracy, and potentially causing hand injuries. Furthermore, excessive hammering force can deform the locating ring, affecting product quality. Utility Model Content

[0004] This application provides a riveting device for fixing a piston rod limiting ring, used in conjunction with an electric wrench, to overcome the aforementioned problems in the prior art. The riveting device for fixing a piston rod limiting ring includes an adjusting sleeve, a connecting sleeve, a rotating shaft, and a screwdriver bit. In use, the riveting device is fixed to the electric wrench, and the piston rod is inserted into the adjusting sleeve so that the end of the piston rod is located at the opening of the mounting groove on the rotating shaft. Then, the electric wrench is started, and the torque is transmitted to the rotating shaft through the screwdriver bit, driving the rotating shaft to rotate and engage with the end of the piston rod. At this time, the piston rod moves inward towards the rotating shaft, and the entire riveting device moves downward relative to the piston rod, thereby squeezing the limiting ring and riveting it to the appropriate position. Compared with the traditional method of manually hammering to install the limiting ring, this method has lower labor intensity and higher installation accuracy and efficiency. Furthermore, the total length of the riveting device can be adjusted by rotating the adjusting sleeve, making it suitable for riveting limiting rings at different installation heights, thus offering good versatility. Correspondingly, this application also provides a riveting fixture for fixing a piston rod limiting ring.

[0005] Regarding the riveting device, the technical solution of this application is as follows:

[0006] A riveting device for fixing a piston rod limiting ring includes an adjusting sleeve, a connecting sleeve, a rotating shaft, and a screwdriver bit. One end of the adjusting sleeve has a through hole for the piston rod to pass through, and the other end is threadedly connected to the connecting sleeve. The rotating shaft is located inside the connecting sleeve and can rotate relative to the connecting sleeve. The rotating shaft includes a mounting part and a transmission part. The mounting part has a mounting groove with internal threads on its wall for connecting to the end of the piston rod. The transmission part is connected to the screwdriver bit. During operation, the screwdriver bit is connected to the output shaft of an electric wrench, and the connecting sleeve is inserted into a fixed sleeve on the electric wrench.

[0007] Compared with existing technologies, the riveting device for fixing the piston rod limiting ring of this application has a reasonable structural design, is easy to assemble, and has low manufacturing cost. It includes an adjusting sleeve, a connecting sleeve, a rotating shaft, and a screwdriver bit. In use, the screwdriver bit is connected to the output shaft of an electric wrench, and the connecting sleeve is inserted into the fixed sleeve on the electric wrench. Then, the piston rod is extended into the adjusting sleeve so that the end of the piston rod is located at the groove of the rotating shaft mounting slot. Then, the electric wrench is started, and the electric wrench transmits torque to the rotating shaft through the screwdriver bit, driving the rotating shaft to rotate, so that the rotating shaft engages with the end of the piston rod. At this time, the piston rod will move inward towards the rotating shaft, and the entire riveting device will move downward relative to the piston rod, thereby squeezing the limiting ring and riveting it in the appropriate position. Compared with the traditional method of installing the limiting ring by manually hammering, the labor intensity is lower, and the installation accuracy and efficiency are higher. Furthermore, this application can also adjust the total length of the riveting device by rotating the adjusting sleeve, thus making it applicable to riveting limit rings with different installation heights (the distance between the limit ring and the end of the piston rod will also be different depending on the piston rod specification), and it has good versatility.

[0008] As an optimization, in the aforementioned riveting device for fixing the piston rod limiting ring, the transmission part is connected and fixed to the bit via a connector; the connector has an A connecting groove and a B connecting groove at both ends; the transmission part is inserted into the A connecting groove and fixed to the connector via a cylindrical pin; the bit is inserted into the B connecting groove and has a clearance fit with the connector. This results in a simple structure and convenient assembly; moreover, the rotating shaft and the bit are fixed together via the connector, which helps ensure consistent torque transmission. Furthermore, a guide slope is provided at the opening of the B connecting groove. The guide slope reduces the frictional resistance of the contact surface, making it easier for the bit to slide into the B connecting groove, thereby reducing deformation or damage caused by forced pressing. Furthermore, the bit can be a hexagonal bit. With six contact surfaces between the connector and the hexagonal bit, torque can be applied sufficiently during operation with an electric wrench, ensuring even force distribution on the connector.

[0009] As an optimization, in the aforementioned riveting device for fixing the piston rod limiting ring, a planar bearing is fitted over the transmission part; an annular limiting step is provided on the inner wall of the connecting sleeve, and the planar bearing is located between the annular limiting step and the connecting head. The planar bearing reduces wear between the connecting head and the connecting sleeve; moreover, the annular limiting step and the connecting head limit the planar bearing, ensuring its stability during operation and thus improving the reliability of the riveting device.

[0010] For riveting fixtures, the technical solution of this application is as follows:

[0011] A riveting fixture for fixing a piston rod limiting ring includes an adjusting sleeve, a connecting sleeve, a rotating shaft, a screwdriver bit, and an electric wrench. One end of the adjusting sleeve has a through hole for the piston rod to pass through, and the other end is threadedly connected to the connecting sleeve. The rotating shaft is located inside the connecting sleeve and can rotate relative to it. The rotating shaft includes a mounting part and a transmission part. The mounting part has a mounting groove with internal threads on its wall for connection to the end of the piston rod. The transmission part is connected to the screwdriver bit. The screwdriver bit is connected to the output shaft of the electric wrench. The connecting sleeve is inserted into a fixed sleeve on the electric wrench.

[0012] Compared with the prior art, the riveting fixture for fixing the piston rod limiting ring of this application is used by inserting the piston rod into the adjusting sleeve, with the end of the piston rod located at the groove of the rotating shaft mounting slot; then, the electric wrench is started, and the electric wrench transmits torque to the rotating shaft through the bit, driving the rotating shaft to rotate, so that the rotating shaft engages with the end of the piston rod. At this time, the piston rod will move inward into the rotating shaft, and the entire riveting device will move downward relative to the piston rod, thereby squeezing the limiting ring and riveting it in the appropriate position. This realizes the automated riveting of the piston rod limiting ring, improves the assembly efficiency of the limiting ring, and reduces the labor intensity of the workers.

[0013] As an optimization, in the aforementioned riveting fixture for fixing the piston rod limiting ring, a set of mounting holes is spaced apart on the outer circumferential surface of the connecting sleeve, and correspondingly, a set of elastic clips is spaced apart on the inner wall of the fixing sleeve; the elastic clips engage with the mounting holes. This makes assembly convenient and easy to implement. Furthermore, the portion connecting the connecting sleeve and the adjusting sleeve is cylindrical and has external threads on its outer surface, which mate with the internal threads on the adjusting sleeve; the portion connecting the connecting sleeve and the fixing sleeve is hexagonal prism-shaped and has a set of mounting holes spaced apart on its outer circumferential surface. This results in a simple structure and convenient assembly.

[0014] As an optimization, in the aforementioned riveting fixture for fixing the piston rod limiting ring, the transmission part is connected and fixed to the bit via a connector; the two ends of the connector are respectively provided with a connecting groove A and a connecting groove B; the transmission part is inserted into the connecting groove A and fixed to the connector via a cylindrical pin; the bit is inserted into the connecting groove B and has a clearance fit with the connector. In this case, the structure is simple and assembly is convenient; moreover, the rotating shaft and the bit are fixed together as one unit via the connector, which helps ensure consistent torque transmission.

[0015] Furthermore, the transmission part is fitted with a planar bearing; the inner wall of the connecting sleeve is provided with an annular limiting step, and the planar bearing is located between the annular limiting step and the connector. The planar bearing reduces wear between the connector and the connecting sleeve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the riveting fixture for fixing the piston rod limiting ring in this application;

[0017] Figure 2 This is a cross-sectional view of the riveting device for fixing the piston rod limiting ring in this application;

[0018] Figure 3 This is a schematic diagram of the riveting device for fixing the piston rod limiting ring in this application;

[0019] Figure 4 This is a schematic diagram of the structure of the rotating shaft in the embodiments of this application;

[0020] Figure 5 and Figure 6 This is a schematic diagram of the connector structure in an embodiment of this application.

[0021] The markings in the attached diagram are as follows: 1-Adjusting sleeve, 101-Through hole; 2-Connecting sleeve, 21-Annular limiting step, 201-Mounting hole; 3-Rotating shaft, 31-Mounting part, 32-Transmission part, 301-Mounting groove; 4-Screwdriver bit; 5-Connecting head, 501-Connecting groove A, 502-Connecting groove B, 503-Guide slope; 6-Surface bearing; 7-Electric wrench, 71-Fixed sleeve. Detailed Implementation

[0022] 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.

[0023] Example:

[0024] See Figures 1 to 4 In this embodiment, the riveting fixture for fixing the piston rod limiting ring includes a riveting device and an electric wrench 7. The riveting device includes an adjusting sleeve 1, a connecting sleeve 2, a rotating shaft 3, and a screwdriver bit 4. One end of the adjusting sleeve 1 has a through hole 101 for the piston rod to pass through, and the other end is threadedly connected to the connecting sleeve 2. The rotating shaft 3 is located inside the connecting sleeve 2 and can rotate relative to the connecting sleeve 2. The rotating shaft 3 includes a mounting part 31 and a transmission part 32. The mounting part 31 has a mounting groove 301, and the groove wall of the mounting groove 301 has an internal thread that mates with the external thread of the piston rod end for connecting to the end of the piston rod. The transmission part 32 is connected to the screwdriver bit 4. The screwdriver bit 4 is a hexagonal screwdriver bit and is connected to the output shaft of the electric wrench 7. The connecting sleeve 2 is inserted into the fixing sleeve 71 on the electric wrench 7.

[0025] In use, insert the piston rod into the adjusting sleeve 1, and rotate the adjusting sleeve 1 to a suitable length according to the position of the limiting ring on the piston rod, so that the end of the piston rod is located at the groove of the mounting groove 301 of the rotating shaft 3; then start the electric wrench 7, the electric wrench 7 transmits torque to the rotating shaft 3 through the bit 4, driving the rotating shaft 3 to rotate relative to the connecting sleeve 2, so that the rotating shaft 3 engages with the end of the piston rod. At this time, the piston rod will move into the rotating shaft 3, and the entire riveting device will move downward relative to the piston rod, thereby squeezing the limiting ring (the outer end face of the adjusting sleeve 1 will contact the limiting ring), and riveting it to a suitable position (achieved by controlling the number of rotations of the electric wrench 7; after riveting to the desired position, the electric wrench 7 will automatically rotate back, causing the rotating shaft 3 to exit the end of the piston rod).

[0026] In this embodiment, the portion connecting the connecting sleeve 2 to the adjusting sleeve 1 is cylindrical and has external threads on its outer surface, which mate with the internal threads on the adjusting sleeve 1. The portion connecting the connecting sleeve 2 to the fixed sleeve 71 is hexagonal prism-shaped, and has six evenly spaced mounting holes 201 on its outer circumference. Correspondingly, the inner wall of the fixed sleeve has six contact surfaces, each with an elastic buckle. During assembly, simply press the connecting sleeve 2 into the fixed sleeve 71 so that the elastic buckles engage with the corresponding mounting holes 201 to complete the installation; the operation is very convenient.

[0027] See Figures 4 to 6 In this embodiment, the transmission part 32 is connected and fixed to the bit 4 via the connector 5; the connector 5 has an A connecting groove 501 and a B connecting groove 502 at both ends; the transmission part 32 is inserted into the A connecting groove 501 and fixed to the connector 5 by a cylindrical pin (the transmission part 32 and the connector 5 have two corresponding fixing holes); the bit 4 is inserted into the B connecting groove 502 and is clearance-fitted with the connector 5. Both the mounting part 31 and the transmission part 32 are cylindrical, and the outer diameter of the mounting part 31 is larger than the diameter of the transmission part 32. Furthermore, a guide slope 503 is provided at the opening of the B connecting groove 502. The guide slope 503 reduces the frictional resistance of the contact surface, making it easier for the bit 4 to slide into the B connecting groove 502, thereby reducing deformation or damage caused by forced pressing.

[0028] In this embodiment, a planar bearing 6 is sleeved on the transmission part 32; an annular limiting step 21 is provided on the inner wall of the connecting sleeve 2, and the planar bearing 6 is located between the annular limiting step 21 and the connecting head 5. The planar bearing 6 reduces wear between the connecting head 5 and the connecting sleeve 2, and the annular limiting step 21 and the connecting head 5 limit the planar bearing 6, ensuring its stability during operation and thus improving the reliability of the riveting fixture.

[0029] 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 device for fixing a piston rod stop ring, characterized in that: The device includes an adjusting sleeve (1), a connecting sleeve (2), a rotating shaft (3), and a bit (4). One end of the adjusting sleeve (1) has a through hole (101) for the piston rod to pass through, and the other end is connected to the connecting sleeve (2) by a thread. The rotating shaft (3) is located inside the connecting sleeve (2) and can rotate relative to the connecting sleeve (2). The rotating shaft (3) includes a mounting part (31) and a transmission part (32). The mounting part (31) has a mounting groove (301) and an internal thread on the groove wall for connecting to the end of the piston rod. The transmission part (32) is connected to the bit (4). During operation, the bit (4) is connected to the output shaft of the electric wrench (7), and the connecting sleeve (2) is inserted into the fixed sleeve (71) on the electric wrench (7).

2. The riveting device for fixing the piston rod stop ring according to claim 1, characterized in that: The transmission part (32) is connected and fixed to the bit (4) through the connector (5); the two ends of the connector (5) are respectively provided with A connecting groove (501) and B connecting groove (502); the transmission part (32) is inserted into the A connecting groove (501) and fixed to the connector (5) by a cylindrical pin; the bit (4) is inserted into the B connecting groove (502) and is clearance-fitted with the connector (5).

3. The riveting device for fixing the piston rod stop ring according to claim 2, characterized in that: The transmission part (32) is fitted with a plane bearing (6); the inner wall of the connecting sleeve (2) is provided with an annular limiting step (21), and the plane bearing (6) is located between the annular limiting step (21) and the connector (5).

4. The rivet device for fixing the piston rod stop ring according to claim 2, characterized in that: The B connecting groove (502) is provided with a guide slope (503) at the groove opening.

5. The riveting device for fixing the piston rod stop ring according to any one of claims 1 to 4, characterized in that: The bit (4) is a hexagonal bit.

6. A riveting tool for fixing a piston rod stop ring, characterized in that: The device includes an adjusting sleeve (1), a connecting sleeve (2), a rotating shaft (3), a bit (4), and an electric wrench (7). One end of the adjusting sleeve (1) has a through hole (101) for the piston rod to pass through, and the other end is connected to the connecting sleeve (2) by a thread. The rotating shaft (3) is located inside the connecting sleeve (2) and can rotate relative to the connecting sleeve (2). The rotating shaft (3) includes a mounting part (31) and a transmission part (32). The mounting part (31) has a mounting groove (301) and an internal thread on the groove wall for connecting to the end of the piston rod. The transmission part (32) is connected to the bit (4). The bit (4) is connected to the output shaft of the electric wrench (7). The connecting sleeve (2) is inserted into the fixed sleeve (71) on the electric wrench (7).

7. The riveting tool for fixing the piston rod stop ring according to claim 6, characterized in that: The outer circumferential surface of the connecting sleeve (2) is provided with a set of mounting holes (201) at intervals. Correspondingly, the inner wall of the fixing sleeve (71) is provided with a set of elastic buckles at intervals; the elastic buckles are inserted into the mounting holes (201).

8. The riveting tool for fixing the piston rod stop ring according to claim 7, characterized in that: The part of the connecting sleeve (2) connected to the adjusting sleeve (1) is cylindrical and has an external thread on its outer surface, which mates with the internal thread on the adjusting sleeve (1); the part of the connecting sleeve (2) connected to the fixed sleeve (71) is hexagonal prism and has a set of mounting holes (201) spaced apart on its outer circumference.

9. The riveting tool for fixing the piston rod stop ring according to claim 6, characterized in that: The transmission part (32) is connected and fixed to the bit (4) through the connector (5); the two ends of the connector (5) are respectively provided with A connecting groove (501) and B connecting groove (502); the transmission part (32) is inserted into the A connecting groove (501) and fixed to the connector (5) by a cylindrical pin; the bit (4) is inserted into the B connecting groove (502) and is clearance-fitted with the connector (5).

10. The riveting tool for fixing the piston rod stop ring according to claim 9, characterized in that: The transmission part (32) is fitted with a plane bearing (6); the inner wall of the connecting sleeve (2) is provided with an annular limiting step (21), and the plane bearing (6) is located between the annular limiting step (21) and the connector (5).

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