Hydraulic pull-riveting device with anti-leakage structure

Abstract

The utility model belongs to the field of pull riveting, specifically relates to a hydraulic pull riveting device with anti -leak structure, including the casing, the lower part of casing is installed handle, the bottom of handle is installed base, hydraulic valve action, pump into the cavity of the front part of the partition ring through pull riveting oil circuit pipe with hydraulic oil, and the hydraulic oil pushes the partition ring to move backward to overcome the pulling force of spring piece, drives the piston rod to retract backward, thereby executes pull riving action, the balance column synchronous backward removal while moving backward, and the traction disc is pushed to move backward along the guide rod, is let out in the space of the front part of tail cavity, actively increases the effective volume of tail cavity, compensates the space vacancy produced because of the piston rod backward removal, thereby maintains the pressure stability of tail cavity, avoids the generation of negative pressure, through the same reset action, balances the pressure difference of front and back cavity, makes the pressure in the cavity always keep dynamic balance, effectively solves the leakage problem.

Description

Technical Field

[0001] This utility model relates to the field of riveting, specifically to a hydraulic riveting device with a leak-proof structure. Background Technology

[0002] Hydraulic riveting is a technology that uses hydraulic power to achieve riveting connections. A hydraulic device provides tensile force, causing plastic deformation of the riveted parts at specific locations, thereby clamping the base material and completing the connection. Hydraulic riveting machines use hydraulic cylinders to generate tension, which is applied to the rivet or riveted parts, causing plastic deformation in a pre-formed groove or specific area to form a stress-free inlay point, achieving a reliable connection. Since the piston movement during the riveting process is achieved solely by hydraulic oil, under high-frequency use, hydraulic oil will leak from the front and rear ends of the piston movement chamber, causing pressure imbalance in the hydraulic oil chamber and affecting the normal use of the riveting device. Utility Model Content

[0003] (a) Purpose of the utility model To address the technical problems existing in the background art, this utility model proposes a hydraulic riveting device with a leak-proof structure, which has a built-in balancing mechanism to assist the piston rod in moving and balancing the pressure of the hydraulic oil chamber, effectively preventing hydraulic oil leakage.

[0004] (II) Technical Solution To solve the above-mentioned technical problems, this utility model provides a hydraulic riveting device with a leak-proof structure, including a housing, a handle installed at the lower part of the housing, and a base installed at the bottom of the handle; The balancing mechanism includes a hydraulic oil chamber opened in the upper part of the housing, a partition ring for separating the hydraulic oil chamber, and a through piston rod installed in the middle. A protruding balance column is installed at the end of the piston rod, and a traction disc located in the tail cavity is sleeved on the outside of the balance column. Several guide rods are installed on the traction disc. The piston rod has several slots that mate with the guide rod, and a spring is installed on the end wall of the separator ring facing the hydraulic oil chamber. The hydraulic mechanism includes a hydraulic valve installed in the handle, and the hydraulic valve is equipped with a rivet oil passage pipe and a reset oil passage pipe that penetrate the partition cavity of the partition ring; The front end of the housing is formed with a riveted end seat that mates with the piston rod.

[0005] Preferably, both the riveting oil line and the reset oil line are bidirectional lines, controlled by the hydraulic valve for the input and output of hydraulic oil.

[0006] Preferably, the spring is a deformable component, and the spring is in a stretched state during the riveting process.

[0007] Preferably, the traction disc has a through structure, and hydraulic oil flows along the opening of the traction disc.

[0008] Preferably, the sealing mechanism includes a first sealing ring and a second sealing ring installed at the front and rear through holes of the hydraulic oil chamber, wherein the inner diameter of the first sealing ring and the second sealing ring is the same as the outer diameter of the piston rod.

[0009] Preferably, the sealing mechanism further includes a third sealing ring installed in the tail cavity, and a section of the piston rod extending into the tail cavity is attached to the third sealing ring.

[0010] The above-mentioned technical solution of this utility model has the following beneficial technical effects: The hydraulic valve actuates to pump hydraulic oil into the cavity in front of the separator ring through the riveting oil circuit pipe. The hydraulic oil pushes the separator ring to move backward against the tension of the spring, causing the piston rod to retract backward, thereby performing the riveting action. At the same time as moving backward, the balance column moves backward synchronously, and the traction plate is pushed backward along the guide rod and enters the slot of the piston rod, freeing up the space in front of the tail cavity, actively increasing the effective volume of the tail cavity, compensating for the space gap caused by the backward movement of the piston rod, thereby maintaining the pressure stability of the tail cavity and avoiding the generation of negative pressure. Through the same reset action, the pressure difference between the front and rear cavities is balanced, so that the pressure in the cavity always maintains dynamic balance, effectively solving the leakage problem. Attached Figure Description

[0011] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is a schematic diagram of the balancing mechanism structure of this utility model; Figure 3 This is a schematic diagram of the external structure of this utility model.

[0012] Figure label: 11. Housing; 12. Handle; 13. Base; 21. Separator ring; 22. Piston rod; 23. Balance column; 24. Traction disc; 25. Guide rod; 26. Spring component; 31. First sealing ring; 32. Second sealing ring; 33. Third sealing ring; 41. Hydraulic valve; 42. Riveting oil pipe; 43. Reset oil pipe; 5. Riveting end seat. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0014] like Figure 1-3As shown, the present invention proposes a hydraulic riveting device with a leak-proof structure, including a housing 11, a handle 12 installed at the lower part of the housing 11, and a base 13 installed at the bottom of the handle 12. The balancing mechanism includes a hydraulic oil chamber opened in the upper part of the housing 11, a partition ring 21 for separating the hydraulic oil chamber, and a through piston rod 22 installed in the middle. A protruding balance column 23 is installed at the end of the piston rod 22. A traction disc 24 located in the tail cavity is sleeved on the outside of the balance column 23. Several guide rods 25 are installed on the traction disc 24. The piston rod 22 has several slots that mate with the guide rod 25, and the partition ring 21 has a spring 26 installed on the end wall facing the hydraulic oil chamber. The hydraulic mechanism includes a hydraulic valve 41 installed in the handle 12, and a rivet oil pipe 42 and a reset oil pipe 43 that penetrate the partition chamber of the partition ring 21 are installed on the hydraulic valve 41. The front end of the housing 11 is formed with a riveted end seat 5 that mates with the piston rod 22.

[0015] It should be noted that both the riveting oil line 42 and the reset oil line 43 are bidirectional lines, controlled by the hydraulic valve 41 for the input and output of hydraulic oil. During the riveting process, hydraulic oil is input into the front part of the hydraulic oil chamber separated by the partition ring 21, and conversely, after the riveting is completed, hydraulic oil is input into the rear part of the hydraulic oil chamber separated by the partition ring 21. The bidirectional line design allows for the recovery of hydraulic oil.

[0016] In this embodiment, the hydraulic valve 41 is activated, pumping hydraulic oil into the cavity in front of the separator ring 21 through the riveting oil pipe 42. The hydraulic oil pushes the separator ring 21 to move backward against the tension of the spring 26. Since the piston rod 22 is fixedly connected to the separator ring 21, the backward movement of the separator ring 21 drives the piston rod 22 to retract backward, thereby performing the riveting action. At the same time as the separator ring 21 and the piston rod 22 move backward, the fixedly connected balance column 23 also moves backward synchronously. The traction disc 24 is pushed backward along the guide rod 25 and enters the slot of the piston rod 22, freeing up the space in front of the tail cavity, actively increasing the effective volume of the tail cavity, compensating for the space gap caused by the backward movement of the piston rod 22, thereby maintaining the pressure stability of the tail cavity and avoiding the generation of negative pressure. After riveting is completed, hydraulic valve 41 switches the oil circuit and pumps hydraulic oil into the cavity behind the separator ring 21 through reset oil circuit pipe 43. At this time, the stretched spring 26 resets, pulling the separator ring 21 and piston rod 22 forward to reset quickly. The balancing mechanism compensates for the change in hydraulic oil cavity volume caused by the movement of piston rod 22 through the reciprocating motion of traction disc 24, so that the pressure in the cavity always maintains dynamic balance, effectively solving the leakage problem.

[0017] It is understandable that the spring component 26 is a deformable component. During the riveting process, the spring component 26 is in a stretched state. During the reset process, the spring component 26 generates a tensile force to assist the separation ring 21 in resetting.

[0018] To ensure the normal transmission of hydraulic oil between the partition ring 21 and the tail cavity, the traction disc 24 is further designed as a through structure, allowing hydraulic oil to flow along the opening of the traction disc 24.

[0019] To further seal the end of the hydraulic oil chamber, the sealing mechanism includes a first sealing ring 31 and a second sealing ring 32 installed at the front and rear through holes of the hydraulic oil chamber. The inner diameter of the first sealing ring 31 and the second sealing ring 32 is the same as the outer diameter of the piston rod 22.

[0020] To further seal the tail cavity, the sealing mechanism also includes a third sealing ring 33 installed in the tail cavity, with a section of the piston rod 22 extending into the tail cavity and attached to the third sealing ring 33.

[0021] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A hydraulic riveting device with a leak-proof structure, characterized in that, Includes a housing (11), a handle (12) is mounted on the lower part of the housing (11), and a base (13) is mounted on the bottom of the handle (12). The balancing mechanism includes a hydraulic oil chamber opened in the upper part of the housing (11), a partition ring (21) for separating the hydraulic oil chamber, and a through piston rod (22) installed in the middle. A protruding balance column (23) is installed at the end of the piston rod (22), and a traction disc (24) located in the tail cavity is sleeved on the outside of the balance column (23). Several guide rods (25) are installed on the traction disc (24). The piston rod (22) has several slots that cooperate with the guide rod (25), and the separator ring (21) has a spring (26) installed on the end wall facing the hydraulic oil chamber. The hydraulic mechanism includes a hydraulic valve (41) installed in the handle (12), and the hydraulic valve (41) is equipped with a rivet oil pipe (42) and a reset oil pipe (43) that penetrate the partition cavity of the partition ring (21). The front end of the housing (11) is formed with a riveted end seat (5) that mates with the piston rod (22).

2. The hydraulic riveting device with a leak-proof structure according to claim 1, characterized in that, Both the rivet oil line (42) and the reset oil line (43) are bidirectional pipelines, controlled by the hydraulic valve (41) for the input and discharge of hydraulic oil.

3. The hydraulic riveting device with a leak-proof structure according to claim 1, characterized in that, The spring component (26) is a deformable component, and the spring component (26) is in a stretched state during the riveting process.

4. A hydraulic riveting device with a leak-proof structure according to claim 1, characterized in that, The traction disc (24) has a through structure, and hydraulic oil flows along the opening of the traction disc (24).

5. A hydraulic riveting device with a leak-proof structure according to claim 1, characterized in that, The sealing mechanism includes a first sealing ring (31) and a second sealing ring (32) installed at the front and rear through holes of the hydraulic oil chamber. The inner diameters of the first sealing ring (31) and the second sealing ring (32) are the same as the outer diameter of the piston rod (22).

6. A hydraulic riveting device with a leak-proof structure according to claim 1, characterized in that, The sealing mechanism also includes a third sealing ring (33) installed in the tail cavity, and a section of the piston rod (22) extending into the tail cavity is attached to the third sealing ring (33).

Images