Hydraulic self-centering vice

Abstract

The utility model relates to the technical field of automatic production equipment, and discloses a hydraulic self-centering vice which comprises a base, a hydraulic bin is arranged in the base, the upper end of the hydraulic bin is connected with a sealing cover plate, a piston rod is arranged in the hydraulic bin, the lower end of the piston rod is connected with a piston, and the piston is in sliding fit with the inner wall of the hydraulic bin. First notches are formed in two sides of the upper part of the piston rod; according to the self-centering clamping device, high-precision self-centering clamping of parts is achieved through the combination of precise mechanical structure design and the hydraulic transmission principle, and meanwhile the stability and reliability of a hydraulic system are guaranteed through the design of multiple sealing rings; through the ingenious design of the connecting rod piece, linear motion of the piston rod is converted into synchronous opening and closing of the sliding jaw, and the centering clamping precision is remarkably improved; by optimizing the structural design, unnecessary mechanical parts are reduced, the overall size is more compact, and the space requirement of an automatic production line is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of automated production equipment, in particular to a hydraulic self-centering vise. Background Art

[0002] In current automated production processes, especially in the aviation sector, extremely high machining precision is required for parts. Traditional hydraulic self-centering vises primarily clamp parts by driving sliding jaws with a transmission screw. This method suffers from low centering accuracy and bulk, making it difficult to meet the clamping requirements of high-precision parts in machining, assembly, and welding. Therefore, developing a new hydraulic self-centering vise to improve centering accuracy and reduce size has become a pressing technical issue. Utility Model Content

[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a hydraulic self-centering vise, which effectively solves the problems raised in the above background.

[0004] To achieve the above object, the utility model provides the following technical solution: a hydraulic self-centering vise, comprising a base, a hydraulic chamber provided inside the base, a sealing cover plate connected to the upper end of the hydraulic chamber, a piston rod provided inside the hydraulic chamber, a piston connected to the lower end of the piston rod, the piston slidingly engaged with the inner wall of the hydraulic chamber, and a first notch provided on both sides of the upper portion of the piston rod;

[0005] The upper end of the base is connected to the clamp body, and a movable warehouse is opened inside the clamp body. The upper part of the piston rod extends into the movable warehouse. A limit plate is embedded in the middle of the upper end of the movable warehouse. Sliding jaws are provided on both sides of the limit plate. The sliding jaws on both sides are symmetrically slidably arranged on both sides of the upper end of the clamp body. A second slot is opened at the lower end of the two sliding jaws. Pin shafts are symmetrically connected on both sides of the movable warehouse. Connecting rods are symmetrically sleeved on the outside of the two pin shafts. One end of the connecting rod is located in the first slot, and the other end of the connecting rod is located in the second slot.

[0006] Preferably, the outer wall of the base is provided with a first oil inlet and a second oil inlet communicated with the hydraulic compartment, and the first oil inlet and the second oil inlet are both composed of a bottom oil port and a side oil port.

[0007] Preferably, a first sealing ring is nested in the outer wall of the piston, and the first sealing ring is in contact with the hydraulic chamber.

[0008] Preferably, a second sealing ring is embedded in the shaft hole corresponding to the piston rod passing through the sealing cover plate, and the second sealing ring contacts the piston rod. A third sealing ring is embedded in the outer wall of the sealing cover plate, and the third sealing ring contacts the inner wall of the sealing cover plate installation position.

[0009] Preferably, a fourth sealing ring is embedded in the axial hole of the caliper body corresponding to the position where the piston rod passes through, and the fourth sealing ring is in contact with the piston rod.

[0010] Preferably, the pliers body is arranged in an I-shaped structure, and sliders are connected on both sides of the lower ends of the sliding jaws on both sides, and the sliders are located in sliding contact with the side walls of the pliers body.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. This utility model realizes high-precision self-centering clamping of parts through the combination of precise mechanical structure design and hydraulic transmission principle. At the same time, the design of multiple sealing rings ensures the stability and reliability of the hydraulic system.

[0013] 2. The new model converts the linear motion of the piston rod into the synchronous opening and closing of the sliding jaws through the ingenious design of the connecting rod, which significantly improves the accuracy of centering clamping;

[0014] 3. This new model optimizes the structural design and reduces unnecessary mechanical parts, making the overall volume more compact and adapting to the space requirements of the automated production line;

[0015] 4. Modular design facilitates disassembly and repair, reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0017] In the attached figure:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic structural diagram of the pliers body of the utility model;

[0020] Figure 3 It is a top view of the utility model;

[0021] Figure 4 For this utility model Figure 3 Schematic diagram of the structure of AA;

[0022] In the figure: 1. Base; 2. Hydraulic chamber; 3. Sealing cover plate; 4. Piston rod; 5. Piston; 6. First notch; 7. Jaw body; 8. Movable chamber; 9. Limit plate; 10. Sliding jaw; 11. Second notch; 12. Pin; 13. Connecting rod; 14. First oil inlet; 15. Second oil inlet; 16. First sealing ring; 17. Second sealing ring; 18. Third sealing ring; 19. Fourth sealing ring; 20. Slider. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Embodiment 1, by Figures 1-4 The utility model includes a base 1, a hydraulic chamber 2 is provided inside the base 1, a sealing cover plate 3 is connected to the upper end of the hydraulic chamber 2, a piston rod 4 is provided inside the hydraulic chamber 2, a piston 5 is connected to the lower end of the piston rod 4, the piston 5 is slidably matched with the inner wall of the hydraulic chamber 2, and a first notch 6 is opened on both sides of the upper part of the piston rod 4;

[0025] The upper end of the base 1 is connected to the clamp body 7, and a movable warehouse 8 is opened inside the clamp body 7. The upper part of the piston rod 4 extends through the movable warehouse 8. A limit plate 9 is embedded in the middle of the upper end of the movable warehouse 8. Sliding jaws 10 are provided on both sides of the limit plate 9. The sliding jaws 10 on both sides are symmetrically slidably arranged on both sides of the upper end of the clamp body 7. A second slot 11 is opened at the lower end of the two sliding jaws 10. Pins 12 are symmetrically connected to the two sides of the movable warehouse 8. The two pins 12 are symmetrically sleeved with connecting rods 13 on the outside. One end of the connecting rod 13 is located in the first slot 6, and the other end of the connecting rod 13 is located in the second slot 11.

[0026] The outer wall of the base 1 is provided with a first oil inlet 14 and a second oil inlet 15 which are in communication with the hydraulic tank 2. The first oil inlet 14 and the second oil inlet 15 are both composed of a bottom oil port and a side oil port.

[0027] A first sealing ring 16 is embedded in the outer wall of the piston 5. The first sealing ring 16 contacts the hydraulic chamber 2 to ensure that the hydraulic oil does not leak from the gap between the piston 5 and the inner wall of the hydraulic chamber 2.

[0028] A second sealing ring 17 is embedded in the shaft hole of the sealing cover plate 3 corresponding to the penetration point of the piston rod 4. The second sealing ring 17 contacts the piston rod 4 to ensure the sealing of the piston rod 4 at the penetration point. A third sealing ring 18 is embedded in the outer wall of the sealing cover plate 3. The third sealing ring 18 contacts the inner wall of the installation position of the sealing cover plate 3 to prevent the hydraulic oil from leaking from the gap between the sealing cover plate 3 and the base 1.

[0029] A fourth sealing ring 19 is embedded in the axial hole of the caliper body 7 corresponding to the point where the piston rod 4 passes through. The fourth sealing ring 19 contacts the piston rod 4 to ensure the sealing of the piston rod 4 at the point where the piston rod 4 passes through.

[0030] The pliers body 7 is arranged in an I-shaped structure, and the lower ends of the sliding jaws 10 on both sides are connected to sliders 20, which are located in sliding contact with the side walls of the pliers body 7.

[0031] Working principle: When parts need to be clamped, hydraulic oil is injected from the first oil inlet 14 into the hydraulic chamber 2 inside the base 1. The hydraulic oil enters the hydraulic chamber 2 and pushes the piston 5 downward. The downward movement of the piston 5 drives the piston rod 4 to descend synchronously.

[0032] The first notch 6 on the piston rod 4 is connected to one end of the connecting rod 13, so the connecting rod 13 moves downward as the piston rod 4 descends;

[0033] The other end of the connecting rod 13 is inserted into the second notch 11 at the lower end of the sliding jaw 10. Therefore, when the connecting rod 13 moves downward, it pushes the sliding jaw 10 toward the center of the jaw body 7 to achieve a clamping action;

[0034] The jaw body 7 is an I-shaped structure, and the slider 20 at the lower end of the sliding jaw 10 slides on the side wall of the jaw body 7 to ensure stable movement of the sliding jaw 10;

[0035] Since the two sliding jaws 10 are connected to the piston rod 4 via the connecting rod 13, and the design of the connecting rod 13 enables the two sliding jaws 10 to move synchronously, when the piston rod 4 descends, the two sliding jaws 10 will move synchronously with the center of the clamp body 7 as the reference point, thereby achieving self-centering clamping of the parts;

[0036] When it is necessary to loosen the parts, the hydraulic oil in the first oil inlet 14 is closed and the second oil inlet 15 is opened, and the hydraulic oil pushes the piston 5 up;

[0037] The piston rod 4 rises with the piston 5, and drives the sliding jaws 10 to move to both sides of the jaw body 7 through the connecting rod 13 to release the parts;

[0038] On the other hand, the sliding jaws 10 move to both sides of the jaw body 7 to achieve centering of the external support parts;

[0039] In summary, this device achieves high-precision self-centering clamping of parts through the combination of precise mechanical structure design and hydraulic transmission principle. At the same time, the design of multiple sealing rings ensures the stability and reliability of the hydraulic system.

Claims

1. A hydraulic self-centering vise, comprising a base (1), characterized in that: A hydraulic chamber (2) is provided inside the base (1), the upper end of the hydraulic chamber (2) is connected to a sealing cover plate (3), a piston rod (4) is provided inside the hydraulic chamber (2), the lower end of the piston rod (4) is connected to a piston (5), the piston (5) is slidably engaged with the inner wall of the hydraulic chamber (2), and first notches (6) are provided on both sides of the upper portion of the piston rod (4); The upper end of the base (1) is connected to a clamp body (7), a movable chamber (8) is provided inside the clamp body (7), the upper part of the piston rod (4) extends through the movable chamber (8), a limit plate (9) is embedded in the middle of the upper end of the movable chamber (8), and sliding jaws (10) are provided on both sides of the limit plate (9). The sliding jaws (10) on both sides are symmetrically slidably provided on both sides of the upper end of the clamp body (7), and the lower ends of the two sliding jaws (10) are provided with a second notch (11). Pins (12) are symmetrically connected to both sides of the movable chamber (8), and connecting rods (13) are symmetrically sleeved on the outside of the two pins (12). One end of the connecting rod (13) is located in the first notch (6), and the other end of the connecting rod (13) is located in the second notch (11).

2. A hydraulic self-centering vise according to claim 1, characterized in that: The outer wall of the base (1) is provided with a first oil inlet (14) and a second oil inlet (15) which are connected to the hydraulic tank (2); the first oil inlet (14) and the second oil inlet (15) are both composed of a bottom oil port and a side end oil port.

3. The hydraulic self-centering vise according to claim 1, characterized in that: A first sealing ring (16) is nested in the outer wall of the piston (5), and the first sealing ring (16) is in contact with the hydraulic chamber (2).

4. The hydraulic self-centering vise according to claim 1, characterized in that: A second sealing ring (17) is embedded in the shaft hole corresponding to the position where the piston rod (4) passes through the sealing cover plate (3), and the second sealing ring (17) contacts the piston rod (4). A third sealing ring (18) is embedded in the outer wall of the sealing cover plate (3), and the third sealing ring (18) contacts the inner wall of the installation position of the sealing cover plate (3).

5. The hydraulic self-centering vise according to claim 1, characterized in that: A fourth sealing ring (19) is embedded in the axial hole of the caliper body (7) corresponding to the position where the piston rod (4) passes through, and the fourth sealing ring (19) is in contact with the piston rod (4).

6. The hydraulic self-centering vise according to claim 1, characterized in that: The pliers body (7) is arranged in an I-shaped structure, and the lower ends of the sliding jaws (10) on both sides are connected with sliders (20), and the sliders (20) are located in sliding contact with the side walls of the pliers body (7).

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