Quick die changing hydraulic locking fixture device of three-axis hydraulic milling machine

Abstract

The utility model relates to the technical field of milling machine clamp, and disclose a quick die change hydraulic locking fixture device of three -axis hydraulic milling machine, including locking fixture base, the inside of locking fixture base leans on the upper side rotation and is installed with the press block, and the bottom side of press block is provided with clamping assembly, and the junction of press block and locking fixture base is provided with mechanical locking assembly, mechanical locking assembly includes the unlocking screw rod, and the front end of locking fixture base is screwed in the unlocking screw rod, and the outside rotation of unlocking screw rod is connected with the limit ratchet dog, the utility model discloses the mechanical locking assembly of setting, and the rotation of press block can drive locking ratchet wheel rotation through the link axle, and locking ratchet wheel presses the limit ratchet dog and rotates downward around the unlocking screw rod axis, realize the counterclockwise rotation of locking ratchet wheel, owing to the limitation of limit ratchet dog, locking ratchet wheel cannot reverse rotation, and clamping assembly carries out clamping with mould or work piece, avoids the failure of hydraulic system and leads to the mould or work piece that cannot be clamped.

Description

Technical Field

[0001] This utility model relates to the field of milling machine fixture technology, specifically a quick mold change hydraulic locking fixture device for a three-axis hydraulic milling machine. Background Technology

[0002] Three-axis hydraulic milling machines are milling equipment that combines three-axis CNC technology with a hydraulic transmission system. They are characterized by simple structure, low cost, and easy operation. When machining different parts, three-axis hydraulic milling machines require frequent changes of molds or fixtures. Traditional manual mold changing methods (such as bolt tightening) are time-consuming and rely on the operator's skill level, which can easily lead to increased machine downtime. However, the quick mold changing hydraulic locking fixture device uses a hydraulic system to automatically clamp and release the mold. The operator only needs to press a button to complete the mold changing, which can be reduced to within a few minutes.

[0003] An existing patent (publication number: CN206997565U) discloses a quick-change hydraulic clamp, which consists of a hydraulic mold clamp, a lifting rod, a pressure block, and an oil circuit system. An electromagnetic directional valve injects oil into the oil chamber of the hydraulic mold clamp, achieving rapid clamping and loosening of the mold through hydraulic drive, representing a significant improvement over traditional manual locking methods. However, in practical use, the clamp relies entirely on an external hydraulic system for power. If the machine tool's own hydraulic system malfunctions, the clamp will be unable to work and may even remain in an "open" state, affecting production safety. Utility Model Content

[0004] The purpose of this invention is to provide a quick mold-changing hydraulic locking fixture device for a three-axis hydraulic milling machine to solve the technical problem that the above-mentioned fixture cannot temporarily lock when the hydraulic system fails.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A quick mold change hydraulic locking fixture device for a three-axis hydraulic milling machine includes a locking fixture base, a pressure block is rotatably mounted on the upper side inside the locking fixture base, and a clamping component is provided on one side of the bottom of the pressure block. A mechanical locking component is provided at the connection between the pressure block and the locking fixture base. The mechanical locking assembly includes an unlocking screw, which is threadedly connected to the front end of the locking clamp base. A limiting pawl is rotatably connected to the outside of the unlocking screw. A locking ratchet is engaged on the side of the limiting pawl, and a connecting shaft is fixed inside the locking ratchet. The connecting shaft is located at the connection between the pressure block and the locking clamp base.

[0006] As a further improvement of this utility model: the unlocking screw passes through the front end of the locking clamp base and is fixed with an unlocking knob, and the unlocking screw and the limiting pawl are rotatably connected by a bearing.

[0007] As a further improvement of this utility model: limiting components are provided on both the left and right sides of the limiting pawl, and the diameter of the limiting components is larger than the diameter of the unlocking screw.

[0008] As a further improvement of this utility model: a rotating head is fixed to one end of the connecting shaft that passes through the locking clamp base, and an oil cavity is opened inside the locking clamp base.

[0009] As a further improvement of this utility model: a lifting rod is installed inside the oil cavity of the locking clamp base, and a sealing ring is provided at the connection between the lifting rod and the locking clamp base.

[0010] As a further embodiment of this utility model: a T-shaped block is fixed to the bottom of the locking clamp base, and an oil circuit valve block is installed on the side of the locking clamp base by bolts, and an electromagnetic reversing valve is installed on the side of the oil circuit valve block.

[0011] As a further improvement of this utility model: the electromagnetic reversing valve is connected to the oil chamber of the locking clamp base through the oil circuit valve block, and the lifting rod is located below the pressure block.

[0012] As a further improvement of this utility model: the clamping assembly includes a clamping head that penetrates the bottom of the pressure block, and a support plate is fixed inside the pressure block.

[0013] As a further embodiment of this utility model: the clamping head penetrates the interior of the support plate, and connecting springs are provided on both the upper and lower sides of the support plate. The connecting springs are sleeved on the outside of the clamping head, and an anti-disengagement component is fixed on the side of the connecting spring away from the support plate, and the diameter of the anti-disengagement component is larger than the diameter of the clamping head.

[0014] The beneficial effects of this utility model are: 1. This utility model uses a mechanical locking component. The rotation of the pressure block can drive the locking ratchet to rotate through the connecting shaft. The locking ratchet presses the limiting pawl to rotate downward around the unlocking screw axis, realizing the counterclockwise rotation of the locking ratchet. Due to the limitation of the limiting pawl, the locking ratchet cannot rotate in the opposite direction. The clamping component clamps the mold or workpiece, avoiding the inability to clamp the mold or workpiece due to hydraulic system failure. 2. The present invention, through the clamping assembly, allows the clamping head to move towards the workpiece or mold, and the clamping head to move upward. Under the elastic action of the connecting spring, the clamping head can come into contact with the clamping surface of the workpiece or mold. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a bottom view of the structure of this utility model; Figure 3 This is a schematic diagram of the clamping component structure of this utility model; Figure 4 This is a bottom view of the clamping head of this utility model. Figure 5 This is a schematic diagram of the locking ratchet structure of this utility model; In the diagram: 1. Locking clamp base; 2. Pressure block; 3. Mechanical locking assembly; 301. Unlocking knob; 302. Unlocking screw; 303. Locking ratchet; 304. Limiting pawl; 305. Connecting shaft; 306. Limiting component; 4. Clamping assembly; 401. Clamping head; 402. Support plate; 403. Anti-detachment component; 404. Connecting spring; 5. Rotating head; 6. Lifting rod; 7. T-block; 8. Sealing ring; 9. Oil circuit valve block; 10. Solenoid directional valve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0017] like Figures 1 to 5 As shown, a quick mold change hydraulic locking fixture device for a three-axis hydraulic milling machine includes a locking fixture base 1, a pressure block 2 is rotatably mounted on the upper side inside the locking fixture base 1, and a clamping component 4 is provided on one side of the bottom of the pressure block 2. A mechanical locking component 3 is provided at the connection between the pressure block 2 and the locking fixture base 1. The mechanical locking assembly 3 includes an unlocking screw 302, which is threadedly connected to the front end of the locking clamp base 1. The unlocking screw 302 is externally rotatably connected to a limiting pawl 304. A locking ratchet 303 is engaged on the side of the limiting pawl 304. A connecting shaft 305 is fixed inside the locking ratchet 303. The connecting shaft 305 is located at the connection between the pressure block 2 and the locking clamp base 1.

[0018] Furthermore, the unlocking screw 302 passes through the front end of the locking clamp base 1 and is fixed with an unlocking knob 301. The unlocking screw 302 and the limiting pawl 304 are rotatably connected by a bearing. When the pressure block 2 rotates, it can drive the locking ratchet 303 to rotate through the connecting shaft 305. The locking ratchet 303 presses the limiting pawl 304 to rotate downward around the axis of the unlocking screw 302, realizing the counterclockwise rotation of the locking ratchet 303. Due to the restriction of the limiting pawl 304, the locking ratchet 303 cannot rotate in the opposite direction. The clamping assembly 4 clamps the mold or workpiece, avoiding the inability to clamp the mold or workpiece due to the failure of the hydraulic system.

[0019] Furthermore, limiting elements 306 are provided on both the left and right sides of the limiting pawl 304. The diameter of the limiting element 306 is larger than the diameter of the unlocking screw 302. Rotating the unlocking knob 301 can drive the unlocking screw 302 to rotate, causing the limiting pawl 304 to move backward along the axis of the unlocking screw 302. The limiting pawl 304 disengages from the locking ratchet 303, thereby unlocking the locking ratchet 303. Example 2

[0020] In addition to all the technical features included in Embodiment 1, this embodiment also includes: Furthermore, the connecting shaft 305 passes through one end of the locking clamp base 1 and is fixed with a rotating head 5, and the locking clamp base 1 has an oil cavity inside, with an oil inlet hole on the side of the oil cavity.

[0021] Furthermore, a lifting rod 6 is installed inside the oil cavity of the locking clamp base 1. A sealing ring 8 is provided at the connection between the lifting rod 6 and the locking clamp base 1. The sealing ring 8 is used to seal the connection between the lifting rod 6 and the oil cavity. When the oil pressure in the oil cavity increases, it can drive the lifting rod 6 to move upward. The lifting rod 6 pushes the pressure block 2 to rotate. The pressure block 2 drives the limit pawl 304 to rotate counterclockwise through the connecting shaft 305.

[0022] Furthermore, a T-shaped block 7 is fixed to the bottom of the locking clamp base 1, and an oil circuit valve block 9 is installed on the side of the locking clamp base 1 by bolts. An electromagnetic reversing valve 10 is installed on the side of the oil circuit valve block 9. The electromagnetic reversing valve 10 is connected to the oil chamber of the locking clamp base 1 through the oil circuit valve block 9. The lifting rod 6 is located below the pressure block 2. The electromagnetic reversing valve 10 and the oil circuit valve block 9 are existing components, and their working principle will not be described in detail here.

[0023] Furthermore, the clamping assembly 4 includes a clamping head 401 extending through the bottom of the pressure block 2, and a support plate 402 is fixed inside the pressure block 2. The clamping heads 401 are distributed in an array.

[0024] Furthermore, the clamping head 401 extends through the interior of the support plate 402, and connecting springs 404 are provided on both the upper and lower sides of the support plate 402. The connecting springs 404 are sleeved on the outside of the clamping head 401. An anti-detachment component 403 is fixed on the side of the connecting spring 404 away from the support plate 402, and the diameter of the anti-detachment component 403 is larger than the diameter of the clamping head 401. When the workpiece or mold is placed below the clamping head 401, when the lifting rod 6 pushes the pressure block 2 to rotate upward, the other end descends, driving the clamping head 401 to move closer to the workpiece or mold. At this time, the clamping head 401 moves upward first, and at the same time drives a set of connecting springs 404 to squeeze, and another set of connecting springs 404 installed on the same clamping head 401 to stretch. Under the elastic action of the connecting springs 404, the clamping head 401 can contact the clamping surface of the workpiece or mold.

[0025] Working principle: Increased oil pressure in the oil chamber causes the lifting rod 6 to move upward. The lifting rod 6 pushes the pressure block 2 to rotate. The pressure block 2 drives the limiting pawl 304 to rotate counterclockwise via the connecting shaft 305. At this time, the locking ratchet 303 presses the limiting pawl 304 to rotate downward around the axis of the unlocking screw 302. Due to the limitation of the limiting pawl 304, the locking ratchet 303 cannot rotate in the opposite direction until the clamping head 401 clamps the workpiece or mold. Under the action of external force, the clamping head 401 moves upward, and the connecting spring 404 below the support plate 402 squeezes. The connecting spring 404 above the support plate 402 is stretched. Under the elastic action of the connecting spring 404, the clamping head 401 can contact the clamping surface of the workpiece or mold until it is clamped and fixed. The three-axis hydraulic milling machine performs processing operations on the workpiece. When it is necessary to change the mold or remove the workpiece, the unlocking knob 301 can be rotated. The limiting pawl 304 moves backward along the axis of the unlocking screw 302. The limiting pawl 304 disengages from the locking ratchet 303. The oil pressure in the oil chamber drops, the lifting rod 6 descends, and the workpiece or mold is released.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A quick-change hydraulic locking fixture device for a three-axis hydraulic milling machine, comprising: The locking clamp base (1) is characterized in that: a pressure block (2) is rotatably installed on the upper side inside the locking clamp base (1), and a clamping component (4) is provided on one side of the bottom of the pressure block (2), and a mechanical locking component (3) is provided at the connection between the pressure block (2) and the locking clamp base (1). The mechanical locking assembly (3) includes an unlocking screw (302), which is threaded to the front end of the locking clamp base (1). The unlocking screw (302) is externally connected to a limiting pawl (304). The side of the limiting pawl (304) is engaged with a locking ratchet (303), and a connecting shaft (305) is fixed inside the locking ratchet (303). The connecting shaft (305) is located at the connection between the pressure block (2) and the locking clamp base (1).

2. The quick mold changing hydraulic locking fixture device according to claim 1, characterized in that: The unlocking screw (302) passes through the front end of the locking clamp base (1) and is fixed with an unlocking knob (301). The unlocking screw (302) and the limiting pawl (304) are rotatably connected by a bearing.

3. The quick mold changing hydraulic locking fixture device according to claim 2, characterized in that: The limiting pawl (304) is provided with limiting components (306) on both the left and right sides, and the diameter of the limiting component (306) is larger than the diameter of the unlocking screw (302).

4. The quick mold changing hydraulic locking fixture device according to claim 3, characterized in that: The connecting shaft (305) passes through one end of the locking clamp base (1) and is fixed with a rotating head (5), and the locking clamp base (1) has an oil cavity inside.

5. The quick mold changing hydraulic locking fixture device according to claim 1, characterized in that: A lifting rod (6) is installed inside the oil cavity of the locking clamp base (1), and a sealing ring (8) is provided at the connection between the lifting rod (6) and the locking clamp base (1).

6. The quick mold changing hydraulic locking fixture device according to claim 5, characterized in that: The bottom of the locking clamp base (1) is fixed with a T-shaped block (7), and the side of the locking clamp base (1) is bolted with an oil circuit valve block (9), and the side of the oil circuit valve block (9) is equipped with an electromagnetic reversing valve (10).

7. The quick mold changing hydraulic locking fixture device according to claim 6, characterized in that: The electromagnetic reversing valve (10) is connected to the oil chamber of the locking clamp base (1) through the oil circuit valve block (9), and the lifting rod (6) is located below the pressure block (2).

8. The quick mold changing hydraulic locking fixture device according to claim 7, characterized in that: The clamping assembly (4) includes a clamping head (401) extending through the bottom of the pressure block (2), and a support plate (402) is fixed inside the pressure block (2).

9. The quick mold changing hydraulic locking fixture device according to claim 8, characterized in that: The clamping head (401) extends through the interior of the support plate (402), and connecting springs (404) are provided on both the upper and lower sides of the support plate (402). The connecting springs (404) are sleeved on the outside of the clamping head (401). An anti-detachment component (403) is fixed on the side of the connecting spring (404) away from the support plate (402), and the diameter of the anti-detachment component (403) is larger than the diameter of the clamping head (401).

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