Rapid ratchet wheel switching device for nut machine

Abstract

The utility model discloses a ratchet wheel rapid switching device for a nut machine, which is characterized in that the switching device comprises a supporting frame (1), a main supporting shaft (2) is arranged at the top end of the supporting frame (1), a connecting shaft (3) is movably connected in the main supporting shaft (2), the connecting shaft (3) can axially move in the supporting shaft (2), an annular limiting groove (4) is arranged on the connecting shaft (3), and the annular limiting groove (4) is connected with the main supporting shaft (2). Limiting bolts (5) distributed in the radial direction are connected to the main supporting shaft (2) in an inserted mode, the bottom ends of the limiting bolts (5) can make contact with the side wall of the annular limiting groove (4), the end of the connecting shaft (3) is fixedly connected with a positioning disc (6), a petal-shaped protrusion (7) is arranged at one end of the positioning disc (6), and the other end of the positioning disc (6) is connected with an operation handle (8). The end face of the main supporting shaft (2) is provided with petal-shaped grooves matched with the petal-shaped protrusions (7).

Description

Technical Field

[0001] The utility model relates to the field of fastener processing, in particular to a ratchet quick switching device for a nut machine. Background Art

[0002] When processing and preparing nuts, a pair of V-shaped wheels are required to realize the wire pulling operation. Since this pulling action is a step-by-step action, the active wheel in the pair of V-shaped wheels is driven by a ratchet and pawl mechanism, and the ratchet is repeatedly pushed by the pawl to realize the rotation of the active V-shaped wheel.

[0003] When one wire is used up and replaced with the next one, the mold will inevitably be worn during the processing of the previous wire. Therefore, when the next wire enters the nut machine under the action of the V-wheel, there will be a certain deviation when using the ratchet with the same number of teeth, which will lead to errors in the final finished product materials and affect the quality of the nuts in the same batch.

[0004] Therefore, every time the wire is replaced, a ratchet with a different number of teeth needs to be replaced (generally speaking, the number of teeth of the replaced ratchet differs by 1 from the previous ratchet). However, the process of replacing the ratchet that drives the V-wheel to rotate is relatively complicated and requires a lot of manpower and time, which seriously affects production efficiency.

[0005] Therefore, a method or device that can solve the above problems is needed. Summary of the Invention

[0006] The utility model aims to solve the above-mentioned deficiencies in the prior art and provides a device which has a simple structure, an ingenious design, a reasonable layout and can quickly and conveniently replace the ratchet in a nut machine.

[0007] The technical solution of the utility model is: a ratchet quick switching device for a nut machine, characterized in that: the switching device includes a support frame 1, a main support shaft 2 is provided at the top of the support frame 1, a connecting shaft 3 is movably connected in the main support shaft 2, the connecting shaft 3 can move axially in the support shaft 2, an annular limit groove 4 is provided on the connecting shaft 3, a limit pin 5 distributed in the radial direction is plugged into the main support shaft 2, and the bottom end of the limit pin 5 can contact the side wall of the annular limit groove 4,

[0008] The end of the connecting shaft 3 is fixedly connected to the positioning plate 6. One end of the positioning plate 6 is provided with a petal-shaped protrusion 7, and the other end is connected to the operating handle 8. The end surface of the main support shaft 2 is provided with a petal-shaped groove that matches the petal-shaped protrusion 7.

[0009] On the outer wall of the positioning plate 6, there are n support rods 9 distributed at equal angles, where n is a natural number greater than 2. The ends of the support rods 9 are rotatably supported on a ratchet shaft 10, and a ratchet 11 is connected to the ratchet shaft 10.

[0010] The end of the ratchet shaft 10 is provided with a flat pin 12, and the flat pin 12 matches with the flat pin groove 14 opened at the end of the driving wheel shaft 13. The other end of the driving wheel shaft 13 is connected to the driving wheel 15, and the driven wheel 16 is matched with the driving wheel 15.

[0011] The ratchet 11 connected to the driving wheel shaft 13 is in the driving position, and a pawl mechanism is provided to match the driving position. The pawl mechanism includes an eccentric block 18 rotatably supported by a rotating shaft 17. A pawl 19 is hinged on the top of the eccentric block 18, and a roller 20 is provided at the bottom. A pawl driving cam 21 is provided to match the roller 20.

[0012] The petal-shaped protrusion 7 is composed of three convex strips distributed at equal angles.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] This type of ratchet quick-switching device for a nut-twisting machine boasts a simple structure, ingenious design, and rational layout. It addresses the challenges of ratchet replacement in conventional nut-twisting machines by employing a unique design. It utilizes a positioning plate with n support rods to drive n ratchets. Once the target ratchet rotates to the connection position, it drives the ratchet to connect with the active wheel shaft. This significantly simplifies the ratchet replacement process, reduces the workload, effectively improves work efficiency, and saves labor. Furthermore, its simple manufacturing process and low manufacturing cost make it particularly suitable for widespread application in this field, and its market prospects are promising. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 It is a structural schematic diagram of the ratchet and pawl mechanism in an embodiment of the present utility model.

[0017] Figure 3 It is a structural schematic diagram of multiple support rods and ratchet parts in an embodiment of the present utility model.

[0018] Figure 4 The figure shows a three-dimensional structural diagram of the main support shaft and the connecting shaft part in the embodiment of the present utility model. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention will be described below with reference to the accompanying drawings. Figures 1 to 4 As shown: A ratchet quick switching device for a nut machine, which includes a support frame 1, a main support shaft 2 is provided at the top of the support frame 1, a connecting shaft 3 is movably connected in the main support shaft 2, and the connecting shaft 3 can move axially in the main support shaft 2, an annular limit groove 4 is provided on the connecting shaft 3, and a radially distributed limit pin 5 is inserted on the main support shaft 2, and the bottom end of the limit pin 5 can contact the side wall of the annular limit groove 4.

[0020] The end of the connecting shaft 3 is fixedly connected to the positioning plate 6. One end of the positioning plate 6 is provided with a petal-shaped protrusion 7, and the other end is connected to the operating handle 8. The end surface of the main support shaft 2 is provided with a petal-shaped groove that matches the petal-shaped protrusion 7.

[0021] On the outer wall of the positioning plate 6, there are n support rods 9 distributed at equal angles, where n is a natural number greater than 2. The ends of the support rods 9 are rotatably supported on a ratchet shaft 10, and a ratchet 11 is connected to the ratchet shaft 10.

[0022] The end of the ratchet shaft 10 is provided with a flat pin 12, and the flat pin 12 matches with the flat pin groove 14 opened at the end of the driving wheel shaft 13. The other end of the driving wheel shaft 13 is connected to the driving wheel 15, and the driven wheel 16 is matched with the driving wheel 15.

[0023] The ratchet 11 connected to the driving wheel shaft 13 is in the driving position, and a pawl mechanism is provided to match the driving position. The pawl mechanism includes an eccentric block 18 rotatably supported by a rotating shaft 17. A pawl 19 is hinged on the top of the eccentric block 18, and a roller 20 is provided at the bottom. A pawl driving cam 21 is provided to match the roller 20.

[0024] The petal-shaped protrusion 7 is composed of three convex strips distributed at equal angles.

[0025] The working process of the ratchet quick switching device for a nut cutter according to the embodiment of the utility model is as follows: in the initial state, a ratchet 11 is in the driving position. The flat pin 12 at the end of the ratchet shaft 10 on which the ratchet 11 is located is inserted into the flat pin slot 14 provided on the driving wheel shaft 13. When the driving cam 21 connected to the driving motor rotates, it pushes the eccentric block 18 to swing back and forth about the rotating shaft 17. During the swinging of the eccentric block 18, the pawl 19 pushes the ratchet 11 to rotate step by step, thereby realizing step-by-step torque output.

[0026] When the ratchet 11 rotates, the torque is transmitted to the driving wheel shaft 13 through the flat pin 12. The driving wheel 15 and the driven wheel 16 at the end of the driving wheel shaft 13 are both V-shaped wheels. The wire 22 to be conveyed is clamped between the grooves on their edges. The wire 22 is pulled in a step-by-step manner under the action of the driving wheel 15 and the driven wheel 16 to realize the feeding operation;

[0027] When a wire 22 is exhausted and needs to be replaced with another new wire, in order to compensate for the wear and accumulated deviation generated during the working process of the mold, it is necessary to replace the ratchet 11 with a different number of teeth;

[0028] First, hold the operating handle 8 and pull the handle 8 and the connecting shaft 3 connected to it outward, and the connecting shaft 3 will move axially relative to the main support shaft 2. The travel of the connecting shaft 3 is determined by the limit pin 5. When the connecting shaft 3 moves, the petal-shaped protrusion 7 on the positioning plate 6 disengages from the petal-shaped groove provided on the main support shaft 2, and the positioning plate 6 regains its freedom. At the same time, the ratchet 11 currently in the driving position also moves with the movement of the connecting shaft 3, and the flat pin 12 is pulled out of the flat pin groove 14, and the ratchet shaft 10 is separated from the driving wheel shaft 13.

[0029] After the driving positioning disk 6 rotates 360° / n, the other ratchet 11 moves to the driving position, aligning the flat pin 12 with the flat pin groove 14, and pushing the connecting shaft 3 in the reverse direction, so that the petal-shaped protrusion 7 re-enters the petal-shaped groove, the main support shaft 2 and the positioning disk 6 are reconnected, and the flat pin 12 also re-enters the flat pin groove 14. At this time, the current ratchet 11 is matched with the pawl 19 and can be driven by the pawl to achieve step-by-step torque output.

Claims

1. A ratchet quick-switching device for a nut machine, characterized in that: The switching device comprises a support frame (1), a main support shaft (2) is provided at the top end of the support frame (1), a connecting shaft (3) is movably connected in the main support shaft (2), the connecting shaft (3) can move axially in the main support shaft (2), an annular limiting groove (4) is provided on the connecting shaft (3), a limiting pin (5) distributed in the radial direction is inserted into the main support shaft (2), and the bottom end of the limiting pin (5) can contact the side wall of the annular limiting groove (4). The end of the connecting shaft (3) is fixedly connected to the positioning plate (6), one end of the positioning plate (6) is provided with a petal-shaped protrusion (7), and the other end is connected to the operating handle (8), and the end surface of the main support shaft (2) is provided with a petal-shaped groove that matches the petal-shaped protrusion (7). N support rods (9) are arranged on the outer wall of the positioning plate (6) at equal angles, wherein n is a natural number greater than 2. The ends of the support rods (9) are rotatably supported by a ratchet shaft (10), and a ratchet (11) is connected to the ratchet shaft (10). The end of the ratchet shaft (10) is provided with a flat pin (12), and the flat pin (12) matches with a flat pin groove (14) provided at the end of the driving wheel shaft (13). The other end of the driving wheel shaft (13) is connected to a driving wheel (15), and a driven wheel (16) is provided to match the driving wheel (15). The ratchet (11) connected to the driving wheel shaft (13) is in a driving position, and a pawl mechanism is provided in correspondence with the driving position. The pawl mechanism includes an eccentric block (18) rotatably supported by a rotating shaft (17), a pawl (19) is hingedly connected to the top of the eccentric block (18), and a roller (20) is provided at the bottom. A pawl driving cam (21) is provided in correspondence with the roller (20).

2. The ratchet quick switching device for a nut cutter according to claim 1, characterized in that: The petal-shaped protrusion (7) is composed of three convex strips distributed at equal angles.

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