Nut screwing mechanism of hand wheel assembling machine

Abstract

The utility model provides a nut screwing mechanism of a hand wheel assembling machine, and relates to the technical field of hand wheel nut installation, the nut screwing mechanism comprises a fixing frame, the inner bottom edge of the fixing frame is respectively provided with a vibration frame used for placing a nut and a gear ring, the top edge of the fixing frame is embedded and slidably connected with a sliding block, the top edge of the sliding block is fixedly connected with an electric push rod in a penetrating mode, and the electric push rod is fixedly connected with a nut. The nuts can be connected in series through the inserting rod, the nuts connected in series on the inserting rod can be located at the opening of the lifting cylinder through the inserting cylinder and the connecting rope, and the nuts connected in series and reaching the opening of the lifting cylinder can sequentially enter the lifting cylinder through alternate use of the mounting rings installed at the upper position and the lower position in the lifting cylinder. According to the scheme, automatic placement of the nuts can be achieved, and efficiency can be improved conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of handwheel nut installation, in particular to a nut screwing mechanism of a handwheel assembly machine. Background Technique

[0002] A handwheel is a common mechanical component, mainly used for manually operating equipment to rotate or adjust. It is usually installed on various mechanical equipment, such as valves, machine tools, cranes, elevators and other equipment that requires manual control. A handwheel usually consists of a wheel disc (which can be circular, square or other shapes) and a shaft. During actual assembly, in order to improve assembly efficiency, mechanical means are usually used to replace manual labor for the selection and installation of handwheel nuts.

[0003] For example, a nut screwing mechanism with a publication number of: CN207344479U. When in use, first fix the base to a suitable position, drive the servo connecting shaft through the rotation of the servo motor, and then drive the first parallel mechanism base plate to drive six nut holders to rotate by a suitable angle. Through the expansion and contraction of ten first hydraulic cylinders, the six nut holders are positioned outside the nut to be screwed. Next, the six third hydraulic cylinders extend to drive the six nut holders to clamp the nut. Next, the stepping motor rotates to drive the gear, and then drives the nut dropping channel to rotate to drive the six nut holders to rotate to screw off the nut. Next, the six third hydraulic cylinders contract to make the nut fall into the nut dropping channel through the round hole. The second hydraulic cylinder contracts to drive the second hydraulic cylinder top plate to drive the nut clip to move outward to make the nut fall out.

[0004] However, during use, it is necessary to manually place the nuts into the equipment one by one, which is not conducive to realizing automation. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems existing in the prior art, and to propose a nut screwing mechanism of a handwheel assembly machine.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A nut screwing mechanism of a handwheel assembly machine includes a fixed frame. Vibration frames for placing nuts and a toothed ring are respectively installed on the inner bottom edge of the fixed frame. A slider is embedded and slidably connected to the top edge of the fixed frame. An electric push rod penetrates and is fixedly connected to the top edge of the slider. The telescopic end of the electric push rod on the slider is fixedly connected to a lifting plate. A plurality of inserting rods distributed in a circular array and used for sleeving nuts are fixedly connected to the bottom surface of the lifting plate. A vertical plate is fixedly connected to the bottom edge of the toothed ring on the fixed frame. An inserting cylinder for inserting the bottom of the inserting rod is clamped on one side of the vertical plate. A connecting rope is connected to the bottom end of the inserting cylinder. A lifting cylinder is sleeved at the bottom end of the connecting rope. A toothed ring is also rotatably connected to the bottom edge of the inner wall of the lifting cylinder, and a hexagon socket is fixedly connected to the inner wall of the toothed ring in the lifting cylinder.

[0007] Preferably, two pulley wheels driven by a belt strip are rotatably connected to both sides of the top edge of the fixing frame. The slider is installed on the belt strip, and a shrapnel is embedded and installed at the bottom edge position of the surface of the inserting rod.

[0008] Preferably, two symmetrically arranged swing arms are rotatably connected to the inner side of the vertical plate near the upper and lower positions. A clamping block is fixedly connected to one side of the swing arm located at the inserting cylinder, and the other side away from the inserting cylinder is connected to the vertical plate through a spring. A sliding rod inserted into the side of the vertical plate is slidably sleeved on the surface, and a traction rope is connected between two adjacent sliding rods. And an electric push rod for pushing the traction rope is fixedly connected to the side of the vertical plate.

[0009] Preferably, a gear driven by a motor and meshed with the toothed ring is installed on both the fixing frame and the lifting cylinder.

[0010] Preferably, mounting rings are arranged at both the inner barrel mouth and the middle position of the inner wall of the lifting cylinder. An electric push rod is also fixedly connected to the inner wall of the mounting ring, and the telescopic end of the electric push rod in the mounting ring is also fixedly connected to a clamping block.

[0011] Preferably, among the two mounting rings, the mounting ring located at the middle position of the lifting cylinder is slidably arranged, the mounting ring located at the barrel mouth is fixedly arranged, and an electric push rod is also installed between the two mounting rings.

[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0013] 1. In the present utility model, a plurality of nuts can be connected in series by setting the inserting rod, and by using the inserting cylinder and the connecting rope, a plurality of nuts connected in series on the inserting rod can be located at the barrel mouth of the lifting cylinder. By alternately using the mounting rings installed at the upper and lower positions in the lifting cylinder, a plurality of connected nuts reaching the barrel mouth of the lifting cylinder can enter the lifting cylinder in sequence and then enter the internal hexagonal sleeve in sequence. That is, this solution can realize the automatic placement of nuts, which is convenient for improving efficiency.

[0014] 2. In the present utility model, by setting the shrapnel, when the inserting rod is inserted into the vibrating frame, when the nut is put on the inserting rod, the shrapnel can be pushed to rotate into the inserting rod until the nut reaches above the shrapnel on the surface of the inserting rod, and then the shrapnel resets to prevent the nut from falling. Similarly, when the inserting cylinder is inserted into the inserting rod, the inserting cylinder will also force the shrapnel to enter the inserting rod to release the blockage of the nut, ensuring that the nut on the inserting rod can enter the inserting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of a nut tightening mechanism of a handwheel assembly machine proposed by the present utility model;

[0016] Figure 2 is a nut tightening mechanism of a handwheel assembly machine proposed by the present utility model Figure 1Schematic cross-sectional structure diagram;

[0017] Figure 3 is Figure 1 The enlarged view of part A in

[0018] Figure 4 is Figure 2 The enlarged view of part B in

[0019] Figure 5 is Figure 2 The enlarged view of part C in

[0020] Legend: 1. Fixed frame; 2. Pulley; 3. Slide block; 4. Electric push rod; 5. Lifting plate; 6. Vibration frame; 7. Tooth ring; 8. Insertion cylinder; 9. Vertical plate; 10. Lifting cylinder; 11. Connecting rope; 12. Installation ring; 13. Slide bar; 14. Traction rope; 15. Allen socket; 16. Swing arm; 17. Clamping block; 18. Insertion rod; 19. Elastic piece; 20. Gear. Specific implementation mode

[0021] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the limitations of the specific embodiments disclosed in the following specification.

[0023] Such as Figures 1-5As shown in the figure, a nut - screwing mechanism of a handwheel assembly machine includes a fixed frame 1. At the inner bottom edge of the fixed frame 1, a vibrating frame 6 for placing nuts and a toothed ring 7 are respectively installed. The vibrating frame 6 is installed on the fixed frame 1 through springs and vibrates by installing a vibrating motor on its surface. By vibration, the nuts in the frame are always in a moving state. The top edge of the fixed frame 1 is embedded with a sliding - connected slider 3. The top edge of the slider 3 is fixedly connected through an electric push rod 4. And the telescopic end of the electric push rod 4 on the slider 3 is fixedly connected to a lifting plate 5. By moving the slider 3 on the fixed frame 1, the position of the lifting plate 5 is moved. The bottom surface of the lifting plate 5 is fixedly connected with a number of insertion rods 18 distributed in a circular array and used for sleeving nuts. After the lifting plate 5 moves above the vibrating frame 6, the electric push rod 4 on the slider 3 extends to insert a number of insertion rods 18 on the lifting plate 5 into the vibrating frame 6. And under the action of vibration, the nuts in the frame are put on the insertion rods 18. Then, as the lifting plate 5 rises and moves, the number of insertion rods 18 with nuts on their surfaces move above the toothed ring 7 on the other side of the fixed frame 1. The bottom edge of the toothed ring 7 on the fixed frame 1 is fixedly connected with a vertical plate 9. When the lifting plate 5 moves above the toothed ring 7, at this time, the rotation center of the vertical plate 9 is located on the central axis of the lifting plate 5. Therefore, the vertical plate 9 can reach below any insertion rod 18 as the toothed ring 7 rotates. One side of the vertical plate 9 clamps an insertion cylinder 8 for inserting at the bottom of the insertion rod 18. After the lifting plate 5 continuously descends until a certain insertion rod 18 on its surface is inserted into the top end of the insertion cylinder 8, the nuts in series on this insertion rod 18 will slide onto the insertion cylinder 8. The bottom end of the insertion cylinder 8 is connected with a connecting rope 11. At the bottom end of the connecting rope 11, a lifting cylinder 10 is sleeved. The inner bottom edge of the inner wall of the lifting cylinder 10 is also rotatably connected with a toothed ring 7, and an internal hexagonal sleeve 15 is fixedly connected to the inner wall of the toothed ring 7 in the lifting cylinder 10. Both the fixed frame 1 and the lifting cylinder 10 are equipped with gears 20 driven by motors and meshed with the toothed ring 7. By rotating the gear 20, the toothed ring 7 can be rotated. And by rotating the toothed ring 7 on the fixed frame 1, the vertical plate 9 can be rotated for position adjustment. The number of nuts sliding onto the insertion cylinder 8 will reach the position of the lifting cylinder 10 along the connecting rope 11. And the lifting cylinder 10 is installed at the working station of the handwheel assembly machine by installing an electric telescopic rod. After the handwheel in the handwheel assembly machine is aligned, the nut at the bottom end on the connecting rope 11 enters the lifting cylinder 10 and then enters the internal hexagonal sleeve 15 along the lifting cylinder 10. The internal hexagonal sleeve 15 falls on the screw of the handwheel as the lifting cylinder 10 rises and falls. By rotating the toothed ring 7 on the lifting cylinder 10, the internal hexagonal sleeve 15 is rotated, thereby tightening the nut.

[0024] In order to realize the movement of the slider 3 between the insert tube 8 and the vibration frame 6: two pulleys 2 driven by belts are rotatably connected on both sides of the top edge of the fixed frame 1, and the slider 3 is installed on the belt. A spring piece 19 is embedded in the bottom edge of the surface of the plug rod 18. In this scheme, one of the pulleys 2 is driven to rotate by installing a motor, and the belt is rotated under the support of the other pulley 2, so that the slider 3 can be moved on the top edge of the fixed frame 1, so as to realize the position adjustment of the slider 3. The spring piece 19 can push the spring piece 19 to rotate and enter the plug rod 18 when the plug rod 18 is inserted into the vibration frame 6 and the nut is inserted on the plug rod 18. After the nut reaches the top of the spring piece 19 on the surface of the plug rod 18, the spring piece 19 is reset to prevent the nut from falling. Similarly, when the insert tube 8 is inserted into the plug rod 18, the insert tube 8 will also force the spring piece 19 to enter the plug rod 18, thereby removing the obstruction to the nut and ensuring that the nut on the plug rod 18 can enter the insert tube 8.

[0025] In order to achieve the stability of the position of the insert cylinder 8: one side of the vertical plate 9 is embedded with two symmetrically arranged swing arms 16 near the upper and lower positions, the swing arm 16 is located on one side of the insert cylinder 8 and is fixedly connected with a clamping block 17, and the side away from the insert cylinder 8 is connected to the vertical plate 9 through a spring, and the surface is slidably sleeved with a slide bar 13 plugged into the side of the vertical plate 9, a traction rope 14 is connected between two adjacent slide bars 13, and the side of the vertical plate 9 is fixedly connected with an electric push rod 4 for pushing the traction rope 14, such as Figure 2 As shown in the figure, the length of the inserting tube 8 between the upper and lower clamping blocks 17 is equal to the length of the inserting rod 18. Therefore, after the inserting tube 8 is inserted into the bottom edge of the inserting rod 18, the electric push rod 4 at the upper position of the vertical plate 9 is extended to realize the bending of the upper traction rope 14, thereby realizing the two sliding rods 13 connected with the traction rope 14 to approach each other, and the sliding rod 13 is slidably connected with the swing arm 16 by rotating the ring installed on the swing arm 16. Therefore, when the two sliding rods 13 approach each other, the upper swing arm 16 will be driven to rotate to overcome the support of the spring, that is, the two sliding rods at the upper position are realized. The clamping block 17 releases the clamping of the insert tube 8, while the insert tube 8 can still be fixed relative to the vertical plate 9 under the clamping action of the two clamping blocks 17 at the bottom. After the two clamping blocks 17 at the upper position are away from the insert tube 8, the nut on the insert rod 18 can fall on the insert tube 8, and then the electric push rod 4 at the upper position shrinks and resets. Under the reverse push of the spring, the two clamping blocks 17 at the upper position clamp the insert tube 8 again, and the clamping block 17 under the vertical plate 9 is away from the insert tube 8, so that the insert tube 8 can slide down to be connected in series on the connecting rope 11 while the position is fixed.

[0026] ​In order to achieve the sequential descent of the nuts within the lifting cylinder 10: mounting rings 12 are provided at both the inner wall opening and the middle position of the lifting cylinder 10. The inner wall of the mounting ring 12 is also fixedly connected with electric push rods 4, and the telescopic ends of the electric push rods 4 within the mounting ring 12 are also fixedly connected with clamping blocks 17. Among the two mounting rings 12, the mounting ring 12 located at the middle position of the lifting cylinder 10 is slidably arranged, and the mounting ring 12 located at the opening of the cylinder is fixedly arranged. Moreover, an electric push rod 4 is also installed between the two mounting rings 12. By using the telescoping of the electric push rod 4 between the two mounting rings 12, the distance between the two mounting rings 12 can be adjusted to correspond to the thickness of the nut. And the part of the connecting rope 11 located within the lifting cylinder 10 is rigidly arranged to ensure that it is located on the central axis of the lifting cylinder 10 in the clamped state. Additionally, by retracting the electric push rod 4 within the upper mounting ring 12, the clamping of the connecting rope 11 by the clamping block 17 can be released. At this time, the lowermost nut on the connecting rope 11 will enter the lifting cylinder 10. Then, the electric push rod 4 within the upper mounting ring 12 extends again to separate adjacent nuts on the lifting cylinder 10 and re-clamp the rigid connecting rope 11 within the lifting cylinder 10. Then, by retracting the electric push rod 4 within the lower mounting ring 12, the clamping of the connecting rope 11 by the lower clamping block 17 can be released, and thus the nut within the lifting cylinder 10 can enter the internal hexagonal socket 15.

[0027] Working principle: Pour a certain number of nuts into the vibrating frame 6. Under the vibration effect, the nuts are strung on several inserting rods 18. Then, the lifting plate 5 rises and resets, and under the sliding action of the slider 3, it reaches above the toothed ring 7 of the fixed frame 1. The toothed ring 7 on the fixed frame 1 rotates to align the inserting cylinder 8 with one of the inserting rods 18. Then, the lifting plate 5 descends to insert the inserting rod 18 into the top end of the inserting cylinder 8. And when the clamping block 17 above the vertical plate 9 releases the clamping of the inserting cylinder 8, the nuts on the inserting rod 18 enter the inserting cylinder 8. Then, the clamping block 17 above the vertical plate 9 re-clamps the inserting cylinder 8, while the clamping block 17 below opens, enabling the nuts on the inserting cylinder 8 to enter the connecting rope 11. And by alternately using the mounting rings 12 within the lifting cylinder 10, a single nut enters the internal hexagonal socket 15. Finally, by rotating the internal hexagonal socket 15, the nut is tightened.

[0028] The wiring diagrams of the electric push rod 4 and the motor in the present utility model belong to the common knowledge in the art. Their working principles are already well-known technologies, and their models are selected according to actual use. Therefore, the control methods and wiring arrangements of the electric push rod 4 and the motor are not explained in detail.

[0029] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as they do not depart from the technical solution content of the present utility model, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A nut tightening mechanism for a handwheel assembly machine, characterized in that: The invention comprises a fixing frame (1), wherein a vibration frame (6) for placing nuts and a gear ring (7) are respectively installed on the inner bottom edge of the fixing frame (1), a slider (3) is embedded in the top edge of the fixing frame (1) for sliding connection, an electric push rod (4) is fixedly connected through the top edge of the slider (3), and a lifting plate (5) is fixedly connected to the telescopic end of the electric push rod (4) on the slider (3), and a plurality of plug rods (18) distributed in an annular array and used for sleeve nuts are fixedly connected to the bottom surface of the lifting plate (5). ), the bottom edge of the gear ring (7) on the fixed frame (1) is fixedly connected to a vertical plate (9), one side of the vertical plate (9) holds an insertion tube (8) for being inserted into the bottom edge of the insertion rod (18), the bottom end of the insertion tube (8) is connected to a connecting rope (11), the bottom end of the connecting rope (11) is sleeved with a lifting cylinder (10), the bottom edge of the inner wall of the lifting cylinder (10) is also rotatably connected to the gear ring (7), and the inner wall of the gear ring (7) in the lifting cylinder (10) is fixedly connected to a hexagonal socket (15).

2. The nut tightening mechanism of the hand wheel assembly machine according to claim 1, characterized in that: Two pulleys (2) driven by belts are rotatably connected to the top sides of the fixing frame (1), the sliding block (3) is mounted on the belts, and a spring piece (19) is embedded in the bottom edge of the surface of the insertion rod (18).

3. The nut tightening mechanism of the hand wheel assembly machine according to claim 1, characterized in that: One side of the vertical plate (9) is embedded with two symmetrically arranged swing arms (16) for rotation near the upper and lower positions. The swing arm (16) is fixedly connected to a clamping block (17) on one side of the insertion tube (8), and is connected to the vertical plate (9) via a spring on the side away from the insertion tube (8). A sliding rod (13) plugged into the side of the vertical plate (9) is slidably sleeved on the surface. A traction rope (14) is connected between two adjacent sliding rods (13), and an electric push rod (4) for pushing the traction rope (14) is fixedly connected to the side of the vertical plate (9).

4. The nut tightening mechanism of the hand wheel assembly machine according to claim 1, characterized in that: The qualified lifting cylinder (10) of the fixed frame (1) is equipped with a gear (20) driven by a motor and meshingly connected with the gear ring (7).

5. The nut tightening mechanism of the hand wheel assembly machine according to claim 1, characterized in that: The inner wall of the lifting cylinder (10) is provided with a mounting ring (12) at the cylinder mouth and the middle position, the inner wall of the mounting ring (12) is also fixedly connected to an electric push rod (4), and the telescopic end of the electric push rod (4) in the mounting ring (12) is also fixedly connected to a clamping block (17).

6. The nut tightening mechanism of the hand wheel assembly machine according to claim 5, characterized in that: Of the two mounting rings (12), the mounting ring (12) located in the middle of the lifting cylinder (10) is slidably arranged, and the mounting ring (12) located at the cylinder mouth is fixedly arranged, and an electric push rod (4) is also installed between the two mounting rings (12).

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