Nut screwing machine

Abstract

The utility model discloses a nut screwing machine which comprises a support, a nut screwing device and a nut screwing device. The nut positioning cylinder is arranged on the support, a vertically-through positioning hole is formed in the center of the nut positioning cylinder, and the inner diameter of the positioning hole of the nut positioning cylinder is equal to or larger than the outer diameter of the nut; one end of the driving friction piece is connected with the power device, the power device can drive the driving friction piece to rotate, the driving friction piece and the nut positioning barrel are coaxially arranged, and the driving face of the driving friction piece is located below the nut positioning barrel; when the nut is arranged in the positioning hole of the nut positioning barrel, the axis of the nut coincides with or is adjacent to the axis of the nut positioning barrel, the end face of the nut is attached to the driving face of the driving friction piece and is rotationally connected to the bolt inserted into the nut in a threaded mode, the driving friction piece can drive hexagonal nuts, cylindrical nuts, spherical nuts and other nuts of various specifications, and the nut driving device is simple and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of screw and nut assembly, in particular to a nut tightening machine. Background Art

[0002] Screw rod mostly refers to the part with thread on fasteners such as screws and bolts. Bolt is a type of fastener composed of two parts: head and screw rod (cylinder with external thread), and needs to be used with nut; stud has threads on both ends, and the threaded part is called screw rod. It is a fastener without head and is often used with nut. The stud connection can be disassembled, so many workpieces that are frequently disassembled use studs; through-thread screw is a screw rod with thread threads all over the body, so it is also called full-thread screw and full-thread screw rod, and is often used with nut; nut is a nut, a part that is screwed together with the screw for fastening.

[0003] At present, the assembly of nuts and screws mainly uses nut sleeves. Nut sleeves are mostly hexagonal structures that match the nuts. Such nut sleeves must require the nuts to have certain edges and angles so that the nut can be driven. If the nuts are cylindrical, spherical, etc., the existing sleeves have no way to drive them to be threaded with the screws. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a nut tightening machine in response to the above-mentioned current technical status. The driving friction part and the nut end face of the utility model adopt friction transmission. When the nut or the screw has bad teeth, the nut transmission is blocked, and slippage occurs between the nut and the driving friction part, so that the nut stops rotating, thereby avoiding the screw from cutting the hand. The nut end face and the end face of the driving friction part are frictionally transmitted. As long as the nut and the driving friction part are in contact with each other with a certain friction force, it can be driven by the driving friction part. The driving friction part can drive nuts of various specifications such as hexagonal nuts, cylindrical nuts, spherical nuts, etc. It is simple and efficient. The nut positioning cylinder does not rotate with the driving friction part, which is convenient for putting in the nut. At the same time, after the nut is separated from the driving friction part, the nut will no longer be driven, so that the assembly position of the nut and the screw is more accurate.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A nut tightening machine, comprising:

[0007] A bracket, on which a power device is mounted;

[0008] A nut positioning cylinder, which is arranged on the bracket, and a positioning hole is arranged in the center of the nut positioning cylinder, which passes through the nut from top to bottom, and the inner diameter of the positioning hole of the nut positioning cylinder is equal to or larger than the outer diameter of the nut;

[0009] A driving friction member, one end of which is connected to a power device, the power device can drive the driving friction member to rotate, the driving friction member is coaxially arranged with the nut positioning cylinder, and the driving surface of the driving friction member is located below the nut positioning cylinder;

[0010] When the nut is placed in the positioning hole of the nut positioning cylinder, the axis of the nut coincides with or is adjacent to the axis of the nut positioning cylinder, and the end face of the nut is in contact with the driving face of the driving friction member and is rotatably threaded onto the bolt inserted into the nut.

[0011] To optimize the above technical solutions, the measures taken also include:

[0012] The driving friction member comprises an outer sleeve and a driving friction pad, and the driving friction pad is arranged in the outer sleeve.

[0013] The outer sleeve comprises a connecting section and a main body section, wherein the connecting section is fixedly connected to the main body section, and the main body section can be rotated under the drive of the connecting section.

[0014] A connecting hole is arranged at the center of the connecting section of the outer sleeve, and the connecting hole is connected to the output shaft of the power device.

[0015] The connecting section of the outer sleeve is supported on the bearing seat through a bearing, the bearing seat is fixed on the bracket, and the connecting section of the outer sleeve is transmission-matched with the power device.

[0016] A through hole is provided at the center of the driving friction pad.

[0017] The nut positioning cylinder is detachably connected to the bracket, and a flange is provided at the end of the nut positioning cylinder. The flange and the bracket are both provided with corresponding mounting holes and are connected by fasteners.

[0018] An inlet edge is provided at the inlet of the nut positioning cylinder.

[0019] A protective tube is arranged in the positioning hole of the nut positioning tube, and the outer wall of the protective tube is in contact with the inner wall of the positioning hole.

[0020] A regulating rod capable of adjusting the threaded connection length between the nut and the screw rod is arranged below the driving friction pad; the regulating rod is fixed in the connecting hole, and the upper end of the regulating rod is located in the through hole of the driving friction pad.

[0021] The above-mentioned bracket is provided with a fixing seat, and a fixing hole is provided on the fixing seat. The fixing hole is directly opposite to the center of the outer sleeve. The regulating rod is inserted into the fixing hole and can move up and down along the axis of the fixing hole to adjust the length of the nut screwed on the screw rod and locked by the locking screw on the fixing seat.

[0022] The utility model discloses a nut tightening machine, comprising: a bracket, on which a power device is installed; a nut positioning cylinder, which is arranged on the bracket, and a positioning hole which passes through the nut positioning cylinder from top to bottom is arranged at the center of the nut positioning cylinder, and the inner diameter of the positioning hole of the nut positioning cylinder is equal to or larger than the outer diameter of the nut; a driving friction member, one end of which is connected to the power device, and the power device can drive the driving friction member to rotate, the driving friction member is coaxially arranged with the nut positioning cylinder, and the driving surface of the driving friction member is located below the nut positioning cylinder; when the nut is placed in the positioning hole of the nut positioning cylinder, the axis of the nut coincides with or is adjacent to the axis of the nut positioning cylinder, the end face of the nut is in contact with the driving surface of the driving friction member and is rotatably screwed onto the bolt inserted into the nut, and the end face of the nut is ... The end face of the driving friction part is frictionally driven, and the driving friction part and the end face of the nut are frictionally driven. When the nut or screw has bad teeth, the nut transmission is blocked, and slippage occurs between the nut and the driving friction part, causing the nut to stop rotating, thereby avoiding the screw from cutting the hand. The end face of the nut and the end face of the driving friction part are frictionally driven. As long as the nut and the driving friction part have a certain friction in contact, they can be driven by the driving friction part. The driving friction part can drive nuts of various specifications such as hexagonal nuts, cylindrical nuts, and spherical nuts. It is simple and efficient. The nut positioning cylinder does not rotate with the driving friction part, which is convenient for inserting the nut. At the same time, after the nut is separated from the driving friction part, the nut will no longer be driven, making the assembly position of the nut and the screw more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the first embodiment of the utility model;

[0024] Figure 2 It is an exploded schematic diagram of the first embodiment of the utility model;

[0025] Figure 3 This is a structural cross-sectional view of the first embodiment of the utility model;

[0026] Figure 4 yes Figure 3 Enlarged view of middle part I;

[0027] Figure 5 It is a three-dimensional structural schematic diagram of the second embodiment of the utility model;

[0028] Figure 6 It is a side view of the second embodiment of the utility model;

[0029] Figure 7 It is an exploded schematic diagram of the second embodiment of the utility model;

[0030] Figure 8 This is a structural cross-sectional view of the second embodiment of the utility model;

[0031] Fig. 9 yes Figure 8 Enlarged view of part II. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings.

[0033] Figures 1 to 9 It is a structural schematic diagram of the utility model.

[0034] The accompanying drawings are marked as follows: bracket 1, power device 2, nut positioning cylinder 3, positioning hole 31, flange flange 32, introduction edge 33, protective tube 34, driving friction member 4, driving friction pad 41, through hole 42, regulating rod 43, outer sleeve 5, connecting section 51, main body section 52, connecting hole 53, bearing seat 6, bearing 61, transmission member 7, driving wheel 71, driven wheel 72, transmission belt 73, fixed seat 8.

[0035] The utility model is further described in detail below with reference to the accompanying drawings: Example

[0036] like Figures 1 to 4 As shown,

[0037] A nut tightening machine, comprising:

[0038] A bracket 1, on which a power device 2 is installed, and the bracket 1 is provided with screw holes for fixing to a workbench, and is fixed to the workbench by screws;

[0039] The nut positioning cylinder 3 is arranged on the bracket 1. A positioning hole 31 is arranged in the center of the nut positioning cylinder 3 and passes through from top to bottom. The inner diameter of the positioning hole 31 of the nut positioning cylinder 3 is equal to or slightly larger than the outer diameter of the nut. The outer diameter of the nut is the diagonal dimension of the nut or the maximum diameter of the nut. The nut is placed in the positioning hole 31 of the nut positioning cylinder 3. The screw hole of the nut faces the entrance of the nut positioning cylinder 3. The axis of the nut coincides with or is adjacent to the axis of the nut positioning cylinder 3. The screw hole of the nut is in the center, which is convenient for the screw rod to align with the screw hole of the nut.

[0040] A driving friction member 4, one end of which is connected to the power device 2, and the power device 2 can drive the driving friction member 4 to rotate. The driving friction member 4 is coaxially arranged with the nut positioning cylinder 3, and the driving surface of the driving friction member 4 is located below the nut positioning cylinder 3. The driving surface of the driving friction member 4 can be made of a wear-resistant material with a certain friction force, such as silicone and rubber. There is a certain friction force between the driving surface of the driving friction member 4 and the nut, and the nut can be driven to rotate together;

[0041] When the nut is placed in the positioning hole 31 of the nut positioning cylinder 3, the axis of the nut coincides with or is adjacent to the axis of the nut positioning cylinder 3, so that the nut is driven to rotate by the driving friction member 4, and the nut screw hole is in the center position, which is convenient for the screw to align with the nut screw hole. The end face of the nut is in contact with the driving surface of the driving friction member 4 and is rotatably screwed on the bolt inserted into the nut. The end face of the nut and the end face of the driving friction member 4 are frictionally transmitted. When the nut or the screw has bad teeth, the nut transmission is blocked, and slippage occurs between the nut and the driving friction member, causing the nut to stop rotating, thereby avoiding The screw will cut your hand. The end face of the nut and the end face of the driving friction part are frictionally transmitted. As long as the nut and the driving friction part have a certain friction in contact, it can be driven by the driving friction pad. The driving friction part can drive nuts of various specifications such as hexagonal nuts, cylindrical nuts, and spherical nuts. It is simple and efficient. The nut positioning cylinder does not rotate with the driving friction part, which is convenient for inserting the nut. At the same time, after the nut is separated from the driving friction part, the nut positioning cylinder does not rotate. Even if the nut touches the inner wall of the nut positioning cylinder, the nut will no longer be driven, making the assembly position of the nut and the screw more accurate.

[0042] The driving friction part 4 includes an outer sleeve 5 and a driving friction pad 41. The driving friction pad 41 is arranged in the outer sleeve 5. The driving friction pad 41 is flush with or slightly higher than the end surface of the outer sleeve 5. The outer sleeve 5 can support the driving friction pad 41, and it is also convenient for the later replacement of the worn driving friction pad 41.

[0043] The outer sleeve 5 includes a connecting section 51 and a main section 52, the connecting section 51 and the main section 52 are fixedly connected, the main section 52 can rotate under the drive of the connecting section 51, and the driving friction pad 41 is arranged in the main section 52. A step is formed between the connecting section 51 and the main section 52, which can prevent the driving friction pad 41 from moving toward the connecting section 51.

[0044] The power device 2 is a motor, which is fixed on the bracket 1 through a motor bracket. When the power device 2 is a DC motor, it also includes a power adapter and a switch. The DC motor, the power adapter and the switch are electrically connected through a wire. The switch can control the forward and reverse rotation of the DC motor. The power adapter is provided with a speed regulator for adjusting the speed of the DC motor. When the power device 2 is an AC motor, it can be electrically connected to the power supply through a wire. A switch and a power plug are provided on the wire. The switch can control the forward and reverse rotation of the AC motor. It also includes a speed regulator. The speed regulator is electrically connected to the AC motor through a wire, and the speed regulator can adjust the speed of the AC motor.

[0045] A connecting hole 53 is provided at the center of the connecting section 51 of the outer sleeve 5, and the connecting hole 53 is connected to the output shaft of the power device 2. The connecting hole 53 and the output shaft of the power device 2 can be selectively connected by interference fit or threaded connection. The utility model adopts a connecting section 51 of the outer sleeve 5 with a screw hole radially provided, and the output shaft of the power device 2 is locked by a locking screw.

[0046] A through hole 42 is provided at the center of the driving friction pad 41. The diameter of the through hole 42 is smaller than the outer diameter of the nut and larger than the outer diameter of the corresponding screw. It can not only drive the nut but also ensure that the screw can penetrate into the through hole 42, so that the nut can be screwed with the screw at a certain distance. In order to reduce the manufacturing cost, a sleeve (not shown in the figure) can be embedded in the main body section 52, thereby reducing the thickness of the driving friction pad 41 and ensuring that the driving friction pad 41 will not move.

[0047] The nut positioning cylinder 3 is detachably connected to the bracket 1, and a flange flange plate 32 is provided at the end of the nut positioning cylinder 3. The flange flange plate 32 and the bracket 1 are provided with corresponding mounting holes and are connected by fasteners, so as to facilitate the replacement of the nut positioning cylinder 3 corresponding to the nut and improve the adaptability of the machine.

[0048] An introduction edge 33 is provided at the entrance of the nut positioning tube 3 , and the introduction edge 33 has a smooth transition, so that the nut can be easily placed into the positioning hole 31 of the nut positioning tube 3 .

[0049] A protection tube 34 is provided in the positioning hole 31 of the nut positioning tube 3. The outer wall of the protection tube 34 fits the inner wall of the positioning hole 31. The hardness of the protection tube 34 is lower than that of the nut. The nut will not be bruised or scratched when it touches the protection tube 34.

[0050] An adjusting rod 43 is fixed in the connecting hole 53 of the connecting section 51 of the outer sleeve 5. The upper end of the adjusting rod 43 is located in the main section 52. The adjusting rod 43 is inserted into the connecting hole 53 and locked by a locking screw. There is a certain distance between the adjusting rod 43 and the outer end driving surface of the driving friction pad. The adjusting rod 43 is adjusted by changing the distance between the adjusting rod 43 and the outer end driving surface of the driving friction pad. The adjusting rod 43 can prevent the screw from continuing to enter the through hole, thereby adjusting the length of the nut screwed on the screw.

[0051] Method of use of the present invention:

[0052] Turn on the power switch, the power device starts to work, the driving friction member 4 is rotated, and a nut is placed in the positioning hole 31 of the nut positioning tube 3, with the screw hole of the nut facing the entrance of the nut positioning tube 3, the nut axis coincides with or is adjacent to the axis of the nut positioning tube 3, the nut screw hole is in the center position, and the end face of the nut fits with the driving surface of the driving friction member 4. In this way, the nut is driven to rotate by the driving friction member 4, the screw rod is aligned with the nut screw hole and inserted, and the nut is rotated and screwed on the bolt inserted into the nut; when removing the nut, insert the screw rod and the nut into the positioning hole 31 of the nut positioning tube 3 together, so that the nut fits with the driving surface of the driving friction member 4, and the power device is reversed to remove the nut. Example

[0053] like Figures 5 to 9As shown, the structure of the nut tightening machine of this embodiment is basically the same as that of the nut tightening machine in the first embodiment. The difference is that in this embodiment, the connecting section 51 of the outer sleeve 5 is supported on the bearing seat 6 through the bearing 61, the bearing seat 6 is fixed on the bracket 1, the connecting section 51 of the outer sleeve 5 is matched with the power device 2 for transmission, the transmission member 7 includes a driving wheel 71, a driven wheel 72 and a transmission belt 73, the driving wheel 71 is connected to the output shaft of the power device, the driven wheel 72 is sleeved and fixed on the connecting section 51 of the outer sleeve 5, and the transmission belt 73 is sleeved on the driving wheel On the driven wheel 71 and the driven wheel 72, the driving wheel 71 drives the driven wheel 72 to rotate through the transmission belt 73, thereby realizing the rotation of the outer sleeve 5, and screw holes are set on the driving wheel 71 and the driven wheel 72, which are locked by corresponding locking screws. The interior of the connecting section 51 of the outer sleeve 5 and the interior of the main section 52 are connected to each other to form a step hole, which can prevent the driving friction pad 41 from moving toward the connecting section 51. The advantage of this embodiment is that the threaded connection length of the nut and the screw will not be limited by the length of the driving friction member 4, thereby realizing the threaded connection of the long-distance driving nut and the screw.

[0054] A fixing seat 8 is provided on the bracket 1, and a fixing hole is provided on the fixing seat 8. The fixing hole is directly opposite to the center of the outer sleeve 5. The regulating rod 43 is inserted into the fixing hole and can move up and down along the axis of the fixing hole to adjust the length of the nut screwed on the screw rod and locked by the locking screw on the fixing seat 8.

[0055] The best embodiment of the present invention has been explained, and various changes or modifications made by ordinary technicians in this field will not depart from the scope of the present invention.

Claims

1. A nut tightening machine, characterized in that: include: A bracket (1), wherein a power device (2) is mounted on the bracket (1); A nut positioning cylinder (3), the nut positioning cylinder (3) being arranged on the bracket (1), a positioning hole (31) penetrating from top to bottom being arranged at the center of the nut positioning cylinder (3), the inner diameter of the positioning hole (31) of the nut positioning cylinder (3) being equal to or greater than the outer diameter of the nut; a driving friction member (4), one end of the driving friction member (4) being connected to the power device (2), the power device (2) being capable of driving the driving friction member (4) to rotate, the driving friction member (4) being coaxially arranged with the nut positioning cylinder (3), and the driving surface of the driving friction member (4) being located below the nut positioning cylinder (3); When the nut is placed in the positioning hole (31) of the nut positioning cylinder (3), the axis of the nut coincides with or is adjacent to the axis of the nut positioning cylinder (3), and the end face of the nut abuts against the driving face of the driving friction member (4) and is rotatably threaded onto the bolt inserted into the nut.

2. A nut tightening machine according to claim 1, characterized in that: The driving friction member (4) comprises an outer sleeve (5) and a driving friction pad (41), and the driving friction pad (41) is arranged in the outer sleeve (5).

3. A nut tightening machine according to claim 2, characterized in that: The outer sleeve (5) comprises a connecting section (51) and a main section (52); the connecting section (51) and the main section (52) are fixedly connected; driven by the connecting section (51), the main section (52) can rotate.

4. A nut tightening machine according to claim 3, characterized in that: A connecting hole (53) is provided at the center of the connecting section (51) of the outer sleeve (5), and the connecting hole (53) is connected to the output shaft of the power device (2).

5. A nut tightening machine according to claim 3, characterized in that: The connecting section (51) of the outer sleeve (5) is supported on a bearing seat (6) via a bearing (61); the bearing seat (6) is fixed on the bracket (1); and the connecting section (51) of the outer sleeve (5) is in transmission cooperation with the power device (2).

6. A nut tightening machine according to claim 4 or 5, characterized in that: A through hole (42) is provided at the center of the driving friction pad (41).

7. A nut tightening machine according to claim 6, characterized in that: The nut positioning cylinder (3) is detachably connected to the bracket (1); a flange flange plate (32) is provided at the end of the nut positioning cylinder (3); corresponding mounting holes are provided on the flange flange plate (32) and the bracket (1) and are connected via fasteners.

8. A nut tightening machine according to claim 7, characterized in that: An introduction edge opening (33) is provided at the entrance of the nut positioning cylinder (3).

9. A nut tightening machine according to claim 8, characterized in that: A protection tube (34) is arranged in the positioning hole (31) of the nut positioning tube (3), and the outer wall of the protection tube (34) is in contact with the inner wall of the positioning hole (31).

10. A nut tightening machine according to claim 9, characterized in that: A regulating rod (43) capable of adjusting the threaded connection length between the nut and the screw rod is arranged below the driving friction pad (41).

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