Adjustable displacement device for four-shaft tightening machine

Abstract

The utility model discloses an adjustable displacement device for a four-axis tightening machine, which comprises a fixed plate, four tightening guns are slidably connected to the fixed plate, the four tightening guns are circumferentially arranged at equal intervals relative to the circle center of the fixed plate, the fixed plate is rotatably connected with a rotating plate, the rotating plate is coaxially arranged on the fixed plate, and the rotating plate rotates around the virtual central axis of the rotating plate. The tightening guns are coaxially and fixedly connected with extension rods, the extension rods penetrate through the rotating plate, and along with rotation of the rotating plate, the four tightening guns can be close to or away from one another, so that synchronous movement in the radial direction of the fixing plate is achieved. The four rubber rings are gradually close to one another until the bolts are clamped and fixed, the four rubber rings are close to the rotating plate under the magnetic action of the magnetic blocks, the rubber blocks tightly abut against the rotating plate, the rotating plate cannot rotate freely, excessive screwing is avoided, excessive pressure on the structure is reduced, and the service life of the structure is prolonged. And meanwhile, the consumption of electric energy is reduced while the bolt is clamped and fastened.

Description

Technical Field

[0001] The utility model relates to the technical field of tightening machines, in particular to an adjustable displacement device for a four-axis tightening machine. Background Art

[0002] Bolts are a widely used detachable fixing connector with simple structure, reliable connection and easy assembly and disassembly. They are widely used in various large and medium-sized electromechanical equipment. Bolts are basically tightened by bolt tightening equipment, so bolt tightening equipment directly affects the quality of bolt equipment.

[0003] The patent document with announcement number CN212823808U and name "A radial equidistant displacement mechanism for a three-axis tightening machine" discloses a radial equidistant displacement mechanism for a three-axis tightening machine, including a fixed mounting plate, a front rotating toothed plate is provided on one side of the bottom of the fixed mounting plate, and an arc-shaped rack is provided on one side of the front rotating toothed plate, a fixed groove is opened on one side of the fixed mounting plate, and a sliding fixed block is fixed to one side of the fixed groove by bolts, a guide pressure block is fixed to the top of the sliding fixed block by bolts, a tightening gun is plugged into the top of the guide pressure block, a plug-in hole is opened on one side of the fixed mounting plate, and a rotating rod is plugged into the plug-in hole.

[0004] The above technical solution can accurately change the radial spacing at one time by setting the tightening gun and the front rotating toothed plate, and can flexibly change to continuously different spacings, so as to realize the tightening of bolts on different pitch circles and improve the work efficiency. However, the inventors found that the above technical solution has the following defects:

[0005] When the above-mentioned tightening machine is adjusted, the front rotating toothed plate is rotated accordingly through the servo motor and the reducer until each tightening gun clamps and tightens the bolt synchronously. However, the clamping and tightening of the bolt is mainly through the continuous power output of the servo motor, which is easy to over-tighten, and the bolt will exert a reaction force on each tightening gun. The reaction force is opposite to the power output of the servo motor. Long-term use can easily cause damage to the servo motor and the reducer and consume too much electricity. Utility Model Content

[0006] The utility model aims to provide an adjustable displacement device for a four-axis tightening machine, so as to avoid over-tightening, reduce excessive pressure on the structure, and reduce the consumption of electric energy while maintaining the clamping and tightening of the bolts.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An adjustable displacement device for a four-axis tightening machine comprises a fixed plate, the fixed plate is slidably connected to four tightening guns, the four tightening guns are equidistantly arranged relative to the center circle circumference of the fixed plate, the fixed plate is rotatably connected to a rotating plate, the rotating plate is coaxially arranged with the fixed plate, and its virtual central axis is the rotation center, the tightening gun is coaxially fixedly connected to an extension rod, and the extension rod passes through the rotating plate. As the rotating plate rotates, the four tightening guns can approach or move away from each other, thereby realizing synchronous movement in the radial direction of the fixed plate.

[0009] Preferably, the fixed plate is provided with four slide grooves, the slide grooves penetrate the fixed plate, the four slide grooves are arranged equidistantly relative to the center circumference of the fixed plate, the slide grooves are slidably connected with rectangular blocks, the two sides of the rectangular blocks are respectively fixedly connected with the corresponding tightening gun and the extension rod, the rectangular block is fixedly connected with four limit blocks, the four limit blocks are respectively located on both sides of the slide groove and conflict with the fixed plate.

[0010] Preferably, the displacement device also includes a mounting ring, the inner circumferential wall of the mounting ring is fixedly connected to the outer edge of the fixed plate, the inner circumferential wall of the mounting ring is also fixedly connected to two limiting arc plates, the rotating plate is provided with an annular groove, and the limiting arc plates are slidably connected to the annular groove.

[0011] Preferably, the rotating plate is provided with four adjustment slots, each of which has a first port and a second port, the distance between the first port and the center of the rotating plate is a first distance, the distance between the second port and the center of the rotating plate is a second distance, and the first distance is greater than the second distance.

[0012] Preferably, at least one arc groove is provided in the mounting ring, an elastic arc rubber block is fixedly connected to the arc groove, the outer edge of the rubber block protrudes relative to the outer edge of the mounting ring, a magnetic block is arranged in the rubber block, and the rotating plate can be magnetically attracted to the magnetic block.

[0013] Preferably, a slot is formed at one end of the tightening gun, a rubber ring is provided at the slot, an insert block extends from the inner peripheral wall of the rubber ring, and the insert block is located in the slot.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model gradually brings four rubber rings closer to each other until the bolts are clamped and fixed. Under the magnetic effect of the magnetic block, the four rubber rings approach the rotating plate and make the rubber block tightly contact the rotating plate, so that the rotating plate cannot rotate freely, avoiding over-tightening and reducing excessive pressure on the structure. At the same time, the consumption of electric energy is reduced while the bolts are clamped and tightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of an adjustable displacement device for a four-axis tightening machine proposed by the utility model;

[0017] Figure 2 for Figure 1 A structural diagram from another perspective;

[0018] Figure 3 This is a schematic diagram of the structure decomposition of an adjustable displacement device for a four-axis tightening machine proposed by the utility model;

[0019] Figure 4 This is a schematic structural diagram of a tightening gun and a rubber ring thereon in an adjustable displacement device for a four-axis tightening machine proposed by the utility model;

[0020] Figure 5 The utility model discloses a structural schematic diagram of a rubber block and a magnetic block therein in an adjustable displacement device for a four-axis tightening machine.

[0021] In the figure:

[0022] 10. Fixed plate; 11. Tightening gun; 12. Rotating plate; 13. Extension rod; 14. Slide; 15. Rectangular block; 16. Limit block; 17. Mounting ring; 18. Arc plate; 19. Ring groove;

[0023] 20. Adjustment slot; 21. Arc slot; 22. Rubber block; 23. Magnetic block; 24. Slot; 25. Rubber ring; 26. Insert block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] Reference Figure 1-Figure 5, an adjustable displacement device for a four-axis tightening machine, including a fixed plate 10, the fixed plate 10 is slidably connected with four tightening guns 11, the four tightening guns 11 are equidistantly arranged relative to the center circumference of the fixed plate 10, the fixed plate 10 is rotatably connected with a rotating plate 12, the rotating plate 12 is coaxially arranged with the fixed plate 10, with its virtual central axis as the rotation center, the tightening gun 11 is coaxially fixedly connected with an extension rod 13, the extension rod 13 passes through the rotating plate 12, with the rotation of the rotating plate 12, the four tightening guns 11 can approach or move away from each other, realizing synchronous movement in the radial direction of the fixed plate 10.

[0026] As the rotating plate 12 rotates accordingly, the four tightening guns 11 move synchronously to tighten the bolts.

[0027] Furthermore, the fixed plate 10 is provided with four slide grooves 14, which penetrate the fixed plate 10, and are arranged equidistantly relative to the center circumference of the fixed plate 10. The slide grooves 14 are slidably connected to a rectangular block 15, and the two sides of the rectangular block 15 are respectively fixedly connected to the corresponding tightening gun 11 and the extension rod 13. The rectangular block 15 is fixedly connected to four limit blocks 16, and the four limit blocks 16 are respectively located on both sides of the slide groove 14 and conflict with the fixed plate 10.

[0028] Reference Figure 1 and attached Figure 3 The purpose of setting the four limit blocks 16 on the rectangular block 15 is to prevent the rectangular block 15 from escaping from the slide groove 14 and ensure that the rectangular block 15 slides smoothly in the slide groove 14.

[0029] Furthermore, the displacement device also includes a mounting ring 17, the inner circumferential wall of the mounting ring 17 is fixedly connected to the outer edge of the fixed plate 10, the inner circumferential wall of the mounting ring 17 is also fixedly connected to two limiting arc plates 18, the rotating plate 12 is provided with an annular groove 19, and the limiting arc plates 18 are slidably connected to the annular groove 19.

[0030] Reference Figure 3 By limiting the arc plate 18 in the annular groove 19 , the rotating plate 12 cannot be separated from the mounting ring 17 , and the rotating plate 12 can also rotate about the central axis of the fixed plate 10 .

[0031] Furthermore, the rotating plate 12 is provided with four adjustment slots 20, the adjustment slot 20 has a first port and a second port, the distance between the first port and the center of the rotating plate 12 is a first distance, the distance between the second port and the center of the rotating plate 12 is a second distance, and the first distance is greater than the second distance.

[0032] Furthermore, at least one arc groove 21 is opened in the mounting ring 17, and an elastic arc rubber block 22 is fixedly connected to the arc groove 21. The outer edge of the rubber block 22 is raised relative to the outer edge of the mounting ring 17, and a magnetic block 23 is arranged in the rubber block 22. The rotating plate 12 can be magnetically attracted to the magnetic block 23.

[0033] Reference Figure 5 , wherein a slot body which is not connected to the outside is opened in the rubber block 22, so that the magnetic block 23 is located in the slot body, and at the same time ensures that the magnetic block 23 is slightly smaller than the slot body;

[0034] Specifically, both ends of the rubber block 22 are fixedly bonded to the arc groove 21 by adhesive, but one arc side wall in contact with the arc groove 21 is not bonded to the arc groove 21, so as to facilitate applying force to the rubber block 22 to cause deformation.

[0035] Furthermore, a slot 24 is formed at one end of the tightening gun 11 , and a rubber ring 25 is disposed at the slot 24 . An insert block 26 extends from the inner peripheral wall of the rubber ring 25 , and the insert block 26 is located in the slot 24 .

[0036] Reference Figure 4 In order to ensure that the four tightening guns 11 can clamp and tighten the bolts at the same time, it is necessary to ensure the integrity of the rubber ring 25 on the tightening gun 11. The rubber ring 25 is prone to friction loss after working for a period of time and needs to be replaced. The plug-in and pull-out method of the plug block 26 and the slot 24 facilitates the installation of a new rubber ring 25 on the tightening gun 11.

[0037] The working principle of this utility model:

[0038] First, a bolt is placed between four rubber rings 25 and acts on the rubber block 22, causing the rubber block 22 to deform and causing the magnetic block 23 inside the rubber block 22 to face away from the rotating plate 12. Then, the friction fixing effect of the rubber block 22 on the rotating plate 12 disappears, and the rotating plate 12 can be moved to move the extension rod 13 from the first end toward the second end. Then, the four rubber rings 25 gradually approach each other until the bolt is clamped and fixed, and the force applied to the rubber block 22 is canceled. Under the magnetic effect of the magnetic block 23, the rubber block 25 approaches the rotating plate 12 and makes the rubber block 22 tightly contact the rotating plate 12, so that the rotating plate 12 cannot rotate freely, thereby avoiding over-tightening and reducing excessive pressure on the structure. At the same time, while keeping the bolt clamped and tightened, the consumption of electric energy is also reduced.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An adjustable displacement device for a four-axis tightening machine, characterized in that: The invention comprises a fixed plate (10), wherein the fixed plate (10) is slidably connected to four tightening guns (11), and the four tightening guns (11) are equidistantly arranged relative to the center circumference of the fixed plate (10); the fixed plate (10) is rotatably connected to a rotating plate (12), and the rotating plate (12) is coaxially arranged with the fixed plate (10), with its virtual central axis as the rotation center; the tightening guns (11) are coaxially fixedly connected to an extension rod (13), and the extension rod (13) passes through the rotating plate (12); as the rotating plate (12) rotates, the four tightening guns (11) can approach or move away from each other, thereby realizing synchronous movement in the radial direction of the fixed plate (10); The displacement device further comprises a mounting ring (17), the inner peripheral wall of the mounting ring (17) is fixedly connected to the outer edge of the fixed plate (10), the inner peripheral wall of the mounting ring (17) is further fixedly connected to two limiting arc plates (18), the rotating plate (12) is provided with an annular groove (19), and the limiting arc plates (18) are slidably connected to the annular groove (19); At least one arc-shaped groove (21) is provided on the mounting ring (17), and an elastic arc-shaped rubber block (22) is fixedly connected to the arc-shaped groove (21). The outer edge of the rubber block (22) is raised relative to the outer edge of the mounting ring (17), and a magnetic block (23) is provided in the rubber block (22). The rotating plate (12) can be magnetically attracted to the magnetic block (23).

2. The adjustable displacement device for a four-axis tightening machine according to claim 1, characterized in that: The fixed plate (10) is provided with four sliding grooves (14), the sliding grooves (14) pass through the fixed plate (10), and the four sliding grooves (14) are equidistantly arranged relative to the center circumference of the fixed plate (10). The sliding grooves (14) are slidably connected to a rectangular block (15), and the two sides of the rectangular block (15) are respectively fixedly connected to the corresponding tightening gun (11) and the extension rod (13). The rectangular block (15) is fixedly connected to four limit blocks (16), and the four limit blocks (16) are respectively located on both sides of the sliding groove (14) and conflict with the fixed plate (10).

3. The adjustable displacement device for a four-axis tightening machine according to claim 1, characterized in that: The rotating plate (12) is provided with four adjustment slots (20), each of the adjustment slots (20) having a first port and a second port, the distance between the first port and the center of the rotating plate (12) being a first distance, the distance between the second port and the center of the rotating plate (12) being a second distance, and the first distance being greater than the second distance.

4. The adjustable displacement device for a four-axis tightening machine according to claim 1, characterized in that: A slot (24) is provided at one end of the tightening gun (11), a rubber ring (25) is provided at the slot (24), an insert block (26) extends from the inner peripheral wall of the rubber ring (25), and the insert block (26) is located in the slot (24).

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