Torque fixing device

Abstract

The utility model discloses a torque fixing device which comprises a fixing part, a rotating part, an elastic element and a limiting ring. The fixing part is of a stepped shaft-shaped structure and comprises a matching section, a transition section and a connecting section, the diameters of the matching section, the transition section and the connecting section are sequentially reduced, a circle of first ratchets are arranged on the end face, close to one side of the transition section, of the matching section, and the other end of the matching section is used for being fixedly connected with a threaded rod in the positioning fastener; the rotating part comprises a sleeve with one closed end and a nut, a through hole allowing the transition section to penetrate through is formed in the closed end of the sleeve, a circle of second ratchets are arranged on the outer end face of the closed end of the sleeve, and the nut is fixedly arranged on the outer wall of the other end of the sleeve in a sleeving mode; the elastic element is arranged in the sleeve; the limiting ring is fixedly arranged on the connecting section in a sleeving mode, and the elastic element is compressed between the limiting ring and the closed end of the sleeve. According to the utility model, the matching section in the fixed torquer is fixed with the screw rod in the positioning fastener, and the fixed torquer is utilized to stably control the torque of the rotating screw rod, so that the problem that the clamping force of the positioning fastener is too large or too small is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of torque wrenches, in particular to a torquer. Background Art

[0002] At present, a large number of positioning fasteners are needed on structures such as the fuselage nose, belly and wing skin to temporarily position and fasten the skin panels. These positioning fasteners are shown in patents with publication numbers CN205043662U and CN216812428U. The structure of the positioning fasteners is usually composed of a hollow chuck, a support rod, a threaded rod and a connecting nut. The connecting nut is fixed to the tail end of the hollow chuck, and one end of the threaded rod extends into the hollow chuck after passing through the connecting nut and is fixed to the support rod. When the two structural members are clamped and fastened, the threaded rod is driven to rotate by directly rotating the threaded rod or by rotating a driving nut fixed integrally with the threaded rod, so that the threaded rod moves relative to the connecting nut and the hollow chuck. During the movement of the threaded rod, the support rod is driven to move to open the hollow chuck, thereby positioning and fixing the two skin panels.

[0003] When the above-mentioned positioning fasteners are temporarily positioned and fastened, the torque of rotating the threaded rod will affect the clamping force of the positioning fasteners. If the clamping force of the positioning fasteners is too small, the skin panels will not fit tightly and the gap will be too large. If the clamping force is too large, the edges of the holes in the skin panels of metal or composite materials will be crushed and the temporary positioning fasteners will be accidentally damaged. Therefore, a torquer is required to achieve stable control of the torque of the rotating threaded rod. Utility Model Content

[0004] The utility model aims to provide a torquer to solve the problem in the prior art that it is difficult to stably control the torque of a rotating threaded rod.

[0005] The technical solution of the utility model is:

[0006] A torquer, comprising a fixed part, a rotating part, an elastic element and a limiting ring; the fixed part is a stepped shaft structure, comprising a mating section, a transition section and a connecting section with successively decreasing diameters, a plurality of first ratchet teeth are arranged on the end face of the mating section close to the transition section, the plurality of first ratchet teeth are evenly distributed around the transition section, and each first ratchet tooth is arranged along the axial direction of the mating section, the first ratchet tooth has a first face and a second face, the first face is perpendicular to the end face of the mating section, the second face is an inclined face, and one end of the inclined face is connected to the first face, and the other end of the inclined face is connected to the first face of an adjacent first ratchet tooth, and the end face of the mating section facing away from the transition section is used for positioning The threaded rod in the fastener is fixedly connected; the rotating part includes a sleeve with one end closed and a nut, the closed end of the sleeve is provided with a through hole for the transition section to pass through, a circle of second ratchet teeth is provided on the outer end surface of the closed end of the sleeve, the shape and structure of the second ratchet teeth are the same as the shape and structure of the first ratchet teeth, and the second surface of the second ratchet teeth contacts the second surface of the first ratchet teeth, and the nut is fixedly sleeved on the outer wall of the other end port of the sleeve; the elastic element is arranged in the sleeve; the limiting ring is fixedly sleeved on the connecting section and is located at the other end port of the sleeve, and the elastic element is compressed between the limiting ring and the closed end of the sleeve.

[0007] Preferably, the included angle between the second surface of the first ratchet tooth and the end surface of the matching section is in the range of 10° to 30°.

[0008] Preferably, a wear-resistant layer is provided on the contact surface between the first ratchet tooth and the second ratchet tooth.

[0009] Preferably, the elastic element is a compression spring, and the compression spring is sleeved on the transition section, with two ends of the compression spring respectively abutting against the closed end of the sleeve and the limiting ring.

[0010] Preferably, the nut can be replaced by a spur spline, and the spur spline is arranged on the circumferential outer wall of the sleeve.

[0011] Preferably, the limiting ring is an annular ring, and a central hole of the annular ring is connected to the circumferential outer wall of the connecting section.

[0012] Preferably, the center hole of the annular ring is a tapered countersunk hole, the connecting section is a thin-walled tubular structure, and the connecting section and the tapered countersunk hole of the annular ring are fixedly connected by riveting.

[0013] Preferably, the diameter of the fitting section is equal to the outer diameter of the sleeve.

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

[0015] The utility model fixes the matching section in the torque device with the screw in the positioning fastener, and uses the torque device to form a stable control of the torque of the rotating screw, thereby avoiding the problem of excessive or insufficient clamping force of the positioning fastener. In the torque device, the first ratchet, the second ratchet and the elastic element cooperate with each other. During the clamping process, the elastic element is in a compressed state, and the elastic force of the elastic element acts on the closed end surface of the sleeve, so that the second surface of the second ratchet is fitted with the second surface of the first ratchet. When the tightening torque is greater than the friction resistance between the second ratchet and the first ratchet, the second ratchet will rotate relative to the first ratchet. During the rotation of the second ratchet, the friction force will also drive the first ratchet and the fixed part to rotate. When the rotating part rotates relative to the fixed part, it will still drive the fixed part to rotate and drive the screw in the positioning fastener to rotate through the fixed part to realize the clamping process until the second ratchet passes over the highest point of the second surface of the first ratchet. At this time, the required tightening torque is the largest, and slippage occurs, thereby forming a fixed torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixing part in the utility model;

[0019] Figure 4 It is a cross-sectional structural schematic diagram of the utility model;

[0020] Figure 5 It is a side view structural schematic diagram of the utility model;

[0021] Figure 6 This is a schematic diagram of the connection structure between the utility model and the positioning fastener;

[0022] Figure 7 It is a structural schematic diagram of the utility model and the positioning fastener for clamping work. DETAILED DESCRIPTION

[0023] The following is combined with Figures 1 to 7 , the specific implementation methods of the utility model are described in detail. In the description of the utility model, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the utility model, unless otherwise specified, "plurality" means two or more.

[0025] Example 1

[0026] like Figures 1 to 5 As shown, an embodiment of the utility model provides a torquer, including a fixed part 1, a rotating part 2, an elastic element 3 and a limit ring 4; the fixed part 1 is a stepped shaft structure, including a matching section 11, a transition section 12 and a connecting section 13 with successively decreasing diameters, a plurality of first ratchet teeth 111 are provided on the end surface of the matching section 11 close to the transition section 12, the plurality of first ratchet teeth 111 are evenly distributed around the transition section 12, and each of the first ratchet teeth 111 is arranged along the axial direction of the matching section 11, the first ratchet teeth 111 have a first surface and a second surface, the first surface is perpendicular to the end surface of the matching section 11, the second surface is an inclined surface, and one end of the inclined surface is connected to the first surface, and the other end of the inclined surface is connected to the first surface of the adjacent first ratchet teeth 111, and the matching section 11 is facing away from the transition section The end face of 12 is used for fixed connection with the threaded rod in the positioning fastener; the rotating part 2 includes a sleeve 21 with one end closed and a nut 22. The closed end of the sleeve 21 is provided with a through hole for the transition section 12 to pass through. A circle of second ratchet teeth 211 is provided on the outer end face of the closed end of the sleeve 21. The shape and structure of the second ratchet teeth 211 are the same as the shape and structure of the first ratchet teeth 111, and the second surface of the second ratchet teeth 211 contacts the second surface of the first ratchet teeth 111. The nut 22 is fixed on the outer wall of the other end port of the sleeve 21; the elastic element 3 is arranged in the sleeve 21; the limiting ring 4 is fixed on the connecting section 13 and is located at the other end port of the sleeve 21. The elastic element 3 is compressed between the limiting ring 4 and the closed end of the sleeve 21.

[0027] In this embodiment, the matching section 11 in the torquer is fixed to the screw in the positioning fastener, and the torquer is used to control the torque of the rotating screw, so as to avoid the problem of excessive or insufficient clamping force of the positioning fastener. It is stipulated that the clockwise rotation of the screw in the positioning fastener is the clamping process, and the counterclockwise rotation of the screw in the positioning fastener is the loosening process. Through the mutual cooperation of the first ratchet tooth 111, the second ratchet tooth 211 and the elastic element 3, when the nut 22 is rotated clockwise by the wrench tool, the nut 22 will drive the sleeve 21 and the second ratchet tooth 211 to rotate clockwise synchronously. Since the elastic element 3 is in a compressed state, the elastic force of the elastic element 3 acts on the closed end surface of the sleeve 21, so that the second surface of the second ratchet tooth 211 is fitted with the second surface of the first ratchet tooth 111. When the wrench torque is greater than the friction resistance between the second ratchet tooth 211 and the first ratchet tooth 111, the second ratchet tooth 211 will be loosened. The tooth 211 rotates relative to the first ratchet tooth 111, and the friction force used in the rotation of the second ratchet tooth 211 will also drive the first ratchet tooth 111 and the fixed part 1 to rotate, so that when the rotating part 1 rotates relative to the fixed part 1, it will still drive the fixed part 1 to rotate and drive the screw in the positioning fastener to rotate through the fixed part 1 to realize the clamping process, until the second ratchet tooth 211 passes over the highest point of the second surface of the first ratchet tooth 111. At this time, the required tightening torque is the largest, and slippage occurs, thereby forming a fixed torque to ensure that the clamping force of the positioning fastener is neither too large nor too small. When the nut 22 is rotated counterclockwise, the second ratchet tooth 211 on the rotating part 2 and the vertical surface of the first ratchet tooth 111 on the fixed part 1 are tightly attached to each other, and there is no mutual rotation between the two, that is, synchronous rotation. Therefore, counterclockwise rotation of the rotating part 2 can quickly and synchronously drive the fixed part 1 and the screw in the positioning fastener to rotate counterclockwise, thereby realizing a quick disassembly process.

[0028] The outer contour of the nut 22 is any one of a regular hexagon, a regular octagon, and a regular dodecagon, and the nut 22 is rotated by a matching socket wrench.

[0029] Furthermore, the angle between the second surface of the first ratchet tooth 111 and the end surface of the mating section 11 is in the range of 10° to 30°. When the angle of the second surface is less than 10°, the friction force between the first ratchet tooth 111 and the second ratchet tooth 211 will be too small, resulting in too small a clamping force of the positioning fastener. When the angle of the second surface is greater than 30°, the friction force between the first ratchet tooth 111 and the second ratchet tooth 211 will be too large, resulting in too large a clamping force of the positioning fastener.

[0030] Furthermore, considering that the screw in the positioning fastener is driven to rotate by friction between the first ratchet tooth 111 and the second ratchet tooth 211, the contact surface between the first ratchet tooth 111 and the second ratchet tooth 211 will be worn during long-term use, and a constant torque cannot be formed. Therefore, a wear-resistant layer is provided on the contact surface between the first ratchet tooth 111 and the second ratchet tooth 211, and the wear-resistant layer is a metal alloy layer, such as alloy steel or titanium alloy.

[0031] Specifically, Figure 1 As shown, the elastic element 3 is a compression spring, which is sleeved on the transition section 12 , and the two ends of the compression spring are respectively in contact with the closed end of the sleeve 21 and the limiting ring 4 .

[0032] Furthermore, the nut 22 can be replaced by a spur spline, which is arranged on the circumferential outer wall of the sleeve 21. During processing, the spur spline and the circumferential outer wall of the sleeve 21 are integrally turned, and the sleeve 21 is driven to rotate by directly rotating the spur spline with an internal spline socket wrench.

[0033] Specifically, Figure 1 As shown, the limiting ring 4 is an annular ring, and the center hole of the annular ring is connected to the circumferential outer wall of the connecting section 13 .

[0034] Furthermore, the center hole of the annular ring is a tapered countersunk hole, the connecting section 13 is a thin-walled tubular structure, and the connecting section 13 and the tapered countersunk hole of the annular ring are fixedly connected by riveting.

[0035] Furthermore, the diameter of the matching section 11 is equal to the outer diameter of the sleeve 21, so that there is no protrusion after the fixed part 1 and the rotating part 2 are assembled, and the first ratchet 111 and the second ratchet 211 are protected to prevent the first ratchet 111 or the second ratchet 211 from protruding.

[0036] Among them, some dimensional parameters of the utility model in specific application are as follows: the outer diameter of the mating section 11 in the fixing part 1 is 12.40 mm, the number of first ratchet teeth 111 arranged on the end face of the mating section 11 is 12, the tooth development length of each first ratchet tooth 111 is 3.246 mm, the central angle is 30°, and the tooth height is 0.5 mm; the outer diameter of the sleeve 21 is 12.40 mm, the nut 22 is a hexagonal nut, the number of second ratchet teeth 211 arranged on the end face of the sleeve 21 is 12, the tooth development length of each second ratchet tooth 211 is 3.246 mm, the central angle is 30°, and the tooth height is 0.5 mm.

[0037] It should be noted that the utility model is applicable to aircraft structures with apertures ranging from 2 mm to 30 mm and stacked interlayer thickness ranging from 2 mm to 100 mm.

[0038] The utility model is suitable for the use environment where materials such as 7050-T7451, Ti6Al4V, T800, GH2132, etc. are installed in any combination.

[0039] The utility model adopts a combination of a single-layer aluminum alloy and a single-layer T800 in specific implementation, the total thickness of the interlayer is 15mm, and the aperture is 6.35mm.

[0040] The fixed torque of the torquer of the utility model is about 3N·m, that is, it starts to slip under this torque, and the clamping force is 500N±15N.

[0041] In specific use, such as Figure 6 As shown, the end surface of the matching section 11 in the torquer is welded and fixed to the screw 61 in the positioning fastener 6 to form a fixed torque temporary positioning fastener. The method of clamping two structural plates using the fixed torque temporary positioning fastener is as follows:

[0042] Reference Figure 7 (a) Before clamping, the head of the clamp in the positioning fastener 6 is in a retracted state, and the diameter of the clamp head is smaller than the hole diameter of the first structural plate 7 and the second structural plate 8. Manually align the axis of the fixed moment temporary positioning fastener with the axis of the hole of the first structural plate 7 and the second structural plate 8.

[0043] Reference Figure 7 (b) passing the clamp in the positioning fastener 6 through the first structural plate 7 and the second structural plate 8, and making the end surface of the positioning fastener 6 close to the left end surface of the first structural plate 7;

[0044] Reference Figure 7 (c) Use the hexagonal socket wrench to tighten the nut 22 in the torquer clockwise, and through the cooperation between the first ratchet 111 and the second ratchet 211 and the elastic element 3, drive the screw 61 in the positioning fastener 6 to rotate, so that the chuck moves to the left. During the movement of the screw 61, the support rod connected to it is used to open the head of the chuck until the chuck clamps the two structural plates;

[0045] Reference Figure 7 (d) During disassembly, use a hexagonal socket wrench to tighten the nut 22 in the torque converter counterclockwise, and use the second ratchet 211 to drive the first ratchet 111 and the fixing part 1 to rotate counterclockwise synchronously, thereby driving the screw in the positioning fastener to rotate counterclockwise synchronously through the fixing part 1. At this time, the chuck moves to the right and the chuck head begins to shrink until the chuck diameter is smaller than the structural hole diameter, and the positioning fastener is manually pulled out along the axial direction of the structural hole.

[0046] The above disclosures are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A torque device, characterized in that: include: The fixing portion (1) is a stepped shaft structure, comprising a matching section (11), a transition section (12) and a connecting section (13) of which the diameters decrease successively; a plurality of first ratchet teeth (111) are arranged on the end surface of the matching section (11) close to the transition section (12); the plurality of first ratchet teeth (111) are evenly arranged around the transition section (12), and each first ratchet tooth (111) is arranged along the axial direction of the matching section (11); the first ratchet tooth (111) has a first surface and a second surface; the first surface is perpendicular to the end surface of the matching section (11); the second surface is an inclined surface, and one end of the inclined surface is connected to the first surface, and the other end of the inclined surface is connected to the first surface of an adjacent first ratchet tooth (111); the end surface of the matching section (11) facing away from the transition section (12) is used for fixed connection with a threaded rod in a positioning fastener; The rotating part (2) comprises a sleeve (21) with one end closed and a nut (22), the closed end of the sleeve (21) is provided with a through hole for the transition section (12) to pass through, the outer end surface of the closed end of the sleeve (21) is provided with a second ratchet tooth (211), the shape and structure of the second ratchet tooth (211) are the same as those of the first ratchet tooth (111), and the second surface of the second ratchet tooth (211) is in contact with the second surface of the first ratchet tooth (111), and the nut (22) is sleeved and fixed on the outer wall of the other end of the sleeve (21); An elastic element (3) is arranged in the sleeve (21); The limiting ring (4) is sleeved and fixed on the connecting section (13) and is located at the other end of the sleeve (21). The elastic element (3) is compressed between the limiting ring (4) and the closed end of the sleeve (21).

2. The torque device according to claim 1, characterized in that: The included angle between the second surface of the first ratchet tooth (111) and the end surface of the matching section (11) is in the range of 10° to 30°.

3. The torque device according to claim 1, characterized in that: The second surface of the first ratchet tooth (111) and the second surface of the second ratchet tooth (211) are both provided with a wear-resistant layer.

4. The torque device according to claim 1, characterized in that: The elastic element (3) is a compression spring, which is sleeved on the transition section (12), and the two ends of the compression spring are respectively in contact with the closed end of the sleeve (21) and the limiting ring (4).

5. The torque device according to claim 1, characterized in that: The nut (22) can be replaced by a straight spline, and the straight spline is arranged on the circumferential outer wall of the sleeve (21).

6. The torque device according to claim 1, characterized in that: The limiting ring (4) is an annular ring, and the center hole of the annular ring is connected to the circumferential outer wall of the connecting section (13).

7. The torque device according to claim 6, characterized in that: The center hole of the annular ring is a conical countersunk hole, the connecting section (13) is a thin-walled tubular structure, and the connecting section (13) and the conical countersunk hole of the annular ring are fixedly connected by riveting.

8. The torque device according to claim 1, characterized in that: The diameter of the matching section (11) is equal to the outer diameter of the sleeve (21).

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