Self-sealing and self-locking nut

Abstract

The utility model relates to the technical field of torsion measuring discs, in particular to a self-sealing and self-locking nut which comprises an elastic element body, a middle protective cover is arranged in the elastic element body, an oil return pipe is installed at the end close to the middle protective cover, and one end of the oil return pipe penetrates through a first outer protective cover. A second outer protective cover is installed in the middle of the other end of the elastic element body, an oil spraying pipe is installed in the middle of the second outer protective cover, and a second O-shaped sealing ring and a set screw are installed at one end of the oil spraying pipe. The sealing effect of the nut body of the non-standard design is improved through the polytetrafluoroethylene bushing and the O-shaped ring, the hydraulic cylinder stretches out and draws back to push the moving block to push the polytetrafluoroethylene bushing, the polytetrafluoroethylene bushing extrudes the spring to enable the spring to be shrunk, the polytetrafluoroethylene bushing can be loosened conveniently, replacement is convenient, and the sealing effect of the torsion measuring disc can be improved conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of torsion disk, especially relates to a self-sealing self-locking nut. BACKGROUND

[0002] The torsion disk is a flange disk type torque sensor, which adopts a strain bridge test device to test the reverse torque, and does not rotate itself. The torsion disk is an installation support for front and rear parts and a deformation elastic element.

[0003] In the patent with the publication number CN118329253A, an aero-engine starting torque measurement device with a lubricating oil circuit is provided. The device includes a torsion disk, an end face with a sealing steel sleeve, an outer sleeve conduit, a steel sleeve, a first O-ring, a second O-ring, and a third O-ring. By using the torsion device between the aero-engine transmission case and the starting motor, the starting torque of the transmission shaft can be measured without direct measurement, effectively solving the problems of limited installation space and high-speed vibration of small aero-engines. The flexible connection of the oil inlet pipe and the oil return pipe with the torsion disk eliminates the dispersion of the lubricating oil pipeline on the starting torque and solves the problem of measurement accuracy. However, the patent still has the following problems:

[0004] The above-mentioned oil inlet pipe is installed by a nut, but there is a gap between the nut and the installation position of the torsion disk. The nut is tightened and prevented from loosening by using a non-standard flat washer with an O-ring groove and an O-ring. Since the nut and the flat washer are two independent parts, only the nut has threads, and under the condition of ensuring a certain thread strength, a certain thread length is required. The existing design does not fully utilize the axial space size. In addition, the contact surface between the nut and the flat washer also increases the risk of leakage, which can cause lubricating oil and oil gas to penetrate into the area where the strain gauge is attached along the axial direction of the threads.

[0005] To solve the above problems, a self-sealing self-locking nut is needed to overcome the above problems. UTILITY MODEL CONTENTS

[0006] The main purpose of the utility model is to provide a self-sealing self-locking nut that can effectively solve the problems in the background art.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows:

[0008] The utility model provides a self -sealing self -locking nut, including the inside of elastic element body is equipped with intermediate protective cover, is installed with the oil return pipe near one end of intermediate protective cover, one end of oil return pipe is penetrated with first outer protective cover, the middle part of other end of elastic element body is equipped with second outer protective cover, the middle part of second outer protective cover is equipped with oil injection pipe, one end of oil injection pipe is equipped with second O type sealing ring and sets with tight screw, the other end of oil injection pipe is equipped with oil injection pipe gasket, locking nut and first O type sealing ring, and first O type sealing ring is arranged between locking nut and oil injection pipe, the middle part of elastic element body is equipped with transmission shaft.

[0009] As the preferred scheme of the utility model, the locking nut comprises a non-standard designed nut body provided at one end of the oil injection pipe, O-rings are respectively provided at both sides of one end of the non-standard designed nut body, a polytetrafluoroethylene bushing is provided inside the other end of the non-standard designed nut body, a through groove is formed between one end close to the polytetrafluoroethylene bushing and the non-standard designed nut body, a hydraulic cylinder is provided inside one end of the through groove, a splicing block is provided on the lower side of the through groove, a moving block is spliced on the upper side of the splicing block, sliding blocks are respectively provided on the outer walls of both sides of the moving block, sliding grooves are embedded on the outer walls of the sliding blocks, a limiting groove is formed between the other end of the polytetrafluoroethylene bushing and the non-standard designed nut body, a spring is provided inside the limiting groove, and a clamping block is provided at one end of the spring.

[0010] As the preferred scheme of the utility model, the O-rings and the non-standard designed nut body are detachably installed, and the polytetrafluoroethylene bushing and the non-standard designed nut body are detachably installed.

[0011] As the preferred scheme of the utility model, the non-standard designed nut body is clamped with the through groove, the sliding blocks are fixedly connected with the moving block, and the sliding blocks are slidingly connected with the sliding grooves.

[0012] As the preferred scheme of the utility model, the hydraulic cylinder is fixedly connected with the through groove, and the splicing block is fixedly installed with the through groove.

[0013] As the preferred scheme of the utility model, the moving block is movably spliced with the splicing block, the spring is fixedly connected with the limiting groove, and the clamping block is fixedly connected with the spring.

[0014] As the preferred scheme of the utility model, the oil injection pipe and the elastic element body are detachably installed, the oil return pipe and the elastic element body are detachably installed, and the first outer protective cover and the elastic element body are detachably installed.

[0015] As the preferred scheme of the utility model, the second outer protective cover and the elastic element body are detachably installed, the intermediate protective cover and the elastic element body are detachably installed, and the locking nut and the oil injection pipe are detachably installed.

[0016] Beneficial effects

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In the utility model, the self-sealing self-locking nut is designed, the sealing effect of the non-standard designed nut body is increased by the polytetrafluoroethylene bushing and the O-shaped ring, the polytetrafluoroethylene bushing is pushed by the moving block pushed by the hydraulic cylinder, the spring is extruded by the polytetrafluoroethylene bushing, the polytetrafluoroethylene bushing is loosened, so that the polytetrafluoroethylene bushing is replaced conveniently, and the sealing effect of the torque measuring disc is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structural schematic diagram of the elastic element body of the utility model;

[0020] Figure 2 It is the analytic structural schematic diagram of the locking nut of the utility model;

[0021] Figure 3 It is the structural schematic diagram of A of the utility model;

[0022] Figure 4 It is the structural schematic diagram of B of the utility model.

[0023] In the drawing: 1, elastic element body; 2, intermediate protective cover; 3, first outer protective cover; 4, second outer protective cover; 5, oil injection pipe; 6, oil injection pipe gasket; 7, locking nut; 8, first O-shaped sealing ring; 9, second O-shaped sealing ring; 10, locking screw; 11, oil return pipe; 12, transmission shaft; 701, non-standard designed nut body; 702, polytetrafluoroethylene bushing; 703, O-shaped ring; 704, through slot; 705, sliding groove; 706, sliding block; 707, moving block; 708, hydraulic cylinder; 709, splicing block; 710, limiting groove; 711, spring; 712, clamping block. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described in combination with specific implementation manners.

[0025] For example, Figures 1-4As shown, a self-sealing self-locking nut, comprising an elastic element body 1, an intermediate protective cover 2 is arranged inside the elastic element body 1, an oil return pipe 11 is installed near one end of the intermediate protective cover 2, a first outer protective cover 3 is penetrated through one end of the oil return pipe 11, a second outer protective cover 4 is installed in the middle of the other end of the elastic element body 1, an oil injection pipe 5 is installed in the middle of the second outer protective cover 4, a second O-shaped sealing ring 9 and a locking screw 10 are installed at one end of the oil injection pipe 5, an oil injection pipe gasket 6, a locking nut 7 and a first O-shaped sealing ring 8 are installed at the other end of the oil injection pipe 5, and the first O-shaped sealing ring 8 is arranged between the locking nut 7 and the oil injection pipe 5, and a transmission shaft 12 is arranged in the middle of the elastic element body 1.

[0026] Please refer to the accompanying Figure 1 , the accompanying Figure 2 and the accompanying Figure 3 As shown, the locking nut 7 comprises a non-standard nut body 701 arranged at one end of the oil injection pipe 5, O-shaped rings 703 are arranged on both sides of one end of the non-standard nut body 701, a polytetrafluoroethylene bushing 702 is arranged inside the other end of the non-standard nut body 701, a through groove 704 is formed between one end near the polytetrafluoroethylene bushing 702 and the non-standard nut body 701, a hydraulic cylinder 708 is arranged inside one end of the through groove 704, a splicing block 709 is arranged on the lower side of the inside of the through groove 704, a moving block 707 is spliced on the upper side of the splicing block 709, sliding blocks 706 are arranged on the outer walls of both sides of the moving block 707, sliding grooves 705 are clamped on the outer walls of the sliding blocks 706, a limiting groove 710 is formed between the other end of the polytetrafluoroethylene bushing 702 and the non-standard nut body 701, a spring 711 is arranged inside the limiting groove 710, a clamping block 712 is arranged at one end of the spring 711, the O-shaped rings 703 and the non-standard nut body 701 are detachably installed, the polytetrafluoroethylene bushing 702 and the non-standard nut body 701 are detachably installed, the non-standard nut body 701 and the through groove 704 are clamped, the sliding blocks 706 and the moving block 707 are fixedly connected, the sliding blocks 706 and the sliding grooves 705 are slidingly connected, the hydraulic cylinder 708 and the through groove 704 are fixedly connected, the splicing block 709 and the through groove 704 are fixedly installed, the moving block 707 and the splicing block 709 are movably spliced, the spring 711 and the limiting groove 710 are fixedly connected, the clamping block 712 and the spring 711 are fixedly connected, the oil injection pipe 5 and the elastic element body 1 are detachably installed, the oil return pipe 11 and the elastic element body 1 are detachably installed, the first outer protective cover 3 and the elastic element body 1 are detachably installed, the second outer protective cover 4 and the elastic element body 1 are detachably installed, the intermediate protective cover 2 and the elastic element body 1 are detachably installed, and the locking nut 7 and the oil injection pipe 5 are detachably installed.

[0027] The middle part of the elastic element body 1 penetrates the transmission shaft 12, and the two ends thereof are respectively detachably installed with the first outer protective cover 3 and the second outer protective cover 4 through bolts, so as to form an outer protective layer.

[0028] The intermediate protective cover 2 is nested in the elastic element body 1, so as to isolate the transmission shaft and the lubricating system, and the protective covers are connected through clamping grooves, so as to facilitate disassembly and maintenance.

[0029] The oil injection pipe 5 penetrates the second outer protective cover 4, and the tail end thereof is fixed through a locking nut 7. The oil injection pipe 5 and the elastic element body 1 are provided with an oil injection pipe gasket 6 and a first O-shaped sealing ring 8, so as to ensure oil path sealing.

[0030] The oil return pipe 11 penetrates the first outer protective cover 3 and communicates with the intermediate protective cover 2, so as to form a lubricating oil circulation loop.

[0031] The non-standard designed nut body 701 is embedded with a polytetrafluoroethylene bushing 702 which is high-temperature resistant and corrosion resistant. The bushing and the nut body are elastically clamped through the spring 711 and the clamping block 712 in the limiting groove 710, so as to realize axial pre-tightening.

[0032] The hydraulic cylinder 708 is fixed in the through groove 704, the piston rod of which is connected with the moving block 707. The moving block is slidably guided through the sliding block 706 and the sliding groove 705 on both sides, so as to push the polytetrafluoroethylene bushing 702 to compress the spring 711.

[0033] The utility model discloses a work flow: use the self -sealing self -locking nut of this scheme design, in working time, the nut body 701 of non -standard design fuses the structural form of nut and seal flat pad, adopts fine thread, and the thread starts processing from the big end face, only need to guarantee the axial length of certain thread intensity, shorten the distance of non -standard gasket, adopt the structural form of whole type, also avoid the risk of unreliable sealing of the middle flat pad and locking nut 7 end face, ensure that O type ring 703 can reliably in the O type ring groove in the process of installation and tightening, avoid the O type ring 703 from the O type ring groove in the installation process, cause O type ring to be pressed down or cut off, lead to unreliable sealing, and the polytetrafluoroethylene bushing 702 with non -standard design nut body 701 adopts the same stamping assembly process path of ordinary self -locking nut, and the polytetrafluoroethylene bushing 702 is stamped and assembled after the tapping of non -standard design nut body 701 is completed, and the polytetrafluoroethylene bushing 702 is not processed with thread, and the polytetrafluoroethylene bushing 702 sleeve inner diameter is same with the nominal size of fuel injection pipe 5 thread inner diameter, adopts the fit size of H6, when fuel injection pipe 5 is tightened through the polytetrafluoroethylene bushing 702, the polytetrafluoroethylene bushing 702 inner ring is formed by bolt extrusion Thread tight fit, and the polytetrafluoroethylene bushing 702 outer ring is also tight fit with non -standard design nut body 701, thereby forming reliable radial seal, and the width size of polytetrafluoroethylene bushing 702 is 1.25-1.5 times of the pitch, which can meet the demand of reliable sealing, and can control the axial size of structure as much as possible, the polytetrafluoroethylene bushing 702 inner ring is formed by bolt extrusion Thread tight fit, and the structure has the function of self -locking, the hydraulic cylinder 708 is controlled by the external controller Control extension, and the slider 706 of the moving block 707 outer wall of one end is lifted along the slide groove 705 inner wall, thereby pushing the polytetrafluoroethylene bushing 702 to move up, and the other end of the polytetrafluoroethylene bushing 702 extrudes the clamping block 712, so that the clamping block 712 extrudes the spring 711, so that it shrinks, thereby facilitating the polytetrafluoroethylene bushing 702 to be taken out, facilitating replacement operation, and facilitating the effect of polytetrafluoroethylene bushing 702.

[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A self-sealing self-locking nut comprising an elastomeric element body (1), characterized in that: The inside of the elastic element body (1) is provided with an intermediate protective cover (2), an oil return pipe (11) is installed near one end of the intermediate protective cover (2), one end of the oil return pipe (11) penetrates a first outer protective cover (3), the other end of the elastic element body (1) is provided with a second outer protective cover (4), the middle of the second outer protective cover (4) is provided with an oil injection pipe (5), one end of the oil injection pipe (5) is provided with a second O-shaped sealing ring (9) and a locking screw (10), the other end of the oil injection pipe (5) is provided with an oil injection pipe gasket (6), a locking nut (7) and a first O-shaped sealing ring (8), and the first O-shaped sealing ring (8) is arranged between the locking nut (7) and the oil injection pipe (5), and the middle of the elastic element body (1) is provided with a transmission shaft (12).

2. A self-sealing, self-locking nut according to claim 1, wherein: The locking nut (7) comprises a non-standard nut body (701) arranged at one end of the oil injection pipe (5), O-shaped rings (703) are arranged on both sides of one end of the non-standard nut body (701), a polytetrafluoroethylene bushing (702) is arranged inside the other end of the non-standard nut body (701), a through groove (704) is formed between one end of the polytetrafluoroethylene bushing (702) and the non-standard nut body (701), a hydraulic cylinder (708) is arranged inside one end of the through groove (704), a splicing block (709) is arranged on the lower side of the inside of the through groove (704), a moving block (707) is spliced on the upper side of the splicing block (709), sliding blocks (706) are arranged on the outer walls of both sides of the moving block (707), sliding grooves (705) are clamped on the outer walls of the sliding blocks (706), a limiting groove (710) is formed between the other end of the polytetrafluoroethylene bushing (702) and the non-standard nut body (701), a spring (711) is arranged inside the limiting groove (710), and a clamping block (712) is arranged at one end of the spring (711).

3. A self-sealing, self-locking nut according to claim 2, wherein: The O-shaped ring (703) and the non-standard nut body (701) are detachably installed, and the polytetrafluoroethylene bushing (702) and the non-standard nut body (701) are detachably installed.

4. A self-sealing, self-locking nut as defined in claim 2, wherein: The non-standard nut body (701) and the through groove (704) are clamped, the sliding block (706) and the moving block (707) are fixedly connected, and the sliding block (706) and the sliding groove (705) are slidingly connected.

5. A self-sealing, self-locking nut as defined in claim 2, wherein: The hydraulic cylinder (708) and the through groove (704) are fixedly connected, and the splicing block (709) and the through groove (704) are fixedly installed.

6. A self-sealing, self-locking nut as defined in claim 2, wherein: The moving block (707) and the splicing block (709) are movably spliced, the spring (711) and the limiting groove (710) are fixedly connected, and the clamping block (712) and the spring (711) are fixedly connected.

7. A self-sealing, self-locking nut as defined in claim 1, wherein: The oil injection pipe (5) and the elastic element body (1) are detachably installed, the oil return pipe (11) and the elastic element body (1) are detachably installed, and the first outer protective cover (3) and the elastic element body (1) are detachably installed.

8. A self-sealing, self-locking nut according to claim 1, wherein: The second outer protective cover (4) is detachably installed with the elastic element body (1), the intermediate protective cover (2) is detachably installed with the elastic element body (1), and the locking nut (7) is detachably installed with the oil injection pipe (5).

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