High-torque gearbox fitting bolt suitable for small-space installation

Abstract

The utility model discloses a high-torque gearbox fitting bolt suitable for small-space installation, and relates to the technical field of bolts. The device comprises a screw rod, the top end of the screw rod is fixedly connected with a nut, and the surface of the screw rod is in threaded connection with a nut; a limiting assembly is arranged at the top of an inner cavity of the screw and comprises expansion plates, the expansion plates are movably connected to the two sides of the top of the inner cavity of the screw, the bottoms of one sides of the expansion plates are fixedly connected with limiting blocks, the surfaces of the limiting blocks are sleeved with reset springs, and the top of the inner cavity of the screw is rotationally connected with a conical threaded sleeve piece. The contact area of the nut and the surface of the screw can be increased through the nut extrusion gasket, pressure is dispersed, the nut is prevented from loosening as much as possible, the expansion plate is extruded by the conical screw sleeve by screwing the rotating rod, and the limiting block is moved to the outside of the screw through rotation of the expansion plate, so that the nut is limited, and the fastening effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolts, and particularly relates to a high-torque gearbox tight-fitting bolt suitable for installation in a small space. Background Art

[0002] High torque gearbox clamping bolts: usually refers to gearboxes specially designed for installation in small spaces. Their clamping bolts are bolts that can provide high torque transmission and are suitable for compact installation. These bolts usually have high strength and durability, and can provide reliable connection and torque transmission in limited space. They are usually used in mechanical equipment that requires small space design, such as industrial machinery, automobiles, and aerospace equipment.

[0003] In the prior art, when installing the high torque gearbox tightening bolts on the surface of the high torque gearbox in a small space, it is usually necessary to ensure that the tightening bolts will not loosen after long-term use. The existing tightening bolts are usually achieved by gaskets. When the temperature difference on the surface of the high torque gearbox is large, thermal expansion and contraction are prone to occur, resulting in reduced tightening effect of the gasket, causing the tightening bolts to loosen, which may bring safety hazards. To this end, we provide a high torque gearbox tightening bolt suitable for small space installation to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a high-torque gearbox tightening bolt suitable for installation in a small space. Through the coordinated arrangement of a limit assembly and a fastening assembly, the problem of high-torque gearbox tightening bolts in the prior art being prone to loosening due to various conditions after long-term use is solved.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a high-torque gearbox tight-fitting bolt suitable for installation in a small space, comprising a screw rod, a nut is fixedly connected to the top of the screw rod, and a nut is threadedly connected to the surface of the screw rod;

[0007] A limit assembly is provided at the top of the screw cavity, and the limit assembly includes an expansion plate, which is movably connected to both sides of the top of the screw cavity, a limit block is fixedly connected to the bottom of one side of the expansion plate, a return spring is sleeved on the surface of the limit block, and a conical screw sleeve is rotatably connected to the top of the screw cavity, and the surface of the conical screw sleeve is threadedly connected to one side of the expansion plate;

[0008] A fastening assembly is provided at the bottom of the nut, and the fastening assembly includes a locking plate, which is fixed to the bottom of the nut. Tension springs are fixedly connected to both sides of the inner cavity of the locking plate, one end of the tension spring is fixedly connected to a telescopic plate, and a gasket is fixedly connected to the bottom of the telescopic plate.

[0009] The utility model is further configured that a hexagonal hole is opened in the inner cavity of the nut, a rotating rod is fixedly connected to the top end of the conical screw sleeve, and a screwing hole is opened in the top of the inner cavity of the rotating rod.

[0010] The utility model is further configured such that circular holes are provided on both sides of the inner cavity of the locking plate, the top of the tension spring is fixed to the top of the inner cavity of the circular hole, and the bottom end of the telescopic plate is fixed to one side of the top of the gasket through the bottom of the inner cavity of the circular hole.

[0011] The utility model is further configured that a smooth surface is provided on the top of the screw surface, extension grooves are provided on both sides of the top of the screw inner cavity, and one side of the limit block is slidably connected to the inner cavity of the extension groove.

[0012] The utility model is further configured that a circular groove is provided on the top of the inner cavity of the screw rod, a thread is provided in the inner cavity of the circular groove, and one side of the surface of the conical screw sleeve is connected with the inner cavity of the circular groove thread.

[0013] The utility model is further configured that a spiral line is provided on one side of the expansion plate, and the surface of the conical screw sleeve is threadedly connected with the one side of the expansion plate through the spiral line.

[0014] The utility model is further configured that the material of the gasket is copper, and the bottom end is in contact with the top of the nut.

[0015] The utility model is further configured that a slide groove is provided in the inner cavity of the locking plate, and the surface of the rotating rod is slidably connected with the inner cavity of the slide groove.

[0016] The utility model has the following beneficial effects:

[0017] 1. The utility model can increase the contact area between the nut and the screw surface by squeezing the gasket with the nut, disperse the pressure and prevent the nut from loosening as much as possible. By twisting the rotating rod, the conical screw sleeve squeezes the expansion plate, and the limit block is moved to the outside of the screw by rotating the expansion plate, so as to limit the nut and achieve a tightening effect.

[0018] 2. The utility model can drive the limit block to move through the setting of the expansion plate, so as to limit the nut and prevent the tight-fitting bolt from loosening. Through the setting of the reset spring, the limit block can be driven to move toward the inside of the screw to prevent the nut from being inconvenient to install. Through the setting of the conical screw sleeve, the expansion plate can be driven to rotate to drive the limit block to move. Through the setting of the telescopic plate, the gasket can be brought into contact with the locking plate to lock the nut.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A structural stereogram of a high-torque gearbox tightening bolt suitable for installation in a small space.

[0022] Figure 2 The schematic diagram is a structural diagram of a locking plate and a gasket in a high-torque gearbox tightening bolt suitable for installation in a small space.

[0023] Figure 3 The cross-sectional view is of a locking plate in a high-torque gearbox tightening bolt suitable for installation in a small space.

[0024] Figure 4 Schematic diagram of a tension spring in a high torque gearbox tightening bolt suitable for installation in a small space.

[0025] Figure 5 The cross-sectional view is of a screw rod in a high-torque gearbox tightening bolt suitable for installation in a small space.

[0026] Figure 6 A high torque gearbox bolt suitable for installation in small spaces Figure 3 A is an enlarged view of the middle image.

[0027] In the accompanying drawings: 1. screw rod; 101. nut; 102. nut; 2. limit assembly; 201. expansion plate; 202. limit block; 203. return spring; 204. conical screw sleeve; 3. fastening assembly; 301. locking plate; 302. tension spring; 303. telescopic plate; 304. gasket; 4. rotating rod; 5. circular groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] For specific embodiment 1, please refer to Figure 1-6The utility model is a high torque gearbox tight fitting bolt suitable for installation in a small space, comprising a screw rod 1, a nut 101 is fixedly connected to the top of the screw rod 1, and a nut 102 is threadedly connected to the surface of the screw rod 1;

[0030] A limit assembly 2 is provided at the top of the inner cavity of the screw 1. The limit assembly 2 includes an expansion plate 201, which is movably connected to both sides of the top of the inner cavity of the screw 1. A limit block 202 is fixedly connected to the bottom of one side of the expansion plate 201. A return spring 203 is sleeved on the surface of the limit block 202. A conical screw sleeve 204 is rotatably connected to the top of the inner cavity of the screw 1. The surface of the conical screw sleeve 204 is threadedly connected to one side of the expansion plate 201.

[0031] A fastening assembly 3 is provided at the bottom of the nut 101, and the fastening assembly 3 includes a locking plate 301, which is fixed to the bottom of the nut 101, and tension springs 302 are fixedly connected to both sides of the inner cavity of the locking plate 301, one end of the tension spring 302 is fixedly connected to a telescopic plate 303, and a gasket 304 is fixedly connected to the bottom of the telescopic plate 303.

[0032] Specifically: the expansion plates 201 are arranged on both sides of the top of the inner cavity of the screw 1, and there are two of them. One end of the reset spring 203 is fixed to the bottom of one side of the expansion plate 201, and the other end is fixed to the inner wall of the top of the inner cavity of the screw 1. The initial state of the expansion plate 201 is set from the top of the inner cavity of the screw 1 to the center of the inner cavity of the screw 1 to avoid hindering the installation of the nut 102. The top of the tension spring 302 is fixed to one side of the top of the inner cavity of the locking plate 301, and the other end is fixed to the bottom end of the telescopic plate 303 to facilitate the telescopic plate 303 to be telescopic.

[0033] For specific embodiment 2, please refer to Figure 1-6 On the basis of the specific embodiment 1, a hexagonal hole is opened in the inner cavity of the nut 101, a rotating rod 4 is fixedly connected to the top of the conical screw sleeve 204, a screwing hole is opened in the top of the inner cavity of the rotating rod 4, circular holes are set on both sides of the inner cavity of the locking plate 301, the top of the tension spring 302 is fixed to the top of the inner cavity of the circular hole, the bottom end of the telescopic plate 303 is fixed to one side of the top of the gasket 304 through the bottom of the inner cavity of the circular hole, a smooth surface is opened on the top of the surface of the screw 1, and extension grooves are opened on both sides of the top of the inner cavity of the screw 1, and one side of the limit block 202 is slidably connected to the inner cavity of the extension groove.

[0034] Specifically: the hexagonal hole allows the inner cavity of the nut 101 to be rotatably connected to the rotating rod 4. After the bolt is installed, the conical screw sleeve 204 can squeeze the expansion plate 201 to facilitate the movement of one side of the limit block 202 to the outside of the screw rod 1. The purpose of setting the screwing hole at the top of the inner cavity of the rotating rod 4 is to facilitate the screwing of the conical screw sleeve 204. The circular holes are set on both sides of the inner cavity of the locking plate 301. The top of the inner cavity of the circular hole does not extend outside the locking plate 301, and the bottom of the inner cavity extends to the outside of the locking plate 301. The extension groove allows the limit block 202 to extend outside the screw rod 1.

[0035] For specific embodiment 3, please refer to Figure 1-6 On the basis of the first and second specific embodiments, a circular groove 5 is provided at the top of the inner cavity of the screw rod 1, a thread is provided at the inner cavity of the circular groove 5, one side of the surface of the conical screw sleeve 204 is threadedly connected to the inner cavity of the circular groove 5, a spiral line is provided at one side of the expansion plate 201, and the surface of the conical screw sleeve 204 is threadedly connected to one side of the expansion plate 201 through the spiral line. The gasket 304 is made of copper, and the bottom end is in contact with the top of the nut 102. A sliding groove is provided in the inner cavity of the locking plate 301, and the surface of the rotating rod 4 is slidably connected to the inner cavity of the sliding groove.

[0036] Specifically: the circular groove 5 allows the conical screw sleeve 204 to move into the inner cavity of the screw rod 1, preventing the limit block 202 from extending too short a distance and failing to limit the nut 102. The threaded line on one side of the expansion plate 201 enables the conical screw sleeve 204 to be threadedly connected to one side of the expansion plate 201, which is convenient for squeezing the expansion plate 201. The copper gasket 304 has a certain corrosion resistance, which prevents the gasket 304 from oxidizing and increases the service life of the gasket 304. The slide groove allows the rotating rod 4 to slide in the inner cavity of the nut 101, so that the bolt and the conical screw sleeve 204 will not rotate at the same time.

[0037] The working principle of the utility model is as follows: when it is necessary to install the tight-fitting bolt on the surface of a high-torque gearbox in a small space, first align one end of the screw rod 1 with the inner cavity of the screw hole, and then screw the nut 102 to one side of the surface of the screw rod 1. When it is screwed to the top of the surface of the screw rod 1, the gasket 304 will be squeezed, and the gasket 304 will squeeze the telescopic rod, and the telescopic rod will drive the tension spring 302 to contract, so as to install the nut 102 on the surface of the tight-fitting bolt, and then rotate the rotating rod 4, and the rotating rod 4 will drive the conical screw sleeve 204 to move, and the conical screw sleeve 204 will squeeze the expansion plate 201. The rotation angle of the expansion plate 201 drives the limit block 202 to move, and the limit block 202 extends to the outside of the screw rod 1 through the inner cavity of the extension groove, so as to limit the nut 102.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high torque gearbox tightening bolt suitable for installation in a small space, comprising a screw rod (1), characterized in that: A nut (101) is fixedly connected to the top of the screw rod (1), and a nut (102) is threadedly connected to the surface of the screw rod (1); A limit assembly (2) is provided at the top of the inner cavity of the screw rod (1), the limit assembly (2) comprising an expansion plate (201), the expansion plate (201) being movably connected to both sides of the top of the inner cavity of the screw rod (1), a limit block (202) being fixedly connected to the bottom of one side of the expansion plate (201), a return spring (203) being sleeved on the surface of the limit block (202), a conical screw sleeve (204) being rotatably connected to the top of the inner cavity of the screw rod (1), and a surface of the conical screw sleeve (204) being threadedly connected to one side of the expansion plate (201); A fastening assembly (3) is provided at the bottom of the nut (101), and the fastening assembly (3) comprises a locking plate (301), the locking plate (301) is fixed to the bottom of the nut (101), both sides of the inner cavity of the locking plate (301) are fixedly connected to tension springs (302), one end of the tension spring (302) is fixedly connected to a telescopic plate (303), and the bottom of the telescopic plate (303) is fixedly connected to a gasket (304).

2. The high torque gearbox tightening bolt suitable for installation in a small space according to claim 1, characterized in that: The inner cavity of the nut (101) is provided with a hexagonal hole, the top end of the conical screw sleeve (204) is fixedly connected to a rotating rod (4), and the inner cavity top of the rotating rod (4) is provided with a screwing hole.

3. The high torque gearbox tightening bolt suitable for installation in a small space according to claim 1, characterized in that: Circular holes are provided on both sides of the inner cavity of the locking plate (301), the top end of the tension spring (302) is fixed to the top of the inner cavity of the circular hole, and the bottom end of the telescopic plate (303) is fixed to one side of the top of the gasket (304) through the bottom of the inner cavity of the circular hole.

4. The high torque gearbox tightening bolt suitable for installation in a small space according to claim 1, characterized in that: The top of the surface of the screw rod (1) is provided with a smooth surface, and both sides of the top of the inner cavity of the screw rod (1) are provided with extension grooves, and one side of the limit block (202) is slidably connected to the inner cavity of the extension groove.

5. The high torque gearbox tightening bolt suitable for installation in a small space according to claim 1, characterized in that: A circular groove (5) is provided at the top of the inner cavity of the screw rod (1), a thread is provided in the inner cavity of the circular groove (5), and one side of the surface of the conical screw sleeve (204) is threadedly connected to the inner cavity of the circular groove (5).

6. The high torque gearbox tightening bolt suitable for installation in a small space according to claim 1, characterized in that: A spiral line is provided on one side of the expansion plate (201), and a surface of the conical screw sleeve (204) is threadedly connected to the one side of the expansion plate (201) via the spiral line.

7. The high torque gearbox tightening bolt suitable for installation in a small space according to claim 1, characterized in that: The gasket (304) is made of copper, and its bottom end is in contact with the top of the nut (102).

8. The high torque gearbox tightening bolt suitable for installation in a small space according to claim 2, characterized in that: The inner cavity of the locking plate (301) is provided with a sliding groove, and the surface of the rotating rod (4) is slidably connected to the inner cavity of the sliding groove.

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