Clamping Device

Abstract

To provide a clamping device capable of preventing loosening due to vibration. [Solution] The present invention includes a first clamp (10), a second clamp (20) having a third end rotatably connected to the first end of the first clamp, a bolt portion (30) rotatably connected to the second end of the first clamp, a nut portion (40) fastened to the bolt portion, and a first elastic member disposed on the nut portion and enveloping the bolt portion, and can prevent loosening of the first clamp and second clamp due to vibration.

Description

[Technical Field]

[0001] The present invention relates to a clamping device, and more particularly to a clamping device that can prevent loosening due to vibration or the like. [Background technology]

[0002] Generally, bolts and nuts are fastened together by an insertion fastening method and have long been widely used as components for connecting or fastening building materials, machine parts, etc. due to their simple operation and strong fastening force. However, there is a problem that the fastening can become loose due to repeated vibration, thermal expansion, etc. Therefore, bolts and nuts used in clamping devices also have the problem of becoming loose due to vibration, etc. Summary of the Invention [Problem to be solved by the invention]

[0003] An object of one embodiment of the present invention is to provide a clamping device that can prevent loosening due to vibration. [Means for solving the problem]

[0004] In order to achieve the above-mentioned object, a clamping device according to one embodiment of the present invention is characterized by including a first clamp, a second clamp having a third end rotatably connected to a first end of the first clamp, a bolt portion rotatably connected to the second end of the first clamp, a nut portion fastened to the bolt portion, and a first elastic member disposed on the nut portion and enclosing the bolt portion. [Effects of the Invention]

[0005] According to the present invention, it is possible to prevent the nut portion from loosening (rotating) due to vibration, and also to prevent the first clamp and the second clamp from being disconnected due to vibration. [Brief explanation of the drawings]

[0006] [Figure 1]1 is a perspective view schematically illustrating a clamping device according to an embodiment of the present invention; [Figure 2] FIG. 2 is a diagram schematically illustrating a second end and a fourth end shown in FIG. [Figure 3] FIG. 2 is a diagram schematically illustrating a front view of the clamping device shown in FIG. [Figure 4] 3 is a schematic diagram of an embodiment of the bolt portion shown in FIG. 2. FIG. [Figure 5] 2 is a diagram schematically illustrating an embodiment of the stopping portion shown in FIG. 1. FIG. [Figure 6] 2 is a diagram schematically illustrating one surface of the fixed washer shown in FIG. 1. FIG. [Figure 7] 7 is a diagram schematically illustrating another surface of the fixed washer shown in FIG. 6. FIG. [Figure 8] 8A to 8C are schematic diagrams illustrating various embodiments of the fixing washer shown in FIG. 7. [Figure 9] 9 is a schematic view of another embodiment of the fixed washer shown in FIG. 8. FIG. [Figure 10] FIG. 2 is a diagram schematically illustrating an embodiment of the display unit shown in FIG. [Figure 11] 5A and 5B are diagrams showing another embodiment of the bolt portion and the nut portion shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0007] The same reference numerals throughout the specification refer to substantially the same components. In the following description, detailed descriptions of structures and functions that are not related to the core structure of the present invention or that are well known in the technical field of the present invention may be omitted.

[0008] Furthermore, the features of the various embodiments of the present invention can be partially or fully combined or combined with each other, and various technical interlocking and driving mechanisms are possible, and each embodiment can be implemented independently of each other, or can be implemented together in association with each other.

[0009] A clamping device 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0010] FIG. 1 is a perspective view schematically illustrating a clamping device 1 according to one embodiment of the present invention, FIG. 2 is a view schematically illustrating the second end 110 and the fourth end 210 shown in FIG. 1, FIG. 3 is a view schematically illustrating the front of the clamping device 1 shown in FIG. 1, and FIG. 4 is a view schematically illustrating one embodiment of the bolt portion 30 shown in FIG. 2.

[0011] 1 to 4, a clamping device 1 according to one embodiment of the present invention includes a first clamp 10, a second clamp 20, a bolt portion 30, a nut portion 40, and a first elastic member 50. The first clamp 10 may be rotatably connected to the second clamp 20. For example, a first end portion 100 of the first clamp 10 may be hingedly connected to one side of a connecting piece 4. The other side of the connecting piece 4 may be hingedly connected to a third end portion 200 of the second clamp 20.

[0012] The first clamp 10 may extend in an arc from a first end 100 to a second end 110 spaced apart from the first end 100. The second clamp 20 has a third end 200 rotatably connected to the first clamp 10 or the connecting piece 4. The second clamp 20 may extend in an arc from the third end 200 to a fourth end 210 spaced apart from the third end 200. The first clamp 10 and the second clamp 20 may be coupled to each other by enveloping the pipe 2 or a flange of the pipe 2. The bolt portion 30 is rotatably connected to the second end 110 of the first clamp 10. The nut portion 40 is fastened to the bolt portion 30. The first elastic member 60 is disposed on the nut portion 40. The first elastic member 60 may envelop the bolt portion 30 as the bolt portion 30 rotates. The first elastic member 60 may be wound around the inner circumferential surface of the nut portion 40. The first elastic member 60 may prevent the bolt portion 30 from rotating when the bolt portion 30 rotates. Therefore, rotation of the bolt portion 30 due to vibration can be suppressed, and loosening of the bolt portion 30 can be prevented.

[0013] The second clamp 20 has a fourth end 210 spaced apart from the third end 200. The first clamp 10 and the second clamp 20 rotate so that the second end 110 of the first clamp 10 and the fourth end 210 of the second clamp 20 face each other and are coupled together. The first clamp 10 and the second clamp 20 have an outer circumferential surface 3 that extends with a first curvature R1.

[0014] The second end 110 may include a second end surface 111 and a rounded surface 112. The second end surface 111 faces the fourth end 210. The rounded surface 112 extends from the second end surface 111 to the outer peripheral surface 3 of the first clamp 10. The rounded surface 112 may have a second curvature R2 greater than the first curvature R1. For example, the planar rotation shaft 300 may be disposed between the end of the rounded surface 112 connected to the first clamp 10 and the end of the rounded surface 112 connected to the second end surface 111. This allows the bolt portion 30 to easily rotate along the rounded surface 112 while coupled with the washer 70 (described later). This facilitates coupling and decoupling between the first clamp 10 and the second clamp 20.

[0015] The fourth end 210 may include a fourth end surface 211, a first fastening groove 212, a fastening portion 213, and a protrusion 214. The fourth end surface 211 faces the second end 110. That is, the fourth end surface 211 may face the second end surface 111. The first fastening groove 212 may extend from the fourth end surface 211 along a direction from the second end surface 111 toward the fourth end surface 211. The fastening portion 213 defines the first fastening groove 212 and may surround the bolt portion 30. The fastening portion 213 may have a curved surface corresponding to the outer circumferential surface (diameter) of the bolt portion 30. The protrusion 214 protrudes from an upper end of the fastening portion 213 along a direction from the second end surface 111 toward the fourth end surface 211. The protrusion 214 may support a fixing washer 80 (described later) to support the bolt portion 30.

[0016] The fastening portion 213 may include a support surface 2131 and a fastening surface 2132. The support surface 2131 can surround the bolt portion 30 inserted into the first fastening groove 212. The fastening surface 2132 extends from the support surface 2131 in the radial direction of the bolt portion 30. The fastening surface 2132 faces the fourth end surface 211. The fastening surface 2132 can come into contact with one surface of the fixing washer 80, which will be described later.

[0017] The washer 70 surrounds the bolt portion 30. The washer 70 is disposed between the second end surface 111 and the fourth end surface 211. The washer 70 prevents contact between the second end surface 111 and the fourth end surface 211, which come closer when the nut portion 40 is fastened, and can improve durability. The washer 70 can also elastically support the second end surface 111 and the fourth end surface 211.

[0018] The fixing washer 80 surrounds the bolt portion 30. The fixing washer 80 is disposed between the fastening surface 2132 and the nut portion 40. The fixing washer 80 increases the frictional force between the fastening surface 2132 and the front end surface 403 of the nut portion 40, thereby preventing the nut portion 40 from loosening.

[0019] The bolt portion 30 may include a threaded portion 310, an inclined portion 320, and a rotating shaft 330. The rotating shaft 330 is rotatably connected to a rotating shaft 300 disposed in the first clamp 10. The threaded portion 310 is disposed at an end of the rotating shaft 330. The threaded portion 310 includes a thread and a screw groove for screw fastening. The threaded portion 310 may be coupled to the nut portion 40. The inclined portion 320 may be disposed on the rotating shaft 330. The inclined portion 320 is disposed between the threaded portion 310 and the rotating shaft 300. The inclined portion 320 may have a diameter that increases from the threaded portion 310 toward the rotating shaft 300. The inclined portion 320 can be gradually inserted into the through hole of the fixing washer 80 by rotating the high nut portion 40. This positions the fixing washer 80 and allows the fixing washer 80 to stably contact the fastening surface 2132.

[0020] FIG. 5 is a diagram schematically illustrating an embodiment of the stopping portion 50 shown in FIG.

[0021] 4 and 5, the nut portion 40 includes a stopping protrusion 400, a polygonal fastening portion 401, and a stopping groove 402. The stopping protrusion 400 extends along the longitudinal direction of the bolt portion 30. The multiple stopping protrusions 400 may be spaced apart in the circumferential direction along the outer circumferential surface of the nut portion 40. The stopping groove 402 is disposed between the multiple stopping protrusions 400. The polygonal fastening portion 401 may be disposed at an end of the stopping protrusion 400. The polygonal fastening portion 401 may be coupled with a fastening tool to fasten the nut portion 40. The first elastic member 60 may be disposed on the inner circumferential surface of the polygonal fastening portion 401.

[0022] The clamping device 1 according to the present invention may further include a stopping portion 50. The stopping portion 50 is coupled to the stopping protrusions 400. The stopping portion 50 includes a stopping ball 500 and a second elastic member 501. The stopping ball 500 is disposed in the second clamp 20 and may be disposed between the plurality of stopping protrusions 400. The second elastic member 501 is connected to the stopping ball 500. The second elastic member 501 may bias the stopping ball 500 toward the nut portion 40.

[0023] The plurality of stopping grooves 402 are disposed between the plurality of stopping protrusions 400. The stopping grooves 402 may be recessed from the outer circumferential surface of the nut portion 40 toward the inside of the nut portion 40. The stopping grooves 402 may have a curved surface with a third curvature R3. The third curvature R3 corresponds to the diameter of the stopping ball 500. The stopping ball 500 can be inserted into the stopping grooves 402 by rotating the nut portion 40. Therefore, loosening of the nut portion 40 can be prevented.

[0024] 6 is a diagram schematically showing one side of the fixed washer 80 shown in FIG. 1, FIG. 7 is a diagram schematically showing the other side of the fixed washer 80 shown in FIG. 6, FIG. 8 is a diagram schematically showing various embodiments of the fixed washer 80 shown in FIG. 7, and FIG. 9 is a diagram schematically showing another embodiment of the fixed washer 80 shown in FIG. 8.

[0025] 1 and 6 to 9, fixed washer 80 may include protrusions 801 and uneven portions 802. Protrusions 801 are disposed on one surface of fixed washer 80. Uneven portions 802 are disposed on the other surface of fixed washer 80.

[0026] The plurality of protrusions 801 may be arranged in sequence along the circumferential direction. The protrusions 801 may have a height that gradually increases along the circumferential direction. That is, the protrusions 801 may have an inclined surface that gradually increases in height along the circumferential direction. The plurality of concave and convex portions 802 may be arranged in sequence along the circumferential direction.

[0027] In one embodiment, the uneven portion 802 may have an inclined surface that gradually becomes higher in the circumferential direction. In another embodiment, one of the pair of uneven portions 802 may have a first inclined surface that gradually becomes higher in the clockwise direction. The other of the pair of uneven portions 802 may have a second inclined surface that gradually becomes lower in the clockwise direction. In still another embodiment, the uneven portion 802 may have a concave portion and a convex portion. The convex portion may have a thickness greater than the concave portion.

[0028] The fixed washer 80 also includes a first fixed washer 800 and a second fixed washer 810. One surface of the first fixed washer 800 can be coupled to one surface of the second fixed washer 810 so as to contact the first fixed washer 800. At this time, the uneven portion 802 of the first fixed washer 800 can mesh with the uneven portion 802 of the second fixed washer 800. The protrusions 801 of the first fixed washer 800 contact the fastening surface 2132. The protrusions 801 of the second fixed washer 810 contact the front end surface 403 of the nut portion 40. This increases frictional force and prevents rotation (loosening) of the nut portion 40. In one embodiment, the number of protrusions 801 may be three times or more the number of uneven portions 802. This increases the joining force between the first fixed washer 800 and the second fixed washer 810, and increases the frictional force between the fastening surface 2132 and the front end surface 403.

[0029] FIG. 10 is a diagram schematically illustrating an embodiment of the display unit 90 shown in FIG.

[0030] 10, the clamping device 1 according to the present invention may further include a display unit 90. The display unit 90 is disposed at an end of the bolt unit 30. The display unit 90 may be exposed to the outside of the nut unit 40 as the nut unit 40 is rotated. The display unit 90 may have a plurality of lines 900 extending in the circumferential direction. The plurality of lines 900 may have different colors. This makes it easy to check the degree of tightening and torque of the nut unit 40 using a tightening tool.

[0031] In one embodiment, the line 900 may include a first line 910, a second line 920, and a third line 930. As the nut portion 40 is rotated (tightened), the first line 910, the second line 920, and the third line 930 may be sequentially exposed to the outside of the nut portion 40. The initial tightening direction of the nut portion 40 may be confirmed by the first line 910. The tightening degree of the nut portion 40 may be confirmed by the second line 920. The second line 920 has a different color from the first line 910. This allows the tightening degree of the nut portion 40 to be easily confirmed even in a dark work space, etc. The third line 930 allows the tightening torque and limit torque of the nut portion 40 to be confirmed. This allows the nut portion 40 to be tightened with the appropriate torque. The third line 930 may have a different color from the second line 920. This allows the nut portion 40 to be tightened with the appropriate torque even in a dark work space, etc.

[0032] FIG. 11 is a view showing another embodiment of the bolt portion 30 and the nut portion 40 shown in FIG.

[0033] Referring to FIG. 11 , the bolt portion 30 has a bolt thread and a bolt thread groove. The nut portion 40 has a nut thread and a nut thread groove. In one embodiment, the bolt thread 311 is symmetrical with respect to a second central axis L2 on the cross section. The bolt thread 311 has a second angle a2 with respect to the second central axis L2. That is, the bolt thread 311 can be inclined at the second angle a2. The nut thread groove 404 is symmetrical with respect to a first central axis L1. The nut thread groove 404 has a first angle a1 with respect to the first central axis L1. That is, the nut thread groove 404 can be inclined at the first angle a1. Here, either the first angle a1 or the second angle a2 can be larger than the other. This increases the contact area between the bolt portion 30 and the nut portion 40, thereby suppressing loosening due to vibration.

[0034] For example, the first angle a1 may be greater than the second angle a2. When the first angle a1 is greater than the second angle a2, the contact area at the upper end of the bolt thread 311 can be increased. Also, the second angle a2 may be greater than the first angle a1. When the second angle a2 is greater than the first angle a1, the contact area at the lower end of the bolt thread 311 can be increased. Preferably, the first angle a1 and the second angle a2 may have a difference of 1 to 2 degrees.

[0035] The invention made by the inventor has been specifically described above using the above-mentioned embodiment, but it goes without saying that the present invention is not limited to the above-mentioned embodiment and can be modified in various ways without departing from the spirit of the invention. [Explanation of symbols]

[0036] 10 First clamp 20 Second clamp 30 Bolt section 40 Nut 50 Stopping section 60 First elastic member 70 Washer 80 Fixed washer 90 Display section 100 1st end 110 Second end 111 Second end surface 112 Rounded Surface 200 3rd end 210 4th end 211 4th end surface 212 1st fastening groove 213 Fastening part 214 Protrusion 400 Stopping protrusion 500 Stopping Balls 501 second elastic member 900 lines 2131 Support surface 2132 Fastening surface R1 1st curvature R2 2nd curvature

Claims

1. A first clamp; a second clamp having a third end pivotally coupled to the first end of the first clamp; a bolt portion pivotally coupled to the second end of the first clamp; a nut portion fastened to the bolt portion; a first elastic member disposed in the nut portion and surrounding the bolt portion; the second clamp has a fourth end spaced from the third end; By rotating the first clamp and the second clamp, the second end of the first clamp and the fourth end of the second clamp are coupled to each other, The first clamp and the second clamp have an outer periphery that extends to a first curvature; The second end is a second end face toward the fourth end; a rounded surface extending from the second end surface to the outer periphery of the first clamp, the rounded surface having a second curvature greater than the first curvature; The fourth end is a fourth end surface toward the second end; a first fastening groove extending from the fourth end surface along a direction from the second end surface toward the fourth end surface; a fastening portion defining a first fastening groove and enclosing the bolt portion; a protrusion protruding from an upper end of the fastening portion along a direction from the second end surface toward the fourth end surface, The fastening part is a support surface that encloses a bolt portion that is inserted into the first fastening groove; a fastening surface extending radially from the support surface of the bolt portion and opposing the fourth end surface.

2. a washer surrounding the bolt portion and disposed between the second end surface and the fourth end surface; 10. The clamping device of claim 1, further comprising a locking washer surrounding the bolt portion and disposed between the fastening surface and the nut portion to increase friction.

3. The nut portion includes a plurality of stopping projections extending along the longitudinal direction of the bolt portion, Further comprising a stopping portion coupled to the stopping protrusion, The stopping part is a stopping ball disposed in the second clamp and disposed between the plurality of stopping protrusions; 3. The clamping device according to claim 2, further comprising: a second elastic member connected to the stopping ball.

4. 2. The clamping device according to claim 1, further comprising an indicator portion disposed at an end of the bolt portion and having a line extending in a circumferential direction.

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