CN110857714A - Fastening assembly with visual preload force and radiator with the same - Google Patents

Abstract

The invention provides a fastening assembly with visual pretightening force, which comprises a pretightening part and a pretightening spring, wherein the pretightening part comprises a head part and a rod part, the head part is provided with a mark, the rod part is provided with a thread, one end of the pretightening spring is abutted against the head part, the other end of the pretightening spring is abutted against a first sleeve part, the first sleeve part is provided with a first fixing hole, the size of the first fixing hole is larger than that of the rod part and smaller than that of the head part, a plurality of color bands are arranged around the first fixing hole, the rod part sequentially penetrates through and extends out of the pretightening spring and the first fixed hole, and is screwed into the fixing part so as to fix the fixing part on the fixing part, and the color bands.

Description

Fastening assembly with visual preload force and radiator with the same

technical field

The present invention relates to a fastening assembly, in particular to a fastening assembly structure with pre-tightening force visualization.

Background technique

In the machinery industry, fasteners (such as threaded bolts, preloaded springs and other workpieces) have been widely used. At present, the commonly used fastener connection and installation is to use the fastener to cover the spring washer, the flat washer to pass through the fixed part, and the spring washer to be flattened and then fixed to the fixed part and other positions that need to be fixed. The compression force of fasteners in this way is mainly controlled by human feeling, especially in the case of multiple fasteners, the pre-tightening force of each fastener cannot be controlled uniformly, resulting in different stress of each fastener. , the strain is different, and even the fixed parts appear to move or deform.

Special tools, such as dynamometer wrenches, torque wrenches, etc., can now be used to control the preload. These tools for controlling the preload are based on the control of the friction torque, which is not directly related to the pressing force of the fastener connection. This pressing force is to ensure that there is no gap between the coupling and the coupled piece And the positive pressure that the relative movement occurs, that is, the preload. Therefore, quantitative control of the pre-tightening force can ensure the connection effect, which can not only avoid the occurrence of gaps or relative movement after the connection, but also prevent the connection from being too tight, so that the coupling piece and the connected piece are deformed, which affects the coupling effect.

In addition, there are some fasteners that realize the adjustment of the pre-tightening force through the spring-compressed metering scale, but the structure of the similar fasteners is complex, usually requires additional clamping parts to assist, and the pre-tightening force cannot be displayed intuitively. the size of.

SUMMARY OF THE INVENTION

In view of this, it is necessary to design and develop a fastening component with preload force visualization, which has a simple structure and can directly reflect the preload force.

A pre-tightening force visualization fastening assembly, comprising a pre-tightening piece, a pre-tightening spring and a first set, the pre-tightening piece includes a head and a rod, the head is provided with an indication mark, the rod There is an external thread on the part. The pre-tightening spring is sleeved on the rod portion, and one end of the preload spring abuts against the head portion. The first set is provided with a first fixing hole, the size of the first fixing hole is larger than the size of the rod part and smaller than the size of the head, and a plurality of colored strips are arranged around the first fixing hole. When the rod part passes through the first set and is screwed into a fixing piece, the other end of the preload spring abuts on the first set, and the color ribbon is matched with the indicator , which is used to indicate the magnitude of the pre-tightening force generated between the rod portion and the fixing member.

Further, a part of the rod portion away from the head portion is provided with external threads, and the rod portion is not provided with threads near the head portion.

Further, the rod part includes a first part and a second part; the fastening assembly further includes a support piece, one end of the first part is connected to the head, the other end is connected to the second part, the first part There is no thread on the upper part, and an external thread is arranged on the second part. The first part is provided with a circle of grooves near the position away from the head, and the grooves are used to snap into the support piece. The support piece is used for supporting the sleeve; the second part is matched with the fixing member, so as to fix the sleeve.

Further, the size of the first part is larger than that of the second part, the second part passes through a circuit board before extending into the fixing member, the circuit board defines a second fixing hole, and the second fixing hole The size is smaller than the size of the first part and larger than that of the second part, the second part passes through the second fixing hole and is screwed into the fixing member to clamp the circuit board between the first part and the between the fixings.

Further, the head is cylindrical or hexahedral, and the first fixing hole and the second fixing hole are circular.

Further, the thread is a right-hand thread.

Further, the color ribbon is an arc-shaped color ring concentric with the first fixing hole, the arc-shaped ring is evenly divided into a plurality of parts with the same area, and each part is provided with at least two colors, the The various colors of each part gradually deepen in a clockwise direction.

Further, the head is cylindrical, and the side of the cylindrical shape away from the rod is provided with a circular hollow portion, the hollow portion has a bottom surface, and the bottom surface is provided with a slot or a hollow portion. Hexagonal groove, the slot and the hexagonal groove are used to match the screwdriver.

A radiator, comprising a radiator body and a plurality of said pre-tightening force visualization fastening components, the radiator body includes a mounting base and a plurality of heat sinks mounted on the mounting base, the The set of fastening components is detachably fixed to the mounting base.

The fastening component with visible pre-tightening force provided by the present invention has a simple structure and is easy to assemble, and can roughly reflect the size of the pre-tightening force, which is helpful for installing the fastening components with the same pre-tightening force, and has good practical value .

Description of drawings

FIG. 1 is a schematic structural diagram of a fastening assembly for visualizing a pre-tightening force provided by an embodiment of the present invention.

FIG. 2 is a partial enlarged view of the fastening assembly with preload force visualization shown in FIG. 1 .

FIG. 3 is a schematic diagram of the preload screw of the fastening assembly with the preload force visualization shown in FIG. 1 .

4 is a schematic diagram of a heat sink with the fastening assembly shown in FIG. 1 with preload visualization.

Description of main component symbols

The following specific embodiments will further illustrate the present invention in conjunction with the above description of the drawings.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings 1-4 of specific embodiments. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

As shown in FIGS. 1-2 , a fastening assembly 100 with visible pretensioning force, the fastening assembly 100 includes a pretensioning member 10 , a pretensioning spring 20 , and a kit 30 . The preloading member 10 is used for fixing the sleeve 30 on the fixing member 60 through the preloading spring 20 .

The preloading member 10 may be a screw rod, a bolt, a stud, a screw, etc. In this embodiment, the preloading member 10 is a screw rod. The preload 10 includes a head 101 and a rod 102 fixed on the head 101. The head 101 is provided with an indicator 1010, and the rod 102 is provided with an external thread 103, corresponding to the , the fixing member 60 is provided with an internal thread (not shown in the figure) which is matched with it. The preload spring 20 is sleeved on the rod portion 102 , and one end of the preload spring 20 abuts against the head 101 . The sleeve 30 is provided with a first fixing hole 301 . The size of the first fixing hole 301 is larger than the size of the rod portion 102 and smaller than the size of the head portion 101 . There are a plurality of holes around the first fixing hole 301 . Ribbon 302. The rod portion 102 passes through and extends out of the pre-tightening spring 20 and the first fixing hole 301, and is screwed into the fixing member 60 through the cooperation between the outer thread 103 and the inner thread, so that the The sleeve 30 is fixed on the fixing member 60 . At this time, the other end of the preload spring 20 away from the head 101 abuts on the sleeve 30, the preload spring 20 is compressed, and at the same time generates a downward force to push the sleeve 30, so The magnitude of the force is proportional to the degree of compression of the preload spring 20 or the number of rotations of the preload member 10 . The color ribbon 302 cooperates with the indication mark 1010 to indicate the magnitude of the pre-tightening force generated between the rod portion 102 and the fixing member 60 along the axis line direction of the rod portion 102 .

Preferably, the external thread 103 is only located on the side of the rod portion 102 away from the head portion 101 .

Preferably, as shown in FIG. 3 , the rod portion 102 includes a first portion 1020 and a second portion 1021 , one end of the first portion 1020 is connected to the head portion 101 , and the other end is connected to the second portion 1021 . The external thread 103 is located on the second part 1021 , and the first part 1020 has no external thread. A circle of grooves 1022 is provided near the end of the first portion 1020 away from the head portion 101 . The fastening assembly 100 further includes a support piece 40 , and the support piece 40 is used for snapping into the groove 1022 to support the first sleeve 30 . The second part 1021 cooperates with the fixing member 60 so as to fix the sleeve 30 .

Preferably, the size of the first part 1020 is larger than that of the second part 1021 , and a circuit board 50 is further provided between the sleeve 30 and the fixing member 60 . The second part 1021 passes through the sleeve 30 and the circuit board 50 in sequence, and the outer thread of the second part 1021 cooperates with the inner thread of the fixing member 60 to connect the sleeve 30 and the circuit The plate 50 is fixed. The circuit board 50 is provided with a second fixing hole 501. The size of the second fixing hole 501 is smaller than the size of the first part 1020 and slightly larger than the second part 1021, so that the first part 1020 cannot pass through the second fixing hole hole 501 , and the second part 1021 can pass through the second fixing hole 501 . The second part 1021 passes through the second fixing hole 501, and the external thread of the second part 1021 cooperates with the internal thread of the fixing member 60, so as to be screwed into the fixing member 60, and the The circuit board 50 is sandwiched between the first portion 1020 and the fixing member 60 .

Preferably, the first part 1020 and the second part 1021 are both cylindrical, the head 101 is cylindrical or hexahedral, and the first fixing hole 301 and the second fixing hole 501 are circular.

Preferably, the thread 103 is a right-hand thread.

Preferably, the color ribbon 302 is an arc-shaped color ring concentric with the first fixing hole 301, the arc-shaped ring is evenly divided into a plurality of parts with the same area, and each part is painted with at least two colors, The multiple colors of each part are gradually changed in a clockwise direction, such as gradually deepening. By pre-determining the relationship between the number of turns of the preload 10 and the magnitude of the preload along the axis of the rod portion 102, the range of the magnitude of the preload corresponds to the different ranges of the preload. on ribbon 302.

Preferably, the head 101 is cylindrical, and a circular hollow 1011 is formed on the side of the cylindrical away from the rod 102, the hollow has a bottom surface 1012, and the bottom surface 1012 is provided with a circular hollow 1011. There is a slot 1013 or a hexagonal groove 1014, and the slot 1013 and the hexagonal groove 1014 are used to match screwdrivers of corresponding shapes. In this embodiment, the bottom surface 1012 may include the slot 1013 and the hexagonal groove 1014 at the same time, the hexagonal groove 1014 is located at a substantially middle position of the slot 1013, and the hexagonal groove 1014 is disposed opposite to The two corners are aligned with the slot 1013 .

Preferably, as shown in FIG. 4 , a preferred embodiment of the present invention further provides a heat sink 200 including a heat sink body 201 and a plurality of the fastening components 100 . The heat sink body 201 includes a mounting base 202 and a plurality of heat sinks mounted on the mounting base 202 . The first set 30 of the fastening component 100 is detachably fixed on the mounting base 202 , and the first set 30 cooperates with the fastening component 100 to fix the heat sink 200 between the fixing members 60 . superior.

In practical applications, the fixing member 60 may be a casing of a terminal device (eg, a server) for installing the radiator, and the circuit board 50 may be a mainboard of the terminal device (eg, a computer).

In the fastening assembly 100 with visual pretensioning force provided by this embodiment, in specific use, the pretensioning member 10 is firstly passed through the pretensioning spring 20 , the first fixing hole 301 , the support piece 40 , and the second fixing hole 501 in sequence. and fasteners 60 . Then use a screwdriver to insert into the slot 1013 or the hexagonal groove 1014, rotate the preload 10 clockwise, screw the preload 10 into the fixing member 60, and at the same time memorize the number of revolutions of the preload 10, and finally observe the head The ribbon 302 indicated by the indicator mark 1010 of the part 101, through the number of revolutions of the preload 10 and the ribbon indicated by the indicator mark 1010, and roughly estimate the size of the preload, then rotate the same number of turns and make the indicator mark 1010 indicates an installation process of the same color in the same ribbon 302 , and the next fastening assembly 100 is installed so that it has approximately the same preload force as the previous fastening assembly 100 .

The fastening component with visible preloading force provided in this embodiment has a simple structure and is simple and convenient to assemble. At the same time, it can roughly reflect the size of the preloading force, which is helpful for installing the fastening components with the same preloading force, and has a good performance. Practical value.

In addition, those skilled in the art should realize that the above embodiments are only used to illustrate the present invention, not to limit the present invention. Appropriate modifications and variations of the present invention fall within the scope of the claimed invention.

Claims (9)

1. A fastening assembly with visualized pretightening force comprises a pretightening piece, a pretightening spring and a first external member, wherein the pretightening piece comprises a head part and a rod part, the head part is provided with an indication mark, and the rod part is provided with external threads; the pre-tightening spring is sleeved on the rod part, and one end of the pre-tightening spring is abutted against the head part; the first sleeve part is provided with a first fixing hole, the size of the first fixing hole is larger than that of the rod part and smaller than that of the head part, a plurality of color bands are arranged around the first fixing hole, when the rod part penetrates through the first sleeve part and is screwed into a fixing part, the other end of the pre-tightening spring abuts against the first sleeve part, and the color bands are matched with the indicating marks and used for indicating the size of pre-tightening force generated between the rod part and the fixing part.

2. The pretension-visualized fastening assembly according to claim 1, wherein the stem is externally threaded in a region of the stem remote from the head, and the stem is not threaded near the head.

3. The pretension-visible fastening assembly of claim 2, wherein the stem portion comprises a first portion and a second portion; the fastening assembly further comprises a supporting sheet, one end of the first part is connected with the head, the other end of the first part is connected with the second part, the first part is unthreaded, and the second part is provided with external threads; a circle of grooves are formed in the first part, far away from the head, and are used for being clamped into the supporting sheet; the support sheet is used for supporting the sleeve; the second portion cooperates with the fixture to secure the sleeve.

4. The pretension visualization fastening assembly of claim 3, wherein the first portion is larger in size than the second portion, the second portion passes through a circuit board before extending into the fixing member, the circuit board is provided with a second fixing hole, the size of the second fixing hole is smaller than that of the first portion and larger than that of the second portion, and the second portion passes through the second fixing hole and is screwed into the fixing member to clamp the circuit board between the first portion and the fixing member.

5. The pretension visualization fastening assembly of claim 4, wherein the head portion is cylindrical or hexahedral, and the first fixing hole and the second fixing hole are circular.

6. The pretension visualization fastening assembly of claim 1, wherein the threads are right-handed threads.

7. The pretension-visible fastening assembly of claim 1, wherein the color band is a circular arc-shaped color ring concentric with the first fixing hole, the circular arc-shaped color ring is uniformly divided into a plurality of parts with the same area, each part is provided with at least two colors, and the colors of each part are gradually changed around the clockwise direction respectively.

8. The fastening assembly for visualizing pre-tightening force of claim 1, wherein the head is cylindrical, a circular hollow is formed on a side of the cylindrical body away from the shaft, the hollow has a bottom surface, the bottom surface is provided with a slot or a hexagonal recess, and the slot and the hexagonal recess are adapted to match a screwdriver.

9. A heat sink comprising a heat sink body and a plurality of fastening assemblies according to any one of claims 1 to 8, wherein the fastening assemblies comprise a mounting base and a plurality of heat dissipating fins mounted on the mounting base, and the fastening assemblies are detachably fixed to the mounting base.

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