Locking plate for preventing hexagon socket head bolt from loosening in counter bore

Abstract

The utility model discloses a locking plate for locking a hexagon socket head bolt in a counter bore, and particularly relates to the technical field of mechanical parts, the locking plate comprises a locking plate body which is installed in the counter bore and connected with the hexagon socket head bolt, the locking plate body specifically comprises a plate body, locking lugs are symmetrically arranged at the two ends of the plate body, a round hole is formed in the surface of the locking plate, and the round hole is communicated with the counter bore. A compensation structure is arranged on the surface of the locking lug and comprises a T-shaped compensation piece, a T-shaped compensation groove is formed in the surface of the locking lug, the T-shaped compensation piece is installed in the T-shaped compensation groove, and a rubber pad is installed at the position, located on the rear side of the T-shaped compensation piece, in the T-shaped compensation groove. Under the condition that a workpiece is not damaged, the anti-loosening effect of the hexagon socket head bolt in the counter bore can be improved, the installation tightness of the locking plate in the counter bore can be improved, the use effect is further improved, and the anti-loosening device is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical parts, and more specifically to a locking piece used for preventing a hexagon socket head bolt in a countersunk hole from loosening. Background Art

[0002] ‌A hexagon socket head bolt is a fastener, also known as a hexagon socket bolt or a cup head screw. Its head is designed in the shape of an inner hexagon, that is, the outer edge of the head is round, and the middle is a recessed hexagon. This design makes it more efficient to tighten or remove the bolts using an L-type hexagon wrench because it provides greater torque and smaller space requirements. Hexagon socket head bolts are widely used in situations that require high-strength connections and compact designs, such as machinery manufacturing, the automotive industry, etc.

[0003] When the hexagon socket bolt is installed inside the countersunk hole, a locking plate is required to prevent the hexagon socket bolt from loosening, thereby improving the anti-loosening effect of the hexagon socket bolt.

[0004] After searching, the Chinese patent with authorization announcement number CN209294224U discloses a locking plate for preventing the loosening of hexagon socket head bolts in countersunk holes. The structure can be installed in the countersunk hole of the workpiece and provide sufficient anti-loosening performance without damaging the workpiece. The structure is simple, easy to produce and manufacture, and economical. It can be applied to hexagon socket head bolts of various specifications and is easy to install and disassemble.

[0005] However, in actual use, when this structure is installed in the countersunk hole of the workpiece, it is necessary to first symmetrically machine two shallow, semicircular installation grooves on the edge of the countersunk groove of the workpiece, and ensure that the locking ears of the semicircular structure extend to the inside of the installation groove and cooperate with the installation groove. In actual operation, it is difficult to ensure that the thickness of the installation groove is consistent with the thickness of the locking ear. Once the thickness of the installation groove is greater than the thickness of the locking ear, a gap is generated between the locking plate and the installation groove, affecting the anti-loosening effect. In view of this, the utility model proposes a locking plate for preventing the loosening of hexagon socket head bolts in countersunk holes. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a locking piece for preventing the hexagon socket head bolt in the countersunk hole from loosening, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a locking plate for preventing the hexagon socket head bolt from loosening in a countersunk hole, comprising a locking plate body installed inside the countersunk hole and connected to the hexagon socket bolt, the locking plate body specifically comprising a plate body, locking ears are symmetrically arranged at both ends of the plate body, and a circular hole is opened on the surface of the locking plate, the plate body is an arched structure, one end of the locking ear is a semicircular structure, and the plate body and the locking ear are an integrated structure.

[0008] In order to compensate for the gap between the countersunk mounting groove and the lock ear and improve the anti-loosening effect, preferably, a compensation structure is provided on the surface of the lock ear, and the compensation structure includes a T-shaped compensation sheet. A T-shaped compensation groove is provided on the surface of the lock ear, and the T-shaped compensation sheet is installed inside the T-shaped compensation groove. A rubber pad is installed inside the T-shaped compensation groove at the rear side of the T-shaped compensation sheet. The T-shaped compensation sheet is adapted to the structure of the T-shaped compensation groove, and the T-shaped compensation sheet is slidably connected inside the T-shaped compensation groove. The two ends of the rubber pad are respectively fixedly connected to the T-shaped compensation groove and the T-shaped compensation sheet, and a plurality of anti-slip particles are provided on the surface of the T-shaped compensation sheet.

[0009] In order to improve the strength of the periphery of the circular hole during deformation and reduce the risk of damage, and at the same time, increase the friction with the end face of the bolt head and the bottom of the countersunk hole to improve the anti-loosening performance, preferably, a thickened ring is formed integrally on the surface of the sheet body and located at the periphery of the circular hole, and the surface of the sheet body is provided with anti-slip grooves.

[0010] Technical effects and advantages of the utility model:

[0011] 1. By setting up the compensation structure, when the sheet body is flattened to cause the structure to stretch so that the lock ear extends into the countersunk installation slot, the rubber pad inside the T-type compensation slot has an elastic effect, which can make the T-type compensation sheet slide inside the T-type compensation slot to compensate for the gap between the lock ear and the installation slot, and ensure the tightness of the lock ear installed inside the installation slot. The T-type compensation sheet and the T-type compensation slot are T-shaped structures, so the T-type compensation sheet will not detach from the inside of the T-type compensation slot, and the multiple anti-skid particles on the surface of the T-type compensation sheet increase the friction between the lock ear and the installation slot, further improve the anti-loosening performance, and reduce the error when the lock ear is installed;

[0012] 2. The locking plate structure composed of the plate body, locking ears and round holes can be installed in the countersunk hole of the workpiece, providing sufficient anti-loosening performance without damaging the workpiece. The structure is simple and can be applied to various specifications of hexagon socket head bolts, which is easy to install and disassemble;

[0013] 3. The thickened ring around the circular hole can improve the strength of the circular hole during deformation and reduce the risk of damage. The anti-slip pattern on the surface of the sheet increases the friction with the end face of the bolt head and the bottom of the countersunk hole, further improving the anti-loosening performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the connection structure between the T-shaped compensation plate and the locking ear of the utility model.

[0016] Figure 3 It is a schematic diagram of the surface structure of the T-shaped compensation sheet of the utility model.

[0017] Figure 4 This is a structural state diagram of the lock plate body of the utility model when it is installed in the countersunk hole.

[0018] The reference numerals in the accompanying drawings are: 1, locking plate body; 100, plate body; 101, locking ear; 102, round hole; 2, T-shaped compensation plate; 3, T-shaped compensation groove; 4, rubber pad; 5, thickening ring; 6, anti-slip pattern; 7, anti-slip particles. DETAILED DESCRIPTION

[0019] 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 in 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.

[0020] As attached Figure 1-4 The locking plate shown in the figure for preventing the hexagon socket head bolt from loosening in the countersunk hole includes a locking plate body 1 installed inside the countersunk hole and connected to the hexagon socket head bolt. The locking plate body 1 specifically includes a plate body 100, and locking ears 101 are symmetrically arranged at both ends of the plate body 100, and a circular hole 102 is opened on the surface of the locking plate. The plate body 100 is an arched structure, and one end of the locking ear 101 is a semicircular structure. The plate body 100 and the locking ear 101 are an integrated structure.

[0021] Specifically, in this structure, the locking piece body 1 is composed of a sheet body 100, a locking ear 101 and a circular hole 102, which is suitable for a hexagon socket head bolt installed in a countersunk hole. Before installing the locking piece body 1, two shallow depth, semicircular installation grooves need to be symmetrically processed on the edge of the countersunk groove of the workpiece countersunk hole. The middle part of the locking piece body 1 is an arched sheet body 100 with a specific curvature. The arched structure can reduce the spacing between the locking ears 101 at both ends, so that the locking piece can be smoothly placed in the countersunk groove of the countersunk hole. The locking ears 101 are symmetrically arranged semicircular structures, which are conducive to matching with the installation grooves, play a guiding role during assembly and disassembly, and are not easy to scratch the surface of the workpiece;

[0022] The symmetrical arrangement is conducive to fixing the position of the lock plate body 1 during installation, and the two-way limit can provide higher anti-loosening performance. The circular hole 102 is used to observe the position of the lock plate body 1 relative to the hexagon socket head bolt during installation and reduce the resistance during deformation. When installing the lock plate body 1, first put the lock plate body 1 into the countersunk groove of the countersunk hole, so that the plate body 100 is arched upward, the circular hole 102 is aligned with the hexagon socket hole of the hexagon socket head bolt, and the locking ear 101 is aligned with the direction of the countersunk hole installation groove. Then, place the lock plate above the hexagon socket head bolt, align the special installation tool with an external hexagonal head at the center of the circular hole 102, and hammer the upper end of the installation tool with a hammer to smash the arched part of the plate body 100 until it is flush with the cylindrical head end face of the hexagon socket head bolt, and the circular hole 102 and the surrounding part are deformed to extend into the hexagonal hole of the hexagon socket head bolt and flush. At this time, the lock plate body 1 is relatively fixed to the hexagon socket head bolt;

[0023] After the sheet body 100 is flattened, the structure stretches, so that the locking ear 101 extends into the countersunk hole installation groove, and the locking sheet is relatively fixed to the countersunk hole. At this time, the locking sheet is installed, and the countersunk hole installation groove limits the displacement of the locking sheet body 1 through the locking ear 101, and the locking sheet body 1 is relatively fixed to the hexagon socket head screw, thereby limiting the rotation of the hexagon socket head screw and playing a role in preventing loosening. When and after the locking sheet is installed, only the locking ear 101 contacts the installation groove of the workpiece countersunk hole, so other surfaces of the workpiece will not be damaged. The installation groove is shallow and close to the outer end face of the workpiece, which is easy to clean and avoids dirt accumulation.

[0024] In a specific embodiment, as shown in the attached Figure 1 , 2 As shown in Figure 3, a compensation structure is provided on the surface of the lock ear 101, and the compensation structure includes a T-shaped compensation sheet 2. A T-shaped compensation groove 3 is opened on the surface of the lock ear 101, and the T-shaped compensation sheet 2 is installed inside the T-shaped compensation groove 3. A rubber pad 4 is installed inside the T-shaped compensation groove 3 at the rear side of the T-shaped compensation sheet 2. The structure of the T-shaped compensation sheet 2 is adapted to that of the T-shaped compensation groove 3, and the T-shaped compensation sheet 2 is slidably connected inside the T-shaped compensation groove 3. Both ends of the rubber pad 4 are fixedly connected to the T-shaped compensation groove 3 and the T-shaped compensation sheet 2 respectively, and a plurality of anti-slip particles 7 are provided on the surface of the T-shaped compensation sheet 2.

[0025] Specifically, in this structure, before installing the locking plate body 1, two shallow-depth, semicircular installation grooves need to be symmetrically processed on the edge of the countersunk groove of the workpiece countersunk hole, and the semicircular structure locking ear 101 is extended to the inside of the installation groove and cooperates with the installation groove, which plays a guiding role during installation and disassembly. However, it is difficult to ensure that the processing depth of the installation groove is consistent with the thickness of the locking plate. Therefore, the compensation structure on the surface of the locking ear 101 is used to compensate the locking ear 101 installed in the installation groove, increase the friction between the locking ear 101 and the installation groove, and improve the anti-loosening performance. At the same time, it can also compensate for the installation error to a certain extent, ensuring that the installation of the locking plate body 1 is more reliable. Specifically;

[0026] When the sheet body 100 is flattened, causing the structure to stretch so that the locking ear 101 extends into the countersunk mounting groove, the rubber pad 4 inside the T-shaped compensation groove 3 has an elastic effect, which can enable the T-shaped compensation sheet 2 to slide inside the T-shaped compensation groove 3, and is used to compensate for the gap between the locking ear 101 and the mounting groove, ensuring the tightness of the locking ear 101 installed inside the mounting groove. The T-shaped compensation sheet 2 and the T-shaped compensation groove 3 are T-shaped structures. Therefore, the T-shaped compensation sheet 2 will not detach from the inside of the T-shaped compensation groove 3, and the multiple anti-slip particles 7 on the surface of the T-shaped compensation sheet 2 increase the friction between the locking ear 101 and the mounting groove, further improve the anti-loosening performance, and reduce the error when installing the lock ear 101.

[0027] In a specific embodiment, as shown in the attached Figure 1 As shown, a thickened ring 5 is integrally formed on the surface of the sheet 100 and located at the periphery of the circular hole 102 , and anti-slip grooves 6 are provided on the surface of the sheet 100 .

[0028] Specifically, in this structure, the thickened ring 5 around the circular hole 102 can increase the strength of the circular hole 102 around the deformation and reduce the risk of damage. In addition, the anti-slip groove 6 on the surface of the sheet 100 increases the friction with the end face of the bolt head and the bottom of the countersunk hole, thereby improving the anti-loosening performance.

[0029] Working principle of this utility model:

[0030] The present application provides a locking plate for preventing a hexagon socket head bolt from loosening in a countersunk hole. When installing the locking plate body 1, the locking plate body 1 is placed in the countersunk groove of the countersunk hole, so that the plate body 100 is arched upward, the round hole 102 is aligned with the hexagon socket head hole of the hexagon socket head bolt, and the locking ear 101 is aligned with the direction of the countersunk hole installation groove, and then the locking plate is placed above the hexagon socket head bolt;

[0031] Align the special installation tool with an external hexagonal head with the center of the circular hole 102, and use a hammer to hit the upper end of the installation tool to smash the arched part of the plate body 100 until it is flush with the cylindrical head end surface of the internal hexagonal head bolt, and the circular hole 102 and the surrounding part are deformed to extend into the hexagonal hole of the internal hexagonal head bolt and be flush. At this time, the locking plate body 1 is relatively fixed to the internal hexagonal head bolt;

[0032] After the sheet body 100 is flattened, the structure stretches, so that the locking ear 101 extends into the countersunk hole installation groove, and the locking sheet and the countersunk hole are relatively fixed. At this time, the locking sheet body 1 is installed, and the countersunk hole installation groove limits the displacement of the locking sheet body 1 through the locking ear 101, and the locking sheet body 1 is relatively fixed to the hexagon socket head screw, thereby limiting the rotation of the hexagon socket head screw, playing a role in preventing loosening;

[0033] The rubber pad 4 inside the T-shaped compensation groove 3 has an elastic effect, which enables the T-shaped compensation sheet 2 to slide inside the T-shaped compensation groove 3, and is used to compensate for the gap between the lock ear 101 and the installation groove, ensuring the tightness of the lock ear 101 installed inside the installation groove. The multiple anti-skid particles 7 on the surface of the T-shaped compensation sheet 2 increase the friction between the lock ear 101 and the installation groove, further improve the anti-loosening performance, and reduce the error when the lock ear 101 is installed;

[0034] When the lock plate body 1 needs to be removed, a flat-blade screwdriver can be used to insert the lock plate body 1 into the bottom of the hexagon socket bolt portion, and at a specific angle, using the countersunk edge of the workpiece as a fulcrum, the lock plate can be pried out from the hexagon socket bolt and the mounting slot.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A locking plate for preventing a hexagon socket head bolt from loosening in a countersunk hole, comprising a locking plate body (1) installed in the countersunk hole and connected to the hexagon socket head bolt, characterized in that: The locking plate body (1) specifically comprises a plate body (100), locking ears (101) are symmetrically arranged at both ends of the plate body (100), a circular hole (102) is opened on the surface of the locking plate, and a compensation structure is arranged on the surface of the locking ear (101); The compensation structure comprises a T-shaped compensation sheet (2), a T-shaped compensation groove (3) is provided on the surface of the lock ear (101), the T-shaped compensation sheet (2) is installed inside the T-shaped compensation groove (3), and a rubber pad (4) is installed inside the T-shaped compensation groove (3) at the rear side of the T-shaped compensation sheet (2).

2. The locking piece for preventing the hexagon socket head bolt from loosening in a countersunk hole according to claim 1, characterized in that: The sheet body (100) is an arched structure, one end of the locking ear (101) is a semicircular structure, and the sheet body (100) and the locking ear (101) are an integrated structure.

3. The locking piece for preventing the hexagon socket head bolt from loosening in a countersunk hole according to claim 1, characterized in that: A thickened ring (5) is integrally formed on the surface of the sheet body (100) and located at the periphery of the circular hole (102), and anti-slip grooves (6) are provided on the surface of the sheet body (100).

4. The locking piece for preventing the hexagon socket head bolt from loosening in a countersunk hole according to claim 1, characterized in that: The T-shaped compensation sheet (2) is structured to match the T-shaped compensation groove (3), and the T-shaped compensation sheet (2) is slidably connected inside the T-shaped compensation groove (3).

5. The locking piece for preventing the hexagon socket head bolt from loosening in a countersunk hole according to claim 1, characterized in that: The two ends of the rubber pad (4) are respectively fixedly connected to the T-shaped compensation groove (3) and the T-shaped compensation sheet (2), and a plurality of anti-slip particles (7) are provided on the surface of the T-shaped compensation sheet (2).

Images