Expansion bolt with auxiliary mounting structure

Abstract

The utility model relates to the technical field of expansion bolts, in particular to an expansion bolt with an auxiliary installation structure, which comprises a countersunk bolt, an expansion tube, a flat gasket, an elastic gasket and a nut, an expansion groove is arranged at the bottom of the side end face of the expansion tube, the countersunk bolt consists of an expansion rod and a screw rod, and an expansion ball head is arranged at the bottom of the expansion rod. A spherical groove is formed in the top of the expansion rod, a spherical joint is arranged at the bottom of the lead screw, and the lead screw and the expansion rod are rotationally connected through matching of the spherical joint and the spherical groove. According to the expansion bolt, the screw rod and the expansion rod are rotationally connected, so that the screw rod and the expansion rod can be stretched at a certain included angle, the expansion pipe is attached to the preset hole, the screw rod is perpendicular to the vertical face of equipment, the nut is attached to the vertical face in parallel, and the stability of the expansion bolt is greatly improved; through cooperation of the spherical joint and the spherical groove which are rotationally connected in a damping mode, the lead screw is prevented from sliding excessively, and convenience of lead screw installation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion bolts, in particular to an expansion bolt with an auxiliary installation structure. Background Art

[0002] Expansion bolts are special threaded connectors used to fix pipe supports, hangers, brackets and equipment on walls, floors and columns. They are mainly composed of countersunk bolts and expansion tubes. The countersunk head at the end of the bolt expands the expansion tube with an opening to generate friction and gripping force, so that the bolt is expanded and tightened in the hole pre-drilled with an electric drill, thereby achieving the fixation of the bolt. However, when the existing expansion bolts are inserted into the hole for locking, they rely on the nut to drive the bolt to expand the expansion tube.

[0003] Existing expansion bolts need to be pre-drilled before installation, and the holes are easily skewed during the drilling process. Installing the expansion bolts in the skewed holes can easily cause the locking nut to not fit closely with the exterior surface of the equipment, resulting in uneven force and thread slippage during the tightening process, and affecting the stability of the bolt tightening. Therefore, an expansion bolt with an auxiliary installation structure is needed to solve the above problem. Utility Model Content

[0004] The utility model aims to provide an expansion bolt with an auxiliary installation structure to solve the problems in the prior art that the expansion bolt is prone to thread slippage and poor stability when used in an inclined hole.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an expansion bolt with an auxiliary installation structure, comprising a countersunk bolt, an expansion tube, a flat gasket, an elastic gasket and a nut, an expansion groove is arranged at the bottom of the side end surface of the expansion tube, the countersunk bolt is composed of an expansion rod and a screw rod, an expansion ball head is arranged at the bottom of the expansion rod, a spherical groove is arranged at the top of the expansion rod, a spherical joint is arranged at the bottom of the screw rod, and the screw rod and the expansion rod are rotatably connected through the spherical joint and the spherical groove.

[0006] Preferably, the ratio of the inner diameter of the expansion tube to the diameter of the expansion rod is 5:3, so that the expansion rod has a certain movable space in the expansion tube, thereby facilitating the matching of the spherical joint and the spherical groove.

[0007] Preferably, the inner end surface of the expansion tube close to the expansion groove end is provided with a fitting claw, and the wall thickness of the bottom of the expansion tube is enhanced by the fitting claw, so that it can respond to expansion quickly.

[0008] Preferably, the end surface of the fitting claw close to the expansion ball head is a sloped structure to improve the smoothness of its expansion.

[0009] Preferably, the inner end surface of the spherical groove and the outer end surface of the spherical joint are subjected to wear treatment to increase the resistance between the expansion rod and the screw rod, thereby preventing the screw rod from swinging randomly under its own gravity and affecting installation.

[0010] Preferably, a slotted hole is provided at the end of the screw rod away from the spherical joint, and the slotted hole facilitates the passage of a flat-head bolt to fix the screw rod, thereby preventing the screw rod from slipping when the knob nut is turned.

[0011] Preferably, the length of the expansion rod is the same as that of the expansion tube, so that the screw rod and the expansion rod are matched and connected with the screw rod near the top of the expansion tube to obtain a larger adjustment angle.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model rotates the connected screw rod and expansion rod so that the screw rod and the expansion rod can be stretched at a certain angle, so that the expansion tube fits with the preset hole, and the screw rod is perpendicular to the vertical surface of the equipment, so that the nut fits parallel to the vertical surface, which greatly improves the stability of the expansion bolt.

[0014] 2. The utility model prevents the screw rod from sliding excessively by cooperating with the spherical joint and the spherical groove connected by damping rotation, thereby ensuring the convenience of screw rod installation.

[0015] 3. The utility model improves the expansion effect and smoothness of the expansion tube through the cooperation of the expansion ball head and the fitting claw, and further improves the convenience of installation of the expansion bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the utility model;

[0017] Figure 2 It is a front cross-sectional view of the utility model in the state of oblique hole installation.

[0018] In the figure: 1 expansion tube, 11 expansion groove, 112 spherical groove, 12 fitting claws, 2 countersunk bolts, 21 expansion rods, 211 expansion ball heads, 22 screw rods, 221 spherical joints, 222 slotted notches, 3 flat washers, 4 elastic washers, and 5 nuts. 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] Example 1

[0021] See also Figure 1 and Figure 2 The expansion bolt with an auxiliary installation structure shown in the figure includes a countersunk bolt 2, an expansion tube 1, a flat gasket 3, an elastic gasket 4 and a nut 5. The bottom of the side end surface of the expansion tube 1 is provided with an expansion groove 11. The countersunk bolt 2 is composed of an expansion rod 21 and a screw rod 22. The bottom of the expansion rod 21 is provided with an expansion ball head 211, the top of the expansion rod 21 is provided with a spherical groove 112, and the bottom of the screw rod 22 is provided with a spherical joint 221. The screw rod 22 and the expansion rod 21 are rotatably connected through the spherical joint 221 and the spherical groove 112.

[0022] The ratio of the inner diameter of the expansion tube 1 to the diameter of the expansion rod 21 is 5:3, so that the expansion rod 21 has a certain movable space in the expansion tube 1, thereby facilitating the matching of the spherical joint 221 and the spherical groove 112.

[0023] The inner end surface of the expansion tube 1 close to the expansion groove 11 is provided with a fitting claw 12, and the fitting claw 12 increases the wall thickness of the bottom of the expansion tube 1, so that it can respond to expansion quickly.

[0024] The end surface of the fitting claw 12 close to the expansion ball head 211 is a sloped structure to improve the smoothness of its expansion.

[0025] The inner end surface of the spherical groove 112 and the outer end surface of the spherical joint 221 are subjected to wear treatment to increase the resistance between the expansion rod 21 and the screw rod 22, thereby preventing the screw rod 22 from swinging randomly under its own gravity and affecting installation.

[0026] A slotted notch 222 is provided at the end of the screw rod 22 away from the spherical joint 221 , through which a flat-end bolt can be easily passed to fix the screw rod 22 , thereby preventing the screw rod 22 from slipping when the knob nut 5 is turned.

[0027] The length of the expansion rod 21 is the same as that of the expansion tube 1, so that the screw rod 22 and the expansion rod 21 are matched and connected with the screw rod 22 near the top of the expansion tube 1 to obtain a larger adjustment angle.

[0028] When using the expansion bolt: first, drill a hole on the wall with a number matching the bolt diameter, then pass the countersunk bolt 2 through the expansion tube 1, insert the countersunk bolt 2 and the expansion ball head 211 ends of the expansion tube 1 into the hole, then sequentially sleeve the flat washer 3, elastic washer 4 and nut 5 on the nut 5, insert a flat screwdriver into the slot 222 of the screw rod 22, fix the screw rod 22, tighten the nut 5 with a hexagonal wrench, make the expansion ball head 211 slide in the expansion tube 1, thereby pushing open the bottom of the expansion tube 1, and the spherical joint 221 and the spherical groove 112 cooperate so that a certain angle can exist between the expansion rod 21 and the screw rod 22, the expansion tube 1 is parallel to the drilled hole, and the nut 5 is parallel to the outer facade of the wall, so as to achieve the purpose of tightening.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An expansion bolt with an auxiliary installation structure, characterized in that: include: A countersunk bolt (2), an expansion tube (1), a flat washer (3), an elastic washer (4) and a nut (5); the bottom of the side end surface of the expansion tube (1) is provided with an expansion groove (11); the countersunk bolt (2) is composed of an expansion rod (21) and a screw rod (22); the bottom of the expansion rod (21) is provided with an expansion ball head (211); the top of the expansion rod (21) is provided with a spherical groove (112); the bottom of the screw rod (22) is provided with a spherical joint (221); the screw rod (22) and the expansion rod (21) are rotatably connected through the spherical joint (221) and the spherical groove (112).

2. The expansion bolt with auxiliary installation structure according to claim 1, characterized in that: The ratio of the inner diameter of the expansion tube (1) to the diameter of the expansion rod (21) is 5:

3.

3. The expansion bolt with auxiliary installation structure according to claim 1, characterized in that: The inner end surface of the expansion tube (1) close to the expansion groove (11) is provided with a fitting claw (12).

4. The expansion bolt with auxiliary installation structure according to claim 3, characterized in that: The end surface of the fitting claw (12) close to the expansion ball head (211) is a sloped structure.

5. The expansion bolt with auxiliary installation structure according to claim 1, characterized in that: The inner end surface of the spherical groove (112) and the outer end surface of the spherical joint (221) are subjected to wear treatment.

6. The expansion bolt with auxiliary installation structure according to claim 1, characterized in that: The end of the screw rod (22) away from the spherical joint (221) is provided with a slotted opening (222).

7. The expansion bolt with auxiliary installation structure according to claim 1, characterized in that: The length of the expansion rod (21) is the same as the length of the expansion tube (1).

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