Railway vehicle thread sleeve with quick-disassembly and quick-assembly structure

Abstract

The utility model discloses a railway vehicle thread insert with a quick-release and quick-assembly structure, which relates to the technical field of thread inserts and comprises a thread insert body, a screw movably mounted in the thread insert body, a bolt head arranged above the screw, two positioning grooves arranged in the thread insert body, two positioning grooves arranged outside the screw and two positioning grooves arranged in the bolt head. Positioning pins are movably inserted into the two positioning grooves of the screw sleeve body, the screw rod and the bolt head in a penetrating manner; according to the utility model, the existing steel wire thread insert is improved, and the steel wire thread insert is quickly disassembled and assembled through the specially matched screw rod, so that not only is the use convenient, but also the base material in the railway vehicle can be locally repaired, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of screw sleeves, in particular to a rail vehicle screw sleeve with a quick-disassembly and quick-assembly structure. Background Art

[0002] Wire thread insert is a new type of internal thread fastener suitable for threaded connection. It is screwed into and fastened into the threaded hole of one of the connected parts to form a standard internal thread, and the bolt is then screwed into it. It is a spring-shaped internal and external thread concentric body made of high-strength, high-precision, smooth-surfaced cold-rolled diamond stainless steel wire. It is mainly used to enhance and protect the internal thread of low-strength materials.

[0003] In rail vehicles, aluminum, plastic and other materials are often used for interior decoration. These soft materials cannot withstand the strength of direct bolt installation and often break during the bolt tightening process. Therefore, it is necessary to install wire screw inserts on the internal substrate of the rail vehicle to facilitate bolt installation. However, the wire screw inserts at this stage are all designed to be installed once and cannot be removed. If the wire screw insert is damaged such as thread stripping during use, local repairs cannot be performed and the entire internal substrate of the rail vehicle can only be removed and replaced with a complete substrate. Therefore, the maintenance cost is very high. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a rail vehicle screw sleeve with a quick-disassembly and quick-assembly structure.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A rail vehicle screw sleeve with a quick-disassembly and quick-assembly structure comprises: a screw sleeve body, a screw rod movably installed inside the screw sleeve body, a bolt head provided above the screw rod, two positioning grooves provided inside the screw sleeve body, two positioning grooves provided outside the screw rod, two positioning grooves provided inside the bolt head, and a positioning pin movably inserted through the screw sleeve body, the screw rod and the two positioning grooves of the bolt head.

[0007] The utility model is further configured such that a stop block is provided at the tail end of the positioning pin.

[0008] The utility model is further configured such that the top end of the bolt head is provided with a hexagonal countersunk hole, and the outer edge of the bolt head is rounded.

[0009] The utility model is further configured such that a crack is opened at the tail end of the screw sleeve body.

[0010] The utility model is further configured such that the cross section of the screw sleeve body is a rhombus.

[0011] The utility model is further configured such that the screw rod is movably connected to the screw sleeve body via a thread.

[0012] The beneficial effects of the utility model are as follows: the utility model improves the existing wire thread insert, and the wire thread insert can be quickly disassembled and assembled through the screw specially matched with the utility model. It is not only convenient to use, but also can perform local repairs on the internal substrate of the rail vehicle, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a rail vehicle screw sleeve with a quick-disassembly and quick-assembly structure proposed by the utility model;

[0014] Figure 2 This is a schematic diagram of a first partial structure of a rail vehicle screw sleeve with a quick-disassembly and quick-assembly structure proposed by the utility model;

[0015] Figure 3 This is a schematic diagram of the second partial structure of a rail vehicle screw sleeve with a quick-disassembly and quick-assembly structure proposed by the utility model.

[0016] In the figure: 1, screw sleeve body; 2, screw; 3, bolt head; 4, positioning groove; 5, positioning pin; 6, stopper; 7, crack. DETAILED DESCRIPTION

[0017] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0018] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0020] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0021] Reference Figure 1-3 A rail vehicle screw sleeve with a quick-disassembly and quick-assembly structure comprises: a screw sleeve body 1, a screw rod 2 is movably installed inside the screw sleeve body 1, a bolt head 3 is provided above the screw rod 2, two positioning grooves 4 are provided inside the screw sleeve body 1, two positioning grooves 4 are provided outside the screw rod 2, and two positioning grooves 4 are provided inside the bolt head 3. A positioning pin 5 is movably inserted through the screw sleeve body 1, the screw rod 2 and the two positioning grooves 4 of the bolt head 3. The tail end of the positioning pin 5 is provided with a block 6, the top of the bolt head 3 is provided with a hexagonal countersunk hole, and the outer edge of the bolt head 3 is rounded. A crack 7 is opened at the tail end of the screw sleeve body 1, and the cross section of the screw sleeve body 1 is rhombus-shaped. The screw rod 2 is movably connected to the screw sleeve body 1 through a thread.

[0022] Working principle: When installing the utility model, the operator first punches a base hole on the soft substrate inside the rail vehicle, and then the operator can use professional tools to rotate the screw sleeve body 1 into the base hole of the soft substrate. Since the cross section of the screw sleeve body 1 is diamond-shaped, the screw sleeve body 1 has a self-tapping function. If a through hole is installed, the operator can cut off the tail end of the screw sleeve body 1 through the crack 7. If it is a countersunk hole, it does not need to be cut off. At this time, the installation of the screw sleeve body 1 is completed, and the operator can install the standard bolt inside the screw sleeve body 1 through the thread. When the screw sleeve body 1 is damaged after being used for too long and needs to be replaced, the operator The operator uses an Allen wrench, places it in the hexagonal countersunk hole on the bolt head 3, rotates the bolt head 3 and the screw 2, and under the action of the thread, the screw 2 is inserted into the interior of the screw sleeve body 1. When most of the screw 2 enters the interior of the screw sleeve body 1, the operator needs to align the positioning grooves 4 of the screw 2, the bolt head 3 and the screw sleeve body 1, and then insert the positioning pin 5 into the positioning grooves 4 of the three. At this time, under the action of the positioning pin 5, the screw sleeve body 1 and the screw 2 can rotate at the same time. Then the operator uses the tool to rotate the screw 2 and the bolt head 3 in the opposite direction. At this time, the screw sleeve body 1 and the screw 2 will be rotated out of the soft base material at the same time, which is convenient for the operator to replace the new screw sleeve body 1.

[0023] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rail vehicle screw sleeve with a quick-disassembly and quick-assembly structure, comprising: The screw sleeve body (1) is characterized in that a screw rod (2) is movably installed inside the screw sleeve body (1), a bolt head (3) is provided above the screw rod (2), two positioning grooves (4) are provided inside the screw sleeve body (1), two positioning grooves (4) are provided outside the screw rod (2), two positioning grooves (4) are provided inside the bolt head (3), and a positioning pin (5) is movably inserted through the two positioning grooves (4) of the screw sleeve body (1), the screw rod (2) and the bolt head (3).

2. The rail vehicle screw sleeve with a quick-disassembly and quick-assembly structure according to claim 1, characterized in that: A stopper (6) is provided at the tail end of the positioning pin (5).

3. The rail vehicle screw sleeve with a quick-release and quick-install structure according to claim 1, characterized in that: The top of the bolt head (3) is provided with a hexagonal countersunk hole, and the outer edge of the bolt head (3) has rounded corners.

4. The rail vehicle screw thread insert with a quick-release and quick-install structure according to claim 1, characterized in that: The tail end of the screw sleeve body (1) is provided with a crack (7).

5. The rail vehicle screw sleeve with a quick-release and quick-install structure according to claim 1, characterized in that: The cross section of the screw sleeve body (1) is rhombus-shaped.

6. The rail vehicle screw thread insert with a quick-disassembly and quick-assembly structure according to claim 1, characterized in that: The screw rod (2) is movably connected to the screw sleeve body (1) via a thread.

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