Hand-screwing butt-joint fastening mechanism for detachable steel rail flaw detection trolley
By designing a hand-tightening fastening mechanism, which combines hand-tightening screws, springs, and elastic clips, the problem of screws easily falling off and not being tightened when the front and rear bodies of the detachable flaw detection trolley are connected is solved, achieving a stable connection and improving the safety of railway operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-03-27
AI Technical Summary
In the existing detachable flaw detection trolley's front and rear body docking mechanism, the fastening screws are prone to falling off or not being tightened properly, posing a safety risk to railway operations.
A hand-tightening fastening mechanism was designed, including a hand-tightening screw, a spring, an elastic clip, and a pair of bases. The spring supports the hand-tightening screw to prevent it from falling freely in the vertical direction, and the elastic clip is used to fix it in the groove of the base. Combined with the butterfly handle, it prevents slippage and achieves a stable connection.
It effectively prevents the fastening screws from falling off and slipping, ensuring stable docking of the front and rear car bodies and reducing safety risks in railway operations.
Smart Images
Figure CN224045187U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a butt joint fastening mechanism of a middle detachable trolley, in particular to a fastening mechanism when the front and rear two parts of the trolley butt joint. BACKGROUND
[0002] The flaw detection trolley is widely applicable to detecting the steel rails used in the existing ordinary railway, high-speed railway, urban subway or light rail. At present, the most widely used flaw detection trolley is an ultrasonic flaw detection trolley. The principle of ultrasonic detection is that when the ultrasonic probe (piezoelectric chip) in the probe is excited by the ultrasonic emission signal (i.e. "high-voltage pulse") emitted by the system, it will vibrate according to its inherent vibration frequency. Ultrasonic waves propagate in the steel rail, and when they encounter cracks, defects or cavities in the steel rail, part of the ultrasonic wave energy will be reflected back. The energy reflected back is received by the chip and becomes a return wave. The return waves obtained by various ultrasonic probes are converted into electrical signals in the ultrasonic transducer, and then subjected to analog processing, digital processing, spatial conversion, damage identification, and finally displayed in the form of an image on the display control computer, completing the detection process of the different parts and different forms of damage of the steel rail.
[0003] The current detachable flaw detection trolley is fixed and tightened by ordinary round bakelite hand screws after the front and rear trolley bodies are butt jointed, and the screws have the risk of falling off. However, solid objects such as metals are strictly prohibited from falling in the track area during railway operation, which is a high risk. Moreover, the round bakelite hand screws have the risk of slipping and not being tightened. SUMMARY
[0004] In view of the problem that the fastening screws of the current detachable flaw detection trolley front and rear trolley body butt joint mechanism are prone to falling off and not being tightened, the utility model provides a hand screw butt joint fastening mechanism.
[0005] The specific technical scheme of the utility model is as follows:
[0006] A hand screw butt joint fastening mechanism for a detachable steel rail flaw detection trolley, comprising a hand screw, a spring, an elastic card and a hand seat, which can be used to fix the front and rear trolley bodies when they are butt jointed.
[0007] Preferably, before butt joint installation, the spring ensures that the hand screw cannot freely fall on the base in the vertical direction, and the spring supports the hand screw, so that the threaded segment of the hand screw is hidden in the base and does not affect the translation and cross butt joint of the front and rear trolley bodies.
[0008] Preferably, the elastic card clamps the threaded segment of the hand screw and is embedded in the groove of the base at the same time, preventing the spring from ejecting and falling off the hand screw from the base.
[0009] Preferably, the handle of the screw is butterfly-shaped, which does not have the problem of slipping, and can also be tightened using a movable wrench or other tools.
[0010] Preferably, the base has three cylindrical cavities with diameters Ra, Rb and Rc respectively; the spring has an inner diameter C1 and an outer diameter C2; the elastic clamp has an inner diameter C3 and an outer diameter C4; the hand screw consists of a hand screw seat, a light shaft section and a threaded section, the hand screw seat has an outer diameter D1, the light shaft section has an outer diameter D2, and the threaded section has an outer diameter D3; in the above dimensions, D1>Ra>C2>C1>Rb>D3>D2, Rc>C4>D3>C3>D2, and C4>Rb.
[0011] The beneficial effects of the present application
[0012] The hand screw butt joint fastening mechanism improves the problem of traditional fastening mode that the hand screw is easy to fall off and not tightened. BRIEF DESCRIPTION OF DRAWINGS
[0013] Fig. 1 is an application scene diagram of the hand screw butt joint fastening mechanism of the present application.
[0014] Fig. 2 is a working schematic diagram of the hand screw butt joint fastening mechanism of the present application.
[0015] Fig. 3 is an exploded view of the hand screw butt joint fastening mechanism of the present application.
[0016] Fig. 4 is an assembly sectional view of the hand screw butt joint fastening mechanism of the present application.
[0017] Fig. 5 is a perspective view of the hand screw butt joint fastening mechanism after locking of the present application.
[0018] Fig. 6 is a size schematic diagram of the seat of the present application.
[0019] Fig. 7 is a size schematic diagram of the hand screw of the present application.
[0020] Fig. 8 is a size schematic diagram of the elastic clamp of the present application.
[0021] Fig. 9 is a size schematic diagram of the spring of the present application. DETAILED DESCRIPTION
[0022] The present application will be further described below in combination with embodiments, but the protection scope of the present application is not limited thereto:
[0023] In combination Figures 1-9 A hand screw butt joint fastening mechanism for a detachable steel rail flaw detection trolley, which comprises a base 1, a hand screw 2 and a hand seat 5, wherein:
[0024] The hand screw 2 comprises a hand screw seat and a screw column, and the screw column has an external thread;
[0025] The hand seat 5 is provided with a screw hole which matches the screw column.
[0026] The base 1 has a through hole, the screw column of the hand screw 2 is inserted from the top end of the through hole and is screwed into the screw hole of the counter seat 5 from the bottom end of the through hole to realize butt joint fastening.
[0027] Preferably, it further comprises a spring 3 and an elastic card 4, the screw column of the hand screw 2 has a threaded section and a light axis section, the threaded section is located at the bottom of the hand screw 2, the elastic card 4 is clamped above the threaded section and is embedded in the groove of the base 1 for fixation, and the spring 3 is sleeved outside the light axis section and is positioned by the hand screw seat and the elastic card 4 at the upper and lower ends respectively.
[0028] Preferably, the hand screw seat of the hand screw 2 is butterfly-shaped.
[0029] Specifically:
[0030] As shown in FIG. 1, it is the application scene diagram of the hand screw butt joint fastening mechanism 100 of the utility model, which is used for locking and fixing the front and rear vehicle bodies after the front and rear vehicle bodies are translated and assembled.
[0031] As shown in FIG. 2, it is the working schematic diagram of the utility model, in working, the counter seat 5 is translated along the arrow direction to be directly below the base 1, then the hand screw 2 is pressed downward and rotated, so that the base 1 and the counter seat 5 are fixed together.
[0032] As shown in FIG. 3, a hand screw butt joint fastening mechanism is composed of a base 1, a hand screw 2, a spring 3, an elastic card 4 and a counter seat 5. The spring 3 is installed on the light axis section of the hand screw 2, so as to ensure that the hand screw 2 cannot freely fall on the base 1 in the vertical direction, and the spring 3 supports the hand screw 2, so that the threaded section of the hand screw 2 is hidden in the base 1 and does not affect the translation and cross butt joint of the front and rear vehicle bodies.
[0033] As shown in FIG. 4, it is the assembly sectional view of the hand screw butt joint fastening mechanism, after the spring 3 is installed on the hand screw handle 2, the spring 3 and the hand screw handle 2 are inserted from the small hole end of the base 1, then the elastic card 4 is clamped above the threaded section of the hand screw handle 2, and is embedded in the large hole of the base 1, so as to prevent the spring 3 from ejecting and falling the hand screw 2 from the base 1.
[0034] As shown in FIG. 5, it is the perspective view of the hand screw butt joint fastening mechanism after locking, the spring 3 is compressed in the upper hole of the base 1, the hand screw 2 is tightly screwed to lock the counter seat 5, so that the base 1 and the counter seat 5 are fixed together.
[0035] As shown in FIG. 6, it is the size schematic diagram of the hand screw butt joint fastening mechanism seat, wherein Rc>Ra>Rb.
[0036] As shown in FIG. 7, it is the size schematic diagram of the hand screw of the hand screw butt joint fastening mechanism, wherein D1>D3>D2.
[0037] As shown in Figs. 8 and 9, a hand-tightened butt joint fastening mechanism elastic card and spring size diagram, in combination with Figure 5 and Figure 6 The overall size relationship is: D1>Ra>C2>C1>Rb>D3>D2, Rc>C4>D3>C3>D2, C4>Rb, to ensure that the mechanism can be normally assembled and normally work.
[0038] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.
Claims
1. A hand-tightened docking fastening mechanism for a detachable rail inspection trolley, characterized in that It includes base (1), hand screw (2), spring (3), elastic card (4) and hand seat (5), wherein: The hand screw (2) includes a hand screw seat and a screw column, and the screw column has external threads; The hand seat (5) is internally provided with a screw hole, which is matched with the screw column; The base (1) has a through hole, the screw column of the hand screw (2) is inserted into the top end of the through hole and is screwed into the screw hole of the hand seat (5) after being passed through the bottom end of the through hole, so as to realize butt fastening; The screw column of the hand screw (2) has a threaded section and a light axis section, the threaded section is located at the bottom of the hand screw (2), the elastic card (4) is clamped above the threaded section and is embedded in the groove of the base (1) at the same time, and the spring (3) is sleeved outside the light axis section and is limited by the hand screw seat and the elastic card (4) at the upper and lower ends.
2. The twist-to dock fastening mechanism of claim 1, wherein The hand screw seat of the hand screw (2) is butterfly-shaped.
3. The twist-to-engage fastening mechanism of claim 1 wherein The through hole of the base (1) is divided into three cylindrical cavities from top to bottom, and the diameters of the three cylindrical cavities are Ra, Rb and Rc respectively; the inner diameter of the spring (3) is C1, and the outer diameter is C2; the inner diameter of the elastic card (4) is C3, and the outer diameter is C4; the outer diameter of the hand screw seat of the hand screw (2) is D1, the outer diameter of the light axis section is D2, and the outer diameter of the threaded section is D3; D1>Ra>C2>C1>Rb>D3>D2, Rc>C4>D3>C3>D2, and C4>Rb.