A stable installation rail transit forging clamp structure
By using a design that enlarges the holes in the metal pad to make contact with the spherical surface of the ball bearing, combined with a top support spring, the problem of the clamp and pad loosening due to vibration is solved, thus achieving stable installation of the track.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI YUNLIANG ENTERPRISE DEV
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-07
AI Technical Summary
The existing rigid connection between the clamp and the pad is susceptible to vibration, which can cause it to loosen and affect the stability of the track.
A metal pad is used to enlarge the hole and form a spherical contact with the ball. Combined with a top support spring to provide preload, it allows for three-dimensional fine adjustment. The ball automatically compensates for displacement by rolling within the enlarged hole.
It effectively prevents the clamps and pads from loosening, maintains constant clamping force, improves track stability, and the spring automatically resets to eliminate the effects of vibration.
Smart Images

Figure CN224469431U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of clamp technology, specifically to a stable installation forged clamp structure for rail transit. Background Technology
[0002] The existing clamps and pads are mostly rigid connections, with gaps filled by rubber plates. However, during use, the track is affected by vibration, which directly impacts the pads. Over time, the pads and clamps may loosen, affecting the stability of the track. Utility Model Content
[0003] The purpose of this utility model is to provide a stable installation rail transit forged clamp structure. The enlarged hole of the metal pad forms a spherical contact with the ball, allowing the pad to be finely adjusted in three dimensions. The top support spring continuously provides preload force. Even if the pad wears out due to long-term use, the ball can still fit tightly against the enlarged hole and maintain a constant clamping force, which can solve the problems in the prior art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a stable installation rail transit forged clamp structure, including a U-shaped clamp, the U-shaped clamp including a base and a top buckle, a locking groove is provided between the top buckle and the base, a metal pad is provided inside the locking groove, an inclined groove is provided inside the base, the inclined groove extends through to the inside of the locking groove, and a top bolt assembly is provided inside the inclined groove.
[0005] The above scheme constrains the trajectory of the marble, prevents it from deviating and getting stuck, and ensures that the compensation direction is consistent with the vibration displacement direction.
[0006] Preferably, the top buckle has a locking bolt inside, and the metal pad has multiple positioning screw holes inside, wherein the bottom of the positioning screw holes has an enlarged hole, and the locking bolt is connected to the metal pad through the positioning screw holes.
[0007] The above solution provides a dynamic compensation space for the enlarged hole structure at the bottom of the positioning screw hole, thus avoiding rigid locking.
[0008] Preferably, the top bolt assembly includes a screw and a threaded sleeve, wherein the threaded sleeve is welded to the base, and the screw and the threaded sleeve are connected by an internal thread.
[0009] Preferably, one end of the screw is provided with a support spring, and one end of the support spring is provided with a ball bearing, which extends into the interior of the inclined groove.
[0010] Preferably, the marble fits into the enlarged hole.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. In this utility model, traditional rigid connections rely on bolt preload, which can easily lead to thread stripping or pad displacement due to vibration. This solution uses a spring ball dynamic compensation system to convert vibration energy into spring deformation, which automatically resets after vibration, thus fundamentally preventing loosening.
[0013] 2. In this utility model, the enlarged hole of the metal pad forms a spherical contact with the ball, allowing the pad to be finely adjusted in three dimensions. The top support spring continuously provides preload force, so that even if the pad is worn due to long-term use, the ball can still fit tightly against the enlarged hole and maintain a constant clamping force. Attached Figure Description
[0014] Figure 1 This is the overall front view of the present invention;
[0015] Figure 2 This is an overall side view of the present invention;
[0016] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model.
[0017] In the diagram: 1. U-shaped clamp; 2. Metal pad; 3. Top bolt assembly; 101. Locking groove; 102. Base; 103. Top buckle; 104. Locking bolt; 1021. Angled groove; 201. Positioning screw hole; 202. Enlarged hole; 301. Screw sleeve; 302. Top support spring; 303. Ball bearing; 304. Screw. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] To address the issue that existing systems primarily use rigid connections between clamps and base plates, with gaps filled by rubber sheets, the track is subject to vibrations during use. These vibrations directly impact the base plate, causing it to loosen over time and affecting track stability. Please refer to [link to relevant documentation]. Figure 1-3 The present invention provides the following solution:
[0020] A stable installation rail transit forged clamp structure includes a U-shaped clamp 1. The U-shaped clamp 1 includes a base 102 and a top buckle 103. A locking groove 101 is provided between the top buckle 103 and the base 102. A metal pad 2 is provided inside the locking groove 101. An inclined groove 1021 is provided inside the base 102. The inclined groove 1021 extends through to the inside of the locking groove 101. A top bolt assembly 3 is provided inside the inclined groove 1021.
[0021] In this embodiment, the metal pad 2 is embedded in the locking groove 101 of the U-shaped clamp 1, and the locking bolt 104 is inserted into the positioning screw hole 201 to achieve initial fixation.
[0022] The top buckle 103 has a locking bolt 104 inside, and the metal pad 2 has multiple positioning screw holes 201 inside. The bottom of the positioning screw hole 201 has an enlarged hole 202. The locking bolt 104 is connected to the metal pad 2 through the positioning screw hole 201. The top bolt assembly 3 includes a screw 304 and a screw sleeve 301. The screw sleeve 301 is welded to the base 102. The screw 304 and the screw sleeve 301 are connected by an internal thread. One end of the screw 304 is provided with a top support spring 302. One end of the top support spring 302 is provided with a ball 303. The ball 303 extends into the interior of the inclined groove 1021 and fits against the enlarged hole 202.
[0023] In this embodiment, when the track is subjected to vibration and impact, the vibration energy is transmitted to the metal pad 2, causing it to undergo micro-displacement. At this time, the top bolt assembly 3 in the inclined groove 1021 is activated, and the ball 303 squeezes the top support spring 302 under the action of vibration. The spring contracts to absorb the impact energy, and the ball rolls along the inclined groove, always adhering to the inner wall of the enlarged hole 202, forming an adaptive fit. After the vibration disappears, the top support spring 302 pushes the ball 303 to reset, and pushes the enlarged hole 202 in the opposite direction to automatically compensate for the displacement gap.
[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A stable installation forged clamp structure for rail transit, characterized in that, The device includes a U-shaped clamp (1), which includes a base (102) and a top buckle (103). A locking groove (101) is provided between the top buckle (103) and the base (102). A metal pad (2) is provided inside the locking groove (101). An inclined groove (1021) is provided inside the base (102). The inclined groove (1021) extends through to the inside of the locking groove (101). A top bolt assembly (3) is provided inside the inclined groove (1021).
2. The stable installation rail transit forged clamp structure according to claim 1, characterized in that: The top buckle (103) is provided with a locking bolt (104) inside, and the metal pad (2) is provided with multiple positioning screw holes (201) inside. The bottom of the positioning screw hole (201) is provided with an enlarged hole (202). The locking bolt (104) is connected to the metal pad (2) through the positioning screw hole (201).
3. The stable installation rail transit forged clamp structure according to claim 2, characterized in that: The top bolt assembly (3) includes a screw (304) and a screw sleeve (301), wherein the screw sleeve (301) is welded to the base (102), and the screw (304) and the screw sleeve (301) are connected by an internal thread.
4. The stable installation rail transit forged clamp structure according to claim 3, characterized in that: One end of the screw (304) is provided with a top support spring (302), and one end of the top support spring (302) is provided with a ball (303), which extends into the interior of the inclined groove (1021).
5. The stable installation rail transit forged clamp structure according to claim 4, characterized in that: The ball (303) is attached to the enlarged hole (202).