A semi-trailer leaf spring anti-falling device

Abstract

The utility model relates to the technical field of plate spring, especially a semi-trailer plate spring anti -drop device, including the plate spring piece of multiple pieces of stacking placement, the both sides of multiple plate spring piece all are equipped with the limit slot. The utility model has the advantages of: the limit frame sliding installation is in the both sides position of plate spring piece, and two first fasteners fix and connect the bottom plate with multiple plate spring pieces, and two U -shaped bolts are placed in the outer wall of limit frame, bottom plate, upper clamping seat and lower clamping seat, and then the upper clamping seat and lower clamping seat are clamped on the external frame, and are locked using U -shaped bolt, transverse plate and locking nut, on one hand, the limit frame is stably installed on the outer wall of multiple plate spring pieces, on the other hand, cooperate with two first fasteners, thereby complete the stable connection to multiple plate spring pieces, improve the stability after plate spring piece installation, the limit sleeve avoids the loosening of first fastener, thereby avoids the drop phenomenon of plate spring piece, and effectively solves the problems existing in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of leaf spring technology, and in particular to a semi-trailer leaf spring anti-detachment device. Background Technology

[0002] Semi-trailer leaf springs are elastic elements used in suspension systems. They consist of multiple alloy spring steel sheets of unequal length (such as silicon-manganese steel) stacked together to form an elastic beam of approximately equal strength, providing cushioning, vibration damping, and guidance functions.

[0003] During installation, leaf springs are typically secured using U-bolts and center bolts. However, this method results in a relatively weak resistance to external impacts after installation, making the bolts prone to loosening and causing the leaf springs to detach. To improve overall structural strength and prevent leaf spring detachment, the existing leaf spring structure has been improved to address these issues. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a semi-trailer leaf spring anti-detachment device, which effectively solves the deficiencies of the prior art.

[0005] To achieve the above objectives, one embodiment of this utility model provides a semi-trailer leaf spring anti-detachment device, comprising multiple stacked leaf springs, with limiting grooves on both sides of each leaf spring, a base plate mounted on the bottom surface of the lower leaf spring, two mounting holes in the middle of the base plate and the multiple leaf springs, with first fasteners installed inside the two mounting holes respectively, a limiting frame mounted on the outer wall of the multiple leaf springs, and the four corners of the limiting frame respectively entering the limiting groove, an upper bracket and a lower bracket arranged sequentially from top to bottom on the bottom surface of the base plate, two U-bolts mounted on the outer wall of the limiting frame, a cross plate slidably mounted on the bottom end of each of the two U-bolts, and two locking nuts threadedly connected to the ends of each of the two U-bolts.

[0006] Preferably, in any of the above embodiments, two limiting clips are installed on both sides of the middle portion of the plurality of leaf springs, and the length of the plurality of leaf springs increases sequentially from bottom to top. In this embodiment, the limiting clips include concave plates, and fastening bolts are installed on the bottom surface of the concave plates, which are threadedly connected to a leaf spring. A second fastener is installed on the top of the concave plates, and a cotter pin is inserted into one end of the second fastener to limit and block the nut on the second fastener, so as to prevent it from falling off.

[0007] Preferably, in any of the above solutions, the top ends of both first fasteners are fitted with limiting sleeves. The top end of the inner wall of the limiting frame is provided with a first slot. The two ends of the limiting sleeve are slidably connected to the two first slots respectively. In this solution, the middle part of the limiting sleeve is provided with two through slots, the shape of which is the same as the shape of the nut on the first fastener. This facilitates fitting with the nut on the first fastener. After the limiting frame is installed, the two ends of the limiting sleeve enter the interior of the first slot, thereby facilitating the limiting sleeve to be limited and pressed, preventing the first fastener from loosening. The first fastener provides a stable connection between multiple leaf springs and the base, and at the same time, it is connected by threads with two U-bolts and locking nuts to prevent multiple leaf springs from falling off.

[0008] Preferably, in any of the above solutions, a second slot is provided on both sides of the outer wall of the limiting frame, and the two U-bolts are respectively located inside the second slot. In this solution, the second slot provides an installation position for the U-bolt. When the locking nut is connected to the U-bolt, the upper and lower clamps are driven by the two horizontal plates to clamp the frame, thereby stably installing the leaf spring on the outer frame and preventing multiple leaf springs from loosening and falling off.

[0009] Preferably, the four corners of the upper bracket and the four corners of the base plate are provided with positioning pin holes, and a positioning pin is slidably installed between two adjacent positioning pin holes. This solution facilitates the positioning of the connection between the base plate and the upper bracket, ensuring a stable connection between the base plate and the upper bracket. At the same time, both ends of the upper bracket protrude downwards and form a saddle shape, which facilitates its mounting on the external frame.

[0010] Preferably, in any of the above embodiments, a third slot is provided on both sides of the bottom surface of the lower card seat, and the two horizontal plates are slidably connected to the third slot. In this embodiment, the two ends of the lower card seat are bent upward to form a saddle shape. The two third slots facilitate the provision of installation positions for the two horizontal plates, allowing the horizontal plates to be stably installed in them. After the U-bolt and the locking nut are connected, it is convenient to apply pressure to the horizontal plates, thereby pushing the lower card seat and the upper card seat to move relative to each other and be stably installed on the external frame.

[0011] This utility model has the following advantages:

[0012] 1. This semi-trailer leaf spring anti-detachment device, by setting multiple leaf springs and limiting brackets, the limiting brackets are slidably installed on both sides of the leaf springs. At the same time, two first fasteners fix the base plate to the multiple leaf springs. Meanwhile, two U-bolts are placed on the outer walls of the limiting brackets, the base plate, the upper bracket, and the lower bracket, thereby clamping the upper bracket and the lower bracket onto the external frame and locking them with U-bolts, a cross plate, and a lock nut. On the one hand, the limiting bracket is stably installed on the outer walls of the multiple leaf springs. On the other hand, it cooperates with the two first fasteners to complete the stable connection of the multiple leaf springs, improve the stability of the leaf springs after installation, and prevent the first fasteners from loosening, thereby preventing the leaf springs from falling off, and effectively solving the problems existing in the prior art.

[0013] 2. This semi-trailer leaf spring anti-detachment device includes a limiting frame and a limiting sleeve. The top wall of the limiting frame has two second slots, which are slidably connected to both ends of the limiting sleeve, thus facilitating the limiting sleeve's positioning and preventing it from loosening. Four positioning pins are provided, which are slidably connected to the positioning pin holes on the upper bracket and the base plate, thus facilitating the installation of the upper bracket and the base plate. At the same time, the upper bracket blocks the first fastener to prevent it from falling off. By providing four limiting clips, the end position of the leaf spring is limited during the elastic deformation of the leaf spring, thus preventing the leaf spring from misaligning. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the stacked structure of the leaf spring sheets of this utility model;

[0016] Figure 3 This is a first-view structural diagram of the entire utility model;

[0017] Figure 4 This is a second-view structural diagram of the entire utility model;

[0018] Figure 5 This is a schematic diagram of the limiting frame structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the base plate structure of this utility model;

[0020] Figure 7 This is a schematic diagram of the limiting clip structure of this utility model.

[0021] In the diagram: 1-Leaf spring, 2-U-bolt, 3-Limit bracket, 4-Limit clip, 401-Concave plate, 402-Fastening bolt, 403-Second fastener, 404-Cotter pin, 5-Lower seat, 6-Horizontal plate, 7-Upper seat, 8-Locking nut, 9-Base plate, 10-Limit groove, 11-First slot, 12-Second slot, 13-Mounting hole, 14-Limit clip, 15-Third slot, 16-Positioning pin, 17-Limit sleeve, 18-First fastener, 19-Positioning pin hole. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0023] like Figures 1 to 7 As shown, a semi-trailer leaf spring anti-detachment device includes multiple stacked leaf springs 1. Limiting grooves 10 are opened on both sides of the multiple leaf springs 1. A base plate 9 is installed on the bottom surface of the lower leaf spring 1. Two mounting holes 13 are opened in the middle of the base plate 9 and the multiple leaf springs 1. First fasteners 18 are installed in the two mounting holes 13 respectively. A limiting frame 3 is installed on the outer wall of the multiple leaf springs 1, and the four corners of the limiting frame 3 are respectively inserted into the limiting grooves 10. An upper bracket 7 and a lower bracket 5 are arranged sequentially from top to bottom on the bottom surface of the base plate 9. Two U-bolts 2 are installed on the outer wall of the limiting frame 3. A cross plate 6 is slidably installed at the bottom end of the two U-bolts 2. Two locking nuts 8 are threadedly connected to the ends of the two U-bolts 2.

[0024] The two sides of the base plate 9 are also provided with limiting grooves 10, which are aligned with the limiting grooves 10 on the multiple leaf springs 1, so that the four legs of the limiting frame 3 can enter the interior of the limiting grooves 10 to limit the installation of the limiting frame 3. At the same time, the mounting hole 13 on the bottom surface of the base plate 9 is stepped, and the shape of the inner wall is adapted to the bottom end of the first fastener 18. Thus, during the tightening of the first fastener 18, the first fastener 18 is prevented from rotating as a whole, making it convenient for the operator to use tightening tools for tightening and installation.

[0025] Two limiting clips 4 are installed on both sides of the middle of multiple leaf springs 1. The length of multiple leaf springs 1 increases sequentially from bottom to top. As an optional technical solution of this utility model, the limiting clips 4 include a concave plate 401. A fastening bolt 402 is installed on the bottom surface of the concave plate 401, which is threadedly connected to a leaf spring 1. A second fastener 403 is installed on the top of the concave plate 401. A cotter pin 404 is inserted into one end of the second fastener 403, which limits and blocks the nut on the second fastener 403 to prevent it from falling off.

[0026] The top ends of the two first fasteners 18 are each sleeved with a limiting sleeve 17. The top end of the inner wall of the limiting frame 3 is provided with a first slot 11. The two ends of the limiting sleeve 17 are slidably connected to the two first slots 11 respectively. As an optional technical solution of this utility model, the middle part of the limiting sleeve 17 is provided with two through slots. Its shape is the same as that of the nut on the first fastener 18, which facilitates the sleeve with the nut on the first fastener 18. After the limiting frame 3 is installed, the two ends of the limiting sleeve 17 enter the interior of the first slot 11, which facilitates the limiting sleeve 17 to be limited and pressed, so as to prevent the first fastener 18 from loosening. The first fastener 18 stably connects the multiple leaf springs 1 and the base 9, and at the same time, it is threadedly connected with two U-bolts 2 and locking nuts 8 to prevent the multiple leaf springs 1 from falling off.

[0027] The limit frame 3 has a second slot 12 on both sides of its outer wall. Two U-bolts 2 are located inside the second slot 12. As an optional technical solution of this utility model, the second slot 12 provides an installation position for the U-bolts 2. When the locking nut 8 is connected to the U-bolt 2, the upper bracket 7 and the lower bracket 5 are driven by the two horizontal plates 6 to clamp the frame, thereby stably installing the leaf spring 1 on the outer frame and preventing multiple leaf springs 1 from loosening and falling off.

[0028] Positioning pin holes 19 are provided at the four corners of the upper card holder 7 and the four corners of the base plate 9, and positioning pins 16 are slidably installed between two adjacent positioning pin holes 19. As an optional technical solution of this utility model, this facilitates the positioning of the connection between the base plate 9 and the upper card holder 7, so that the base plate 9 and the upper card holder 7 are stably connected. At the same time, the two ends of the upper card holder 7 protrude downward and form a saddle shape, which makes it easier for it to be locked onto the external frame.

[0029] The lower bracket 5 has a third slot 15 on both sides of its bottom surface. The two horizontal plates 6 are slidably connected to the third slot 15. As an optional technical solution of this utility model, the two ends of the lower bracket 5 are bent upward to form a saddle shape. The two third slots 15 facilitate the installation position of the two horizontal plates 6, so that the horizontal plates 6 are stably installed in them. After the U-bolt 2 is connected to the locking nut 8, it is convenient to apply pressure to the horizontal plates 6, thereby pushing the lower bracket 5 and the upper bracket 7 to move relative to each other and be stably installed on the external frame.

[0030] The following steps are required when using this semi-trailer leaf spring anti-detachment device:

[0031] 1) During installation, multiple leaf springs 1 of different lengths are placed on the base plate 9 in sequence and locked with the first fastener 8;

[0032] 2) Install the four limit clips 4 in sequence and tighten them with fastening bolts 402;

[0033] 3) Place the upper card holder 7 on the external frame and install the four positioning pins 16;

[0034] 4) Place the assembly of base 9 and leaf spring 1 on the top surface of upper card seat 7, and allow the four positioning pins 16 to enter the positioning pin holes 19 of base 9.

[0035] 5) Place the limiting sleeve 17 at the top of the two first fasteners 18, then place the limiting bracket 3 in the limiting grooves 10 on both sides of the leaf spring 1, and then place the two U-bolts 2 in the second slot 12.

[0036] 6) Install the lower bracket 5 and the two horizontal plates 6, and then tighten them symmetrically with the locking nuts 8 to complete the overall installation.

[0037] In summary, during use, multiple leaf springs 1 and a limiting bracket 3 are installed. The limiting bracket 3 is slidably installed on both sides of the leaf springs 1. Simultaneously, two first fasteners 18 fix the base plate 9 to the multiple leaf springs 1. Two U-bolts 2 are placed on the outer walls of the limiting bracket 3, base plate 9, upper bracket 7, and lower bracket 5, thereby securing the upper bracket 7 and lower bracket 5 onto the external frame. These are then locked using the U-bolts 2, the cross plate 6, and the locking nut 8. This ensures the limiting bracket 3 is stably installed on the outer walls of the multiple leaf springs 1 and, in conjunction with the two first fasteners 18, provides a secure connection to the multiple leaf springs 1, improving the stability of the leaf springs after installation. The limiting sleeve 17 prevents the first fasteners 18 from loosening, thus preventing the leaf springs from slipping. The problem of leaf spring 1 falling off is effectively solved by setting a limiting frame 3 and a limiting sleeve 17. The top wall of the limiting frame 3 has two second slots 12, which are slidably connected to the two ends of the limiting sleeve 17, thus facilitating the limiting of the limiting sleeve 17 and preventing it from loosening. Four positioning pins 16 are set, which are slidably connected to the positioning pin holes 19 on the upper card seat 7 and the base plate 9, thus facilitating the installation of the upper card seat 7 and the base plate 9. At the same time, the upper card seat 7 blocks the first fastener 8 to prevent it from falling off. By setting four limiting clips 4, the end position of the leaf spring 1 is limited during the elastic deformation of the leaf spring 1, thus preventing the leaf spring 1 from being misaligned.

[0038] 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 semi-trailer leaf spring anti-detachment device, characterized in that: The device includes multiple stacked leaf springs (1), each leaf spring (1) has a limiting groove (10) on both sides, a base plate (9) is installed on the bottom surface of the lower leaf spring (1), and two mounting holes (13) are opened in the middle of the base plate (9) and the multiple leaf springs (1). The first fastener (18) is installed in the interior of the two mounting holes (13). The outer walls of the multiple leaf springs (1) are jointly installed with a limiting frame (3), and the four corners of the limiting frame (3) are respectively inserted into the limiting groove (10). The bottom surface of the base plate (9) is provided with an upper card seat (7) and a lower card seat (5) from top to bottom. The outer wall of the limiting frame (3) is installed with two U-bolts (2), and the bottom ends of the two U-bolts (2) are slidably installed with a horizontal plate (6). The ends of the two U-bolts (2) are threadedly connected with two locking nuts (8).

2. The anti-detachment device for semi-trailer leaf springs according to claim 1, characterized in that: Two limiting clips (4) are installed on both sides of the middle part of the multiple leaf springs (1), and the length of the multiple leaf springs (1) increases sequentially from bottom to top.

3. The anti-detachment device for semi-trailer leaf springs according to claim 2, characterized in that: The top ends of the two first fasteners (18) are connected to limit sleeves (17), and the top end of the inner wall of the limit frame (3) is provided with a first slot (11). The two ends of the limit sleeve (17) are slidably connected to the two first slots (11) respectively.

4. The anti-detachment device for semi-trailer leaf springs according to claim 3, characterized in that: The limiting frame (3) has a second slot (12) on both sides of its outer wall, and the two U-bolts (2) are located inside the second slot (12).

5. A semi-trailer leaf spring anti-detachment device according to claim 4, characterized in that: Positioning pin holes (19) are provided at the four corners of the upper card holder (7) and the four corners of the base plate (9), and positioning pins (16) are slidably installed between two adjacent positioning pin holes (19).

6. A semi-trailer leaf spring anti-detachment device according to claim 5, characterized in that: The lower card holder (5) has a third card slot (15) on both sides of its bottom surface, and the two horizontal plates (6) are slidably connected to the third card slot (15).

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